Atomization device for air compression drilling of coal mine

Abstract

The invention relates to an atomization device for air compression drilling of a coal mine. At the present stage, the underground gas drainage drilling of the coal mine generally adopts air compression drilling, and compressed air serves as a cyclic medium, so coal powder at the bottom of a hole can be discharged effectively; however, severe dust can be formed at an orifice, so construction process is influenced, and the physical health of field staff is also influenced. The atomization device for the air compression drilling of the coal mine comprises a drainage suction tube with a control valve, a drainage drilling rod, a reducing sliding block, a spiral short joint, a constraint short joint and a transitional drilling rod, wherein the spiral short joint is sleeved outside the constraint short joint; two ends of the constraint short joint are connected with the drainage drilling rod and the transitional drilling rod respectively; the reducing sliding block is arranged on an internal wall of the constraint short joint; and the drainage suction tube with the control valve is arranged at one end of the drainage drilling rod and extends into an internal cavity of the atomization device. The atomization device can atomize air which enters the bottom of the hole; and after the atomized air enters the bottom of the hole, small coal powder can be agglomerated into larger particles which are easy to discharge from the bottom of the hole.

Description

technical field [0001] The invention relates to an atomization device for coal mine air pressure drilling. Background technique [0002] At present, the underground gas drainage drilling in coal mines generally adopts air pressure drilling, using compressed air as the circulating medium, which can effectively discharge the coal powder at the bottom of the hole, but will form serious dust at the hole, which not only affects the construction progress, but also affected the health of on-site staff, so at present, the dust problem has become an urgent problem to be solved in underground drilling. [0003] In daily life, fog can make tiny dust clumping together to form larger particles, which settle under the action of gravity, which obviously reduces dust. However, it is not easy to control the water that creates fog during air pressure drilling in coal mines. A little carelessness is likely to cause the collapse of the borehole due to too much water added, resulting in acciden...

AI Technical Summary

Problems solved by technology

However, it is not easy to control the water that creates fog when drilling under air pressure in coal mines. A little carelessness may cause the collapse of the borehole due to too much water added, resulting in accidents in the hole such as bogging of the drill.

Until now, there has not been a good atomization device that works well with air pressure drilling to effectively solve the problem of dust at the bottom of the hole

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