Gas seal

Abstract

Disclosed is a gas seal for sealing the upper opening of a large-volume container, the container exhibiting a wall encircling the opening. The gas seal comprises a gas holder foil 1 resting in its peripheral area in the area of the wall, at least four pinch plates 6 mounted circumferentially on the upper edge of the wall, and a sealing cord 4 . The peripheral area of the gas holder foil 1 is overturned and the sealing cord 4 inserted circumferentially in the overturned gas holder foil 1 . The pinch plates 6 squeeze the gas holder foil 1 , in its overturned area, to the upper edge of the wall.

1 . A gas seal for sealing the upper opening of a large-volume container, the container exhibiting a wall encircling the opening, comprising a gas holder foil ( 1 ) resting in its peripheral area in the area of the wall, at least four pinch plates ( 6 ) mounted circumferentially on the upper edge of the wall, and a sealing cord ( 4 ), the peripheral area of the gas holder foil ( 1 ) being overturned, the sealing cord ( 4 ) being inserted circumferentially in the overturned gas holder foil ( 1 ), and the pinch plates ( 6 ) squeezing the gas holder foil ( 1 ) in its overturned area to the upper edge of the wall.  
   
   
       2 . The gas seal according to  claim 1 , characterized in that the pinch plates ( 6 ) squeeze the gas holder foil ( 1 ) in its overturned area to the upper edge of the wall with the aid of set screws ( 5 ).  
   
   
       3 . The gas seal according to  claim 1 , characterized in that, additionally, counter bearings ( 7 ) are provided, the pinch plates ( 6 ) being supported on the upper edge of the wall via the counter bearings ( 7 ).  
   
   
       4 . The gas seal according to  claim 1 , characterized in that, additionally, a squish band ( 3 ) is provided, the pinch plates ( 6 ) exerting pressure on the squish band ( 3 ) and the gas holder foil ( 1 ) in this way being squeezed in its overturned area to the upper edge of the wall.  
   
   
       5 . The gas seal according to  claim 1 , characterized in that, additionally, a mounting rail ( 2 ) attached circumferentially to the upper edge of the wall is provided, the gas holder foil ( 1 ) resting at least in its overturned area on the mounting rail ( 2 ).  
   
   
       6 . The gas seal according to  claim 5 , characterized in that the mounting rail ( 2 ) exhibits a rectangular cross section.  
   
   
       7 . The gas seal according to  claim 5 , characterized in that the mounting rail ( 2 ) exhibits an L-shaped cross section and one leg of the mounting rail is recessed into the wall.  
   
   
       8 . The gas seal according to  claim 7 , characterized in that the wall of the large-volume container consists of concrete and one leg of the mounting rail ( 2 ) is anchored firmly in the concrete.  
   
   
       9 . The gas seal according to  claim 1 , characterized in that a net ( 13 ) is attached over the gas holder foil ( 1 ).  
   
   
       10 . The gas seal according to  claim 9 , characterized in that the net ( 13 ) is fastened to the end of the pinch plates ( 6 ) facing away from the large-volume container.  
   
   
       11 . The gas seal according to  claim 10 , characterized in that the end of the pinch plate ( 6 ) facing away from the large-volume container is designed as an eyelet ( 8 ).  
   
   
       12 . The gas seal according to  claim 1 , characterized in that at least one pinch plate ( 6 ) is provided per meter perimeter of the wall of the large-volume container.  
   
   
       13 . The gas seal according to  claim 1 , characterized in that at least two pinch plates ( 6 ) are provided per meter perimeter of the wall of the large-volume container.