Airborne foam dust suppression support for roadheader

Abstract

The invention discloses an onboard foam dust-fall support of a development machine. The onboard foam dust-fall support comprises a support main body (13) which comprises arc-shaped main bodies (2) and is directly arranged on a cutting arm (12) of the development machine, wherein a foam inlet joint (1) is arranged on each arc-shaped main body (2), and a ball nozzle mounting base (3) is fixed at the liquid outlet of each arc-shaped main body (2) by virtue of a fixed flange (4) and bolts (5); two ends of each arc-shaped main body (2) are connected with a connecting block (7) by virtue of a connecting shaft (6) respectively, and the arc-shaped main bodies (2) are connected together by virtue of the connecting blocks (7) and connecting screw rods (8) to form the support main body (13). By adopting the onboard foam dust-fall support disclosed by the invention, the distance between a foam nozzle and a key dust generating area is obviously shortened, the bifurcation phenomena of a foam flow field due to a too long spraying distance is avoided, the foam use level is lowered, and the foam utilization ratio is improved; meanwhile, the onboard foam dust-fall support is convenient to adjust, firm and durable, and suitable for different types of development machine.

Description

technical field [0001] The invention relates to an on-board foam dust-reducing bracket of a roadheader, which belongs to the technical field of coal mine safety, and is especially suitable for foam dust-reduction on a coal mine driving face. Background technique [0002] With the improvement of the degree of mechanization of coal mining in our country, the coal output has been greatly increased, and the dust production of the working face has also doubled. Dust with a particle size of less than 10 microns can be suspended in the mine air for a long time. After being inhaled into the human body, it will stay in the alveoli and cause a series of diseases such as pneumoconiosis. At the same time, because coal is combustible, the specific surface area of ​​coal dust formed by crushing increases by thousands of times, and the reaction rate with oxygen is greatly improved. Studies have shown that a certain concentration of coal dust may explode when it encounters an ignition sourc...

AI Technical Summary

Problems solved by technology

The location of the cutting head of the roadheader is the key area for dust production. The existing foam dust suppression nozzles are all arranged at the front end of the roadheader body. Since the cross section of the roadheader body is rectangular and has a large area, the nozzles are often arranged unevenly. Moreover, the distance between the nozzles is large, so that the foam coverage area is far larger than or even deviates from the key area of ​​dust production, and the foam utilization rate is low. Once the dust escapes from the dust production point, it is more difficult to capture; in addition, the roadheader body and cutting The distance between the head and the head is far away, and the foam flow field will diffuse and bifurcate with the increase of the spray distance, forming cavities and weak surfaces, so that it is difficult to form a tight and effective package and coverage for the cutting head of the roadheader that produces dust.

The above reasons lead to the large amount of foam in the existing foam dust removal equipment, and it is difficult to further improve the dust removal effect; in addition, due to the various types of roadheaders used on the coal mine site, the shape and size of the main body of the roadheader are also different, so that each time the nozzle is used The number of nozzles and the installation positions of the nozzles must be re-measured, designed, and debugged according to different roadheader models, and the installation cycle is long; and because the distance between the nozzles is relatively long, the overall protective cover arranged takes up a lot of space and is difficult to install. Block the line of sight and lack strength, the nozzle is easy to be damaged and loosened due to vibration and collision, the reliability and durability of the existing equipment are not high; the spray angle cannot be adjusted conveniently after the existing nozzle is installed, which is difficult for the debugging of the equipment and maintenance bring great inconvenience

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