CN105469958A - High-current glue-impregnated fiber dry type capacitive type transformer bushing - Google Patents
High-current glue-impregnated fiber dry type capacitive type transformer bushing Download PDFInfo
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- CN105469958A CN105469958A CN201610001471.3A CN201610001471A CN105469958A CN 105469958 A CN105469958 A CN 105469958A CN 201610001471 A CN201610001471 A CN 201610001471A CN 105469958 A CN105469958 A CN 105469958A
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- capacitance
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
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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
- H01B17/26—Lead-in insulators; Lead-through insulators
- H01B17/28—Capacitor type
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
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Abstract
The invention discloses a high-current glue-impregnated fiber dry type capacitive type transformer bushing. The transformer bushing comprises a metal conductor, a thin-wall aluminum pipe, a capacitive voltage-dividing type insulating cylinder, a silicone rubber umbrella skirt and a metal flange, wherein the thin-wall aluminum pipe is arranged on the outer side of the metal conductor in a sleeving manner; a cooling oil channel is formed between the thin-wall aluminum pipe and the metal conductor; the thin-wall aluminum pipe is connected with the metal conductor in an equipotential manner; the capacitive voltage-dividing type insulating cylinder winds the outer side of the thin-wall aluminum pipe; multiple layers of capacitive screens are arranged in the capacitive voltage-dividing type insulating cylinder; the silicone rubber umbrella skirt is arranged on the outer side of the capacitive voltage-dividing type insulating cylinder in a sleeving manner; and the metal flange is fixedly connected with the capacitive voltage-dividing type insulating cylinder. The transformer bushing adopts the capacitive voltage-dividing mode based on a principle of equal capacitance and equal voltage; high voltage is uniformly allocated to each capacitor; the voltage on each capacitor is the same, so that even radial electric field intensity is ensured; and due to the equidistance gradient of the capacitive screens, the axial electric field intensity is even also.
Description
Technical field
The present invention relates to a kind of big current glue leaching fiber dry-type capacitance type bushing shell for transformer.
Background technology
At present, widely used strong current transformer sleeve pipe is mainly assembled by metallic conductor, insulator and metal flange, is filled with the thick transformer oil of 30mm and uses as insulation and cooling between insulator and electric conductor.The radial and axial electric field strength of this structure transformer sleeve pipe is uneven, high to the technological requirement of filling transformer oil, easily produces partial discharge, and overall weight weight.
Therefore, design a kind of lightweight, uniform bushing shell for transformer of the radial and axial electric field strength of bushing shell for transformer and become the technical problem that those skilled in the art need solution badly.
Summary of the invention
For Problems existing in background technology, a kind of big current glue is the object of the present invention is to provide to soak fiber dry-type capacitance type bushing shell for transformer, this bushing shell for transformer adopts capacitance partial pressure mode, according to the principle of " waiting electric capacity; wait voltage " during design, high voltage is evenly distributed on each capacitor, and the voltage that each capacitor is born is identical, ensure that the even of radial electric field intensity; Again due to the effect of the equidistant ladder difference of capacitance plate, axial electric field strength is also uniform.
The object of the invention is to be achieved through the following technical solutions:
A kind of big current glue leaching fiber dry-type capacitance type bushing shell for transformer, described bushing shell for transformer comprises metallic conductor, thin-wall aluminium pipe, capacitance-voltage-distributing type insulating cylinder, silicon rubber umbrella skirt and metal flange; Wherein, described thin-wall aluminium pipe is set in outside described metallic conductor, is provided with cooling oil duct between thin-wall aluminium pipe and metallic conductor, and thin-wall aluminium pipe is connected with metallic conductor equipotential; Described capacitance-voltage-distributing type insulating cylinder is set in outside described thin-wall aluminium pipe; Some layer capacitances screen is provided with in capacitance-voltage-distributing type insulating cylinder; Described silicon rubber umbrella skirt is set in outside described capacitance-voltage-distributing type insulating cylinder, and described metal flange is fixedly connected with capacitance-voltage-distributing type insulating cylinder.
