EP0346258A2 - Casting gate for linear and symmetrie axial displacement - Google Patents
Casting gate for linear and symmetrie axial displacement Download PDFInfo
- Publication number
- EP0346258A2 EP0346258A2 EP89470007A EP89470007A EP0346258A2 EP 0346258 A2 EP0346258 A2 EP 0346258A2 EP 89470007 A EP89470007 A EP 89470007A EP 89470007 A EP89470007 A EP 89470007A EP 0346258 A2 EP0346258 A2 EP 0346258A2
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- European Patent Office
- Prior art keywords
- nozzle
- refractory
- parts
- plate
- insert
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Classifications
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- 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
- B22D41/08—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like for bottom pouring
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- 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
- B22D41/26—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 characterised by a rotatively movable plate
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- 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
- B22D41/40—Means for pressing the plates together
Definitions
- the present invention relates to the casting of aggressive or high temperature liquids, in particular liquid metals such as steel.
- the greater or lesser coincidence of the orifices makes it possible to adjust the flow rate.
- the relative movement of the plates can be linear, or even rotary: - In the first case, the orifice (s) of the movable plate move along a straight line. - In the second case, the orifice (s) of the movable plate move in a circle.
- the irruption of the metal causes in the refractory plates a sudden thermal shock, which causes harmful cracking in several respects, in particular: - they make it more or less random to reuse them for subsequent emptying. - They can be the source of untimely aspirations of gas, in particular ambient air, by the fast flowing metal flow.
- the plates must be made of suitable materials: high content of alumina, magnesia, zirconia, etc., particularly sensitive to shocks thermal.
- the object of the present invention is to avoid as far as possible these cracks and this premature wear of the plates.
- the starting point of the thermal shock is in the pouring orifice, where a jet of liquid metal passes at high temperature, in particular if it is steel.
- the heat then diffuses towards the periphery of the plate.
- the thickness of the plate, or closing element also plays a role, since the first face is in contact with the other plate, or element, and the second is oriented, either towards the container, or towards the ambient.
- the tendency to break or crack is greater or less depending on the nature of the refractory material, the physical properties of which, such as thermal expansion, thermal conductivity, etc., vary significantly.
- the invention therefore retains as perfect symmetry as possible of all the elements subjected to thermal shocks and to corrosion caused by the flow of the fluid, in particular liquid steel.
- the main movable plate moves along a straight line or any curve passing through its axis, common to the plate and to its hole. To simplify the rest of the presentation, we will consider the simpler case of rectilinear movement.
- the rotation of the plates can be controlled by any mechanical, hydraulic or electrical process known to those skilled in the art.
- the same source of movement is used for the displacement of the movable plate or its pivoting.
- the plates or elements are produced in two or more parts: for example a central wear part made of particularly noble material (ceramic with high melting point, metallic ceramic, etc.), surrounded by a less noble and less expensive support material (alumina, magnesia, etc.)
- particularly noble material ceramic with high melting point, metallic ceramic, etc.
- a less noble and less expensive support material alumina, magnesia, etc.
- the cylindrical wear distribution technique makes it possible to minimize the size of the central insert, depending on the requirements dictated by the diameter of the hole, the resistance to thermal shocks and to physical and chemical attacks by the fluid. sunk.
- the fixed and movable plates are frequently surrounded by a thick metal banding, hot crimped, intended to protect them against possible disintegration during their dismantling.
- This strapping can advantageously be constituted by a ceramic ring having an adequate elasticity or by a metal ring with shape memory.
- the refractory surround of the insert can serve both as a support and as a hoop, if it is chosen from a suitable material.
- This strapping can be provided with a device preventing any rotation of the movable plate relative to the slide during the pivoting operations during casting.
- the central insert of the movable obturator element is one piece with the lower collecting nozzle.
- the upper surface of the insert / nozzle duly rectified, then constitutes the central element of wear of the mobile shutter: it is integral with the latter by a conical fitting.
- the tapered joint is filled with an adhesive or an adequate refractory grout with quick setting, ensuring the tightness and mechanical consistency of the assembly.
- the sliding assembly can be disassembled, in order to exchange the insert / nozzle, for a new use.
- the insert / nozzle is a "consumable" element, that is to say that after disassembly, its worn upper part is again rectified using a special machine so as to allow a new assembly and a new use.
- the pressure of application of the plates one on the other must ensure sealing and maintain sufficient flexibility to the assembly, and in particular absorb the expansions of the refractory parts: it is exerted by the lower fixed part of the system, called in general "cover".
- This cover is reinforced for example by ribs or side members at the place where it exerts its pressure on the moving assembly.
- balls can be used to ensure the sliding of the slide against the cover.
- the balls are made of ceramic material, as well as the bearing surfaces or they circulate (side members and slide): they can even rest on the rectified underside of the movable plate itself.
- the balls are replaced by smooth bearings made of suitably treated metal, or of ceramic.
- the collecting nozzle, integral with the movable plate is connected to the latter by a refractory seal (grout or dry refractory felt): the nozzle is held against the movable plate by its support.
- a refractory seal grout or dry refractory felt
- the cover no longer exerts its pressure on the slide but on the nozzle, by means of its support.
- a threaded nozzle holder is used; the rotation of the support causes the nozzle to rise and pushes the movable plate upwards against the fixed plate, the reaction forces being absorbed by the cover.
- the tightening of the nozzle can be carried out using a conventional torque wrench.
- the tightening can be carried out effortlessly using the endless screws, racks or drive gears of the sliding assembly: it suffices for this purpose to immobilize the nozzle support at the using a wedge secured to the chassis or the cover, and to rotate the slide in the appropriate direction as if one were carrying out an azimuth operation of the movable plate.
- the shim is replaced by a torque limiting blocking device: in this way, when the tightening of the plates reaches a certain predetermined value, the blocking in rotation of the nozzle is eliminated, and it can again rotate freely, integral with the assembly of the slide.
- the dynamometric blocking device can then be removed, to avoid thermal stresses from the casting of the metal.
- the movable plate inside the slide must keep a small possibility of vertical movement, parallel to itself, to allow clamping by the nozzle, but it must not be able to turn in order to avoid any loosening during use.
- the plate is left free to rotate in its housing at the same time as the nozzle to avoid any sliding at the joint; in this case it is also possible to use an insert / nozzle, as described below. The assembly is then locked against any new rotation during use.
- this type of tightening is adapted to the case of a device with 3 plates: in fact the collecting nozzle remaining immobile in the axis of the fixed plate, the tightening forces do not move.
- the movable plate and the collecting nozzle are pre-assembled or cast in one piece, and form a monobloc assembly.
- the collecting nozzle is positioned in a conventional manner by introducing it from the inside of the slide before putting the movable plate: this arrangement does not allow the independent mounting and dismounting of the nozzle.
- the worms can be controlled, for example, by two electric motors controlled and adjusted independently.
