CN102376419A - Insulating cylinder shielding method of drum type excitation-free tapping switch - Google Patents
Insulating cylinder shielding method of drum type excitation-free tapping switch Download PDFInfo
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- CN102376419A CN102376419A CN2010102516774A CN201010251677A CN102376419A CN 102376419 A CN102376419 A CN 102376419A CN 2010102516774 A CN2010102516774 A CN 2010102516774A CN 201010251677 A CN201010251677 A CN 201010251677A CN 102376419 A CN102376419 A CN 102376419A
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- insulating cylinder
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- drum type
- switch
- metal screen
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Abstract
The invention discloses an insulating cylinder shielding method of a drum type excitation-free tapping switch. An insulating cylinder body made from insulating materials is provided, a metallic shielding layer is coated at the part needing to be shielded on the insulating cylinder body, and the metallic shielding layer is electrically connected with some contacts installed on the insulating cylinder body to form equal potential. In the invention, a metallic shielding cylinder is not needed, and the metallic shielding layer is plated or spray-coated at the part needing to be shielded on the switch insulating cylinder and is electrically connected with some contacts to achieve equal potential so as to enable the switch insulating cylinder to have an electric field shielding function, thus a switch electric field is not easy to leak, the purposes of reducing the local discharge of the switch and not increasing the overall dimension of the switch are achieved, and the switch is convenient to install and use on a transformer.
Description
Technical field:
The present invention relates to the off circuit tap changer field, particularly a kind of screen method of drum type off circuit tap changer insulating cylinder.
Background technology:
Referring to Fig. 1, the drum type off circuit tap changer is owing to the restriction of radial dimension, and Switch main body and wiring pile crown are installed in 1 insulating cylinder 10 cylindraceous, and profile looks and looks like 1 microscler drum, so name drum type off circuit tap changer.
Because it is very compact from all between the item of drum type off circuit tap changer with switch and transformer housing spacing; Therefore very high to the partial discharge index request of switch, at present high-voltage switch often be employed in switch insulation tube 10 outer according to the switch item number requirement install 20 pairs of switch electric fields of 1-3 metallic cylinder additional and shield.This measure has strengthened the radial dimension of switch, has increased the manufacturing cost of switch.
Summary of the invention:
Technical problem to be solved by this invention is intended to overcome the deficiency of above-mentioned prior art; And the screen method of a kind of drum type off circuit tap changer insulating cylinder that proposes need install many technical problems that metallic cylinder is brought additional to solve existing drum type off circuit tap changer outside the switch insulation tube.
In order to realize the foregoing invention purpose, the technical scheme that the present invention adopted is:
A kind of screen method of drum type off circuit tap changer insulating cylinder; Comprise the insulation stack shell processed by insulating material; It is characterized in that; Be coated with layer of metal screen at the position that said insulating cylinder need shield on one's body, said metal screen layer is electrically connected with being installed in insulating cylinder some contact on one's body, forms equipotential.
The position that said insulating cylinder need shield on one's body is the outer circumference surface or the inner peripheral surface of insulation stack shell.
In order further to improve the Electric Field Distribution of the present invention to transformer housing and lead-in wire, at the two ends up and down of said metal screen layer one metallic shield ring is installed, said metallic shield ring is connected with said metal screen layer conduction.
The ring body that said metallic shield ring is processed by conductor or processed by insulating material constitutes with the metallic shield circular layer that is coated in ring body surface, and said metallic shield circular layer is connected with conducting electricity with said metal screen layer.
Method of the present invention also is included in said metal screen layer and coats the circular arc barricade outward; Surfaces coated at said circular arc barricade is covered with the layer of metal screen, and the metal screen layer of said circular arc barricade is connected with the metal screen layer of said insulating cylinder conduction.
Metal screen layer of the present invention, metallic shield circular layer, metallic shield flaggy adopt to be electroplated or the spraying method coating.
The present invention electroplates through the position that need shield at the switch insulation tube or spraying applies the last layer metal screen layer; Be electrically connected with some contact, reach equipotential, make the switch insulation tube self have the electric field shielding function; Thereby make the switch electric field be difficult for leaking, reach the purpose that reduces the switch partial discharge.
Because the present invention has adopted technique scheme, compared with prior art, has following remarkable advantage:
1, the present invention only electroplates at the position that the switch insulation tube need shield or spraying last layer metal screen layer, and technology is grasped well, and cost is low.
2, the metal screen layer in plating or the spraying is very thin, no longer needs existing metallic cylinder, does not therefore increase the overall dimension of switch, is convenient on transformer, install and use.
3, construction of switch is succinct, reduces failure rate.
Description of drawings:
Fig. 1 is the switch insulation tube of existing drum type off circuit tap changer and the mounting structure sketch map between the metallic shield tube.
Fig. 2 is the structural representation of a kind of drum type off circuit tap changer of the present invention insulating cylinder shielding.
Fig. 3 is the another kind of structural representation of drum type off circuit tap changer insulating cylinder shielding of the present invention.
Fig. 4 is the sketch map of the structure of circular arc barricade of the present invention.
Embodiment
Following embodiment further describes the present invention, but said embodiment only is used to explain the present invention rather than restriction the present invention.
A kind of screen method of drum type off circuit tap changer insulating cylinder as shown in Figure 2; It needs the position (outer circumference surface or inner peripheral surface) of shielding to adopt plating or spraying method to apply the last layer metal on insulation stack shell 100; Form layer of metal screen 200 like copper, chromium, nickel, silver; Metal screen layer 200 is electrically connected with being installed in insulation some contact on the stack shell 100, and the formation equipotential just plays the shielding action to internal electric field.
