CN101081722A - Pipe orifice annealing technique for all-glass vacuum thermal-collecting tube - Google Patents
Pipe orifice annealing technique for all-glass vacuum thermal-collecting tube Download PDFInfo
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- CN101081722A CN101081722A CN 200610083219 CN200610083219A CN101081722A CN 101081722 A CN101081722 A CN 101081722A CN 200610083219 CN200610083219 CN 200610083219 CN 200610083219 A CN200610083219 A CN 200610083219A CN 101081722 A CN101081722 A CN 101081722A
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Abstract
The annealing process of mouth in all glass vacuum heat collecting pipe is baking and exhausting air immediately after fusing and sealing the mouths of both inner pipe and outer pipe of the heat collecting pipe. The pipe mouth annealing temperature and time are dependent on the glass material and stress, and for high boron silica glass, the pipe mouth annealing temperature is 570 deg.c and the annealing time is 3-4 min. There are two sets of heater and two sets of temperature controller separately for annealing and baking and exhausting air.
Description
Technical field
The present invention relates to a kind of all-glass vacuum thermal-collecting tube (hereinafter to be referred as thermal-collecting tube) pipe orifice annealing technique, in exhaust process, carry out mouth of pipe annealed production technique, belong to the technical field of solar energy production.
Background technology
Mouth of pipe annealing is the important public step of producing thermal-collecting tube, purpose is the permanent stress that produces when pipe is with outer tube mouth of pipe sealing by fusing in eliminating, improve the physical strength of thermal-collecting tube, in the process that thermal-collecting tube is produced, extensively a kind of production technique that adopts is behind interior pipe and outer tube mouth of pipe sealing by fusing, carry out mouth of pipe annealing with horizontal combustion gas annealing furnace immediately, and then toast exhaust.
Adopt this production technique to be because gaseous-pressure and composition are difficult to control, cause annealing temperature between 550～650 ℃, to fluctuate, make the annealing effect inconsistent; And interior pipe and the temperature of outer tube be difficult to consistent, pipe annealing weak effect in causing, part still has stress-retained and influences the physical strength of thermal-collecting tube.In addition, mouth of pipe place local heating only reaches 600 ℃ and can't integrally annealed, the automatic improving that also is unfavorable for carrying out follow-up of product quality and Production Flow Chart simultaneously with the thermograde of other positions.
Summary of the invention
The objective of the invention is to provide a kind of pipe orifice annealing technique for all-glass vacuum thermal-collecting tube, and it can overcome above-mentioned shortcoming.Behind interior pipe and outer tube mouth of pipe sealing by fusing, carry out mouth of pipe annealing in the thermal-collecting tube baking gas barrier again, mouth of pipe annealing temperature and annealing time are by the character and the stress relief test decision of annealing back of glass material.
Realize that technical scheme of the present invention is in thermal-collecting tube after pipe and the mouth of pipe sealing by fusing of outer tube, carry out mouth of pipe annealing in the baking exhaust process, the temperature T at mouth of pipe place is for high-boron-silicon glass, and its annealing temperature T is 570 ℃, temperature fluctuation range is ± 5 ℃, and annealing time t is 3-4 minute.Mouth of pipe temperature is higher than the temperature of other parts of thermal-collecting tube, and annealing time is controlled annealing temperature and time and baking exhaust temperature and time also less than the baking evacuation time respectively with two groups of well heaters and two temperature regulators.
Advantage of the present invention is can well control the annealing temperature of high-boron-silicon glass 3.3 at 570 ℃, temperature fluctuation ± 5 ℃, annealing time t is set in not a certain enclosing about 3-4 minute, pipe is consistent with the temperature of outer tube in making in the annealing process, thoroughly eliminate the stress of the mouth of pipe, thereby improve annealing quality, improve the physical strength of thermal-collecting tube, reduced the thermal-collecting tube production process one, the automatic improving that also helps carrying out follow-up of product quality and Production Flow Chart simultaneously.
Description of drawings
The temperature variation of Fig. 1 thermal-collecting tube in exhaust process
Wherein, AF is that exhaust phase AB is that exhaust holding stage CD is that annealing stage EF is a temperature-fall period for warm-up period BE
Embodiment
According to curve shown in Figure 1, the mouth of pipe of the interior pipe of thermal-collecting tube and outer tube weld seal after, temporarily do not carry out mouth of pipe annealing, but directly in the thermal-collecting tube apparatus for baking, toast exhaust, in exhaust process AF section, by on the basis of exhaust temperature, improving the temperature T at mouth of pipe place, control annealing time t and reach annealing temperature and control, to finish annealing (being the CD stage), mouth of pipe annealing temperature T is by the character decision of glass material, for example the annealing temperature T for high-boron-silicon glass is about 570 ℃, and actual temperature should be according to annealing stress test decision.
Annealing time t was set in a certain scope for example 3-4 minute, the annealing time t at thermal-collecting tube mouth of pipe place is by the character and the annealing temperature T decision of glass material, annealing time t for high-boron-silicon glass is 3-4 minute, and actual temperature should be according to annealing stress test decision, therefore respectively annealing temperature and annealing time and baking exhaust temperature and time is controlled with two groups of well heaters and two temperature regulators.
Claims (2)
1. pipe orifice annealing technique for all-glass vacuum thermal-collecting tube, it is characterized in that in thermal-collecting tube after the mouth of pipe sealing by fusing of pipe and outer tube, in the baking exhaust process, carry out mouth of pipe annealing, the temperature T at mouth of pipe place is for high-boron-silicon glass, its annealing temperature T is 570 ℃, temperature fluctuation range is ± 5 ℃, and annealing time t is 3-4 minute.
2. pipe orifice annealing technique for all-glass vacuum thermal-collecting tube according to claim 1, it is characterized in that mouth of pipe temperature is higher than the temperature of other parts of thermal-collecting tube, annealing time is controlled annealing temperature and time and baking exhaust temperature and time also less than the baking evacuation time respectively with two groups of well heaters and two temperature regulators.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610083219 CN101081722A (en) | 2006-05-31 | 2006-05-31 | Pipe orifice annealing technique for all-glass vacuum thermal-collecting tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610083219 CN101081722A (en) | 2006-05-31 | 2006-05-31 | Pipe orifice annealing technique for all-glass vacuum thermal-collecting tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101081722A true CN101081722A (en) | 2007-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610083219 Pending CN101081722A (en) | 2006-05-31 | 2006-05-31 | Pipe orifice annealing technique for all-glass vacuum thermal-collecting tube |
Country Status (1)
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| CN (1) | CN101081722A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101824604A (en) * | 2010-06-12 | 2010-09-08 | 皇明太阳能股份有限公司 | Continuous film coating device and film coating process thereof for inner wall of outer glass tube of solar heat collecting tube |
| CN101265020B (en) * | 2008-04-24 | 2010-12-01 | 皇明太阳能股份有限公司 | Glass pipe eccentric sealing technique |
-
2006
- 2006-05-31 CN CN 200610083219 patent/CN101081722A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101265020B (en) * | 2008-04-24 | 2010-12-01 | 皇明太阳能股份有限公司 | Glass pipe eccentric sealing technique |
| CN101824604A (en) * | 2010-06-12 | 2010-09-08 | 皇明太阳能股份有限公司 | Continuous film coating device and film coating process thereof for inner wall of outer glass tube of solar heat collecting tube |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Open date: 20071205 |