Drop hammer instrument for testing impact sensitivity of explosives

Abstract

The invention discloses a drop hammer instrument for testing the impact sensitivity of explosives. The drop hammer instrument comprises a base plate device, a drop hammer, an impact device and an automatic control system for controlling the drop hammer to freely fall, wherein a base device and a support device are sequentially arranged on the base plate device; and the automatic control system comprises a controller, a relay and an electromagnet which is suspended on a cantilever and can attract or release the drop hammer, one end of the controller is connected with the electromagnet, and the other end of the controller is connected with the electromagnet through the relay. The automatic control system controls the release of the drop hammer by controlling on-off of the electromagnet, the drop hammer instrument can be operated in a long distance to avoid the harm of tremendous noise and harmful gases to the human body during explosive impact sensitivity test of the existing drop hammer instrument, and the drop hammer instrument is convenient and safe in operation, thus being widely applicable to the explosive impact test industry.

Description

technical field [0001] The invention relates to a drop weight instrument, in particular to a drop weight instrument for testing the impact sensitivity of explosives. Background technique [0002] For a long time, people have done a lot of experimental and theoretical research on the mechanical detonation of explosives and its mechanism. So far, the accepted theory is the hot theory. On the pattern, but concentrate on the individual small point of explosive pattern, when the temperature of small point reaches the explosion point, it will start to explode from these points. [0003] Based on the theory of hot spots, mechanical collision becomes an important external factor of explosive explosion, so people use this important characteristic to measure the impact sensitivity of explosives. At present, the methods for determining the impact sensitivity of explosives in various countries include the explosion percentage method, the characteristic drop height method and the impact...

AI Technical Summary

Problems solved by technology

[0004] At present, most of the drop hammer instruments used at home and abroad are 80-3 vertical drop hammer instruments or drop hammer instruments with comparable performance. This kind of drop hammer instrument has two important shortcomings: one is the processing requirements for the striking column and guide sleeve Higher, due to the airtightness between the striking column and the guide sleeve, the damage rate of the device during the test is high, which makes the test cost high; the second is that this kind of falling weight instrument uses a hand-operated column retractor, and the tester must stand in each test. Next to the drop hammer, use your hand to pull the release handle on the drop hammer downward, so that the hook connected to the drop hammer will loosen and release the drop hammer, and then hit the column directly below the drop hammer, causing the explosive to explode To determine the impact sensitivity of explosives, as we all know, explosives will explode with harmful factors such as loud noise and chemical waste gas. Long-term testing in this environment will cause great harm to experimenters

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