Rotational molding plastic composite pipes with steel rings and manufacturing method thereof

Abstract

The invention discloses a rotational molding steel ring plastic composite pipe material and a manufacturing method thereof; the wave crest of a sylphon bellowss body (1) is packed with a steel ring (2); the manufacturing method is divided into the steps of mold (3) manufacture, coating mold release agent, steel ring surface treatment, raw material weight calculation, material filling and mold closing, rotating heating insulation, cooling, mold release, modification, inspection, finished products into warehouse, etc., so as to obtain the composite pipe material. The rotational molding steel ring plastic composite pipe material is combined with the steel ring; the plastic pipe body and the steel ring can be organically integrated into a whole, taking the advantage to make up for the deficiency so as to obtain double win, thereby not only meeting the needs of stiffness and strength of a large-caliber pipeline, but also meeting the needs of corrosion protection and service life prolonging, and manufacturing pipe material with arbitrary ring stiffness and diameter; the rotational molding steel ring plastic composite pipe material has small production equipment investment, easy equipment maintenance, high raw material using rate and almost no waste generation, reaches organic unification of pipe material cost and rigidity, and manufactures a buried pipe material with appropriate cost, arbitrary large caliber, self-taking mouthing and mouthing socket connection.

Description

Technical field [0001] The invention belongs to a plastic pipe in the field of industrial and civil engineering. Specifically, it relates to a large-diameter plastic composite corrugated pipe with steel ring formed by rotational molding and a manufacturing method thereof. Background technique [0002] Since buried pipes are mainly subjected to external pressure loads, they have higher requirements on ring stiffness, and the ring stiffness is proportional to the moment of inertia of the pipe wall and the elastic modulus of the constituent materials; to achieve the same ring stiffness, the structural wall pipe can be more rigid than the solid wall The pipe saves 30%-70% of raw materials. According to the information, the diameter of the former can reach DN2400mm, and the diameter of the latter can reach DN1200mm in China. Therefore, structural wall pipes are usually used. Buried plastic structure wall pipes are divided into three categories: single / double wall corrugated pipes, rei...

AI Technical Summary

Problems solved by technology

In the spiral wound pipe, the metal-reinforced wound spiral pipe has a higher rigidity of the edge ring and saves materials, so it has a large development space; however, due to various reasons such as the low utilization rate of materials at one time, the wound formed pipe cannot compete with double-walled pipes below 800mm. Corrugated pipe, the pipe diameter above 800mm cannot compete with carat pipe

The above-mentioned plastic buried pipes generally have high production equipment investment costs, complicated production control, and the pipe cost and ring stiffness have not reached an organic unity.

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