CN103058700B - Insulating sealed metal air pipe as well as sealed connection method of metal pipes and ceramic pipe - Google Patents
Insulating sealed metal air pipe as well as sealed connection method of metal pipes and ceramic pipe Download PDFInfo
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- CN103058700B CN103058700B CN201310043261.7A CN201310043261A CN103058700B CN 103058700 B CN103058700 B CN 103058700B CN 201310043261 A CN201310043261 A CN 201310043261A CN 103058700 B CN103058700 B CN 103058700B
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Abstract
The invention discloses an insulating sealed metal air pipe which comprises a first metal pipe, a second metal pipe and a ceramic pipe, wherein a first space is formed by the inner wall of the ceramic pipe and the outer wall of the first metal pipe; oxide sealing layers are respectively arranged at two ends of the first space; a metal sealing layer is filled in the first space; a second space is formed by the inner wall of the ceramic pipe and the outer wall of the second metal pipe; oxide sealing layers are respectively arranged at two ends of the second space; and a metal sealing layer is filled in the second space. Furthermore, the invention relates to a sealed connection method of metal pipes and a ceramic pipe. The sealed connection method comprises the following steps of: forming a first metal sealing layer and a second metal sealing layer on the inner wall of the ceramic pipe; respectively coating oxide sealing slurries at two ends of the first metal sealing layer and at two ends of the second metal sealing layer; and respectively welding the two metal pipes with the metal sealing layers. The insulating sealed metal air pipe disclosed by the invention is applicable to various environmental atmospheres at high temperature.
Description
Technical field
The present invention relates to metal connection area, particularly the seal connecting method of insulated enclosure metal tracheae and metal tube and vitrified pipe.
Background technology
Metal is a kind of technology that uses ceramic dielectic to be connected with metal with ceramic seal, this technology makes the metal of working under high temperature keep insulativity, is mainly used in the industries such as vacuum electron device, semi-conductor, unicircuit, electric light source, laser nuclear power, chemical industry, metallurgy, power equipment.
Method for sealing between metal and pottery mainly contains three kinds:
One is oxide solder method, claims again glass solder method, utilizes solder fusing to form glass and permeates and infiltrate metallic surface to pottery, thereby complete the sealing-in of pottery and metal.
One is sintering metal powder method, first will, with high temperature sintering layer of metal layer on pottery in reduced form atmosphere, make ceramic surface with metalline, and then itself and metal are welded, thereby complete sealing-in ceramic and metal.
One is active metal method, utilize the metals such as the transition metals such as titanium, zirconium, hafnium and copper, nickel, silver to form alloy at the temperature lower than fusing point separately, these alloys react with ceramic surface and infiltrate various metals under liquid phase state, thereby complete the sealing-in of pottery and metal.
Because sintering metal powder method or active metal method relate to suitable metal, as metals such as copper, nickel, titaniums, at high temperature can there is oxidizing reaction in these metals, easily make sealing-in place occur aging, therefore sintering metal powder method or active metal method at high temperature can only work in neutrality or reduced form atmosphere, and can not work in oxidizing atmosphere.
Summary of the invention
The technical problem that the present invention solves is to provide the seal connecting method of a kind of insulated enclosure metal tracheae and metal tube and vitrified pipe, is applicable to the various ambiances under high-temperature condition.
The invention provides a kind of insulated enclosure metal tracheae, comprising: the vitrified pipe that the first metal tube, the second metal tube and inwall are connected with the outer wall of the second metal tube with the outer wall of described the first metal tube respectively;
The outer wall of the inwall of described vitrified pipe and described the first metal tube forms the first space, and the two ends in described the first space are provided with oxide seal layer, and described the first interior volume is filled with metallic seal layer;
The outer wall of the inwall of described vitrified pipe and described the second metal tube forms second space, and the two ends of described second space are provided with oxide seal layer, and described second space inside is filled with metallic seal layer.
Preferably, described metallic seal layer comprises Mo, Mn, W, Cu, Ti, Ag, Au, Ni, Zr, Nb, Be, V, Zn, one or more in Sn and Pb.
