Nitrogen injection device and nitrogen injection method thereof

A technology of nitrogen injection and nitrogen injection pipe, which is used in safety devices, earthwork drilling, dust prevention, etc., can solve the problems of large amount of nitrogen injection, high cost, waste of materials, etc., achieve good nitrogen injection effect, reduce input cost, The effect of strong mobility

Active Publication Date: 2013-08-07
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Abstract
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Problems solved by technology

[0007] The present invention provides a nitrogen injection device to solve the problems in the prior art that the nitrogen injection point is discontinuous, the am

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  • Nitrogen injection device and nitrogen injection method thereof
  • Nitrogen injection device and nitrogen injection method thereof
  • Nitrogen injection device and nitrogen injection method thereof

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Embodiment Construction

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0016] In a nitrogen injection device provided in an embodiment of the present invention, such as figure 1 As shown, it includes a nitrogen injection pipe 11, a reducer 12 and a bellows 13. The reducer 12 is fixed on the base of the shearer end bracket, and forms the end of a round pipe at the front end of the nitrogen injection pipe 11. The head is connected to the first end of the hollow double shaft 14 of the reducer through a chuck 15, the second end of the hol...

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Abstract

The invention provides a nitrogen injection device and a nitrogen injection method thereof and belongs to the technical field of safe fire preventing and extinguishing of mines. The nitrogen injection device comprises a nitrogen injection tube, a reducer and a bellows, wherein the reducer is fixed on a base of a support at the end of a coal cutter, the end of a round tube at the frontmost end and composing the nitrogen injection tube is connected with first ends of hollow double shafts of the reducer through chucks, second ends of the hollow double shafts of the reducer are connected with the first end of the bellows, the second end of the bellows is connected with a nitrogen source, and the bellows is installed on a guide rail of the coal cutter. The nitrogen injection device enables nitrogen injection points to be always kept at the optimum position of a goaf, the nitrogen injection points are continuous in space, the nitrogen injection effect is good, the problem of waste caused by the fact that the nitrogen injection tube is discarded in the goaf and materials cannot be recovered can be solved, and the nitrogen injection device is strong in mobility and reduces investment cost.

Description

technical field [0001] The invention relates to a nitrogen injection device for underground gobs in coal mines and a method for realizing continuous nitrogen injection, and belongs to the technical field of mine safety fire prevention and extinguishing. Background technique [0002] At present, among all key state-owned coal mines in my country, mines with coal spontaneous combustion account for 56% of the total number of mines, and fires caused by coal spontaneous combustion account for 90-94% of the total number of mine fires. Fires caused by spontaneous combustion of coal not only seriously endanger the safe production of coal mines, but also cause a large amount of coal resource loss, underground cavities, broken rocks, underground pollution and water loss; Cracks and subsidence are formed on the ground, and the soil is deserted, releasing a large amount of poisonous and harmful gases, which seriously threaten the safety of people's lives. Nitrogen injection to prevent ...

Claims

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Application Information

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IPC IPC(8): E21F5/00
Inventor 朱红青李峰谭波
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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