CN108962515B - High-voltage bushing and cable terminal with uniform electric field function - Google Patents
High-voltage bushing and cable terminal with uniform electric field function Download PDFInfo
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- CN108962515B CN108962515B CN201810646090.XA CN201810646090A CN108962515B CN 108962515 B CN108962515 B CN 108962515B CN 201810646090 A CN201810646090 A CN 201810646090A CN 108962515 B CN108962515 B CN 108962515B
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- voltage bushing
- straight line
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/56—Insulating bodies
- H01B17/58—Tubes, sleeves, beads, or bobbins through which the conductor passes
- H01B17/583—Grommets; Bushings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/56—Insulating bodies
- H01B17/64—Insulating bodies with conductive admixtures, inserts or layers
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Abstract
The invention discloses a high-voltage bushing with a uniform electric field function, which is provided with a pipe hole extending from bottom to top, wherein the outer side edge of a longitudinal section of the high-voltage bushing comprises a first curve, a second curve and a third curve or straight line which are sequentially and smoothly connected. The high-voltage bushing is formed by surrounding a plane defined by the inner wall of a pipe hole and the outer edge of the high-voltage bushing by taking the pipe hole as a central axis, and the high-voltage bushing is made of a material serving as a solid insulating medium, and a conductive or semi-conductive layer is arranged on the outer surface of the high-voltage bushing. The first curve and the conductive or semi-conductive layer play a role in homogenizing the electric field in the solid insulating medium, the third curve or straight line can effectively reduce the voltage gradient on the surface of the solid insulating medium, and the convex structure of the second curve can furthest reduce the electric field of the conductive or semi-conductive layer at the tail end of the first curve.
Description
Technical Field
The invention belongs to the technical field of electric power, and relates to a sleeve for an electric power outdoor terminal and a cable terminal.
Background
At present, in high voltage bushings and electric products with similar structures which adopt solid insulating media, shielding nets made of conducting or semi-conducting materials are generally adopted to shield and homogenize the electric fields inside and on the surface of the products. In order to form good electric field distribution in and on the surface of the solid insulating medium, a shielding net is molded in the solid insulating medium to improve the reliability of the product under high voltage conditions.
However, the mesh of the shielding net needs to be formed by punching, burrs are easily generated at the edges of the mesh in the punching process, and the existence of the burrs can generate partial discharge to cause potential safety hazards.
Disclosure of Invention
The invention mainly aims to overcome the defects of the prior art and provide a high-voltage bushing with a uniform electric field function, which is simple in process, safe and reliable.
To achieve the above object, the present invention provides a high voltage bushing having a uniform electric field function, having a pipe hole extending from bottom to top, the outer edge of the longitudinal section of the high voltage bushing comprises a first curve, a second curve and a third curve or straight line which are smoothly connected in sequence, the outer edge of the longitudinal section of the high-voltage bushing extends outwards gradually from bottom to top to form a smooth and continuous first curve, the tail end of the first curve extends downwards, bends outwards and extends upwards to form a smooth and continuous second curve which is convex downwards, the tail end of the second curve extends inwards gradually along the upward direction to form a smooth and continuous third curve or straight line, the high-voltage bushing is formed by surrounding a plane defined by the inner wall of a pipe hole and the outer edge of the high-voltage bushing by taking the pipe hole as a central axis, and the high-voltage bushing is made of a material serving as a solid insulating medium, and a conductive or semi-conductive layer is arranged on the outer surface of the high-voltage bushing.
Preferably, the first curve is circular-arc shaped.
Preferably, a first straight line is connected to a lower end of the first curve, and the first straight line and the first curve, the second curve, the third curve or the straight line together form an outer edge of the high voltage bushing.
Preferably, a connecting straight line is further connected between the second curve and the third curve or straight line, the lower end of the connecting straight line is in smooth transition connection with the tail end of the second curve, the upper end of the connecting straight line is in smooth transition connection with the lower end of the third curve or straight line, and the connecting straight line and the first curve, the second curve, the third curve or straight line together form the outer edge of the high-voltage bushing.
