阅读说明：本技术 一种耐腐蚀抗高温高压管道及其制作方法 (Corrosion-resistant high-temperature-resistant high-pressure pipeline and manufacturing method thereof ) 是由 赵冰岩 张爱群 刘诚 张严 于 2021-08-20 设计创作，主要内容包括：本发明公开了一种耐腐蚀抗高温高压管道,包括管道本体以及分别涂覆在管道本体内表面和外表面上的内防腐涂层和外防腐涂层,外防腐涂层外部包覆有外保温层,外保温层外部设置有外防护层；内防腐涂层厚度不小于75um,主要由环氧粉末和纳米碳纤维制成,其中环氧粉末100～150份,纳米炭纤维10～20份；外保温层厚度不小于35mm,主要由热塑性树脂制成和碳素纤维复合材料制成,热塑性树脂300～450份,碳素纤维复合材料30～100份；外防护层厚度不小于1.5mm,主要由高密度聚乙烯和聚丙烯制成,其中高密度聚乙烯100～200份,聚丙烯50～120份；本发明的耐腐蚀抗高温高压管道,管道耐腐蚀抗高温高压能力好,制备方便,成本较低,使用寿命长。(The invention discloses a corrosion-resistant high-temperature-resistant high-pressure-resistant pipeline, which comprises a pipeline body, an inner anti-corrosion coating and an outer anti-corrosion coating, wherein the inner anti-corrosion coating and the outer anti-corrosion coating are respectively coated on the inner surface and the outer surface of the pipeline body; the thickness of the inner anti-corrosion coating is not less than 75um, and the inner anti-corrosion coating is mainly prepared from 100-150 parts of epoxy powder and 10-20 parts of nano carbon fiber; the outer heat-insulating layer is not less than 35mm thick and mainly made of thermoplastic resin and carbon fiber composite material, wherein the thermoplastic resin accounts for 300-450 parts, and the carbon fiber composite material accounts for 30-100 parts; the thickness of the outer protective layer is not less than 1.5mm, and the outer protective layer is mainly made of high-density polyethylene and polypropylene, wherein the high-density polyethylene accounts for 100-200 parts, and the polypropylene accounts for 50-120 parts; the corrosion-resistant high-temperature and high-pressure resistant pipeline has the advantages of good corrosion resistance, high-temperature and high-pressure resistance, convenience in preparation, lower cost and long service life.)

1. The corrosion-resistant high-temperature-resistant high-pressure-resistant pipeline is characterized by comprising a pipeline body, an inner corrosion-resistant coating and an outer corrosion-resistant coating, wherein the inner corrosion-resistant coating and the outer corrosion-resistant coating are respectively coated on the inner surface and the outer surface of the pipeline body;

the thickness of the inner anti-corrosion coating is not less than 75um, and the inner anti-corrosion coating is mainly prepared from 100-150 parts of epoxy powder and 10-20 parts of nano carbon fiber;

the thickness of the outer anti-corrosion coating is not less than 80um, and the outer anti-corrosion coating is mainly prepared from 100-150 parts of epoxy powder and 20-60 parts of polytetrafluoroethylene;

the outer heat-insulating layer is not less than 35mm thick and mainly made of thermoplastic resin and carbon fiber composite material, wherein the thermoplastic resin accounts for 300-450 parts, and the carbon fiber composite material accounts for 30-100 parts;

the thickness of the outer protective layer is not less than 1.5mm, and the outer protective layer is mainly made of high-density polyethylene and polypropylene, wherein the high-density polyethylene accounts for 100-200 parts, and the polypropylene accounts for 50-120 parts.

2. A corrosion-resistant high temperature and pressure resistant pipe according to claim 1, wherein the inner corrosion-resistant coating further comprises the following components in mass fraction: 1-6 parts of a lubricant and 0.1-2 parts of a cross-linking agent, wherein the lubricant is polyethylene wax, and the cross-linking agent is silane;

the outer anti-corrosion coating also comprises the following components in percentage by mass: 10-20 parts of nano carbon fiber, 1-6 parts of lubricant and 0.1-2 parts of cross-linking agent, wherein the lubricant is polyethylene wax, and the cross-linking agent is silane.

