CN204063653U - A kind of spiral interior pipe vacuum heat collection pipe being suitable for the large temperature difference - Google Patents
A kind of spiral interior pipe vacuum heat collection pipe being suitable for the large temperature difference Download PDFInfo
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- CN204063653U CN204063653U CN201420621840.5U CN201420621840U CN204063653U CN 204063653 U CN204063653 U CN 204063653U CN 201420621840 U CN201420621840 U CN 201420621840U CN 204063653 U CN204063653 U CN 204063653U
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- pipe
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- interior pipe
- outer tube
- heat collection
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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 kind of spiral interior pipe vacuum heat collection pipe being suitable for the large temperature difference, comprise outer tube, close described outer tube two ends and enclose the seal of vacuum space, be arranged on described outer tube and two ends pass the interior pipe of described seal, two ends be connected with described seal for support described in the stay pipe of pipe, described interior pipe comprises the spiral section being positioned at middle part and the straightway being positioned at two ends, described spiral section is coiled on described stay pipe, described straightway passes described seal, the position described straightway passing described seal is provided with the annular protrusion preventing its relatively described seal slippage.The utility model can make to keep good vacuum, low cost of manufacture, long working life between outer tube and spiral interior pipe under high temperature and large temperature difference condition, and the thermal efficiency is high, greatly can promote industrialization and the scale of solar energy heat collection pipe, and can promote environmental protection.
Description
Technical field
the utility model belongs to technical field of solar utilization technique, particularly relates to a kind of spiral interior pipe vacuum heat collection pipe being suitable for the large temperature difference.
Background technology
the energy is the important substance basis that the national economic development and living standards of the people improve, solar energy is cleanliness without any pollution and the never exhausted energy, it is more and more subject to the attention of the whole society, is one of regenerative resource with fastest developing speed, the emphasis that Ye Shi various countries competitively develop.At present, the device of known effective absorption solar thermal energy is solar vacuum heat-collecting pipe, developed multiple solar vacuum heat-collecting pipe now, its range of application covers the many aspects such as supply domestic hot water, industrial process heating, desalinization and solar energy thermal-power-generating.
trench light condensing system is moderate-high temperature heat utilization systems in current most widely used solar energy, and high temperature resistant solar vacuum heat-collecting pipe is the core component of trench light condensing system.The solar energy evacuated high-temperature heat-collection pipe that existing a kind of application is wider; comprise outer glass tube and collector metal pipe; space between outer glass tube and collector metal pipe is vacuum layer; the two ends of outer glass tube have metal coating block; the both wings port of collector metal pipe is through metal coating block; the both wings port of collector metal pipe is medium import and export, and the two ends of collector metal pipe are set with rare earth alloy sealing-in device, and the outer ring of rare earth alloy sealing-in device and the inwall of outer glass tube closely cooperate.Wherein, vacuum layer between outer glass tube and collector metal pipe is sealed by the solder side between sealing-in device and outer glass tube, because collector metal pipe can bear larger pressure, so the liquid medium such as water can pressure-bearing flowing in collector metal pipe, the diabatic process of the media such as collector metal Guan Yushui is that heat convection adds conduction heat exchange, and vacuum heat-preserving reduces heat loss to greatest extent, thus for all-glass vacuum tube, heat-collecting temperature improves greatly.But rare earth alloy sealing-in device and the outer glass tube at this vacuum heat collection pipe two ends need to coordinate closely, to maintain vacuum.Solder side shearing strength between sealing device and outer glass tube is not high, under the repeated action of the larger temperature difference of thermal-collecting tube, there is built-in distinction in the thermal coefficient of expansion of metal tube and glass tube, relative displacement difference is formed between two pipes, under higher temperature conditions or flexible number of times too much after, the shear stress that metal and glass tube cause due to modified difference will exceed the shearing strength of this solder side, rare earth alloy sealing-in device is caused easily to break, cause poorly sealed, vacuum failure, collecting efficiency significantly reduces.And adopt the glass metal vacuum tube of rare earth alloy sealing-in device, cost is very expensive, is unfavorable for that solar energy and traditional fossil energy carry out competition.
