CN201393028Y - Shielding high pressure through-wall sleeve - Google Patents
Shielding high pressure through-wall sleeve Download PDFInfo
- Publication number
- CN201393028Y CN201393028Y CN200920116592U CN200920116592U CN201393028Y CN 201393028 Y CN201393028 Y CN 201393028Y CN 200920116592 U CN200920116592 U CN 200920116592U CN 200920116592 U CN200920116592 U CN 200920116592U CN 201393028 Y CN201393028 Y CN 201393028Y
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- CN
- China
- Prior art keywords
- sleeve body
- shielding
- electric field
- field strength
- high pressure
- 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
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Abstract
The utility model relates to a shielding high pressure through-wall sleeve, which comprises a sleeve body and an insert for installing nuts, a bus inlet and outlet hole is arranged in the sleeve body, an inner shielding net ring used for connecting with a bus is arranged in the sleeve body, and an outer shielding net ring used for connecting with the insert for installing nuts is further arranged in the sleeve body. The shielding high pressure through-wall sleeve has the beneficial effects that through combining a high potential and a low potential shielding systems, the position field strength of a flange surface with the highest electric field strength is forcedly pulled forward, which reduces the component of a power line in the vertical direction, thereby the electric field strength of the position is reduced through the method, the aim of evening the electric field is realized, the corona is avoided, the corona starting voltage is improved, the local the discharge quantity is reduced, the service life of insulators is prolonged, and the safety operation of electric systems is guaranteed.
Description
Technical field
The utility model relates to a kind of sleeve pipe, especially a kind of shielding high-voltage wall bushing.
Background technology
With respect to the 12kV switch cubicle, the 24kV switch cubicle has that the electric energy of sending power is strong, and transmission distance is long, and line loss is low, advantages such as big capacity.Based on above reason, national grid just actively pushes away the 24kV switch cubicle.But along with the rising of electric pressure, its internal electric field distributes complicated more.Sleeve pipe is fixed on the metal decking of switch cubicle by the installation nut on the flange face, and the high pressure conductive bus bar passes collar aperture, and flange face position electric field strength height discharges to metal decking easily.Conductive bus bar adopts rectangular shape simultaneously, and the edge radius of curvature is little, causes Electric Field Distribution extremely inhomogeneous.In severe non-uniform electric field, maximum field strength and average field-strength differ greatly, so that when applied voltage and average field-strength thereof were also lower, the local field strength in electrode curvature radius smaller part annex space was very big.In this local field strength district, produce strong free, but since ionization electrode slightly at a distance field intensity greatly reduces, so that this free district can not expand to is very big, can only be confined near the field strength range of this electrode.Be accompanied by the compound and anti-excitation that dissociates and exist, send a large amount of light radiation, form corona.Insulating part adds environment for use factor affecting such as (temperature, humidity, dust, gaseous acid alkalescence) under effects such as long-time discharge, heat, chemistry, accelerate the aging of insulating part, progressively loses insulation property.Final even may cause insulation breakdown, blast, cause large-area power failure, loss of life or personal injury and property loss.
Summary of the invention
The utility model will solve the shortcoming of above-mentioned prior art, and a kind of uniform electric field intensity is provided, the shielding high-voltage wall bushing that fail safe is good.
The utility model solves the technical scheme that its technical problem adopts: this shielding high-voltage wall bushing, comprise sleeve body and the nut inserts is installed, be provided with the busbar manhole appendix in the sleeve body, sleeve body inside is provided with and is used for the inner shield net circle that is connected with busbar, and sleeve body inside is provided with in addition and is used for and the external shield net circle that the nut inserts is connected is installed.
Described sleeve body is made by epoxy resin.
The effect that the utility model is useful is: by the combination of high potential and two shielding harness of earth potential, the flange face position field intensity that electric field strength is the highest forces to push away forward, reduce power line vertical direction component, reduce the electric field strength of this position by the method, reach the purpose of uniform electric field, avoid corona, improve discharge inception voltage, reduce partial discharge quantity, reach and improve insulating part useful life, guarantee the safe operation of electric power system.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Description of reference numerals: sleeve body 1, busbar manhole appendix 2, inner shield net circle 3, external shield net circle 4 is installed nut inserts 5, flange face 6.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
With reference to accompanying drawing: the utility model is outward the sleeve body 1 that epoxide resin material is shaped and forms through pressure gel, sleeve body 1 inside is provided with busbar manhole appendix 2, rely on sleeve body 1 to reach high pressure busbar safety, simultaneously busbar is played the role of positioning by metal decking.Nut inserts 5 is installed to be fixed on sleeve pipe on the switch cubicle metal decking.Inner shield net circle 3 links to each other with the electrification in high voltage busbar by lead and forms the high potential shielding, increases the radius of curvature of conductor with this; External shield net circle 4 is connected and ground connection with installation nut inserts 5 by lead, forms earth potential shielding system.By the combination of high potential and two shielding harness of earth potential, the flange face 6 position field intensity that electric field strength is the highest force to push away forward, reduce power line vertical direction component, reach the purpose of uniform electric field.
In addition to the implementation, the utility model can also have other execution modes.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection range of the utility model requirement.
Claims (2)
1, a kind of shielding high-voltage wall bushing, comprise sleeve body (1) and nut inserts (5) is installed, be provided with busbar manhole appendix (2) in the sleeve body (1), it is characterized in that: sleeve body (1) inside is provided with and is used for the inner shield net circle (3) that is connected with busbar, and sleeve body (1) inside is provided with in addition and is used for and the external shield net circle (4) that nut inserts (5) is connected is installed.
2, shielding high-voltage wall bushing according to claim 1 is characterized in that: described sleeve body (1) is made by epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920116592U CN201393028Y (en) | 2009-03-30 | 2009-03-30 | Shielding high pressure through-wall sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920116592U CN201393028Y (en) | 2009-03-30 | 2009-03-30 | Shielding high pressure through-wall sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201393028Y true CN201393028Y (en) | 2010-01-27 |
Family
ID=41599849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920116592U Expired - Fee Related CN201393028Y (en) | 2009-03-30 | 2009-03-30 | Shielding high pressure through-wall sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201393028Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601111A (en) * | 2019-11-01 | 2019-12-20 | 云南电网有限责任公司电力科学研究院 | Take wall bushing of magnetic shield |
-
2009
- 2009-03-30 CN CN200920116592U patent/CN201393028Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601111A (en) * | 2019-11-01 | 2019-12-20 | 云南电网有限责任公司电力科学研究院 | Take wall bushing of magnetic shield |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100127 Termination date: 20120330 |