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Polyolefin pipe easy to repair quickly, and repair process method thereof

A process method and polyolefin technology, applied in the field of quick and easy repair polyolefin pipes and their repair technology, can solve the problems of shortened pipe life, difficulty in fitting the lining material of the main pipe, etc., to facilitate transportation and installation, improve the effect of surface interface, light weight effect

Active Publication Date: 2021-08-27
ANHUI UNIVERSITY OF ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current pipeline repair methods mainly adopt excavation or non-development excavation, and the repair system is formed by winding the repair tape or the lining of the casing to form a bonded and solidified repair system. It is difficult for the lining materials of the winding repair tape and casing to follow the main pipeline during installation. Curves that cannot follow sudden diameter changes, smooth and strong lining materials that are difficult to follow the shape of the main pipe, and will shorten the life of the repaired pipe

Method used

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  • Polyolefin pipe easy to repair quickly, and repair process method thereof
  • Polyolefin pipe easy to repair quickly, and repair process method thereof
  • Polyolefin pipe easy to repair quickly, and repair process method thereof

Examples

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Effect test

Embodiment 1

[0029]The repairing process method of easy-to-repair, quick and easy-to-repair polypropylene pipes includes the following steps: S1. Preparatory work: use a pipeline stop valve to cut off the fluid transported by the fast and easy-to-repair polypropylene pipes that need to be repaired, and clean them up; S2. Detection and positioning: Acoustic emission detection is used to quickly and easily repair the damaged part of the polypropylene pipe and locate it; S3. Wrap the glass fiber fabric impregnated with resin on the transparent inflatable airbag to obtain the wrapped fabric airbag, which is transported by the transport robot to the In the damaged part, the glass fiber fabric impregnated with resin is multi-layer wound and hollow, and there is an ultraviolet lamp irradiation robot inside the transparent air bag for repairing, and the transport robot inflates the inner cavity of the transparent repair air bag to make the glass fiber fabric expand, thereby making the The outer wal...

Embodiment 2

[0033] The inorganic filler is Jiangsu Guangyuan ultrafine talcum powder GY950, polyethylene TR480 and the wall thickness is 38.2mm; the glass fiber fabric is alkali-free glass fiber cloth, and the mass per unit area of ​​the three layers is 1200g / m 2 , The width of the fabric is 420mm at an arrangement angle of 0°, and the multi-axial stitching fabric EUL1200 (0) EP-420E6 Taishan glass fiber with a stitch density of 6 needles / inch.

[0034] Select polyethylene resin, add 0.5% dicumyl peroxide and 10% vinyl oxirane by polyethylene mass, mix evenly, use twin-screw extruder at 180°C, extrude and granulate to obtain epoxy resin After the modified polyethylene resin, use the extrusion molding method to manufacture fast and easy-to-repair polyolefin pipes, mold forming pipe blanks, vacuum sizing sleeves for cooling and sizing, vacuum spray cooling, pipe cooling, traction, and cutting. The SJB-120 single-screw extruder is used for production and molding, and the extrusion molding pr...

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Abstract

The invention belongs to the technical field of plastic pipeline repair, and particularly relates to a polyolefin pipe easy to repair quickly, and a repair process method thereof. According to the polyolefin pipe, common PP and PE materials are modified, and therefore the polyolefin pipe contains evenly-distributed epoxy groups, has the advantages of excellent chemical corrosion resistance, abrasion resistance, high insulativity, high-temperature resistance, no toxicity, light weight and convenient in transportation and installation, and is an excellent product which is easy to repair compared with common PP pipes. Glass fiber fabric impregnated with resin generates cross-linking reaction under the action of light, heat and an initiators to form three-dimensional cross-linked insoluble and infusible physical structure molecules; once a monomer is initiated, free radicals are generated, and molecular chains are rapidly increased to form macromolecules, wherein comb-shaped macromolecule polyacrylamide is capable of improving the surface interface action; the physical and chemical properties of a cured product can be improved, and therefore the pipeline repair process requirements and the pipeline use and long-term reliability requirements can be met; and the polyolefin pipe easy to repair quickly contains the epoxy groups, and therefore self-repair can be realized.

Description

technical field [0001] The invention belongs to the technical field of repairing plastic pipes, in particular to quick and easy repairing of polyolefin pipes and a repairing process thereof. Background technique [0002] Polypropylene (PP) resin is one of the earliest plastic varieties to achieve industrial production in the world, and its output ranks third in the world's resin output. Due to its low price, wide range of raw materials, wear resistance, chemical corrosion resistance, excellent electrical insulation performance and high mechanical strength, it has a wide range of applications in industry, agriculture, construction, daily necessities, packaging and electricity. With the continuous improvement of urban construction, non-excavation pipe laying, pipe repairing and pipe replacement technology has a series of advantages such as fast pipe laying speed, high efficiency, no environmental damage, and no influence on people's normal work and life. The advantages are mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C35/08B29C73/02B29C73/04
CPCB29C35/0805B29C73/02B29C73/04B29C2035/0827
Inventor 程从亮解文杰张峰君胡先海
Owner ANHUI UNIVERSITY OF ARCHITECTURE
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