EP0836539B1 - Internal nozzle/plate assembly comprising a weakened portion - Google Patents

Internal nozzle/plate assembly comprising a weakened portion Download PDF

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Publication number
EP0836539B1
EP0836539B1 EP96924909A EP96924909A EP0836539B1 EP 0836539 B1 EP0836539 B1 EP 0836539B1 EP 96924909 A EP96924909 A EP 96924909A EP 96924909 A EP96924909 A EP 96924909A EP 0836539 B1 EP0836539 B1 EP 0836539B1
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EP
European Patent Office
Prior art keywords
plate
internal nozzle
central
area
nozzle assembly
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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
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EP96924909A
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German (de)
French (fr)
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EP0836539A1 (en
Inventor
François-Noel Richard
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Vesuvius France SA
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Vesuvius France SA
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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
    • B22D41/50—Pouring-nozzles
    • 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
    • B22D41/28—Plates therefor

Definitions

  • the invention relates to an internal plate-nozzle assembly for a distributor, said plate being intended to be applied against a support in which an orifice is provided (see: WO-A-92/05901).
  • a drawer shutter In the continuous casting of steel a shutter is frequently used for control the flow of steel between a distributor and one or more molds continuous casting.
  • a drawer shutter has at least one fixed refractory plate mounted under a support plate and at least one plate movable relative to the fixed plate. Each of these plates has at least one hole for the passage of steel.
  • the upper plate is associated with an internal nozzle which crosses the plate support and the bottom of the distributor.
  • the rod of solidified steel which forms inside the runner up to the movable plate has, at its lower end, the shape of an elephant's foot which anchors the wolf in the fixed plate of the drawer shutter.
  • each line leads to the formation of a wolf anchor in the dispatcher.
  • the internal nozzle must be or pushed inside the dispatcher with the wolf. This problem is made worse in the case where there are several casting lines. In fact, steel contracts by cooling, so that the solidified steel rods tend to approach the each other. As these rods are embedded in the wall of the distributor they enclose the part of the distributor which is between them.
  • the fixed plate and the internal nozzle are often assembled in an envelope metal which seals the nozzle when a neutral gas is injected into the runner and facilitates their handling during assembly.
  • This metal casing reinforces the assembly of the plate and the internal nozzle. It is very difficult to destroy the fixed plate and the internal nozzle when pushing the wolf inward of the distributor because it requires extruding the metal casing through the hole provided in the support on which the fixed plate is applied.
  • the present invention specifically relates to an internal plate / nozzle assembly which solves this problem.
  • the plate / nozzle assembly comprises a central zone located opposite the orifice of the support and a peripheral zone applied to the support, the central zone and the peripheral zone being connected by a zone of least resistance so that the central area can be separated from the peripheral area by applying little effort.
  • a metal envelope surrounds the area central and the peripheral zone, and the envelope comprises a weakened zone, in particular punched or notched.
  • the envelope is made up of two parts separated, namely a part partially surrounding the peripheral zone and a part partially surrounding the central area.
  • a metal envelope partially surrounds the internal nozzle, and a strapping band circles the plate.
  • the internal nozzle has an external wall cylindrical or slightly flared, this wall being surrounded by an envelope metallic.
  • the plate includes an insert located in the part center of the plate and whose outside diameter is smaller than the orifice provided in the support plate.
  • FIG. 1 a sectional view of a continuous casting distributor designated by the reference 2 under which a valve shutter 4 is mounted.
  • the distributor 2 consists of a steel wall 6 covered with a refractory lining 8.
  • a seat brick 10 is mounted in the covering 8 at the bottom of the distributor.
  • the shutter with drawer 4 has a frame 12 fixed under a support plate 13 mounted under the distributor.
  • Three refractory plates are mounted in the frame 12, namely an upper plate fixed 14, a movable plate 16, and a fixed lower plate 18.
  • An internal nozzle 20 is mounted with the fixed upper plate 14 in an envelope metal 22.
  • the internal nozzle 20, the plates 14, 16 and 18 have holes which form a flow channel which allows the passage of steel from the distributor to a continuous casting mold (not shown).
  • a continuous casting mold (not shown).
  • we close the drawer by shifting the movable plate 16 relative to the fixed plate 14 so as to interrupt the continuity of the channel of casting.
