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

EP0345407B1 - Method for regulating the flow in a sliding gate and sliding gate for carrying ou this method - Google Patents

Method for regulating the flow in a sliding gate and sliding gate for carrying ou this method Download PDF

Info

Publication number
EP0345407B1
EP0345407B1 EP88870106A EP88870106A EP0345407B1 EP 0345407 B1 EP0345407 B1 EP 0345407B1 EP 88870106 A EP88870106 A EP 88870106A EP 88870106 A EP88870106 A EP 88870106A EP 0345407 B1 EP0345407 B1 EP 0345407B1
Authority
EP
European Patent Office
Prior art keywords
opening
plate
axis
fixed
mobile
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.)
Expired - Lifetime
Application number
EP88870106A
Other languages
German (de)
French (fr)
Other versions
EP0345407A1 (en
Inventor
Philippe Mutsaarts
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.)
Hepworth Refractories (Belgium) SA
Original Assignee
Hepworth Refractories (Belgium) 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8200690&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0345407(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Hepworth Refractories (Belgium) SA filed Critical Hepworth Refractories (Belgium) SA
Priority to ES198888870106T priority Critical patent/ES2030535T3/en
Priority to EP88870106A priority patent/EP0345407B1/en
Priority to DE8888870106T priority patent/DE3868404D1/en
Priority to AT88870106T priority patent/ATE72528T1/en
Priority to BR898902718A priority patent/BR8902718A/en
Priority to FI892813A priority patent/FI892813A/en
Priority to JP1145503A priority patent/JPH0230367A/en
Publication of EP0345407A1 publication Critical patent/EP0345407A1/en
Priority to US07/544,056 priority patent/US5076476A/en
Publication of EP0345407B1 publication Critical patent/EP0345407B1/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
    • B22D41/38—Means for operating the sliding gate

Definitions

  • the present invention relates to a method for adjusting the flow rate of a liquid, in particular of a molten material, between a maximum flow rate and a zero flow rate, in a valve comprising at least one fixed plate and a mobile plate superposed, constantly kept in contact, each having at least one opening, this process consisting in placing said openings more or less opposite one another by moving the aforementioned movable plate.
  • valves or obturators currently known, in particular those used in the steel industry and in particular for continuous casting, are divided into two types, namely a first type of valve whose movable plate is moved in a rectilinear direction and in two directions to form a drawer system and a second type of valve whose movable plate is driven in a circular motion to present, in both directions, its opening or openings facing or away from an opening made in the fixed plate.
  • valves or shutters whatever their type, have first of all the serious drawback of causing, during movements of the movable plate and especially during movements aimed at reducing or interrupting the jet of liquid, wear which is located on a relatively small portion of the edges of the opening of the movable plate, which, on the one hand, requires increasing, as and as wear, the amplitude of movement of the movable plate to a given flow rate and, on the other hand, leads to an increasingly significant deflection of the jet, which has the consequence of increasing the turbulence and promoting the deposition of chemical compounds and / or of solidified metal under the fixed plate and in the collecting nozzle associated with the opening of the latter, with the effect of further increasing the disturbance of the jet and this, until the latter is interrupted.
  • valve make it necessary to replace movable plates, which are costly elements, while requiring the valve to be switched off and entailing a non-negligible labor cost, whereas these movable plates are not only partially worn or degraded.
  • valves have other serious drawbacks and in particular: significant risks of damage due to tensions which are not homogeneous due to the irregular heating of the various masses irregularly distributed around the opening of the movable plate and possibly the fixed plate; risks of degradation, for the same reason, due to the different heat losses within the plates and, finally, risks of degradation due to localized heating in extremely reduced zones and always the same of the movable plate.
  • the object of the invention is to remedy these drawbacks and to provide a method which makes it possible to regularly distribute the wear over at least a large part of the periphery of the opening of the movable plate of the valve in order to increase its longevity. while improving in particular the qualities of the jet and eliminating the drawbacks due to disturbances thereof, with the significant possibility of varying, continuously or discontinuously, the zones subjected to heating.
  • said method consists in moving this movable plate in at least two intersecting directions which are determined to at least partially compare the openings of the fixed and movable plates, during the opening of the valve.
  • the invention also relates to a valve in the plates of which the tensions are homogeneous, these plates also having the advantage of offering a balanced heat distribution.
  • this valve has at least its movable plate which is symmetrical with respect to at least one plane passing through the axis of its opening.
  • the fixed and mobile plates of the valve are identical, which significantly reduces the manufacturing and operating costs.
  • Figure 1 is a schematic plan view illustrating the above process and showing the four extreme positions and some intermediate positions that can occupy the opening of the movable plate when the latter is moved in two secant rectilinear directions, which are perpendicular and which intersect the axis of the opening of the fixed plate, the latter opening being shown in solid lines, while the opening of the movable plate is shown in broken lines.
  • Figure 2 is a schematic plan view showing some of the extreme and intermediate positions that can occupy the opening of the movable plate when the latter is moved in concentric circular directions whose center is located outside the projection of the opening of the fixed plate on the movable plate and in rectilinear directions passing through the aforementioned center, one of these circular directions and one of these rectilinear directions intersecting the axis of the opening of the fixed plate, the latter being shown in line full, while the opening of the movable plate is shown in broken lines.
  • Figure 3 is a view similar to Figures 1 and 2 showing various positions that can occupy the opening of the movable plate when the latter is moved in concentric circular directions whose center is located on the axis of the opening of the fixed plate and following rectilinear directions passing through this center.
  • Figure 4 is a view similar to the previous figures and shows various positions that can occupy the opening of the movable plate when the latter is moved in a rectilinear direction intersecting the axis of the opening of the fixed plate and a circular direction whose center is located on the axis of the opening of the movable plate.
  • Figure 5 is a schematic view of the movable plate of a valve according to the invention and means ensuring the movement of this plate in the directions defined in Figure 2, the opening of the fixed plate being shown in broken lines.
  • FIG. 6 is a view similar to FIG. 5 and represents the movable plate of a valve as well as the drive means of the latter that are arranged to move said plate in the directions defined in FIG. 3.
  • FIG. 7 is also a view similar to FIGS. 5 and 6 of a valve whose movable plate is moved in the directions defined in FIG. 4.
  • FIGs 8 and 9 illustrate two variants of the valves shown in Figures 5 to 7.
  • FIGS 10 and 11 show details of plates fitted to valves according to the invention.
  • the process according to the invention and illustrated in the drawings is intended for adjusting the flow rate of a liquid, more particularly of a molten material, in particular in a continuous casting installation, between a maximum flow rate and a zero flow rate using a valve 1 which comprises at least one fixed plate 2 and a mobile plate 3, these plates 2 and 3, which are superimposed, being kept constantly in contact and each having an opening 4 (for the fixed plate) and 5 (for the mobile plate).
  • a valve 1 which comprises at least one fixed plate 2 and a mobile plate 3, these plates 2 and 3, which are superimposed, being kept constantly in contact and each having an opening 4 (for the fixed plate) and 5 (for the mobile plate).
  • the movable plate 3 is disposed between two fixed upper 2 and lower 2 ′ plates in order to be in contact with each of the latter, the openings 4 and 4 ′ of the fixed plates being coaxial and either of identical sections (see figure 10), or of different sections (see figure 11).
  • the opening 4 ′ of the fixed plate 2 ′ has a cross section greater than that of the opening 4 of the fixed plate 2 so that the liquid contained in the opening 5 of the movable plate 3, the cross section of which is identical to that from the opening 4 of the fixed plate 2, can escape through the opening 4 ′ after the valve has closed.
  • This feature is important when the valve is used for pouring molten metal, because it prevents metal from solidifying in the opening 5 of the movable plate 3 after closing the valve and rendering the latter unusable during a next opening of the valve, because of the plug created in the aforementioned opening 5.
  • the same result could be obtained, as shown in Figure 10, by using two fixed plates 2 and 2 ′ whose openings 4 and 4 ′ have the same section.
  • an opening 5 is then provided having its orifice facing the plate 2 which has an area equal to that of the opening 4 of the plate 2 while its orifice facing the plate 2 ′ has an area greater than that of the opening 4 ′ of the fixed plate 2 ′.
  • plates 2, 2 ′ and 3 which are symmetrical with respect to at least one plane passing through the axis 8, 11 of their opening 4.4 ′ and 5.
  • plates 2, 2 ′ and 3 which are symmetrical with respect to at least one plane passing through the axis 8, 11 of their opening 4.4 ′ and 5.
  • plates 2, 2 ′ and 3 which are symmetrical with respect to at least one plane passing through the axis 8, 11 of their opening 4.4 ′ and 5.
  • plates 2, 2 ′ and 3 which are symmetrical with respect to at least one plane passing through the axis 8, 11 of their opening 4.4 ′ and 5.
  • the method according to the invention consists in moving, as shown in FIG. 1, this movable plate 3 following two intersecting rectilinear directions shown diagrammatically by the axis lines 6 and 7 and which are determined to bring, when the valve 1 opens, partially and completely opposite, the openings 4 and 5 of the fixed plates 2 and movable 3.
  • this movable plate 3 following two intersecting rectilinear directions shown diagrammatically by the axis lines 6 and 7 and which are determined to bring, when the valve 1 opens, partially and completely opposite, the openings 4 and 5 of the fixed plates 2 and movable 3.
  • the rectilinear direction 6 intersects the axis 8 of the opening 4 of the fixed plate and the circular direction 7 has its center 9 located on the aforementioned axis 8;
  • the rectilinear direction 6 cuts the axis 8 of the opening 4 of the fixed plate 2 while the circular direction 7 cuts or not this axis 8 and has its center 9 which is located inside the projection of the opening 4 of the fixed plate 2 on the movable plate 3;
  • the straight direction 6 cuts the axis 8 of the opening 4 of the fixed plate while the circular direction 7, which cuts or not this axis 8, has its center 9 which is located outside of the projection of the opening 4 of the fixed plate on the movable plate 3;
  • the circular direction 7 cuts the axis 8 of the opening 4 of the fixed plate and has its center 9 which is located outside the projection of the opening 4 on the movable plate 3, while the rectilinear direction cuts or not this axis 8.
  • the method according to the invention allows, when the openings 4 and 5 of the fixed and movable plates are not completely facing each other in order to throttle the jet, in a drawer system, as shown in FIGS. 4 and 7, just as in the system as illustrated in FIG. 9 and which will be described below, of varying, step by step or continuously, the zone 10 of the movable plate in contact with the molten metal, so as to obtain a better balancing of tensions in the moving plate.
  • the movable plate 3 is moved in a rectilinear direction 6 which intersects the axis 8 of the opening 4 of the fixed plate 2 and in a secant circular direction 7 to direction 6 and who has its center 9 which is located on the axis 11 of the movable plate 3.
  • the movements of the movable plate 3 in the above directions can be programmed to either be carried out simultaneously, or be carried out successively in a determined order or not, these movements can also be carried out, for some or all of the above directions, in the both directions.
  • the valve 1 according to the invention is shown diagrammatically in FIGS. 5 to 9, either by its two fixed 2 and mobile 3 plates and by its means 12 making it possible to move the mobile plate 3 in at least two secant directions 6 and 7 above, or by the axis 8 of the opening 4 of the fixed plate 2, by the movable plate 3 and by said means 12.
  • the valve 1 shown in FIG. 5 is provided with means 12 which make it possible to move the movable plate 3 in rectilinear directions 6, 6 ′ ...- n and concentric circular directions 7,7 ′ .... 7 n such as described above and illustrated in FIG. 2.
  • These means 12 consist, on the one hand, of a first jack 13, mounted for rotation about a fixed axis 14 which is parallel to the axis 11 of the opening 5 of the movable plate 3, the free end of the piston rod 15 of which carries the movable plate 3 so that the axis 16 of the jack 13 intersects the axis of the opening 5 of the movable plate 3 and, on the other hand, by a second cylinder 17, whose axis 18 is parallel to the axis 16 of the cylinder 13 and whose cylinder 19 is fixed to the cylinder 20 of said cylinder 13, which has the free end of its piston rod 21 which moves in a horizontal buttonhole 22 produced in a fixed part 23.
  • the valve 1 shown in Figure 6 is provided with means 12 for moving the movable plate 3 in rectilinear directions 6, 6 ′ ... 6 n and concentric circular directions 7,7 ′ ... 7 n as described above and shown in figure 3.
  • These means 12 comprise a slide 24 in which the movable plate 3 is fixed and which is mounted, so as to be able to move parallel to itself, in a frame 25 in the form of a quadrilateral at right angles.
  • This slide 24 is fixed to the end of the piston rod 26 of a jack 27 whose axis intersects the axis of the opening 5 of the movable plate 3 and which is parallel to one of the sides of the frame 25.
  • This frame 25 and the cylinder 28 of the jack 27 are fixed to a circular ring 29 whose axis is parallel to the axis of the opening 5 of the movable plate 3 or coincides with this latter axis and this, depending on the position occupied by the slide 24 relative to the frame 25 with which it cooperates, a gear motor 30, which is fixed, being provided to drive the crown 29, as well as the frame 25 and the jack 27 which are fixed there, around its axis .
  • FIG. 7 shows a valve 1 according to the invention, the above-mentioned means 12 making it possible to move the movable plate 3 in the rectilinear direction 6 intersecting the axis 11 of the opening 5 of the movable plate 3 and in a circular direction 7 whose the center 9 is located on this axis 11 (see Figure 4).
  • This movable plate 3 is mounted on a support 31 arranged so that it can rotate freely around the aforementioned axis 11.
  • the support 31 is slidably mounted on a support 32, on which it can move freely and parallel to itself in the above-mentioned rectilinear direction 6 and is controlled by the piston rod 33 of a jack 34, which is fixed and whose axis is perpendicular to the axis 11 of the opening 5.
  • a ring gear 35 is associated with the periphery of the movable plate 3 and is coaxial with the opening 5, an endless screw 36 parallel to the direction 6 being provided to drive in rotation, under the control of a gear motor 37, the crown and the movable plate 3 which is fixed there around the axis 11.
  • the valve 1 shown in FIG. 8 is a variant of the valve illustrated in FIG. 5.
  • the movable plate 3 is fixed, at 38 and 39, to the piston rod 40 of a jack 41 whose cylinder is pivotally mounted around a fixed axis 42 parallel to the axis 11 of the opening 5 of the movable plate 3, the axis of the jack 41 being perpendicular to said axis 11.
  • the end 43 of the piston rod 40 is articulated, at 44 and around an axis parallel to the axis 11, at the free end of the piston rod of a jack 46 whose cylinder is pivotally mounted around a fixed axis 47, parallel to axis 11.
  • the valve 1 illustrated in Figure 9 has a movable plate 3 whose movements are caused by means 12 which include a first frame 48, in the form of a quadrilateral whose angles are straight, on one side of which is mounted a worm 49 arranged to move the movable plate 3 in the first frame 48, by means of a nut 53 fixed to the support 54 of the plate 3 in a direction parallel to this side 50.
  • This frame 48 is mounted in a second fixed frame 51, in the form of a quadrilateral whose angles are straight, on one side of which is mounted an endless screw 52 arranged to move the frame 48 in the frame 51, by means of a nut 55 fixed to the frame 48, in a direction perpendicular to the side 50 said frame 48 above, the axis of the worms 49 and 52 being perpendicular.
  • the aforementioned zone 10 of the movable plate 3 in contact with the molten metal in a manner analogous to that shown in FIGS. 4 and 7, the movable plate can be rotated 3, around the axis 11 of its opening 5, in its support 54.
  • valve When the valve is used for molten metal, provision is advantageously made, as shown in FIG. 10, in at least one of the plates 2, 2 ′ and 3, a porous insert 56 through which a gas, such as l 'argon, under pressure.
  • This insert which leads to a gas supply duct, not shown, surrounds the opening of the plate, over at least a significant part of its thickness.
  • the movable plate 3 used in the aforementioned valves will advantageously be encircled by a metal jacket which will be provided with connecting members to the aforementioned means 12 ensuring the movements of said movable plate 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Sliding Valves (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Feeding And Guiding Record Carriers (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Fluid-Driven Valves (AREA)

