CN204167022U - A kind of high-voltage wall bushing - Google Patents
A kind of high-voltage wall bushing Download PDFInfo
- Publication number
- CN204167022U CN204167022U CN201420629018.3U CN201420629018U CN204167022U CN 204167022 U CN204167022 U CN 204167022U CN 201420629018 U CN201420629018 U CN 201420629018U CN 204167022 U CN204167022 U CN 204167022U
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- target
- guide rod
- insulation structure
- external insulation
- grounding electrode
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Abstract
The utility model discloses a kind of high-voltage wall bushing, this kind of high-voltage wall bushing, by arranging target and grounding electrode and stress cone, can improve the Electric Field Distribution near external electrode, improve the dielectric strength of medium.
Description
Technical field
The utility model relates to electrical equipment, particularly, relates to a kind of high-voltage wall bushing.
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.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of high-voltage wall bushing, and this kind of high-voltage wall bushing, by arranging target and grounding electrode and stress cone, can improve the Electric Field Distribution near external electrode, improve the dielectric strength of medium.
The technical scheme in the invention for solving the above technical problem is:
A kind of high-voltage wall bushing, comprises outdoor part, flange, current transformer and the indoor part that connect successively;
Described outdoor part comprises insulation system in the first guide rod, first, the first external insulation structure, the first binding post and the first metal-ware, described first metal-ware is arranged on the first external insulation structure, insulation system in first external insulation structure coated first, in first, insulation system is coated with the first guide rod, and the first guide rod is connected with the first binding post;
In described first, insulation system comprises the first target, the first grounding electrode, two the first stress cones and first ring epoxy layer, first target, the first grounding electrode and two the first stress cones are all coated in first ring epoxy layer, first stress cone is connected with the first target, first grounding electrode is connected with another first stress cone, described first target is arranged on the side near the first guide rod, and the first grounding electrode is arranged on the right side of the first target;
Described first external insulation structure is silicone rubber jacket layer, silicone rubber jacket layer is provided with the first full skirt;
Described first metal-ware comprises the first radome, the first metallic sheath, described first radome is arranged on the first binding post and the first guide rod junction and runs through first ring epoxy layer and first external insulation structure of insulation system in first, and described first metallic sheath to be arranged on outside the first external insulation structure and to be connected with flange;
Described indoor part comprises insulation system in the second guide rod, second, the second external insulation structure, the second binding post and the second metal-ware, described second metal-ware is arranged on the second external insulation structure, insulation system in second external insulation structure coated second, in second, insulation system is coated with the second guide rod, and the second guide rod is connected with the second binding post;
In described second, insulation system comprises the second target, the second grounding electrode, two the second stress cones and the second epoxy resin layer, second target, the second grounding electrode and two the second stress cones are all coated in the second epoxy resin layer, second stress cone is connected with the second target, second grounding electrode is connected with another second stress cone, described second target is arranged on the side near the second guide rod, and the second grounding electrode is arranged on the right side of the second target;
Described second external insulation structure is silicone rubber jacket layer, silicone rubber jacket layer is provided with the second full skirt, and the first full skirt shape of described first external insulation structure is larger than the second full skirt shape of the second external insulation structure;
Described second metal-ware comprises secondary shielding cover, the second metallic sheath, described secondary shielding cover is arranged on the second binding post and the second guide rod junction and runs through the second epoxy resin layer and second external insulation structure of insulation system in second, and described second metallic sheath to be arranged on outside the second external insulation structure and to be connected with flange;
The central axes of described first guide rod and the second guide rod, in first insulation system central axis and second in the central axes of insulation system, the central axes of the first external insulation structure and the second external insulation structure.
Thinking of the present utility model: 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 the first target and radius and the first grounding electrode and radius can make the voltage between guide rod with target equal with the voltage between target with grounding electrode.The length of the length of the second target and radius and the second 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 first external insulation structure and the second 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 first guide rod and the second guide rod are copper bar.
The silicone rubber jacket layer of described first external insulation structure and the second 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.
Also comprise earthmeter terminal, described earthmeter terminal is arranged on flange, and earthmeter terminal comprises ground connection cap, outer wall, measured hole and experimental jack, and described measured hole and socket are all positioned on outer wall.Within every 3 years, measure capacitance and the dielectric loss value of a sleeve pipe in operation, undertaken by measurement terminal ad hoc on sleeve pipe adpting flange during measurement.
To sum up, the beneficial effects of the utility model are:
The utility model, 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 utility model;
Fig. 2 is the cutaway view of utility model.
Mark and corresponding parts title in accompanying drawing:
1, outdoor part, the 10, first guide rod, the 11, first full skirt, 12, the first binding post, the 13, first external insulation structure, the 14, first radome, 15, insulation system in first, the 16, first stress cone, the 17, first target, 18, the first grounding electrode, the 19, first metal skirt, 2, indoor part, 21, the second full skirt, the 22, second binding post, 3, earthmeter terminal, 4, flange, 5, current transformer.
