Sealed high-voltage direct-current relay

Abstract

The invention discloses a sealed high-voltage direct-current relay. The sealed high-voltage direct-current relay comprises an insulating cover and a yoke, wherein the yoke extends upwards to form a barrel-shaped yoke fixing part; the insulating cover comprises a top part, the top part extends downwards to form a barrel-shaped insulating cover fixing part, the top part is matched with the insulating cover fixing part so as to form an inverted cup-shaped structure, the yoke is matched with the insulating cover so as to form a cavity for accommodating a movable contact and a static contact, the lower end of the insulating cover fixing part is mutually in screw-thread fit with the yoke fixing part, a first seal ring is arranged on the outer side of the lower end of the insulating cover fixing part or on the lower side of the lower end of the insulating cover fixing part, and the screw-thread fit part of the lower end of the insulating cover fixing part and the yoke fixing part is filled with sealing gluewater. The relay disclosed by the invention has the advantages that the sealing performance is high, the using performance of the relay can be guaranteed and the production cost is reduced.

Description

technical field [0001] The invention relates to a sealed high-voltage direct current relay. Background technique [0002] The high-voltage DC relay includes an insulating cover and a yoke, and the insulating cover and the yoke form a chamber for accommodating a static contact assembly and a moving contact assembly. The static contact assembly includes a lead end and a static contact, and the lead end is fixed to the insulating cover And extend to the outside of the insulating cover, wherein the chamber needs to be evacuated and filled with inert gas. In the current technology, the insulating cover is mostly made of plastic or ceramic material. The insulating cover made of plastic will be used to seal the chamber with a sealant to ensure the airtightness of the chamber and seal the contact between the plastic insulating cover and the yoke. The sealant is used to seal the contact between the lead end and the outside of the insulating cover; the insulating cover made of cerami...

AI Technical Summary

Problems solved by technology

[0003] The method of plastic insulating cover with glue filling and sealing has the advantages of shorter production cycle, lower process requirements, and lower production cost, but the plastic insulating cover will be softened by temperature during long-term use, and the sealant will also be affected by temperature. Burnt yellow, there is a risk of leakage of the inert gas in the chamber; and the sealant will expand and contract due to temperature, and there will be a gap between the sealant and the lead-out end, which will cause an explosion accident

[0004] For relays with ceramic insulating covers, due to the rigidity of the ceramic insulating covers themselves, long-term use will only cause cracks in the ceramic insulating covers, and there will be no risk of fire and explosion. However, relays using ceramic insulating covers need to be repaired The brazing of the yoke, the brazing of the leading end and the ceramic insulating cover, the production cycle is long and the production cost is high

Images