Abstract

Method for regulating the flow of a liquid, in particular a molten material, between a maximum flow and zero flow, in a sliding gate (1) comprising at least one fixed plate (2) and a movable plate (3), placed one above the other and held constantly in contact, each having at least one opening (4, 5) which method consists in positioning more or less opposite one another the said openings (4, 5) by displacing the abovementioned movable plate (3), the displacements of this movable plate (3) being performed in at least two intersecting directions (6 and 7), which are determined in order to position the openings (4, 5), of the fixed (2) and movable (3) plates, at least partially opposite each other when the sliding gate is opened, and sliding gate for carrying out this method. <IMAGE>

Description

La présente invention est relative à un procédé de réglage du débit d'un liquide, en particulier d'une matière en fusion, entre un débit maximum et un débit nul, dans une vanne comprenant au moins une plaque fixe et une plaque mobile superposées, maintenues constamment en contact, présentant chacune au moins une ouverture, ce procédé, consistant à mettre plus ou moins en regard l'une de l'autre lesdites ouvertures en déplaçant la plaque mobile susdite.The present invention relates to a method for adjusting the flow rate of a liquid, in particular of a molten material, between a maximum flow rate and a zero flow rate, in a valve comprising at least one fixed plate and a mobile plate superposed, constantly kept in contact, each having at least one opening, this process consisting in placing said openings more or less opposite one another by moving the aforementioned movable plate.

Les vannes ou obturateurs connus actuellement, en particulier ceux utilisés en sidérurgie et notamment pour la coulée continue, sont répartis en deux types, à savoir un premier type de vanne dont la plaque mobile est mue suivant une direction rectiligne et dans deux sens pour former un système à tiroir et un second type de vanne dont la plaque mobile est animée d'un mouvement circulaire pour présenter, dans les deux sens, sa ou ses ouvertures en regard ou à l'écart d'une ouverture réalisée dans la plaque fixe.The valves or obturators currently known, in particular those used in the steel industry and in particular for continuous casting, are divided into two types, namely a first type of valve whose movable plate is moved in a rectilinear direction and in two directions to form a drawer system and a second type of valve whose movable plate is driven in a circular motion to present, in both directions, its opening or openings facing or away from an opening made in the fixed plate.