on the other hand, due to the restriction of structure itself, the fluid media (medium) of the metal tube mid portion of solar vacuum heat-collecting pipe is away from tube wall, heat transfer is slow, and the fluid media (medium) of close tube wall is close to tube wall, and heat absorption is fast, both Temperature Difference Ratios are comparatively large, and in fact collecting efficiency is high not enough.Also have in prior art and to adopt helix tube vacuum heat collection pipe, but in order to maintain the vacuum of thermal-collecting tube, a large amount of nonevaporable getter must be arranged, otherwise vacuum will lose efficacy very soon.And getter or be arranged in vacuum heat collection pipe two ends, or be arranged in some relatively less position of receiver radiation in vacuum heat collection pipe, such as getter is arranged in endothermic tube top or getter is arranged in endothermic tube bottom.No matter adopt which kind of arrangement in prior art, arrangement areas is still limited, and inconvenience is arranged in a large number; In any case the absorption of blocking and reducing solar radiation all can be formed.
Summary of the invention
the purpose of this utility model is to provide a kind of spiral interior pipe vacuum heat collection pipe being suitable for the large temperature difference.The weak points such as the resistance to temperature approach of its more existing high temperature solar vacuum heat collection pipe is low, service life is short, the thermal efficiency is inadequate, involve great expense, have that the resistance to temperature difference is large, long service life, the thermal efficiency are high, cost is low, significantly can improve the adaptive feature of solar thermal collection system.
for achieving the above object, the technical solution adopted in the utility model is:
a kind of spiral interior pipe vacuum heat collection pipe being suitable for the large temperature difference, comprise outer tube, close described outer tube two ends and enclose the seal of vacuum space, be arranged on described outer tube and two ends pass the interior pipe of described seal, two ends be connected with described seal for support described in the stay pipe of pipe, described interior pipe comprises the spiral section being positioned at middle part and the straightway being positioned at two ends, described spiral section is coiled on described stay pipe, described straightway passes described seal, the position described straightway passing described seal is provided with the annular protrusion preventing its relatively described seal slippage.
preferably, described vacuum heat collection pipe also comprises evaporable air-absorbing agent and nonevaporable getter, and described evaporable air-absorbing agent is arranged in described outer tube, and described nonevaporable getter is arranged in stay pipe on described spiral section or described.
further preferably, the inner side of described seal is connected with the getter fixture offering annular groove, and the notch direction of described annular groove is towards described seal side, and described evaporable air-absorbing agent is arranged in described annular groove;
or be provided with the chamber had from broken ring function in described outer tube, described evaporable air-absorbing agent is arranged in described chamber.
further preferably, be provided with bearing in described stay pipe, described nonevaporable getter is fixed on described bearing.
preferably, described outer tube, interior pipe, stay pipe and seal all adopt glass material, direct phase welding or sealed by sealing ring between described outer tube with seal; Direct phase welding or seal by glue or by sealing ring between described interior pipe with seal.
further preferably, have loudspeaker oral area on described seal, with described interior pipe phase weld, the wall thickness of described loudspeaker oral area is thinning gradually towards the direction away from described seal.
preferably, the diameter of described seal is less than the internal diameter of described outer tube, and described seal is inserted into a part in described outer tube.
preferably, described stay pipe offers pipe in allowing through notch part, the interior pipe through described notch part both sides is provided with for the ring-shaped clip of pipe in fixing described through notch part position.
preferably, between the end of described stay pipe and described seal, there is gap, between the end of described stay pipe and described seal, be also provided with insulation.
preferably, described seal is provided with the glass tube for the evacuate space enclosed described outer tube and seal.
the design concept of lower the application is below described:
in existing vacuum heat collection pipe, seal and the outer tube of one end mainly adopt welding manner to be connected, the other end then welds with metal inner pipe, because the materials variances of metal and glass is excessive, thus thermal expansion coefficient difference is larger, metal and glass are under the larger temperature difference, thermal coefficient of expansion missionary society causes the elongation of glass tube and metal tube inconsistent, the solder side shearing strength formed between the two is not high, relative deformation difference between metal inner pipe and outer tube is excessive, this solder side easily destroys, and causes outer tube and metal end enclosure to get loose.And pipe vacuum heat collection pipe in the spiral of the application, in it, pipe is coiled into helix tube, spiral interior pipe is before stretching out seal, the outer wall of interior pipe is provided with annular protrusion, interior tube swelling and when producing outside slippage under the high temperature conditions, protruding because contact closely with seal, under the reaction force of seal, projection is restricted, the slippage of interior pipe has been prevented from, make the shear stress that produces on the contact surface of interior pipe and seal little as far as possible thus, thus the stable of sealing-in can be maintained under very high serviceability temperature, vacuum in long-term holding tube.
