Heat treatment device and heat treatment method for corrugated pipe with complex contour

Abstract

The invention provides a heat treatment device for a corrugated pipe with a complex contour. The heat treatment device is characterized in that an induction heating mechanism, a quenching cooling unitassembly, a rotating lifting platform and a bottom plate are sequentially arranged from top to bottom; in the induction heating mechanism, shells of servo motors are fixedly connected with the innerside of a fixing ring, the output ends of the servo motors are fixedly connected with the input ends of worms, and a circular induction coil is connected with the inner sides of opposite rotating typeworm gears; and the opposite rotating type worm gears comprise magnetizers and non-magnetizers, the magnetizers and the non-magnetizers account for half of the opposite rotating worm gears correspondingly, and the opposite rotating type worm gears are arranged on the circular induction coil in a circumferential array mode. According to a heat treatment method, the principle that the magnetizers can change the magnetic flux density and direction is applied, and the rotating speed and the rotating angle of the opposite rotating type worm gears are adjusted and controlled in real time accordingto the heated contour shape of the sinusoidal corrugated pipe, so that uniform heat treatment of the sinusoidal corrugated pipe is achieved, and the continuity of a hardening layer is guaranteed; andmeanwhile, the heat treatment device and heat treatment method are suitable for sinusoidal corrugated pipes with different corrugated periods and wave crest heights.

Description

technical field [0001] The invention relates to the field of heat treatment of pipes, in particular to a heat treatment device and a heat treatment method for bellows with complex contours. Background technique [0002] Heat exchangers are a common safety equipment in nuclear power plants, and are widely used in many fields such as chemical industry, energy, refrigeration, metallurgy, etc. Strengthening the heat exchange capacity of heat exchangers has always been the key research direction of domestic and foreign scholars. The corrugated pipe is a special-shaped heat exchange pipe based on the enhanced heat transfer technology. The wall surface of the pipe is composed of multiple groups of tangential arcs. It has many advantages such as high heat exchange efficiency, strong thermal compensation ability, and not easy to scale. In practical engineering applications, by reducing the corrugation period or increasing the peak height, the bellows fluid can be strengthened to gene...

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Problems solved by technology

[0003] At present, due to the complex outline of the bellows, the hardened layer of the traditional circular coil is not uniform after heating, and stress concentration is prone to occur at the peak; at the same time, because of the complex outline of the bellows, the profiling The production cost of the coil is high and the scope of application is small, and only a certain type of bellows can be induction heated

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