Testing system for critical pressure during thermal explosion of explosives

Abstract

The invention discloses a testing system for critical pressure during thermal explosion of explosives. The testing system comprises a pressure-resistance heating unit, a pressure control unit, a sample loader unit, a decomposed product detection unit and a computer; the pressure-resistance heating unit comprises a single-cavity heating furnace body, wherein a temperature sensor which is connected with the computer is arranged in a furnace cavity, and temperature, temperature rise speed and pressure of the single-cavity heating furnace body are controlled by the computer; the pressure control unit comprises a high-pressure gas cylinder, a pressurizing gas channel pipe, a pressurizing electromagnetic valve, a heat conduction layer extension edge pressurizing pipe, a pressure-releasing gas channel pipe, a pressure-releasing electromagnetic valve, a safety valve gas channel pipe, a safety valve and a pressure sensor; the sample loader unit comprises an L-shaped bracket, a stepping motor, two fixed pulleys, a steel wire rope, a furnace cover, a sample reservoir bracket and a sample reservoir; the decomposed product detection unit comprises an infrared sensor which is arranged in the sample reservoir; and the computer is provided with a data acquisition card, a graphic display control and a data processing unit and can be used for identifying the critical state of thermal decomposition to combustion or explosion and acquiring a critical pressure parameter.

Description

technical field [0001] The invention belongs to the field of propellant and explosive performance testing, and mainly relates to a thermal explosion critical parameter testing device for propellant and explosive, in particular to a thermal explosion critical pressure test system for propellant and explosive. Put the sample in a special explosion-proof furnace, pressurize the sample under isothermal and non-isothermal conditions, and measure the thermal explosion parameters such as critical pressure, critical temperature and critical size when the sample burns or explodes under pressure. Background technique [0002] The final product or intermediate material of explosives will be subjected to the combined action of temperature load and pressure load during the production process, processing process and use process. For the case where the grain size is small or the accumulation size is small, the heat generated by the temperature load and pressure load can be dissipated in ti...

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Problems solved by technology

The critical parameter test device obtained by the existing thermal analysis method test is only suitable for milligram or gram sample

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