CN201122006Y - Line focus solar vacuum heat-collecting tube sealing structure and discharging mechanism - Google Patents
Line focus solar vacuum heat-collecting tube sealing structure and discharging mechanism Download PDFInfo
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- CN201122006Y CN201122006Y CNU2007201439755U CN200720143975U CN201122006Y CN 201122006 Y CN201122006 Y CN 201122006Y CN U2007201439755 U CNU2007201439755 U CN U2007201439755U CN 200720143975 U CN200720143975 U CN 200720143975U CN 201122006 Y CN201122006 Y CN 201122006Y
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- 230000007246 mechanism Effects 0.000 title claims description 46
- 238000007789 sealing Methods 0.000 title claims description 39
- 238000007599 discharging Methods 0.000 title 1
- 229910052751 metal Inorganic materials 0.000 claims abstract description 74
- 239000002184 metal Substances 0.000 claims abstract description 74
- 239000011521 glass Substances 0.000 claims abstract description 60
- 238000003466 welding Methods 0.000 claims abstract description 40
- 239000000956 alloy Substances 0.000 claims abstract description 34
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 33
- 229910000833 kovar Inorganic materials 0.000 claims abstract description 32
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 22
- 239000003566 sealing material Substances 0.000 claims abstract description 16
- 238000009413 insulation Methods 0.000 claims abstract description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 18
- 238000005516 engineering process Methods 0.000 claims description 17
- 229910052786 argon Inorganic materials 0.000 claims description 13
- 238000004080 punching Methods 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000013081 microcrystal Substances 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 230000005496 eutectics Effects 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 238000004021 metal welding Methods 0.000 claims description 3
- 230000035939 shock Effects 0.000 claims description 3
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 2
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 claims description 2
- KGWWEXORQXHJJQ-UHFFFAOYSA-N [Fe].[Co].[Ni] Chemical compound [Fe].[Co].[Ni] KGWWEXORQXHJJQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000006096 absorbing agent Substances 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000005388 borosilicate glass Substances 0.000 claims description 2
- 239000010962 carbon steel Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 239000005321 cobalt glass Substances 0.000 claims description 2
- 230000000295 complement effect Effects 0.000 claims description 2
- 238000005553 drilling Methods 0.000 claims description 2
- 238000004544 sputter deposition Methods 0.000 claims description 2
- 239000011159 matrix material Substances 0.000 claims 1
- 238000004378 air conditioning Methods 0.000 abstract description 4
- 238000010612 desalination reaction Methods 0.000 abstract description 3
- 238000005057 refrigeration Methods 0.000 abstract description 3
- 239000013535 sea water Substances 0.000 abstract description 3
- 238000004826 seaming Methods 0.000 abstract 4
- 238000010248 power generation Methods 0.000 abstract 1
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- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 241000233855 Orchidaceae Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
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- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000005297 pyrex Substances 0.000 description 1
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- 239000010703 silicon Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/40—Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors
- F24S10/45—Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors the enclosure being cylindrical
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S20/00—Solar heat collectors specially adapted for particular uses or environments
- F24S20/20—Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S40/00—Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
- F24S40/40—Preventing corrosion; Protecting against dirt or contamination
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S40/00—Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
- F24S40/40—Preventing corrosion; Protecting against dirt or contamination
- F24S40/46—Maintaining vacuum, e.g. by using getters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S40/00—Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
- F24S40/80—Accommodating differential expansion of solar collector elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S25/00—Arrangement of stationary mountings or supports for solar heat collector modules
- F24S25/60—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules
- F24S2025/6012—Joining different materials
- F24S2025/6013—Joining glass with non-glass elements
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/138—Water desalination using renewable energy
- Y02A20/142—Solar thermal; Photovoltaics
-
- 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
- Y02E10/44—Heat exchange systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Joints Allowing Movement (AREA)
Abstract
The utility model relates to a seaming structure and an unloading device used in a line-focus solar vacuum heat collecting tube. The seaming structure and the unloading device consist of a glass outer tube, a metal inner tube, a metal end cover, iron-nickel Kovar alloy pieces, an unloading bellow, glass sealing material, pipe-joint pieces, welding procedure rings and metal heat-insulation procedure rings. The seaming structure and the unloading device are characterized in that the unloading bellow is arranged in the glass outer tube of the line-focus solar vacuum heat collecting tube. The line-focus solar vacuum heat collecting tube made by adopting the seaming structure and the unloading device can be widely used in groove-type solar thermal power generation, solar air-conditioning refrigeration, solar desalination of sea water, and other solar medium-high temperature heat collecting devices.