Ces vannes ou obturateurs connus, quel que soit leur type, présentent tout d'abord le grave inconvénient de provoquer, lors des mouvements de la plaque mobile et surtout lors des mouvements visant à réduire ou à interrompre le jet de liquide, une usure qui est localisée sur une portion relativement réduite des bords de l'ouverture de la plaque mobile, ce qui, d'une part, oblige d'accroître, au fur et à mesure de l'usure, l'amplitude du mouvement de la plaque mobile pour un débit donné et, d'autre part, entraîne une déviation de plus en plus importante du jet, ce qui a pour conséquence d'augmenter les turbulences et de favoriser le dépôt de composés chimiques et/ou de métal solidifié sous la plaque fixe et dans la busette collectrice associée à l'ouverture de cette dernière, avec pour effet d'accroître encore la perturbation du jet et ce, jusqu'à interruption de ce dernier.These known valves or shutters, whatever their type, have first of all the serious drawback of causing, during movements of the movable plate and especially during movements aimed at reducing or interrupting the jet of liquid, wear which is located on a relatively small portion of the edges of the opening of the movable plate, which, on the one hand, requires increasing, as and as wear, the amplitude of movement of the movable plate to a given flow rate and, on the other hand, leads to an increasingly significant deflection of the jet, which has the consequence of increasing the turbulence and promoting the deposition of chemical compounds and / or of solidified metal under the fixed plate and in the collecting nozzle associated with the opening of the latter, with the effect of further increasing the disturbance of the jet and this, until the latter is interrupted.

Bien que l'on ait pensé, pour remédier à l'inconvénient précité, à déplacer la plaque mobile dans les deux sens des directions rectiligne (tiroir) ou circulaire (type rotatif), il n'en reste pas moins que, vu les trajectoires parcourues par la plaque mobile, il n'est pas possible de répartir l'usure sur toute la périphérie de la ou des ouvertures présentées par cette plaque mobile.Although it has been thought, to remedy the aforementioned drawback, to move the movable plate in both directions in the rectilinear (drawer) or circular (rotary type) directions, the fact remains that, given the trajectories traversed by the movable plate, it is not possible to distribute the wear over the entire periphery of the opening (s) presented by this movable plate.

Les deux types de vanne connus obligent donc de remplacer des plaques mobiles, qui sont des éléments coûteux, tout en nécessitant la mise hors circuit de la vanne et en entraînant un coût de main d'oeuvre non négligeable, alors que ces plaques mobiles ne sont que partiellement usées ou dégradées.The two known types of valve therefore make it necessary to replace movable plates, which are costly elements, while requiring the valve to be switched off and entailing a non-negligible labor cost, whereas these movable plates are not only partially worn or degraded.

En outre, ces vannes présentent d'autres inconvénients sérieux et notamment : risques non négligeables de dégradations dues à des tensions qui ne sont pas homogènes du fait de l'échauffement irrégulier des différentes masses irrégulièrement réparties autour de l'ouverture de la plaque mobile et éventuellement de la plaque fixe ; risques de dégradation, pour la même raison, dus aux déperditions calorifiques différentes au sein des plaques et, enfin, risques de dégradations dus à des échauffements localisés dans des zones extrêmement réduites et toujours les mêmes de la plaque mobile.In addition, these valves have other serious drawbacks and in particular: significant risks of damage due to tensions which are not homogeneous due to the irregular heating of the various masses irregularly distributed around the opening of the movable plate and possibly the fixed plate; risks of degradation, for the same reason, due to the different heat losses within the plates and, finally, risks of degradation due to localized heating in extremely reduced zones and always the same of the movable plate.

L'invention a pour but de remédier à ces inconvénients et de procurer un procédé qui permet de répartir régulièrement l'usure sur au moins une partie importante de la périphérie de l'ouverture de la plaque mobile de la vanne afin d'accroître sa longévité tout en améliorant en particulier les qualités du jet et en éliminant les inconvénients dus aux perturbations de celui-ci, avec la possibilité importante de faire varier, d'une manière continue ou discontinue, les zones soumises à échauffement.The object of the invention is to remedy these drawbacks and to provide a method which makes it possible to regularly distribute the wear over at least a large part of the periphery of the opening of the movable plate of the valve in order to increase its longevity. while improving in particular the qualities of the jet and eliminating the drawbacks due to disturbances thereof, with the significant possibility of varying, continuously or discontinuously, the zones subjected to heating.

A cet effet, suivant l'invention, ledit procédé consiste à déplacer cette plaque mobile suivant au moins deux directions sécantes que l'on détermine pour mettre au moins partiellement en regard les ouvertures des plaques fixe et mobile, lors de l'ouverture de la vanne.To this end, according to the invention, said method consists in moving this movable plate in at least two intersecting directions which are determined to at least partially compare the openings of the fixed and movable plates, during the opening of the valve.

L'invention a également pour objet une vanne dans les plaques de laquelle les tensions sont homogènes, ces plaques présentant en outre l'avantage d'offrir une répartition calorifique équilibrée.The invention also relates to a valve in the plates of which the tensions are homogeneous, these plates also having the advantage of offering a balanced heat distribution.

Suivant l'invention, cette vanne a au moins sa plaque mobile qui est symétrique par rapport à au moins un plan passant par l'axe de son ouverture.According to the invention, this valve has at least its movable plate which is symmetrical with respect to at least one plane passing through the axis of its opening.

Avantageusement, suivant l'invention, les plaques fixe et mobile de la vanne sont identiques, ce qui réduit, de manière notable, les coûts de fabrication et d'exploitation.Advantageously, according to the invention, the fixed and mobile plates of the valve are identical, which significantly reduces the manufacturing and operating costs.

D'autres détails et particularités de l'invention ressortiront des dessins annexés au présent mémoire et qui illustrent de manière non limitative le procédé susdit et représentent des formes de réalisation particulières de la vanne suivant l'invention.Other details and particularities of the invention will emerge from the drawings appended to this specification and which illustrate, without limitation, the above process and represent particular embodiments of the valve according to the invention.

La figure 1 est une vue en plan schématique illustrant le procédé susdit et montrant les quatres positions extrêmes et quelques positions intermédiaires que peut occuper l'ouverture de la plaque mobile quand celle-ci est mue suivant deux directions rectiligne sécantes, qui sont perpendiculaires et qui coupent l'axe de l'ouverture de la plaque fixe, cette dernière ouverture étant représentée en trait plein, tandis que l'ouverture de la plaque mobile est montrée en traits interrompus.Figure 1 is a schematic plan view illustrating the above process and showing the four extreme positions and some intermediate positions that can occupy the opening of the movable plate when the latter is moved in two secant rectilinear directions, which are perpendicular and which intersect the axis of the opening of the fixed plate, the latter opening being shown in solid lines, while the opening of the movable plate is shown in broken lines.

La figure 2 est une vue en plan schématique montrant quelques unes des positions extrêmes et intermédiaires que peut occuper l'ouverture de la plaque mobile quand cette dernière est mue suivant des directions circulaires concentriques dont le centre est situé en dehors de la projection de l'ouverture de la plaque fixe sur la plaque mobile et suivant des directions rectilignes passant par le centre susdit, une de ces directions circulaires et une de ces directions rectilignes coupant l'axe de l'ouverture de la plaque fixe, cette dernière étant représentée en trait plein, tandis que l'ouverture de la plaque mobile est montrée en traits interrompus.Figure 2 is a schematic plan view showing some of the extreme and intermediate positions that can occupy the opening of the movable plate when the latter is moved in concentric circular directions whose center is located outside the projection of the opening of the fixed plate on the movable plate and in rectilinear directions passing through the aforementioned center, one of these circular directions and one of these rectilinear directions intersecting the axis of the opening of the fixed plate, the latter being shown in line full, while the opening of the movable plate is shown in broken lines.

La figure 3 est une vue analogue aux figures 1 et 2 montrant diverses positions que peut occuper l'ouverture de la plaque mobile quand cette dernière est déplacée suivant des directions circulaires concentriques dont le centre est situé sur l'axe de l'ouverture de la plaque fixe et suivant des directions rectilignes passant par ce centre.Figure 3 is a view similar to Figures 1 and 2 showing various positions that can occupy the opening of the movable plate when the latter is moved in concentric circular directions whose center is located on the axis of the opening of the fixed plate and following rectilinear directions passing through this center.

La figure 4 est une vue analogue aux figures précédentes et montre diverses positions que peut occuper l'ouverture de la plaque mobile lorsque celle-ci est déplacée suivant une direction rectiligne coupant l'axe de l'ouverture de la plaque fixe et une direction circulaire dont le centre est situé sur l'axe de l'ouverture de la plaque mobile.Figure 4 is a view similar to the previous figures and shows various positions that can occupy the opening of the movable plate when the latter is moved in a rectilinear direction intersecting the axis of the opening of the fixed plate and a circular direction whose center is located on the axis of the opening of the movable plate.

