Wall-attached air duct

Abstract

The invention provides a wall-attached air duct which comprises a duct body. One end of the duct body is an air inlet while the other end of the same is an air outlet, an air retaining plate is arranged in the duct body, and multiple lateral air outlets are arranged on the duct body spirally and all positioned between the air inlet and the air retaining plate. A tunneling working face provided with a press-in-type ventilation system and a foam or spray dedusting system is adopted in a coal mine; by arranging the air retaining plate inside the duct body, when airflow passes through the air retaining plate inside the duct body, a part of the airflow can be diverted to flow towards the lateral air outlets, the airflow becomes spiral airflow through the lateral air outlets which are spirally arranged to blow to the working face at low speed, fresh airflow blows to the working face at low speed to inhibit dust flying, an air curtain is formed around the working face to stop dust-containing airflow of the working face from spreading outwards and effectively prevent gas from gathering, and the air retaining plate can adjust air quantity. The wall-attached air duct is easy to process and convenient to mount.

Description

technical field [0001] The invention relates to underground ventilation technology, in particular to a wall-attached air duct. Background technique [0002] With the development of fully mechanized mining technology, the amount of dust produced in the fully mechanized excavation face has increased sharply, and the working environment has deteriorated. For example, when the roadheader cuts coal, although comprehensive dust prevention measures are used, the dust concentration measured on site is still as high as 250-300mg / m2, which greatly exceeds the standard, threatening the safe production of coal mines and the health of workers at all times. Underground coal mines adopt press-in ventilation system and equipped with foam or spray dedusting system for excavation working face. When the fresh air blows directly to the working face, it is not conducive to the dispersion of gas, and it is easy to cause dust to fly. In order to solve the above problems, the existing technology us...

AI Technical Summary

Problems solved by technology

For example, when the roadheader cuts coal, although comprehensive dust prevention measures are used, the dust concentration measured on the spot is still as high as 250-300mg / m2, which greatly exceeds the standard, threatening the safety of coal mine production and the health of workers at all times.

Underground coal mines adopt press-in ventilation system and equipped with foam or spray dedusting system for excavation working face. When the fresh air blows directly to the working face, it is not conducive to the dispersion of gas, and it is easy to cause dust to fly. In order to solve the above problems, the existing technology usually adopts A pull-out local fan and a rigid frame fan are added to the long-pressure and short-draw ventilation system. The existing wall-attached fan can only be used in conjunction with the long-press and short-draw ventilation system, and does not have the ability to supply staff Breathing fresh air, the air volume cannot be adjusted at will, and the processing and installation are very complicated

Images