CA2247294A1 - Sliding gate device for a vessel containing molten metal - Google Patents
Sliding gate device for a vessel containing molten metal Download PDFInfo
- Publication number
- CA2247294A1 CA2247294A1 CA 2247294 CA2247294A CA2247294A1 CA 2247294 A1 CA2247294 A1 CA 2247294A1 CA 2247294 CA2247294 CA 2247294 CA 2247294 A CA2247294 A CA 2247294A CA 2247294 A1 CA2247294 A1 CA 2247294A1
- Authority
- CA
- Canada
- Prior art keywords
- sliding gate
- housing
- displacement
- opposite
- gate device
- 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.)
- Abandoned
Links
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The invention relates to a sliding gate device for a vessel containing a molten metal. It comprises a stationary body (18, 20) defining an internal chamber (26) with an upstream wall and a downstream wall, each of said walls being provided with an opening, and said openings being opposite one another, as well as a sliding gate (28) movably mounted in said chamber and provided with at least one through-hole between its main surfaces. The sliding gate is guided by said chamber and a clearance is provided between the main sliding gate surfaces (28a, 28b) and the inner chamber wall. First and second means (40, 42) are provided for generating gas pressure in said chamber to provide a sealing gas flow between said sliding gate surfaces and the upstream and downstream chamber walls, whereby metal seepage is prevented. The first means (40) move the sliding gate in a first direction and the second means (42) move the sliding gate in the opposite direction.
Description
.
CA 02247294 1998-08-2~
SLIDING GATE DEVICE FOR A VESSEL CONTAINING MOLTEN METAL
The present invention relates to a sliding gate device for a vessel containing a molten metal.
More precisely, the invention concerns a shutter assembly incorporating a sliding gate, which is disposed on an upstream vessel used in metallurgy for allowing the liquid metal to flow towards a downstream vessel.
Refractory ladles used in metallurgy, and more parti-cularly in the iron and steel industry, for pouring molten metals in a downstream vessel constituted in particular by a continuous casting distributor, a mould or another ladle, are equipped in their lower part with sliding gate shutters which, when they are opened, allow the pouring operation. It goes without saying that, in the present Application, molten metal is most often understood to mean a metal alloy.
The refractory lining of the bottom of the ladle which contains the molten metal is pierced plumb with the sliding gate and is provided with a funnel in communication, via a spout, with the through-hole of a fixed plate made of refractory material. Beneath this fixed plate there slides a mobile plate or sliding gate, likewise made of refractory material and pierced with a through-hole. The metal is poured when the two through-holes are superposed.
A good quality seal must be provided between the fixed plate and the mobile plate forming the sliding gate, to ensure good working of this opening/closure device. In the known solutions, such seal is obtained by using plates whose work faces are perfectly smooth, generally precision-ground and strongly pressed against one another by return means. This involves the use o~ a heavy reinforcement and the necessity of applying a considerable effort to displace the mobile plate and to control opening of the sliding gate. The sliding gate is actuated by a mechanical member, most often of the jack type, which, by its dimensions, makes it impossible to use this system on small pouring ladles.
It will therefore be understood that there is a real need to have available a sliding gate device for pouring a liquid metal from a vessel which, while ensuring a very good seal between the mobile part and the fixed part of the sliding gate device, may be actuated by means not requiring the use of very high forces.
To that end, according to the invention, the sliding gate device for a vessel containing a molten metal, which comprises a fixed body defining an inner housing with an upstream wall and a downstream wall, each wall being provided with a through-hole, said through-holes being opposite each other and a mobile sliding gate mounted in said housing, said sliding gate presenting at least one through-hole between its principal faces, said sliding gate being guided in displacement by said housing between at least a first position in which the through-hole of the sliding gate is not opposite the through-holes of said body and at least a second position in which the through-hole of the sliding gate is opposite the through-holes of the body, a clearance existing between the principal faces of said sliding gate and the inner wall of the housing, is characterized in that it further comprises:
- first and second means, each creating a gas pressure in said housing in order to produce a gaseous flux providing seal between said faces of the sliding gate and the upstream and downstream wall of said housing;
- first means for displacing said sliding gate from one of said positions towards the other position; and - second means for displacing said sliding gate between the other position and said position.
