CN105890203A - Unloading structure and compound gettering device of line focusing solar reinforced heat collecting tube - Google Patents
Unloading structure and compound gettering device of line focusing solar reinforced heat collecting tube Download PDFInfo
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- CN105890203A CN105890203A CN201510033476.XA CN201510033476A CN105890203A CN 105890203 A CN105890203 A CN 105890203A CN 201510033476 A CN201510033476 A CN 201510033476A CN 105890203 A CN105890203 A CN 105890203A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
Abstract
The invention relates to an unloading structure and compound gettering device of a line focusing solar reinforced heat collecting tube and belongs to the technical field of solar heat power generation. The heat collecting tube is composed of an outer glass tube, a glass cut tube, an inner metal tube, iron-nickel Kovar parts, metal transition rings, metal end caps, unloading corrugated tubes, pipe joint parts, a compound gettering unit, an exhaust tube, a spoiler, a glass sealing-in material and a lead hot-press sealing-in end protection unit. According to the structure of the heat collecting tube, light irradiation to the unloading corrugated tube due to cosine illumination of a trough type solar condensation array is effectively avoided, the compound gettering unit is adopted for adapting to the solar heat power generation technology requirement in a traditional mode of fused salts, supercritical carbon dioxide and direct steam (DSG), and the requirements for high-temperature resistance, air impermeability, high efficiency, low cost, long service life and the like of the line focusing solar reinforced heat collecting tube are met.
Description
Technical field
The present invention relates to a kind of line focus sun that unloading structure and compound device of cooling down rationally are set
Thermal-collecting tube can be strengthened, its structure fully taken into account groove type solar light-condensing array because of cause sunshine cosine
Optically focused focal spot radiates, and high temperature resistant, air-tightness, high efficiency, low cost and long-life prescription,
Send out adapting to the solar heat under fused salt, supercritical carbon dioxide gas and live (open) steam (DSG) heat transfer modes
Power technology requirement.Belong to solar energy thermal-power-generating technical field.
Background technology
At present, use on groove type line-focusing solar thermal-collecting tube both at home and abroad more unloading structure and
Getter mainly has two kinds, and a kind of is the external corrugated tube unloading structure with Yolanda Soler company as representative, its
Secondary is the built-in corrugated pipe unloading structure of Schott AG of Germany, and China of China slowly science and technology and inventor are the most the earliest
Built-in corrugated tubular construction and built-in and outer is have employed in patent 01224848.7,200610076672.6
Put the unloading structure that corrugated tube combines, and latter there is no batch application.In fact, the choosing of unloading structure
Selecting and be closely related with getter, such as Yolanda Soler company uses thermal-collecting tube its getter master of thio-glycidyl ether structure
Slab construction to be selected designs, and is close to metal tube and is arranged on thermal-collecting tube side, and scarce filling is to increase getter
The long-term probability being caused desorbing by high-temperature baking；Germany Xiao Te then makes circular band and is arranged on unloading ripple
Manage with end cap between, or arrange palladium metal " hydrogen window " be close to metal end install, in addition these public affairs
Department also add the container containing gas krypton or xenon in patent 200610162523.1, by release inertia
Gas is to reduce minimum gas pyroconductivity.In a word, both thermal-collecting tubes design equal existing defects, the former
Unloading ripple pipe volume and specific surface area are the biggest, virtually add corrugated tube gas leakage probability, and
All use built-in unloading corrugated tube to there is also big a drawback, i.e. thermal-collecting tube and be in unloading of the light-condensing array south
Carry corrugated tube to be difficult to evade cosine light radiation, force it must install dark slide additional in case corrugated tube is by optically focused
Focal spot irradiates and causes gas leakage, but dark slide is fixed on outer glass tube and necessarily causes glass table
Surface temperature raises.The non-evaporable getter of configuration lacks activated at condition mostly the most at present, thus
It is difficult to ensure that inspiratory effects.From this, rationally select discharge mechanism and reasonable disposition getter to be still
The current key technology problem extending thermal-collecting tube service life.
