EP0825910B1 - Dispositif et procede de changement d'un tube de coulee continue de repartiteur d'acierie - Google Patents

Dispositif et procede de changement d'un tube de coulee continue de repartiteur d'acierie Download PDF

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Publication number
EP0825910B1
EP0825910B1 EP96913591A EP96913591A EP0825910B1 EP 0825910 B1 EP0825910 B1 EP 0825910B1 EP 96913591 A EP96913591 A EP 96913591A EP 96913591 A EP96913591 A EP 96913591A EP 0825910 B1 EP0825910 B1 EP 0825910B1
Authority
EP
European Patent Office
Prior art keywords
tube
plate
casting
new
worn
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96913591A
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German (de)
English (en)
French (fr)
Other versions
EP0825910A1 (fr
Inventor
Francois-No[L Richard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vesuvius France SA
Original Assignee
Vesuvius France SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vesuvius France SA filed Critical Vesuvius France SA
Publication of EP0825910A1 publication Critical patent/EP0825910A1/fr
Application granted granted Critical
Publication of EP0825910B1 publication Critical patent/EP0825910B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • B22D41/56—Means for supporting, manipulating or changing a pouring-nozzle

Definitions

  • the present invention relates to a device for changing a pouring tube continues according to the preamble of claim 1, which is based on EP-A-442515.
  • the steel In a continuous steel plant, the steel is poured from a ladle into a distributor, and distributor in one or more molds. To protect the steel from contact with air between the distributor and the mold, the steel is isolated from the atmosphere at by means of a submerged refractory tube fixed to the bottom of the distributor and whose end lower plunges into the mold.
  • This tube wears out and clogs quickly, especially in its lower part. This limits the duration of the pour.
  • devices have been designed which make it possible to replace a used tube with a new one.
  • the tube is provided with a plate at its upper part, this plate can be attached or formed in one piece with the tube. This plate can slide, while maintaining a sealed junction, on the underside of a fixed distributor plate.
  • the whole of the tube and the plate associated with it are simply called the tube.
  • a new tube is introduced into the mold, next to the used tube. Means are used to push the new tube into the casting position while the used tube is pushed back to the other side of the mold.
  • the lower end new tube must be immersed in the mold steel before the used tube is pushed to its evacuation position. In the same way the used tube remains submerged in the steel when it is in the evacuation position.
  • the mold has a sufficient width for three tubes can be placed side by side: the position of the new tube, the position of the tube which is sinking, and the position that the used tube will take after exchange. In many cases the mold does not have a sufficient width and other processes more unfavorable should be used.
  • the mold is very narrow.
  • the end of the tube In order to maintain a large passage section, the end of the tube must be very elongated in the direction of the large dimension of the mold. Consequently the plates provided at the upper end of the tube must themselves be very elongated.
  • these handling operations are generally carried out manually by a operator who carries and directs the tube by means of a clamp possibly associated with supports intended to facilitate operations.
  • these manual handling is relatively easy because there are several centimeters clearance between the tube and the edges of the mold and because the steel skin solidified on the walls of the mold is thick and robust and does not fear possible impact with the tube, due to manual handling.
  • the problem of handling becomes critical because the clearance between the tube and the mold walls is reduced a few millimeters and the skin solidified in this type of thin slab is weak thick and brittle. Contact of the tube with this skin would induce a significant risk of break the skin, which would cause a mold breakthrough and stop the casting. The manipulations must therefore be extremely precise if one does not want to strike the tube.
  • the present invention specifically relates to a tube changing device which overcomes these disadvantages.
  • the insertion position, the pouring position and the discharge position are arranged around a convex cylindrical surface having a horizontal axis perpendicular to the large dimension of the mold, this cylindrical surface constituting , the periphery of the fixed plate.
