CN203116348U - Solar vacuum heat collection tube - Google Patents
Solar vacuum heat collection tube Download PDFInfo
- Publication number
- CN203116348U CN203116348U CN 201320155389 CN201320155389U CN203116348U CN 203116348 U CN203116348 U CN 203116348U CN 201320155389 CN201320155389 CN 201320155389 CN 201320155389 U CN201320155389 U CN 201320155389U CN 203116348 U CN203116348 U CN 203116348U
- Authority
- CN
- China
- Prior art keywords
- glass outer
- outer tube
- metal inner
- vacuum heat
- tube
- 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.)
- Expired - Lifetime
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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
Abstract
The utility model discloses a solar vacuum heat collection tube. The solar vacuum heat collection tube comprises a metal inner tube, a glass outer tube, a flange plate and an annular connecting part. Annular space is formed after the metal inner tube is sleeved in the glass outer tube, and a getter structure assembly is arranged inside the annular space. The end portion of the glass outer tube is connected with a glassy metal transition part by adopting a fusing-sealing process, and connects the glass outer tube and the metal inner tube through a sealing flange for forming sealing vacuum environment, wherein the glass outer tube and the glassy metal transition part are sealed in a fusing mode. The metal inner tube has the same coefficient of thermal expansion as the glass outer tube. The solar vacuum heat collection tube has the advantages that on the basis of simplifying the structure of the solar vacuum heat collection tube greatly, expansion compensation of the metal inner tube and the glass outer tube after being heated can be achieved at the same time, and the effective length of an absorbing coating on the end portion of the metal inner tube is increased so that heat collection efficiency of the solar vacuum heat collection tube can be improved.
Description
Technical field
The utility model relates to a kind of device that utilizes solar energy heating, specifically, is a kind of solar vacuum heat-collecting pipe that utilizes.
Background technology
Solar energy is subjected to the increasing concern of people and use in recent years as a kind of new forms of energy of cleanliness without any pollution.Solar energy heat collector at present commonly used is solar vacuum heat-collecting pipe, and it is divided into three kinds of normal temperature vacuum heat collection pipe, middle temperature vacuum heat collection pipe and high-temperature vacuum heat-collecting tubes.Wherein, the normal temperature vacuum heat collection pipe is cheap, but collecting efficiency is not high, and operating temperature is also lower; High-temperature vacuum heat-collecting tube collecting efficiency height, maximum operating temperature can reach 400 ℃～450 ℃, but cost is higher; In warm vacuum heat collection pipe collecting efficiency height, and the middle high-temperature heat-collection pipe of cost is low, project such as warm steam boiler in being applicable to, so be with a wide range of applications, market potential is huge.Yet the maximum temperature of temperature solar vacuum heat-collecting tube is 200～250 ℃ in existing, and common range of application only is between 120 ℃～160 ℃, and complex manufacturing, and the process-cycle is longer.
The utility model content
In order to solve existing the problems referred to above, the utility model proposes a kind of solar vacuum heat-collecting pipe, comprise metal inner pipe, glass outer tube, ring flange and circular connector.Wherein, the glass outer coaxial tube is enclosed within the metal inner pipe outside, and the coaxial welding ring flange that makes progress in two ends week, the ring flange at metal inner pipe two ends all are connected by an annular connecting ring and glass outer tube two ends end face, make between metal inner pipe and glass outer tube and form vacuum interlayer; Metal inner pipe is identical with the coefficient of expansion between the glass outer tube, realizes the expansion compensation after metal inner pipe and glass outer tube are heated thus.
Advantage of the present utility model is:
1, the utility model solar vacuum heat-collecting pipe adopts pipe in the new type of metal, and it has the thermal coefficient of expansion identical with the glass outer tube, does not need to install new expansion compensation structure, just can realize the expansion compensation after metal inner pipe and glass outer tube are heated; The structure of significantly having simplified solar vacuum heat-collecting pipe thus, and then increased the absorber coatings effective length of metal tube end, improved the collecting efficiency of vacuum heat collection pipe;
2, the utility model solar vacuum heat-collecting pipe is easy to assembly, and sealing property is superior.
Description of drawings
Fig. 1 is solar vacuum heat-collecting pipe overall structure schematic diagram of the present invention.
Among the figure:
1-metal inner pipe 2-glass outer tube 3-ring flange 4-circular connector
The specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
A kind of solar vacuum heat-collecting pipe of the utility model comprises metal inner pipe, glass outer tube, ring flange and circular connector.
Wherein, the glass outer tube sleeve is in the metal inner pipe outside, the coaxial welding ring flange that makes progress in two ends week, the ring flange at metal inner pipe two ends all is connected by an annular connecting ring and glass outer tube two ends end face, realizes coaxial fixing between metal inner pipe and glass outer tube by circular connector thus; Make between metal inner pipe and glass outer tube and form vacuum interlayer, thereby reduce heat conduction and thermal convection current, play insulation effect, improve the solar collecting performance of thermal-collecting tube.Also designing on the glass outer tube has exhaust outlet, is used for vacuum exhaust, makes and forms vacuum environment in the vacuum interlayer.
