Hydraulic control system of safety stop valve

Abstract

The invention discloses a hydraulic control system of a safety stop valve. According to the disclosed scheme, an energy accumulator, a first fireproof valve, a second fireproof valve, a valve closing control valve, a valve opening control valve, an oil way connected with an upper cavity of an execution oil cylinder, an oil way connected with a lower cavity of the execution oil cylinder and an oil return way connected with an oil tank are included; all the valves are connected to form a valve opening oil way and a valve closing oil way. The two fireproof release valves are arranged in the oil way of the hydraulic system, the fireproof valves are opened in the case of fire, and the oil way is automatically communicated to achieve valve closing; the fireproof release valve can automatically sense the environment temperature when a fire occurs, the valve can be automatically closed no matter an accident site is powered on or powered off, and once the environment reaches the dangerous temperature, the safety is very high. And the system has an emergency turn-off function, the valve opening and closing functions can be recovered by switching oil ways after emergency turn-off, and meanwhile, the fireproof function can be conveniently and quickly recovered.

Description

technical field [0001] The invention belongs to the technical field of electro-hydraulic actuators and pipeline valves, and relates to a hydraulic drive system for safety cut-off valves, which can be applied to the control of tank root safety valves in oil depots and tank farms, and can be automatically activated in emergency situations such as fire and power failure. off. Background technique [0002] The safety shut-off valves such as the tank root valves that control the roots of oil tanks in oil depots and tank farms are open during daily work, and must be closed in case of emergency such as fire or circuit failure. At present, manual gate valves or electric gate valves are mostly used as safety valves for entering and exiting tanks in oil depots and tank farms. Manual gate valves require operators to manually rotate the valve operation handwheel. Valves with larger diameters need to be rotated thousands or even tens of thousands of times. Handwheel, the speed is very s...

AI Technical Summary

Problems solved by technology

At present, manual gate valves or electric gate valves are mostly used as safety valves for entering and exiting tanks in oil depots and tank farms. Manual gate valves require operators to manually rotate the valve operation handwheel. Valves with larger diameters need to be rotated thousands or even tens of thousands of times. Handwheel, the speed is very slow, and the fire situation poses a great threat to the life safety of the operator

[0003] The electric gate valve cannot operate even when the power supply fails

Therefore, manual and electric gate valves cannot meet the rapid shutdown in emergency situations such as accidents and fires, and do not meet the national safety requirements for emergency shutdown of can roots in dangerous places.

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