La figure 5 est une vue schématique de la plaque mobile d'une vanne suivant l'invention et des moyens assurant les déplacements de cette plaque suivant les directions définies à la figure 2, l'ouverture de la plaque fixe étant représentée en traits interrompus.Figure 5 is a schematic view of the movable plate of a valve according to the invention and means ensuring the movement of this plate in the directions defined in Figure 2, the opening of the fixed plate being shown in broken lines.

La figure 6 est une vue analogue à la figure 5 et représente la plaque mobile d'une vanne ainsi que les moyens d'entraînement de cette dernière que sont agencés pour déplacer ladite plaque suivant les directions définies à la figure 3.FIG. 6 is a view similar to FIG. 5 and represents the movable plate of a valve as well as the drive means of the latter that are arranged to move said plate in the directions defined in FIG. 3.

La figure 7 est également une vue analogue aux figures 5 et 6 d'une vanne dont la plaque mobile est déplacée suivant les directions définies à la figure 4.FIG. 7 is also a view similar to FIGS. 5 and 6 of a valve whose movable plate is moved in the directions defined in FIG. 4.

Les figures 8 et 9 illustrent deux variantes des vannes représentées aux figures 5 à 7.Figures 8 and 9 illustrate two variants of the valves shown in Figures 5 to 7.

Les figures 10 et 11 montrent des détails de plaques équipant des vannes suivant l'invention.Figures 10 and 11 show details of plates fitted to valves according to the invention.

Dans les différentes figures, les mêmes notations de référence désignent des éléments identiques ou analogues.In the different figures, the same reference notations designate identical or analogous elements.

Le procédé suivant l'invention et illustré aux dessins est destiné au réglage du débit d'un liquide, plus particulièrement d'une matière en fusion notamment dans une installation de coulée continue, entre un débit maximum et un débit nul en utilisant une vanne 1 qui comprend au moins une plaque fixe 2 et une plaque mobile 3, ces plaques 2 et 3, qui sont superposées, étant maintenues constamment en contact et présentant chacune une ouverture 4 (pour la plaque fixe) et 5 (pour la plaque mobile). On pourrait également prévoir, suivant l'invention, que la plaque mobile 3 soit disposée entre deux plaques fixes supérieure 2 et inférieure 2′ afin d'être en contact avec chacune de ces dernières, les ouvertures 4 et 4′ des plaques fixes étant coaxiales et soit de sections identiques (voir figure 10), soit de sections différentes (voir figure 11). Dans ce dernier cas, l'ouverture 4′ de la plaque fixe 2′ a une section supérieure à celle de l'ouverture 4 de la plaque fixe 2 afin que le liquide contenu dans l'ouverture 5 de la plaque mobile 3, dont la section est identique à celle de l'ouverture 4 de la plaque fixe 2, puisse s'échapper à travers l'ouverture 4′ après la fermeture de la vanne. Cette particularité est importante lorsque la vanne est utilisée pour la coulée d'un métal fondu, car elle évite que du métal se solidifie dans l'ouverture 5 de la plaque mobile 3 après fermeture de la vanne et rende cette dernière inutilisable, lors d'une prochaine ouverture de la vanne, à cause du bouchon créé dans l'ouverture 5 précitée. Le même résultat pourrait être obtenu, comme montré à la figure 10, en utilisant deux plaques fixes 2 et 2′ dont les ouvertures 4 et 4′ ont la même section. Pour permettre au liquide contenu dans l'ouverture 5 de la plaque mobile 3 de s'écouler de cette dernière après fermeture de la vanne, on prévoit alors une ouverture 5 ayant son orifice tourné vers la plaque 2 qui a une superficie égale à celle de l'ouverture 4 de la plaque 2 tandis que son orifice tourné vers la plaque 2′ a une superficie supérieure à celle de l'ouverture 4′ de la plaque fixe 2′. Suivant l'invention, on pourrait prévoir plusieurs ouvertures par plaque, par exemple deux ouvertures par plaque, ces plaques fixe et mobile étant par exemple identiques pour être interchangeables et réduire le coût de fabrication. Dans ce cas, on utilisera, pour chaque ouverture de la plaque fixe mise en service, soit les deux ouvertures de la plaque mobile alternativement, soit l'une de ces deux ouvertures tant qu'elle est utilisable, puis l'autre. Pour la mise en oeuvre du procédé suivant l'invention, on utilisera de préférence des plaques, 2, 2′ et 3 qui sont symétriques par rapport à au moins un plan passant par l'axe 8, 11 de leur ouverture 4,4′ et 5. Dans les exemples décrits ci-après et illustrés aux dessins, on a montré uniquement des plaques fixe et mobile qui sont identiques et qui sont en forme de cylindre de révolution avec chacune une ouverture, également en forme de cylindre de révolution, qui est coaxiale à la plaque. Ces plaques offrent l'avantage que les tensions internes dues à l'échauffement sont homogènes et que les déperditions calorifiques au sein des plaques sont équilibrées. Toutefois, on obtiendrait également de bons résultats avec des plaques carrées ou en forme de polygones réguliers, à condition que leur ouverture soit centrée par rapport à la plaque.The process according to the invention and illustrated in the drawings is intended for adjusting the flow rate of a liquid, more particularly of a molten material, in particular in a continuous casting installation, between a maximum flow rate and a zero flow rate using a valve 1 which comprises at least one fixed plate 2 and a mobile plate 3, these plates 2 and 3, which are superimposed, being kept constantly in contact and each having an opening 4 (for the fixed plate) and 5 (for the mobile plate). One could also provide, according to the invention, that the movable plate 3 is disposed between two fixed upper 2 and lower 2 ′ plates in order to be in contact with each of the latter, the openings 4 and 4 ′ of the fixed plates being coaxial and either of identical sections (see figure 10), or of different sections (see figure 11). In this last case, the opening 4 ′ of the fixed plate 2 ′ has a cross section greater than that of the opening 4 of the fixed plate 2 so that the liquid contained in the opening 5 of the movable plate 3, the cross section of which is identical to that from the opening 4 of the fixed plate 2, can escape through the opening 4 ′ after the valve has closed. This feature is important when the valve is used for pouring molten metal, because it prevents metal from solidifying in the opening 5 of the movable plate 3 after closing the valve and rendering the latter unusable during a next opening of the valve, because of the plug created in the aforementioned opening 5. The same result could be obtained, as shown in Figure 10, by using two fixed plates 2 and 2 ′ whose openings 4 and 4 ′ have the same section. To allow the liquid contained in the opening 5 of the movable plate 3 to flow from the latter after closing the valve, an opening 5 is then provided having its orifice facing the plate 2 which has an area equal to that of the opening 4 of the plate 2 while its orifice facing the plate 2 ′ has an area greater than that of the opening 4 ′ of the fixed plate 2 ′. According to the invention, one could provide several openings per plate, for example two openings per plate, these fixed and movable plates being for example identical to be interchangeable and reduce the manufacturing cost. In this case, for each opening of the fixed plate put into service, either the two openings of the movable plate will be used alternately, or one of these two openings as long as it is usable, then the other. For the implementation of the method according to the invention, use will preferably be made of plates 2, 2 ′ and 3 which are symmetrical with respect to at least one plane passing through the axis 8, 11 of their opening 4.4 ′ and 5. In the examples described below and illustrated in the drawings, only fixed and mobile plates have been shown which are identical and which are in the form of a cylinder of revolution with each an opening, also in the form of a cylinder of revolution, which is coaxial with the plate. These plates have the advantage that the internal tensions due to heating are homogeneous and that the heat losses within the plates are balanced. However, one would also get good results with plates square or in the shape of regular polygons, provided that their opening is centered relative to the plate.

