CN103075611A - High-performance low-cost composite heat insulation pipe - Google Patents
High-performance low-cost composite heat insulation pipe Download PDFInfo
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- CN103075611A CN103075611A CN2013100174916A CN201310017491A CN103075611A CN 103075611 A CN103075611 A CN 103075611A CN 2013100174916 A CN2013100174916 A CN 2013100174916A CN 201310017491 A CN201310017491 A CN 201310017491A CN 103075611 A CN103075611 A CN 103075611A
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Abstract
The invention relates to a high-performance low-cost composite heat insulation pipe which belongs to the technical field of pipelines for conveying fluid. The high-performance low-cost composite heat insulation pipe comprises an inner pipe for conveying fluid, an outer pipe which is cladded on the periphery of the inner pipe and a heat isolation and heat insulation layer which is arranged between the inner pipe and the outer pipe, and is characterized in that the inner pipe is a medium-density polyethylene pipe (PE-RT pipe), a polybutylene pipe (PB pipe), or a random polypropylene-copolymer pipe (PP-R pipe); the outer pipe is a polyvinyl chloride pipe, a polypropylene pipe or a polyethylene pipe (PE pipe); and the heat isolation and heat insulation layer is a polyethylene returned material or new material foam layer, a polyphenylene returned material or new material foam layer or a polypropylene returned material or new material foam layer. After trial use, the heat conduction coefficient of the heat isolation and and heat insulation layer reaches 0.023W/M.K which is equal to the heat conduction coefficient (0.024W/M.K) of foamed polyurethane; and compared with an existing heat insulation pipe which adopts polyurethane, the manufacturing cost of the composite heat insulation pipe is lowered by 35 percent to 75 percent, the high temperature resistance is good, the pipe can work for a long time in an environment with the temperature higher than 70DEG C, the pressure resistance is high, and the pipe can bear static pressure above 3.50Mpa for a long time.
Description
Technical field: the invention belongs to and carry fluid pipeline, particularly a kind of high-performance and low-cost compound thermal insulating pipe.
Background technique: prior art document 1CN101672412A discloses a kind of trimerical composite thermal insulation pipe; " the inside of this thermal insulation pipe is steel pipe; there is polyurethane insulation coating steel pipe outside; the polyurethane insulation coating outside is the waterproof protecting layer that one deck is made of the polyethylene from high pressure process thin walled tube; it is characterized in that: between steel pipe and polyurethane foam insulation layer; one deck polystyrene heat-preservation layer in addition; this polystyrene heat-preservation layer is to make at least two foamed polystyrene cambered plate make-ups that radius and outer diameter of steel pipes match by polystyrene at the foaming heat pressing machine to form; the polystyrene heat-preservation layer is set with waterproof protecting layer outward; leave the space between polystyrene heat-preservation layer and the waterproof protecting layer; polyurethane insulation coating is to put in the gap with the polyurethane foaming rifle, and the injection polyurethane foaming is filled whole cavity and formed." prior art document 2 notice of authorization CN201779406U disclose a kind of thermal insulation pipe, " it comprises an inner tube, and described inner tube is provided with thermal insulation layer outward, and described thermal insulation layer is provided with external protection outward.This thermal insulation pipe inner tube is provided with thermal insulation layer and external protection outward, and thermal insulation layer adopts polyurethane material, and external protection adopts plastic protective film for plastics." prior art document 3 notice of authorization CN202195236U disclose a kind of thermal insulation pipe; " adopt following technological scheme: a kind of thermal insulation pipe, it comprises an inner tube, described inner tube is provided with thermal insulation layer outward; described thermal insulation layer is provided with external protection outward, and described external protection is aluminium foil layer or plastic film layers.The material of described thermal insulation layer is polyurethane material.Described inner tube is plastic tube or metal tube." prior art document 4 notice of authorization CN202402812U disclose a kind of thermal insulation pipe; " a kind of thermal insulation pipe; body comprises three-decker; wherein internal layer is basic unit; the mesosphere is thermal insulation layer, and skin is protective layer, and wherein basic unit is made of the PP-R extrusion molding; thermal insulation layer is made of EVA foaming extrusion molding, and protective layer is that the PE extrusion molding consists of." " wherein basic unit is made of the PP-R extrusion molding, and thermal insulation layer is made of EVA foaming extrusion molding, and protective layer is that the PE extrusion molding consists of.Three layers of synchronous production closely link to each other, and organically become one.”