vacuum heat collection pipe have employed spiral interior pipe, and it can make the heat exchange efficiency of fluid media (medium) improve further, and its screw-shaped flow paths can be beneficial to turbulization in fluid media (medium) flowing, also makes the heat exchange efficiency of fluid media (medium) greatly improve.
the spiral interior pipe of vacuum heat collection pipe is by being fixed on stay pipe, what in limiting, pipe easily produced due to coiling is sagging, this solar radiation that also can prevent beam condensing unit from converging some can not project on interior pipe, and from the top of hanging portion through.
vacuum heat collection pipe adopts stay pipe, is convenient to arrange nonevaporable getter in a large number, maintains vacuum permanently effective, nonevaporable getter is arranged in stay pipe inside, can not be formed and block, affect the absorption to solar radiation.
before the interior Guan Yu seal sealing by fusing of vacuum heat collection pipe, interior pipe inwardly slightly can be done to apply little compressive pre-stress (such as making whole helix tube shorten about 1mm) by pressing to it, when being under extreme environment cryogenic conditions, the position that interior Guan Yu seal can not be made due to the existence of compressive pre-stress to contact produces Relative sliding inwards, so, due to variations in temperature cause in pipe with seal between active force amplitude of variation greatly reduce, sealing between interior pipe and seal is greatly enhanced, significantly improve heat resisting temperature and the service life of vacuum heat collection pipe.
the spiral interior pipe of vacuum heat collection pipe adopts glass inner tube, and its material is consistent with outer glass tube, and both compatibilities are more excellent.The remarkable benefit of glass tube is used to be exactly that end socket is easy to use glass to make, may be used for operating temperature and reach about 400 DEG C, the operating mode of below operating pressure 10kg, be particularly useful for warm utilizing works and Seawater Desalination Project in major part, corrosion is not afraid of by pipeline, hydrogen can be hindered, be easy to maintain vacuum, long service life, cost significantly reduces thus.
the caliber of the interior pipe of vacuum heat collection pipe is generally at more than 8mm, and caliber is too small, and one is that pipe is oversize, and one is that pipeline easily blocks; But caliber excessive being also unfavorable for bends, and radius of curvature is too large.Use the benefit of glass tube to be exactly that locking device is easy to use glass to make, may be used for the operating mode that operating temperature is not high, pressure is little, can hydrogen be hindered, be easy to maintain vacuum, when special benefit is exactly for desalinization, be not afraid of corrosion, manufacturing cost significantly reduces simultaneously.
because technique scheme is used, the utility model compared with prior art has following advantages:
the utility model can make to keep good vacuum, low cost of manufacture, long working life between outer tube and spiral interior pipe under high temperature and large temperature difference condition, and the thermal efficiency is high, greatly can promote industrialization and the scale of solar energy heat collection pipe, and can promote environmental protection.
Accompanying drawing explanation
accompanying drawing 1 is fractionation schematic diagram of the present utility model;
accompanying drawing 2 is the sectional view of the utility model end;
accompanying drawing 3 is the profile of the utility model end.
wherein: 1, outer tube; 2, interior pipe; 20, spiral section; 21, straightway; 3, stay pipe; 30, notch part; 4, end socket; 40, loudspeaker oral area; 5, insulation; 6, getter fixture; 7, annular protrusion; 8, bearing; 9, nonevaporable getter; 10, evaporable air-absorbing agent.
