Sealed arc extinguishing device capable of bearing high-strength pressure

Abstract

The invention discloses a sealed arc extinguishing device capable of bearing high-strength pressure, which belongs to the technical field of lightning protection and arc extinguishing, and comprises a plastic sleeve, a steel sleeve, a ceramic tube, arc extinguishing insulating liquid, a conductive electrode and sealing silica gel, the conductive electrode is nested in the sealing silica gel, and the sealing silica gel is arranged at two ends of the ceramic tube in a sealing manner; the steel sleeve is fastened on the outer side of the joint of the sealing silica gel and the ceramic tube, the arc extinguishing insulating liquid is arranged in the ceramic tube, and the plastic sleeve is sleeved on the outer side of the steel sleeve and the ceramic tube. The electric arc discharges in the liquid to generate a liquid-electric effect, impact pressure waves are formed, the impact electric arc is immediately cut off when the impact electric arc is just formed, the continuous discharge condition and the reignition condition are damaged by high voltage in the ceramic tube, and after the impact electric arc is cut off, the reignition breakdown time is greatly delayed by more than ten to dozens of microseconds; an arc extinguishing current interrupting mechanism is optimized, generated pressure waves are focused to one point on an arc extinguishing channel, larger pressure is generated at the focus, the interrupting capacity is higher, the structure is simple, and the sealing performance is good.

Description

Technical field [0001] The present invention relates to the technical field of lightning protection interrupter, particularly to a high intensity arc extinguishing device receiving the pressure seal. Background technique [0002] Conventional arc extinguishing apparatus when the lightning struck by lightning, since the quenching process produces a transient high energy impact, the conventional arc extinguishing apparatus may be insufficient airtightness mine, several hundred MPa extinguishing generated high intensity pressure applied to the interrupter tube, mechanical deformation, resulting in the burst arc extinguishing device, arc extinguishing lightning achieved effect is not ideal. [0003] The need to design the sealing insulating liquid quenching structure, since the arc is turned on, will form a great pressure shock wave, if the liquid inside the sealed well, liquid leakage frequently occurs, and therefore, it is necessary to design a receiving the sealing means to engage...

AI Technical Summary

Problems solved by technology

[0002] When the existing arc extinguishing and lightning protection device is struck by lightning, because the arc extinguishing process will produce a transient high-energy impact, the existing arc extinguishing and lightning protection device may not be airtight enough, and the high-intensity of hundreds of megapascals generated by arc extinguishing The pressure acts on the arc extinguishing cylinder, causing mechanical deformation, causing the entire arc extinguishing device to burst, and the effect of arc extinguishing and lightning protection is not ideal

[0003] The arc extinguishing structure sealed by insulating liquid is designed according to the needs. Since a large shock wave pressure will be formed when the arc is conducted, if the internal liquid seal is not good, there will often be liquid leakage. Therefore, it is necessary to design an arc extinguishing structure that can Pressure-resistant seals

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