CN101169198A - Electrical bushing - Google Patents
Electrical bushing Download PDFInfo
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- CN101169198A CN101169198A CNA2007101568110A CN200710156811A CN101169198A CN 101169198 A CN101169198 A CN 101169198A CN A2007101568110 A CNA2007101568110 A CN A2007101568110A CN 200710156811 A CN200710156811 A CN 200710156811A CN 101169198 A CN101169198 A CN 101169198A
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- ring
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- electrical bushing
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Abstract
A power casing comprises a body (1) made of a thick layer (4) with epoxy resin mixed material. The internal wall of the body is provided with a bus voltage-equalizing ring (2), and two ends are respectively provided with a copper spiral ring (21); the bus voltage-equalizing ring and the copper spiral rings are cast in the thick layer of epoxy resin mixed material of the casing; a shielding ring (3) is arranged between the voltage-equalizing ring and the grounding; two ends of the shielding ring are respectively provided with an arc (3) the internal and the external surfaces of which are encased with semiconductor material layers; the voltage-equalizing ring is provided with a spring leap (6) which contacts with the bus. The invention has the advantage that the voltage-equalizing ring and an earth shielding ring are additionally arranged in epoxy resin of a bus casing with a nominal voltage of 35kV to eliminate partial discharge and equalize the electric field; secondly, the end parts of the voltage-equalizing ring are additionally provided with the copper spiral rings to equalize the electric field to achieve better and closer combination with the epoxy resin thick layer and eliminate the air space. The invention has rational structure and can considerably reduce the partial discharge quantity and the phenomenon of casing discharge arc in operation and improve the operational safety and reliability; in addition, the invention has a long service life.
Description
Technical field
The present invention relates to a kind of sleeve pipe field, particularly relating to a kind of ac power frequency that is applicable to is that 50 He Zhi, voltage rating are the electrical bushing in 35 kilovolts the electric power system.
Background technique
At present, ac power frequency is that 50 He Zhi, voltage rating are that the domestic insulating power sleeve pipe that adopts is to adopt epoxy resin compression moulding in 35 kilovolts the electric power system, its structural design and common pipe fitting are similar, and, there are some unreasonable parts for the bus molded cannula of electric power system high voltage appearance.And for example China Patent No. is a disclosed scheme in 02130610.9 " a kind of chlorinated polynvinyl chloride (CPVC) high-voltage electric power casing and pipe fitting ", the composition of this invention electrical bushing is the chlorinated polyvinyl chloride resin powder: 100, nano polyvinyl chloride resin: 8-15, heat stabilizer: 3-4, oiling agent: 2-3, anti-impact modifier: 8-10, modifier: 2-4, fire retardant: 3-4, nano-calcium carbonate: 3; Wherein the Main Ingredients and Appearance consumption of pipe fitting is (weight portion): the chlorinated polyvinyl chloride resin powder: 100, and nano polyvinyl chloride resin: 8-15, heat stabilizer: 4-5, oiling agent: 0.5-2, anti-impact modifier: 2-3, modifier: 1-3, fire retardant: 2-4, nano-calcium carbonate: 1-2.Adopt foregoing invention to overcome the easy resolution problem of chlorinated polynvinyl chloride (CPVC) hot working, corrosion-resistant, heat-resisting and good mechanical property, higher impact strength and higher ring stiffness are arranged, the tensile yield strength of tubing has improved 76.9%, and pipe material inner wall is smooth, and the power when wearing cable has reduced by 80%; It goes for post and telecommunications, high-tension electricity, cable sleeve.
Yet, its deficiency is that the structural design of this chlorinated polynvinyl chloride (CPVC) high-voltage electric power casing exists to fail to take into full account equally and eliminates bubble-discharge and make the uniform unreasonable part of electric field, partial discharge quantity is bigger in operation is used, cover tube discharge arcing phenomenon is serious, thereby the potential safety hazard of existing, even have this sleeve pipe of generation to burn breakdown accident, influence the normal operation of electric power system.
