CN102654232A - Thermal expansion-proof vacuum thermal-insulation pipe - Google Patents
Thermal expansion-proof vacuum thermal-insulation pipe Download PDFInfo
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- CN102654232A CN102654232A CN2011100495034A CN201110049503A CN102654232A CN 102654232 A CN102654232 A CN 102654232A CN 2011100495034 A CN2011100495034 A CN 2011100495034A CN 201110049503 A CN201110049503 A CN 201110049503A CN 102654232 A CN102654232 A CN 102654232A
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Abstract
The invention provides a thermal expansion-proof vacuum thermal-insulation pipe, which comprises a pipeline, a first thermal-insulation layer, a first sealing layer, a second thermal-insulation layer, a second sealing layer, thermal-insulation end covers and a metal capsid layer, wherein the pipeline is a steel pipe and is used for storing heat-conduction material; the first thermal-insulation layer covers the steel pipe; the first sealing layer covers the first thermal-insulation layer; the second thermal-insulation layer covers the first sealing layer; the second sealing cover covers the second thermal-insulation layer; the thermal-insulation end covers are positioned on two sides of the second thermal-insulation layer and are connected with the first sealing layer and the second sealing layer; and the metal capsid layer covers the second sealing layer. Because double thermal-insulation layers are used in the thermal expansion-proof vacuum thermal-insulation pipe, influence on thermal insulation by steel pipe thermal expansion is lowered, and the thermal-insulation effect of the thermal-insulation pipe is improved.
Description
Technical field
The invention belongs to the solar facilities field, and relate in particular to a kind of heat expansion-proof vacuum heat-preserving tube.
Background technique
For some heat energy applications, like the solar energy heat utilization, need being delivered to other makes land used with producing from heating power with the heat transport medium (like water or conduction oil) of high temperature.In this course of conveying; For preventing thermal loss; Industry is usually at transfer canal outerwrap multilayer insulant, as wrap up the protective coating of heatproof anticorrosive coat, heat-resisting thermal insulation layer, polyurethane foam insulation layer and outermost successively in the pipeline outside, to reduce the heat exchange of pipeline internal medium and external environment; For example common vacuum insulation comprises: pipeline is used to deposit Heat Conduction Material; Thermal insulation layer coats said steel pipe; Sealing layer coats said thermal insulation layer.The deficiency of this kind structure is complicate fabrication process on the one hand, is unfavorable for reducing manufacture cost; Be that steel pipe has the principle of expanding with heat and contract with cold on the other hand, when the liquid in pipe temperature was very high, the expansion of steel pipe was also relatively more severe, thereby might cause the fracture of thermal insulation layer and sealing layer, influenced heat insulation effect.
To this problem, industry is also developed insulation system, specifically can be with reference to shown in the Chinese patent 02263826.1; But this kind structure all need be installed air check valve on outer tube; With the space vacuum pumping between interior pipe and the outer tube, the deficiency of this kind mode is that outer tube is difficult for being inserted in after the peripheral coating of interior pipe thermoinsulation material through vacuum pumping device; Be difficult for thereby cause installing, be unfavorable for reducing manufacture cost; In addition, this mode that vacuumizes is on outer tube, to offer a hole, vacuumizes through this hole with evacuator, and this method not only needs bigger power, and the effect that vacuumizes is also undesirable.Therefore the fabricating cost of this device is high, and effect is also not fully up to expectations.
Summary of the invention
The object of the invention is to provide a kind of heat expansion-proof vacuum heat-preserving tube, in order to overcome the problem that the thermal expansion of vacuum insulation insulating steel tube causes heat insulation effect to reduce in the existing technology.