Pour répartir l'usure de la plaque mobile 3 sur une partie plus importante de la périphérie de l'ouverture 5 de cette plaque en la doublant par rapport à la partie utilisée dans les obturateurs connus, le procédé suivant l'invention consiste à déplacer, comme montré à la figure 1, cette plaque mobile 3 suivant deux directions rectilignes sécantes schématisées par les traits d'axe 6 et 7 et qui sont déterminées pour mettre, lors de l'ouverture de la vanne 1, partiellement et totalement en regard, les ouvertures 4 et 5 des plaques fixe 2 et mobile 3. Lorsqu'on souhaite mettre totalement en regard les ouvertures 4 et 5 comme cela est prévu dans l'exemple illustré à la figure 1, il faut qu'au moins une des deux directions 6 et 7 coupe l'axe 8 de l'ouverture fixe 4. A la figure 1, les deux directions sécantes 6 et 7 sont perpendiculaires, mais on obtiendrait des résultats équivalents avec des directions rectilignes sécantes non perpendiculaires. On peut obtenir un résultat pratiquement équivalent en déplaçant la plaque mobile 3 suivant deux directions sécantes dont l'une est rectiligne, l'autre étant circulaire. Dans ce cas, on peut envisager les diverses possibilités suivantes : la direction rectiligne 6 coupe l'axe 8 de l'ouverture 4 de la plaque fixe et la direction circulaire 7 a son centre 9 situé sur l'axe 8 susdit ; la direction rectiligne 6 coupe l'axe 8 de l'ouverture 4 de la plaque fixe 2 tandis que la direction circulaire 7 coupe ou non cet axe 8 et a son centre 9 qui est situé à l'intérieur de la projection de l'ouverture 4 de la plaque fixe 2 sur la plaque mobile 3 ; la direction rectiligne 6 coupe l'axe 8 de l'ouverture 4 de la plaque fixe tandis que la direction circulaire 7, qui coupe ou non cet axe 8, a son centre 9 qui est situé à l'extérieur de la projection de l'ouverture 4 de la plaque fixe sur la plaque mobile 3 ; la direction circulaire 7 coupe l'axe 8 de l'ouverture 4 de la plaque fixe et a son centre 9 qui est situé à l'extérieur de la projection de l'ouverture 4 sur la plaque mobile 3, tandis que la direction rectiligne coupe ou non cet axe 8.To distribute the wear of the movable plate 3 over a larger part of the periphery of the opening 5 of this plate by doubling it with respect to the part used in known shutters, the method according to the invention consists in moving, as shown in FIG. 1, this movable plate 3 following two intersecting rectilinear directions shown diagrammatically by the axis lines 6 and 7 and which are determined to bring, when the valve 1 opens, partially and completely opposite, the openings 4 and 5 of the fixed plates 2 and movable 3. When it is desired to place the openings 4 and 5 completely opposite as provided in the example illustrated in FIG. 1, it is necessary that at least one of the two directions 6 and 7 intersects the axis 8 of the fixed opening 4. In FIG. 1, the two secant directions 6 and 7 are perpendicular, but equivalent results would be obtained with rectilinear secant directions which are not perpendicular. A practically equivalent result can be obtained by moving the movable plate 3 in two intersecting directions, one of which is straight, the other being circular. In this case, the following various possibilities can be envisaged: the rectilinear direction 6 intersects the axis 8 of the opening 4 of the fixed plate and the circular direction 7 has its center 9 located on the aforementioned axis 8; the rectilinear direction 6 cuts the axis 8 of the opening 4 of the fixed plate 2 while the circular direction 7 cuts or not this axis 8 and has its center 9 which is located inside the projection of the opening 4 of the fixed plate 2 on the movable plate 3; the straight direction 6 cuts the axis 8 of the opening 4 of the fixed plate while the circular direction 7, which cuts or not this axis 8, has its center 9 which is located outside of the projection of the opening 4 of the fixed plate on the movable plate 3; the circular direction 7 cuts the axis 8 of the opening 4 of the fixed plate and has its center 9 which is located outside the projection of the opening 4 on the movable plate 3, while the rectilinear direction cuts or not this axis 8.

On peut également, suivant l'invention, déplacer la plaque mobile 3 suivant deux directions circulaires sécantes. C'est ainsi que l'on pourra répartir l'usure de la plaque mobile 3 sur la totalité de la périphérie de son ouverture 5 en déplaçant notamment ladite plaque 3 suivant une première direction circulaire dont le centre est situé sur l'axe 8 de l'ouverture 4 de la plaque fixe 2 et suivant une seconde direction circulaire qui coupe cet axe 8.It is also possible, according to the invention, to move the movable plate 3 in two intersecting circular directions. This is so that the wear of the movable plate 3 can be distributed over the entire periphery of its opening 5, in particular by moving said plate 3 in a first circular direction, the center of which is located on the axis 8 of the opening 4 of the fixed plate 2 and in a second circular direction which intersects this axis 8.

On pourra également répartir l'usure de la plaque mobile 3 sur la totalité de la périphérie de son ouverture 5, et ce jusqu'au moment où cette plaque 3 conservera une résistance suffisante, en la déplaçant, comme montré à la figure 2, suivant des directions circulaires concentriques 7, 7′, 7˝...7n dont le centre 9 est situé en dehors de la projection de l'ouverture 4 de la plaque fixe 2 sur la plaque mobile 3 et suivant des directions rectilignes 6, 6′, 6˝...6n qui passent par le centre 9 précité, une de ces directions circulaires et une de ces directions rectilignes coupant l'axe 8 de l'ouverture 4 de la plaque fixe 2 afin que l'ouverture 5 de la plaque mobile puisse être mise totalement en regard de cette ouverture 4.We can also distribute the wear of the movable plate 3 over the entire periphery of its opening 5, and until this plate 3 retains sufficient resistance, by moving it, as shown in Figure 2, according concentric circular directions 7, 7 ′, 7˝ ... 7 n whose center 9 is located outside the projection of the opening 4 of the fixed plate 2 on the movable plate 3 and in rectilinear directions 6, 6 ′, 6˝ ... 6 n which pass through the aforementioned center 9, one of these circular directions and one of these rectilinear directions intersecting the axis 8 of the opening 4 of the fixed plate 2 so that the opening 5 of the movable plate can be placed completely opposite this opening 4.

Une même possibilité d'usure maximale de la plaque mobile 3 peut être réalisée, comme montré à la figure 3, en déplaçant cette plaque mobile 3 suivant, d'une part, des directions circulaires 7, 7′... qui sont concentriques et dont le centre 9 est situé sur l'axe 8 de l'ouverture 4 de la plaque fixe 2 et, d'autre part, des directions rectilignes 6, 6′....6n qui passent par ce centre 9 des directions circulaires.The same possibility of maximum wear of the movable plate 3 can be achieved, as shown in FIG. 3, by moving this movable plate 3 along, on the one hand, circular directions 7, 7 ′ ... which are concentric and whose center 9 is located on the axis 8 of the opening 4 of the fixed plate 2 and, on the other hand, rectilinear directions 6, 6 ′ .... 6 n which pass through this center 9 of the circular directions .

Le procédé suivant l'invention permet, lorsque les ouvertures 4 et 5 des plaques fixe et mobile ne sont pas totalement en regard afin d'étrangler le jet, dans un système à tiroir, comme montré aux figures 4 et 7, tout comme dans le système tel qu'illustré à la figure 9 et qui sera décrit ci-après, de faire varier, pas à pas ou en continu, la zone 10 de la plaque mobile en contact avec le métal en fusion et ce, de manière à obtenir un meilleur équilibrage des tensions dans la plaque mobile.The method according to the invention allows, when the openings 4 and 5 of the fixed and movable plates are not completely facing each other in order to throttle the jet, in a drawer system, as shown in FIGS. 4 and 7, just as in the system as illustrated in FIG. 9 and which will be described below, of varying, step by step or continuously, the zone 10 of the movable plate in contact with the molten metal, so as to obtain a better balancing of tensions in the moving plate.

Dans l'exemple de mise en oeuvre du procédé repris à la figure 4, la plaque mobile 3 est déplacée suivant une direction rectiligne 6 qui coupe l'axe 8 de l'ouverture 4 de la plaque fixe 2 et suivant une direction circulaire 7 sécante à la direction 6 et qui a son centre 9 qui est situé sur l'axe 11 de la plaque mobile 3.In the example of implementation of the method shown in Figure 4, the movable plate 3 is moved in a rectilinear direction 6 which intersects the axis 8 of the opening 4 of the fixed plate 2 and in a secant circular direction 7 to direction 6 and who has its center 9 which is located on the axis 11 of the movable plate 3.

Il est évident que cette rotation de la plaque mobile 3 autour de l'axe 11 de son ouverture 5 peut être combinée avec tous les mouvements suivant les directions décrites ci-avant, et plus particulièrement avec les mouvements suivant les directions rectilignes 6 et 7 illustrées à la figure 1.It is obvious that this rotation of the movable plate 3 around the axis 11 of its opening 5 can be combined with all the movements in the directions described above, and more particularly with the movements in the rectilinear directions 6 and 7 illustrated. in Figure 1.

Les déplacements de la plaque mobile 3 suivant les directions susdites peuvent être progammés pour soit être effectués simultanément, soit être effectués successivement dans un ordre déterminé ou non, ces mouvements pouvant en outre s'effectuer, pour certaines ou toutes les directions précitées, dans les deux sens.The movements of the movable plate 3 in the above directions can be programmed to either be carried out simultaneously, or be carried out successively in a determined order or not, these movements can also be carried out, for some or all of the above directions, in the both directions.

La vanne 1 suivant l'invention est schématisée, aux figures 5 à 9, soit par ses deux plaques fixe 2 et mobile 3 et par ses moyens 12 permettant de déplacer la plaque mobile 3 suivant au moins deux directions sécantes 6 et 7 susdites, soit par l'axe 8 de l'ouverture 4 de la plaque fixe 2, par la plaque mobile 3 et par lesdits moyens 12.The valve 1 according to the invention is shown diagrammatically in FIGS. 5 to 9, either by its two fixed 2 and mobile 3 plates and by its means 12 making it possible to move the mobile plate 3 in at least two secant directions 6 and 7 above, or by the axis 8 of the opening 4 of the fixed plate 2, by the movable plate 3 and by said means 12.

