[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

EP3551829A1 - Drilling machine comprising an auger and device for cleaning the auger - Google Patents

Drilling machine comprising an auger and device for cleaning the auger

Info

Publication number
EP3551829A1
EP3551829A1 EP17822403.6A EP17822403A EP3551829A1 EP 3551829 A1 EP3551829 A1 EP 3551829A1 EP 17822403 A EP17822403 A EP 17822403A EP 3551829 A1 EP3551829 A1 EP 3551829A1
Authority
EP
European Patent Office
Prior art keywords
carriage
mast
auger
speed
drilling machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17822403.6A
Other languages
German (de)
French (fr)
Other versions
EP3551829B1 (en
Inventor
Laurent Pivert
Régis Bernazinski
Marie Lebreton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Soletanche Freyssinet SA
Original Assignee
Soletanche Freyssinet SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Soletanche Freyssinet SA filed Critical Soletanche Freyssinet SA
Publication of EP3551829A1 publication Critical patent/EP3551829A1/en
Application granted granted Critical
Publication of EP3551829B1 publication Critical patent/EP3551829B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B12/00—Accessories for drilling tools
    • E21B12/06—Mechanical cleaning devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
    • B08B1/16—Rigid blades, e.g. scrapers; Flexible blades, e.g. wipers
    • B08B1/165—Scrapers

Definitions

  • the present invention relates to the field of cleaning a drilling machine auger, such a machine being generally used to make piles in a soil.
  • an auger is a drilling tool formed of a helical blade which is generally wound around a tubular axial rod.
  • the auger is screwed into the ground to the desired depth. Pressurized concrete is then injected by the axial rod under the auger, which has the effect of gradually moving the auger upwards.
  • This operation thus has the advantage of simultaneously concreting the pile, avoid collapse of the walls of the borehole during the extraction of the auger, and reduce the pulling force necessary to extract the auger.
  • the extraction of the auger is generally performed without rotation of the latter, and this to avoid creating faults in the pile to achieve. Some extractions, however, are accompanied by a rotation of the auger, for example in the manufacture of pin piles.
  • the cuttings are raised between the turns of the auger where they remain very often glued, even after their exit outside the borehole.
  • Drilling machines equipped with cleaning devices are known for evacuating the cuttings housed between the turns of the auger.
  • some comprise a rotary doctor blade which is inserted between two adjacent turns of the auger, the doctor blade rotating around the auger during the ascent, without rotation, of the latter.
  • the invention relates more specifically to such a drilling machine comprising:
  • an auger having a longitudinal axis parallel to the longitudinal direction and comprising a helical blade
  • a displacement device for moving the auger relative to the mast in translation along the longitudinal direction
  • an auger cleaning device comprising a carriage mounted to the mast slidably in the longitudinal direction of the mast, the carriage having a body surrounding the auger and a squeegee rotatably mounted to the body about an axis of rotation parallel to the longitudinal direction, the doctor blade extending between a lower turn and an upper turn of the helical blade.
  • scraper blade is mounted on a member rotating at the desired speed around the auger, said member being supported by a frame capable of sliding upwards. bottom and bottom up along the carrier mast to which the auger is suspended.
  • This sliding of the frame takes place in the event of a lack of synchronism between the speed of rotation of the scraper blade and the vertical extraction speed of the auger.
  • This lack of synchronism has the effect of moving in translation the scraper blade, and thus the frame, along the mast.
  • upper and lower stops are provided to prevent the sliding frame from being driven by the auger to either of the upper and lower ends of the mast.
  • the frame may come bang against the stops and damage.
  • the scraper blade may also be broken if the extraction speed of the auger continues to increase (or decrease) while the frame is in abutment with the upper (or lower) stop.
  • Another disadvantage of the prior art is that existing doctor blade cleaning devices need to be manually engaged between two turns prior to concreting, and then cleared from the auger before the next drilling. These human interventions at the foot of the auger are potentially dangerous.
  • An object of the present invention is to overcome these disadvantages.
  • the invention achieves its object by the fact that the drilling machine further comprises a measuring member for determining the movement of the carriage along the mast with respect to an initial position of said carriage, and the cleaning device further comprises a device speed regulator for regulating the speed of rotation of the doctor blade according to said movement of the carriage.
  • the regulation of the speed of rotation of the doctor blade according to the invention depends on the displacement of the carriage, so that the regulation of the speed of the doctor blade can be carried out during the different phases of manufacture of the pile.
  • the speed regulation of the doctor blade can be performed when:
  • the regulation of the speed of rotation of the blade makes it possible to correct the vertical position of the carriage.
  • This speed regulation is preferably carried out in real time so as to maintain the carriage in a predetermined vertical position, for example the initial position of the carriage, or at least in a zone defined between two predetermined vertical positions, for example a centered zone. on the initial position of the carriage, and whatever the phase of realization of the pile. Consequently, the invention makes it possible to prevent damage to the squeegee by controlling the vertical position of the carriage and also to prevent human intervention at the level of the potentially dangerous carriage by virtue of the fact that the squeegee can remain engaged. between turns for the duration of the operations.
  • the carriage during operation of the cleaning device during a concreting phase, the carriage is in the initial position, and the auger is extracted from the ground at a predetermined initial vertical extraction speed and constant.
  • the doctor blade Under normal operating conditions, the doctor blade has a rotational speed determined so that the doctor blade performs a complete revolution around the auger when the latter has advanced one step of the helical blade. In these conditions, the truck does not move.
  • the extraction speed of the auger is not necessarily constant.
  • the movement of the carriage towards the lower end is determined by the measuring member and the speed of rotation of the doctor blade is regulated as a function of this movement of the carriage.
  • the speed of rotation of the doctor blade is decreased, for example so as to stop or at least slow down the vertical movement of the carriage towards the lower end of the mast.
  • the displacement of the carriage is determined by the measuring member and the speed of rotation of the doctor blade is regulated as a function of the movement of the carriage.
  • the speed of rotation of the doctor blade is increased, for example so as to stop or slow down the vertical movement of the carriage towards the upper end of the mast. Thanks to this speed regulation, it prevents the carriage from reaching the upper end of the mast or a possible upper stop, which could cause damage to the doctor blade.
  • determining the movement of the carriage relative to its initial position is meant that the measuring member is configured to measure the displacement of the carriage from its initial position, or at least to detect a movement of the carriage towards the upper end or the lower end of the mast.
  • the speed control device is configured to change the speed of rotation of the doctor blade according to the movement of the carriage relative to the initial position, so as to bring the carriage back to the initial position when a displacement of the carriage relative to the initial position.
  • the speed control device is configured to modify the speed of rotation of the doctor blade as a function of the displacement of the carriage relative to the initial position, so as to bring the carriage back to a zone situated around the initial position during a movement of the carriage out of said area.
  • the speed control device thus makes it possible to maintain the carriage substantially in its initial position, whatever the variations, positive or negative, of the vertical extraction speed of the auger. This ensures that the carriage remains always away from any lower and upper stops.
  • the speed regulating device is configured to increase the speed of rotation of the doctor blade when the carriage moves to an upper end of the mast. It is understood that, depending on its amplitude, the increase in the rotational speed of the doctor blade has the effect of slowing down or stopping the movement of the carriage towards the upper end, or even driving the carriage towards the lower end of the mast if the rotational speed of the doctor blade is greater than the ratio of the extraction speed on the pitch of the helical blade.
  • This increase in rotational speed of the doctor blade is preferably initiated when the displacement of the carriage, as determined by the measuring member, is greater than a first predetermined threshold.
  • the speed control device is configured to decrease the speed of rotation of the doctor blade when the carriage moves towards a lower end of the mast. It is understood that, according to its amplitude, the decrease in the rotational speed of the doctor blade has the effect of slowing or stopping the movement of the carriage towards the lower end of the mast, or even to move the carriage towards the upper end of the mast if the speed of rotation of the doctor blade is lower than the ratio of the extraction speed on the pitch of the helical blade.
  • This reduction in rotational speed of the doctor blade can be initiated when the displacement of the carriage, as determined by the measuring element, is greater than a second predetermined threshold.
  • the speed regulating device is configured so that the value of the speed of rotation of the doctor blade is a function of the value of the movement of the carriage determined by the measuring member.
  • the speed of rotation of the doctor blade is an increasing function of the displacement value of the carriage, considered from the initial position towards the upper end of the mast.
  • the speed of rotation of the squeegee increases more and more as the carriage approaches the upper end of the mast.
  • the speed of rotation of the doctor blade decreases more and more as the carriage approaches the lower end of the mast.
  • the speed regulating device is configured such that the speed of rotation of the doctor blade is a linear increasing function of the movement of the carriage along the mast.
  • said measuring member is disposed between the carriage and the mast.
  • the measuring member comprises at least one jack disposed between the body and the mast, the displacement of the carriage being determined from the variation in length of the jack.
  • the measuring member comprises a displacement sensor integrated in the jack.
  • the jack is a hydraulic cylinder.
  • the high and low stroke end of the cylinder constitute lower and upper stops for the carriage.
  • the weight of the auger cleaning device is increasing with increasing auger diameters, the squeegee, which generally bears on the lower turn, undergoes significant efforts that could seriously damage it.
  • the cleaning device further comprises a force regulating device for regulating the force applied by the doctor blade on the lower turn.
