CN204289242U - Two seal structures of a kind of vacuum switch tube ceramic package and metal sealing - Google Patents
Two seal structures of a kind of vacuum switch tube ceramic package and metal sealing Download PDFInfo
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- CN204289242U CN204289242U CN201420847560.6U CN201420847560U CN204289242U CN 204289242 U CN204289242 U CN 204289242U CN 201420847560 U CN201420847560 U CN 201420847560U CN 204289242 U CN204289242 U CN 204289242U
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- sealing ring
- double
- ceramic
- deck
- vacuum switch
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Abstract
Two seal structures of a kind of vacuum switch tube ceramic package and metal sealing, overcoming prior art sealing ring is column thin-walled individual layer annulus, sealing strength is low, poor reliability, can not meet Large Copacity, high voltage, the problem of the vacuum switch tube sealing ring Structural strength calls that quality is heavy, feature is that the ceramic metallization end face of ceramic case welds with adopting contour double-deck sealing ring or not contour double-deck sealing ring between end casing, beneficial effect is, metal is increased to two with the sealing surface of pottery by one, sealing-in area is large, effectively solve the topmost quality problems of the vacuum switch tube of the vacuum failure brought due to the gas leakage of ceramicto-metal seal position, improve vacuum switchgear reliability of operation, to meet drop-out current be 50kA and above Large Copacity and voltage be 40.5kV and above and product quality is the airtight reliability of high voltage vacuum switch pipe product of 10 ~ 50kg and the requirement of higher sealing structure mechanical strength.
Description
Technical field
The utility model belongs to vacuum switch tube ceramicto-metal seal technical field, is particularly two seal structures of a kind of vacuum switch tube ceramic package and metal sealing.
Background technology
Pottery must carry out reliably sealing-in with metal as the sheathing material of vacuum switch tube (vacuum interrupter).The mode of usual soldering makes pottery and metal end-blocking cover plate link together.For this reason, pottery end face must carry out metalized, then by metal sealing ring, ceramic end face and metal end are linked together, material, the shape and size of metal sealing ring must meet specific requirement, need the strict match condition controlling sealing ring metal material and ceramic expansion coefficient, rationally determine thickness and the height of metal sealing ring.In prior art, its sealing ring shape as shown in Figure 1, is column thin-walled individual layer annulus, wall thickness≤1mm, highly about 10mm.The basic demand of sealing-in mainly contains 2 points, and one is excellent air-tightness, and its vacuum life is not less than 20 years; Two is sufficient sealing strengths, can tolerate stress of sealing, thermal shock stress and mechanically actuated operation stress, at least keeps not losing efficacy for 20 years.Current specified vacuum switching tube ceramic and metal jointing tensile strength is 60 ~ 80MPa, the column thin-walled individual layer annulus of above-mentioned prior art can meet the demands for small-sized vacuum switch tube, but, for 50kA and above Large Copacity and 40.5kV and above high voltage vacuum switch pipe product, product quality is 10 ~ 50kg about, switching impulse power is very large, for this series products, the sealing ring structural strength of column thin-walled individual layer annulus is obviously not enough, in addition the factor affecting ceramicto-metal seal tensile strength is a lot, the such as granularity of pottery, amount of glassy phase, the preparation of metallization cream and coating, soldering processes, pottery mates with metal, the design etc. of metal sealing ring is all strong correlation item, and process control difficulties is large, inconvenient direct-detection again, thus there is higher dispersiveness in the tensile strength of ceramicto-metal seal always, the vacuum failure rate of vacuum switch tube product is caused still to be in a higher level.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art part, there is provided and can improve the airtight reliability in ceramic and metal jointing position, strengthen its structural strength, to be applicable to Large Copacity, high voltage, a kind of vacuum switch tube ceramic package of requirement of vacuum switch tube structural strength that volume is larger and two seal structures of metal sealing.
