Gas discharge tube and overvoltage protection device thereof
A technology of gas discharge tube and protection device, which is applied to gas discharge tube/container, exhaust device, tube structure parts, etc., can solve the problems of short circuit of gas discharge tube, decrease of discharge voltage, damage of gas discharge tube, etc. Easy connection and backflow prevention effect
Pending Publication Date: 2021-10-08
巨民生
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Problems solved by technology
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 discharge, thereby protecting other devices connected in parallel with it; If the breakdown voltage of the gas discharge tube is too high, a large amount of heat will be generated, which will cause the inert gas in the gas discharge tube to expand, increase the pressure, and the discharge voltage will become smaller, and the gas discharge tube will not be able to play a protective role. The gas discharge tube will also be destroyed, eventually causing the gas discharge tube to short circuit or burst, and the gas discharge tube has the problem of unsafe failure
Method used
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[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments.
[0029] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inside", " The orientation or positional relationship indicated by "outside" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, so as to The specific orientation configuration and operation are therefore not to be construed as limitations of...
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The invention belongs to the technical field of voltage protection devices, and particularly relates to a gas discharge tube and an overvoltage protection device thereof. Aiming to solve the problems that if the breakdown voltage of the gas discharge tube is too large, a large amount of heat is generated, inert gas in the gas discharge tube is expanded, the pressure is increased, the discharge voltage is reduced, the gas discharge tube cannot play a protection role, and high temperature and air pressure cause damage of the gas discharge tube, soshort circuit or explosion of the gas discharge tube is caused, and unsafe failure of the gas discharge tube occurs, the gas discharge tube comprises a ceramic shell, the ceramic shell comprises an inner shell, the outer wall of the inner shell is provided with an outer shell, and a ventilation cavity is formed between the inner shell and the outer shell. According to the invention, the failure hole is formed until the temperature reaches the temperature at which the first welding flux is heated and softened, the first welding flux is softened until melting, the gas pressure is too high, the first welding flux sealing plate 3 falls off, and the inert gas A and the inert gas B are quickly discharged due to too high gas pressure.
Description
technical field [0001] The invention relates to the technical field of voltage protection devices, in particular to a gas discharge tube and an overvoltage protection device thereof. Background technique [0002] Lightning strikes will cause surge interference to external power supply lines. In addition to natural lightning strikes, the switching action of substations and other occasions will also introduce surge interference, such as: the interference when the main power system is switched; the same power grid, the interference formed when some small switches near the power receiving equipment bounce; Switching thyristor equipment with resonant lines; various systemic faults such as short circuits and arcing faults between equipment grounding networks or grounding systems. Many power plants will install gas discharge tubes in the equipment circuit. [0003] The gas discharge tube includes an insulating tube body and two conductive electrodes which are sealed and connected...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H01J11/54H01J11/34A62C3/16
CPCH01J11/54H01J11/34A62C3/16
Inventor 巨民生
Owner 巨民生