Coal mine gas adsorption control valve

Abstract

The invention relates to coal mine gas adsorption control valves and discloses a control valve used on a device for eliminating gas accumulation in a coal mine roadway through cooperation of the mineventilation coal mine gas prevention technology and the gas extraction coal mine gas prevention technology. By adjusting the open-close degree of four sealing moving doors, gas adsorption can be better conducted according to the situation of gas accumulation. The control valve is characterized in that a fixed cylinder is sleeved with one end of a main ring; at least one adsorption block is arranged on the inner wall of the main ring; the other end of the main ring is sleeved with a fixing ring; four through holes are formed in the fixing ring with equal distances; one ends of four supporting frames are arranged on the outer wall of the main ring with equal distances and located under the four through holes in the fixing ring in a one-to-one correspondence mode; each supporting frame is ofan L-shaped structure; arc-shaped grooves are formed in the other ends of the L-shaped supporting frames; supporting plates are arranged in the arc-shaped grooves in the other ends of the supporting frames and are each of an arc-shaped plate structure; and pneumatic actuators are arranged on the supporting plates, and baffles are arranged at one ends of telescopic rods on the pneumatic actuators.

Description

technical field [0001] The invention relates to a coal mine gas adsorption control valve, which relates to a control valve device used on a physical adsorption device used for coal mine gas prevention and control. The invention belongs to the technical field of coal mine gas prevention and control. In particular, it relates to a control valve used in a device for eliminating gas accumulation in coal mine roadway in cooperation with mine ventilation and gas drainage two types of coal mine gas prevention and control technologies. By adjusting the opening and closing of the four sealed movable doors, the gas adsorption can be better performed according to the gas accumulation. Background technique [0002] Mine ventilation provides oxygen for the coal mine roadway, but there are the following defects in controlling the gas concentration of the coal mine roadway: [0003] (1) The existence of ventilation dead ends leads to gas accumulation; [0004] (2) The coal seam gas emis...

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Problems solved by technology

[0003] (1) The existence of ventilation dead ends leads to gas accumulation;

[0004] (2) The coal seam gas emission per unit time is not a fixed value, and gas outburst is a common risk in mines. If the gas emission is too high for a period of time, the gas content exceeds the standard;

[0005] (3) The ventilation volume of the mine is limited by economy and safety. The ventilation volume is directly proportional to the wind speed and the cross-sectional area of ​​the roadway. If the wind speed is too high, it will affect the safety of people and the normal operation of the equipment. The increase of the cross-sectional area will greatly increase the cost of mine construction, and will also increase the surrounding rock pressure

[0007] (1) The gas drainage operation can only be carried out in the coal seam, and cannot be applied in the roadway, and cannot directly ...

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