CN103629836A - Vacuum heat collecting pipe - Google Patents
Vacuum heat collecting pipe Download PDFInfo
- Publication number
- CN103629836A CN103629836A CN201310647026.0A CN201310647026A CN103629836A CN 103629836 A CN103629836 A CN 103629836A CN 201310647026 A CN201310647026 A CN 201310647026A CN 103629836 A CN103629836 A CN 103629836A
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- China
- Prior art keywords
- glass outer
- pipe
- vacuum heat
- metal inner
- outer tube
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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
- Y02E10/40—Solar thermal energy, e.g. solar towers
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Abstract
The invention relates to a vacuum heat collecting pipe which is mainly used for the field of groove-type solar medium-high temperature heat utilization. The vacuum heat collecting pipe comprises a glass outer pipe (2) and a coaxial metal inner pipe (1); the glass outer pipe (2) sleeves the metal inner pipe (1); the middle of the glass outer pipe (2) is thick and the glass outer pipe (2) is gradually thinned towards both ends; each of both the ends of the glass outer pipe (2) is in sealing connection with one kovar alloy ring (3); each kovar alloy ring (3) is connected with a bellows (4); and two bellows (4) are respectively connected with both ends of the metal inner pipe (1). The invention can well solve the problem that in the operating process of a medium-high temperature heat collecting pipe, due to nonuniform heating, the metal inner pipe is deformed to break the glass outer pipe.
Description
Technical field
The present invention relates to a kind of vacuum heat collection pipe for groove type heat collector.
Background technology
Vacuum heat collection pipe, as photo-thermal converting member, is used in combination with paraboloid trough type concentrator, forms parabolic trough collector, can provide heat energy for solar energy thermal-power-generating, solar seawater desalination, solar airconditioning, industrial production etc.
Proper property due to groove type heat collector, determined that vacuum heat collection pipe tube wall when work is one-sided being heated all the time, and the radiant flux intensity that parabolic mirror reflects focuses on is high and skewness, cause the metal inner pipe of vacuum heat collection pipe on axial and circumferential, to produce larger thermograde and thermal stress, make vacuum heat collection pipe crooked towards paraboloid trough type concentrator direction, be out of shape maximum position and generally occur in metal inner pipe middle part.Excessive when metal inner pipe distortion, will contact with glass outer tube wall, by the bursting of glass outer tube, make vacuum heat-collecting tube failure.From the operation and maintenance statistics at 9 trough type solar power generation stations of the U.S., find, the inefficacy of vacuum heat collection pipe and damage are the principal elements that causes the maximum economic loss of solar thermal power plants, between 9～11 years of SEGS VI～IX power station operation, year breakage rate of vacuum heat collection pipe is about 3%～4%.Changing vacuum heat collection pipe is a quite loaded down with trivial details job, and if careless manipulation is easy to make conduction oil to be leaked in soil, contaminated soil.
The groove type heat collector vacuum heat collection pipe of making according to Chinese patent CN101975480B, CN101986060B, CN20185233U, the outer tube shape of its glass is all isodiametric cylinder, in order to provide deformation space to metal inner pipe, need to strengthen the diameter of glass outer tube, the diameter that strengthens glass outer tube will strengthen the diameter of expensive kovar alloy ring and bellows thereupon, cause the cost of vacuum tube to improve.
Summary of the invention
The object of the invention is to overcome the shortcoming of prior art, the feature of being heated while working on groove type heat collector according to vacuum heat collection pipe, provides a kind of vacuum heat collection pipe that has larger tolerance that vacuum heat collection pipe metal inner pipe is out of shape.The present invention can improve the reliability of vacuum heat collection pipe.
To achieve these goals, the technical solution adopted in the present invention is:
Vacuum heat collection pipe comprises a glass outer tube and a coaxial metal inner pipe, and described glass outer tube sleeve is outside described metal inner pipe; Thick in the middle of described glass outer tube, to two ends, be tapered, and at its two ends gradually transition be straight cylinder, to carry out sealing-in with kovar alloy ring, the length of right circular cylinder is not more than the diameter of metal inner pipe.The first end of two described kovar alloy rings respectively with the two ends sealing-in of described glass outer tube, described in each, the second end of kovar alloy ring is connected with the first end of a bellows; The second end of two described bellowss is connected with the two ends of described metal inner pipe respectively.
When metal inner pipe middle part deforms, because the diameter of corresponding glass outer tube middle part is larger, with regard to can be the distortion of metal inner pipe, provide larger space.