Preferably, the lower portion of the high voltage bushing is provided with an insert mounting hole, and an insert made of a metal or non-metal material is mounted in the insert mounting hole.
When the invention is applied to a cable terminal, the cable terminal is provided with the conductive rod and the sleeve, wherein the sleeve is the high-voltage sleeve, and the conductive rod is arranged in the tube hole of the high-voltage sleeve.
As mentioned above, the outer edge of the longitudinal section of the high voltage bushing with uniform electric field function of the present invention comprises the first curve, the second curve and the third curve or the straight line which are smoothly connected in turn, the outer surface of the high voltage bushing is provided with the conductive or semi-conductive layer, the first curve and the conductive or semi-conductive layer can play the role of uniform electric field inside the solid insulating medium, the third curve or the straight line can effectively reduce the voltage gradient on the surface of the solid insulating medium and the role of reducing the electric field on the surface of the solid insulating medium, the downward convex structure of the second curve can maximally reduce the electric field of the conductive or semi-conductive layer at the end of the first curve, the high voltage bushing of the present invention can be produced by integral molding, the conductive or semi-conductive layer on the outer surface of the high-voltage bushing is coated or sprayed, so that the process is simple, impurities are not easy to enter the high-voltage bushing, the quality is high, and the effect is good.
Drawings
Fig. 1 is a schematic longitudinal sectional structure diagram of a high voltage bushing embodiment 1 with uniform electric field function according to the present invention;
figure 2 is an enlarged schematic view of the high voltage bushing of figure 1 at I;
figure 3 is a schematic longitudinal sectional view of the high voltage bushing of figure 1 applied to a cable termination;
fig. 4 is a schematic longitudinal cross-sectional structure diagram of an embodiment 2 of the high voltage bushing with uniform electric field function according to the present invention;
fig. 5 is a schematic longitudinal sectional view of a high voltage bushing embodiment 3 with uniform electric field function according to the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.
Example 1
Referring to fig. 1 and 2, an embodiment 1 of a high voltage bushing 10 with uniform electric field function according to the present invention is disclosed. The high voltage bushing 10 has a pipe hole 11 extending from bottom to top, and the outer side edges of the longitudinal section of the high voltage bushing 10 include a first curve S1, a second curve S2 and a third straight line S3 which are smoothly connected in sequence.
The outer edge of the high voltage bushing 10 gradually extends outward from bottom to top to form a first curve S1. The end of the first curve S1 extends downward, curves outward, and extends upward to form a smooth continuous second curve S2 which is convex downward. The end of the second curve S2 gradually extends inward in an upward direction to form a smooth continuous third straight line S3.
The high-voltage bushing 10 is formed by surrounding a plane defined by the inner wall of the pipe hole 11 and the outer edge of the high-voltage bushing with the pipe hole 11 as a central axis and is made of a material serving as a solid insulating medium. The high voltage bushing 10 has a conductive or semiconductive layer (not shown) on its outer surface.
In the present embodiment, the first curve S1 has an arc shape. The lower end of the first curve S1 may further be connected to a first straight line S11, and the first straight line S11, the first curve S1, the second curve S2, and the third straight line S3 together form the outer edge of the high voltage bushing 10.
As a further improvement of this embodiment, the lower portion of the high voltage bushing 10 is provided with an insert mounting hole (not shown), and an insert made of a metal or non-metal material is mounted in the insert mounting hole.
Referring to fig. 3, when the high voltage bushing with uniform electric field function of the present invention is applied to a cable terminal having a conductive rod and the above-mentioned high voltage bushing, the conductive rod 30 is installed in the tube hole 11 of the high voltage bushing 10.
Example 2
Referring to fig. 4, an embodiment 2 of a high voltage bushing 10' with uniform electric field function according to the present invention is disclosed, which is similar to embodiment 1 except that: the third straight line in embodiment 1 is replaced with a third curve S3' in the present embodiment.
