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EP3167083A1 - Device for immobilising the chute on the ends of journals in an apparatus for loading a shaft furnace - Google Patents

Device for immobilising the chute on the ends of journals in an apparatus for loading a shaft furnace

Info

Publication number
EP3167083A1
EP3167083A1 EP15733745.2A EP15733745A EP3167083A1 EP 3167083 A1 EP3167083 A1 EP 3167083A1 EP 15733745 A EP15733745 A EP 15733745A EP 3167083 A1 EP3167083 A1 EP 3167083A1
Authority
EP
European Patent Office
Prior art keywords
pin
chute
plate
rotation
housing
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
EP15733745.2A
Other languages
German (de)
French (fr)
Other versions
EP3167083B1 (en
Inventor
Paul Tockert
Ettore Rizzuti
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.)
Paul Wurth SA
Original Assignee
Paul Wurth 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 Paul Wurth SA filed Critical Paul Wurth SA
Publication of EP3167083A1 publication Critical patent/EP3167083A1/en
Application granted granted Critical
Publication of EP3167083B1 publication Critical patent/EP3167083B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/18—Bell-and-hopper arrangements
    • C21B7/20—Bell-and-hopper arrangements with appliances for distributing the burden
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/20—Arrangements of devices for charging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/10—Charging directly from hoppers or shoots

Definitions

  • the present invention relates to the attachment of a distribution chute of a charging installation of a shaft furnace, such as a blast furnace, on the trunnions supporting the chute and ensuring its pivoting. It relates more particularly to the locking system of the chute on the ends of the trunnions.
  • a charging installation of a shaft furnace typically comprises a fixed feed channel disposed vertically in the center of the blast furnace, centered on the vertical axis of the furnace, and a distribution chute for distributing the charged materials in the furnace. arriving by said channel.
  • the dispensing chute is rotatable along said vertical and pivoting axis along a horizontal axis.
  • the chute is typically pivotally mounted along said horizontal axis in a ferrule mounted coaxially around said feed channel and rotatable along the vertical axis.
  • the chute is pivotally mounted in the shell by means of generally cylindrical pins of horizontal axis, on which the chute is secured and which are rotatably mounted along said horizontal axis in integral bearings of the ferrule.
  • the rotation of the ferrule and the pivoting of the chute are generally provided by gear means located in an annular chamber surrounding the ferrule.
  • the chute is fixed on both sides on the radially inner ends, directed towards the vertical axis of the furnace, journals, which are pivotally driven by means of the gear drive means located in said room surrounding the shell.
  • These drive means can act directly on the journals by meshing, or by means of arms or levers.
  • the locking pins comprise a cylindrical body slidably mounted and rotating in a bore formed in the trunnion and of axis parallel to that of the trunnion, an eccentric stud 31 formed at the end of the body located towards the trough, and rotational control and rotational locking means, located at the opposite end of the pin body, accessible at the outer end end of the journal which is located in the annular chamber surrounding the ferrule.
  • a particular problem is that locking in It must be possible to rotate the pin in different angular positions thereof, because this angular position is determined by the cooperation of the eccentric pin with the hole in the leg of the chute and, because of the dimensional dispersions between the housings of the chute. ends of the trunnions, the legs of the chute, the pins and the holes in which they engage, or also deformations or wear of these elements, said angular position of the pin, adapted to ensure the correct locking of the chute, is variable from one assembly to another, and / or must be adjustable to ensure maintenance without play of the assembly.
  • a known embodiment of these locking means consists of an arm secured to the end of the pin, which has at its end a screw and an adjusting nut and locking, which allows locking said arm on the front end of the pin in different positions, thereby immobilizing the pin in the desired position.
  • the arm is replaced by a flat tab that can be clamped to the front end of the journal in a plurality of positions.
  • a disadvantage of these lock pin locking systems is that they occupy a large part of the front end surface of the pin, while it is also occupied by the connections of cooling ducts formed in the trunnions to cool them, and possibly the chute.
  • these connections are more cumbersome because they include rotating joints, necessary to connect the pivoting pins to the fixed ducts for supplying cooling water. It follows that it is necessary to disassemble these rotating joints to have access to the pin locking means, when it is necessary to act on them, especially during the replacements of the chute. Accordingly, particularly when using a pressurized cooling system, it is then necessary to purge the circuit prior to disassembly and then fill it again. Errors can be made then and during the restart of the cooling. In addition, the cooling of the trunnions is stopped during the entire operation of replacing the chute, while the trunnions remain exposed to the intense heat prevailing in the furnace.
  • An object of the present invention is to solve the aforementioned problems. It aims in particular to allow the replacement of the chute without requiring disassembly of rotary joints. It also aims to keep the cooling circuit in use during chute change operations. It is particularly intended to reduce the size of the locking means locking pins of the chute, while ensuring, however, both the reliability of this blockage and the possibility of ensuring it in the various angular positions where it can It is necessary to place the pins in order to ensure that the legs of the chute do not play on the trunnions.
  • the invention relates to a device for locking the chute on the ends of the trunnions, in a charging installation of a shaft furnace as indicated above, having a distribution trough of material rotatably mounted along a horizontal axis by means of rotating journals in fixed bearings of a supporting ferrule having a vertical axis of rotation, the chute being connected to the journals by upper end tabs of the chute which 'engage in housings arranged on inner ends of the pins and which are blocked by pins housed in the trunnions and axis parallel to the axis of the trunnions, each pin having at its inner end facing the vertical axis a eccentric pin engaging with a leg of the chute to keep the tab locked at the bottom of its housing, and locking means for locking the pin in rotation.
  • each pin comprises, at its outer end opposite the stud, adjusting means in rotation and clamping, to be able to press with sufficient effort the stud on the leg of the chute by a rotation of the pin
  • the locking means comprise an indexing plate rotatably connected to the end of the pin, the plate further comprising teeth arranged to cooperate with the corresponding teeth of a latch secured to the trunnion, so that said latch can immobilize the pin in rotation in a plurality of circumferential positions of said pin.
  • the device of the invention allows easy access to the pin by simply removing the indexing plate, which then allows to rotate the pin to unlock the legs of chute, then pull axially to allow the legs of the chute out of their housing in the trunnions, and thus allow the removal of the chute and its replacement. It suffices for this to be able to access the fixing means of the indexing plate on the external end of the trunnion, which can be done without interfering with the other elements fixed on said front end, such as in particular rotating joints of the cooling circuit.
  • the pin is put back in place, turned and tightened to ensure the pressure of the eccentric pin on the leg of the chute, then locked in position by engagement of the teeth of the index plate with those of the lock, as will be specified later.
  • the indexing plate is rotatably connected to the pin by means of rotational connection arranged to ensure the connection in rotation according to different relative angular positions.
  • the rotational connection means comprise a polygonal shape made on the pin, cooperating with a cut-out adapted form made in the index plate.
  • the polygonal shape of the pin is hexagonal and the cutting of the index plate is in the form of a double hexagon. This arrangement therefore makes it possible to adjust the relative angular position between the pin and the indexing plate with a pitch limited to 1/12 turn or 30 degrees of angle.
  • the polygonal shape of the pin is extended towards the outer end of the pin to also serve as means for adjusting in rotation and clamping, for example by a polygonal key of the current type.
  • the indexing plate is fixed on an outer end of the trunnion, and serves as an axial stop of the pin, thus preventing any risk of removal of the pin by axial sliding in its bore in the trunnion.
