CN104456994A - Production process of solar vacuum collector pipe - Google Patents
Production process of solar vacuum collector pipe Download PDFInfo
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- CN104456994A CN104456994A CN201410703351.9A CN201410703351A CN104456994A CN 104456994 A CN104456994 A CN 104456994A CN 201410703351 A CN201410703351 A CN 201410703351A CN 104456994 A CN104456994 A CN 104456994A
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- vacuum
- pipe
- collector pipe
- tube
- vacuum collector
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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 production process of a solar vacuum collector pipe. Sand blasting is carried out on the outer surface of an inner pipe body, uneven parts with small distances and tiny peaks and valleys are formed on the outer surface of the inner pipe body, the microcosmic heat absorption area of the outer surface of the inner pipe body is increased, the heat absorption area of the solar vacuum collector pipe can be effectively increased, the absorption rate of a selective absorbing coating to solar radiation is improved, and the thermal energy conversion rate of the solar vacuum collector pipe is enhanced. An outer pipe tail pipe is used for carrying out vacuum exhaust processing on a sandwich layer, when the temperature of the vacuum collector pipe is lowered below 150 DEG C and the vacuum degree is 2*10-2 Pa, a high-frequency coil of a high frequency furnace is aligned with degassers at the bottom of the vacuum collector pipe to carry out high-frequency heating, gas contained in the degassers is effectively exhausted, the vacuum degree of the sandwich layer of the vacuum collector pipe is higher, thermal performance of the vacuum collector pipe is better, the solar thermal utilization rate can be effectively improved, heat preservation performance of the vacuum collector pipe is improved, and the service life of the vacuum collector pipe is prolonged.
Description
Technical field
The present invention relates to technical field of solar water heaters, particularly a kind of solar vacuum heat-collecting pipe production technology improving solar thermal utilization rate.
Background technology
In current solar energy heat utilization industry at home, be that the collecting system of photothermal deformation device is most widely used with all glass vacuum heat collection tube of solar energy, and the coating for selective absorption that the interior pipe of vacuum tube heat absorbing body adheres to is for absorbing incident solar radiant energy and converting it into heat energy.Vacuum heat collection pipe manufacturing enterprise in current domestic solar energy industry, in the production process of vacuum tube, the production technology of usual employing is to have plated after in coating for selective absorption, pipe and outer tube assemble oral area sealing-in, with exhaust equipment by being connected on tail pipe and the blast pipe of outer tube afterbody, mezzanine space between internal pipe and outer tube carries out vacuumizing and exhausting process, sealed-off is carried out to tail pipe, makes to form vacuum interlayer between inner and outer pipes, thus play insulation effect.The deficiency that prior art exists is: one is that outer glass tube has printing opacity effect, and have some light to produce refraction and scattering, spotlight effect is poor, and solar energy utilization ratio is low, can not make full use of luminous energy; Two is that mechanical strength is low, easily causes pipe explosion, reduction of service life when expanding with heat and contract with cold; Three is that layer vacuum is not high, and the use of evaporable air-absorbing agent adds use cost, maintains vacuum capacity poor, causes heat insulation effect to reduce.
Summary of the invention
The present invention seeks to provide a kind of solar vacuum heat-collecting pipe production technology improving solar thermal utilization rate to overcome the deficiencies in the prior art, can effectively improve vacuum heat collection pipe heat insulation effect, extending its service life.
The present invention is achieved through the following technical solutions:
A kind of solar vacuum heat-collecting pipe production technology, comprises the following steps:
(1) inner and outer pipes is shaping, and the thickness of tapered tube head is wanted evenly, and thickness reaches more than 1mm, and the aperture of blowing steam vent must not be greater than 7mm;
(2) clean, inject a water toward in the first tank, by 1:10000(V/V) proportioning preparation detergent solution, toward second, third tank in, fill deionized water, unlatching cleaning machine, cleans up one by one to inner and outer pipes;
(3) dry, it is 150 DEG C ± 10 DEG C that oven for drying temperature controls, and batch to enter, every batch time is 2 hours, to dry as principle;
(4) blasting treatment, carries out blasting treatment to inner tube outer surface, makes its surface roughness Ra between 13.5-2.2, adopts 250-320 object quartz sand, carries out blasting treatment with the speed of 2 cubic metres per minute to inner tube outer surface;
(5) plated film, the inner tube outer surface after blasting treatment carries out the spraying of coating for selective absorption;
(6) assemble, arranging having plated pipe in coating for selective absorption with the outer coaxial tube connecting tail pipe, by bracing frame, interior pipe blunt end being supported and fixed on bottom outer tube round end, bracing frame arranges getter;
(7) seal, fusion seal is carried out to the openend of pipe and outer tube in assembling, makes to form interlayer between it;
(8) be vented, carry out vacuumizing and exhausting process by outer tube tail pipe to interlayer, technological parameter is thermostat temperature 400-450 DEG C, constant temperature time 40-45 minute, and vacuum degree reaches 2 × 10
-2pa;
(9) high frequency, treats that vacuum tube temperature is down to less than 150 DEG C, vacuum 2 × 10
-2during more than Pa, the getter utilizing the high frequency coil of coreless induction furnace to aim at bottom vacuum tube carries out high-frequency heating, and after being heated to adsorbent rubescent rear 3-4 second, cooling getter, operates 2 times repeatedly;
(10) test package warehouse-in.
