CN103058700A - 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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- CN103058700A CN103058700A CN2013100432617A CN201310043261A CN103058700A CN 103058700 A CN103058700 A CN 103058700A CN 2013100432617 A CN2013100432617 A CN 2013100432617A CN 201310043261 A CN201310043261 A CN 201310043261A CN 103058700 A CN103058700 A CN 103058700A
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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 the 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 of using ceramic dielectic to be connected with metal with ceramic seal, this technology makes the metal of working under the 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 the pottery mainly contains three kinds:
A kind of is oxide solder method, claims again the glass solder method, namely utilizes solder fusing to form glass to pottery infiltration and infiltration metallic surface, thereby finishes the sealing-in of pottery and metal.
A kind of is the sintering metal powder method, namely at first will make ceramic surface with metalline, and then itself and metal are welded with high temperature sintering layer of metal layer on pottery in reduced form atmosphere, thereby finish sealing-in ceramic and metal.
A kind of is the reactive metal method, namely utilize the metals such as the transition metals such as titanium, zirconium, hafnium and copper, nickel, silver to form alloy being lower than under the temperature of fusing point separately, these alloys react with ceramic surface under the liquid phase attitude and infiltrate various metals, thereby finish the sealing-in of pottery and metal.
Because sintering metal powder method or reactive metal method relate to suitable metal, such as metals such as copper, nickel, titaniums, oxidizing reaction at high temperature can occur in these metals, it is aging that sealing-in place is occurred, therefore sintering metal powder method or reactive metal method at high temperature can only work in neutrality or the reduced form atmosphere, and can not work in the 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 the 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 link to each other with the outer wall of the outer wall of described the first metal tube and the second 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 the oxide seal layer, and described the first interior volume is filled with the 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 the oxide seal layer, and described second space inside is filled with the 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 among Sn and the Pb.
Preferably, described oxide seal layer comprises SiO
2, Al
2O
3, B
2O
3, ZnO, RO and A
2Among the O one or more, described RO are 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, everywhere cross-sectional area is consistent in the described vitrified pipe.
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 the insulated enclosure method of a kind of metal tube and vitrified pipe, may further comprise the steps:
(A) at the two ends of vitrified pipe inwall difference metallizing sealing slurry, carry out sintering, form the first metallic seal layer and the second metallic seal layer;
(B) applying the 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 the oxide seal slurry, make the two ends of the second metallic seal layer and air isolated;
(C) with the first metal tube and the welding of the first metallic seal layer, make the first metallic seal layer and air isolated; With the second metal tube and the welding of the second metallic seal layer, make the second metallic seal layer and air isolated.
Preferably, in the described step (A), the temperature of described sintering is 1400 ~ 1600 ℃, and described sintering time is 50 ~ 70 minutes.
Preferably, also be included in nickel plating on the first metal layer and the second metal level after the step (A).
Preferably, in the described step (C), the method for described welding is soldering, and the temperature of described soldering is 1000 ~ 1200 ℃.
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 link to each other with the outer wall of the outer wall of described the first metal tube and the second 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 the oxide seal layer, and described the first interior volume is filled with the 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 the oxide seal layer, and described the first interior volume is filled with the metallic seal layer.
Because the existing oxide seal layer in junction of metal tube and vitrified pipe has again the metallic seal layer, connect closely, be difficult for throwing off, seal good.And owing to the metallic seal layer is filled between the oxide seal material, the 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 the high-temperature condition, and no longer only limit the use of in neutrality or reduced form atmosphere.
Description of drawings
Fig. 1 is that the vitrified pipe inwall is the sectional view of the insulated enclosure metal tracheae of cylinder shape;
Fig. 2 is that the vitrified pipe inwall is the sectional view of the insulated enclosure metal tracheae of " worker " 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 describe just as further specifying the features and advantages of the present invention, rather than to the restriction of claim of the present 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 link to each other with the outer wall of the outer wall of described the first metal tube and the second 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 the oxide seal layer, and described the first interior volume is filled with the 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 the oxide seal layer, and described second space inside is filled with the metallic seal layer.
Among the present invention, insulated enclosure metal tracheae comprises: the vitrified pipe that the first metal tube, the second metal tube and inwall link to each other with the outer wall of the outer wall of described the first metal tube and the second metal tube respectively.
Described the first metal tube inserts an end of vitrified pipe, and its outer wall is connected with the inwall of vitrified pipe, and the second metal tube inserts an other end of vitrified pipe, and the outer wall of the second metal tube is connected with the inwall of pottery.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 does not have particular restriction 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 the applied at elevated temperature process, the metallic seal layer is subject to prolonging between metal tube and the vitrified pipe stress radially, is conducive to sealing.