  • the force regulating device is configured to exert on the carriage a lift force counteracting at least part of the weight of the carriage, so as to reduce the force exerted by the doctor blade on the lower coil while ensuring that the scraper remains in support against the lower turn.
  • the modulus of the lift force is equal to a fraction of the weight of the carriage.
  • the force regulation device is disposed between the carriage and the mast.
  • the force regulation device comprises at least one actuator disposed between the body and the mast, the actuator being configured to exert a thrust force on the body, said thrust force being directed in the longitudinal direction of the mast, towards an upper end of the mast.
  • the actuator comprises a hydraulic cylinder.
  • the hydraulic cylinder is fed at a constant hydraulic fluid pressure.
  • the measuring member comprises the hydraulic jack of the actuator.
  • the hydraulic cylinder disposed between the mast and the carriage has an advantageous dual function, namely to determine the movement of the carriage and reduce the force exerted by the doctor blade on the lower turn of the helical blade of the auger.
  • FIG. 1 is a perspective view of a drilling machine according to the invention, the carriage of the cleaning device being in the initial position;
  • FIG. 1 illustrates the drilling machine of Figure 1, the carriage being in the high position
  • FIG. 3 illustrates the drilling machine of Figure 1, the carriage being in the low position
  • FIG. 4 illustrates the drilling machine of FIG. 1 as well as its device for regulating the speed of the doctor blade
  • FIG. 5 is a graph illustrating the variation of the doctor blade rotation speed as a function of the movement of the carriage along the mast.
  • the drilling machine 10 is intended for drilling, and in particular piles in the ground. As this type of auger drilling machine is already known, only the elements necessary for understanding the invention will be described here.
  • the drilling machine 10 comprises a mast 12 which has a longitudinal direction L; in this example, the longitudinal direction L is vertical.
  • the drilling machine 10 further comprises an auger 14 having a longitudinal axis A parallel to the longitudinal direction L.
  • the auger 14 comprises a hollow tube 16 which extends along the longitudinal axis A, this tube being fixed to and surrounded by a helical blade 18.
  • the auger may be composed of several portions fixed end to end.
  • the helical blade has an outer diameter D.
  • the drilling machine 10 also comprises a displacement device (not shown here) to move the auger 14 relative to the mast 12 in translation along the longitudinal direction L.
  • This displacement device is notably actuated during the drilling step and to screw the auger into the ground, and during the extraction step of the auger out of the ground.
  • the extraction of the auger from the ground which occurs after the drilling operation, consists of a vertical translation without rotation.
  • the drilling machine 10 further comprises a device 20 for cleaning the auger 14 whose function is to evacuate the cuttings housed between the turns of the auger. the helical blade during extraction of the auger.
  • the cleaning device 20 comprises a carriage 22 which has the general shape of a drum traversed axially by the auger 14.
  • the carriage 22 thus has a diameter slightly larger than the diameter D of the helical blade 18.
  • the carriage 22 is slidably mounted to the mast 12 in the longitudinal direction L of the mast 12. To this end, in this nonlimiting example, the carriage is mounted on rails fixed along the mast.
  • the carriage comprises a body 24 of cylindrical shape which surrounds the auger.
  • the body 24 is supported by a pair of hydraulic cylinders 30 disposed between the mast and the carriage.
  • the cleaning device 20 further comprises a doctor blade 40 which is disposed below the body 24.
  • the doctor blade is mounted on an inner drum 26 of the cleaning device 20, the inner drum 26 being arranged coaxially inside the body 24.
  • the doctor blade extends between a lower turn 18a and an upper turn 18b of the helical blade 18 in order to evacuate the cuttings lying between the two turns.
  • the doctor blade remains engaged between the two turns during the other movements of the auger, especially during the drilling phases.
  • the doctor blade has the shape of a plate having a height H substantially equal to the axial distance between the lower turn 18a and the upper turn 18b.
  • the cleaning device 20 further comprises a motor 28 for rotating the inner drum 26 with the doctor blade 24 about the longitudinal axis A.
  • the doctor blade rotates about the axis of rotation A of the auger while extending between the lower turn 18a and the upper turn 18b, which makes it possible to evacuate the cuttings housed between the lower turn and the upper turn. .
  • the squeegee 40 is preferably mounted on the drum 26 pivotally so as to release the squeegee outside the volume of the auger when screwing the auger in the soil during the drilling operation.
  • FIG. 1 there is shown a vertical axis Z which extends parallel to the longitudinal direction L of the mast and which is oriented towards an upper end 12a of the mast.
  • the reference Z 0 corresponds to the initial position of the carriage 22 illustrated in FIG.
  • the auger is in extraction phase without rotation, so that the vertical displacement speed of the auger corresponds to the vertical extraction speed.
  • the initial speed ⁇ 0 of the doctor blade 40 about the axis of rotation A is set to be equal to Vo / p where p is the pitch of the helical blade 18, so that the carriage does not move. not vertically when the speed of extraction without rotation of the auger is equal to V 0 .
  • the carriage 22 will be driven by the auger in the longitudinal direction L, or towards the upper end 12a of the auger.
  • mast 12 if the extraction speed of the auger Vi is greater than the initial speed V 0 / as illustrated in FIG. 2, or towards the lower end 12b of the mast 12 if the vertical extraction speed V2 the auger is less than the speed V 0 , as illustrated in FIG.
  • the measuring member 50 is disposed between the carriage 22 and the mast 12. It comprises the hydraulic jack 30, so that the displacement of the carriage 22 is determined from the variation of the length of the cylinder 30.
  • the jack 30 comprises a displacement sensor 52 which makes it possible to measure the value of the displacement of the carriage 22.
  • the non-rotating extraction speed V 2 is less than V 0 and the carriage 22 has moved towards the lower end 12a of the mast 12 by a distance ⁇ 2 to reach the Z 2 position. below the Z 0 position.
  • ⁇ 2 ⁇ 2 - ⁇ , with ⁇ 2 ⁇ 0.
  • the cleaning device 20 further comprises a speed control device 54, shown diagrammatically in FIG. 4 for regulating the speed of rotation ⁇ of the doctor blade 40 as a function of the displacement ⁇ of the carriage determined by the measured.
  • the speed control device 54 is connected to the displacement sensor 52, and controls the motor 28 by providing it with a speed reference ⁇ of the doctor blade.
  • the speed control device controls the speed control device
  • the speed control device 54 is configured to change the speed of rotation ⁇ of the blade 40 as a function of the displacement ⁇ of the carriage, so as to bring the carriage 22 to the initial position Z 0 during a movement of the carriage relative to the initial position Z 0 .
  • the speed control device 54 is configured to increase the speed of rotation ⁇ of the doctor blade 40 when the carriage 22 moves towards the upper end 12a of the mast 12.
  • the measuring member 50 has determined that the carriage 22 has moved from the distance ⁇ towards the upper end 12a of the mast 12. Consequently, the speed regulating device 54 sends the speed instruction ⁇ to the motor 28 in order to increase the speed of rotation of the doctor blade 40.
  • the rotational speed ⁇ is strictly greater than the initial speed ⁇ 0 . It will be explained below how the speed ⁇ is determined.
  • the speed control device 54 is configured to reduce the speed of rotation ⁇ of the doctor blade 40 when the carriage moves towards the lower end 12b of the mast 12.
  • the measuring member 50 has determined that the carriage 22 has moved by a distance ⁇ 2 from the initial position Z 0 to the lower end 12b of the mast 12. Consequently, the speed control device 54 decreases the rotational speed ⁇ of the doctor blade 40 to bring it to the speed of rotation ⁇ 2 lower than the initial speed ⁇ 0 .
  • the speed control device 54 is configured such that the rotational speed ⁇ is a linear increasing function of the displacement ⁇ of the carriage along the mast.
  • the rotational speed variation ⁇ of the doctor blade 40 is illustrated as a function of the Z position of the carriage 22 with respect to its initial position Z 0 .
  • the curve illustrated in FIG. 5 is an increasing linear function representing the variation of speed as a function of the vertical displacement of the carriage with respect to Z 0 .
  • ⁇ k * (Z-Zo), where k is the coefficient of proportionality.
  • the pitch p of the blade is generally between 0.3 and 2 meters, and the speed of ascent of the auger can vary between 50 and 200 meters per hour.
  • values of k make it possible to ensure that the speed of rotation of the doctor blade is adapted to stop the removal of the carriage 22 from its initial position Z 0 .
  • Other values of k may be chosen according to the pitch of the blade.
  • the device can also be parameterized so that the speed ⁇ is sufficient to return the carriage 22 to the initial position Z 0 , this displacement being illustrated by the arrow F1 in FIG. 2.
  • the rotation speed variation ⁇ will be determined by choosing a coefficient k higher than those proposed above. It is understood in particular that the carriage will return to its initial position if the extraction speed without rotation fluctuates around the value V 0 .
  • the rotational speed variation ⁇ 2 may be calibrated so that the carriage 22 returns to its initial position Zo when the carriage 22 is moved towards the lower end 12b of the mast 12, this displacement of the carriage being illustrated by the arrow F2 in FIG.
  • the doctor blade 40 bears on the lower turn 18a of the helical blade 18.
  • the force exerted by the doctor blade 40 on the lower turn 18a is constituted by the self weight of the carriage.
  • the cleaning device further comprises a force control device 60, shown schematically in FIG. 1 for regulating the force applied by the doctor blade 40 on the lower turn 18a.
  • This force regulation device 60 comprises the hydraulic cylinder 30 disposed between the carriage 22 and the mast 12.
  • the jack 30 thus constitutes an actuator 31 which is arranged between the body and the mast being configured to exert a thrust force T on the body 24.
  • This thrust force being, in this example, equal to a fraction of the weight of the carriage, in this case 50% of the weight of the carriage 22.
  • the thrust force T is directed along the longitudinal direction L of the mast towards the upper end of the mast 12.
  • this thrust force T reduces the vertical pressure force exerted by the doctor blade 40 on the lower turn 18a.
  • the hydraulic cylinder 30 is fed at a constant hydraulic fluid pressure.
  • the measuring member 50 comprises the hydraulic jack 30 of the actuator 31.
  • the speed control device 54 is also able to regulate the speed of rotation of the doctor blade 40 during a vertical extraction phase of the auger 14 with rotation, which whatever its direction of rotation.
  • the speed control device of the blade 40 is also able to regulate the speed of the doctor blade during the drilling phase, that is to say during a vertical downward movement of the auger with rotation, corresponding to a screwing movement of the auger into the ground.
  • the regulating device is also able to regulate the speed of rotation of the doctor blade 40 during a rotation of the auger, without vertical displacement of the latter, in order to correct a displacement of the carriage 22 which could result from a variation of the rotational speed of the auger 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Abstract

