CN201652954U - Trough solar vacuum collector tube with built-in expansion joints - Google Patents
Trough solar vacuum collector tube with built-in expansion joints Download PDFInfo
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- CN201652954U CN201652954U CN2010201736753U CN201020173675U CN201652954U CN 201652954 U CN201652954 U CN 201652954U CN 2010201736753 U CN2010201736753 U CN 2010201736753U CN 201020173675 U CN201020173675 U CN 201020173675U CN 201652954 U CN201652954 U CN 201652954U
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- tube
- expansion joint
- metal tube
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- glass 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 utility model relates to a trough solar vacuum collector tube with built-in expansion joints, belonging to the technical field of solar energy collection facilities. The solar vacuum collector tube comprises a metal tube and a glass tube, wherein a hot coating is coated on the outer surface of the metal pipe, the glass tube is sleeved in the middle of the metal tube, a vacuum layer is formed between the metal tube and the glass tube, two ends of the metal tube are respectively sleeved with an expansion joint, the expansion joints are disposed in the glass tube, and inner ends of the expansion joints are welded with the metal tube while outer ends thereof are welded with a kovar alloy transition part and are sealed with ends of the glass tube via kovar alloy. The glass tube is longer than a hot absorbing section of the metal tube so that incoming solar energy of the vacuum collector tube is increased, thereby increasing efficiency of the collector tube. Simultaneously, the solar vacuum collector tube with enough strength and rigidity can complete system integrated installation conveniently, and is particularly applicable to high-temperature solar thermal power generation and the like.
Description
Technical field
The utility model relates to a kind of vacuum heat collection pipe, and especially a kind of architecture advances that is applied in the vacuum heat collection pipe in the solar energy utilization system belongs to solar energy heating facility technology field.
Background technology
Vacuum heat collection pipe is the core devices in the Solar Energy Heat Utilization System.Understand according to the applicant, the conventional structure of present domestic glass-metal straight-through type solar energy vacuum heat collecting tube is to cover solar energy absorbing coating on the metal tube, the metal tube outer casing glass tube vacuumizes between glass tube and metal tube, adopts the kovar alloy transition sealing between the two.Because the coefficient of expansion of metal tube is much larger than glass tube, and the inner and outer pipes temperature differs bigger, and therefore when temperature was higher, the swell increment of metal tube was much larger than the swell increment of glass tube.
Find by retrieval, Chinese utility model patent ZL 200620076860.4, " outer expanded-type solar vacuum heat-collecting pipe " effectively compensated the swell increment of back glass tube less than metal tube that heat up.Its technical scheme that adopts is: after passing through the kovar alloy transition on the glass tube, load onto expansion joint, and again with the metal tube sealing-in, glass tube length+expansion joint length=metal tube endotherm section length.The solar vacuum heat-collecting pipe major defect of this structure is: expansion joint has covered the part solar energy and has entered in the pipe, is invalid length, has reduced the incident solar energy of vacuum heat collection pipe, has reduced the efficient of vacuum heat collection pipe.
The utility model content
The utility model wants the technical solution problem to be: at the shortcoming of above prior art existence, provide a kind of expansion joint built-in groove type solar vacuum heat collection pipe, not only properly settle glass and thermal expansion metal difference of coefficients problem, and improve the vacuum heat collection pipe effective length.
In order to solve above technical problem, the built-in solar vacuum heat-collecting pipe of expansion joint of the present utility model, comprise that outer surface applies the metal tube of heat absorbing coating, is sleeved on the glass tube at described metal tube middle part, form vacuum layer between metal tube and the glass tube, be set with expansion joint near the two ends of described metal tube, it is characterized in that: described expansion joint is positioned at glass tube, the inner of expansion joint and metal tube welding, outer end and the welding of kovar alloy transition piece are again by kovar alloy and the sealing-in of glass tube termination.
The utility model further improves, in order to be applied to high temperature occasions such as solar energy thermal-power-generating, consider the sealing-in temperature tolerance between kovar alloy and glass tube, the glass tube of the built-in solar vacuum heat-collecting pipe of expansion joint with can cut down sealing-in place position and install protective cover additional.
The utility model has been properly settled glass tube and metal tube thermal expansion amount difference problem, and adopts glass tube length greater than metal tube endotherm section length, has increased the incident solar energy of vacuum heat collection pipe, thereby improves the efficient of thermal-collecting tube.The built-in solar vacuum heat-collecting pipe intensity of expansion joint height, good rigidly, connection are reliable, can keep long term seal, thereby satisfy the needs of high-power applications occasion.