Description
Technical field
The utility model relates to a kind of sealing structure and discharge mechanism that is used for the groove type line-focusing metal flow passage solar vacuum heat-collecting tube, belongs to the solar energy utilization technique field.
Background technology
Line focusing solar collector tube is the main heat collecting element in the Solar Energy Heat Utilization System such as solar energy thermal-power-generating, solar airconditioning refrigeration, solar seawater desalination.The line-focusing solar heat collecting element proposes relative higher requirement owing to the restriction that is subjected to working medium temperature height and metal inner pipe thermal expansion, glass-to-metal sealing technology to project organization and manufacturing process.Through improved metal flow passage solar vacuum heat-collecting tube ZL200420091975.1 with inside and outside offloading functions, the ZL200620113317.7 patent, emphasis has solved the problem of metal inner pipe thermal expansion to structure influence, through producing proof, homogeneous tube is simple in structure, be suitable for suitability for industrialized production, this line-focusing solar energy vacuum heat-collecting pipe is used in the solar airconditioning refrigerating plant.
At present, the patented technology of domestic relevant metal straight pipe is a lot, the main distinction is on architectural difference, technical scheme has the consistent tendency of trend, the patent that has then attempts to adopt bonding mode to avoid the difficult problem of sealing-in and unloading structure and processing, to the research and the Study on Processing Technology of material property and obvious gap is abroad arranged.Line-focusing solar energy vacuum heat-collecting pipe relates to multi-disciplinary high-tech product, its material relates to a lot of industries, the performance indications of material more are subjected to the restriction of domestic technique development level and present situation, therefore, when selecting reasonable structure, should select the material and the performance indications of domestic maturation as far as possible, or original material is proposed new requirement, could real through engineering approaches and the industrialization that realizes line focusing solar collector tube.
I find at case making with in using, the sealing structure of thermal-collecting tube and discharge mechanism are very crucial on material is selected, for further improving stability and reliability, in through engineering approaches and industrialization, new breakthrough is arranged, shorten the gap with external like product as far as possible, must be on above-mentioned patent basis the sealing structure of line-focusing solar energy vacuum heat-collecting pipe and discharge mechanism and material be carried out reasonable disposition.Material through improved sealing structure and discharge mechanism and configuration is applicable to other various built-in metal flow passage solar vacuum heat-collecting tubes and heat pipe solar vacuum heat-collecting pipe.
Summary of the invention
Technical problem to be solved in the utility model is to improve the stability and the reliability of line focusing solar vacuum heat-collecting tube sealing structure and discharge mechanism, and the multiple material that provides a kind of energy to be fit to line focusing solar vacuum heat-collecting tube sealing structure and discharge mechanism is selected and structure.
The alleged problem of the utility model is solved by following technical scheme:
Be made up of glass outer tube, metal inner pipe, iron nickel kovar alloy spare, metal end, unloading bellows, glass sealing material, pipe connecting piece, welding procedure ring, metallic insulation technology ring through improved line focusing solar vacuum heat-collecting tube sealing structure and discharge mechanism, it is characterized in that: the discharge mechanism bellows is arranged in the glass outer tube of line-focusing solar energy vacuum heat-collecting pipe; The punch forming of iron nickel kovar alloy spare is the tube-like piece of head dribbling type convex body or band groove, and iron nickel kovar alloy spare passes through the direct welding of melt process with the glass outer tube; Iron-nickel alloy can cut down the ring port and the welding of metal end outer argon arc of part, metal end and the welding of unloading bellows argon arc, the unloading bellows other end and the welding of pipe connecting piece argon arc, the welding of pipe connecting piece and metal inner pipe argon arc, metal inner pipe outer surface vacuum sputtering is high temperature resistant selective thermal absorber coatings.
