CN201852331U - Line-focusing solar energy intensified heat collecting pipe - Google Patents
Line-focusing solar energy intensified heat collecting pipe Download PDFInfo
- Publication number
- CN201852331U CN201852331U CN2009202759891U CN200920275989U CN201852331U CN 201852331 U CN201852331 U CN 201852331U CN 2009202759891 U CN2009202759891 U CN 2009202759891U CN 200920275989 U CN200920275989 U CN 200920275989U CN 201852331 U CN201852331 U CN 201852331U
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- pipe
- glass
- unloading
- metal
- ring
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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 utility model provides a line-focusing solar energy intensified heat collecting pipe. The heat collecting pipe comprises a metal inner pipe, a glass outer pipe, a glass cutting pipe, an iron nickel kovar ring, a gettering ring, a high temperature resistant heat absorption coating, a gas exhaust pipe, glass sealing material, and a unloading component combined by a metal end cover, a unloading corrugated pipe and a pipe fitting through argon arc welding. As the metal inner pipe of the heat collecting pipe adopts various special structural designs and optimized manufacturing methods, the heat collecting pipe performs an intensified heat absorption function; and on the basis of improving the heat absorption efficiency, the investment cost of a groove type high temperature solar energy heat utilization light-gathering device can be reduced. The heat collecting pipe is particularly suitable for being used on a groove type solar energy heat power generating device. The utility model belongs to the technical field of solar energy heat utilization.
Description
Technical field
The utility model relates to a kind of line focus vacuum heat collection pipe that is used for groove type solar elevated temperature heat use device, because of the metal inner pipe of this thermal-collecting tube has adopted multiple special construction design and has optimized preparation method, make it possess reinforcement heat absorption function, on the basis of improving heat absorption efficient, help reducing groove type solar heat utilization beam condensing unit cost of investment.This thermal-collecting tube is particularly suitable for the trough type solar power generation device and uses.Belong to the solar energy utilization technique field.
Background technology
Line focusing solar collector tube is the main heat collecting element in the slot type heat utilization device, also is the core component in the trough type solar power generation device.At present, can Solel, Schot t and Archimede company be arranged for the enterprise that the trough type solar power generation device is manufactured this solar energy heat collection pipe, but, the employed metal inner pipe of the product of these enterprises is the straight tube structure design, exist obvious technological deficiency, particularly heat-transfer working medium when flowing through metal inner pipe, to form the current stabilization layer easily in actual applications, when hemisphere photo-thermal absorbs and change, the tube wall temperature difference can reach 80 degree, therefore hampers heat absorption efficient and further improves.The inventor is disclosed to manage in the metal node in Chinese patent 03218208.2, pipe and bellows are the built-in metal flow passage solar vacuum heat-collecting tube of principal character in the twisted string, with patent 200420091975.1,200620158355.4 and in the patent 200720143975.5, for the groove type line-focusing device provides selectable solar vacuum heat-collecting pipe with enhanced heat exchange function, the photo-thermal that has obviously improved thermal-collecting tube absorbs and the hot working fluid conversion efficiency, its principle just is annular node or the spiral node structure that metal inner pipe forms on axial arrangement, when heat conduction wet goods heat-transfer working medium is flowed through metal inner pipe, destroyed the current stabilization layer, become the laminar flow heat absorption and be the eddy current heat absorption.Studying in order further to adapt to present international solar energy heat build-up generating (CSP) field, mainly fused salt that uses to substitute conduction oil and direct water are done two kinds of technology of DSG (direct steam generation) of heat-transfer working medium, the advantage of thermal-collecting tube in substituting conduction oil strengthened in performance, must be target just, on metal inner pipe structure and preparation method, be optimized to improve thermal-collecting tube mechanical strength, heat absorption efficient and to reduce heat loss.
Summary of the invention
Technical problem to be solved in the utility model is to be target to improve that line-focusing solar strengthens thermal-collecting tube mechanical strength, heat absorption efficient and reduce heat loss, substitutes the improvement that working medium is carried out thermal-collecting tube structure and manufacture method for adapting to a new generation.