It will be understood that, according to the invention, the seal between the sliding gate proper and the fixed body of .
the sliding gate is provided by a flux of gas under pressure produced by two sources of pressure so as to obtain a seal regularly distributed over all the opposite surfaces of the fixed and mobile parts of the sliding gate device. It will be understood that the seal is thus obtained without it being necessary to apply a considerable force between the fixed part and the mobile part. On the contrary, a clearance is provided betwen these two parts of the sliding gate device. This gas pressure must be sufficient to compensate for the static pres-sure of the metal contained in the upstream vessel.
At least one of the displacements of the sliding gate between its open position and its closed position or between its closed position and its open position, is preferably like-wise ensured by a gas under pressure.
According to a first embodiment of the invention, the movement opposite that which is provoked by the first flux of gas under pressure is likewise obtained by a second flux of gas under pressure. It will be understood that no mechanical member is thus necessary.
According to a second embodiment, the second movement of displacement of the sliding gate is obtained by controllable mechanical means. However, since the seal between the fixed part and the mobile part of the sliding gate device is obtained by a gaseous flux, it is understood that the force to be applied to displace the sliding gate is substantially reduced with respect to the prior art solutions.
According to a variant embodiment, the gaseous fluxes serve only to effect seal and the displacements of the sliding gate are produced by mechanical means.
It should also be added that the displacement of the sliding gate proper may be rectilinear but that this displacement may also be a movement of rotation about a fixed axis of the sliding gate.
Other characteristics and advantages of the invention will better appear from reading the following description of several embodiments of the invention given by way of non-limiting examples. The description refers:
Figure la is a view in section, in elevation, of a first embodiment of the sliding gate device with rectilinear dis-placement.
Figure lb is a view in section along line BB of Figure la.
Figure 2a is a view in section, in elevation, of a variant embodiment of the sliding gate device with rectilinear dis-placement.
Figure 2b is a view in section along line BB of Figure 2a.
Figure 3a is a view in section, in elevation, of a second variant embodiment of the sliding gate device with rectilinear displacement.
Figure 3b is a view in section along line BB of Figure 3a.
Figure 4a is a view in section, in elevation, of a sliding gate device with circular displacement, and Figure 4b is a view in section along line BB of Figure 4a.
Referring firstly to Figures la and lb, a first embodiment of the sliding gate device for a vessel containing molten metal will be descrlbed.
Figure la shows the bottom of the vessel 10 with its inner spout 12 in which the taphole 14 is made. The sliding gate device which is generally referenced 16 is mounted below the taphole 14 to allow opening and shutting thereof. The sliding gate device comprises a flxed body essentially constituted by a lower part 18 and by an upper part 20 connected together. The lower and upper parts 18 and 20 respectively are each provided with a vertical through-hole 22 and 24 which are themselves aligned with the taphole 14. The upper and lower parts 20 and 18 respectively define therebetween a housing 26 of generally rec-tangular parallelepipedic shape in which the shutting sliding gate 28 may be displaced. In this embodiment, the sliding gate 28 is equipped with a through-hole 30 so that, when the sliding gate is brought into its position shown in Figures la and lb, the through-hole 30 is opposite through-holes 22 and 24, allowing the ~low o~ the liquid metal; on theother hand, when the sliding gate 28 is moved away from this position, it shuts the through-holes 22 and 24. The body 18, 20 as well as the sliding gate 28 are pre~erably made o~ metal and partly o~ re~ractory material. The latter is adapted to resist the metal which traverses it, thermally and chemically. The re~ractory material may be alumina with nitrided binding agent doped with boron nitride and/or graphite, tabular alumina products with mullite binding agent, products based on sintered magnesia, products based on tabular alumina and heat-setting resins! products based on bauxite or chamotte.