The invention relates to a drilling machine (10) comprising: a mast (12); an auger (14); a cleaning device (20) for cleaning the auger (14), comprising a carriage (22) mounted on the mast (12) such as to be able to slide in the longitudinal direction (L) of the mast (12), the carriage comprising a body (24) surrounding the auger and a rotary scraper (40), the scraper extending between a lower turn (18a) and an upper turn (18b) of the auger. The invention is characterized iin that the drilling machine (10) comprises a measurement member (50) for determining the movement (ΔΖι) of the carriage (22) along the mast (12) with respect to an initial position (Z0), and the cleaning device (20) comprises a device (54) for regulating the rotational speed (ω) of the scraper (40) according to the said movement (ΔΖι) of the carriage.

Description

MACHINE DE FORAGE COMPRENANT UNE TARIERE ET UN DISPOSITIF DE NETTOYAGE DE LA TARIERE  DRILLING MACHINE COMPRISING A TARIERE AND A DEVICE FOR CLEANING THE TARI
Arrière-plan de l'invention Background of the invention
La présente invention porte sur le domaine du nettoyage d'une tarière de machine de forage, une telle machine étant généralement utilisée pour réaliser des pieux dans un sol.  The present invention relates to the field of cleaning a drilling machine auger, such a machine being generally used to make piles in a soil.
De façon connue, une tarière est un outil de forage formé d'une pale hélicoïdale qui est généralement enroulée autour d'une tige axiale tubulaire.  In known manner, an auger is a drilling tool formed of a helical blade which is generally wound around a tubular axial rod.
Traditionnellement, la tarière est vissée dans le sol jusqu'à la profondeur souhaitée. Du béton sous pression est ensuite injecté par la tige axiale sous la tarière, ce qui a pour effet de déplacer progressivement la tarière vers le haut.  Traditionally, the auger is screwed into the ground to the desired depth. Pressurized concrete is then injected by the axial rod under the auger, which has the effect of gradually moving the auger upwards.
Cette opération présente ainsi l'avantage de réaliser simultanément le bétonnage du pieu, d'éviter l'effondrement des parois du forage lors de l'extraction de la tarière, et de réduire la force de traction nécessaire pour extraire la tarière.  This operation thus has the advantage of simultaneously concreting the pile, avoid collapse of the walls of the borehole during the extraction of the auger, and reduce the pulling force necessary to extract the auger.
L'extraction de la tarière s'effectue généralement sans rotation de cette dernière, et ce afin d'éviter de créer des défauts dans le pieu à réaliser. Certaines extractions s'accompagnent toutefois d'une mise en rotation de la tarière, par exemple dans le cadre de la fabrication de pieux à ergots.  The extraction of the auger is generally performed without rotation of the latter, and this to avoid creating faults in the pile to achieve. Some extractions, however, are accompanied by a rotation of the auger, for example in the manufacture of pin piles.
Lors de l'extraction sans rotation de la tarière, les déblais sont remontés entre les spires de la tarière où ils restent très souvent collés, même après leur sortie à l'extérieur du forage.  During the extraction without rotation of the auger, the cuttings are raised between the turns of the auger where they remain very often glued, even after their exit outside the borehole.
Il est donc nécessaire de nettoyer la tarière au fur et à mesure de son extraction. Ce nettoyage doit d'une part pouvoir être le plus rapide possible afin d'éviter de ralentir l'extraction de la tarière, et d'autre part être assez efficace pour qu'aucun déblais ne restent collés entre les spires et ne retombent ultérieurement du haut de la tarière, ce qui pourrait blesser un opérateur se trouvant à proximité.  It is therefore necessary to clean the auger as it is extracted. This cleaning must firstly be as fast as possible to avoid slowing the extraction of the auger, and secondly be effective enough so that cuttings do not remain stuck between the turns and do not fall back later. top of the auger, which could hurt an operator nearby.
On connaît des machines de forage munies de dispositifs de nettoyage permettant d'évacuer les déblais logés entre les spires de la tarière. Parmi les différents dispositifs de nettoyage, certains comportent une racle rotative qui s'insère entre deux spires adjacentes de la tarière, la racle tournant autour de la tarière pendant la remontée, sans rotation, de cette dernière. Drilling machines equipped with cleaning devices are known for evacuating the cuttings housed between the turns of the auger. Among the various cleaning devices, some comprise a rotary doctor blade which is inserted between two adjacent turns of the auger, the doctor blade rotating around the auger during the ascent, without rotation, of the latter.
L'invention porte plus précisément sur une telle machine de forage comportant :  The invention relates more specifically to such a drilling machine comprising:
un mât ayant une direction longitudinale ;  a mast having a longitudinal direction;
une tarière ayant un axe longitudinal parallèle à la direction longitudinale et comprenant une pale hélicoïdale ;  an auger having a longitudinal axis parallel to the longitudinal direction and comprising a helical blade;
un dispositif de déplacement pour déplacer la tarière par rapport au mât en translation selon la direction longitudinale ;  a displacement device for moving the auger relative to the mast in translation along the longitudinal direction;
un dispositif de nettoyage de la tarière comprenant un chariot monté au mât de façon coulissante selon la direction longitudinale du mât, le chariot comportant un corps entourant la tarière et une racle montée au corps de façon rotative autour d'un axe de rotation parallèle à la direction longitudinale, la racle s'étendant entre une spire inférieure et une spire supérieure de la pale hélicoïdale.  an auger cleaning device comprising a carriage mounted to the mast slidably in the longitudinal direction of the mast, the carriage having a body surrounding the auger and a squeegee rotatably mounted to the body about an axis of rotation parallel to the longitudinal direction, the doctor blade extending between a lower turn and an upper turn of the helical blade.
Une telle machine de forage est notamment décrite dans le document FR 2 563 861. Dans ce document, la lame racleuse est montée sur un organe tournant à la vitesse désirée autour de la tarière, ledit organe étant supporté par un bâti susceptible de coulisser de haut en bas et de bas en haut le long du mât porteur auquel est suspendue la tarière.  Such a drilling machine is described in particular in document FR 2 563 861. In this document, the scraper blade is mounted on a member rotating at the desired speed around the auger, said member being supported by a frame capable of sliding upwards. bottom and bottom up along the carrier mast to which the auger is suspended.
Ce coulissement du bâti a lieu en cas de manque de synchronisme entre la vitesse de rotation de la lame racleuse et la vitesse verticale d'extraction de la tarière. Ce manque de synchronisme a pour effet de déplacer en translation la lame racleuse, et donc le bâti, le long du mât.  This sliding of the frame takes place in the event of a lack of synchronism between the speed of rotation of the scraper blade and the vertical extraction speed of the auger. This lack of synchronism has the effect of moving in translation the scraper blade, and thus the frame, along the mast.
Aussi, en cas d'augmentation de la vitesse d'extraction de la tarière, le bâti se déplacera vers l'extrémité supérieure du mât, tandis que, inversement, en cas de diminution de la vitesse d'extraction de la tarière, le bâti se déplacera vers l'extrémité inférieure du mât.  Also, in the event of an increase in the extraction speed of the auger, the frame will move towards the upper end of the mast, whereas, conversely, in the event of a decrease in the extraction speed of the auger, the casting will move to the lower end of the mast.
Généralement, des butées supérieure et inférieure sont prévues pour empêcher que le bâti coulissant ne soit emmené par la tarière à l'une ou l'autre des extrémités supérieure et inférieure du mât.  Generally, upper and lower stops are provided to prevent the sliding frame from being driven by the auger to either of the upper and lower ends of the mast.
En cas de modification importante de la vitesse d'extraction de la tarière, le bâti risque de venir taper contre les butées et de s'endommager. On risque également de casser la lame racleuse si la vitesse d'extraction de la tarière continue à augmenter (resp. diminuer) alors que le bâti est en butée contre la butée supérieure (resp. inférieure). Un autre inconvénient de l'art antérieur est que les dispositifs de nettoyage à racle existants nécessitent d'être engagés manuellement entre deux spires avant le bétonnage, puis dégagés de la tarière avant le forage suivant. Ces interventions humaines au pied de la tarière sont potentiellement dangereuses. If there is a significant change in the speed of extraction of the auger, the frame may come bang against the stops and damage. The scraper blade may also be broken if the extraction speed of the auger continues to increase (or decrease) while the frame is in abutment with the upper (or lower) stop. Another disadvantage of the prior art is that existing doctor blade cleaning devices need to be manually engaged between two turns prior to concreting, and then cleared from the auger before the next drilling. These human interventions at the foot of the auger are potentially dangerous.
Obiet et résumé de l'invention Obiet and summary of the invention
Un but de la présente invention est de remédier à ces inconvénients.  An object of the present invention is to overcome these disadvantages.
L'invention atteint son but par le fait que la machine de forage comporte en outre un organe de mesure pour déterminer le déplacement du chariot le long du mât par rapport à une position initiale dudit chariot, et le dispositif de nettoyage comporte en outre un dispositif de régulation de vitesse pour réguler la vitesse de rotation de la racle en fonction dudit déplacement du chariot.  The invention achieves its object by the fact that the drilling machine further comprises a measuring member for determining the movement of the carriage along the mast with respect to an initial position of said carriage, and the cleaning device further comprises a device speed regulator for regulating the speed of rotation of the doctor blade according to said movement of the carriage.
On comprend que la régulation de vitesse de rotation de la racle de la machine selon l'invention dépend du déplacement du chariot, si bien que la régulation de la vitesse de la racle peut être réalisée lors des différentes phases de fabrication du pieu.  It will be understood that the regulation of the speed of rotation of the doctor blade according to the invention depends on the displacement of the carriage, so that the regulation of the speed of the doctor blade can be carried out during the different phases of manufacture of the pile.
Notamment, la régulation de vitesse de la racle peut être réalisée lors :  In particular, the speed regulation of the doctor blade can be performed when:
• d'une phase de forage de la tarière, la tarière se déplaçant verticalement dans le sol tout en tournant sur elle-même selon un mouvement de vissage ;  • a drilling phase of the auger, the auger moving vertically in the ground while rotating on itself in a screwing movement;
· d'une phase de remontée, généralement avec bétonnage, au cours de laquelle on réalise une extraction verticale de la tarière, sans ou avec rotation de la tarière ;  · An ascent phase, generally with concreting, during which a vertical extraction of the auger is carried out, with or without rotation of the auger;
