Test device and method for flammable gas explosion propagation process of sewage pipe network

Abstract

The invention discloses a test device and method for a flammable gas explosion propagation process of a sewage pipe network. The device comprises a vertical pipeline system and a horizontal pipeline system. One side of a vertical pipeline is provided with an ignition rod and the other side is equipped with a pair of pressure / temperature sensors. An explosion venting / blind plate is installed on thetop of the vertical pipe. The horizontal pipeline and the vertical pipeline form closed limited space. One pair of pressure / temperature sensors is installed at the center of the top of each horizontal pipeline respectively. The vertical pipeline is made of a transparent explosion-proof glass material; the horizontal pipeline is provided with a circular transparent window; and high-speed cameras are arranged outsides of parts corresponding to the transparent explosion-proof glass and the circular transparent window. The horizontal pipeline is connected with a pressure gauge, a water inlet / discharge port, a vacuum pump and a combustible gas cylinder. Therefore, the sewage pipe network gas explosion experiments including a vertical well explosion venting experiment and a vertical shaft non-explosion venting experiment can be carried out by simulating the real scene; and the process monitoring of the explosion pressure, temperature and flame can be realized.

Description

technical field [0001] The invention relates to a combustible gas explosion testing technology of an urban sewage pipe network, in particular to a testing device and method for a combustible gas explosion propagation process of a sewage pipe network. Background technique [0002] The research on gas explosion is particularly important in the field of safety engineering, and the research on gas explosion risk assessment and safety protection for urban public infrastructure has gradually attracted attention. At present, combustible gas explosions in confined spaces are research hotspots. Urban sewage pipe network is a typical confined space. Combustible gas explosion accidents in urban sewage pipe network have a great impact on the personal safety of the public. [0003] In the prior art, researchers have carried out research on the explosion process of combustible gas in pipelines at different scales and without water storage. [0004] However, the urban sewage pipe network...

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Problems solved by technology

The existence of well covers (explosion venting surfaces), water storage conditions, vertical wells and horizontal wells of different scales are fundamentally different from the pipelines in previous studies, and there is no comparison with real scenarios for combustible gas explosions in urban sewage pipe networks. The testing devices and methods restrict the development of research work on the propagation process of combustible gas explosions in the urban sewage pipe network, disaster-causing mechanism and safety protection.

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