La vanne 1 représentée à la figure 5 est munie de moyens 12 qui permettent de déplacer la plaque mobile 3 suivant des directions rectilignes 6, 6′...-n et des directions circulaires concentriques 7,7′....7n telles que décrites ci-dessus et illustrées à la figure 2. Ces moyens 12 sont constitués, d'une part, par un premier vérin 13, monté à rotation autour d'un axe fixe 14 qui est parallèle à l'axe 11 de l'ouverture 5 de la plaque mobile 3, dont l'extrémité libre de la tige de piston 15 porte la plaque mobile 3 de manière à ce que l'axe 16 du vérin 13 coupe l'axe de l'ouverture 5 de la plaque mobile 3 et, d'autre part, par un second vérin 17, dont l'axe 18 est parallèle à l'axe 16 du vérin 13 et dont le cylindre 19 est fixé au cylindre 20 dudit vérin 13, qui a l'extrémité libre de sa tige de piston 21 qui se déplace dans une boutonnière horizontale 22 réalisée dans une pièce fixe 23.The valve 1 shown in FIG. 5 is provided with means 12 which make it possible to move the movable plate 3 in rectilinear directions 6, 6 ′ ...- n and concentric circular directions 7,7 ′ .... 7 n such as described above and illustrated in FIG. 2. These means 12 consist, on the one hand, of a first jack 13, mounted for rotation about a fixed axis 14 which is parallel to the axis 11 of the opening 5 of the movable plate 3, the free end of the piston rod 15 of which carries the movable plate 3 so that the axis 16 of the jack 13 intersects the axis of the opening 5 of the movable plate 3 and, on the other hand, by a second cylinder 17, whose axis 18 is parallel to the axis 16 of the cylinder 13 and whose cylinder 19 is fixed to the cylinder 20 of said cylinder 13, which has the free end of its piston rod 21 which moves in a horizontal buttonhole 22 produced in a fixed part 23.

La vanne 1 représentée à la figure 6 est pourvue de moyens 12 permettant de déplacer la plaque mobile 3 suivant des directions rectilignes 6, 6′...6n et des directions circulaires concentriques 7,7′...7n telles que décrites ci-avant et montrées à la figure 3. Ces moyens 12 comprennent un coulisseau 24 dans lequel est fixé la plaque mobile 3 et qui est monté, de manière à pouvoir se déplacer parallèlement à lui-même, dans un cadre 25 en forme de quadrilatère à angle droit. Ce coulisseau 24 est fixé à l'extrémité de la tige de piston 26 d'un vérin 27 dont l'axe coupe l'axe de l'ouverture 5 de la plaque mobile 3 et qui est parallèle à un des côté du cadre 25. Ce cadre 25 et le cylindre 28 du vérin 27 sont fixés à une couronne circulaire 29 dont l'axe est parallèle à l'axe de l'ouverture 5 de la plaque mobile 3 ou confondu avec ce dernier axe et ce, suivant la position occupée par le coulisseau 24 par rapport au cadre 25 avec lequel il coopère, un moteur-réducteur 30, qui est fixe, étant prévu pour entraîner la couronne 29, ainsi que le cadre 25 et le vérin 27 qui y sont fixés, autour de son axe.The valve 1 shown in Figure 6 is provided with means 12 for moving the movable plate 3 in rectilinear directions 6, 6 ′ ... 6 n and concentric circular directions 7,7 ′ ... 7 n as described above and shown in figure 3. These means 12 comprise a slide 24 in which the movable plate 3 is fixed and which is mounted, so as to be able to move parallel to itself, in a frame 25 in the form of a quadrilateral at right angles. This slide 24 is fixed to the end of the piston rod 26 of a jack 27 whose axis intersects the axis of the opening 5 of the movable plate 3 and which is parallel to one of the sides of the frame 25. This frame 25 and the cylinder 28 of the jack 27 are fixed to a circular ring 29 whose axis is parallel to the axis of the opening 5 of the movable plate 3 or coincides with this latter axis and this, depending on the position occupied by the slide 24 relative to the frame 25 with which it cooperates, a gear motor 30, which is fixed, being provided to drive the crown 29, as well as the frame 25 and the jack 27 which are fixed there, around its axis .

La figure 7 montre une vanne 1 suivant l'invention dont les moyens 12 précités permettent de déplacer la plaque mobile 3 suivant la direction rectiligne 6 coupant l'axe 11 de l'ouverture 5 de la plaque mobile 3 et suivant une direction circulaire 7 dont le centre 9 est situé sur cet axe 11 (voir figure 4). Cette plaque mobile 3 est montée sur un support 31 agencé pour qu'elle puisse tourner librement autour de l'axe 11 susdit. Le support 31 est monté à coulissement sur un support 32, sur lequel il peut se déplacer librement et parallèlement à lui-même suivant la direction rectiligne 6 susdite et est commandé par la tige de piston 33 d'un vérin 34, qui est fixe et dont l'axe est perpendiculaire à l'axe 11 de l'ouverture 5. Une couronne dentée 35 est associée à la périphérie de la plaque mobile 3 et est coaxiale à l'ouverture 5, une vis sans fin 36 parallèle à la direction 6 étant prévue pour entraîner en rotation, sous la commande d'un moteur-réducteur 37, la couronne et la plaque mobile 3 qui y est fixée autour de l'axe 11.FIG. 7 shows a valve 1 according to the invention, the above-mentioned means 12 making it possible to move the movable plate 3 in the rectilinear direction 6 intersecting the axis 11 of the opening 5 of the movable plate 3 and in a circular direction 7 whose the center 9 is located on this axis 11 (see Figure 4). This movable plate 3 is mounted on a support 31 arranged so that it can rotate freely around the aforementioned axis 11. The support 31 is slidably mounted on a support 32, on which it can move freely and parallel to itself in the above-mentioned rectilinear direction 6 and is controlled by the piston rod 33 of a jack 34, which is fixed and whose axis is perpendicular to the axis 11 of the opening 5. A ring gear 35 is associated with the periphery of the movable plate 3 and is coaxial with the opening 5, an endless screw 36 parallel to the direction 6 being provided to drive in rotation, under the control of a gear motor 37, the crown and the movable plate 3 which is fixed there around the axis 11.

La vanne 1 représentée à la figure 8 est une variante de la vanne illustrée à la figure 5. La plaque mobile 3 est fixée, en 38 et 39, à la tige de piston 40 d'un vérin 41 dont le cylindre est monté à pivotement autour d'un axe fixe 42 parallèle à l'axe 11 de l'ouverture 5 de la plaque mobile 3, l'axe du vérin 41 étant perpendiculaire audit axe 11. L'extrémité 43 de la tige de piston 40 est articulée, en 44 et autour d'un axe parallèle à l'axe 11, à l'extrémité libre de la tige de piston d'un vérin 46 dont le cylindre est monté à pivotement autour d'un axe fixe 47, parallèle à l'axe 11.The valve 1 shown in FIG. 8 is a variant of the valve illustrated in FIG. 5. The movable plate 3 is fixed, at 38 and 39, to the piston rod 40 of a jack 41 whose cylinder is pivotally mounted around a fixed axis 42 parallel to the axis 11 of the opening 5 of the movable plate 3, the axis of the jack 41 being perpendicular to said axis 11. The end 43 of the piston rod 40 is articulated, at 44 and around an axis parallel to the axis 11, at the free end of the piston rod of a jack 46 whose cylinder is pivotally mounted around a fixed axis 47, parallel to axis 11.

La vanne 1 illustrée à la figure 9 a une plaque mobile 3 dont les déplacements sont provoqués par des moyens 12 qui comprennent un premier cadre 48, en forme de quadrilatère dont les angles sont droits, sur un des côtés duquel est montée une vis sans fin 49 agencée de manière à déplacer la plaque mobile 3 dans le premier cadre 48, grâce à un écrou 53 fixé au support 54 de la plaque 3 suivant une direction parallèle à ce côté 50. Ce cadre 48 est monté dans un second cadre fixe 51, en forme de quadrilatère dont les angles sont droits, sur un des côtés duquel est montée une vis sans fin 52 agencée pour déplacer le cadre 48 dans le cadre 51, grâce à un écrou 55 fixé au cadre 48, suivant une direction perpendiculaire au côté 50 précité dudit cadre 48, l'axe des vis sans fin 49 et 52 étant perpendiculaire. Pour faire varier soit pas à pas, soit en continu, la zone 10 susdite de la plaque mobile 3 en contact avec le métal en fusion, d'une manière analogue à celle montrée aux figures 4 et 7, on peut faire tourner la plaque mobile 3, autour de l'axe 11 de son ouverture 5, dans son support 54.The valve 1 illustrated in Figure 9 has a movable plate 3 whose movements are caused by means 12 which include a first frame 48, in the form of a quadrilateral whose angles are straight, on one side of which is mounted a worm 49 arranged to move the movable plate 3 in the first frame 48, by means of a nut 53 fixed to the support 54 of the plate 3 in a direction parallel to this side 50. This frame 48 is mounted in a second fixed frame 51, in the form of a quadrilateral whose angles are straight, on one side of which is mounted an endless screw 52 arranged to move the frame 48 in the frame 51, by means of a nut 55 fixed to the frame 48, in a direction perpendicular to the side 50 said frame 48 above, the axis of the worms 49 and 52 being perpendicular. To vary either step by step or continuously, the aforementioned zone 10 of the movable plate 3 in contact with the molten metal, in a manner analogous to that shown in FIGS. 4 and 7, the movable plate can be rotated 3, around the axis 11 of its opening 5, in its support 54.