Another technical scheme is indirectly iron nickel kovar alloy spare and glass outer tube sealing by fusing to be connect by the glass sealing material, or connects by metallic lead, aluminium press seal; Other element structures and connected mode are the same.
Described glass outer tube selects linear expansion coefficient in (40-60) * 10
-7/ ℃ between in hard, high transmission rate, shock resistance and have the borosilicate glass tube of high-fire resistance, light transmittance is greater than 90%.This is the key that the technical program is implemented.The high-boron-silicon glass of current application on solar vacuum heat-collecting pipe is to produce at the specific (special) requirements in fields such as chemical industry originally, also claims send Simon Rex glass, has outstanding features such as high temperature resistant, acid and alkali-resistance, shock resistance, but owing to linear expansion coefficient is 33 * 10
-7/ ℃, the coefficient of expansion is very little, therefore when directly sealing by fusing connects, the metal material that selection matches just is difficult to, no matter taking direct sealing by fusing still is that indirect sealing by fusing connects, and all may cause the reflection of expansion residual stress because of there is big-difference in both linear expansion coefficients, and the selection of domestic on the other hand kovar alloy material or glass sealing material is difficult to and high hard silicon boron glass coupling, therefore, improve silicon boron glass linear expansion coefficient and just become a kind of very selection of reality.Obviously, under the situation that satisfies the line-focusing solar energy vacuum heat-collecting pipe specification requirement, this selection has reasonability, although the Pyrex of this coefficient of expansion are not still produced at present and are used, but appropriate change factory formula and technology, this glass outer tube are easy to realize and accomplish under the prior art condition.
Described metal end is meant the metal end that stainless steel material is made, and the metal end punching press is made into the spill end cap of center drilling, wall thickness 0.4-1mm, and unloading bellows, the metal inner pipe with the thermal-collecting tube two ends welds respectively.
Different convex ring or the broadening formation pipe fittings of circle in the punching press of described iron nickel kovar alloy spare is made into, linear expansion coefficient should be consistent with the glass outer tube, is (40-60) * 10
-7/ ℃, this is to connect the technology preparation of being done in order to carry out indirect sealing by fusing, and more 4J42,4J45 etc. are for example used in the fine selection of domestic this material at present in heat pipe solar vacuum heat-collecting pipe, and linear expansion coefficient is (40-75) * 10 in the time of 20-450 ℃
-7/ ℃, other is (46-55) * 10 as iron nickel cobalt glass sealing alloy 4J29,4J44
-7/ ℃.Iron nickel kovar alloy spare wall thickness should approach, and the favourable stress difference that slackens is advisable to select 0.3-1mm.
Described iron nickel kovar alloy ring also should be consistent with the above two with the linear expansion coefficient of the eutectic microcrystal glass sealing material of the indirect sealing-in of glass outer tube.The coefficient of expansion is (40-60) * 10 in 25～300 ℃ of intervals
-7/ ℃, the domestic coefficient of expansion of can having produced is in (50-60) * 10 at present
-7/ ℃, softening simultaneously and wandering temperature just easily become the low-melting-point glass sealing-in material of glass in the time of≤500 ℃, for example devitrified glasses such as 305,308.Because the composition of traditional glass-to-metal sealing material is not suitable for environmental requirement mostly based on lead oxide, therefore developing lead-free low-melting microcrystal glass sealing material just becomes key problem in technology.The coefficient of expansion of glass sealing material is low more, softening corresponding with wandering temperature high more, softening and wandering temperature is high more then to be difficult for and glass outer tube coupling, that have even be higher than the softening temperature of glass outer tube, bring difficulty for processing and destressing, also cause casual gas leak phenomenon easily, also influence sealing strength and vacuum simultaneously, so selection is softening and the lead-free low-melting devitrified glass of wandering temperature between 300-800 ℃ is rational.
