Flushing preventing valve with single hydraulic prop

Abstract

The invention provides a flushing preventing valve with a single hydraulic prop, and belongs to the technical field of roadway supporting of a coal mine. The flushing preventing valve has a flushing preventing function, can quickly absorb impact energy, and has a function of lifting and lowering the prop, a function of preventing flushing and absorbing energy in a static-pressure and dynamic-pressure manner and a remote control function. The flushing preventing valve comprises a left valve body and a right valve body, wherein a left division plate and a right division plate are arranged in the left valve body and the right valve body; a control valve element is arranged in the left valve body and the right valve body and comprises an ejector rod, a throttling supporting piston, a buffering piston, a guiding body and a spring; a through hole of the left division plate is blocked by the left end of the ejector rod; the right end of the ejector rod is arranged in a through hole of the right division plate; the throttling supporting piston and the buffering piston are respectively arranged on the left side and the right side of the ejector rod; a prop liquid injecting opening is formed in the side wall of the left valve body; the guiding body is arranged in the right valve body and consists of a chassis and a guiding barrel; an ejector pin is arranged on the left end surface of the chassis; a right valve body bonnet is arranged at the right end of the right valve body; and a handle fixing seat is arranged on a pressure-adjusting rotating wheel and is hinged to the handle.

Description

technical field [0001] The invention belongs to the technical field of coal mine roadway support, and relates to a single hydraulic prop anti-scouring valve, which is mainly applied to the single hydraulic prop of deep coal mine rock burst roadways. Background technique [0002] With the increase of my country's energy demand and the continuous increase of mining intensity, the depth of mines is getting deeper and deeper, and mines with a depth of thousands of meters are not uncommon. This type of mine has the following characteristics: 1. The stress of the original rock is large, and the support strength is also required; 2. The surrounding rock of the roadway deforms greatly under high pressure, and the large deformation of the support is required to give way; 3. The roof is broken and the impact is high or impacted As the frequency and intensity of pressure increase, the support is required to have the function of fast energy absorption and anti-shock. The existing hydra...

AI Technical Summary

Problems solved by technology

[0005] In the third case, when the roof is pressed rapidly, the roof settlement speed can reach 200-500mm / s, and the ground impact pressure is even greater, even several times higher.

However, this method adopts a large number of valve bodies, complicated operation and single function.

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