The sliding gate 28, which is likewise generally substan-tially in the ~orm o~ a rectangular parallelepiped, is guided in translation by the cooperation o~ its longitudinal edges 32 and 34 with the longitudinal inner walls 36 and 38 o~ the inner housing 26. The sliding gate presents an upper ~ace 28a and a lower ~ace 28b opposite the principal upper and lower ~aces o~
the housing 26. To allow the displacement o~ the sliding gate in the housing 26, a calibrated clearance exists, o~ course, between the upper and lower faces o~ the sliding gate and the inner faces o~ the housing 26. This clearance is pre~erably included between 0.01 mm and 2 mm.
Two nozzles 40 and 42 respectively are provided at the ends o~ the housing 26, so that these nozzles open out in the housing 26 opposite the ends 28c and 28d o~ the sliding gate.
These nozzles 40 and 42 are connected to sources o~ pressurized gas via regulation valves such as 44 and 46. Valves 44 and 46 are controlled by a control circuit 48. This control circuit 48 makes it possible to regulate valves 44 and 46 and there~ore -the pressure of gas delivered by the nozzles 40 and 42. It will be understood that, depending on the value o~ the pressures p1 applied to the nozzle 42 and the pressure p2 applied to the nozzle 40, the displacement of the sliding gate 28 between its shutting position and its opening position, may be controlled.
It will likewise be understood that the jets of gas delivered via nozzles 40 and 42 create a gaseous flux, particularly in the clearances provided between the upper and lower faces and the inner bars of the housing. These gaseous fluxes thus pro-duce a seal between the sliding gate and the inner walls of thehousing. It should be emphasized that, due to the presence of 2 sources of antagonistic gaseous ~luxes, a very good distri-bution of the gaseous flux, and there~ore an e~icient seal, is obtained. It will therefore be understood that, in this first embodiment, the 2 gaseous fluxes perform the double function of constituting a sealing curtain between the sliding gate and the housing and of allowing the displacement in one direction and in the other of the sliding gate by adjusting the respective pressures p1 and p2, The value o~ these pressures is adapted as a ~unction o~ the metallostatic load exerted on the sliding gate. In addition, if the pressure is suf~icient, this gaseous flux may be used for the gaseous bubbling treatment in the upstream vessel.
Referring now to Figures 2a and 2b, a first variant embodiment of the sliding gate device will now be described.
This variant differs essentially ~rom that of Figures la and lb in that a mechanical stop 50 is provided, which projects in the lower face of the housing 26 in which the sliding gate 28 is displaced. This stop 50 is disposed so that, when the end 28d of the sliding gate is in contact with the stop 50, the sliding gate is in open position, i.e. its through-hole 30 is opposite through-holes 24 and 22 o~ the body of the sliding gate device.
This mechanical stop makes it possible to adjust this position of opening with precision. It allows rapid, reliable adjustment in a position of opening defined in advance.
In the case of the embodiment of Figures 3a and 3b, the stop 52 comprises an end 54 forming a cam which is disposed within the housing 26. Depending on the angular position of the cam 54, i.e. of the stop 52, a reference position is defined for the sliding gate. Depending on the position of the cam 54 in rotation, a total opening or a partial opening of the sliding gate may be controlled under the effect of the pressure applied by the nozzle 40. It will also be understood that the jet of gas on the sliding gate which brings its end 28d in contact with the cam 54, controls opening of the sliding gate.
Closure thereof may be obtained by the pressure P~ applied by the nozzle 42. It may also be obtained by the rotation of the cam 54, on condition that a stroke is provided therefor, sufficient to return the sliding gate 28 into closed position.
It will be understood that, even in the case of the return of the sliding gate to closed position being ensured by a mecha-nical member such as cam 54 or any other equivalent means, the nozzles 40 and 42 delivering gaseous flux ensure an efficient seal between the sliding gate and the inner walls of the housing 26, as has already been explained hereinabove.
In the foregoing description, the two gaseous fluxes created in the body of the sliding gate shutter serve firstly to produce seal between the sliding gate and the body of the shutter, then to provoke at least one of the two movements of displacement of the sliding gate. However, it goes without saying that the invention would not be exceeded if the gaseous fluxes served solely to produce the seal, the displacements of the sliding gate being obtained by mechanical means controlled manually or using a jack. It will be understood that, even in this embodiment, control of the displacements of the sliding gate is greatly facilitated thanks to the invention, since the .- CA 02247294 1998-08-2 efforts to be exerted are reduced due to the seal system employed.