  • the indexing plate is fixed on the trunnion by bolts passing through the slots of the indexing plate, said slots being in the shape of a circular arc centered on the axis of rotation of the pin.
  • These lights allow the attachment of the indexing plate on the trunnion in a plurality of angular positions, limited only by the length of the lights, and thus allows to accurately position and maintain the index plate, and therefore the pin, in the angular position adapted to ensure the clamping of the leg of the chute in its housing.
  • the lock preferably comprises a plate having teeth engaging with the teeth of the indexing plate, the teeth of the index plate and the lock plate being arranged according to arcs of circles centered on the axis of rotation of the pin, which allows the locking of the indexing plate regardless of the relative angular positions of the indexing plate and the lock.
  • the lock plate is fixed on the outer end of the trunnion by bolts passing through the slots of the wafer, said lights being shaped circular arc centered on the axis of rotation of the pin.
  • lateral stop means are provided to limit the stroke of the wafer in the circumferential direction.
  • These lateral abutment means preferably comprise a side wall of a housing formed in the external end of the trunnion and in which the lock plate is fixed, said side wall of the housing acting as an abutment for one end of the wafer.
  • the ends of the wafer are offset by a half pitch of teeth with respect to the toothing of the wafer.
  • This provision allows, by a reversal of the wafer on itself, to be able to lock the pin in rotation with an even finer adjustment of its angular positioning, reduced to an angle value corresponding to the angular value of a half step of the locking teeth.
  • the indexing plate is housed in a housing formed on the front end of the journal, the housing having side walls which constitute pivoting stops of the indexing plate, with an angular clearance. sufficient to allow to place the indexing plate in its housing whatever the angular position of the pin.
  • the connection between the pin and the indexing plate is provided by a hexagonal shape of the pin and a double hexagon shape of the cutting of the indexing plate in which engages said hexagonal shape of the pin
  • the angular clearance between the index plate and the side walls of its housing is 30 degrees. This means that the indexing plate can be placed in its housing in a plurality of angular positions over a 30 degree arc.
  • Figure 2 is a general view of the support system and driving pivoting of the chute, seen from the side of the outer end of a trunnion;
  • Figure 3 is an axial sectional view of the pin in the radial plane containing the pin
  • Figure 4 is a perspective view of the pin equipped with the index plate and with the locking plate;
  • Figure 5 is a cross-sectional view along the line V-V of Figure 3;
  • Figures 6 and 7 show two alternative positions of the locking plate engaged with the teeth of the index plate.
  • the support system and pivoting of the chute shown in Figure 2 comprises, on each side of the chute, a bearing 22 in which the pin 2 is rotatably mounted along a horizontal axis A1, and pivotally driven by a mechanism comprising a gear case 23, an output shaft carries a pinion 24 meshing with a toothed sector 25 of a control arm 26 connected in rotation with the pin.
  • rotating joints 28 are connected to connect ducts for internal cooling of the trunnions.
  • the end 32 shaped in hexagon, the pin 3 opposite the eccentric pin 31 which cooperates with the tab 1 1 of the chute to block it in its housing 21 , as indicated at the beginning of this memo in relation with FIG. 1, and the means 4 for locking in rotation of the pin 3 on the journal, which particularly comprise an indexing plate 41 and a locking plate 42.
  • the pin 3 is rotatably and slidably mounted in a bore of axis A2 of the journal parallel and eccentric by contribution to the axis A1. Its inner end, located towards the chute, comprises the eccentric pin 31 which, in the locked position of the chute, protrudes axially in the housing 21 to engage in the hole provided for this purpose in the tab 1 1 of the chute.
  • the pin is shaped according to a hexagon 321 which is engaged with a hole in the form of a double hexagon 41 1 made in the indexing plate 41, and protrudes from this plate so as to be able to place a wrench to turn the pin 3 along its axis A2 and thus rotate the eccentric pin and block the leg of the chute in its housing, as indicated above.
  • the indexing plate 41 is housed in a housing 5 formed for this purpose in the outer end of the trunnion, and being fixed to the bottom of this housing, axially blocks the pin to prevent the eccentric pin from emerging from the hole the leg of the chute by axial sliding of the pin.
  • the indexing plate 41 comprises two arms 412, 413 extending in substantially diametrically opposite directions, in which oblong slots 414 are formed in centered circular arcs. on the A2 axis of the pin. Fastening bolts 415, passing through these slots and screwed into the trunnion, make it possible to tighten the indexing plate 41 on a front wall 51 constituting the bottom of the housing 5, thereby immobilizing the indexing plate, and thus the pin, in rotation. .
  • One of the arms 413 carries at its end a right-angle toothing 416 in the form of an arc of a circle, centered on the axis A2, which engages with a corresponding toothing 421 formed on the locking plate 42.
  • the wafer of FIG. lock 42 has an oblong slot 422 in which passes a bolt 423 for fixing the plate in the housing 5 of the pin.
  • the locking plate 42 is housed in a portion 52 of the housing 5 having a side wall 53 arranged to abut one of the ends 424, 425 of the wafer 42.
  • the housing 5 further comprises two side walls 54, 55 confronting the lateral faces of arms 412 and 413, but arranged so that there remains overall between said arms and said side walls games j1, j2 allowing an overall angular clearance j1 + j2 of the index plate equal to, or slightly greater than, 30 °, necessary to allow to place the plate d indexing 41 in both the housing 5 and the hexagonal end 32 of the pin 2, regardless of the angular position of said pin.
  • the ends 424, 425 of the fixing plate are offset by a half-step relative to the toothing, so that by a reversal of the plate, it is can best ensure, and regardless of the angular position of the pin and the index plate, both the engagement of the teeth of the indexing plate and the locking plate, and the stop of the wafer locking against the side wall 53 of its housing.
  • the engagement of the teeth, while the locking plate is placed in a first direction would lead to a clearance between the end 424 of the wafer and the side wall 53 as shown in FIG. 6, it is possible to eliminate or at least reduce this game by turning the wafer so that it is then the other end 425 which is located in abutment, without play, against the side wall 53, as shown in FIG.
  • the tabs 1 1 thereof are placed in the housing 21 of the support pins 2. Then, on each side, the pin 3 is pushed axially so as to penetrate the eccentric pin 31 into the hole of the lug 1 January. By means of a key engaged on the end 32 of the pin, the pin is rotated until the pin 31 blocks the tab 1 1 in the housing 21. In this position, the indexing plate 41 is adjusted on the hexagon 321 of the end of the pin so that said plate fits into the housing 5 of the front end of the pin with a minimum clearance, and tightening the bolts 415 so as to clamp the indexing plate 41 against the bottom 51 of its housing, thereby immobilizing the pin axially and rotationally.
  • the locking plate 42 is then positioned in the direction ensuring a zero or minimum clearance between the end 424 or 425 of the wafer and the wall 53 of its housing, and the bolt 423 holding the wafer is tight. Thanks to the different relative angular positions between the pin and the indexing plate, which can be obtained by engagement of the double hexagonal shape of the indexing plate with the hexagonal shape 321 of the end of the pin, and thanks to the teeth 416, 421 which can engage respectively with an angular pitch corresponding to the pitch of the toothing, and thanks to the possibility of reversal of the locking plate, it can finally ensure a reliable locking and virtually without play of the pin regardless of its angular position. In addition, as already indicated, a triple security exists to prevent the chute from falling, even in the case where the locking plate would disappear and that the bolts of the indexing plate would come to loosen.
  • the invention is not limited to the embodiment described above by way of example.
  • a hexagonal shape of the end of the pin to allow its rotation by a key one could use any other form adapted to the clamping tool used.
  • the hexagonal and double-hexagonal shapes of the connection between the indexing plate and the pin could also be replaced by other polygonal shapes of the same function, for example a square on the pin and a double square in the indexing plate , games j1 and j2 being adapted accordingly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Blast Furnaces (AREA)
  • Clamps And Clips (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Furnace Details (AREA)