Summary of the invention
The technical problem to be solved be use multiple getter structure, and rationally activate and
Non-evapotranspiring property getter is installed, continue to use in 200610076672.6 patents in discharge mechanism in corrugated tube, simultaneously
The unloading structure of outer setting, improves stability and the reliability of line-focusing solar strengthening thermal-collecting tube further,
Make it more adapt to and meet high temperature trough type solar power generation needs.
Problem alleged by the present invention is solved by techniques below scheme:
The unloading structure of line-focusing solar strengthening thermal-collecting tube and compound cool down device by outer glass tube,
Glass cuts pipe, metal inner pipe；Ferrum nickel can cut down part, metal transfer ring, metal end, unloading corrugated tube,
Pipe connecting piece；Compound device of cooling down, exhaustor, spoiler, glass sealing material, the protection of lead hot-press sealing end
Device forms, it is characterised in that: part, metal transfer ring, metal end, unloading ripple can be cut down by ferrum nickel
The discharge mechanism that pipe, pipe connecting piece order is welded to form is arranged on thermal-collecting tube two ends；Discharge mechanism is divided into outer unloading
Carry that to put with two kinds of unloading modes of interior discharge mechanism, preferably thermal-collecting tube one end be thio-glycidyl ether device, and another
End is interior discharge mechanism；Ferrum nickel can cut down part and cut the direct hot melt sealing-in of pipe one end with outer glass tube or glass；Ferrum
Nickel can cut down part and outer glass tube or glass cuts the glass inner flange of pipe one end or outward flange implements lead hot pressing envelope
Connect；Or ferrum nickel can cut down the welding ring that part is band Baltimore groove, glass cuts pipe insertion ferrum nickel and can cut down in part Baltimore groove
By glass sealing material indirect hot melting sealing-in；Ferrum nickel can cut down the part other end and unloading corrugated tube or metal transfer
Boxing connects；Pipe connecting piece and metal inner pipe argon arc welding；Exhaustor is welded on outer glass tube or glass cuts on pipe,
Between metal inner pipe and outer glass tube, vacuum chamber is constituted after vacuum exhaust；Metal inner pipe outer surface vacuum
Sputter high temperature resistant selective thermal absorber coatings；Compound device of cooling down is weldingly fixed on metal inner pipe or unloading
On device or metal end or metal transfer ring, it is arranged at exhaustor side；Lead hot-press sealing end
Protection device is set.
Described outer glass tube selects linear expansion coefficient to be 33 × 10-7/ DEG C high-boron-silicon glass pipe；Or choosing
Select linear expansion coefficient for (40-65) × 10-7/ DEG C neutrality 5.0 Pyrex, meet direct sealing by fusing connect or
Sealing-in needs indirectly.
Described glass cut pipe be linear expansion coefficient be (40-65) × 10-7/ DEG C neutrality 5.0 borosilicate glass
Glass, meets the requirement infiltrating to glass of glass-to-metal sealing technique after melting；According to requirements cut
Outer glass tube and the short glass tube that formed are to preferably implement glass and ferrum nickel can cut down the direct hot melt of part
Sealing-in and annealing process；Destressing of annealing should be focused on when using the direct process for sealing of hot melt；Employing lead heat
Outer glass tube when press seal connects selects linear expansion coefficient to be 33 × 10-7/ DEG C high-boron-silicon glass pipe, one end system
Making outward flange or inner flange, end face of flange is smooth.
Described ferrum nickel can cut down part and be divided into three kinds of structures according to process for sealing, and directly molten process for sealing uses
Becket structure；Sealing by fusing connects employing Baltimore groove becket structure indirectly；Hot-press sealing uses end cover structure；
One end and outer glass tube or glass cut pipe sealing-in, and the other end connects with unloading corrugated tube or metal transfer boxing；
Preferably ferrum nickel cobalt glass sealing alloy 4J29,4J44, linear expansion coefficient when 20-450 DEG C be (46-55) ×
10-7/ DEG C, consistent with the line expansion curve of neutral 5.0 outer glass tube；Lead hot-press sealing selects ferrum nickel to cut down
Alloy 4J42,4J45, linear expansion coefficient is (40-75) × 10 when 20-450 DEG C-7/℃；Wall thickness with
0.1-2mm is advisable, preferably 0.7mm；Ferrum nickel can cut down the pre-oxidation treatment of part be to ensure that direct sealing by fusing connect and
Connect the bubble-tight critical process of sealing-in, it is necessary to prudent treatment；Lead hot-press sealing should rationally determine sealing temperature,
Pressure, time, sealing-in atmosphere, it is ensured that obtain enough sealing strengths and air-tightness.