- Adequate cooling is provided to ensure proper operation of the assembly.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Pens And Brushes (AREA)
- Insulators (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Processing Of Solid Wastes (AREA)
- Surgical Instruments (AREA)
- Continuous Casting (AREA)
- Table Devices Or Equipment (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
L'invention concerne un dispositif de coulée des métaux liquides tels l'acier.Il est fondamentalement constitué :- d'une busette (2), dite busette interne, en matériau réfractaire- d'une plaque fixe (3) ronde comportant un trou axial en coïncidence avec celui de la busette (2), en matériau réfractaire- d'une plaque mobile (4) ronde, comportant un trou central d'axe (23), en matériau réfractaire- d'une busette (5), dite busette collectrice, solidaire de la plaque mobile (4), en matériau réfractaire, destinée à stabiliser le jet déviéLa plaque mobile (4) peut subir un déplacement (17) suivant une ligne droite ou quelconque, de manière à obturer plus ou moins le trou de la plaque fixe (3).La plaque mobile (4) est également susceptible de pivoter autour de son axe (23)La symétrie de forme des différents éléments réfractaires par rapport à leurs orifices, traversés par le métal à haute température, confère à l'ensemble des caractéristiques de dilatation et de résistance aux chocs thermiques optimales.Enfin, la possibilité de faire pivoter la plaque (4), ainsi qu'éventuellement la plaque (3), autour de leurs axes respectifs, permet de répartir l'usure des trous de manière symétrique et de diminuer l'amplitude des déplacements (17).The invention relates to a device for casting liquid metals such as steel.It basically consists of: - a nozzle (2), called an internal nozzle, made of refractory material - a fixed round plate (3) comprising a hole axial in coincidence with that of the nozzle (2), in refractory material - of a movable plate (4) round, comprising a central hole of axis (23), in refractory material - of a nozzle (5), called collecting nozzle, integral with the movable plate (4), made of refractory material, intended to stabilize the deflected jet The movable plate (4) can be moved (17) along a straight line or any other, so as to more or less close the hole of the fixed plate (3). The movable plate (4) is also capable of pivoting around its axis (23) The symmetry of shape of the various refractory elements with respect to their orifices, through which the metal passes at high temperature, gives all the expansion and thermal shock resistance characteristics Finally, the possibility of rotating the plate (4), as well as possibly the plate (3), around their respective axes, makes it possible to distribute the wear of the holes symmetrically and to reduce the amplitude of the displacements (17).
Description
La présente invention concerne la coulée des liquides agressifs ou à haute température, en particuliers les métaux liquides comme l'acier.The present invention relates to the casting of aggressive or high temperature liquids, in particular liquid metals such as steel.
Parmi les dispositifs permettant de procéder à la vidange des conteneurs des métaux liquides comme l'acier, l'un des plus répandus est celui dit à tiroir.Among the devices for emptying containers of liquid metals such as steel, one of the most common is that known as a drawer.
Celui-ci consiste essentiellement à faire glisser l'une sur l'autre deux plaques en matériau approprié, réfractaire dans le cas des métaux liquides.This essentially consists in sliding one over the other two plates of suitable material, refractory in the case of liquid metals.
L'une de ces plaques est fixe, l'autre mobile ; elles sont munies chacune d'un orifice de diamètre approprié.One of these plates is fixed, the other mobile; they are each provided with an orifice of appropriate diameter.
La coïncidence plus ou moins grande des orifices permet de régler le débit.The greater or lesser coincidence of the orifices makes it possible to adjust the flow rate.
Leur non-coïncidence stoppe la vidange.Their non-coincidence stops the emptying.
Le déplacement relatif des plaques peut être linéaire, ou encore rotatif:
- dans le premier cas, le ou les orifices de la plaque mobile se déplacent suivant une droite.
- dans le deuxième cas, le ou les orifices de la plaque mobile se déplacent suivant un cercle.The relative movement of the plates can be linear, or even rotary:
- In the first case, the orifice (s) of the movable plate move along a straight line.
- In the second case, the orifice (s) of the movable plate move in a circle.
Dans le cas de la coulée de l'acier, l'irruption du métal provoque dans les plaques réfractaires un choc thermique brutal, qui entraîne des fissurations nuisibles à plusieurs égards, notamment:
- elles rendent plus ou moins aléatoires la réutilisation de celles-ci pour des vidanges ultérieures.
- elles peuvent être à l'origine d'aspirations intempestives de gaz, notamment d'air ambiant, par le flux de métal en écoulement rapide.In the case of casting of steel, the irruption of the metal causes in the refractory plates a sudden thermal shock, which causes harmful cracking in several respects, in particular:
- they make it more or less random to reuse them for subsequent emptying.
- They can be the source of untimely aspirations of gas, in particular ambient air, by the fast flowing metal flow.
En effet, les plaques, pour résister aux diverses contraintes, pression ferrostatique, température du métal, caractéristiques de glissement, etc., doivent être fabriquées dans des matières appropriées : haute teneur en alumine, magnésie, zircone, etc., particulièrement sensibles aux chocs thermiques.In fact, to resist various stresses, ferrostatic pressure, metal temperature, sliding characteristics, etc., the plates must be made of suitable materials: high content of alumina, magnesia, zirconia, etc., particularly sensitive to shocks thermal.
D'autre part, le principe même de fonctionnement des fermetures coulissantes connues actuellement concentre l'usure des plaques dans une ou deux zônes situées sur le trajet de déplacement relatif des plaques.On the other hand, the very principle of operation of currently known sliding closures concentrates the wear of the plates in one or two zones located on the relative movement path of the plates.
Il en résulte une ovalisation du trou des plaques, prolongée par une érosion en "languette", qui finit par entraîner la mise au rebut prématurée de celles-ci.This results in an ovalization of the hole in the plates, prolonged by erosion in a "tongue", which ends up causing the premature disposal of the latter.
Ces remarques s'appliquent également aux dispositifs, dits " à 3 plaques", où la plaque mobile coulisse entre 2 plaques fixes.These remarks also apply to so-called "3-plate" devices, where the movable plate slides between 2 fixed plates.
Le but de la présente invention est d'éviter dans la mesure du possible ces fissurations et cette usure prématurée des plaques.The object of the present invention is to avoid as far as possible these cracks and this premature wear of the plates.
Les études que nous avons menées nous ont montré que, si la nature des matériaux utilisés pour les plaques réfractaires les rend particulièrement sensibles aux chocs thermiques, l'apparition des fissures est due essentiellement à la forme dissymétrique des plaques.The studies that we have conducted have shown us that, if the nature of the materials used for refractory plates makes them particularly sensitive to thermal shock, the appearance of cracks is mainly due to the asymmetrical shape of the plates.
En effet, le point de départ du choc thermique se trouve dans l'orifice de coulée, où passe un jet de métal liquide à haute température, en particulier s'il s'agit d'acier.Indeed, the starting point of the thermal shock is in the pouring orifice, where a jet of liquid metal passes at high temperature, in particular if it is steel.
