Railway contact net carrier cable pay-off pulley device

By introducing a thermal resistance de-icing component and an encircling channel structure into the overhead contact cable laying pulley device, the problems of low-temperature freezing and icing were solved, achieving the effects of autonomous de-icing and extended service life.

CN224279299UActive Publication Date: 2026-05-26XIAN ZHONGHUICHENG RAIL TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
XIAN ZHONGHUICHENG RAIL TECHNOLOGY CO LTD
Filing Date
2025-08-01
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing catenary cable laying devices are prone to freezing in low-temperature environments and lack effective ice-breaking functions, leading to the risk of spring embrittlement and freezing of the catenary cable and wheel groove, making it impossible to reliably extract current under icing conditions.

Method used

A cable-laying pulley device with a thermal resistance de-icing component was designed. By installing a detachable insulating mounting plate and a heated rotating resistance component on the pulley device, the surface of the cable is heated by current to melt the ice. Combined with an encircling channel structure and an adaptive clamping mechanism, the device is ensured to work normally under icing conditions.

Benefits of technology

It enables autonomous de-icing of the pulley device under icing conditions, reducing friction and strand breakage risks, extending the service life of the catenary, and reducing the need for manual intervention.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a railway overhead line system carrier cable paying-off pulley device which comprises an installation hook, a pulley and a pulley block. The thermal resistor deicing assembly is assembled on the rear side of the mounting hook and comprises an insulating mounting plate which is detachably mounted on the rear side of the mounting hook; according to the device, the whole set of device is hung to a cantilever through the detachable support, the carrier cable sequentially penetrates into an encircling channel formed by the first rotating roll shaft, the second rotating roll shaft, the main rotating roll shaft and the third rotating roll shaft, the connecting spring is pressed in a self-adaptive mode along with tension, and groove jumping is avoided; then the power supply body is started, current is transmitted to the heating resistor through the electric wire, the insulating spring flexibly transmits heat to the surface of the iced carrier cable, the ice layer melts while moving, and the friction and strand breakage risks are reduced; and the other group of thermal resistance deicing assemblies which are bisymmetrically arranged synchronously work, so that the left-right stress of the curve section is balanced, the device does not need to be manually knocked in the whole process, the skylight time is shortened, and the service life of a carrier cable is prolonged.
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