Online destressing treatment device and process for large-diameter composite pipe

Abstract

The invention discloses an online destressing treatment device and process for a large-diameter composite pipe. The device is composed of an induction heating assembly, an inner temperature measuring assembly, outer temperature control assemblies, a carrier roller assembly and inclined roller straightening assemblies. The induction heating assembly comprises a medium-low-frequency module and a superaudio-frequency heating module, and each outer temperature control assembly comprises a temperature measuring module and a temperature control module. According to the overall layout, the head end and the tail end of the composite pipe are each provided with one inclined roller straightening assembly, a low-frequency induction heating device, a medium-frequency induction heating device and a low-frequency induction heating device of the medium-low-frequency heating module, an induction heating device of the superaudio-frequency heating module and the outer temperature control assemblies matched with the induction heating devices are sequentially installed between the two inclined roller straightening assemblies, the inner temperature measuring assembly is installed at the tail of the composite pipe, and the composite pipe moves forwards along the axis under the action of the carrier roller assembly and the inclined roller straightening assemblies. According to the online destressing treatment device and process, the temperature gradient formed by induction heating is utilized and controlled, and heat treatment defects caused by the destressing treatment temperature difference of a base layer material and a composite layer material of the composite pipe are effectively overcome.

Description

technical field [0001] The invention relates to the field of composite pipes, in particular to an online stress relief processing device for large-diameter composite pipes and a process thereof. Background technique [0002] The bimetallic composite pipe is composed of two metal materials (base layer and cladding layer) with different performance characteristics through specific processes (centrifugal casting, drawing and special welding, etc.). The advantages of metal, therefore, compared with single-material pipes, composite pipes are low in cost and high in comprehensive performance, and are widely used in many fields such as petroleum, chemical industry, metallurgy, food, and construction. Due to the particularity of the process, except for a few cases, the finished composite pipe needs to be annealed at low temperature to achieve the purpose of removing internal stress, but the chemical composition of the base and cladding materials is relatively different, and the temp...

AI Technical Summary

Problems solved by technology

Due to the particularity of the process, except for a few cases, the finished composite pipe needs to be annealed at low temperature to achieve the purpose of removing internal stress, but the chemical composition of the base and cladding materials is relatively different, and the temperature range of stress relief is also different, so Furnace (uniform) heating is not suitable for stress relief annealing of composite pipes, especially for large-diameter and thick-walled composite pipes

Images