CN112648446A - Glass fiber reinforced plastic polyurethane direct-buried heat-insulating pipe - Google Patents
Glass fiber reinforced plastic polyurethane direct-buried heat-insulating pipe Download PDFInfo
- Publication number
- CN112648446A CN112648446A CN202011469706.4A CN202011469706A CN112648446A CN 112648446 A CN112648446 A CN 112648446A CN 202011469706 A CN202011469706 A CN 202011469706A CN 112648446 A CN112648446 A CN 112648446A
- Authority
- CN
- China
- Prior art keywords
- polyurethane
- reinforced plastic
- glass fiber
- fiber reinforced
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 36
- 239000004814 polyurethane Substances 0.000 title claims abstract description 36
- 239000011152 fibreglass Substances 0.000 title claims abstract description 31
- 230000001681 protective effect Effects 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000005260 corrosion Methods 0.000 claims abstract description 8
- 239000011248 coating agent Substances 0.000 claims abstract description 6
- 238000000576 coating method Methods 0.000 claims abstract description 6
- 230000002093 peripheral effect Effects 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 239000011521 glass Substances 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 10
- 229920001903 high density polyethylene Polymers 0.000 claims description 8
- 239000004700 high-density polyethylene Substances 0.000 claims description 8
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 6
- 239000011496 polyurethane foam Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004321 preservation Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 6
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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
-
- 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
- F16L57/02—Protection of pipes or objects of similar shape against external or internal damage or wear against cracking or buckling
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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
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Thermal Insulation (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention relates to a glass fiber reinforced plastic polyurethane direct-buried heat-insulating pipe which comprises a glass fiber reinforced plastic pipe body, wherein one end of the glass fiber reinforced plastic pipe body is provided with a plug connector, the other end of the glass fiber reinforced plastic pipe body is provided with a plug port capable of being matched with the plug connector, the inner surface of the glass fiber reinforced plastic pipe body is coated with a high-temperature-resistant anti-corrosion material coating, and the outer peripheral wall of the glass fiber reinforced plastic pipe body is sequentially coated with a polyurethane heat-insulating layer and a waterproof protective shell; and an anti-leakage alarm line is arranged in the polyurethane heat-insulating layer. The glass fiber reinforced plastic polyurethane direct-buried heat-insulating pipe has the advantages of good heat-insulating effect, low heat loss, difficulty in breaking or deforming and capability of accurately detecting the water leakage position.
Description
Technical Field
The invention relates to the technical field of pipeline production, in particular to a glass fiber reinforced plastic polyurethane direct-buried heat-insulating pipe.
Background
At present, common steel pipes or composite pipes are adopted as base pipes for conveying some fluid substances remotely, and then heat-insulating protective materials are wound on the outer walls of the base pipes, so that the integrity of the heat-insulating protective materials and the integrity of the base pipes are poor, and the two are easy to loosen to generate gaps during installation. Meanwhile, the delivery pipe is easy to break or deform due to external pressure and the like. In addition, the heat loss of the heat-insulating steel pipe is high and is usually 5-10%; when the leakage is found, the leakage position cannot be accurately known, and the maintenance cost is high.
How to design a conveying heat-insulating pipe which has good heat-insulating effect, low heat loss, difficult fracture or deformation and accurate detection of water leakage position becomes a technical problem which needs to be solved urgently in the field.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provide the glass fiber reinforced plastic polyurethane direct-buried heat-insulating pipe which has good heat-insulating effect, low heat loss and difficult breakage or deformation and can accurately detect the water leakage position.
The technical scheme adopted by the invention is as follows: a glass fiber reinforced plastic polyurethane direct-buried heat-insulating pipe comprises a glass fiber reinforced plastic pipe body, wherein one end of the glass fiber reinforced plastic pipe body is provided with a plug connector, the other end of the glass fiber reinforced plastic pipe body is provided with a plug port which can be matched with the plug connector, the inner surface of the glass fiber reinforced plastic pipe body is coated with a high-temperature-resistant anti-corrosion material coating, and the outer peripheral wall of the glass fiber reinforced plastic pipe body is sequentially coated with a polyurethane heat-insulating layer and a waterproof protective shell layer from; and an anti-leakage alarm line is arranged in the polyurethane heat-insulating layer.
Preferably, the waterproof protective shell layer is a high-density polyethylene protective shell layer or a glass fiber reinforced plastic protective shell layer.
Preferably, the polyurethane heat-insulating layer comprises a first woven layer, a polyurethane foam layer and a second woven layer which are sequentially arranged.