Further, the length of the described capacitance plate of some layers is according to the equal principle of capacitance, and progressively shorten from inside to outside, form equidistant ladder poor, outermost layer capacitance plate is by lead-in wire and the ejector be arranged on metal flange.
Further, described capacitance-voltage-distributing type insulating cylinder is made up of glass fibre and epoxy resin.
Further, described capacitance plate is made up of low resistance semi-conductive tape.
Further, cooling oil duct thickness is provided with between described thin-wall aluminium pipe and described metallic conductor.
Further, the junction, upper end of described capacitance-voltage-distributing type insulating cylinder and metallic conductor is provided with sealing ring, and the junction, lower end of capacitance-voltage-distributing type insulating cylinder and metallic conductor is provided with spring attachment.
Further, described spring attachment is fixedly installed on the lower end of described metallic conductor, and described spring attachment is made up of several little springs and spring base.
Further, described sealing ring is made up of oil-resistant acrylonitrile-butadirubber rubber.
The present invention has following positive technique effect:
The bushing shell for transformer of the application adopts capacitance partial pressure mode, and according to the principle of " wait electric capacity, wait voltage " during design, high voltage is evenly distributed on each capacitor, and the voltage that each capacitor is born is identical, ensure that the even of radial electric field intensity; Again due to the effect of the equidistant ladder difference of capacitance plate, axial electric field strength is also uniform.
Accompanying drawing explanation
Fig. 1 is the semi-section structural map of bushing shell for transformer of the present invention;
Fig. 2 is the semi-section structural map of capacitance-voltage-distributing type insulating cylinder of the present invention;
Fig. 3 is the circuit diagram of equivalent capacitance of the present invention.
Embodiment
Below, with reference to accompanying drawing, the present invention is more fully illustrated, shown in the drawings of exemplary embodiment of the present invention.But the present invention can be presented as multiple multi-form, and should not be construed as the exemplary embodiment being confined to describe here.But, these embodiments are provided, thus make the present invention comprehensively with complete, and scope of the present invention is fully conveyed to those of ordinary skill in the art.
For ease of illustrating, here can use such as " on " the space relative terms such as D score " left side " " right side ", for illustration of the element of shown in figure or the feature relation relative to another element or feature.It should be understood that except the orientation shown in figure, spatial terminology is intended to comprise device different azimuth in use or operation.Such as, if the device in figure is squeezed, be stated as the element being positioned at other elements or feature D score will be positioned at other elements or feature " on ".Therefore, exemplary term D score can comprise upper and lower both orientation.Device can otherwise be located (90-degree rotation or be positioned at other orientation), and space used here illustrates relatively can correspondingly explain.
As Figure 1-3, big current glue leaching fiber dry-type capacitance type bushing shell for transformer of the present invention comprises metallic conductor 1, thin-wall aluminium pipe 3, capacitance-voltage-distributing type insulating cylinder 4, insulation full skirt 7 and metal flange 9; Wherein, thin-wall aluminium pipe 3 is set in outside metallic conductor 1, is provided with cooling oil duct 6 between thin-wall aluminium pipe 3 and metallic conductor 1, and thin-wall aluminium pipe 3 is connected with metallic conductor 1 equipotential; Capacitance-voltage-distributing type insulating cylinder 4 cover is wrapped in outside thin-wall aluminium pipe 3; Some layer capacitances screen 5 is provided with in capacitance-voltage-distributing type insulating cylinder 4; Insulation full skirt 7 is set in outside capacitance-voltage-distributing type insulating cylinder 4, and metal flange 9 is fixedly connected with capacitance-voltage-distributing type insulating cylinder 4.
In addition, the length of the some layer capacitances screen 5 of the application is according to the equal principle of capacitance, and progressively shorten from inside to outside, form equidistant ladder poor, outermost layer capacitance plate is connected with the ejector 8 be arranged on metal flange 9 by lead-in wire 11; According to the principle of " wait electric capacity, wait voltage ", high voltage is evenly distributed on each capacitor, and the voltage that each capacitor is born is identical, ensure that the even of radial electric field intensity; Again due to the effect of the equidistant ladder difference of capacitance plate, axial electric field strength is also uniform.
