Double-layer polyethylene composite tubular product with ultrahigh molecular weight

Abstract

The invention discloses a double-layer polyethylene composite tubular product with ultrahigh molecular weight, belonging to the technical field of tubular products. The tubular product comprises an inner wall, a metal layer and an outer wall; the metal layer consists of a steel strip layer and a steel wire layer; the steel strip layer is arranged along the direction parallel to the tubular product axial lead equidistantly, the steel strip thickness is 0.5-3 millimeters, and the space between the steel strips is 10-20millimeters; an ultrahigh molecular weight polyethylene hot melt adhesive is coated on the steel strip layer with the coating layer thickness of 0.7-3.0millimeters; the steel wire layer is of a structure that the packed steel strip layer is spiral wound at the direction vertical to the tubular product axial lead, wherein the steel wire is a spring steel wire, and the diameter of the steel wire is 0.8-2.5millimeters; and the materials of the inner wall and the outer wall are polyethylene with molecular weight more than 2.5 million units. The tubular product provided by the invention has the advantages of reasonable structural design, high abrasion and corrosion resistance performances and high bearing capability, the optimal pressure can reach 16MPa, and is the double-layer polyethylene composite tubular product with ultrahigh molecular weight which has wide application wide and long service life.

Description

technical field [0001] The invention relates to a polyethylene pipe, in particular to a double-layer ultra-high molecular weight polyethylene composite pipe, which is mainly used in petroleum, chemical, mining, construction and other industries. Background technique [0002] In the prior art, there are multiple structures of composite pipes lined with steel wires. For example, CN2202838Y discloses a composite pipe with a layer of metal braided mesh sandwiched between the inner wall and the outer wall of the pipe; CN2142168Y discloses at least one layer of wound steel wire layer and plastic A composite pipe with an adhesive layer between the core pipe and the plastic outer layer; the impact strength, tensile strength, wear resistance, environmental cracking resistance and fatigue resistance of the above structural pipes are all low, and its bearing pressure can only reach 2.5MPa. There are also polyethylene or silane crosslinked polyethylene materials as the inner wall of th...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the existing pipe design structure and provide a "double-layer ultra-high molecular weight polyethylene composite pipe"

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