Described discharge mechanism bellows is actual to be small-sized expansion joint, owing to there is not angle torsion, therefore axial rigidity just becomes the important indicator of selecting the discharge mechanism bellows, since the discharge mechanism bellows be mounted in glass outer tube sealing-in metal end on, the ability of its carrying axial thrust is directly relevant with glass-to-metal sealing intensity, therefore the excessive axial thrust that makes easily of bellows axial rigidity concentrates on glass-to-metal sealing place, cause sealing-in point cracking, influence the vacuum of thermal-collecting tube, cross low then poor stability, therefore bellows list ripple axial rigidity should be according to the difference of inside nominal diameter, be chosen in the 20-100Kg/mm that glass-to-metal sealing intensity can carry, the compensating axial rigidity of 5-20 ripple should be at 0.5-20Kg/mm.
Described each node of discharge mechanism bellows has the absorption function of 1-2mm at least, and the node number is at least at the 2-20 ripple, and the node number is very few can not to satisfy metal inner pipe expansion absorption amount, crosses and reduces active set heat pipe pipe range at most.
Described discharge mechanism bellows is different from common bellows, because it is operated under the vacuum condition, therefore requiring the slip under 120 ℃ of conditions of operating mode is 1.33 * 10
-10Pa.m
3/ sec.
The anti-fatigue life of described discharge mechanism bellows should should be able to satisfy the requirement of operate as normal more than 10 years greater than 30,000 times.
The stainless steel material that described discharge mechanism bellows is selected is mainly SUS304,321 or SUS316L; the bellows wall thickness is 0.2-0.3mm; the argon shield welded pipe by moulding, beat ripple, annealing heat treatment can meet the demands; behind the welded pipe fitting, promptly finished the making of discharge mechanism bellows; also can reserve straight section and adopt the welding of standard welding procedure, shown in Fig. 5,9,10,12.
Described discharge mechanism bellows inside nominal diameter should be selected according to selected metal inner pipe inside nominal diameter, should be 40,45,50,60,65 in standard, select among the 80mm; Crest height of wave 5-8mm, pitch of waves 3-12mm.The wave height of bellows and latus rectum are directly related with the axial rigidity index, and the high more axial rigidity of crest is more little, therefore should take into account the axial rigidity requirement when selecting the wave height of metal inner pipe caliber and bellows.
Described pipe connecting piece is the plate-like piece of central bore flange, and endoporus and metal inner pipe are complementary, turn-up portion and metal inner pipe welding, and planar section end and discharge mechanism bellows directly weld, and material is stainless steel or carbon steel.Pipe connecting piece also can be made into an end reducing and the tube-like piece of other end enlarging; flared end and corrugated tube end welding; the other end is sleeved on the metal inner pipe, and with the metal inner pipe welding, pipe connecting piece just can play the effect of protection and interior pipe of stable metal and bellows simultaneously like this outside pipe.As Fig. 2, shown in Figure 11.
The inside nominal diameter of described metal inner pipe should be selected according to the optically focused ratio of working medium flow and line focus device, and latus rectum is between 25-60mm, and wall thickness is between 0.3-3mm, and nominal pressure can satisfy systems technology and safe bearing requirements between 0.6-25MPa.Owing to when selecting metal inner pipe, largely will consider heat transfer property, therefore between pipe wall thickness, working medium flow and bearing pressure, want appropriate balance.
Described metal inner pipe is axially to become wavy bellows tube, be widely used in the pipe heat exchanger, because bellows tube self has a small amount of absorption function, the axial thrust that the high temperature expansion produces is little than metal straight pipe, because the hyperbolic metal surface has changed the photo-thermal absorption mechanism, be optimal selection therefore again.The crest height of wave 2-5mm of bellows tube, pitch of waves 10-30mm.The big convection cell disturbance of node is big, thereby the resistance that forms is also big.
By the above as seen, the sealing structure of line-focusing solar energy vacuum heat-collecting pipe and discharge mechanism are an integral body that is closely related, and must make overall plans.
This utility model can be the straight-through flow passage solar vacuum heat-collecting tube of various metals and uses, metal flow passage solar vacuum heat-collecting tube so that this sealing structure and discharge mechanism are made can be widely used in group's heat supply, solar airconditioning refrigeration, solar seawater desalination, general industry heat supply etc. and utilize the solar industry of line focus device with in the hot equipment.
