CN201466610U - Wall bushing with double-shield structure - Google Patents
Wall bushing with double-shield structure Download PDFInfo
- Publication number
- CN201466610U CN201466610U CN2009200342323U CN200920034232U CN201466610U CN 201466610 U CN201466610 U CN 201466610U CN 2009200342323 U CN2009200342323 U CN 2009200342323U CN 200920034232 U CN200920034232 U CN 200920034232U CN 201466610 U CN201466610 U CN 201466610U
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- Prior art keywords
- shielding tube
- insulating sleeve
- shield structure
- low pressure
- wall bushing
- Prior art date
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- Expired - Lifetime
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Abstract
The utility model relates to the field of the manufacturing and the designing of air insulation metal closed switch equipment, and discloses a wall bushing with a double-shield structure, which comprises an insulating bushing, and is characterized in that a low-voltage shielding tube is embedded in the middle section of the insulating bushing and close to the outer wall thereof, and a high-voltage shielding tube is embedded close to the inner wall thereof; the insulating bushing, the low-voltage shielding tube and the high-voltage shielding tube are coaxial; an insulating board is arranged in the radial direction and close to the middle of the axial direction of the insulating bushing; the center of the insulating board is provided with a through hole which passes through a conductor; and the high-voltage shielding tube is provided with a high-voltage lead terminal connected with the conductor.
Description
Technical field
The utility model relates to manufacturing of air insulation metal enclosed switchgear and design field, relates in particular to a kind of wall bushing with double shield structure.
Background technology:
In high voltage switchgear, the reliability of insulation be the most general also be one of topmost performance requirement.The structural design of switch cubicle is the emphasis of air insulation metal enclosed switchgear always, and along with the progressively raising that the product miniaturization requires, the insulating part designing requirement is harsh more.The composite insulation structure that the wall bushing of present switchgear adopts air insulation and solid insulation to use simultaneously more, still, little, the relative insulating requirements of switchgear volume is higher, and this makes the reliability of the safe operation steady in a long-term of switchgear become problem.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of wall bushing with double shield structure, the local corona that produces owing to small air gap between conductor and the wall bushing be can solve, the insulation property of air insulation metal enclosed switchgear and the reliability of long-time running improved.
In order to solve the problems of the technologies described above, the utility model is achieved by the following technical solutions.
A kind of wall bushing with double shield structure comprises insulating sleeve, it is characterized in that, in the insulating sleeve stage casing, be embedded with the low pressure shielding cylinder near its outer wall, be embedded with the high-tension shielding tube, and insulating sleeve, low pressure shielding cylinder, high-tension shielding tube three are coaxial near its inwall; Axial intermediate radial near insulating sleeve is provided with insulation board, and the insulation board center is provided with the through hole that runs through conductor, and the high-tension shielding tube is provided with the high-voltage connection terminal of bonding conductor.
Further improvement of the utility model and characteristics are: the length of described low pressure shielding cylinder is less than the length of high-tension shielding tube; The end of described low pressure shielding cylinder and high-tension shielding tube is respectively arranged with the volume circle to the outer arcuate flange; Described insulating sleeve adopts the epoxide resin material cast to form.
The utility model is in the insulating sleeve stage casing, is embedded with the low pressure shielding cylinder near its outer wall, is embedded with the high-tension shielding tube near its inwall, and insulating sleeve, low pressure shielding cylinder, high-tension shielding tube three are coaxial; And the high-tension shielding tube is electrically connected the conductor that runs through insulating sleeve, uniform electric field distributes, prevented that traditional wall bushing from owing to small air gap between conductor and the wall bushing produces the possibility of local corona, having improved the insulation property of air insulation metal enclosed switchgear and the reliability of long-time running.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further details.
Fig. 1 looks schematic diagram for a kind of master of the wall bushing structure with double shield structure of 24KV air insulation metal enclosed switchgear;
Fig. 2 is the A-A cross-sectional schematic of Fig. 1;
Among the figure: 1 is insulating sleeve; 2 is the low pressure shading ring; 3 is the high-tension shielding ring; 4 is insulation board; 5 is the high-voltage connection terminal.
Embodiment
With reference to Fig. 1, Fig. 2, a kind of wall bushing with double shield structure of 24KV air insulation metal enclosed switchgear forms by poured with epoxy resin.The leading portion of insulating sleeve 1 and the outer wall of back segment are cast with insulated umbrella, to reach the purpose that increases insulation distance.In insulating sleeve 1 stage casing, be embedded with low pressure shielding cylinder 2 by cast near its outer wall, be embedded with high-tension shielding tube 3 near its inwall by cast, and insulating sleeve 1, low pressure shielding cylinder 2,3 threes are coaxial for the high-tension shielding tube; Axial intermediate radial near insulating sleeve 1 is cast with insulation board 4, and insulation board 4 centers offer the through hole that runs through conductor, are used to support charged conductor; High-tension shielding tube 3 is provided with the high-voltage connection terminal 5 of bonding conductor, and high-voltage connection terminal 5 parts are cast on the insulation board, and another is electrically connected exposed being used for.High-voltage connection terminal 5 is introduced high-tension shielding ring 3 with the high pressure of conductor, low pressure shading ring 2 is connected with the mounting panel of wall bushing and ground connection, has only epoxy resin as medium between high-tension shielding ring 3 and the low pressure shading ring 2, the compressive resistance of epoxy resin is far longer than the breakdown strength of epoxy along the air of face, by widening the end distance of high-tension shielding ring 3 and low pressure shading ring 2, adopt the volume circle to handle in the end of high-tension shielding ring 3 and low pressure shading ring 2 simultaneously, optimized in the epoxy widely and airborne field intensity, improved insulation property.Usually maximum field strength occurs in the end on high pressure and ground, so the end shape on high pressure and ground can greatly have influence on the size that produces field intensity.By widening the end distance of high-tension shielding ring 3 and low pressure shading ring 2, adopt the volume circle to handle in the end of high-tension shielding ring 3 and low pressure shading ring 2 simultaneously, optimized in the epoxy widely and airborne field intensity, improved insulation property.
