Tightening device for a refractory plate of sliding closure on the spout of a vessel for molten metal

Abstract

A clamping device ( 2 ″) is provided for a refractory plate ( 3 ) of a slide closure at the outlet of a container for metal melt. The plate ( 3 ) has two pairs of side faces ( 10, 11 ), disposed mirror-symmetrically with respect to its longitudinal center plane (L), at which a clamping element ( 22″, 23″, 43 ) disposed in a slider housing ( 1 ) engages with its clamping faces. The side faces ( 10, 11 ) disposed at one side of the longitudinal center plane (L) form an obtuse angle (γ). Three of the clamping elements are developed as binding fittings ( 22″, 23″ ) pivotably supported in the slider housing ( 1 ) and the fourth clamping element has a binding jaw ( 43, 30 ) displaceable in the direction toward the corresponding side face ( 10 or 11 ). Therewith results a simple and optimal bracing of this plate ( 3 ) stress-loaded by the high-level heating generated during operation.

1 . Clamping device for a refractory plate ( 3 ) of a slide closure at the outlet of a container for metal melt, the plate ( 3 ) comprising two pairs of side faces ( 10 ,  11 ), disposed mirror-symmetrically with respect to its longitudinal center plane (L), at which engage clamping elements ( 22 ″,  23 ″,  43 ) disposed in a slider housing ( 1 ) with their clamping faces, the side faces ( 10 ,  11 ) disposed at one side of the longitudinal center plane (L) forming an obtuse angle γ, characterized in that three of the clamping elements are developed as binding fittings ( 22 ″,  23 ″) pivotably supported in the slider housing ( 1 ), and the fourth clamping element comprises a binding jaw ( 43 ;  30 ) displaceable in the direction of the corresponding side face ( 10  or  11 ).  
   
   
       2 . Clamping device as claimed in  claim 1 , characterized in that the binding jaw ( 43 ) is supported under articulation in the slider housing ( 1 ) and is displaceably guided by a bracing means ( 45 ) against the side face ( 10  or  11 ).  
   
   
       3 . Clamping device as claimed in  claim 1 , characterized in that the binding jaw ( 30 ) is disposed displaceably in a base body ( 26 ) fixed to the housing, and for the displacement of the binding jaw ( 30 ) a rotationally displaceable cam ( 37 ) is provided, whose rotational axis (e) runs transversely to the displacement direction of the binding jaw ( 30 ).  
   
   
       4 . Clamping device as claimed in  claim 3 , characterized in that the binding jaw ( 30 ) is disposed longitudinally displaceably in a recess ( 27 ) of the clamping element base body ( 26 ) and includes an opening ( 40 ) for the displacement disposed transversely with respect to the displacement direction, at whose inner face the rotationally displaceable cam ( 37 ) engages.  
   
   
       5 . Clamping device as claimed in  claim 4 , characterized in that the clamping jaw ( 30 ) is disposed with clearance in the recess ( 27 ) and is guided slidably via two pins ( 34 ) projecting into two longitudinal grooves ( 35 ) in a bottom face ( 28 ) of the recess ( 27 ).  
   
   
       6 . Clamping device as claimed in  claim 4 , characterized in that the inner face of the opening ( 40 ) includes a circular portion ( 40   a ) cooperating with the eccentric face ( 38 ) of the cam ( 37 ) and, in a region facing away from a binding jaw clamping face ( 32 ), a flat portion ( 40   b ), and through the cooperation of an edge ( 39 ), terminating the eccentric face ( 38 ), with the flat portion ( 40   b ) the binding jaw ( 30 ) can be displaced away from the side face ( 10  or  11 ) of the plate ( 3 ).  
   
   
       7 . Clamping device for a refractory plate ( 3 ) of a slide closure at the outlet of a container for metal melt, the plate ( 3 ) being provided with at least two side faces ( 10  or  11 ), disposed mirror-symmetrically with respect to its longitudinal center plane (L) and forming an angle (α or β), at which clamping elements ( 22 ,  23 ;  22 ′,  23 ′) disposed in a slider housing ( 1 ), engage with their clamping faces ( 24 ,  32 ;  24 ′,  32 ′), characterized in that a clamping element ( 22 ;  22 ′) comprises a base body ( 26 ) fixed to the housing and a binding jaw ( 30 ) displaceable in the base body ( 26 ) in the direction toward the corresponding side face ( 10  or  11 ), and for the displacement of the binding jaw ( 30 ) a rotationally displaceable cam ( 37 ) is provided, whose rotational axis (e) runs transversely to the displacement direction of the binding jaw ( 30 ).  
   
   
       8 . Clamping device as claimed in  claim 5 , characterized in that the inner face of the opening ( 40 ) includes a circular portion ( 40   a ) cooperating with the eccentric face ( 38 ) of the cam ( 37 ) and, in a region facing away from a binding jaw clamping face ( 32 ), a flat portion ( 40   b ), and through the cooperation of an edge ( 39 ), terminating the eccentric face ( 38 ), with the flat portion ( 40   b ) the binding jaw ( 30 ) can be displaced away from the side face ( 10  or  11 ) of the plate ( 3 ).