CN101471209B - Oil immersion type high-voltage and current-limitation fuse - Google Patents
Oil immersion type high-voltage and current-limitation fuse Download PDFInfo
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- CN101471209B CN101471209B CN2007101731610A CN200710173161A CN101471209B CN 101471209 B CN101471209 B CN 101471209B CN 2007101731610 A CN2007101731610 A CN 2007101731610A CN 200710173161 A CN200710173161 A CN 200710173161A CN 101471209 B CN101471209 B CN 101471209B
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- Prior art keywords
- metal cap
- fusion tube
- voltage
- current
- type high
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- 238000007654 immersion Methods 0.000 title claims description 24
- 239000002184 metal Substances 0.000 claims abstract description 67
- 230000004927 fusion Effects 0.000 claims abstract description 53
- 239000000565 sealant Substances 0.000 claims abstract description 20
- 239000000155 melt Substances 0.000 claims abstract description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000006004 Quartz sand Substances 0.000 claims abstract description 7
- 239000012530 fluid Substances 0.000 claims description 19
- 210000003205 muscle Anatomy 0.000 claims description 17
- 230000002787 reinforcement Effects 0.000 claims description 11
- 239000003292 glue Substances 0.000 claims description 5
- 239000010445 mica Substances 0.000 claims description 3
- 229910052618 mica group Inorganic materials 0.000 claims description 3
- 235000019994 cava Nutrition 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 27
- 230000006870 function Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- JDDUQGRUPLKDNT-IDTAVKCVSA-N (2r,3r,4s,5s)-2-(6-aminopurin-9-yl)-5-(2-methylpropylsulfanylmethyl)oxolane-3,4-diol Chemical compound O[C@@H]1[C@H](O)[C@@H](CSCC(C)C)O[C@H]1N1C2=NC=NC(N)=C2N=C1 JDDUQGRUPLKDNT-IDTAVKCVSA-N 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000036299 sexual function Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention discloses an oil-immersed high-tension current-limiting fuse which comprises a fusion tube, a frame and a melt. Both ends of the fusion tube of a cylindrical shape are respectively connected with a metal cap with a retaining nut thereon, and the fusion tube is filled with quartz sand. The frame is arranged in the fusion tube, which is provided with a locating groove for positioning the melt, and both ends of the frame are respectively fixedly provided with a conductive contact plate. The melt, which is of a band shape, uniformly clings around to the frame, and both ends of the melt are respectively connected with the conductive contact plate which is connected with the two metal caps. An O-shaped sealing ring is cased outside the connection part between each metal cap and both end openings of the fusion tube, and the cap opening of each metal cap is bound with the outer surfaces of both ends of the fusion tube by sealant. The outer surfaces of both ends of the fusion tube are provided with grooves, and the periphery of each metal cap is provided with a concave semicircle bar which is arranged in the grooves. The oil-immersed high-tension current-limiting fuse resolves such problem of fuse in prior act that sealing property of fuse is damaged because of loosing phenomenon between a metal cap and both ends of a melt under pressure of fuse.
Description
Technical field
The present invention relates to high voltage protective electrical equipment, relate in particular to oil immersion type high-voltage and current-limitation fuse.
Background technology
Oil immersion type high-voltage and current-limitation fuse is the important high voltage protective electrical equipment that is applied to high-tension transformer, is as the protection component of power transformer and other power equipment overload and short trouble in the electric power system.As shown in Figure 1, a kind of oil immersion type high-voltage and current-limitation fuse of the novel patent disclosure of implementation of China of the patent No. 03228044.0, this oil immersion type high-voltage and current-limitation fuse 10 comprises fusion tube 14, skeleton 11, melt 12.Fusion tube 14 is cylindric, and two ends respectively connect a metal cap 16, is provided with on the metal cap 16 to be filled with quartz sand 17 in the fusion tube 14 for the fixing threaded hole of busbar connection; Skeleton 11 places fusion tube 14, offering on the skeleton 11 can be for the location notch of melt location, and each fixes a conduction contact plate 13 skeleton 11 two ends, and melt 12 is band shape and is wound on the skeleton 11, melt 12 two ends are connected with conduction contact plate 13 respectively, conduction contact plate 13 joins with metal cap 16, metal cap 16 in and fusion tube 14 joints all sheathed " O " RunddichtringO 15, in addition, as can be seen from the figure, metal cap 16 is contraction-like, after placing fusion tube 14 two ends, is bonded and sealed with fluid sealant 18.When this oil immersion type high-voltage and current-limitation fuse uses in transformer oil, sealing ring 15 and fluid sealant 18 dual-seals are fresh-keeping have been guaranteed to isolate fully with transformer oil, by this two seals defence line of setting up, guaranteed the sealing of whole fuse, oil seepage phenomena can not appear, realized the oil seal sexual function, the needs of the American box combined transformer that is suitable for promoting day by day.
