CN105443879A - Composite pipe used for city heat-supply engineering and processing technology thereof - Google Patents
Composite pipe used for city heat-supply engineering and processing technology thereof Download PDFInfo
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- CN105443879A CN105443879A CN201410531951.1A CN201410531951A CN105443879A CN 105443879 A CN105443879 A CN 105443879A CN 201410531951 A CN201410531951 A CN 201410531951A CN 105443879 A CN105443879 A CN 105443879A
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Abstract
Provided is a composite pipe used for city heat-supply engineering. The main body of the composite pipe is a heat-proof polyethylene pipe. The outside of the heat-proof polyethylene pipe is sleeved with an enhancement pipe. The enhancement pipe is a steel pipe or an aluminum pipe. The inner wall and the outer wall of the steel pipe are coated with plastic powder layers respectively. The outer surface of the steel pipe is coated with a heat insulating layer. The heat-proof polyethylene pipe and a plastic-coated steel pipe serve as inner pipes. A welded steel pipe serves as a base pipe of the plastic-coated steel pipe. The inner surface and the outer surface of the base pipe are coated with plastic powder, and then the outer surface of the plastic-coated steel pipe is coated with a heat insulating layer. According to the composite pipe used for the city heat-supply engineering, the heat-proof polyethylene pipe is adopted, and the good flexibility, the high heat conductivity and the inertia of poly ethylene (PE) pipes are retained; meanwhile, the pressure resistance is better; the outside of the heat-proof polyethylene (PE-RT II) pipe is sleeved with the enhancement pipe, so that not only deformation of the PE-RT II pipe can be prevented, but also the combination firmness of the steel pipe and the PE-RT II pipe is greatly improved due to the fact that the plastic-coated steel pipe is selected and used by the enhancement pipe; the vacuum adsorption process is adopted on the outer surface of the plastic-coated steel pipe, the rotational molding process is adopted on the inner surface of the plastic-coated steel pipe, and accordingly the firmness of a coating of the plastic-coated steel pipe is greatly improved, high temperature of 95 degrees can be resisted, and the composite pipe can be used for a long time without deformation.
Description
Technical field
The present invention relates to Heat Supply Engineering pipe technology field, be specifically related to a kind of city heat supply engineering composite pipe and processing technology thereof.
Background technique
The thermal insulation pipe that city heat supply engineering uses affects energy-conservation key factor, and the Developing Application of thermal insulation pipe is more and more subject to the most attention of countries in the world.After 20 century 70s, the development of domestic and international most attention insulating steel tube, makes every effort to the consumption significantly reducing the energy, thus reduces environmental pollution and greenhouse effect.Before 1980, the development of China's insulating steel tube is very slow, thermal insulation pipe factory few in number can only produce a small amount of direct buried insulating steel tube, but Chinese thermal insulation pipe industry was through the effort of more than 30 years, particularly through the high speed development of nearly 10 years, many products grow out of nothing, from single to variation, quality from low to high, is applied more and more general.
Thermal insulation pipe used in the market mainly contains " steel sleeve steel ", " mould cover steel " and plastic-coated steel three kinds of forms, and first two pipeline all also exists steel pipe corrosion-resistant, working life short problem, and maintenance, repair, renewal cost are high, and leakage loss is large.And current plastic-coated steel is base tube mainly with Coating Steel Pipe greatly, Coating Steel Pipe inner and outer wall coats plastic powders, but the coating of existing plastic-coated steel easily comes off, this is because the zinc coat on Coating Steel Pipe surface has reflecting action to heat, add zinc coat and improve steel tube surface degree of finish, decrease the absorption of heat, the plastic-coated steel coating result therefore using Coating Steel Pipe as base tube is not good; In addition admixture tackiness agent in plastic powders, although coating can be bonded in steel pipe walls securely after combination process, during test, adhesion index can be completely qualified, but tackiness agent has effective date, effective date is once crossing (generally also three months), and coating can come off, can block flow channel to cause the accident, consequence is serious.
Summary of the invention
The invention provides a kind of city heat supply engineering composite pipe and processing technology thereof, hold caducous problem with the steel pipe corrosion-resistant and plastic-coated steel coating that solve prior art existence.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of city heat supply engineering composite pipe, main body is heat-resisting polyethylene tube, a heat-resisting polyethylene tube outside socket reinforcing pipe.
Above-mentioned reinforcing pipe is steel pipe or aluminum pipe, steel pipe inner wall and outer wall coating plastic powder bed respectively, outer surface of steel tube coating thermal-protective coating.
