CN1558163A - Full-glass vacuum solar heat collection tube and manufacturing technology thereof - Google Patents
Full-glass vacuum solar heat collection tube and manufacturing technology thereof Download PDFInfo
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- CN1558163A CN1558163A CNA2004100394090A CN200410039409A CN1558163A CN 1558163 A CN1558163 A CN 1558163A CN A2004100394090 A CNA2004100394090 A CN A2004100394090A CN 200410039409 A CN200410039409 A CN 200410039409A CN 1558163 A CN1558163 A CN 1558163A
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Abstract
The present invention discloses one kind of novel all-glass vacuum solar heat collecting tube and its manufacture process. The vacuum solar heat collecting tube includes inner and outer glass tube with two end ring sealed, and features that at least one end is specially shaped end comprising inner and outer tubes, rotary deformed transition section and short tube and with at least one thin-wall transition part easy to deform elastically. During the manufacture process, the ring hole in some end between the inner and the outer tubes is used in vacuum deairing and vacuum sealing before being processed into the tube mouth. There are no special deairing tube and no conic sealing joint. The present invention has simple structure, easy manufacture and low damage probability, and may be used widely in various kinds of solar water heater.
Description
Technical field
The present invention relates to a kind of complete glass vacuum sun thermal-collecting tube of solar vacuum tube collector and vacuum tube solar water-heater/system, especially straight through type all glass vacuum solar collector pipe of being used for.
The present invention also relates to above-mentioned complete glass vacuum sun thermal-collecting tube, the especially manufacturing process of straight through type all glass vacuum solar collector pipe simultaneously.
Background technology
20th century the mid-1970s, U.S. Ovens-Yi Linuo Si (Owens Illinois) company has at first developed complete glass vacuum sun thermal-collecting tube, and (this manages an end opening; For ease of difference, this paper tentatively is referred to as traditional complete glass vacuum sun thermal-collecting tube).
China develops complete glass vacuum sun thermal-collecting tube since the end of the seventies on the basis of introducing U.S.'s vacuum heat collection pipe.The eighties, the R﹠D institution that with the Tsing-Hua University is representative cooperates with Beijing North vacuum film Industrial Co., Ltd, the thermal-collecting tube selective absorbing film fruitful research and production have been carried out, professors Yin Zhiqiang etc. have carried out significant improvement to film technique and technology again, under the concern and support of the parties concerned, this technology is used to produce in batches very soon and numerous manufacturers promote in the whole nation, thereby the complete glass vacuum sun thermal-collecting tube that China is produced was reached advanced world standards in very short time, and became the country of volume of production and marketing maximum in the world.At present, on the market with the complete glass vacuum sun thermal-collecting tube (being commonly called as " vacuum tube ") of solar water heater's mass selling, be exactly traditional thermal-collecting tube of a this end opening.
It is said, be born and the progressively perfect initial stage, just have the people once to attempt to make the complete glass vacuum sun thermal-collecting tube (straight through type all glass vacuum solar collector pipe) of both ends open at this traditional thermal-collecting tube; Yet because this thermal-collecting tube needs the two ends sealing-in, the back that is heated is because of inner and outer pipe expands inconsistent (interior tube swelling amount is big, and the outer tube swell increment is little), is easy to generate thermal stress and " bombing " phenomenon occurs, so success.In view of the complete glass vacuum sun thermal-collecting tube of having succeeded in developing having satisfied people's needs at that time to a great extent, so the development work of straight through type all glass vacuum solar collector pipe is also shelved by people.
In recent years, along with China's living standards of the people improve constantly and the solar water heater produces continuous development with application technology, increasing people progressively recognizes the solar water heater and builds that to combine be the inexorable trend of future development; Traditional complete glass vacuum sun thermal-collecting tube obviously can not satisfy people's this new needs.So, remove and to make improvements, or adopt outside the heat collector of other types, there is the people then to expect the straight through type all glass vacuum solar collector pipe of both ends open, and with its research topic as oneself.
For example, Chinese patent specification ZL01276216.4 has just mentioned the vacuum tube of both ends open.Although the interior tube-surface of this pipe is band coating (it is as the photo-thermal transfer medium with the carbon pearl in the pipe) not, is not straight through type all glass vacuum solar collector pipe truly.But it has structurally realized the breakthrough to traditional complete glass vacuum sun thermal-collecting tube.
