Compound-type gas sampling pipe for coal spontaneous combustion detection in goaf and preparation method of pipe

Abstract

The invention discloses a compound-type gas sampling pipe for coal spontaneous combustion detection in a goaf and a preparation method of the pipe. The pipe is characterized in that the pipe comprisesan austenite stainless steel inner sleeve (1) and a hard outer sleeve (2), and the austenite stainless steel inner sleeve (1) is sleeved with the hard outer sleeve (2). Pipes made of two kinds of different materials are adopted and combined into an overall pipe, so that the advantages of two kinds of materials are achieved. By adopting the pipe, indexed gas which is used for coal spontaneous combustion detection and taken out after the pipes are buried in the goaf under a coal mine well can be real and reliable, so that the reality and reliability of the ignition hazard degree of coal spontaneous combustion in the goaf are conveniently and accurately judged according to the indexed gas which is detected by sampling gas, and accurate management measures for treating coal spontaneous combustion and ignition are conveniently adopted; safe production of a coal mine is guaranteed, unnecessary waste of labor and material resources cannot be generated, the production progress cannot be influenced, it is guaranteed that coal mine production is normally and successfully conducted and the economic benefit is improved, and accordingly the production benefit is maximized.

Description

technical field [0001] The invention belongs to the field of coal mine safety detection equipment, and relates to a composite gas sampling pipeline for coal spontaneous combustion detection in goafs. Background technique [0002] "Safety first, prevention first, comprehensive management." is the current safety production policy in our country. Safety lies in prevention, and safety is the foundation of all enterprises. Only with safety can enterprises survive, produce and develop. Safety issues involve all walks of life, involve every family, and affect everyone's heart. In recent years, safety issues have drawn more and more attention from all walks of life, especially coal mine safety production. With the joint efforts of thousands of coal mine workers, coal mine safety has been improved in recent years, but safety management cannot be relaxed for a moment. Most of the coal mines in my country belong to underground mining, the underground mining conditions are complex an...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to provide a composite goaf coal spontaneous combustion detection gas sampling pipeline: two different materials are used to make a combined sleeve, an austenitic stainless steel inner sleeve and an antistatic agent PVC or PE hard outer casing to solve the existing problems in the coal seam spontaneous combustion indicator gas sampling pipeline in the existing coal mine production process: at present, the goaf buried pipe sampling pipeline is mostly used seamless steel pipe and plastic high-pressure pipe, In the process of use, seamless steel pipes are easy to corrode, have the disadvantages of easy to generate sparks when dragged (coal mine production requires strict control of all fire sources or sparks), and are easily crushed by falling rocks. During the use of plastic high-pressure pipes, PE pipes are prone to produce ethylene, and PVC pipes are prone to produce aromatic hydrocarbons, and ethylene and aromatic hydrocarbons are sensitive indicator gases for judging the progress of coal spontaneous combustion in goafs

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