During work, sunshine sees through glass tube and passes vacuum layer, shines on the metal tube that is coated with heat absorbing coating, thereby exports after the working medium in the heating metal pipe.Because interior pipe based on metal tube, under the cooperation that self-centering is supported, even length is long again, also can have enough intensity and rigidity, the system of being convenient to installs integrated, thereby can satisfy the needs of high-power thermal-arrest.And after adding protective cover, can prevent the focused ray direct irradiation at the metal-glass sealing place, be suitable for the occasions such as solar energy thermal-power-generating of high temperature.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is the structural representation of the utility model embodiment one.
Fig. 2 is that the A of Fig. 1 embodiment is to partial view.
Fig. 3 is the B-B profile of Fig. 1 embodiment.
Fig. 4 is the structural representation of the utility model embodiment two.
Fig. 5 is the structural representation of the utility model embodiment three.
Fig. 6 is the structural representation of the utility model embodiment four.
Among the figure 1 is expansion joint, the 2nd, kovar alloy, the 3rd, and glass tube, the 4th, vacuum layer, the 5th, metal tube, the 6th absorbs sunshine coating, the 7th, hold-down support, the 8th, getter, the 9th, protective cover, 10 annular support members.
The specific embodiment
Embodiment one
The built-in solar vacuum heat-collecting pipe of the expansion joint of present embodiment as shown in Figure 1, its structure is that glass tube 3 is enclosed within on the metal tube 5 at center, places getter 8 in the pipe, with reach and holding tube in vacuum, form vacuum layer 4.Metal tube 5 surfaces scribble and absorb sunshine coating 6.Near reducing corrugated-type expansion joint 1 of difference overcoat metal tube 5 two ends.The inner of this reducing corrugated-type expansion joint 1 and metal tube 5 welding, direct and kovar alloy 2 welding of the other end, this kovar alloy 2 and glass tube 5 termination sealing-ins, thereby the differences in expansion between realization compensation intensification back glass tube and the metal tube.The centre of metal tube 5 installs two self-centerings additional and supports 7, its concrete structure as shown in Figures 2 and 3, this self-centering is supported by circular arc supporting seat 7-3, elasticity support sheet 7-2, a 7-1 that conflicts and is constituted, arc radius and the metal tube external diameter of circular arc supporting seat 7-3 match, be fixed on outside the metal tube 5, elasticity support sheet 7-2 is gone up to both sides by circular arc supporting seat 7-3 and stretches, and the conflict 7-1 by the end is resisted against in the glass tube and locatees.During assembling, self-centering is supported two one group, is separately fixed at symmetry place, metal tube two ends, plays the centering supporting role between metal tube 5 and glass tube 3, and this structure can be eliminated the stress that thermal deformation difference produces, and is very reasonable.
Embodiment two
The built-in solar vacuum heat-collecting pipe of the expansion joint of present embodiment as shown in Figure 4, its basic structure is identical with embodiment one.Difference is that corrugated-type expansion joint 1 is a tubular structure, two ends bore unanimity.Other structure is identical with above embodiment, does not repeat in addition.
Embodiment three
The built-in solar vacuum heat-collecting pipe of the expansion joint of present embodiment as shown in Figure 5, its basic structure is identical with embodiment one.Difference is, the built-in solar vacuum heat-collecting pipe of expansion joint two ends are set with an annular support member 10 that can slide on metal tube 5, and annular support member 10 connects as one with kovar alloy 2, and annular support member 10 can be played a supporting role.
Embodiment four
The built-in solar vacuum heat-collecting pipe of the expansion joint of present embodiment as shown in Figure 6, its basic structure is identical with embodiment two.Difference is, the built-in solar vacuum heat-collecting pipe of expansion joint two ends after glass tube 3 and kovar alloy 2 sealing-ins, are connected with an annular support member 10 that can slide on metal tube 5, and annular support member 10 can be played a supporting role.
Embodiment five
The built-in solar vacuum heat-collecting pipe of the expansion joint of present embodiment as shown in Figure 5, its basic structure is identical with embodiment three.Difference is, the built-in solar vacuum heat-collecting pipe of expansion joint two ends, and kovar alloy 2 is a single piece with annular support member 10, promptly annular support member 10 also is a kovar alloy.
Embodiment six
The built-in solar vacuum heat-collecting pipe of the expansion joint of present embodiment as shown in Figure 6, its basic structure is identical with embodiment four.Difference is, the built-in solar vacuum heat-collecting pipe of expansion joint two ends, and the built-in solar vacuum heat-collecting pipe of expansion joint two ends, kovar alloy 2 is a single piece with annular support member 10, promptly annular support member 10 also is a kovar alloy.
