A high-efficiency electrostatic protection component of disc type tvs tube for bridge wire electric detonator

Abstract

The invention relates to a disc-type TVS tube high-efficiency electrostatic protection assembly for a bridge-wire type electric detonator, which comprises a disc-shaped PCB circuit board and two TVS tube electrostatic protection electronic devices. One of the TVS tubes is connected in parallel with the pin-pin firing circuit through the circuit board, and the other TVS tube is connected in parallel with the pin-shell firing circuit through the circuit board. Two zigzag discharge electrodes are arranged on the reverse side of the PCB circuit board, and form the air gap electrostatic discharge channel between the feet and the shell with the inner wall of the metal tube shell. . The electrostatic protection component of the present invention can protect both the foot-shell and the foot-foot to achieve an anti-static effect of more than 50kV on the human body, and can withstand multiple impacts of electrostatic discharge without any performance change.

Description

Technical field [0001] The patent of the invention belongs to the electrostatic protection electronic device of electric explosives, especially the high-efficiency electrostatic protection electronic device suitable for the sensitive bridge wire type electric detonator. Background technique [0002] The existing bridge wire type industrial electric detonator is easy to be affected by static electricity and stray current during use, resulting in performance changes or accidental ignition. In the production, assembly, storage, transportation, use and maintenance of pyrotechnics and weapon systems, the hazards of electrostatic discharge are widespread. Static electricity has the characteristics of high voltage, low energy, and high transient. The coupling of electrostatic discharge energy may be possible It affects the ignition performance (sensitivity, ignition time, etc.) and safety performance (safe current, etc.) of electric explosives, and even causes misfire or accidental igni...

AI Technical Summary

Problems solved by technology

[0004] The anti-static structure disclosed in Chinese patent CN201210540239.9 is to insert a horizontal discharge metal connector at the rear end of the detonator. The size is relatively large, and it is not suitable for long legs or small-sized detonators.

The connection between the metal connector and the leg wire of the detonator is connected by crimping, which may easily cause the electrode to fall off and the protection circuit to be disconnected, making the electrostatic protection circuit invalid

The external plug-in discharge metal connector increases the difficulty of the detonator manufacturing process. If the detonator is inserted after the detonator is formed, it will easily cause accidental ignition and cause danger. However, the external insertion of the detonator before the detonator is formed will bring great inconvenience and trouble to the detonator manufacturing process. At the same time, the external insertion of the horizontal discharge metal connector will limit the use of the detonator. In the case of high overload of the missile, the external large horizontal circuit board is easy to fall off and pose a danger to the system. When there is no extra space for use, the external large horizontal circuit board is inserted. board will bring danger to the entire system

And the patent does not explain the protective effect of static electricity

[0005] The anti-static structure disclosed in Chinese patent CN201220055188.6 is only used in the semiconductor bridge detonator, and only one sharp corner discharge is used to protect the foot-shell static electricity, because the product will pass at least 3 to 5 people during the transportation and assembly process Discharging the product may cause melting and deformation of the sawtooth after one discharge, thus losing the electrostatic protection effect, and danger will occur after multiple discharge impacts; at the same time, the patent does not give a protective effect, nor does it propose anti-static protection for multiple times. Shock, more did not raise the size of the product size

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