CN101487636A - Use of aluminum alloy pipe in metal vacuum pipe solar heat collector regulator - Google Patents
Use of aluminum alloy pipe in metal vacuum pipe solar heat collector regulator Download PDFInfo
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- CN101487636A CN101487636A CNA2009100028985A CN200910002898A CN101487636A CN 101487636 A CN101487636 A CN 101487636A CN A2009100028985 A CNA2009100028985 A CN A2009100028985A CN 200910002898 A CN200910002898 A CN 200910002898A CN 101487636 A CN101487636 A CN 101487636A
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- heat collector
- metal vacuum
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a method for applying a metal pipe to a metal vacuum tubular solar thermal collector adjustor, particularly, using an aluminum alloy tube as a main tube component of the adjustor. The method comprises the following procedures: selecting the aluminum alloy with tensile strength of 130-183MPa at 25 DEG C; adopting welding process to adjust a weld gap to be 0.05-0.15mm; adopting flame welding and controlling the welding temperature to be 420-480 DEG C; and anti-corroding. Solar station and water pipe joint connecting pieces communicated with the adjustor adopt aluminum alloy connecting pieces. The invention aims at applying the aluminum pipe to the metal vacuum tubular solar thermal collector adjustor, so as to reduce the cost of the adjustor, reduce the weight and promote the popularization of new energy.
Description
(1) technical field
The present invention relates to the application process of a kind of metal pipe material on metal vacuum pipe solar heat collector regulator, especially, introduce aluminium-alloy pipe as adjuster main member tubing.
(2) background technology
Iron, aluminium, three kinds of metallic elements of copper are used at most in modernization industry is produced, and specific to field of solar energy, above-mentioned three kinds of metals all have application.But just at present, on metal vacuum pipe solar heat collector regulator, just had only iron and copper adjuster.
Specify the structure of adjuster here again.With reference to Figure of description 1, adjuster generally includes a person in charge 4 and the U type pipe group 8 with an above U type pipe 9 that is welded on this person in charge, and be welded on temperature tube 1 on the person in charge, wherein each U type pipe comprises the bending of one 180 degree, spend bending for then comprising two 90 by straight tube connector 6 connections between U type Guan Zuzhong U type pipe, and used tubing thickness is many at 0.7～1.0mm.In selection, above-mentioned bending need be considered the ductility of material so, and the solderability of thin-wall pipe besides needs to consider the electrochemical properties of the intensity and the material of tubing in addition.
No. 200720025767.5 utility model patent of State Bureau shows the structure of present metal vacuum pipe solar heat collector regulator, and adjuster present general material, i.e. copper and stainless steel.
In the metal vacuum pipe solar heat collector regulator field, copper pipe applications is the widest.The thermal conductivity factor of copper is 350～398w/mK, is only second to noble metal silver in metal, and has good ductility, and metal active is low, avoids electrochemical corrosion easily.But its application is subject to it than great, the price height, and under same intensity and withstand voltage condition, unit adjuster cost is higher, and weight is bigger than normal.
Therefore, the trend of present useful stainless steel adjuster instead of copper adjuster, whole account cost, its cost decrease to some degree.But because the proportion and the copper of iron are very nearly the same, though its strength ratio is bigger, machinability is good, and just at present, adjuster weight is compared what is not reduced.The most important thing is because stainless thermal conductivity factor 52～68w/mK, and nonideal heat exchanger material, can sacrifice a part of heat collector hot property like this and get manufacturing cost in return and descend that from the process in whole service life of heat collector, this way loses more than gain.
As for aluminium section bar, though be used widely in the solar energy industry at present, also be only limited to such as header, these unessential members of tailstock.Though aluminium section bar has the branch of duralumin section bar and soft aluminium section bar, but for the former, its extension poor performance is easy to jackknifing in the bending process, and defect rate is too high; And for the latter, though bending is easy, bad mechanical property.Therefore, because the above-mentioned attribute of aluminium section bar makes if want to find a kind of suitable aluminium section bar promptly have better machinability, and there is obstacle in the aluminium section bar with certain mechanical strength, also do not have successful story at present.Because element aluminum is the more intense metallic element of a kind of metal active, in using, heat collector how to prevent that electrochemical corrosion from also being the problem that needs consideration in addition.Thin-wall aluminum alloy pipe fitting welding performance is poor in addition, is easy to weldering and leaks, and other weld defect perhaps can occur.In view of the above, aluminium-alloy pipe is applied to also there is huge technology barrier on the adjuster.
