An internal spray foam dust removal system for a roadheader

Abstract

The invention discloses a heading machine internal foam-spraying dedusting system. The heading machine internal foam-spraying dedusting system comprises a foam preparation system (1), a foam distribution system (2), a foam terminal spraying system, (3) a water pressurizing pipeline (9), and a wind pressurizing pipeline (10); the foam preparation system is fixedly arranged on a machine cover of the heading machine via a permanent magnet lifter (4), and is connected with the foam distribution system via a foam delivery pipe; the foam delivery pipe is arranged on the lower side of a heading machine guard board; the foam distribution system is arranged in a the heading machine cutting arm; and the water pressurizing pipeline and the wind pressurizing pipeline are both connected with the foam preparation system. According to the heading machine internal foam-spraying dedusting system, because of accumulation capacity of foam, continuous covering and accumulation of sprayed foam on cutting picks are realized, operation of the cutting picks in foam is realized, coal and rock mass are moisturized, generation of dust is inhibited, dust is reduced from the sources, dedusting effects are excellent, and water consumption is less; and at the same time, gas can be diluted, the cutting picks are cooled, sparks are eliminated, changing frequency of the cutting picks is reduced, and generation of gas explosion and coal-dust explosion is avoided completely.

Description

technical field [0001] The invention relates to a foam generating device, in particular to a foam spraying dust removal system inside a roadheader, belonging to the field of foam generating devices. Background technique [0002] With the development of mechanized tunneling technology in coal mine underground tunnels, the power of the continuously updated roadheaders is getting higher and higher, the driving strength is getting bigger and bigger, and the dust production is gradually increasing. Rotation, the pick temperature is high, it is easy to rub sparks, induce coal dust and gas explosion, which not only restricts the safe production of coal mines, but also greatly threatens the life and health of workers. [0003] At present, the dust removal methods used in the excavation working face mainly include measures such as ventilation and dust removal, spray dust removal or chemical dust suppression. However, these measures are limited by the defects of the technology itself ...

AI Technical Summary

Problems solved by technology

[0002] With the development of mechanized tunneling technology in coal mine underground tunnels, the power of the continuously updated roadheaders is getting higher and higher, the driving strength is getting bigger and bigger, and the dust production is gradually increasing. Rotation, high pick temperature, easy friction and sparks, induce coal dust and gas explosion, which not only restricts the safe production of coal mines, but also greatly threatens the life and health of workers

[0003] At present, the dust removal methods used in the excavation working face mainly include measures such as ventilation and dust removal, spray dust removal or chemical dust suppression. However, these measures are limited by the defects of the technology itself or the actual situation of the operation point. not strong defect

Among them, spray dust removal has become the most important dust removal method in the excavation process due to its flexible use and easy operation. damage, and the disadvantages of difficulty in controlling the atomization effect; and the spraying inside the roadheader avoids these shortcomings to a large extent, by building the pipeline inside the cutting arm of the roadheader, and placing the nozzle directly The front end is sprayed at the dust source, which has the characteristics of good dust removal effect and low water consumption. At the same time, it can dilute the gas, cool the pick and eliminate sparks. However, it should meet the requirements of atomization. The diameter of the nozzle is usually 1.5-2mm, and the nozzle is easy to block. Moreover, the water supply pipeline inside the cutting arm is extremely unstable due to the high water pressure required for atomization

The traditional chemical dust suppression structure is simple, stable and reliable, but it is far away from the dust source, the dust has spread, the dust suppression effect is poor, and the foam utilization rate is low

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