Novel structure for polyethylene reinforced compound pipe

Abstract

The invention discloses a novel structure for a polyethylene reinforced compound pipe and belongs to the technical field of pipes. The novel structure for the polyethylene reinforced compound pipe comprises a substrate pipe, a metal reinforced layer, a fiber reinforced layer and an outer wall, wherein at least one metal reinforced layer and at least one fiber reinforced layer are arranged; specially used glues are heated and are used for integrally adhering the substrate pipe to the fiber reinforced layer, adhering the fiber reinforced layer to the metal reinforced layer and adhering the metal reinforced layer to the metal reinforced layer; the fiber reinforced layer is arranged at an equidistant interval, in the form of forming an inclined angle of 0-10 degrees between the fiber reinforced layer and the axial line of the pipe; an inclined angle between the metal reinforced layer and the axial line of the pipe is 54-70 degrees; the metal reinforced layer has a steel wire bidirectional crossed wound structure; the steel wire is a spring steel wire; and the diameter of the steel wire is 0.3-2.5 millimeters. The novel structure for the polyethylene reinforced compound pipe has the advantages of reasonable structure design, strong wear-resisting decay resistance and high loading capacity. Compared with a traditional pipe, the novel structure for the polyethylene reinforced compound pipe has the advantages that the loading capacity of the pipe is increased by 2-3 times, a steel pipe in a specific application field can be replaced by the polyethylene reinforced compound pipe, the application range is wide and the service life is long.

Description

technical field [0001] The invention relates to a polyethylene pipe, in particular to a novel polyethylene-reinforced composite pipe structure, which is mainly used in petroleum, chemical, mining, river port dredging and other industries. Background technique [0002] In the prior art, steel-plastic composite pipes are mainly composed of PE and steel. The main disadvantages are: poor pressure bearing capacity, and compared with PE and ultra-high molecular weight polyethylene, ultra-high molecular weight polyethylene has better impact strength, It has irreplaceable advantages in low temperature performance, tensile strength, wear resistance, environmental stress cracking resistance, fatigue resistance, self-lubricating performance, scaling resistance, and chemical corrosion resistance. Steel pipes have strong pressure resistance, but poor corrosion resistance and wear resistance. Every year, industries such as petroleum, chemical industry, mining, and river port dredging cons...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, steel-plastic composite pipes are mainly composed of PE and steel. The main disadvantages are: poor pressure bearing capacity, and compared with PE and ultra-high molecular weight polyethylene, ultra-high molecular weight polyethylene has better impact strength, It has irreplaceable advantages in low temperature performance, tensile strength, wear resistance, environmental stress crack resistance, fatigue resistance, self-lubricating performance, anti-scaling, chemical corrosion resistance, etc.

There are also polyethylene or silane cross-linked polyethylene materials as the inner wall of the composite pipe. Due to the low strength of the inner wall of the composite pipe and the winding method of the steel wire, cracking occurs during installation and use.

If glass fiber reinforced plastic is used as the outer wall, the outer wall of this composite pipe has poor crack resistance and high brittleness, and is easy to crack or peel off, and the exposed steel wire will be corroded quickly, causing pipeline leakage

[0004] In view of the above, it is of great economic significance to develop a polyethylene-reinforced composite pipe that can not only exert the application characteristics of steel-plastic composite pipes, especially ultra-high molecular weight polyethylene, but also overcome the poor pressure bearing capacity of existing steel-plastic composite pipes.

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