SIGHT VALVE PLATE

Abstract

The present invention relates to a bezel valve plate for a gate valve for molten metal, comprising: an upper surface; a lower surface, said upper and lower surfaces being flat and parallel to each other; an external connecting surface linking the upper surface to the lower surface; and a flow channel connecting the upper surface (2) with the lower surface (3) via fluidic communication, said flow channel having a flow axis of symmetry (xp), the upper and lower surfaces having geometries defined by the following ratios: r1 = lol1 / lou1, between 50 and 95%, preferably between 57 and 92%, preferably between 62.5 and 90%, r2 = lol2 / lou2, between 50 and 95%, preferably between 57 and 92%, preferably between 62.5 and 90%, r3 = lal1 / lau1, greater than or equal to 75%, preferably greater than or equal to 90%, preferably greater than or equal to 95%, and r4 = lal2 / lau2,greater than or equal to 75%, preferably greater than or equal to 90%, preferably even greater than or equal to 95%, lou1 and lou2 being two segments meeting at the level of the flow symmetry axis, xp, and which together form the upper longitudinal extent, lou, defined as the longest segment connecting two points of a perimeter of the upper surface and crossing the flow symmetry axis (xp); lau1 and lau2 being two segments meeting at the flow symmetry axis, xp, and which form the upper width extent, lau, defined as the normal extent with respect to both the flow symmetry axis, xp, and the upper longitudinal extent and intersecting these and, similarly, lol1 and lol2 being two segments meeting at the flow symmetry axis, xp, and which together form the lower longitudinal extent, lol,defined as the longest segment connecting two points on the perimeter of the lower surface and intersecting the casting symmetry axis (xp); and lal1 and lal2 being two segments meeting at the casting symmetry axis, xp, and together forming the upper width extent, lal, defined as the normal extent with respect to both the casting symmetry axis, xp, and the lower longitudinal extent, and intersecting them.

Description

(Xp); LAul and LAu2 being two segments meeting at the casting symmetry axis, Xp, and which form the upper width extent, LAu, defined as the normal extent with respect to both the casting symmetry axis, Xp, and the upper longitudinal extent and crossing these and, similarly, ton and 1012 being two segments meeting at the casting symmetry axis, Xp, and which together form the lower longitudinal extent, LOI, defined as the longest segment connecting two points on a perimeter of the lower surface and crossing the casting symmetry axis (Xp); and LAII and LAI2 being two segments meeting at the level of the casting symmetry axis, Xp, and which together form the upper width extent, LAI, defined as the normal extent with respect to both the casting symmetry axis, Xp, and the lower longitudinal extent and crossing the latter.

Claims

Demands 1. Sliding drawer plate (1) for a metalworking drawer comprising - a top surface (2), - a lower surface (3), separated from the upper surface by a thickness of the sliding drawer plate, said upper and lower surfaces being flat and parallel to each other, - an external connecting surface (4) linking the upper surface (2) to the lower surface (3) and - a flow channel (5) fluidly connecting the upper surface (2) to the lower surface (3), said flow channel (5) having a flow symmetry axis (Xp), - the upper and lower surfaces (2, 3) having upper and lower longitudinal extensions (LOu, 101), respectively, which are parallel to each other, and perpendicular to the upper and lower latitudinal extensions (LAu, LAI), respectively, where the upper longitudinal extension (LOu) is the longest segment connecting two points on a perimeter of the upper surface and crossing the casting symmetry axis (Xp), - the longitudinal extensions (LOu, LOI) being divided into two segments (respectively LOul and L0u2 and LOIl and L0I2) connecting at the level of the casting symmetry axis (Xp), and in which the segments LOul and LOIl are on a first side of the casting symmetry axis, and the segments L0u2 and L0I2 are on a second side of the casting symmetry axis; - the latitudinal extensions (LAu, LAI) being divided into two segments (respectively LAul and LAu2 and LAU and LAI2) connecting at the level of the casting symmetry axis (Xp), and in which the segments LAul and LAU are on one side of the casting symmetry axis, and the segments LAu2 and LAI2 are on a second side of the casting symmetry axis; - in which the following ratios are defined, 1011 / 101 RI, LAW2 / LAu2=R2, LAIl / !Aul = R3, LAI2 / LAu2 = R4, characterized by, RI is between 50 and 95%, preferably between 57 and 92%, and more preferably between 62.5 and 90%. R2 is between 50 and 95%, preferably between 57 and 92%, and more preferably between 62.5 and 90%. R3 is greater than or equal to 75%, preferably greater than or equal to 90%, more preferably greater than or equal to 95%, and R4 is greater than or equal to 75%, preferably greater than or equal to 90%, more preferably greater than or equal to 95%.