Vitrified pipe couples together the first metal tube and the second metal tube, because pottery is non-conductive under 600 ~ 1000 ℃, so it can play the effect that insulation connects.The present invention does not have particular restriction to the shape of vitrified pipe inwall, is preferably " worker " type or cylinder shape.Described " worker " type is the cross-sectional area at vitrified pipe two ends greater than the cross-sectional area at middle part; The cross-sectional area that described cylinder shape is in the vitrified pipe everywhere is consistent.
The outer wall of the inwall of described vitrified pipe and described the first metal tube forms the first space, described the first space is around one week of the first metal tube outer wall, in order to guarantee stopping property, therefore be provided with the oxide seal layer at the two ends in described the first space, described the first interior volume is filled with the 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 guarantee stopping property, the two ends of described second space are provided with the oxide seal layer equally, and described second space inside is filled with the metallic seal layer.
In the present invention, metal tube is connected with vitrified pipe with the oxide seal layer by the metallic seal layer.In the first space and second space, in the middle of the oxide seal layer all is coated on the metallic seal layer, make metallic seal layer and air isolated, prevent that the 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 the 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, one end in described the first space is that the position that the vitrified pipe top links to each other with the first metal tube is provided with oxide seal layer 4a, the other end in described the first space, the position that namely links to each other with the bottom of the first metal tube 1 outer wall in the middle part of the vitrified pipe is provided with oxide seal layer 4b.Be filled with the close layer 3 of metal between oxide seal layer 4a and the oxide seal layer 4b.The second metal tube 5 is identical with the mode of connection of vitrified pipe 2 with the first metal tube 4 with the mode of connection of pottery, 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 between metal tube 1 and the vitrified pipe 2 stress radially, is conducive to sealing.
Fig. 2 is that the vitrified pipe inwall is the sectional view of the insulated enclosure metal tracheae of " worker " 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 " worker " 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 inwalls middle part.The outer wall of the first metal tube 1 is connected with the inwall of vitrified pipe 2, form the first space, described the first space one end, be that the position that the vitrified pipe top links to each other with the first metal tube is provided with oxide seal layer 4a, the other end in described the first space, the position that namely links to each other with the bottom of the first metal tube 1 outer wall in the middle part of the vitrified pipe is provided with oxide seal layer 4b.Be filled with metallic seal layer 3 between oxide seal layer 4a and the oxide seal layer 4b.The second metal tube 5 is identical with the mode of connection of vitrified pipe 2 with the first metal tube 4 with the mode of connection of pottery, 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 between metal tube 1 and the vitrified pipe 2 stress radially, is conducive to sealing.
The difference of Fig. 1 and Fig. 2 is that the shape of oxide seal layer 4b is different.The present invention can make that metallic seal layer 3 and air are isolated to be got final product to the shape of oxide seal layer 4b without limits.
The metallic seal layer that described the first interior volume is filled can be selected identical metallic seal material with the inner metallic seal layer of filling of second space is close, also can select different metallic seal material, and it is identical to be preferably both.Described metallic seal layer preferably includes Mo, Mn, and W, Cu, Ti, Ag, Au, Ni, Zr, Nb, Be, V, Zn, one or more among Sn and the Pb more preferably comprise Mo and Mn.The metallic seal layer is connection metal pipe and vitrified pipe closely, and bonding force is higher.And the metallic seal layer not with contact with air, thereby guarantees it at high temperature between the oxide seal layer, when being in the oxidizing atmosphere, oxidation can not occur.
The oxide seal layer at two ends, described the first 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, and it is identical to be preferably both.Described oxide seal layer preferably includes SiO
2, Al
2O
3, B
2O
3, ZnO, RO and A
2Among the O one or more, described RO are 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 the insulated enclosure method of a kind of metal tube and vitrified pipe, may further comprise the steps:
(A) at the two ends of vitrified pipe inwall difference metallizing sealing slurry, carry out sintering, form the first metallic seal layer and the second metallic seal layer;
(B) applying the 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 the oxide seal slurry, make the two ends of the second metallic seal layer and air isolated;
(C) with the first metal tube and the first metal layer welding, make the first metal layer and air isolated; With the second metal tube and the welding of the second metal level, make the second metal level and air isolated.
In the present invention, at first at the end metallizing sealing slurry of vitrified pipe inwall, carry out sintering, form the first metallic seal layer.The present invention does not have particular restriction to 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 and organic solvent and evenly mixes, passes through grinding and obtaining metal paste.Described metal-powder is preferably Mo, Mn, W, Cu, Ti, Ag, Au, Ni, Zr, Nb, Be, V, Zn, one or more among Sn and the Pb, more preferably Mo and Mn.The powder that described metal-powder always can also add other kinds preferably adds alumina powder with assisted sintering.Described organic solvent is preferably and Mierocrystalline cellulose and Terpineol 350.The present invention does not have particular restriction to 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 does not have particular restriction to the mode of grinding yet, and can preferably grind with three-roll grinder.
