CN115183087A - Thermal bridge-free fixing joint for heat distribution pipeline - Google Patents
Thermal bridge-free fixing joint for heat distribution pipeline Download PDFInfo
- Publication number
- CN115183087A CN115183087A CN202210991498.7A CN202210991498A CN115183087A CN 115183087 A CN115183087 A CN 115183087A CN 202210991498 A CN202210991498 A CN 202210991498A CN 115183087 A CN115183087 A CN 115183087A
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- Prior art keywords
- pipe
- heat
- outer sleeve
- hard
- working
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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
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/028—Composition or method of fixing a thermally insulating material
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- 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
Abstract
The invention provides a thermal pipeline fixing joint without a thermal bridge, which is provided with a working pipe for medium circulation, wherein at least one limiting inner sleeve short pipe is fixed on the outer diameter of the working pipe along the circumferential direction, and a steel outer sleeve pipe and a steel outer sleeve short pipe are respectively arranged on the peripheries of the working pipe and the inner sleeve short pipe; hard heat-insulating materials are filled between the working pipe and the outer sleeve steel pipe and between the inner sleeve short pipe and the outer sleeve short pipe, and the hard heat-insulating materials are hard microporous calcium silicate tiles and a hard polyurethane foam layer from inside to outside in sequence. According to the invention, the traditional conical pipe for transmitting axial thrust is replaced by the hollow supporting piece, and the inside and the outside of the supporting piece are respectively filled with the heat-insulating cotton and the hard heat-insulating material, so that on the premise of ensuring that enough thrust is borne, the heat bridge effect is eliminated, and further, the specified position of the steam pipe is ensured not to generate displacement; meanwhile, the failure of the anti-corrosion layer caused by overheating on the surface of the outer shell can be reduced, and the service life of the heating power pipe network is greatly prolonged.
Description
Technical Field
The invention relates to a thermal pipeline for transmitting high-temperature media, in particular to a thermal pipeline fixing joint without a thermal bridge.
Background
At present, the technology of prefabricated heat-preservation heat distribution pipelines is widely popularized in China, and for a direct-buried laying heat preservation pipe network system and an overhead heat preservation pipe network system, the external heat preservation of the pipelines is gradually improved in the process of extensive research and optimization, so that the heat loss of the whole heat supply pipe network system is effectively reduced.
FIG. 1 is a schematic view of a fixing joint of a steam direct-buried heat-insulating pipe in the prior art, wherein a conical pipe 1-1 for a working pipe 1 to pass through is arranged in an outer shell, the conical pipe 1-1 provides radial support for an inner steel pipe, and the outer edge of the conical pipe is connected with the outer shell through welding. The heat of the inner steel pipe can be conducted to the tail end of the conical pipe 1-1 to form a heat bridge effect, so that a large temperature difference exists between the surface of the outer sleeve close to the conical pipe 1-1 and a soil layer, the heat loss of the heat supply pipe network is increased rapidly, and in the past, an anticorrosive layer on the surface of the outer steel pipe close to the conical pipe 1-1 is damaged rapidly, so that the sealing inside a pipeline is influenced, and the heat supply pipe network is scrapped in advance.
Disclosure of Invention
The invention provides a thermal pipeline fixing joint without a thermal bridge, which is provided with a working pipe for medium circulation, wherein at least one limiting inner sleeve short pipe is fixed on the outer diameter of the working pipe along the circumferential direction, and a steel outer sleeve pipe and a steel outer sleeve short pipe are respectively arranged on the peripheries of the working pipe and the inner sleeve short pipe;
hard heat insulation materials are filled between the working pipe and the outer sleeve steel pipe and between the inner sleeve short pipe and the outer sleeve short pipe, and the hard heat insulation materials are hard microporous calcium silicate tiles and hard polyurethane foam layers from inside to outside in sequence.
Furthermore, the compressive strength of the hard microporous calcium silicate tile is 0.6-2.0 MPa, and the compressive strength of the hard polyurethane foam is 0.3-2.0 MPa.
Furthermore, the inner sleeve short pipe is a steel pipeline and is connected with the working pipe in a welding mode.
Furthermore, the outer sleeve short pipe is a steel pipeline and is connected with the outer sleeve steel pipe in a welding mode.
Furthermore, a plurality of limit inner sleeve short pipes arranged on the outer diameter of the working pipe are uniformly arranged in the circumferential direction of the working pipe or are uniformly arranged along the axis of the working pipe.
Furthermore, when the fixing section is used for directly burying and laying a heating power pipe network, the bottom of the outer sleeve short pipe is provided with a lower bottom plate, and the lower bottom plate is connected with the outer sleeve short pipe in a welding mode, so that the sealing and waterproof requirements are met.
Furthermore, a gap is reserved between the inner sleeve short pipe and the lower bottom plate, and auxiliary insulating layers are filled in the gap and the inner cavity of the inner sleeve short pipe.
Furthermore, the auxiliary heat-insulating layer is made of heat-insulating cotton.
