Device for testing explosion characteristic parameters of combustible gas ignited by hot dust under laser irradiation

Abstract

The invention belongs to the field of coal mine underground gas and coal dust explosion research, and particularly relates to a device and a method for testing explosion characteristic parameters of combustible gas detonated by hot dust under non-contact laser irradiation. The device comprises a semiconductor continuous wave laser, an infrared thermometer and an explosion container, windows sealedby quartz glass are formed in two side walls of the explosion container; a dust bracket is arranged in the explosion container; a groove for placing dust is formed in the dust bracket; a preformed hole is formed in the explosion container; a pressure sensor, a vacuum meter, a vacuum pump, an inflation valve and a pressure reducing valve are arranged in the preformed hole; sealing means are adopted for sealing, the explosion container is also provided with a glass window; laser of the semiconductor continuous wave laser and the infrared thermometer irradiates the center of dust through the laser coaxial system, the high-speed schlieren camera systems are arranged on the two sides of the explosion container, and the semiconductor continuous wave laser, the infrared thermometer, the high-speed schlieren camera systems, the synchronous triggering system and the pressure sensor are connected with the computer control center.

Description

technical field [0001] The invention belongs to the research field of underground gas and coal dust explosions in coal mines, in particular to a testing device for characteristic parameters of combustible gas explosions ignited by hot dust under laser irradiation. Background technique [0002] Gas and coal dust explosions are the main disasters that threaten underground safety. The more harmful dust explosion accidents caused by the hoisting of deposited dust caused by gas explosions are common underground explosions. Therefore, gas monitoring and control is an effective means to prevent accidents. With the development of optical technology and monitoring technology, fiber optic gas sensors have gradually replaced traditional monitoring methods such as catalytic combustion sensors due to their advantages of fast response and high precision. However, when the optical fiber is damaged or coal dust accumulates at the tip of the optical fiber, due to the strong heat absorption c...

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Problems solved by technology

[0004] In order to solve the problem that the existing test device cannot accurately and synchronously test the process of hot dust detonating gas and the key parameters of the explosion, the present invention provides a test device for the characteristic parameters of hot dust igniting combustible gas explosion under laser irradiation

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