Embodiment
Below in conjunction with embodiment and accompanying drawing, to the detailed description further of the utility model do, but execution mode of the present utility model is not limited thereto.
Embodiment 1:
As depicted in figs. 1 and 2, a kind of high-voltage wall bushing, comprises the outdoor part 1, flange 4, current transformer 5 and the indoor part 2 that connect successively;
Described outdoor part 1 comprises insulation system 15, first external insulation structure 13, first binding post 12 and the first metal-ware in the first guide rod 10, first, described first metal-ware is arranged on the first external insulation structure 13, insulation system 15 in first external insulation structure 13 coated first, in first, insulation system 15 is coated with the first guide rod 10, first guide rod 10 and is connected with the first binding post 12;
In described first, insulation system 15 comprises the first target 17, first grounding electrode 18, two the first stress cones 16 and first ring epoxy layer, first target 17, first grounding electrode 18 and two the first stress cones 16 are all coated in first ring epoxy layer, first stress cone 16 is connected with the first target 17, first grounding electrode 18 is connected with another first stress cone 16, described first target 17 is arranged on the side near the first guide rod 10, and the first grounding electrode 18 is arranged on the right side of the first target 17;
Described first external insulation structure 13 is silicone rubber jacket layer, silicone rubber jacket layer is provided with the first full skirt 11;
Described first metal-ware comprises the first radome 14, first metallic sheath, described first radome 14 is arranged on the first binding post 12 and the first guide rod 10 junction and runs through first ring epoxy layer and first external insulation structure 13 of insulation system 15 in first, and described first metallic sheath to be arranged on outside the first external insulation structure 13 and to be connected with flange 4;
Described indoor part 2 comprises insulation system in the second guide rod, second, the second external insulation structure, the second binding post 22 and the second metal-ware, described second metal-ware is arranged on the second external insulation structure, insulation system in second external insulation structure coated second, in second, insulation system is coated with the second guide rod, and the second guide rod is connected with the second binding post 22;
In described second, insulation system comprises the second target, the second grounding electrode, two the second stress cones and the second epoxy resin layer, second target, the second grounding electrode and two the second stress cones are all coated in the second epoxy resin layer, second stress cone is connected with the second target, second grounding electrode is connected with another second stress cone, described second target is arranged on the side near the second guide rod, and the second grounding electrode is arranged on the right side of the second target;
Described second external insulation structure is silicone rubber jacket layer, silicone rubber jacket layer is provided with the second full skirt 21, and the first full skirt 11 shape of described first external insulation structure 13 is larger than the second full skirt 21 shape of the second external insulation structure;
Described second metal-ware comprises secondary shielding cover, the second metallic sheath, described secondary shielding cover is arranged on the second binding post and the second guide rod junction and runs through the second epoxy resin layer and second external insulation structure of insulation system in second, and described second metallic sheath to be arranged on outside the second external insulation structure and to be connected with flange 4;
The central axes of described first guide rod 10 and the second guide rod, in first insulation system 15 central axis and second in the central axes of insulation system, the central axes of the first external insulation structure 13 and the second external insulation structure.
Thinking of the present utility model: 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.
Embodiment 2:
As shown in Figure 1, and embodiment 1 is similar, and difference is:
The length of the length of the first target 17 and radius and the first grounding electrode 18 and radius can make the voltage between guide rod with target equal with the voltage between target with grounding electrode.The length of the length of the second target and radius and the second 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 first external insulation structure 13 and the second 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 first guide rod 10 and the second guide rod are copper bar.
The silicone rubber jacket layer of described first external insulation structure 13 and the second 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 11, 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.
Also comprise earthmeter terminal 3, described earthmeter terminal 3 is arranged on flange 4, and earthmeter terminal 3 comprises ground connection cap, outer wall, measured hole and experimental jack, and described measured hole and socket are all positioned on outer wall.Within every 3 years, measure capacitance and the dielectric loss value of a sleeve pipe in operation, undertaken by measurement terminal ad hoc on sleeve pipe adpting flange 4 during measurement.
As mentioned above, the utility model can be realized preferably.
