Intermediate frequency heating device for internal film coating of steel-plastic composite pipe

Abstract

The invention relates to an intermediate frequency heating device for internal film coating of a steel-plastic composite pipe. The intermediate frequency heating device comprises a framework part, a guiding, moving and heating part, cylinders, air inflation sleeves, a fixing guiderail, a movable top plate and an oil cylinder, the framework parts is a square framework formed by a base, an upright and a cross beam, the guiding, moving and heating part comprises a moving suspension beam, an intermediate frequency heating body and cooling rings, the moving suspension beam adopts a motor drive mode to horizontally move lengthways on the cross beam through the guiderail, the horizontally arranged intermediate heating body is suspended on the lower bottom surface of the moving suspension beam, a plurality of heating through holes are horizontally formed in the intermediate frequency heating body, the cooling rings are respectively symmetrically arranged on the front side and the rear side of the intermediate frequency heating body, the cooling rings are arranged correspondingly to the heating through holes, the lower parts of the cooling rings are opened, the cylinders are respectively arranged in mirror symmetry on the two sides of the base corresponding to each heating through hole, and the air inflation sleeves are flexibly fixed at plunger head parts of the cylinders. The device is ingenious in overall conception and scientific in design, and solves the relatively large technical problems of the existing steel-plastic composite pipe in the processes of air inflating and film coating.

Description

technical field [0001] The invention belongs to the field of metallurgy, and relates to the manufacture of steel-plastic composite pipes, in particular to an intermediate-frequency heating device for inner film coating of steel-plastic composite pipes. Background technique [0002] The steel-plastic composite pipe is after the steel pipe is manufactured, in order to enhance the corrosion resistance of the steel pipe, a layer of plastic film is added to the inner and outer walls of the steel pipe by means of an inner film or an outer film, and the corrosion resistance of the steel pipe can be realized through the plastic film. , thereby prolonging the service life of the steel pipe and avoiding its early corrosion. [0003] At present, the corrosion-resistant plastic film of the steel-plastic composite pipe is tightly attached to the inner wall of the steel pipe by pulling the plastic pipe film into the steel pipe, and then expanding it by thermoplastic means. Usually, therm...

AI Technical Summary

Problems solved by technology

In the production process, the biggest problem is the sealing between the cylinder and the inflatable head. Due to the poor sealing, the pressure in the tube is not up to standard and unstable, resulting in a decrease in the quality of the coating.

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