  • the liquid steel begins to cool and solidify, particularly in the channel of the internal nozzle 20 due to the low diameter of this channel.
  • a solidified steel rod is formed which anchors the wolf 24 in the distributor 2.
  • the lower end of the solidified steel rod 26 Due to the erosion of the internal nozzle 20 during casting the lower end of the solidified steel rod 26 has a flared shape 28 in shape of an elephant's foot which increases the grip of the wolf. This is why, when we turn the distributor 2 to extract the wolf, it does not fall but remains hung by the rod (s) 26. It is then necessary, after removing the drawer, which leaves the support plate and the internal plate / nozzle assembly on the distributor to exert a very great pressure on the steel rod 26 so as to break the fixed plate 14 and the internal nozzle 20 and to extrude the metal casing 22 through of the hole 30 provided in the support plate 13.
  • the object of the invention is to provide an internal plate / nozzle assembly which facilitates the unbundling operation.
  • the plate 14 / nozzle assembly internal 20 has a central zone located opposite the orifice 30 of the plate support 13 and a peripheral zone applied to the support plate 13.
  • the zone central and the peripheral zone are connected to each other by a zone of least resistance.
  • the envelope metal 22 has a circular cut 32 at the junction between the fixed plate 14 and internal nozzle 20.
  • This notch can be made in the part substantially vertical of the metal casing 22 as shown in FIG. 2, or on the horizontal part of this envelope, in the immediate vicinity of the connection of these two parts. Thanks to the presence of this notch the envelope metallic 22 tears easily when a relatively low force is applied to the steel rod 26.
  • the central part of the metal casing 22 enters the distributor.
  • the peripheral part remains outside on the fixed plate.
  • the plate 14 / internal nozzle 20 assembly is produced in two assembled parts, these two parts separate.
  • the refractory material breaks relatively easily. The presence of the notch 32 thus greatly facilitates the unbundling.
  • FIGS. 2a and 2b show two alternative embodiments of the notch 32.
  • the metal envelope 22 is notched on either side of its surface in the vertical part which surrounds the internal nozzle.
  • the envelope metal 22 is notched at the horizontal surface which surrounds the fixed plate 14.
  • FIG. 3 shows an alternative embodiment of the assemblies shown on Figures 1 and 2.
  • the metal casing 22 is stamped with level of the junction between its horizontal part and its substantially vertical part of so as to constitute a weakening 36.
  • FIG. 4 shows another embodiment of the invention.
  • the envelope metal 22 consists of a part 22a which surrounds the internal nozzle 20 and a part 22b which envelops the fixed plate 14. These two parts can separate without effort. To perform the splitting operation, simply separate the internal nozzle from plate 14 (together in two parts) or break the refractory material (together monobloc) which requires little effort.
  • Part 22b of the envelope metal 22 has a vertical rim 38. Part 22a of the metal casing is supported on the outside of this vertical rim 38 (FIG. 4a) or on the inside of the rim 38 ( Figure 4b).
  • FIG. 5 shows a third embodiment of the invention.
  • the metallic envelope consists of a single part 22c which surrounds only the internal nozzle 20.
  • the fixed plate 14 is not surrounded by a metal envelope, but simply by a strapping 40. Because the metal casing 22c and the strapping 40 are independent and separate, it is easy to pass the central area of the plate / internal nozzle assembly through the hole 30 provided in the plate 13, exactly in the same way as in the case of the embodiment of FIG. 4.
  • FIG. 6 shows a third embodiment of the invention.
  • Wall outside of the nozzle 20 is cylindrical so that the part of the envelope metal 22 which is applied against this outer wall is vertical and of section constant.
  • the fixed plate 14 has, in its central part, an insert 42.
  • the outside diameter of the insert 42 is smaller than the diameter of the hole 30 provided in the support plate 13. In this way the internal nozzle 20 and the insert 42 can be easily pushed inside the distributor by sliding on the casing metal 22.
  • the outer part of the fixed plate 14 and the metal casing 22 remain attached to the drawer shutter and the distributor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Closures For Containers (AREA)
  • Nozzles (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Cartons (AREA)
  • Tubes (AREA)
  • Paper (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)

Abstract

PCT No. PCT/FR96/01017 Sec. 371 Date Feb. 11, 1998 Sec. 102(e) Date Feb. 11, 1998 PCT Filed Jun. 28, 1996 PCT Pub. No. WO97/02104 PCT Pub. Date Jan. 23, 1997An internal nozzle/plate assembly for a distributor, wherein the plate is placed against a support (13) with an aperture (30) therein. A central portion is arranged opposite the aperture (30) and a peripheral portion is placed against the support (13). The central and peripheral portions are linked via a weakened portion (32) so that the central portion may be separated from the peripheral portion by exerting a slight force. A metal shell (22) partially surrounds said central and peripheral portions and the weakened portion (32) may be formed from a scored or notched portion in the shell.