Abstract

The invention relates to a device for immobilising the chute on the ends of journals in an apparatus for loading a shaft furnace, comprising a pivotable chute (1) for distributing material, the chute being connected to support journals (2) by means of tabs (11) which are inserted into recesses (21) arranged on the journals and which are immobilised thereon by means of pins (3) comprising an eccentric nipple (31) at the end thereof which is inserted in a lug of the chute in order to keep the lug immobilised at the bottom of the recess thereof, and locking means (4) for rotationally locking the chute. Each chute comprises, at the outer end thereof opposite the nipple, means (32) for rotational adjustment and for clamping in order to be able to press the nipple onto the lug of the chute using sufficient force by means of rotating the pin, and the locking means comprising an indexing plate (41) which is rotatably connected to the end of the pin (3), the plate (41) further comprising teeth (416) which are arranged so as to engage in the corresponding teeth (421) of a lock (42) which is rigidly connected to the journal in such a way that said lock can render the pin unable to rotate in a plurality of circumferential positions of said pin.

Description

Dispositif de blocage de la goulotte sur les extrémités des tourillons, dans une installation de chargement d'un four a cuve  Chute locking device on the ends of the trunnions, in a charging installation of a shaft furnace
Domaine technique Technical area
[0001 ] La présente invention concerne la fixation d'une goulotte de distribution d'une installation de chargement d'un four à cuve, tel qu'un haut fourneau, sur les tourillons supportant cette goulotte et assurant son pivotement. Elle concerne plus particulièrement le système de blocage de la goulotte sur les extrémités des tourillons. The present invention relates to the attachment of a distribution chute of a charging installation of a shaft furnace, such as a blast furnace, on the trunnions supporting the chute and ensuring its pivoting. It relates more particularly to the locking system of the chute on the ends of the trunnions.
Etat de la technique State of the art
[0002] Une installation de chargement d'un four à cuve comprend typiquement un canal d'alimentation fixe disposé verticalement au centre du gueulard, centré sur l'axe vertical du four, et une goulotte de distribution pour répartir dans le four les matières chargées arrivant par ledit canal. Pour permettre de distribuer la matière chargée de manière adéquate, la goulotte de distribution est rotative selon ledit axe vertical et pivotante selon un axe horizontal. A cette fin, la goulotte est typiquement montée pivotante selon ledit axe horizontal dans une virole montée coaxialement autour dudit canal d'alimentation et rotative selon l'axe vertical. La goulotte est montée pivotante dans la virole par l'intermédiaire de tourillons de forme générale cylindrique d'axe horizontal, sur lesquels la goulotte est solidarisée et qui sont montés tournant selon ledit axe horizontal dans des paliers solidaires de la virole. La rotation de la virole et le pivotement de la goulotte sont généralement assurés par des moyens à engrenages situés dans une chambre annulaire entourant la virole. A charging installation of a shaft furnace typically comprises a fixed feed channel disposed vertically in the center of the blast furnace, centered on the vertical axis of the furnace, and a distribution chute for distributing the charged materials in the furnace. arriving by said channel. To enable the dispensed material to be dispensed adequately, the dispensing chute is rotatable along said vertical and pivoting axis along a horizontal axis. To this end, the chute is typically pivotally mounted along said horizontal axis in a ferrule mounted coaxially around said feed channel and rotatable along the vertical axis. The chute is pivotally mounted in the shell by means of generally cylindrical pins of horizontal axis, on which the chute is secured and which are rotatably mounted along said horizontal axis in integral bearings of the ferrule. The rotation of the ferrule and the pivoting of the chute are generally provided by gear means located in an annular chamber surrounding the ferrule.
[0003] La goulotte est fixée de part et d'autre sur les extrémités radialement internes, dirigées vers l'axe vertical du four, des tourillons, qui sont entraînés en pivotement par l'intermédiaire des moyens d'entraînement à engrenage situés dans ladite chambre entourant la virole. Ces moyens d'entraînement peuvent agir directement sur les tourillons par engrènement, ou par l'intermédiaire de bras ou leviers. The chute is fixed on both sides on the radially inner ends, directed towards the vertical axis of the furnace, journals, which are pivotally driven by means of the gear drive means located in said room surrounding the shell. These drive means can act directly on the journals by meshing, or by means of arms or levers.
[0004] Pour assurer un bon fonctionnement de la goulotte, celle-ci doit être liée solidement et rigidement sur les tourillons. Mais pour notamment permettre un remplacement facile de la gou lotte, celle-ci est supportée et fixée de manière démontable sur les tourillons. To ensure proper operation of the chute, it must be firmly and rigidly connected to the trunnions. But in particular to allow a easy replacement of the sailguard, it is supported and removably attached to the trunnions.
[0005] Pour assurer ces deux besoins de liaison rigide mais néanmoins démontable, il est connu d'utiliser une liaison telle que celle illustrée sur la figure 1 , où la goulotte 1 comporte vers sa partie supérieure des pattes de fixations 1 1 de forme adaptée pour s'engager dans des logements 21 de forme correspondante réalisés sur les extrémités des tourillons 2. On notera que les formes des pattes et des logements sont particulièrement dessinées de manière à permettre d'engager les pattes dans les logements, puis, par un pivotement relatif, appliquer les pattes dans le fond des logements. Le maintien de cette position est assuré par une goupille de blocage 3 qui est amovible pour permettre de dégager les pattes de la goulotte hors des logements des tourillons, mais qui doit aussi assurer que l'assemblage des pattes sur les tourillons est sûr et sans jeu. To ensure these two needs for rigid connection but nevertheless removable, it is known to use a connection such as that illustrated in Figure 1, where the chute 1 has to its upper part of the brackets 1 1 adapted form to engage in housings 21 of corresponding shape made on the ends of the trunnions 2. Note that the shapes of the legs and housing are particularly designed to allow to engage the legs in the housing, and then by pivoting relative, apply the legs in the bottom of housing. Maintaining this position is provided by a locking pin 3 which is removable to allow to release the legs of the chute out of the housing of the trunnions, but which must also ensure that the assembly of the legs on the trunnions is safe and without play .
[0006] Typiquement les goupilles de blocage comportent un corps cylindrique monté coulissant et tournant dans un alésage réalisé dans le tourillon et d'axe parallèle à celui du tourillon, un téton excentré 31 formé à l'extrémité du corps située vers la goulotte, et des moyens de commande de rotation et de verrouillage en rotation, situés à l'extrémité opposée du corps de goupille, accessibles au niveau de l'extrémité frontale externe du tourillon qui est située dans la chambre annulaire entourant la virole. Lors de la mise en place de la goulotte, après que les pattes de celle-ci sont positionnées dans les logements des tourillons, les goupilles de blocage sont poussées axialement dans les alésages des tourillons jusqu'à insérer les tétons excentrés dans des trous réalisés à cet effet dans les pattes de la goulotte. Par un pivotement des goupilles, et grâce à l'excentration des tétons, ceux-ci agissent sur les pattes de la goulotte, en poussant sur les parois des trous de pattes, pour pousser ces dernières dans le fond de leurs logements, et assurer ainsi l'assemblage sans jeu de la goulotte sur les tourillons. Pour empêcher que la goupille puisse se dégager en coulissant axialement, et pour assurer aussi que la goupille ne tourne pas ultérieurement en cours de fonctionnement du four, ce qui pourrait provoquer une désolidarisation de la goulotte, des moyens de verrouillage sont prévus au niveau de l'extrémité de la goupille opposée au téton, pour bloquer tout déplacement de la goupille tant axialement que en rotation. Un problème particulier est que le verrouillage en rotation de la goupille doit pouvoir être assuré en différentes positions angulaires de celle-ci, car cette position angulaire est déterminée par la coopération du téton excentré avec le trou de la patte de la goulotte et, du fait des dispersions dimensionnelles entre les logements d'extrémités des tourillons, les pattes de la goulotte, les tétons et les trous dans lesquels ils s'engagent, ou aussi des déformations ou de l'usure de ces éléments, ladite position angulaire de la goupille, apte à assurer le blocage correct de la goulotte, est variable d'un montage à l'autre, et/ou doit pouvoir être ajustée pour assurer le maintien sans jeu de l'assemblage. Typically the locking pins comprise a cylindrical body slidably mounted and rotating in a bore formed in the trunnion and of axis parallel to that of the trunnion, an eccentric stud 31 formed at the end of the body located towards the trough, and rotational control and rotational locking means, located at the opposite end of the pin body, accessible at the outer end end of the journal which is located in the annular