But also there is following shortcoming in actual use in this oil immersion type high-voltage and current-limitation fuse:
1, the cap oral area of metal cap is contraction-like, and only be connected with the fusion tube two ends by fluid sealant, but, high-voltage and current-limitation fuse has pressure in the fusion tube when work, metal cap is under the effect of fusion tube internal pressure, can get loose, destroy the sealing of fluid sealant between cap oral area and the fusion tube and the sealing of sealing ring, influence sealing effectiveness, oil immersion type high-voltage and current-limitation fuse is leaked.
2, the end insufficient strength of metal cap can produce the distortion outwards arch upward under the effect of fusion tube internal pressure, in case distortion, the quartz sand that tamps in fusion tube can be loose, and quartz sand loose can cause fuse to be blasted when current limliting is cut-off, and be accidents caused.
3, under the same connecting-disconnecting function situation, physical dimension is bigger than normal, can't satisfy the demand of existing market miniaturization.
Therefore, be necessary existing oil immersion type high-voltage and current-limitation fuse is improved, to overcome above-mentioned shortcoming.
Summary of the invention
Technical problem to be solved by this invention provides a kind of oil immersion type high-voltage and current-limitation fuse, and this fuse is under the effect of fusion tube internal pressure, and metal cap is connected the destruction that is difficult for getting loose and causes the fuse sealing with the fusing two ends.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of oil immersion type high-voltage and current-limitation fuse comprises fusion tube, skeleton, melt, and fusion tube is cylindric, and two ends connect a metal cap respectively; Be provided with the hold-down nut that connects for busbar on the metal cap, be filled with quartz sand in the fusion tube; Skeleton places fusion tube, offers the location notch for the melt location on the skeleton, and each fixes a conduction contact plate skeleton two ends; Melt is banded and evenly is around on the skeleton, the melt two ends are connected with the conduction contact plate respectively, conduction contact plate and metal cap join, interior and fusion tube two-port joint sheathed " O " RunddichtringO of described metal cap, and it is bonding with fluid sealant between the cap oral area of metal cap and fusion tube both ends outer surface, wherein: described fusion tube both ends outer surface has groove, has the semicircle muscle that caves on the metal cap periphery, and described semicircle muscle is matched with in the groove; Described metal cap end stamps out reinforcement.
Described groove rounds along the fusion tube end outer surface, and described semicircle muscle rounds along the metal cap periphery.
Adopt technique scheme, owing to the semicircle muscle on the metal cap can be snapped in the groove of fusion tube both ends outer surface, just make metal cap be difficult for getting loose under the fusion tube internal pressure condition being subjected to, avoid destroying fluid sealant sealing and sealing ring sealing between metal cap and the fusion tube, and there has been the semicircle muscle to make that the intensity of metal cap periphery is strengthened on the metal cap periphery, reduce the distortion of metal cap periphery, helped improving the sealing of fuse more.
In order further to improve the sealing of fuse, in further improvement of the present invention, it is bonding to establish structure glue between described groove and semicircle muscle.By between groove and semicircle muscle, being provided with structure glue, make fuse at original base on, triple seal has been arranged, improved the sealing of fuse more.
In order to improve the reliability of fluid sealant sealing, in further improvement of the present invention, the cap oral area of described metal cap is the expansion shape, forms the gap of filling for fluid sealant between the cap oral area of metal cap and fusion tube both ends outer surface.Because the cap oral area of metal cap is the expansion shape, just increased the gap between the cap oral area fusion tube both ends outer surface of metal cap, make and in the gap, fill more fluid sealant easily, effectively avoided partial points not have fluid sealant, improved the reliability of fluid sealant sealing.
Described reinforcement has four, and circumference array is distributed in the metal cap end surface.
And reinforcement extends to the root of hold-down nut always from the metal cap end edge.Like this, not only reinforcement has improved the intensity of metal cap end, and the flexural strength of the root of hold-down nut is also strengthened.
In order to be implemented under the same connecting-disconnecting function, the physical dimension of fuse is littler, and described skeleton is spliced by at least three cloudlet master slices.Preferred mica sheet has three.
By above-mentioned introduction, can find that oil immersion type high-voltage and current-limitation fuse of the present invention has under good sealing effect, the high and same connecting-disconnecting function of resistance to deformation intensity, the advantage of physical dimension minimum.
Description of drawings
The present invention is described in detail below in conjunction with the drawings and specific embodiments:
Fig. 1 is the structural representation of the oil immersion type high-voltage and current-limitation fuse of prior art.