A kind of screen method of drum type off circuit tap changer insulating cylinder as shown in Figure 3; The screen method of itself and insulating cylinder shown in Figure 2 is basic identical; Just in order further to improve the Electric Field Distribution of the present invention to transformer housing and lead-in wire; One metallic shield ring 210,220 is installed at the two ends up and down of metal screen layer 200, and metallic shield ring 210,220 is connected with metal screen layer 200 conductions.Metallic shield ring 210,220 can directly be processed by conductor, also can be made up of insulating material ring body of processing and the metallic shield circular layer that is coated in ring body surface, and the metallic shield circular layer is connected with metal screen layer 200 conductions.The coating material of metallic shield circular layer and method and insulating cylinder metal screen layer 200 are just the same.
Referring to Fig. 4; Outside the shielded metal layer 200 of Fig. 2 and drum type off circuit tap changer insulating cylinder shown in Figure 3, can also be coated with circular arc barricade 300; The surfaces coated of this circular arc barricade 300 is covered with the layer of metal screen, and circular arc barricade metal level is connected with insulating cylinder metal screen layer 200 conductions.The coating material of circular arc shielded metal layer and method and insulating cylinder metal screen layer 200 are just the same.
More than show and described basic principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; The present invention is not restricted to the described embodiments; What describe in the foregoing description and the specification is principle of the present invention; The present invention also has various changes and modifications under the prerequisite that does not break away from spirit and scope of the invention, and these variations and improvement all fall in the scope of the present invention that requires protection.The protection range that the present invention requires is defined by appending claims and equivalent thereof.
Claims (7)
1. the insulating cylinder screen method of a drum type off circuit tap changer; Comprise the insulation stack shell processed by insulating material; It is characterized in that; Be coated with layer of metal screen at the position that said insulating cylinder need shield on one's body, said metal screen layer is electrically connected with being installed in insulating cylinder some contact on one's body, forms equipotential.
2. the screen method of a kind of drum type off circuit tap changer insulating cylinder as claimed in claim 1 is characterized in that, the position that said insulating cylinder need shield on one's body is the outer circumference surface or the inner peripheral surface of insulation stack shell.
3. the screen method of a kind of drum type off circuit tap changer insulating cylinder as claimed in claim 1 is characterized in that, at the two ends up and down of said metal screen layer one metallic shield ring is installed, and said metallic shield ring is connected with said metal screen layer conduction.
4. the screen method of a kind of drum type off circuit tap changer insulating cylinder as claimed in claim 3 is characterized in that, said metallic shield ring is processed by conductor.
5. the screen method of a kind of drum type off circuit tap changer insulating cylinder as claimed in claim 1; It is characterized in that; Said metallic shield ring is made up of insulating material ring body of processing and the metallic shield circular layer that is coated in ring body surface, and said metallic shield circular layer is connected with said insulating cylinder metal screen layer conduction.
6. like the screen method of the described drum type off circuit tap changer of each claim of claim 1 to 5 insulating cylinder; It is characterized in that; Also be included in said insulating cylinder metal screen layer and coat one deck circular arc barricade outward; Surfaces coated at said circular arc barricade is covered with the layer of metal screen, and said metal screen layer is connected with the metal screen layer conduction of said insulating cylinder.
7. the screen method of drum type off circuit tap changer insulating cylinder as claimed in claim 6 is characterized in that, described insulating cylinder metal screen layer, shielded metal circular layer, circular arc sheetmetal screen adopt to be electroplated or the spraying method coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102516774A CN102376419A (en) | 2010-08-12 | 2010-08-12 | Insulating cylinder shielding method of drum type excitation-free tapping switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102516774A CN102376419A (en) | 2010-08-12 | 2010-08-12 | Insulating cylinder shielding method of drum type excitation-free tapping switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102376419A true CN102376419A (en) | 2012-03-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102516774A Pending CN102376419A (en) | 2010-08-12 | 2010-08-12 | Insulating cylinder shielding method of drum type excitation-free tapping switch |
Country Status (1)
| Country | Link |
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| CN (1) | CN102376419A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017144241A1 (en) * | 2016-02-26 | 2017-08-31 | Siemens Aktiengesellschaft | Arrangement for electrostatically shielding an electric system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61109411A (en) * | 1984-11-01 | 1986-05-27 | 三菱電機株式会社 | Gas insulated electrical device |
| JPH02303311A (en) * | 1989-05-15 | 1990-12-17 | Mitsubishi Electric Corp | Molded insulator |
| CN1320941A (en) * | 2000-04-24 | 2001-11-07 | 三菱电机株式会社 | Vacuum insulation switchgear and making method thereof |
-
2010
- 2010-08-12 CN CN2010102516774A patent/CN102376419A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61109411A (en) * | 1984-11-01 | 1986-05-27 | 三菱電機株式会社 | Gas insulated electrical device |
| JPH02303311A (en) * | 1989-05-15 | 1990-12-17 | Mitsubishi Electric Corp | Molded insulator |
| CN1320941A (en) * | 2000-04-24 | 2001-11-07 | 三菱电机株式会社 | Vacuum insulation switchgear and making method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017144241A1 (en) * | 2016-02-26 | 2017-08-31 | Siemens Aktiengesellschaft | Arrangement for electrostatically shielding an electric system |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120314 |
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| WD01 | Invention patent application deemed withdrawn after publication |