chamber surrounding the ferrule. When placing the chute, after the legs thereof are positioned in the housing of the trunnions, the locking pins are pushed axially in the holes of the trunnions until the eccentric pins are inserted into holes made to this effect in the legs of the chute. By pivoting the pins, and thanks to the eccentric nipples, they act on the legs of the chute, pushing on the walls of the leg holes, to push them in the bottom of their homes, and ensure the assembly without play of the chute on the trunnions. To prevent the pin can disengage by sliding axially, and also to ensure that the pin does not rotate later during operation of the oven, which could cause a separation of the chute, locking means are provided at the level of end of the pin opposite the pin, to block any displacement of the pin both axially and rotationally. A particular problem is that locking in It must be possible to rotate the pin in different angular positions thereof, because this angular position is determined by the cooperation of the eccentric pin with the hole in the leg of the chute and, because of the dimensional dispersions between the housings of the chute. ends of the trunnions, the legs of the chute, the pins and the holes in which they engage, or also deformations or wear of these elements, said angular position of the pin, adapted to ensure the correct locking of the chute, is variable from one assembly to another, and / or must be adjustable to ensure maintenance without play of the assembly.
[0007] Pour répondre à ce problème, un mode de réalisation connu de ces moyens de verrouillage consiste en un bras solidarisé à l'extrémité de la goupille, qui comporte à son extrémité une vis et un écrou de réglage et de blocage, qui permet de bloquer le dit bras sur l'extrémité frontale du tourillon en différentes positions, immobilisant ainsi la goupille dans la position désirée. Dans un autre mode de réalisation, le bras est remplacé par une patte plate qui peut être serrée sur l'extrémité frontale du tourillon en plusieurs positions. To address this problem, a known embodiment of these locking means consists of an arm secured to the end of the pin, which has at its end a screw and an adjusting nut and locking, which allows locking said arm on the front end of the pin in different positions, thereby immobilizing the pin in the desired position. In another embodiment, the arm is replaced by a flat tab that can be clamped to the front end of the journal in a plurality of positions.
[0008] Un inconvénient de ces systèmes de verrouillage des goupilles de blocage est qu'ils occupent une grande partie de la surface d'extrémité frontale du tourillon, alors que celle-ci est aussi occupée par les raccordements de conduits de refroidissement ménagés dans les tourillons pour refroidir ceux-ci, ainsi qu'éventuellement la goulotte. Typiquement, ces raccordements sont de plus encombrants car ils comportent des joints tournants, nécessaires pour relier les tourillons pivotants aux conduits fixes d'amenée d'eau de refroidissement. Il en résulte qu'il est nécessaire de démonter ces joints tournants pour avoir accès aux moyens de verrouillage des goupilles, lorsqu'il est nécessaire d'agir sur ceux-ci, en particulier lors des remplacements de la goulotte. En conséquence, en particulier lorsqu'on utilise un système de refroidissement sous pression, il est alors nécessaire de purger le circuit préalablement au démontage, puis de le remplir à nouveau ensuite. Des erreurs peuvent être faites alors et lors de la remise en service du refroidissement. De plus, le refroidissement des tourillons se trouve arrêté pendant toute l'opération de remplacement de la goulotte, alors que les tourillons restent exposés à la chaleur intense régnant dans le four. Objet de l'invention A disadvantage of these lock pin locking systems is that they occupy a large part of the front end surface of the pin, while it is also occupied by the connections of cooling ducts formed in the trunnions to cool them, and possibly the chute. Typically, these connections are more cumbersome because they include rotating joints, necessary to connect the pivoting pins to the fixed ducts for supplying cooling water. It follows that it is necessary to disassemble these rotating joints to have access to the pin locking means, when it is necessary to act on them, especially during the replacements of the chute. Accordingly, particularly when using a pressurized cooling system, it is then necessary to purge the circuit prior to disassembly and then fill it again. Errors can be made then and during the restart of the cooling. In addition, the cooling of the trunnions is stopped during the entire operation of replacing the chute, while the trunnions remain exposed to the intense heat prevailing in the furnace. Object of the invention
[0009] Un objet de la présente invention est de résoudre les problèmes prémentionnés. Elle vise en particulier à permettre le remplacement de la goulotte sans nécessiter le démontage des joints tournants. Elle vise aussi à permettre de conserver le circuit de refroidissement en service pendant les opérations de changement de goulotte. Elle vise particulièrement à réduire l'encombrement des moyens de verrouillage des goupilles de blocage de la goulotte, tout en assurant cependant, et à la fois, la fiabilité de ce blocage et la possibilité de l'assurer dans les diverses positions angulaires où il peut être nécessaire de placer les goupilles pour assurer le blocage sans jeu des pattes de la goulotte sur les tourillons. An object of the present invention is to solve the aforementioned problems. It aims in particular to allow the replacement of the chute without requiring disassembly of rotary joints. It also aims to keep the cooling circuit in use during chute change operations. It is particularly intended to reduce the size of the locking means locking pins of the chute, while ensuring, however, both the reliability of this blockage and the possibility of ensuring it in the various angular positions where it can It is necessary to place the pins in order to ensure that the legs of the chute do not play on the trunnions.
[0010] Avec ces objectifs en vue, l'invention a pour objet un dispositif de blocage de la goulotte sur les extrémités des tourillons, dans une installation de chargement d'un four à cuve telle qu'indiqué précédemment, comportant une goulotte de distribution de matières montée pivotante selon un axe horizontal par l'intermédiaire de tourillons rotatifs dans des paliers fixes d'une virole de support ayant un axe de rotation vertical, la goulotte étant liée aux tourillons par des pattes d'extrémité supérieure de la goulotte qui s'engagent dans des logements aménagés sur des extrémités internes des tourillons et qui y sont bloquées par des goupilles logées dans les tourillons et d'axe parallèle à l'axe des tourillons, chaque goupille comportant à son extrémité interne orientée vers l'axe vertical un téton excentré s'engageant avec une patte de la goulotte pour maintenir la patte bloquée au fond de son logement, et des moyens de verrouillage pour verrouiller la goupille en rotation. With these objectives in view, the invention relates to a device for locking the chute on the ends of the trunnions, in a charging installation of a shaft furnace as indicated above, having a distribution trough of material rotatably mounted along a horizontal axis by means of rotating journals in fixed bearings of a supporting ferrule having a vertical axis of rotation, the chute being connected to the journals by upper end tabs of the chute which 'engage in housings arranged on inner ends of the pins and which are blocked by pins housed in the trunnions and axis parallel to the axis of the trunnions, each pin having at its inner end facing the vertical axis a eccentric pin engaging with a leg of the chute to keep the tab locked at the bottom of its housing, and locking means for locking the pin in rotation.
[001 1 ] Selon l'invention, ce système est caractérisé en ce que chaque goupille comporte, à son extrémité externe opposée au téton, des moyens de réglage en rotation et de serrage, pour pouvoir presser avec un effort suffisant le téton sur la patte de la goulotte par une rotation de la goupille, et les moyens de verrouillage comportent une plaque d'indexation liée en rotation sur l'extrémité de la goupille, la plaque comportant par ailleurs des dentures agencées pour coopérer avec les dentures correspondantes d'un verrou solidarisé sur le tourillon, de manière que ledit verrou puisse immobiliser en rotation la goupille dans une pluralité de positions circonférentielles de ladite goupille. Description générale de l'invention [001 1] According to the invention, this system is characterized in that each pin comprises, at its outer end opposite the stud, adjusting means in rotation and clamping, to be able to press with sufficient effort the stud on the leg of the chute by a rotation of the pin, and the locking means comprise an indexing plate rotatably connected to the end of the pin, the plate further comprising teeth arranged to cooperate with the corresponding teeth of a latch secured to the trunnion, so that said latch can immobilize the pin in rotation in a plurality of circumferential positions of said pin. General description of the invention