Claims (7)
1. a high-voltage wall bushing, is characterized in that, comprises outdoor partly (1), flange (4), current transformer (5) and the indoor part (2) that connect successively;
Described outdoor part (1) comprises insulation system (15) in the first guide rod (10), first, the first external insulation structure (13), the first binding post (12) and the first metal-ware, described first metal-ware is arranged on the first external insulation structure (13), insulation system (15) in first external insulation structure (13) coated first, in first, insulation system (15) is coated with the first guide rod (10), and the first guide rod (10) is connected with the first binding post (12);
In described first, insulation system (15) comprises the first target (17), first grounding electrode (18), two the first stress cones (16) and first ring epoxy layer, first target (17), first grounding electrode (18) and two the first stress cones (16) are all coated in first ring epoxy layer, first stress cone (16) is connected with the first target (17), first grounding electrode (18) is connected with another first stress cone (16), described first target (17) is arranged on the side near the first guide rod (10), first grounding electrode (18) is arranged on the right side of the first target (17),
Described first external insulation structure (13) is silicone rubber jacket layer, silicone rubber jacket layer is provided with the first full skirt (11);
Described first metal-ware comprises the first radome (14), the first metallic sheath, described first radome (14) is arranged on the first binding post (12) and the first guide rod (10) junction and runs through first ring epoxy layer and first external insulation structure (13) of insulation system in first (15), and described first metallic sheath is arranged on the first external insulation structure (13) outside and is connected with flange (4);
Described indoor part (2) comprises insulation system in the second guide rod, second, the second external insulation structure, the second binding post (22) and the second metal-ware, described second metal-ware is arranged on the second external insulation structure, insulation system in second external insulation structure coated second, in second, insulation system is coated with the second guide rod, and the second guide rod is connected with the second binding post (22);
In described second, insulation system comprises the second target, the second grounding electrode, two the second stress cones and the second epoxy resin layer, second target, the second grounding electrode and two the second stress cones are all coated in the second epoxy resin layer, second stress cone is connected with the second target, second grounding electrode is connected with another second stress cone, described second target is arranged on the side near the second guide rod, and the second grounding electrode is arranged on the right side of the second target;
Described second external insulation structure is silicone rubber jacket layer, silicone rubber jacket layer is provided with the second full skirt (21), and the first full skirt (11) shape of described first external insulation structure (13) is larger than the second full skirt (21) shape of the second external insulation structure;
Described second metal-ware comprises secondary shielding cover, the second metallic sheath, described secondary shielding cover is arranged on the second binding post and the second guide rod junction and runs through the second epoxy resin layer and second external insulation structure of insulation system in second, and described second metallic sheath to be arranged on outside the second external insulation structure and to be connected with flange (4);
The central axes of described first guide rod (10) and the second guide rod, in first insulation system (15) central axis and second in the central axes of insulation system, the central axes of the first external insulation structure (13) and the second external insulation structure.
2. high-voltage wall bushing according to claim 1, it is characterized in that, the length of the length of the first target (17) and radius and the first grounding electrode (18) and radius can make the voltage between guide rod with target equal with the voltage between target with grounding electrode.
3. high-voltage wall bushing according to claim 1, it is characterized in that, the length of the length of the second target and radius and the second grounding electrode and radius can make the voltage between guide rod with target equal with the voltage between target with grounding electrode.
4. high-voltage wall bushing according to claim 1, is characterized in that, the length of described first external insulation structure (13) and the second external insulation structure is 15-20cm.
5. high-voltage wall bushing according to claim 1, is characterized in that, described first guide rod (10) and the second guide rod are copper bar.
6. high-voltage wall bushing according to claim 1, is characterized in that, the silicone rubber jacket layer of described first external insulation structure (13) and the second external insulation structure is the rubber through post vulcanization.
7. high-voltage wall bushing according to claim 1, it is characterized in that, also comprise earthmeter terminal (3), described earthmeter terminal (3) is arranged on flange (4), earthmeter terminal (3) comprises ground connection cap, outer wall, measured hole and experimental jack, and described measured hole and socket are all positioned on outer wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420629018.3U CN204167022U (en) | 2014-10-28 | 2014-10-28 | A kind of high-voltage wall bushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420629018.3U CN204167022U (en) | 2014-10-28 | 2014-10-28 | A kind of high-voltage wall bushing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204167022U true CN204167022U (en) | 2015-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420629018.3U Expired - Fee Related CN204167022U (en) | 2014-10-28 | 2014-10-28 | A kind of high-voltage wall bushing |
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| Country | Link |
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| CN (1) | CN204167022U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332258A (en) * | 2014-10-28 | 2015-02-04 | 成都峰达科技有限公司 | Improved high voltage wall bushing |
| CN106300174A (en) * | 2016-01-29 | 2017-01-04 | 四川行之智汇知识产权运营有限公司 | Relay protection type wall bushing |
-
2014
- 2014-10-28 CN CN201420629018.3U patent/CN204167022U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332258A (en) * | 2014-10-28 | 2015-02-04 | 成都峰达科技有限公司 | Improved high voltage wall bushing |
| CN104332258B (en) * | 2014-10-28 | 2016-08-24 | 国网山东省电力公司菏泽供电公司 | The high-voltage wall bushing improved |
| CN106300174A (en) * | 2016-01-29 | 2017-01-04 | 四川行之智汇知识产权运营有限公司 | Relay protection type wall bushing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20150218 Termination date: 20151028 |
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| EXPY | Termination of patent right or utility model |