Solid-gas mixed type air cannon suitable for coal seam anti-reflection

Abstract

The invention discloses a solid-gas mixed type air cannon suitable for coal seam anti-reflection, and belongs to the technical field of air cannon, the air cannon comprises an air cannon unit, one side of the air cannon unit is fixedly provided with an air supply unit, the two ends of the air cannon unit are fixedly provided with spraying units, and the upper end of the air cannon unit is fixedly provided with a quantitative sand adding unit; the air cannon unit is filled with resin precoated sand, solid-gas mixing is adopted for jetting, the damage degree to a coal body during jetting is enhanced, meanwhile, continuous openness of coal body gaps can be guaranteed, and the problems that the coal gaps are prone to being closed and holes are difficult to form in a three-soft coal seam are effectively solved; according to the air cannon, automatic filling of resin precoated sand into the air cannon body is facilitated, quantitative feeding is facilitated, alternate use is facilitated through a first air outlet pipe and a second air outlet pipe, replacement of a disposable gasket is facilitated, during replacement, use is not affected, and operation is facilitated.

Description

technical field [0001] The invention relates to an air cannon, in particular to a solid-gas mixed air cannon suitable for anti-reflection of coal seams, and belongs to the technical field of air cannons. Background technique [0002] Air cannon is a mechanical device that uses the principle of aerodynamics to complete various technological processes. Most of the current air cannons are injected by adding gas to add gas, and traditional air cannons are filled with gas. When using coal seam anti-reflection, It is mostly used for ash cleaning and other work. In some three-soft coal seams, there are problems that coal seams are easy to close and difficult to form pores. However, traditional air cannons cannot solve these problems and have poor applicability. For use, some current air cannons have also been used in coal seam gas exhaust. For example, the publication number is: CN110985108B, an air cannon used to improve the gas permeability of coal seams, including the main body ...

AI Technical Summary

Problems solved by technology

[0002] The air cannon is a mechanical device that uses the principle of aerodynamics to complete various processes. Most of the current air cannons are injected by adding gas, and the traditional air cannons are filled with gas. When used for anti-reflection of coal seams, It is mostly used for dust removal and other work. In some three-soft coal seams, there are problems that coal seams are easy to close and difficult to form holes. However, traditional air cannons cannot solve these problems, and their applicability is poor. It is not convenient for coal seams to increase permeability. For use, some air cannons are also used in coal seam gas exhaust, such as the publication number: CN110985108B, a kind of air cannon for improving the air permeability of coal seam gas, including the main body of the gas chamber, the structure of the barrel pipe, the cannon Bobbin, muzzle belt, bearing plate, airtight operation window, air inlet, air pipe, weight structure, metal plate, weight suspension rope, string rod, weight block, support plate, string hole, buffer washer and bayonet , by calculating the required pressure in advance, and configuring the weight block of the corresponding quality for the hammer structure inside the gas chamber, the bombardment of the coal seam can be carried out. There is no need for human operation during work, which saves human resources. At the same time, multiple sets of devices can be connected in series Work, significantly improve work efficiency, the metal block is designed as an arc surface structure, which can effectively prevent the side rotation of the metal block, and save materials at the same time. The weight of the hammer can be changed by replacing the heavy block, which is convenient to use

[0003] However, when in use, the coal seam is only impacted by gas, and there are problems of low impact effect and low degree of damage to the coal seam.

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