CN214698693U - Screw-fastened connection electric field shielding cap structure - Google Patents
Screw-fastened connection electric field shielding cap structure Download PDFInfo
- Publication number
- CN214698693U CN214698693U CN202120280718.6U CN202120280718U CN214698693U CN 214698693 U CN214698693 U CN 214698693U CN 202120280718 U CN202120280718 U CN 202120280718U CN 214698693 U CN214698693 U CN 214698693U
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- Prior art keywords
- nut
- shielding cap
- screw
- electric field
- main body
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- Expired - Fee Related
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- 230000005684 electric field Effects 0.000 title claims abstract description 21
- 239000004065 semiconductor Substances 0.000 claims abstract description 25
- 239000012790 adhesive layer Substances 0.000 claims description 4
- 229910018503 SF6 Inorganic materials 0.000 abstract description 5
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 abstract description 5
- 229960000909 sulfur hexafluoride Drugs 0.000 abstract description 5
- 230000015556 catabolic process Effects 0.000 abstract description 4
- 238000012797 qualification Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract 2
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000009413 insulation Methods 0.000 description 6
- 239000004020 conductor Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005685 electric field effect Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
本实用新型涉及一种螺钉紧固联接电场屏蔽帽结构，包括螺钉主体、螺母和半导体橡胶屏蔽帽，该螺钉主体的一端为平圆头，另一端形成螺母安装端，所述的螺母安装在螺钉主体上，并接近所述的螺母安装端；该螺母与螺母安装端之间的螺杆主体上是螺纹区。本实用新型的优点是：解决了小空间内高电压螺纹连接的局部放电和尖端闪络击穿的问题，在六氟化硫气体绝缘高压开关设备及环保气体绝缘高压电器中广泛应用，大大减小了开关设备的局部放电水平，提高了高压电器产品的合格率。
The utility model relates to a screw-fastened and connected electric field shielding cap structure, comprising a screw main body, a nut and a semiconductor rubber shielding cap. One end of the screw main body is a flat round head, and the other end forms a nut mounting end, and the nut is mounted on the screw on the main body, and close to the nut installation end; the screw main body between the nut and the nut installation end is a threaded area. The advantages of the utility model are: it solves the problems of partial discharge and tip flashover breakdown of high-voltage threaded connections in small spaces, is widely used in sulfur hexafluoride gas-insulated high-voltage switchgear and environmental protection gas-insulated high-voltage electrical appliances, and greatly reduces the The partial discharge level of switchgear is reduced, and the qualification rate of high-voltage electrical products is improved.
Description
Technical Field
The utility model relates to a screw fastening hookup electric field shielding cap structure relates to the high-voltage electric field.
Background
In high-voltage electrical equipment, high-potential conductors are fastened and connected by threads to realize electrical conduction. Under the action of high voltage, particularly in sulfur hexafluoride gas-insulated or environment-friendly gas-insulated high-voltage switchgear, the screw-fastening connection causes the fastening nut and the end screw to generate a tip electric field. Under the action of surge overvoltage, the tip electric field can generate partial discharge and even cause flashover breakdown of insulation, so that short-circuit fault of a power system is caused. Therefore, in the gas insulated switchgear in the sealed state, it is important to equalize the electric field
SUMMERY OF THE UTILITY MODEL
For overcoming prior art's defect, the utility model provides a screw fastening hookup electric field shielding cap structure, the technical scheme of the utility model is:
a structure for fastening and connecting an electric field shielding cap by a screw comprises a screw main body, a nut and a semiconductor rubber shielding cap, wherein one end of the screw main body is a flat round head, the other end of the screw main body forms a nut mounting end, and the nut is mounted on the screw main body and is close to the nut mounting end; the screw body between the nut and the nut mounting end is a threaded area, and the semiconductor rubber shielding cap is sleeved on the periphery of the nut and the nut mounting end and forms an equipotential uniform electric field with the nut and the nut mounting end.
The inner wall of the semiconductor rubber shielding cap is coated with a rubber adhesive layer, and the semiconductor rubber shielding cap is bonded with the nut mounting end when being sleeved on the periphery of the nut mounting end.
And when the semiconductor rubber shielding cap is sleeved on the periphery of the nut, the semiconductor rubber shielding cap is in interference fit with the nut.
The semiconductor rubber shielding cap comprises a rubber main body, and a mounting groove matched with the nut is arranged in the rubber main body.
The mounting groove is in cylindrical arrangement.
The mounting grooves are arranged in a step shape.
The utility model has the advantages that:
the problems of local discharge and sharp-end (thread mounting end) flashover breakdown of high-voltage threaded connection in a small space are solved, and the method is widely applied to sulfur hexafluoride gas-insulated high-voltage switchgear and environment-friendly gas-insulated high-voltage electrical appliances, so that the local discharge level is greatly reduced, and the product yield is improved.
Drawings
Fig. 1 is a schematic view of a main structure used in the present invention.
Fig. 2 is a sectional view of the main structure of the first embodiment of the semiconductor rubber shield cap of the present invention.