La chaleur diffuse alors vers la périphérie de la plaque.The heat then diffuses towards the periphery of the plate.
Or dans tous les cas connus actuellement, l'onde de chaleur doit, pour atteindre la périphérie de la plaque où règne une température sensiblement plus basse, parcourir des chemins de longueurs trés différentes, d'où des tensions de rupture importantes.However, in all the cases currently known, the heat wave must, in order to reach the periphery of the plate where a substantially lower temperature prevails, travel paths of very different lengths, hence significant breaking voltages.
On le comprend facilement en examinant la configuration des plaques de tiroir linéaires ou rotatifs actuellement exploités, à un ou plusieurs orifices.This is easily understood by examining the configuration of the linear or rotary drawer plates currently used, with one or more orifices.
Il apparaît donc que la solution idéale est de mettre au point un obturateur linéaire à plaques rondes et à un seul orifice central.It therefore appears that the ideal solution is to develop a linear shutter with round plates and a single central orifice.
Dans la suite de l'exposé nous emploierons aussi bien le terme "plaque" que le terme "élément de fermeture", suivant que la hauteur est petite, voisine ou grande vis à vis du diamètre extérieur.In the rest of the presentation, we will use the term "plate" as well as the term "closure element", depending on whether the height is small, close or large with respect to the outside diameter.
Dans cet obturateur, le chemin à parcourir par l'onde de chaleur, entre l'orifice de coulée et la périphérie, est le même dans tous les azimuts.In this shutter, the path to be traveled by the heat wave, between the pouring orifice and the periphery, is the same in all directions.
L'épaisseur de la plaque, ou élément de fermeture, joue également un rôle, étant donné que la première face est en contact avec l'autre plaque, ou élément, et que la deuxième est orientée, soit vers le conteneur, soit vers le milieu ambiant.The thickness of the plate, or closing element, also plays a role, since the first face is in contact with the other plate, or element, and the second is oriented, either towards the container, or towards the ambient.
Toutefois, la tendance à la rupture ou à la fissuration est plus ou moins grande suivant la nature du matériau réfractaire, dont les propriétés physiques telles que dilatation thermique, conductibilité thermique, etc., varient de façon importante.However, the tendency to break or crack is greater or less depending on the nature of the refractory material, the physical properties of which, such as thermal expansion, thermal conductivity, etc., vary significantly.
Cela signifie qu'il existe une fourchette de tolérance entre les longueurs des chemins parcourus par l'onde thermique entre son point de départ (périphérie de l'orifice de coulée) et son point d'arrivée (périphérie de la plaque).This means that there is a tolerance range between the lengths of the paths traveled by the thermal wave between its starting point (periphery of the pouring orifice) and its end point (periphery of the plate).
Ceci autorise donc à admettre, en dehors de la forme ronde, idéale, des formes polygonales symétriques respectant cette tolérance entre le chemin le plus long et le chemin le plus court à parcourir entre le bord du trou et le bord de la plaque.This therefore allows to admit, apart from the ideal round shape, symmetrical polygonal shapes respecting this tolerance between the longest path and the shortest path to be traveled between the edge of the hole and the edge of the plate.
Plus le nombre de côtés du polygone augmente, plus on se rapproche du cercle parfait; à l'opposé, le carré est un cas particulièrement défavorable, où les distorsions entre différents trajets de l'onde thermique sont accentuées.The more the number of sides of the polygon increases, the closer we get to the perfect circle; in contrast, the square is a particularly unfavorable case, where the distortions between different paths of the thermal wave are accentuated.
En dehors des formes géométriques classiques, on peut imaginer toutes formes quelconques, ovales ou autres, mais les règles ci-dessus s'appliquent toujours, avec plus ou moins de rigueur suivant la nature du réfractaire ou du matériau utilisé.Apart from the classic geometric shapes, one can imagine any arbitrary shape, oval or other, but the above rules always apply, with more or less rigor depending on the nature of the refractory or the material used.
L'invention conserve donc une symétrie aussi parfaite que possible de tous les éléments soumis aux chocs thermiques et à la corrosion provoqués par l'écoulement du fluide, en particulier l'acier liquide.The invention therefore retains as perfect symmetry as possible of all the elements subjected to thermal shocks and to corrosion caused by the flow of the fluid, in particular liquid steel.
Il s'agit d'un obturateur à déplacement linéaire.It is a linear displacement shutter.
Il fait appel à au moins 2 ou 3 éléments ou plaques de formes rondes (ou polygonales proches), percées de trous axiaux.It uses at least 2 or 3 elements or plates of round (or close polygonal) shapes, pierced with axial holes.
La plaque mobile principale se déplace suivant une droite ou une courbe quelconque passant par son axe, commun à la plaque et à son trou. Pour simplifier la suite de l'exposé on considèrera le cas plus simple du mouvement rectiligne.The main movable plate moves along a straight line or any curve passing through its axis, common to the plate and to its hole. To simplify the rest of the presentation, we will consider the simpler case of rectilinear movement.
Il a déjà été mentionné plus haut que le principe même de l'obturateur à déplacement linéaire amène une usure des orifices localisée aux régions voisines de l'axe de translation.It has already been mentioned above that the very principle of the linear displacement shutter leads to wear of the orifices located in the regions close to the translation axis.
Pour pallier cet inconvénient, et du fait même que les plaques rondes n'ont pas d'axe privilégié dans le plan, il est prévu de déplacer la zône d'usure sur tout le pourtour du trou par une rotation adéquate des plaques autour de leur axe.To overcome this drawback, and by the very fact that the round plates do not have a privileged axis in the plane, it is planned to move the wear zone around the entire periphery of the hole by an adequate rotation of the plates around their axis.
En effectuant cette rotation chaque fois que nécessaire, il sera possible d'éviter l'ovalisation du trou, si préjudiciable à la durée de vie des plaques, et d'obtenir un agrandissement progressif et circulaire du diamètre.By performing this rotation whenever necessary, it will be possible to avoid ovalization of the hole, which is detrimental to the life of the plates, and to obtain a gradual and circular enlargement of the diameter.
La rotation des plaques peut être commandée par tout procédé mécanique, hydraulique ou électrique connu de l'homme de l'art.The rotation of the plates can be controlled by any mechanical, hydraulic or electrical process known to those skilled in the art.
La course nécessaire pour obtenir la régulation ou l'interruption du débit du fluide sera parallèlement réduite puisque l'usure sera répartie sur tout le périmètre du trou et non plus en un ou deux points.The stroke necessary to obtain regulation or interruption of the fluid flow will be reduced in parallel since the wear will be distributed over the entire perimeter of the hole and no longer at one or two points.
Dans le cas d'un tiroir à 3 plaques, cela peut s'appliquer non seulement à la plaque de travail médiane, mais aussi aux plaques normalement fixes, supérieure et inférieure.In the case of a 3-plate drawer, this can apply not only to the middle work plate, but also to the normally fixed, upper and lower plates.
