CN114962861A - Deep geothermal water conveying pipeline and preparation method thereof - Google Patents
Deep geothermal water conveying pipeline and preparation method thereof Download PDFInfo
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- CN114962861A CN114962861A CN202210511901.1A CN202210511901A CN114962861A CN 114962861 A CN114962861 A CN 114962861A CN 202210511901 A CN202210511901 A CN 202210511901A CN 114962861 A CN114962861 A CN 114962861A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 42
- 238000004804 winding Methods 0.000 claims abstract description 29
- 239000002131 composite material Substances 0.000 claims abstract description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 11
- 239000010439 graphite Substances 0.000 claims abstract description 11
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 10
- 238000001125 extrusion Methods 0.000 claims abstract description 6
- 229910021383 artificial graphite Inorganic materials 0.000 claims abstract description 5
- 229910021382 natural graphite Inorganic materials 0.000 claims abstract description 5
- 239000004831 Hot glue Substances 0.000 claims description 29
- 239000011248 coating agent Substances 0.000 claims description 23
- 238000000576 coating method Methods 0.000 claims description 23
- 238000001816 cooling Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 5
- 238000007765 extrusion coating Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- 238000004513 sizing Methods 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 230000002708 enhancing effect Effects 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 85
- 238000005187 foaming Methods 0.000 description 5
- 239000006260 foam Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000012792 core layer Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/029—Shape or form of insulating materials, with or without coverings integral with the insulating materials layered
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a deep geothermal water conveying pipeline and a preparation method thereof, wherein the deep geothermal water conveying pipeline comprises an inner layer pipe, a middle winding layer and an outer layer pipe, the inner layer pipe is PE or PERT formed by extrusion, the middle winding layer is high heat conduction material wound on the outer pipe wall of the inner layer pipe, the high heat conduction material is a natural graphite film, an artificial graphite film, a graphene composite film or a graphite composite film, the in-plane heat conduction rate is more than 400W/mK, and the vertical heat conduction rate is less than 20W/mK; the outer layer pipe is PE or PERT which is extruded and coated outside the middle winding layer. The deep geothermal water conveying pipeline can realize the premise of not influencing the pressure resistance of the pipe, does not reduce the overall heat conductivity of the pipeline, reduces the heat loss of the pipeline when the pipeline conveys hot water in a region with lower temperature close to the ground environment by enhancing the heat conductivity of the pipeline middle layer material along the axial direction of the pipeline, realizes the heat insulation effect by a heat management mode, and enables more heat in a middle and deep layer to be conveyed to the ground for use.
Description
Technical Field
The invention belongs to the field of deep geothermal pipelines, and particularly relates to a deep geothermal water conveying pipeline and a preparation method thereof.
Background
The field of the medium-deep geothermal energy of renewable energy sources is widely concerned at present, the utilization of the deep geothermal energy needs to extract hot water under the well with the depth of more than 2500 meters, and the heat energy in the deep underground is transmitted to the ground for use through heat exchange, the foaming heat-insulating pipeline in the actual use scheme is a main pipeline product, and their derived products also include foamed composite pipes, core layer foamed pipes, etc., but the foamed layer in the general foamed pipe has low pressure resistance, especially in the high-temperature and high-pressure water medium environment of 2500m, the foam holes in the pipes and the foamed layer can be subjected to great pressure, so that the foam holes are extruded and deformed, even the foam holes are broken to enter water, the heat preservation performance is greatly reduced, meanwhile, heat energy can be better transmitted to the ground only by heat exchange to a certain degree in a deep water medium environment, and the heat conductivity of the foaming pipeline is reduced, but the heat exchange in the deep area is not facilitated. In order to improve the strength of the foaming pipe, some patent CN1105743C mentions that rigid ions such as calcium carbonate and talcum powder are added into the foaming system to improve the rigidity thereof, but under a high pressure of 25MPa, the cells are also easily extruded, and it is difficult to achieve a better effect in the deep geothermal field.
