DRIVE OF AUTOMATIC GAS CHECK VALVE Russian patent published in 2017 - IPC F16K11/20 F16K31/10 

FIELD: oil and gas industry.

SUBSTANCE: automatic check valve (hereinafter referred to as ASCV valve) is part of an automatic gas unit designed to stop the supply of natural gas to the burner of steam or hot water boilers as fuel. The ASCV valve relates to the actuators of boiler process protections. The proposed design of the drive ensures that the valve closes in time of not more than 1 s. After the voltage is supplied, the magnetic starter turns the electromagnet on through its boost unit. The electromagnet armature 37 entrains the second link 36 pivotally connected to the latch 34. The spring 38, located on the guide rod rigidly connected to the armature of the electromagnet, is compressed. The latch 34 is rotated by 90° and thereby closes the pin 35 in the latch socket and thus connects the main lever 29 and the auxiliary lever 30 to each other. The lever 43 of the actuator 44 starts to rise, pulling the auxiliary lever 30, the main lever 29 and the valve stem connected to the main lever 29. The valve opens.

EFFECT: simplification of the device.

16 dwg