A test device and test method for the working ability of mixed explosives

Abstract

The invention discloses a device and method for testing the power capability of composite explosives. The device for testing the power capability of the composite explosives is composed of winches, supports, support supporting rods, bearing bases, rotary shafts, swing arms, pendulum bobs, pendulum bob protruding teeth, a one-way limiter and angulometers. Before a test, explosive samples to be tested are prepared through special pressing molds, the samples to be tested are placed in inner cavities of the pendulum bobs and detonated through detonators, after detonation, the two pendulum bobs swing circumferentially around the rotary shafts under the limitation of the swing arms, the pendulum bobs are controlled by the one-way limiter and the pendulum bob protruding teeth to swing to the highest point and then stay still, the angulometers are used for measuring the swing angles of the pendulum bobs, and the power capability of the composite explosives after detonation is calculated and measured through the swing angles of the two pendulum bobs. According to the device and method, the improvement is made on the basis of a traditional ballistic trajectory mortar method, the conversion efficiency for converting chemical energy into mechanical energy of detonation can be improved through the two-pendulum-bob structure, and therefore the test result and the quantitative expression of the power capability of the composite explosives are more accurate.

Description

technical field [0001] The invention relates to a device for testing the working ability of mixed explosives and a testing method thereof, which are mainly used for evaluating the working ability of mixed explosives. Background technique [0002] With the continuous development of the formulation design technology of mixed explosives, the formulations of mixed explosives containing high inert components and a large amount of metal powder such as polymer bonded explosives and flexible explosives are becoming more and more common and popular. GJB772A-97 stipulates the ballistic mortar method, a common method for evaluating the working ability of high polymer bonded explosives and flexible explosives in the case of small charge. However, with the continuous deepening of the research and understanding of mixed explosives, the ballistic mortar method has been unable to apply to the performance test of mixed explosive formulations containing inert components and a large amount of ...

AI Technical Summary

Problems solved by technology

However, with the continuous deepening of the research and understanding of mixed explosives, the ballistic mortar method is no longer suitable for the performance test of mixed explosive formulations containing inert components and a large amount of metal powder.

[0003] The traditional ballistic mortar method is a relatively mature standard method for testing the workability of explosives, but it is generally only applicable to ideal explosives

At the same time, this test method has the following disadvantages: (1) this method is not suitable for explosives with large critical diameter and low detonation sensitivity; (2) the expansion ratio of traditional ballistic mortars is 6-10, and for aluminum-containing explosives, due to the explosion products The measured work ability is obviously low due to the small expansion degree; (3) The cooperation between the projectile and the expansion chamber wall of the mortar has a great influence on the work value. Due to the long-term explosion work of the explosive in the expansion chamber, the expansion chamber and the surface of the projectile are produced. Small deformation, gaseous explosion products are easy to leak out from the gap between the projectile and the wall of the expansion chamber, so that the measured work value is low

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