Thermoplastic composite pipe with sealing and buckling joint, and manufacturing method

A technology of thermoplastics and crimping joints, which is applied in the direction of pipes/pipe joints/fittings, pipe connection arrangements, mechanical equipment, etc., can solve problems such as bulging and bursting of the outer protective layer, and structural instability of composite pipes, so as to achieve high production efficiency and improve production efficiency. Effect of sealing performance and improving tensile strength

Active Publication Date: 2018-01-26
TUBULAR GOODS RES INST OF CNPC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conveying medium accumulated between the structural layers will cause the structural instability of the composite pipe, and the possibility of the outer protective layer bulging and bursting will be greatly increased

Method used

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  • Thermoplastic composite pipe with sealing and buckling joint, and manufacturing method
  • Thermoplastic composite pipe with sealing and buckling joint, and manufacturing method
  • Thermoplastic composite pipe with sealing and buckling joint, and manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Improving the sealing performance of polyester fiber reinforced polyethylene composite pipe joints.

[0037](1) Shape memory alloy ring processing: select a shape memory alloy material with a transformation temperature of 25°C, adjust the indoor temperature to >25°C, and process the shape memory alloy ring 4 to ensure that the inner diameter of the shape memory alloy ring 4 is the same as the outer diameter of the core tube 1, The width of the shape memory alloy ring 4 is 10 mm, the minimum wall thickness is 5 mm, and the wedge angle of the outer surface of the shape memory alloy ring 4 is 10°; (2) Assembly of the shape memory alloy ring: assemble two pieces of shape memory alloy ring 4 to the outside of the core tube 1 , 2 shape-memory alloy rings 4 with a pitch of 5 sawtooth teeth (3); (3) shape-memory alloy ring treatment: adjust the indoor temperature 25°C, the shape memory alloy ring 4 will slowly and automatically recover the shape before the treatment, and its th...

Embodiment 2

[0039] Improving the sealing performance of steel belt reinforced polyethylene composite pipe joints

[0040] (1) Shape memory alloy ring processing: select shape memory alloy materials with a transition temperature of 20°C, adjust the indoor temperature to >20°C, and process the shape memory alloy ring 4 to ensure that the diameter of the shape memory alloy ring 4 is the same as the inner diameter of the sleeve 2, and the shape The width of the memory alloy ring 4 is 12 mm, the minimum wall thickness is 6 mm, and the wedge angle of the inner surface of the shape memory alloy ring 4 is 15°; (2) Assembly of the shape memory alloy ring: assemble three pieces of shape memory alloy rings 4 to the inside of the sleeve 2, 3 pieces of shape memory alloy rings 4 have a pitch of 4 sawtooth teeth; (3) shape memory alloy ring treatment: adjust the indoor temperature 20°C, the shape memory alloy ring 4 will slowly and automatically recover the shape before the treatment, and its thickness...

Embodiment 3

[0042] Improving the sealing performance of continuous glass fiber tape reinforced polyethylene composite pipe joints

[0043] (1) Shape memory alloy ring processing: select a shape memory alloy material with a transformation temperature of 25°C, adjust the indoor temperature to >25°C, and process shape memory alloy rings matching the outer diameter of the core tube 1. The width of the shape memory alloy ring 4 is is 11mm, the minimum wall thickness is 5.5mm, and the wedge angle of the outer surface of the shape memory alloy ring 4 is 10°; at the same time, the shape memory alloy ring 4 matching the inner diameter of the sleeve 2 is processed, and the width of the shape memory alloy ring 4 is 10mm, and the minimum The wall thickness is 4mm, and the wedge angle of the inner surface of the shape memory alloy ring 4 is 11°; (2) Assembly of the shape memory alloy ring: assemble two shape memory alloy rings 4 to the outside of the core tube 1, and two shape memory alloy rings 4 to t...

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Abstract

The invention discloses a thermoplastic composite pipe with a sealing and buckling joint, and a manufacturing method. The thermoplastic composite pipe comprises a buckling joint comprising a core pipe, and the outer diameter of the right side of the core pipe is smaller than the outer diameter of the left side of the core pipe; the right outer wall of the core pipe is sheathed with a casing, and the inner wall of the sleeve is provided with a sawtooth groove; the outer wall of the core pipe is provided with a sawtooth groove, and an assembly cavity is formed between the inner wall of the casing and the outer wall of the core pipe, and fit to the wall size of the composite pipe on the right side of the buckling joint; and the outer wall of the sawtooth groove in the outer wall of the core pipe and the inner wall of the sawtooth groove in the inner wall of the casing are both provided with shape memory alloy rings of which the outer walls are fit to the composite pipe, so that the mechanical binding force between the metal core pipe or the casing and the composite pipe is improved effectively, and the purpose of improving the sealing performance of the buckling joint is achieved. Themethod is simple and effective, and high in manufacturing efficiency, and additional energy consumption is not required.

Description

technical field [0001] The invention relates to the technical field of manufacturing non-metallic composite pipe products, in particular to a thermoplastic composite pipe with a sealed buckle joint and a manufacturing method. Background technique [0002] Reinforced thermoplastic composite pipes are widely used in oil and gas fields due to their continuous molding, a single length of up to hundreds of meters, fewer joints, good flexibility, excellent impact resistance, light weight, low transportation costs, and quick and easy installation. It has become the non-metallic tube with the most development potential in my country. [0003] The product structure of my country's reinforced thermoplastic composite pipe is basically a typical three-layer structure such as inner lining layer, reinforcing layer and outer protective layer, and the pipe connection method is usually connected by metal joints. The metal joint is made by crimping method: the metal core tube is inserted into...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L47/22F16L47/06
CPCY02A20/20
Inventor 李厚补戚东涛吴河山秦鹏
Owner TUBULAR GOODS RES INST OF CNPC
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