• d'une phase de rotation de la tarière sans déplacement vertical.  • a phase of rotation of the auger without vertical displacement.
La régulation de la vitesse de rotation de la racle permet de corriger la position verticale du chariot. Cette régulation de vitesse est préférentiellement réalisée en temps réel de manière à maintenir le chariot en une position verticale prédéterminée, par exemple la position initiale du chariot, ou à tout le moins dans une zone définie entre deux positions verticales prédéterminées, par exemple une zone centrée sur la position initiale du chariot, et ce quelle que soit la phase de réalisation du pieu. En conséquence, l'invention permet d'éviter un endommagement de la racle, grâce à la maîtrise de la position verticale du chariot, et également d'éviter une intervention humaine au niveau du chariot potentiellement dangereuse grâce au fait que la racle peut rester engagée entre les spires pendant toute la durée des opérations. The regulation of the speed of rotation of the blade makes it possible to correct the vertical position of the carriage. This speed regulation is preferably carried out in real time so as to maintain the carriage in a predetermined vertical position, for example the initial position of the carriage, or at least in a zone defined between two predetermined vertical positions, for example a centered zone. on the initial position of the carriage, and whatever the phase of realization of the pile. Consequently, the invention makes it possible to prevent damage to the squeegee by controlling the vertical position of the carriage and also to prevent human intervention at the level of the potentially dangerous carriage by virtue of the fact that the squeegee can remain engaged. between turns for the duration of the operations.
Selon un mode de mise en œuvre de l'invention, en fonctionnement du dispositif de nettoyage lors d'une phase de bétonnage, le chariot est en position initiale, et la tarière est extraite du sol à une vitesse d'extraction verticale initiale prédéterminée et constante. Dans les conditions normales de fonctionnement, la racle présente une vitesse de rotation déterminée de telle sorte que la racle effectue un tour complet autour de la tarière lorsque cette dernière a avancé d'un pas de la pale hélicoïdale. Dans ces conditions, le chariot ne bouge pas.  According to one embodiment of the invention, during operation of the cleaning device during a concreting phase, the carriage is in the initial position, and the auger is extracted from the ground at a predetermined initial vertical extraction speed and constant. Under normal operating conditions, the doctor blade has a rotational speed determined so that the doctor blade performs a complete revolution around the auger when the latter has advanced one step of the helical blade. In these conditions, the truck does not move.
Cependant, la vitesse d'extraction de la tarière n'est pas nécessairement constante.  However, the extraction speed of the auger is not necessarily constant.
En cas de diminution de la vitesse d'extraction verticale de la tarière, par exemple due à une résistance du terrain ou bien à une baisse de la pression d'injection du béton, on comprend que, à l'issue d'une rotation de 360° autour de la tarière entre les spires inférieure et supérieure, la tarière s'est déplacée longitudinalement d'une longueur inférieure à un pas de la pale. Il s'ensuit que la racle se déplace longitudinalement vers l'extrémité inférieure du mât, entraînant le déplacement du chariot par rapport à sa position initiale vers l'extrémité inférieure du mât.  In the event of a decrease in the vertical extraction speed of the auger, for example due to a resistance of the ground or to a drop in the injection pressure of the concrete, it is understood that, after a rotation of 360 ° around the auger between the lower and upper turns, the auger has moved longitudinally less than one pitch of the blade. It follows that the squeegee moves longitudinally towards the lower end of the mast, causing the carriage to move relative to its initial position towards the lower end of the mast.
Selon l'invention, le déplacement du chariot vers l'extrémité inférieure est déterminé par l'organe de mesure et la vitesse de rotation de la racle est régulée en fonction de ce déplacement du chariot. Dans ce cas, la vitesse de rotation de la racle est diminuée, par exemple de manière à stopper ou à tout le moins ralentir le déplacement vertical du chariot vers l'extrémité inférieure du mât. Grâce à cette régulation de vitesse de rotation de la racle, on évite que le chariot n'atteigne l'extrémité inférieure du mât ou une éventuelle butée inférieure, ce qui pourrait provoquer un endommagement de la racle.  According to the invention, the movement of the carriage towards the lower end is determined by the measuring member and the speed of rotation of the doctor blade is regulated as a function of this movement of the carriage. In this case, the speed of rotation of the doctor blade is decreased, for example so as to stop or at least slow down the vertical movement of the carriage towards the lower end of the mast. With this speed control of rotation of the doctor blade, it is avoided that the carriage reaches the lower end of the mast or a possible lower stop, which could cause damage to the doctor blade.
Inversement, en cas d'augmentation de la vitesse d'extraction verticale de la tarière, par exemple due à une augmentation de la pression d'injection du béton, on comprend que, à l'issue d'une rotation de 360° de la racle autour de la tarière entre les spires inférieure et supérieure, la tarière a avancé de plus d'un pas de sorte que la racle est entraînée par la tarière vers l'extrémité supérieure du mât. Il s'ensuit que le chariot est également entraîné par la tarière vers l'extrémité supérieure du mât. Le chariot se déplace alors par rapport à sa position initiale en se dirigeant vers l'extrémité supérieure mât. Conversely, in the event of an increase in the vertical extraction speed of the auger, for example due to an increase in the injection pressure of the concrete, it is understood that, after a rotation of 360 ° of the squeegee around the auger between the lower and upper turns, the auger has advanced more than one step so that the squeegee is driven by the auger towards the upper end of the mast. It follows that the carriage is also driven by the auger towards the upper end of the mast. The carriage then moves from its initial position towards the upper mast end.
Selon l'invention, le déplacement du chariot est déterminé par l'organe de mesure et la vitesse de rotation de la racle est régulée en fonction du déplacement du chariot. Dans ce cas, la vitesse de rotation de la racle est augmentée, par exemple de manière à stopper ou ralentir le déplacement vertical du chariot vers l'extrémité supérieure du mât. Grâce à cette régulation de vitesse, on évite que le chariot n'atteigne l'extrémité supérieure du mât ou une éventuelle butée supérieure, ce qui pourrait provoquer un endommagement de la racle.  According to the invention, the displacement of the carriage is determined by the measuring member and the speed of rotation of the doctor blade is regulated as a function of the movement of the carriage. In this case, the speed of rotation of the doctor blade is increased, for example so as to stop or slow down the vertical movement of the carriage towards the upper end of the mast. Thanks to this speed regulation, it prevents the carriage from reaching the upper end of the mast or a possible upper stop, which could cause damage to the doctor blade.
Par « détermination du déplacement du chariot par rapport à sa position initiale», on entend que l'organe de mesure est configuré pour mesurer le déplacement du chariot par rapport à sa position initiale, ou à tout le moins détecter un déplacement du chariot vers l'extrémité supérieure ou l'extrémité inférieure du mât.  By "determining the movement of the carriage relative to its initial position" is meant that the measuring member is configured to measure the displacement of the carriage from its initial position, or at least to detect a movement of the carriage towards the upper end or the lower end of the mast.
Selon un mode de réalisation préférentiel, le dispositif de régulation de vitesse est configuré pour modifier la vitesse de rotation de la racle en fonction du déplacement du chariot par rapport à la position initiale, de façon à ramener le chariot vers la position initiale lors d'un déplacement du chariot par rapport à la position initiale.  According to a preferred embodiment, the speed control device is configured to change the speed of rotation of the doctor blade according to the movement of the carriage relative to the initial position, so as to bring the carriage back to the initial position when a displacement of the carriage relative to the initial position.
Selon une variante, le dispositif de régulation de vitesse est configuré pour modifier la vitesse de rotation de la racle en fonction du déplacement du chariot par rapport à la position initiale, de façon à ramener le chariot dans une zone située autour de la position initiale lors d'un déplacement du chariot hors de ladite zone.  According to one variant, the speed control device is configured to modify the speed of rotation of the doctor blade as a function of the displacement of the carriage relative to the initial position, so as to bring the carriage back to a zone situated around the initial position during a movement of the carriage out of said area.
Le dispositif de régulation de vitesse permet donc de maintenir le chariot sensiblement dans sa position initiale, quelles que soient les variations, positives ou négatives, de la vitesse d'extraction verticale de la tarière. On s'assure ainsi que le chariot reste toujours éloigné des éventuelles butées inférieure et supérieure.  The speed control device thus makes it possible to maintain the carriage substantially in its initial position, whatever the variations, positive or negative, of the vertical extraction speed of the auger. This ensures that the carriage remains always away from any lower and upper stops.
Avantageusement, le dispositif de régulation de vitesse est configuré pour augmenter la vitesse de rotation de la racle lorsque le chariot se déplace vers une extrémité supérieure du mât. On comprend que, selon son amplitude, l'augmentation de la vitesse de rotation de la racle a pour effet de ralentir ou stopper le déplacement du chariot vers l'extrémité supérieure, voire d'entraîner le chariot vers l'extrémité inférieure du mât si la vitesse de rotation de la racle est supérieure au ratio vitesse d'extraction sur pas de la pale hélicoïdale. Cette augmentation de vitesse de rotation de la racle est préférentiel lement initiée lorsque le déplacement du chariot, tel que déterminé par l'organe de mesure, est supérieur à un premier seuil prédéterminé. Advantageously, the speed regulating device is configured to increase the speed of rotation of the doctor blade when the carriage moves to an upper end of the mast. It is understood that, depending on its amplitude, the increase in the rotational speed of the doctor blade has the effect of slowing down or stopping the movement of the carriage towards the upper end, or even driving the carriage towards the lower end of the mast if the rotational speed of the doctor blade is greater than the ratio of the extraction speed on the pitch of the helical blade. This increase in rotational speed of the doctor blade is preferably initiated when the displacement of the carriage, as determined by the measuring member, is greater than a first predetermined threshold.
