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RTP pipeline and manufacturing method thereof

A manufacturing method and technology for pipelines, which are applied in pipeline protection, chemical instruments and methods, and pipeline damage/wear prevention, etc., can solve serious constraints on the compressive strength and shear resistance of pipeline joints, and insufficient shear resistance of RTP pipelines. and other problems, to achieve the effect of improving pressure bearing capacity and corrosion resistance, enhancing shear resistance, and increasing adhesive friction.

Pending Publication Date: 2017-11-17
曹如锋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an RTP pipe and its manufacturing method, which is used to solve the problem of insufficient shear resistance of the RTP pipe in the prior art, which can only be connected with HDPE inner pipes. , which seriously restricts the compressive strength and shear resistance of the pipe joints.

Method used

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  • RTP pipeline and manufacturing method thereof
  • RTP pipeline and manufacturing method thereof

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Embodiment 1

[0036] Such as figure 1As shown, the present invention is a kind of RTP pipeline, comprises HDPE resin inner pipe 11 and PE resin outer pipe 15 coaxially sleeved on the outside of HDPE resin inner pipe 11, and two layers of fibers spirally wound on the outer wall of HDPE resin inner pipe 11 Yarn layer 13, the inner side of the fiber yarn layer 13 adjacent to the HDPE resin inner tube 11 is bonded with the HDPE resin inner tube 11 through the thermoplastic resin layer 12 coated on the outer wall of the HDPE resin inner tube 11, the two layers of fiber yarn layers 13 The outer surface is coated with a thermoplastic resin layer 14, the inner fiber yarn layer 13 is bonded with the outermost fiber yarn layer 13 through the thermoplastic resin layer 14, and the outermost fiber yarn layer 13 is covered by the outermost fiber yarn layer 13. The thermoplastic resin layer 14 is bonded to the inner wall of the PE resin outer tube 15 .

[0037] The fiber yarn among the present invention ...

Embodiment 2

[0049] This embodiment also provides a kind of RTP pipeline, and its only difference with the RTP pipeline of embodiment 1 is that this embodiment has only one layer of fiber yarn, and the inner side of the fiber yarn layer is bonded to the outer wall of the HDPE resin inner tube through a thermoplastic resin layer , The outside of the fiber yarn layer is bonded to the PE resin outer tube through a thermoplastic resin layer.

[0050] A manufacturing method of RTP pipeline in embodiment 2, comprises the following steps:

[0051] 1) Coating a 0.15-0.25 mm thick thermoplastic resin layer on the outer wall of the HDPE resin inner pipe by a thermoplastic resin layer coating machine while the plastic extruder 1 extrudes the HDPE resin inner pipe;

[0052] 2) Pass the HDPE resin inner tube treated in step 1) through the pipeline heater at a heating temperature of 180±5°C. After the thermoplastic resin layer on the outer layer of the HDPE resin inner tube is melted, pass the fiber yar...

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Abstract

The invention provides an RTP pipeline and a manufacturing method thereof. The RTP pipeline comprises an HDPE resin inner pipe, a PE resin outer pipe coaxially sleeving the HDPE resin inner pipe and at least one layer of fiber yarn layers spirally wound on the outer wall of the HDPE resin inner pipe; the inner side of the fiber yarn layer adjacent to the HDPE resin inner pipe is bonded with the HDPE resin inner pipe through a thermoplastic resin layer coated on the outer wall of the HDPE resin inner tube, each outer surface of the fiber yarn layer is coated with one thermoplastic resin layer, and is bonded with the fiber yarn layer adjacent to the outer surface or the PE resin outer pipe inner wall through the thermoplastic resin layer. According t the RTP pipeline, under the action of high temperature and pressure, the fiber yarn layers is fully bonded with the HDPE resin inner pipe and the PE resin outer pipe through the thermoplastic resin layers, and all the layers are bonded together to form a whole, so that the anti-shearing capacity of the RTP pipeline is greatly enhanced, and great contribution is made to improve the compression resistance of the whole pipeline.

Description

technical field [0001] The invention relates to the field of RTP pipelines, in particular to an RTP pipeline and a manufacturing method thereof. Background technique [0002] RTP pipe is the abbreviation of fiber reinforced thermoplastic composite pipe, which is composed of inner pipe, fiber layer and outer pipe. Because of its corrosion resistance, high pressure resistance, light weight, high flexibility, and coilability, it is widely used in land, petroleum, sewage, chemical, gas transmission and other fields, and it has been applied to submarine oil pipelines in recent years. [0003] Traditional RTP pipes are manufactured in two ways: [0004] The first is to wind the dry fiber on the outer wall of the HDPE resin inner pipe without glue, and then cover the outermost layer of the pipe with a layer of PE resin outer pipe. Although the RTP pipe produced by this process can withstand the internal pressure, because the structural layer and the inner and outer layers have no...

Claims

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Application Information

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IPC IPC(8): F16L9/14F16L57/02B29C69/00B32B1/08B32B17/10B32B17/02B32B27/32B32B37/12
CPCF16L9/14F16L57/02B29C69/008B32B1/08B32B27/12B32B27/32B32B37/12
Inventor 曹如锋
Owner 曹如锋
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