To achieve these goals, the present invention proposes a kind of heat expansion-proof vacuum heat-preserving tube, comprising: pipeline, and said pipeline is a steel pipe, is used to deposit Heat Conduction Material; First thermal insulation layer coats said steel pipe; First sealing layer coats said first thermal insulation layer; Second thermal insulation layer coats said first sealing layer; Second sealing layer coats said second thermal insulation layer; Be incubated end cap, be positioned at the both sides of said second thermal insulation layer, and all be connected with said first sealing layer, second sealing layer; Metal protective case layer coats said second sealing layer.
Optional, said steel pipe is a large-diameter steel pipe, the interior bore scope of said steel pipe is: 100mm to 400mm.
Optional, the material of said first thermal insulation layer is a flexibly thermal insulation material.
Optional, the material of said first thermal insulation layer is ultra-fine fibre glass or alumina silicate.
Optional, the material of said second thermal insulation layer is a flexibly thermal insulation material.
Optional, the material of said second thermal insulation layer is ultra-fine fibre glass or alumina silicate.
Optional, the material of said first sealing layer is the plastic-aluminum obstructing film.
Optional, the material of said second sealing layer is the plastic-aluminum obstructing film.
Optional, said vacuum heat-preserving tube also comprises a plurality of vacuum pumping mouthes, said vacuum pumping mouth all is arranged on the said insulation end cap.
Optional, said vacuum heat-preserving tube also comprises a plurality of air pipes, a said air pipe is connected with a said vacuum pumping mouth.
Compared with prior art; The beneficial effect of heat expansion-proof vacuum heat-preserving tube of the present invention is: heat expansion-proof vacuum heat-preserving tube of the present invention adopts two-layer thermal insulation layer and two-layer sealing layer; Thereby guaranteed under the situation of steel pipe expanded by heating; Be positioned at outermost second thermal insulation layer and second sealing layer and remain intact, guaranteed the heat insulation effect of whole thermal insulation pipe.
Description of drawings
Fig. 1 is heat expansion-proof vacuum heat-preserving tube first embodiment's of the present invention structural representation.
Fig. 2 is heat expansion-proof vacuum heat-preserving tube second embodiment's of the present invention structural representation.
Embodiment
Do detailed explanation below in conjunction with the accompanying drawing specific embodiments of the invention.
At first, please refer to Fig. 1, Fig. 1 is heat expansion-proof vacuum heat-preserving tube first embodiment's of the present invention structural representation, among Fig. 1; Deposit Heat Conduction Material 17 in the pipeline 16, Heat Conduction Material 17 can be a liquid, for example water, wet goods; Also can be gas, water vapour for example, Heat Conduction Material 17 absorbs the heat of sunlights; Treat to be used after self temperature is increased to predefined temperature, for example the Heat Conduction Materials 17 in the pipeline 16 be oily, and temperature is increased to the generating that is used for steam turbine after 400 degrees centigrade.Pipeline 16 is a steel pipe, and the interior bore scope of said steel pipe is: 10mm to 40mm, the material of pipeline 16 are steel, because steel has good heat-conducting, therefore, in order to prevent thermal loss, need carry out the insulation measure to steel pipe.
First thermal insulation layer 15 coats the material selection flexibly thermal insulation material of steel pipe 16, the first thermal insulation layers 15 among Fig. 1, is ultra-fine fibre glass or alumina silicate, and the material that first thermal insulation layer 15 is coated with first sealing layer, 14, the first sealing layers 14 is the plastic-aluminum obstructing film.
First thermal insulation layer 15 is less important thermal insulation layer; The main effect of first thermal insulation layer 15 and first sealing layer 14 is to prevent that steel pipe 16 is under the situation of thermal expansion; Avoiding main thermal insulation layer is that second thermal insulation layer 13 and second sealing layer 12 are damaged, thereby influences heat insulation effect.Second thermal insulation layer 13 coats first sealing layer, 14, the second sealing layers 12 and coats second thermal insulation layer 13.The material of second thermal insulation layer 13 is a flexibly thermal insulation material, is ultra-fine fibre glass or alumina silicate.The material of second sealing layer 12 is the plastic-aluminum obstructing film.
