AUTOMATIC EMERGENCY CLOSING OF THE CRANE OF THE GATE OF THE GAS PIPE Russian patent published in 2017 - IPC F16K17/34 

FIELD: construction.

SUBSTANCE: machine contains a crane control system that includes a pneumatic actuator, a pressure gauge and a pneumatic cylinder housed in the body with a sensing element, a gas bypass element and a throttle assembly. The pneumatic cylinder is made in the form of a piston with an annular groove and is divided into two working cavities. One cavity of the pneumatic cylinder is connected with the gas pipeline, and the second - with the pressure comparison cavity formed inside the monolithic metal case into which the air cylinder is placed. The gas bypass element is made in the form of a single central through-hole of the piston in which a throttle assembly is mounted in the hub on the side of the cavity communicating with the gas line. The latter is executed in the form of successively coaxially installed two chokes, one of which is made in the form of a constant-section choke and faces the outer end of the piston, and the second is a slotted conical choke.

EFFECT: increase of reliability due to exclusion of false alarm of the device with simplification of design and reduction of overall dimensions and weight.

5 cl, 4 dwg