And for example, Chinese patent specification ZL02208082.1 disclosed " a kind of solar thermal collector that can be used for the circular form water heater " just comprises a kind of straight through type all glass vacuum solar collector pipe.This pipe is made up of the glass tube that two spiders are fitted together, and inner tube outer surface is attached with coating for selective absorption, the direct ring seal in two ends together, interlayer is vacuum state.Can but, the designer enters trial-production just discovery soon just: further improve its heat shock resistance temperature and now become the key (the heat shock resistance temperature is low, illustrates that its suitable region is narrow, is difficult to form commodity) that can this pipe introduce to the market.
For another example, Chinese patent application specification (application number: 03250427.6) " a kind of straight through type all glass vacuum solar collector pipe " that has just proposed to do much research on and be worth.The feature of this pipe is that pipe one or both ends have bellows segment in it.Yet, minimum although this structure can be slowed down the generation of thermal stress because of its unit deformation amount, gather and imitate the length that certainly will will increase bellows segment; Bring certain difficulty will for like this manufacturing of this pipe: the one, be difficult to be shaped, the 2nd, be difficult to annealing.Simultaneously, also can increase corresponding work amount and production cost.Moreover if adopt traditional vacuum seal technology, this pipe also will be provided with technological blast pipe specially, also will stay next cone shape sealing-in knot (the glass entity that forms behind the Vacuum exhaust tube sealing by fusing) behind its sealing by fusing.So just will inevitably bring four problems: the one, the existence of sealing-in knot causes that easily stress is concentrated; The 2nd, in transportation and installation process, break easily; The 3rd, blast pipe the comparison difficulty is set; The 4th, increased manufacturing process and production cost.
Summary of the invention
The objective of the invention is to overcome the above-mentioned deficiency of prior art, a kind of novel complete glass vacuum sun thermal-collecting tube is provided, promptly have the straight through type all glass vacuum solar collector pipe of new construction.This manages not only heat shock resistance temperature height, can more effectively avoid " bombing ", and simple in structure, is easy to make.
Simultaneously, the present invention also aims to break through traditional vacuum seal technology, a kind of new manufacturing process of producing complete glass vacuum sun thermal-collecting tube, especially straight through type all glass vacuum solar collector pipe is provided.
For achieving the above object, the present invention has done two to existing straight through type all glass vacuum solar collector pipe and has obviously improved: the one, and be not provided with and be specifically designed to the manufacturability blast pipe that carries out vacuum exhaust; The 2nd, change special-shaped end into following structure to major general's one end:
For inner and outer pipe, its special-shaped end is connected in sequence by pipe shaft and one section jatharapanvartanasana reducing changeover portion, one section short tube of constituting its main body;
Constitute the jatharapanvartanasana reducing changeover portion of inner and outer pipe special-shaped end, have at least a band to have annular plane structure among both or/and the thin-walled transition portion of annular non-arch curved-surface structure;
The short tube that constitutes interior pipe special-shaped end inserts among the short tube that constitutes outer tube special-shaped end, and it is roughly concordant that the two short tube mouths of pipe keep, and all maintains proportional spacing between each counterpart (pipe shaft, jatharapanvartanasana reducing changeover portion, short tube) of formation inner and outer pipe special-shaped end; For keeping the radial spacing of above-mentioned each counterpart better, the short tube that constitutes outer tube special-shaped end can be roughly the corrugated supporting section of sealing with the cross section.
The interior pipe special-shaped end and the outer tube special-shaped end that possess above attribute become as a whole after two short tube mouth of pipe sealing-ins.Need to prove that herein all in the thermal-collecting tube two ends do not possess above special-shaped end whole attributes, is non-special-shaped end.
With perfect, the pipe shaft that constitutes the inner and outer pipe main body is connected with the rounding off that is connected to of jatharapanvartanasana reducing changeover portion, short tube as a further improvement on the present invention.Because can reduce stress like this concentrates.
For first improvement in above-mentioned two improvement come true, manufacturing process of the present invention also has its distinguishing feature:
The one, in the vacuum exhaust operation, it or not manufacturability blast pipe with special setting, but take measures, with the looping pit between a certain end inner and outer pipe of thermal-collecting tube (comprising looping pit between special-shaped end two short tubes and the looping pit between the non-special-shaped end inner and outer pipe), the double as blast pipe carries out vacuum exhaust.
The 2nd, in the vacuum seal operation, not with the direct object of technological blast pipe as sealing-in, but with the direct object of the looping pit between the above-mentioned inner and outer pipe as sealing-in; Ring-type is become in the sealing-in that forms after its sealing-in, and the mouth of pipe that this ring-type entity finally is processed to thermal-collecting tube special-shaped end or non-special-shaped end does not retain the cone shape sealing-in knot that forms because of arts demand one by one on thermal-collecting tube.