In actual use, the insulating of prior art document 1,2,3 disclosed thermal insulation pipes has all used the polyurethane high molecule material that price is high and rise steadily, so cost is high; Although the insulating of prior art document 4 disclosed thermal insulation pipes does not adopt polyurethane material, consist of thermal insulation layer by EVA foaming extrusion molding and fail to adopt the low feed back of price, and inner tube only limits to PP-R extrusion molding formation.Know that those of ordinary skill in the art's common-sense PP-R pipe heat-resisting quantity is poor, the long-term work temperature can not surpass 70 ℃, and resistance to pressure is poor, can not bear for a long time the above static pressure of 3.50Mpa.This shows, study and design a kind of high temperature resistant, resistance to pressure is high, the high-performance and low-cost compound thermal insulating pipe of manufacture cost decrease is necessary.
Summary of the invention: the objective of the invention is to overcome the deficiencies in the prior art, study and design a kind of high temperature resistant, resistance to pressure is high, the high-performance and low-cost compound thermal insulating pipe of manufacture cost decrease.
The object of the present invention is achieved like this: a kind of high-performance and low-cost compound thermal insulating pipe, include and carry the fluid inner tube, be coated on the outer tube of inner tube periphery, insulating between the inner and outer pipe is characterized in that described inner tube is the medium density polyethylene pipe, i.e. the PE-RT pipe, or Polybutylene Pipe, be the PB pipe, or polypropylene random copolymer pipe, i.e. PP-R pipe; Described outer tube is polyvinyl chloride pipe, or polypropylene tube, or polyethylene pipe, i.e. the PE pipe; Described insulating is polyethylene feed back or virgin material foaming layer, or polyphenyl alkene feed back or virgin material foaming layer, or polypropylene feed back or virgin material foaming layer.Described virgin material refers to the raw material that uses first after this synthesis of polymer material; Feed back refers to the raw material that used this macromolecular material virgin material reuses through recovery.The commodity feed back is divided into superfine, one-level, secondary by its quality.
High-performance and low-cost complex heat-preservation pipe manufacturing method of the present invention comprises successively carries fluid to extrude operation with inner tube, inner tube Vacuum shaping operation, inner tube cooling forming operation, inner tube periphery composite, insulating layer foamed process, the insulating molding procedure, the compound outer tube of insulating periphery is extruded operation, outer tube cooling forming operation, the air-dry operation in outer tube surface, outer tube-surface coding operation, scale cutting action, Checking of finished products operation, the finished product packing operation, it is characterized in that described operation inner tube extrude operation to outer tube extrude operation all be in the same unitary mould of 1200 centimetres of length in conjunction with the traction in carry out continuously.Described operation inner tube is extruded operation and adopt the PP-R macromolecule raw material to inner tube cooling forming operation, or PE-RT macromolecule raw material, or the PB macromolecule raw material heats through plastic extruder, temperature is 175 ± 5 ℃ when entering 20 centimetres of calibration sleeves of length of unitary mould inlet, length 30 centimetres of annular sections in mould, degree of vacuum is the inner tube Vacuum shaping district typing of-0.55 ± 0.05MPa, the inner tube of typing is through drawing inner tube cooling forming district cooling forming to the mould, first through 20 centimetres of length, the water cooling shaping area that draws the room temperature water injection that is connected to pressure 1.3 ± 0.1MPa, by 30 centimetres of annular sections of length, introduce the air cooling forming district of atmospheric air, cooling forming becomes inner tube.Described insulating foamed process is to the insulating molding procedure, adopt feed back or virgin material PE macromolecule raw material, or feed back or virgin material polypropylene macromolecule raw material, or feed back or virgin material polyphenyl alkene macromolecule raw material, feed back or virgin material polypropylene macromolecule raw material are heated to 180 ± 10 ℃ through foam extrusion machine and reach melted state, when the screw rod in foam extrusion machine is advanced into adding medium section regional temperature in the foam extrusion machine and reaches 140 ± 10 ℃, add butane with 0.75 ± 0.25MPa pressure, or methane, or propane pressurized gas, the Screw Extrusion of continuation in foam extrusion machine is to the foamed material import of unitary mould, temperature remains on 85 ± 5 ℃ when clamp-oning the foamed material compressing area of unitary mould, pressure remains on 1.2 ± 0.1MPa, is extruded into the insulating foaming compound molding district of unitary mould; Described insulating foaming, the recombination region that is extruded into unitary mould is that the length that is surrounded on the inner tube periphery of cooling forming is 15 centimetres of annular sections, when being foamed into the hole-closing structure insulating that is full of bubble, be compound in the inner tube periphery, be 15 centimetres of annular sections, the insulating shaping area cooling forming of introducing the air at room temperature cooling through length again, become insulating.Described outer tube is extruded operation to outer tube cooling forming operation, adopt the vinyl polymer raw material, or polypropylene macromolecule raw material, or the PVC macromolecular raw material heats through plastic extruder, temperature remains on 190 ± 10 ℃ when entering the outer tube extruded stock import in the unitary mould, pressure remains on 1.3 ± 0.1MPa, be extruded into and be surrounded on the insulating periphery, length is 5 centimetres of ring-type outer tube shaping areas, the typing outer tube is along with inner tube and the insulating that is compound in the inner tube periphery pull out outside the mould outlet of unitary mould, again through the room temperature water cooling forming, become and have inner tube-insulating-high-performance and low-cost compound thermal insulating pipe that outer tube consists of.