Facts have proved, the built-in solar vacuum heat-collecting pipe of the expansion joint of above embodiment, the thermal deformation difference problem of glass tube and metal tube in properly settling has in all its bearings increased the incident solar energy of vacuum heat collection pipe, thereby improves the efficient of thermal-collecting tube.Easy to install, have enough intensity, rigidity and heat resistance, and technology is simple, cost economy particularly is suitable for the occasions such as solar energy thermal-power-generating of high temperature, compared with prior art, has significant substantive distinguishing features and outstanding progress.
In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.
Claims (7)
1. built-in solar vacuum heat-collecting pipe of expansion joint, comprise that outer surface applies the metal tube of heat absorbing coating, is sleeved on the glass tube at described metal tube middle part, form vacuum layer between metal tube and the glass tube, be set with expansion joint near the two ends of described metal tube, it is characterized in that: described expansion joint is positioned at glass tube, the inner of expansion joint and metal tube welding, outer end and the welding of kovar alloy transition piece are again by kovar alloy and the sealing-in of glass tube termination.
2. according to the built-in solar vacuum heat-collecting pipe of the described expansion joint of claim 1, it is characterized in that: described metal tube is fixed with the protective cover that covers glass tube and kovar alloy sealing-in position for overhanging section respectively.
3. according to the built-in solar vacuum heat-collecting pipe of the described expansion joint of claim 2, it is characterized in that: self-centering is housed between described metal tube and the glass tube supports, described self-centering is supported two one group, is separately fixed at metal tube bilateral symmetry place.
4. according to the built-in solar vacuum heat-collecting pipe of the described expansion joint of claim 3, it is characterized in that: described self-centering is supported by circular arc supporting seat, elasticity support sheet, the head of conflicting and is constituted, the arc radius of described circular arc supporting seat and metal tube external diameter match, be fixed on outside the metal tube, described elasticity support sheet is by stretching to both sides on the circular arc supporting seat, and the conflict head by the end is resisted against in the glass tube locatees.
5. according to the built-in solar vacuum heat-collecting pipe of each described expansion joint of claim 1-4, it is characterized in that: described expansion joint is a kind of in reducing corrugated-type expansion joint or the tubular corrugated-type expansion joint.
6. according to the built-in solar vacuum heat-collecting pipe of the described expansion joint of claim 5, it is characterized in that: described metal tube two ends pine is with annular support member, and described annular support member and kovar alloy connect as one.
7. according to the built-in solar vacuum heat-collecting pipe of the described expansion joint of claim 6, it is characterized in that: described annular support member and kovar alloy are a single piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201736753U CN201652954U (en) | 2010-04-29 | 2010-04-29 | Trough solar vacuum collector tube with built-in expansion joints |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201736753U CN201652954U (en) | 2010-04-29 | 2010-04-29 | Trough solar vacuum collector tube with built-in expansion joints |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201652954U true CN201652954U (en) | 2010-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201736753U Expired - Fee Related CN201652954U (en) | 2010-04-29 | 2010-04-29 | Trough solar vacuum collector tube with built-in expansion joints |
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| CN (1) | CN201652954U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607203A (en) * | 2012-03-06 | 2012-07-25 | 东南大学 | Chained high-temperature solar collector tube |
| CN103075828A (en) * | 2013-01-31 | 2013-05-01 | 卢孟磊 | Silicon dioxide (SiO2) aerogel trough-type solar heat-collecting tube and preparation method thereof |
| CN108826715A (en) * | 2018-08-13 | 2018-11-16 | 内蒙古工业大学 | A kind of step phase-change accumulation energy high temperature straight through heat collection tube |
| WO2021027233A1 (en) * | 2019-08-09 | 2021-02-18 | 芜湖美的厨卫电器制造有限公司 | Phase-change water heater |
-
2010
- 2010-04-29 CN CN2010201736753U patent/CN201652954U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607203A (en) * | 2012-03-06 | 2012-07-25 | 东南大学 | Chained high-temperature solar collector tube |
| CN103075828A (en) * | 2013-01-31 | 2013-05-01 | 卢孟磊 | Silicon dioxide (SiO2) aerogel trough-type solar heat-collecting tube and preparation method thereof |
| CN108826715A (en) * | 2018-08-13 | 2018-11-16 | 内蒙古工业大学 | A kind of step phase-change accumulation energy high temperature straight through heat collection tube |
| WO2021027233A1 (en) * | 2019-08-09 | 2021-02-18 | 芜湖美的厨卫电器制造有限公司 | Phase-change water heater |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20130429 |