Owing to have a special-shaped end at least in the straight through type all glass vacuum solar collector pipe of the present invention two ends, and this end has at least a jatharapanvartanasana reducing changeover portion band to have annular plane structure or/and the thin-walled transition portion of annular non-arch curved-surface structure (with above-mentioned in pipe with bellows segment compare, this structure more is easy to generate strain); As long as its shape is carried out suitably preferred, and thickness is suitably thinner, size is suitably big, (this deflection is big more will to produce the elastic deformation amount who is enough to counteracting initiation thermal-collecting tube " bombing ", just be not easy " bombing " more), thus " bombing " problem of this thermal-collecting tube solved on the structure more up hill and dale.
More outstanding is, because straight through type all glass vacuum solar collector pipe of the present invention is not established technological blast pipe, so structure is greatly simplified on the whole, and the also corresponding minimizing of manufacturing process, thereby can reduce investment outlay, reduce cost; Moreover because there is not cone shape sealing-in knot in this thermal-collecting tube, so the possibility that is broken greatly reduces, this just provides advantage for transportation, I﹠M.
Description of drawings
Figure of description of the present invention amounts to 14 width of cloth.
Fig. 1～3 are the overall structure schematic diagram of straight through type all glass vacuum solar collector pipe of the present invention, and wherein Fig. 2 is a preferred embodiment.In Fig. 1, the thermal-collecting tube two ends are the special-shaped end; In Fig. 2 and Fig. 3, the thermal-collecting tube right-hand member is the special-shaped end, and left end is non-special-shaped end.
Fig. 4～7 are partial structurtes of the present invention---the structural representation of several different special-shaped ends.Because the structural shape difference of special-shaped end, the quantity difference that is combined are so can be combined into the thermal-collecting tube of many kinds of different types.
Fig. 8 and Fig. 9 are the H-H cutaway view among Fig. 3, and what illustrate is the shape of the looping pit between special-shaped end two short tubes.Short tube (dotted line among Fig. 3) the band supporting section of the outer tube special-shaped end that is dissectd among Fig. 8; The short tube (solid line among Fig. 3) of the outer tube special-shaped end that is dissectd among Fig. 9 is not with supporting section.
Figure 10 is the H '-H ' cutaway view among Fig. 3, and what illustrate is the shape of the looping pit between the non-special-shaped end inner and outer pipe.
Figure 11～14 method of operating the schematic diagrames that carry out vacuum exhaust and vacuum seal for production of the present invention straight through type all glass vacuum solar collector pipe shown in Fig. 1～10.In Figure 11 and Figure 12, be that the direct object with looping pit double as blast pipe between special-shaped end two short tubes and sealing-in carries out vacuum exhaust and vacuum seal.In Figure 13 and Figure 14, be to carry out vacuum exhaust and vacuum seal with the looping pit double as blast pipe between the non-special-shaped end inner and outer pipe and the direct object of sealing-in.
The specific embodiment
Below in conjunction with Figure of description and preferred embodiment, the present invention is described in more detail.
Shown in Fig. 1～3, the composition of straight through type all glass vacuum solar collector pipe of the present invention comprises outer glass pipe 1 and inner glass tube 2; Outer glass pipe 1 is a transparent glass tube, and inner glass tube 2 outer surfaces are attached with selectivity sun absorber coatings, and perhaps whole Zhi Guanzi directly makes with antisolar glass; Inner and outer pipe forms the tube chamber of both ends open along mouth of pipe ring seal together; Interlayer between two pipes is vacuum state through exhaust; In order to improve its vacuum, but the supporting member 3 of mounting strap getter in the interlayer.
It is characterized in that: having an end in the above-mentioned thermal-collecting tube two ends at least is the special-shaped end (example is seen Fig. 4～7) with following structure:
For outer glass pipe 1, its special-shaped end is connected in sequence by the pipe shaft S that constitutes outer glass pipe 1 main body and jatharapanvartanasana reducing changeover portion G, short tube D; Short tube D is coaxial with pipe shaft S; When short tube D equates with the external diameter of pipe shaft S, then as special case---the special-shaped end can not taken back changes deformation footpath changeover portion G, short tube D, and directly replace (outer tube of special-shaped end, its jatharapanvartanasana reducing changeover portion G, short tube D promptly directly replace with pipe shaft S) as shown in Figure 4 with pipe shaft S.