  • the tube plate has a concave cylindrical shape which adapts to the convex cylindrical surface of the fixed plate so as to maintain a tight seal between these surfaces when the new tube passes from the insertion position to the casting position and the passage of the used tube from the casting position to the discharge position by a rotational movement around the axis of the cylindrical surface.
  • the fixed plate is advantageously placed as low as possible below the mold so that the overall circle described by the tubes during their rotation is minimum.
  • the device can be used even when the width of the mold is less than three times the length of the end of a tube. Indeed, since the introduction of the new tube and the evacuation of the used tube is effected by a rotational movement, it suffices that the circle described by the end of the tube does not strike the edge of the mold. Even in a narrow mold, you can change the tube without having to lift the distributor. Optionally when the width of the mold is reduced it is possible to slightly raise the distributor so that the circle of dimensions of the tube escapes the edges of the mold while keeping the tube submerged in the casting position.
  • the tube plate can without any inconvenience be significantly smaller than the end of the tube. Indeed, the radius of the cylindrical surface is much less than the radius of the circle described by the end of the tube. It is therefore sufficient that the ratio of the length of the plate at the length of the end of the tube is in the same ratio as the radius from the cylindrical surface to the radius of the circle traversed by the end of the tube.
  • the new tube is entirely out of steel, and even usually out of the mold, when in its insertion position and the tube used is entirely out of steel, and even generally out of the mold when is in its evacuation position.
  • the tube is guided by the device change of tube itself.
  • This guidance is a rotation guidance given by the cylindrical surface of the fixed plate on which the concave surface of the plate slides of the tube.
  • the device also provides lateral guidance of the tube in the mold.
  • the invention also relates to a method for changing the distributor tube of continuous casting of steelworks to replace a used tube with a new one, in which a new tube is placed in a tube changing device, then pushed into the pouring position, while simultaneously the used tube is pushed from the pouring position to a discharge position.
  • the method is characterized in that the new tube is put into place in the tube change in a position outside the mold, bring the new tube in its casting position by rotation around a horizontal axis perpendicular to the large dimension of the mold, which has the effect of making a rotation of the used tube around this same axis, bringing the used tube into a evacuation position outside the mold in place, the center of rotation being located as low as possible.
  • This process makes it possible to change the tube if the mold has reduced width without having to stop casting.
  • the new tube is placed in the tube changing device in a substantially horizontal position, brings the new tube to its casting position by a rotation of approximately 90 ° around a horizontal axis, which has the effect of causing the user tube to rotate substantially 90 ° around this same axis, the used tube is extracted from the device tube change in a substantially horizontal position.
  • the actuating means comprise a rotor mounted rotating around from the horizontal axis of the cylindrical surface, this rotor comprising a pushing finger the new tube under the pressurizing means.
  • the finger moves back and forth to take a tube new
  • the device comprises first retaining means which make it possible to keep the new tube in its insertion position and second retaining means which keep the used tube in its evacuation position.
  • the guide means and the retaining means are designed so to allow the introduction of the new tube and the evacuation of the used tube in a direction perpendicular to the large dimension of the mold.
  • the means for pressurizing the plate transmit radial forces on the back of the plate.
  • edges of the plates are made so as to ensure a contiguous contact so as to leave no gap between two successive plates during the passage of the seal opposite the pouring orifice.
  • the cylindrical plate comprises locking means in rotation relative to the chassis.
  • the distributor designated by the general reference 2 has been shown only partially. It includes a steel bottom wall 4 covered with a layer of refractory 6. It contains liquid steel 8. The bottom of the distributor 2 is crossed by an internal nozzle 10 and which allows the passage of the liquid steel 8. The steel flow passing through the internal nozzle 10 can be controlled by a stopper rod 12 or optionally by a drawer device interposed between the bottom of the distributor and the tube change (device not shown).
