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

A technology of rotomolding and composite pipes, which is applied in the direction of pipes, rigid pipes, pipes/pipe joints/fittings, etc., which can solve the problem that the cost of pipe materials and ring stiffness have not reached an organic unity, the primary utilization rate of materials is not high, and the investment in production equipment High cost and other problems, to achieve the effect of high utilization rate of raw materials, satisfying anti-corrosion and low investment in production equipment

Inactive Publication Date: 2009-01-14
付志敏 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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-wa

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Figure 1, figure 2 As shown, the plastic composite pipe with steel ring is rotomolded, and the steel ring 2 is wrapped in the wave crest of the corrugated pipe body 1. The steel ring 2 coincides with the center line of the bellows body 1, and the steel ring is made of hollow rectangular steel. The bellows body 1 is provided with a socket 1a at one end.

[0040] The manufacturing method of rotomolding plastic composite pipe with steel ring consists of the following steps:

[0041] (1) Make mold 3, (see Figure 7, Figure 8 ) The inner cavity of the through pipe formed by the upper mold and the lower mold is provided with an annular groove 3a; one end of the mold 3 is also provided with upper and lower molds corresponding to the socket 1a.

[0042] (2) Cover the inner surface of the mold with release agent;

[0043] (3) Perform surface treatment on the steel ring, and set positioning nails on the outer surface and both sides of the steel ring;

[0044] (4) Calculate the volume...

Embodiment 2

[0055] Figure 1, image 3 As shown, the plastic composite pipe steel ring with steel ring formed by rotational molding is made of hollow round steel, and the rest of the structure is the same as that of the first embodiment.

[0056] The manufacturing method of rotomolding plastic composite pipe with steel ring consists of the following steps:

[0057] (1) Make mold 3, (see Figure 7, Figure 8 1) An annular groove 3a is provided in the inner cavity of the through tube formed by the upper mold and the lower mold;

[0058] (2) Spread the release agent on the inner surface of the mold 3;

[0059] (3) Perform surface treatment on the steel ring, and set positioning nails on the outer surface and both sides of the steel ring;

[0060] (4) Calculate the volume of the plastic pipe wall according to the formula v=[πr 2 L-π(r-h) 2 L]×k

[0061] Where r- the outer diameter of the nozzle of the bellows body 1; L- the integral length of the bellows body 1 and the socket 1a;

[0062] h- the thi...

Embodiment 3

[0070] Figure 1, Figure 4 As shown, the plastic composite pipe steel ring with steel ring formed by rotational molding is made of "I" steel without a socket structure, and the rest of the structure is the same as that of the first embodiment.

[0071] The manufacturing method of rotomolding plastic composite pipe with steel ring consists of the following steps:

[0072] (1) Make mold 3, (see Figure 7, Figure 8 1) An annular groove 3a is provided in the inner cavity of the through tube formed by the upper mold and the lower mold;

[0073] (2) Spread the release agent on the inner surface of the mold 3;

[0074] (3) Perform surface treatment on the steel ring, and set positioning nails on the outer surface and both sides of the steel ring;

[0075] (4) Calculate the volume of the plastic pipe wall according to the formula v=[πr 2 L-π(r-h) 2 L]×k

[0076] Where r- the outer diameter of the nozzle of the bellows body 1; L- the integral length of the bellows body 1 and the socket 1a; ...

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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...

Claims

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Application Information

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IPC IPC(8): F16L9/147
Inventor 付志敏陈蕴
Owner 付志敏
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