Lorsque la vanne est utilisée pour du métal en fusion, on prévoit avantageusement, comme montré à la figure 10, dans au moins une des plaques 2, 2′ et 3 un insert poreux 56 à travers lequel peut circuler un gaz, tel que de l'argon, sous pression. Cet insert auquel aboutit un conduit d'amenée de gaz non représenté, entoure l'ouverture de la plaque, sur au moins une partie importante de son épaisseur. La plaque mobile 3 utilisée dans les vannes susdites sera avantageusement cerclée d'une chemise métallique qui sera pourvue d'organes de liaison aux moyens 12 précités assurant les déplacements de ladite plaque mobile 3.When the valve is used for molten metal, provision is advantageously made, as shown in FIG. 10, in at least one of the plates 2, 2 ′ and 3, a porous insert 56 through which a gas, such as l 'argon, under pressure. This insert, which leads to a gas supply duct, not shown, surrounds the opening of the plate, over at least a significant part of its thickness. The movable plate 3 used in the aforementioned valves will advantageously be encircled by a metal jacket which will be provided with connecting members to the aforementioned means 12 ensuring the movements of said movable plate 3.

Il doit être entendu que l'invention n'est nullement limitée aux formes de réalisation décrites et que bien des modifications peuvent être apportées à ces dernières sans sortir du cadre du présent brevet.It should be understood that the invention is in no way limited to the embodiments described and that many modifications can be made to these without departing from the scope of this patent.

Claims (27)

1. A method for controlling a flow rate of a liquid, in particular of a molten material, between a maximum flow and a zero flow, in a valve (1) comprising at least a fixed plate (2) and a mobile plate (3) which are superposed and maintained constantly in contact, each one having at least an opening (4, 5), this method, consisting of placing said openings (4, 5) more or less opposite each other by displacing said mobile plate (3), characterized in that this mobile plate (3) is displaced according to at least two secant directions (6) and (7) which are determined for placing said openings of the fixed (2) and mobile (3) plates at least partly opposite each other when said valve is opened.
2. A method as claimed in claim 1, characterized in that these two directions (6) and (7) are determined in such a manner that at least one of those crosses an axis (8) of said opening (4) of the fixed plate.
3. A method as claimed in anyone of the claims 1 and 2, characterized in that the two directions (6) and (7) according to which the mobile plate (3) is displaced, are rectilinear.
4. A method as claimed in claim 3, characterized in that these two rectilinear directions (6) and (7) are perpendicular.
5. A method as claimed in anyone of the claims 1 and 2, characterized in that one of the two directions (6) and (7) is rectilinear (6) whereas the other (7) is circular.
6. A method as claimed in claim 5, characterized in that the centre (9) of the circular direction (7) is situated on the axis (8) of the opening (11) of the fixed plate (2), the rectilinear direction (6) crosses the axis (8).
7. A method as claimed in claim 5, characterized in that the centre (9) of the circular direction (7) is situated within the projection of the opening (4) of the fixed plate (2) on the mobile plate (3), the rectilinear direction (6) crosses the axis (8) of the opening (4) of the fixed plate (2) and the circular direction crosses or not said axis (8).
8. A method as claimed in claim 5, characterized in that the centre (9) of the circular direction (7) is situated outside the projection of the opening (4) of the fixed plate on the mobile plate, the rectilinear direction (6) crosses the axis (8) of the opening of the fixed plate and the circular direction crosses or not this axis.
9. A method as claimed in claim 5, characterized in that the centre (9) of the circular direction (7) is situated outside the projection on the mobile plate (3) of the opening (4) of the fixed plate (2), the circular direction crosses the axis (8) of the opening of the fixed plate, the rectilinear direction (6) crosses or not this ax is.
10. A method as claimed in anyone of the claims 1 and 2, characterized in that the two directions according to which the mobile plate (3) is displaced, are circular.
11. A method as claimed in claim 10, characterized in that the centre of one of the circular directions is situated on the axis (8) of the opening (4) of the fixed plate (2), the other circular direction crosses the axis (8).
12. A method as claimed in anyone of the claims 1 and 2, characterized in that the mobile plate (3) is displaced, on the one hand according to two rectilinear directions (6) and (7), at least one of which crosses the axis (8) of the opening (4) of the fixed plate (2) and, on the other hand, according to a circular direction the centre (9) of which is situated on the axis (11) of the opening (5) of the mobile plate (3).
13. A method as claimed in claim 5, characterized in that the mobile plate (3) is displaced according to a rectilinear direction (6) crossing the axis (8) of the opening (4) of the fixed plate (2) and according to a circular direction (7), the centre of which being situated on the axis (11) of the opening (5) of the mobile plate.
14. A method as claimed in anyone of the claims 1 to 13, characterized in that the mobile plate (3) is simultaneously displaced according to said directions.
15. A method as claimed in anyone of the claims 1 to 13, characterized in that the displacements of the mobile plate (3) according to said directions are made successively in a determined order or not.
16. A method as claimed in anyone of the claims 1 to 15, characterized in that the displacements of the mobile plate (3) according to said directions are made in both senses.
17. A valve for executing a method as claimed in anyone of the claims 1 to 16, comprising at least a fixed plate (2) and a mobile plate (3) which are superposed and maintained constantly in contact, each one having at least an opening (4,5), characterized in that it comprises means (12) provided for displacing said mobile plate according to at least two secant directions (6, 7).
18. A valve as claimed in claim 17, characterized in that the mobile plate is mounted in a first frame (48) having a rectangular shape the angle of which being right, comprising means, such as an endless screw worm (49) provided for displacing said mobile plate within this first frame in a direction parallel to one side of the frame, the latter being mounted in a second fixed frame (51), having a rectangular shape the angle of which being right and comprising means, such as an endless screw worm (52), provided for displacing the first frame (48) within the second frame (51) according to a direction parallel to one of its sides, the axis of the latter endless screw worm (52) being substantially perpendicular to the axis of the endless screw worm (49) provided on the first frame (48).
19. A valve as claimed in claim 17, characterized in that the mobile plate (3) is fixed on the piston rod (15) of a first jack (13), the cylinder (20) of which being rotatably mounted on a fixed axis (14) parallel to the axis (11) of the opening (5) of the mobile plate (3), a second jack (17) being coupled to the first jack (13) for enabling an oscillation of the cylinder (20) of the latter around the fixed axis (14) on which it is rotatably mounted.
20. A valve as claimed in claim 17, characterized in that said mobile plate (3) is fixed on a slide (24) mounted in a frame (25) having a rectangular shape with right angles, this slide (24) being fixed to the piston rod of a jack, the axis of which crosses the axis of the opening (5) of the mobile plate (3) and which is parallel to one of the sides of the frame (25), the latter and the jack being fixed to a circular crown-wheel (29) the axis of which being parallel to the axis of the opening of the mobile plate or coincide with the latter depending on the position of the slide with respect to said frame, the circular crown-wheel (29) being supported in such a manner to be able to rotate around its axis and a fixed engine with a reducer being provided for enabling a rotation of said crown-wheel around said axis.
21. A valve as claimed in claim 17, characterized in that the mobile plate (3) is mounted on a support (31) which is provided for enabling a free rotation of said plate around the axis (11) of its opening (5), this support (31) being mobile and mounted on means, such as a piston rod of a jack, a cylinder of which being fixed and which jack is provided for displacing the plate according to a rectilinear direction (6) going through the axis (11) of the opening (5) of the mobile plate (3), said valve comprising a toothed crown-wheel (35) so coupled to the mobile plate (3) that it is coaxial to the opening (5) of the latter and means (36, 37) provided for engaging with this crown-wheel (35) for enabling a rotation around its axis.
22. A valve as claimed in anyone of the claims 17 to 21, characterized in that the mobile plate (3) and the fixed plate (2) are symmetrical with respect to at least one plane going through the axis of their opening (5, 4).
23. A valve as claimed in claim 22, characterized in that the mobile plate (3) has the shape of a rotational cylinder, the opening presented by this plate being coaxial to the cylinder and preferably the opening (5) has on the one hand the shape of a rotational cylinder and has, on the other hand, a comparable shape and a comparable section as the one of the opening (4) of the fixed plate (2).
24. A valve as claimed in claim 23, characterized in that the fixed (2) and mobile (3) plates are identical.
25. A valve as claimed in anyone of the claims 17 to 22, characterized in that the mobile plate (3) is slidable between two fixed plates (2, 2′), an upper and a lower, the openings (4, 4′) of which having the same section, an opening (5) of the mobile plate (3) having an aperture oriented towards said upper fixed plate (8) having an area substantially equal to the one of the sections of said opening (4) of said upper fixed plate and smaller than the are of its aperture directed towards the lower fixed plate (2′).
26. A valve as claimed in anyone of the claims 17 to 22, characterized in that the mobile plate (3) slides between two fixed plates (2, 2′), an upper and a lower, the opening (4) of the upper fixed plate (2) and an opening (5) of the mobile plate having the same section, whereas the opening (4′) of the lower fixed plate (2′) has a section superior to the sections of the openings (4) and (5) of the upper fixed plate and the mobile plate (3).
27. A valve as claimed in anyone of the claims 22 to 26, characterized in that at least one of said plates comprises a porous insert (56) provided for enabling the circulation of a gas there through, and which insert is sunk in the plate over at least an important part of its thickness, around the opening of said plate, a supply pipe for gas, such as pressurzed argon, being provided to supply the gas to said insert (56).
EP88870106A 1988-06-09 1988-06-09 Method for regulating the flow in a sliding gate and sliding gate for carrying ou this method Expired - Lifetime EP0345407B1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
ES198888870106T ES2030535T3 (en) 1988-06-09 1988-06-09 FLOW REGULATION PROCEDURE IN A GATE VALVE AND GATE VALVE FOR THE IMPLEMENTATION OF THIS PROCEDURE.
EP88870106A EP0345407B1 (en) 1988-06-09 1988-06-09 Method for regulating the flow in a sliding gate and sliding gate for carrying ou this method
DE8888870106T DE3868404D1 (en) 1988-06-09 1988-06-09 METHOD FOR REGULATING THE FLOW RATE ON A SLIDER AND SLIDE VALVE FOR CARRYING OUT THIS METHOD.
AT88870106T ATE72528T1 (en) 1988-06-09 1988-06-09 METHOD OF CONTROLLING THE FLOW RATE AT A VALVE AND VALVE FOR CARRYING OUT THIS PROCESS.
BR898902718A BR8902718A (en) 1988-06-09 1989-06-08 DEBIT REGULATION PROCESS IN A VALVE AND VALVE FOR THE PERFORMANCE OF THE PROCESS
FI892813A FI892813A (en) 1988-06-09 1989-06-08 FOERFARANDE FOER REGLERING AV EN VENTILS STROEMNINGSMAENGD OCH VENTIL FOER TILLAEMPNING AV FOERFARANDET.
JP1145503A JPH0230367A (en) 1988-06-09 1989-06-09 Flow control method in valve and valve using said method
US07/544,056 US5076476A (en) 1988-06-09 1990-06-26 Method for controlling a flow rate in a valve and a valve for the application of said method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP88870106A EP0345407B1 (en) 1988-06-09 1988-06-09 Method for regulating the flow in a sliding gate and sliding gate for carrying ou this method