Fig. 2 is the structural representation of oil-immersed and high-voltage current-limiting fusing of the present invention.
Fig. 3 is the end view of Fig. 2.
Embodiment
As shown in Figure 2, a kind of oil immersion type high-voltage and current-limitation fuse 20 of the present invention comprises fusion tube 14, skeleton 11, melt 12.
Wherein, fusion tube 14 is cylindric, and two ends are connected with metal cap 16 respectively; Be welded with the hold-down nut 21 that connects for busbar on the metal cap 16.Be filled with quartz sand 17 in the fusion tube 14; Skeleton 11 places fusion tube 14, offers the location notch 111 for melt 12 location on the skeleton 11, and skeleton 11 two ends respectively are fixed with conduction contact plate 13.Melt 12 is banded and has narrow strength 121.Banded melt 12 is evenly on skeleton 11.Melt 12 two ends are connected with conduction contact plate 13 respectively, conduction contact plate 13 and metal cap 16 welding.With fusion tube 14 two-port joints sheathed " O " RunddichtringO 15, and usefulness fluid sealant 18 is bonding between the cap oral area of metal cap 16 and fusion tube 14 both ends outer surfaces in metal cap 16.
Improvements of the present invention are, have the groove 141 that rounds at the both ends of fusion tube 14 outer surface, and roll out the semicircle muscle 161 that rounds on the periphery of metal cap 16, these semicircle muscle 161 cooperations snap in the groove 141, are undertaken bonding by structure glue 19 between groove 141 and semicircle muscle 161.Because semicircle muscle 161 can snap in the groove 141, just make metal cap 16 be subjected to fusion tube 14 internal pressures to be difficult at present getting loose on the one hand, fluid sealant sealing and sealing ring sealing between metal cap and the fusion tube have been avoided destroying, on the other hand, there has been semicircle muscle 161 to make that the intensity of metal cap periphery is strengthened on metal cap 16 peripheries, reduce the distortion of metal cap periphery, helped improving the sealing of fuse more.In addition, between groove 141 and semicircle muscle 161, be provided with structure glue 19, make fuse on the basis of original two seals, increase sealing together, be total to three seals, improved the sealing of fuse more.
In order to improve the reliability of fluid sealant sealing, the cap oral area 162 of metal cap 16 is designed to be the expansion shape, between the cap oral area 161 of metal cap 16 and fusion tube 14 both ends outer surfaces, just be formed with the gap, so just more fluid sealant 18 can be filled in this gap, just effectively avoid original partial points not have fluid sealant to cause the shortcoming of leakage, improved the reliability of fluid sealant sealing.
As shown in Figure 3, in order to improve the intensity of metal cap end, stamp out four reinforcements 163 in metal cap 16 ends, these four reinforcement 163 circumference array are distributed in metal cap 16 end surfaces, and four reinforcements 163 all extend to the root of hold-down nut 21 always from metal cap 16 end edge.Like this, not only reinforcement 163 has improved the intensity of metal cap 16 ends, and the flexural strength of the root of hold-down nut 21, and metal cap 16 ends again are not easy to arch upward, and has avoided the loose and possible accidents caused of fusion tube 14 interior quartz sands 17.
In addition, in order to be implemented under the same connecting-disconnecting function, the physical dimension of fuse is littler, and skeleton 11 is spliced by at least three cloudlet master slices.In the present invention, skeleton 11 adopts three cloudlet master slices to be spliced, and has so just strengthened the girth of melt individual pen coiling, and the size of fuse can be reduced, and adopt three cloudlet master slices when reducing the physical dimension of fuse, also help saving the cost that adopts mica sheet.As shown in the table, this is under same connecting-disconnecting function, the physical dimension of this fuse and the comparison of other like product.
| Performance index | Ai Fen Co., Ltd | SIBA company | The west is molten | This product |
| Rated voltage kV | 36? | 36? | 40.5? | 40.5? |
| Rated current A | 2～31.5 50～63? | 31.5～40 50～63 | 3.15～50? | 16～63? |
| Maximum drop-out current kA | 31.5 20? | 40? | 31.5? | 31.5? |
| Overall dimension (diameter * length) mm | φ56×537 φ88×537? | φ67×537 φ85×537? | φ76×650? | φ67×500? |
To detailed introduction of the present invention, as can be seen, oil immersion type high-voltage and current-limitation fuse of the present invention has under good sealing effect, the high and same connecting-disconnecting function of resistance to deformation intensity, the advantage of physical dimension minimum by above.
But, those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop on claim scope of the present invention to variation, the modification of the above embodiment.