By adopting the mechanism, the traditional conical pipe for transmitting axial thrust is replaced by the hollow supporting piece, and the inside and the outside of the supporting piece are respectively filled with the heat-insulating cotton and the hard heat-insulating material, so that the heat bridge effect is eliminated on the premise of ensuring the thrust, and the additional heat dissipation of a heating power pipe network is remarkably reduced while the positioning requirement of the steam pipe is met; meanwhile, the failure of the anti-corrosion layer caused by overheating on the surface of the outer shell can be reduced, and the service life of the heating power pipe network is greatly prolonged.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings may be obtained according to these drawings without inventive labor.
FIG. 1 is a cross-sectional view of a prior art direct-buried high-temperature steam pipeline susceptible to thermal bridge effects;
fig. 2 is a side sectional view of a heat-bridge-free fixing joint of a heat distribution pipeline provided by the invention;
fig. 3 isbase:Sub>A sectional view taken alongbase:Sub>A-base:Sub>A in fig. 2.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.
In the following description, for purposes of explanation, specific details are set forth, such as particular steps and particular structures, in order to provide a thorough understanding of the present invention. The following detailed description of the preferred embodiments of the invention, however, the invention is capable of other embodiments in addition to those detailed.
Referring to fig. 2-3, the invention provides a thermal pipeline fixing joint without a thermal bridge, the thermal pipeline fixing joint is provided with a working pipe 1 for medium circulation, at least one limiting inner sleeve short pipe 2 is fixed on the outer diameter of the working pipe 1 along the circumferential direction, and a steel outer sleeve pipe 5 and a steel outer sleeve short pipe 6 are respectively arranged on the peripheries of the working pipe 1 and the inner sleeve short pipe 2. Hard heat-insulating materials are filled between the working pipe 1 and the outer sleeve steel pipe 5 and between the inner sleeve short pipe 2 and the outer sleeve short pipe 6, and the hard heat-insulating materials are hard microporous calcium silicate tiles 3 and a hard polyurethane foam layer 4 from inside to outside in sequence.
The limiting inner sleeve short pipe 2 is of a hollow structure with the same material as the working pipe 1. In one embodiment, the limiting inner sleeve short pipe 2 is a steel pipe, the upper end of the steel pipe is provided with a concave cambered surface attached to the outer diameter of the working pipe 1, and the upper end surface of the steel pipe is welded and fixed with the working pipe 1.
When the invention is used for directly burying and laying a heat distribution pipe network, the bottom of the outer sleeve short pipe 6 is provided with the lower bottom plate 8, and the lower bottom plate 8 is connected with the outer sleeve short pipe 6 in a welding way, thereby meeting the sealing and waterproof requirements. As an option, a gap is reserved between the inner sleeve short pipe 2 and the lower bottom plate 8, an auxiliary heat-insulating layer 7 is filled in the gap and the inner cavity of the inner sleeve short pipe 2, and the auxiliary heat-insulating layer 7 can be made of soft heat-insulating cotton. The invention has good heat insulation performance by respectively filling the inside and the outside of the limit inner sleeve short pipe 2 with the hollow structure with the heat insulation cotton and the hard heat insulation material.
In an optional embodiment, the periphery of the limit inner sleeve short pipe 2 is coated with the hard heat-insulating material 3, the hard heat-insulating material 3 can bear the huge axial force of the working pipe 1, the polyurethane foam 4 and the first outer sleeve 5, so that in the invention, the compressive strength of the hard microporous calcium silicate tile 3 is 0.6-2.0 Mpa, and the compressive strength of the hard polyurethane foam 4 is 0.3-2.0 Mpa, so as to bear the acting force of the limit inner sleeve short pipe 2 and ensure the stability of the supporting structure.
In the invention, the limiting components consisting of the inner sleeve short pipe 2, the outer sleeve short pipe 6, the hard microporous calcium silicate tile 3 and the hard polyurethane foam layer 4 can be arranged in one group or several groups, and can be symmetrically arranged or uniformly arranged in the circumferential direction of the working pipe 1 or uniformly arranged along the axis of the working pipe 1.
The invention has the advantages that:
1) The hollow support piece is adopted, and the heat insulation cotton is filled in the hollow support piece and between the hollow support piece and the bottom plate, so that the heat conducted to the tail end of the support piece can be greatly reduced, and the problem that an outer surface anticorrosive coating falls off due to long-term high temperature of the shell is effectively avoided;
2) The hard heat-insulating material is arranged outside the supporting piece, so that the heat-insulating effect is achieved, and meanwhile, the supporting is provided for the pipeline above the supporting piece.