Description

L'invention concerne un ensemble plaque - busette interne pour un répartiteur, ladite plaque étant destinée à être appliquée contre un support dans lequel est prévu un orifice (voir: WO-A-92/05901).The invention relates to an internal plate-nozzle assembly for a distributor, said plate being intended to be applied against a support in which an orifice is provided (see: WO-A-92/05901).

Dans la coulée en continu de l'acier on utilise fréquemment un obturateur à tiroir pour contrôler l'écoulement de l'acier entre un répartiteur et un ou plusieurs moules de coulée continue. Un obturateur à tiroir comporte au moins une plaque réfractaire fixe montée sous une plaque de support et au moins une plaque mobile par rapport à la plaque fixe. Chacune de ces plaques comporte au moins un trou pour le passage de l'acier. La plaque supérieure est associée à une busette interne qui traverse la plaque de support et le fond du répartiteur.In the continuous casting of steel a shutter is frequently used for control the flow of steel between a distributor and one or more molds continuous casting. A drawer shutter has at least one fixed refractory plate mounted under a support plate and at least one plate movable relative to the fixed plate. Each of these plates has at least one hole for the passage of steel. The upper plate is associated with an internal nozzle which crosses the plate support and the bottom of the distributor.

En fin de séquence de coulée on veut éviter que le laitier qui flotte à la surface de l'acier ne pénètre dans le moule. C'est pourquoi l'obturateur à tiroir est refermé alors qu'il reste encore une certaine quantité d'acier liquide, appelée le loup, dans le répartiteur. Ce loup refroidit et se solidifie.At the end of the casting sequence, we want to prevent the slag floating on the surface of steel does not enter the mold. This is why the shutter with drawer is closed then that there is still a certain amount of liquid steel, called the wolf, in the distributor. This wolf cools and solidifies.

En raison de l'évasement progressif par érosion du trou de la busette interne, la tige d'acier solidifié qui se forme à l'intérieur de chenal de coulée jusqu'à la plaque mobile présente, à son extrémité inférieure, la forme d'un pied d'éléphant qui ancre le loup dans la plaque fixe de l'obturateur à tiroir. Lorsque le répartiteur est équipé de plusieurs lignes de coulée chaque ligne conduit à la formation d'un ancrage du loup dans le répartiteur. Lorsque l'on retourne le répartiteur le (les) tige(s) d'acier doivent être cassées pour que l'on puisse désolidariser le loup du répartiteur. La busette interne doit être ou poussée à l'intérieur du répartiteur avec le loup. Ce problème est aggravé dans le cas où il y a plusieurs lignes de coulée. En effet l'acier se contracte en se refroidissant, de telle sorte que les tiges d'acier solidifiées tendent à se rapprocher les unes des autres. Comme ces tiges sont encastrées dans la paroi du répartiteur elles enserrent la partie du répartiteur qui se trouve entre elles.Due to the progressive flaring by erosion of the hole of the internal nozzle, the rod of solidified steel which forms inside the runner up to the movable plate has, at its lower end, the shape of an elephant's foot which anchors the wolf in the fixed plate of the drawer shutter. When the dispatcher is equipped with several casting lines each line leads to the formation of a wolf anchor in the dispatcher. When the distributor is turned over the steel rod (s) must be broken so that we can separate the wolf from the dispatcher. The internal nozzle must be or pushed inside the dispatcher with the wolf. This problem is made worse in the case where there are several casting lines. In fact, steel contracts by cooling, so that the solidified steel rods tend to approach the each other. As these rods are embedded in the wall of the distributor they enclose the part of the distributor which is between them.