In the embodiments described with reference to Figures l, 2 and 3, the displacement of the sliding gate, to pass it from a position of opening to a position of shutting, is a rectilinear displacement. In certain cases, it may be advantageous to provide a displacement of the sliding gate in a movement of rotation about its own axis.
This is illustrated in Figures 4a and 4b. In this case, the periphery 60a of the circular sliding gate 60 is preferably equipped with radial fins such as 62, these fins presenting a free edge 62a close to the inner cylindrical wall 64a of the housing 64 in which the rotary sliding gate is mounted. Accor-ding to the invention, two nozzles 66 and 68 are provided to create a gas pressure in the housing 64, these nozzles opening out in the housing at substantially diametrally opposite points with respect to the axis of rotation XX'. In addition, it is seen that these nozzles 66 and 68 open out with a slight incli-nation with respect to the wall of the housing 64. This gas pressure produced by the two nozzles makes it possible to control rotation of the sliding gate in the direction of arrow F. These jets of gas also make it possible to perform the function of seal between the mobile sliding gate and the walls of the housing.
In a first embodiment, the movement of rotation in the opposite direction may be obtained with the aid of an addi-tional nozzle 76 acting on the fins 62 in the opposite direc-tion of rotation. It is also possible to provide a braking finger 78 to stop the rotary sliding gate in its desired angular position. In this embodiment, it is possible to provide a plurality of through-holes 70, 72, 74 which, by rotation, may be successively brought opposite the through-holes 22 and 24 made in the body of the sliding gate device.
CA 02247294 1998-08-2~
SLIDING GATE DEVICE FOR A VESSEL CONTAINING MOLTEN METAL
The present invention relates to a sliding gate device for a vessel containing a molten metal.
More precisely, the invention concerns a shutter assembly incorporating a sliding gate, which is disposed on an upstream vessel used in metallurgy for allowing the liquid metal to flow towards a downstream vessel.
Refractory ladles used in metallurgy, and more parti-cularly in the iron and steel industry, for pouring molten metals in a downstream vessel constituted in particular by a continuous casting distributor, a mould or another ladle, are equipped in their lower part with sliding gate shutters which, when they are opened, allow the pouring operation. It goes without saying that, in the present Application, molten metal is most often understood to mean a metal alloy.
The refractory lining of the bottom of the ladle which contains the molten metal is pierced plumb with the sliding gate and is provided with a funnel in communication, via a spout, with the through-hole of a fixed plate made of refractory material. Beneath this fixed plate there slides a mobile plate or sliding gate, likewise made of refractory material and pierced with a through-hole. The metal is poured when the two through-holes are superposed.
A good quality seal must be provided between the fixed plate and the mobile plate forming the sliding gate, to ensure good working of this opening/closure device. In the known solutions, such seal is obtained by using plates whose work faces are perfectly smooth, generally precision-ground and strongly pressed against one another by return means. This involves the use o~ a heavy reinforcement and the necessity of applying a considerable effort to displace the mobile plate and to control opening of the sliding gate. The sliding gate is actuated by a mechanical member, most often of the jack type, which, by its dimensions, makes it impossible to use this system on small pouring ladles.
It will therefore be understood that there is a real need to have available a sliding gate device for pouring a liquid metal from a vessel which, while ensuring a very good seal between the mobile part and the fixed part of the sliding gate device, may be actuated by means not requiring the use of very high forces.
To that end, according to the invention, the sliding gate device for a vessel containing a molten metal, which comprises a fixed body defining an inner housing with an upstream wall and a downstream wall, each wall being provided with a through-hole, said through-holes being opposite each other and a mobile sliding gate mounted in said housing, said sliding gate presenting at least one through-hole between its principal faces, said sliding gate being guided in displacement by said housing between at least a first position in which the through-hole of the sliding gate is not opposite the through-holes of said body and at least a second position in which the through-hole of the sliding gate is opposite the through-holes of the body, a clearance existing between the principal faces of said sliding gate and the inner wall of the housing, is characterized in that it further comprises:
- first and second means, each creating a gas pressure in said housing in order to produce a gaseous flux providing seal between said faces of the sliding gate and the upstream and downstream wall of said housing;
- first means for displacing said sliding gate from one of said positions towards the other position; and - second means for displacing said sliding gate between the other position and said position.