Described the first metal layer is around one week of vitrified pipe inside.Described sintering preferably carries out in hydrogen atmosphere; The temperature of described sintering is preferably 1400 ~ 1600 ℃, more preferably 1450 ~ 1550 ℃; Described sintering time is preferably 50 ~ 70 minutes, more preferably 55 ~ 65 minutes.
After forming 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 scolder in the wandering situation of metal level, slows down the unrelieved stress in the joint, improves strength of joint.
In the present invention, behind formation the first metallic seal layer, apply the oxide seal slurry at the two ends of described the first metal layer in the vitrified pipe, 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:
The oxide powder ball milling is mixed, and melting obtains glass after the cooling;
With mixing with organic solvent after the described glass pulverizing, grind, obtain the oxide seal slurry.
Described oxide powder is preferably SiO
2, Al
2O
3, B
2O
3, ZnO, RO and A
2Among the O one or more, described RO are MgO, CaO, SrO or BaO, A
2O is K
2O, Na
2O or Li
2O, more preferably SiO
2, Al
2O
3And B
2O
3Described melt temperature is preferably 1300 ~ 1500 ℃, more preferably 1350 ~ 1450 ℃.
Described organic solvent is preferably and Mierocrystalline cellulose and Terpineol 350.The present invention does not have particular restriction to 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 does not have particular restriction to the mode of grinding yet, and can preferably grind with three-roll grinder.
In the present invention, with the first metal tube and the welding of the first metallic seal layer, make the first metallic seal layer and air isolated after the two ends of described the first metal layer and air are isolated.Through welding, the outer wall of the first metal tube is connected by the first metallic seal layer with the vitrified pipe inwall, and the two ends of the first metallic seal layer are the oxide seal layer.Because the temperature of welding is higher, so behind the oxide seal slurry drying, with the tight sealing-in of vitrified pipe inwall.Described welding is preferably soldering, and described soldering preferably utilizes the spelter solder ring, and described soldering is preferably carried out in hydrogen atmosphere, and the temperature of described soldering is preferably 1000 ~ 1200 ℃, more preferably 1050 ~ 1150 ℃.
After welding was finished, the first metal tube namely was connected with the vitrified pipe insulated enclosure.
The seal connecting method of the second metal tube and vitrified pipe is identical with the seal connecting method of above-mentioned the first metal tube and vitrified pipe.The other end metallizing sealing slurry at the vitrified pipe inwall carries out sintering, forms the second metallic seal layer.The present invention does not have particular restriction to 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 second metallic seal layer is selected can be identical with the metallic seal slurry that the first sealing ply is selected, 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 is around one week of vitrified pipe inside.Described sintering preferably carries out in hydrogen atmosphere; The temperature of described sintering is preferably 1400 ~ 1600 ℃, more preferably 1450 ~ 1550 ℃; Described sintering time is preferably 50 ~ 70 minutes, more preferably 55 ~ 65 minutes.
After forming 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 scolder in the wandering situation of metal level, slows down the unrelieved stress in the joint, improves strength of joint.
In the present invention, behind formation the second metallic seal layer, apply the oxide seal slurry at the two ends of described the second metal level in the vitrified pipe, 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:
The oxide powder ball milling is mixed, and melting obtains glass after the cooling;
With mixing with organic solvent after the described glass pulverizing, grind, obtain the oxide seal slurry.
Described oxide powder is preferably SiO
2, Al
2O
3, B
2O
3, ZnO, RO and A
2Among the O one or more, described RO are MgO, CaO, SrO or BaO, A
2O is K
2O, Na
2O or Li
2O, more preferably SiO
2, Al
2O
3And B
2O
3Described melt temperature is preferably 1300 ~ 1500 ℃, more preferably 1350 ~ 1450 ℃.
Described organic solvent is preferably and Mierocrystalline cellulose and Terpineol 350.The present invention does not have particular restriction to 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 does not have particular restriction to the mode of grinding yet, and can preferably grind with three-roll grinder.
In the present invention, with the second metal tube and the welding of the second metallic seal layer, make the second metallic seal layer and air isolated after the two ends of described the second metal level and air are isolated.Through welding, the outer wall of the first metal tube is connected by the first metallic seal layer with the vitrified pipe inwall, and the two ends of the first metallic seal layer are the oxide seal layer.Because the temperature of welding is higher, so behind the oxide seal slurry drying, with the tight sealing-in of vitrified pipe inwall.Described welding is preferably soldering, and described soldering preferably utilizes the spelter solder ring, and described soldering is preferably carried out in hydrogen atmosphere, and the temperature of described soldering is preferably 1000 ~ 1200 ℃, more preferably 1050 ~ 1150 ℃.