Preferably, the end surfaces of the polyurethane heat-insulating layer and the waterproof protective shell layer are provided with high-density polyethylene protective shell layers.
Preferably, the socket is provided with a guide part, and the guide part is an inner chamfer arranged at the end part of the socket.
Preferably, the outer end part of the plug connector is provided with an outer chamfer which is convenient to insert into the plug opening.
Preferably, the glass steel tube body, the plug connector and the plug interface are integrally formed.
Compared with the prior art, the invention has the following advantages:
1. the invention relates to a glass fiber reinforced plastic polyurethane direct-buried heat-insulating pipe, wherein the peripheral wall of a glass fiber reinforced plastic pipe body is provided with polyurethaneThe heat conductivity coefficient of the polyurethane heat-insulating layer is as follows: lambda is 0.013-0.03kcal/m2H DEG C, the heat preservation effect is improved by 4-9 times compared with that of other common heat preservation materials. In addition, the inner surface of the glass steel tube body is coated with a high-temperature-resistant anti-corrosion material coating, so that the overall heat loss of the heat supply pipeline is further reduced, and the heat loss of a heat supply network of the tube body is 2% and is far less than the international standard requirement of 10%.
2. The glass fiber reinforced plastic polyurethane direct-buried heat preservation pipe is provided with the leakage alarm line, so that once leakage occurs at a certain position of the pipe, the accurate position of water leakage and the size of the leakage degree of the heat preservation pipe can be displayed on a special detection instrument through the conduction of the alarm line, a leakage detection person can be informed to rapidly process the leaked pipe section, and the safe operation of a heat supply pipe network is ensured.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an internal cross-sectional view of the present invention.
Fig. 3 is an enlarged schematic view of a portion a of fig. 2.
FIG. 4 is an assembly diagram of two sections of GRP polyurethane direct-buried thermal insulation pipes.
The numbers in the figures indicate:
the anti-corrosion plastic pipe comprises a glass steel pipe body 1, a plug 11, an outer chamfer 111, a plug port 12, a guide part 121, a high-temperature-resistant anti-corrosion material coating 2, a polyurethane heat-insulating layer 3, a first woven layer 31, a polyurethane foam layer 32, a second woven layer 33, a waterproof protective shell layer 4 and an anti-leakage alarm line 5.
The specific implementation mode is as follows:
for the purpose of enhancing the understanding of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and embodiment examples. The invention can be implemented by:
referring to fig. 1-4, a glass fiber reinforced plastic polyurethane direct-buried insulating pipe comprises a glass fiber reinforced plastic pipe body 1, wherein one end of the glass fiber reinforced plastic pipe body 1 is provided with a plug 11, the other end of the glass fiber reinforced plastic pipe body is provided with a plug 12 which can be matched with the plug 11, and the glass fiber reinforced plastic pipe body 1, the plug 11 and the plug 12 are integrally formed. The inner surface of the glass steel tube body 1 is coated with high temperature resistant coatingThe outer peripheral wall of the glass steel tube body 1 is sequentially coated with a polyurethane heat-insulating layer 3 and a waterproof protective shell layer 4 from inside to outside; the polyurethane heat-insulating layer 3 comprises a first woven layer, a polyurethane foam layer and a second woven layer which are sequentially arranged. The end surfaces of the polyurethane heat-insulating layer 3 and the waterproof protective shell layer 4 are provided with high-density polyethylene protective shell layers. The heat conductivity coefficient of the polyurethane heat-insulating layer 3 is as follows: lambda is 0.013-0.03kcal/m2h.DEG C, the heat preservation effect is improved by 4-9 times compared with that of other common heat preservation materials. Furthermore, the water absorption is very low, about 0.2kg/m2. The reason why the water absorption rate is low is that the closed cell ratio of the polyurethane foam is as high as about 92%. The heat-insulating layer, the waterproof protective shell 4 with good outer waterproof performance and the inner surface of the glass steel tube body 1 are coated with the high-temperature-resistant anti-corrosion material coating 2, so that the situation that a traditional trench is laid with a 'wet wadded jacket' heat-supply pipeline is changed, the overall heat loss of the heat-supply pipeline is greatly reduced, and the heat loss of a heat network is 2% and is less than the international standard requirement of 10%.