For inner glass tube 2, its special-shaped end is connected in sequence by the pipe shaft S ' that constitutes inner glass tube 2 main bodys and jatharapanvartanasana reducing changeover portion G ', short tube D '; Short tube D ' is coaxial with pipe shaft S '; When short tube D ' equates with the external diameter of pipe shaft S ', then as special case---the special-shaped end can not taken back changes deformation footpath changeover portion G ', short tube D ', and directly replace (the interior pipe of special-shaped end, its jatharapanvartanasana reducing is crossed the section of tiding over G ', short tube D ' and promptly directly replaced with pipe shaft S ') as shown in Figure 5 with pipe shaft S '.
Constitute the jatharapanvartanasana reducing changeover portion G and the G ' of inner and outer pipe special-shaped end, have at least a band to have annular plane structure among both or/and the thin-walled transition portion B or the B ' of annular non-arch curved-surface structure.
For example, in special-shaped end shown in Figure 4, the jatharapanvartanasana reducing changeover portion G ' of pipe special-shaped end just is with the thin-walled transition portion B ' with annular plane structure in constituting.In special-shaped end shown in Figure 5, the jatharapanvartanasana reducing changeover portion G that constitutes outer tube special-shaped end just is with the thin-walled transition portion B with annular non-arch curved-surface structure.In special-shaped end shown in Figure 6, the jatharapanvartanasana reducing changeover portion G that constitutes outer tube special-shaped end just is with the thin-walled transition portion B with annular non-arch curved-surface structure, and the jatharapanvartanasana reducing changeover portion G ' of pipe special-shaped end just is with the thin-walled transition portion B ' with annular plane structure and annular non-arch curved-surface structure in constituting.In special-shaped end shown in Figure 7, the jatharapanvartanasana reducing changeover portion G that constitutes outer tube special-shaped end just is with the thin-walled transition portion B with annular plane structure and annular non-arch curved-surface structure, and the interior pipe of formation special-shaped end, although seem very similar to other special-shaped ends, but it be have annular arch curved-surface structure (comprising solid line and the shown annular arch curved-surface structure of dotted line among Fig. 7) reducing transition portion F---this kind structure is strong because of anti-lotus ability, be difficult for producing strain, so can not be as the structural element that constitutes special-shaped end jatharapanvartanasana reducing changeover portion.Except that this annular arch curved-surface structure, other annular surface structures are annular non-arch curved-surface structure, all can be used as the structural element that constitutes special-shaped end jatharapanvartanasana reducing changeover portion.
Short tube D ' the insertion of pipe special-shaped end constitutes among the short tube D of outer tube special-shaped end in constituting, it is roughly concordant that the two short tube mouths of pipe keep, and constitute between each counterpart of inner and outer pipe special-shaped end, be between pipe shaft S and the S ', between jatharapanvartanasana reducing changeover portion G and the G ', between short tube D and the D ', maintain proportional spacing respectively.As improvement, short tube D can be roughly the corrugated supporting section Z (seeing Fig. 3 and Fig. 8 for details) of sealing with the cross section.
The inner and outer pipe special-shaped end that possesses above special-shaped end attribute forms a complete special-shaped end after the mouth of pipe sealing-in of two short tube D and D '.
The preferred embodiments of the present invention is characterized in that as shown in Figure 2:
The one end is the special-shaped end, and constitute inner and outer pipe special-shaped end short tube external diameter less than with the external diameter of its pipe shaft that is connected by jatharapanvartanasana reducing changeover portion;
Its other end is non-special-shaped end, and this end is formed by the direct ring seal of the pipe shaft that constitutes the inner and outer pipe main body.
Why adopting this version, is strong because of the applicability of the straight through type all glass vacuum solar collector pipe with this architectural feature, and simple in structure, easily manufactured.As its special-shaped end (osculum end) is placed top, then being fit to the solar vacuum tube collector that assembling is directly used in Natural Circulation and forced circulation---the split type vacuum tube solar water-heater be made up of this heat collector is easier to combine with building.As its special-shaped end (osculum end) is placed the bottom, and the mouth of pipe that will hold stops up, and also can be used for whole direct insertion vacuum tube solar water-heater; Moreover, if the mouth of pipe that will hold is linked together with union pipe, then not only is convenient to the antiscale scrubbing, and is convenient to evacuation and anti-freezing.Certainly, above-mentioned special-shaped end is the osculum end internal diameter should the mobile of water be not prerequisite in the thermal-collecting tube not influence substantially.