(3) summary of the invention
From above-mentioned prior art, task of the present invention is aluminium-alloy pipe is applied on the metal vacuum pipe solar heat collector regulator, to reduce adjuster cost and weight reduction, promotes the popularization of new forms of energy.
In order to realize above-mentioned task, the present invention by the following technical solutions:
This invention aluminium-alloy pipe application on metal vacuum pipe solar heat collector regulator, it comprises following technology:
Tensile strength when being chosen in 25 ℃ is at the aluminium alloy of 130～183MPa, and employing
Welding procedure, the adjustment weld gap is 0.05～0.15mm, adopts the flame welding, and the control welding temperature is at 420 ℃～480 ℃; And
Anticorrosion, solar energy plant and the pipeline connecting parts of leaking water that is communicated with adjuster adopt the aluminum alloy material connector.
The application of above-mentioned aluminium-alloy pipe on metal vacuum pipe solar heat collector regulator, said aluminium section bar preferably the tensile strength in the time of 25 ℃ at the aluminium alloy of 130～183MPa.
The application of above-mentioned aluminium-alloy pipe on metal vacuum pipe solar heat collector regulator, said aluminum alloy materials adopts 3003 series alloys.
Also comprise in the technology of said control welding temperature and adopt infrared radiation thermometer to carry out real-time thermometric, so that the temperature control parameter to be provided.
The application of above-mentioned aluminium-alloy pipe on metal vacuum pipe solar heat collector regulator, the described adjuster U-shaped pipe that has adopted aluminum alloy material and be responsible for thickness with respect to position copper pipe thickening 30%.
The application of above-mentioned aluminium-alloy pipe on metal vacuum pipe solar heat collector regulator before the welding, will be responsible for and fix, and make making progress corresponding to U type pipe group patchhole of its preboring; U type pipe group interface is poured into corresponding inserting in the hole, and the axiality that guarantees respective socket and respective aperture is less than φ 0.01mm, and clamping.
Task of the present invention at first in selection, based on this, on the basis of satisfying adjuster pressure-bearing condition, selects multiple tubing to carry out folding test.Bending at present adjuster all concentrates in the processing of U-shaped pipe group, promptly between 180 of U type body degree bendings and two U-shaped bodys straight pipe two ends one 90 degree bendings are respectively arranged.In the bending experiment, adopt conventional machined means, through the too much test of group aluminum alloy tubing, select the aluminium section bar of tensile strength values between 130～183MPa, its bending lumber recovery is greater than 91.7%, wherein part is slightly poorer than existing copper section bar, and part and copper section bar are very nearly the same, can satisfy instructions for use fully.Consider the cost and the proportion of aluminium section bar,, adopt aluminium section bar from the section bar cost, also can significantly reduce even if its lumber recovery is low relatively.And because the thermal conductivity factor of aluminium alloy is 237～278w/Mk, more lower slightly than copper, but also comparatively approaching, can satisfy the application on adjuster fully.
And on welding procedure, the adjustment weld gap is 0.05～0.15mm, adopts the flame welding, and the control welding temperature is at 420 ℃～480 ℃; Above-mentioned gap is unsuitable too small, too small easy not weld penetration, and the excessive scolder that then needs is many, and welding quality should not guarantee that vibratory impulse easily snaps; And weld seam is excessive, and the welding process distribute heat is many, and the temperature control ratio is more difficult.Because generally about 460 ℃, the temperature requirements of metal solder can be satisfied in the said temperature interval to the recrystallization temperature of above-mentioned aluminium section bar, satisfying under the situation of weld strength, and preventing to produce the possibility that weldering is leaked.Through the welding checking of reality, under the condition of routine, temperature is controlled in the above-mentioned interval, can not occur welding defective leakage basically.
