Cutting part of an internal spray roadheader

Abstract

The invention discloses a cutting part of an inner spraying type heading machine. The cutting part comprises a cantilever section and a cutting head, wherein the cantilever section is internally provided with a main shaft; the periphery of one end of the cutting head is connected with an inner gear ring through a bolt; one end of the main shaft is matched with the inner gear ring through a planetary gear; the cantilever section comprises a cantilever barrel section and a cantilever shaft section; the cantilever shaft section is provided with a cantilever bearing; a bearing cup cover and a bearing cup, which are connected through a connection bolt and are arranged outside the cantilever bearing; an annular sealed chamber is formed among the bearing cup cover, the bearing cup and the inner wall of the cutting head; the cantilever shaft section is internally provided with a water inlet channel; the top of the bearing cup cover is provided with a water inlet connection channel communicated with the water inlet channel; a water inlet drain plug and a sealed pressing cover are sequentially arranged in the water inlet connection channel; a combined sealing ring sleeves the outer side of the water inlet drain plug; and the sealed pressing cover sleeves the outer side of the water inlet drain plug. With the adoption of the cutting part of the inner spraying type heading machine, provided by the invention, water inlet pressure can be improved to be more than 8Mpa and the most effective dust removing treatment on respiratory dust can be realized; and the injuries on human health by the respiratory dust can be alleviated to the greatest extent.

Description

technical field [0001] The invention relates to a cutting part of a roadheader, in particular to an inner spray type cutting part of a roadheader. Background technique [0002] Usually, the cutting part of the roadheader is composed of five parts: reducer, cantilever section, cutting head, motor and motor frame. There are usually about 12 water holes drilled on the inner spray of the cutting head to realize the dust reduction and cooling of the pick in the inner spray. effect. Due to the structural limitation of the cutting part of the traditional roadheader, the sealing structure of the inner spray waterway is sealed by setting a sealing ring on the main shaft in the cantilever section. Due to the large diameter of the main shaft, the sealing effect of the sealing ring is not good, resulting in The internal spray pressure cannot exceed 3Mpa. However, more than 85% of the dust in the underground roadway is respirable dust (dust particles <0.7μm), and only when the water...

AI Technical Summary

Problems solved by technology

Due to the structural limitation of the cutting part of the traditional roadheader, the sealing structure of the inner spray waterway is sealed by setting a sealing ring on the main shaft in the cantilever section. Due to the large diameter of the main shaft, the sealing effect of the sealing ring is not good, resulting in The internal spray pressure cannot exceed 3Mpa

However, more than 85% of the dust in the underground roadway is respirable dust (dust particles <0.7μm), and only when the water pressure reaches 8Mpa or above, can the effective dust reduction effect be achieved for these respirable dust. The roadheader with the above-mentioned traditional structure If a large amount of respirable dust generated during the operation of the cutting section cannot be effectively treated, it will cause great damage to the health of the on-site staff

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