Induced draft water curtain dust removing device for intercepted coal mining machine

Abstract

The invention discloses an induced draft water curtain dust removing device for an intercepted coal mining machine and belongs to the technical field of dust removing equipment of coal mining machines. On the basis of additionally arranging a special water supply pipeline on a high-pressure water pump, a water magnetizer and a work surface, the induced draft water curtain dust removing devices for the intercepted coal mining machine are arranged on two rocker arms of the coal mining machine for removing dust; and the induced draft water curtain dust removing device, which is arranged on each rocker arm, consists of two hydraulic dust and air absorbing devices adopting long diffusion tubes, two solid conical self-suction sprayers adopting short diffusion tubes and two adjustable sector self-suction sprayers, so that an intercepted long and narrow water curtain belt consisting of an air distribution diversion region, a dust removing regions and a purifying region is formed at the side wall of coal beside the coal mining machine within a wide clean mining range, thereby improving the dust removing effect.

Description

technical field [0001] The invention belongs to the technical field of dust reduction and dust removal equipment for coal shearers. Background technique [0002] Coal cutting by shearer is one of the sources of high dust in coal mines. According to investigations, without dust prevention measures, the dust concentration at the driver of the shearer can reach up to 6000mg / m 3 , Effectively reduce the dust concentration of the coal cut by the excavator, which is of great significance to the safety of coal mine production and the health of workers. [0003] In order to solve the dust problem of coal shearers, various measures have been tested at home and abroad. In foreign countries, there are five aspects of research worth mentioning. First, the United States and Australia have carried out research on downwind spraying with ordinary sprayers and Venturi sprayers, which have played a certain role in solving the dust counterflow of traditional external spraying; second, the Uni...

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Problems solved by technology

[0004] It should be said that the above-mentioned studies have played a certain role in reducing the dust generated by the shearer. However, due to various reasons, the above-mentioned technologies have not been widely used.

In actual use, there are still some problems with the internal and external spraying: one is that the nozzles arranged on the drum are partially or completely buried in the coal when the drum is cut, so that the sprayed jet cannot be atomized, and even the nozzles are blocked; the other is that The spray system inside the roadheader cannot be used normally due to leaking seals and clogged nozzles; the third is that the water pressure in front of the nozzle is low and the atomization effect is poor; the fourth is that the direction and angle of the spray outside the shearer are disordered, the number of nozzles and the structure of the nozzle are unreasonable, and dust is generated Countercurrent; therefore, the dust concentration produced by the shearer is still high, about 1000-2000mg / m 3 Left and right, it is very important to conduct research on the development and research of new technologies for coal mining machine dust reduction, and the social significance is very great

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