CN203338886U - 800kV gas insulation composite bushing - Google Patents
800kV gas insulation composite bushing Download PDFInfo
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- CN203338886U CN203338886U CN2011205387065U CN201120538706U CN203338886U CN 203338886 U CN203338886 U CN 203338886U CN 2011205387065 U CN2011205387065 U CN 2011205387065U CN 201120538706 U CN201120538706 U CN 201120538706U CN 203338886 U CN203338886 U CN 203338886U
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- insulated
- bushing
- composite bushing
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Abstract
The utility model discloses an 800kV gas insulation composite bushing, comprising an insulation tube, a jacket wrapping the insulation tube, at least one umbrella skirt arranged on the outer part of the jacket, flanges arranged on two ends of the insulation tube, an upper seal plate fixed on the flange, a connection terminal connected to one side, a central conductor connected to the other side and insulation gas arranged within the hollow insulation tube. The voltage of the 8000kV insulation bushing is AC extra high voltage 800kV, which satisfies the high requirements for the mechanical and electric performance, and has a reliable performance and a reasonable design margin.
Description
Technical field
The present invention relates to a kind of electrical circuitry equipment equipment, particularly relate to a kind of a kind of 800kV gas-insulated composite bushing be used in the power industry High-Voltage Electrical Appliances.
Background technology
It requires more harsh for the sleeve pipe of large electric pressure.Traditional switch mainly adopts high-strength ceramic to make with the effective insulator of cover, along with going from bad to worse of weather conditions and environment, electroporcelain material will expose intrinsic defect, and main the realization is: hydrophobicity and migration of hydrophobicity are compared poor with silicon rubber, therefore anti-rain dodges, pollution flashover voltage is low; The characteristics of electroceramics fragility make integral cannula poor seismic behavior, easily broken; Electroceramics class insulator technique is comparatively complicated in addition, and rate of finished products is not high.For the 800kV sleeve pipe according to Experience Design in the past, size is larger, insulation level requires the highest, the design and fabrication technology difficulty is very big, the external producer that only has at present minority can develop the sleeve pipe of this electric pressure, but external some performance parameter of product can not be applicable to the actual needs of China 750kV power grid construction.
At present, the composite bushing range of application that replaces bushing insulator
At present, replace the composite bushing range of application of bushing insulator just at expanding day, the insulated tube material that this sleeve pipe plays the mechanical support effect is fiberglass reinforced plastics, external insulation is silicone rubber jacket, silicone rubber jacket has good mechanics and electric property, hydrophobicity and migration of hydrophobicity are stronger, and insulated tube has good mechanical performance, so composite bushing has the characteristics such as lightweight, anti-rain sudden strain of a muscle, pollution flashover, antidetonation.With respect to bushing insulator, the process controllability of composite bushing is stronger, and rate of finished products is higher.
In sum, traditional 800kV gases at high pressure insulating sleeve exist the external insulation antifouling property and explosion-proof, anti-seismic performance is not good, manufacture difficulty is larger, rate of finished products is not high, be not easy to install and transportation, the problems such as overall cost is higher, because the use of joint product can overcome the above deficiency of existing bushing insulator, the development of 800kV high-pressure composite sleeve is imperative.
Summary of the invention
In view of this, be necessary to provide a kind of 800kV gas-insulated composite bushing
A kind of 800kV gas-insulated composite bushing, it comprises an insulated tube, a sheath that is coated on this insulated tube outside, and at least one is arranged on the full skirt in this sheath outside, be positioned at the flange at insulated tube two ends, be fixed in the upper sealing plate on flange, be connected in the binding post of a side, be connected in the center conductor of opposite side, be positioned at the insulating gas of hollow insulated tube inside, this insulating gas is SF
6gas.
Compared with prior art, the voltage of gas insulated bushing involved in the present invention is for exchanging superhigh pressure 800kV, and that product has met is electric, mechanical performance requires high requirement, has the characteristics such as dependable performance, design margin be reasonable.
Sleeve pipe involved in the present invention fills SF meeting under the prerequisite of electric property
6the pressure of gas is minimum is 0.35MPa (gauge pressure), is significantly less than the minimum pressure of existing sleeve pipe while normally moving, and the characteristics of low pressure have enlarged the scope of application of sleeve pipe involved in the present invention, can use under the harsh natural conditions of low temperature; The use of low pressure EHV bushing avoided because of improve that cost that the integral sealing rank brings increases may, and can effectively reduce SF
6the use amount of gas, reduced the environmental pollution that this gas leakage causes.
The insulator that sleeve pipe involved in the present invention uses is hollow combined insulator, and hollow combined insulator is used and can integral cannula to have that total weight is light, installation and transportation convenient; The characteristics such as anti-pollution characteristic is good, explosion-proof and anti-seismic performance is strong, anti-damage performance is excellent.
