Explosion limit testing device of combustible gas under high-temperature condition

Abstract

The invention relates to an explosion limit testing device of combustible gas under a high-temperature condition. The device comprises a temperature data collection system, a heating temperature control system, and a supplied gas feeding / gas pumping and purging system. The supplied gas feeding / gas pumping and purging system comprises the following components connected in parallel: a delivering pipe of gas to be detected, an oxygen delivering pipe, an air delivering pipe, and a vacuum pump. The heating temperature control system comprises a round-bottomed flask testing chamber, a heating jacket, a temperature control thermocouple, and a heating furnace. The round-bottomed flask testing chamber is suspended in the heating furnace through an insulation supporting device. The testing device provided by the invention is a semi-closed testing device. A safety valve is provided above the flask, such that pressure can be released in time after explosion occurs, and the flask is prevented from being damaged by detonation pressure. Therefore, the explosion limit of combustible gas under high-temperature condition can be effectively measured, and temperature can be accurately controlled. An upper temperature limit can reach 800 DEG C. Also, the device is convenient to observe, such that testing accuracy is greatly improved.

Description

technical field [0001] The invention relates to an explosion limit test device, in particular to an explosion limit test device for combustible gas under high temperature conditions. Background technique [0002] Combustible gas and air must be uniformly mixed within a certain concentration range to form a premixed gas, which will explode when it encounters a fire source. This concentration range is called the explosion limit, or the explosion concentration limit. The explosion limit of combustible gas is one of the important indicators for judging and evaluating the fire hazard of combustible gas substances. Explosion limit can be used to assess the explosion hazard of combustible gas, as the basis for grading combustible gas and determining its fire hazard category. The wider the range of explosion limit, the greater the risk of combustible gas explosion. [0003] At present, most of the existing high-temperature explosion limit instruments use stainless steel test device...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the existing high-temperature explosion limit instruments use stainless steel test devices, which have the disadvantage of slow heating, and the higher the temperature, the worse the anti-explosion pressure capability of the material; and the temperature measurement range of the existing test devices is generally within 200 °C. Powerless when measuring the high temperature explosion limit of flammable gases

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