Publications (2)

Publication Number Publication Date
EP0345407A1 EP0345407A1 (en) 1989-12-13
EP0345407B1 true EP0345407B1 (en) 1992-02-12

Family

ID=8200690

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88870106A Expired - Lifetime EP0345407B1 (en) 1988-06-09 1988-06-09 Method for regulating the flow in a sliding gate and sliding gate for carrying ou this method

Country Status (8)

Country Link
US (1) US5076476A (en)
EP (1) EP0345407B1 (en)
JP (1) JPH0230367A (en)
AT (1) ATE72528T1 (en)
BR (1) BR8902718A (en)
DE (1) DE3868404D1 (en)
ES (1) ES2030535T3 (en)
FI (1) FI892813A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0617139A (en) * 1992-05-27 1994-01-25 Sumitomo Metal Ind Ltd Production of high strength steel sheet for automobile exterior material
EP1707291A1 (en) * 2005-03-10 2006-10-04 Tech-Gate S.A. A linear sliding gate valve for a metallurgical vessel

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4896801A (en) * 1967-07-11 1990-01-30 Flo-Con Systems, Inc. Method for controlling the discharge channel of a casting container (tundish) for metallic meltings, and a device for carrying out the method
JPS6056580B2 (en) * 1977-07-13 1985-12-11 日本鋼管株式会社 Automatic injection method of molten metal using rotary nozzle between ladle and tundish in continuous casting
CH649610A5 (en) * 1980-09-24 1985-05-31 Stopinc Ag LOCKING PLATE PAIR FOR A SLIDING LOCK.
DE3211787A1 (en) * 1981-03-30 1983-02-03 Zimmermann & Jansen GmbH, 5160 Düren Process for the control of discharge gates of casting vessels for metallurgical castings, and device usable for such a process for the exact position indication of a working piston
US4597048A (en) * 1983-09-07 1986-06-24 United States Steel Corporation Digital flow regulation of liquid-level control for a continuous casting mold
DE3433558C2 (en) * 1983-11-18 1986-07-31 Stopinc Ag, Baar Slide closure for the pouring of metallurgical vessels
DE3423157C1 (en) * 1984-06-22 1985-06-20 Metacon AG, Zürich Fireproof pair of plates for pivoting or rotating sliding closures
FR2631266B1 (en) * 1988-05-13 1990-09-14 Detalle Edouard CASTING SHUTTER WITH LINEAR DISPLACEMENT AND AXIAL SYMMETRY

Also Published As

Publication number Publication date
FI892813A0 (en) 1989-06-08
ES2030535T3 (en) 1992-11-01
BR8902718A (en) 1990-01-23
FI892813A (en) 1989-12-10
EP0345407A1 (en) 1989-12-13
DE3868404D1 (en) 1992-03-26
ATE72528T1 (en) 1992-02-15
US5076476A (en) 1991-12-31
JPH0230367A (en) 1990-01-31

Similar Documents

Publication Publication Date Title
EP2007541B1 (en) Orbital carrier comprising at least two components in the form of segments of a circle able to be connected together; device for butt-welding pipes to form a pipeline comprising such an orbital carrier
EP0275757A1 (en) Bidimensional, controllable jet nozzle
EP2705937A1 (en) Wooden logs sawing machine
EP0345407B1 (en) Method for regulating the flow in a sliding gate and sliding gate for carrying ou this method
EP0326461B1 (en) Device and process for projecting a lining on the internal surface of a vessel for the receipt of a molten metal
FR2546199A1 (en) RAILWAY MACHINE WITH THE ROLLING CHASSIS EQUIPPED WITH A DEVICE FOR RAISING AND RIPING A RAILWAY
LU81716A1 (en) SLIDING DOOR VALVE
FR2703935A1 (en) Device for quickly changing and holding a side wall of a machine for continuously casting a metal product between cylinders.
CH646220A5 (en) RAILER OF RAILWAYS.
CA3075530A1 (en) Grinding device for the profiling of a rail of a railway track
FR2802134A1 (en) Machine, for carrying out circular cutting or welding operations on clamped tube, includes eccentric adjustment to crown wheel mounted on plate which can turn through 360 degrees about tube clamped between jaws
CA2254576A1 (en) Abrasive rail saw
EP1380793B1 (en) Mechanical device for the movement of a camera
FR2527115A1 (en) RIBBON SAW AND CASSETTE ASSEMBLY SUPPORTING THE BLADE OF SUCH SAW
CH415205A (en) Valve
FR2516501A1 (en) PRESSURE MOLDING GLASS SHAPING APPARATUS WITH APPLICATION OF BLOCKING FORCE
FR2471825A1 (en) CENTRIFUGAL CASTING MACHINE EQUIPPED WITH MEANS OF MOLD CONSTITUTION FOR AUTOMATICALLY DISMANTLING AND DISCHARGING THE OBTAINED PARTS
FR3108637A1 (en) Railroad Track Profile Grinding Machine
FR2899215A1 (en) CONVEYOR HEAD FOR TRANSPORT VEHICLE OF MATERIALS, AND CONVEYOR EQUIPPED WITH SUCH A HEAD
EP0122904A2 (en) Slide gate nozzle device for a vessel for the iron and steel or metallurgical industry
FR2684035A1 (en) Bearing for a floating spindle, particularly a fixed steady
CA3143095A1 (en) Device for moving a treatment head and a tray
FR2856884A1 (en) Plant cutting machine, has hydraulic jack that is articulated between interior segment and connecting rod, where rod is articulated on interior segment by axle and on another connecting rod on frame
FR2621681A1 (en) Diaphragm for lamp
BE1008119A3 (en) Device with a slide sealing system for regulating the flow rate of ametallurgical container

Legal Events

Date Code Title Description
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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19891220

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: HEPWORTH REFRACTORIES (BELGIUM) S.A.

17Q First examination report despatched

Effective date: 19910510

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

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

Ref country code: SE

Effective date: 19920212

Ref country code: NL

Effective date: 19920212

Ref country code: AT

Effective date: 19920212

REF Corresponds to:

Ref document number: 72528

Country of ref document: AT

Date of ref document: 19920215

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3868404

Country of ref document: DE

Date of ref document: 19920326

ITF It: translation for a ep patent filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

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: 19920515

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: 19920630

Ref country code: CH

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

Effective date: 19920630

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2030535

Country of ref document: ES

Kind code of ref document: T3

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: DIDIER-WERKE AG

Effective date: 19921109

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EPTA Lu: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19940620

Year of fee payment: 7

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

Ref country code: BE

Payment date: 19940628

Year of fee payment: 7

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

Ref country code: DE

Payment date: 19940629

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: 19940630

Year of fee payment: 7

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

Ref country code: LU

Payment date: 19940801

Year of fee payment: 7

RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

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

Free format text: STATUS: PATENT REVOKED

27W Patent revoked

Effective date: 19940623

GBPR Gb: patent revoked under art. 102 of the ep convention designating the uk as contracting state

Free format text: 940623

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

Ref country code: FR

Payment date: 19950531

Year of fee payment: 9