CN104300465A - Outdoor part of high-pressure wall bushing with electric field distribution balancing function - Google Patents
Outdoor part of high-pressure wall bushing with electric field distribution balancing function Download PDFInfo
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- CN104300465A CN104300465A CN201410585751.4A CN201410585751A CN104300465A CN 104300465 A CN104300465 A CN 104300465A CN 201410585751 A CN201410585751 A CN 201410585751A CN 104300465 A CN104300465 A CN 104300465A
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Abstract
The invention discloses an outdoor part of a high-pressure wall bushing with the electric field distribution balancing function. According to the outdoor part of the high-pressure wall bushing with the electric field distribution balancing function, a middle electrode, a grounding electrode and a stress cone are arranged, distribution of an electric field close to an outer electrode can be improved, and the insulation intensity of a medium is improved.
Description
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Technical field
The present invention relates to electrical equipment, particularly, relate to the outdoor part of the high-voltage wall bushing of the balanced Electric Field Distribution of a kind of energy.
Background technology
Bushing belongs to power station, electric information high-tension insulator.When high-voltage current conductor needs through the technology case shell different from its current potential or wall etc. time, bushing will be used.Bushing mainly plays a part to make lead-in wire contrast insulation and fix.Introduce current－carrying conductor or draw the electric equipment metal shell such as transformer, circuit breaker, capacitor, belong to electrical equipment sleeve pipe; Current－carrying conductor is belonged to power station sleeve pipe through building or wall.
Sleeve pipe is that the center of inserting the electrode of another different potentials by an electrode is formed, so be the insulation system that a kind of typical electric field has strong perpendicular media surface component, dielectric easily punctures; The voltage's distribiuting on its surface is very uneven, very concentrated at the electric field of the edge of external electrode, is easy to start from here corona and gliding spark discharge occur.The Electric Field Distribution near external electrode must be improved for this reason, improve the dielectric strength of medium.
Summary of the invention
Technical problem to be solved by this invention is to provide the outdoor part of the high-voltage wall bushing of the balanced Electric Field Distribution of a kind of energy, the outdoor part of the high-voltage wall bushing of the balanced Electric Field Distribution of this kind of energy is by arranging target and grounding electrode and stress cone, the Electric Field Distribution near external electrode can be improved, improve the dielectric strength of medium.
The present invention's adopted technical scheme that solves the problem is:
The outdoor part of the high-voltage wall bushing of the balanced Electric Field Distribution of energy, comprise guide rod, interior insulation system, external insulation structure, binding post and metal-ware, described metal-ware is arranged on external insulation structure, the coated interior insulation system of external insulation structure, interior insulation system is coated with guide rod, and guide rod is connected with binding post;
Described interior insulation system comprises target, grounding electrode, two stress cones and epoxy resin layer, target, grounding electrode and two stress cones are all coated in epoxy resin layer, a stress cone is connected with target, grounding electrode is connected with another stress cone, described target is arranged on the side near guide rod, and grounding electrode is arranged on the right side of target;
Described external insulation structure is silicone rubber jacket layer, and silicone rubber jacket layer is provided with full skirt;
Described metal-ware comprises radome, metallic sheath and flange, described radome is arranged on binding post and guide rod junction and runs through epoxy resin layer and the external insulation structure of interior insulation system, and described metallic sheath to be arranged on outside external insulation structure and to be connected with flange.
Thinking of the present invention: the condition that the interior insulation system of sleeve pipe and external insulation structure must meet has: 1, harmful partial discharge occurs in long-term work voltage bottom; 2, within 1 minute, under power frequency withstand test voltage, there is not gliding spark discharge; 3, insulate without destroying under power frequency and impact resistance test voltage.In bushing, electric field is all uneven along the distribution of casing length direction and vertical direction, for improving the Electric Field Distribution near external electrode, improving the dielectric strength of medium, introducing stress cone structural design in interior insulation system.Stress cone can be the electric field of steady state value evenly near flange along the electric field axial component of the conical surface according to the dimensionally stable of its conical surface, the phenomenon that the electric field improving flange attachment is too concentrated.Target and grounding electrode is adopted to replace multiple electrodes of traditional sleeve, again with stress cone with the use of, wherein grounding electrode and metallic sheath and the same current potential of flange, it is all earth potential, shielding action is played to metallic sheath, target is floating electrode, and to make its voltage substantially be the alive half of external insulation structure to the length of adjustment target, and the voltage between guide rod with target equal with the voltage between target with grounding electrode be exactly our needs.
The length of the length of target and radius and grounding electrode and radius can make the voltage between guide rod with target equal with the voltage between target with grounding electrode.For controlling the electric field homogenizing of inside pipe casing and sleeve surface, voltage between guide rod and target and between target and grounding electrode such as need to meet at the capacitance principle, therefore, the reasonable setting of the length of target and the length of radius and grounding electrode and radius the capacitance principle such as can to meet and makes the voltage between target equal with the voltage between target with grounding electrode.