Fig. 3 is a sectional view of the main structure of a second embodiment of the semiconductor rubber shield cap of the present invention.
Detailed Description
The invention will be further described with reference to specific embodiments, the advantages and features of the invention will become more apparent as the description proceeds. These examples are merely illustrative and do not limit the scope of the invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications are intended to be included within the scope of the invention.
Referring to fig. 1 to 3, the utility model relates to a screw fastening connection electric field shielding cap structure, which comprises a screw main body 4, a nut 7 and a semiconductor rubber shielding cap 1, wherein one end of the screw main body 4 is a flat round head, the other end forms a nut mounting end 3, the nut 7 is mounted on the screw main body 4 and is close to the nut mounting end 3; the screw body between the nut 7 and the nut mounting end 3 is a threaded area, and the semiconductor rubber shielding cap 1 is sleeved on the peripheries of the nut 7 and the nut mounting end 3 and forms an equipotential uniform electric field with the nut 7 and the nut mounting end 3.
The inner wall of the semiconductor rubber shielding cap 1 is coated with a rubber adhesive layer, and the semiconductor rubber shielding cap 1 is bonded with the nut 7 and the nut mounting end 3 through the rubber adhesive layer when being sleeved on the periphery of the nut mounting end 3.
When the semiconductor rubber shielding cap 1 is sleeved on the periphery of the nut 7, the semiconductor rubber shielding cap is in interference fit with the nut 7.
The semiconductor rubber shielding cap 1 comprises a rubber main body, and a mounting groove 2 matched with a nut is arranged in the rubber main body.
As shown in fig. 2, the mounting groove 2 is disposed in a cylindrical shape.
As shown in fig. 3, the mounting groove 2 is arranged in a step shape.
The utility model discloses a theory of operation is:
when the first conductor 5 and the second conductor 6 are connected together through the screw rod main body, the semiconductor rubber shielding cap is sleeved on the periphery of the nut and the nut mounting end, so that the semiconductor rubber shielding cap and the parallel opposite side of the nut form interference fit, the rubber elastic holding force is utilized to tightly buckle the nut and the nut mounting end, and a shielded equipotential uniform spherical electric field is formed between the nut and the nut mounting end, so that the problems of local discharge and tip flashover breakdown of high-voltage threaded connection in a small space are solved. The sulfur hexafluoride gas insulation high-voltage switch gear is widely applied to sulfur hexafluoride gas insulation high-voltage switch gear and environment-friendly gas insulation high-voltage electric appliances. It is expanded to push away, can also be arranged in solid insulation or solid-gas composite insulation high voltage apparatus, also can pass through the utility model discloses improve the whole partial discharge level of high voltage apparatus product, improve the qualification rate of high voltage apparatus product electrical insulation performance test, and then improve the partial discharge performance under the high-voltage electric field effect, improve high voltage apparatus's most advanced flashover voltage level.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. A structure for fastening and connecting an electric field shielding cap by a screw is characterized by comprising a screw main body, a nut and a semiconductor rubber shielding cap, wherein one end of the screw main body is a flat round head, the other end of the screw main body forms a nut mounting end, and the nut is mounted on the screw main body and is close to the nut mounting end; the screw body between the nut and the nut mounting end is a threaded area, and the semiconductor rubber shielding cap is sleeved on the periphery of the nut and the nut mounting end and forms an equipotential uniform electric field with the nut and the nut mounting end.
2. The structure of the electric field shielding cap for screw fastening and connection as claimed in claim 1, wherein the inner wall of the semiconductor rubber shielding cap is coated with a rubber adhesive layer, and the semiconductor rubber shielding cap is adhered to the nut mounting end when being sleeved on the periphery of the nut mounting end.
3. The structure of the electric field shielding cap for screw fastening connection according to claim 1 or 2, wherein the semiconductor rubber shielding cap is in interference fit with the nut when being sleeved on the periphery of the nut.
4. The structure of the electric field shielding cap for screw fastening connection according to claim 3, wherein the semiconductor rubber shielding cap comprises a rubber body, and a mounting groove matched with the nut is arranged in the rubber body.
5. The electric field shielding cap structure for screw fastening according to claim 4, wherein the mounting groove is formed in a cylindrical shape.
6. The electric field shielding cap structure for screw fastening according to claim 4, wherein the mounting groove is stepped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120280718.6U CN214698693U (en) | 2021-02-01 | 2021-02-01 | Screw-fastened connection electric field shielding cap structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120280718.6U CN214698693U (en) | 2021-02-01 | 2021-02-01 | Screw-fastened connection electric field shielding cap structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214698693U true CN214698693U (en) | 2021-11-12 |
Family
ID=78565789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120280718.6U Expired - Fee Related CN214698693U (en) | 2021-02-01 | 2021-02-01 | Screw-fastened connection electric field shielding cap structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214698693U (en) |
-
2021
- 2021-02-01 CN CN202120280718.6U patent/CN214698693U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211112 |