In conjunction with Figure of description the specific embodiment of straight through type all glass vacuum solar collector pipe of the present invention has been carried out exemplary explanation above.Obviously, the present invention is not limited thereto, and the various combinations and the remodeling that carry out within the scope of the present invention all do not exceed protection scope of the present invention.
The present invention produces complete glass vacuum sun thermal-collecting tube, the especially manufacturing process of straight through type all glass vacuum solar collector pipe shown in Fig. 1～10, comprising:
(a) manufacturing of outer glass pipe 1: its technical process comprises pipe cutting; Burn mouth; System special-shaped end and prolongation thereof; Clean; Oven dry;
(b) manufacturing of inner glass tube 2: its technical process comprises pipe cutting; Burn mouth; System special-shaped end and prolongation thereof; Clean; Oven dry; Plated coating (carrying out when needing);
(c) inner and outer pipe suit; The supporting member 3 of mounting strap getter (carrying out when thermal-collecting tube contains this part) in passing;
(d) vacuum exhaust and vacuum seal; Getter (carrying out when needing) evapotranspires;
It is characterized in that:
(e) in the vacuum exhaust operation, not manufacturability blast pipe, but carry out vacuum exhaust with the looping pit between a certain end inner and outer pipe of thermal-collecting tube (comprise looping pit K between special-shaped end two short tubes and the looping pit K ' between the non-special-shaped end inner and outer pipe---containing not is looping pit K ' between the inner and outer pipe that directly is made of pipe shaft) double as blast pipe with special setting;
---if carry out vacuum exhaust with the looping pit K double as blast pipe between special-shaped end two short tube D and the D ', its concrete grammar such as Figure 11 and (horizontal arrow direction is a discharge directions among the figure) shown in Figure 12:
Under the good prerequisite of the non-special-shaped end of thermal-collecting tube or another special-shaped end sealing-in, the pore of inner glass tube 2 is carried out that plug for seal is handled or connects the tail end of short tube D ' prolongation is heat-sealable in advance, and the glass tube that prolongation and the vacuum exhaust platform of short tube D is used for exhaust is welded together, start vavuum pump then, can realize vacuum exhaust;
Align welding for ease of above-mentioned two pipes, the prolongation of short tube D can carry out reducing processing in advance, and the mouth of pipe size that makes the mouth of pipe size of short tube D prolongation and the used glass tube of vacuum exhaust platform about equally;
---if carry out vacuum exhaust with the looping pit K ' double as blast pipe between the non-special-shaped end inner and outer pipe, its concrete grammar such as Figure 13 and (horizontal arrow direction is a discharge directions among the figure) shown in Figure 14:
Under the good prerequisite of thermal-collecting tube special-shaped end sealing-in, the pore of inner glass tube 2 is carried out that plug for seal is handled or in advance with heat-sealable the connecting of tail end of inner glass tube 2 prolongations, and the glass tube that the prolongation and the vacuum exhaust platform of outer glass pipe 1 is used for exhaust is welded together, start vavuum pump then, can realize vacuum exhaust;
Align welding for ease of above-mentioned two pipes, the prolongation of outer glass pipe 1 can carry out reducing processing equally in advance;
(f) in the vacuum seal operation, not with the direct object of technological blast pipe as sealing-in, but with the direct object of the looping pit between a certain end inner and outer pipe of the thermal-collecting tube of double as blast pipe in the vacuum exhaust operation as sealing-in; Ring-type is become in the sealing-in that forms after its sealing-in, and this ring-type entity finally is processed to the mouth of pipe of thermal-collecting tube special-shaped end or non-special-shaped end;
Its concrete grammar is:
Meet the requirements of under the prerequisite in vacuum exhaust operation vacuum, adopt one of following two kinds of methods, with the looping pit between a certain end inner and outer pipe of the thermal-collecting tube of double as blast pipe together along the circumference sealing by fusing, the prolongation that to hold at last, be that the prolongation of special-shaped end two short tube D and D ' or the prolongation of non-special-shaped end inner and outer pipe are removed in the lump as fifth wheel, and be that the mouth of pipe of special-shaped end or non-special-shaped end carries out preliminary hot shaping processing and corresponding annealing in process the ring-type sealing-in of remainder knot;
Direct heat sealing by fusing connection:
As Figure 11 and shown in Figure 13, evenly heat along the sealed portion of circumference special-shaped end two short tube D and D ' prolongation or non-special-shaped end inner and outer pipe prolongation, under the effect of atmospheric pressure, the pipe that is in the outside closes up voluntarily, further heating makes sealed portion be molten condition again, can make the looping pit between two pipes realize the hot melt sealing-in;
Indirect hot melting sealing-in method:
As Figure 12 and shown in Figure 14, earlier together, and then adopt said method with the prolongation sealing by fusing of the prolongation of special-shaped end short tube D or non-special-shaped end outer glass pipe 1, make the looping pit between two pipes realize the hot melt sealing-in.