The linear expansion coefficient of described glass sealing material is (40-65) × 10-7/ DEG C, cut between glass
Pipe and ferrum nickel can cut down between part, soften and temperature of scattering is 300-800 DEG C；The low-melting-point glass powder oxidation selected
Lead content is between 30-60%；If outer glass tube is that neutral 5.0 glass then may select lead-free low-melting-point glass powder.
Described unloading ripple tube wave joint number at 2-20 ripple, preferably 3-5 ripple；Corrugated tube wall thickness is
0.15-0.3mm, wave height 5-16mm, pitch of waves 3-12mm, corrugated tube inside nominal diameter 32-120mm；Resisting fatigue
Life-span should be greater than 30,000 times；Preferably SUS304,321 or SUS316,316L stainless steel material；Slip
Controlling is 1.33 × 10 when operating mode 120 DEG C-10Pa.m3/sec.Corrugated tube wave number and wave height direct relation
The key indexs such as corrugated tube axial stress, specific surface area, high-temperature gas leak rate, service life, therefore must
Must repetition test rationally determine.
Described pipe connecting piece uses SUS304,321 or the highlighted stainless sheet steel of SUS316,316L；
Wall thickness is 0.3-2mm.The plate-like piece of inside port blockage, endoporus and metal centered by thio-glycidyl ether structural tube fitting
Interior sealing of tube, planar section end connects with unloading corrugated tube argon arc welding or soldering；Interior unloading structure pipe connects
Part is one end reducing that drawn technique is formed, the tube-like piece of other end enlarging, and minute surface is inwardly in the face of metal
Inner tube；Necking end and metal inner pipe argon arc welding, flared end and unloading bellows-welding.
Described metal end is the spill dome of the center drilling that stainless steel materials is stamped to form, wall thickness
0.3-2mm, preferably 0.7mm；Inner circle welding unloading corrugated tube, cylindrical welding ferrum nickel can cut down part or metal mistake
Cross ring；Deep concave metal end cap is to aim at the compound pump of cooling down of installation to provide position.
Described metal transfer ring is the metal ring that highlighted Thin Stainless Steel plate stretching is fabricated to, minute surface court
Outward, wall thickness 0.3-2mm, preferably 0.7mm；One end can outbox be welded with ferrum nickel, the other end and metal end
Welding；The purpose setting up metal transfer ring is: one is packaging technology needs, and two is by interior unloading corrugated tube
Being arranged in metal transfer ring, it is possible to decrease the hot irradiation energy of optically focused focal spot, three is to provide for compound pump of cooling down
Installation site.
Described metal inner pipe inside nominal diameter between 25-100mm, wall thickness between 0.3-5mm,
Nominal pressure between 0.6-25MPa, preferably SUS304,321 or SUS316,316L seamless stainless steel
Pipe；Or select for Molten Salt Heat Transfer working medium with the solution strengthening Ni-based deformation of type that molybdenum niobium is main intensified element
High temperature alloy pipes Inconel625, or NS336, GH3625, GH625 (Chinese) or NC22DNb (French),
Or W.Nr.2.4856 (German)；Or select high temperature resistant, the ultra-supercritical boiler XA704 of intergranular corrosion resistance,
TP347H, SUPER304H, TP310HCbN alloy seamless steel pipe；Metal inner pipe is configured to metal straight pipe,
Or bellows tube, or inner helix pipe, or outer spiral tube, or the luxuriant body luxuriant on regular of metal straight pipe surface
Bellows tube.
Described spoiler is stainless steel substrates, strikes out tail-like, and one end flanging welded is at metal inner pipe
On port inner wall, the other end is appropriately curved with disturbance working fluid, and each thermal-collecting tube welds one to three and disturbs
Flow；Or spoiler is designed to the width rectangle identical with metal inner pipe diameter or square, middle one-tenth
Ladder-shaped punching opening is respectively to both sides flange, and spoiler two ends are welded on the inwall of metal inner pipe one end,
Play two-way disturbance fluid matasomatism；Spoiler is of value to destruction current stabilization layer, causes heat-transfer working medium to form turbulent flow and passes
Heat, and then increase substantially photo-thermal conversion efficiency, reduce thermal exposure and heat loss, its principle and effect
All it is different from and is arranged on the metal fin of metal inner pipe for increasing heat transfer area.