The invention has the beneficial effects as follows: by the application of above scheme, make the layer vacuum of vacuum tube higher, product hot property is better, can effectively improve solar thermal utilization rate, improves vacuum tube heat-insulating property, extends vacuum tube service life.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in more detail.
A kind of solar vacuum heat-collecting pipe production technology, comprises the following steps:
(1) inner and outer pipes is shaping, and the thickness of tapered tube head is wanted evenly, and thickness reaches more than 1mm, and the aperture of blowing steam vent must not be greater than 7mm;
(2) clean, inject a water toward in the first tank, by 1:10000(V/V) proportioning preparation detergent solution, toward second, third tank in, fill deionized water, unlatching cleaning machine, cleans up one by one to inner and outer pipes;
(3) dry, it is 150 DEG C ± 10 DEG C that oven for drying temperature controls, and batch to enter, every batch time is 2 hours, to dry as principle;
(4) blasting treatment, carries out blasting treatment to inner tube outer surface, makes its surface roughness Ra between 13.5-2.2, adopts 250-320 object quartz sand, carries out blasting treatment with the speed of 2 cubic metres per minute to inner tube outer surface;
(5) plated film, the inner tube outer surface after blasting treatment carries out the spraying of coating for selective absorption;
(6) assemble, arranging having plated pipe in coating for selective absorption with the outer coaxial tube connecting tail pipe, by bracing frame, interior pipe blunt end being supported and fixed on bottom outer tube round end, bracing frame arranges getter;
(7) seal, fusion seal is carried out to the openend of pipe and outer tube in assembling, makes to form interlayer between it;
(8) be vented, carry out vacuumizing and exhausting process by outer tube tail pipe to interlayer, technological parameter is thermostat temperature 400-450 DEG C, constant temperature time 40-45 minute, and vacuum degree reaches 2 × 10
-2pa;
(9) high frequency, treats that vacuum tube temperature is down to less than 150 DEG C, vacuum 2 × 10
-2during more than Pa, the getter utilizing the high frequency coil of coreless induction furnace to aim at bottom vacuum tube carries out high-frequency heating, and after being heated to adsorbent rubescent rear 3-4 second, cooling getter, operates 2 times repeatedly;
(10) test package warehouse-in.
In the production process of vacuum tube, to plate in coating for selective absorption after pipe assembles oral area sealing-in with outer tube, carry out vacuumizing and exhausting process by the tail pipe (blast pipe) being connected on outer tube afterbody to the mezzanine space between inner and outer pipes with exhaust equipment, vacuum degree reaches 2 × 10
-2pa.When vacuum tube vacuumizing/deairing step is through 450 DEG C of constant temperature after 45 minutes, layer vacuum is evacuated to 5 × 10 simultaneously
-2during more than Pa, and when the temperature of vacuum tube is down to below 150 DEG C, high-frequency heating is carried out with the getter that the high frequency coil of removable coreless induction furnace is aimed at bottom vacuum tube, when the getter ring of getter starts rubescent, can see that the reading of vacuum meter declines rapidly, when illustrating that getter ring is baked red, getter itself has a large amount of gas to release.Carry out getter degas operation time, when it should be noted that air-breathing ring is baked red by high frequency coil, now getter venting, after getter environment-development is red after 3 ~ 4 seconds, remove high frequency coil to cool by getter ring, then carry out second time dielectric drying, 3 times so repeatedly, the gas contained by getter itself can be got rid of substantially.
Invention increases sandblasting step, the unevenness had compared with Small Distance and small peak valley is defined at inner tube outer surface, which adds the microcosmic endotherm area of inner tube outer surface, simultaneously because coating for selective absorption is very thin, after surface application coating for selective absorption like this after blasting treatment, the surface of coating coating for selective absorption also will form the unevenness had compared with Small Distance and small peak valley, under same diameter and length situation, effectively can increase the endotherm area of solar energy vacuum tube, improve coating for selective absorption to the absorptivity of solar radiation, strengthen the thermal energy conversion rate of solar energy vacuum tube.
Solar vacuum heat-collecting pipe production technology of the present invention, makes the layer vacuum of vacuum tube higher, and product hot property is better, can effectively improve solar thermal utilization rate, improves vacuum tube heat-insulating property, extends vacuum tube service life.
Below be only embody rule example of the present invention, protection scope of the present invention is not constituted any limitation.The technical scheme that all employing equivalents or equivalence are replaced and formed, all drops within rights protection scope of the present invention.