Sleeve pipe involved in the present invention adopts the double layer screen electrode structure, inside fills SF
6gas, inner electric field and outer electric field is evenly distributed, customer service the condenser-type terminal partial discharge quantity large, the defects such as dielectric loss angular factor height, with condenser-type terminal, compare simultaneously have simple in structure, manufacture and assembling process simple.
Sleeve pipe involved in the present invention adopts bucking electrode end in the double layer screen electrode structure to adopt the multi-section circular arc smooth connection, the employing electrostatic field analysis is calculated, effectively overcome the problem that the shield end electric field line distribution is concentrated, electric potential gradient is excessive, field intensity is excessive, make Electric Field Distribution more even, improve the sleeve pipe insulation level, reduced partial discharge quantity.
Sleeve pipe involved in the present invention adopts the double layer screen electrode structure mainly to comprise intershield and earth shield two parts, intershield forms integral body by insulated support and lower shrouding, be fixedly connected on the insulator lower flange, insulated support adopts small angle inclination to install, both guaranteed bonding strength, guaranteed again insulated support and housing between clearance for insulation.The earth shield end adopts the multi-section circular arc smooth connection, and for guaranteeing the clearance for insulation between earth shield and intershield, intershield, in corresponding regional indent, adopts the multi-section circular arc smooth connection equally; The global design scheme of double-layer shielding structure, effectively guarantee the axiality requirement between center conductor, double layer screen and insulated tube, Electric Field Distribution is even, efficiently solves internal field's line concentrated problem that distributes, there is insulation level high, the characteristics that partial discharge quantity is little.
Involved in the present invention center conductor that sleeve pipe adopts is divided into two sections, for superhigh pressure 800kV gas sleeve pipe overall height more than 8m, the center conductor difficulty of processing is larger, form and position tolerance can't be controlled effectively, adopt segmentation structure can reduce difficulty of processing, two sections center conductors adopt flanges to be connected, and connecting portion adopts silver-plated processing, have guaranteed integrally-built intensity when improving the through-current capability of center conductor.
Involved in the present invention center conductor that sleeve pipe adopts adopts the processing of major diameter aluminum pipe, effectively reduces the kelvin effect impact, and the material conductance is up to more than 26MS/m, and current density allowable is large, and through-current capability is strong.
Sleeve pipe involved in the present invention, by strict electric Field Calculation, is designed reasonable integral structure, and Electric Field Distribution is scheme comparatively uniformly, has good electric property, part high-volume maximum lower than standard-required.
the accompanying drawing explanation
Accompanying drawing 1 is a kind of 800kV gas-insulated composite bushing structural representation provided by the present invention.
embodiment
Illustrate referring to the drawings Fig. 1, in conjunction with the embodiments to a kind of 800kV SF of the present invention
6the gas-insulated composite bushing is done further detailed description.
A kind of 800kV SF of the present invention
6the gas-insulated composite bushing mainly plays outlet insulation and the outlet supporting role of ultra-high pressure switch equipment, mainly comprises hollow combined insulator, center conductor, grading ring and double shield structure etc.
Double shield structure is comprised of intershield 1, earth shield 2, by hollow combined insulator 4, is connected, and is fixedly mounted on upper sealing plate 3.
The insulated tube of hollow combined insulator 4 adopts high strength glass fiber reinforcing material (FRP), passes through wet winding technology; Silicone rubber jacket and cluster parachute adopt high-temperature silicon disulfide rubber (HTV) material, by integral body, vacuumize injection moulding, and umbellate form is one group according to size, and adjacent arrangement forms cluster parachute successively; On insulator, lower flange adopts high strength, corrosion-resistant cast aluminium alloy (ZL101A), with the die cast moulding, and warp
Cross the T6 solution treated.
Binding post 2 and upper sealing plate 3 are threaded connection, the opposite side of upper sealing plate be connected with center conductor (on) 5, center conductor is connected on upper sealing plate by flange.Center conductor is divided into two sections, center conductor (on) 5 and center conductor (under) 6 junctions are flange, guarantee the bulk strength of center conductor.For guaranteeing the through-current capability of center conductor, silver-plated processing has all been carried out at above all electrical connection positions.Double-layer shielding structure is connected on lower shrouding 9, and then whole assembling is fixed on hollow combined insulator 4 lower flanges.Center conductor through insulated tube, double shield structure, stretches out the lower flange length-specific successively.In assembling process, for guaranteeing being uniformly distributed of electric field, there is the requirement of concentricity tolerance between insulated tube, double layer screen and center conductor.
