High-pressure-resistant and impermeable heat-preservation composite pipeline and preparation method thereof

A thermal insulation composite, anti-penetration technology, applied in the field of pipelines, can solve problems such as low pressure resistance, achieve the effects of improving strength, enhancing interface bonding, and broad application prospects

Inactive Publication Date: 2019-12-20
河北汇锐管业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention proposes a high-pressure-resistant and anti-seepage thermal insulation composite pipe and its preparation method, which solves the problem of

Method used

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  • High-pressure-resistant and impermeable heat-preservation composite pipeline and preparation method thereof
  • High-pressure-resistant and impermeable heat-preservation composite pipeline and preparation method thereof
  • High-pressure-resistant and impermeable heat-preservation composite pipeline and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A high-pressure-resistant and anti-seepage thermal insulation composite pipeline, comprising an inner working layer, a middle insulating layer, and an outer protective layer arranged sequentially from the inside to the outside, and the inner working layer includes an anti-penetration barrier layer arranged sequentially from the inside to the outside, Polyethylene material layer, modified reinforcement layer, heat-sensitive micro-foaming adhesive layer, prepreg tape wrapping layer, polyethylene material layer is PERT-Ⅱ type high-density polyethylene material layer, anti-permeation barrier layer is made of nylon MXD6 or vinyl / vinyl alcohol copolymer, the modified reinforcement layer is glass fiber reinforced nylon MXD6 layer, the prepreg tape winding layer is glass fiber reinforced polyethylene prepreg tape layer, the middle insulation layer is polyurethane foam insulation layer, and the outer protective layer Made of high density polyethylene,

[0047] A method for prep...

Embodiment 2

[0059] A high-pressure-resistant and anti-penetration thermal insulation composite pipe, the structure of which is the same as in Example 1, and its preparation method comprises the following steps:

[0060] S1. Weigh the raw materials according to the following components by weight: 40 parts of nylon MXD6, 20 parts of glass fiber, 0.3 parts of silane coupling agent KH550, 1.2 parts of antioxidant 1010, 0.6 parts of fatty acid amide, and 7 parts of polyolefin elastomer ;

[0061] S2. Immerse the glass fibers in an aqueous solution of silane coupling agent KH550 with a mass ratio concentration of 1%, soak for 9 minutes, dry the soaked glass fibers at 80°C for 30 minutes, and then raise the temperature to 125°C for 30 minutes. , to obtain surface-treated glass fibers;

[0062] S3, mixing nylon MXD6 with antioxidant 1010, fatty acid amide, and polyolefin elastomer at the speed of high mixer 200r / min for 10min, then adding the surface-treated glass fiber obtained in step S2 throu...

Embodiment 3

[0071] A high-pressure-resistant and anti-penetration thermal insulation composite pipe, the structure of which is the same as in Example 1, and its preparation method comprises the following steps:

[0072] S1. Weigh the raw materials according to the following components by weight: 43 parts of nylon MXD6, 33 parts of glass fiber, 0.6 part of silane coupling agent KH550, 1.5 parts of antioxidant 1010, 0.7 part of fatty acid amide, and 10 parts of polyolefin elastomer ;

[0073] S2. Immerse the glass fibers in an aqueous solution of silane coupling agent KH550 with a mass ratio concentration of 1.5%, soak for 10 minutes, dry the soaked glass fibers at a temperature of 85°C for 30 minutes, and then raise the temperature to 130°C for 30 minutes. , to obtain surface-treated glass fibers;

[0074] S3, mixing nylon MXD6 with antioxidant 1010, fatty acid amide, and polyolefin elastomer at the speed of high mixer 200r / min for 10min, then adding the surface-treated glass fiber obtain...

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Abstract

The invention belongs to the technical field of pipelines, and provides a high-pressure-resistant and impermeable heat-preservation composite pipeline and a preparation method thereof. The heat-preservation composite pipeline comprises an inner-layer working layer, a middle-layer insulating layer and an outer-layer protective layer which are sequentially arranged from inside to outside, wherein the inner-layer working layer comprises an impermeable barrier layer, a polyethylene material layer, a modified reinforcing layer, a heat-sensitive micro-foaming adhesive layer and a prepreg tape winding layer which are sequentially arranged from inside to outside, wherein the polyethylene material layer is a PERT-II type high-density polyethylene material layer, the impermeable barrier layer is made of nylon MXD6 or ethylene/vinyl alcohol copolymers, the modified reinforcing layer is a glass fiber reinforced nylon MXD6 layer, the prepreg tape winding layer is a glass fiber reinforced polyethylene prepreg tape layer, and the modified reinforcing layer is composed of the following components of, in parts by weight, 35-50 parts of nylon MXD6, 15-50 parts of glass fiber, 0.2-1 part of a silanecoupling agent, 1-2 parts of an antioxidant, 0.5-1 part of a lubricant and 5-15 parts of a toughening agent. The heat-preservation composite pipeline and the preparation method solve the problem thatthe high-density polyethylene composite heat preservation pipeline is low in pressure resistance.

Description

technical field [0001] The invention belongs to the technical field of pipelines, and relates to a high-pressure-resistant and anti-penetration thermal insulation composite pipeline and a preparation method thereof. Background technique [0002] With the continuous expansion of cities and the continuous extraction of oil and natural gas, the demand for transportation pipelines is also increasing. Traditional pipes are mainly steel pipes and FRP pipes. For steel pipelines, due to the extremely harsh environmental conditions of ore mining, the humid air, and the existence of a large amount of flammable and explosive dust and gases, various corrosive gases, liquid substances, etc. in the mine, the steel pipelines are easily corroded. The corrosion rate of steel pipes is 0.2-1.2mm, which directly leads to shortened service life of steel pipes and increased maintenance costs. In addition, when steel pipes are used as pipes for coal mines, due to their relatively large specific ...

Claims

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Application Information

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IPC IPC(8): F16L9/12F16L59/02F16L57/02F16L58/00C08L77/02C08L23/02C08K9/06C08K7/14C08K5/54C08K5/134C08K5/20C08K13/06C09J163/00C09J151/08C09J129/04C09J11/04
CPCC08K2003/2241C08L77/02C08L2203/18C08L2205/025C08L2205/035C09J11/04C09J163/00F16L9/121F16L57/02F16L58/00F16L59/021C08L23/02C08K9/06C08K7/14C08K5/54C08K5/134C08K5/20C08K13/06C08L63/00C08L51/085C08L29/04C08K3/22C08K5/544
Inventor 侯连龙澹台建礼姚天姿
Owner 河北汇锐管业有限公司
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