The utility model has adopted following technical scheme:
A kind of line-focusing solar strengthen thermal-collecting tube by metal inner pipe, glass outer tube, glass cut that pipe, iron nickel can cut down ring, the ring of cooling down, high temperature heat-resistant absorber coatings, blast pipe, glass sealing material and by metal end, unload bellows, pipe connecting piece and weld the unloading assembly that makes up through argon arc and form, it is characterized in that:
Described metal inner pipe is the thermoexcell of metal ring bellows tube or metallic coil or metal bud bulk wave pipe joint, or have the bellows of 2-20 ripple and bellows tube one from the unloading wave pipe joint; Wall thickness is at 0.3-13mm; Select the stainless-steel seamless pipe of 450 ℃ of high temperature of tolerance for use, or tolerate the boiler alloy seamless steel pipe of high temperature more than 450 ℃, or stainless steel welding tube; Pressure-bearing is in the 2-30 MPa.
It is (40-65) * 10 in the time of 20 ℃-500 ℃ that described glass outer tube is selected linear expansion coefficient
-7k
-1Neutral Pyrex, linear expansion coefficient is (40-50) * 10 when temperature is between 20 ℃-300 ℃
-7k
-1Glass outer tube wall thickness is at 1.8-5mm; Light transmittance is greater than 90%, apply and the sinterable silicon gel after greater than 95%; Or linear expansion coefficient is 33 * 10
-7/ ℃ high-boron-silicon glass.
Described glass cuts the process transition pipe of pipe for sealing-in unloading assembly and glass outer tube, and glass cuts pipe and according to Len req the glass outer tube cut, and length is 30-60mm; Wherein an end is made the glass flange, or outward flange, or inner flange; Glass flange end and iron nickel can cut down the ring sealing by fusing and connect, and the other end and glass outer tube sealing by fusing connect.
Described iron nickel can cut down the linear expansion coefficient of ring in (40-65) * 10
-7/ ℃ between, mainly select 4J29 or 4J44 kovar alloy, become ring in convex outer shroud or the convex, wall thickness 0.3-2mm is based on 0.7mm; An end weld metal end cap wherein, the other end and glass cut the direct sealing by fusing of pipe and connect; Or by low-melting-point glass powder and glass cut the pipe indirect sealing by fusing connect; Or cut the pipe flange plane by metallic lead or metallic aluminium hot-press sealing to glass and locate.
Described unloading assembly is welded to form through argon arc by metal end, unloading bellows, pipe connecting piece, and is arranged on line-focusing solar reinforcement thermal-collecting tube two ends.
Described metal end is the spill dome of the center drilling that is stamped to form of stainless steel materials, wall thickness 0.3-2mm; Interior circle welding unloading bellows, cylindrical welding iron nickel can cut down ring.
Described unloading bellows is the stainless steel thin-wall welded pipe through rise ripple moulding or beat the ripple extrusion moulding of plasticity, and the ripple number is at least at the 2-20 ripple, and welding straight flange end is left at two ends, an end weld metal end cap wherein, other end welded pipe fitting.
Described pipe connecting piece is that stainless steel welding tube is made, an end reducing other end enlarging, flared end and the welding of unloading bellows, necking end and metal inner pipe welding.
The described ring of cooling down is the alloy hoop of evaporable barium alumel material and stainless steel stent one, is welded on the metal inner pipe.
Described high temperature heat-resistant absorber coatings is ceramic high temperature resistant selective thermal absorber coatings, adopts the method for vacuum sputtering or magnetron sputtering to produce on the metal inner pipe surface.
Described blast pipe is neutral 5.0 borosilicate glass tubes, and material is consistent with the glass outer tube with linear expansion coefficient, and welding cuts on the pipe at glass.Blast pipe connects the vacuum exhaust machine, and vacuum reaches (3-5) * 10
-3Sealing by fusing exhaust pipe mouth behind the handkerchief.
Described glass sealing material is for having lead or lead-free low-melting-point glass powder, and sealing temperature is at 300-800 ℃, and linear expansion coefficient is in (40-65) * 10
-7/ ℃, the glass sealing material being coated in evenly glass cuts pipe and iron nickel can cut down between the ring, sealing by fusing connects that glass cuts pipe and iron nickel can cut down ring in the sealing-in atmosphere of setting.
Glass-to-metal sealing also can be adopted metallic lead, aluminium transition hot-press sealing, but requires glass flange sealing surface necessary smooth.
