CN113864539B - Novel low-heat-conduction high-temperature-resistant plastic pipeline and preparation method thereof - Google Patents
Novel low-heat-conduction high-temperature-resistant plastic pipeline and preparation method thereof Download PDFInfo
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- CN113864539B CN113864539B CN202111072795.3A CN202111072795A CN113864539B CN 113864539 B CN113864539 B CN 113864539B CN 202111072795 A CN202111072795 A CN 202111072795A CN 113864539 B CN113864539 B CN 113864539B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000011521 glass Substances 0.000 claims abstract description 53
- 238000004804 winding Methods 0.000 claims abstract description 40
- 239000011324 bead Substances 0.000 claims abstract description 39
- 239000004831 Hot glue Substances 0.000 claims abstract description 7
- 238000004321 preservation Methods 0.000 claims abstract description 7
- 239000002390 adhesive tape Substances 0.000 claims abstract description 6
- 239000002131 composite material Substances 0.000 claims abstract description 5
- 238000009413 insulation Methods 0.000 claims abstract description 5
- 239000004005 microsphere Substances 0.000 claims description 22
- 239000011248 coating agent Substances 0.000 claims description 15
- 238000000576 coating method Methods 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 7
- 238000004513 sizing Methods 0.000 claims description 7
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 238000005253 cladding Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
Classifications
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
-
- 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
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/04—Protection of pipes or objects of similar shape against external or internal damage or wear against fire or other external sources of extreme heat
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Thermal Insulation (AREA)
Abstract
The invention discloses a novel low-heat-conductivity high-temperature-resistant plastic pipeline, which comprises three composite pipeline layers, wherein an inner layer is PE with good heat resistance, an intermediate layer is a hollow glass bead tape winding layer, an outer layer is a recoated PE layer, a layer of dense hollow glass beads is attached to an adhesive tape of the hollow glass bead tape of the intermediate layer, the hollow glass beads play a role in heat preservation and heat insulation, after the hollow glass bead tape is heated, a hot melt adhesive is melted, so that the hollow glass beads can be adhered to PE pipes, and after the glass bead tape is wound for a certain number of layers, the PE layer is recoated. The invention also discloses a preparation method of the pipeline. By the technical scheme, the problems in the field of the prior middle-deep geothermal pipeline are solved, the heat resistance and the heat insulation performance are high, the problem of low strength under the condition of long-time high temperature can be solved, the outlet temperature can be increased, and the heat exchange efficiency is improved.
Description
Technical Field
The invention belongs to the field of middle-deep geothermal pipelines and the field of oilfield pipelines, and particularly relates to a novel low-heat-conduction high-temperature-resistant plastic pipeline and a preparation method thereof.
Background
At present, in the field of middle-deep geothermal heat, more than 3000 meters of underground hot water is needed to be extracted, then heat exchange is carried out, and the outlet temperature determines the heat exchange efficiency, so that the outlet temperature of a water outlet pipe needs to be improved as much as possible, and the pipe needs to have very high heat resistance, not to be softened at high temperature and poor performance, and also needs to have very good heat preservation performance and reduce heat loss in the conveying process. At present, the pipe which can be used for middle-deep geothermal heat comprises a PE pipe and a PP pipe, both of which have high heat resistance, but the low-temperature brittleness of the PP pipe is high, the PE pipe is easy to brittle fracture in winter construction, and the PE pipe is high-temperature resistant and still has certain flexibility at low temperature, but the PE pipe has poor heat preservation performance and low outlet temperature, so that the PE pipe is insufficient to meet the requirements.