The waterproof protective shell layer 4 is a high-density polyethylene protective shell layer or a glass fiber reinforced plastic protective shell layer. The high-density polyethylene protective shell layer and the glass fiber reinforced plastic protective shell layer have good waterproof performance and compressive property, so that the heat-insulating pipe is not easy to break or deform. The high-density polyethylene protective shell layer or the glass fiber reinforced plastic protective shell layer has good corrosion resistance, insulation and mechanical properties. Therefore, the insulating pipe is hardly corroded by the outside air and water. As long as the water quality in the pipeline is well treated, the service life can reach more than 50 years, and is 3-4 times longer than that of the traditional trench laying and overhead laying.
The socket 12 is provided with a guide portion 121, and the guide portion 121 is an inner chamfer arranged at an end portion of the socket 12. The outer end of the plug 11 is provided with an outer chamfer 111 which is convenient to insert into the socket 12. The design can facilitate the connection of two sections of glass fiber reinforced plastic polyurethane direct-buried heat-insulating pipes.
And an anti-leakage alarm line 5 is arranged in the polyurethane heat-insulating layer. The leakage-preventing warning thread 5 penetrates the entire polyurethane foam layer 32. The anti-leakage alarm line 5 can be connected with a special detection instrument. Once leakage occurs at a certain position of the pipeline, the accurate position of water leakage and the leakage degree of the heat preservation pipeline can be displayed on a special detection instrument through the conduction of an alarm line, so that leakage detection personnel can be informed to rapidly process the leaking pipe section, and the safe operation of a heat supply pipe network is ensured.
Finally, it should be noted that: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (7)
1. The utility model provides a glass steel polyurethane direct-burried insulating tube, includes glass steel pipe body (1), and glass steel pipe body (1) one end is provided with bayonet joint (11), and the other end is provided with can with bayonet joint (11) complex interface (12), its characterized in that: the inner surface of the glass steel tube body (1) is coated with a high-temperature-resistant anti-corrosion material coating (2), and the outer peripheral wall of the glass steel tube body (1) is sequentially coated with a polyurethane heat-insulating layer (3) and a waterproof protective shell layer (4) from inside to outside; and an anti-leakage alarm line (5) is arranged in the polyurethane heat-insulating layer (3).
2. The GRP (glass reinforced plastic polyurethane) direct-buried thermal insulation pipe as claimed in claim 1, wherein the waterproof protective shell layer (4) is a high density polyethylene protective shell layer or a GRP protective shell layer.
3. The FRP-polyurethane direct-buried thermal insulation pipe as claimed in claim 1, wherein the polyurethane thermal insulation layer (3) comprises a first woven layer (31), a polyurethane foam layer (32) and a second woven layer (33) which are arranged in sequence.
4. The FRP polyurethane direct-buried thermal insulation pipe as claimed in claim 1, wherein the end surfaces of the polyurethane thermal insulation layer (3) and the waterproof protective shell layer (4) are provided with high-density polyethylene protective shell layers.
5. The FRP-polyurethane direct-burried thermal insulation pipe as claimed in any one of claims 1 to 4, characterized in that the socket (12) is provided with a guide (121), the guide (121) being an internal chamfer arranged at the end of the socket (12).
6. The FRP polyurethane direct-buried thermal insulation pipe as claimed in claim 5, wherein the outer end of the plug connector (11) is provided with an external chamfer (111) which is convenient to insert into the plug interface (12).
7. The FRP polyurethane direct-buried thermal insulation pipe as claimed in claim 5, wherein the FRP pipe body (1), the plug connector (11) and the plug interface (12) are integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011469706.4A CN112648446A (en) | 2020-12-15 | 2020-12-15 | Glass fiber reinforced plastic polyurethane direct-buried heat-insulating pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011469706.4A CN112648446A (en) | 2020-12-15 | 2020-12-15 | Glass fiber reinforced plastic polyurethane direct-buried heat-insulating pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112648446A true CN112648446A (en) | 2021-04-13 |
Family
ID=75353918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011469706.4A Pending CN112648446A (en) | 2020-12-15 | 2020-12-15 | Glass fiber reinforced plastic polyurethane direct-buried heat-insulating pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112648446A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114001205A (en) * | 2021-10-22 | 2022-02-01 | 河北乾海管道制造有限公司 | Prefabricated direct-burried insulating tube with alarming function |
-
2020
- 2020-12-15 CN CN202011469706.4A patent/CN112648446A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114001205A (en) * | 2021-10-22 | 2022-02-01 | 河北乾海管道制造有限公司 | Prefabricated direct-burried insulating tube with alarming function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210413 |
|
| WD01 | Invention patent application deemed withdrawn after publication |