Sleeve dismounting device and method based on asynchronous multi-frequency induction heating

Abstract

The invention relates to a sleeve dismounting device and method based on asynchronous multi-frequency induction heating, and belongs to the technical field of heat treatment. The device comprises a computer, a platform, a cooling device arranged on the platform, a water tank, a rack fixed to the platform, a supporting roller arranged on the rack, a vertical power table fixed to the side face of the platform, a multi-frequency induction heating device, a rotary chuck device, a horizontal moving device, a semicircular baffle and a temperature measuring device. According to the principle that the penetration depths of currents at different frequencies are different, an inner pipe and an outer pipe of a sleeve are made to have a large temperature difference, so that the inner pipe and the outer pipe deform to different degrees after being heated, the original interference fit between the inner pipe and the outer pipe is changed into clearance fit, and finally the inner pipe and the outer pipe are separated through pushing force provided by an inner jaw chuck and the semicircular baffle. Therefore, the waste of materials is reduced.

Description

technical field [0001] The invention belongs to the technical field of heat treatment, and in particular relates to a casing removal device and method based on asynchronous multi-frequency induction heating. Background technique [0002] In the industrial field, the casing is mainly used in oil and gas gathering and transportation pipelines, oil and gas well casings, sewage reinjection pipelines; chemical heat exchanger tube bundles; metallurgy, seawater desalination, pharmaceutical chemicals, sewage treatment, new energy, food processing and other industries. The casing is composed of an outer tube and an inner tube closely matched with its inner wall surface. The main material of the outer tube is carbon steel, which is responsible for pressure bearing and rigid support of the pipeline. The main material of the inner tube is alloy, which is responsible for corrosion resistance and wear resistance. damage etc. The installation of the casing is to use the principle of therm...

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Problems solved by technology

[0003] In actual industrial production activities, due to the damage of the inner and outer tubes, the inner and outer tubes of the casing need to be replaced frequently. At present, the method used for the removal of the casing is the fire-spraying method, and the fire-spraying method cannot Guaranteed the penetration depth of the heating area, which brings serious inconvenience to the removal of the casing, resulting in a great waste of materials

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