Disclosure of Invention
Aiming at the defects of the middle-deep geothermal pipeline, the invention aims to provide a novel low-heat-conduction high-temperature-resistant plastic pipe and a preparation method thereof, which can realize high heat resistance and high heat preservation performance, can solve the problem of low strength under the condition of long-time high temperature, can increase the outlet temperature of water, and can improve the heat conversion efficiency.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a novel low heat conduction high temperature resistant plastic pipe way, contains three-layer composite pipe layer, and the inlayer is PE that heat resistance is good, and the intermediate level is hollow glass bead area winding layer, and the skin is the one deck PE of recoating, the hollow glass bead area of intermediate level has attached the intensive hollow glass bead of one deck on the sticky tape, hollow glass bead plays thermal-insulated effect of heat preservation, and hollow glass bead area is heated the back, and hot melt adhesive melts, makes hollow glass bead can bond on PE tubular product, waits that the glass bead area twines certain number of piles after, and the skin coats one deck PE again.
Preferably, the adhesive tape comprises PE-g-MAH.
Preferably, the raw PE is PERT type I or type II with high temperature resistance.
Preferably, the plastic pipe has a specification of dn110 SDR11 or dn160 SDR9.
Preferably, the particle size of the hollow glass beads is 10-50 mu m, and the true density is 0.20-0.76 g/cm; the bandwidth of the hollow glass microsphere is 4-7cm, and the thickness is 1-2mm.
The invention also discloses a preparation method of the novel low-heat-conduction high-temperature-resistant plastic pipeline, which comprises the following steps:
s1: melting and extruding raw material PE through an extruder, vacuum sizing, and cooling to obtain an inner layer pipe;
s2: the cooled inner layer pipe passes through winding equipment, and the hollow glass microsphere tape is wound for a certain number of layers according to a certain angle and a certain tension;
s3: heating the wound and fixed pipe through an oven, and then coating a layer of PERT;
s4: and cooling, traction cutting and offline of the coated pipe.
Further, the processing equipment used in the preparation method comprises: extrusion equipment, winding equipment and cladding equipment.
Further, the winding equipment comprises four winding units and a heating device, wherein the heating temperature is 150-180 ℃, the heating device is used for melting the hot melt adhesive of the hollow glass microsphere belt, the glass microsphere is fixed on the pipe, the winding angle is 42-80 degrees, the winding tension is 5-15N, and the number of winding layers is 2-4.
Further, the coating equipment comprises a coating machine and an oven, wherein the coating machine is used for coating the PE layer of the outer layer, and the temperature of the oven is 100-350 ℃.
Advantageous effects
By the technical scheme, the problems in the field of the prior middle-deep geothermal pipeline are solved, the heat resistance and the heat insulation performance are high, the problem of low strength under the condition of long-time high temperature can be solved, the outlet temperature can be increased, and the heat exchange efficiency is improved. The technical scheme of the invention has simple preparation process and is suitable for large-scale popularization.
Drawings
FIG. 1 is a schematic diagram of a novel low thermal conductivity high temperature resistant plastic tubing of the present invention;
FIG. 2 is a flow chart of a process for preparing the novel low-heat-conductivity high-temperature-resistant plastic pipe;
in the figure: 1. an outer layer PERT; 2. a hollow glass microsphere tape winding layer; 3. inner layer PERT.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in FIG. 1, a novel low heat conduction high temperature resistant plastic pipeline comprises three composite pipeline layers, wherein the inner layer is PE with good heat resistance, the middle layer is a hollow glass bead tape winding layer, the outer layer is a recoated layer of PE, the hollow glass bead tape of the middle layer has the components of PE-g-MAH, a layer of dense hollow glass beads is attached to the adhesive tape, the hollow glass beads play a role in heat preservation and heat insulation, after the hollow glass bead tape is heated, the hot melt adhesive melts, so that the hollow glass beads can be adhered to PE pipes, and after the glass bead tape is wound by a certain number of layers, the outer layer is recoated with a layer of PE.
In the invention, the raw material PE can be selected from high-temperature resistant PERT type I or type II; the specification of the composite pipe is dn110 SDR11 or dn160 SDR9; the particle size of the hollow glass beads is 10-50 mu m, and the true density is 0.20-0.76 g/cm; the bandwidth of the hollow glass beads is 4-7cm, and the thickness of the hollow glass beads is 1-2mm.