The length of described external insulation structure is 15-20cm.The one-sided insulated lengths of high-voltage wall bushing is limited by the aerial flashover voltage of external insulation, if length is not saturating, will cause air breakdown.Therefore one-sided insulated lengths should select suitable length, generally according to formula: (flashover voltage-14)/3.16 tentatively can obtain the length of insulation system.And for such as 110kV bushing, lightning impulse dry withstand voltage is 550kV, its one-sided insulated lengths is about 16cm.
Described guide rod is copper bar.
The silicone rubber jacket layer of described external insulation structure is the rubber through post vulcanization.Silicon rubber through post vulcanization has good compression, dielectric property and stable mechanical performance, makes full skirt with this, and the performance such as the electrical insulating property of silastic material excellence, resistance to amblent air temperature impact can be made to be not fully exerted.
To sum up, the invention has the beneficial effects as follows:
The present invention, by arranging target and grounding electrode and stress cone, can improve the Electric Field Distribution near external electrode, improves the dielectric strength of medium.
Accompanying drawing explanation
Fig. 1 is structure chart of the present invention.
Mark and corresponding parts title in accompanying drawing:
1, guide rod, 2, binding post, 3, external insulation part, 4, radome, 5, interior insulation system, 6, stress cone, 7, target, 8, grounding electrode, 9, metal skirt, 10, full skirt.
Embodiment
Below in conjunction with embodiment and accompanying drawing, to the detailed description further of the present invention's do, but embodiments of the present invention are not limited thereto.
Embodiment 1
As shown in Figure 1, the outdoor part of the high-voltage wall bushing of the balanced Electric Field Distribution of energy, comprise guide rod 1, interior insulation system 5, external insulation structure, binding post 2 and metal-ware, described metal-ware is arranged on external insulation structure, the coated interior insulation system 5 of external insulation structure, interior insulation system 5 is coated with guide rod 1, and guide rod 1 is connected with binding post 2;
Described interior insulation system 5 comprises target 7, grounding electrode 8, two stress cones 6 and epoxy resin layers, target 7, grounding electrode 8 and two stress cones 6 are all coated in epoxy resin layer, a stress cone 6 is connected with target 7, grounding electrode 8 is connected with another stress cone 6, described target 7 is arranged on the side near guide rod 1, and grounding electrode 8 is arranged on the right side of target 7;
Described external insulation structure is silicone rubber jacket layer, silicone rubber jacket layer is provided with full skirt 10;
Described metal-ware comprises radome 4, metallic sheath and flange, described radome 4 is arranged on binding post 2 and guide rod 1 junction and runs through epoxy resin layer and the external insulation structure of interior insulation system 5, and described metallic sheath to be arranged on outside external insulation structure and to be connected with flange.
Thinking of the present invention: the condition that interior insulation system 5 and the external insulation structure of sleeve pipe must meet has: 1, harmful partial discharge occurs in long-term work voltage bottom; 2, within 1 minute, under power frequency withstand test voltage, there is not gliding spark discharge; 3, insulate without destroying under power frequency and impact resistance test voltage.In bushing, electric field is all uneven along the distribution of casing length direction and vertical direction, for improving the Electric Field Distribution near external electrode, improving the dielectric strength of medium, introducing stress cone 6 structural design in interior insulation system 5.Stress cone 6 can be the electric field of steady state value evenly near flange along the electric field axial component of the conical surface according to the dimensionally stable of its conical surface, the phenomenon that the electric field improving flange attachment is too concentrated.Target 7 and grounding electrode 8 is adopted to replace multiple electrodes of traditional sleeve, again with stress cone 6 with the use of, wherein grounding electrode 8 and metallic sheath and the same current potential of flange, it is all earth potential, shielding action is played to metallic sheath, target 7 is floating electrode, to make its voltage be substantially the alive half of external insulation structure to the length of adjustment target 7, and the voltage between guide rod 1 with target 7 equal with the voltage between target 7 with grounding electrode 8 be exactly that we need.
Embodiment 2:
As shown in Figure 1, and embodiment 1 is similar, and difference is:
The length of the length of target 7 and radius and grounding electrode 8 and radius can make the voltage between guide rod 1 with target 7 equal with the voltage between target 7 with grounding electrode 8.For controlling the electric field homogenizing of inside pipe casing and sleeve surface, voltage between guide rod 1 and target 7 and between target 7 and grounding electrode 8 such as need to meet at the capacitance principle, therefore, the reasonable setting of the length of target 7 and the length of radius and grounding electrode 8 and radius the capacitance principle such as can to meet and makes the voltage between target 7 equal with the voltage between target 7 with grounding electrode 8.
The length of described external insulation structure is 15-20cm.The one-sided insulated lengths of high-voltage wall bushing is limited by the aerial flashover voltage of external insulation, if length is not saturating, will cause air breakdown.Therefore one-sided insulated lengths should select suitable length, generally according to formula: flashover voltage-14/3.16 tentatively can obtain the length of insulation system.And for such as 110kV bushing, lightning impulse dry withstand voltage is 550kV, its one-sided insulated lengths is about 16cm.
Described guide rod 1 is copper bar.