The high-performance and low-cost compound thermal insulating pipe that the invention process obtains has compared with prior art shown following beneficial effect through on probation: the manufacture cost that 1, guaranteed under the identical usability condition decrease.All used price polyurethane high molecule material high and that rise steadily different from the insulating of prior art document 1,2,3 disclosed thermal insulation pipes, the present invention is after manufacture method is improved, adopt on the heat preservation and insulation closely with polyurethane, and price is compared 40% the virgin material that descended 80% PE, polypropylene, polyphenyl alkene feed back or prices with polyurethane.Be heated to 180 ± 10 ℃ through foam extrusion machine and reach melted state, when being advanced into 140 ± 10 ℃ of adding medium section temperature in the foam extrusion machine, screw rod adds butane with 0.75 ± 0.25MPa pressure, or methane, or propane pressurized gas, continuation is through the foamed material import of Screw Extrusion to unitary mould, the foamed material compressing area temperature of clamp-oning unitary mould remains on 85 ± 5 ℃, pressure remains on 1.2 ± 0.1MPa, be extruded into the inner tube periphery, become insulating through the room temperature cooling forming, the insulating of making like this has the closed pore bubble structure identical with polyurethane foam, and the thickness that has increased insulating in making reaches more than 5.5 millimeters, the thermal conductivity of insulating reaches 0.023W/M.K after tested, suitable with the thermal conductivity 0.024W/M.K of polyurethane foam, and compound thermal insulating pipe of the present invention is compared the manufacture cost 35-75% that descended with the prior art thermal insulation pipe that adopts polyurethane.
2, heat-resisting quantity is good, can long-term work surpass under 70 ℃ of temperature environments, and resistance to pressure is high, can bear for a long time the above static pressure of 3.50Mpa.Compared by the prior art document 4 disclosed thermal insulation pipes that the PP-R extrusion molding consists of with inner tube, the inner tube that has also adopted the PE-RT extrusion molding to consist of among the present invention, PE-RT is the remarkable and stable medium density polyethylene class plastic cement of a kind of thermal characteristics that in recent years comes into vogue at tubing industry, it is the copolymer of ethene and octene, can long-term work surpass under 70 ℃ of environment in temperature, and resistance to pressure is high, can bear for a long time the above static pressure of 3.50Mpa, it is good high temperature resistant, anti-performance and the pliability suppressed, wholesomeness, become and substitute the PP-R pipe, be applied even more extensively in panel type heating system, such as floor heating, wall panel heating, in the ceiling board radiant heating engineering, be more suitable for being used in the central air-conditioning pipe system, under the water-supply pipeline of solar water-heating system and large parking lot and the expressway in the snow melt pipe-line system.Moreover, also adopted the PB pipe that is consisted of by the synthetic high molecular polymer polybutylene of butene-1 among the present invention, polybutylene is a kind of macromolecule inert polymer, because the stability of its structure of molecule, than the polyethylene that is both the olefines material (PE) and polypropylene (PP), material property is more stable, has higher high-temperature capability, higher creep-resistant property, better chemical stability, and the characteristics of anti-low temperature brittleness.The density of PB pipe is 930kg/m
3Close with the PE pipe, but has very high temperature tolerance, endurance, chemical stability and plasticity, tasteless, nontoxic, odorless, temperature applicable range reaches-30 ℃ to+100 ℃, has cold-resistant, heat-resisting, withstand voltage, non-corrosive, burn into non-scaling not, and energy resisting ageing for long time characteristics are arranged, reach 50-100 working life.Lightweight, ductility is good, and construction is simple, and freeze proof good heat resistance in-20 ℃ situation, has preferably low-temperature impact resistance, and tubing can bursting by freezing, and after thawing, tubing can recover former state; Also can anti-100 ℃ high temperature, be nontoxic, the tasteless and best serviceability of generally acknowledging, the tubing that wholesomeness is best.Be widely used as water supply hygiene pipe and hot-water line, heating pipe, the industrial pipe of idle call, agriculture using and the gardening pipe, fire-fighting is used with automatic sprinkler fire-extinguishing system and is managed, high standard requirement architecture heating system hot-water line etc.