A connecting straight line S31 may be connected between the second curve S2 and the third curve S3 ', a lower end of the connecting straight line S31 is connected to a distal end of the second curve S2 in a smooth transition manner, an upper end of the connecting straight line S31 is connected to a lower end of the third curve S3' in a smooth transition manner, and the connecting straight line S31, the first curve S1, the second curve S2 and the third curve S3 'together form an outer edge of the high voltage bushing 10'.
Example 3
Referring to fig. 5, an embodiment 3 of a high voltage bushing 10' with uniform electric field function according to the present invention is disclosed, which is similar to embodiment 2 except that: a third curve S3' is formed with a umbrella or rib S32.
The above embodiments only list some cases of the first curve, the second curve and the third curve or straight line, but since the structural cases of all the curves cannot be listed one by one, all the continuous curves combined by other different straight lines and/or curve segments with similar effects also belong to the range of the first curve, all the continuous curves combined by other different straight lines and/or curve segments with similar effects also belong to the range of the second curve, all the continuous curves or straight lines with approximately a certain inclination angle also belong to the range of the third curve or straight line, and similar geometric shapes evolved from the structures are all regarded as the protection scope of the present invention.
In summary, the first curve S1, the second curve S2 and the third curve or straight line S3/S3'/S3 ″ of the high voltage bushing 10 with the function of uniform electric field are smoothly connected in sequence and form the outer edge of the high voltage bushing, the outer surface of the high voltage bushing 10 is provided with the conductive or semiconductive layer 12, the first curve S1 and the conductive or semiconductive layer 12 function to uniform the electric field inside the solid insulating medium, the third curve or straight line S3 can effectively reduce the voltage gradient on the surface of the solid insulating medium and function to reduce the electric field on the surface of the solid insulating medium, the downward convex structure of the second curve S2 can reduce the electric field of the conductive or semiconductive layer at the end of the first curve to the maximum extent, the high voltage bushing of the present invention can be produced by integral injection molding, the conductive or semiconductive layer on the outer surface thereof is performed by coating or spraying, the process is simple, impurities are not easy to enter the high-voltage bushing, the quality is high, and the effect is good.
The foregoing is a more detailed description of the invention in connection with specific/preferred embodiments and is not intended to limit the practice of the invention to those descriptions. It will be apparent to those skilled in the art that various substitutions and modifications can be made to the described embodiments without departing from the spirit of the invention, and these substitutions and modifications should be considered to fall within the scope of the invention.
Claims (6)
1. The utility model provides a high-voltage bushing with even electric field function, has the tube hole that up extends from down which characterized in that: the outer side edge of the longitudinal section of the high-voltage bushing comprises a first curve, a second curve and a third curve or straight line which are sequentially and smoothly connected, the outer side edge of the longitudinal section of the high-voltage bushing gradually extends outwards from bottom to top to form a smooth and continuous first curve, the tail end of the first curve extends downwards, bends outwards and extends upwards to form a smooth and continuous second curve which is convex downwards, the tail end of the second curve gradually extends inwards along the upward direction to form a smooth and continuous third curve or straight line, the high-voltage bushing is a bushing which is formed by encircling a plane formed by the inner wall of a pipe hole and the outer side edge of the high-voltage bushing by taking the pipe hole as a central axis, and is made of a material serving as a solid insulating medium, and a conductive or semi-conductive layer is arranged on the outer side surface of the high-voltage bushing.
2. A high voltage bushing having a uniform electric field function as claimed in claim 1, wherein: the first curve is arc-shaped.
3. A high voltage bushing having a uniform electric field function as claimed in claim 2, wherein: the lower end of the first curve is connected with a first straight line, and the first straight line, the first curve, the second curve, the third curve or the straight line form the outer edge of the high-voltage bushing together.
4. A high voltage bushing having a uniform electric field function as claimed in claim 1, wherein: and a connecting straight line is also connected between the second curve and the third curve or straight line, the lower end of the connecting straight line is in smooth transition connection with the tail end of the second curve, the upper end of the connecting straight line is in smooth transition connection with the lower end of the third curve or straight line, and the connecting straight line and the first curve, the second curve, the third curve or straight line together form the side edge of the high-voltage bushing.