The above description is that of the preferred embodiment of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, in that devices and structures not described in detail are understood to be implemented in a manner common in the art; those skilled in the art can make many possible variations and modifications to the disclosed solution, or modify the equivalent embodiments with equivalent variations, without departing from the scope of the solution, without thereby affecting the spirit of the invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (8)
1. A thermal pipeline fixing joint without a thermal bridge is provided with a working pipe (1) for medium circulation, and is characterized in that at least one limiting inner sleeve short pipe (2) is fixed on the outer diameter of the working pipe (1) along the circumferential direction, and a steel outer sleeve pipe (5) and a steel outer sleeve short pipe (6) are respectively arranged on the peripheries of the working pipe (1) and the inner sleeve short pipe (2);
hard heat insulation materials are filled between the working pipe (1) and the outer sleeve steel pipe (5) and between the inner sleeve short pipe (2) and the outer sleeve short pipe (6), and the hard heat insulation materials are a hard microporous calcium silicate tile (3) and a hard polyurethane foam layer (4) from inside to outside in sequence.
2. The heat bridge-free heat distribution pipeline fixing joint as claimed in claim 1, wherein the compression strength of the hard microporous calcium silicate tile (3) is 0.6 Mpa-2.0 Mpa, and the compression strength of the hard polyurethane foam (4) is 0.3 Mpa-2.0 Mpa.
3. The heat-bridge-free thermodynamic pipe fixing joint as claimed in claim 1, wherein the inner sleeve pipe stub (2) is a steel pipe, and is welded to the working pipe (1).
4. A heat bridge free thermodynamic pipe joint as claimed in claim 1 wherein the outer sleeve pipe spool (6) is a steel pipe and is welded to the outer sleeve steel pipe (5).
5. The thermal-bridge-free fixing joint for thermal pipelines according to claim 1, wherein the plurality of limiting inner sleeve short pipes (2) arranged on the outer diameter of the working pipe (1) are uniformly arranged in the circumferential direction of the working pipe (1) or along the axis of the working pipe (1).
6. The thermal-bridge-free fixing joint for thermal pipelines according to claim 1, wherein when the fixing joint is used for direct-buried laying of thermal pipe networks, the bottom of the outer sleeve short pipe (6) is provided with a lower bottom plate (8), and the lower bottom plate (8) is welded with the outer sleeve short pipe (6).
7. A heat bridge free fixing joint for thermodynamic pipes as claimed in claim 6, wherein a gap is left between the inner sleeve pipe stub (2) and the lower bottom plate (8), and the gap and the inner cavity of the inner sleeve pipe stub (2) are filled with auxiliary insulating layer (7).
8. The heat bridge-free heat distribution pipeline fixing joint as claimed in claim 7, wherein the auxiliary insulation layer (7) is made of insulation cotton.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210991498.7A CN115183087A (en) | 2022-08-18 | 2022-08-18 | Thermal bridge-free fixing joint for heat distribution pipeline |
| PCT/CN2023/108614 WO2024037279A1 (en) | 2022-08-18 | 2023-07-21 | Thermal pipe fixation joint without thermal bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210991498.7A CN115183087A (en) | 2022-08-18 | 2022-08-18 | Thermal bridge-free fixing joint for heat distribution pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115183087A true CN115183087A (en) | 2022-10-14 |
Family
ID=83523766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210991498.7A Pending CN115183087A (en) | 2022-08-18 | 2022-08-18 | Thermal bridge-free fixing joint for heat distribution pipeline |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115183087A (en) |
| WO (1) | WO2024037279A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024037279A1 (en) * | 2022-08-18 | 2024-02-22 | 上海科华热力管道有限公司 | Thermal pipe fixation joint without thermal bridge |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1383978A (en) * | 1971-10-28 | 1974-02-12 | Logstor Rorind | Insualted pipeline assemblies |
| CN204942919U (en) * | 2015-09-15 | 2016-01-06 | 上海科华热力管道有限公司 | The thermal compensation short tube of a kind of watt/bubble composite heat-insulating layer |
| CN110594533B (en) * | 2019-09-28 | 2023-12-29 | 上海科华热力管道有限公司 | Steam pipe network fixing joint and manufacturing process thereof |
| CN213809333U (en) * | 2020-11-02 | 2021-07-27 | 山东省环能设计院股份有限公司 | Non-heat-bridge direct-buried steel sleeve steel steam pipeline fixing support |
| CN216408186U (en) * | 2021-08-03 | 2022-04-29 | 南京苏夏设计集团股份有限公司 | Prefabricated polyurethane heat-preservation fixed heat-insulation pipe bracket |
| CN218523235U (en) * | 2022-08-18 | 2023-02-24 | 上海科华热力管道有限公司 | Thermal bridge-free fixing joint for heat distribution pipeline |
| CN115183087A (en) * | 2022-08-18 | 2022-10-14 | 上海科华热力管道有限公司 | Thermal bridge-free fixing joint for heat distribution pipeline |
-
2022
- 2022-08-18 CN CN202210991498.7A patent/CN115183087A/en active Pending
-
2023
- 2023-07-21 WO PCT/CN2023/108614 patent/WO2024037279A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024037279A1 (en) * | 2022-08-18 | 2024-02-22 | 上海科华热力管道有限公司 | Thermal pipe fixation joint without thermal bridge |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024037279A1 (en) | 2024-02-22 |
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