Summary of the invention
Technical problem to be solved by this invention is exactly to provide a kind of piezometer ring and shielding ring of having additional in voltage rating is 35 kilovolts the epoxy resin thick-layer of bus molded cannula to eliminate bubble-discharge and to make the uniform electrical bushing of electric field at the present situation of above-mentioned prior art.
The present invention solves the problems of the technologies described above the technological scheme that is adopted to be: this sleeve pipe comprises that one has the body of insulation material thick-layer, is penetrated with bus in this body, and this body periphery is provided with earthing member; The inwall of described body is provided with the bus uniform voltage ring, described insulation material thick-layer; Be set to the mixture of epoxy resins thick-layer; This piezometer ring is cast in the mixture of epoxy resins thick-layer of described sleeve pipe; The function of this piezometer ring is in order to inside of eliminating described sleeve pipe and the bubble-discharge between the bus, and prevents gap breakdown.
Can be provided with shielding ring between described piezometer ring and the ground connection, this shielding ring can be arranged in the mixture of epoxy resins thick-layer of described body, and this shielding ring is used to eliminate bubble-discharge and makes electric field even.
Described piezometer ring and shielding ring all can be cast in the thick-layer of mixture of epoxy resins of described body with pouring procedure.
Described piezometer ring two end part can respectively be provided with the copper whorl, and this copper whorl can be cast in the thick-layer of mixture of epoxy resins of described sleeve pipe.The function of this copper whorl is that electric field evenly can be combined closely with described mixture of epoxy resins thick-layer again.
Described piezometer ring is provided with spring sheet; Be used for the bus of electrical bushing of the present invention and contacting of this piezometer ring.
Described shielding ring can be embedded in described body middle part, and preferred scheme is to be embedded in the mixture of epoxy resins thick-layer along this sleeve pipe lengthwise position.
Each can be provided with circular arc described shielding ring two ends.The shielding ring of setting up this band circular arc between described piezometer ring and the ground connection is in order to make electric field even, to eliminate partial discharge.
The inside and outside surface of described shielding ring can be surrounded with semiconductor material layer.This semiconductor material layer plays between described shielding ring and the mixture of epoxy resins thick-layer and can combine closely.
Described earthing member is the four grounded screw that can be set to described body middle part, and this earthing screw is used for electrical bushing ground connection of the present invention.
Compared with prior art, the structure two big features of electrical bushing of the present invention are to set up a piezometer ring and a ground screen shielding ring in voltage rating is 35 kilovolts the epoxy resin thick-layer of bus type body, are used to eliminate bubble-discharge and make electric field even; Next is to have set up the copper whorl in this piezometer ring end to come uniform electric field, reach again and described epoxy resin thick-layer between combine closely better, to eliminate air gap.Thereby, the invention has the advantages that rational in infrastructure, can reduce greatly operation use in partial discharge quantity and cover tube discharge arcing phenomenon, thereby improve safety in operation and operational safety, and have good working life.
Description of drawings
Fig. 1 is a side direction view of the present invention;
Fig. 2 is the A-A sectional view of Fig. 1;
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Fig. 1, Fig. 2 show a mode of execution of a kind of electrical bushing of the present invention.It comprises that one has the body 1 of mixture of epoxy resins thick-layer 4, is penetrated with bus in this body, and this body 1 is provided with earthing member 5 and spring sheet 6; The inwall of this body 1 is provided with bus uniform voltage ring 2, and this piezometer ring 2 is to be cast in the mixture of epoxy resins thick-layer 4 of described body 1.Piezometer ring 2 is provided with spring sheet 6, and piezometer ring 2 contacts with bus by spring sheet 6, is for the inside of eliminating sleeve pipe 1 and the bubble-discharge between the bus, prevents gap breakdown.
In the thick-layer 4 of the mixture of epoxy resins of body 1, vertically set ground screen shielding ring 3 along sleeve pipe.This ground screen shielding ring 3 is arranged between piezometer ring 2 and the ground connection; These screen shielding ring 3 two ends, ground respectively have circular arc 31.The setting that has the ground screen shielding ring 3 of circular arc 31 is to impel electric field even, eliminates partial discharge.
