An experimental device and method for simulating secondary explosion in situ

Abstract

The invention discloses an experiment device and method for simulating in-situ secondary explosion, and is suitable for researches on the in-situ secondary explosion of combustible gas and liquid steam. An explosion pipeline serves as a main body part of the device and consists of a left section and a right section, and a flame arrester is mounted between the two sections; when mixed gas in the pipeline is ignited, the gas in the first pipeline is subjected to initial explosion; under the flame arresting action of the flame arrester, the gas in the second pipeline cannot be exploded; after the initial explosion in the first pipeline, the gas generates relatively high negative pressure, so that part of the gas in the second pipeline is sucked into the first pipeline to be subjected to secondary explosion. Pressure sensors and flame sensors which are mounted at different parts on the pipeline are used for testing change conditions of the pressure and flame signals in the pipeline, and a data acquirer and a computer are used for obtaining a pressure and flame curve for analyzing the signals, so that the development process of the in-situ secondary explosion can be researched deeply, and the mechanism of the in-situ secondary explosion can be further explored.

Description

technical field [0001] The invention relates to the research field of explosion experiments of combustible gas and liquid vapor, in particular to an experimental device and an experimental method for simulating secondary explosions in situ. Background technique [0002] In my country's coal mines, the danger of gas explosions is ubiquitous, and "secondary explosion" is the main form of gas explosion accidents, and the hazards are serious, often resulting in mass casualties, destruction of roadways, destruction of equipment, and even destruction of the entire mine. It caused huge losses to the country and people's lives and properties. [0003] It is known from various documents and reports that experts at home and abroad have done little research on "secondary explosion", among which "in-situ secondary explosion (commonly known as "return wind secondary explosion")" has been At present, there is still a lack of experimental research on the theory put forward, and its formati...

AI Technical Summary

Problems solved by technology

In this technical solution, the primary explosion and the secondary explosion occur at different locations, so it is impossible to study the secondary explosion in situ

In addition, when the experimental device explodes for the second time, the flame breaks through the explosion-proof membrane and rushes out of the test cylinder. Although it is blocked by the anti-shock baffle, it still has high requirements on the operating environment and is dangerous

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