Description of drawings
Fig. 1, Fig. 5 are the direct sealing by fusing access node of the utility model structure schematic diagrames
Fig. 2, Figure 11 are the utility model pipe connecting piece schematic diagrames
Fig. 3, Fig. 4, Fig. 7, Fig. 8 are that the utility model iron nickel can cut down the part structural representation
Fig. 6, Fig. 9, Figure 10, Figure 12 are the indirect sealing structure schematic diagrames of the utility model
Wherein: 1 glass outer tube, 2 metal inner pipes, 3 metal ends, 4 iron nickel kovar alloy spares, 5 unloading bellowss, 6 glass sealing material, 7 pipe connecting pieces, 8 welding procedure rings, 9 metallic insulation technology rings
The specific embodiment
Embodiment one: direct sealing by fusing mode
Select the iron nickel kovar alloy and the glass outer tube of linear expansion coefficient unanimity, it at first is the tube-like piece of head spheroiding or band groove with 4 punch formings of iron nickel kovar alloy spare, after handling, atomizing is placed in anchor clamps or the die cavity, glass outer tube 1 end is sleeved on the kovar alloy spare 4 ball-type tubes of exposure, on glass work lathe or rotary table, use flame scorification glass, also can adopt the method for static sealing by fusing in die cavity, after treating iron nickel kovar alloy 4 and the 1 abundant welding of glass outer tube, press the heat treatment of glass operational procedure, standby as assembly after annealing, destressing.Metal end 3 punching presses are made into the perforate end cap of center spill, discharge mechanism bellows 4 two ends welded pipe fittings 7, metal end 3 and pipe connecting piece 7 that is connected discharge mechanism bellows 5 and the welding of metallic insulation technology ring 9 argon arcs, connect pipe connecting piece 7 other ends and metal inner pipe 2 welding of discharge mechanism bellows 5, when the assembling homogeneous tube, with the metal inner pipe 2 and the welding of iron nickel kovar alloy spare 4 argon arcs of band discharge mechanism, assemble the vacuum in exhaust guarantees afterwards that finishes.Shown in Fig. 1,5.
Embodiment two: indirect sealing-in mode
Select iron nickel kovar alloy 4, eutectic microcrystal glass sealing material 6 and the glass outer tube 1 of linear expansion coefficient unanimity, the different convex ring of circle in 4 punching presses of iron nickel kovar alloy spare are made into, the same form glass method orchid that is slightly larger than iron nickel kovar alloy spare 4 is processed in outer 1 end of glass tube, eutectic microcrystal glass sealing material 6 evenly is coated in after being in harmonious proportion on the sealing surface of iron nickel kovar alloy spare 4 after the atomizing and glass outer tube 1, opening upwards is placed on welding in the high temperature furnace, fully press after the welding heat treatment of glass operational procedure through anneal, standby as assembly after the destressing.Metal end 3 punching presses are made into the perforate end cap of center spill, discharge mechanism bellows 4 two ends welded pipe fittings 7, metal end 3 and pipe connecting piece 7 that is connected discharge mechanism bellows 5 and the welding of metallic insulation technology ring 9 argon arcs, connect pipe connecting piece 7 other ends and metal inner pipe 2 welding of discharge mechanism bellows 5, when the assembling homogeneous tube, with the metal inner pipe 2 and the welding of iron nickel kovar alloy spare 4 argon arcs of band discharge mechanism, assemble the vacuum in exhaust guarantees afterwards that finishes.Shown in Fig. 6,12.Or continue to use metallic lead, the aluminium press seal connects mode.As shown in figure 10.
Embodiment three:
Glass flange processing mode in adopting, at first the glass-cutting outer tube 1, sealing surface in glass outer tube 1 end processes the inside horn mouth flange of opening, the end enlarging that iron nickel kovar alloy spare 4 is processed into form becomes bell-mouthed tube-like piece, iron nickel kovar alloy spare 4 after atomizing and the middle glass sealing material 6, welding in the static state high-temperature environment placed respectively of glass flange contact facings.Because therefore iron nickel kovar alloy spare 4 devices can carry the bigger axial stress that forms from the metal inner pipe thermal expansion in glass outer tube 1 flange, more help stablizing unloading structure.Other is the same.As shown in Figure 9.
