CN203871156U - Sealing device of transformer bushing - Google Patents
Sealing device of transformer bushing Download PDFInfo
- Publication number
- CN203871156U CN203871156U CN201420255074.5U CN201420255074U CN203871156U CN 203871156 U CN203871156 U CN 203871156U CN 201420255074 U CN201420255074 U CN 201420255074U CN 203871156 U CN203871156 U CN 203871156U
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- cushion block
- pressing plate
- sealing ring
- sealing
- conducting rod
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Abstract
The utility model discloses a sealing device of a transformer bushing which comprises a porcelain sleeve, a conductive rod, a spacer and a first sealing ring, wherein the porcelain sleeve sleeves the conductive rod and is fixedly connected to an outer side of the conductive rod; the spacer is fixedly connected to the conductive rod and the spacer is located above the porcelain sleeve; a bottom face of the spacer is provided with a first sealing groove; the first sealing ring is located in the first sealing groove; and the bottom face of the first sealing ring is pressed against on the top face of the porcelain sleeve. The sealing performance of the transformer bushing can be increased by the sealing device of the transformer bushing.
Description
Technical field
The utility model belongs to field transformer, relates to a kind of sealing device of bushing shell for transformer.
Background technology
Along with the development of power industry, the continuous renewal of insulating material, the gas of usining is used in a lot of occasions because of its reliable insulation property as the transformer of dielectric, for the pure porcelain casing tube of its 12 supporting ~ 40.5kV is also born thereupon.The service time of gas change sleeve pipe is not long, is mainly the structural design with reference to oil filled bushing in design, and the main seal point of sleeve pipe of this structure is many, unreasonable structure, can not bear too high gas pressure, product long time stability cannot guarantee, especially at seal aspect.
Conventional SF6 gas pure porcelain casing tube is still done a step at the upper porcelain mouth of insulator, a ring washer that is greater than porcelain mouth step internal diameter and is less than insulator maximum inner diameter is set on conducting rod, a cushion pad is put in ring washer upper end, conducting rod is in the step place location of upper porcelain mouth, and the lower porcelain mouth that the insulating part by lower end is stuck in insulator is fixed on conducting rod at the center of insulator.The head of sleeve pipe is located through conducting rod sealing ring, packing ring, sealing ring, pressing plate and nut successively at upper porcelain mouth place, by screwing nut, conducting rod is strained, and by all sealing ring compressions, guarantees sealing simultaneously.This place only guarantees decrement and the sealing of sealing ring by the size of sleeve pipe head nut tightening force, it is very insecure being used for sealing SF6 gas.First with two sealing rings, seal different positions, product just has two breakthroughs, has increased the probability of seepage.Secondly, these two sealing rings are all that the power of coming by nut indirect transfer makes its compression, adopt the mode of the power of borrowing sealing, and the stressing conditions of sealing ring and decrement are all difficult to control.
Summary of the invention
technical problem:technical problem to be solved in the utility model is: a kind of hermetically-sealed construction of bushing shell for transformer is provided, improves the sealing property of bushing shell for transformer.
technical scheme:for solving the problems of the technologies described above, the technical solution adopted in the utility model is:
A sealing device for bushing shell for transformer, sealing device comprises insulator, conducting rod, cushion block and the first sealing ring; Insulator is set with and is fixedly connected on conducting rod outside, cushion block is fixedly connected on conducting rod, and cushion block is positioned at insulator top, and the bottom surface of cushion block is provided with the first seal groove, the first sealing ring is arranged in the first seal groove, and the bottom surface of the first sealing ring is against on the end face of insulator.
Further, described cushion block and conducting rod are by being welded to connect.
Further, also comprise pressing plate, pressing plate is positioned at cushion block top, and pressing plate is fixedly connected on cushion block, and the internal face top of cushion block has dead slot, and the internal face bottom of pressing plate has dead slot; The dead slot of cushion block and the dead slot of pressing plate communicate, and form the second seal groove; In the second seal groove, be provided with the second sealing ring.