[0012] Comme on le comprendra mieux par la suite, le dispositif selon l'invention permet d'accéder aisément à la goupille par une simple dépose de la plaquette d'indexation, qui permet alors de faire tourner la goupille pour débloquer les pattes de la goulotte, puis de la tirer axialement pour permettre de sortir les pattes de la goulotte de leurs logements dans les tourillons, et ainsi permettre la dépose de la goulotte et son remplacement. Il suffit pour cela de pouvoir accéder aux moyens de fixation de la plaque d'indexation, sur l'extrémité frontale externe du tourillon, ce qui peut se faire sans intervenir sur les autres éléments fixés sur ladite extrémité frontale, tels que notamment les joints tournants du circuit de refroidissement. Lors du remontage de la goulotte, la goupille est remise en place, tournée et serrée pour assurer la pression du téton excentré sur la patte de la goulotte, puis verrouillée en position par engagement des dentures de la plaque d'indexation avec celles du verrou, comme cela va être précisé par la suite. As will be better understood later, the device of the invention allows easy access to the pin by simply removing the indexing plate, which then allows to rotate the pin to unlock the legs of chute, then pull axially to allow the legs of the chute out of their housing in the trunnions, and thus allow the removal of the chute and its replacement. It suffices for this to be able to access the fixing means of the indexing plate on the external end of the trunnion, which can be done without interfering with the other elements fixed on said front end, such as in particular rotating joints of the cooling circuit. When reassembling the chute, the pin is put back in place, turned and tightened to ensure the pressure of the eccentric pin on the leg of the chute, then locked in position by engagement of the teeth of the index plate with those of the lock, as will be specified later.
[0013] Pour permettre ledit verrouillage par engagement des dentures, quel que soit la position angulaire de la goupille, la plaque d'indexation est liée en rotation à la goupille par des moyens de liaison en rotation agencés pour assurer la liaison en rotation selon différentes positions angulaires relatives. Après le blocage des pattes de la goulotte obtenu suite à la rotation de la goupille, il suffit de placer la plaque d'indexation sur la goupille dans une position permettant l'engagement de ses dentures avec celles du verrou. To enable said locking by engagement of the teeth, regardless of the angular position of the pin, the indexing plate is rotatably connected to the pin by means of rotational connection arranged to ensure the connection in rotation according to different relative angular positions. After locking the legs of the chute obtained following the rotation of the pin, simply place the indexing plate on the pin in a position for engagement of its teeth with those of the lock.
[0014] Préférentiellement, les moyens de liaison en rotation comportent une forme polygonale réalisée sur la goupille, coopérant avec une découpe de forme adaptée réalisée dans la plaque d'indexation. Préférentiellement encore, la forme polygonale de la goupille est hexagonale et la découpe de la plaque d'indexation est en forme de double hexagone. Cette disposition permet donc d'ajuster la position angulaire relative entre la goupille et la plaque d'indexation avec un pas limité à 1/12 de tour soit 30 degrés d'angle. Preferably, the rotational connection means comprise a polygonal shape made on the pin, cooperating with a cut-out adapted form made in the index plate. Also preferably, the polygonal shape of the pin is hexagonal and the cutting of the index plate is in the form of a double hexagon. This arrangement therefore makes it possible to adjust the relative angular position between the pin and the indexing plate with a pitch limited to 1/12 turn or 30 degrees of angle.
[0015] Selon une disposition particulière, la forme polygonale de la goupille se prolonge vers l'extrémité externe de la goupille pour servir également de moyens de réglage en rotation et de serrage, par exemple par une clé polygonale de type courant. [0016] Selon une autre disposition particulière avantageuse, la plaque d'indexation est fixée sur une extrémité frontale externe du tourillon, et sert de butée axiale de la goupille, empêchant donc tout risque de retrait de la goupille par coulissement axial dans son alésage réalisé dans le tourillon. According to a particular arrangement, the polygonal shape of the pin is extended towards the outer end of the pin to also serve as means for adjusting in rotation and clamping, for example by a polygonal key of the current type. According to another advantageous particular arrangement, the indexing plate is fixed on an outer end of the trunnion, and serves as an axial stop of the pin, thus preventing any risk of removal of the pin by axial sliding in its bore in the trunnion.
[0017] Avantageusement, la plaque d'indexation est fixée sur le tourillon par des boulons passant dans des lumières de la plaque d'indexation, lesdites lumières étant en forme d'arc de cercle centrés sur l'axe de rotation de la goupille. Ces lumières permettent la fixation de la plaque d'indexation sur le tourillon dans une pluralité de positions angulaires, limitées seulement par la longueur des lumières, et permet donc de positionner et maintenir précisément la plaque d'indexation, et donc la goupille, dans la position angulaire adaptée pour assurer le serrage de la patte de la goulotte dans son logement. Advantageously, the indexing plate is fixed on the trunnion by bolts passing through the slots of the indexing plate, said slots being in the shape of a circular arc centered on the axis of rotation of the pin. These lights allow the attachment of the indexing plate on the trunnion in a plurality of angular positions, limited only by the length of the lights, and thus allows to accurately position and maintain the index plate, and therefore the pin, in the angular position adapted to ensure the clamping of the leg of the chute in its housing.
[0018] Le verrou comporte préférentiellement une plaquette comportant des dentures s'engageant avec les dentures de la plaque d'indexation, les dentures de la plaque d'indexation et de la plaquette de verrou étant arrangées selon des arcs de cercles centrés sur l'axe de rotation de la goupille, ce qui permet le verrouillage de la plaque d'indexation quelles que soient les positions angulaires relatives de la plaquette d'indexation et du verrou. The lock preferably comprises a plate having teeth engaging with the teeth of the indexing plate, the teeth of the index plate and the lock plate being arranged according to arcs of circles centered on the axis of rotation of the pin, which allows the locking of the indexing plate regardless of the relative angular positions of the indexing plate and the lock.
[0019] La plaquette de verrou est fixée sur l'extrémité frontale externe du tourillon par des boulons passant dans des lumières de la plaquette, lesdites lumières étant en forme d'arc de cercle centrés sur l'axe de rotation de la goupille. De plus, des moyens de butée latérale sont prévus pour limiter la course de la plaquette dans la direction circonférentielle. Ces moyens de butée latérale comportent préférentiellement une paroi latérale d'un logement formé dans l'extrémité frontale externe du tourillon et dans lequel la plaquette de verrou est fixée, ladite paroi latérale du logement servant de butée pour une extrémité de la plaquette. Ainsi, on obtient un verrouillage fiable de la goupille dans la position requise pour assurer le blocage des pattes de la goulotte par le téton excentré, par la liaison en rotation de la goupille avec la plaque d'indexation, puis l'engagement des dentures de cette dernière avec le verrou, puis blocage du verrou par butée dans son logement. The lock plate is fixed on the outer end of the trunnion by bolts passing through the slots of the wafer, said lights being shaped circular arc centered on the axis of rotation of the pin. In addition, lateral stop means are provided to limit the stroke of the wafer in the circumferential direction. These lateral abutment means preferably comprise a side wall of a housing formed in the external end of the trunnion and in which the lock plate is fixed, said side wall of the housing acting as an abutment for one end of the wafer. Thus, a reliable locking of the pin in the required position is obtained to ensure the locking of the legs of the chute by the eccentric pin, the rotational connection of the pin with the indexing plate, then the engagement of the teeth of the latter with the lock, then locking the lock by stop in its housing.
[0020] Préférentiellement encore, les extrémités de la plaquette sont décalées d'un demi pas de denture par rapport à la denture de la plaquette. Cette disposition permet, par un retournement de la plaquette sur elle même, de pouvoir verrouiller la goupille en rotation avec un ajustement encore plus fin de son positionnement angulaire, ramené à une valeur d'angle correspondant à la valeur angulaire d'un demi pas de la denture de verrouillage. Preferably again, the ends of the wafer are offset by a half pitch of teeth with respect to the toothing of the wafer. This provision allows, by a reversal of the wafer on itself, to be able to lock the pin in rotation with an even finer adjustment of its angular positioning, reduced to an angle value corresponding to the angular value of a half step of the locking teeth.