De plus la plaque fixe et la busette interne sont souvent assemblées dans une enveloppe métallique qui assure l'étanchéité de la busette lorsqu'un gaz neutre est injecté dans le chenal de coulée et facilite leur manipulation pendant le montage. La présence de cette enveloppe métallique renforce l'assemblage de la plaque et de la busette interne. Il est très difficile de détruire la plaque fixe et la busette interne lorsque l'on pousse le loup vers l'intérieur du répartiteur parce que cela nécessite d'extruder l'enveloppe métallique au travers de l'orifice prévu dans le support sur lequel la plaque fixe est appliquée.In addition, the fixed plate and the internal nozzle are often assembled in an envelope metal which seals the nozzle when a neutral gas is injected into the runner and facilitates their handling during assembly. The presence of this metal casing reinforces the assembly of the plate and the internal nozzle. It is very difficult to destroy the fixed plate and the internal nozzle when pushing the wolf inward of the distributor because it requires extruding the metal casing through the hole provided in the support on which the fixed plate is applied.

La présente invention a précisément pour objet un ensemble plaque/busette interne qui résout ce problème.The present invention specifically relates to an internal plate / nozzle assembly which solves this problem.

Conformément à l'invention l'ensemble plaque/busette comprend une zone centrale située en regard de l'orifice du support et une zone périphérique appliquée sur le support, la zone centrale et la zone périphérique étant reliées par une zone de moindre résistance de manière que la zone centrale puisse être séparée de la zone périphérique par l'application d'un effort peu important.In accordance with the invention, the plate / nozzle assembly comprises a central zone located opposite the orifice of the support and a peripheral zone applied to the support, the central zone and the peripheral zone being connected by a zone of least resistance so that the central area can be separated from the peripheral area by applying little effort.

Selon un premier mode de réalisation, une enveloppe métallique entoure la zone centrale et la zone périphérique, et l'enveloppe comporte une zone affaiblie, notamment poinçonnée ou entaillée. En variante, l'enveloppe est constituée de deux parties séparées, à savoir une partie entourant partiellement la zone périphérique et une partie entourant partiellement la zone centrale.According to a first embodiment, a metal envelope surrounds the area central and the peripheral zone, and the envelope comprises a weakened zone, in particular punched or notched. Alternatively, the envelope is made up of two parts separated, namely a part partially surrounding the peripheral zone and a part partially surrounding the central area.

Selon un second mode de réalisation, une enveloppe métallique entoure partiellement la busette interne, et une bande de cerclage cercle la plaque.According to a second embodiment, a metal envelope partially surrounds the internal nozzle, and a strapping band circles the plate.

Dans une réalisation particulière, la busette interne comporte une paroi extérieure cylindrique ou légèrement évasée, cette paroi étant entourée par une enveloppe métallique. In a particular embodiment, the internal nozzle has an external wall cylindrical or slightly flared, this wall being surrounded by an envelope metallic.

Dans une autre réalisation particulière, la plaque comporte un insert situé dans la partie centrale de la plaque et dont le diamètre extérieur est plus petit que l'orifice prévu dans la plaque de support.In another particular embodiment, the plate includes an insert located in the part center of the plate and whose outside diameter is smaller than the orifice provided in the support plate.

D'autres caractéristiques et avantages de la présente invention apparaítront encore à la lecture de la description qui suit d'exemples de réalisation donnés à titre illustratif en référence aux figures annexées.Other characteristics and advantages of the present invention will become apparent from reading of the following description of illustrative examples given in reference to the appended figures.

Sur ces figures :

  • la figure 1 est une vue en coupe d'un tiroir de répartiteur dans lequel est monté un et,semble plaque fixe/busette interne ;
  • la figure 2 est une vue d'un ensemble plaque/busette interne conforme à l'invention ;
  • les figures 2a, 2b sont des vues de détail montrant des variantes de réalisation de l'ensemble représenté sur la figure 2 ;
  • la figure 3 est une vue d'une variante de réalisation des figures 1 et 2 ;
  • la figure 4 est une vue d'un autre mode de réalisation ;
  • les figures 4a et 4b sont des vues de détail qui montrent des variantes de réalisation de la figure 4 ;
  • la figure 5 est une vue en coupe d'un troisième mode de réalisation de l'invention ;
  • la figure 6 est une vue en coupe d'un quatrième mode de réalisation de l'invention.
In these figures:
  • Figure 1 is a sectional view of a distributor drawer in which is mounted one and, seems fixed plate / internal nozzle;
  • Figure 2 is a view of an internal plate / nozzle assembly according to the invention;
  • Figures 2a, 2b are detailed views showing alternative embodiments of the assembly shown in Figure 2;
  • Figure 3 is a view of an alternative embodiment of Figures 1 and 2;
  • Figure 4 is a view of another embodiment;
  • Figures 4a and 4b are detailed views which show alternative embodiments of Figure 4;
  • Figure 5 is a sectional view of a third embodiment of the invention;
  • Figure 6 is a sectional view of a fourth embodiment of the invention.