Preferably, described oxide seal layer comprises SiO
2, Al
2o
3, B
2o
3, ZnO, RO and A
2one or more in O, described RO is MgO, CaO, SrO or BaO, described A
2o is K
2o, Na
2o or Li
2o.
Preferably, the coefficient of expansion of described the first metal tube and the second metal tube is greater than the thermal expansivity of vitrified pipe.
Preferably, in described vitrified pipe, cross-sectional area is everywhere consistent.
Preferably, the cross-sectional area at the interior two ends of described vitrified pipe is greater than the cross-sectional area at middle part.
The present invention also provides a kind of insulated enclosure method of metal tube and vitrified pipe, comprises the following steps:
(A) at the two ends of vitrified pipe inwall metallizing sealing slurry respectively, carry out sintering, form the first metallic seal layer and the second metallic seal layer;
(B) applying oxide seal slurry at the two ends of described the first metallic seal layer completely cuts off the two ends of described the first metallic seal layer and air;
Two ends at described the second metallic seal layer apply respectively oxide seal slurry, make the two ends of the second metallic seal layer and air isolated;
(C) by the first metal tube and the welding of the first metallic seal layer, make the first metallic seal layer and air isolated; By the second metal tube and the welding of the second metallic seal layer, make the second metallic seal layer and air isolated.
Preferably, in described step (A), the temperature of described sintering is 1400 ~ 1600 DEG C, and described sintering time is 50 ~ 70 minutes.
Preferably, after step (A), be also included in nickel plating on the first metal layer and the second metal level.
Preferably, in described step (C), the method for described welding is soldering, and the temperature of described soldering is 1000 ~ 1200 DEG C.
Compared with prior art, insulated enclosure metal tracheae of the present invention comprises: the vitrified pipe that the first metal tube, the second metal tube and inwall are connected with the outer wall of the second metal tube with the outer wall of described the first metal tube respectively; The outer wall of the inwall of described vitrified pipe and described the first metal tube forms the first space, and the two ends in described the first space are provided with oxide seal layer, and described the first interior volume is filled with metallic seal layer; The outer wall of the inwall of described vitrified pipe and described the second metal tube forms second space, and the two ends of described second space are provided with oxide seal layer, and described the first interior volume is filled with metallic seal layer.
Because the existing oxide seal layer in junction of metal tube and vitrified pipe has again metallic seal layer, connect closely, be difficult for throwing off, seal good.And because metallic seal layer is filled between oxide seal material, metallic seal layer does not directly contact with air, is difficult for oxidizing reaction at high temperature occurs, and aging speed is slow, therefore be applicable to the various ambiances under high-temperature condition, and no longer only limit the use of in neutrality or reduced form atmosphere.
Brief description of the drawings
Fig. 1 is that vitrified pipe inwall is the sectional view of the insulated enclosure metal tracheae of cylinder shape;
Fig. 2 is that vitrified pipe inwall is the sectional view of the insulated enclosure metal tracheae of " work " type.
Embodiment
In order further to understand the present invention, below in conjunction with embodiment, the preferred embodiment of the invention is described, but should be appreciated that these are described is for further illustrating the features and advantages of the present invention, instead of limiting to the claimed invention.
The embodiment of the invention discloses a kind of insulated enclosure metal tracheae, comprising: the vitrified pipe that the first metal tube, the second metal tube and inwall are connected with the outer wall of the second metal tube with the outer wall of described the first metal tube respectively;
The outer wall of the inwall of described vitrified pipe and described the first metal tube forms the first space, and the two ends in described the first space are provided with oxide seal layer, and described the first interior volume is filled with metallic seal layer;
The outer wall of the inwall of described vitrified pipe and described the second metal tube forms second space, and the two ends of described second space are provided with oxide seal layer, and described second space inside is filled with metallic seal layer.
In the present invention, insulated enclosure metal tracheae, comprising: the vitrified pipe that the first metal tube, the second metal tube and inwall are connected with the outer wall of the second metal tube with the outer wall of described the first metal tube respectively.
Described the first metal tube inserts one end of vitrified pipe, and its outer wall is connected with the inwall of vitrified pipe, and the second metal tube inserts other one end of vitrified pipe, and the outer wall of the second metal tube is connected with ceramic inwall.The first metal tube does not contact with the end of the second metal tube, and the inner tube of the first metal tube, vitrified pipe and the second metal tube communicates successively.
