Tundish carriage with a lifting device for a tundish
A tundish carriage with a lifting device ( 1 ) for a tundish ( 2 ) for liquid steel materials, in particular in a multi-strand caster, wherein the tundish ( 2 ) is supported, with a possibility to be lifted or lowered, by controlled electromechanical or hydraulic lifting devices ( 1 a, 1 b ) on a carriage frame ( 7 ), prevents a quadruple arrangement of piston-cylinder units and a complicated synchronization control, with security for personnel and a noticeable simplification of construction, by providing a single vertical support ( 9 ) and only two lifting devices ( 1 a, 1 b ).
1. A tundish carriage displaceable on a teeming platform ( 3 ) located above a continuous casting mold ( 4 ) of a continuous casting machine ( 5 ) on a pair of rails ( 6 a , 6 b ), the tundish carriage comprising a pair of lifting devices ( 1 a , 1 b ) for supporting a tundish ( 2 ) with a possibility of lifting and lowering the tundish; and a frame ( 7 ) on which the lifting devices are supported,
Wherein the frame ( 7 ) is formed of longitudinal and cross-beams ( 7 a , 7 b ) and includes displacement drives ( 8 ) provided on at least one of opposite sides of the frame ( 7 ), a vertical support ( 9 ) for the tundish ( 2 ) and located between the cross-beams ( 7 b ), two, spaced from each other, side supports ( 10 a , 10 b ) arranged on respective lifting devices ( 1 a , 1 b ) secured on respective longitudinal beams ( 7 a , 7 a ), and a pair of arms ( 9 a , 9 b ) provided on respective side supports ( 10 a , 10 b ) for supporting the vertical support ( 9 ).
2. A tundish carriage according to claim 1 , wherein the side supports ( 10 a , 10 b ) are formed of coaxial rollers ( 11 a , 11 b ).
3. A tundish carriage according to claim 1 , wherein the lifting device ( 1 a , 1 b ) is formed by a hydraulic piston-cylinder unit, the side supports ( 10 a 10 b ) being provided on a respective cylinder housing.
4. A tundish carriage according to claim 1 , further comprising a longitudinally displaceable tilting table ( 12 ) for the tundish ( 2 ) supported in the vertical support ( 9 ) on a loose side ( 14 a ) of the vertical support, the vertical support ( 9 ) having two symmetrically arranged pairs of support points ( 13 a - 13 d ) for the tundish ( 2 ).
5. A tundish carriage according to claim 4 , wherein the tilting table ( 12 ) is supported in the vertical support ( 9 ) with a compensation support ( 15 ).
6. A tundish carriage according to claim 4 , wherein the tilting table ( 12 ) is supported in the vertical support ( 9 ) for a pivotal movement about a cross-axle ( 16 ) extending parallel to the cross-beams ( 7 b ).
7. A tundish carriage according to claim 1 , comprising a hydraulic flow divider ( 17 ) for connecting the hydraulic lifting devices ( 1 a , 1 b ) to a common feeding conduit ( 17 a ).
8. A tundish carriage according to claim 7 , wherein the flow divider ( 17 a ) is formed of electromagnetically controlled valves ( 18 a , 18 b ).
9. A tundish carriage according to claim 4 , wherein the support points ( 13 a - 13 d ) are provided with load cells ( 19 ) forming a weighing device ( 20 ).
10. A tundish carriage according to claim 3 , wherein the tundish weight is determined by measuring pressure in a hydraulic cylinder ( 1 e ) and a subsequent conversion.
11. A tundish carriage according to claim 1 , comprising an adjusting device ( 22 ) secured on a fixed side ( 14 b ) of the vertical support ( 9 ) and provided on one rail side ( 23 ).
12. A tundish carriage according to claim 11 , wherein on a rail side ( 24 ) opposite the adjusting device ( 22 ), a device for cross-adjustment of the tundish ( 2 ) is provided.
13. A tundish carriage according to claim 1 , comprising an adjusting device ( 22 ) on the loose side ( 14 a ), a compensation device ( 32 ) on the fixed side ( 14 b ), and thrust-transmitting means for connecting the adjusting and compensation devices.
14. A tundish carriage according to claim 12 , wherein the device ( 25 ) for cross-adjustment of the tundish ( 2 ) engages the arms ( 9 a , 9 b ) of the vertical support ( 9 ) and is supported on the lifting device ( 1 a ; 1 b ).