Described exhaustor is 33 × 10-7/ DEG C high-boron-silicon glass pipe or neutral 5.0 borosilicate glass tubes,
Internal diameter 8-20mm, welding cuts on pipe at outer glass tube or glass.
Described compound device of cooling down refers to set up separately containing evaporable getter in thermal-collecting tube simultaneously
(EG) and activate and vacuum-packed non-evaporable getter (NEG)；Compound device of cooling down selects band stainless
Steel welding or cool down ring or cool down rod or cool down sheet or the band of cooling down of securing bracket；Described evaporable
Getter (EG) is barium aluminum nickel getter, and support solder joint is positioned on the metal inner pipe of exhaustor side, or
The stainless steel stent of ring of cooling down is weldingly fixed on discharge mechanism one end, the minimum 30-200mm of stent length,
Far as possible from unloading corrugated tube and pressing close to outer glass tube, after high frequency active, barium aluminum film should clearly become clear；Swash
Alive and vacuum-packed non-evaporable getter (NEG) select zirconium aluminum (ZrAl) or zirconium vanadium iron (ZrVFe),
Or zircon ink alloy getter, it is arranged on the other end of thermal-collecting tube, or on metal inner pipe or unload and carry
Put, away from unloading corrugated tube and pressing close to outer glass tube；Non-evaporable getter (NEG) uses semicircle to disappear
Band of gas structure, is welded by support or is fastened on unloading assembly, and be positioned at exhaustor side, away from unloading
Carry corrugated tube and press close to outer glass tube；Non-evaporable getter (NEG) can single or arranged in groups be strip
Tabular or semicircle；Stent length is identical with evaporable getter (EG) with points for attention；Activate also
Vacuum-packed non-evaporable getter (NEG) opens bag by high-frequency heating after heat-collecting pipe vacuum aerofluxus
Dress makes it normally work, or opens according to vacuum reduction degree after thermal-collecting tube work certain time in good time
Packaging；Selecting the non-flash getter of finished product after activating is to prevent from activating non-evapotranspiring in an assembling process to cool down
Agent directly or indirectly damages unloading corrugated tube and causes gas to leak；Owing to non-evaporable getter (NEG) is inhaled
Large-minded, particularly to the ability of hydrogen adsorption will relatively evaporable getter (EG) strong, therefore at thermal-collecting tube
Two ends are installed the compound device of cooling down of different getter compositions and with extending, holding heat-collecting pipe vacuum degree are used the longevity
Life has important function.
For improving heat-collecting pipe vacuum degree further, or select the miniature compound of built-in non-flash getter
Ionic pump (Mini-Combination IonPumps with NEG) or getter combination pump (Ion/Getter
Combination Pumps), it is referred to as the compound pump element of cooling down as compound device of cooling down of cooling down；Thermal-arrest
Pipe uses being arranged on metal end by compound pump of cooling down of thio-glycidyl ether structure；In thermal-collecting tube uses, unloading is tied
Structure compound pump of cooling down is arranged on outside thermal-collecting tube, installation site is in deep concave metal end cap or metal mistake
Cross on ring；It is respectively positioned on exhaustor side.
For preventing because physical damage causes lead hot-press sealing end gas to leak, set at hot-press sealing end
Putting protection device, described protection device is aluminium alloy or stainless sheet steel punching press is fabricated to circle, and aluminum closes
Gold ring is divided into front ring and rear ring；Front ring is L-shaped circle, and rear ring is two and half circles, and front and back ring is in hot pressing
Fasten after sealed end Guan Bi；Stainless sheet steel can also be struck out half circle of two band U-type groove, end
Portion is provided with fastener hole, and two and half circles fasten after hot-press sealing end closes.
