A multi-gap discharge tube module and its packaging structure

Abstract

The invention provides a multi-gap discharging tube module and an encapsulating structure thereof, relating to the technical field of discharging tubes. Two or more metallized ceramic insulating pieces are arranged between two end electrodes; the metallized ceramic insulating pieces and a middle electrode are arranged at certain intervals; inner electrodes are arranged in the metallized ceramic insulating pieces; two through holes are formed in the metallized ceramic insulating pieces; at least one middle end electrode is arranged between the two end electrodes; a left discharging gap group is formed in a left discharging hole between the two end electrodes; and two right discharging gap groups are formed between the two end electrodes and a middle end electrode. The multi-gap discharging tube module consists of a plurality of discharging gaps, and the middle end electrode having the same functions as the end electrodes is used, so that a discharging tube in a full-mold protection mode is realized, an end L, an end N or an end PE can be connected optionally, and three phases of live wires L1, L2 and L3 in an alternating-current power system can be connected; and the multi-gap discharging tube module is a symmetrical multi-gap discharging tube.

Description

technical field [0001] The invention relates to the technical field of discharge tubes, in particular to a multi-gap cermet gas discharge tube module and its packaging structure that can be freely connected to a strong electric power supply system. Background technique [0002] As we all know, multi-gap discharge tubes are used for overvoltage protection, but the fundamental reason why single-gap metal-ceramic gas discharge tubes cannot be directly applied to electronic equipment power supply systems is that metal-ceramic gas discharge tubes are used after overvoltage in high-voltage power supply systems. It cannot be closed by itself, resulting in a short circuit of the power supply so that the system cannot work normally or the single-gap discharge tube itself is damaged. [0003] In order to solve the above problems, an improved multi-gap metal-ceramic gas discharge tube with external contact trigger terminals is disclosed in Patent No. 200920132527.4. The inner electrod...

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Problems solved by technology

[0002] As we all know, multi-gap discharge tubes are used for overvoltage protection, but the fundamental reason why single-gap metal-ceramic gas discharge tubes cannot be directly applied to electronic equipment power supply systems is that metal-ceramic gas discharge tubes are used after overvoltage in high-voltage power supply systems. It cannot be closed by itself, resulting in a short circuit of the power supply, making the system unable to work normally or damaging the single-gap discharge tube itself

[0003] In order to solve the above problems, an improved multi-gap metal-ceramic gas discharge tube with external contact trigger terminals is disclosed in Patent No. 200920132527.4. The inner electrodes are separated, and a trigger terminal is set on the edge of the middle electrode, which is used to connect an external resistor to pre-conduct the discharge unit. Since the peak voltage of the power supply after the pulse overvoltage is lower than the voltage for maintaining the arc discharge between the electrodes, Therefore, it can stop working and extinguish the arc to achieve the purpose of lightning overvoltage discharge. However, the problem of arc discharge is solved in this structure, and the wider application problem is not solved. This structure is described in paragraph 0030 of the specification. Yes, one terminal electrode is connected to the live line or phase line, and the other terminal electrode is connected to the neutral line or grounding protection. This connection method is not suitable for full-mode protection mode. For a three-phase power system, the overvoltage between the two live lines The protection of

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