Further, also comprise pressing plate, pressing plate is positioned at cushion block top, and pressing plate is fixedly connected on cushion block; The internal face top of cushion block has dead slot, and the internal face bottom of pressing plate has dead slot; The dead slot of cushion block and the dead slot of pressing plate communicate, and form the second seal groove; In the second seal groove, be provided with the second sealing ring; The internal face of described cushion block is provided with internal thread, and the outside wall surface of conducting rod is provided with the external screw thread matching with cushion block internal thread, and cushion block and conducting rod are threaded connection.
beneficial effect:compared with prior art, the technical solution of the utility model has good sealing property.The sealing device of bushing shell for transformer of the present utility model, is provided with the first seal groove in the bottom surface of cushion block, and the first sealing ring is set in the first seal groove, and the bottom surface of the first sealing ring is against on the end face of insulator.By screwing bolt, the first sealed ring deformation between insulator and cushion block is compressed, inside pipe casing and outside seal are got up.The direct stressed sealing of the first sealing ring, sealing is reliable, and can not be subject to the impact of the swollen shrinkage of product heat.In addition, sealing device can also arrange the second seal groove between cushion block, pressing plate and conducting rod.The second sealing ring is set in the second seal groove.By tighting a bolt, pressing plate is strained, compressed the second sealing ring simultaneously.The second sealing encloses the effect of auxiliary seal, can strengthen the reliability of product.
Accompanying drawing explanation
Fig. 1 is the structural representation of sealing device of the present utility model.
In figure, have: insulator 1, conducting rod 2, cushion block 3, the first sealing ring 4, the first seal groove 5, the second sealing ring 6, pressing plate 7, the second seal groove 8.
Embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is described in further detail.
As shown in Figure 1, the sealing device of a kind of bushing shell for transformer of the present utility model, comprises insulator 1, conducting rod 2, cushion block 3 and the first sealing ring 4.Insulator 1 is set with and is fixedly connected on conducting rod 2 outsides.Cushion block 3 is fixedly connected on conducting rod 2, and cushion block 3 is positioned at insulator 1 top.The bottom surface of cushion block 3 is provided with the first seal groove 5.The first sealing ring 4 is arranged in the first seal groove 5, and the bottom surface of the first sealing ring 4 is against on the end face of insulator 1.
For enhanced leaktightness, cushion block 3 and conducting rod 2 are by being welded to connect.Further, pressing plate 7 is set above cushion block 3 again, pressing plate 7 is fixedly connected on cushion block 3, and the internal face top of cushion block 3 has dead slot, and the internal face bottom of pressing plate 7 has dead slot; The dead slot of the dead slot of cushion block 3 and pressing plate 7 communicates, and forms the second seal groove 8.In the second seal groove 8, be provided with the second sealing ring 6.7 pairs of the second sealing rings 6 of pressing plate are exerted pressure, and make to keep sealing between cushion block 3 and conducting rod 2.Cushion block 3 and conducting rod 2, by being welded to connect, arrange pressing plate 7 and the second sealing ring 6 above cushion block 3 again, improve sealing property.
Another kind of connection and hermetically-sealed construction are: pressing plate 7 is positioned at cushion block 3 tops, and pressing plate 7 is fixedly connected on cushion block 3; The internal face top of cushion block 3 has dead slot, and the internal face bottom of pressing plate 7 has dead slot; The dead slot of the dead slot of cushion block 3 and pressing plate 7 communicates, and forms the second seal groove 8; In the second seal groove 8, be provided with the second sealing ring 6.The internal face of cushion block 3 is provided with internal thread, and the outside wall surface of conducting rod 2 is provided with the external screw thread matching with cushion block 3 internal threads.Cushion block 3 is threaded connection with conducting rod 2, and by pressing plate 7 being set and having the second sealing ring 9, improves sealing property.
In the sealing device of said structure, cushion block 3 can be fixed together with the upper flange of insulator.In cushion block 3, be provided with interior placement the first sealing ring 4 of the first seal groove 5, the first seal groove 5.By the first sealing ring 4, between cushion block 3 and the plane of insulator 1 upper surface, seal.Between the flange of cushion block 3 and insulator 1, be bolted together, by screwing bolt, make the first sealing ring 4 distortion compressions between insulator 1 and cushion block 3, inside pipe casing and outside seal are got up.The direct stressed sealing of the first sealing ring 4, sealing is reliable, and can not be subject to the impact of the swollen shrinkage of product heat.
In the sealing device of said structure, the internal diameter lower end of cushion block 3 is provided with an oblique angle, makes to form between cushion block 3 and conducting rod 2 welding groove.In welding groove, with silver-bearing copper welding rod, be welded as a whole, do not use sealing ring, good sealing effect.On the second sealing ring 6, place a pressing plate 7, the lower surface of pressing plate 7 is provided with seal groove, and the internal diameter upper end of cushion block 3 is provided with another oblique angle, makes to form between cushion block 3, pressing plate 7 and conducting rod 2 the second seal groove 8.At interior second sealing ring 6 that arranges of the second seal groove 8.On pressing plate 7 and cushion block 3, be provided with the screwed hole cooperatively interacting, with bolt, by pressing plate 7 tensions, the second sealing ring 6, the second sealing rings 6 between clamping platen 7, cushion block 3 and conducting rod 2 play auxiliary seal simultaneously, can strengthen the reliability of product.
