Parameter Optimization and Prediction Model of Induction Heating for Large-Diameter Pipe

Xiurong Fang,Junfeng Wang,Jinhui Yang,Jia Lu

doi:10.1155/2018/8430578

Xiurong Fang, Junfeng Wang + Show 2 more

Open Access

https://doi.org/10.1155/2018/8430578

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Abstract

The parameters of induction heating of large-diameter pipes have a direct effect on the final processing quality of the elbow, and the complexity of multifield coupling of magnetothermal force in induction heating can make it impossible to quantitatively optimize the design parameters of the induction heating device. In this paper, X80 pipeline steel induction heating is taken as the research object, and a corresponding numerical model is established. The influence of induction heating process parameters on the heating temperature of pipeline steel under the skin effect is determined. First, the influence of process parameters on the heating effect of pipeline steel is quantified by orthogonal test. Then, taking the optimum temperature difference between the inner and outer wall of X80 pipeline steel during the induction heating process as a target, the optimal process parameter set of the pipe induction heating is determined by using neural network genetic algorithm. Finally, comparing the relevant test criteria of the regression equation, the optimum mathematical prediction model of the outer wall temperature of the pipe induction heating process is obtained, which provides a theoretical basis for optimization of the process parameters of the pipe-based induction heating device.

Highlights

The induction heating of pipe is one of the common techniques for production of elbows thanks to its rapid heating, easy cooling, small thinning rate of wall thickness, and easy adjustment of the bending radius of elbow
In the actual project of oil and gas transmission engineering, the bending of large-diameter pipes in oil and gas transportation pipe network is mostly processed by hydraulic push-type induction heating pipe bending machine
It is required to realize continuous operation of propulsion󳨀→heating󳨀→bending󳨀→cooling󳨀→forming while the induction heating device fulfills the local heating of the pipe when the pipe bending machine is working [3]

Summary

Introduction

The induction heating of pipe is one of the common techniques for production of elbows thanks to its rapid heating, easy cooling, small thinning rate of wall thickness, and easy adjustment of the bending radius of elbow. In the actual project of oil and gas transmission engineering, the bending of large-diameter pipes in oil and gas transportation pipe network is mostly processed by hydraulic push-type induction heating pipe bending machine. It is required to realize continuous operation of propulsion󳨀→heating󳨀→bending󳨀→cooling󳨀→forming while the induction heating device fulfills the local heating of the pipe when the pipe bending machine is working [3]. The influence of various parameters on the heating effect of the induction heating forming process for large-diameter pipe is not yet clear. The detailed theoretical guidance and basis for the selection and optimization of design parameters on the induction heating device are not yet available. The optimization of the process parameters of pipe induction heating is investigated by means of numerical simulation and mathematical methods

Analysis on Induction Heating Parameters of Pipes

Results

Parameter Optimization Based on Orthogonal Test Design

Conclusions