It will be understood that, according to the invention, the seal between the sliding gate proper and the fixed body of .
the sliding gate is provided by a flux of gas under pressure produced by two sources of pressure so as to obtain a seal regularly distributed over all the opposite surfaces of the fixed and mobile parts of the sliding gate device. It will be understood that the seal is thus obtained without it being necessary to apply a considerable force between the fixed part and the mobile part. On the contrary, a clearance is provided betwen these two parts of the sliding gate device. This gas pressure must be sufficient to compensate for the static pres-sure of the metal contained in the upstream vessel.
At least one of the displacements of the sliding gate between its open position and its closed position or between its closed position and its open position, is preferably like-wise ensured by a gas under pressure.
According to a first embodiment of the invention, the movement opposite that which is provoked by the first flux of gas under pressure is likewise obtained by a second flux of gas under pressure. It will be understood that no mechanical member is thus necessary.
According to a second embodiment, the second movement of displacement of the sliding gate is obtained by controllable mechanical means. However, since the seal between the fixed part and the mobile part of the sliding gate device is obtained by a gaseous flux, it is understood that the force to be applied to displace the sliding gate is substantially reduced with respect to the prior art solutions.
According to a variant embodiment, the gaseous fluxes serve only to effect seal and the displacements of the sliding gate are produced by mechanical means.
It should also be added that the displacement of the sliding gate proper may be rectilinear but that this displacement may also be a movement of rotation about a fixed axis of the sliding gate.
Other characteristics and advantages of the invention will better appear from reading the following description of several embodiments of the invention given by way of non-limiting examples. The description refers:
Figure la is a view in section, in elevation, of a first embodiment of the sliding gate device with rectilinear dis-placement.
Figure lb is a view in section along line BB of Figure la.
Figure 2a is a view in section, in elevation, of a variant embodiment of the sliding gate device with rectilinear dis-placement.
Figure 2b is a view in section along line BB of Figure 2a.
Figure 3a is a view in section, in elevation, of a second variant embodiment of the sliding gate device with rectilinear displacement.
Figure 3b is a view in section along line BB of Figure 3a.
Figure 4a is a view in section, in elevation, of a sliding gate device with circular displacement, and Figure 4b is a view in section along line BB of Figure 4a.
Referring firstly to Figures la and lb, a first embodiment of the sliding gate device for a vessel containing molten metal will be descrlbed.
Figure la shows the bottom of the vessel 10 with its inner spout 12 in which the taphole 14 is made. The sliding gate device which is generally referenced 16 is mounted below the taphole 14 to allow opening and shutting thereof. The sliding gate device comprises a flxed body essentially constituted by a lower part 18 and by an upper part 20 connected together. The lower and upper parts 18 and 20 respectively are each provided with a vertical through-hole 22 and 24 which are themselves aligned with the taphole 14. The upper and lower parts 20 and 18 respectively define therebetween a housing 26 of generally rec-tangular parallelepipedic shape in which the shutting sliding gate 28 may be displaced. In this embodiment, the sliding gate 28 is equipped with a through-hole 30 so that, when the sliding gate is brought into its position shown in Figures la and lb, the through-hole 30 is opposite through-holes 22 and 24, allowing the ~low o~ the liquid metal; on theother hand, when the sliding gate 28 is moved away from this position, it shuts the through-holes 22 and 24. The body 18, 20 as well as the sliding gate 28 are pre~erably made o~ metal and partly o~ re~ractory material. The latter is adapted to resist the metal which traverses it, thermally and chemically. The re~ractory material may be alumina with nitrided binding agent doped with boron nitride and/or graphite, tabular alumina products with mullite binding agent, products based on sintered magnesia, products based on tabular alumina and heat-setting resins! products based on bauxite or chamotte.