Preferably, the capacitance-voltage-distributing type insulating cylinder 4 of the application is made up of glass fibre and epoxy resin, and its advantage is good insulation preformance, and mechanical strength is high; And capacitance plate 5 is made up of low resistance semi-conductive tape; Cooling oil duct 6 is provided with between thin-wall aluminium pipe 3 and metallic conductor 1.
Preferably, the capacitance-voltage-distributing type insulating cylinder 4 of the application and the junction, upper end of metallic conductor 1 are provided with sealing ring 2, and sealing ring 2 is made up of oil-resistant acrylonitrile-butadirubber rubber; The junction, lower end of capacitance-voltage-distributing type insulating cylinder 4 and metallic conductor 1 is provided with spring attachment 10.Spring attachment 10 is fixedly installed on the lower end of metallic conductor 1, and spring attachment 10 is made up of several little springs and spring base; Ensure that sealing ring 2 has certain decrement by arranging spring attachment 10, can not seepage transformer oil.
The capacitance-voltage-distributing type insulating cylinder 4 of the application uses glass fibre infiltration epoxy resin to be entangled in outside thin-wall aluminium pipe 3 to make; And some layer capacitance screens 5 make by adding low resistance semiconductor band in capacitance-voltage-distributing type insulating cylinder 4 inside, outermost layer capacitance plate connects with a lead-in wire 11 draws, then is wound around about 5mm protective layer, and the material of this protective layer is similarly glass fibre and epoxy resin; The capacitance-voltage-distributing type insulating cylinder 4 wound puts into curing oven, and after solidification, from the flat is processed into given size shape.
Described just in order to the present invention is described above, be construed as the present invention and be not limited to above embodiment, meet the various variants of inventive concept all within protection scope of the present invention.
Claims (6)
1. a big current glue leaching fiber dry-type capacitance type bushing shell for transformer, it is characterized in that, described bushing shell for transformer comprises metallic conductor, thin-wall aluminium pipe, capacitance-voltage-distributing type insulating cylinder, insulation full skirt and metal flange; Wherein, described thin-wall aluminium pipe is set in outside described metallic conductor, is provided with cooling oil duct between thin-wall aluminium pipe and metallic conductor, and thin-wall aluminium pipe is connected with metallic conductor equipotential; Described capacitance-voltage-distributing type insulation jacket casing is wrapped in outside described thin-wall aluminium pipe; Some layer capacitances screen is provided with in capacitance-voltage-distributing type insulating cylinder; Described insulation full skirt is set in outside described capacitance-voltage-distributing type insulating cylinder, and described metal flange is fixedly connected with capacitance-voltage-distributing type insulating cylinder.
2. big current glue leaching fiber dry-type capacitance type bushing shell for transformer according to claim 1, it is characterized in that, the length of the described capacitance plate of some layers is according to the equal principle of capacitance, progressively shorten from inside to outside, form equidistant ladder poor, outermost layer capacitance plate is by lead-in wire and the ejector be arranged on metal flange.
3. big current glue leaching fiber dry-type capacitance type bushing shell for transformer according to claim 1, it is characterized in that, described capacitance-voltage-distributing type insulating cylinder is made up of glass fibre and epoxy resin.
4. big current glue leaching fiber dry-type capacitance type bushing shell for transformer according to claim 1, it is characterized in that, described capacitance plate is made up of low resistance semi-conductive tape.
5. big current glue leaching fiber dry-type capacitance type bushing shell for transformer according to claim 1, is characterized in that, be provided with cooling oil duct between described thin-wall aluminium pipe and described metallic conductor.