3, has quite high cost performance.Because insulating does not adopt the high polyurethane foam of common price to make, although inner tube has adopted the common PP-R pipe of the cost ratio higher better PE-RT pipe of therefore performance, PB pipe, the 35-75% but the insulating fabricating cost has significantly descended, the high-performance and low-cost compound thermal insulating pipe that is enough to the invention process is obtained has quite high cost performance, therefore still have the quite high market competitiveness, will inevitably commercially achieve success.
Description of drawings: Fig. 1 is the schematic representation that meets thematic structure of the present invention.
Embodiment: by reference to the accompanying drawings implementation detail of the present invention is described as follows:
As shown in Figure 1, a kind of high-performance and low-cost compound thermal insulating pipe, include and carry fluid inner tube 1, be coated on the outer tube 2 of inner tube periphery, the insulating 3 between the inner and outer pipe, it is characterized in that: described inner tube is the medium density polyethylene pipe, be the PE-RT pipe, or Polybutylene Pipe, i.e. PB pipe, or polypropylene random copolymer pipe, i.e. PP-R pipe; Described outer tube is polyvinyl chloride pipe, or polypropylene tube, or polyethylene pipe, i.e. the PE pipe; Described insulating is polyethylene feed back or virgin material foaming layer, or polyphenyl alkene feed back or virgin material foaming layer, or polypropylene feed back or virgin material foaming layer.In the implementation, no matter the size of inner tube diameter, the thickness of insulating of the present invention is increased to more than 5.5 millimeters, guarantees that the thermal conductivity of insulating reaches below the 0.023W/M.K.
The high-performance and low-cost compound thermal insulating pipe that implementation of the present invention obtains, distinguish according to inner tube material, can be divided into PE-RT pipe, PB pipe, PP-R pipe three large series, each series is divided into 9 kinds according to the different of outer tube material of insulating and with it cooperation, so the high-performance and low-cost compound thermal insulating pipe of 27 different cultivars is arranged altogether.
Wherein the polyolefin ester such as the polyethylene that in technical solution of the present invention, proposes of insulating, polyphenyl alkene, polypropylene, those of ordinary skill in the art's common-sense is known, according to manufacture method of the present invention, other polyolefin esters, rubber and plastic, nylon etc. all can be foamed into insulating through above-mentioned technique.
According to market demand, the high-performance and low-cost compound thermal insulating pipe of different purposes, can select polyethylene, polyphenyl alkene, the foaming of polypropylene virgin material to make insulating, also can select cost lower but insulating is made in polyethylene, polyphenyl alkene, the foaming of polypropylene feed back that performance requirement is relatively low.
