Hydraulic control system for safe rapid opening or closing of valve

By designing a hydraulic control system for safe and fast opening or closing of the valve, the combination of cartridge valves and reversing valves is used to achieve rapid movement of the hydraulic cylinder piston rod, solving the safety problems of hydraulic drive valves in emergency situations, and ensuring the safety of the system is safe and reliable.

WO2025148241A1 Publication Date: 2025-07-17WISDRI ENG & RES INC LTD
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Patent Information

Application Number
PCT/CN2024/099535
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-01-08
Filing Date
2024-06-17
Publication Date
2025-07-17

AI Technical Summary

Technical Problem

Existing hydraulic drive valves are difficult to achieve safe quick opening or closing in emergency situations, resulting in possible production safety accidents.

Method used

Design a hydraulic control system for safe and fast opening or closing of the valve, including hydraulic cylinder, pressure oil pipe, oil return pipe, oil drain pipe, rapid oil return pipe and valve table. It is equipped with a three-position four-way reversing valve, a two-way hydraulic lock, a first- and second-position four-way reversing valve and energy accumulator. Through the combination of cartridge valves and reversing valves, the rapid discharge of pressure oil and the rapid oil supply of the energy accumulator are achieved, ensuring the rapid movement of the valve.

Benefits of technology

It realizes the safe, reliable, quick opening or quick closing of the valve, ensuring that the system does not relieve pressure in extreme cases, provides safety protection, and maintains the pressure in the pressure oil pipe under normal circumstances, ensuring normal operation of the equipment.

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Abstract

Disclosed is a hydraulic control system for safe rapid opening or closing of a valve. The hydraulic control system comprises a hydraulic cylinder (71), a pressure oil line (141), an oil return line (151), an oil drain line (161), a quick oil return line (171) and a valve manifold (181), wherein the inside of the valve manifold is provided with a three-position four-way directional control valve (51), a bidirectional hydraulic lock (31), a first two-position four-way directional control valve (61) and an energy accumulator (191); a first cartridge valve (101) is connected between the oil drain line and a rod cavity of the hydraulic cylinder, and a pilot port of the first cartridge valve is connected to a port A of the first two-position four-way valve; an oil inlet of the energy accumulator is connected to each of the pressure oil line and the oil return line, a first check valve (81) is connected between the oil inlet of the energy accumulator and the pressure oil line, and a second cartridge valve (102) is connected between the first check valve and the energy accumulator; and the second cartridge valve is connected to a rodless cavity of the hydraulic cylinder, and a pilot port of the second cartridge valve is connected to the port A of the first two-position four-way directional control valve. The hydraulic control system for safe rapid opening or closing of a valve allows for safe rapid opening or closing of a valve.
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