EP0585254A1 - Ceinture d'etancheite d'un tube de coulee. - Google Patents
Ceinture d'etancheite d'un tube de coulee.Info
- Publication number
- EP0585254A1 EP0585254A1 EP92909213A EP92909213A EP0585254A1 EP 0585254 A1 EP0585254 A1 EP 0585254A1 EP 92909213 A EP92909213 A EP 92909213A EP 92909213 A EP92909213 A EP 92909213A EP 0585254 A1 EP0585254 A1 EP 0585254A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plate
- vacuum
- sealing belt
- inert gas
- groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
- B22D41/28—Plates therefor
-
- 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
- B22D41/42—Features relating to gas injection
Definitions
- the present invention relates to a sealing belt of the device for discharging a steel bottom pouring container and / or of the device for supplying and exchanging a pouring tube, comprising an upper plate or reference applied from below and a fixed base plate carrying the pouring tube.
- the invention finds wide application in the manufacture of refractory elements of a pouring tube changing device or a closing device with sliding plates for a metallurgical container from which the steel is discharged into a mold or an ingot mold.
- the mechanically entrained air during casting causes metal to rise or form exogenous blows.
- the oxidized metal nd to be stuck in the pouring tube and to give an oxide cell which, in the case of an ingot mold, can be the cause of skin defects.
- Document FR-A-2227073 describes a shutter device for sliding plates in which the underside of the reference plate which forms the sliding surface has a simple groove extending in U shape around the taphole.
- the groove is connected to a source of inert gas.
- the spacing of the ends of the branches of the U is greater than the diameter of the tap hole.
- This groove makes it possible to develop in the pores of the refractory materials which surround the taphole a gas pressure which opposes the ferrosratic pressure. that and prevents the steel from wetting the refractory materials.
- the main drawback of the simple groove is that the resulting security is insufficient.
- the preventive measure is only a single precaution. In addition, it does not allow any control or detection of a possible anomaly.
- the object of the present invention is to remedy these drawbacks by proposing a sealing belt intended to make airtight the closure of a steel bottom-pouring container or of a supply and exchange device.
- a pouring tube comprising at least one reference plate and a movable or fixed plate applied from below against the bottom of the container.
- the sealing belt provided around the taphole consists of two concentric grooves, formed in one or the other of the aforesaid plates and centered on the axis of the taphole, so as to delimit three distinct zones, namely a first annular inner zone surrounding the taphole, a second intermediate annular zone delimited by the two spokes ⁇ nures and a third outer zone between the outer groove and the periphery of the plate, the outer groove being connected to a vacuum source and the inner groove to a source of inert gas.
- Creating a vacuum in the outer groove has a double advantage. It makes it possible to prevent any infiltration of air into the enclosure between 'the two grooves and protects all the better the tap hole generally subjected to a vacuum by the VFNTUPI effect. It therefore ensures the absence of air in the pouring jet and thus prevents metal rising and the formation of blisters.
- the second advantage of creating a vacuum in the outer groove lies in the possibility of easily detecting the tightness of the sliding closure, using a pressure measurement probe.
- the measuring probe must of course be installed near the outer groove in the suction channel.
- the sealing belt is formed in a reference plate.
- the refractory plate in which the sealing belt is formed can also be a fixed plate carrying the tube.
- the refractory plate contains channels connecting the two aforementioned grooves, the outer groove to a source of vacuum and the inner groove to a source of inert gas.
- the outer groove of the refractory plate is connected to a device creating the vacuum and to a device for measuring the vacuum.
- FIG. 1 is a vertical section of a bottom casting device comprising a reference plate having a lower face in which is provided a sealing belt according to the invention and a strictly planar base plate integral with a pouring tube:
- Figure 2 shows in plan a top view of the basic refractory plate fixed to the pouring tube;
- Figure 3 shows in plan a bottom view of the underside of the reference pla ⁇ ue shown in Figure 1;
- FIG. 4 is a vertical section, similar to that shown in Figure 1, of a casting device comprising a reference plate and a base plate of a pouring tube having ' an upper face in which is provided a sealing belt according to the invention;
- Figure 5 is a plan view, top view, of the upper face of the base plate secured to the pouring tube shown in Figure 4;
- Figure 6 is a plan view, seen from below, of the underside of the upper refractory plate shown in Figure 4;
- FIG. 7 is a bottom view of the lower face of an upper plate of a device for regulating a steel vessel
- Figure 8 is a plan view from above of the upper face of a lower plate of the regulating device.
- FIG. 9 is a view in vertical section of the regulation device constituted by the superposition of the plates shown in FIGS. 7 and 8.
- a regulating device with sliding plates or a device for supplying and exchanging a pouring tube a device generally designated by the notation reference 1, consists of a base plate 2 secured to a refractory material pouring tube having a pouring hole 3 of determined diameter and provided with an upper plate 4 intended to be applied by a groove 5 against a lip of an internal nozzle not shown.
- the base plate 2 carries a pouring tube 6.