Advantage of the present invention is that the distortion that glass outer tube still can be metal inner pipe provides larger space, improves the reliability of vacuum heat collection pipe when the kovar alloy ring of vacuum heat collection pipe employing small diameter and bellows, and the cost of vacuum heat collection pipe is also lower simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of vacuum heat collection pipe of the present invention.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
As shown in Figure 1, vacuum heat collection pipe comprises a glass outer tube 2 and a coaxial metal inner pipe 1, and glass outer tube 2 is placed on outside metal inner pipe 1; Thick and be tapered to two ends in the middle of being shaped as of glass outer tube 2, glass outer tube 2 at its two ends gradually transition be straight cylinder, to carry out sealing-in with kovar alloy ring 3, the length of right circular cylinder is L, is not more than the diameter d of metal inner pipe 1; The first end 301 of two kovar alloy rings 3 respectively with the two ends sealing-in of glass outer tube 2, the second end 302 of each kovar alloy ring 3 is connected with the first end 401 of a bellows 4; The second end 402 of two bellowss 4 is connected with the two ends of metal inner pipe 1 respectively.
Claims (3)
1. a vacuum heat collection pipe, comprise a glass outer tube (2) and a coaxial metal inner pipe (1), described glass outer tube (2) is placed on outside described metal inner pipe (1), the two ends of described glass outer tube (2) all with first end (301) sealing-in of a kovar alloy ring (3), described in each, second end (302) of kovar alloy ring (3) and the first end (401) of a bellows (4) are connected, second end (402) of two bellowss 4 is connected with the two ends of metal inner pipe (1) respectively, it is characterized in that, thick and be tapered to two ends in the middle of being shaped as of described glass outer tube (2).
2. vacuum heat collection pipe as claimed in claim 1, is characterized in that, glass outer tube (2) at its two ends gradually transition be straight cylinder, to connect with kovar alloy ring seal.
3. vacuum heat collection pipe as claimed in claim 1, is characterized in that, the length of the right circular cylinder at glass outer tube (2) two ends is not more than the diameter of metal inner pipe (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310647026.0A CN103629836A (en) | 2013-12-04 | 2013-12-04 | Vacuum heat collecting pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310647026.0A CN103629836A (en) | 2013-12-04 | 2013-12-04 | Vacuum heat collecting pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103629836A true CN103629836A (en) | 2014-03-12 |
Family
ID=50211133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310647026.0A Pending CN103629836A (en) | 2013-12-04 | 2013-12-04 | Vacuum heat collecting pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103629836A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5640050A (en) * | 1979-09-05 | 1981-04-16 | Nippon Electric Glass Co Ltd | Solar energy collecting tube and manufacture of the same |
| JPS58203343A (en) * | 1982-05-21 | 1983-11-26 | Hitachi Ltd | Solar heat collector |
| CN1608189A (en) * | 2001-11-13 | 2005-04-20 | 索勒尔太阳能系统有限公司 | Radiation heat-shield for solar system |
| CN2937941Y (en) * | 2006-07-10 | 2007-08-22 | 刘在祥 | Accumulation high temp glass heat collecting pipe |
| CN101135501A (en) * | 2006-08-28 | 2008-03-05 | 中国科学院电工研究所 | High-temperature solar thermal-collecting tube and manufacturing process thereof |
| CN201599962U (en) * | 2009-12-18 | 2010-10-06 | 河北光源太阳能有限公司 | Improved all-glass internal condensation vacuum solar collector |
| CN201740293U (en) * | 2010-07-24 | 2011-02-09 | 湖北华扬太阳能集团有限公司 | Glass-metal seal type solar evacuated collector tube |
-
2013
- 2013-12-04 CN CN201310647026.0A patent/CN103629836A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5640050A (en) * | 1979-09-05 | 1981-04-16 | Nippon Electric Glass Co Ltd | Solar energy collecting tube and manufacture of the same |
| JPS58203343A (en) * | 1982-05-21 | 1983-11-26 | Hitachi Ltd | Solar heat collector |
| CN1608189A (en) * | 2001-11-13 | 2005-04-20 | 索勒尔太阳能系统有限公司 | Radiation heat-shield for solar system |
| CN2937941Y (en) * | 2006-07-10 | 2007-08-22 | 刘在祥 | Accumulation high temp glass heat collecting pipe |
| CN101135501A (en) * | 2006-08-28 | 2008-03-05 | 中国科学院电工研究所 | High-temperature solar thermal-collecting tube and manufacturing process thereof |
| CN201599962U (en) * | 2009-12-18 | 2010-10-06 | 河北光源太阳能有限公司 | Improved all-glass internal condensation vacuum solar collector |
| CN201740293U (en) * | 2010-07-24 | 2011-02-09 | 湖北华扬太阳能集团有限公司 | Glass-metal seal type solar evacuated collector tube |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140312 |