The silicone rubber jacket layer of described external insulation structure is the rubber through post vulcanization.Silicon rubber through post vulcanization has good compression, dielectric property and stable mechanical performance, makes full skirt 10, the performance such as the electrical insulating property of silastic material excellence, resistance to amblent air temperature impact can be made to be not fully exerted with this.
As mentioned above, the present invention can be realized preferably.
Claims (5)
1. the outdoor part of the high-voltage wall bushing of the balanced Electric Field Distribution of energy, it is characterized in that, comprise guide rod (1), interior insulation system (5), external insulation structure, binding post (2) and metal-ware, described metal-ware is arranged on external insulation structure, the coated interior insulation system (5) of external insulation structure, interior insulation system (5) is coated with guide rod (1), and guide rod (1) is connected with binding post (2);
Described interior insulation system (5) comprises target (7), grounding electrode (8), two stress cones (6) and epoxy resin layer, target (7), grounding electrode (8) and two stress cones (6) are all coated in epoxy resin layer, a stress cone (6) is connected with target (7), grounding electrode (8) is connected with another stress cone (6), described target (7) is arranged on the side near guide rod (1), and grounding electrode (8) is arranged on the right side of target (7);
Described external insulation structure is silicone rubber jacket layer, silicone rubber jacket layer is provided with full skirt (10);
Described metal-ware comprises radome (4), metallic sheath and flange, described radome (4) is arranged on binding post (2) and guide rod (1) junction and runs through epoxy resin layer and the external insulation structure of interior insulation system (5), and described metallic sheath to be arranged on outside external insulation structure and to be connected with flange.
2. the outdoor part of the high-voltage wall bushing of the balanced Electric Field Distribution of energy according to claim 1, it is characterized in that, the length of the length of target (7) and radius and grounding electrode (8) and radius can make the voltage between guide rod (1) with target (7) equal with the voltage between target (7) with grounding electrode (8).
3. the outdoor part of the high-voltage wall bushing of the balanced Electric Field Distribution of energy according to claim 1, is characterized in that, the length of described external insulation structure is 15-20cm.
4. the outdoor part of the high-voltage wall bushing of the balanced Electric Field Distribution of energy according to claim 1, is characterized in that, described guide rod (1) is copper bar.
5. the outdoor part of the high-voltage wall bushing of the balanced Electric Field Distribution of energy according to claim 1, is characterized in that, the silicone rubber jacket layer of described external insulation structure is the rubber through post vulcanization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410585751.4A CN104300465A (en) | 2014-10-28 | 2014-10-28 | Outdoor part of high-pressure wall bushing with electric field distribution balancing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410585751.4A CN104300465A (en) | 2014-10-28 | 2014-10-28 | Outdoor part of high-pressure wall bushing with electric field distribution balancing function |
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| Publication Number | Publication Date |
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| CN104300465A true CN104300465A (en) | 2015-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410585751.4A Pending CN104300465A (en) | 2014-10-28 | 2014-10-28 | Outdoor part of high-pressure wall bushing with electric field distribution balancing function |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2175479Y (en) * | 1993-10-06 | 1994-08-24 | 黄维枢 | High voltage insulating wall-through sleeve |
| CN2430802Y (en) * | 2000-04-24 | 2001-05-16 | 方静 | Dry high voltage sleeve |
| CN2591820Y (en) * | 2003-01-07 | 2003-12-10 | 孙闻峰 | Dry high-voltage sleeve |
| CN2646835Y (en) * | 2002-09-27 | 2004-10-06 | 北京中能瑞斯特电气有限责任公司 | A high-tension bushing |
| CN201398049Y (en) * | 2009-03-13 | 2010-02-03 | 中能电力科技开发有限公司 | Dry type high voltage bushing |
| CN204167834U (en) * | 2014-10-28 | 2015-02-18 | 成都峰达科技有限公司 | A kind of outdoor part of high-voltage wall bushing |
-
2014
- 2014-10-28 CN CN201410585751.4A patent/CN104300465A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2175479Y (en) * | 1993-10-06 | 1994-08-24 | 黄维枢 | High voltage insulating wall-through sleeve |
| CN2430802Y (en) * | 2000-04-24 | 2001-05-16 | 方静 | Dry high voltage sleeve |
| CN2646835Y (en) * | 2002-09-27 | 2004-10-06 | 北京中能瑞斯特电气有限责任公司 | A high-tension bushing |
| CN2591820Y (en) * | 2003-01-07 | 2003-12-10 | 孙闻峰 | Dry high-voltage sleeve |
| CN201398049Y (en) * | 2009-03-13 | 2010-02-03 | 中能电力科技开发有限公司 | Dry type high voltage bushing |
| CN204167834U (en) * | 2014-10-28 | 2015-02-18 | 成都峰达科技有限公司 | A kind of outdoor part of high-voltage wall bushing |
Non-Patent Citations (1)
| Title |
|---|
| 张丽娜: ""±1000kV直流穿墙套管的电场分布研究"", 《中国优秀硕士学位论文全文数据库工程科技II辑》 * |
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Application publication date: 20150121 |