A hydraulic support column self-pressurization system with a hydraulic booster
A technology of hydraulic support columns and hydraulic boosters, which is applied in the direction of pillars/supports, fluid pressure converters, mining equipment, etc., can solve problems such as uneven pressure distribution and insufficient initial support force of hydraulic supports, and achieve simplification of connecting pipelines , meet the requirements of continuous automatic supercharging, the effect of small size
Active Publication Date: 2016-02-10
ANHUI UNIV OF SCI & TECH
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Problems solved by technology
The hydraulic pressure of the coal mine underground hydraulic pump station is generally 31.5MPa. After the pipeline loss, the pressure in many occasions can no longer meet the requirements. There are problems such as insufficient initial support force and uneven pressure distribution
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[0011] exist figure 1 Among them, the hydraulic booster includes a single-acting booster cylinder 201 , a hydraulically controlled reversing valve 202 , a first check valve 203 , a second check valve 204 , and a first hydraulically controlled check valve 205 . Emulsion P 0 Divided into two routes, the first route directly reaches the output port P of the hydraulic booster from the first hydraulic control check valve 205 2 , the second route flows to the C cavity of the single-acting booster cylinder 201 through the first one-way valve 203, and the small piston 206 of the single-acting booster cylinder 201 moves to the right together with the large piston 207 under the action of the emulsion, and the single-acting booster The emulsion in cavity A of the cylinder 201 flows to the B cavity of the single-acting pressurized cylinder 201 through the hydraulic control reversing valve 202, and through the oil outlet P 1 Oil return, when the small piston 206 moves to the right to con...
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The invention relates to a hydraulic support stand column self-service pressurizing system comprising a hydraulic pressurizer. The hydraulic support stand column self-service pressurizing system comprises a main reversing valve, a stand column, the hydraulic pressurizer, a one-way valve, a safe valve, an oil pipe and a hydraulic control one-way valve. When the hydraulic support stand column self-service pressurizing system is lifted, part of emulsified liquid enters a cavity C of a single-action pressure cylinder through the main reversing valve to push a large piston and a small piston to the terminal point and finish the pressurizing preparing work, and the other part of the emulsified liquid enters a stand column piston cavity respectively through the one-way valve and the hydraulic control one-way valve to carry out setting fluid supplement. When a hydraulic support top beam makes contact with a top plate, the pressure of liquid in the stand column piston cavity rises; when the pressure rises to the set pressure of a built-in reversing valve of the hydraulic pressurizer, the built-in reversing valve changes the direction, the emulsified liquid flows towards a cavity A of the single-action pressure cylinder through the built-in reversing valve, a pressurizing piston begins to carry out self-service pressurizing, the high-pressure emulsified liquid flows into the stand column piston cavity to continue to supplement liquid, the purpose of increasing the pressure is achieved, and the problem of the insufficient setting force of the hydraulic support is effectively solved.
Description
technical field [0001] The invention relates to a mine support device, in particular to a self-pressurization system of a hydraulic support column including a hydraulic pressure booster. Background technique [0002] The important reason why the hydraulic support adopts hydraulic technology to realize related actions is that it has a simple structure, small size, and can output high force and high power. The hydraulic pressure of the coal mine underground hydraulic pump station is generally 31.5MPa. After the pipeline loss, the pressure in many occasions can no longer meet the requirements. There are problems such as insufficient initial support force and uneven pressure distribution. [0003] At present, the above-mentioned problems are mainly solved by adding a high-pressure hydraulic station or a booster device. The patent with application number 200710179465.8 proposes a self-pressurization system for mining hydraulic supports to solve the problem of low initial suppor...
Claims
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IPC IPC(8): E21D15/51F15B3/00
Inventor 王鹏彧张国荣叶晓奔
Owner ANHUI UNIV OF SCI & TECH