On a représenté sur la figure 1 une vue en coupe d'un répartiteur de coulée continue désigné par la référence 2 sous lequel est monté un obturateur à tiroir 4. Le répartiteur 2 est constitué d'une paroi d'acier 6 recouverte d'un revêtement réfractaire 8. Une brique de siège 10 est montée dans le revêtement 8 au fond du répartiteur. L'obturateur à tiroir 4 comporte un bâti 12 fixé sous une plaque support 13 montée sous le répartiteur. There is shown in Figure 1 a sectional view of a continuous casting distributor designated by the reference 2 under which a valve shutter 4 is mounted. The distributor 2 consists of a steel wall 6 covered with a refractory lining 8. A seat brick 10 is mounted in the covering 8 at the bottom of the distributor. The shutter with drawer 4 has a frame 12 fixed under a support plate 13 mounted under the distributor.

Trois plaques réfractaires sont montées dans le bâti 12, à savoir une plaque supérieure fixe 14, une plaque mobile 16, et une plaque inférieure fixe 18.Three refractory plates are mounted in the frame 12, namely an upper plate fixed 14, a movable plate 16, and a fixed lower plate 18.

Une busette interne 20 est montée avec la plaque supérieure fixe 14 dans une enveloppe métallique 22. La busette interne 20, les plaques 14, 16 et 18 comportent des trous qui forment un chenal de coulée qui permet le passage de l'acier du répartiteur vers un moule de coulée continue (non représenté). A la fin d'une séquence de coulée on ne souhaite pas que le laitier qui flotte à la surface de l'acier 24 contenu dans le répartiteur passe dans le moule. Pour cette raison on ferme le tiroir en décalant la plaque mobile 16 par rapport à la plaque fixe 14 de manière à interrompre la continuité du chenal de coulée. Dès que cette opération a été réalisée l'acier liquide commence à refroidir et à se solidifier, particulièrement dans le chenal de la busette interne 20 en raison du faible diamètre de ce chenal. Il se forme une tige d'acier solidifié qui ancre le loup 24 dans le répartiteur 2. En raison de l'érosion de la busette interne 20 durant la coulée l'extrémité inférieure de la tige d'acier solidifié 26 présente une forme évasée 28 en forme de patte d'éléphant qui augmente l'accrochage du loup. C'est pourquoi, lorsque l'on retourne le répartiteur 2 pour en extraire le loup, celui-ci ne tombe pas mais reste accroché par la (les) tige(s) 26. Il est alors nécessaire, après avoir retiré le tiroir, qui laisse sur le répartiteur la plaque de support et l'ensemble plaque/busette interne d'exercer une très importante pression sur la tige d'acier 26 de manière à briser la plaque fixe 14 et la busette interne 20 et à extruder l'enveloppe métallique 22 au travers du trou 30 prévu dans la plaque support 13.An internal nozzle 20 is mounted with the fixed upper plate 14 in an envelope metal 22. The internal nozzle 20, the plates 14, 16 and 18 have holes which form a flow channel which allows the passage of steel from the distributor to a continuous casting mold (not shown). At the end of a casting sequence we do not not want the slag floating on the surface of the steel 24 contained in the distributor goes into the mold. For this reason we close the drawer by shifting the movable plate 16 relative to the fixed plate 14 so as to interrupt the continuity of the channel of casting. As soon as this operation has been carried out the liquid steel begins to cool and solidify, particularly in the channel of the internal nozzle 20 due to the low diameter of this channel. A solidified steel rod is formed which anchors the wolf 24 in the distributor 2. Due to the erosion of the internal nozzle 20 during casting the lower end of the solidified steel rod 26 has a flared shape 28 in shape of an elephant's foot which increases the grip of the wolf. This is why, when we turn the distributor 2 to extract the wolf, it does not fall but remains hung by the rod (s) 26. It is then necessary, after removing the drawer, which leaves the support plate and the internal plate / nozzle assembly on the distributor to exert a very great pressure on the steel rod 26 so as to break the fixed plate 14 and the internal nozzle 20 and to extrude the metal casing 22 through of the hole 30 provided in the support plate 13.