The sliding gate 28, which is likewise generally substan-tially in the ~orm o~ a rectangular parallelepiped, is guided in translation by the cooperation o~ its longitudinal edges 32 and 34 with the longitudinal inner walls 36 and 38 o~ the inner housing 26. The sliding gate presents an upper ~ace 28a and a lower ~ace 28b opposite the principal upper and lower ~aces o~
the housing 26. To allow the displacement o~ the sliding gate in the housing 26, a calibrated clearance exists, o~ course, between the upper and lower faces o~ the sliding gate and the inner faces o~ the housing 26. This clearance is pre~erably included between 0.01 mm and 2 mm.
Two nozzles 40 and 42 respectively are provided at the ends o~ the housing 26, so that these nozzles open out in the housing 26 opposite the ends 28c and 28d o~ the sliding gate.
These nozzles 40 and 42 are connected to sources o~ pressurized gas via regulation valves such as 44 and 46. Valves 44 and 46 are controlled by a control circuit 48. This control circuit 48 makes it possible to regulate valves 44 and 46 and there~ore -the pressure of gas delivered by the nozzles 40 and 42. It will be understood that, depending on the value o~ the pressures p1 applied to the nozzle 42 and the pressure p2 applied to the nozzle 40, the displacement of the sliding gate 28 between its shutting position and its opening position, may be controlled.
It will likewise be understood that the jets of gas delivered via nozzles 40 and 42 create a gaseous flux, particularly in the clearances provided between the upper and lower faces and the inner bars of the housing. These gaseous fluxes thus pro-duce a seal between the sliding gate and the inner walls of thehousing. It should be emphasized that, due to the presence of 2 sources of antagonistic gaseous ~luxes, a very good distri-bution of the gaseous flux, and there~ore an e~icient seal, is obtained. It will therefore be understood that, in this first embodiment, the 2 gaseous fluxes perform the double function of constituting a sealing curtain between the sliding gate and the housing and of allowing the displacement in one direction and in the other of the sliding gate by adjusting the respective pressures p1 and p2, The value o~ these pressures is adapted as a ~unction o~ the metallostatic load exerted on the sliding gate. In addition, if the pressure is suf~icient, this gaseous flux may be used for the gaseous bubbling treatment in the upstream vessel.
Referring now to Figures 2a and 2b, a first variant embodiment of the sliding gate device will now be described.
This variant differs essentially ~rom that of Figures la and lb in that a mechanical stop 50 is provided, which projects in the lower face of the housing 26 in which the sliding gate 28 is displaced. This stop 50 is disposed so that, when the end 28d of the sliding gate is in contact with the stop 50, the sliding gate is in open position, i.e. its through-hole 30 is opposite through-holes 24 and 22 o~ the body of the sliding gate device.
This mechanical stop makes it possible to adjust this position of opening with precision. It allows rapid, reliable adjustment in a position of opening defined in advance.
In the case of the embodiment of Figures 3a and 3b, the stop 52 comprises an end 54 forming a cam which is disposed within the housing 26. Depending on the angular position of the cam 54, i.e. of the stop 52, a reference position is defined for the sliding gate. Depending on the position of the cam 54 in rotation, a total opening or a partial opening of the sliding gate may be controlled under the effect of the pressure applied by the nozzle 40. It will also be understood that the jet of gas on the sliding gate which brings its end 28d in contact with the cam 54, controls opening of the sliding gate.
Closure thereof may be obtained by the pressure P~ applied by the nozzle 42. It may also be obtained by the rotation of the cam 54, on condition that a stroke is provided therefor, sufficient to return the sliding gate 28 into closed position.
It will be understood that, even in the case of the return of the sliding gate to closed position being ensured by a mecha-nical member such as cam 54 or any other equivalent means, the nozzles 40 and 42 delivering gaseous flux ensure an efficient seal between the sliding gate and the inner walls of the housing 26, as has already been explained hereinabove.