Selon une variante de l'invention, la même source de mouvement est employée pour le déplacement de la plaque mobile ou son pivotement.According to a variant of the invention, the same source of movement is used for the displacement of the movable plate or its pivoting.
On peut imaginer un dispositif contrôlé par un microprocesseur, qui effectuerait la rotation automatique des plaques chaque fois que nécessaire, en fonction de paramètres mis préalablement en mémoire tels que, type de métal à couler, quantité, etc. ou mesurés en temps réel tels que, température, course du vérin, etc.One can imagine a device controlled by a microprocessor, which would perform the automatic rotation of the plates whenever necessary, according to parameters previously stored in memory such as, type of metal to be poured, quantity, etc. or measured in real time such as, temperature, cylinder stroke, etc.
Selon une variante de l'invention, les plaques ou éléments sont réalisés en deux ou plusieurs parties : par exemple une partie centrale d'usure en matériau particulièrement noble (céramique à haut point de fusion, céramique métallique, etc.), entourée d'un matériau de soutien moins noble et moins coûteux (alumine, magnésie, etc.)According to a variant of the invention, the plates or elements are produced in two or more parts: for example a central wear part made of particularly noble material (ceramic with high melting point, metallic ceramic, etc.), surrounded by a less noble and less expensive support material (alumina, magnesia, etc.)
Dans ce cas, la technique de répartition cylindrique de l'usure permet de réduire au minimum la taille de l'insert central, en fonction des impératifs dictés par le diamètre du trou, la résistance aux chocs thermiques et aux attaques physiques et chimiques du fluide coulé.In this case, the cylindrical wear distribution technique makes it possible to minimize the size of the central insert, depending on the requirements dictated by the diameter of the hole, the resistance to thermal shocks and to physical and chemical attacks by the fluid. sunk.
Dans les systèmes de fermetures couramment utilisés pour la coulée de l'acier, les plaques fixes et mobiles sont fréquemment entourées d'un cerclage métallique épais, serti à chaud, destiné à les protéger contre une éventuelle désagrégation lors de leur démontage.In the closure systems commonly used for casting steel, the fixed and movable plates are frequently surrounded by a thick metal banding, hot crimped, intended to protect them against possible disintegration during their dismantling.
Ce cerclage peut avantageusement être constitué par un anneau en céramique présentant une élasticité adéquate ou par un anneau en métal à mémoire de forme.This strapping can advantageously be constituted by a ceramic ring having an adequate elasticity or by a metal ring with shape memory.
Dans le cas d'un insert, l'entourage réfractaire de l'insert peut servir à la fois de support et de cerclage, s'il est choisi dans un matériau adéquat.In the case of an insert, the refractory surround of the insert can serve both as a support and as a hoop, if it is chosen from a suitable material.
Ce cerclage peut être pourvu d'un dispositif évitant toute rotation de la plaque mobile par rapport au coulisseau lors des opérations de pivotement en cours de coulée.This strapping can be provided with a device preventing any rotation of the movable plate relative to the slide during the pivoting operations during casting.
Selon une variante de l'invention, l'insert central de l'élément obturateur mobile ne fait qu'une seule pièce avec la busette collectrice inférieure.According to a variant of the invention, the central insert of the movable obturator element is one piece with the lower collecting nozzle.
La surface supérieure de l'insert/busette, dûment rectifiée, constitue alors l'élément central d'usure de l'obturateur mobile : il est solidaire de celui-ci par un emboîtement cônique.The upper surface of the insert / nozzle, duly rectified, then constitutes the central element of wear of the mobile shutter: it is integral with the latter by a conical fitting.
Le joint cônique est rempli par une colle ou un coulis réfractaire adéquat à prise rapide, assurant l'étanchéité et la cohérence mécanique de l'ensemble.The tapered joint is filled with an adhesive or an adequate refractory grout with quick setting, ensuring the tightness and mechanical consistency of the assembly.
Aprés usage, l'ensemble coulissant peut être désassemblé, pour procéder à l'échange de l'insert/busette, en vue d'une nouvelle utilisation.After use, the sliding assembly can be disassembled, in order to exchange the insert / nozzle, for a new use.
Selon une variante de l'invention, l'insert/busette est un élément "consommable", c'est à dire qu'aprés démontage, sa partie supérieure usée est à nouveau rectifiée à l'aide d'une machine spéciale de manière à permettre un nouveau montage et une nouvelle utilisation.According to a variant of the invention, the insert / nozzle is a "consumable" element, that is to say that after disassembly, its worn upper part is again rectified using a special machine so as to allow a new assembly and a new use.
La pression d'application des plaques les unes sur les autres doit assurer l'étanchéité et conserver une souplesse suffisante à l'ensemble, et en particulier absorber les dilatations des pièces réfractaires : elle est exercée par la partie fixe inférieure du système, appelée en général "couvercle". Ce couvercle est renforcé par exemple par des nervures ou des longerons à l'endroit ou il exerce sa pression sur l'équipage mobile.The pressure of application of the plates one on the other must ensure sealing and maintain sufficient flexibility to the assembly, and in particular absorb the expansions of the refractory parts: it is exerted by the lower fixed part of the system, called in general "cover". This cover is reinforced for example by ribs or side members at the place where it exerts its pressure on the moving assembly.
De manière à diminuer les frottements, on peut avoir recours à des billes pour assurer le glissement du coulisseau contre le couvercle.In order to reduce friction, balls can be used to ensure the sliding of the slide against the cover.
Selon une variante de l'invention, les billes sont en matériau céramique, ainsi que les portées ou elles circulent (longerons et coulisseau) : elles peuvent même s'appuyer sur la face inférieure rectifiée de la plaque mobile elle-même.According to a variant of the invention, the balls are made of ceramic material, as well as the bearing surfaces or they circulate (side members and slide): they can even rest on the rectified underside of the movable plate itself.
Selon une autre variante les billes sont remplacées par des portées lisses en métal convenablement traité, ou en céramique.According to another variant, the balls are replaced by smooth bearings made of suitably treated metal, or of ceramic.
La busette collectrice, solidaire de la plaque mobile est reliée à celle-ci par un joint réfractaire (coulis ou feutre réfractaire sec) : la busette est maintenue contre la plaque mobile par son support.The collecting nozzle, integral with the movable plate is connected to the latter by a refractory seal (grout or dry refractory felt): the nozzle is held against the movable plate by its support.
Pour exercer la pression de serrage du couvercle sur l'ensemble, on peut avoir recours à des ressorts métalliques ou céramiques, des petits vérins hydrauliques ou pneumatiques, ou compter sur l'allongement naturel de vis de serrage ou des différentes pièces mécaniques judicieusement calculées, ou utiliser tout autre moyen connu de l'homme de l'art.To exert the clamping pressure of the cover on the assembly, it is possible to have recourse to metallic or ceramic springs, small hydraulic or pneumatic cylinders, or to rely on the natural elongation of clamping screws or of various judiciously calculated mechanical parts, or use any other means known to those skilled in the art.