Detailed description of the invention
below in conjunction with drawings and Examples, the utility model is further described:
a kind of spiral interior pipe vacuum heat collection pipe being suitable for the large temperature difference as shown in Figure 1, 2, 3, comprises outer tube 1, interior pipe 2, stay pipe 3 and seal.Wherein:
the material of outer tube 1 is any high transparency material, and have high permeability to the solar radiation of wavelength between 0.3-3 micron, the present embodiment is for outer glass tube.Its specification is external diameter: 105mm, wall thickness: 3mm.
interior pipe 2 adopts glass inner tube, and the outer tube wall of interior pipe 1 lays absorption film, and interior pipe 2 comprises interior pipe and comprises the spiral section 20 being positioned at middle part and the straightway 21 being positioned at two ends.Its specification external diameter: 12mm, wall thickness: 1.2mm, helical pitch: 13mm; Be responsible for long 1980mm, the external diameter of thread segment 20: 70mm; The helix pitch 1mm of spiral section 20.
stay pipe 3 adopts hollow heavy-walled glass pipe, stay pipe 3 offers notch part 30.Its specification external diameter: 46mm, wall thickness: 2.5mm.
seal is for end socket 4.According to the requirement of working environment, operational difference, end socket 4 adopt ductility good, be easy to processing, good springiness, the material of certain pressure, corrosion-resistant, antifatigue can be tolerated, heat-conductive characteristic is not good simultaneously, like this, can job requirement be met when vacuumizing inside end socket 4, can freely be out of shape again.For glass end socket in the present embodiment, the diameter of end socket 4 is slightly less than the internal diameter of outer tube 1.Certain end socket 4 also can adopt some metal manufacture, such as stainless steel, beryllium-bronze etc., and 0.05-2mm is thick, all can meet practice calls, reaches excellent working effect.
the annexation of above-mentioned parts is as follows: two end sockets 4 insert two ends that outer tube 1 seals outer tube 1, and enclose a vacuum space between outer tube 1, its two ends, inside that stay pipe 3 is arranged on outer tube 1 are connected with end socket 4, the spiral section 20 of interior pipe 2 is coiled on stay pipe 3, straightway 21 passes each 10mm of end socket 4, position straightway 21 passing end socket 4 is provided with annular protrusion 7, annular protrusion 7 is resisted against inside end socket 4, annular protrusion can 7 stop in the dilatancy of pipe 2 spiral section 20 when high temperature transmit to end socket 4, make interior pipe 2 when expanded by heating, Relative sliding can not be produced between the tube wall contacted with end socket 4 and end socket 4, the straightway 21 of interior pipe 2 can pass from the central axis of thermal-collecting tube, also can pass arbitrarily from the end socket 4 of thermal-collecting tube end.
the spiral section 20 of interior pipe 1 and the junction of straightway 21 through notch part 30, and the interior pipe 1 of notch part 30 both sides all arrange ring-shaped clip, and interior pipe 2 is fixed with notch part 30 position of stay pipe 2.
the spiral section 20 of pipe 2 in mild compression during installation, it is made to produce certain elastic force, make interior pipe 2 can hold out against end socket 4 under normal temperature state on the one hand, pipe 2 under limit cryogenic conditions can be compensated on the other hand inside contract and bring reciprocal Relative sliding and the active force that produces, prevent easy disengagement between interior pipe 2 and end socket 4.
vacuum heat collection pipe also comprises evaporable air-absorbing agent 10 and nonevaporable getter 9.Wherein:
evaporable air-absorbing agent arranges 9 in outer tube 1, but reception solar radiation can not be affected, such as, the position of outer tube 1 end is suitable for arranging evaporable air-absorbing agent 10, namely the inner side of end socket 4 is connected with the getter fixture 6 offering annular groove, with elastic clipping strip on getter fixture 6, can be fastened in end socket 4, the notch direction of annular groove is towards end socket 4 side, and evaporable air-absorbing agent 10 is arranged in annular groove; Or be provided with the chamber had from broken ring function in outer tube 1, evaporable air-absorbing agent 10 is arranged in chamber.
it is inner that nonevaporable getter 9 can be arranged on stay pipe 3, and such as in stay pipe 3, arrange bearing 8, nonevaporable getter 9 is fixed on bearing 8, or is arranged on directly over spiral section 20, and keeps at a certain distance away with outer tube 1.Substantially the solar radiation after convergence is not received inside stay pipe 3, also a small amount of solar radiation is only accepted directly over spiral section 20, be influenced by heat less at these two local layout nonevaporable getters 9 to interior pipe 2, particularly nonevaporable getter 9 is arranged in stay pipe 3, in any case can not reduce the absorption to solar radiation.
