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Overload electrohydraulic executing mechanism drive valve system with compensation function

An electro-hydraulic actuator and a technology for driving valves, applied in valve details, valve devices, mechanical equipment, etc., can solve the problem that the heavy-duty electro-hydraulic actuator cannot be used to drive the valve system issues of compensation

Active Publication Date: 2015-03-11
SHENYANG NORTHEAST ELECTRIC POWER CONTROL
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  • Abstract
  • Description
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Problems solved by technology

Therefore, the application of CN101709807 is restricted by the spring, and it is generally applicable to light-load electro-hydraulic actuator-driven valve systems (that is, the force output by the drive cylinder is less than 10 tons), and cannot be applied to heavy-duty electro-hydraulic actuator-driven valve systems, that is, it cannot be solved. Compensation Problems of Valve System Driven by Heavy Duty Electro-hydraulic Actuator

Method used

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  • Overload electrohydraulic executing mechanism drive valve system with compensation function

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Embodiment Construction

[0010] Heavy-duty electro-hydraulic actuator drive valve system includes electro-hydraulic actuator and heavy-duty valve 6, electro-hydraulic actuator includes drive cylinder 3 and integrated electro-hydraulic actuator 4, drive cylinder piston rod 31, connecting mechanism 5 and heavy-duty valve The valve rods 61 are connected in turn, and the piston rod drives the valve rod to reciprocate, controlling the opening, closing or position retention of the heavy-duty valve.

[0011] It also includes a compensating cylinder 2 and a spring 1, the piston rod 21 of the compensating cylinder bears on the spring, and the compensating cylinder and the driving cylinder are connected in parallel (the ports of chamber A of the two cylinders are connected, and the ports of chamber B of the two cylinders are connected). The initial pressure value P of the compensation cylinder action can be set by adjusting the spring preload value 0 , specifically, spring preload = initial pressure value × com...

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Abstract

The invention provides an overload electrohydraulic executing mechanism drive valve system with a compensation function, and aims to solve the problem that CN101709807 is constrained by a spring and thus cannot be applied to the overload electrohydraulic executing mechanism drive valve system. The key points are that the system comprises a drive oil cylinder, a compensation oil cylinder and a spring, wherein a piston rod of the drive oil cylinder is connected with a valve rod of an overload valve; a piston rod of the compensation oil cylinder is abutted against the spring; the compensation oil cylinder is connected with the drive oil cylinder in parallel. The system has the positive effects that energy is absorbed, stored and released by the spring and the compensation oil cylinder together, the spring is not a unique involved part, the problem of spring constraint is solved, further the application to the overload electrohydraulic executing mechanism drive valve system is realized, and reliable operation of the overload electrohydraulic executing mechanism drive valve system is guaranteed.

Description

technical field [0001] The invention relates to a valve system driven by an electro-hydraulic actuator, specifically a system for driving a valve by a heavy-duty electro-hydraulic actuator with a compensation function. The heavy-duty electro-hydraulic actuator in the present invention means that the force output by the drive cylinder is greater than 10 tons. Background technique [0002] Electrohydraulic actuator drive valve system includes electrohydraulic actuator and valve, electrohydraulic actuator includes drive cylinder and integrated electrohydraulic actuator (see CN1865746A integrated power source), drive cylinder piston rod is connected with valve stem, piston The stem drives the valve stem to reciprocate, controlling the opening, closing or position retention of the valve. The above-mentioned systems are divided into two types of electro-hydraulic actuator-driven valve systems, heavy-duty and light-duty, according to the size of the load (valve) (that is, the outp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02F15B15/16
CPCF16K31/124
Inventor 刘宝军郑学明刘观华雷利韩芳梁立军
Owner SHENYANG NORTHEAST ELECTRIC POWER CONTROL
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