3. A corrosion resistant, high temperature and pressure resistant pipe according to claim 1 wherein the thermoplastic resin is one or more of high density polyethylene, polypropylene, polyvinyl chloride, polystyrene and polytetrafluoroethylene.

4. The corrosion-resistant high temperature and pressure resistant pipeline according to claim 1, wherein the outer protective layer further comprises the following components in mass fraction: 20-30 parts of epoxy resin, 10-40 parts of polyvinyl chloride paste resin, 10-30 parts of polyurethane foam plastic, 10-20 parts of polytetrafluoroethylene, 3-10 parts of epoxy diluent, 1-10 parts of waterborne silicone resin, 1-10 parts of nano rubber powder, 1-10 parts of isopropyl acetate, 1-10 parts of graphite and 1-10 parts of accelerator.

5. The manufacturing method of the corrosion-resistant high-temperature-resistant high-pressure-resistant pipeline is characterized by comprising the following steps of:

firstly, preparing an inner anticorrosive coating and an outer anticorrosive coating, preparing an inner anticorrosive coating mixed coating and an outer anticorrosive coating mixed coating according to formula proportions of the inner anticorrosive coating and the outer anticorrosive coating respectively, and then spraying the inner anticorrosive coating mixed coating and the outer anticorrosive coating mixed coating on the inner wall and the outer wall of a pipeline body respectively through spraying equipment; uniformly spraying at least two layers, wherein the total thickness of the inner anticorrosive coating is not less than 75um, and the total thickness of the outer anticorrosive coating is not less than 80 um;

secondly, forming an outer protective layer, namely preparing raw materials for preparing the outer protective layer according to the raw material formula of the outer protective layer, forming the outer protective layer through a forming machine, and cooling and forming to obtain the outer protective layer;

thirdly, forming an outer heat-insulating layer; firstly, preparing raw materials of an external heat-insulating layer according to the formula proportion of the external heat-insulating layer, and then uniformly mixing thermoplastic resin and a carbon fiber composite material; then sleeving the outer protective layer formed in the second step on the outside of the pipeline body with the formed inner anti-corrosion coating and the formed outer anti-corrosion coating, plugging two ends of the pipeline body, and fixing the pipeline body relatively; then filling the mixture of the thermoplastic resin and the carbon fiber composite material between the pipeline body and the outer protective layer; and finally, filling high-temperature steam between the pipeline body and the outer protective layer, and foaming and forming the mixture of the thermoplastic resin and the carbon fiber composite material to obtain the outer insulating layer.

Technical Field

The invention belongs to the field of liquid medium conveying pipelines, and particularly relates to a corrosion-resistant high-temperature-resistant high-pressure-resistant pipeline and a manufacturing method thereof.

Background

The pipeline is used for conveying energy sources such as municipal drainage, pollution discharge, heating and water supply, steam conveying and natural gas and petroleum, the pipelines are deeply buried underground for a long time and are corroded by soil, rainwater, underground water, underground mineral substances and the like, and the pipelines are short in service life and high in maintenance cost. In order to solve the problems, corrosion-resistant high-temperature and high-pressure resistant pipelines are particularly proposed.

Disclosure of Invention

The invention aims to provide a corrosion-resistant high-temperature and high-pressure resistant pipeline which has the advantages of good corrosion resistance, high-temperature and high-pressure resistance, convenience in preparation, lower cost and long service life.

