A piezoresistive electrostatic protection bridge wire electric detonator

Abstract

The invention relates to a piezoresistance type efficient electrostatic protection bridge-wire electric detonator. The bridge-wire electric detonator comprises electrode plugs, bridge wires, ignition powder, detonating powder, high explosive, a reinforcing cap, a detonator shell and a wafer-shaped efficient antistatic protection assembly. The efficient antistatic protection assembly is connected with a detonator double-pin wire circuit through a wafer-shaped electrostatic protection PCB to form a pin-pin electrostatic discharge channel and connected with a shell circuit to form a pin-shell electrostatic discharge channel. The efficient electrostatic protection assembly is provided with a pin-pin electrostatic protection device and a pin-shell electrostatic protection device and further provided with a pin-shell electrostatic discharge channel, namely a pin-shell electrostatic protection dual-guarantee discharge channel, composed of a plurality of sharp-angled air gaps. When piezoresistors are adopted for the electrostatic protection assembly, the pin-shell electrostatic protection effect of resisting 50 kV can be achieved, the pin-pin electrostatic protection effect of resisting 30 kV can be achieved, and repeated impact by electrostatic discharge can be borne by both pin-shell protection and pin-pin protection without any change in performance.

Description

[0001] Technical field [0002] The patent of the present invention belongs to the electric detonator protection technology, in particular to an electric detonator electrostatic protection technology against extreme human body static environment. Background technique [0003] The electric detonator is an important detonating element for the detonation of explosive devices or the detonation of weapons and ammunition in engineering blasting. The glowing bridge wire element is often used as the electrothermal transducer element in the electric detonator. The bridge wire is welded between the ends of the two metal wires of the electric detonator. When the ignition current is passed through, the bridge wire realizes the electrothermal conversion of the electric detonation control signal (ignition current), and the heat generated by the bridge wire generates high temperature, which ignites the explosive powder in contact After the propellant is ignited, the delay charge, the priming...

AI Technical Summary

Problems solved by technology

[0006] 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

[0007] 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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