[0021 ] Selon une disposition complémentaire, la plaque d'indexation est logée dans un logement formé sur l'extrémité frontale du tourillon, le logement comportant des parois latérales qui constituent des butés de pivotement de la plaque d'indexation, avec un jeu angulaire suffisant pour permettre de placer la plaque d'indexation dans son logement quelque soit la position angulaire de la goupille. Typiquement lorsque la liaison entre la goupille et la plaque d'indexation est assurée par une forme hexagonale de la goupille et une forme de double hexagone de la découpe de la plaque d'indexation dans laquelle s'engage ladite forme hexagonale de la goupille, le jeu angulaire entre la plaque d'indexation et les parois latérales de son logement est de 30 degrés. Ce qui signifie que la plaque d'indexation peut être placée dans son logement dans une pluralité de positions angulaires sur un arc de 30 degrés. According to a complementary arrangement, the indexing plate is housed in a housing formed on the front end of the journal, the housing having side walls which constitute pivoting stops of the indexing plate, with an angular clearance. sufficient to allow to place the indexing plate in its housing whatever the angular position of the pin. Typically when the connection between the pin and the indexing plate is provided by a hexagonal shape of the pin and a double hexagon shape of the cutting of the indexing plate in which engages said hexagonal shape of the pin, the angular clearance between the index plate and the side walls of its housing is 30 degrees. This means that the indexing plate can be placed in its housing in a plurality of angular positions over a 30 degree arc.
[0022] Ces diverses dispositions permettent d'assurer une triple sécurité contre le risque d'un pivotement indésirable de la goupille qui pourrait conduire à une désolidarisation de la goulotte sur ses tourillons : en situation normale, la plaquette de verrou assure le blocage en rotation de la plaque d'indexation et de la goupille ; si la plaquette venait à être perdue, la plaque d'indexation assure quand même le maintien de la goupille en rotation, du fait qu'elle est serrée par ses boulons de fixation ; et si ces boulons venaient à être desserrés, la goupille pourrait tourner au maximum d'un douzième de tour, retenue par la butée de la plaquette d'indexation dans son logement. Dans ce dernier cas, certes la goulotte pourrait ne plus être correctement maintenue par serrage de ses pattes dans leurs logements des extrémités frontales des tourillons, mais les pattes ne pourraient cependant pas se dégager totalement de leurs logements, et la goulotte ne serait donc pas perdue par sa chute dans le haut fourneau. These various provisions allow to ensure a triple security against the risk of undesirable pivoting of the pin which could lead to a separation of the chute on its trunnions: in normal situation, the lock plate ensures the locking in rotation index plate and pin; if the wafer was to be lost, the indexing plate still ensures the maintenance of the pin in rotation, because it is tightened by its fixing bolts; and if these bolts were to be loosened, the pin could rotate a maximum of one twelfth of a turn, held by the stop of the indexing plate in its housing. In the latter case, certainly the chute could no longer be properly maintained by clamping its legs in their housing of the front ends of the trunnions, but the legs could not however be released completely from their homes, and the chute would not be lost by his fall in the blast furnace.
Brève description des dessins Brief description of the drawings
[0023] D'autres particularités et caractéristiques de l'invention ressortiront de la description détaillée d'un mode de réalisation avantageux présenté ci-dessous, à titre d'illustration, en se référant aux dessins annexés, dans lesquels : La figure 1 , déjà commentée, est une vue de la liaison entre la goulotte et les tourillons de support ; Other features and characteristics of the invention will become apparent from the detailed description of an advantageous embodiment presented below, by way of illustration, with reference to the accompanying drawings, in which: Figure 1, already commented, is a view of the connection between the chute and the support pins;
La figure 2 est une vue générale du système de support et d'entraînement en pivotement de la goulotte, vu du côté de l'extrémité frontale externe d'un tourillon ; Figure 2 is a general view of the support system and driving pivoting of the chute, seen from the side of the outer end of a trunnion;
La figure 3 est une vue en coupe axiale du tourillon, dans le plan radial contenant la goupille ; Figure 3 is an axial sectional view of the pin in the radial plane containing the pin;
La figure 4 est une vue en perspective de la goupille équipée de la plaque d'indexation et avec la plaquette de verrouillage ; Figure 4 is a perspective view of the pin equipped with the index plate and with the locking plate;
La figure 5 est une vue en coupe transversale selon la ligne V-V de la figure 3 ; Figure 5 is a cross-sectional view along the line V-V of Figure 3;
Les figures 6 et 7 montrent deux positions alternatives de la plaquette de verrouillage engagée avec les dentures de la plaque d'indexation. Figures 6 and 7 show two alternative positions of the locking plate engaged with the teeth of the index plate.
Description d'une exécution préférée  Description of a preferred execution
[0024] Le système de support et d'entraînement en pivotement de la goulotte représenté figure 2 comporte, de chaque côté de la goulotte, un palier 22 dans lequel le tourillon 2 est monté rotatif selon un axe horizontal A1 , et entraîné en pivotement par un mécanisme comportant un carter d'engrenage 23 dont un arbre de sortie porte un pignon 24 engrenant avec un secteur denté 25 d'un bras de commande 26 lié en rotation avec le tourillon. The support system and pivoting of the chute shown in Figure 2 comprises, on each side of the chute, a bearing 22 in which the pin 2 is rotatably mounted along a horizontal axis A1, and pivotally driven by a mechanism comprising a gear case 23, an output shaft carries a pinion 24 meshing with a toothed sector 25 of a control arm 26 connected in rotation with the pin.
[0025] Sur l'extrémité frontale externe 29 du tourillon 2, c'est à dire la face d'extrémité du tourillon opposée à l'extrémité comportant le logement 21 pour les pattes 1 1 de la goulotte 1 , des joints tournants 28 sont raccordés, pour y raccorder des conduits servant au refroidissement interne des tourillons. On voit également, en position excentrée par rapport à l'axe A1 , l'extrémité 32, conformée en hexagone, de la goupille 3 opposée au téton excentré 31 qui coopère avec la patte 1 1 de la goulotte pour la bloquer dans son logement 21 , comme indiqué au début de ce mémoire en relation avec la figure 1 , et les moyens 4 de blocage en rotation de la goupille 3 sur le tourillon, qui comportent particulièrement une plaque d'indexation 41 et une plaquette de verrouillage 42. On the outer end 29 of the pin 2, that is to say the end face of the pin opposite the end having the housing 21 for the legs 1 1 of the chute 1, rotating joints 28 are connected to connect ducts for internal cooling of the trunnions. We also see, in eccentric position with respect to the axis A1, the end 32, shaped in hexagon, the pin 3 opposite the eccentric pin 31 which cooperates with the tab 1 1 of the chute to block it in its housing 21 , as indicated at the beginning of this memo in relation with FIG. 1, and the means 4 for locking in rotation of the pin 3 on the journal, which particularly comprise an indexing plate 41 and a locking plate 42.
[0026] Sur la figure 3 montrant un tourillon en coupe axiale, on voit le tourillon 2 monté rotatif dans le palier 22 selon l'axe horizontal A1 , ainsi que le logement 21 destiné à recevoir la patte 1 1 de la goulotte, et un canal axial de refroidissement 27 sur lequel est connecté le joint tournant 28. In Figure 3 showing a journal in axial section, we see the journal 2 rotatably mounted in the bearing 22 along the horizontal axis A1, and the housing 21 intended to receive the tab 1 1 of the chute, and an axial cooling channel 27 on which is connected the rotary joint 28.
[0027] La goupille 3 est monté tournante et coulissante dans un alésage d'axe A2 du tourillon parallèle et excentré par apport à l'axe A1 . Son extrémité interne, située vers la goulotte, comporte le téton excentré 31 qui, en position de blocage de la goulotte, dépasse axialement dans le logement 21 pour s'engager dans le trou ménagé à cet effet dans la patte 1 1 de la goulotte. A son extrémité externe 32, opposée au téton 31 , la goupille est conformée selon un hexagone 321 qui est engagé avec un trou en forme de double hexagone 41 1 réalisé dans la plaque d'indexation 41 , et dépasse de cette plaque de manière à pouvoir y placer une clé de serrage pour faire tourner la goupille 3 selon son axe A2 et ainsi faire tourner le téton excentré et bloquer la patte de la goulotte dans son logement, comme indiqué précédemment. La plaque d'indexation 41 est logée dans un logement 5 ménagé à cet effet dans l'extrémité frontale externe du tourillon, et en étant fixée au fond de ce logement, bloque axialement la goupille pour empêcher que le téton excentré se dégage du trou de la patte de la goulotte par un coulissement axial de la goupille. The pin 3 is rotatably and slidably mounted in a bore of axis A2 of the journal parallel and eccentric by contribution to the axis A1. Its inner end, located towards the chute, comprises the eccentric pin 31 which, in the locked position of the chute, protrudes axially in the housing 21 to engage in the hole provided for this purpose in the tab 1 1 of the chute. At its outer end 32, opposite to the pin 31, the pin is shaped according to a hexagon 321 which is engaged with a hole in the form of a double hexagon 41 1 made in the indexing plate 41, and protrudes from this plate so as to be able to place a wrench to turn the pin 3 along its axis A2 and thus rotate the eccentric pin and block the leg of the chute in its housing, as indicated above. The indexing plate 41 is housed in a housing 5 formed for this purpose in the outer end of the trunnion, and being fixed to the bottom of this housing, axially blocks the pin to prevent the eccentric pin from emerging from the hole the leg of the chute by axial sliding of the pin.