Above-mentioned piezometer ring 2 all is cast in the mixture of epoxy resins thick-layer 4 of body 1 with shielding ring 3.
Be provided with copper whorl 21 at the two end part of piezometer ring 2, the function of copper whorl 21 is that electric field evenly can be combined closely again and between the mixture of epoxy resins thick-layer 4.
In order to combine closely in shielding ring 3 and the mixture of epoxy resins thick-layer 4, held semiconductor material layer on the inside and outside surface of shielding ring 3.
Piezometer ring 2 is provided with spring sheet 6, is to be used for the bus of electrical bushing of the present invention and contacting of piezometer ring 2.
Be provided with four grounded screw 5 at the middle part of sleeve pipe 1, be used for electrical bushing ground connection of the present invention.
Withstand voltage and the local discharge performance of electrical bushing of the present invention all meets the regulation of 35KV epoxy casting current transformer in China's standard GB 1208.
Claims (9)
1. electrical bushing, it comprises that one has the body (1) of insulation material thick-layer (4), be placed with bus in this body, this body (1) periphery is provided with earthing member (5), it is characterized in that: the inwall of described body (1) is provided with bus uniform voltage ring (2), and this piezometer ring (2) is cast in the mixture of epoxy resins thick-layer (4) of described body.
2. electrical bushing according to claim 1 is characterized in that: be provided with shielding ring (3) between described piezometer ring (2) and the described earthing member (5), this shielding ring (3) is arranged in the insulation material thick-layer thick-layer (4) of described body (1).
3. electrical bushing according to claim 1 is characterized in that: described piezometer ring (2) two end part respectively are provided with copper whorl (21), and this copper whorl (21) is cast in the insulation material thick-layer (4) of described body.
4. electrical bushing according to claim 2 is characterized in that: described shielding ring (3) is embedded in described body middle part and arranges along this sleeve pipe lengthwise position.
5. electrical bushing according to claim 2 is characterized in that: described shielding ring (3) two ends respectively are provided with circular arc (31).
6. electrical bushing according to claim 2 is characterized in that: the inside and outside surface of described shielding ring (3) is surrounded with semiconductor material layer.
7. electrical bushing according to claim 1 is characterized in that: described earthing member (5) is arranged on the four grounded screw of the male part at described body (1) middle part.
8. electrical bushing according to claim 1 is characterized in that: described insulation material thick-layer (4) is set to the mixture of epoxy resins thick-layer.
9. electrical bushing according to claim 3 is characterized in that: described piezometer ring (2) is provided with spring sheet (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101568110A CN100532902C (en) | 2007-11-09 | 2007-11-09 | Electrical bushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101568110A CN100532902C (en) | 2007-11-09 | 2007-11-09 | Electrical bushing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101169198A true CN101169198A (en) | 2008-04-30 |
| CN100532902C CN100532902C (en) | 2009-08-26 |
Family
ID=39389905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101568110A Expired - Fee Related CN100532902C (en) | 2007-11-09 | 2007-11-09 | Electrical bushing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100532902C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111236926A (en) * | 2018-11-29 | 2020-06-05 | 斯伦贝谢技术有限公司 | High voltage protection and shielding in downhole tools |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3909759A (en) * | 1974-04-08 | 1975-09-30 | Gen Electric | Bushing well for instrument transformer and transformers including such well |
-
2007
- 2007-11-09 CN CNB2007101568110A patent/CN100532902C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111236926A (en) * | 2018-11-29 | 2020-06-05 | 斯伦贝谢技术有限公司 | High voltage protection and shielding in downhole tools |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100532902C (en) | 2009-08-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20080404 Address after: Ningbo Jiangbei three Zhejiang Ningbo mutual inductor Co., Ltd. Applicant after: Ningbo three love mutual inductor Co., Ltd. Co-applicant after: Shaoxing Power Bureau Address before: Ningbo Jiangbei three Zhejiang Ningbo mutual inductor Co., Ltd. Applicant before: Ningbo San'ai Transformer Co., Ltd. |
|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20090826 Termination date: 20141109 |
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| EXPY | Termination of patent right or utility model |