In order effectively to prevent electrochemical corrosion, solar energy plant and the pipeline connecting parts of leaking water that is communicated with adjuster adopt the aluminum alloy material connector.Certainly, the Al-alloy parts here might not be in full accord with the adjuster material, can adopt lower-cost aluminum casting.Electrochemical corrosion is relative, and former above-mentioned connector majority is copper connector, if adopt the adjuster of aluminium alloy, will inevitably produce electrochemical reaction.Adopt 5% the deionization sodium chloride solution simulation system HTHP of on solar water heating system, heating, test through 10 months, the aluminum metal pipe is observed under 200 power microscopes, have only spot corrosion to begin, the top high temperature of mentioning adopts 120 ℃ of the limiting temperatures of present solar thermal collector, and pressure is 1.5MPa.
(4) description of drawings
Fig. 1 is the structural representation of metal vacuum pipe solar heat collector regulator.
Among the figure: 1, temperature tube, 2, first solder joint, 3,90 degree bendings, 4, be responsible for, 5, second solder joint, 6, straight tube connector, 7,180 degree bendings, 8, U type pipe group, 9, U type pipe.
(5) specific embodiment
Specify the present invention below in conjunction with Figure of description, wherein Figure of description 1 is a controller structure schematic diagram commonly used at present, and the inside shows 90 degree bendings 3 and 180 degree bendings 7, and pad.
Specific to the application of aluminium-alloy pipe on metal vacuum pipe solar heat collector regulator, it comprises following technology:
Tensile strength when being chosen in 25 ℃ is at the aluminium alloy of 130～183MPa, and employing
Welding procedure, the adjustment weld gap is 0.05～0.15mm, adopts the flame welding, and the control welding temperature is at 420 ℃～480 ℃; And
Anticorrosion, solar energy plant and the pipeline connecting parts of leaking water that is communicated with adjuster adopt the aluminum alloy material connector.
As for top number range, said tensile strength in this interval range, all can obtain in the lumber recovery scope of higher above-mentioned 90 degree bendings and 180 degree bending permissions.Certainly, the density of aluminium alloy extrusions is mostly at 2.7g/cm
3Less than 1/3 of copper, intensity under the same cross-sectional coefficient, above-mentioned aluminium section bar is more a bit weaker than copper shapes, but with regard to present bearing capacity, copper and stainless steel design of Regulator pressure are all at 3MPa, but in actual the use, comprise the heat collector with bearing capacity, majority all is provided with the unloading pressure protection device under 3～7ba (1ba=0.1MPa) situation, and above-mentioned design is too more than needed; Under the same conditions, above-mentioned aluminium alloy can have the bearing capacity of 2MPa, and safety coefficient can satisfy instructions for use fully.Therefore under this section factor, the weight of used aluminium section bar is about 1/3 of copper material, and cost and weight all reduce greatly.
As for above-mentioned weld gap, consider the error of location, and need to guarantee through welding that because borehole accuracy is not high, above-mentioned lower limit can satisfy the position error of the insertion portion of bore error and U type pipe in this hole basically in addition; The upper limit then is at the end value that reduces weld seam that guarantees under the through welding situation as far as possible.The welding here relates to except that second solder joint 5 between the U type pipe group 8 and the person in charge 4 and temperature tube 1 and second solder joint 2 between being responsible for.
The welding of employing flame, i.e. the gas welding of often saying, welding temperature is low, is fit to the welding of thin-wall part.
Here mention the bending lumber recovery, said aluminium section bar preferably the tensile strength in the time of 25 ℃ at the aluminium alloy of aluminium alloy 145～160MPa of 130～183MPa, in this interval, its bending lumber recovery can reach the bending lumber recovery of the copper shapes that is applied in now on the adjuster basically.
Tubing the inside at above-mentioned aluminium alloy, a kind of 3003 series alloys are arranged, the tensile strength of this kind aluminium alloy is about 150MPa, has toughness and ductility preferably, buckling performance is relatively good, through experimental verification, organize more bending lumber recovery experimental result the poorest also have 94.7, best one group has then reached 97.1%.Certainly, bending experiment also has a lot of human factors and enchancement factor, the bending experiment under similarity condition, and it is little that above-mentioned aluminium alloy extrusions and copper shapes are compared difference, and the bending lumber recovery has all reached industrial application requirements.
Because welding temperature is higher, carry out real-time thermometric so also comprise the employing infrared radiation thermometer in the technology of said control welding temperature, so that the temperature control parameter to be provided, temperature measuring device needn't contact with tested zone, also is convenient to real-time control.