The processing technology of above-mentioned city heat supply engineering composite pipe, adopt heat-resisting polyethylene tube as interior pipe, plastic-coated steel is as interior pipe, plastic-coated steel is using welded steel pipe as base tube, plastic powders is coated in base tube inner and outer surface, then at plastic-coated steel outer surface thermal-protective coating, concrete steps are using welded steel pipe as base tube, first by base tube preheating, surface temperature is made to meet temperature range required by plastic powders, and control with maximum temperature, use vacuum pump will to take out negative formation vacuum in base tube, then by plastispray on the outer surface of base tube, then rotational molding technique is used to base tube internal surface, plastic powders is stored up on base tube wall, rotary rolling base tube makes powder be uniformly distributed, thus form molding powder last layer at base tube inner and outer surface, plastic-coated steel is socketed in heat-resisting polyethylene tube outside, then in the molding powder last layer of the outer surface of plastic-coated steel, applies one deck thermal-protective coating again.
The material of above-mentioned thermal-protective coating is aerogel blanket, epoxy resin, glass fibre, asbestos, rock wool or silicate.
The present invention adopts heat-resisting polyethylene tube, be called for short PE-RTII pipe, it preserves the good pliability of PE pipe, high thermal conductivity and inertia, resistance to pressure is better simultaneously, at a PE-RTII pipe outer socket reinforcing pipe, PE-RT pipe not only can be prevented to be out of shape, reinforcing pipe selects plastic-coated steel simultaneously, substantially increase steel pipe and PE-RTII pipe in conjunction with soundness, plastic-coated steel outer surface adopts vacuum suction technique, internal surface adopts rotational molding technique, substantially increase plastic-coated steel coating soundness, can resistance to 95 DEG C of high temperature, Long-Time Service is indeformable, can be widely used in city heat supply main pipeline and secondary pipe network engineering.
Accompanying drawing illustrates:
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the structural representation of composite pipe of the present invention in embodiment 1;
Fig. 2 is A-A cross-sectional view in Fig. 1;
Fig. 3 is the structural representation of composite pipe of the present invention in embodiment 2.
1 heat-resisting polyethylene tube, 2 steel pipes, 3 thermal-protective coatings, 4 molding powder last layer, 5 aluminum pipes in figure.
Embodiment:
Example 1
As depicted in figs. 1 and 2, a kind of city heat supply engineering composite pipe, main body is heat-resisting polyethylene tube 1, a heat-resisting polyethylene tube 1 outside socket reinforcing pipe, reinforcing pipe is steel pipe 2, and steel pipe 2 inner and outer wall is coating plastic powder bed 4 respectively, steel pipe 2 outer surface thermal-protective coating 3.
The processing technology of above-mentioned city heat supply engineering composite pipe, adopt heat-resisting polyethylene tube as interior pipe, plastic-coated steel is as interior pipe, plastic-coated steel is using welded steel pipe as base tube, plastic powders is coated in base tube inner and outer surface, then at plastic-coated steel outer surface thermal-protective coating, concrete steps are using welded steel pipe as base tube, first by base tube preheating, surface temperature is made to meet temperature range required by plastic powders, and control with maximum temperature, use vacuum pump will to take out negative formation vacuum in base tube, then by plastispray on the outer surface of base tube, then rotational molding technique is used to base tube internal surface, plastic powders is stored up on base tube wall, rotary rolling base tube makes powder be uniformly distributed, thus form molding powder last layer at base tube inner and outer surface, plastic-coated steel is socketed in heat-resisting polyethylene tube outside, then in the molding powder last layer of the outer surface of plastic-coated steel, applies one deck thermal-protective coating again.
Example 2
As shown in Figure 3, a kind of city heat supply engineering composite pipe, main body is heat-resisting polyethylene tube 1, and a heat-resisting polyethylene tube 1 outside socket reinforcing pipe, reinforcing pipe is aluminum pipe 5.
Claims (4)
1. a city heat supply engineering composite pipe, is characterized in that main body is heat-resisting polyethylene tube, a heat-resisting polyethylene tube outside socket reinforcing pipe.
2. city heat supply engineering composite pipe according to claim 1, is characterized in that reinforcing pipe is steel pipe or aluminum pipe, steel pipe inner wall and outer wall coating plastic powder bed respectively, outer surface of steel tube coating thermal-protective coating.