6. big current glue leaching fiber dry-type capacitance type bushing shell for transformer according to claim 1, it is characterized in that, described insulation full skirt is made up of silicon rubber, is bonded in outside capacitance-voltage-distributing type insulating cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610001471.3A CN105469958B (en) | 2016-01-05 | 2016-01-05 | A kind of high current glue soaks fiber dry-type capacitance type bushing shell for transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610001471.3A CN105469958B (en) | 2016-01-05 | 2016-01-05 | A kind of high current glue soaks fiber dry-type capacitance type bushing shell for transformer |
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| Publication Number | Publication Date |
|---|---|
| CN105469958A true CN105469958A (en) | 2016-04-06 |
| CN105469958B CN105469958B (en) | 2018-04-03 |
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| CN201610001471.3A Active CN105469958B (en) | 2016-01-05 | 2016-01-05 | A kind of high current glue soaks fiber dry-type capacitance type bushing shell for transformer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019105126A1 (en) * | 2017-12-01 | 2019-06-06 | 江苏神马电力股份有限公司 | Composite insulator and method for manufacturing same, and composite casing |
| CN112420290A (en) * | 2020-10-12 | 2021-02-26 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Integrated pure-dry high-voltage bushing with mounting flange insulation structure and manufacturing method thereof |
| CN112630696A (en) * | 2020-12-07 | 2021-04-09 | 广西电网有限责任公司电力科学研究院 | Capacitive screen coupling simulation testing device |
Citations (7)
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| CN1419250A (en) * | 2003-01-07 | 2003-05-21 | 孙闻峰 | Dry type high-voltage capacitor core and making method thereof |
| CN201130591Y (en) * | 2007-12-20 | 2008-10-08 | 南京智达电气有限公司 | Oil paper condenser type low-voltage great current transformer tube |
| CN101814347A (en) * | 2009-02-19 | 2010-08-25 | 日本碍子株式会社 | Insulating sleeve for oil filling |
| CN103093906A (en) * | 2013-02-07 | 2013-05-08 | 北京国电四维电力技术有限公司 | High voltage casing pipe |
| CN202940110U (en) * | 2012-10-29 | 2013-05-15 | 姚文秋 | Multi-terminal coil out casing pipe of magnetic reactor |
| CN204332499U (en) * | 2014-12-03 | 2015-05-13 | 常州市拓源电缆成套有限公司 | 400-40500 lies prostrate condenser type compound insulated bus structure |
| CN205303142U (en) * | 2016-01-05 | 2016-06-08 | 北京中联科创高压电器有限公司 | Heavy current glue soaks fibre dry -type electric capacity type transformer bushing |
-
2016
- 2016-01-05 CN CN201610001471.3A patent/CN105469958B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1419250A (en) * | 2003-01-07 | 2003-05-21 | 孙闻峰 | Dry type high-voltage capacitor core and making method thereof |
| CN201130591Y (en) * | 2007-12-20 | 2008-10-08 | 南京智达电气有限公司 | Oil paper condenser type low-voltage great current transformer tube |
| CN101814347A (en) * | 2009-02-19 | 2010-08-25 | 日本碍子株式会社 | Insulating sleeve for oil filling |
| CN202940110U (en) * | 2012-10-29 | 2013-05-15 | 姚文秋 | Multi-terminal coil out casing pipe of magnetic reactor |
| CN103093906A (en) * | 2013-02-07 | 2013-05-08 | 北京国电四维电力技术有限公司 | High voltage casing pipe |
| CN204332499U (en) * | 2014-12-03 | 2015-05-13 | 常州市拓源电缆成套有限公司 | 400-40500 lies prostrate condenser type compound insulated bus structure |
| CN205303142U (en) * | 2016-01-05 | 2016-06-08 | 北京中联科创高压电器有限公司 | Heavy current glue soaks fibre dry -type electric capacity type transformer bushing |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019105126A1 (en) * | 2017-12-01 | 2019-06-06 | 江苏神马电力股份有限公司 | Composite insulator and method for manufacturing same, and composite casing |
| CN112420290A (en) * | 2020-10-12 | 2021-02-26 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Integrated pure-dry high-voltage bushing with mounting flange insulation structure and manufacturing method thereof |
| CN112420290B (en) * | 2020-10-12 | 2022-09-16 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Integrated pure-dry high-voltage bushing with mounting flange insulation structure and manufacturing method thereof |
| CN112630696A (en) * | 2020-12-07 | 2021-04-09 | 广西电网有限责任公司电力科学研究院 | Capacitive screen coupling simulation testing device |
| CN112630696B (en) * | 2020-12-07 | 2022-09-09 | 广西电网有限责任公司电力科学研究院 | Capacitive screen coupling simulation testing device |
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| CN105469958B (en) | 2018-04-03 |
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