The present invention is not particularly limited for the material of the first metal tube and the second metal tube, and its coefficient of expansion is preferably greater than the coefficient of expansion of vitrified pipe.In applied at elevated temperature process, metallic seal layer is subject to prolonging stress radially between metal tube and vitrified pipe, is conducive to sealing.
Vitrified pipe couples together the first metal tube and the second metal tube, and because pottery is non-conductive at 600 ~ 1000 DEG C, therefore it can play the effect that insulation connects.The present invention is not particularly limited the shape of vitrified pipe inwall, is preferably " work " type or cylinder shape.The cross-sectional area that described " work " type is vitrified pipe two ends is greater than the cross-sectional area at middle part; It is consistent that described cylinder shape is in vitrified pipe cross-sectional area everywhere.
The outer wall of the inwall of described vitrified pipe and described the first metal tube forms the first space, described the first space was around the first metal tube outer wall one week, in order to ensure stopping property, be therefore provided with oxide seal layer at the two ends in described the first space, described the first interior volume is filled with metallic seal layer.The outer wall of the inwall of described vitrified pipe and described the second metal tube forms second space, and in order to ensure stopping property, the two ends of described second space are provided with oxide seal layer equally, and described second space inside is filled with metallic seal layer.
In the present invention, metal tube is connected with vitrified pipe with oxide seal layer by metallic seal layer.In the first space and second space, in the middle of oxide seal layer is all coated on metallic seal layer, make metallic seal layer and air isolated, prevent that metallic seal layer is oxidized in well-oxygenated environment.
Insulated enclosure metal tracheae concrete structure of the present invention is referring to Fig. 1 and Fig. 2.Fig. 1 is that vitrified pipe inwall is the sectional view of the insulated enclosure metal tracheae of cylinder shape, comprises the first metal tube 1, vitrified pipe 2, metallic seal layer 3, oxide seal layer 4a, oxide seal layer 4b and the second metal tube 5; Vitrified pipe 2 inwalls are cylinder shape, the outer wall of the inwall of described vitrified pipe 2 and described the first metal tube 1 forms the first space, the one end in described the first space is that the position that vitrified pipe top is connected with the first metal tube is provided with oxide seal layer 4a, the other end in described the first space, the position that vitrified pipe middle part is connected with the bottom of the first metal tube 1 outer wall is provided with oxide seal layer 4b.Between oxide seal layer 4a and oxide seal layer 4b, be filled with the close layer 3 of metal.The second metal tube 5 is identical with the mode of connection of vitrified pipe 2 with the first metal tube 4 with ceramic mode of connection, and the second metal tube 5 does not contact with the first metal tube 1.Under hot environment, metallic seal layer 3 is subject to prolonging stress radially between metal tube 1 and vitrified pipe 2, is conducive to sealing.
Fig. 2 is that vitrified pipe inwall is the sectional view of the insulated enclosure metal tracheae of " work " type, comprises the first metal tube 1, vitrified pipe 2, metallic seal layer 3, oxide seal layer 4a, oxide seal layer 4b and the second metal tube 5; Vitrified pipe 2 inwalls are " work " type, and the cross-sectional area at two ends is greater than the cross-sectional area at middle part, and the cross-sectional area of the first metal tube 1 inwall equates with the cross-sectional area at vitrified pipe 2 inwall middle parts.The outer wall of the first metal tube 1 is connected with the inwall of vitrified pipe 2, form the first space, described first one end, space, be that the position that vitrified pipe top is connected with the first metal tube is provided with oxide seal layer 4a, the other end in described the first space, the position that vitrified pipe middle part is connected with the bottom of the first metal tube 1 outer wall is provided with oxide seal layer 4b.Between oxide seal layer 4a and oxide seal layer 4b, be filled with metallic seal layer 3.The second metal tube 5 is identical with the mode of connection of vitrified pipe 2 with the first metal tube 4 with ceramic mode of connection, and the second metal tube 5 does not contact with the first metal tube 1.Under hot environment, metallic seal layer 3 is subject to prolonging stress radially between metal tube 1 and vitrified pipe 2, is conducive to sealing.