In the foregoing description, the two gaseous fluxes created in the body of the sliding gate shutter serve firstly to produce seal between the sliding gate and the body of the shutter, then to provoke at least one of the two movements of displacement of the sliding gate. However, it goes without saying that the invention would not be exceeded if the gaseous fluxes served solely to produce the seal, the displacements of the sliding gate being obtained by mechanical means controlled manually or using a jack. It will be understood that, even in this embodiment, control of the displacements of the sliding gate is greatly facilitated thanks to the invention, since the .- CA 02247294 1998-08-2 efforts to be exerted are reduced due to the seal system employed.
In the embodiments described with reference to Figures l, 2 and 3, the displacement of the sliding gate, to pass it from a position of opening to a position of shutting, is a rectilinear displacement. In certain cases, it may be advantageous to provide a displacement of the sliding gate in a movement of rotation about its own axis.
This is illustrated in Figures 4a and 4b. In this case, the periphery 60a of the circular sliding gate 60 is preferably equipped with radial fins such as 62, these fins presenting a free edge 62a close to the inner cylindrical wall 64a of the housing 64 in which the rotary sliding gate is mounted. Accor-ding to the invention, two nozzles 66 and 68 are provided to create a gas pressure in the housing 64, these nozzles opening out in the housing at substantially diametrally opposite points with respect to the axis of rotation XX'. In addition, it is seen that these nozzles 66 and 68 open out with a slight incli-nation with respect to the wall of the housing 64. This gas pressure produced by the two nozzles makes it possible to control rotation of the sliding gate in the direction of arrow F. These jets of gas also make it possible to perform the function of seal between the mobile sliding gate and the walls of the housing.
In a first embodiment, the movement of rotation in the opposite direction may be obtained with the aid of an addi-tional nozzle 76 acting on the fins 62 in the opposite direc-tion of rotation. It is also possible to provide a braking finger 78 to stop the rotary sliding gate in its desired angular position. In this embodiment, it is possible to provide a plurality of through-holes 70, 72, 74 which, by rotation, may be successively brought opposite the through-holes 22 and 24 made in the body of the sliding gate device.
Claims (11)
1. Sliding gate device for a vessel containing a molten metal, comprising a fixed body (18, 20) defining an inner housing (26) with an upstream wall and a downstream wall, each wall being provided with a through-hole (22, 24), said through-holes being opposite each other and a mobile sliding gate (28, 60) mounted in said housing, said sliding gate presenting at least one through-hole (30) between its principal faces, said sliding gate being guided in displacement by said housing between at least a first position in which the through-hole of the sliding gate is not opposite the through-holes of said body and at least a second position in which the through-hole of the sliding gate is opposite the through-holes of the body, a clearance existing between the principal faces of said sliding gate and the inner wall of the housing, characterized in that it further comprises:
- first and second means (40, 42, 66, 68, 76), each creating a gas pressure in said housing in order to produce a gaseous flux providing seal between said faces of the sliding gate and the upstream and downstream wall of said housing, whereby any infiltration of metal is avoided;
- first means (40, 66) for displacing said sliding gate from one of said positions towards the other position; and - second means (42, 68, 76, 50, 52, 54) for displacing said sliding gate between the other position and said position.
- first and second means (40, 42, 66, 68, 76), each creating a gas pressure in said housing in order to produce a gaseous flux providing seal between said faces of the sliding gate and the upstream and downstream wall of said housing, whereby any infiltration of metal is avoided;
- first means (40, 66) for displacing said sliding gate from one of said positions towards the other position; and - second means (42, 68, 76, 50, 52, 54) for displacing said sliding gate between the other position and said position.
2. Sliding gate device according to Claim 1, characterized in that said first displacement means comprise first means (40) for applying a pressure to said sliding gate to provoke displacement thereof.
3. Sliding gate device according to Claim 2, characterized in that said second displacement means comprise second means (42, 68, 76) for applying a pressure to said sliding gate (28, 60) to provoke displacement thereof.
4. Sliding gate device according to Claim 3, characterized in that said first and second means (40, 42) for creating said gaseous flux for seal are merged with said first and second means for applying pressure to the sliding gate.
5. Sliding gate device according to Claim 2, characterized in that said sliding gate (28) has an elongated shape presenting a first (28c) and a second (28d) end and adapted to be displaced rectilinearly, and in that said first means (40) for applying a pressure comprise means forming nozzle, opening out in said housing opposite one of said ends of the sliding gate.