Above-mentioned from the unloading wave pipe joint select for use fineness preferably stainless steel band be connected into stainless pipe through the tuber argon arc welding, latus rectum is 25-65mm, wall thickness is 0.3-0.5mm.Make the bellows that ripple becomes standard from unloading wave pipe joint one end, the node number is the 2-20 ripple, and wave height is 3-12mm.Adjust ripple control ripple mechanism wave height and pitch of waves length, wave height 1-6mm, pitch of waves 10-65mm according to working medium characteristic and flow velocity; Straight flange end and pipe connecting piece welding are reserved in both sides.Adopt prestressing method to stretch from the unloading wave pipe joint when the assembling thermal-collecting tube, tensile elongation is greater than 8mm, and pipe connecting piece and the metal end with two ends welds then.Its scope of application be the working medium temperature less than 300 ℃, internal pressure is less than 2 MPas, liquid or gas working medium such as the less conduction oil of corrosivity, ethylene glycol, anti-icing fluid.
Described luxuriant bulk wave joint is promptly in the circular or oval bulge of the regular cross-distribution in metal inner pipe surface; Bud bulk wave joint wave height and wavelength are determined according to working medium fluid properties and flow velocity, highly are 1-3mm; Length is based on equidistant node.
Find out by the above, core of the present utility model is the selection of neutral 5.0 glass and the processing and fabricating of metal inner pipe, because the profile of bellows tube concave-convex surface, can make fluid in pipe, form stronger turbulent flow, thereby improve the coefficient of heat transfer greatly, contrast is learnt by analysis, and bellows tube has improved 2-3 doubly than the average nusselt number of metal straight pipe, has therefore strengthened the heat exchange function of thermal-collecting tube.
Description of drawings
Fig. 1 is the indirect sealing by fusing T-Ring of a utility model outward flange shape bellows tube schematic diagram
Fig. 2 is that the indirect sealing by fusing of the utility model inner flange connects the metallic coil schematic diagram
Fig. 3 is a unloading wave pipe joint schematic diagram in the utility model lead, aluminothermy press seal connect
Fig. 4 is that the direct sealing by fusing of the utility model connects metal bud bulk wave pipe joint schematic diagram
Wherein
Metal inner pipe 1, glass outer tube 2, glass cut that pipe 3, iron nickel can cut down ring 4, metal end 5, pipe connecting piece 6, the ring 7 of cooling down, unload bellows 8, high temperature heat-resistant absorber coatings 9, blast pipe 10, the ring support 11 of cooling down, glass sealing material 12 outward
The specific embodiment
Embodiment one:
Inner swelling method is produced annular node or spiral node metal inner pipe, and its preparation method is:
1) by moulding variable-length and thermal-collecting tube Len req intercepting seamless steel pipe, the metal tube internal diameter is at 25-80mm; Wall thickness is at 0.3-3mm.
2) adopt bloated type method of oil pressure or the bloated piece preparation method of polyamine fat or the bloated type legal system of high temperature air pressure to make annular node or spiral node in the film chamber, the node height is determined according to working medium characteristic and flow velocity, preferred 1-3mm.
3) node length is that standard is divided into the short distance node with the thermal-collecting tube internal diameter, be that node length is less than the thermal-collecting tube internal diameter, equidistant node is that node length equals the thermal-collecting tube internal diameter, or length is that node length is greater than the thermal-collecting tube internal diameter apart from node, wherein preferred equidistant node structure guarantees that after aligning the axial bending degree is less than 3%.
4) bellows tube to moulding carries out surface finish, is that the high brightness stainless steel seamless pipe then can reduce this step as what adopt.
5), guarantee the air-tightness of seamless steel pipe by helium mass spectrum leak detection.
6) metal inner pipe is placed in 500 ℃ of vacuum environments carries out high-temperature degassing, stainless steel can be set in 400 ℃; Can add nitrogen or other gas shields in the deaerating chamber, prevent the oxidation of metal inner pipe surface transition.
7) the high temperature resistant selective thermal absorber coatings of vacuum sputtering.As shown in Figure 1, 2.
Embodiment two:
Moulding the making annular node of method or the method for spiral node outward is, adopts the outer method of moulding such as extension mechanical stitch or spinning to make annular node or spiral node on the seamless steel pipe outer wall, and additive method is the same.
Embodiment three:
Preparation method from unloading wave joint metal inner pipe is:
1) have from its scope of application of bellows tube that unloads function be the working medium temperature less than 300 ℃, internal pressure is less than 2 MPas, liquid or gas working mediums such as the less conduction oil of corrosivity, ethylene glycol, anti-icing fluid.
2) select for use fineness preferably stainless strip be connected into stainless pipe through the argon arc welding of tubulation unit, the metal inner pipe latus rectum is 25-65mm, wall thickness is 0.3-0.5mm.
3) the stainless steel metal pipe enters ripple control ripple prow and makes unloading segment earlier, promptly makes the bellows that ripple is configured as standard at metal inner pipe one end, and the node number is the 2-20 ripple.