When light-condensing array installs thermal-collecting tube, the present invention can ensure that the side arranging interior discharge mechanism is put
Put in the south, and thio-glycidyl ether device side is placed on the North, protective cover is arranged on collector tube holder simultaneously
On, can effectively prevent cosine optically focused focal spot to be directed through outer glass tube and irradiate discharge mechanism；Use evaporable
Getter (EG) and the non-evaporable getter (NEG) of vacuum activating belt packaging, or select compound cooling down
Pump constructs compound device of cooling down, it can be ensured that vacuum and the prolongation of line-focusing solar strengthening thermal-collecting tube make
Use the life-span.
Accompanying drawing explanation
Fig. 1 is that north and south of the present invention arranges two heat collection tube built-ins of light-condensing array and external unloading structure
End metal inner pipe connection diagram
Fig. 2 is the compound ring schematic diagram of cooling down of hot-press sealing of the present invention
Fig. 3 is that the direct sealing by fusing of the present invention connects compound band schematic diagram of cooling down
Fig. 4 is that metal transfer ring of the present invention installs compound pump schematic diagram of cooling down
Fig. 5 is that concave metal end cap of the present invention installs compound pump schematic diagram of cooling down
Fig. 6 is spoiler scheme of installation of the present invention
Wherein: 1 outer glass tube, 2 metal inner pipes, 3 ferrum nickel can cut down part, 4 unloading corrugated tubes,
5 metal ends, 6 pipe connecting pieces, 7 evaporable getters, 8 exhaustors, 9 glass cut pipe, 10 spoilers,
11 non-evaporable getters, 12 compound cool down pump, 13 metal transfer rings, 14 sealed end guard circles
Detailed description of the invention
1, the finished product non-evaporable getter after selecting evaporable getter (EG) 7 or activating
(NEG) 11 as the gettering material of compound device of cooling down, can be the ring of cooling down with stainless steel welded support,
Cool down rod, sheet of cooling down, band of cooling down.
2, evaporable getter 7 is barium aluminum nickel getter, and primary attachment glass and metal are at high temperature
The minimum gas of release under state；Support solder joint presses close to outer glass tube 1 as far as possible, and is positioned at exhaustor 8 one
On the metal inner pipe 2 of side, to reduce metal inner pipe 2 high-temperature baking.
3, the evaporable of band stainless steel stent ring 7 of cooling down is welded on discharge mechanism one end, and support is long
Spend away from the minimum 30-100mm of discharge mechanism, far as possible from unloading corrugated tube and pressing close to outer glass tube 1, high
After frequency activates, barium aluminum film should be in exhaustor 8 side；Prevent the high frequency active impact on unloading corrugated tube especially.
4, non-evaporable getter (NEG) 11 is arranged on the other end of thermal-collecting tube, or metal inner pipe 2
On, or on discharge mechanism；Stent length is identical with evaporable getter (EG) 7 with points for attention；
Non-evaporable getter (NEG) 11 vacuum packaging is opened in high-frequency heating makes it normally work.Due to non-evaporable
Getter (NEG) 11 inspiration capacity is big, particularly will relatively evaporable getter (EG) 7 to the ability of hydrogen adsorption
By force, different getter devices therefore it is respectively mounted at thermal-collecting tube two ends to keeping heat-collecting pipe vacuum degree to have
Important function；
5, it is to improve further heat-collecting pipe vacuum degree, it is also possible to selected non-flash getter built-in
Miniature compound ion pump (Mini-Combination IonPumps with NEG) or getter combination pump
The device of cooling down of (Ion/Getter Combination Pumps) 12, due to by ionic pump volumetric constraint,
On metal end 5 that installation site can only select discharge mechanism to be thio-glycidyl ether structure or metal transfer ring 13,
Or ferrum nickel can be able to be fixed on inside thermal-collecting tube, it is also possible to be fixed on outside thermal-collecting tube in outbox 3, but
Must be positioned at exhaustor side.Owing to high temperature modification non-evaporable getter 11 needs high temperature under vacuum
Activating, therefore in activation process, ionic pump inside magnet steel is had a negative impact by activated to be prevented.
6, the vigor of getter is in addition to the performance of self, essentially consists in the envelope of thermal-collecting tube itself
Connection technology and the high-temperature degassing to material process.Because the adsorbance of getter is limited after all, as
Fruit occurs slow gas leakage then can accelerate getter to lose efficacy, thus above-mentioned relevant sealing structure, technique, material,
The life-span of heat-collecting pipe vacuum degree and getter all can be played material impact by installation sites etc..
7, for preventing because physical damage causes lead hot-press sealing end gas to leak, at hot-press sealing
End arranges protection device, and described protection device is aluminium alloy or circle shape is made in stainless sheet steel punching press,
Aluminium alloy circle is divided into front ring and rear ring；Front ring is L-shaped circle, and rear ring is two and half circles, Qian Houhuan
Fasten after hot-press sealing end closes；Stainless sheet steel can also be struck out two with half U-shaped circle,
End is provided with fastener hole, and two and half circles fasten after hot-press sealing end closes.
8, thermal-collecting tube discharge mechanism is arranged on thermal-collecting tube two ends, and wherein one end is interior discharge mechanism,
The other end is thio-glycidyl ether device, and when light-condensing array is installed, interior discharge mechanism is in the south, and thio-glycidyl ether device exists
The North corresponding welding, protective cover is arranged in collector tube holder, in case optically focused focal spot is directly according to according to baking.
Claims (4)
1. unloading structure and the compound device of cooling down of line-focusing solar strengthening thermal-collecting tube is cut pipe, metal inner pipe by outer glass tube, glass；Ferrum nickel can cut down part, metal transfer ring, metal end, unloading corrugated tube, pipe connecting piece；Compound device of cooling down, exhaustor, spoiler, glass sealing material, lead hot-press sealing end protection device composition, it is characterised in that: can be cut down part by ferrum nickel, discharge mechanism that metal transfer ring, metal end, unloading corrugated tube, pipe connecting piece order are welded to form is arranged on thermal-collecting tube two ends；Discharge mechanism is divided into thio-glycidyl ether device and interior discharge mechanism, preferably thermal-collecting tube one end to be thio-glycidyl ether device, and the other end is interior discharge mechanism；Ferrum nickel can cut down part and cut the direct hot melt sealing-in of pipe one end with outer glass tube or glass；Ferrum nickel can cut down part and outer glass tube or glass cuts the glass inner flange of pipe one end or outward flange implements lead hot-press sealing；Or ferrum nickel can cut down the welding ring that part is band Baltimore groove, glass cuts in pipe insertion ferrum nickel can cut down part Baltimore groove and passes through glass sealing material indirect hot melting sealing-in；Ferrum nickel can cut down the part other end and connect with unloading corrugated tube or metal transfer boxing；Pipe connecting piece and metal inner pipe argon arc welding；Exhaustor is welded on outer glass tube or glass cuts on pipe, constitutes vacuum chamber after vacuum exhaust between metal inner pipe and outer glass tube；Metal inner pipe outer surface vacuum sputtering is high temperature resistant selective thermal absorber coatings；Compound device of cooling down is weldingly fixed on metal inner pipe or discharge mechanism or metal end or metal transfer ring, is arranged at exhaustor side；Lead hot-press sealing end arranges protection device；
1) described outer glass tube selects linear expansion coefficient to be 33 × 10-7/ DEG C high-boron-silicon glass pipe；Or selection linear expansion coefficient is (40-65) × 10-7/ DEG C neutrality 5.0 Pyrex, meet direct sealing by fusing and connect or indirect sealing-in needs；
2) described glass cut pipe be linear expansion coefficient be (40-65) × 10-7/ DEG C neutrality 5.0 Pyrex, melted after meet the requirement infiltrating to glass of glass-to-metal sealing technique；Destressing of annealing should be focused on when using the direct process for sealing of hot melt；Outer glass tube during lead hot-press sealing is used to select linear expansion coefficient to be 33 × 10-7/ DEG C high-boron-silicon glass pipe, one end makes outward flange or inner flange, and end face of flange is smooth；