The technical solution adopted in the utility model comprises end casing, ceramic case and ceramic metallization end face, and the ceramic metallization end face of described ceramic case welds with adopting double-deck sealing ring between end casing.
Described double-deck sealing ring is contour double-deck sealing ring, and two end faces up and down of described contour double-deck sealing ring are all plane, and 2 of contour double-deck sealing ring wait epipodium lower surfaces double-deckly to hold the two seal structures sealed with being welded to form with ceramic metallization end face.
Described double-deck sealing ring is not contour double-deck sealing ring, the upper surface of described not contour double-deck sealing ring is plane, the lower surface skin of not contour double-deck sealing ring cuts one section and is formed and do not wait the outer lower surface of epipodium and the epipodium internal layer outer cylinder such as not, the ceramic metallization end face welding ends of the outer lower surface of epipodium and ceramic case is not waited to seal, epipodium internal layer outer cylinder is not waited to weld sleeve with the metallization end face of the port inner cylinder of ceramic case, the composition end envelope two seal structures that seal two with sleeve.
The wall thickness of described contour double-deck sealing ring is 0.5 ~ 0.7mm.
The wall thickness of described not contour double-deck sealing ring is 0.5 ~ 0.7mm, and the height not waiting epipodium internal layer outer cylinder is 3 ~ 5mm.
Compared with prior art, the beneficial effects of the utility model are, adopt contour double-deck sealing ring or not contour double-deck sealing ring, metal is made to be increased to two with the sealing surface of pottery by one, test proves, contour double-deck sealing ring sealing-in area adds one times, tensile strength also just obtains lifting at double, the internal layer of not contour double-deck sealing ring and the position of the sealing-in of pottery are by end face and end face, become outer cylinder and inner cylinder, test proves, sealing-in area can reach more than 5 times of end face sealing-in, and the Impact direction of solder side there occurs the change of 90 degree, pulling force becomes shearing force, the multiple that its tensile strength improves will obviously be greater than the multiple of sealing-in area increase, effectively solve the topmost quality problems of the vacuum switch tube of the vacuum failure brought due to the gas leakage of ceramicto-metal seal position, improve vacuum switchgear reliability of operation, to meet drop-out current be 50kA and above Large Copacity and voltage be 40.5kV and above and product quality is the airtight reliability of high voltage vacuum switch pipe product of 10 ~ 50kg and the requirement of higher sealing structure mechanical strength, so, sealing structure air-tightness of the present utility model is good, mechanical strength is high, anti-impact force is strong.
accompanying drawing illustrates:
Fig. 1 is prior art individual layer sealing ring sealing-in typical structure schematic diagram,
Fig. 2 is the contour double-deck sealing ring sealing structure schematic diagram of the utility model,
Fig. 3 is the vertical envelope of the not contour double-deck sealing ring of the utility model and sleeve sealing structure schematic diagram.，
Fig. 4 is the schematic diagram of the contour double-deck sealing ring of the utility model
Fig. 5 is the schematic diagram of the not contour double-deck sealing ring of the utility model
Fig. 6 is three kinds of sealing structure test for tensile strength statistics comparison diagrams.
In figure:
1. end casing,
2. individual layer sealing ring,
3. ceramic metallization end face,
4. ceramic case,
5. contour double-deck sealing ring,
The epipodium upper surfaces such as 5-1.,
The epipodium lower surfaces such as 5-2.,
6. not contour double-deck sealing ring,
6-1. does not wait epipodium upper surface,
6-2. does not wait the outer lower surface of epipodium, and 6-3. does not wait epipodium internal layer outer cylinder.