6. Sliding gate device according to Claim 5, characterized in that said second displacement means comprise second means (42, 68, 76) forming nozzle, opening out in said housing opposite the other end of said sliding gate.
7. Sliding gate device according to Claim 5, characterized in that said means forming nozzle (40, 42) are shaped to constitute, in addition, the first and second means for creating the gaseous flux for seal.
8. Sliding gate device according to any one of Claims 5 to 7, characterized in that one of the walls of said housing is provided with a stop (50) disposed so that, when one end (28d) of said sliding gate (28) is in contact with said stop, the through-hole (30) of the sliding gate is opposite the through-holes of the body.
9. Sliding gate device according to Claim 5, characterized in that said second displacement means comprise controllable mechanical displacement members (50, 52, 54, 78) adapted to act on one end (28d) of the sliding gate to provoke displacement of the sliding gate (28) between the two positions in a direction opposite that of the displacement provoked by the first means forming nozzle.
10. Sliding gate device according to Claim 1, characterized in that said first and second means for displacing said sliding gate (28) are mechanical.
11. Sliding gate device according to any one of Claims 1 to 10, characterized in that said sliding gate (60) is adapted to be displaced in rotation about a fixed axis.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9602382 | 1996-02-27 | ||
| FR9602382A FR2745209B1 (en) | 1996-02-27 | 1996-02-27 | DRAWER DEVICE FOR TANK CONTAINING FUSED METAL |
| PCT/FR1997/000339 WO1997031737A1 (en) | 1996-02-27 | 1997-02-26 | Sliding gate device for a vessel containing molten metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2247294A1 true CA2247294A1 (en) | 1997-09-04 |
Family
ID=29738041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2247294 Abandoned CA2247294A1 (en) | 1996-02-26 | 1997-02-26 | Sliding gate device for a vessel containing molten metal |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2247294A1 (en) |
-
1997
- 1997-02-26 CA CA 2247294 patent/CA2247294A1/en not_active Abandoned
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3651998A (en) | Nozzle for a pouring ladle | |
| US3511261A (en) | Controllable teeming valve for steel-casting ladles | |
| US3765579A (en) | Linearly movable gate mechanism | |
| US3352465A (en) | Refractory closure member for bottom pour vessels | |
| US3866806A (en) | Operating mechanism for slidable gates and method of operating slide gate | |
| US3567082A (en) | Casting installation | |
| US4003561A (en) | Pouring of metals | |
| GB1281012A (en) | Improvements relating to sliding closures for casting ladles or other vessels for the pouring of liquid metals | |
| CA2169716A1 (en) | Sliding gate valve for a vessel containing molten metal | |
| EP1029618B1 (en) | Slide plate for use in an apparatus for controlling amount of teeming molten metal | |
| US3918613A (en) | Sliding gate having selectively operable gas line for porous plug | |
| US6227421B1 (en) | Tundish equipped with a tube changer and plate for the tube changer | |
| US5954989A (en) | Erosion and abrasion resistant refractory composition and article made therefrom | |
| US4576317A (en) | Apparatus for preventing air from contacting molten metal during discharge through a sliding closure unit | |
| US5154875A (en) | Slide gate nozzle or shut-off control valve for metallurgical vessel and refractory shut-off parts thereof | |
| CA2247294A1 (en) | Sliding gate device for a vessel containing molten metal | |
| CA1340540C (en) | Refractory plate set of three-plate sliding gate valves | |
| US4260081A (en) | Slide-valve output regulating throttle | |
| CA2095484C (en) | Sliding nozzle for molten steel receiving vessel | |
| US5100034A (en) | Molten metal slide gate valve | |
| US3709411A (en) | Sliding gate closure assembly for bottom-pour teeming vessels | |
| JP2001501535A (en) | Sliding gate device for molten metal receiving container | |
| US5582391A (en) | Sliding gate valve | |
| US5695674A (en) | Casting flow control device | |
| USRE27237E (en) | Refractory closure member for bottom four vessels |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |