Rail welding head normalizing system

Abstract

The invention discloses a rail welding head normalizing system in the field of metal heat treatment. The rail welding head normalizing system comprises a medium-frequency power source control cabinet,a normalizing transformer and a medium-frequency induction heating coil. The input end of the normalizing transformer is connected with the output end of the medium-frequency power source control cabinet. The medium-frequency induction heating coil comprises a first active coil and a second active coil. A closed loop coil with a T-shaped vertical cross section is defined by the first active coiland the second active coil. The top of the first active coil is connected with a first busbar, the top of the second active coil is connected with a second busbar, the top of the first busbar and thetop of the second busbar correspondingly pass through a top electrode plate to be connected with the output end of the normalizing transformer, and so that a closed loop circuit is formed among the first busbar, the first active coil, the second active coil, the second busbar and the normalizing transformer.

Description

technical field [0001] The invention relates to a rail welding joint normalizing system in the field of metal heat treatment. Background technique [0002] At present, flash welding technology is mainly used for the connection of railway rails. Due to the high temperature of the welding joint, the grains of the rails on both sides grow too much, which seriously affects the mechanical properties of the welded joints of the rails. The normalizing treatment can effectively improve the grain size on both sides of the rail weld and improve the mechanical properties of the rail. At present, the normalizing system of rail welding joints mainly adopts two heating methods, which are intermediate frequency induction heating coil heating and flame heating. Compared with flame heating, medium-frequency induction heating has the advantages of fast heating speed, measurable heating temperature, automatic control, and guaranteed normalizing quality. [0003] The intermediate frequency in...

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Problems solved by technology

[0003] The intermediate frequency induction heating coil currently used is mainly profiling, but the shape and size of each part of the rail welding joint are very different, and the profiling intermediate frequency induction heating coil is difficult to achieve uniform heating and difficult to disassemble. Can be used, it is difficult to use in the field rail laying site

[0004] At the same time, because the roadbed where the rails are laid may go uphill or downhill, it may cause the normalizing transformer to slide downhill, and it is impossible to accurately place the medium frequency induction heating coil at the welding joint of the rails

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