Air curtain sealing dedusting system on fully-mechanized excavating face

Abstract

The invention discloses an air curtain sealing dedusting system on a fully-mechanized excavating face, comprising a fully-mechanized roadheader body. The fully-mechanized roadheader body is provided with an air curtain generating device; the air curtain generating device is positioned between an excavating head and a driver of the fully-mechanized roadheader body and can spray air flows to the left side and the right side of the fully-mechanized roadheader body in an upright upward direction so as to form a closed air curtain perpendicular to the excavating direction of a fully-mechanized roadheader; a closed space used for accommodating dust generated when the fully-mechanized roadheader body excavates is formed by the closed air curtain and the excavating face of the fully-mechanized roadheader body; and the fully-mechanized roadheader body is also provided with a dedusting device used for absorbing the dust inside the closed space. By arranging the ari curtain generating device on and the dedusting device on the fully-mechanized roadheader to effectively seal the dust in a space with unattended operation, the invention enhances the dust absorption efficiency of the dust positioned on the excavating head, reduces the influence on a visual line of an operator and enhances the operation safety because the operator can clearly view evacavating.

Description

technical field [0001] The invention relates to the field of dust removal for fully mechanized excavation machines in coal mine excavation working faces, in particular to an air curtain closed dust removal system for mechanized excavation faces. Background technique [0002] With the continuous improvement of the comprehensive mechanization degree of the production site of the excavation working face, the dust production of the production site has also increased sharply. According to actual measurements, without any dust prevention measures, the dust concentration at the head of the fully mechanized mining face is 1200-1500mg / m 3 , individual up to 3000mg / m 3 about. The existence of a large amount of dust not only pollutes the environment and endangers the physical and mental health of operators, but also seriously affects the safe production of mines because coal dust is explosive. [0003] The traditional dust prevention of fully mechanized working face mainly adopts t...

AI Technical Summary

Problems solved by technology

The structure of the dust curtain and dust sealing device is complex, and it is easy to be scratched and deformed by the roadway, which affects the driver's sight and work space, hinders the operator from walking and working, and is troublesome to operate and maintain. The air curtain based on the Coanda effect Airflow is ejected from one side to form an air curtain, but it is difficult to form an air curtain for the entire section of the roadway, and it cannot well isolate the head-on dust from the driver of the roadheader

The existing dust collection and dust removal technology mainly uses the hydraulic dust removal fan of the fully mechanized excavator and the dust extraction and purification system of the dust collector. Due to the unreasonable design of the existing dust suction port, most of them only suck the dust from the front of the fully mechanized excavator. There is less dust suction outside the front of the fully mechanized excavator, resulting in unsatisfactory dust suction effect on the head

Most of the existing dust removal fans are not equipped with silencer devices, and the structure of the installation of silencer devices is relatively complicated, difficult to maintain, and the failure rate is high, resulting in high noise in the excavation face, which seriously affects the physical and mental health of the field workers, and brings a negative impact on production. A serious safety hazard has come, which has affected the construction quality of the excavation head-on

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