4) beat wave height and pitch of waves length according to working medium characteristic and flow velocity adjustment ripple control ripple machine, beat ripple then continuously and become to have from the node metal inner pipe that unloads function, wave height 1-6mm, pitch of waves 10-65mm; Straight flange end and pipe connecting piece welding are reserved in both sides.
5) owing to do not need to be provided with separately the unloading bellows from the unloading wave pipe joint, therefore must adopt prestressing method stretching metal inner pipe when the assembling thermal-collecting tube, tensile elongation is greater than 8mm, and pipe connecting piece and the metal end with two ends welds then.Other preparation methods are the same.As shown in Figure 3.
Embodiment four:
Bud bulk wave joint metal inner pipe preparation method is:
1) adopt oil pressure or pneumatic process on metal inner pipe, to produce luxuriant body, circle, rectangle or oval bulge that described luxuriant bulk wave joint promptly forms on the metal inner pipe surface, preferred oval luxuriant bulk wave joint through plastic deformation.
2) luxuriant body becomes regular cross-distribution on the metal inner pipe surface, preferred trihedral cross-distribution structure.
3) determining luxuriant body overhead height and luxuriant body length according to working medium fluid properties and flow velocity, highly is 1-3mm; Length is based on equidistant node, or selection is long apart from node.As shown in Figure 4.
Claims (3)
- A line-focusing solar strengthen thermal-collecting tube by metal inner pipe, glass outer tube, glass cut that pipe, iron nickel can cut down ring, the ring of cooling down, high temperature heat-resistant absorber coatings, blast pipe, glass sealing material and by metal end, unload bellows, pipe connecting piece and weld the unloading assembly that makes up through argon arc and form, it is characterized in that:1) described metal inner pipe is the reinforcement thermal-collecting tube of metal ring bellows tube or metallic coil or metal bud bulk wave pipe joint, or have the bellows of 2-20 ripple and bellows tube one from the unloading wave pipe joint; Wall thickness is at 0.3-13mm; Select the stainless-steel seamless pipe of 450 ℃ of high temperature of tolerance for use, or tolerate the boiler alloy seamless steel pipe of high temperature more than 450 ℃, or stainless steel welding tube; Pressure-bearing is in the 2-30 MPa;2) described glass outer tube selection linear expansion coefficient is (40-65) * 10 in the time of 20 ℃-500 ℃ -7k -1Neutral Pyrex, when temperature during at 20 ℃-300 ℃ linear expansion coefficient be (40-50) * 10 -7k -1Glass outer tube wall thickness is 1.8-5mm; Light transmittance is greater than 90%, apply and the sinterable silicon gel after greater than 95%; Or linear expansion coefficient is 33 * 10 -7/ ℃ high-boron-silicon glass;3) described glass cuts the process transition pipe of pipe for sealing-in unloading assembly and glass outer tube, is according to Len req the glass outer tube to be cut, and length is 30-60mm; Wherein an end is made the glass flange, or outward flange, or inner flange, can cut down with iron nickel that the ring sealing by fusing connects or press seal connects; The other end and glass outer tube sealing by fusing connect;4) described iron nickel can cut down the linear expansion coefficient of ring in (40-65) * 10 -7/ ℃ between, select 4J29 or 4J44 kovar alloy, become ring in convex outer shroud or the convex, wall thickness 0.3-2mm; An end weld metal end cap wherein, the other end and glass cut the direct sealing by fusing of pipe and connect; Or by low-melting-point glass powder and glass cut the pipe indirect sealing by fusing connect; Or by metallic lead, or metallic aluminium hot-press sealing to glass cuts place, pipe flange plane;5) described unloading assembly is welded to form through argon arc successively by metal end, unloading bellows, pipe connecting piece, and is arranged on line-focusing solar reinforcement thermal-collecting tube two ends;6) described metal end is the spill dome of the center drilling that is stamped to form of stainless steel materials, wall thickness 0.3-2mm; Interior circle welding unloading bellows, cylindrical welding iron nickel kovar alloy ring;7) described unloading bellows is the stainless steel thin-wall welded pipe through rise ripple moulding or beat the ripple extrusion moulding of plasticity, and the ripple number is at least at the 2-20 ripple, and welding straight flange end is left at two ends, an end weld metal end cap wherein, other end welded pipe fitting;8) described pipe connecting piece is made for the stainless steel thin-wall welded pipe, an end reducing other end enlarging, flared end and the welding of unloading bellows, necking end and metal inner pipe welding;9) the described ring of cooling down is the alloy hoop of evaporable barium alumel material and stainless steel stent one, is welded on the metal inner pipe;10) described high temperature heat-resistant absorber coatings is ceramic high temperature resistant selective thermal absorber coatings;11) described blast pipe is neutral 5.0 borosilicate glass tubes, and material is consistent with the glass outer tube with linear expansion coefficient, and welding cuts on the pipe at glass;12) described glass sealing material be sealing temperature at 300-800 ℃, linear expansion coefficient is in (40-65) * 10 -7/ ℃ the low-melting-point glass powder, it evenly is coated in glass cuts pipe and iron nickel and can cut down between the ring sealing by fusing and connect that glass cuts pipe and iron nickel can cut down ring.