- the base plate 2 is reinforced by a steel sheath 7. It is pushed upwards by means of springs or jacks not shown, which apply it to the reference or upper plate 4 (top plate).
- the base plate 2 carrying the pouring tube 6 is capable of sliding along the upper plate 4 under the action of a displacement mechanism (preferably designed in the form of a pneumatic cylinder not shown) during the operation lead and exchange of a pouring tube.
- a sealing belt made up of two grooves is formed in the underside of the top plate 4, between the outer edge of the base plate and the tap hole.
- concentric annulars 8, 9 centered on the axis of the taphole 3, so as to delimit three distinct concentric annular zones, (see FIG. 3)
- the grooves 8 and 9 form airlocks isolated from each other and from the outside by the annular sealing zones 10, 11, 12 formed by the portions of surfaces in contact with the plates perfectly applied one against the attractor.
- a means of measuring the vacuum in the outer groove 8 makes it possible to directly report any abnormal loss of vacuum before any risk of aspiration of air into the tap hole.
- the outer groove 8 is connected to a vacuum source, constituted for example by a water pump not shown or by a vacuum pump, by a radial channel 13 formed in the upper plate. (see figure 1).
- This radial channel is also connected to a pressure measuring device, making it possible to monitor the vacuum prevailing in the external groove 8 and possibly to issue a signal in the event of the seal of the contact seal of the plates.
- the internal groove 9 is connected to a source of inert gas by a radial channel 14 formed in the top plate.
- the pressure of the inert gas in the interior groove 9 is maintained slightly higher than atmospheric pressure by injection of inert gas.
- any possible reduction in the pressure prevailing in the internal groove 9 is corrected by admitting fresh inert gas.
- This adjustment is carried out, for example, by an automatic valve coupled to a measuring device making it possible to determine the pressure in the above-mentioned internal groove 9.
- argon as an inert gas. Unlike nitrogen, which causes a certain nitriding of steel, argon protects the molten metal against any oxidation without causing a side effect capable of altering the quality of the metal.
- the double groove 8, 9 according to the invention is not subject to accidental plugging. It does not ris ⁇ ue to be soiled by residues of molten metal when the tube 6 is dragged to replace it with a new one since the metal flow is interrupted using a stopper rod during this operation.
- the sealing device according to the invention is easy to maintain, thanks to the fact that any residual metal is eliminated under the action of gravity during a possible removal of the base plate 2.
- FIG. 3 shows a top view of the upper face of the base plate 2 shown in FIG. 1.
- FIG. 4 shows in vertical section, similar to FIG. 1, but with the sealing belt shown in FIG. 5, that is to say formed in the upper surface of the base plate 2 of the tube. casting.
- suction 13 and injection 14 inert gas channels of the base plate 2 of the pouring tube are always drilled in the upper plate 4, as shown in FIGS. 1, 3, 4 and 6.
- the grooves 8 and 9 can be easily produced using a grinding wheel by removing material.
- Channels 13 and 14 which connect grooves 8 and 9 to sources of inert gas or vacuum can be made by drilling as shown in Figures 1, 3, 4 and 6 or be provided during the manufacture of refractory plates.
- a groove 5 for sealing the internal nozzle is formed in the upper face of the upper plate 4 (FIGS. 1 and 4) to be applied * in leaktight manner against a lip, not shown, one of the internal nozzle.
- the invention also applies to a sliding plate control device in which the underside of the reference plate 4 which forms the sliding surface has two rectangular oblong grooves 8, 9 or U-shaped, nested one inside the other so as to be substantially equidistant at all points (fig.l, 3).