Etant donné la symétrie axiale propre à la présente invention, il est possible d'utiliser la busette pour serrer les plaques l'une contre l'autre dans la zône la plus importante et la plus efficace : celle qui entoure le trou.Given the axial symmetry specific to the present invention, it is possible to use the nozzle to clamp the plates against each other in the most important and most effective zone: that which surrounds the hole.
C'est en effet là que le métal peut commencer à s'infiltrer, c'est également là que les contraintes thermiques sont les plus sévères.It is indeed there that the metal can start to infiltrate, it is also there that the thermal stresses are the most severe.
Selon une variante de l'invention, le couvercle n'exerce plus sa pression sur le coulisseau mais sur la busette, par l'intermédiaire de son support.According to a variant of the invention, the cover no longer exerts its pressure on the slide but on the nozzle, by means of its support.
Selon une variante de l'invention, on utilise un support de busette fileté ; la rotation du support fait monter la busette et pousse la plaque mobile vers le haut, contre la plaque fixe, les efforts de réactions étant absorbés par le couvercle.According to a variant of the invention, a threaded nozzle holder is used; the rotation of the support causes the nozzle to rise and pushes the movable plate upwards against the fixed plate, the reaction forces being absorbed by the cover.
Le serrage de la busette peut être effectué à l'aide d'une clé dynamométrique classique.The tightening of the nozzle can be carried out using a conventional torque wrench.
Selon une variante de l'invention, le serrage peut être effectué sans effort à l'aide des vis sans fin, crémaillères ou engrenages d'entraînement de l'ensemble coulissant : il suffit à cet effet d'immobiliser le support de busette à l'aide d'une cale solidaire du chassis ou du couvercle, et de faire tourner le coulisseau dans le sens approprié comme si on effectuait une opération d'azimutage de la plaque mobile.According to a variant of the invention, the tightening can be carried out effortlessly using the endless screws, racks or drive gears of the sliding assembly: it suffices for this purpose to immobilize the nozzle support at the using a wedge secured to the chassis or the cover, and to rotate the slide in the appropriate direction as if one were carrying out an azimuth operation of the movable plate.
Au cours de cette opération, le couple de serrage des moteurs ou des vérins sera limité, afin de ne pas serrer exagérément les plaques.During this operation, the tightening torque of the motors or cylinders will be limited, so as not to over-tighten the plates.
Aprés le serrage, la cale devra bien entendu être retirée.After tightening, the shim must of course be removed.
Dans une autre variante de l'invention, la cale est remplacée par un dispositif de blocage à limitation de couple : de la sorte, quand le serrage des plaques atteint une certaine valeur prédéterminée, le blocage en rotation de la busette est supprimé, et elle peut à nouveau tourner librement, solidaire de l'ensemble du coulisseau.In another variant of the invention, the shim is replaced by a torque limiting blocking device: in this way, when the tightening of the plates reaches a certain predetermined value, the blocking in rotation of the nozzle is eliminated, and it can again rotate freely, integral with the assembly of the slide.
Le dispositif de blocage dynamométrique peut être ensuite retiré, pour lui éviter les contraintes thermiques de la coulée du métal.The dynamometric blocking device can then be removed, to avoid thermal stresses from the casting of the metal.
Un serrage de ce type doit être effectué en position ouverte, quand toutes les pièces réfractaires sont coaxiales ; on peut ensuite passer en position fermeture.A tightening of this type must be carried out in the open position, when all the refractory parts are coaxial; you can then switch to the closed position.
Il suppose également l'emploi d'un joint busette collectrice/ plaque mobile supportant le glissement relatif des deux pièces pendant l'opération de serrage (par exemple feutre céramique).It also supposes the use of a collecting nozzle / movable plate seal supporting the relative sliding of the two parts during the tightening operation (for example ceramic felt).
La plaque mobile à l'intérieur du coulisseau doit conserver une petite possibilité de déplacement vertical, parallèlement à elle-même, afin de permettre le serrage par la busette, mais elle ne doit pas pouvoir tourner afin d'éviter tout desserrage en cours d'utilisation.The movable plate inside the slide must keep a small possibility of vertical movement, parallel to itself, to allow clamping by the nozzle, but it must not be able to turn in order to avoid any loosening during use.
Selon une variante de l'invention, on laisse la plaque libre de tourner dans son logement en même temps que la busette pour éviter tout glissement au niveau du joint ; dans ce cas on peut aussi utiliser un insert/busette, comme décrit plus loin. L'ensemble est ensuite verrouillé contre toute nouvelle rotation en cours d'utilisation.According to a variant of the invention, the plate is left free to rotate in its housing at the same time as the nozzle to avoid any sliding at the joint; in this case it is also possible to use an insert / nozzle, as described below. The assembly is then locked against any new rotation during use.
Etant donné la faible course de cette fermeture, le porte-à-faux créé par le décentrement de la busette en position fermée ne compromettra pas l'étanchéité de l'ensemble, les deux plaques restant en contact sur la majeure partie de leur surface.Given the short stroke of this closure, the overhang created by the decentering of the nozzle in the closed position will not compromise the tightness of the assembly, the two plates remaining in contact over most of their surface.
Selon une variante de l'invention, ce type de serrage est adapté au cas d'un dispositif à 3 plaques : en effet la busette collectrice restant immobile dans l'axe de la plaque fixe, les forces de serrage ne se déplacent pas.According to a variant of the invention, this type of tightening is adapted to the case of a device with 3 plates: in fact the collecting nozzle remaining immobile in the axis of the fixed plate, the tightening forces do not move.
Dans ce cas un serrage classique de la busette à l'aide d'une clé dynamométrique semble plus adapté.In this case a conventional tightening of the nozzle using a torque wrench seems more suitable.
Selon une autre variante, la plaque mobile et la busette collectrice sont préassemblées ou coulées en une pièce, et forment un ensemble monobloc.According to another variant, the movable plate and the collecting nozzle are pre-assembled or cast in one piece, and form a monobloc assembly.
Selon une autre variante de l'invention, la busette collectrice est positionnée de manière classique en l'introduisant par l'intérieur du coulisseau avant de mettre la plaque mobile: cette disposition ne permet pas le montage et le démontage indépendants de la busette.According to another variant of the invention, the collecting nozzle is positioned in a conventional manner by introducing it from the inside of the slide before putting the movable plate: this arrangement does not allow the independent mounting and dismounting of the nozzle.
Les conséquences de la symétrie axiale et de l'utilisation rationnelle des éléments obturateurs sont nombreuses :
- suppression ou diminution sensible des phénomènes de fissuration dans le cas des éléments réfractaires, d'où la possibilité d'employer des réfractaires nouveaux sensibles aux chocs thermiques.
