Slam shut safety device

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

Patent

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Details

F16K 17/04 (2006.01) F16K 17/164 (2006.01)

Patent

CA 2683018

A safety device for a gas distribution system includes a valve body (12), an upper casing (14) attached to the valve body, the upper casing housing two springs (30, 32). The two springs are co-axially located and separated by a casting tube. Further, the two springs are attached to a movable diaphragm (42), that, is exposed to gas system pressure. A snap ring flange (16) is also attached to the valve body, the snap ring flange being used to secure the safety device to a main regulator in the gas distribution system. The valve body also includes a cam (62) mounted within the valve body. A limit switch (18) is directly connected to the cam such that the limit switch moves directly in response to movement of the diaphragm. Additionally, a reset pin (66) extends from the valve body and interacts with the cam such that the ca may be reset from a closed position to an open position by moving the reset pin.

Le dispositif de sécurité selon l'invention, destiné à un système de distribution de gaz, comprend un corps de soupape, un boîtier supérieur relié au corps de soupape, le boîtier supérieur contenant deux ressorts. Les deux ressorts sont situés coaxialement et sont séparés par un tube coulé. De plus, les deux ressorts sont reliés à un diaphragme mobile qui est exposé à la pression du système d'alimentation en gaz. Une collerette à bague de retenue est également reliée au corps de soupape, et la collerette à bague de retenue sert à fixer le dispositif de sécurité sur un régulateur principal dans le système de distribution de gaz. Le corps de soupape comprend également une came montée dans le corps de soupape. Un contact de fin de course est directement relié à la came afin que le contact de fin de course se déplace directement en réponse à un mouvement du diaphragme. De plus, un réinitialisateur s'étend depuis le corps de soupape et interagit avec la came afin que la came puisse passer d'une position fermée à une position ouverte en déplaçant le réinitialisateur.

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