[0028] Comme on le voit bien sur les figures 4 et 5, la plaque d'indexation 41 comporte deux bras 412, 413 s'étendant dans des directions sensiblement diamétralement opposés, dans lesquels sont formés des lumières oblongues 414 en arcs de cercle centrés sur l'axe A2 de la goupille. Des boulons de fixation 415, passant dans ces lumières et vissés dans le tourillon permettent de serrer la plaque d'indexation 41 sur une paroi frontale 51 constituant le fond du logement 5, immobilisant ainsi en rotation la plaque d'indexation, et donc la goupille. As can be seen in FIGS. 4 and 5, the indexing plate 41 comprises two arms 412, 413 extending in substantially diametrically opposite directions, in which oblong slots 414 are formed in centered circular arcs. on the A2 axis of the pin. Fastening bolts 415, passing through these slots and screwed into the trunnion, make it possible to tighten the indexing plate 41 on a front wall 51 constituting the bottom of the housing 5, thereby immobilizing the indexing plate, and thus the pin, in rotation. .
[0029] Un des bras 413 porte à son extrémité une denture droite 416 en forme d'arc de cercle, centré sur l'axe A2, qui s'engage avec une denture correspondante 421 formée sur la plaquette de verrouillage 42. La plaquette de verrouillage 42 comporte une lumière oblongue 422 dans laquelle passe un boulon 423 de fixation de la plaquette dans le logement 5 du tourillon. One of the arms 413 carries at its end a right-angle toothing 416 in the form of an arc of a circle, centered on the axis A2, which engages with a corresponding toothing 421 formed on the locking plate 42. The wafer of FIG. lock 42 has an oblong slot 422 in which passes a bolt 423 for fixing the plate in the housing 5 of the pin.
[0030] La plaquette de verrouillage 42 est logée dans une partie 52 du logement 5 comportant une paroi latérale 53 agencée pour recevoir en butée une des extrémités 424, 425 de la plaquette 42. Le logement 5 comporte par ailleurs deux parois latérales 54, 55 confrontant les faces latérales des bras 412 et 413, mais agencées de manière que subsiste globalement entre lesdits bras et lesdites parois latérales des jeux j1 , j2 permettant un débattement angulaire global j1 +j2 de la plaque d'indexation égal, ou légèrement supérieur, à 30°, nécessaire pour permettre de placer la plaque d'indexation 41 à la fois dans le logement 5 et sur l'extrémité 32 hexagonale de la goupille 2, quelle que soit la position angulaire de ladite goupille. The locking plate 42 is housed in a portion 52 of the housing 5 having a side wall 53 arranged to abut one of the ends 424, 425 of the wafer 42. The housing 5 further comprises two side walls 54, 55 confronting the lateral faces of arms 412 and 413, but arranged so that there remains overall between said arms and said side walls games j1, j2 allowing an overall angular clearance j1 + j2 of the index plate equal to, or slightly greater than, 30 °, necessary to allow to place the plate d indexing 41 in both the housing 5 and the hexagonal end 32 of the pin 2, regardless of the angular position of said pin.
[0031 ] Comme on le voit sur les figures 6 et 7, les extrémités 424, 425 de la plaquette de fixation sont décalées d'un demi-pas par rapport à la denture, de manière que, par un retournement de la plaquette, on puisse assurer au mieux, et quelle que soit la position angulaire de la goupille et de la plaque d'indexation, à la fois l'engagement des dentures de la plaque d'indexation et de la plaquette de verrouillage, et la butée de la plaquette de verrouillage contre la paroi latérale 53 de son logement. Ainsi, si, du fait de la position angulaire où se trouve la goupille après avoir bloqué la goulotte par la rotation de la dite goupille, l'engagement des dentures, alors que la plaquette de verrouillage se trouve placé dans un premier sens, conduirait à un jeu entre l'extrémité 424 de la plaquette et la paroi latérale 53 comme représenté figure 6, il est possible de supprimer ou au moins réduire ce jeu en retournant la plaquette de sorte que c'est alors l'autre extrémité 425 qui se trouve en butée, sans jeu, contre la paroi latérale 53, comme représenté figure 7. As seen in Figures 6 and 7, the ends 424, 425 of the fixing plate are offset by a half-step relative to the toothing, so that by a reversal of the plate, it is can best ensure, and regardless of the angular position of the pin and the index plate, both the engagement of the teeth of the indexing plate and the locking plate, and the stop of the wafer locking against the side wall 53 of its housing. Thus, if, because of the angular position where the pin is located after having locked the chute by the rotation of said pin, the engagement of the teeth, while the locking plate is placed in a first direction, would lead to a clearance between the end 424 of the wafer and the side wall 53 as shown in FIG. 6, it is possible to eliminate or at least reduce this game by turning the wafer so that it is then the other end 425 which is located in abutment, without play, against the side wall 53, as shown in FIG.
[0032] Pour mettre en place une goulotte 1 , les pattes 1 1 de celle-ci sont placées dans les logements 21 des tourillons 2 de support. Ensuite, de chaque côté, la goupille 3 est poussée axialement de manière à faire pénétrer le téton excentré 31 dans le trou de la patte 1 1 . Au moyen d'une clé engagée sur l'extrémité 32 à six pans de la goupille, on fait tourner la goupille jusqu'à ce que le téton 31 bloque la patte 1 1 dans le logement 21 . Dans cette position, on ajuste la plaque d'indexation 41 sur l'hexagone 321 de l'extrémité de la goupille de manière que ladite plaque s'insère dans le logement 5 de l'extrémité frontale du tourillon avec un jeu minimum, et on serre les boulons 415 de manière à serrer la plaque d'indexation 41 contre le fond 51 de son logement, immobilisant ainsi la goupille axialement et en rotation. La plaquette de verrouillage 42 est alors positionnée, dans le sens assurant un jeu nul ou minimal entre l'extrémité 424 ou 425 de la plaquette et la paroi 53 de son logement, et le boulon 423 de maintien de la plaquette est serré. [0033] Grâce aux différentes positons angulaires relatives entre la goupille et la plaque d'indexation, qui peuvent être obtenues par engagement de la forme en double hexagone de la plaque d'indexation avec la forme hexagonale 321 de l'extrémité de la goupille, et grâce aux dentures 416, 421 qui peuvent s'engager respectivement avec un pas angulaire correspondant au pas de la denture, et grâce à la possibilité de retournement de la plaquette de verrouillage, on peut finalement assurer un verrouillage fiable et pratiquement sans jeu de la goupille quelle que soit sa position angulaire. De plus comme déjà indiqué, une triple sécurité existe permettant d'éviter la chute de la goulotte, même dans le cas où la plaquette de verrouillage viendrait à disparaître et que les boulons de la plaque d'indexation viendraient à se desserrer. To set up a chute 1, the tabs 1 1 thereof are placed in the housing 21 of the support pins 2. Then, on each side, the pin 3 is pushed axially so as to penetrate the eccentric pin 31 into the hole of the lug 1 January. By means of a key engaged on the end 32 of the pin, the pin is rotated until the pin 31 blocks the tab 1 1 in the housing 21. In this position, the indexing plate 41 is adjusted on the hexagon 321 of the end of the pin so that said plate fits into the housing 5 of the front end of the pin with a minimum clearance, and tightening the bolts 415 so as to clamp the indexing plate 41 against the bottom 51 of its housing, thereby immobilizing the pin axially and rotationally. The locking plate 42 is then positioned in the direction ensuring a zero or minimum clearance between the end 424 or 425 of the wafer and the wall 53 of its housing, and the bolt 423 holding the wafer is tight. Thanks to the different relative angular positions between the pin and the indexing plate, which can be obtained by engagement of the double hexagonal shape of the indexing plate with the hexagonal shape 321 of the end of the pin, and thanks to the teeth 416, 421 which can engage respectively with an angular pitch corresponding to the pitch of the toothing, and thanks to the possibility of reversal of the locking plate, it can finally ensure a reliable locking and virtually without play of the pin regardless of its angular position. In addition, as already indicated, a triple security exists to prevent the chute from falling, even in the case where the locking plate would disappear and that the bolts of the indexing plate would come to loosen.
[0034] L'invention n'est pas limitée au mode réalisation décrit ci-dessus à titre d'exemple. Au lieu d'une forme hexagonale de l'extrémité de la goupille pour permettre sa rotation par une clé, on pourrait utiliser toute autre forme adaptée à l'outil de serrage utilisé. Les formes hexagonales et double- hexagonales de la liaison entre la plaque d'indexation et la goupille pourrait aussi être remplacées par d'autres formes polygonales de même fonction, par exemple un carré sur la goupille et un double carré dans la plaque d'indexation, les jeux j1 et j2 étant alors adaptés en conséquence. The invention is not limited to the embodiment described above by way of example. Instead of a hexagonal shape of the end of the pin to allow its rotation by a key, one could use any other form adapted to the clamping tool used. The hexagonal and double-hexagonal shapes of the connection between the indexing plate and the pin could also be replaced by other polygonal shapes of the same function, for example a square on the pin and a double square in the indexing plate , games j1 and j2 being adapted accordingly.