Avantageusement, le dispositif de régulation de vitesse est configuré pour diminuer la vitesse de rotation de la racle lorsque le chariot se déplace vers une extrémité inférieure du mât. On comprend que, selon son amplitude, la diminution de la vitesse de rotation de la racle a pour effet de ralentir ou stopper le déplacement du chariot vers l'extrémité inférieure du mât, voire de déplacer le chariot vers l'extrémité supérieure du mât si la vitesse de rotation de la racle est inférieure au ratio vitesse d'extraction sur pas de la pale hélicoïdale.  Advantageously, the speed control device is configured to decrease the speed of rotation of the doctor blade when the carriage moves towards a lower end of the mast. It is understood that, according to its amplitude, the decrease in the rotational speed of the doctor blade has the effect of slowing or stopping the movement of the carriage towards the lower end of the mast, or even to move the carriage towards the upper end of the mast if the speed of rotation of the doctor blade is lower than the ratio of the extraction speed on the pitch of the helical blade.
Cette diminution de vitesse de rotation de la racle peut être initiée lorsque le déplacement du chariot, tel que déterminé par l'organe de mesure, est supérieur à un second seuil prédéterminé.  This reduction in rotational speed of the doctor blade can be initiated when the displacement of the carriage, as determined by the measuring element, is greater than a second predetermined threshold.
Avantageusement, mais non exclusivement, le dispositif de régulation de vitesse est configuré de sorte que la valeur de la vitesse de rotation de la racle soit fonction de la valeur du déplacement du chariot déterminée par l'organe de mesure.  Advantageously, but not exclusively, the speed regulating device is configured so that the value of the speed of rotation of the doctor blade is a function of the value of the movement of the carriage determined by the measuring member.
Avantageusement, la vitesse de rotation de la racle est une fonction croissante de la valeur de déplacement du chariot, considéré à partir de la position initiale vers l'extrémité supérieure du mât. Autrement dit, la vitesse de rotation de la racle augmente de plus en plus à mesure que le chariot se rapproche de l'extrémité supérieure du mât. Inversement, la vitesse de rotation de la racle diminue de plus en plus à mesure que le chariot se rapproche de l'extrémité inférieure du mât.  Advantageously, the speed of rotation of the doctor blade is an increasing function of the displacement value of the carriage, considered from the initial position towards the upper end of the mast. In other words, the speed of rotation of the squeegee increases more and more as the carriage approaches the upper end of the mast. Conversely, the speed of rotation of the doctor blade decreases more and more as the carriage approaches the lower end of the mast.
Encore de préférence, le dispositif de régulation de vitesse est configuré de telle sorte que la vitesse de rotation de la racle soit une fonction croissante linéaire du déplacement du chariot le long du mât.  Still preferably, the speed regulating device is configured such that the speed of rotation of the doctor blade is a linear increasing function of the movement of the carriage along the mast.
Avantageusement, ledit organe de mesure est disposé entre le chariot et le mât. De préférence, l'organe de mesure comporte au moins un vérin disposé entre le corps et le mât, le déplacement du chariot étant déterminé à partir de la variation de longueur du vérin. Advantageously, said measuring member is disposed between the carriage and the mast. Preferably, the measuring member comprises at least one jack disposed between the body and the mast, the displacement of the carriage being determined from the variation in length of the jack.
De préférence, l'organe de mesure comporte un capteur de déplacement intégré au vérin.  Preferably, the measuring member comprises a displacement sensor integrated in the jack.
De préférence, le vérin est un vérin hydraulique.  Preferably, the jack is a hydraulic cylinder.
On comprend par ailleurs que les fins de course haute et basse du vérin constituent des butées inférieure et supérieure pour le chariot.  It is also understood that the high and low stroke end of the cylinder constitute lower and upper stops for the carriage.
Le poids du dispositif de nettoyage de tarière étant croissant avec l'augmentation des diamètres des tarières, la racle, qui prend généralement appui sur la spire inférieure, subit des efforts importants susceptibles de l'endommager sérieusement.  The weight of the auger cleaning device is increasing with increasing auger diameters, the squeegee, which generally bears on the lower turn, undergoes significant efforts that could seriously damage it.
Pour résoudre ce problème, selon un autre aspect avantageux de l'invention, le dispositif de nettoyage comporte en outre un dispositif de régulation de force pour réguler la force appliquée par la racle sur la spire inférieure. Avantageusement, le dispositif de régulation de force est configuré pour exercer sur le chariot une force de portance contrecarrant au moins en partie le poids du chariot, de façon à réduire la force exercée par la racle sur la spire inférieure tout en s'assurant que la racle reste en appui contre la spire inférieure. Autrement dit, le module de la force de portance est égal à une fraction du poids du chariot.  To solve this problem, according to another advantageous aspect of the invention, the cleaning device further comprises a force regulating device for regulating the force applied by the doctor blade on the lower turn. Advantageously, the force regulating device is configured to exert on the carriage a lift force counteracting at least part of the weight of the carriage, so as to reduce the force exerted by the doctor blade on the lower coil while ensuring that the scraper remains in support against the lower turn. In other words, the modulus of the lift force is equal to a fraction of the weight of the carriage.
Selon un mode de réalisation avantageux, le dispositif de régulation de force est disposé entre le chariot et le mât.  According to an advantageous embodiment, the force regulation device is disposed between the carriage and the mast.
De préférence, le dispositif de régulation de force comporte au moins un actionneur disposé entre le corps et le mât, l'actionneur étant configuré pour exercer un effort de poussée sur le corps, ledit effort de poussée étant dirigé selon la direction longitudinale du mât, vers une extrémité supérieure du mât.  Preferably, the force regulation device comprises at least one actuator disposed between the body and the mast, the actuator being configured to exert a thrust force on the body, said thrust force being directed in the longitudinal direction of the mast, towards an upper end of the mast.
De préférence, l'actionneur comporte un vérin hydraulique.  Preferably, the actuator comprises a hydraulic cylinder.
Encore de préférence, le vérin hydraulique est alimenté à une pression de fluide hydraulique constante.  Still preferably, the hydraulic cylinder is fed at a constant hydraulic fluid pressure.
De manière préférentielle, l'organe de mesure comporte le vérin hydraulique de l'actionneur. Autrement dit, le vérin hydraulique disposé entre le mât et le chariot présente une double fonction avantageuse, à savoir déterminer le déplacement du chariot et réduire l'effort exercé par la racle sur la spire inférieure de la pale hélicoïdale de la tarière. Brève description des dessins Preferably, the measuring member comprises the hydraulic jack of the actuator. In other words, the hydraulic cylinder disposed between the mast and the carriage has an advantageous dual function, namely to determine the movement of the carriage and reduce the force exerted by the doctor blade on the lower turn of the helical blade of the auger. Brief description of the drawings
L'invention sera mieux comprise à la lecture de la description qui suit d'un mode de réalisation de l'invention donné à titre d'exemple non limitatif, en référence aux dessins annexés, sur lesquels :  The invention will be better understood on reading the following description of an embodiment of the invention given by way of non-limiting example, with reference to the appended drawings, in which:
- la figure 1 est une vue en perspective d'une machine de forage, conforme à l'invention, le chariot du dispositif de nettoyage étant en position initiale ;  - Figure 1 is a perspective view of a drilling machine according to the invention, the carriage of the cleaning device being in the initial position;
- la figure 2 illustre la machine de forage de la figure 1, le chariot étant en position haute ;  - Figure 2 illustrates the drilling machine of Figure 1, the carriage being in the high position;
- la figure 3 illustre la machine de forage de la figure 1, le chariot étant en position basse ;  - Figure 3 illustrates the drilling machine of Figure 1, the carriage being in the low position;
- la figure 4 illustre la machine de forage de la figure 1 ainsi que son dispositif de régulation de vitesse de la racle ; et  FIG. 4 illustrates the drilling machine of FIG. 1 as well as its device for regulating the speed of the doctor blade; and
- la figure 5 est un graphique illustrant la variation de la vitesse de rotation de racle en fonction du déplacement du chariot le long du mât.  - Figure 5 is a graph illustrating the variation of the doctor blade rotation speed as a function of the movement of the carriage along the mast.
Description détaillée de l'invention Detailed description of the invention
Sur les figures 1 à 4, on a illustré, de manière partielle, une machine de forage 10 conforme à la présente invention.  In Figures 1 to 4, there is illustrated, partially, a drilling machine 10 according to the present invention.
La machine de forage 10 est destinée à réaliser des forages, et notamment des pieux dans le sol. Ce type de machine de forage à tarière étant déjà connu par ailleurs, seuls les éléments nécessaires à la compréhension de l'invention seront décrits ici.  The drilling machine 10 is intended for drilling, and in particular piles in the ground. As this type of auger drilling machine is already known, only the elements necessary for understanding the invention will be described here.
On pourra également se référer au document FR 2 563 861 qui décrit un exemple d'une telle machine de forage.  Reference may also be made to document FR 2 563 861 which describes an example of such a drilling machine.
La machine de forage 10 comporte un mât 12 qui présente une direction longitudinale L ; dans cet exemple, la direction longitudinale L est verticale.  The drilling machine 10 comprises a mast 12 which has a longitudinal direction L; in this example, the longitudinal direction L is vertical.
La machine de forage 10 comporte par ailleurs une tarière 14 ayant un axe longitudinal A parallèle à la direction longitudinale L.  The drilling machine 10 further comprises an auger 14 having a longitudinal axis A parallel to the longitudinal direction L.
La tarière 14 comprend un tube creux 16 qui s'étend selon l'axe longitudinal A, ce tube étant fixé à et entouré par une pale hélicoïdale 18.  The auger 14 comprises a hollow tube 16 which extends along the longitudinal axis A, this tube being fixed to and surrounded by a helical blade 18.
Par souci de lisibilité, seule une portion de tarière est représentée en figures 1 à 4. Bien entendu, la tarière peut être composée de plusieurs portions fixées bout à bout. La pale hélicoïdale présente un diamètre extérieur D. For the sake of readability, only an auger portion is shown in Figures 1 to 4. Of course, the auger may be composed of several portions fixed end to end. The helical blade has an outer diameter D.
De façon connue par ailleurs, la machine de forage 10 comporte également un dispositif de déplacement (non illustré ici) pour déplacer la tarière 14 par rapport au mât 12 en translation selon la direction longitudinale L.  In a manner known moreover, the drilling machine 10 also comprises a displacement device (not shown here) to move the auger 14 relative to the mast 12 in translation along the longitudinal direction L.