Embodiment four:
More than all sealing-ins and unloading structure and manufacture craft, all be in the meticulous selection that is based upon material therefor, when reducing glass outer tube hardness and improving linear expansion coefficient, provide very big facility for making the line-focusing solar energy vacuum heat-collecting pipe that is fit to worst hot case, and the associated materials that is adopted all can freely be selected to use at home, process equipment and manufacturing technology all can be utilized existing mature technology, and this just lays a good foundation for we catch up with and surpass external advanced level and industrialization and reduce cost.
Claims (9)
1. line focusing solar vacuum heat-collecting tube sealing structure and discharge mechanism are made up of glass outer tube, metal inner pipe, metal end, iron nickel kovar alloy spare, unloading bellows, glass sealing material, pipe connecting piece, welding procedure ring, metallic insulation technology ring, and it is characterized in that: the discharge mechanism bellows is arranged in the glass outer tube of line-focusing solar energy vacuum heat-collecting pipe; The punch forming of iron nickel kovar alloy spare is the tube-like piece of head dribbling type convex body or band groove, and iron nickel kovar alloy spare passes through the direct welding of melt process with the glass outer tube; Iron nickel kovar alloy spare and glass outer tube are by the indirect sealing by fusing of glass sealing material or by metallic lead, aluminium sealing-in; Iron-nickel alloy can cut down the ring port and the welding of metal end outer argon arc of part, metal end and the welding of unloading bellows argon arc, the unloading bellows other end and the welding of pipe connecting piece argon arc, pipe connecting piece and the welding of metal inner pipe argon arc, the suitable enlarging in pipe connecting piece end connects with unloading bellows and welding procedure boxing, the pipe connecting piece other end is through reducing and metal inner pipe welding, and the unloading bellows other end and metal end, the boxing of metallic insulation technology connect.
2. line focusing solar vacuum heat-collecting tube sealing structure according to claim 1 and discharge mechanism is characterized in that: described glass outer tube is that linear expansion coefficient is in (40-60) * 10
-7/ ℃ between in hard, high transmission rate, shock resistance and have the borosilicate glass tube of high-fire resistance.
3. line focusing solar vacuum heat-collecting tube sealing structure according to claim 1 and discharge mechanism, it is characterized in that: described metal end is the stainless steel matrix end cap of center drilling, wall thickness 0.5-1mm, unloading bellows, metal inner pipe, the iron nickel kovar alloy spare with the thermal-collecting tube two ends welds respectively.
4. line focusing solar vacuum heat-collecting tube sealing structure according to claim 1 and discharge mechanism is characterized in that: described iron nickel kovar alloy spare is different convex ring or the broadening formation pipe fittings of circle in punching press is made into; Linear expansion coefficient is consistent with the glass outer tube, is (40-60) * 10
-7/ ℃, or select 4J29,4J44 iron nickel cobalt glass sealing alloy, linear expansion coefficient is (46-55) * 10
-7/ ℃; Iron nickel kovar alloy spare wall thickness is within 0.3-1mm.
5. line focusing solar vacuum heat-collecting tube sealing structure according to claim 1 and discharge mechanism is characterized in that: described eutectic microcrystal glass sealing material is that linear expansion coefficient is (40-60) * 10
-7/ ℃ lead-free low-melting devitrified glass metal sealing material.
6. line focusing solar vacuum heat-collecting tube sealing structure according to claim 1 and discharge mechanism is characterized in that: described discharge mechanism bellows node number is at least at the 2-20 ripple; The bellows wall thickness is 0.2-0.3mm; Described discharge mechanism bellows adopts stainless steel SUS304,321 or the SUS316L material.
7. line focusing solar vacuum heat-collecting tube sealing structure according to claim 1 and discharge mechanism is characterized in that: described metal inner pipe is for axially becoming wavy bellows tube, the crest height of wave 2-5mm of bellows tube, pitch of waves 10-30mm; The metal inner pipe diameter is at 25-60mm, and wall thickness is at 0.3-3mm.