Claims

Revendications claims
1 . Dispositif de blocage de la goulotte sur les extrémités des tourillons, dans une installation de chargement d'un four à cuve comportant une goulotte (1 ) de distribution de matières monté pivotante selon un axe horizontal (A1 ) par l'intermédiaire de tourillons (2) rotatifs dans des paliers (22) d'une virole de support ayant un axe de rotation vertical, la goulotte (1 ) étant liée aux tourillons (2) par des pattes (1 1 ) d'extrémité supérieure de la goulotte qui s'engagent dans des logements (21 ) aménagés sur des extrémités internes des tourillons et qui y sont bloquées par des goupilles (3) logées dans les tourillons et d'axe (A2) parallèle à l'axe des tourillons, chaque goupille (3) comportant à son extrémité interne orientée vers l'axe vertical un téton excentré (31 ) s'engageant avec une patte de la goulotte pour maintenir la patte bloquée au fond de son logement, et des moyens de verrouillage pour verrouiller la goupille en rotation, 1. Device for blocking the trough on the ends of the trunnions, in a charging installation of a shaft furnace comprising a material distribution trough (1) pivotably mounted along a horizontal axis (A1) via trunnions (2 ) rotating in bearings (22) of a supporting ferrule having a vertical axis of rotation, the chute (1) being connected to the journals (2) by tabs (1 1) of the upper end of the chute which s' engage in housings (21) arranged on inner ends of the journals and which are blocked by pins (3) housed in the trunnions and axis (A2) parallel to the axis of the trunnions, each pin (3) comprising at its inner end oriented towards the vertical axis an eccentric stud (31) engaging with a tab of the chute to keep the tab locked at the bottom of its housing, and locking means for locking the pin in rotation,
caractérisé en ce que chaque goupille (3) comporte, à son extrémité externe opposée au téton, des moyens (32) de réglage en rotation et de serrage, pour pouvoir presser avec un effort suffisant le téton sur la patte de la goulotte par une rotation de la goupille, et les moyens de verrouillage (4) comportent une plaque d'indexation (41 ) liée en rotation sur l'extrémité de la goupille, la plaque d'indexation comportant par ailleurs des dentures (416) agencées pour coopérer avec des dentures (421 ) correspondantes d'un verrou (42) solidarisé sur le tourillon (2), de manière que ledit verrou puisse immobiliser en rotation la goupille dans une pluralité de positions circonférentielles de ladite goupille.  characterized in that each pin (3) has, at its outer end opposite the pin, means (32) for adjusting in rotation and clamping, to be able to press with sufficient force the pin on the leg of the chute by a rotation of the pin, and the locking means (4) comprise an indexing plate (41) rotatably connected to the end of the pin, the indexing plate further comprising teeth (416) arranged to cooperate with teeth (421) corresponding to a latch (42) secured to the trunnion (2), so that said latch can immobilize in rotation the pin in a plurality of circumferential positions of said pin.
2. Dispositif selon la revendication 1 , dans lequel la plaque d'indexation (41 ) est liée en rotation à la goupille par des moyens de liaison en rotation (321 , 41 1 ) agencés pour assurer la liaison en rotation selon différentes positions angulaires relatives. 2. Device according to claim 1, wherein the indexing plate (41) is rotatably connected to the pin by means of rotational connection (321, 41 1) arranged to ensure the connection in rotation at different relative angular positions. .
3. Dispositif selon la revendication 2, dans lequel les moyens de liaison en rotation comportent une forme polygonale (321 ) réalisée sur la goupille, coopérant avec une découpe (41 1 ) de forme adaptée réalisée dans la plaque d'indexation (41 ). 3. Device according to claim 2, wherein the rotational connection means comprise a polygonal shape (321) formed on the pin cooperating with a cutout (41 1) of suitable shape formed in the index plate (41).
4. Dispositif selon la revendication 3, dans lequel la forme polygonale (321 ) de la goupille se prolonge vers l'extrémité externe de la goupille pour servir également de moyens de réglage en rotation et de serrage. 4. Device according to claim 3, wherein the polygonal shape (321) of the pin extends towards the outer end of the pin to also serve as means for adjusting rotation and clamping.
5. Dispositif selon la revendication 3, dans lequel la forme polygonale de la goupille est hexagonale (321 ) et la découpe de la plaque d'indexation est en forme de double hexagone (41 1 ). 5. Device according to claim 3, wherein the polygonal shape of the pin is hexagonal (321) and the cutting of the index plate is in the form of double hexagon (41 1).
6. Dispositif selon la revendication 1 , dans lequel la plaque d'indexation (41 ) est fixée sur une extrémité frontale externe du tourillon, et sert de butée axiale de la goupille (3). 6. Device according to claim 1, wherein the indexing plate (41) is fixed on an outer end of the trunnion, and serves as axial abutment of the pin (3).
7. Dispositif selon la revendication 1 ou 6, dans lequel la plaque d'indexation (41 ) est fixée sur le tourillon (2) par des boulons (415) passant dans des lumières (414) de la plaque d'indexation, lesdites lumières étant en forme d'arc de cercle centrés sur l'axe de rotation (A2) de la goupille. 7. Device according to claim 1 or 6, wherein the indexing plate (41) is fixed on the pin (2) by bolts (415) passing through slots (414) of the index plate, said lights being in the shape of a circular arc centered on the axis of rotation (A2) of the pin.
8. Dispositif selon la revendication 1 , dans lequel le verrou comporte une plaquette (42) comportant les dentures (421 ) s'engageant avec les dentures (416) de la plaque d'indexation (41 ). 8. Device according to claim 1, wherein the lock comprises a plate (42) having the teeth (421) engaging with the teeth (416) of the indexing plate (41).
9. Dispositif selon la revendication 8, dans lequel les dentures (416 ; 421 ) de la plaque d'indexation (41 ) et de la plaquette de verrou (42) sont arrangées selon des arcs de cercles centrés sur l'axe de rotation (A2) de la goupille. 9. Device according to claim 8, wherein the teeth (416; 421) of the indexing plate (41) and the latch plate (42) are arranged in arcs of circles centered on the axis of rotation ( A2) of the pin.
10. Dispositif selon la revendication 8, dans lequel la plaquette de verrou (42) est fixée sur l'extrémité frontale externe du tourillon par des boulons (423) passant dans des lumières (422) de la plaquette de verrou, lesdites lumières étant en forme d'arcs de cercle centrés sur l'axe de rotation de la goupille. The device of claim 8, wherein the latch plate (42) is attached to the outer end end of the trunnion by bolts (423) passing through slots (422) of the latch plate, said slots being shape of arcs centered on the axis of rotation of the pin.
1 1 . Dispositif selon l'une quelconque des revendications 8 à 10, comportant des moyens de butée latérale (53) pour limiter la course de la plaquette (42) dans la direction circonférentielle. 1 1. Apparatus according to any one of claims 8 to 10, including lateral stop means (53) for limiting the stroke of the wafer (42) in the circumferential direction.
12. Dispositif selon la revendication 1 1 , dans lequel les moyens de butée latérale comportent une paroi latérale (53) d'un logement (52) formé dans l'extrémité frontale externe du tourillon (2) et dans lequel la plaquette de verrou (42) est fixée, ladite paroi latérale (53) du logement servant de butée pour une extrémité (424, 425) de la plaquette. 12. Device according to claim 1 1, wherein the lateral abutment means comprise a side wall (53) of a housing (52) formed in the outer end of the trunnion (2) and in which the lock plate ( 42) is fixed, said housing side wall (53) serving as a stop for one end (424, 425) of the wafer.
13. Dispositif selon la revendication 12, dans lequel les extrémités (424, 425) de la plaquette sont décalées d'un demi pas de denture par rapport à la denture (421 ) de la plaquette. 13. Device according to claim 12, wherein the ends (424, 425) of the wafer are offset by a half pitch of teeth with respect to the toothing (421) of the wafer.
14. Dispositif selon la revendication 8, dans lequel la plaque d'indexation (41 ) est logée dans un logement (5) formé sur l'extrémité frontale du tourillon, le logement comportant des parois latérales (54, 55) qui constituent des butés de pivotement de la plaque d'indexation, avec un jeu angulaire suffisant pour permettre de placer la plaque d'indexation dans son logement quelque soit la position angulaire de la goupille. 14. Device according to claim 8, wherein the indexing plate (41) is housed in a housing (5) formed on the front end of the pin, the housing having side walls (54, 55) which constitute stops pivoting of the indexing plate, with sufficient angular clearance to allow to place the indexing plate in its housing regardless of the angular position of the pin.
15. Dispositif selon la revendication 14 en combinaison avec la revendication 5, dans lequel, le jeu angulaire (j1 , j2) entre la plaque d'indexation et les parois latérales (54, 55) de son logement est de 30 degrés. 15. Device according to claim 14 in combination with claim 5, wherein the angular clearance (j1, j2) between the index plate and the side walls (54, 55) of its housing is 30 degrees.
EP15733745.2A 2014-07-07 2015-07-02 Device for immobilising the chute on the ends of trunnions in an apparatus for loading a shaft furnace Active EP3167083B1 (en)

Applications Claiming Priority (2)

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LU92494A LU92494B1 (en) 2014-07-07 2014-07-07 DEVICE FOR LOCKING THE CHUTE ON THE ENDS OF THE TRUNKS, IN A TANK OVEN LOADING SYSTEM
PCT/EP2015/065109 WO2016005266A1 (en) 2014-07-07 2015-07-02 Device for immobilising the chute on the ends of journals in an apparatus for loading a shaft furnace

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EP3167083B1 EP3167083B1 (en) 2018-01-31

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LU91844B1 (en) * 2011-07-22 2013-01-23 Wurth Paul Sa Charging device for shaft furnace
KR101277883B1 (en) * 2011-09-28 2013-06-21 현대제철 주식회사 Rotatingchute apparatus for blast furnace
CN103215395B (en) * 2012-01-19 2015-04-29 秦皇岛秦冶重工有限公司 Blast furnace top chute distributing device
LU92045B1 (en) * 2012-07-18 2014-01-20 Wurth Paul Sa Rotary charging device for shaft furnace
LU92046B1 (en) * 2012-07-18 2014-01-20 Wurth Paul Sa Rotary charging device for shaft furnace

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CN106661641B (en) 2019-01-18
TW201619565A (en) 2016-06-01
UA118598C2 (en) 2019-02-11
JP6517842B2 (en) 2019-05-22
BR112016030636B1 (en) 2022-08-23
KR20170026366A (en) 2017-03-08
WO2016005266A1 (en) 2016-01-14
US20170175211A1 (en) 2017-06-22
EA031944B1 (en) 2019-03-29
CA2950674A1 (en) 2016-01-14
TWI654403B (en) 2019-03-21
BR112016030636A8 (en) 2021-03-16
LU92494B1 (en) 2016-01-08
CN106661641A (en) 2017-05-10
KR102407929B1 (en) 2022-06-10
EP3167083B1 (en) 2018-01-31
JP2017526807A (en) 2017-09-14
EA201790139A1 (en) 2017-06-30
US9926614B2 (en) 2018-03-27
CA2950674C (en) 2022-03-01

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