Large-caliber spiral welding steel plastic composite pressure pipe and manufacturing method thereof

Abstract

The invention relates to the technical field of steel plastic composite steel pipe manufacturing, in particular to a large-caliber spiral welding steel plastic composite pressure pipe and a manufacturing method thereof, and the problems that the manufacturing method of the existing steel plastic composite steel pipe is single, the structural strength of the pipe body is not ideal, and the adhesion strength of a plastic composite layer is poor are solved. The large-caliber spiral welding steel plastic composite pressure pipe is formed by compounding five or more than five layers of materials with different characteristics, wherein the middle layer is a spirally formed welded steel pipe, the inner surface and the outer surface of the spirally formed welded steel pipe are respectively provided with an inner hot melt adhesive layer and an outer hot melt adhesive layer, the outer hot melt adhesive layer of the spirally formed welded steel pipe is provided with an outer wound plastic layer, and the inner hot melt adhesive layer of the spirally formed welded steel pipe is provided with an inner wound plastic layer. The large-caliber spiral welding steel plastic composite pressure pipe has large integral structure strength and ring stiffness, good rigidity, high bearing pressure, and smooth inner and outer wall surfaces, and the manufacturing method is suitable for manufacturing large-caliber steel plastic composite pressure pipes.

Description

technical field [0001] The invention relates to the technical field of manufacturing steel-plastic composite steel pipes, in particular to a large-caliber spiral welded steel-plastic composite pressure pipe and a manufacturing method thereof. [0002] Background technique [0003] Steel-plastic composite steel pipe is a new type of double-sided anti-corrosion product. It is popular because of its high strength, good rigidity, high ring stiffness, creep resistance, small linear expansion coefficient, and smooth inner wall. It is also environmentally friendly and has good thermal insulation performance. The construction cost is low, the service life is long, and it is widely used in water supply and drainage pipelines. In the prior art, the inner wall of the steel-plastic composite pipe is lined with plastic pipe mainly through the use of a special round pipe reducing machine and tractor to line the plastic pipe on the inner wall of the steel pipe to be constructed, and adopt...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems that the existing steel-plastic composite steel pipes have a single production method, the structural strength of the pipe body is not ideal, and the adhesion of the plastic composite layer is poor, and to provide a kind of reasonable process design, automatic production, and the ability to withstand high internal pressure. Manufacturing method of large-diameter spiral welded steel-plastic composite pressure pipe with pressure pipe body

Images