Ce dispositif de déplacement est notamment actionné lors de l'étape de forage et pour visser la tarière dans le sol, et lors de l'étape d'extraction de la tarière hors du sol. Comme mentionné ci-dessus, l'extraction de la tarière hors du sol, qui intervient après l'opération de forage, consiste en une translation verticale sans rotation.  This displacement device is notably actuated during the drilling step and to screw the auger into the ground, and during the extraction step of the auger out of the ground. As mentioned above, the extraction of the auger from the ground, which occurs after the drilling operation, consists of a vertical translation without rotation.
Dans la suite de la description, la vitesse de déplacement vertical de la tarière sera notée V. La machine de forage 10 comporte par ailleurs un dispositif de nettoyage 20 de la tarière 14 dont la fonction est d'évacuer les déblais logés entre les spires de la pale hélicoïdale lors de l'extraction de la tarière.  In the rest of the description, the vertical displacement speed of the auger will be noted V. The drilling machine 10 further comprises a device 20 for cleaning the auger 14 whose function is to evacuate the cuttings housed between the turns of the auger. the helical blade during extraction of the auger.
Le dispositif de nettoyage 20 comporte un chariot 22 qui présente la forme générale d'un tambour traversé axialement par la tarière 14. Le chariot 22 présente donc un diamètre légèrement plus grand que le diamètre D de la pale hélicoïdale 18.  The cleaning device 20 comprises a carriage 22 which has the general shape of a drum traversed axially by the auger 14. The carriage 22 thus has a diameter slightly larger than the diameter D of the helical blade 18.
Le chariot 22 est monté au mât 12 de façon coulissante selon la direction longitudinale L du mât 12. Pour ce faire, dans cet exemple non limitatif, le chariot est monté sur des glissières fixées le long du mât.  The carriage 22 is slidably mounted to the mast 12 in the longitudinal direction L of the mast 12. To this end, in this nonlimiting example, the carriage is mounted on rails fixed along the mast.
Le chariot comporte un corps 24 de forme cylindrique qui entoure la tarière.  The carriage comprises a body 24 of cylindrical shape which surrounds the auger.
Comme il sera expliqué plus en détaillé ci-dessous, le corps 24 est supporté par une paire de vérins hydrauliques 30 disposés entre le mât et le chariot.  As will be explained in more detail below, the body 24 is supported by a pair of hydraulic cylinders 30 disposed between the mast and the carriage.
Le dispositif de nettoyage 20 comporte par ailleurs une racle 40 qui est disposée en dessous du corps 24. La racle est montée sur un tambour interne 26 du dispositif de nettoyage 20, le tambour interne 26 étant disposé coaxialement à l'intérieur du corps 24. Lors de l'extraction sans rotation, la racle s'étend entre une spire inférieure 18a et une spire supérieure 18b de la pale hélicoïdale 18 afin d'évacuer les déblais se trouvant entre les deux spires. Dans cet exemple avantageux, la racle reste engagée entre les deux spires pendant les autres mouvements de la tarière, notamment pendant les phases de forage. Dans cet exemple, la racle présente la forme d'une plaque ayant une hauteur H sensiblement égale à la distance axiale entre la spire inférieure 18a et la spire supérieure 18b. The cleaning device 20 further comprises a doctor blade 40 which is disposed below the body 24. The doctor blade is mounted on an inner drum 26 of the cleaning device 20, the inner drum 26 being arranged coaxially inside the body 24. During extraction without rotation, the doctor blade extends between a lower turn 18a and an upper turn 18b of the helical blade 18 in order to evacuate the cuttings lying between the two turns. In this advantageous example, the doctor blade remains engaged between the two turns during the other movements of the auger, especially during the drilling phases. In this example, the doctor blade has the shape of a plate having a height H substantially equal to the axial distance between the lower turn 18a and the upper turn 18b.
Le dispositif de nettoyage 20 comporte par ailleurs un moteur 28 pour entraîner en rotation le tambour intérieur 26 avec la racle 24 autour de l'axe longitudinal A.  The cleaning device 20 further comprises a motor 28 for rotating the inner drum 26 with the doctor blade 24 about the longitudinal axis A.
On comprend que l'actionnement du moteur 28 a pour effet de faire tourner la racle 40 par rapport au corps 24 autour du tube creux.  It is understood that the actuation of the motor 28 has the effect of rotating the doctor blade 40 relative to the body 24 around the hollow tube.
En conséquence, la racle tourne autour de l'axe de rotation A de la tarière tout en s'étendant entre la spire inférieure 18a et la spire supérieure 18b, ce qui permet d'évacuer les déblais logés entre la spire inférieure et la spire supérieure.  As a result, the doctor blade rotates about the axis of rotation A of the auger while extending between the lower turn 18a and the upper turn 18b, which makes it possible to evacuate the cuttings housed between the lower turn and the upper turn. .
La racle 40 est préférentiellement montée sur le tambour 26 de manière pivotante de manière à pouvoir dégager la racle à l'extérieur du volume de la tarière lorsqu'on visse la tarière dans le sol lors de l'opération de forage.  The squeegee 40 is preferably mounted on the drum 26 pivotally so as to release the squeegee outside the volume of the auger when screwing the auger in the soil during the drilling operation.
Sur les figures 1 à 3, on a représenté un axe Z vertical qui s'étend parallèlement à la direction longitudinale L du mât et qui est orienté vers une extrémité supérieure 12a du mât. La référence Z0 correspond à la position initiale du chariot 22 illustrée en figure 1. In Figures 1 to 3, there is shown a vertical axis Z which extends parallel to the longitudinal direction L of the mast and which is oriented towards an upper end 12a of the mast. The reference Z 0 corresponds to the initial position of the carriage 22 illustrated in FIG.
Sur ces figures, qui illustrent un mode de mise en œuvre non limitatif de l'invention, à savoir une phase de bétonnage, la tarière est en phase d'extraction sans rotation, de sorte que la vitesse de déplacement verticale de la tarière correspond à la vitesse d'extraction verticale.  In these figures, which illustrate a non-limiting embodiment of the invention, namely a concreting phase, the auger is in extraction phase without rotation, so that the vertical displacement speed of the auger corresponds to the vertical extraction speed.
En condition normale d'extraction sans rotation, la vitesse d'extraction verticale de la tarière est égale à V0, le chariot 22 se trouvant alors en sa position initiale Z0. In normal extraction condition without rotation, the vertical extraction speed of the auger is equal to V 0 , the carriage 22 then being in its initial position Z 0 .
Dans cet exemple, la vitesse de rotation ω0 initiale de la racle 40 autour de l'axe de rotation A est réglée pour être égale à Vo/p où p est le pas de la pale hélicoïdale 18, de sorte que le chariot ne bouge pas verticalement lorsque la vitesse d'extraction sans rotation de la tarière est égale à V0. Comme expliqué ci-dessus, si la vitesse V d'extraction verticale sans rotation de la tarière varie par rapport à sa vitesse initiale Vo, le chariot 22 sera entraîné par la tarière selon la direction longitudinale L, soit vers l'extrémité supérieure 12a du mât 12 si la vitesse d'extraction de la tarière Vi est supérieure à la vitesse initiale V0/ tel que cela est illustré en figure 2, soit vers l'extrémité inférieure 12b du mât 12 si la vitesse d'extraction verticale V2 la tarière est inférieure à la vitesse V0, tel qu'illustré en figure 3. In this example, the initial speed ω 0 of the doctor blade 40 about the axis of rotation A is set to be equal to Vo / p where p is the pitch of the helical blade 18, so that the carriage does not move. not vertically when the speed of extraction without rotation of the auger is equal to V 0 . As explained above, if the speed V of vertical extraction without rotation of the auger varies with respect to its initial velocity Vo, the carriage 22 will be driven by the auger in the longitudinal direction L, or towards the upper end 12a of the auger. mast 12 if the extraction speed of the auger Vi is greater than the initial speed V 0 / as illustrated in FIG. 2, or towards the lower end 12b of the mast 12 if the vertical extraction speed V2 the auger is less than the speed V 0 , as illustrated in FIG.
Conformément à l'invention, la machine de forage 10 comporte en outre un organe de mesure 50 pour déterminer un déplacement ΔΖ du chariot 22 le long du mât par rapport à la position initiale Z0 du chariot. On a donc ΔΖ= Z - Z0 According to the invention, the drilling machine 10 further comprises a measuring member 50 for determining a displacement ΔΖ of the carriage 22 along the mast relative to the initial position Z 0 of the carriage. So we have ΔΖ = Z - Z 0
Dans ce mode de réalisation non limitatif, l'organe de mesure 50 est disposé entre le chariot 22 et le mât 12. Il comporte le vérin hydraulique 30, de sorte que le déplacement du chariot 22 est déterminé à partir de la variation de la longueur du vérin 30.  In this non-limiting embodiment, the measuring member 50 is disposed between the carriage 22 and the mast 12. It comprises the hydraulic jack 30, so that the displacement of the carriage 22 is determined from the variation of the length of the cylinder 30.
Le vérin 30 comporte un capteur de déplacement 52 qui permet de mesurer la valeur du déplacement du chariot 22. Dans l'exemple de la figure 2, la vitesse d'extraction sans rotation est supérieure à V0 et Vi, le chariot 22 s'est déplacé vers l'extrémité supérieure 12a du mât d'une valeur ΔΖι jusqu'à atteindre la position sur l'axe Z. On comprend donc que ΔΖι= Zi - Z0. The jack 30 comprises a displacement sensor 52 which makes it possible to measure the value of the displacement of the carriage 22. In the example of FIG. 2, the extraction speed without rotation is greater than V 0 and Vi, the carriage 22 is is moved towards the upper end 12a of the mast of a value ΔΖι to reach the position on the Z axis. It is therefore understood that ΔΖι = Zi - Z 0 .
Dans le cas de la figure 3, la vitesse d'extraction sans rotation V2 est inférieure à V0 et le chariot 22 s'est déplacé vers l'extrémité inférieure 12a du mât 12 d'une distance ΔΖ2 pour atteindre la position Z2 située en-dessous de la position Z0. On comprend donc que ΔΖ2=Ζ2-Ζο, avec ΔΖ2<0. In the case of FIG. 3, the non-rotating extraction speed V 2 is less than V 0 and the carriage 22 has moved towards the lower end 12a of the mast 12 by a distance Δ 2 to reach the Z 2 position. below the Z 0 position. We therefore understand that ΔΖ2 = Ζ 2 -Ζο, with ΔΖ 2 <0.
Conformément à l'invention, le dispositif de nettoyage 20 comporte en outre un dispositif de régulation de vitesse 54, schématisé en figure 4 pour réguler la vitesse de rotation ω de la racle 40 en fonction du déplacement ΔΖ du chariot déterminé par l'organe de mesure.  According to the invention, the cleaning device 20 further comprises a speed control device 54, shown diagrammatically in FIG. 4 for regulating the speed of rotation ω of the doctor blade 40 as a function of the displacement ΔΖ of the carriage determined by the measured.
Dans cet exemple le dispositif de régulation de vitesse 54 est relié au capteur de déplacement 52, et commande le moteur 28 en lui fournissant une consigne de vitesse de rotation ω de la racle.  In this example, the speed control device 54 is connected to the displacement sensor 52, and controls the motor 28 by providing it with a speed reference ω of the doctor blade.