The invention realizes the effect of heat preservation of hot water of deep geothermal heat in the pipeline without using a mode of reducing heat conductivity by foaming, and can realize axial conduction of most heat in the pipeline along with the pipeline by adding a layer of in-plane ultrahigh heat conductivity in the pipeline, and the heat conductivity in the direction vertical to the plane is relatively lower and can be different by more than one order of magnitude. The design idea of realizing the hot water delivery of the deep geothermal pipe through the anisotropic high heat conduction material is to manufacture a three-layer structure composite pipeline, wherein the inner layer and the outer layer are made of PE or PERT with good heat resistance, the middle layer is made of materials such as a natural graphite film, an artificial graphite film, a graphene composite film, a graphite composite film and the like with ultrahigh heat conductivity of more than 400W/mK in the plane, but the heat conductivity of the vertical plane of the materials is only 10 to 20W/mK, so that the deep geothermal pipe has very good anisotropy, and more heat can be conducted in the plane. The high-heat-conductivity membrane material is compounded on the pipeline through hot melt adhesive on the basis of extruding an inner-layer pipeline PE or PERT material with a certain thickness, and a layer of hot melt adhesive is further extruded on the outer layer to bond the outer-layer PE or PERT material and shape, so that the high-heat-conductivity layer is well compounded on the middle layer of the pipeline material. Thereby reduce the floor heating pipe and carry the radiating volume of heat to the environment outside the pipeline in the hot water in the region that the temperature is less than the pipeline hot water temperature, can not influence in the higher region of deep ambient temperature simultaneously, at the heat-conduction of high temperature region to intraductal water, can carry deep geothermol power to ground through the design theory of thermal management on the whole and use more efficiently.
Disclosure of Invention
Aiming at the defects of the existing intermediate-deep geothermal pipeline in the prior art, the invention aims to provide a deep geothermal water conveying pipe and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the deep geothermal water conveying pipeline is characterized by comprising an inner layer pipe, a middle winding layer and an outer layer pipe, wherein the inner layer pipe is made of PE or PERT formed by extrusion, the middle winding layer is made of high heat conduction material wound on the outer pipe wall of the inner layer pipe, the high heat conduction material is a natural graphite film, an artificial graphite film, a graphene composite film or a graphite composite film, the in-plane heat conductivity of the high heat conduction material is more than 400W/mK, and the vertical heat conductivity of the high heat conduction material is less than 20W/mK; the outer layer pipe is PE or PERT which is extruded and coated outside the middle winding layer.
Further, a layer of hot melt adhesive is arranged between the inner layer pipe and the middle winding layer and between the middle winding layer and the outer layer pipe, the hot melt adhesive is a PE hot melt adhesive or an acrylate adhesive, and the thickness of the hot melt adhesive is 0.5-3.0 mm. The middle winding layer realizes the reinforced adhesion on the outer side of the inner layer pipe through hot melt adhesive.
Furthermore, when the high-heat-conduction material is wound on the outer pipe wall of the inner pipe, the included angle between the high-heat-conduction material and the central axis of the inner pipe is 30-85 degrees, and the thickness of the middle winding layer is 0.05-5.00 mm.
Furthermore, when the high-heat-conduction material is wound on the outer pipe wall of the inner-layer pipe, the included angle between the high-heat-conduction material and the central axis of the inner-layer pipe is 50-60 degrees, and the thickness of the middle winding layer is 0.5-3.00 mm.
Furthermore, the high thermal conductivity material has an in-plane thermal conductivity of 400 to 1200W/mK and a vertical thermal conductivity of 10 to 20W/mK.
A preparation method of a deep geothermal water conveying pipeline comprises the following steps:
1) melting and extruding a PE or PERT inner layer pipe raw material by using a single-screw extruder, wherein the temperature of a machine barrel zone is 180-200 ℃, the temperature of a die head zone is 190-200 ℃, and then carrying out vacuum sizing and cooling;
2) extruding and coating a layer of hot melt adhesive on the outer side of the cooled PE or PERT inner layer pipe, then winding and coating a layer of high heat conduction material to form an intermediate winding layer, and then extruding and coating a layer of hot melt adhesive again;
3) and (3) finally extruding and coating a layer of PE or PERT outer layer pipe material outside the pipeline obtained in the step 2) by using a single-screw extruder, wherein the temperature of a machine barrel zone is 180-200 ℃, the temperature of a die head zone is 190-200 ℃, and after extrusion coating, shaping, cooling and offline are performed.
