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PCCPEC pipeline for fluid conveying

A fluid transportation and pipeline technology, which is applied in the field of fluid transportation PCCPEC pipelines, can solve problems such as the inability to protect prestressed steel wires, and achieve the effects of avoiding hydrogen embrittlement broken wires, improving hydrogen embrittlement sensitivity, and avoiding hydrogen embrittlement broken wires

Pending Publication Date: 2019-04-05
BEIJING HANJIANHESHAN PIPELINE CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if the outer coating is used, due to the cracks in the body mortar protective layer, the outer coating will be cracked by tension and cannot protect the prestressed steel wire in the corrosive environment

Method used

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  • PCCPEC pipeline for fluid conveying

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Embodiment Construction

[0011] In the actual production process, the steel plate is made into a thin steel cylinder (3) by a steel cylinder welding machine, and then the socket steel ring (1) and the socket steel ring (2) are welded to both ends of the thin steel cylinder (3), Steel wire anchoring devices are welded on the socket steel ring (1) and the socket steel ring (2). After the steel mold is installed, the pipe core concrete (4) is poured inside and outside the thin steel cylinder (3) by vertical vibration method. After the strength required by the wire is wound on the outer wall of the prestressed steel wire (5), after the steel wire is wrapped, the polymer protective coating (6) is sprayed on the surface of the prestressed steel wire (5), and then the coarse sand protective body (7) is sprayed On the surface of the polymer protective coating (6), and finally on the roller shot mortar protective layer (8), a finished pipeline is formed, and is sent to the construction site after meeting the re...

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Abstract

The invention relates to a PCCPEC pipeline for fluid conveying. The basic structure of the PCCPEC pipeline is composed of a bell mouth steel ring (1), an inserting port steel ring (2), a thin steel cylinder (3), pipe core concrete (4), a prestress steel wire (5), a high-molecular protective coating (6), a coarse sand protective body (7) and a mortar protective layer (8). According to the pipeline,on the basis of guaranteeing the mechanical property of the prestress steel wire, the hydrogen embrittlement sensitivity of the prestress steel wire is greatly improved; an isolation protection system of the prestress steel wire is formed through the high-molecular protective coating, and thus the prestress steel wire in the corrosion environment can still be effectively protected even if outer protection layer mortar is cracked, even the cathode protection can be cancelled, and the phenomenon of hydrogen embrittlement and wire breakage caused by the over-protection is effectively avoided; through the bonding and solidifying of coarse sand and a prestress steel wire protective layer, and an integrated bond system is formed through the coarse sand, the prestress steel wire protective layerand the outer protection layer mortar, compared with a traditional PCCP pipeline, the binding bond strength of the prestress steel wire is improved by two times or above.

Description

Technical field: [0001] The invention relates to a fluid transport PCCPEC pipeline, PCCPEC (embedded prestressed steel sleeve coated steel wire concrete pipe). It is a prestressed steel sleeve concrete composite water transmission and distribution pipeline, which can ensure the reliability, durability and operation safety of the pipeline. Background technique: [0002] Prestressed Concrete Cylinder Pipe (hereinafter referred to as PCCP) is a composite pipe composed of concrete core, steel cylinder, prestressed steel wire, mortar protection layer, socket steel ring, etc. Its production and application have a history of more than 70 years, and it has been widely used in America, Europe, Africa, Asia and other regions. Due to the characteristics of the pipe structure, PCCP has the characteristics of high impermeability, strong ability to withstand internal and external pressure, good joint sealing, excellent seismic performance, long economic life, fast and convenient installa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/153
CPCF16L9/153
Inventor 曲兴辉付立强夏小文
Owner BEIJING HANJIANHESHAN PIPELINE CO LTD
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