  • a fixing plate or base plate 14 is fixed under the bottom plate 4 of the distributor.
  • the chassis 16 of the tube changing device according to the invention is fixed under the base plate 14.
  • a fixed plate 18 is mounted in the chassis 16. This fixed plate is presented as a cylinder of refractory material comprising at its upper part a socket 19 and which allows to receive the lower end of the internal nozzle 10.
  • the fixed plate is crossed by an orifice 20 which extends the channel of the internal nozzle 10.
  • the center of the fixed plate 18 has been designated by the letter O.
  • a tube designated by the general reference 22 is mounted at the bottom of the fixed plate 18.
  • the tube 22 has, at its upper part, a plate 24 of form concave which is applied tightly to the fixed plate 18.
  • Means for placing in pressure 36 are provided for applying the plate 24 of the tube 22 against the fixed plate 18.
  • the length of the lower end of the tube has been designated by the reference 26.
  • the casting mold 28 which has a large dimension designated by the reference 30 and generally called width and a small dimension 31.
  • the mold contains the liquid steel 8, still in the liquid state, and solidified only in contact with the walls of the mold which are cooled with water, to form a skin 32.
  • a second tube designated by the reference 22a
  • the tube 22a is a new tube intended to replace the tube 22.
  • the invention provides actuation means for passing the new tube 22a from its insertion position shown in Figure 1 to the casting position which is that of the tube 22 and to simultaneously pass the tube 22 from the position of pouring in the discharge position 22b.
  • actuating means consist of a cross bar 34 applied against the upper edge of the plate 24a of the new tube.
  • the bar 34 is linked to the rotor 48 likely to rotate on the same axis as the fixed plate.
  • Means of actuation also include a jack 37 mounted under the base plate 14 and which allows to activate the bar 34.
  • FIG. 2 shows the new tube 22a and the used tube 22 being changed. It can be seen that the lower end of the new tube 22a which was entirely outside the liquid steel 8 of the mold, and even entirely outside the mold 28 in its insertion position shown in FIG. 1, is not immersed in the steel only when the tube is placed in the casting position. In the insertion position 22a and in the discharge position 22b, the tube is applied without being pressed against the cylindrical surface 18. The pressurization takes place gradually when it passes from the insertion position 22a to the pouring position. . Also the pressure is gradually released when the tube passes from the casting position to the discharge position 22b.
  • the plate 24a of the new tube enters under rocker arms 36 having one end actuated by an elastic means such as for example springs and another end, visible in FIG.
  • the device for changing the tube of the invention like a device of the prior art, provides three positions, namely a position for introducing a new tube, a casting position and a position for discharging a used tube.
  • the tubes are arranged in this respective position they are not parallel to each other but arranged radially on the fixed plate 18.
  • the used tube 22 is already partially out of the mold when the new tube 22a enters it.
  • the avoidance circle 38 described by the point of the tubes 22, 22a, 22b furthest from the center O of the fixed plate 18 does not meet the angle 40 of the mold. casting 28.
  • the circle 38 would strike the angles 40 it would still be possible to slightly raise the distributor from a distance 42 (see FIG. 1) such that the tube 22 remains still immersed in the liquid steel 8 of the mold .
  • the center O of the fixed plate 18 is raised, and consequently the position of the avoidance circle 38.
  • FIG. 3 A view is shown in FIG. 3 in cross section of the tube changing device of the invention.
  • the cylindrical plate 18 is taken between two plates of insulating refractory material 44 which can be an integral part of the plate 18.
  • the plates 44 possibly have a metal casing on their outer face, or even on both.
  • a screw 46 or any other blocking means keeps the two plates 44 and the cylindrical plate 18 against the frame 16 in application.
  • a rotor 48 is mounted to rotate on cylindrical bearings 50 of the frame 16.
  • the rotor 48 consists of two flanges 52 interconnected by the crossbar 34 forming the pushing finger which actuates the new tube when it is put in place.