In the middle of actually operating, for easy and simple to handle, can be at the two ends of vitrified pipe inwall simultaneously metallizing sealing slurry, carry out sintering after, obtain respectively the first metallic seal layer and the second metallic seal layer.Then apply respectively the oxide seal slurry at the two ends of the first metal layer of vitrified pipe inwall and the two ends of the second metal level.Weld at the two ends of the first metal tube and the second metal tube being inserted in respectively vitrified pipe at last.
The insulated enclosure metal tracheae that described insulated enclosure method is obtained carries out insulativity and performing leak test, and the result shows that 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.
With 20 gram SiO
2, 55 the gram B
2O
3, 25 the gram Al
2O
3Ball milling mixes, and 1400 ℃ of lower meltings, pours into and forms glass in the cold water.Glass breaking is also crossed 40 mesh sieves, obtain glass capsulation weighting agent powder.80 gram glass capsulation weighting agent powder, 1 gram ethyl cellulose, 19 gram Terpineol 350s are mixed and grind by three-roll grinder, make the oxide seal slurry.
With 52 gram Mo powder, 14 gram Mn powder, 14 gram Al
2O
3Powder, 1 gram ethyl cellulose, 19 gram Terpineol 350s mix and grind by three-roll grinder, make the metallic seal slurry.
Vitrified pipe inwall cleaning is clean, evenly apply respectively described metallic seal slurry at the two ends of vitrified pipe inwall, then 1500 ℃ of sintering 60 minutes in hydrogen atmosphere obtain the first metal layer and the second metal level.
To plate nickel dam about 5um at the 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 the spelter solder ring, apply respectively the oxide seal slurry at the two ends of described the first metal layer and the two ends of the second metal level, the two ends of described the first metal layer and the two ends of the second metal level are all completely cut off with air.Then the first metal tube and the second metal tube are inserted in the vitrified pipe and with anchor clamps respectively and fix, the first metal tube and the first metal layer be soldering under 1100 ℃ 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 ℃ of conditions in hydrogen atmosphere, makes the second metal level and air isolated.
Under 830 ℃ of temperature, pass into respectively air, nitrogen, hydrogen, import and outlet water circulating cooling are measured metal tube two ends insulation resistance with insulation tester, and Measuring Time is 30 seconds, measures air inlet and the air flow rate of giving vent to anger with gas meter.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 just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle 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 claim of the present invention.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can in the situation that does not break away 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. insulated enclosure metal tracheae comprises: the vitrified pipe that the first metal tube, the second metal tube and inwall link to each other with the outer wall of the outer wall of described the first metal tube and the second 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 the oxide seal layer, and described the first interior volume is filled with the 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 the oxide seal layer, and described second space inside is filled with the metallic seal layer.
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 among Sn and the 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
2Among the O one or more, described RO are 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, everywhere cross-sectional area is consistent in the described vitrified pipe.
6. metal tracheae according to claim 1 is characterized in that, the cross-sectional area at two ends is greater than the cross-sectional area at middle part in the described vitrified pipe.
7. the insulated enclosure method of a metal tube and vitrified pipe may further comprise the steps:
(A) at the two ends of vitrified pipe inwall difference metallizing sealing slurry, carry out sintering, form the first metallic seal layer and the second metallic seal layer;
(B) applying the 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 the oxide seal slurry, make the two ends of the second metallic seal layer and air isolated;
(C) with the first metal tube and the welding of the first metallic seal layer, make the first metallic seal layer and air isolated; With 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 the described step (A), the temperature of described sintering is 1400 ~ 1600 ℃, and described sintering time is 50 ~ 70 minutes.
9. insulated enclosure method according to claim 7 is characterized in that, also is being included in nickel plating on the first metal layer and the second metal level after the step (A).
10. insulated enclosure method according to claim 7 is characterized in that, in the described step (C), the method for described welding is soldering, and the temperature of described soldering is 1000 ~ 1200 ℃.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103819213A (en) * | 2013-12-31 | 2014-05-28 | 吉世尔（合肥）能源科技有限公司 | Multi-layer brazing structure of metal and ceramic, and brazing method |
| CN112145824A (en) * | 2019-06-28 | 2020-12-29 | 国家能源投资集团有限责任公司 | Pipe fitting joint sealing structure and joint protection method |
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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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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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103819213A (en) * | 2013-12-31 | 2014-05-28 | 吉世尔（合肥）能源科技有限公司 | Multi-layer brazing structure of metal and ceramic, and brazing method |
| CN103819213B (en) * | 2013-12-31 | 2015-11-25 | 吉世尔（合肥）能源科技有限公司 | A kind of metal and ceramic multi-layered brazing structure and method for welding |
| CN112145824A (en) * | 2019-06-28 | 2020-12-29 | 国家能源投资集团有限责任公司 | Pipe fitting joint sealing structure and joint protection method |
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| Publication number | Publication date |
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| CN103058700B (en) | 2014-11-05 |
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