High pressure gas impact-loading safety performance test method for energetic material

Abstract

The invention relates to a high pressure gas impact-loading safety performance test method for an energetic material in the field of technical detection of explosives and powders, a pyrotechnic composition and a solid-liquid propellant. The method comprises the following test steps: sample preparation, condition selection, detection implementation and data processing. During sample preparation, dosage of liquid and powder samples is 100 mg, and a solid sample is made into a tablet of phi 10 mm*3 mm. Selected equipment includes a high pressure gas generator, a high pressure gas release device and a gas pressure detector. According to the high pressure gas generator, a low-temperature gas generant is adopted for fast combustion so as to provide high pressure gas for the test. The maximum pressure deviation of gas generated by the testing device is + / - 0.25 Mpa. During detection implementation, gas pressure value of a tested sample with 50% explosive probability or the minimum explosive gas pressure value of the tested sample is measured. During data processing, critical explosive gas pressure value is calculated according to the mathematical statistics method. The invention has advantages of simple method, reliable data and good test reproducibility.

Description

technical field [0001] The invention relates to a safety detection technology in the process of production and use of explosives, pyrotechnics, solid-liquid propellants and other energetic materials, specifically a high-pressure gas impact loading safety performance for energetic materials testing method. Background technique [0002] In the process of production and use of energetic materials, there is often the risk of being ignited and detonated by high-pressure gas shock loading. , people have insufficient awareness of its dangers, insufficient attention, and lack of evaluation methods. The safety performance of energetic materials in the process of high-pressure gas shock loading is still lacking in relevant characterization techniques and testing methods. [0003] In the existing technology, to carry out the safety performance appraisal test of high-pressure gas impact loading, first of all, it must be able to provide clean and stable high-pressure gas at room tempera...

AI Technical Summary

Problems solved by technology

[0002] In the process of production and use of energetic materials, there is often the danger of being ignited and detonated by high-pressure gas impact loading. , people have insufficient awareness of its dangers, insufficient attention, and lack of evaluation methods, and there is still a lack of relevant characterization techniques and testing methods for the safety performance of energetic materials in the process of being impacted by high-pressure gas

[0003] In the existing technology, to carry out the safety performance appraisal test of high-pressure gas impact loading, first of all, it must be able to provide normal temperature, clean and stable high-pressure gas. In the industry, air compressors are often used to achieve this. However, domestic air compressors cannot meet the test requirements for high-pressure gas. Pressure value requirements, large imported high-pressure air compressors are bulky and expensive, and are not suitable for routine testing

At present, relatively common high-pressure gas generating devices include "light gas guns" and the like, which use high-speed gunpowder firing devices to provide power and generate high-pressure gas. complex

Now, there is another technology is the solid engine cold supercharging system, the method is: use the imported air compressor unit to inflate the special high-pressure air storage tank, and then adjust the control ball valve to use the gas in the high-pressure air storage tank to simulate the solid engine. Impact loading simulates the ignition and pressure build-up process of the engine by quickly pressurizing the inner cavity of the grain. The main assessment goal is the structural integrity of the grain, and it cannot evaluate the safety performance of the grain during the pressurization process.

Images