In fact, indirect hot melting sealing-in method is the further improvement to direct heat sealing by fusing connection, because " direct method " is subjected to the fixed constraints that the vacuum exhaust platform is used for the glass tube of exhaust, can only adopt the method for rotation blowtorch, be what be difficult to realize the even heating of sealed portion like this; And " indirect method ", because of in advance together with the prolongation sealing by fusing of the prolongation of special-shaped end short tube D or non-special-shaped end outer glass pipe 1, that is to say that thermal-collecting tube has broken away from the constraint that the vacuum exhaust platform is used for the glass tube of exhaust, evenly heating (rotation thermal-collecting tube) again on glass work lathe then is unusual nothing the matter.
As the further improvement of manufacturing process of the present invention and perfect, in the manufacture process of inner and outer pipe, for the external diameter that makes the short tube that constitutes inner and outer pipe special-shaped end less than with the external diameter of its pipe shaft that is connected by jatharapanvartanasana reducing changeover portion, needed short tube and prolongation thereof adopt welding method welding (welding) to get on.
Realize that with jatharapanvartanasana reducing changeover portion, short tube rounding off is connected for making the pipe shaft that constitutes the inner and outer pipe main body, but needed special-shaped end---band portion short tube or whole short tube and prolongation thereof adopt artificial moulding or/and mechanical forming method's integral body processes.
For improving the Forming Quality of the thermal-collecting tube mouth of pipe, on the basis of finishing the heat-collecting pipe vacuum sealing-in, can increase hot trimming together---its purpose is further the mouth of pipe that forms after the sealing-in to be carried out hot shaping processing and corresponding annealing in process, makes it slick and sly, regular more.
Need to prove at last, vacuum exhaust of being adopted in the manufacturing process of the present invention and vacuum seal method---tentatively be referred to as " annular distance hot melt vacuum seal connection " or " annular distance hot melt vacuum seal technology ", it is not only applicable to complete glass vacuum sun thermal-collecting tube, the especially manufacturing of straight through type all glass vacuum solar collector pipe, and is applicable to other manufacturings with the vacuum interlayer container of inside and outside glass tube.The size (comprising thickness) that but it is pointed out that the looping pit that is used for exhaust and sealing-in is more little, just easy more realization hot melt sealing-in.If the size of above-mentioned looping pit is bigger, the heat resistance of used glass is relatively poor, perhaps because of there is bigger thermal stress in the improper matrix of heat treatment itself, then occurs the phenomenon that bursts of sealed portion so easily when sealing-in.For this point, in actual mechanical process, still should attract great attention and take corresponding measure to be improved and take precautions against.
Claims (7)
1, a kind of complete glass vacuum sun thermal-collecting tube, its composition comprise and being sleeved on together and coaxial inside and outside glass tube; Outer glass pipe (1) is a transparent glass tube, and inner glass tube (2) outer surface is attached with selectivity sun absorber coatings, and perhaps whole Zhi Guanzi directly makes with antisolar glass; The inner and outer pipe two ends form the tube chamber of both ends open along mouth of pipe ring seal together; Interlayer between two pipes is vacuum state through exhaust; But the supporting member of mounting strap getter (3) in its interlayer;
It is characterized in that: having an end in the above-mentioned thermal-collecting tube two ends at least is the special-shaped end with following structure:
For outer glass pipe (1), its special-shaped end is connected in sequence by the pipe shaft (S) that constitutes outer glass pipe (1) main body and jatharapanvartanasana reducing changeover portion (G), short tube (D); Short tube (D) is coaxial with pipe shaft (S); When short tube (D) equates with the external diameter of pipe shaft (S), then as special case---the special-shaped end can not taken back changes deformation footpath changeover portion (G), short tube (D), and directly replaces with pipe shaft (S);
For inner glass tube (2), its special-shaped end is connected in sequence by the pipe shaft (S ') that constitutes inner glass tube (2) main body and jatharapanvartanasana reducing changeover portion (G '), short tube (D '); Short tube (D ') is coaxial with pipe shaft (S '); When short tube (D ') equates with the external diameter of pipe shaft (S '), then as special case---the special-shaped end can not taken back changes deformation footpath changeover portion (G '), short tube (D '), and directly replaces with pipe shaft (S '); Constitute the jatharapanvartanasana reducing changeover portion (G, G ') of inner and outer pipe special-shaped end, have at least a band to have annular plane structure among both or/and the thin-walled transition portion of annular non-arch curved-surface structure;
The short tube (D ') of pipe special-shaped end inserts in the short tube (D) that constitutes outer tube special-shaped end in constituting, it is roughly concordant that the two short tube mouths of pipe keep, and constitute between each counterpart of inner and outer pipe special-shaped end, be between the pipe shaft (S, S '), between the jatharapanvartanasana reducing changeover portion (G, G '), between the short tube (D, D '), maintain proportional spacing respectively; Short tube (D) can be roughly the corrugated supporting section (Z) of sealing with the cross section;
Possess the inner and outer pipe special-shaped end of above attribute, after the mouth of pipe sealing-in of short tube (D, D '), realize ring seal, thereby constitute a complete special-shaped end.