Claims (4)
1. the wall bushing with double shield structure comprises insulating sleeve, it is characterized in that, in the insulating sleeve stage casing, be embedded with the low pressure shielding cylinder near its outer wall, be embedded with the high-tension shielding tube, and insulating sleeve, low pressure shielding cylinder, high-tension shielding tube three are coaxial near its inwall; Axial intermediate radial near insulating sleeve is provided with insulation board, and the insulation board center is provided with the through hole that runs through conductor, and the high-tension shielding tube is provided with the high-voltage connection terminal of bonding conductor.
2. a kind of wall bushing with double shield structure according to claim 1 is characterized in that the length of described low pressure shielding cylinder is less than the length of high-tension shielding tube.
3. a kind of wall bushing with double shield structure according to claim 1 is characterized in that, the end of described low pressure shielding cylinder and high-tension shielding tube is respectively arranged with the volume circle to the outer arcuate flange.
4. a kind of wall bushing with double shield structure according to claim 1 is characterized in that, described insulating sleeve adopts the epoxide resin material cast to form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200342323U CN201466610U (en) | 2009-08-14 | 2009-08-14 | Wall bushing with double-shield structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200342323U CN201466610U (en) | 2009-08-14 | 2009-08-14 | Wall bushing with double-shield structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201466610U true CN201466610U (en) | 2010-05-12 |
Family
ID=42393957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200342323U Expired - Lifetime CN201466610U (en) | 2009-08-14 | 2009-08-14 | Wall bushing with double-shield structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201466610U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101969186A (en) * | 2010-10-14 | 2011-02-09 | 句容市华通电器有限公司 | High-tension wall entrance bushing |
| CN102801123A (en) * | 2012-07-10 | 2012-11-28 | 江苏电科电气设备有限公司 | 20KV sleeve |
| WO2013086774A1 (en) * | 2011-12-15 | 2013-06-20 | 平高集团有限公司 | Ultra-high voltage direct current wall bushing and shielding structure thereof |
| CN103296620A (en) * | 2012-03-01 | 2013-09-11 | 上海旭然电器有限公司 | Wall feed-through sleeve with high-low voltage shielding |
| CN103311856A (en) * | 2012-03-08 | 2013-09-18 | 西门子公司 | High-voltage bushing for dc voltage |
| CN105469911A (en) * | 2016-01-04 | 2016-04-06 | 上海雷博司电气股份有限公司 | Insulating part |
| CN114512947A (en) * | 2021-12-02 | 2022-05-17 | 国网宁夏电力有限公司电力科学研究院 | Method for improving breakdown resistance of wall bushing and wall bushing |
-
2009
- 2009-08-14 CN CN2009200342323U patent/CN201466610U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101969186A (en) * | 2010-10-14 | 2011-02-09 | 句容市华通电器有限公司 | High-tension wall entrance bushing |
| WO2013086774A1 (en) * | 2011-12-15 | 2013-06-20 | 平高集团有限公司 | Ultra-high voltage direct current wall bushing and shielding structure thereof |
| CN103296620A (en) * | 2012-03-01 | 2013-09-11 | 上海旭然电器有限公司 | Wall feed-through sleeve with high-low voltage shielding |
| CN103311856A (en) * | 2012-03-08 | 2013-09-18 | 西门子公司 | High-voltage bushing for dc voltage |
| CN102801123A (en) * | 2012-07-10 | 2012-11-28 | 江苏电科电气设备有限公司 | 20KV sleeve |
| CN102801123B (en) * | 2012-07-10 | 2015-04-29 | 江苏电科电气设备有限公司 | 20KV sleeve |
| CN105469911A (en) * | 2016-01-04 | 2016-04-06 | 上海雷博司电气股份有限公司 | Insulating part |
| CN114512947A (en) * | 2021-12-02 | 2022-05-17 | 国网宁夏电力有限公司电力科学研究院 | Method for improving breakdown resistance of wall bushing and wall bushing |
| CN114512947B (en) * | 2021-12-02 | 2024-01-12 | 国网宁夏电力有限公司电力科学研究院 | Method for improving breakdown resistance of wall bushing and wall bushing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Xi'an Xikai Medium-Low Pressure Switch Co., Ltd. Assignor: China XD Electronic Corporation Contract record no.: 2012610000086 Denomination of utility model: Wall bushing with double-shield structure Granted publication date: 20100512 License type: Exclusive License Record date: 20120531 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20100512 |
|
| CX01 | Expiry of patent term |