Pipe secondary heating composite method

By using only half of the electromagnetic induction heaters in the steel-plastic composite pipe processing equipment for heating, and utilizing the waste heat for secondary heating, the problem of excessive load on the power supply box of multi-tube processing equipment was solved, enabling continuous production and improving the bonding strength of the plastic liner.

CN117445409BActive Publication Date: 2026-05-26GUANGZHOU BIYUAN PIPE IND CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGZHOU BIYUAN PIPE IND CO LTD
Filing Date
2023-11-02
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing steel-plastic composite pipe processing equipment experiences excessive load on the power supply box during multi-pipe processing, leading to frequent high-temperature shutdowns, affecting processing continuity, and easily causing equipment malfunctions.

Method used

The method involves filling half of the pipe at a time, using only half of the electromagnetic induction heaters for heating, and using the waste heat to cool the pipe. The other half of the electromagnetic induction heaters does not heat but moves synchronously, using the waste heat for secondary heating, reducing the load on the power supply box and enabling non-stop processing.

Benefits of technology

It effectively reduced the frequency of high-temperature shutdowns in the power supply box, ensuring production continuity, improving the bonding strength between the plastic liner and the steel pipe, and avoiding the risk of loss of control due to high-temperature shutdowns of the equipment.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention relates to the field of steel-plastic composite pipe processing technology, particularly a secondary heating composite method for pipes. It employs an automated high-pressure steel-plastic composite pipe processing equipment with a maximum single-processing capacity of 4 or 8 pipes. Half the maximum processing capacity of pipes is loaded into the automated high-pressure steel-plastic composite pipe processing equipment. The corresponding electromagnetic induction heater is used to induction heat the inflated pipes, and the other half of the pipes are loaded. This pipe is then induction heated, while simultaneously, residual heat is used to heat the previously cooled pipes. The pipes are processed using existing automated high-pressure steel-plastic composite pipe processing equipment. By employing a method where half of the electromagnetic induction heaters induction heats the pipes while the other half operates automatically without induction heating, the load on the equipment's power supply box is reduced, thus achieving non-stop processing and ultimately resulting in better processing continuity.
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