Improved compensation capacitor with good sealing performance

By using a combination of copper ring, transparent heat shrink tube and tin filler layer in the compensation capacitor, the problem of insufficient sealing of existing capacitors is solved, effective partitioning of water vapor is achieved, and the life of the capacitor is extended.

CN222672815UActive Publication Date: 2025-03-25CRSC ENG GRP TIANJIN TONGZE RAILWAY ENG EQUIP
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Patent Information

Application Number
CN202421020974.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-11
Publication Date
2025-03-25
Estimated Expiration
2034-05-11

AI Technical Summary

Technical Problem

Due to insufficient sealing properties of the compensation capacitors in existing railway signal systems, rainwater and water vapor enter the capacitor core, damaging the capacitance performance and shortening its life.

Method used

The combination of copper ring, transparent heat shrink tube and tin filling layer is adopted to ensure that the copper ring is well bonded to the epoxy resin, blocking the entry of water vapor, and passing through the metal hard surface of the tin filling layer and the copper ring, preventing water vapor from entering the capacitance core through the cable gap.

Benefits of technology

It effectively blocks the two main paths of water vapor entering the capacitor core, ensures the dryness of the capacitor core, and extends the service life of the capacitor.

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Abstract

The utility model discloses an improved compensation capacitor with good sealing performance, and relates to the technical field of railway signals. The improved compensation capacitor with good sealing performance comprises a capacitor core and a cable conductor body, a cable conductor copper wire is arranged in the cable conductor body, a cable short lead is arranged at the output end of the cable conductor copper wire, a copper ring is arranged at the end of the cable conductor body, and a tin filling layer is arranged in the copper ring. A heat shrink tube is arranged on the outer surfaces of the cable body and the copper ring, the outer surface of the capacitor core is sleeved with a plastic shell, an epoxy resin layer is arranged in the plastic shell, the copper ring and epoxy resin are well bonded through cooperation of the copper ring, the heat shrink tube and the tin filling layer, no gap is generated, rainwater can be blocked outside, and the service life of the capacitor core is prolonged. And the short cable lead and the cable body are connected and filled by tin, so that water vapor cannot enter the capacitor core through a gap of a copper wire of the cable, and two paths for the water vapor to possibly enter the core are cut off.
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