5. A high voltage bushing having a uniform electric field function as claimed in claim 1, wherein: the lower part of the high-voltage bushing is provided with an insert mounting hole, and an insert made of metal or nonmetal materials is mounted in the insert mounting hole.
6. A cable termination having a conducting rod and a bushing, wherein the bushing is a high voltage bushing as claimed in any of claims 1 to 5, and wherein the conducting rod is mounted in a bore of the high voltage bushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810646090.XA CN108962515B (en) | 2018-06-21 | 2018-06-21 | High-voltage bushing and cable terminal with uniform electric field function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810646090.XA CN108962515B (en) | 2018-06-21 | 2018-06-21 | High-voltage bushing and cable terminal with uniform electric field function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108962515A CN108962515A (en) | 2018-12-07 |
| CN108962515B true CN108962515B (en) | 2022-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810646090.XA Active CN108962515B (en) | 2018-06-21 | 2018-06-21 | High-voltage bushing and cable terminal with uniform electric field function |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE476775T1 (en) * | 2006-06-21 | 2010-08-15 | Abb Technology Ltd | ELECTRICAL FIELD CONTROL DEVICE |
| FR2903243B1 (en) * | 2006-06-29 | 2008-10-03 | Nexans Sa | ELECTRICAL CROSS STRUCTURE FOR SUPERCONDUCTING ELEMENT |
| CN104779021B (en) * | 2015-05-06 | 2016-09-07 | 河南森源电气股份有限公司 | A kind of gas-filling cabinet insulating sleeve |
| CN206022000U (en) * | 2016-05-19 | 2017-03-15 | 中科电力装备（安徽）智能化科技有限公司 | A kind of reinforced primary cut-out insulator structure |
| DE102016112096A1 (en) * | 2016-07-01 | 2018-01-04 | Schneider Electric Industries Sas | EXECUTION |
| CN208385099U (en) * | 2018-06-21 | 2019-01-15 | 深圳市沃尔核材股份有限公司 | A kind of bushing and cable termination with uniform electric field function |
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| CN108962515A (en) | 2018-12-07 |
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Effective date of registration: 20210628 Address after: 518118 Wool Industrial Park, Lanjing North Road, Longtian Street, Pingshan District, Shenzhen City, Guangdong Province Applicant after: Shenzhen Woer Heat-shrinkable Material Co.,Ltd. Applicant after: SHENZHEN WOER NEW ENERGY ELECTRICAL TECHNOLOGY Co.,Ltd. Applicant after: CHANGZHOU WOER HEAT-SHRINKABLE MATERIAL Co.,Ltd. Address before: 518118 Vol Industrial Park, Lanjingbei Road, Pingshan District, Shenzhen City, Guangdong Province Applicant before: Shenzhen Woer Heat-shrinkable Material Co.,Ltd. Applicant before: SHENZHEN WOER NEW ENERGY ELECTRICAL TECHNOLOGY Co.,Ltd. Applicant before: SHENZHEN WOER SPECIAL CABLE Co.,Ltd. Applicant before: CHANGZHOU WOER HEAT-SHRINKABLE MATERIAL Co.,Ltd. Applicant before: LTK ELECTRIC WIRE (HUIZHOU) Ltd. Applicant before: HUIZHOU LTK ELECTRONIC CABLE Co.,Ltd. |
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Effective date of registration: 20230808 Address after: 518000 Wall Industrial Park, Lanjing North Road, Longtian street, Pingshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Woer Heat-shrinkable Material Co.,Ltd. Patentee after: CHANGZHOU WOER HEAT-SHRINKABLE MATERIAL Co.,Ltd. Address before: 518118 Wool Industrial Park, Lanjing North Road, Longtian Street, Pingshan District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Woer Heat-shrinkable Material Co.,Ltd. Patentee before: SHENZHEN WOER NEW ENERGY ELECTRICAL TECHNOLOGY Co.,Ltd. Patentee before: CHANGZHOU WOER HEAT-SHRINKABLE MATERIAL Co.,Ltd. |
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