end socket 4 freezes the glass tube of an about 8 ~ 14mm of diameter, and thickness is greater than 1mm, for the evacuate space formed outer tube 1 and end socket 4.
all leave gap between the two ends of stay pipe 3 and end socket 4 as expansion joint, stay pipe 3 along the axial free-extension of thermal-collecting tube, can prevent hot conditions lower support pipe 3 from expanding and withstands end socket 4 and produce destruction.While keeping certain gap between stay pipe 3 and end socket 4, insulation 5 can also be set, strengthen the resistance of heat transfer between stay pipe 3 and end socket 4, insulation 5 is the high-temperature resistant thermal insulating material that one deck is very thin, as high temperature resistant packing ring, ability 450 DEG C, insulation 5 can prevent high temperature, also can prevent the shock repeatedly in transportation between stay pipe 3 and end socket 4 and cracked.
be both direct phase welding between the outer tube 1 of glass with end socket 4, such as thick high-boron-silicon glass, carries out the rear directly contact portion between outer tube 1 and end socket 4 fusing and sticks together, then reduce residual stress by annealing, can sealing be save like this, more conveniently to save time.If do not adopt the mode of sealing by fusing, the soft washer of ability 200 DEG C-400 DEG C can be furnished with according to product purpose difference, for the micro gap that shutoff outer tube 1 produces with the blemish of end socket 4, packing ring can adopt silicon rubber, fluorubber, but is not limited to this bi-material.
be both direct phase welding between glass inner tube 2 with end socket 4, end socket 4 has loudspeaker oral area 40 with interior pipe 2 phase weld, the wall thickness of loudspeaker oral area 40 is thinning gradually towards the direction away from end socket 4, because the wall thickness of glass inner tube 2 is very thin, thinning good welding afterwards gradually, if loudspeaker oral area 40 wall thickness and glass inner tube 2 Wall-Thickness Difference are apart from excessive, meeting bombing during welding; Smear between interior pipe 2 and end socket 4 or by high-temperature plastic or the mode sealing-in of sealing ring, or adopt the combination of these methods, improve the reliability of sealing, such as, adopt the sealing means of elastic seal ring assembling.
during assembling: first interior pipe 2, stay pipe 3 and end socket 4 are assembled together, then pipe 2 and the first welding of end socket 4 good, then outer tube 1 outside end socket 4 overall overlap enter after, then by end socket 4 and outer tube 1 welding.So doing is because in welding when pipe 2 and end socket 4, need to support spiral section 20, if inner and outer pipe 1,2 assembles welding simultaneously, supports with regard to bad.
the spiral interior pipe vacuum heat collection pipe being suitable for the large temperature difference of the present invention detects through actual performance, and its vacuum and holding time is improved significantly, and for glass inner tube, every mitron length can arrange the inspiratory capacity 800-2000 handkerchief liter of getter; The tolerance 400K temperature difference is repeatedly expanded with heat and contract with cold and is not less than 4000 times and keeps vacuum at below 5 × 10-3 Pa; Vacuum tube heat waste is reduced, 400 degrees Celsius of lower heat wastes not higher than 240W/m, at 350 degrees Celsius not higher than 150W/m; DLR opposing optical efficiency is not less than 0.98.All technical meets standard test requirements, is much better than other vacuum heat collection pipe in prior art.In addition, when interior pipe adopts metallic coil, every mitron length can arrange the inspiratory capacity 8000-20000 handkerchief liter of getter;
spiral interior pipe vacuum heat collection pipe in the present embodiment is suitable for connecting into thermal-collecting tube group.
above-described embodiment, only for technical conceive of the present utility model and feature are described, its object is to person skilled in the art can be understood content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalences done according to the utility model Spirit Essence change or modify, and all should be encompassed within protection domain of the present utility model.
Claims (10)
1. one kind is suitable for the spiral interior pipe vacuum heat collection pipe of the large temperature difference, comprise outer tube, close described outer tube two ends and enclose the seal of vacuum space, be arranged on described outer tube and two ends pass the interior pipe of described seal, two ends be connected with described seal for support described in the stay pipe of pipe, described interior pipe comprises the spiral section being positioned at middle part and the straightway being positioned at two ends, described spiral section is coiled on described stay pipe, described straightway passes described seal, it is characterized in that: the position described straightway passing described seal is provided with the annular protrusion preventing its relatively described seal slippage.
