Pressure relief device and method for its production

Abstract

The invention relates to a pressure relief device and to a method for producing a pressure relief device, the pressure relief device (10) comprising a rupture disc (11) and a vacuum support (12, 32), the rupture disc and the vacuum support being made of graphite, the one-piece rupture disc having an exit side (13) and an entry side (14), the rupture disc having a recess (15) on the entry side, said recess (15, 33) forming a rupture area (17) within a retainer (16) of the rupture disc, the vacuum support being inserted in the recess, the pressure relief device having a carbon retaining device (30) for a form-fitted fastening of the vacuum support in the recess.

1 . A pressure relief device ( 10 ), comprising a rupture disc ( 11 ,  31 ) and a vacuum support ( 12 ,  32 ), the rupture disc and the vacuum support being made of graphite, the one-piece rupture disc having an exit side ( 13 ) and an entry side ( 14 ), the rupture disc having a recess ( 15 ,  33 ) on the entry side, said recess ( 15 ,  33 ) forming a rupture area ( 17 ) within a retainer ( 16 ) of the rupture disc, the vacuum support being inserted in the recess, wherein the pressure relief device has a carbon retaining device ( 30 ) for a form-fitted fastening of the vacuum support ( 12 ,  32 ) in the recess, wherein an abutment ( 36 ) is formed in the recess ( 33 ) and limits a movement of the vacuum support ( 32 ) in the direction of the rupture area ( 17 ). 
     
     
         2 . The pressure relief device according to  claim 1 , wherein the pressure relief device ( 10 ) is made free of adhesive material or metal. 
     
     
         3 . The pressure relief device according to  claim 1 , wherein the pressure relief device ( 10 ) is made entirely of carbon. 
     
     
         4 . The pressure relief device according to  claim 1 , wherein the rupture area ( 17 ) has an evenly thick and flat membrane ( 18 ,  38 ). 
     
     
         5 . The pressure relief device according to  claim 1 , wherein the membrane ( 18 ,  38 ) has a predetermined breaking point realized from material fatigue. 
     
     
         6 . The pressure relief device according to  claim 1 , wherein the exit side ( 13 ) of the rupture disc ( 11 ,  31 ) is designed entirely flat. 
     
     
         7 . The pressure relief device according to  claim 1 , wherein the vacuum support ( 12 ,  32 ) is shaped like a disc and abuts against an inner diameter ( 24 ) of the retainer ( 16 ) with its outer diameter ( 23 ). 
     
     
         8 . The pressure relief device according to  claim 1 , wherein a plurality of through openings ( 19 ) are formed in the vacuum support ( 12 ,  32 ). 
     
     
         9 . The pressure relief device according to  claim 1 , wherein the retaining device ( 30 ) is made of a groove in an inner surface of the retainer ( 16 ) and a retaining element ( 28 ) inserted in the groove. 
     
     
         10 . The pressure relief device according to  claim 9 , wherein the groove is realized as a circular groove ( 27 ,  35 ). 
     
     
         11 . The pressure relief device according to  claim 9 , wherein the retaining element ( 28 ) is a string, braid, cord or band made of carbon fibers. 
     
     
         12 . The pressure relief device according to  claim 11 , wherein the carbon fibers are infiltrated by or coated with pyrolytic carbon. 
     
     
         13 . The pressure relief device according to  claim 9 , wherein the retaining element ( 28 ) is at least partially rigid. 
     
     
         14 . The pressure relief device according to  claim 9 , wherein the retaining element ( 28 ) forms a spring washer ( 29 ).