  • each flange 52 is provided with a rod 54 which passes through a bean-shaped light 56 pierced in the frame 16.
  • the two fingers 54 are connected to a drive fork 58 which is itself integral of the rod of the jack 37.
  • the jack 36 is double acting.
  • the two axes 54 describe an arc of a circle of approximately 90 ° around the axis XX of the cylindrical part 18. This is the reason why the jack 37 is articulated with respect to the base plate about an axis 60 so as to allow its angular movement.
  • the orifice 20 which passes through the cylindrical plate 18 can be cylindrical, as in the embodiment shown, but it can also have a section which widens. In this case the runner at the entrance to the tube 22 has a corresponding flared shape in order to maintain the continuity of the section of the runner.
  • means are provided for immobilizing the cylindrical plate in rotation. 18 relative to the frame 16. Indeed, it is subjected to rotational forces relatively large exerted by the friction forces of the plates 24 of the tubes during their rotation.
  • FIG. 3 makes it possible to observe an exemplary embodiment of the means of setting in pressure plates 24, tubes such as 22.
  • These means include rocker arms 36 articulated in their central part on ball screws 62 mounted in the frame 16. At their outer end the rocker arms 36 are pushed by springs 64. A their inner end, which may possibly have a concave shape which fits on the outer face of the plates 24, the rocker arms 36 exert an action radial directed towards the axis X-X of the cylindrical plate 18.
  • the puddles 52 of the rotor 48 advantageously have a diameter greater than that of the fixed plate 18 to serve as lateral guide to the tube.
  • One of the flanges 52 of the rotor 48 has two notches, namely a notch respectively of introduction of the new tube and a notch of evacuation of the used tube. These notches are intended to allow the introduction of the new tube and the extraction of the tube used by the face of the mold, that is to say in other words to allow to introduce it in the insertion position and to extract it from the evacuation position by moving it in a direction perpendicular to the large dimension 30 of the mold (see Figure 1). (parallel to the cylinder axis).
  • Retaining means are provided in order to keep the new tube 22a in its position of introduction. These means consist of a curved sheet 66 disposed on one side of the frame. On the other side of the frame there is only provided a lug placed in the position bottom of the tube to allow its introduction. Identical restraints are provided in the discharge area in order to keep the used tube in the position extraction.
  • this device is as follows.
  • you want to make a tube change the tube which is in the casting position being worn or clogged, we begins by introducing a new tube 22a in the insertion position, shown on the left in FIG. 1.
  • the actuating finger 34 is located at the part top of the fixed plate 18, near the internal nozzle 10.
  • the introduction of the new tube 22a can be made, as in the embodiment described, depending on the face front of the mold, allowing easy handling of the tube. But we can also consider, in an alternative embodiment, to introduce the new tube in another direction for example radial with respect to the fixed plate. It is then necessary to provide means of retainers adapted to this new direction.
  • the actuator 37 is actuated which exerts a tensile force on the fork 58, 54 from right to left, according to Figure 1 so as to drive the rotor 48 rotating counterclockwise.
  • the fork 58 distributes the force of the jack on the two axes 54 so that the forces are symmetrical.
  • the actuating finger 34 pushes the plate 24a of the new tube 22a.
  • This plate 24a is advantageously made contiguous with the plate of the used tube 22 so that there is no gap between them allowing the passage of steel liquid. It is possible to close the runner beforehand using the distaff 12. It is also possible, given the absence of a gap between the plates, to change the tube without closing the pouring channel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Handcart (AREA)
EP96913591A 1995-05-05 1996-04-15 Dispositif et procede de changement d'un tube de coulee continue de repartiteur d'acierie Expired - Lifetime EP0825910B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9505504A FR2733705B1 (fr) 1995-05-05 1995-05-05 Dispositif et procede de changement d'un tube de coulee continue de repartiteur d'acierie
FR9505504 1995-05-05
PCT/FR1996/000572 WO1996034713A1 (fr) 1995-05-05 1996-04-15 Dispositif et procede de changement d'un tube de coulee continue de repartiteur d'acierie

