Double-layer PE gas pipe with termite-proof protective layer

A protective layer and anti-termite technology, applied in the direction of pipeline protection, pipes, rigid pipes, etc., can solve the problems of troublesome process, gas leakage, bitten through, etc., achieve the effect of safe and convenient connection, and improve safety and reliability

Active Publication Date: 2013-09-04
GUANGDONG LIANSU TECH INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, while PE gas pipes are widely used, there are also some difficult problems that need to be solved.
As we all know, gas pipelines have high requirements for safety performance. However, due to the low hardness of PE materials, they can be damaged or even bitten through by termites, resulting in gas leakage; The surface is easily scratched during the laying process, which also brings serious hidden dangers to the safe use of PE pipes
In addition, when PE pipes are connected by electrofusion, the surface of the pipes needs to be treated, which is relatively troublesome.

Method used

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  • Double-layer PE gas pipe with termite-proof protective layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The raw material of outer protective layer 2 is 100 parts of PP-H resin, 2 parts of sorbitol nucleating agent, 2 parts of yellow masterbatch, 3 parts of titanium dioxide; the raw material of inner layer 1 is 100 parts of PE100 resin, 3 parts of black masterbatch, The two groups of raw materials were blended separately and entered into a double-layer co-extrusion die to extrude the pipe to prepare a double-layer PE gas pipe with a nominal outer diameter of 20mm and an outer layer thickness of 0.2mm. Before the pipe is connected by electrofusion, use a special tool to cut the outer protective layer along the edge of the connection part, then peel off the protective layer to expose the PE resin connection part of the electrofusion connection, and insert it into the electrofusion pipe fitting for electrofusion connection.

Embodiment 2

[0032] The raw material of outer protective layer 2 is 100 parts of PP-R resin, 2 parts of sorbitol acetal nucleating agent, and 2 parts of black masterbatch; the raw material of inner layer 1 is 100 parts of PE100-RC resin, 5 parts of black masterbatch, two The raw materials of the group were blended separately and entered into a double-layer co-extrusion die to extrude the pipe to prepare a double-layer PE gas pipe with a nominal outer diameter of 225mm and an outer layer thickness of 2.5mm. Connection method is the same as embodiment 1.

Embodiment 3

[0034] The raw material of the outer protective layer 2 is 100 parts of PP-R resin, 2 parts of orange masterbatch, and 3 parts of titanium dioxide; the raw material of the inner layer 1 is 100 parts of PE100 resin and 3 parts of black masterbatch. The pipe is extruded from a layer co-extrusion die to prepare a double-layer PE gas pipe with a nominal outer diameter of 110 mm and an outer layer thickness of 0.7 mm. Connection method is the same as embodiment 1.

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Abstract

The invention relates to the technical field of gas pipelines, in particular to a double-layer PE gas pipe with a termite-proof protective layer. The double-layer PE gas pipe comprises a gas pipeline which is of a double-layer structure formed by an inner layer used as a conveying pipe and an outer protective layer capable of preventing corrosion by termites. A bonding layer is arranged on the connection portion of the inner layer and the outer protective layer. The outer protective layer can be separated from the inner layer with the bonding layer under the effect of external force in a peeling mode. Certain bonding force exists between the inner layer and the outer protective layer, the fact that the two layers can be bound tightly and cannot slide or be separated is guaranteed, and meanwhile during a mounting process, the outer protective layer on a needed portion can be separated in a peeling mode through external force, a conveying pipe of the inner layer cannot be damaged, compared with a single-layer PE gas pipe, the double-layer PE gas pipe has the advantages that a termite-proof function is achieved, scratching is prevented, connecting is safe and convenient, and safety and reliability of using and mounting of the gas pipe can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of gas pipelines, in particular to a double-layer PE gas pipeline with a termite-proof protective layer. Background technique [0002] PE gas pipe has the advantages of long service life, strong chemical corrosion resistance, simple and reliable construction, good air tightness, good toughness, energy saving, and low overall cost of pipelines. It has been more and more used in gas transportation. In some areas, PE pipelines have been used as the first choice for urban gas pipelines. [0003] However, while PE gas pipes are widely used, there are also some difficult problems that need to be solved. As we all know, gas pipelines have high requirements for safety performance. However, due to the low hardness of PE materials, they can be damaged or even bitten through by termites, resulting in gas leakage; The surface is easily scratched during the laying process, which also brings serious hidden dangers to th...

Claims

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Application Information

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IPC IPC(8): F16L9/147F16L57/00
Inventor 李统一
Owner GUANGDONG LIANSU TECH INDAL
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