2, complete glass vacuum sun thermal-collecting tube as claimed in claim 1 is characterized in that:
The one end is the special-shaped end, and constitute inner and outer pipe special-shaped end short tube external diameter less than with the external diameter of its pipe shaft that is connected by jatharapanvartanasana reducing changeover portion;
Its other end is non-special-shaped end, and this end is formed by the direct ring seal of the pipe shaft that constitutes the inner and outer pipe main body.
3, complete glass vacuum sun thermal-collecting tube as claimed in claim 1 or 2 is characterized in that: the pipe shaft that constitutes the inner and outer pipe main body is connected with the rounding off that is connected to of jatharapanvartanasana reducing changeover portion, short tube.
4, a kind of manufacturing process of producing complete glass vacuum sun thermal-collecting tube as claimed in claim 1 comprises:
(a) manufacturing of outer glass pipe (1): its technical process comprises pipe cutting; Burn mouth; System special-shaped end and prolongation thereof; Clean; Oven dry;
(b) manufacturing of inner glass tube (2): its technical process comprises pipe cutting; Burn mouth; System special-shaped end and prolongation thereof; Clean; Oven dry;
(c) inner and outer pipe suit;
(d) vacuum exhaust and vacuum seal;
It is characterized in that:
(e) in the vacuum exhaust operation, it or not manufacturability blast pipe with special setting, but with the looping pit between a certain end inner and outer pipe of thermal-collecting tube---comprise looping pit (K) between special-shaped end two short tubes and the looping pit (K ') between the non-special-shaped end inner and outer pipe, the double as blast pipe carries out vacuum exhaust;
---if carry out vacuum exhaust with looping pit (K) the double as blast pipe between special-shaped end two short tubes (D, D '), its concrete grammar is:
Under the good prerequisite of the non-special-shaped end of thermal-collecting tube or another special-shaped end sealing-in, the pore of inner glass tube (2) is carried out encapsulation process or in advance with heat-sealable the connecting of tail end of short tube (D ') prolongation, and the glass tube that the prolongation and the vacuum exhaust platform of short tube (D) is used for exhaust is welded together, start vavuum pump then, can realize vacuum exhaust;
Align welding for ease of above-mentioned two pipes, the prolongation of short tube (D) can carry out reducing processing in advance, and the mouth of pipe size that makes the mouth of pipe size of short tube (D) prolongation and the used glass tube of vacuum exhaust platform about equally;
---if carry out vacuum exhaust with looping pit (K ') the double as blast pipe between the non-special-shaped end inner and outer pipe, its concrete grammar is:
Under the good prerequisite of thermal-collecting tube special-shaped end sealing-in, the pore of inner glass tube (2) is carried out encapsulation process or in advance with heat-sealable the connecting of tail end of inner glass tube (2) prolongation, and the glass tube that the prolongation and the vacuum exhaust platform of outer glass pipe (1) is used for exhaust is welded together, start vavuum pump then, can realize vacuum exhaust;
Align welding for ease of above-mentioned two pipes, the prolongation of outer glass pipe (1) can carry out reducing processing equally in advance;
(f) in the vacuum seal operation, not with the direct object of technological blast pipe as sealing-in, but with the direct object of the looping pit between the inner and outer pipe of double as blast pipe in the vacuum exhaust operation as sealing-in; Ring-type is become in the sealing-in that forms after its sealing-in, and this ring-type entity finally is processed to the mouth of pipe of thermal-collecting tube special-shaped end or non-special-shaped end;
Its concrete grammar is:
Meet the requirements of under the prerequisite in vacuum exhaust operation vacuum, adopt one of following two kinds of methods, with the looping pit between a certain end inner and outer pipe of the thermal-collecting tube of double as blast pipe together along the circumference sealing by fusing, the prolongation that to hold at last, be that the prolongation of special-shaped end two short tubes (D, D ') or the prolongation of non-special-shaped end inner and outer pipe are removed in the lump as fifth wheel, and be that the mouth of pipe of special-shaped end or non-special-shaped end carries out preliminary hot shaping processing and corresponding annealing in process the ring-type sealing-in of remainder knot;