- usure harmonieuse des orifices de passage du fluide, d'où diminution des perturbations dynamiques d'écoulement.
- diminution de la dimension des éléments obturateurs par rapport au diamètre d'écoulement.
- diminution de l'amplitude de course nécessaire pour l'obturateur.
- suppression ou diminution des encrassements et dépôts unidirectionnels dans le canal de coulée du fait du pivotement de l'élément/plaque; les caractéristiques de pivotement de la plaque coulissante peuvent être optimisées de manière à combattre tout spécialement les dépôts (rotations de a° + 180° en sens opposés par exemple).The consequences of axial symmetry and the rational use of obturating elements are numerous:
- Suppression or significant reduction of cracking phenomena in the case of refractory elements, hence the possibility of using new refractories sensitive to thermal shock.
- harmonious wear of the fluid passage orifices, which reduces dynamic flow disturbances.
- reduction in the size of the shutter elements relative to the flow diameter.
- reduction in the range of travel required for the shutter.
- removal or reduction of fouling and unidirectional deposits in the casting channel due to the pivoting of the element / plate; the pivoting characteristics of the sliding plate can be optimized so as to combat deposits in particular (rotations of a ° + 180 ° in opposite directions for example).
D'autre part, la suppression des tensions dûe à la transmission homogène de l'onde thermique rend possible la rectification des plaques ou pièces réfractaires sur leurs deux faces et leur réutilisation aprés retournement, leur face inférieure devenant supérieure et vice-versa, sans entraîner les fissurations ordinairement constatées avec les configurations de plaques actuellement connues.On the other hand, the elimination of the tensions due to the homogeneous transmission of the thermal wave makes it possible to rectify the plates or refractory pieces on their two faces and their reuse after reversal, their lower face becoming upper and vice versa, without causing the cracks ordinarily observed with the currently known plate configurations.
De la sorte, les orifices de coulée retrouvent des bords d'attaque pratiquement neufs.In this way, the pouring orifices find practically new leading edges.
Prenant en compte le fait que le centre du flux de chaleur doit être aussi équidistant que possible de la périphérie des plaques, il apparaît qu'il y a intérêt à couler " plein jet", de façon à éviter un décentrement et une rupture excessifs du flux de métal, entraînant en outre les inconvénients habituels : éclatement du jet à la sortie de l'obturateur, turbulences excessives, phénomènes de cavitation, aspirations de gaz extérieur,etc.Taking into account the fact that the center of the heat flow must be as equidistant as possible from the periphery of the plates, it appears that there is interest in pouring "full jet", so as to avoid excessive decentering and breaking of the metal flow, which also leads to the usual disadvantages: bursting of the jet at the outlet of the shutter, excessive turbulence, cavitation phenomena, suction of external gas, etc.
Pour ce faire, il est souhaitable, quand cela est possible d'optimiser le diamètre de départ des plaques en fonction du débit souhaité.To do this, it is desirable, when possible, to optimize the starting diameter of the plates as a function of the desired flow rate.
Néanmoins, par son principe même, ce type d'obturateur est "à faible course", et les décentrements sont réduits au strict minimum.However, by its very principle, this type of shutter is "short stroke", and the offsets are reduced to the strict minimum.
Les dessins annexés illustrent l'invention :
- La figure 1 représente en coupe un dispositif classique, installé sur une poche de coulée d'acier représenté partiellement avec sa paroi en acier (21), son revêtement réfractaire protecteur (22) dans lequel est maçonné la brique de siège (1) et la busette interne (2). Figurent également :
- la plaque fixe (3)
- la plaque mobile coulissante (4)
- la busette externe collectrice (5)
- la languette (14) correspondant à l'érosion dûe au passage du métal liquide lorsqu'on décale la plaque coulissante (4) par rapport à la plaque fixe (3).
- le vérin hydraulique (13) qui assure les mouvements d'ouverture, de fermeture ou de réglage du dispositif.
- (17) représente le décalage maximum possible entre les orifices ou "course" du système. - La figure 2 représente, vue de dessus, la plaque supérieure fixe (3) d'un dispositif classique, ainsi que, partiellement cachée, la plaque inférieure coulissante (4) en position de fermeture avec la languette d'usure (14). Sont figurés également deux trajets (15) différents pour l'onde thermique, partant de l'orifice de passage du métal liquide jusqu'à la périphérie de la plaque.
- La figure 3 représente une plaque de dispositif classique rotatif à 2 trous, avec là également les différents trajets (15) de l'onde thermique.
- La figure 4 représente un schéma de principe du dispositif selon l'invention, avec des plaques fixe (3) et coulissante (4) rondes à orifice central. La plaque coulissante (4) est également susceptible de tourner autour de son axe (23).
- La figure 5 représente deux cas extrêmes de polygones à symétrie axiale par rapport à l'axe du trou : dans le cas du carré on voit que les différences de trajets (15) de l'onde thermique sont trés accentuées en comparaison du nonagone.
- Les figures 6
et 7 montrent les plaques d'un dispositif classique (fig.6) et celles d'un dispositif selon l'invention (fig.7), vues de dessous. On voit les différences entre l'usure en languette (14) du système linéaire classique (fig.6) et l'usure symétrique répartie sur le pourtour du trou (16) du système selon l'invention (fig.7), où la plaque coulissante (4) peut tourner sur son axe. Est figurée également la diminution de course (17) obtenue entre le dispositif classique (fig.6) et le dispositif selon l'invention (fig.7). - La figure 8 représente une réalisation selon l'invention vue de dessous.
- La figure 9 représente, en coupe AA, la réalisation selon l'invention de la figure 8.
- La figure 10 représente, en coupe BB, la réalisation selon l'invention de la figure 8.
- La figure 11 représente un schéma classique de réalisation d'obturateur coulissant à trois plaques : (3) désigne les deux plaques fixes qui enserrent la plaque mobile (3). L'intérêt principal de ce genre de système est que la busette collectrice (5) reste fixe au lieu de se déplacer avec la plaque mobile.
- La figure 12 représente une réalisation selon l'invention dans laquelle on utilise un insert/busette (4-5).
- Figure 1 shows in section a conventional device, installed on a steel casting ladle shown partially with its steel wall (21), its protective refractory lining (22) in which is built the seat brick (1) and the internal nozzle (2). Also included:
- the fixed plate (3)
- the sliding movable plate (4)
- the external collecting nozzle (5)
- The tongue (14) corresponding to the erosion due to the passage of liquid metal when the sliding plate (4) is offset relative to the fixed plate (3).
- the hydraulic cylinder (13) which ensures the opening, closing or adjusting movements of the device.
- (17) represents the maximum possible offset between the orifices or "stroke" of the system. - FIG. 2 represents, seen from above, the fixed upper plate (3) of a conventional device, as well as, partially hidden, the sliding lower plate (4) in the closed position with the wear tab (14). Also shown are two different paths (15) for the thermal wave, starting from the orifice for the passage of the liquid metal to the periphery of the plate.