Claims (1)
1. a high-performance and low-cost compound thermal insulating pipe includes and carries fluid inner tube (1), is coated on the outer tube (2) of inner tube periphery, and the insulating between the inner and outer pipe (3) is characterized in that
---described inner tube is the medium density polyethylene pipe, and namely PE-RT manages ,/or Polybutylene Pipe, namely PB manages ,/or polypropylene random copolymer pipe, i.e. PP-R pipe;
---described outer tube is polyvinyl chloride pipe ,/or polypropylene tube ,/or polyethylene pipe, i.e. PE pipe;
---described insulating is polyethylene feed back/or virgin material foaming layer ,/or polyphenyl alkene feed back/or the virgin material foaming layer ,/or the polypropylene feed back/or the virgin material foaming layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013100174916A CN103075611A (en) | 2013-01-18 | 2013-01-18 | High-performance low-cost composite heat insulation pipe |
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| CN2013100174916A CN103075611A (en) | 2013-01-18 | 2013-01-18 | High-performance low-cost composite heat insulation pipe |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104019291A (en) * | 2014-06-16 | 2014-09-03 | 解厚祥 | Composite tube special for air conditioner and tube fitting of composite tube |
| CN105965903A (en) * | 2016-05-05 | 2016-09-28 | 日丰企业集团有限公司 | Novel prefabricated directly-buried thermal insulation PPR complex pipeline and production method thereof |
| CN107061877A (en) * | 2017-06-12 | 2017-08-18 | 奥品科技有限公司 | A kind of new prefabricated thermal insulation is anti-to shine plastic composition pipeline and preparation method thereof |
| CN107654759A (en) * | 2017-09-28 | 2018-02-02 | 平乐县顺联管业有限公司 | A kind of soft or hard copolymerization pipes of PVC and preparation method thereof |
| CN107698910A (en) * | 2017-09-29 | 2018-02-16 | 安徽德全新型建材科技有限公司 | A kind of thermal insulating hot water pipe |
| CN110067898A (en) * | 2019-05-31 | 2019-07-30 | 天津永高塑业发展有限公司 | A kind of flexible laying is prefabricated direct-buried to keep the temperature compound thermal pipe and its production method |
| CN112032474A (en) * | 2020-08-26 | 2020-12-04 | 天津市伟星新型建材有限公司 | Phase-change energy-storage type condensation-preventing composite pipeline and preparation method thereof |
| CN114484090A (en) * | 2022-01-06 | 2022-05-13 | 临海伟星新型建材有限公司 | Pressure-resistant foam plastic foaming heat-insulation pipe and preparation method thereof |
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Patent Citations (4)
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| JPH10110056A (en) * | 1996-10-08 | 1998-04-28 | Mitsubishi Electric Corp | Production of foamed heat insulating material and heat-insulated box made therefrom |
| CN101182894A (en) * | 2006-11-14 | 2008-05-21 | 苏建元 | Polyethylene foam rise thermal insulation delivery pipe and production process thereof |
| CN201377657Y (en) * | 2009-04-07 | 2010-01-06 | 苏建元 | A polyethylene foam insulation water delivery pipe |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104019291A (en) * | 2014-06-16 | 2014-09-03 | 解厚祥 | Composite tube special for air conditioner and tube fitting of composite tube |
| CN105965903A (en) * | 2016-05-05 | 2016-09-28 | 日丰企业集团有限公司 | Novel prefabricated directly-buried thermal insulation PPR complex pipeline and production method thereof |
| CN105965903B (en) * | 2016-05-05 | 2018-09-21 | 日丰企业集团有限公司 | Prefabricated direct-buried heat preservation PPR compound pipeline complex pipelines of one kind and preparation method thereof |
| CN107061877A (en) * | 2017-06-12 | 2017-08-18 | 奥品科技有限公司 | A kind of new prefabricated thermal insulation is anti-to shine plastic composition pipeline and preparation method thereof |
| CN107654759A (en) * | 2017-09-28 | 2018-02-02 | 平乐县顺联管业有限公司 | A kind of soft or hard copolymerization pipes of PVC and preparation method thereof |
| CN107654759B (en) * | 2017-09-28 | 2023-09-29 | 桂林金塑塑胶有限公司 | PVC (polyvinyl chloride) soft and hard copolymerization pipe and manufacturing method thereof |
| CN107698910A (en) * | 2017-09-29 | 2018-02-16 | 安徽德全新型建材科技有限公司 | A kind of thermal insulating hot water pipe |
| CN110067898A (en) * | 2019-05-31 | 2019-07-30 | 天津永高塑业发展有限公司 | A kind of flexible laying is prefabricated direct-buried to keep the temperature compound thermal pipe and its production method |
| CN112032474A (en) * | 2020-08-26 | 2020-12-04 | 天津市伟星新型建材有限公司 | Phase-change energy-storage type condensation-preventing composite pipeline and preparation method thereof |
| CN114484090A (en) * | 2022-01-06 | 2022-05-13 | 临海伟星新型建材有限公司 | Pressure-resistant foam plastic foaming heat-insulation pipe and preparation method thereof |
| CN114484090B (en) * | 2022-01-06 | 2023-11-07 | 临海伟星新型建材有限公司 | Pressure-resistant foam plastic foaming heat-insulating pipe and preparation method thereof |
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Application publication date: 20130501 |