The corrosion-resistant high-temperature-resistant high-pressure-resistant pipeline comprises a pipeline body, an inner corrosion-resistant coating and an outer corrosion-resistant coating, wherein the inner corrosion-resistant coating and the outer corrosion-resistant coating are respectively coated on the inner surface and the outer surface of the pipeline body;

the thickness of the inner anti-corrosion coating is not less than 75um, and the inner anti-corrosion coating is mainly prepared from 100-150 parts of epoxy powder and 10-20 parts of nano carbon fiber;

the thickness of the outer anti-corrosion coating is not less than 80um, and the outer anti-corrosion coating is mainly prepared from 100-150 parts of epoxy powder and 20-60 parts of polytetrafluoroethylene;

the outer heat-insulating layer is not less than 35mm thick and mainly made of thermoplastic resin and carbon fiber composite material, wherein the thermoplastic resin accounts for 300-450 parts, and the carbon fiber composite material accounts for 30-100 parts;

the thickness of the outer protective layer is not less than 1.5mm, and the outer protective layer is mainly made of high-density polyethylene and polypropylene, wherein the high-density polyethylene accounts for 100-200 parts, and the polypropylene accounts for 50-120 parts.

Preferably, the inner anti-corrosion coating further comprises the following components in percentage by mass: 1-6 parts of a lubricant and 0.1-2 parts of a cross-linking agent, wherein the lubricant is polyethylene wax, and the cross-linking agent is silane;

the outer anti-corrosion coating also comprises the following components in percentage by mass: 10-20 parts of nano carbon fiber, 1-6 parts of lubricant and 0.1-2 parts of cross-linking agent, wherein the lubricant is polyethylene wax, and the cross-linking agent is silane.

Preferably, the thermoplastic resin is one or more of high density polyethylene, polypropylene, polyvinyl chloride, polystyrene, and polytetrafluoroethylene.

Preferably, the outer protective layer further comprises the following components in percentage by mass: 20-30 parts of epoxy resin, 10-40 parts of polyvinyl chloride paste resin, 10-30 parts of polyurethane foam plastic, 10-20 parts of polytetrafluoroethylene, 3-10 parts of epoxy diluent, 1-10 parts of waterborne silicone resin, 1-10 parts of nano rubber powder, 1-10 parts of isopropyl acetate, 1-10 parts of graphite and 1-10 parts of accelerator.

A manufacturing method of a corrosion-resistant high-temperature-resistant high-pressure-resistant pipeline comprises the following steps:

firstly, preparing an inner anticorrosive coating and an outer anticorrosive coating, preparing an inner anticorrosive coating mixed coating and an outer anticorrosive coating mixed coating according to formula proportions of the inner anticorrosive coating and the outer anticorrosive coating respectively, and then spraying the inner anticorrosive coating mixed coating and the outer anticorrosive coating mixed coating on the inner wall and the outer wall of a pipeline body respectively through spraying equipment; uniformly spraying at least two layers, wherein the total thickness of the inner anticorrosive coating is not less than 75um, and the total thickness of the outer anticorrosive coating is not less than 80 um;

secondly, forming an outer protective layer, namely preparing raw materials for preparing the outer protective layer according to the raw material formula of the outer protective layer, forming the outer protective layer through a forming machine, and cooling and forming to obtain the outer protective layer;

thirdly, forming an outer heat-insulating layer; firstly, preparing raw materials of an external heat-insulating layer according to the formula proportion of the external heat-insulating layer, and then uniformly mixing thermoplastic resin and a carbon fiber composite material; then sleeving the outer protective layer formed in the second step on the outside of the pipeline body with the formed inner anti-corrosion coating and the formed outer anti-corrosion coating, plugging two ends of the pipeline body, and fixing the pipeline body relatively; then filling the mixture of the thermoplastic resin and the carbon fiber composite material between the pipeline body and the outer protective layer; and finally, filling high-temperature steam between the pipeline body and the outer protective layer, and foaming and forming the mixture of the thermoplastic resin and the carbon fiber composite material to obtain the outer insulating layer.

The corrosion-resistant high-temperature and high-pressure resistant pipeline has the beneficial effects that:

1. the inner anti-corrosion coating and the outer anti-corrosion coating respectively realize the corrosion prevention of the inner surface and the outer surface of the pipeline body, so that the pipeline corrosion is avoided, the service life of the pipeline is prolonged, and the use and maintenance cost of the pipeline is reduced.

2. Through setting up outer heat preservation, realize the pipeline heat preservation, reduce the medium and in the transport heat diffusion, cause the energy waste on the one hand, on the other hand avoids the heat to cause the influence to the surrounding environment.