8. line focusing solar vacuum heat-collecting tube sealing structure according to claim 1 and discharge mechanism is characterized in that: the high temperature resistant selective thermal absorber coatings of described metal inner pipe outer surface vacuum sputtering.
9. line focusing solar vacuum heat-collecting tube sealing structure according to claim 1 and discharge mechanism, it is characterized in that: described pipe connecting piece is the plate-like piece of central bore flange, endoporus and metal inner pipe are complementary, turn-up portion and metal inner pipe welding, flat end and discharge mechanism bellows directly weld, and material is stainless steel or carbon steel; Described pipe connecting piece is made into the metal tube of an end reducing, other end enlarging, and flared end connects with unloading bellows and welding procedure boxing, and the pipe connecting piece necking end that is sleeved on the band unloading bellows on the metal inner pipe welds with metal inner pipe outside metal end; Wall thickness is at 0.3-1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201439755U CN201122006Y (en) | 2007-04-17 | 2007-04-17 | Line focus solar vacuum heat-collecting tube sealing structure and discharging mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201439755U CN201122006Y (en) | 2007-04-17 | 2007-04-17 | Line focus solar vacuum heat-collecting tube sealing structure and discharging mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201122006Y true CN201122006Y (en) | 2008-09-24 |
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|---|---|---|---|
| CNU2007201439755U Expired - Lifetime CN201122006Y (en) | 2007-04-17 | 2007-04-17 | Line focus solar vacuum heat-collecting tube sealing structure and discharging mechanism |
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| CN (1) | CN201122006Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101290168B (en) * | 2007-04-17 | 2010-05-26 | 北京中航空港通用设备有限公司 | Sealing structure and unloading device of line-focused solar vacuum heat collecting tube |
| MD20080287A2 (en) * | 2008-12-04 | 2010-07-31 | Михаил КАРАГЯУР | Tracking solar collector |
| WO2011067289A3 (en) * | 2009-12-04 | 2012-04-19 | Schott Solar Ag | Absorber tube |
| CN102109235B (en) * | 2009-12-23 | 2012-08-01 | 张建城 | Line focusing solar energy intensified heat collecting tube and manufacturing method thereof |
| CN105258371A (en) * | 2015-11-10 | 2016-01-20 | 武汉凯迪工程技术研究总院有限公司 | Parabolic trough solar thermal power generation evacuated collector tube |
-
2007
- 2007-04-17 CN CNU2007201439755U patent/CN201122006Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101290168B (en) * | 2007-04-17 | 2010-05-26 | 北京中航空港通用设备有限公司 | Sealing structure and unloading device of line-focused solar vacuum heat collecting tube |
| MD20080287A2 (en) * | 2008-12-04 | 2010-07-31 | Михаил КАРАГЯУР | Tracking solar collector |
| WO2011067289A3 (en) * | 2009-12-04 | 2012-04-19 | Schott Solar Ag | Absorber tube |
| CN102639945A (en) * | 2009-12-04 | 2012-08-15 | 肖特太阳能控股公司 | Absorber tube |
| CN102109235B (en) * | 2009-12-23 | 2012-08-01 | 张建城 | Line focusing solar energy intensified heat collecting tube and manufacturing method thereof |
| CN105258371A (en) * | 2015-11-10 | 2016-01-20 | 武汉凯迪工程技术研究总院有限公司 | Parabolic trough solar thermal power generation evacuated collector tube |
| CN105258371B (en) * | 2015-11-10 | 2018-04-03 | 武汉凯迪工程技术研究总院有限公司 | Trough type solar power generation vacuum heat collection pipe |
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Effective date of registration: 20100408 Address after: 101312, No. 6, East Tianzhu Road, Tianzhu Airport Industrial Zone A, Beijing, Shunyi District Patentee after: Beijing Zhonghang Airport General Equipment Co., Ltd. Address before: 050071 Hebei Provincial Department of Commerce, Heping West Road, 334, Hebei, Shijiazhuang Patentee before: Zhang Jiancheng |
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