3) described ferrum nickel can cut down part and is divided into three kinds of structures according to process for sealing, and directly molten process for sealing uses becket structure；Sealing by fusing connects employing Baltimore groove becket structure indirectly；Hot-press sealing uses end cover structure；One end and outer glass tube or glass cut pipe sealing-in, and the other end connects with unloading corrugated tube or metal transfer boxing；Preferably ferrum nickel cobalt glass sealing alloy 4J29,4J44, linear expansion coefficient is (46-55) × 10 when 20-450 DEG C-7/ DEG C, consistent with the line expansion curve of neutral 5.0 outer glass tube；Lead hot-press sealing selects ferrum nickel kovar alloy 4J42,4J45, and linear expansion coefficient is (40-75) × 10 when 20-450 DEG C-7/℃；Wall thickness is advisable with 0.1-2mm, preferably 0.7mm；Lead hot-press sealing should rationally determine sealing temperature, pressure, time, sealing-in atmosphere, it is ensured that obtains enough sealing strengths and air-tightness；
4) linear expansion coefficient of described glass sealing material is (40-65) × 10-7/ DEG C, between glass cut pipe and ferrum nickel can cut down between part, soften and temperature of scattering be 300-800 DEG C；The low-melting-point glass powder lead oxide content selected is between 30-60%；If outer glass tube is that neutral 5.0 glass then may select lead-free low-melting-point glass powder；
5) described unloading ripple tube wave joint number is at 2-20 ripple, preferably 3-5 ripple；Corrugated tube wall thickness is 0.15-0.3mm, wave height 5-16mm, pitch of waves 3-12mm, corrugated tube inside nominal diameter 32-120mm；Anti-fatigue life is more than 30,000 times；Preferably SUS304,321 or SUS316,316L stainless steel material；Slip controls to be 1.33 × 10 when operating mode 120 DEG C-10Pa.m3/sec；
6) described pipe connecting piece uses SUS304,321 or the highlighted stainless sheet steel of SUS316,316L；Wall thickness is 0.3-2mm；The plate-like piece of inside port blockage centered by thio-glycidyl ether structural tube fitting, endoporus welds with metal inner pipe, and planar section end connects with unloading corrugated tube argon arc welding or soldering；Interior unloading structure pipe connecting piece is one end reducing that drawn technique is formed, the tube-like piece of other end enlarging, and minute surface is inwardly in the face of metal inner pipe；Necking end and metal inner pipe argon arc welding, flared end and unloading bellows-welding；
7) described metal end is the spill dome of the center drilling that stainless steel materials is stamped to form, wall thickness 0.3-2mm, preferably 0.7mm；Inner circle welding unloading corrugated tube, cylindrical welding ferrum nickel can cut down part or metal transfer ring；Deep concave metal end cap is to aim at the compound pump of cooling down of installation to provide position；
8) described metal transfer ring is the metal ring that highlighted Thin Stainless Steel plate stretching is fabricated to, minute surface outwardly, wall thickness 0.3-2mm, preferably 0.7mm；One end can outbox be welded with ferrum nickel, and the other end welds with metal end；
9) described metal inner pipe inside nominal diameter is between 25-100mm, wall thickness between 0.3-5mm, nominal pressure between 0.6-25MPa, preferably SUS304,321 or SUS316,316L gapless stainless steel tube；Or select with the solution strengthening type ni-base wrought superalloy pipe Inconel625 that molybdenum niobium is main intensified element for Molten Salt Heat Transfer working medium, or NS336, GH3625, GH625 (Chinese) or NC22DNb (French) or W.Nr.2.4856 (German)；Or select high temperature resistant, ultra-supercritical boiler XA704, TP347H, SUPER304H, TP310HCbN alloy seamless steel pipe of intergranular corrosion resistance；Metal inner pipe is configured to metal straight pipe, or bellows tube, or inner helix pipe, or outer spiral tube, or the luxuriant bulk wave pipe joint luxuriant on regular of metal straight pipe surface；
10) described spoiler is stainless steel substrates, strikes out tail-like, and one end flanging welded is on metal inner pipe port inner wall, and the other end is appropriately curved with disturbance working fluid, each thermal-collecting tube one to three spoiler of welding；Or spoiler is designed to the width rectangle identical with metal inner pipe diameter or square, centre punched openings in echelon is respectively to both sides flange, and spoiler two ends are welded on the inwall of metal inner pipe one end, plays two-way disturbance fluid matasomatism；
11) described exhaustor is 33 × 10-7/ DEG C high-boron-silicon glass pipe or neutral 5.0 borosilicate glass tubes, internal diameter 8-20mm, welding cuts on pipe at outer glass tube or glass.
