Integrally cast vacuum circuit breaker monopole

Abstract

The invention relates to an integrally cast vacuum circuit breaker monopole, and belongs to the technical field of circuit breakers. The vacuum circuit breaker monopole comprises a cast seal body, an inlet terminal insert, a vacuum arc-extinguishing chamber, an outlet terminal insert, a connecting rod and an insulated pull rod; the inlet terminal insert is fixedly connected with the left end of the vacuum arc-extinguishing chamber, the outlet terminal insert is fixedly connected with the right end of the vacuum arc-extinguishing chamber via the connecting rod, the left end of the insulated pull rod penetrates through the connecting rod and is fixedly connected with the right end of the vacuum arc-extinguishing chamber, the outlet terminal insert is located below the insulated pull rod, and the inlet terminal insert is coaxial with the insulated pull rod; the inlet terminal insert, the vacuum arc-extinguishing chamber, the outlet terminal insert and the connecting rod are all embedded into the cast seal body, the cast seal body is detachably connected with the insulated pull rod, and the cast seal body is integrally cast. The cast seal body is fixedly connected with the inlet terminal insert and the outlet terminal insert in a seal manner, so that the insulating property is good and the sealing property is strong; and the cast seal body is cast by adopting a novel casting process, so that an excellent progress is made on the aspects of impact absorption, breakage resistance, crack spread resistance and the like.

Description

technical field [0001] The invention relates to an integrated casting single-pole vacuum circuit breaker, which belongs to the technical field of circuit breakers. Background technique [0002] At present, with the rapid development of the power grid system, the demand for ZW32 pole-mounted vacuum circuit breakers in rural power grids and distribution networks continues to increase, and the quality requirements for products are also continuously improved: switches require protection grades IP65, switch life requirements are greater than 10,000 times, and external insulation The minimum creepage distance is 372mm, and the temperature rise test current is 1.2 times the rated current. like figure 1 As shown, the ZW32 unipolar produced by most manufacturers in the market is basically completed with a formed epoxy resin insulating sleeve coated with silicone rubber and crimped with a vacuum interrupter. The monopole in the prior art has the following problems: the buffer castin...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a product with good insulation performance, high product sealing performance, good hydrophobicity and high mechanical strength for the defects of poor sealing performance and aging insulation parts of the ZW32 type post-mounted vacuum circuit breaker caused by the current single-pole defects. Unipolar

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