Publications (2)

Publication Number Publication Date
EP0825910A1 EP0825910A1 (fr) 1998-03-04
EP0825910B1 true EP0825910B1 (fr) 1999-06-30

Family

ID=9478818

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96913591A Expired - Lifetime EP0825910B1 (fr) 1995-05-05 1996-04-15 Dispositif et procede de changement d'un tube de coulee continue de repartiteur d'acierie

Country Status (17)

Country Link
US (1) US5984153A (ja)
EP (1) EP0825910B1 (ja)
JP (1) JP3734272B2 (ja)
KR (1) KR100371614B1 (ja)
CN (1) CN1072081C (ja)
AT (1) ATE181689T1 (ja)
AU (1) AU705969B2 (ja)
BR (1) BR9608325A (ja)
CA (1) CA2219951A1 (ja)
CZ (1) CZ292318B6 (ja)
DE (1) DE69603081T2 (ja)
ES (1) ES2135896T3 (ja)
FR (1) FR2733705B1 (ja)
PL (1) PL180635B1 (ja)
RU (1) RU2152846C2 (ja)
SK (1) SK283132B6 (ja)
WO (1) WO1996034713A1 (ja)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2745211B1 (fr) * 1996-02-22 1998-04-30 Vesuvius France Sa Repartiteur equipe d'un changeur de tube et plaque pour le changeur de tube
FR2754748B1 (fr) * 1996-10-23 1998-12-04 Vesuvius France Sa Piece de transfert et son procede de fabrication
US6969228B2 (en) * 2003-03-31 2005-11-29 Kimberly-Clark Worldwide, Inc. Palletizing system for storing and transporting materials
EP2301693A1 (fr) * 2009-06-29 2011-03-30 Vesuvius Group S.A Tube de protection de jet.
RU2511162C2 (ru) 2008-11-20 2014-04-10 Везувиус Груп С.А. Устройство перемещения кожуха для разливки жидкого металла и приводное устройство для регулятора потока жидкого металла
EP2269751B1 (en) * 2009-07-01 2011-05-25 Refractory Intellectual Property GmbH & Co. KG Pouring nozzle
EP2524748A1 (en) * 2011-05-16 2012-11-21 Vesuvius Group S.A Foolproof nozzle exchange device and nozzle unit
CN103658596A (zh) * 2013-11-30 2014-03-26 雄邦压铸（南通）有限公司 一种压铸液转运设备
CN107282902B (zh) * 2016-04-04 2018-12-04 鞍钢股份有限公司 一种浸入式水口的更换方法
CN107999736A (zh) * 2017-12-08 2018-05-08 攀枝花市朵实机械制造有限公司 一种钢包水口
CN110918954B (zh) * 2019-12-20 2020-09-08 迁西县立德机械制造有限公司 用于铸造加工的自动浇注机

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
DE1949995A1 (de) * 1969-10-03 1971-11-18 Didier Werke Ag Zwischenbehaelter (Tundish) fuer Stranggiessanlagen
BE758150A (fr) * 1969-10-30 1971-04-01 Schloemann Ag Dispositif comportant des tubes de coulee interchangeables pourune installation de coulee continue d'acier
US3907022A (en) * 1969-10-30 1975-09-23 Schloemann Siemag Ag Method of handling and replacing pouring tubes of a continuous casting apparatus
DE2027881B2 (de) * 1970-06-06 1979-12-13 Schloemann-Siemag Ag, 4000 Duesseldorf Vorrichtung zur Erneuerung der Stahlzuführung vom Zwischenbehälter zur Kokille einer Stranggießanlage
GB2053431B (en) * 1979-07-17 1983-08-10 Vesuvius Int Corp Supporting refractory plates of sliding
US4568007A (en) * 1984-01-23 1986-02-04 Vesuvius Crucible Company Refractory shroud for continuous casting
BE901564A (fr) * 1985-01-24 1985-07-24 Szadkowski Stanislav Dispositif d'amenee et d'echange d'un tube de coulee.
IT1238623B (it) * 1990-02-15 1993-08-18 Romano Cappelli Dispositivo per sostituire un condotto di protezione della colata continua di acciaio da un primo contenitore in un secondo contenitore
EP0453801B1 (de) * 1990-04-27 1995-02-01 Lonza Ag Vorrichtung zum Versprühen von dispersen Systemen
BE1007317A3 (fr) * 1993-07-27 1995-05-16 Int Ind Eng Sa Dispositif d'amenee et d'echange d'un tube de coulee dans une installation de coulee continue a brames minces.

Also Published As

Publication number Publication date
KR100371614B1 (ko) 2003-04-21
KR19990008311A (ko) 1999-01-25
US5984153A (en) 1999-11-16
RU2152846C2 (ru) 2000-07-20
CZ344397A3 (cs) 1998-08-12
EP0825910A1 (fr) 1998-03-04
MX9708487A (es) 1998-06-30
PL323131A1 (en) 1998-03-16
JPH11504862A (ja) 1999-05-11
CZ292318B6 (cs) 2003-09-17
AU705969B2 (en) 1999-06-03
FR2733705A1 (fr) 1996-11-08
AU5652696A (en) 1996-11-21
SK283132B6 (sk) 2003-03-04
JP3734272B2 (ja) 2006-01-11
BR9608325A (pt) 1999-02-23
CN1188437A (zh) 1998-07-22
DE69603081D1 (de) 1999-08-05
FR2733705B1 (fr) 1997-06-13
PL180635B1 (pl) 2001-03-30
ES2135896T3 (es) 1999-11-01
CA2219951A1 (en) 1996-11-07
SK148397A3 (en) 1998-10-07
DE69603081T2 (de) 1999-12-16
WO1996034713A1 (fr) 1996-11-07
CN1072081C (zh) 2001-10-03
ATE181689T1 (de) 1999-07-15

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