L'objet de l'invention est de proposer un ensemble plaque/busette interne qui facilite l'opération de déloupage. Conformément à l'invention l'ensemble plaque 14/busette interne 20 présente une zone centrale située en regard de l'orifice 30 de la plaque support 13 et une zone périphérique appliquée sur la plaque support 13. La zone centrale et la zone périphérique sont reliées entre elles par une zone de moindre résistance. Dans l'exemple de réalisation représenté sur la figure 2 l'enveloppe métallique 22 comporte une entaille circulaire 32 au niveau de la jonction entre la plaque fixe 14 et de la busette interne 20. Cette entaille peut être réalisée dans la partie sensiblement verticale de l'enveloppe métallique 22 comme représenté sur la figure 2, ou encore sur la partie horizontale de cette enveloppe, au voisinage immédiat du raccordement de ces deux parties. Grâce à la présence de cette entaille l'enveloppe métallique 22 se déchire aisément lorsque l'on applique un effort relativement faible sur la tige d'acier 26. La partie centrale de l'enveloppe métallique 22 pénètre dans le répartiteur. La partie périphérique reste à l'extérieur sur la plaque fixe.The object of the invention is to provide an internal plate / nozzle assembly which facilitates the unbundling operation. In accordance with the invention, the plate 14 / nozzle assembly internal 20 has a central zone located opposite the orifice 30 of the plate support 13 and a peripheral zone applied to the support plate 13. The zone central and the peripheral zone are connected to each other by a zone of least resistance. In the embodiment shown in Figure 2 the envelope metal 22 has a circular cut 32 at the junction between the fixed plate 14 and internal nozzle 20. This notch can be made in the part substantially vertical of the metal casing 22 as shown in FIG. 2, or on the horizontal part of this envelope, in the immediate vicinity of the connection of these two parts. Thanks to the presence of this notch the envelope metallic 22 tears easily when a relatively low force is applied to the steel rod 26. The central part of the metal casing 22 enters the distributor. The peripheral part remains outside on the fixed plate.

Si l'ensemble plaque 14/busette interne 20 est réalisé en deux parties assemblées, ces deux parties se séparent. Dans le cas où la plaque 14 et busette interne 20 sont réalisées en un ensemble d'une seule pièce (ensemble monobloc) le matériau réfractaire se casse de manière relativement aisée. La présence de l'entaille 32 facilite ainsi grandement le déloupage.If the plate 14 / internal nozzle 20 assembly is produced in two assembled parts, these two parts separate. In the case where the plate 14 and internal nozzle 20 are produced in a single piece assembly (one-piece assembly) the refractory material breaks relatively easily. The presence of the notch 32 thus greatly facilitates the unbundling.

On a représenté sur les figures 2a et 2b deux variantes de réalisation de l'entaille 32. Sur la figure 2a l'enveloppe métallique 22 est entaillée de part et d'autre de sa surface dans la partie verticale qui entoure la busette interne. Sur la figure 2b l'enveloppe métallique 22 est entaillée au niveau de la surface horizontale qui entoure la plaque fixe 14.FIGS. 2a and 2b show two alternative embodiments of the notch 32. In FIG. 2a the metal envelope 22 is notched on either side of its surface in the vertical part which surrounds the internal nozzle. In Figure 2b the envelope metal 22 is notched at the horizontal surface which surrounds the fixed plate 14.

On a représenté sur la figure 3 une variante de réalisation des ensembles représentés sur les figures 1 et 2. Dans cette variante l'enveloppe métallique 22 est poinçonnée au niveau de la jonction entre sa partie horizontale et sa partie sensiblement verticale de manière à constituer un affaiblissement 36.FIG. 3 shows an alternative embodiment of the assemblies shown on Figures 1 and 2. In this variant the metal casing 22 is stamped with level of the junction between its horizontal part and its substantially vertical part of so as to constitute a weakening 36.