- the choice of the shape and the length of the double groove 8, 9 is made according to the amplitude of the movement of the movable plate 2, this is limited to a maximum value by the length of the surrounded overlap zone by the groove through which the inert gas is injected, and to a minimum value by the internal diameter of the taphole 3 of the movable plate 2.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Sealing Material Composition (AREA)
- Pressure Vessels And Lids Thereof (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Continuous Casting (AREA)
- Insulating Bodies (AREA)
- Cable Accessories (AREA)
- Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE9100475A BE1004804A4 (fr) | 1991-05-21 | 1991-05-21 | Ceinture d'etancheite d'un tube de coulee. |
| BE9100475 | 1991-05-21 | ||
| PCT/BE1992/000016 WO1992020480A1 (fr) | 1991-05-21 | 1992-05-07 | Ceinture d'etancheite d'un tube de coulee |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0585254A1 true EP0585254A1 (fr) | 1994-03-09 |
| EP0585254B1 EP0585254B1 (fr) | 1995-01-25 |
Family
ID=3885511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92909213A Expired - Lifetime EP0585254B1 (fr) | 1991-05-21 | 1992-05-07 | Ceinture d'etancheite d'un tube de coulee |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US5390902A (fr) |
| EP (1) | EP0585254B1 (fr) |
| JP (1) | JPH06507349A (fr) |
| AT (1) | ATE117608T1 (fr) |
| BE (1) | BE1004804A4 (fr) |
| BR (1) | BR9206040A (fr) |
| DE (1) | DE69201305T2 (fr) |
| ES (1) | ES2069425T3 (fr) |
| WO (1) | WO1992020480A1 (fr) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1008438A3 (fr) * | 1994-06-23 | 1996-05-07 | Int Ind Eng Sa | Tube de coulee assemble a une plaque rapportee par une enveloppe metallique. |
| FR2745209B1 (fr) * | 1996-02-27 | 1998-05-15 | Fonderie Ctr Tech Ind | Dispositif de tiroir pour reservoir contenant un metal en fusion |
| FR2757431B1 (fr) * | 1996-12-20 | 1999-02-12 | Vesuvius France Sa | Installation de transfert de metal liquide, procede de mise en oeuvre, et refractaires |
| CZ295143B6 (cs) * | 1996-10-17 | 2005-05-18 | Vesuvius Crucible Company | Soustava žáruvzdorných prvků, žáruvzdorný prvek, zařízení na přemísťování tekutého kovu a způsob regulování přívodu inertního plynu u tohoto zařízení |
| BE1013024A3 (fr) * | 1998-12-15 | 2001-08-07 | Internat Ind Engineering S A | Tube de coulee. |
| EP1142660A1 (fr) * | 2000-03-07 | 2001-10-10 | Vesuvius Crucible Company | Pièce réfractaire rainurée pour coulée métallurgique, assemblage de pièces réfractaires et installation de coulée comportant un tel assemblage |
| EP1132163A1 (fr) * | 2000-03-07 | 2001-09-12 | Vesuvius Crucible Company | Plèce réfractaire rainurée pour coulée métallurgique, assemblage de pièces réfractaires, installation de coulée et procédé de restauration de la surface d'une pièce réfractaire |
| WO2002047853A1 (fr) * | 2000-12-12 | 2002-06-20 | Stopinc Aktiengesellschaft | Element resistant au feu destine a un changeur de tube de coulee sur le bec de coulee d'un recipient renfermant une masse metallique en fusion |
| EP2269751B1 (fr) * | 2009-07-01 | 2011-05-25 | Refractory Intellectual Property GmbH & Co. KG | Coulage de buse |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE449339A (fr) * | 1942-02-24 | |||
| GB1472532A (en) * | 1973-04-27 | 1977-05-04 | Didier Werke Ag | Sliding gate nozzles for metallurgical vessels |
| US4365731A (en) * | 1977-01-27 | 1982-12-28 | Didier-Werke, A.G. | Refractory structures |
| FR2490123A1 (fr) * | 1980-09-15 | 1982-03-19 | Air Liquide | Dispositif obturateur a plaques pour trous de coulee de recipient contenant un metal en fusion |
| BE891379A (fr) * | 1981-12-07 | 1982-06-07 | Vesuvius Internat Corp | Procede pour rendre etanche a l'air un dispositif d'obturation d'une poche de coulee et dispositif prevu a cet effet |
| DE3331483C2 (de) * | 1983-09-01 | 1985-09-26 | Metacon AG, Zürich | Einrichtung für feuerfeste Platten von Schieberverschlüssen |
| GB8521536D0 (en) * | 1985-08-29 | 1985-10-02 | British Steel Corp | Molten metal teeming practice |
| US5004131A (en) * | 1990-04-16 | 1991-04-02 | Bethlehem Steel Corporation | Molten metal slide gate valve |
| JPH04228256A (ja) * | 1990-08-10 | 1992-08-18 | Kurosaki Refract Co Ltd | ノズル孔の断気構造 |
-
1991
- 1991-05-21 BE BE9100475A patent/BE1004804A4/fr not_active IP Right Cessation
-
1992
- 1992-05-07 EP EP92909213A patent/EP0585254B1/fr not_active Expired - Lifetime
- 1992-05-07 AT AT92909213T patent/ATE117608T1/de not_active IP Right Cessation
- 1992-05-07 JP JP4508397A patent/JPH06507349A/ja active Pending
- 1992-05-07 US US08/142,288 patent/US5390902A/en not_active Expired - Fee Related
- 1992-05-07 WO PCT/BE1992/000016 patent/WO1992020480A1/fr not_active Ceased
- 1992-05-07 BR BR9206040A patent/BR9206040A/pt not_active IP Right Cessation
- 1992-05-07 ES ES92909213T patent/ES2069425T3/es not_active Expired - Fee Related
- 1992-05-07 DE DE69201305T patent/DE69201305T2/de not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9220480A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1992020480A1 (fr) | 1992-11-26 |
| US5390902A (en) | 1995-02-21 |
| BE1004804A4 (fr) | 1993-02-02 |
| JPH06507349A (ja) | 1994-08-25 |
| EP0585254B1 (fr) | 1995-01-25 |
| ES2069425T3 (es) | 1995-05-01 |
| DE69201305T2 (de) | 1995-06-01 |
| ATE117608T1 (de) | 1995-02-15 |
| DE69201305D1 (de) | 1995-03-09 |
| BR9206040A (pt) | 1995-11-14 |
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