3. Through setting up outer inoxidizing coating, realize protecting pipeline body and outer heat preservation, avoid causing local ambient pressure to the pipeline because of the small change of surrounding environment, avoid the pipeline to warp etc. improve the ability that pipeline body confronted the environmental structure and change.

The manufacturing method of the corrosion-resistant high-temperature and high-pressure resistant pipeline in the technical scheme of the invention has the beneficial effects that: the manufacturing process is simple and quick, the anti-corrosion capability is good, and the pipeline body has certain capability of resisting environmental changes.

Detailed Description

In order to facilitate the understanding of the technical solutions of the present invention for those skilled in the art, the technical solutions of the present invention will now be further described with reference to specific embodiments.

The corrosion-resistant high-temperature-resistant high-pressure-resistant pipeline comprises a pipeline body, and an inner corrosion-resistant coating and an outer corrosion-resistant coating which are respectively coated on the inner surface and the outer surface of the pipeline body, wherein an outer heat-insulating layer is coated outside the outer corrosion-resistant coating, and an outer protective layer is arranged outside the outer heat-insulating layer. The inner anti-corrosion coating and the outer anti-corrosion coating respectively realize the corrosion resistance and the rust resistance of the inner surface and the outer surface of the pipeline body, so that the pipeline corrosion is avoided, the service life of the pipeline is prolonged, and the use, the maintenance and the repair cost of the pipeline are reduced.

In the prior art, the pipeline corrosion prevention is mainly focused on the outer surface, and the corrosion of the conveyed medium to the inner wall of the pipeline is neglected, so that the corrosion prevention capability of the pipeline is reduced, and partial substances enter the conveyed medium after the inner wall of the pipeline is corroded to influence the quality of the conveyed medium. The thickness of the inner anti-corrosion coating provided by the technical scheme is not less than 75um, and the inner anti-corrosion coating is mainly prepared from 100-150 parts of epoxy powder and 10-20 parts of nano carbon fiber. The nano carbon fiber can effectively improve the smoothness of the inner anti-corrosion coating and improve the adhesion capability of the inner anti-corrosion coating, so that the inner anti-corrosion coating has certain capability of resisting the shaking or deformation of the pipeline body, the inner anti-corrosion coating cannot break during the tiny shaking or deformation of the pipeline body, and the anti-corrosion capability of the inner anti-corrosion coating is improved. The inner anti-corrosion coating also comprises the following components in percentage by mass: 1-6 parts of a lubricant and 0.1-2 parts of a cross-linking agent, wherein the lubricant is polyethylene wax, and the cross-linking agent is silane. The addition of lubricants and cross-linking agents improves the chemical properties of the inner corrosion protection layer.

Because the pipeline is buried underground for a long time, the outer anticorrosive coating is indispensable. The thickness of the outer anti-corrosion coating in the technical scheme is not less than 80 um. The epoxy resin is mainly prepared from 100-150 parts of epoxy powder and 20-60 parts of polytetrafluoroethylene. The polytetrafluoroethylene is used, so that the outer anti-corrosion coating has good corrosion resistance, sealing property, electrical insulation property and good ageing resistance. The outer anti-corrosion coating also comprises the following components in percentage by mass: 10-20 parts of nano carbon fiber, 1-6 parts of lubricant and 0.1-2 parts of cross-linking agent, wherein the lubricant is polyethylene wax, and the cross-linking agent is silane.

And an outer heat-insulating layer is wrapped outside the outer anti-corrosion coating, and the thickness of the outer heat-insulating layer is not less than 35 mm. The composite material is mainly prepared from thermoplastic resin and carbon fiber composite material, wherein the thermoplastic resin accounts for 300-450 parts, and the carbon fiber composite material accounts for 30-100 parts; the thermoplastic resin is one or more of high-density polyethylene, polypropylene, polyvinyl chloride, polystyrene and polytetrafluoroethylene. The outer heat-insulating layer has the capabilities of resisting high temperature and high pressure, low temperature, acid and alkali corrosion, oxidation resistance and the like, has long service life, can be used for long-distance medium conveying, reduces the loss of medium capacity, reduces the influence of a pipeline on the surrounding environment, and avoids unnecessary damage.