- FIG. 3 represents a plate of a conventional rotary device with 2 holes, there again with the different paths (15) of the thermal wave.
- Figure 4 shows a block diagram of the device according to the invention, with fixed (3) and sliding (4) round plates with central orifice. The sliding plate (4) is also capable of rotating around its axis (23).
- FIG. 5 represents two extreme cases of polygons with axial symmetry with respect to the axis of the hole: in the case of the square we see that the differences in the paths (15) of the thermal wave are very accentuated in comparison with the nonagon.
- Figures 6 and 7 show the plates of a conventional device (fig.6) and those of a device according to the invention (fig.7), seen from below. We see the differences between the tongue wear (14) of the classic linear system (fig. 6) and the symmetrical wear distributed around the periphery of the hole (16) of the system according to the invention (fig. 7), where the sliding plate (4) can rotate on its axis. Also shown is the reduction in travel (17) obtained between the conventional device (fig. 6) and the device according to the invention (fig. 7).
- FIG. 8 represents an embodiment according to the invention seen from below.
- FIG. 9 represents, in section AA, the embodiment according to the invention of FIG. 8.
- FIG. 10 represents, in section BB, the embodiment according to the invention of FIG. 8.
- FIG. 11 represents a conventional diagram of embodiment of a sliding shutter with three plates: (3) designates the two fixed plates which enclose the movable plate (3). The main advantage of this kind of system is that the collecting nozzle (5) remains fixed instead of moving with the movable plate.
- FIG. 12 represents an embodiment according to the invention in which an insert / nozzle (4-5) is used.
Selon un exemple de configuration représenté par les figures 8,9 & 10 et destiné à une poche de coulée d'acier, le dispositif comporte, dans un agencement classique à deux plaques, de haut en bas :
- la brique de siège (1) (en 1 ou plusieurs parties), maçonnée dans le revêtement de poche selon les méthodes habituelles.
- la busette interne (2) (en 1 ou plusieurs parties), maçonnée dans la brique de siège à l'aide d'un mortier ou coulis approprié.
- le chassis de la fermeture (13), pièce métallique usinée, trés robuste, qui supporte l'ensemble des éléments et assure la constance de géométrie de l'ensemble; il est solidement fixé à la tôle de fond de poche (14).
- la plaque fixe (3) ronde, fixée dans le chassis à l'aide d'un dispositif à mâchoires ou autre, évitant toute contrainte mécanique localisée; de petits ergots peuvent être prévus pour empêcher toute rotation intempestive.
- la plaque coulissante et pivotante (4), fixée dans le coulisseau pivotant (20), par un dispositif analogue à celui de la plaque fixe.
- le coulisseau pivotant (6), muni d'une denture externe (10), destinée tant à l'application du mouvement linéaire qu'à la rotation de la plaque mobile (4).
- le support de busette collectrice (19), qui en se vissant à l'intérieur du coulisseau (6) assure la compression du joint busette (5)/plaque (4) et le serrage des plaques (3) et (4) l'une contre l'autre.
- le couvercle (7) renforcé par les deux longerons (9) pivotant selon l'articulation d'axe (18) est verrouillé au chassis (13) par deux vis (12).
- deux vis sans fin (8) ou deux crémaillères, attaquant la denture externe du coulisseau ; ces vis sans fin agissent de la manière suivante :
- a) La mise en rotation d'une seule de ces vis met le coulisseau en rotation/translation, comme s'il " roulait" sur la vis fixe.
- b) La mise en rotation simultanée des deux vis peut, selon leurs sens et leurs vitesses de rotation, entraîner le coulisseau dans une translation pure, une rotation pure, ou une rotation/translation.
- the seat brick (1) (in 1 or more parts), built into the pocket covering according to the usual methods.
- the internal nozzle (2) (in 1 or more parts), built into the seat brick using an appropriate mortar or grout.
- the frame of the closure (13), a machined metal part, very robust, which supports all of the elements and ensures the constancy of geometry of the assembly; it is securely attached to the pocket bottom plate (14).
- the fixed round plate (3), fixed in the chassis using a jaw or other device, avoiding any local mechanical stress; small pins can be provided to prevent any untimely rotation.
- the sliding and pivoting plate (4), fixed in the pivoting slide (20), by a device similar to that of the fixed plate.
- The pivoting slide (6), provided with external toothing (10), intended both for the application of the linear movement and for the rotation of the movable plate (4).
- the collector nozzle support (19), which by screwing inside the slide (6) ensures compression of the nozzle (5) / plate (4) seal and the tightening of the plates (3) and (4) l one against the other.
- The cover (7) reinforced by the two longitudinal members (9) pivoting along the axis articulation (18) is locked to the chassis (13) by two screws (12).
- two worms (8) or two racks, attacking the external teeth of the slide; these worms act as follows:
- a) The rotation of only one of these screws puts the slide in rotation / translation, as if it "rolled" on the fixed screw.
- b) The simultaneous rotation of the two screws can, according to their directions and their speeds of rotation, cause the slide in a pure translation, a pure rotation, or a rotation / translation.
Les vis sans fin peuvent être commandées par exemple par deux moteurs électriques commandés et réglés indépendamment.The worms can be controlled, for example, by two electric motors controlled and adjusted independently.
On peut obtenir les mêmes possibilités avec deux crémaillères commandées, par exemple, par deux vérins hydrauliques.The same possibilities can be obtained with two racks controlled, for example, by two hydraulic cylinders.
D'autres possibilités existent, fondées sur le même principe, et utilisant les techniques connues de l'homme de l'art.
- deux longerons (9) rigides, qui font partie intégrante du couvercle (7), compriment le coulisseau en translation et rotation contre la plaque fixe (3) par l'intermédiaire de billes (11) destinées à faciliter les mouvements de celui-ci ; ces billes circulent dans des rainures ménagées à cet effet dans les longerons.Other possibilities exist, based on the same principle, and using techniques known to those skilled in the art.
- two rigid longitudinal members (9), which are an integral part of the cover (7), compress the slide in translation and rotation against the fixed plate (3) by the intermediary of balls (11) intended to facilitate the movements thereof; these balls circulate in grooves made for this purpose in the side members.
Un refroidissement adéquat est prévu pour assurer un bon fonctionnement de l'ensemble.Adequate cooling is provided to ensure proper operation of the assembly.
De nombreuses autres variantes spécialement adaptées aux multiples nécessités de l'industrie découlent de la conception à symétrie axiale de révolution de la fermeture faisant l'objet de la présente invention.Many other variants specially adapted to the multiple needs of the industry arise from the design with axial symmetry of revolution of the closure which is the subject of the present invention.