Bucking electrode adopts the drum design, by spinning process, easy processing and the high aluminium alloy of conductance are made, the smooth circular arc of employing multistage of bucking electrode end is formed by connecting, and this design makes the Electric Field Distribution of bucking electrode end even, reduces the electric field strength at this place.Bucking electrode comprises intershield electrode 7 and earth shield electrode 8, intershield electrode 7 is fixed on lower shrouding 9 by the insulated support 10 that is evenly distributed on lower end, insulated support 10 becomes small angle inclination with central axis, and earth shield electrode 8 is threaded and is fixed on lower shrouding 9.
With the gas insulated bushing of existing conventional electric pressure, compare, the present invention has following characteristics:
Sleeve pipe involved in the present invention fills SF meeting under the prerequisite of electric property
6the pressure of gas is minimum is 0.35MPa (gauge pressure), is significantly less than the minimum pressure of existing sleeve pipe while normally moving, and the characteristics of low pressure have enlarged the scope of application of sleeve pipe involved in the present invention, can use under the harsh natural conditions of low temperature; The use of low pressure EHV bushing avoided because of improve that cost that the integral sealing rank brings increases may, and can effectively reduce SF
6the use amount of gas, reduced the environmental pollution that this gas leakage causes.
Sleeve pipe involved in the present invention adopts the double layer screen electrode structure, inside fills SF
6gas, inner electric field and outer electric field is evenly distributed, customer service the condenser-type terminal partial discharge quantity large, the defects such as dielectric loss angular factor height, with condenser-type terminal, compare simultaneously have simple in structure, manufacture and assembling process simple.
In addition, those skilled in the art can also do other variation in spirit of the present invention, as long as it does not depart from technique effect of the present invention, all should be included in the present invention's scope required for protection.
Claims (2)
1. a 800kV gas-insulated composite bushing, it comprises an insulated tube, a sheath that is coated on this insulated tube outside, and at least one is arranged on the full skirt in this sheath outside, be positioned at the flange at insulated tube two ends, be fixed in the upper sealing plate on flange, be connected in the binding post of a side, be connected in the center conductor of opposite side, be positioned at the insulating gas of hollow insulated tube inside, it is characterized in that: described insulating gas is SF
6gas.
2. a kind of 800kV gas-insulated composite bushing as claimed in claim 1, it is characterized in that: described sheath and full skirt are made by high-temperature silicon disulfide rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205387065U CN203338886U (en) | 2011-12-20 | 2011-12-20 | 800kV gas insulation composite bushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205387065U CN203338886U (en) | 2011-12-20 | 2011-12-20 | 800kV gas insulation composite bushing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203338886U true CN203338886U (en) | 2013-12-11 |
Family
ID=49707550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205387065U Expired - Lifetime CN203338886U (en) | 2011-12-20 | 2011-12-20 | 800kV gas insulation composite bushing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203338886U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672836A (en) * | 2012-08-31 | 2014-03-26 | 宁波新乐生活电器有限公司 | Automatic water adding evaporation pan |
| CN106159845A (en) * | 2016-08-15 | 2016-11-23 | 江苏智达高压电气有限公司 | A kind of extra-high voltage SF6 gas-insulated wall bushing |
| CN106841945A (en) * | 2017-02-08 | 2017-06-13 | 哈尔滨理工大学 | A kind of photoelectricity binary channel bushing for measuring the inferior discharge parameter of gas soup |
-
2011
- 2011-12-20 CN CN2011205387065U patent/CN203338886U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672836A (en) * | 2012-08-31 | 2014-03-26 | 宁波新乐生活电器有限公司 | Automatic water adding evaporation pan |
| CN103672836B (en) * | 2012-08-31 | 2016-08-24 | 宁波新乐生活电器有限公司 | A kind of automatic watering vaporizing pot |
| CN106159845A (en) * | 2016-08-15 | 2016-11-23 | 江苏智达高压电气有限公司 | A kind of extra-high voltage SF6 gas-insulated wall bushing |
| CN106159845B (en) * | 2016-08-15 | 2018-01-26 | 江苏智达高压电气有限公司 | A kind of extra-high voltage SF6 gas-insulated wall bushings |
| WO2018032716A1 (en) * | 2016-08-15 | 2018-02-22 | 江苏智达高压电气有限公司 | Ultra-high voltage wall bushing with sf6 gas insulation |
| CN106841945A (en) * | 2017-02-08 | 2017-06-13 | 哈尔滨理工大学 | A kind of photoelectricity binary channel bushing for measuring the inferior discharge parameter of gas soup |
| CN106841945B (en) * | 2017-02-08 | 2023-06-20 | 哈尔滨理工大学 | Photoelectric double-channel high-voltage sleeve for measuring gas thonson discharge parameters |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131211 |