The beneficial effect that this application was got is:
the deep geothermal water conveying pipeline prepared by the invention can realize the premise of not influencing the pressure resistance of the pipe, does not reduce the overall heat conductivity of the pipeline, reduces the heat loss of the pipeline when the pipeline conveys hot water in a region with lower temperature close to the ground environment by enhancing the heat conductivity of the material of the middle layer of the pipeline along the axial direction of the pipeline, realizes the heat insulation effect by a heat management mode, and enables more heat of the middle and deep layer to be conveyed to the ground for use.
Drawings
FIG. 1 is a flow chart of the process for preparing a deep geothermal water pipeline according to the present invention;
FIG. 2 is a schematic view of the structure of the deep geothermal water transporting pipe according to the present invention;
in fig. 2: 1-outer layer tube, 2-inner high heat conduction layer and 3-inner layer tube.
Detailed Description
The present invention is further illustrated by the following examples, which should not be construed as limiting the scope of the invention.
Example (b): comparison with FIG. 2
A deep geothermal water conveying pipeline comprises an inner layer pipe 3, an intermediate winding layer (namely an in-plane high heat conduction layer 2) and an outer layer pipe 1, wherein the inner layer pipe is made of PE or PERT formed by extrusion, the intermediate winding layer is made of high heat conduction material wound on the outer pipe wall of the inner layer pipe, the high heat conduction material is a natural graphite film, an artificial graphite film, a graphene composite film or a graphite composite film, the in-plane heat conduction rate of the high heat conduction material is more than 400W/mK, and the vertical heat conduction rate of the high heat conduction material is less than 20W/mK; the outer layer pipe is PE or PERT which is extruded and coated outside the middle winding layer.
One layer of hot melt adhesive is arranged between the inner layer pipe and the middle winding layer and between the middle winding layer and the outer layer pipe, the hot melt adhesive is a PE hot melt adhesive or an acrylate adhesive, and the thickness of the hot melt adhesive is 0.5-1.5 mm.
When the high heat conduction material is wound on the outer pipe wall of the inner pipe, the included angle between the high heat conduction material and the central axis of the inner pipe is 30-85 degrees, preferably 50-60 degrees; the thickness of the middle winding layer is 0.05 mm-5.00 mm, preferably 0.5 mm-3.00 mm.
The graphene composite film in embodiment 1 of the present application is purchased from senxi element material science and technology ltd, in Changzhou, and the graphene composite film in embodiment 2 is purchased from shanghai alkene person new material science and technology development ltd.
Example 1:
a method for preparing a deep geothermal water conveying pipeline (process flow is shown in figure 1) comprises the following steps:
1) inner layer extrusion: extruding a PE pipe by using a single-screw extruder, wherein the temperature of a machine barrel zone is 180 ℃, the temperature of a die head zone is 190 ℃, then carrying out vacuum sizing, and cooling, wherein the vacuum degree is 0.1 MPa;
2) coating of a middle high heat conduction layer: a layer of hot melt adhesive is extruded and coated outside the PE inner-layer pipe by using a coating machine, the temperature of the coating machine is set to be 160 ℃, then a layer of graphene composite film with the thickness of 1mm is wound and coated, the included angle between the graphene composite film and the central axis of the inner-layer pipe is 50 degrees, the heat conductivity in the plane of the graphene composite film is 1200W/mK, and the heat conductivity in the vertical direction is 10W/mK. And then, extruding and coating a layer of 0.1mm hot melt adhesive on the outer side of the graphite composite film layer, wherein the hot melt adhesives are PE hot melt adhesives, and the coating thickness of the hot melt adhesives is 0.2 mm.
3) Extruding and coating the outer layer: and 3) finally extruding a layer of PE outer layer pipe material on the outer side of the pipeline obtained in the step 2) by using a single-screw extruder, wherein the temperature of a machine barrel zone is 180 ℃, the temperature of a die head zone is 190 ℃, and the PE outer layer pipe material is subjected to shaping cooling and offline after extrusion coating.
The composite pipe produced in example 1 had a size DN110 × SDR11, an overall outside diameter of 110mm and an overall wall thickness of about 10mm, wherein the inner PE tube had a thickness of 2 mm.
