Plastic lining composite pipe

Abstract

The invention discloses a plastic lined composite tube, comprising a plastic inner tube and a metal outer tube; wherein a macromolecule elastic heat insulating layer is compounded between the plastic inner tube and the metal outer tube. The invention uses the scalability of the macromolecule elastic heat insulating layer between the plastic inner tube and the metal outer tube to solve the problems caused by the different linear swell factors of the plastic inner tube and the metal outer tube, and leads the matching between the plastic inner tube and the metal outer tube to be more stable. Meanwhile, the plastic lined composite tube also has the characteristics of good heat preservation and insulation as well as strong reliability.

Description

Technical field [0001] The invention relates to a composite pipe, in particular to a plastic-lined composite pipe that requires heat preservation, cold resistance, and high pressure resistance, such as cold and hot water supply, solar water heaters, chemical pipeline pipes and the like. Background technique [0002] At present, the plastic-lined composite pipe on the market is mainly composed of a plastic inner pipe and a metal outer pipe. The metal outer pipe is tightly wrapped on the outer wall of the plastic inner pipe. Although this composite pipe solves the problem of the strength of the plastic inner pipe , Insufficiency of rigidity and hardness, leading to the problem of cracking, but there are still some shortcomings: [0003] 1. The plastic inner tube and the metal outer tube cause delamination due to the difference in linear expansion coefficients, or the plastic inner tube is restricted by the metal stress of the metal outer tube to force the two ends of the plastic in...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a thermal insulation performance, high reliability, which can solve the problem caused by the difference in linear expansion coefficient between the plastic inner tube and the metal outer tube, and make the cooperation between the plastic inner tube and the metal outer tube more stable. plastic-lined composite pipe

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