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Connection method of ultrahigh molecular weight polyethylene pipelines

A technology of ultra-high molecular weight and connection method, which is applied in the field of connection of ultra-high molecular weight polyethylene pipes, can solve problems such as the sealing of unfavorable pipe joints, achieve the effects of improving on-site installation speed, facilitating anti-corrosion treatment, and reducing material consumption

Inactive Publication Date: 2011-03-23
JIANGSU SHENSHI NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above structure completely relies on the compression rubber sealing ring of the external threaded sleeve and the threaded female sleeve to achieve sealing, which is not conducive to the sealing of the joint of the pipeline when it is subjected to high pressure, and needs to be improved.

Method used

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  • Connection method of ultrahigh molecular weight polyethylene pipelines
  • Connection method of ultrahigh molecular weight polyethylene pipelines

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Embodiment Construction

[0030] See attached picture,

[0031] The inner diameter shown in the first embodiment of the present invention is 2R 1 , wall thickness L 1 , the outer diameter is Φ 1 =2(R 1 +L 1 ) The connection method of the ultra-high molecular weight polyethylene pipeline, comprising the following steps:

[0032] 1. Prepare special-shaped steel rings and steel sleeves with the following structures for use:

[0033] Steel ring: It is an integral structure composed of two parts with the same inner diameter and different wall thickness. Its inner diameter is 2 mm larger than the outer diameter of UHMWPE pipe, and the inner ring of the steel ring is at the smaller wall thickness. Its outer diameter is Φ 2 2(R1+L1+L2+2mm), the width of the inner ring of the steel ring is A 2 , which is the UHMWPE pipe wall thickness L 1 2.5 times of that, the thicker part is the outer ring of the steel ring, and its outer diameter is Φ 3 2 (R1+2L1+L2+2mm), the width of the outer ring of the steel ring...

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Abstract

The invention relates to a connection method of ultrahigh molecular weight polyethylene pipelines, comprising the following steps: carrying out the U-shape turning on the ends of the pipelines, adding a sealing rubber ring at the joint part of two U-shape turnups, lining a steel ring at the interior of the U-shape turnup and sleeving a steel jacket which has a tapered inside at the outside; pressing two U-shape joints into the steel jacket from two sides of the external steel jacket by squeezing the steel rings of the two pipelines from the both sides, and performing the compulsively squeezing based on the slope principle; and sealing by a high strength anaerobic adhesive, galvanizing the steel pieces at the joint part, and then performing the packaging and sealing by the radiation cross-linked polyethylene heat-shrinkable tape. The connection method of the invention can bear the pressure of 30 MPa without the leakage, and can reduce the consumption of the joint material and enhance the construction speed significantly.

Description

(1) Technical field: [0001] The invention relates to a connection method of pipelines, in particular to a connection method of ultra-high molecular weight polyethylene pipelines. (two) background technology: [0002] The ultra-high molecular weight polyethylene material has a saturated chemical bond macromolecular structure, and its polarity is very weak. The connection methods of heat fusion welding and electric heat fusion welding of ordinary polyethylene pipes are completely ineffective. The connection of ultra-high molecular weight polyethylene pipes is a long-standing international problem. In the prior art, the welding method of ultra-high molecular weight polyethylene pipes is to place a heating wire between the two outer molds, and then seal the two ports between the special inner mold and the outer mold, press them with high strength, and heat for 40- 50 minutes. This process and equipment are mature and have been widely used in China. However, the disadvantage o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L47/00
Inventor 刘阜东刘海鹰牟其善
Owner JIANGSU SHENSHI NEW MATERIAL TECH
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