Above-mentioned preparation of novel low heat conduction high temperature resistant plastic pipeline, main preparation equipment includes: extrusion equipment, winding equipment and cladding equipment, the preparation technology is as shown in figure 2, and mainly comprises the following steps:
s1: melting and extruding raw material PE through an extruder, vacuum sizing, and cooling to obtain an inner layer pipe;
s2: the cooled inner layer pipe passes through winding equipment, and the hollow glass microsphere tape is wound for a certain number of layers according to a certain angle and a certain tension;
s3: heating the wound and fixed pipe through an oven, and then coating a layer of PERT;
s4: and cooling, traction cutting and offline of the coated pipe.
Wherein: the winding equipment comprises four winding units and a heating device, wherein the heating temperature is 150-180 ℃, the winding device is used for melting the hot melt adhesive of the hollow glass bead belt, so that the glass beads are fixed on the pipe, the winding angle is 42-80 degrees, and the winding tension is 5-15N; the coating equipment comprises a coating machine and an oven, wherein the coating machine is used for coating the PE layer of the outer layer, and the temperature of the oven is 100-350 ℃.
The specific preparation examples are as follows:
example 1
Extruding a PERT pipe by adopting a single screw extruder, wherein the temperature of a cylinder area is 180-200 ℃, the temperature of a die head area is 190-200 ℃, the vacuum sizing is carried out, the vacuum degree is 0.1MPa, after cooling, the hollow glass microsphere is subjected to winding equipment, the thickness of the hollow glass microsphere is 1mm, the width of the hollow glass microsphere is 4mm, the number of winding layers is 4, the winding angle is 42 degrees, the winding tension is set to be 5N, the particle size of the hollow plastic microsphere is 10 mu m, and the hollow plastic microsphere is heated by an oven before being coated, then coated with a layer of PERT, cooled, cut and put off the line.
Example 2
Extruding a PERT pipe by adopting a single screw extruder, wherein the temperature of a cylinder area is 180-200 ℃, the temperature of a die head area is 190-200 ℃, the vacuum sizing is carried out, the vacuum degree is 0.1MPa, cooling is carried out, the hollow glass microsphere is selected to have a thickness of 2mm and a specification of 7mm, the number of winding layers is 3, the winding angle is 60 degrees, the winding tension is set to be 8N, the particle size of the hollow plastic microsphere is 30 mu m, and the hollow plastic microsphere is heated by an oven before being coated, then coated with a layer of PERT, cooled, cut and offline.
Example 3
Extruding a PERT pipe by adopting a single screw extruder, wherein the temperature of a cylinder area is 180-200 ℃, the temperature of a die head area is 190-200 ℃, the vacuum sizing is carried out, the vacuum degree is 0.1MPa, cooling is carried out, the hollow glass microsphere is selected by using a specification of 2mm in thickness and 6mm in width by adopting winding equipment, the number of winding layers is 2, the winding angle is 50 degrees, the winding tension is set to 15N, the particle size of the hollow Baoli microsphere is 35 mu m, and the hollow Baoli microsphere is heated by an oven before being coated, then coated with a layer of PERT, cooled, cut and put off line.
Example 4
Extruding a PERT pipe by adopting a single screw extruder, wherein the temperature of a cylinder area is 180-200 ℃, the temperature of a die head area is 190-200 ℃, the vacuum sizing is carried out, the vacuum degree is 0.1MPa, cooling is carried out, the hollow glass microsphere is selected to have a thickness of 2mm and a specification of 7mm, the number of winding layers is 3, the winding angle is 70 degrees, the winding tension is set to be 15N, the particle size of the hollow plastic microsphere is 50 mu m, and the hollow plastic microsphere is heated by an oven before being coated, then coated with a layer of PERT, cooled, cut and offline.
The results of the performance tests are shown in the following table:
according to the embodiment, the outlet temperature of the water in the pipeline can reach 50-70 ℃ through the technical scheme, so that the heat exchange efficiency is improved.
