Seismic valve

Details Seismic valve Seismic valve

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 17/36 (2006.01)

Patent

CA 2150725

A seismic shut off valve includes a cripple column (52, 66) responsive to seismic movement. A toggle spring (100) overlies the cripple column (52, 66). Latch pins (130) extend from the toggle spring (100) into a valve body to hold a poppet valve (166) in an open position. During an earthquake the cripple column (52, 66) buckles causing the toggle spring (100) to bow upwardly under spring force exerted on the toggle spring (100) through the latch pins (136) from the poppet valve (166). The latch pins (136) release the poppet valve (166) which shifts to seal against a valve seat in the valve body. A ball joint (28) connecting the valve body and cripple column (52, 66) allows the cripple column (52, 66) to be vertically aligned despite the use of the valve on a non-vertical pipe.

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