Embodiment
Embodiment 1
As shown in Figure 2 and Figure 4, the utility model comprises end casing 1, ceramic case 4 and ceramic metallization end face 3, welded steel double sealing ring between the ceramic metallization end face 3 and end casing 1 of ceramic case 4, described double-deck sealing ring is contour double-deck sealing ring 5, wherein, the ceramic metallization end face 3 of ceramic case 4 and the sealing-in of double-deck sealing ring in a vacuum soldering complete, two end faces up and down of described contour double-deck sealing ring 5 are all plane, the epipodium upper surface of waiting of contour double-deck sealing ring 5 is welded with end casing 1 with 5-1, 2 epipodium lower surface 5-2 such as grade of contour double-deck sealing ring 5 and ceramic metallization end face 3 are welded to form bilayer and hold the two seal structures sealed, owing to adopting two seal structure, the wall thickness of described contour double-deck sealing ring 5 can thin compared with individual layer sealing ring 30% ~ 50%,
The wall thickness of described contour double-deck sealing ring 5 is specially 0.5 ~ 0.7mm, like this, not only can ensure the mechanical strength of sealing ring, stress of sealing can also be made smaller.
Embodiment 2
As shown in Figure 3 and Figure 5, the utility model comprises end casing 1, ceramic case 4 and ceramic metallization end face 3, welded steel double sealing ring between the ceramic metallization end face 3 and end casing 1 of ceramic case 4, described double-deck sealing ring is not contour double-deck sealing ring 6, the epipodium upper surface 6-1 such as not grade of described not contour double-deck sealing ring 6 is plane, lower surface skin cuts one section, formed and do not wait the outer lower surface 6-2 of epipodium and the epipodium internal layer outer cylinder 6-3 such as not, the described height not waiting epipodium internal layer outer cylinder 6-3 is 3 ~ 5mm, epipodium upper surface 6-1 is not waited to weld with end casing 1, ceramic metallization end face 3 welding ends of the outer lower surface 6-2 of epipodium and ceramic case 4 is not waited to seal, epipodium internal layer outer cylinder 6-3 is not waited to weld sleeve with the metallization end face 3 of the port inner cylinder of ceramic case 4, the composition end envelope two seal structures that seal two with sleeve, wherein, the ceramic metallization end face 3 of ceramic case 4 and the sealing-in of double-deck sealing ring in a vacuum soldering complete, should notice that the grinding of ceramic case port inner cylinder is highly greater than the engagement height with sealing ring, owing to adopting the two two seal structures sealed of end envelope and sleeve, the wall thickness of described not contour double-deck sealing ring 6 can thin compared with individual layer sealing ring 30% ~ 50%, the wall thickness of described not contour double-deck sealing ring 6 is specially 0.5 ~ 0.7mm, like this, not only can ensure the mechanical strength of sealing ring, stress of sealing can also be made smaller.
The preparation method of double-deck sealing ring described in the utility model adopts following steps:
The first step, once blanking punched draw dark.Choose the Soft state band of thickness at below 1mm, as 4J33 can cut down, CuNi alloy, FeNi alloy, TU1 oxygen-free copper or SUS316L stainless steel, blanking draws deeply;
Second step, two times punch draws deeply.Once blanking punched to draw on dark basis more counter draw dark;
3rd step, the end, is cut in trimming.Drawing dark basis at two times punch gets on the bus to design size, two kinds of sealing rings can be processed into, the first is contour double-deck sealing ring as shown in Figure 4, the second is not contour double-deck sealing ring as shown in Figure 5, for contour double-deck sealing ring, must guarantee in Vehicle Processing process that two lower surface 5-2 are in a plane, so far sealing ring manufacture completes.