Direct heat sealing by fusing connection:
Evenly heat along the sealed portion of circumference special-shaped end two short tubes (D, D ') prolongation or non-special-shaped end inner and outer pipe prolongation, under the effect of atmospheric pressure, the pipe that is in the outside closes up voluntarily, further heating makes sealed portion be molten condition again, can make the looping pit between two pipes realize the hot melt sealing-in;
Indirect hot melting sealing-in method:
Earlier together, and then adopt said method, make the looping pit between two pipes realize the hot melt sealing-in the prolongation sealing by fusing of the prolongation of special-shaped end short tube (D) or non-special-shaped end outer glass pipe (1).
5, the manufacturing process of complete glass vacuum sun thermal-collecting tube as claimed in claim 4, it is characterized in that: in the manufacture process of inner and outer pipe, for the external diameter that makes the short tube that constitutes inner and outer pipe special-shaped end less than with the external diameter of its pipe shaft that is connected by jatharapanvartanasana reducing changeover portion, needed short tube and prolongation thereof adopt welding method to weld up.
6, the manufacturing process of complete glass vacuum sun thermal-collecting tube as claimed in claim 4, it is characterized in that: in the manufacture process of inner and outer pipe, realize that with jatharapanvartanasana reducing changeover portion, short tube rounding off is connected for making the pipe shaft that constitutes the inner and outer pipe main body, but needed special-shaped end---band portion short tube or whole short tube and prolongation thereof adopt artificial moulding or/and mechanical forming method's integral body processes.
7, as the manufacturing process of claim 4,5 or 6 described complete glass vacuum sun thermal-collecting tubes, it is characterized in that: on the basis of finishing the heat-collecting pipe vacuum sealing-in, increasing has hot trimming---and further the mouth of pipe that forms after the sealing-in is carried out hot shaping processing and corresponding annealing in process, make it slick and sly, regular more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100394090A CN1558163A (en) | 2004-01-28 | 2004-01-28 | Full-glass vacuum solar heat collection tube and manufacturing technology thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100394090A CN1558163A (en) | 2004-01-28 | 2004-01-28 | Full-glass vacuum solar heat collection tube and manufacturing technology thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1558163A true CN1558163A (en) | 2004-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004100394090A Pending CN1558163A (en) | 2004-01-28 | 2004-01-28 | Full-glass vacuum solar heat collection tube and manufacturing technology thereof |
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| Country | Link |
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| CN (1) | CN1558163A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103307788A (en) * | 2013-04-23 | 2013-09-18 | 中国科学院广州能源研究所 | Solar heat collecting pipe venting equipment without tail pipe |
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| CN104136385A (en) * | 2011-12-23 | 2014-11-05 | 洛尔等离子技术有限公司 | Method and device for producing vacuum tubes for solar thermal installations |
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| CN109534667A (en) * | 2018-12-20 | 2019-03-29 | 沧州天瑞星光热技术有限公司 | A kind of device and method being connect for vacuum gauge with collector tube glass outer tube |
| CN109534667B (en) * | 2018-12-20 | 2024-03-05 | 北京天瑞星光热技术有限公司 | Device and method for connecting vacuum gauge pipe with heat collecting pipe glass outer pipe |
| CN111141038A (en) * | 2020-01-16 | 2020-05-12 | 河北道荣新能源科技有限公司 | Three-tube butt joint structure and method of solar heat collection tube |
| CN111156719A (en) * | 2020-01-16 | 2020-05-15 | 河北道荣新能源科技有限公司 | Double-pipe butt joint structure and method of solar heat collecting pipe |
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