The difference of Fig. 1 and Fig. 2 is, the shape difference of oxide seal layer 4b.The present invention does not limit the shape of oxide seal layer 4b, can make metallic seal layer 3 and air isolated.
The inner metallic seal layer of filling of the metallic seal layer that described the first interior volume is filled and second space is close can select identical metallic seal material, also can select different metallic seal material, is preferably both identical.Described metallic seal layer preferably includes Mo, Mn, and W, Cu, Ti, Ag, Au, Ni, Zr, Nb, Be, V, Zn, one or more in Sn and Pb, more preferably comprise Mo and Mn.Metallic seal layer is connection metal pipe and vitrified pipe closely, and bonding force is higher.And metallic seal layer is between oxide seal layer, does not contact with air, thereby ensure it at high temperature, in oxidizing atmosphere time, can not be oxidized.
The oxide seal layer at described the first two ends, space and the oxide seal layer at second space two ends can be selected identical oxide seal material, also can select different oxide seal material, are preferably both identical.Described oxide seal layer preferably includes SiO
2, Al
2o
3, B
2o
3, ZnO, RO and A
2one or more in O, described RO is MgO, CaO, SrO or BaO, A
2o is K
2o, Na
2o or Li
2o, more preferably comprises SiO
2, Al
2o
3and B
2o
3.
The present invention also provides a kind of insulated enclosure method of metal tube and vitrified pipe, comprises the following steps:
(A) at the two ends of vitrified pipe inwall metallizing sealing slurry respectively, carry out sintering, form the first metallic seal layer and the second metallic seal layer;
(B) applying oxide seal slurry at the two ends of described the first metallic seal layer completely cuts off the two ends of described the first metallic seal layer and air;
Two ends at described the second metallic seal layer apply oxide seal slurry, make the two ends of the second metallic seal layer and air isolated;
(C) by the first metal tube and the first metal layer welding, make the first metal layer and air isolated; By the second metal tube and the welding of the second metal level, make the second metal level and air isolated.
In the present invention, first, at one end of vitrified pipe inwall metallizing sealing slurry, carry out sintering, form the first metallic seal layer.The present invention is not particularly limited the area of metallizing sealing slurry, and those skilled in the art can select according to the connection of metal tube and vitrified pipe.The preparation method of described metallic seal slurry is preferably metal-powder with organic solvent and evenly mixes, and obtaining metal paste through grinding.Described metal-powder is preferably Mo, Mn, W, Cu, Ti, Ag, Au, Ni, Zr, Nb, Be, V, Zn, one or more in Sn and Pb, more preferably Mo and Mn.The powder that described metal-powder always can also add other kinds, with assisted sintering, preferably adds alumina powder.Described organic solvent is preferably and Mierocrystalline cellulose and Terpineol 350.The present invention is not particularly limited the blending ratio of metal-powder and organic solvent, and those skilled in the art can mix according to the ratio of knowing.The present invention is also not particularly limited the mode of grinding, and can preferably grind with three-roll grinder.
Described the first metal layer was around vitrified pipe inside one week.Described sintering preferably carries out in hydrogen atmosphere; The temperature of described sintering is preferably 1400 ~ 1600 DEG C, more preferably 1450 ~ 1550 DEG C; Described sintering time is preferably 50 ~ 70 minutes, more preferably 55 ~ 65 minutes.
Form after the first metallic seal layer, preferably nickel plating on the first metallic seal layer, the thickness of described nickel is 4 ~ 10 μ m, nickel layer can improve the wandering situation of scolder at metal level, slows down the unrelieved stress in joint, improves strength of joint.
In the present invention, in vitrified pipe, form after the first metallic seal layer, apply oxide seal slurry at the two ends of described the first metal layer, make the two ends of the first metallic seal layer and air isolated.Described oxide seal slurry is the mixture of oxide powder and solvent, and its preparation method is preferably:
Oxide powder ball milling is mixed, and melting, obtains glass after cooling;
After described glass is pulverized, mix with organic solvent, grind, obtain oxide seal slurry.
