Open-circuit failure mode discharge tube with external failure device, and electronic circuit for open-circuit failure mode discharge tube

Abstract

The invention discloses an open-circuit failure mode discharge tube with an external failure device, and an electronic circuit for the open-circuit failure mode discharge tube. The discharge tube comprises a ceramic tube and two end electrodes, wherein the two end electrodes enables the through ports of two ends of the ceramic tube to be closed. The ceramic tube is welded with the end electrodes through soldering flux pieces. The inner surfaces of the two end electrodes form a discharge gap in the ceramic tube. The failure device is disposed outside the ceramic tube, and the failure device islimited on the outer surface of the ceramic tube. An elastic piece extends from the end electrode at one end of the failure device, and is welded with the external end face of the end electrode through employing soldering flux for overcoming an elastic force. When the soldering flux loses efficiency, the elastic piece is separated from the end electrode. The failure device is provided with a pin,and the pin and the other end electrode form two discharge electrodes. The circuit enables an open-circuit failure mode to be changed into an external mode from an end electrode opening mode, therebysolving a problem that gas leakage is liable to happen in the prior art.

Description

technical field [0001] The invention relates to the technical field of discharge tubes, in particular to an open-circuit failure mode discharge tube with an external failure device and an electronic circuit thereof. Background technique [0002] The gas discharge tube is a switch type protection device, usually used as an overvoltage protection device. Currently generally used gas discharge tubes (such as figure 1 shown) is made of an insulating tube body and electrodes sealed at both ends, and the inner cavity is filled with inert gas. When the voltage across the electrodes of the gas discharge tube exceeds the breakdown voltage of the gas, a gap discharge will be caused, and the gas discharge tube will quickly change from a high-resistance state to a low-resistance state, forming a conduction, thereby protecting other devices connected in parallel with it. . But at the same time, if the overvoltage lasts for a long time or occurs frequently, or if there is a long-term o...

AI Technical Summary

Problems solved by technology

However, this solution has the following deficiencies: the use of low-temperature soldering sheets may easily cause high air leakage rate due to processing technology problems in the manufacturing process, resulting in low yield and unstable quality

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