Dans ce mode de réalisation, le dispositif de régulation de vitesse In this embodiment, the speed control device
54 est configuré pour modifier la vitesse de rotation ω de la racle 40 en fonction du déplacement ΔΖ du chariot, de façon à ramener le chariot 22 vers la position initiale Z0 lors d'un déplacement du chariot par rapport à la position initiale Z0. Pour ce faire, le dispositif de régulation de vitesse 54 est configuré pour augmenter la vitesse de rotation ω de la racle 40 lorsque le chariot 22 se déplace vers l'extrémité supérieure 12a du mât 12. 54 is configured to change the speed of rotation ω of the blade 40 as a function of the displacement ΔΖ of the carriage, so as to bring the carriage 22 to the initial position Z 0 during a movement of the carriage relative to the initial position Z 0 . To do this, the speed control device 54 is configured to increase the speed of rotation ω of the doctor blade 40 when the carriage 22 moves towards the upper end 12a of the mast 12.
Dans l'exemple de la figure 2, l'organe de mesure 50 a déterminé que le chariot 22 s'est déplacé de la distance ΔΖι vers l'extrémité supérieure 12a du mât 12. En conséquence, le dispositif de régulation de vitesse 54 envoie la consigne de vitesse ωι au moteur 28 afin d'augmenter la vitesse de rotation de la racle 40.  In the example of FIG. 2, the measuring member 50 has determined that the carriage 22 has moved from the distance ΔΖι towards the upper end 12a of the mast 12. Consequently, the speed regulating device 54 sends the speed instruction ωι to the motor 28 in order to increase the speed of rotation of the doctor blade 40.
La vitesse de rotation ωι est strictement supérieure à la vitesse de rotation ω0 initiale. On expliquera ci-dessous comment est déterminée la vitesse ωι. The rotational speed ωι is strictly greater than the initial speed ω 0 . It will be explained below how the speed ωι is determined.
Inversement, le dispositif de régulation de vitesse 54 selon l'invention est configuré pour diminuer la vitesse de rotation ω de la racle 40 lorsque le chariot se déplace vers l'extrémité inférieure 12b du mât 12.  Conversely, the speed control device 54 according to the invention is configured to reduce the speed of rotation ω of the doctor blade 40 when the carriage moves towards the lower end 12b of the mast 12.
Dans l'exemple de la figure 3, l'organe de mesure 50 a déterminé que le chariot 22 s'est déplacé d'une distance ΔΖ2 depuis la position initiale Z0 vers l'extrémité inférieure 12b du mât 12. En conséquence, le dispositif de régulation de vitesse 54 diminue la vitesse de rotation ω de la racle 40 pour l'amener à la vitesse de rotation ω2 inférieure à la vitesse de rotation ω0 initiale. In the example of FIG. 3, the measuring member 50 has determined that the carriage 22 has moved by a distance ΔΖ 2 from the initial position Z 0 to the lower end 12b of the mast 12. Consequently, the speed control device 54 decreases the rotational speed ω of the doctor blade 40 to bring it to the speed of rotation ω 2 lower than the initial speed ω 0 .
Dans l'exemple illustré ici, le dispositif de régulation de vitesse 54 est configuré de telle sorte que la vitesse de rotation ω soit une fonction croissante linéaire du déplacement ΔΖ du chariot le long du mât. Sur le graphique de la figure 5, on a illustré la variation de vitesse de rotation Δω de la racle 40 en fonction de la position Z du chariot 22 par rapport à sa position initiale Z0. Dans cet exemple, on a : In the example illustrated here, the speed control device 54 is configured such that the rotational speed ω is a linear increasing function of the displacement ΔΖ of the carriage along the mast. In the graph of FIG. 5, the rotational speed variation Δω of the doctor blade 40 is illustrated as a function of the Z position of the carriage 22 with respect to its initial position Z 0 . In this example, we have:
ω = ίΰο + Δω  ω = ίΰο + Δω
Dans l'exemple des figures 2 et 3, α>ι = ωο + Δα>ι et ω2 = ωο + Δω2, avec Δωι>0 et Δω2<0 In the example of FIGS. 2 and 3, α> ι = ωο + Δα> ι and ω 2 = ωο + Δω 2 , with Δωι> 0 and Δω 2 <0
La courbe illustrée en figure 5 est une fonction linéaire croissante représentant la variation de vitesse en fonction du déplacement vertical du chariot par rapport à Z0. On a donc Δω = k* (Z-Zo), où k est le coefficient de proportionnalité. A titre d'exemple, le pas p de la pale est généralement compris entre 0,3 et 2 mètres, et la vitesse de remontée de la tarière peut varier entre 50 et 200 mètres par heure. The curve illustrated in FIG. 5 is an increasing linear function representing the variation of speed as a function of the vertical displacement of the carriage with respect to Z 0 . We thus have Δω = k * (Z-Zo), where k is the coefficient of proportionality. For example, the pitch p of the blade is generally between 0.3 and 2 meters, and the speed of ascent of the auger can vary between 50 and 200 meters per hour.
Les inventeurs ont réalisé plusieurs simulations numériques :  The inventors have realized several numerical simulations:
· Pour un pas égal à 1,5 m, on pourra choisir un coefficient k de l'ordre de 40 tours/minute/mètre;  · For a step equal to 1.5 m, we can choose a coefficient k of the order of 40 revolutions / minute / meter;
• Pour un pas égal à 1,2 m, on pourra choisir un coefficient k de l'ordre de 50 tours/minute/mètre;  • For a step equal to 1.2 m, we can choose a coefficient k of the order of 50 revolutions / minute / meter;
• Pour un pas égal à 0,3 m, on pourra choisir un coefficient k de l'ordre de 200 tours/minute/mètre.  • For a step equal to 0.3 m, we can choose a coefficient k of the order of 200 revolutions / minute / meter.
Ces exemples de valeurs de k permettent de s'assurer que la vitesse de rotation de la racle soit adaptée pour stopper l'éloignement du chariot 22 de sa position initiale Z0. D'autres valeurs de k pourront être choisies en fonction du pas de la pale. These examples of values of k make it possible to ensure that the speed of rotation of the doctor blade is adapted to stop the removal of the carriage 22 from its initial position Z 0 . Other values of k may be chosen according to the pitch of the blade.
Le dispositif peut également être paramétré de sorte que la vitesse ωι soit suffisante pour ramener le chariot 22 vers la position initiale Z0, ce déplacement étant illustré par la flèche Fl de la figure 2. Pour ce faire, la variation de vitesse de rotation Δωι sera déterminée en choisissant un coefficient k plus élevé que ceux proposés ci-dessus. On comprend notamment que le chariot reviendra vers sa position initiale si la vitesse d'extraction sans rotation fluctue autour de la valeur V0. The device can also be parameterized so that the speed ωι is sufficient to return the carriage 22 to the initial position Z 0 , this displacement being illustrated by the arrow F1 in FIG. 2. To do this, the rotation speed variation Δωι will be determined by choosing a coefficient k higher than those proposed above. It is understood in particular that the carriage will return to its initial position if the extraction speed without rotation fluctuates around the value V 0 .
De même, la variation de vitesse de rotation Δω2 pourra être calibrée de manière que le chariot 22 retourne vers sa position initiale Zo en cas de déplacement du chariot 22 vers l'extrémité inférieure 12b du mât 12, ce déplacement du chariot étant illustré par la flèche F2 sur la figure 3. Similarly, the rotational speed variation Δω 2 may be calibrated so that the carriage 22 returns to its initial position Zo when the carriage 22 is moved towards the lower end 12b of the mast 12, this displacement of the carriage being illustrated by the arrow F2 in FIG.
Comme illustré en figure 1, la racle 40 prend appui sur la spire inférieure 18a de la pale hélicoïdale 18. L'effort exercé par la racle 40 sur la spire inférieure 18a est constitué par le poids propre du chariot.  As illustrated in Figure 1, the doctor blade 40 bears on the lower turn 18a of the helical blade 18. The force exerted by the doctor blade 40 on the lower turn 18a is constituted by the self weight of the carriage.
Le dispositif de nettoyage comporte en outre un dispositif de régulation de force 60, schématisé en figure 1 pour réguler la force appliquée par la racle 40 sur la spire inférieure 18a. Ce dispositif de régulation de force 60 comporte le vérin hydraulique 30 disposé entre le chariot 22 et le mât 12.  The cleaning device further comprises a force control device 60, shown schematically in FIG. 1 for regulating the force applied by the doctor blade 40 on the lower turn 18a. This force regulation device 60 comprises the hydraulic cylinder 30 disposed between the carriage 22 and the mast 12.
Le vérin 30 constitue donc un actionneur 31 qui est disposé entre le corps et le mât en étant configuré pour exercer un effort de poussée T sur le corps 24. Cet effort de poussée étant, dans cet exemple, égal à une fraction du poids du chariot, en l'espèce 50% du poids du chariot 22. The jack 30 thus constitutes an actuator 31 which is arranged between the body and the mast being configured to exert a thrust force T on the body 24. This thrust force being, in this example, equal to a fraction of the weight of the carriage, in this case 50% of the weight of the carriage 22.
L'effort de poussée T est dirigé selon la direction longitudinale L du mât vers l'extrémité supérieure du mât 12.  The thrust force T is directed along the longitudinal direction L of the mast towards the upper end of the mast 12.
On comprend que cet effort de poussée T permet de diminuer l'effort de pression verticale exercée par la racle 40 sur la spire inférieure 18a. Pour ce faire, le vérin hydraulique 30 est alimenté à une pression de fluide hydraulique constante.  It is understood that this thrust force T reduces the vertical pressure force exerted by the doctor blade 40 on the lower turn 18a. To do this, the hydraulic cylinder 30 is fed at a constant hydraulic fluid pressure.
On comprend donc que, dans cet exemple avantageux, l'organe de mesure 50 comporte le vérin hydraulique 30 de l'actionneur 31.  It is therefore understood that, in this advantageous example, the measuring member 50 comprises the hydraulic jack 30 of the actuator 31.
Comme mentionné ci-dessus, on comprend que le dispositif de régulation de vitesse 54 selon l'invention est également apte à réguler la vitesse de rotation de la racle 40 lors d'une phase d'extraction verticale de la tarière 14 avec rotation, quelle que soit son sens de rotation.  As mentioned above, it is understood that the speed control device 54 according to the invention is also able to regulate the speed of rotation of the doctor blade 40 during a vertical extraction phase of the auger 14 with rotation, which whatever its direction of rotation.
Le dispositif de régulation de vitesse de la racle 40 est également apte à réguler la vitesse de la racle lors de la phase de forage, c'est-à-dire lors d'un déplacement vertical descendant de la tarière avec rotation, correspondant à un mouvement de vissage de la tarière dans le sol.  The speed control device of the blade 40 is also able to regulate the speed of the doctor blade during the drilling phase, that is to say during a vertical downward movement of the auger with rotation, corresponding to a screwing movement of the auger into the ground.
Le dispositif de régulation est également apte à réguler la vitesse de rotation de la racle 40 lors d'une rotation de la tarière, sans déplacement vertical de cette dernière, afin de corriger un déplacement du chariot 22 qui pourrait résulter d'une variation de la vitesse de rotation de la tarière 14.  The regulating device is also able to regulate the speed of rotation of the doctor blade 40 during a rotation of the auger, without vertical displacement of the latter, in order to correct a displacement of the carriage 22 which could result from a variation of the rotational speed of the auger 14.