On a représenté sur la figure 4 un autre mode de réalisation de l'invention. L'enveloppe métallique 22 est constituée d'une partie 22a qui entoure la busette interne 20 et d'une partie 22b qui enveloppe la plaque fixe 14. Ces deux parties peuvent se séparer sans effort. Pour effectuer l'opération de déloupage il suffit de séparer la busette interne de la plaque 14 (ensemble en deux parties) ou de briser le matériau réfractaire (ensemble monobloc) ce qui demande un effort peu important. On a représenté sur les figures 4a et 4b deux variantes de réalisation du mode de la figure 4. La partie 22b de l'enveloppe métallique 22 comporte un rebord vertical 38. La partie 22a de l'enveloppe métallique est appuyée sur l'extérieur de ce rebord vertical 38 (figure 4a) ou sur l'intérieur du rebord 38 (figure 4b).FIG. 4 shows another embodiment of the invention. The envelope metal 22 consists of a part 22a which surrounds the internal nozzle 20 and a part 22b which envelops the fixed plate 14. These two parts can separate without effort. To perform the splitting operation, simply separate the internal nozzle from plate 14 (together in two parts) or break the refractory material (together monobloc) which requires little effort. There is shown in Figures 4a and 4b two alternative embodiments of the mode of FIG. 4. Part 22b of the envelope metal 22 has a vertical rim 38. Part 22a of the metal casing is supported on the outside of this vertical rim 38 (FIG. 4a) or on the inside of the rim 38 (Figure 4b).

On a représenté sur la figure 5 un troisième mode de réalisation de l'invention. L'enveloppe métallique est constituée d'une partie unique 22c qui entoure seulement la busette interne 20. La plaque fixe 14 n'est pas entourée par une enveloppe métallique, mais simplement par un cerclage 40. Du fait que l'enveloppe métallique 22c et le cerclage 40 sont indépendants et séparés, il est facile de faire passer la zone centrale de l'ensemble plaque/busette interne au travers du trou 30 prévu dans la plaque 13, exactement de la même manière que dans le cas du mode de réalisation de la figure 4.FIG. 5 shows a third embodiment of the invention. The metallic envelope consists of a single part 22c which surrounds only the internal nozzle 20. The fixed plate 14 is not surrounded by a metal envelope, but simply by a strapping 40. Because the metal casing 22c and the strapping 40 are independent and separate, it is easy to pass the central area of the plate / internal nozzle assembly through the hole 30 provided in the plate 13, exactly in the same way as in the case of the embodiment of FIG. 4.

On a représenté sur la figure 6 un troisième mode de réalisation de l'invention. La paroi extérieur de la busette 20 est cylindrique de telle sorte que la partie de l'enveloppe métallique 22 qui est appliquée contre cette paroi extérieure est verticale et de section constante. De plus la plaque fixe 14 comporte, dans sa partie centrale, un insert 42. Le diamètre extérieur de l'insert 42 est plus petit que le diamètre du trou 30 prévu dans la plaque de support 13. De cette manière la busette interne 20 et l'insert 42 peuvent être poussés facilement vers l'intérieur du répartiteur en glissant sur l'enveloppe métallique 22. La partie extérieure de la plaque fixe 14 et l'enveloppe métallique 22 restent solidaires de l'obturateur à tiroir et du répartiteur.FIG. 6 shows a third embodiment of the invention. Wall outside of the nozzle 20 is cylindrical so that the part of the envelope metal 22 which is applied against this outer wall is vertical and of section constant. In addition, the fixed plate 14 has, in its central part, an insert 42. The outside diameter of the insert 42 is smaller than the diameter of the hole 30 provided in the support plate 13. In this way the internal nozzle 20 and the insert 42 can be easily pushed inside the distributor by sliding on the casing metal 22. The outer part of the fixed plate 14 and the metal casing 22 remain attached to the drawer shutter and the distributor.

Claims (6)

  1. Plate/internal nozzle assembly for a tundish, said plate (14) being designed to be applied against a support (13) in which there is an orifice (30), characterised in that it comprises a central area facing the orifice (30) and a peripheral area applied against the support (13), the central area and the peripheral area being connected through an area of least resistance (32) such that the central area can be separated from the peripheral area by applying a limited force.
  2. Plate/internal nozzle assembly according to claim 1, whereby a metal casing partially surrounds the central area and the peripheral area, characterised in that the casing (22) includes a weak area (32), particularly stamped or notched.
  3. Plate/internal nozzle assembly according to claim 1, whereby a metal casing partially surrounds the central area and the peripheral area, characterised in that said casing (22) is composed of two separates parts, namely one part (22b) partially surrounding the peripheral area, and a part (22a) partially surrounding the central area.
  4. Plate/internal nozzle assembly according to claim 1, characterised in that it includes a metal casing (22c) partially surrounding the internal nozzle (20) and a hoop (40) that encircles the plate (14).
  5. Plate/internal nozzle assembly according to anyone of claims 1 to 4, characterised in that the internal nozzle (20) includes an external cylindrical or slightly tapered wall, this wall being surrounded by a metal casing (22).
  6. Plate/internal nozzle assembly according to anyone of claims 1 to 5, characterised in that the plate (14) includes an insert (42) located in the central part of the plate (14), and the outside diameter of which is smaller than the orifice (30) provided in the support plate (13).
EP96924909A 1995-07-03 1996-06-28 Internal nozzle/plate assembly comprising a weakened portion Expired - Lifetime EP0836539B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9508088 1995-07-03
FR9508088A FR2736289B1 (en) 1995-07-03 1995-07-03 INTERNAL NOZZLE PLATE ASSEMBLY HAVING LOWER RESISTANCE AREA
PCT/FR1996/001017 WO1997002104A1 (en) 1995-07-03 1996-06-28 Internal nozzle/plate assembly comprising a weakened portion

