Goaf gas detection equipment and gas extraction device thereof

Abstract

The invention relates to goaf gas detection equipment and a gas extraction device thereof. The gas extraction device comprises a far-end sampling gas extraction pipe. A gas extraction end head is arranged at an air inlet of the far-end sampling gas extraction pipe, and the gas extraction end head comprises an inner protective layer and an outer protective layer, wherein the inner protective layerand the outer protective layer are arranged at intervals inside and outside, and the inner protective layer and the outer protective layer are of cylindrical structures. An inner cavity of the inner protective layer communicates with the air inlet, and a plurality of radial air inlet holes penetrating through the corresponding protective layers in the radial direction are formed in the outer peripheral surfaces of the inner protective layer and the outer protective layer. The gas extraction device is provided with a sampling opening not prone to being covered and blocked by rocks, and goaf gasdetection equipment using the gas extraction device is provided.

Description

technical field [0001] The invention relates to goaf gas detection equipment and a gas extraction device thereof in the field of coal mining. Background technique [0002] Mining enterprises, especially coal mines, will produce some toxic and harmful gases during the production process. These gases not only endanger the health of on-site workers, but also some gases will burn and explode when they reach a certain concentration, especially the gas produced during the production process of coal mines. It is the number one killer of coal mines. [0003] Therefore, in order to ensure the safety of construction, it is necessary to detect the gas concentration in the goaf in real time. Chinese patent CN202814767U discloses a "remote sampling and monitoring device for preventing collapse and smashing". Air tubing, gas sampling pump and gas sensor. When in use, set the inlet end of the remote sampling and exhaust pipe at the remote gas collection point, and transport the gas at th...

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Problems solved by technology

[0004] The existing remote sampling and monitoring device is actually a gas extraction device used to extract gas, which has the following problems during use: the remote gas collection point is often in a location prone to collapse such as gobs and blasting sites, However, in the prior art, the orifice of the remote sampling and extraction pipe is small and is easily covered and blocked by collapsed rocks, resulting in sampling failure, and the remote sampling and extraction pipe is also easily damaged by collapsed rocks.

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