Metal inner pipe is identical with the coefficient of expansion between the glass outer tube among the present invention, realizes the expansion compensation after metal inner pipe and glass outer tube are heated thus.
Be provided with long-acting getter and nonevaporable getter agent in the described vacuum interlayer; Wherein, long-acting getter is used for absorbing the residual gas (as: H2) that thermal-collecting tube produces in the vacuum interlayer at work, guarantees that vacuum interlayer has good vacuum, prolongs thermal-collecting tube service life.The nonevaporable getter agent is used for monitoring the vacuum state in the vacuum interlayer, guarantees the observation vacuum in the vacuum interlayer, also has certain getter action simultaneously.
Be coated with selective absorbing membranous layer on the described metal inner pipe outer wall, can make thermal-collecting tube absorb more photo-thermal; Being coated with of selective absorption film is divided into four layers, be respectively from inside to outside: infrared reflecting layer, absorbed layer, absorbed layer, anti-reflection layer, adopt two ceramic structures, avoided conventional coatings effectively under high-temperature work environment, metal diffusion between the migration of metallic atom in coating, gathering and the layer-layer, thus the stability (list of references: notification number is the patent of invention " a kind of high temperature solar energy selective absorption coating and preparation method thereof " of CN101806508A) of selective absorption film structure and performance under higher temperature guaranteed.The selective absorption film absorptivity is 90%～96%, emissivity≤6%(150 ℃), 600 ℃～800 ℃ of maximum operating temperatures.
Lateral wall all adopts sol-gel process (czochralski method) to be coated with ARC in the glass outer tube, forms SiO
2Coating; SiO
2Coating can improve the light transmittance of glass tube, makes more light be transmitted to selective absorption film surface on the metal inner pipe lateral wall, and has higher intensity and anti-thick performance.Be coated with ARC by lateral wall in the glass outer tube light transmittance of glass outer tube is reached more than 95%, effectively improve the solar collecting performance of thermal-collecting tube thus.
The said structure solar vacuum heat-collecting pipe is when work, the thermal-arrest medium flows in metal inner pipe, sunshine sees through the glass outer tube and shines the selective absorption film surface, selective absorption film absorbs solar energy and is converted into heat energy, pass to the thermal-arrest medium, by the higher vacuum of vacuum interlayer, reduce heat conduction and thermal convection current, play insulation effect.
Claims (6)
1. a solar vacuum heat-collecting pipe is characterized in that: comprise metal inner pipe, glass outer tube, ring flange and circular connector;
Wherein, the glass outer coaxial tube is enclosed within the metal inner pipe outside, and the coaxial welding ring flange that makes progress in two ends week, the ring flange at metal inner pipe two ends all are connected by an annular connecting ring and glass outer tube two ends end face, make between metal inner pipe and glass outer tube and form vacuum interlayer; Metal inner pipe is identical with the coefficient of expansion between the glass outer tube, realizes the expansion compensation after metal inner pipe and glass outer tube are heated thus.
2. a kind of solar vacuum heat-collecting pipe according to claim 1, it is characterized in that: design has exhaust outlet on the described glass outer tube.
3. a kind of solar vacuum heat-collecting pipe according to claim 1 is characterized in that: be provided with long-acting getter and nonevaporable getter agent in the described vacuum interlayer.
4. a kind of solar vacuum heat-collecting pipe according to claim 1 is characterized in that: be coated with selective absorbing membranous layer on the described metal inner pipe outer wall.
5. as a kind of solar vacuum heat-collecting pipe as described in the claim 4, it is characterized in that: being coated with of described selective absorption film is divided into four layers, is respectively from inside to outside: infrared reflecting layer, absorbed layer, absorbed layer, anti-reflection layer, adopt two ceramic structures.
6. a kind of solar vacuum heat-collecting pipe according to claim 1, it is characterized in that: lateral wall all has been coated with ARC in the described glass outer tube, forms SiO
2Coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320155389 CN203116348U (en) | 2013-03-29 | 2013-03-29 | Solar vacuum heat collection tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320155389 CN203116348U (en) | 2013-03-29 | 2013-03-29 | Solar vacuum heat collection tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203116348U true CN203116348U (en) | 2013-08-07 |
Family
ID=48896684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320155389 Expired - Lifetime CN203116348U (en) | 2013-03-29 | 2013-03-29 | Solar vacuum heat collection tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203116348U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103992025A (en) * | 2014-04-30 | 2014-08-20 | 王昆玉 | Production technology for flange-tube-orifice type all-glass evacuated solar collector tube |
-
2013
- 2013-03-29 CN CN 201320155389 patent/CN203116348U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103992025A (en) * | 2014-04-30 | 2014-08-20 | 王昆玉 | Production technology for flange-tube-orifice type all-glass evacuated solar collector tube |
| CN103992025B (en) * | 2014-04-30 | 2016-03-16 | 王昆玉 | The production technique of flange mouth of pipe formula complete glass vacuum sun thermal-collecting tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130807 |
|
| CX01 | Expiry of patent term |