Because it is antivacuum that the vacuum heat-preserving effect generally is better than, therefore, outside second thermal insulation layer 13, coat second sealing layer 12 and be convenient to vacuumize; In the both sides of second sealing layer 12, be provided with insulation end cap 18, in existing technology is handled; Be directly second sealing layer, 12 two ends to be pasted,, do not possess effect of heat insulation because sealing layer is the plastic-aluminum obstructing film; Therefore, according to processing method of the prior art, at the two ends of second sealing layer 12; Steel pipe will directly contact with air through sealing layer, does not have heat preservation effect.Insulation end cap 18 is to adopt rigid heat insulating material; When playing heat insulation effect, play a supportive role,, be easy to scratched because 12 employings of second sealing layer is the plastic-aluminum obstructing film; Therefore; Covered with metal layer 11 outside second sealing layer 12, main effect is protection second thermal insulation layer 13 and second sealing layer 12, has also improved heat preservation effect simultaneously.
Then; Please refer to Fig. 2, Fig. 2 is heat expansion-proof vacuum heat-preserving tube second embodiment's of the present invention structural representation, and second embodiment is with respect to first embodiment; On insulation end cap 18, be provided with two vacuum pumping mouthes 27, the quantity of vacuum pumping mouth 27 can be set according to actual needs.What link to each other with vacuum pumping mouth 27 is air pipe 28; Air pipe 28 1 ends connect vacuum pumping mouth 27; The other end connection evacuator (not shown) vacuumizes second thermal insulation layer 13 that second sealing layer 12 coats through evacuator, thereby reaches the effect of vacuum heat-preserving.
Though the present invention discloses as above with preferred embodiment, the present invention is defined in this.Any those skilled in the art are not breaking away from the spirit and scope of the present invention, all can do various changes and modification, so protection scope of the present invention should be as the criterion with claim institute restricted portion.
Claims (10)
1. heat expansion-proof vacuum heat-preserving tube comprises:
Pipeline, said pipeline is a steel pipe, is used to deposit Heat Conduction Material;
It is characterized in that said vacuum heat-preserving tube also comprises:
First thermal insulation layer coats said steel pipe;
First sealing layer coats said first thermal insulation layer;
Second thermal insulation layer coats said first sealing layer;
Second sealing layer coats said second thermal insulation layer;
Be incubated end cap, be positioned at the both sides of said second thermal insulation layer, and all be connected with said first sealing layer, second sealing layer;
Metal protective case layer coats said second sealing layer.
2. heat expansion-proof vacuum heat-preserving tube according to claim 1 is characterized in that: said steel pipe is a large-diameter steel pipe, and the interior bore scope of said steel pipe is: 100mm to 400mm.
3. heat expansion-proof vacuum heat-preserving tube according to claim 1 is characterized in that: the material of said first thermal insulation layer is a flexibly thermal insulation material.
4. according to claim 1 or 3 described heat expansion-proof vacuum heat-preserving tubes, it is characterized in that: the material of said first thermal insulation layer is ultra-fine fibre glass or alumina silicate.
5. heat expansion-proof vacuum heat-preserving tube according to claim 1 is characterized in that: the material of said second thermal insulation layer is a flexibly thermal insulation material.
6. according to claim 1 or 5 described heat expansion-proof vacuum heat-preserving tubes, it is characterized in that: the material of said second thermal insulation layer is ultra-fine fibre glass or alumina silicate.
7. heat expansion-proof vacuum heat-preserving tube according to claim 1 is characterized in that: the material of said first sealing layer is the plastic-aluminum obstructing film.
8. heat expansion-proof vacuum heat-preserving tube according to claim 1 is characterized in that: the material of said second sealing layer is the plastic-aluminum obstructing film.
9. heat expansion-proof vacuum heat-preserving tube according to claim 1 is characterized in that: said vacuum heat-preserving tube also comprises a plurality of vacuum pumping mouthes, and said vacuum pumping mouth all is arranged on the said insulation end cap.