Described oxide powder is preferably SiO
2, Al
2o
3, B
2o
3, ZnO, RO and A
2one or more in O, described RO is MgO, CaO, SrO or BaO, A
2o is K
2o, Na
2o or Li
2o, more preferably SiO
2, Al
2o
3and B
2o
3.Described melt temperature is preferably 1300 ~ 1500 DEG C, more preferably 1350 ~ 1450 DEG C.
Described organic solvent is preferably and Mierocrystalline cellulose and Terpineol 350.The present invention is not particularly limited the blending ratio of metal-powder and organic solvent, and those skilled in the art can mix according to the ratio of knowing.The present invention is also not particularly limited the mode of grinding, and can preferably grind with three-roll grinder.
In the present invention, after the two ends of described the first metal layer and air are isolated, by the first metal tube and the welding of the first metallic seal layer, make the first metallic seal layer and air isolated.Through welding, the outer wall of the first metal tube is connected by the first metallic seal layer with vitrified pipe inwall, and the two ends of the first metallic seal layer are oxide seal layer.Because the temperature of welding is higher, therefore after oxide seal slurry drying, with the tight sealing-in of vitrified pipe inwall.Described welding is preferably soldering, and described soldering preferably utilizes spelter solder ring, and described soldering is preferably carried out in hydrogen atmosphere, and the temperature of described soldering is preferably 1000 ~ 1200 DEG C, more preferably 1050 ~ 1150 DEG C.
After having welded, the first metal tube is connected with vitrified pipe insulated enclosure.
The second metal tube is identical with the seal connecting method of above-mentioned the first metal tube and vitrified pipe with the seal connecting method of vitrified pipe.At the other end metallizing sealing slurry of vitrified pipe inwall, carry out sintering, form the second metallic seal layer.The present invention is not particularly limited the area of metallizing sealing slurry, and those skilled in the art can select according to the connection of metal tube and vitrified pipe.The metallic seal slurry that the metallic seal slurry that the second metallic seal layer is selected can be selected with the first sealing ply is identical, also can be different.The preparation method of the second metallic seal layer is identical with the preparation method of the first sealing ply.
Described the second metal level was around vitrified pipe inside one week.Described sintering preferably carries out in hydrogen atmosphere; The temperature of described sintering is preferably 1400 ~ 1600 DEG C, more preferably 1450 ~ 1550 DEG C; Described sintering time is preferably 50 ~ 70 minutes, more preferably 55 ~ 65 minutes.
Form after the second metallic seal layer, preferably nickel plating on the first metallic seal layer, the thickness of described nickel is 4 ~ 10 μ m, nickel layer can improve the wandering situation of scolder at metal level, slows down the unrelieved stress in joint, improves strength of joint.
In the present invention, in vitrified pipe, form after the second metallic seal layer, apply oxide seal slurry at the two ends of described the second metal level, make the two ends of the second metallic seal layer and air isolated.Described oxide seal slurry is the mixture of oxide powder and solvent, and its preparation method is preferably:
Oxide powder ball milling is mixed, and melting, obtains glass after cooling;
After described glass is pulverized, mix with organic solvent, grind, obtain oxide seal slurry.
Described oxide powder is preferably SiO
2, Al
2o
3, B
2o
3, ZnO, RO and A
2one or more in O, described RO is MgO, CaO, SrO or BaO, A
2o is K
2o, Na
2o or Li
2o, more preferably SiO
2, Al
2o
3and B
2o
3.Described melt temperature is preferably 1300 ~ 1500 DEG C, more preferably 1350 ~ 1450 DEG C.
Described organic solvent is preferably and Mierocrystalline cellulose and Terpineol 350.The present invention is not particularly limited the blending ratio of metal-powder and organic solvent, and those skilled in the art can mix according to the ratio of knowing.The present invention is also not particularly limited the mode of grinding, and can preferably grind with three-roll grinder.
