CN203103056U - Transformer bushing end screen grounding device - Google Patents
Transformer bushing end screen grounding device Download PDFInfo
- Publication number
- CN203103056U CN203103056U CN 201220733392 CN201220733392U CN203103056U CN 203103056 U CN203103056 U CN 203103056U CN 201220733392 CN201220733392 CN 201220733392 CN 201220733392 U CN201220733392 U CN 201220733392U CN 203103056 U CN203103056 U CN 203103056U
- Authority
- CN
- China
- Prior art keywords
- end screen
- transformer
- transformer bushing
- bushing end
- grounding device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000005283 ground state Effects 0.000 description 3
- 239000012634 fragment Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
Images
Abstract
The utility model relates to a transformer bushing end screen grounding device. The transformer bushing end screen grounding device is characterized by comprising a double-head screw rod (3), threads are arranged at one end of the double-head thread rod (3), and therefore the one end of double-head thread rod is connected with the tail end of a bushing end screen; and two nuts are installed at the other end of the double-head screw rod (3), and a grounding wire is clamped between the two nuts (2). The transformer bushing end screen grounding device has the advantages that after the transformer bushing end screen is grounded, hidden safety hazards existing in the prior art are thoroughly eliminated, even the transformer bushing end screen grounding device is made to perform detaching and connecting operation in an on-site test, the transformer bushing end screen can also be guaranteed to be in a good and reliable grounding state, and therefore safe running and power supplying reliability of a transformer are improved, and meanwhile equipment accidents caused by the hidden safety hazards are avoided.
Description
Technical field
The utility model relates to a kind of bushing shell for transformer end screen earthing device.
Background technology
" Repair of Transformer rules " according to power department are learnt: after the bottom shielding of bushing ground connection, the voltage that capacitance graded bushing is born is uniformly distributed between each capacitor layers, as move earth-free, impedance between end screen and the flange becomes very big, make end screen voltage to earth raise, cause the end screen to the flange discharge, cause the sleeve pipe fault, will directly jeopardize the safe operation and the power supply reliability thereof of transformer.
Through for a long time transformer being overhauled, find that there is following potential safety hazard in part bushing end screen ground connection: shell fragment distortion, screw become flexible, shell fragment has breakage.Statistics sleeve pipe rack earth serviceability rate only is 67%, and the potential safety hazard rate is up to 33%.To improve transformer high-voltage bottom shielding of bushing ground connection reliability very urgent for this reason.Therefore, press for bushing shell for transformer end screen ground connection is improved to reach following two purposes: 1, no matter transformer is when operation or field test, can both guarantee that bottom shielding of bushing often is in well, ground state reliably; 2, make things convenient for the online monitoring data collection.
The utility model content
The purpose of this utility model provides a kind of bushing shell for transformer end screen earthing device, can guarantee that bottom shielding of bushing is in well for a long time, ground state reliably.
A kind of bushing shell for transformer end screen earthing device, its special feature is: comprise double threaded screw, be connected with the bottom shielding of bushing tail end thereby be provided with screw thread at an end of this double threaded screw, and the other end of this double threaded screw is equipped with two nuts, clamping has earth connection between these two nuts.
Wherein be equipped with and anti-ly send screw, thereby prevent that nut from coming off at the end of double threaded screw.
Wherein in the double threaded screw intermediate sleeve connector is housed, this connector removably connects by screw thread and outer cover, and described earth connection stretches out and ground connection in outer cover.
The beneficial effects of the utility model are: after adopting bushing shell for transformer of the present utility model end screen earthing device, thoroughly eliminated the potential safety hazard that in the past existed, even operation is torn, is connect in test open at the scene, can guarantee that also bottom shielding of bushing often is in well, ground state reliably, thereby improved the safe operation and the power supply reliability thereof of transformer, simultaneously also avoided potential safety hazard and the equipment breakdown that causes.
Description of drawings
Accompanying drawing 1 is a structural representation of the present utility model.
Embodiment
As shown in Figure 1, the utility model is a kind of bushing shell for transformer end screen earthing device, comprise double threaded screw 3, thereby being provided with screw thread at an end of this double threaded screw 3 is connected with the bottom shielding of bushing tail end, and the other end of this double threaded screw 3 is equipped with two nuts 2, and clamping has earth connection 4 between these two nuts 2.
Wherein be equipped with and anti-ly send screw, thereby prevent that nut 2 from coming off at the end of double threaded screw 3.In double threaded screw 3 intermediate sleeve connector 1 is housed in addition, this connector 1 removably connects by screw thread and outer cover 5, and described earth connection 4 stretches out and ground connection in outer cover 5.Connector 1 and outer cover 5 all adopt insulating material, for example plastics.
Using method of the present utility model is:
End with double threaded screw 3 during use is connected with the bottom shielding of bushing tail end, then earth connection 4 is stretched into the end stripping of insulatin part in the outer cover 5 and conductor part is wrapped between two nuts 2, screw nut 2 then and anti-ly send screw, again outer cover 5 is tightened on the connector 1 of double threaded screw 3 and gets final product.
Claims (3)
1. earthing device is shielded at a bushing shell for transformer end, it is characterized in that: comprise double threaded screw (3), at this double threaded screw (3) thus an end be provided with screw thread and be connected with the bottom shielding of bushing tail end, and the other end of this double threaded screw (3) is equipped with two nuts (2), and clamping has earth connection (4) between these two nuts (2).
2. a kind of bushing shell for transformer as claimed in claim 1 end screen earthing device is characterized in that: wherein be equipped with at the end of double threaded screw (3) and anti-ly send screw, thereby prevent that nut (2) from coming off.
3. a kind of bushing shell for transformer as claimed in claim 1 or 2 end screen earthing device, it is characterized in that: wherein connector (1) is housed in double threaded screw (3) intermediate sleeve, this connector (1) removably connects by screw thread and outer cover (5), and described earth connection (4) stretches out and ground connection in outer cover (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220733392 CN203103056U (en) | 2012-12-27 | 2012-12-27 | Transformer bushing end screen grounding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220733392 CN203103056U (en) | 2012-12-27 | 2012-12-27 | Transformer bushing end screen grounding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203103056U true CN203103056U (en) | 2013-07-31 |
Family
ID=48854442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220733392 Expired - Fee Related CN203103056U (en) | 2012-12-27 | 2012-12-27 | Transformer bushing end screen grounding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203103056U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941048A (en) * | 2014-05-14 | 2014-07-23 | 国家电网公司 | Method for measuring voltage to earth of protective pressing plate and special grounded port |
| CN111525292A (en) * | 2020-05-20 | 2020-08-11 | 上海外高桥造船有限公司 | Ship grounding device and grounding system |
-
2012
- 2012-12-27 CN CN 201220733392 patent/CN203103056U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941048A (en) * | 2014-05-14 | 2014-07-23 | 国家电网公司 | Method for measuring voltage to earth of protective pressing plate and special grounded port |
| CN111525292A (en) * | 2020-05-20 | 2020-08-11 | 上海外高桥造船有限公司 | Ship grounding device and grounding system |
| CN111525292B (en) * | 2020-05-20 | 2021-07-16 | 上海外高桥造船有限公司 | Ship grounding device and grounding system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20141227 |
|
| EXPY | Termination of patent right or utility model |