2. Sliding drawer plate according to claim 1 in which R3=R4.

3. Sliding drawer plate according to claim 1 in which the outer connecting surface (4) comprises a plurality of surface parts (4a, 4b).

4. Sliding drawer plate according to claim 3 in which the outer connecting surface (4) comprises at least one cylindrical surface part (4a) and one or more transition surface parts (4b).

5. Sliding drawer plate according to claim 4, wherein the cylindrical surface part (4a) connects the upper surface (2) to an adjacent transition surface part (4b) and the transition surface part(s) (4b) connects the cylindrical surface part (4a) to the lower surface (3).

6. Sliding drawer plate according to any one of claims 3 to 5, wherein the outer connecting surface comprises a plurality of transition surface parts.

7. Sliding drawer plate according to any one of claims 1 to 6, wherein RI and R2 are 80% ±5%.

8. Sliding drawer plate according to any one of claims 1 to 7, wherein R3 and R4 are between 98 and 100%.

9. Sliding drawer plate according to any one of claims 1 to 8, wherein the plate comprises: - a refractory element with an upper surface (2) and a pouring channel (5) corresponding respectively to the upper surface and the pouring channel of the plate, - a metal container (7) with a bottom surface (3M) corresponding to the lower surface (3) of the sliding drawer plate, said bottom surface comprising an opening (15) surrounding the pouring channel of the sliding drawer plate. - cement binding the refractory element to the metal container.

10. A metal container (7) for enclosing a refractory element and for forming therewith a sliding drawer plate according to claim 9, said metal container comprising: - a bottom surface (3M) which is flat and defined by a perimeter, and comprising an opening (15) having a centroid point (xp), such that the axis of symmetry of casting (Xp) is the axis normal to the bottom surface and passing through the centroid point (xp); - a peripheral surface (4Ma, 4Mb) extending transversely to the bottom surface from the perimeter of said bottom surface to a free end defining an edge (4R) of the metallic container, said peripheral surface and said bottom surface defining an internal cavity of geometry adapted to the geometry of a refractory element to be adhered to the metallic container by means of a cement, and in which: - the metal container has a top longitudinal diameter (LCu) defined as the longest segment, connecting two points on the edge of the metal container and intersecting the casting symmetry axis (Xp), and has a top latitudinal diameter (LDu) connecting two points on the edge of the metal container, and intersecting perpendicularly the top longitudinal diameter (LCu) and the casting symmetry axis (Xp), - the bottom surface (3M) has a lower longitudinal diameter (ICI), which is parallel to the upper longitudinal diameter (LCu) and has a lower latitudinal diameter (LDI), which is parallel to the lower longitudinal diameter (LDu), the two lower longitudinal and lower latitudinal diameters intersecting the casting symmetry axis at the centroid point (xp); - the upper and lower longitudinal diameters (ICu, ICI) being divided into two segments (respectively ICul and ICu2 and Cl and CI2) connecting at the level of the casting axis (Xp), and in which the segments ICul and ICIl are on a first side of the casting symmetry axis, and the segments O2 and 1012 are on a second side of the casting symmetry axis; - the upper and lower latitudinal diameters (IDu, IDI) being divided into two segments (respectively IDul and !Du2 and IDIl and !DI2 and !DI2) connecting at the level of the casting symmetry axis (Xp), and in which the segments lAul and lAll are on a first side of the casting symmetry axis, and the segments !Du2 and !DI2 are on a second side of the casting symmetry axis; characterized by the fact that the following ratios are defined, Rcl = ICIl / ICul, is between 50 and 95%, preferably between 57 and 92%, more preferably between 62.5 and 90%, Rc2 = LCI2 / LCu2, is between 50 and 95%, preferably between 57 and 92%, more preferably between 62.5 and 90%, RcS = LD11 / LD11, is greater than or equal to 75%, preferably greater than or equal to 90%, more preferably greater than or equal to 95%, Rc4 = LDI2 / LDu2, is greater than or equal to 75%, preferably greater than or equal to 90%, more preferably greater than or equal to 95%.

