Steel-plastic composite pipe

A technology of steel-plastic composite pipe and steel belt, which is applied in the direction of pipes, rigid pipes, pipes/pipe joints/pipe fittings, etc., and can solve problems such as uneven structural strength of pipes, inability to withstand internal pressure, peeling and fracture, etc.

Inactive Publication Date: 2011-06-08
SICHUAN JINYI PLASTIC PIPE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reinforced composite pipes made in this way have achieved remarkable results in various properties, but because the steel strips are "∩" type, and the gaps between the steel strips are filled with high-density polyethylene resin,

Method used

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  • Steel-plastic composite pipe
  • Steel-plastic composite pipe
  • Steel-plastic composite pipe

Examples

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Embodiment 1

[0011] Example 1, see figure 1 , figure 2 The steel-plastic composite pipe includes a steel strip 4 with a special-shaped section and a plastic coating 2. The special-shaped section of the steel strip is hollow and closed, and then spirally wound into a tubular body 1. The adjacent edges of the steel strip are fixed by welding. The inner and outer layers of the body are provided with a plastic coating. The special-shaped section of the steel strip is hollow and closed, with one side being flat and the other protruding outward. In order to ensure the tight combination of the plastic coating and the steel strip, an adhesive resin layer 3 is added between the steel strip and the plastic coating. In order to prevent the hollow interior of the steel strip from corroding, the inner surface of the hollow steel strip is also provided with an adhesive resin layer and a plastic coating.

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PUM

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Abstract

The invention discloses a steel-plastic composite pipe. The steel-plastic composite pipe comprises a steel strip (4) with a specially-shaped cross section and plastic coatings (2), and is characterized in that: the specially-shaped cross section of the steel strip is hollow and closed; the steel strip is spirally wound to form a tubular body (1); adjacent edges of the steel strip are fixedly welded; and both inner layer and outer layer of the tubular body are provided with the plastic coatings. Since the specially-shaped steel strip has a hollow and closed structure and is wound and welded to form the tubular body, the ring stiffness of a pipeline is obviously improved, high-strength pressure can be born, the pipe is difficultly degummed and squeezed to be broken, and the aims of high strength, high pressure bearing capacity, firm steel-plastic adhesion, difficulty in separating steel from plastic and continuous integral steel strips are fulfilled.

Description

technical field [0001] The invention relates to a pipe material, in particular to a steel-plastic composite pipe. Background technique [0002] Polyethylene drainage bellows and coiled pipes have excellent performance, but their low ring stiffness limits the depth of burial and load carrying. In order to obtain drainage pipes with high ring stiffness, various reinforcement methods have been adopted at home and abroad to produce steel belt reinforced polyethylene spiral corrugated pipes. The basic process is: apply viscose resin on the steel, and roll the steel into a "∩" special-shaped steel strip, then spirally wind it on the inner layer made of high-density polyethylene, and then apply it on the surface of the steel strip. A layer of high-density polyethylene resin is used, and the gap between the steel strips is filled with high-density polyethylene resin to obtain a steel strip-reinforced polyethylene spiral corrugated pipe. The reinforced composite pipes made in this ...

Claims

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Application Information

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IPC IPC(8): F16L9/147F16L9/17
Inventor 陈建平李康荣黄力
Owner SICHUAN JINYI PLASTIC PIPE IND
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