A rail end heating device

By installing a contoured intermediate frequency induction heating coil at the furnace opening of the induction heating furnace, the effective matching of the longitudinal heating temperature of the rail and the temperature in the furnace is achieved, solving the problems of low heating efficiency and long heat-affected zone in heat treatment, and improving the service life and smoothness of the rails.

CN113736976BActive Publication Date: 2025-03-28CHINA RAILWAY BAOJI BRIDGE GROUP CO LTD +1
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Patent Information

Application Number
CN202111019069.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-09-01
Publication Date
2025-03-28
Estimated Expiration
2041-09-01

AI Technical Summary

Technical Problem

In the prior art, there are low heating efficiency, too long heat affected zone length and too large soft zone length during the rails, resulting in fat edges and saddle-shaped wear during driving, affecting line maintenance, ride comfort and safety.

Method used

The contoured medium frequency induction heating coil is installed at the furnace opening of the induction heating furnace. Through low power and short-term heating, the deviation between the longitudinal heating temperature of the rail and the temperature in the furnace does not exceed ±50℃, and the length of the heat-affected zone is shortened.

Benefits of technology

It effectively shortens the length of the soft zone of the heat-affected zone during the rail heating process, reduces the number of soft points, and improves the service life of the rail and the smoothness of the vehicle.

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Abstract

The present invention discloses a rail heel heating device, which is used to reduce the length of the heat-affected zone of the rail heel, and specifically includes: an induction heating furnace, wherein an induction heating coil is arranged in the furnace mouth of the induction heating furnace, wherein the induction heating coil is gradually arranged densely from the inside to the outside, and the induction heating coil is electrically connected to the induction heating machine. The present invention is based on the original induction heating furnace, and a certain length of contoured medium-frequency induction heating coil is added to the upper furnace wall at the furnace mouth. Under low-power and short-time working conditions, the longitudinal heating temperature of the rail heel under the coil is guaranteed to deviate from the temperature in the furnace by no more than ±50°C. Ultimately, the length of the soft zone of the heat-affected zone during the heating process of the rail heel is shortened, the number of soft spots is reduced, and the service life of the rail and the smoothness of the vehicle passing are improved.
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