Sliding closure for a metallurgical vessel

Abstract

The invention relates to a sliding closure for a metallurgical vessel, comprising at least two fireproof closure plates ( 3, 4, 5 ) that can be pressed against each other and can each be clamped in a plate frame ( 7, 8, 9 ) by means of clamping jaws ( 10, 11, 12 ) that can be actuated by means of an eccentric unit ( 15 ). In order to actuate the clamping jaws ( 10, 11, 12 ), the eccentric units ( 15 ) are each provided with a rotary part ( 151 ), which has an upper and lower eccentric ( 28 and 29 ) and a centering pin ( 30 ), which is supported in the plate frame ( 7, 8, 9 ), wherein the one eccentric ( 28 ) acts on the clamping jaw ( 10, 11, or 12 ). Advantageously, the upper eccentric ( 29 ) interacts with a part ( 34 ) of the plate frame ( 7, 8, 9 ) in such a way that the upper eccentric is pressed against said part ( 34 ) in a clamping direction in the outer region ( 36 ) of the upper eccentric when the clamping jaw ( 10, 11, 12 ) is released. Thus, a plate exchange can be performed safely.

1 . A sliding closure for a metallurgical vessel, comprising at least two fire-proof closure plates ( 3 ,  4 ,  5 ) that can be pressed against each other and can each be clamped in a plate frame ( 7 ,  8 ,  9 ) by means of clamping jaws ( 10 ,  11 ,  12 ) that can be actuated by means of an eccentric unit ( 15 ), characterised in that in order to actuate the clamping jaws ( 10 ,  11 ,  12 ) the eccentric units ( 15 ) are each provided with a rotary part ( 15 ′) which has an upper and lower eccentric ( 28  and  29 ) and a centring pin ( 30 ) which is supported in the plate frame ( 7 ,  8 ,  9 ), wherein the one eccentric ( 28 ) acts on the clamping jaw ( 10 ,  11  or  12 ). 
     
     
         2 . The sliding closure according to  claim 1 , characterised in that the upper eccentric ( 29 ) interacts with a part ( 34 ) of the plate frame ( 7 ,  8 ,  9 ) in such a way that when the clamping jaw ( 10 ,  11 ,  12 ) is released, this upper eccentric is pressed against this part ( 34 ) without any gaps in the direction of clamping in its outer region ( 36 ). 
     
     
         3 . The sliding closure according to  claim 1 , wherein the upper eccentric interacts with the part of the plate frame such that in the released state, self-retention that exceeds the force of gravity is generated between the upper eccentric and the part of the plate frame so that the respective eccentric unit remains in the released state. 
     
     
         4 . The sliding closure according to  claim 1 , wherein when the clamping jaw is clamped, the lower eccentric is pressed against said clamping jaw, while there is a gap between the upper eccentric and the part in the direction of clamping so that it is positioned in the part with play. 
     
     
         5 . The sliding closure according to  claim 1 , wherein the rotary part of the respective eccentric unit has a coaxially located polygonal bore into which a corresponding polygonal pin is insertable respectively in order to rotate said rotary part insertably. 
     
     
         6 . The sliding closure according to  claim 1 , further comprising a housing and a slider lid hinged on the housing with at least one hinge and at least two, preferably three fire-proof closure plates that are pressable against one another between the housing and the slider lid, wherein the at least one hinge is formed such that after closing, the slider lid is guided relative to the housing translationally to the sliding surfaces of the closure plates. 
     
     
         7 . The sliding closure according to  claim 6 , characterised in that two hinges ( 13 ,  14 ) are allocated on the one longitudinal or transverse side of the housing ( 1 ) spaced apart from one another, after closing the slider lid ( 2 ) the hinge leaf ( 23 ) fastened to it being able to be shifted relative to the hinge leaf ( 22 ) fastened to the housing ( 1 ) perpendicularly to the sliding surfaces of the closure plates. 
     