Claims (8)
1. an oil immersion type high-voltage and current-limitation fuse comprises fusion tube, skeleton, melt, and fusion tube is cylindric, and two ends connect a metal cap respectively; Be provided with the hold-down nut that connects for busbar on the metal cap, be filled with quartz sand in the fusion tube; Skeleton places fusion tube, offers the location notch for the melt location on the skeleton, and each fixes a conduction contact plate skeleton two ends; Melt is banded and evenly is around on the skeleton, the melt two ends are connected with the conduction contact plate respectively, conduction contact plate and metal cap join, interior and fusion tube two-port joint sheathed " O " RunddichtringO of described metal cap, and it is bonding between the cap oral area of metal cap and fusion tube both ends outer surface with fluid sealant, it is characterized in that: described fusion tube both ends outer surface has groove, has the semicircle muscle that caves on the metal cap periphery, and described semicircle muscle is matched with in the groove; Described metal cap end stamps out reinforcement.
2. oil immersion type high-voltage and current-limitation fuse according to claim 1 is characterized in that: described groove rounds along the fusion tube end outer surface, and described semicircle muscle rounds along the metal cap periphery.
3. oil immersion type high-voltage and current-limitation fuse according to claim 1 is characterized in that: it is bonding to establish structure glue between described groove and semicircle muscle.
4. according to claim 1 or 3 described oil immersion type high-voltage and current-limitation fuses, it is characterized in that the cap oral area of described metal cap is the expansion shape, between the cap oral area of metal cap and fusion tube both ends outer surface, form the gap of filling for fluid sealant.
5. oil immersion type high-voltage and current-limitation fuse according to claim 1 is characterized in that: described reinforcement has four, and circumference array is distributed in the metal cap end surface.
6. oil immersion type high-voltage and current-limitation fuse according to claim 5 is characterized in that: described reinforcement extends to the root of hold-down nut always from the metal cap end edge.
7. oil immersion type high-voltage and current-limitation fuse according to claim 1 is characterized in that: described skeleton is spliced by at least three cloudlet master slices.
8. oil immersion type high-voltage and current-limitation fuse according to claim 7 is characterized in that: described mica sheet has three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101731610A CN101471209B (en) | 2007-12-26 | 2007-12-26 | Oil immersion type high-voltage and current-limitation fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101731610A CN101471209B (en) | 2007-12-26 | 2007-12-26 | Oil immersion type high-voltage and current-limitation fuse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101471209A CN101471209A (en) | 2009-07-01 |
| CN101471209B true CN101471209B (en) | 2011-05-11 |
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ID=40828563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101731610A Expired - Fee Related CN101471209B (en) | 2007-12-26 | 2007-12-26 | Oil immersion type high-voltage and current-limitation fuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101471209B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4166266A (en) * | 1978-03-06 | 1979-08-28 | Gould Inc. | Electric fuse having composite support for fusible element |
| US4274073A (en) * | 1976-12-30 | 1981-06-16 | Westinghouse Electric Corp. | Submersible fuse |
| US4628294A (en) * | 1985-11-22 | 1986-12-09 | A. B. Chance Company | End cap assembly for a fluid resistant electrical device |
| US5892427A (en) * | 1998-04-24 | 1999-04-06 | Cooper Technologies Company | Current limiting high voltage fuse |
| CN2598123Y (en) * | 2003-01-08 | 2004-01-07 | 上海电器陶瓷厂 | Oil immersed high-voltage current limiting fuse |
| CN201134400Y (en) * | 2007-12-26 | 2008-10-15 | 上海电器陶瓷厂有限公司 | Oil immersion type high-voltage and current-limitation fuse |
-
2007
- 2007-12-26 CN CN2007101731610A patent/CN101471209B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4274073A (en) * | 1976-12-30 | 1981-06-16 | Westinghouse Electric Corp. | Submersible fuse |
| US4166266A (en) * | 1978-03-06 | 1979-08-28 | Gould Inc. | Electric fuse having composite support for fusible element |
| US4628294A (en) * | 1985-11-22 | 1986-12-09 | A. B. Chance Company | End cap assembly for a fluid resistant electrical device |
| US5892427A (en) * | 1998-04-24 | 1999-04-06 | Cooper Technologies Company | Current limiting high voltage fuse |
| CN2598123Y (en) * | 2003-01-08 | 2004-01-07 | 上海电器陶瓷厂 | Oil immersed high-voltage current limiting fuse |
| CN201134400Y (en) * | 2007-12-26 | 2008-10-15 | 上海电器陶瓷厂有限公司 | Oil immersion type high-voltage and current-limitation fuse |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101471209A (en) | 2009-07-01 |
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Granted publication date: 20110511 |
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