10. heat expansion-proof vacuum heat-preserving tube according to claim 6 is characterized in that: said vacuum heat-preserving tube also comprises a plurality of air pipes, and a said air pipe is connected with a said vacuum pumping mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100495034A CN102654232A (en) | 2011-03-01 | 2011-03-01 | Thermal expansion-proof vacuum thermal-insulation pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100495034A CN102654232A (en) | 2011-03-01 | 2011-03-01 | Thermal expansion-proof vacuum thermal-insulation pipe |
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| CN102654232A true CN102654232A (en) | 2012-09-05 |
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| CN2011100495034A Pending CN102654232A (en) | 2011-03-01 | 2011-03-01 | Thermal expansion-proof vacuum thermal-insulation pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106641719A (en) * | 2017-02-08 | 2017-05-10 | 邢台中测仪器设备有限公司 | Liquefied natural gas dispenser calibrating device and method |
| CN111256874A (en) * | 2020-03-23 | 2020-06-09 | 浙江师范大学 | Method for solving cross sensitivity of magnetic fluid and optical fiber to temperature |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02154894A (en) * | 1988-12-05 | 1990-06-14 | Matsushita Refrig Co Ltd | Heat insulator |
| RU1807290C (en) * | 1990-10-19 | 1993-04-07 | В.А.Павлов и И.Е.Москаленко | Pipe line with vacuum insulation |
| CN2295899Y (en) * | 1997-03-19 | 1998-10-28 | 王小宁 | Metal membrane attached thermal insulating layer for high and low temperature installation containers and pipelines |
| CN1850502A (en) * | 2005-04-22 | 2006-10-25 | 海尔集团公司 | Aerospace thermal-insulated plate and its preparing process |
| CN201330914Y (en) * | 2008-12-26 | 2009-10-21 | 深圳市文川实业有限公司 | Perfusion tube with vacuum layer |
| JP2009264712A (en) * | 2008-04-30 | 2009-11-12 | Daikin Ind Ltd | Vacuum pipe type solar heat collector and heating system |
| CN101900241A (en) * | 2010-06-18 | 2010-12-01 | 益科博能源科技（上海）有限公司 | Manufacture method of vacuum heat-insulating pipe |
-
2011
- 2011-03-01 CN CN2011100495034A patent/CN102654232A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02154894A (en) * | 1988-12-05 | 1990-06-14 | Matsushita Refrig Co Ltd | Heat insulator |
| RU1807290C (en) * | 1990-10-19 | 1993-04-07 | В.А.Павлов и И.Е.Москаленко | Pipe line with vacuum insulation |
| CN2295899Y (en) * | 1997-03-19 | 1998-10-28 | 王小宁 | Metal membrane attached thermal insulating layer for high and low temperature installation containers and pipelines |
| CN1850502A (en) * | 2005-04-22 | 2006-10-25 | 海尔集团公司 | Aerospace thermal-insulated plate and its preparing process |
| JP2009264712A (en) * | 2008-04-30 | 2009-11-12 | Daikin Ind Ltd | Vacuum pipe type solar heat collector and heating system |
| CN201330914Y (en) * | 2008-12-26 | 2009-10-21 | 深圳市文川实业有限公司 | Perfusion tube with vacuum layer |
| CN101900241A (en) * | 2010-06-18 | 2010-12-01 | 益科博能源科技（上海）有限公司 | Manufacture method of vacuum heat-insulating pipe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106641719A (en) * | 2017-02-08 | 2017-05-10 | 邢台中测仪器设备有限公司 | Liquefied natural gas dispenser calibrating device and method |
| CN111256874A (en) * | 2020-03-23 | 2020-06-09 | 浙江师范大学 | Method for solving cross sensitivity of magnetic fluid and optical fiber to temperature |
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Application publication date: 20120905 |