CN204167834U - A kind of outdoor part of high-voltage wall bushing - Google Patents
A kind of outdoor part of high-voltage wall bushing Download PDFInfo
- Publication number
- CN204167834U CN204167834U CN201420629019.8U CN201420629019U CN204167834U CN 204167834 U CN204167834 U CN 204167834U CN 201420629019 U CN201420629019 U CN 201420629019U CN 204167834 U CN204167834 U CN 204167834U
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- target
- voltage
- guide rod
- grounding electrode
- insulation structure
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Abstract
The utility model discloses a kind of outdoor part of high-voltage wall bushing, the outdoor part of this kind of high-voltage wall bushing, by arranging target and grounding electrode and stress cone, can be improved 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 outdoor part 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 outdoor part of high-voltage wall bushing, the outdoor part of this kind of a kind of high-voltage wall bushing 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 technical scheme in the invention for solving the above technical problem is:
A kind of outdoor part of high-voltage wall bushing, 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 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 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 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.
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 utility model do, but execution mode of the present utility model is not limited thereto.
Embodiment 1
As shown in Figure 1, a kind of outdoor part of high-voltage wall bushing, 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 utility model: 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 utility model can be realized preferably.
Claims (5)
1. the outdoor part of a high-voltage wall bushing, 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 a kind of high-voltage wall bushing 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 a kind of high-voltage wall bushing according to claim 1, is characterized in that, the length of described external insulation structure is 15-20cm.
4. the outdoor part of a kind of high-voltage wall bushing according to claim 1, is characterized in that, described guide rod (1) is copper bar.
5. the outdoor part of a kind of high-voltage wall bushing 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 |
|---|---|---|---|
| CN201420629019.8U CN204167834U (en) | 2014-10-28 | 2014-10-28 | A kind of outdoor part of high-voltage wall bushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420629019.8U CN204167834U (en) | 2014-10-28 | 2014-10-28 | A kind of outdoor part of high-voltage wall bushing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204167834U true CN204167834U (en) | 2015-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420629019.8U Expired - Fee Related CN204167834U (en) | 2014-10-28 | 2014-10-28 | A kind of outdoor part of high-voltage wall bushing |
Country Status (1)
| Country | Link |
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| CN (1) | CN204167834U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300465A (en) * | 2014-10-28 | 2015-01-21 | 成都峰达科技有限公司 | Outdoor part of high-pressure wall bushing with electric field distribution balancing function |
-
2014
- 2014-10-28 CN CN201420629019.8U patent/CN204167834U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300465A (en) * | 2014-10-28 | 2015-01-21 | 成都峰达科技有限公司 | Outdoor part of high-pressure wall bushing with electric field distribution balancing function |
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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 |
|
| EXPY | Termination of patent right or utility model |