2. the spiral interior pipe vacuum heat collection pipe being suitable for the large temperature difference according to claim 1, it is characterized in that: described vacuum heat collection pipe also comprises evaporable air-absorbing agent and nonevaporable getter, described evaporable air-absorbing agent is arranged in described outer tube, and described nonevaporable getter is arranged in stay pipe on described spiral section or described.
3. the spiral interior pipe vacuum heat collection pipe being suitable for the large temperature difference according to claim 2, it is characterized in that: the inner side of described seal is connected with the getter fixture offering annular groove, the notch direction of described annular groove is towards described seal side, and described evaporable air-absorbing agent is arranged in described annular groove;
Or be provided with the chamber had from broken ring function in described outer tube, described evaporable air-absorbing agent is arranged in described chamber.
4. the spiral interior pipe vacuum heat collection pipe being suitable for the large temperature difference according to claim 2, it is characterized in that: be provided with bearing in described stay pipe, described nonevaporable getter is fixed on described bearing.
5. the spiral interior pipe vacuum heat collection pipe being suitable for the large temperature difference according to claim 1, it is characterized in that: described outer tube, interior pipe, stay pipe and seal all adopt glass material, direct phase welding or sealed by sealing ring between described outer tube with seal; Direct phase welding or seal by glue or by sealing ring between described interior pipe with seal.
6. the spiral interior pipe vacuum heat collection pipe being suitable for the large temperature difference according to claim 5, it is characterized in that: have loudspeaker oral area on described seal, with described interior pipe phase weld, the wall thickness of described loudspeaker oral area is thinning gradually towards the direction away from described seal.
7. be suitable for the spiral interior pipe vacuum heat collection pipe of the large temperature difference according to claim 1 or 5, it is characterized in that: the diameter of described seal is less than the internal diameter of described outer tube, described seal is inserted into a part in described outer tube.
8. the spiral interior pipe vacuum heat collection pipe being suitable for the large temperature difference according to claim 1, it is characterized in that: described stay pipe offers pipe in allowing through notch part, the interior pipe through described notch part both sides is provided with for the ring-shaped clip of pipe in fixing described through notch part position.
9. the spiral interior pipe vacuum heat collection pipe being suitable for the large temperature difference according to claim 1, it is characterized in that: between the end of described stay pipe and described seal, there is gap, between the end of described stay pipe and described seal, be also provided with insulation.
10. the spiral interior pipe vacuum heat collection pipe being suitable for the large temperature difference according to claim 1, is characterized in that: described seal is provided with the glass tube for the evacuate space enclosed described outer tube and seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420621840.5U CN204063653U (en) | 2014-10-24 | 2014-10-24 | A kind of spiral interior pipe vacuum heat collection pipe being suitable for the large temperature difference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201420621840.5U CN204063653U (en) | 2014-10-24 | 2014-10-24 | A kind of spiral interior pipe vacuum heat collection pipe being suitable for the large temperature difference |
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| CN204063653U true CN204063653U (en) | 2014-12-31 |
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| CN201420621840.5U Expired - Fee Related CN204063653U (en) | 2014-10-24 | 2014-10-24 | A kind of spiral interior pipe vacuum heat collection pipe being suitable for the large temperature difference |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279777A (en) * | 2014-10-24 | 2015-01-14 | 张家港玉成精机股份有限公司 | Spiral inner-tube vacuum heat collecting tube suitable for large temperature difference |
| CN108662793A (en) * | 2018-05-08 | 2018-10-16 | 哈尔滨锅炉厂有限责任公司 | Coil pipe thermal-collecting tube and its heat collecting method for slot type photo-thermal power generation heat collector |
-
2014
- 2014-10-24 CN CN201420621840.5U patent/CN204063653U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279777A (en) * | 2014-10-24 | 2015-01-14 | 张家港玉成精机股份有限公司 | Spiral inner-tube vacuum heat collecting tube suitable for large temperature difference |
| CN108662793A (en) * | 2018-05-08 | 2018-10-16 | 哈尔滨锅炉厂有限责任公司 | Coil pipe thermal-collecting tube and its heat collecting method for slot type photo-thermal power generation heat collector |
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Granted publication date: 20141231 Termination date: 20181024 |
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