- 2. line-focusing solar according to claim 1 is strengthened thermal-collecting tube, it is characterized in that: above-mentioned metal inner pipe is that latus rectum is 25-65mm from the unloading wave pipe joint, and wall thickness is 0.3-0.5mm; Make the bellows that ripple becomes standard from unloading wave pipe joint one end, the node number is the 2-20 ripple, and wave height is 3-12mm; Wave height and pitch of waves length are according to working medium characteristic and flow velocity adjustment, wave height 1-6mm, pitch of waves 10-65mm; Straight flange end and pipe connecting piece welding are reserved in both sides; Adopt prestressing method to stretch from the unloading wave pipe joint when the assembling thermal-collecting tube, tensile elongation is greater than 8mm, and pipe connecting piece and the metal end with two ends welds then.
- 3. line-focusing solar according to claim 1 is strengthened thermal-collecting tube, it is characterized in that: described metal bud bulk wave joint is promptly in the circular or oval bulge of the regular cross-distribution in metal inner pipe surface; Bud bulk wave joint wave height and wavelength are determined according to working medium fluid properties and flow velocity, highly are 1-3mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202759891U CN201852331U (en) | 2009-12-23 | 2009-12-23 | Line-focusing solar energy intensified heat collecting pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202759891U CN201852331U (en) | 2009-12-23 | 2009-12-23 | Line-focusing solar energy intensified heat collecting pipe |
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| CN201852331U true CN201852331U (en) | 2011-06-01 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305483A (en) * | 2011-09-16 | 2012-01-04 | 张建城 | Heat collection tube for trough-type solar thermal power generation |
| CN102393093A (en) * | 2011-11-22 | 2012-03-28 | 张建城 | Line focus solar energy enhanced collector tube provided with composite getter device |
| CN102519160A (en) * | 2011-12-27 | 2012-06-27 | 皇明太阳能股份有限公司 | Straight-through solar collector tube |
| CN102589168A (en) * | 2011-11-16 | 2012-07-18 | 张建城 | Line-focus solar heat collecting tube provided with hot-pressing sealing protection device |
| CN112648749A (en) * | 2020-12-28 | 2021-04-13 | 真木农业设备（安徽）有限公司 | High-efficiency heat storage and exchange device |
| CN112648747A (en) * | 2020-12-28 | 2021-04-13 | 真木农业设备（安徽）有限公司 | All-glass solar bi-pass heat collecting pipe |
-
2009
- 2009-12-23 CN CN2009202759891U patent/CN201852331U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305483A (en) * | 2011-09-16 | 2012-01-04 | 张建城 | Heat collection tube for trough-type solar thermal power generation |
| CN102589168A (en) * | 2011-11-16 | 2012-07-18 | 张建城 | Line-focus solar heat collecting tube provided with hot-pressing sealing protection device |
| CN102393093A (en) * | 2011-11-22 | 2012-03-28 | 张建城 | Line focus solar energy enhanced collector tube provided with composite getter device |
| CN102393093B (en) * | 2011-11-22 | 2014-07-02 | 张建城 | Line focus solar energy enhanced collector tube provided with composite getter device |
| CN102519160A (en) * | 2011-12-27 | 2012-06-27 | 皇明太阳能股份有限公司 | Straight-through solar collector tube |
| CN112648749A (en) * | 2020-12-28 | 2021-04-13 | 真木农业设备（安徽）有限公司 | High-efficiency heat storage and exchange device |
| CN112648747A (en) * | 2020-12-28 | 2021-04-13 | 真木农业设备（安徽）有限公司 | All-glass solar bi-pass heat collecting pipe |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110601 Termination date: 20131223 |