Coal mine negative pressure ventilation device

Abstract

The invention provides a coal mine negative pressure ventilation device consists of a duct. The device comprises the duct. A sluice wall is arranged on the inner end of a single head blind lane. The outer end of the single head blind lane is connected with an air inlet lane. A vice lane is located above the single head blind lane and is connected with the single head blind lane. The vice lane and the single head blind lane are separated by a number of dampers. The lower end of the duct is provided with an air inlet, and the upper end is provided with a return air inlet. The air inlet is fixed in front of the sluice wall. The return air inlet is fixed in the vice lane. The fixed position of the air inlet is lower than the fixed position of the return air inlet. The distance between the air inlet and the sluice wall is 0.3 to 0.6m. The distance between the return air inlet and the damper on the innermost side of the vice lane is 0.3 to 0.5m. The duct diameter of the duct is 4 inches. According to the coal mine negative pressure ventilation device provided by the invention, the duct of 108 to 189mm is arranged between a position 0.3 to 0.6m from the front retention wall or the front sluice door and the nearest damper on the innermost side of the vice lane; air leakage in the middle is prevented; a negative pressure principle is fully used for natural ventilation; the problem of poor ventilation of the single head blind lane is solved; and the return air inlet in the vice lane can pump air in the air inlet lane.

Description

technical field [0001] A coal mine negative pressure ventilation device belongs to the technical field of coal mine underground equipment. Background technique [0002] The water retaining wall or closed sluice gate (ie sluice wall) in the coal mine is often all in the blind alley without ventilation. A blind alley with a single head is an alleyway with a length of more than 6m and no or poor ventilation. The sluice wall is at the inner end of the blind alley, and the sluice wall needs to send people frequently to observe the pressure of the water in the retaining wall or in the sluice gate. Where people work, there must be ventilation conditions for people to breathe. In the prior art, local ventilators are often used for ventilation, which will cause a huge waste of funds and electric energy. [0003] The existing negative-pressure underground ventilation device sets the air inlet at the entrance of the single-headed blind alley, and the sluice wall at the inner end of ...

AI Technical Summary

Problems solved by technology

In the prior art, local ventilators are often used for ventilation, which will cause a huge waste of funds and power energy

[0003] The existing negative pressure underground ventilation device sets the air inlet at the entrance of the single blind alley, and the sluice wall at the inner end of the single blind alley cannot meet the ventilation requirements; the existing negative pressure underground ventilation device will use a longer The pipeline, through the air inlet roadway, will output the air outlet, set it on the ground, and fix it at a higher position

The air outlet pipeline on the ground needs to be perpendicular to the horizontal ground. Because the ventilation route is too long and the pipeline is too circuitous, the ventilation effect is not ideal; the existing air return pipeline is too high above the ground, and it is prone to lodging in bad weather , it needs to be fixed with anti-lodging fixtures; the existing air return opening is exposed upward to the ground, which is prone to blockage