Medium frequency induction heating coil for steel rail welding head

Abstract

The invention discloses a medium frequency induction heating coil for a steel rail welding head. The medium frequency induction heating coil comprises a first effective coil and a second effective coil, wherein the first effective coil and the second effective coil encircle a closed loop coil, the vertical section of which is in a shape of an untranslatable Chinese character; the top of the firsteffective coil is connected to a first busbar; the top of the second effective coil is connected to a second busbar; the top of the first busbar and the top of the second busbar are externally connected to a transformer through a top electrode plate, correspondingly, so that the first busbar, the first effective coil, the second effective coil, the second busbar and the transformer form a closed loop. The medium frequency induction heating coil has the technical effects that in the medium frequency induction heating process of the steel rail welding head, the steel rail welding head is heatedin an encircled manner, so that thermal treatment of the steel rail welding head after the steel rail is welded meets the standard request, normalizing treatment of the steel rail welding head is facilitated, and the metal structure property of the steel rail welding head is improved.

Description

technical field [0001] The invention relates to a medium-frequency induction heating coil for a rail welding joint in the field of metal heat treatment. Background technique [0002] At present, the flash welding technology is mainly used for the connection of railway rails. Due to the high temperature of the welding joint (exceeding the melting point), the grains of the rails on both sides grow too much, which seriously affects the mechanical properties of the rail welding joints. The normalizing treatment can effectively improve the grain size on both sides of the welded joint of the rail and improve the mechanical properties of the rail. Now rail normalizing mainly adopts two heating methods, which are medium frequency induction 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. The intermediate frequenc...

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Problems solved by technology

However, the shape and size of each part of the rail vary greatly, and it is difficult to achieve uniform heating with the profiling inductor; in addition, the traditional profiling induction heating coil is difficult to disassemble, so it can be used in the fixed welding in the enterprise, but in the field rail laying site, The induction heating coil should be disassembled and moved frequently, and the traditional induction heating coil is used, which prolongs the disassembly time and reduces the work efficiency

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