Publications (2)

Publication Number Publication Date
EP0836539A1 EP0836539A1 (en) 1998-04-22
EP0836539B1 true EP0836539B1 (en) 1999-08-25

Family

ID=9480690

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96924909A Expired - Lifetime EP0836539B1 (en) 1995-07-03 1996-06-28 Internal nozzle/plate assembly comprising a weakened portion

Country Status (12)

Country Link
US (1) US6082599A (en)
EP (1) EP0836539B1 (en)
KR (1) KR100427608B1 (en)
CN (1) CN1072080C (en)
AT (1) ATE183680T1 (en)
AU (1) AU6521096A (en)
DE (1) DE69603964T2 (en)
ES (1) ES2138361T3 (en)
FR (1) FR2736289B1 (en)
TW (1) TW298570B (en)
WO (1) WO1997002104A1 (en)
ZA (1) ZA965600B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4159075B2 (en) * 2001-05-23 2008-10-01 黒崎播磨株式会社 Sliding gate plate
EP2269751B1 (en) 2009-07-01 2011-05-25 Refractory Intellectual Property GmbH & Co. KG Pouring nozzle
CN114042903A (en) * 2021-11-18 2022-02-15 一重集团大连工程技术有限公司 Three slide plate sliding gate

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1938117C2 (en) * 1969-07-26 1975-12-18 Didier Werke Ag Container with slide lock for liquid melt
DE2548854A1 (en) * 1975-10-31 1977-05-05 Metacon Ag Refractory brick with a passage opening for liquid metal and the process for its production
DE3304938C1 (en) * 1983-02-12 1984-05-03 Didier-Werke Ag, 6200 Wiesbaden Method for applying a metallic tensioning strap to the peripheral surface of a closure plate for a sliding closure
DE3512907C2 (en) * 1985-04-11 1991-01-03 Stopinc Ag, Baar Pouring sleeve for a container containing molten metal
JP2667830B2 (en) * 1987-09-07 1997-10-27 株式会社クラレ Ethylene-vinyl alcohol copolymer composition
FR2643001A1 (en) * 1989-01-05 1990-08-17 Vesuvius Sa Casting member including a plane sliding surface for an associated slide plate (drawback)
US5044533A (en) * 1990-10-01 1991-09-03 Flo-Con Systems, Inc. Clamp for bandless refractory and method
US5188743A (en) * 1989-03-03 1993-02-23 Flo-Con Systems, Inc. Plate, changer, plate and method
FI91371C (en) * 1992-09-04 1994-06-27 Indref Oy Casting nozzle and methods for its manufacture and renewal
US5431374A (en) * 1993-10-29 1995-07-11 Vesuvius Crucible Company Nozzle and base plate apparatus and method for use in a tundish slide gate valve

Also Published As

Publication number Publication date
KR100427608B1 (en) 2004-09-08
ZA965600B (en) 1997-01-27
WO1997002104A1 (en) 1997-01-23
ATE183680T1 (en) 1999-09-15
FR2736289B1 (en) 1997-08-29
FR2736289A1 (en) 1997-01-10
AU6521096A (en) 1997-02-05
CN1072080C (en) 2001-10-03
US6082599A (en) 2000-07-04
KR19990023024A (en) 1999-03-25
ES2138361T3 (en) 2000-01-01
EP0836539A1 (en) 1998-04-22
TW298570B (en) 1997-02-21
CN1189791A (en) 1998-08-05
MX9710455A (en) 1998-03-31
DE69603964D1 (en) 1999-09-30
DE69603964T2 (en) 1999-12-09

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