Example 2:
a method for preparing a deep geothermal water conveying pipeline (process flow is shown in figure 1) comprises the following steps:
1) inner layer extrusion: extruding a PERT II type pipe by using a single-screw extruder, wherein the temperature of a machine barrel zone is 185 ℃, the temperature of a die head zone is 195 ℃, then carrying out vacuum sizing, and cooling, wherein the vacuum degree is 0.1 MPa;
2) coating of the middle high heat conduction layer: and extruding and coating a layer of hot melt adhesive outside the PE inner-layer pipe by using a coating machine, setting the temperature of the coating machine to be 160 ℃, and then winding and coating a 2mm graphite composite film layer, wherein the included angle between the graphite composite film layer and the central axis of the inner-layer pipe is 55 degrees, the in-plane thermal conductivity of the graphite composite film layer is 800W/mK, and the vertical thermal conductivity of the graphite composite film layer is 15W/mK. And then, extruding and coating a layer of hot melt adhesive of 0.1mm on the outer side of the graphite composite film layer, wherein the hot melt adhesives are PE hot melt adhesives, and the coating thickness of the hot melt adhesives is 0.2 mm.
3) Extruding and coating the outer layer: and (3) finally extruding and coating a layer of PERT II type pipe outside the pipeline obtained in the step 2) by using a single-screw extruder, wherein the temperature of a machine barrel zone is 180 ℃, the temperature of a die head zone is 190 ℃, and after extrusion coating, shaping, cooling and discharging.
The composite pipe produced in example 2 had a size DN110 × SDR11, an overall outside diameter of 110mm and an overall wall thickness of about 10mm, wherein the inner PE tube had a thickness of 2 mm.
And (3) actual performance test:
it is known that the mobility is poor through the bottom of the geothermal well, and a certain flow dead zone exists, which indicates that in the area with the highest temperature at the bottom, the heat transfer is mainly based on heat conduction and the heat convection is less. Under the action of the water pumping pressure of the water pump, the flow speed at the outlet is the largest and can reach 1.06m/s, the flow speed is reduced along with the increase of the depth, the flow speed tends to be in a stable laminar state under the depth of 800m, and the average flow speed is about 0.2 m/s.
The inlet temperature of the pipe is 20 ℃ (the principle shows that low-temperature water is injected into the deep underground from the ground, the temperature of the deep underground is about 95 ℃), the injected cold water is heated to be similar to the temperature of the deep outlet through heat exchange, and then the cold water returns to the ground to realize the heat supply effect, so that the cold water inlet is arranged, the hot water outlet is arranged at the outlet to meet the heat supply requirement), the geothermal gradient is 3 ℃/100m, and the pipe material is tested and compared under the condition that the highest temperature of 2500m reaches 95 ℃. For the flow field, the pumping pressure of the outlet of the inner pipe is about 0.7Mpa, the average flow velocity of the outlet is 1m/s, and the comprehensive flow is 25m 3 H is used as the reference value. The PE and PERT pipes (DN 110 and SDR11 pipes manufactured by Zhejiang Weixing new building materials Co., Ltd.) of the same specification were cooled from the deep geothermal temperature of 95 ℃ to 42 ℃ and 41 ℃ respectively, while the pipe outlet temperature of example 1 was reduced to 58 ℃ and the pipe outlet temperature of example 2 was reduced to 55 ℃. Other mechanical properties can meet the hot water conveying requirement of the deep geothermal pipe.
The statements in this specification merely set forth a list of implementations of the inventive concept and the scope of the present invention should not be construed as limited to the particular forms set forth in the examples.
Claims (6)
1. A deep geothermal water conveying pipeline is characterized by comprising an inner layer pipe, a middle winding layer and an outer layer pipe, wherein the inner layer pipe is made of PE or PERT formed by extrusion, the middle winding layer is made of high heat conduction materials wound and arranged on the outer wall of the inner layer pipe, the high heat conduction materials are natural graphite films, artificial graphite films, graphene composite films or graphite composite films, the in-plane heat conductivity of the high heat conduction materials is more than 400W/mK, and the vertical heat conductivity of the high heat conduction materials is less than 20W/mK; the outer layer pipe is PE or PERT which is extruded and coated outside the middle winding layer.
