Tank protected against overpressure

Abstract

A tank capable of containing a liquid has a first volume ( 21 ) capable of containing the liquid ( 22 ), the first volume ( 21 ) having at least one opening ( 23 ) initially sealed by a first wall ( 24 ) and the first wall ( 24 ) being capable of being retracted when a pressure exerted thereon exceeds a specific threshold. The tank further has a second flexible wall ( 30 ), sealing said opening ( 23 ) in a sealed manner when the first wall ( 24 ) is retracted and capable of being deployed, via said opening ( 23 ), after the retraction of the first wall ( 24 ), in order to provide the liquid with a volume that is greater than the first volume ( 21 ).

1 . A tank capable of containing a liquid, comprising a first volume ( 21 ) capable of containing said liquid ( 22 ), said first volume ( 21 ) comprising at least one opening ( 23 ) initially sealed by a first wall ( 24 ), said first wall ( 24 ) being capable of being retracted when a pressure exerted thereon exceeds a specific threshold, characterized in that the tank comprises a second flexible wall ( 30 ), sealing said opening ( 23 ) in a sealed manner when the first wall ( 24 ) is retracted and capable of being deployed, via said opening ( 23 ), after the retraction of said first wall ( 24 ), in order to provide the liquid with a volume that is greater than the first volume ( 21 ). 
     
     
         2 . The tank of  claim 1 , where said second flexible wall ( 30 ) forms part of a flexible casing ( 35 ) capable of containing said liquid ( 22 ) and capable of substantially following the internal shape of the first volume ( 21 ) as long as the first wall ( 24 ) is not retracted. 
     
     
         3 . The tank of  claim 2 , where the first volume ( 21 ) is rigid. 
     
     
         4 . The tank of  claim 1 , comprising a second volume ( 25 ) in communication with the first volume ( 21 ) via said opening ( 23 ), capable of receiving said second flexible wall ( 35 ) when deployed. 
     
     
         5 . The tank of  claim 4 , where the second volume is rigid ( 25 ). 
     
     
         6 . The tank of  claim 1 , where the retraction of the first wall ( 24 ) is obtained by rupture of the first wall ( 24 ). 
     
     
         7 . The tank of  claim 1 , where the retraction of the first wall ( 24 ) is obtained by the rupture of at least one fixing ( 34 ) of said first wall ( 24 ). 
     
     
         8 . The tank of  claim 1 , where the second flexible wall ( 30 ) is initially folded up before deployment, the deployment being obtained by unfolding. 
     
     
         9 . The tank of  claim 1 , where the second flexible wall ( 30 ) is elastic, the deployment being obtained by elastic deformation. 
     
     
         10 . The tank of  claim 1 , where the second flexible wall ( 30 ) and the flexible casing ( 35 ) are made of a coated textile.