An insulator structure for protecting vacuum tubes

Abstract

The invention discloses an insulator structure for protecting a vacuum tube. The insulator structure comprises a lower flange, a vacuum tube, an epoxy resin core tube, an upper flange, a sealing ring,a pressing ring, insulating sheds and silicone rubber; the exterior of the epoxy resin core tube is coated with the insulating sheds; two ends of the epoxy resin core tube are respectively sealed andglued with the upper flange and the lower flange; the vacuum tube is installed in the middle of the inner cavity of the epoxy resin core tube, and is fixed to the upper flange through the pressing ring; the sealing ring matched with the inner wall of the epoxy resin core tube is installed between the vacuum tube and the upper flange in a pressed manner; the silicone rubber is poured in an annularcavity between the epoxy resin core tube, the vacuum tube and the sealing ring; and the above components jointly constitute the insulator structure. The insulator structure of the invention has the advantages of simple and scientific structure, prominent techniques and high economical efficiency. With the sealing ring of an ingenious structure adopted, the force bearing characteristics of the vacuum tube can be changed; and the constant-temperature casting process of the silicone rubber realized, the use environment of the vacuum tube can be greatly improved, and a protection function can berealized.

Description

technical field [0001] The invention relates to a high-voltage electrical appliance and a high-voltage insulating device, in particular to an insulator structure for protecting a vacuum tube. Background technique [0002] In the field of 25kV main line railways, whether it is a locomotive or an EMU, the vacuum circuit breaker is an indispensable main switch of the high-voltage system, and is also an important executive component of the locomotive or EMU vehicle control and protection logic. The basic function of disconnection, and at the same time play an important role in the protection of vehicle equipment. [0003] At present, the insulation performance between the high-voltage poles of vacuum circuit breakers is realized and guaranteed by vacuum tubes in the form of vacuum media. Therefore, the application performance of vacuum tubes directly affects the product stability of vacuum circuit breakers, which in turn affects the complete vehicle of locomotives or EMUs. safe...

AI Technical Summary

Problems solved by technology

The commonly used technical method nowadays is to directly pour silicone rubber between the vacuum tube and the insulator to solve the problem of external high-voltage insulation between the poles of vacuum circuit breakers. The stress is within the tolerable range of the vacuum tube, but it has high requirements on the performance of the vacuum tube, and at the same time, it also poses a certain risk of failure for its long-term application reliability

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