Below be only the specific embodiment of the invention.Those skilled in the art are according to foregoing, and any non-creativeness that this specific embodiment is made improves, and all belongs to the protection range of the invention.
Claims (4)
1. a sealing device for bushing shell for transformer, is characterized in that, sealing device comprises insulator (1), conducting rod (2), cushion block (3) and the first sealing ring (4); Insulator (1) is set with and is fixedly connected on conducting rod (2) outside, cushion block (3) is fixedly connected on conducting rod (2), and cushion block (3) is positioned at insulator (1) top, the bottom surface of cushion block (3) is provided with the first seal groove (5), the first sealing ring (4) is arranged in the first seal groove (5), and the bottom surface of the first sealing ring (4) is against on the end face of insulator (1).
2. according to the sealing device of bushing shell for transformer claimed in claim 1, it is characterized in that, described cushion block (3) and conducting rod (2) are by being welded to connect.
3. according to the sealing device of bushing shell for transformer claimed in claim 2, it is characterized in that, also comprise pressing plate (7), pressing plate (7) is positioned at cushion block (3) top, pressing plate (7) is fixedly connected on cushion block (3), the internal face top of cushion block (3) has dead slot, and the internal face bottom of pressing plate (7) has dead slot; The dead slot of the dead slot of cushion block (3) and pressing plate (7) communicates, and forms the second seal groove (8); In the second seal groove (8), be provided with the second sealing ring (6).
4. according to the sealing device of bushing shell for transformer claimed in claim 1, it is characterized in that, also comprise pressing plate (7), pressing plate (7) is positioned at cushion block (3) top, and pressing plate (7) is fixedly connected on cushion block (3); The internal face top of cushion block (3) has dead slot, and the internal face bottom of pressing plate (7) has dead slot; The dead slot of the dead slot of cushion block (3) and pressing plate (7) communicates, and forms the second seal groove (8); In the second seal groove (8), be provided with the second sealing ring (9); The internal face of described cushion block (3) is provided with internal thread, and the outside wall surface of conducting rod (2) is provided with the external screw thread matching with cushion block (3) internal thread, and cushion block (3) is threaded connection with conducting rod (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420255074.5U CN203871156U (en) | 2014-05-19 | 2014-05-19 | Sealing device of transformer bushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420255074.5U CN203871156U (en) | 2014-05-19 | 2014-05-19 | Sealing device of transformer bushing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203871156U true CN203871156U (en) | 2014-10-08 |
Family
ID=51652081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420255074.5U Expired - Lifetime CN203871156U (en) | 2014-05-19 | 2014-05-19 | Sealing device of transformer bushing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203871156U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108511166A (en) * | 2018-03-27 | 2018-09-07 | 山东电力设备有限公司 | A kind of attachment device for detecting deformation of transformer winding |
| CN108777222A (en) * | 2018-06-01 | 2018-11-09 | 江苏盖之宝包装科技有限公司 | A kind of bushing shell for transformer |
| CN111801753A (en) * | 2018-01-23 | 2020-10-20 | Abb电网瑞士股份公司 | Sealing device for sleeves and sleeves with such sealing device |
| CN112682581A (en) * | 2020-11-27 | 2021-04-20 | 平高集团有限公司 | Use wall bushing that can dismantle transportation and support |
-
2014
- 2014-05-19 CN CN201420255074.5U patent/CN203871156U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111801753A (en) * | 2018-01-23 | 2020-10-20 | Abb电网瑞士股份公司 | Sealing device for sleeves and sleeves with such sealing device |
| US11769611B2 (en) | 2018-01-23 | 2023-09-26 | Hitachi Energy Switzerland Ag | Sealing arrangement for a bushing and a bushing with such a sealing arrangement |
| CN108511166A (en) * | 2018-03-27 | 2018-09-07 | 山东电力设备有限公司 | A kind of attachment device for detecting deformation of transformer winding |
| CN108777222A (en) * | 2018-06-01 | 2018-11-09 | 江苏盖之宝包装科技有限公司 | A kind of bushing shell for transformer |
| CN112682581A (en) * | 2020-11-27 | 2021-04-20 | 平高集团有限公司 | Use wall bushing that can dismantle transportation and support |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141008 |