PULSE SAFETY DEVICE Russian patent published in 2016 - IPC F16K17/10 F16K17/40 

FIELD: manufacturing technology.

SUBSTANCE: device comprises a normally open main safety valve, made in the form of a straight plug valve, plug 3 of which is connected via transfer mechanism 5 with differential piston 6 of bilateral servo drive 7. Working cavities 9 and 10 of the servo drive are connected to each other via through channel 8 made in differential piston 6. Servo drive 7 is controlled using the pulse valve by working medium extracted from a protected object. Gate of the pulse valve includes normally open lifting closure member 15, equipped with control piston 16, diameter of which is equal to diameter of a through hole in seat 14 of the pulse valve. Control piston 16 is installed in control cylinder 17, head-end 18 and subpiston 20 cavity of which are communicated via working cavities 9 and 10 of servo drive 7 with hole 22 for withdrawal of working medium extracted from a protected object. Device comprises disruptive safety membranes 1, 24 and 25. Membrane 1 separates hole 22 from the inlet into the main safety valve, membrane 24 is installed at the inlet into cavity 18 of control cylinder 17 and membrane 25 - at the inlet into cavity 20, wherein membranes 24 and 25 are designed for smaller operation pressure than operation pressure of the membrane.

EFFECT: proposed is a pulse safety device.

1 cl, 6 dwg