Fig. 6 is three kinds of sealing structure test for tensile strength statistics comparison diagrams, and in figure, abscissa is sample group number, and ordinate is tensile strength MPa, and sample is divided into one, two, three, four, five totally five groups, and each group has 3 samples, wherein symbol "." be individual layer sealing ring sample, symbol " " is double-deck contour sealing ring sample, symbol " △ " is the not contour sealing ring sample of bilayer, as shown in Figure 6, the result of the test of five groups represents, the tensile strength of the individual layer sealing ring sample of prior art is 62 ~ 90MPa, the utility model is owing to adopting contour double-deck sealing ring or not contour double-deck sealing ring, metal is made to be increased to two with the sealing surface of pottery by one, double-deck contour sealing ring sample tensile strength is 180 ~ 205MPa, bilayer not contour sealing ring sample tensile strength is 195 ~ 210MPa, test proves, contour double-deck sealing ring sealing-in area adds one times, tensile strength also just obtains lifting at double, internal layer and the position of the sealing-in of pottery of not contour double-deck sealing ring adopt to hold seals two two seal structures sealed with sleeve, sealing-in area can reach 4 ~ 7 times of end face sealing-in, and the Impact direction of solder side there occurs the change of 90 degree, pulling force becomes shearing force, its tensile strength obtains larger raising.
Claims (5)
1. two seal structures of a vacuum switch tube ceramic package and metal sealing, comprise end casing (1), ceramic case (4) and ceramic metallization end face (3), it is characterized in that, the ceramic metallization end face (3) of described ceramic case (4) adopts double-deck sealing ring to weld with between end casing (1).
2. two seal structures of a kind of vacuum switch tube ceramic package and metal sealing according to claim 1, it is characterized in that, described double-deck sealing ring is contour double-deck sealing ring (5), two end faces up and down of described contour double-deck sealing ring (5) are all plane, and 2 epipodium lower surfaces such as grade of contour double-deck sealing ring (5) are welded to form bilayer with (5-2) with ceramic metallization end face (3) and hold the two seal structures sealed.
3. two seal structures of a kind of vacuum switch tube ceramic package and metal sealing according to claim 1, it is characterized in that, described double-deck sealing ring is not contour double-deck sealing ring (6), the upper surface of described not contour double-deck sealing ring (6) is plane, the lower surface skin of not contour double-deck sealing ring (6) cuts one section and is formed and do not wait the outer lower surface (6-2) of epipodium and the epipodium internal layer outer cylinder (6-3) such as not, the outer lower surface (6-2) of epipodium is not waited to seal with ceramic metallization end face (3) welding ends of ceramic case (4), epipodium internal layer outer cylinder (6-3) is not waited to weld sleeve with the metallization end face (3) of the port inner cylinder of ceramic case (4), the composition end envelope two seal structures that seal two with sleeve.
4. two seal structures of a kind of vacuum switch tube ceramic package and metal sealing according to claim 2, it is characterized in that, the wall thickness of described contour double-deck sealing ring (5) is 0.5 ~ 0.7mm.
5. two seal structures of a kind of vacuum switch tube ceramic package and metal sealing according to claim 3, it is characterized in that, the wall thickness of described not contour double-deck sealing ring (6) is 0.5 ~ 0.7mm, and the height not waiting epipodium internal layer outer cylinder (6-3) is 3 ~ 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420847560.6U CN204289242U (en) | 2014-12-29 | 2014-12-29 | Two seal structures of a kind of vacuum switch tube ceramic package and metal sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420847560.6U CN204289242U (en) | 2014-12-29 | 2014-12-29 | Two seal structures of a kind of vacuum switch tube ceramic package and metal sealing |
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| Publication Number | Publication Date |
|---|---|
| CN204289242U true CN204289242U (en) | 2015-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420847560.6U Expired - Fee Related CN204289242U (en) | 2014-12-29 | 2014-12-29 | Two seal structures of a kind of vacuum switch tube ceramic package and metal sealing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104576174A (en) * | 2014-12-29 | 2015-04-29 | 沈阳华德海泰电子有限公司 | Ceramic package and metal double-sealing structure for vacuum switch tube |
-
2014
- 2014-12-29 CN CN201420847560.6U patent/CN204289242U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104576174A (en) * | 2014-12-29 | 2015-04-29 | 沈阳华德海泰电子有限公司 | Ceramic package and metal double-sealing structure for vacuum switch tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20151229 |
|
| EXPY | Termination of patent right or utility model |