Claims (5)
1. The novel low-heat-conductivity high-temperature-resistant plastic pipeline is characterized by comprising three composite pipeline layers, wherein an inner layer is PE with good heat resistance, an intermediate layer is a hollow glass bead tape winding layer, an outer layer is a layer of PE coated again, a layer of dense hollow glass beads is attached to an adhesive tape of the intermediate layer hollow glass bead tape, the hollow glass beads play a role in heat preservation and heat insulation, after the hollow glass bead tape is heated, a hot melt adhesive is melted, so that the hollow glass beads can be adhered to PE pipes, and after the glass bead tape is wound for a certain number of layers, a layer of PE is coated outside the intermediate layer;
the particle size of the hollow glass beads is 10-50 mu m, and the true density is 0.20-0.76 g/cm; the bandwidth of the hollow glass microsphere is 4-7cm, and the thickness is 1-2mm; the adhesive tape comprises PE-g-MAH; the raw material PE is a high-temperature-resistant PERT type I or type II;
the specification of the plastic pipeline is dn110 SDR11 or dn160 SDR9.
2. A method for preparing a novel low-heat-conduction high-temperature-resistant plastic pipeline suitable for the field of mid-deep geothermal energy according to claim 1, which is characterized by comprising the following steps:
s1: melting and extruding raw material PE through an extruder, vacuum sizing, and cooling to obtain an inner layer pipe;
s2: the cooled inner layer pipe passes through winding equipment, and the hollow glass microsphere tape is wound for a certain number of layers according to a certain angle and a certain tension; the hollow glass bead belt is made by adhering a layer of dense hollow glass beads on an adhesive tape;
s3: heating the wound and fixed pipe through an oven, and then coating a layer of PERT;
s4: and cooling, traction cutting and offline of the coated pipe.
3. The preparation method of the novel low-heat-conduction high-temperature-resistant plastic pipeline suitable for the field of medium-deep geothermal energy as claimed in claim 2, wherein the processing equipment used in the preparation method comprises the following steps: extrusion equipment, winding equipment and cladding equipment.
4. The method for preparing the novel low-heat-conductivity high-temperature-resistant plastic pipeline suitable for the field of medium-deep geothermal energy according to claim 3, wherein the winding equipment comprises four winding units and a heating device, the heating temperature is 150-180 ℃, the heating device is used for melting the hot melt adhesive of the hollow glass bead strips, the glass beads are fixed on the pipe, the winding angle is 42-80 degrees, the winding tension is 5-15N, and the number of winding layers is 2-4.
5. The method for preparing the novel low-heat-conduction high-temperature-resistant plastic pipeline suitable for the field of medium-deep geothermal energy according to claim 4, wherein the coating equipment comprises a coating machine and an oven, the coating machine is used for coating the PE layer of the outer layer, and the temperature of the oven is 100-350 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111072795.3A CN113864539B (en) | 2021-09-14 | 2021-09-14 | Novel low-heat-conduction high-temperature-resistant plastic pipeline and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111072795.3A CN113864539B (en) | 2021-09-14 | 2021-09-14 | Novel low-heat-conduction high-temperature-resistant plastic pipeline and preparation method thereof |
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| Publication Number | Publication Date |
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| CN113864539A CN113864539A (en) | 2021-12-31 |
| CN113864539B true CN113864539B (en) | 2024-01-09 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN115071188A (en) * | 2022-05-12 | 2022-09-20 | 临海伟星新型建材有限公司 | Deep geothermal heat-insulation composite pipeline and preparation method thereof |
| CN114962861A (en) * | 2022-05-12 | 2022-08-30 | 临海伟星新型建材有限公司 | Deep geothermal water conveying pipeline and preparation method thereof |
| CN116589770A (en) * | 2023-04-27 | 2023-08-15 | 临海伟星新型建材有限公司 | PE hollow mute pipeline and preparation method thereof |
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| CN113864539A (en) | 2021-12-31 |
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