Claims (1)
1. a solar vacuum heat-collecting pipe production technology, is characterized in that: comprise the following steps:
(1) inner and outer pipes is shaping, and the thickness of tapered tube head is wanted evenly, and thickness reaches more than 1mm, and the aperture of blowing steam vent must not be greater than 7mm;
(2) clean, inject a water toward in the first tank, by 1:10000(V/V) proportioning preparation detergent solution, toward second, third tank in, fill deionized water, unlatching cleaning machine, cleans up one by one to inner and outer pipes;
(3) dry, it is 150 DEG C ± 10 DEG C that oven for drying temperature controls, and batch to enter, every batch time is 2 hours, to dry as principle;
(4) blasting treatment, carries out blasting treatment to inner tube outer surface, makes its surface roughness Ra between 13.5-2.2, adopts 250-320 object quartz sand, carries out blasting treatment with the speed of 2 cubic metres per minute to inner tube outer surface;
(5) plated film, the inner tube outer surface after blasting treatment carries out the spraying of coating for selective absorption;
(6) assemble, arranging having plated pipe in coating for selective absorption with the outer coaxial tube connecting tail pipe, by bracing frame, interior pipe blunt end being supported and fixed on bottom outer tube round end, bracing frame arranges getter;
(7) seal, fusion seal is carried out to the openend of pipe and outer tube in assembling, makes to form interlayer between it;
(8) be vented, carry out vacuumizing and exhausting process by outer tube tail pipe to interlayer, technological parameter is thermostat temperature 400-450 DEG C, constant temperature time 40-45 minute, and vacuum degree reaches 2 × 10
-2pa;
(9) high frequency, treats that vacuum tube temperature is down to less than 150 DEG C, vacuum 2 × 10
-2during more than Pa, the getter utilizing the high frequency coil of coreless induction furnace to aim at bottom vacuum tube carries out high-frequency heating, and after being heated to adsorbent rubescent rear 3-4 second, cooling getter, operates 2 times repeatedly;
(10) test package warehouse-in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410703351.9A CN104456994A (en) | 2014-11-26 | 2014-11-26 | Production process of solar vacuum collector pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410703351.9A CN104456994A (en) | 2014-11-26 | 2014-11-26 | Production process of solar vacuum collector pipe |
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| Publication Number | Publication Date |
|---|---|
| CN104456994A true CN104456994A (en) | 2015-03-25 |
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ID=52903454
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410703351.9A Pending CN104456994A (en) | 2014-11-26 | 2014-11-26 | Production process of solar vacuum collector pipe |
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| CN (1) | CN104456994A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106123361A (en) * | 2016-06-24 | 2016-11-16 | 芜湖市万里达新能源有限公司 | A kind of solar vacuum heat-collecting pipe and production technology thereof |
| CN108017963A (en) * | 2017-12-07 | 2018-05-11 | 巨浪(苏州)热水器有限公司 | A kind of painting method of the thermal-collecting tube coating of solar water heater |
| CN108180644A (en) * | 2017-12-19 | 2018-06-19 | 海宁市华锋太阳能集热管有限公司 | A kind of processing method of solar energy heat collection pipe |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2392133Y (en) * | 1999-08-09 | 2000-08-16 | 郑慧敏 | Heat accumulation type full glass vacuum tube |
| 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 |
| CN101387445A (en) * | 2008-10-09 | 2009-03-18 | 姜振友 | High-efficiency vacuum glass thermal-collecting tube and fabrication technology thereof |
| CN102211881A (en) * | 2011-05-10 | 2011-10-12 | 浙江桑乐数字化太阳能有限公司 | Inner tube cleaning machine with drying function for all-glass vacuum solar collector tube |
| CN102838269A (en) * | 2012-08-07 | 2012-12-26 | 湖北桑夏太阳能产业有限公司 | Preparation process for evacuated solar collector tube |
| CN103115448A (en) * | 2013-03-07 | 2013-05-22 | 日出东方太阳能股份有限公司 | Full-glass solar vacuum heat-collecting tube and preparation method thereof |
-
2014
- 2014-11-26 CN CN201410703351.9A patent/CN104456994A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2392133Y (en) * | 1999-08-09 | 2000-08-16 | 郑慧敏 | Heat accumulation type full glass vacuum tube |
| 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 |
| CN101387445A (en) * | 2008-10-09 | 2009-03-18 | 姜振友 | High-efficiency vacuum glass thermal-collecting tube and fabrication technology thereof |
| CN102211881A (en) * | 2011-05-10 | 2011-10-12 | 浙江桑乐数字化太阳能有限公司 | Inner tube cleaning machine with drying function for all-glass vacuum solar collector tube |
| CN102838269A (en) * | 2012-08-07 | 2012-12-26 | 湖北桑夏太阳能产业有限公司 | Preparation process for evacuated solar collector tube |
| CN103115448A (en) * | 2013-03-07 | 2013-05-22 | 日出东方太阳能股份有限公司 | Full-glass solar vacuum heat-collecting tube and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106123361A (en) * | 2016-06-24 | 2016-11-16 | 芜湖市万里达新能源有限公司 | A kind of solar vacuum heat-collecting pipe and production technology thereof |
| CN108017963A (en) * | 2017-12-07 | 2018-05-11 | 巨浪(苏州)热水器有限公司 | A kind of painting method of the thermal-collecting tube coating of solar water heater |
| CN108180644A (en) * | 2017-12-19 | 2018-06-19 | 海宁市华锋太阳能集热管有限公司 | A kind of processing method of solar energy heat collection pipe |
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Application publication date: 20150325 |