Coal seam drilling ice particle long-distance transport cooling dust collection device and its application method
An ice particle, long-distance technology, used in drill bits, drilling equipment, earth-moving drilling, etc., can solve the problems of frictional heat accumulation, transmission distance limitation, and easy heating of drill bits and drill pipes.
Active Publication Date: 2017-02-15
HENAN POLYTECHNIC UNIV
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Problems solved by technology
For the pneumatic conveying drilling process, the dust on the construction site is serious, and when the drill hole is blocked, the drill bit and drill pipe are prone to heat, and the frictional heat accumulates, which is prone to drilling gas combustion. When the coal is not completely burned, CO is produced. Prone to CO accidents
Drill bit, drill pipe cooling and dust removal are two major technical problems in the drilling construction of outburst coal seams. At present, engineers and technicians usually install atomization devices between the air supply pipe and the drilling rig, and the air flow carries atomized droplets into the drilling cavity. Drilling the bottom of the hole to achieve cooling and dust collection. Due to the limitation of droplet size and transmission distance, the cooling effect of atomized droplets is not ideal
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[0015] Such as Figure 1 ~ Figure 4 As shown, the present invention is a coal seam drilling ice particle long-distance transport cooling dust collection device and its use method, ice particle storage box 3, ice particle injector 4, gas-solid coupling box 5, drill pipe 8, swirl drill bit 11 , the ice particle injector 4 is arranged between the ice particle storage tank 3 and the gas-solid coupling box 5, the gas-solid coupling box 5 is connected to the drill pipe 8 through the drill tail air supply device 7, and the swirl drill bit 11 is installed on the drill pipe 8 front end. Ice particle injector 4 is made up of air motor 401, stirring box 402, ice particle storage tank interface 403, rotary conveying device 404, intermediate pipe 405, conical injector 406 and regulating valve 407, and ice particle injector 4 passes ice particle The storage tank interface 403 is connected with the ice particle storage tank 3 . The gas-solid coupling box 5 is composed of an air pipe joint ...
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The invention discloses a cooling and dust catching device for remotely conveying coal bed drilling ice particles and an application method thereof. The device comprises an ice particle storage box, an ice particle ejector, a gas-solid coupling box, a drill rod and a rotational flow drill bit. The ice particle ejector is installed between the ice particle storage box and the gas-solid coupling box. The gas-solid coupling box is connected with the drill rod through a drill tail air supplier. The rotational flow drill bit is installed at the front end of the drill rod. The application method of the device comprises the steps that a drilling system and the ice particle ejector are started, air enters the gas-solid coupling box along an air pipe to be mixed with the ice particles ejected by the ice particle ejector, the gas-solid phase flow formed by the air and the ice particles enters the drill rod through the drill tail air supplier to arrive at the bottom of a drill hole, and then the gas-solid phase flow is exhausted through a deslagging channel between the drill rod and the drill hole via the rotational flow drill bit. The device is novel in design, the ice particles can be continuously melted in the moving process due to the fact that the ice particles make contact with the drill rod with the temperature of the surface rising and rub with bit cutting particles, the drill rod is cooled, and small coal dust is caught.
Description
technical field [0001] The invention belongs to the technical fields of safe construction of gas drainage drilling in outburst coal seams of coal mines, dust removal and environmental protection, and in particular relates to a device for long-distance transportation of ice particles drilled into coal seams, a cooling and dust collection device and a use method thereof. Background technique [0002] Gas drainage is the prerequisite for safe mining of outburst coal seams. Gas drainage generally includes technical links such as drilling, sealing and connecting holes. Among them, drilling construction is the most critical. The depth of drilling determines the scope and efficiency of gas drainage. The amount of drilling in coal seams is huge, and 0.1m to 0.4m of drilling is required to produce 1 ton of coal. For drilling in outburst coal seams, pneumatic conveying is usually used to convey slag. Compared with hydraulic slag discharge, the slag discharge efficiency is high, and th...
Claims
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IPC IPC(8): E21B10/60E21B21/00
Inventor 王永龙王振锋孙玉宁
Owner HENAN POLYTECHNIC UNIV