In the present invention, after the two ends of described the second metal level and air are isolated, by the second metal tube and the welding of the second metallic seal layer, make the second metallic seal layer and air isolated.Through welding, the outer wall of the first metal tube is connected by the first metallic seal layer with vitrified pipe inwall, and the two ends of the first metallic seal layer are oxide seal layer.Because the temperature of welding is higher, therefore after oxide seal slurry drying, with the tight sealing-in of vitrified pipe inwall.Described welding is preferably soldering, and described soldering preferably utilizes spelter solder ring, and described soldering is preferably carried out in hydrogen atmosphere, and the temperature of described soldering is preferably 1000 ~ 1200 DEG C, more preferably 1050 ~ 1150 DEG C.
In the middle of actually operating, for easy and simple to handle, can, at the two ends while of vitrified pipe inwall metallizing sealing slurry, carry out after sintering, obtain respectively the first metallic seal layer and the second metallic seal layer.Then apply respectively oxide seal slurry at the two ends of the first metal layer and the two ends of the second metal level of vitrified pipe inwall.Weld at the two ends of finally the first metal tube and the second metal tube being inserted in respectively to vitrified pipe.
The insulated enclosure metal tracheae that described insulated enclosure method is obtained carries out insulativity and performing leak test, and result shows, the insulation resistance at metal tube two ends is 1.8 × 10
12~ 2.2 × 10
12ohm, and stopping property is good.
In order further to understand the present invention, below in conjunction with embodiment, the seal connecting method of insulated enclosure metal tracheae provided by the invention and metal tube and vitrified pipe is described, protection scope of the present invention is not limited by the following examples.
Embodiment 1
By 20 grams of SiO
2, 55 grams of B
2o
3, 25 grams of Al
2o
3ball milling mixes, and melting at 1400 DEG C is poured into and in cold water, formed glass.Glass breaking is also crossed to 40 mesh sieves, obtain glass capsulation weighting agent powder.80 grams of glass capsulation weighting agent powder, 1 gram of ethyl cellulose, 19 grams of Terpineol 350s are mixed and ground by three-roll grinder, make oxide seal slurry.
By 52 grams of Mo powder, 14 grams of Mn powder, 14 grams of Al
2o
3powder, 1 gram of ethyl cellulose, 19 grams of Terpineol 350s mix and grind by three-roll grinder, make metallic seal slurry.
By clean clean vitrified pipe inwall, evenly apply respectively described metallic seal slurry at the two ends of vitrified pipe inwall, then 1500 DEG C of sintering 60 minutes in hydrogen atmosphere, obtain the first metal layer and the second metal level.
The nickel dam of 5um left and right will be plated at metallization inwall after the above-mentioned vitrified pipe polishing that sinters the first metal layer and the second layer.
Outer wall at the first metal tube and the second metal tube all puts spelter solder ring, apply respectively oxide seal slurry at the two ends of described the first metal layer and the two ends of the second metal level, make the two ends of described the first metal layer and the two ends of the second metal level all isolated with air.Then the first metal tube and the second metal tube are inserted in respectively in vitrified pipe and with fixture and are fixed, the first metal tube and the first metal layer be soldering under 1100 DEG C of conditions in hydrogen atmosphere, makes the first metal layer and air isolated; The second metal tube and the second metal level be soldering under 1100 DEG C of conditions in hydrogen atmosphere, makes the second metal level and air isolated.
At 830 DEG C of temperature, pass into respectively air, nitrogen, hydrogen, import and outlet water circulating cooling, measure metal tube two ends insulation resistance with insulation tester, and Measuring Time is 30 seconds, with gas meter measurement air inlet and the air flow rate of giving vent to anger.Experimental result is referring to table 1, and table 1 is the sealed insulation performance of insulated enclosure metal tracheae in various atmosphere.
The sealed insulation performance of insulated enclosure metal tracheae in the various atmosphere of table 1
| ? | 30 seconds insulation resistances (ohm) | Inlet flow rate (sccm) | Rate of discharge (sccm) |
| Air | 1.8×10 12 | 1003 | 997 |
| Nitrogen | 2.1×10 12 | 998 | 1001 |
| Hydrogen | 1.9×10 12 | 997 | 995 |
As shown in Table 1, the insulation of the insulated enclosure metal tracheae that the present invention obtains is all right, seals all right.
The explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiment, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. an insulated enclosure metal tracheae, comprising: the vitrified pipe that the first metal tube, the second metal tube and inwall are connected with the outer wall of the second metal tube with the outer wall of described the first metal tube respectively;
The outer wall of the inwall of described vitrified pipe and described the first metal tube forms the first space, and the two ends in described the first space are provided with oxide seal layer, and described the first interior volume is filled with metallic seal layer;
The outer wall of the inwall of described vitrified pipe and described the second metal tube forms second space, and the two ends of described second space are provided with oxide seal layer, and described second space inside is filled with metallic seal layer;
The preparation method of described metallic seal layer, comprises the following steps:
(A) at the two ends of vitrified pipe inwall metallizing sealing slurry respectively, carry out sintering, form the first metallic seal layer and the second metallic seal layer;
(B) applying oxide seal slurry at the two ends of described the first metallic seal layer completely cuts off the two ends of described the first metallic seal layer and air;
Two ends at described the second metallic seal layer apply respectively oxide seal slurry, make the two ends of the second metallic seal layer and air isolated;
(C) by the first metal tube and the welding of the first metallic seal layer, make the first metallic seal layer and air isolated; By the second metal tube and the welding of the second metallic seal layer, make the second metallic seal layer and air isolated.
2. metal tracheae according to claim 1, is characterized in that, described metallic seal layer comprises Mo, Mn, W, Cu, Ti, Ag, Au, Ni, Zr, Nb, Be, V, Zn, one or more in Sn and Pb.
3. metal tracheae according to claim 1, is characterized in that, described oxide seal layer comprises SiO
2, Al
2o
3, B
2o
3, ZnO, RO and A
2one or more in O, described RO is MgO, CaO, SrO or BaO, described A
2o is K
2o, Na
2o or Li
2o.
4. metal tracheae according to claim 1, is characterized in that, the coefficient of expansion of described the first metal tube and the second metal tube is greater than the thermal expansivity of vitrified pipe.
5. metal tracheae according to claim 1, is characterized in that, in described vitrified pipe, cross-sectional area is everywhere consistent.
6. metal tracheae according to claim 1, is characterized in that, in described vitrified pipe, the cross-sectional area at two ends is greater than the cross-sectional area at middle part.
7. in an insulated enclosure metal tracheae claimed in claim 1, the insulated enclosure method of metal tube and vitrified pipe, comprises the following steps:
(A) at the two ends of vitrified pipe inwall metallizing sealing slurry respectively, carry out sintering, form the first metallic seal layer and the second metallic seal layer;
(B) applying oxide seal slurry at the two ends of described the first metallic seal layer completely cuts off the two ends of described the first metallic seal layer and air;
Two ends at described the second metallic seal layer apply respectively oxide seal slurry, make the two ends of the second metallic seal layer and air isolated;
(C) by the first metal tube and the welding of the first metallic seal layer, make the first metallic seal layer and air isolated; By the second metal tube and the welding of the second metallic seal layer, make the second metallic seal layer and air isolated.
8. insulated enclosure method according to claim 7, is characterized in that, in described step (A), the temperature of described sintering is 1400～1600 DEG C, and described sintering time is 50～70 minutes.
9. insulated enclosure method according to claim 7, is characterized in that, is also included in nickel plating on the first metal layer and the second metal level after step (A).
10. insulated enclosure method according to claim 7, is characterized in that, in described step (C), the method for described welding is soldering, and the temperature of described soldering is 1000～1200 DEG C.
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|---|---|---|---|---|
| CN101942864A (en) * | 2010-09-10 | 2011-01-12 | 江苏科技大学 | Composited tube node and production method |
| CN102570157A (en) * | 2011-12-29 | 2012-07-11 | 航天时代电子技术股份有限公司 | Connector with sealing function |
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2013
- 2013-01-31 CN CN201310043261.7A patent/CN103058700B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942864A (en) * | 2010-09-10 | 2011-01-12 | 江苏科技大学 | Composited tube node and production method |
| CN102570157A (en) * | 2011-12-29 | 2012-07-11 | 航天时代电子技术股份有限公司 | Connector with sealing function |
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| CN103058700A (en) | 2013-04-24 |
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