Claims

REVENDICATIONS
1. Machine de forage (10) comportant : A drilling machine (10) comprising:
un mât (12) ayant une direction longitudinale (L); une tarière (14) ayant un axe longitudinal (A) parallèle à la direction longitudinale(L) et comprenant une pale hélicoïdale ;  a mast (12) having a longitudinal direction (L); an auger (14) having a longitudinal axis (A) parallel to the longitudinal direction (L) and comprising a helical blade;
un dispositif de déplacement pour déplacer la tarière (14) par rapport au mât (12) en translation selon la direction longitudinale (L);  a displacement device for moving the auger (14) relative to the mast (12) in translation in the longitudinal direction (L);
un dispositif de nettoyage (20) de la tarière (14) comprenant un chariot (22) monté au mât (12) de façon coulissante selon la direction longitudinale (L) du mât (12), le chariot comportant un corps (24) entourant la tarière et une racle (40) montée au corps de façon rotative autour d'un axe de rotation (R) parallèle à la direction longitudinale (L), la racle s'étendant entre une spire inférieure (18a) et une spire supérieure (18b) de la pale hélicoïdale; caractérisée en ce que la machine de forage (10) comporte en outre un organe de mesure (50) pour déterminer le déplacement (ΔΖ, ΔΖι, ΔΖ2) du chariot (22) le long du mât (12) par rapport à une position initiale (Z0) dudit chariot, et en ce que le dispositif de nettoyage (20) comporte en outre un dispositif de régulation de vitesse pour réguler la vitesse (54) de rotation (ω) de la racle (40) en fonction dudit déplacement (ΔΖ,ΔΖι,ΔΖ2) du chariot. a cleaning device (20) for the auger (14) comprising a carriage (22) slidably mounted on the mast (12) in the longitudinal direction (L) of the mast (12), the carriage comprising a body (24) surrounding the auger and a squeegee (40) rotatably mounted to the body about an axis of rotation (R) parallel to the longitudinal direction (L), the squeegee extending between a lower turn (18a) and an upper turn ( 18b) of the helical blade; characterized in that the drilling machine (10) further comprises a measuring member (50) for determining the displacement (ΔΖ, ΔΖι, ΔΖ 2 ) of the carriage (22) along the mast (12) with respect to a position initial (Z 0 ) of said carriage, and in that the cleaning device (20) further comprises a speed regulating device for regulating the speed (54) of rotation (ω) of the doctor blade (40) according to said displacement (ΔΖ, ΔΖι, ΔΖ 2 ) of the carriage.
2. Machine de forage selon la revendication 1, caractérisée en ce que le dispositif de régulation de vitesse (54) est configuré pour modifier la vitesse de rotation (ω) de la racle (40) en fonction du déplacement (ΔΖ,ΔΖι,ΔΖ2) du chariot (22) par rapport à la position initiale de façon à ramener le chariot vers la position initiale (Zo) lors d'un déplacement (ΔΖ,ΔΖι,ΔΖ2) du chariot (22) par rapport à la position initiale (Z0). 2. Drilling machine according to claim 1, characterized in that the speed regulating device (54) is configured to change the rotational speed (ω) of the doctor blade (40) as a function of the displacement (ΔΖ, ΔΖι, ΔΖ 2 ) of the carriage (22) relative to the initial position so as to bring the carriage to the initial position (Zo) during a displacement (ΔΖ, ΔΖι, ΔΖ 2 ) of the carriage (22) relative to the initial position (Z 0 ).
3. Machine de forage selon la revendication 1 ou 2, caractérisée en ce que le dispositif de régulation de vitesse (54) est configuré pour augmenter la vitesse de rotation (ω,ωι,ω2) de la racle lorsque le chariot se déplace vers une extrémité supérieure du mât (12). Drilling machine according to claim 1 or 2, characterized in that the speed regulating device (54) is configured to increase the speed of rotation (ω, ωι, ω 2 ) of the doctor blade when the carriage moves towards an upper end of the mast (12).
4. Machine de forage selon l'une quelconque des revendications précédentes, caractérisée en ce que le dispositif de régulation de vitesse (54) est configuré pour diminuer la vitesse de rotation de la racle (40) lorsque le chariot se déplace vers une extrémité inférieure (12b) du mât (12). Drilling machine according to one of the preceding claims, characterized in that the speed regulating device (54) is configured to decrease the speed of rotation of the doctor blade (40) when the carriage moves to a lower end. (12b) of the mast (12).
5. Machine de forage selon l'une quelconque des revendications précédentes, caractérisée en ce que le dispositif de régulation de vitesse (54) est configuré de telle sorte que la vitesse de rotation (ω) soit une fonction croissante linéaire (f) du déplacement (ΔΖ) du chariot le long du mât par rapport à la position initiale (Z0). Drilling machine according to one of the preceding claims, characterized in that the speed regulating device (54) is configured in such a way that the rotational speed (ω) is a linear increasing function (f) of the displacement (ΔΖ) of the carriage along the mast relative to the initial position (Z 0 ).
6. Machine de forage selon l'une quelconque des revendications précédentes, caractérisée en ce que ledit organe de mesure est disposé entre le chariot (22) et le mât (12). 6. Drilling machine according to any one of the preceding claims, characterized in that said measuring member is disposed between the carriage (22) and the mast (12).
7. Machine de forage selon la revendication 6, caractérisée en ce que l'organe de mesure (50) comporte au moins un vérin (30) disposé entre le corps et le mât, le déplacement du chariot (22) étant déterminé à partir de la variation de longueur du vérin (30). 7. Drilling machine according to claim 6, characterized in that the measuring member (50) comprises at least one jack (30) disposed between the body and the mast, the displacement of the carriage (22) being determined from the length variation of the jack (30).
8. Machine de forage selon l'une quelconque des revendications précédentes, caractérisée en ce que la racle (40) prend appui sur la spire inférieure (18a), et en ce que le dispositif de nettoyage comporte en outre un dispositif de régulation de force (60) pour réguler la force appliquée par la racle (40) sur la spire inférieure (18a). 8. Drilling machine according to any one of the preceding claims, characterized in that the squeegee (40) is supported on the lower turn (18a), and in that the cleaning device further comprises a force control device (60) for regulating the force applied by the doctor blade (40) to the lower turn (18a).
9. Machine de forage selon la revendication 8, caractérisée en ce que le dispositif de régulation de force (60) est disposé entre le chariot et le mât. 9. Drilling machine according to claim 8, characterized in that the force regulating device (60) is disposed between the carriage and the mast.
10. Machine de forage selon la revendication 9, caractérisée en ce que le dispositif de régulation de force comporte au moins un actionneur (31) disposé entre le corps et le mât, l'actionneur étant configuré pour exercer un effort de poussée (T) sur le corps (24), ledit effort de poussée (T) étant dirigé selon la direction longitudinale (L) du mât, vers une extrémité supérieure du mât (12). 10. Drilling machine according to claim 9, characterized in that the force regulating device comprises at least one actuator (31) disposed between the body and the mast, the actuator being configured to exert a thrust force (T) on the body (24), said thrust force (T) being directed in the longitudinal direction (L) of the mast, towards an upper end of the mast (12).
11. Machine de forage selon la revendication 10, caractérisée en ce que l'actionneur (31) comporte un vérin hydraulique. 11. Drilling machine according to claim 10, characterized in that the actuator (31) comprises a hydraulic cylinder.
12. Machine de forage selon la revendication 11, caractérisée en ce que le vérin hydraulique (30) est alimenté à une pression de fluide hydraulique constante. 12. Drilling machine according to claim 11, characterized in that the hydraulic cylinder (30) is fed at a constant hydraulic fluid pressure.
13. Machine de forage selon l'une ou l'autre des revendications 11 et 12, caractérisée en ce que l'organe de mesure (50) comporte le vérin hydraulique (30) de l'actionneur (31). 13. Drilling machine according to any one of claims 11 and 12, characterized in that the measuring member (50) comprises the hydraulic cylinder (30) of the actuator (31).
EP17822403.6A 2016-12-12 2017-12-12 Drilling machine comprising an auger and device for cleaning the auger Active EP3551829B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1662315A FR3060048B1 (en) 2016-12-12 2016-12-12 DRILLING MACHINE INCLUDING A AUGER AND A AUGER CLEANING DEVICE
PCT/FR2017/053511 WO2018109356A1 (en) 2016-12-12 2017-12-12 Drilling machine comprising an auger and device for cleaning the auger

Publications (2)

Publication Number Publication Date
EP3551829A1 true EP3551829A1 (en) 2019-10-16
EP3551829B1 EP3551829B1 (en) 2020-10-28

Family

ID=58228221

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17822403.6A Active EP3551829B1 (en) 2016-12-12 2017-12-12 Drilling machine comprising an auger and device for cleaning the auger

Country Status (4)

Country Link
EP (1) EP3551829B1 (en)
ES (1) ES2841336T3 (en)
FR (1) FR3060048B1 (en)
WO (1) WO2018109356A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113944433B (en) * 2021-10-29 2022-12-16 中国一冶集团有限公司 Drill rod mud scraping device and using method
CN114151019B (en) * 2021-11-24 2024-03-29 深圳市工勘岩土集团有限公司 Pushing type slag discharging noise reduction structure of rotary drilling bucket
CN117489263B (en) * 2023-10-10 2024-05-14 浙江恒悦机械有限公司 Ground auger for building foundation and use method thereof

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2563861B1 (en) 1984-05-03 1986-08-29 Soletanche DEVICE FOR CLEANING AUGER BITS.
DE69002583T2 (en) * 1989-11-10 1993-11-25 Dawson Const Plant Ltd Cleaner for augers.
ITUD20020117A1 (en) * 2002-05-30 2003-12-01 Casagrande Spa CLEANING DEVICE FOR PROPELLER TOOLS AND CLEANING PROCEDURE OF A PROPELLER TOOL ADOPTING SUCH DEVICE
GB2414998B (en) * 2004-06-10 2008-04-16 Cementation Found Skanska Ltd Auger cleaner
ITMI20122264A1 (en) * 2012-12-28 2014-06-29 Soilmec Spa ELICA CLEANER DEVICE TO REMOVE FROM A SCREW TOOL, EXCAVATION MACHINE PROVIDING SUCH A CLEANER AND USING THIS EXCAVATION MACHINE

Also Published As

Publication number Publication date
FR3060048B1 (en) 2020-12-11
FR3060048A1 (en) 2018-06-15
ES2841336T3 (en) 2021-07-08
WO2018109356A1 (en) 2018-06-21
EP3551829B1 (en) 2020-10-28

Similar Documents

Publication Publication Date Title
EP3551829B1 (en) Drilling machine comprising an auger and device for cleaning the auger
FR2563861A1 (en) DEVICE FOR CLEANING TARRIES.
EP1748108B1 (en) Auger for piling
CA1080190A (en) Method for storing a flexible elongated element in a basket rotating around a vertical axis
EP3645823A1 (en) Vertical drilling system of the auger type provided with a trajectory correction device
FR2566813A1 (en) Device and method for producing concrete piles in the ground and piles obtained by this method
EP3077599B1 (en) Concreting facility and corresponding concreting method
EP1605242A1 (en) System for the use of an apparatus for taking samples in the ground or a granular or pulverulent material
FR2642777A1 (en) DEVICE FOR EXECUTION TO CONTINUOUS HONEYMOUS HOLLOWING MOLDED PILES IN SOIL
FR2753231A1 (en) DRILLING METHOD AND APPARATUS
WO2015140468A1 (en) Boring and concreting equipment for producing a concrete pile in the ground, and corresponding method
FR2854179A1 (en) ERGOT AUGER SYSTEM
EP1270869A1 (en) Drilling and pressing tool
EP2631367B1 (en) Drilling machine for manufacturing posts including a penetrometric probe
EP1411177B1 (en) Process and apparatus for assessment of the bearing capacity of an object inserted into the ground through vibration
FR3051218A1 (en) TELESCOPABLE TOOL DRILLING DEVICE.
WO1998027445A1 (en) Device for underground reconnaissance
WO2014068071A1 (en) Method for carrying out geotechnical testing
EP1186568B1 (en) Elevating work platform and control method for a load carried thereon
WO2002008563A1 (en) Method and device for rotary well drilling
BE876794R (en) AUTOMATIC CONTROL UNIT FOR DIAMOND SAWING MACHINE
FR2635129A1 (en) Improvements to devices and methods for making concrete piles in the ground.
BE878215A (en) METHOD AND DEVICE FOR FORMING CONCRETE PILES MOLDED IN THE SOIL, BY MEANS OF A AUGER
FR2977172A1 (en) Operating device for operating hose in service position in assembly for cleaning drain pipe in building, has coupling member including rollers movable towards and away from pulley, so as to exert variable pressure of hose on pulley
FR3050226B1 (en) DEVICE FOR MEASURING THE CURRENT AXIS POSITION OF A MOBILE MODULE IN TRANSLATION FOLLOWING A VISIBLE AXIS OF A FIXED STRUCTURE

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20190527

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

RIC1 Information provided on ipc code assigned before grant

Ipc: B08B 1/00 20060101ALI20200515BHEP

Ipc: E21B 12/06 20060101AFI20200515BHEP

INTG Intention to grant announced

Effective date: 20200616

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1328410

Country of ref document: AT

Kind code of ref document: T

Effective date: 20201115

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602017026527

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: FRENCH

REG Reference to a national code

Ref country code: NL

Ref legal event code: FP

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210128

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210129

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210301

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201028

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201028

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201028

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210228

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201028

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201028

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210128

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201028

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2841336

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20210708

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602017026527

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201028

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201028

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201028

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201028

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201028

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201028

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201028

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201028

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20201231

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20210729

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201212

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201212

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201028

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201231

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201231

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201028

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210228

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201028

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201028

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201028

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201028

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201231

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20211212

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20211212

REG Reference to a national code

Ref country code: AT

Ref legal event code: UEP

Ref document number: 1328410

Country of ref document: AT

Kind code of ref document: T

Effective date: 20201028

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20221122

Year of fee payment: 6

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 602017026527

Country of ref document: DE

Representative=s name: CBDL PATENTANWAELTE GBR, DE

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230528

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20231121

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20231122

Year of fee payment: 7

Ref country code: DE

Payment date: 20231121

Year of fee payment: 7

Ref country code: AT

Payment date: 20231123

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20240102

Year of fee payment: 7