DISPOSITIF DE SECURITE A LIBERATION DE PRESSION

DISPOSITIF DE SECURITE A LIBERATION DE PRESSION COMPORTANT UN DISQUE DE RUPTURE 24 QUI SE BOMBE LORSQU'UNE ONDE DE CHOC S'EXERCE A SA SURFACE ET SE BOMBE ET SE ROMPT LORSQUE DES PRESSIONS EN FLUIDE EGALES OU SUPERIEURES A UNE PRESSION PREDETERMINEE EST EXERCEE. CE DISPOSITIF COMPORTE EGALEMENT UN ELEMENT DE RUPTURE 26 DISPOSE DERRIERE ET DE MANIERE ADJACENTE AU DISQUE DE RUPTURE 24, CET ELEMENT 26 ETANT BOMBE ET ROMPU LORSQUE LE DISQUE DE RUPTURE SE BOMBE, MAIS N'ETANT PAS ROMPU LORSQU'UNE PRESSION EN FLUIDE COMPRIMEE, INFERIEURE A LA PRESSION PREDETERMINEE, ACCOMPAGNEE PAR UNE ONDE DE CHOC, AGIT SUR LEDIT DISQUE DE RUPTURE, LEDIT DISQUE DE RUPTURE 24 SE BOMBE ET SE TROUVE EMPECHE DE SE ROMPRE SOUS L'ACTION DE L'ELEMENT DE RUPTURE 26, LEQUEL SE BOMBE ET SE BRISE, CE QUI PERMET D'ABSORBER L'ENERGIE DE L'ONDE DE CHOC. A pressure relief apparatus is provided to retain pressurized fluid at a pressure below the design pressure but accompanied by a shock wave and includes a rupture disk 24 which bulges when a shock wave is exerted thereon and bulges and ruptures at a fluid pressure equal to or greater than the design pressure. The apparatus also includes a rupture member 26 positioned behind and adjacent the rupture disk 24, this rupture member rupturing when bulged by the rupture disk whereby when pressurized fluid is at a pressure below the predetermined pressure accompanied by a shock wave acts on the rupture disk, the rupture disk bulges and is constrained against rupture by the rupture member which bulges and ruptures thereby absorbing the energy of the shock wave.