The unloading structure of line-focusing solar the most according to claim 1 strengthening thermal-collecting tube and compound device of cooling down, it is characterised in that: described compound device of cooling down refers to set up separately in thermal-collecting tube containing evaporable getter (EG) and the non-evaporable getter (NEG) that is vacuum-packed and activates simultaneously；Compound device of cooling down selects with stainless steel welded or cool down ring or cool down rod or cool down sheet or the band of cooling down of securing bracket；Described evaporable getter (EG) is barium aluminum nickel getter, support solder joint is positioned on the metal inner pipe of exhaustor side, maybe the stainless steel stent of ring of cooling down is weldingly fixed on discharge mechanism one end, the minimum 30-200mm of stent length, far as possible from unloading corrugated tube and pressing close to outer glass tube, after high frequency active, barium aluminum film should clearly become clear；The non-evaporable getter (NEG) being vacuum-packed and activating selects zirconium aluminum (ZrAl) or zirconium vanadium iron (ZrVFe) or zircon ink alloy getter, it is arranged on the other end of thermal-collecting tube, or on metal inner pipe or on discharge mechanism, away from unloading corrugated tube and pressing close to outer glass tube；Or non-evaporable getter (NEG) uses semicircle to cool down band structure, welded by support or be fastened on unloading assembly, and be positioned at exhaustor side, away from unloading corrugated tube and press close to outer glass tube；Or non-evaporable getter (NEG) is long strip-board shape or semicircle with single or arranged in groups；Stent length is identical with evaporable getter (EG) with points for attention；The non-evaporable getter (NEG) being vacuum-packed and activating opens packaging by high-frequency heating after heat-collecting pipe vacuum aerofluxus makes it normally work, or opens packaging according to vacuum reduction degree after thermal-collecting tube work certain time in good time.
The unloading structure of line-focusing solar the most according to claim 1 strengthening thermal-collecting tube and compound device of cooling down, it is characterized in that: select miniature compound ion pump (Mini-Combination IonPumps with NEG) or the getter combination pump (Ion/Getter Combination Pumps) of built-in non-flash getter, be referred to as the compound pump element of cooling down as compound device of cooling down of cooling down；Thermal-collecting tube uses being arranged on metal end by compound pump of cooling down of thio-glycidyl ether structure；Thermal-collecting tube use in unloading structure compound pump of cooling down is arranged on outside thermal-collecting tube, installation site is on deep concave metal end cap or metal transfer ring；It is respectively positioned on exhaustor side.
The unloading structure of line-focusing solar the most according to claim 1 strengthening thermal-collecting tube and compound device of cooling down, it is characterised in that: described lead hot-press sealing end protection device is aluminium alloy or stainless sheet steel punching press is fabricated to metal circle；Aluminium alloy circle is divided into front ring and rear ring, and front ring is L-shaped circle, and rear ring is two and half circles, and front and back ring fastens after hot-press sealing end closes；Or stainless sheet steel is struck out half circle of two band U-type groove, end is provided with fastener hole, and two and half circles fasten after hot-press sealing end closes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510033476.XA CN105890203A (en) | 2015-01-23 | 2015-01-23 | Unloading structure and compound gettering device of line focusing solar reinforced heat collecting tube |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510033476.XA CN105890203A (en) | 2015-01-23 | 2015-01-23 | Unloading structure and compound gettering device of line focusing solar reinforced heat collecting tube |
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| CN105890203A true CN105890203A (en) | 2016-08-24 |
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| CN201510033476.XA Pending CN105890203A (en) | 2015-01-23 | 2015-01-23 | Unloading structure and compound gettering device of line focusing solar reinforced heat collecting tube |
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| CN107144025A (en) * | 2017-05-14 | 2017-09-08 | 贵州绿卡能科技实业有限公司 | A kind of low sunshine high-efficiency solar collection hot product |
| CN108489110A (en) * | 2018-03-11 | 2018-09-04 | 宁夏博文利奥科技有限公司 | A kind of solar water heater with disturbing flow device |
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Application publication date: 20160824 |