Consider that the bearing capacity of certain situation lower pipeline has relatively high expectations, the described adjuster U-shaped pipe that has adopted aluminum alloy material and be responsible for thickness with respect to position copper pipe thickening 30%, can satisfy system, so that and existing solar thermal collection system compatibility with higher bearing requirements.On the other hand, consider installation after, the stretcher strain phenomenon can appear in the horn mouth of aluminium-alloy pipe, slight vibrations can appear in complete machine in heating process, the service life that thickening also is to guarantee heat collector to aluminium-alloy pipe.Even and if the thickening aluminium-alloy pipe, than adopting copper pipeline, cost is relative also lower.
For ease of welding, before the welding, will be responsible for and fix, and make making progress of its preboring corresponding to U type pipe group patchhole; U type pipe group interface is poured into corresponding inserting in the hole, and the axiality that guarantees respective socket and respective aperture is less than φ 0.01mm, and clamping.The location of two weldments before the above-mentioned welding adopts existing solar heat collector adjuster welding tooling anchor clamps to satisfy.Coaxiality error above guaranteeing is so that even weld.
Claims (6)
1. the application of aluminium-alloy pipe on metal vacuum pipe solar heat collector regulator, it comprises following technology:
Tensile strength when being chosen in 25 ℃ is at the aluminium alloy of 130～183MPa, and employing
Welding procedure, the adjustment weld gap is 0.05～0.15mm, adopts the flame welding, and the control welding temperature is at 420 ℃～480 ℃; And
Anticorrosion, solar energy plant and the pipeline connecting parts of leaking water that is communicated with adjuster adopt the aluminum alloy material connector.
2. the application of aluminium-alloy pipe according to claim 1 on metal vacuum pipe solar heat collector regulator, said aluminium section bar preferably the tensile strength in the time of 25 ℃ at the aluminium alloy of aluminium alloy 145～160MPa of 130～183MPa.
3. the application of aluminium-alloy pipe according to claim 2 on metal vacuum pipe solar heat collector regulator, said aluminum alloy materials adopts 3003 series alloys.
4. the application of aluminium-alloy pipe according to claim 1 on metal vacuum pipe solar heat collector regulator also comprises in the technology of said control welding temperature and adopts infrared radiation thermometer to carry out real-time thermometric, so that the temperature control parameter to be provided.
5. according to the application of the described aluminium-alloy pipe of one of claim 1 to 4 on metal vacuum pipe solar heat collector regulator, it is characterized in that: the described adjuster U-shaped pipe that has adopted aluminum alloy material and be responsible for thickness with respect to position copper pipe thickening 30%.
6. the application of aluminium-alloy pipe according to claim 5 on metal vacuum pipe solar heat collector regulator is characterized in that: before the welding, will be responsible for and fix, and make making progress corresponding to U type pipe group patchhole of its preboring; U type pipe group interface is poured into corresponding inserting in the hole, and the axiality that guarantees respective socket and respective aperture is less than φ 0.01mm, and clamping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100028985A CN101487636B (en) | 2009-01-23 | 2009-01-23 | Use of aluminum alloy pipe in metal vacuum pipe solar heat collector regulator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100028985A CN101487636B (en) | 2009-01-23 | 2009-01-23 | Use of aluminum alloy pipe in metal vacuum pipe solar heat collector regulator |
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| Publication Number | Publication Date |
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| CN101487636A true CN101487636A (en) | 2009-07-22 |
| CN101487636B CN101487636B (en) | 2010-07-28 |
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| CN2009100028985A Active CN101487636B (en) | 2009-01-23 | 2009-01-23 | Use of aluminum alloy pipe in metal vacuum pipe solar heat collector regulator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105605800A (en) * | 2016-02-25 | 2016-05-25 | 大连希奥特阳光能源科技有限公司 | High-capacity U-shaped channel evacuated tube collector |
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2009
- 2009-01-23 CN CN2009100028985A patent/CN101487636B/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105605800A (en) * | 2016-02-25 | 2016-05-25 | 大连希奥特阳光能源科技有限公司 | High-capacity U-shaped channel evacuated tube collector |
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| CN101487636B (en) | 2010-07-28 |
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