Safety valve device

F - Mech Eng,Light,Heat,Weapons – 16 – K

Patent

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Details

F16K 17/38 (2006.01)

Patent

CA 2585582

A safety valve device, wherein in an emergency, a valve element (26) drivingly displaced from a closed position (42) to an open position (43) according to the melting of a fuse piece (28) receives the resultant force of a pressing force by the primary pressure (P1) of a gas led to a primary port (56) in an opening direction (X1) in the disposed state at a position near the open position (43) including a fluid drive start position between the closed position (42) and the open position (43). The valve element (26) is formed so that the resulting force of the pressing force by the primary pressure (P1) in the opening direction (X1) is reduced in the disposed state at a position nearer the closed position (42) than the fluid drive start position more than in the disposed state at the position near the open position (43) including the fluid drive start position. Thus, the small safety valve device can achieve rapid opening operation in an emergency while suppressing the pressing force on a displacement stop means stopping the opening operation in an emergency.

La présente invention décrit un dispositif de soupape de sécurité dans lequel, en cas d~urgence, un élément de soupape (26) déplacé de façon commandée d~une position fermée (42) à une position ouverte (43) selon la fusion d~une pièce de fusible (28) reçoit la force résultante d~une force de compression par la pression primaire (P1) d~un gaz conduit jusqu~à un orifice primaire (56) dans une direction d~ouverture (X1) dans l~état disposé dans une position proche de la position ouverte (43), comprenant une position de départ de commande hydraulique entre la position fermée (42) et la position ouverte (43). L~élément de soupape (26) est formé de sorte que la force résultante de la force de compression par la pression primaire (P1) dans la direction d~ouverture (X1) soit réduite davantage dans l~état disposé dans une position, plus proche de la position fermée (42) que de la position de départ de commande hydraulique, que dans l~état disposé dans la position proche de la position ouverte (43) comprenant la position de départ de commande hydraulique. Ainsi, le petit dispositif de soupape de sécurité peut réaliser une opération d~ouverture rapide en cas d~urgence tout en supprimant la force de compression sur un moyen d~arrêt de déplacement arrêtant l~opération d~ouverture en cas d~urgence.

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