Claims (21)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT89470007T ATE86158T1 (en) | 1988-05-13 | 1989-04-10 | CASTING CAP FOR LINEAR AND SYMMETRYAXIAL ADJUSTMENT. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR8806617 | 1988-05-13 | ||
FR8806617A FR2631266B1 (en) | 1988-05-13 | 1988-05-13 | CASTING SHUTTER WITH LINEAR DISPLACEMENT AND AXIAL SYMMETRY |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0346258A2 true EP0346258A2 (en) | 1989-12-13 |
EP0346258A3 EP0346258A3 (en) | 1990-01-31 |
EP0346258B1 EP0346258B1 (en) | 1993-03-03 |
Family
ID=9366385
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89470007A Revoked EP0346258B1 (en) | 1988-05-13 | 1989-04-10 | Casting gate for linear and symmetrie axial displacement |
Country Status (11)
Country | Link |
---|---|
US (1) | US5186845A (en) |
EP (1) | EP0346258B1 (en) |
JP (1) | JPH02504241A (en) |
KR (1) | KR970005413B1 (en) |
AT (1) | ATE86158T1 (en) |
BR (1) | BR8906963A (en) |
DE (1) | DE68905086T2 (en) |
ES (1) | ES2039923T3 (en) |
FR (1) | FR2631266B1 (en) |
WO (1) | WO1989010812A1 (en) |
ZA (1) | ZA893553B (en) |
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BE1008119A3 (en) * | 1994-03-21 | 1996-01-23 | Szadkowski Stanislav | Device with a slide sealing system for regulating the flow rate of ametallurgical container |
WO2006094846A1 (en) * | 2005-03-10 | 2006-09-14 | Tech-Gate S.A. | A linear sliding gate valve for a metallurgical vessel |
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US6168053B1 (en) * | 1999-06-21 | 2001-01-02 | Consarc Corporation | Positioning apparatus and method for precision pouring of a liquid from a vessel |
DE10324801A1 (en) * | 2003-06-02 | 2005-01-05 | Knöllinger FLO-TEC GmbH | Gießpfannenschieber |
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CA1126472A (en) * | 1978-06-19 | 1982-06-29 | Flo-Con Systems, Inc. | Rotary valve |
CH659872A5 (en) * | 1983-09-02 | 1987-02-27 | Stopinc Ag | LOCKING PLATE FOR A SLIDING LOCK. |
DE3423157C1 (en) * | 1984-06-22 | 1985-06-20 | Metacon AG, Zürich | Fireproof pair of plates for pivoting or rotating sliding closures |
JPS61159261A (en) * | 1984-12-28 | 1986-07-18 | Toshiba Ceramics Co Ltd | Molten metal discharging device |
JPS61159259A (en) * | 1984-12-28 | 1986-07-18 | Toshiba Ceramics Co Ltd | Molten metal discharging device |
CA1279189C (en) * | 1985-11-18 | 1991-01-22 | Tetsuya Yoshihara | Rotary nozzle system |
CH675976A5 (en) * | 1988-01-15 | 1990-11-30 | Stopinc Ag |
-
1988
- 1988-05-13 FR FR8806617A patent/FR2631266B1/en not_active Expired - Lifetime
-
1989
- 1989-04-10 ES ES198989470007T patent/ES2039923T3/en not_active Expired - Lifetime
- 1989-04-10 DE DE8989470007T patent/DE68905086T2/en not_active Expired - Fee Related
- 1989-04-10 WO PCT/FR1989/000163 patent/WO1989010812A1/en unknown
- 1989-04-10 BR BR898906963A patent/BR8906963A/en not_active IP Right Cessation
- 1989-04-10 JP JP1505287A patent/JPH02504241A/en active Pending
- 1989-04-10 AT AT89470007T patent/ATE86158T1/en not_active IP Right Cessation
- 1989-04-10 EP EP89470007A patent/EP0346258B1/en not_active Revoked
- 1989-04-10 US US07/465,093 patent/US5186845A/en not_active Expired - Fee Related
- 1989-04-10 KR KR1019900700062A patent/KR970005413B1/en active IP Right Grant
- 1989-05-13 ZA ZA893553A patent/ZA893553B/en unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2008729A (en) * | 1977-11-28 | 1979-06-06 | Shinagawa Refractories Co | Sector sliding plate brick having discharge ports and a slinding nozzle apparatus |
FR2420388A1 (en) * | 1978-03-21 | 1979-10-19 | Vesuvius Int Corp | SLIDING DOOR DEVICE FOR USE IN A COLOR SPEAKER |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5076476A (en) * | 1988-06-09 | 1991-12-31 | Societe Belge Des Produits Refractaires | Method for controlling a flow rate in a valve and a valve for the application of said method |
DE4231692C1 (en) * | 1992-09-22 | 1994-03-24 | Dolomitwerke Gmbh | Twist lock for metallurgical vessels |
BE1008119A3 (en) * | 1994-03-21 | 1996-01-23 | Szadkowski Stanislav | Device with a slide sealing system for regulating the flow rate of ametallurgical container |
WO2006094846A1 (en) * | 2005-03-10 | 2006-09-14 | Tech-Gate S.A. | A linear sliding gate valve for a metallurgical vessel |
EP1707291A1 (en) | 2005-03-10 | 2006-10-04 | Tech-Gate S.A. | A linear sliding gate valve for a metallurgical vessel |
EP1900459A2 (en) | 2005-03-10 | 2008-03-19 | Tech-Gate S.A. | A linear sliding gate valve for a metallurgical vessel |
EA010251B1 (en) * | 2005-03-10 | 2008-06-30 | Тех-Гате С.А. | A linear sliding gate for a metallurgical vessel |
US7648053B2 (en) | 2005-03-10 | 2010-01-19 | Tech-Gate S.A. | Linear sliding gate valve for a metallurgical vessel |
EA013176B1 (en) * | 2005-03-10 | 2010-02-26 | Тех-Гате С.А. | A linear sliding gate valve for a metallurgical vessel |
AU2006222134B2 (en) * | 2005-03-10 | 2010-05-20 | Tech-Gate S.A. | A linear sliding gate valve for a metallurgical vessel |
Also Published As
Publication number | Publication date |
---|---|
DE68905086D1 (en) | 1993-04-08 |
EP0346258B1 (en) | 1993-03-03 |
EP0346258A3 (en) | 1990-01-31 |
JPH02504241A (en) | 1990-12-06 |
WO1989010812A1 (en) | 1989-11-16 |
KR900701441A (en) | 1990-12-03 |
US5186845A (en) | 1993-02-16 |
FR2631266A1 (en) | 1989-11-17 |
BR8906963A (en) | 1990-12-11 |
ZA893553B (en) | 1990-01-31 |
ATE86158T1 (en) | 1993-03-15 |
KR970005413B1 (en) | 1997-04-16 |
ES2039923T3 (en) | 1993-10-01 |
FR2631266B1 (en) | 1990-09-14 |
DE68905086T2 (en) | 1993-08-05 |
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