3. the processing technology of city heat supply engineering composite pipe according to claim 2, it is characterized in that adopting heat-resisting polyethylene tube as interior pipe, plastic-coated steel is as interior pipe, plastic-coated steel is using welded steel pipe as base tube, plastic powders is coated in base tube inner and outer surface, then at plastic-coated steel outer surface thermal-protective coating, concrete steps are using welded steel pipe as base tube, first by base tube preheating, surface temperature is made to meet temperature range required by plastic powders, and control with maximum temperature, use vacuum pump will to take out negative formation vacuum in base tube, then by plastispray on the outer surface of base tube, then rotational molding technique is used to base tube internal surface, plastic powders is stored up on base tube wall, rotary rolling base tube makes powder be uniformly distributed, thus form molding powder last layer at base tube inner and outer surface, plastic-coated steel is socketed in heat-resisting polyethylene tube outside, then in the molding powder last layer of the outer surface of plastic-coated steel, applies one deck thermal-protective coating again.
4. the processing technology of city heat supply engineering composite pipe according to claim 3, is characterized in that the material of thermal-protective coating is aerogel blanket, epoxy resin, glass fibre, asbestos, rock wool or silicate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410531951.1A CN105443879A (en) | 2014-09-28 | 2014-09-28 | Composite pipe used for city heat-supply engineering and processing technology thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410531951.1A CN105443879A (en) | 2014-09-28 | 2014-09-28 | Composite pipe used for city heat-supply engineering and processing technology thereof |
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| Publication Number | Publication Date |
|---|---|
| CN105443879A true CN105443879A (en) | 2016-03-30 |
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| CN201410531951.1A Pending CN105443879A (en) | 2014-09-28 | 2014-09-28 | Composite pipe used for city heat-supply engineering and processing technology thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106151700A (en) * | 2016-08-23 | 2016-11-23 | 常熟市双羽铜业有限公司 | A kind of corrosion-resisting aluminium plastic composite |
| CN106481900A (en) * | 2016-12-16 | 2017-03-08 | 达富俊 | Hot and cold water XRT70 cold-contraction type plastics-lined aluminium alloy pipe, pipe-line system and preparation method thereof |
| CN106764153A (en) * | 2016-12-27 | 2017-05-31 | 重庆永高塑业发展有限公司 | It is easy to flange shape plastic pipe |
| CN107300091A (en) * | 2017-08-25 | 2017-10-27 | 绵阳飞远科技有限公司 | Direct-Buried Heating Pipeline system with corrosion-resistant thermal insulation function |
| CN108825886A (en) * | 2018-07-06 | 2018-11-16 | 何敏 | A kind of one-shot forming technique of inside and outside double corrosion-proof plastic-coated multiple tubes |
| CN109595401A (en) * | 2018-11-22 | 2019-04-09 | 江苏洁润管业有限公司 | A kind of aeroge steel modeling thermal pipe |
| CN109990145A (en) * | 2017-12-30 | 2019-07-09 | 福建纳川管业科技有限责任公司 | Heat-resisting steel skeleton polyethylene plastic composite pipe |
| CN110100803A (en) * | 2019-05-27 | 2019-08-09 | 董瑾 | A kind of novel and multifunctional fishing-rod support |
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| CN201232807Y (en) * | 2008-07-30 | 2009-05-06 | 陕西兴纪龙管道有限公司 | Oxygen-resistant aluminum alloy lining plastic composite pipe |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106151700A (en) * | 2016-08-23 | 2016-11-23 | 常熟市双羽铜业有限公司 | A kind of corrosion-resisting aluminium plastic composite |
| CN106481900A (en) * | 2016-12-16 | 2017-03-08 | 达富俊 | Hot and cold water XRT70 cold-contraction type plastics-lined aluminium alloy pipe, pipe-line system and preparation method thereof |
| CN106481900B (en) * | 2016-12-16 | 2019-03-05 | 成都蕴达管业有限公司 | Hot and cold water XRT70 cold-contraction type plastics-lined aluminium alloy pipe, pipe-line system and preparation method thereof |
| CN106764153A (en) * | 2016-12-27 | 2017-05-31 | 重庆永高塑业发展有限公司 | It is easy to flange shape plastic pipe |
| CN107300091A (en) * | 2017-08-25 | 2017-10-27 | 绵阳飞远科技有限公司 | Direct-Buried Heating Pipeline system with corrosion-resistant thermal insulation function |
| CN109990145A (en) * | 2017-12-30 | 2019-07-09 | 福建纳川管业科技有限责任公司 | Heat-resisting steel skeleton polyethylene plastic composite pipe |
| CN108825886A (en) * | 2018-07-06 | 2018-11-16 | 何敏 | A kind of one-shot forming technique of inside and outside double corrosion-proof plastic-coated multiple tubes |
| CN109595401A (en) * | 2018-11-22 | 2019-04-09 | 江苏洁润管业有限公司 | A kind of aeroge steel modeling thermal pipe |
| CN110100803A (en) * | 2019-05-27 | 2019-08-09 | 董瑾 | A kind of novel and multifunctional fishing-rod support |
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Application publication date: 20160330 |