Heat treatment device and heat treatment method for complex contour bellows

Abstract

The invention provides a heat treatment device for bellows with complex contours, in which an induction heating mechanism, a quenching cooling unit assembly, a rotating lifting platform and a bottom plate are installed sequentially from top to bottom. In the induction heating mechanism, the casing of the servo motor is fixedly connected to the inner side of the fixed ring, the output end of the servo motor is fixedly connected to the input end of the worm, and the circular induction coil is connected to the inner side of the yin-yang worm wheel; the yin-yang worm wheel includes a magnetic conductor The magnetic conductor and the non-magnetic conductor respectively account for half of the yin-yang type worm gear, and the yin-yang type worm gear is arranged in a circular array on the circular induction coil. The heat treatment method of the present invention uses the principle that the magnetizer can change the magnetic flux density and direction, and adjusts the speed and rotation angle of the yin-yang worm wheel in real time according to the contour shape of the sinusoidal bellows heating, so as to realize uniform heat treatment of the sinusoidal bellows and ensure quenching The continuity of the hard layer is also suitable for sinusoidal corrugated pipes with different corrugation periods and peak heights.

Description

technical field [0001] The invention relates to the field of pipe heat treatment, in particular to a heat treatment device and a heat treatment method for bellows with complex contours. Background technique [0002] Heat exchanger is a common safety equipment in nuclear power plants, and it is widely used in chemical industry, energy, refrigeration, metallurgy and many other fields. Enhancing the heat transfer capacity of heat exchanger has always been the key research direction of scholars at home and abroad. Bellows is a special-shaped heat exchange pipe based on enhanced heat transfer technology. The pipe wall is composed of multiple sets of tangent 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 wave peak height, the secondary flow of the corrugated pipe fluid can be strengthened, thereby reducing the ...

AI Technical Summary

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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