11. Sliding drawer comprising a set of first and second sliding drawer plates mounted in a frame, in which, - the first sliding drawer plate (11) conforms to any one of claims 1 to 9; - the second sliding drawer plate (lu) comprises a flat upper surface (2U) which is flat and has an upper area, AU, delimited by a perimeter enclosing an outlet of a pouring hole (5U) and of the same geometry as the upper surface (21) of the first sliding drawer plate, and comprises a lower surface (3U), which is flat and is delimited by a perimeter surrounding an inlet of the pouring hole (su), the flat upper and lower surfaces of the second sliding drawer plate being parallel to each other, - wherein said first and second sliding drawer plates are mounted in a frame with their respective upper surfaces in contact and parallel to each other such that, - the second sliding drawer plate is fixedly mounted in the frame, - the first sliding drawer plate can move reversibly along a plane parallel to the upper surfaces of the first and second sliding drawer plates from a casting position, in which the casting hole (5U) of the first sliding drawer plate (lu) is aligned with the casting hole (51) of the second sliding drawer plate (11), to a closed position, in which the casting hole of the first sliding drawer plate (lu) is not in fluidic communication with the casting hole of the second sliding drawer plate (11), - said sliding drawer further comprising several pusher units distributed around, and applying a pushing force on the lower surface (31) of the first sliding drawer plate (11), oriented perpendicularly to said lower surface (31) of the first sliding drawer plate, to press the upper surface of the first sliding drawer plate against the upper surface of the second sliding drawer plate. 12.1 sliding drawer according to claim 11, wherein the second drawer plate (read) is according to any one of claims 1 to 9, and is preferably identical to the first drawer plate (11). Sliding drawer according to claim 11 or 12, wherein: - the first sliding drawer plate (11) is supported by a carriage (10) mounted on a sliding mechanism, so that the upper surface (21) of the first sliding drawer plate can slide between the extended position and the closed position, said carriage comprising a lower surface, - the pushers (11) apply a pushing force (F) on the lower surface of the carriage, so as to press the upper surface (21) of the first sliding drawer plate against the upper surface (2U) of the second sliding drawer plate (lu), said force (F) being oriented perpendicular to the lower surface of the carriage.

14. Sliding drawer according to claim 13, in which (a) the trolley includes a top surface parallel to and recessed from the top surface of the first sliding drawer plate, (b) the pushers are static and face the second sliding drawer plate regardless of the position of the first sliding drawer plate, (c) the lower surface of the carriage is in permanent contact with at least some of the pushers, and has a geometry including chamfered parts, so that a pusher only comes into contact with the lower surface of the carriage in the case where the projection onto a longitudinal plane (Xpl, LOu) defined by the casting symmetry axis (Xpl) and the upper longitudinal extension (LOu) of the first sliding plate (11) of the force vector defining the force (F) applied by said pusher in contact with the lower surface intersects the projection onto said longitudinal plane of the first sliding drawer plate.

15. Sliding drawer according to claim 14, wherein, when a pusher does not face the first sliding drawer plate, it is not in contact with the lower surface of the carriage, which is chamfered at said part.