And an outer protective layer is arranged outside the outer heat-insulating layer and used for fixing and protecting the heat-insulating layer. The thickness of the outer protective layer is not less than 1.5mm, and the outer protective layer is mainly made of high-density polyethylene and polypropylene, wherein the high-density polyethylene accounts for 100-200 parts, and the polypropylene accounts for 50-120 parts. The outer protective layer also comprises the following components in percentage by mass: 20-30 parts of epoxy resin, 10-40 parts of polyvinyl chloride paste resin, 10-30 parts of polyurethane foam plastic, 10-20 parts of polytetrafluoroethylene, 3-10 parts of epoxy diluent, 1-10 parts of waterborne silicone resin, 1-10 parts of nano rubber powder, 1-10 parts of isopropyl acetate, 1-10 parts of graphite and 1-10 parts of accelerator. The outer protective layer is used for isolating an external environment and an outer heat-insulating layer, the outer heat-insulating layer is protected, the outer heat-insulating layer is prevented from being damaged, and the problem that the pipeline body is damaged is indirectly solved. Through setting up outer inoxidizing coating, realize protecting pipeline body and outer heat preservation, avoid causing local ambient pressure to the pipeline because of the small change of surrounding environment, avoid the pipeline to warp etc. improve the ability that pipeline body confronted the environmental structure and change.

The technical scheme of the invention also provides a manufacturing method of the corrosion-resistant high-temperature and high-pressure resistant pipeline. The corrosion-resistant high-temperature-resistant high-pressure-resistant pipeline is prepared by the following steps:

firstly, preparing an inner anticorrosive coating and an outer anticorrosive coating, preparing an inner anticorrosive coating mixed coating and an outer anticorrosive coating mixed coating according to formula proportions of the inner anticorrosive coating and the outer anticorrosive coating respectively, and then spraying the inner anticorrosive coating mixed coating and the outer anticorrosive coating mixed coating on the inner wall and the outer wall of a pipeline body respectively through spraying equipment; two-layer, interior anticorrosive coating gross thickness is not less than 75um, and outer anticorrosive coating gross thickness is not less than 80 um.

And secondly, forming the outer protective layer, namely preparing raw materials for preparing the outer protective layer according to the raw material formula of the outer protective layer, forming the outer protective layer by using a forming machine, and cooling and forming to obtain the outer protective layer.

Thirdly, forming an outer heat-insulating layer; firstly, preparing raw materials of an external heat-insulating layer according to the formula proportion of the external heat-insulating layer, and then uniformly mixing thermoplastic resin and a carbon fiber composite material; then sleeving the outer protective layer formed in the second step on the outside of the pipeline body with the formed inner anti-corrosion coating and the formed outer anti-corrosion coating, plugging two ends of the pipeline body, and fixing the pipeline body relatively; then filling the mixture of the thermoplastic resin and the carbon fiber composite material between the pipeline body and the outer protective layer; and finally, filling high-temperature steam between the pipeline body and the outer protective layer, and foaming and forming the mixture of the thermoplastic resin and the carbon fiber composite material to obtain the outer insulating layer.

In the manufacturing steps, the manufacturing process is simple and quick, the corrosion resistance is good, and the pipeline body has certain capability of resisting environmental changes.

Among the above-mentioned technical scheme, the outer inoxidizing coating of shaping earlier, back direct forming outer heat preservation between outer inoxidizing coating and pipeline body, outer heat preservation shaping is quick, and the shaping is effectual for there is not the clearance between outer heat preservation and the pipeline body outer wall, and it is effectual to keep warm thermal-insulated.

Technical solution of the present invention is described above with reference to the embodiments, and it is obvious that the specific implementation of the present invention is not limited by the above-mentioned manner, and it is within the scope of the present invention to adopt various insubstantial modifications of the method concept and technical solution of the present invention, or to directly apply the concept and technical solution of the present invention to other occasions without any modification.