2. The deep geothermal water conveying pipeline according to claim 1, wherein a layer of hot melt adhesive is arranged between the inner layer pipe and the intermediate winding layer and between the intermediate winding layer and the outer layer pipe, the hot melt adhesive is a PE hot melt adhesive or an acrylate adhesive, and the thickness of the hot melt adhesive is 0.05-0.15 mm, preferably 0.1 mm.
3. The deep geothermal water conveying pipeline as claimed in claim 1, wherein the high thermal conductivity material is wound on the outer pipe wall of the inner pipe at an angle of 30-85 ° to the central axis of the inner pipe, and the thickness of the middle winding layer is 0.05-5.00 mm.
4. The deep geothermal water conveying pipeline as claimed in claim 3, wherein the high thermal conductivity material is wound on the outer pipe wall of the inner pipe at an angle of 50-60 ° with respect to the central axis of the inner pipe, and the thickness of the middle winding layer is 0.5-3.00 mm.
5. The deep geothermal water transport pipe of claim 1, wherein the high thermal conductivity material has an in-plane thermal conductivity of 400-1200W/mK and a vertical thermal conductivity of 10-20W/mK.
6. The method of claim 1, comprising the steps of:
1) melting and extruding a PE or PERT inner layer pipe raw material by using a single-screw extruder, wherein the temperature of a machine barrel zone is 180-200 ℃, the temperature of a die head zone is 190-200 ℃, and then carrying out vacuum sizing and cooling;
2) extruding and coating a layer of hot melt adhesive on the outer side of the cooled PE or PERT inner layer pipe, then winding and coating a layer of high heat conduction material to form an intermediate winding layer, and then extruding and coating a layer of hot melt adhesive again;
3) and (3) finally extruding and coating a layer of PE or PERT outer layer pipe material outside the pipeline obtained in the step 2) by using a single-screw extruder, wherein the temperature of a machine barrel zone is 180-200 ℃, the temperature of a die head zone is 190-200 ℃, and after extrusion coating, shaping, cooling and offline are performed.
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| CN202210511901.1A CN114962861A (en) | 2022-05-12 | 2022-05-12 | Deep geothermal water conveying pipeline and preparation method thereof |
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| CN202210511901.1A CN114962861A (en) | 2022-05-12 | 2022-05-12 | Deep geothermal water conveying pipeline and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650354A (en) * | 2012-05-14 | 2012-08-29 | 陈建伟 | Aluminum-plastic composite pipe with high strength and high heat conductivity |
| KR20170036218A (en) * | 2015-09-24 | 2017-04-03 | 강계수 | The pipe manufacturing method and Plastic pipe for heat conductivity containing graphene |
| CN109154060A (en) * | 2016-05-10 | 2019-01-04 | 莫门蒂夫性能材料股份有限公司 | For orienting the thermal cracking graphite pipe device of thermal management |
| CN113864539A (en) * | 2021-09-14 | 2021-12-31 | 临海伟星新型建材有限公司 | Novel low-heat-conduction high-temperature-resistant plastic pipeline and preparation method thereof |
| CN114321511A (en) * | 2021-12-14 | 2022-04-12 | 临海伟星新型建材有限公司 | Capillary wound heat-preservation plastic pipeline and preparation method thereof |
-
2022
- 2022-05-12 CN CN202210511901.1A patent/CN114962861A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650354A (en) * | 2012-05-14 | 2012-08-29 | 陈建伟 | Aluminum-plastic composite pipe with high strength and high heat conductivity |
| KR20170036218A (en) * | 2015-09-24 | 2017-04-03 | 강계수 | The pipe manufacturing method and Plastic pipe for heat conductivity containing graphene |
| CN109154060A (en) * | 2016-05-10 | 2019-01-04 | 莫门蒂夫性能材料股份有限公司 | For orienting the thermal cracking graphite pipe device of thermal management |
| CN113864539A (en) * | 2021-09-14 | 2021-12-31 | 临海伟星新型建材有限公司 | Novel low-heat-conduction high-temperature-resistant plastic pipeline and preparation method thereof |
| CN114321511A (en) * | 2021-12-14 | 2022-04-12 | 临海伟星新型建材有限公司 | Capillary wound heat-preservation plastic pipeline and preparation method thereof |
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