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Hydraulic control system for straight-stroke gas-liquid linkage actuating mechanism

A hydraulic control system and gas-hydraulic linkage technology, applied in the field of hydraulic control, can solve the problems of not independent energy storage, low safety factor, leakage, etc., and achieve the effect of low manufacturing cost, high safety, and few high-pressure parts

Pending Publication Date: 2020-06-16
SUFA TECH IND CNNC
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  • Abstract
  • Description
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Problems solved by technology

The control principle of several gas-hydraulic linkage devices for quick isolation valves currently popular on the market is to directly store energy by compressing high-pressure gas directly in the oil cylinder, that is, the energy storage is not carried out independently. This principle often makes the hydraulic pressure of the entire actuator The system is all in a high-pressure state, which is easy to cause leakage and has a low safety factor

Method used

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  • Hydraulic control system for straight-stroke gas-liquid linkage actuating mechanism
  • Hydraulic control system for straight-stroke gas-liquid linkage actuating mechanism
  • Hydraulic control system for straight-stroke gas-liquid linkage actuating mechanism

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Embodiment Construction

[0027] The present invention will be further described below by means of the accompanying drawings and specific embodiments.

[0028] Such as figure 1 As shown, the hydraulic system includes a fuel tank 1, four two-way cartridge valves (the first two-way cartridge valve 22, the second two-way cartridge valve 23, the third two-way cartridge valve 24, the fourth two-way cartridge valve Valve 25), two first accumulators (first accumulator 40, second accumulator 41), and associated connected pipelines.

[0029] In order to realize the functions of pressure accumulation, slow switching or fast closing, relevant valves, switches and instruments are installed on the corresponding pipelines.

[0030] Such as figure 2 As shown, the refueling port 2, liquid level switch 3, breather valve 4, liquid level gauge 5, and thermometer 6 are all installed on the fuel tank 1, the refueling port 2 is used to add hydraulic oil to the fuel tank 1, and the liquid level switch 3 is used for low li...

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Abstract

The invention relates to the field of hydraulic control, in particular to a hydraulic control system for a straight-stroke gas-liquid linkage actuating mechanism. The hydraulic control system involvesan oil tank, a ball valve, an oil pump, a filter, a first stop valve, a one-way valve and a second stop valve, wherein the ball valve, the oil pump, the filter, the first stop valve, the one-way valve and the second stop valve are sequentially arranged on an oil outlet pipeline of the oil tank, and the second stop valve and a first safety valve communicate with the oil tank; and two energy accumulators connected in parallel are arranged between the one-way valve and the second stop valve, and a safety valve pressure switch and a pressure gauge are arranged on a branch pipeline between the one-way valve and the first stop valve. According to the system, only one time of pressure accumulation is needed, repeated pressure accumulation is not needed in the subsequent valve opening and closingprocess, and the number of high-pressure parts of the whole system is few, so that the safety is high, and the manufacturing cost is low.

Description

technical field [0001] The invention belongs to the field of hydraulic control, and in particular relates to a hydraulic control system of a straight stroke gas-hydraulic linkage actuator. Background technique [0002] The driving type of the straight-stroke actuator of the quick isolation valve is mainly divided into two types: the medium self-driving type and the gas-hydraulic driving type. The power source of medium self-driven comes from the system rather than from the outside. However, the fast isolation valve of the million-kilowatt pressurized water reactor nuclear power plant is mainly a large-diameter gate valve structure, and the actuator needs to meet the reliable action of the main steam isolation valve with long stroke, fast closing (≤5s), slow opening and slow closing under different working conditions At present, the gas-hydraulic drive type has become the mainstream type of fast isolation valve actuator. The control principle of several gas-hydraulic linkag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K31/12F15B1/033F15B21/08
CPCF15B1/033F15B21/08F16K31/12
Inventor 张为荣祁崇可吴辉潘正邦章良王志敏默静轶柳一琳
Owner SUFA TECH IND CNNC
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