     
         8 . The sliding closure according to  claim 7 , characterised in that the hinge leaf ( 23 ) fastened to the slider lid ( 2 ) is provided with a hinge pin ( 24 ) that is guided, such as not to swivel, in a guide groove ( 25 ) of the other hinge leaf ( 22 ) that is aligned perpendicularly to the sliding surfaces of the closure plates. 
     
     
         9 . The sliding closure according to  claim 7 , wherein the hinge pin is cylindrical, but is flattened on both sides, sliding without any play within a correspondingly calibrated region of the guide groove in the flattened region, while being able to rotate freely in a round hole adapted to the diameter of the hinge pin at the lower end of the guide groove. 
     
     
         10 . The sliding closure according to wherein clamping screws, arranged in pairs, for clamping the slider lid to the housing, are provided on both longitudinal sides, preferably between the hinges, after closing the lid being guided correspondingly parallel to the working surface while being clamped. 
     
     
         11 . The sliding closure according to  claim 6 , characterised in that the clamping screws ( 17 ) are suspended in U-shaped holders ( 18 ) of the housing ( 1 ) and can be swivelled into U-shaped profiled flanges ( 19 ) of the slider lid ( 2 ), having on their free end a threaded part with a clamping nut ( 20 ) sitting on the latter, which clamping nut can be pressed against the flanges ( 19 ) of the slider lid ( 2 ) in the swivelled in position. 
     
     
         12 . The sliding closure according to  claim 6 , characterised in that face side corresponding abutment surfaces are provided on the U-shaped holders ( 18 ) in the housing ( 1 ) or on the slider lid ( 2 ) so that the latter can only be closed to the point at which it is positioned approximately parallel to the housing so that the closure plates are not touching one another at the edges when swivelled shut. 
     
     
         13 . The sliding closure according to  claim 2 , wherein the upper eccentric interacts with the part of the plate frame such that in the released state, self-retention that exceeds the force of gravity is generated between the upper eccentric and the part of the plate frame so that the respective eccentric unit remains in the released state. 
     
     
         14 . The sliding closure according to  claim 13 , wherein when the clamping jaw is clamped, the lower eccentric is pressed against said clamping jaw, while there is a gap between the upper eccentric and the part in the direction of clamping so that it is positioned in the part with play. 
     
     
         15 . The sliding closure according to  claim 2 , wherein when the clamping jaw is clamped, the lower eccentric is pressed against said clamping jaw, while there is a gap between the upper eccentric and the part in the direction of clamping so that it is positioned in the part with play. 
     
     
         16 . The sliding closure according to  claim 3 , wherein when the clamping jaw is clamped, the lower eccentric is pressed against said clamping jaw, while there is a gap between the upper eccentric and the part in the direction of clamping so that it is positioned in the part with play. 
     
     
         17 . The sliding closure according to  claim 2 , wherein the rotary part of the respective eccentric unit has a coaxially located polygonal bore into which a corresponding polygonal pin is insertable respectively in order to rotate said rotary part insertably. 
     
     
         18 . The sliding closure according to  claim 3 , wherein the rotary part of the respective eccentric unit has a coaxially located polygonal bore into which a corresponding polygonal pin is insertable respectively in order to rotate said rotary part insertably. 
     
     
         19 . The sliding closure according to  claim 2 , further comprising a housing and a slider lid hinged on the housing with at least one hinge and at least two that are pressable against one another between the housing and the slider lid, wherein the at least one hinge is formed such that after closing, the slider lid is guided relative to the housing translationally to the sliding surfaces of the closure plates. 
     
     
         20 . The sliding closure according to  claim 2 , further comprising a housing and a slider lid hinged on the housing with at least one hinge and at least two that are pressable against one another between the housing and the slider lid, wherein the at least one hinge is formed such that after closing, the slider lid is guided relative to the housing translationally to the sliding surfaces of the closure plates.