CN201859756U - Shielding structure of drum-shaped excitation-free tap switch insulating cylinder - Google Patents
Shielding structure of drum-shaped excitation-free tap switch insulating cylinder Download PDFInfo
- Publication number
- CN201859756U CN201859756U CN201020289530XU CN201020289530U CN201859756U CN 201859756 U CN201859756 U CN 201859756U CN 201020289530X U CN201020289530X U CN 201020289530XU CN 201020289530 U CN201020289530 U CN 201020289530U CN 201859756 U CN201859756 U CN 201859756U
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- insulating cylinder
- layer
- metal screen
- metallic shield
- drum type
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Abstract
The utility model discloses a shielding structure of a drum-shaped excitation-free tap switch insulating cylinder, which comprises an insulating cylinder body made of an insulating material. The shielding structure is characterized in that a metal shielding layer is coated on the insulating cylinder body; and the metal shielding layer is electrically connected with a contactor installed on the insulating cylinder body, so as to form potential equation. The shielding structure does not need a metal shielding cylinder, but the metal shielding layer is electroplated or coated on the switch insulating cylinder body through electrostatic spray coating, which is electrically connected with the contactor, so as to form potential equation, the switch insulating cylinder has an electric field shield function, switch electric field is not easy to leak, and the purposes that local discharge of a switch is reduced, the physical dimension of the switch is not increased, and the shielding structure is convenient to install and use on a transformer are achieved.
Description
Technical field:
The utility model relates to the off circuit tap changer field, particularly a kind of shielding construction 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 between the item of drum type off circuit tap changer and switch and transformer housing spacing from all very compact, therefore very high to the partial discharge index request of switch, high-voltage switch often adopts outside switch insulation tube 10 according to the switch item number requirement to install 20 pairs of switch electric fields of 1-3 metallic cylinder additional to shield at present.This measure has strengthened the radial dimension of switch, has increased the manufacturing cost of switch.
The utility model content:
Technical problem to be solved in the utility model is intended to overcome the deficiency of above-mentioned prior art, and the shielding construction of a kind of drum type off circuit tap changer insulating cylinder that proposes needs to install additional many technical problems that metallic cylinder is brought to solve existing drum type off circuit tap changer outside the switch insulation tube.
In order to realize above-mentioned utility model purpose, the technical scheme that the utility model adopted is:
A kind of shielding construction of drum type off circuit tap changer insulating cylinder, comprise an insulation stack shell of making by insulating material, it is characterized in that, be coated with the layer of metal screen on one's body at described insulating cylinder, described metal screen layer is electrically connected with being installed in insulating cylinder contact on one's body, forms equipotential.
The outer circumference surface of described insulation stack shell or inner peripheral surface are coated with the layer of metal screen.
In order further to improve the Electric Field Distribution of the utility model to transformer housing and lead-in wire, at the two ends up and down of described metal screen layer one metallic shield ring is installed, described metallic shield ring is connected with described metal screen layer conduction.
Ring body that described metallic shield ring is made by conductor or made by insulating material and the metallic shield circular layer that is coated in ring body surface constitute, and described metallic shield circular layer is connected with conducting electricity with described metal screen layer.
The utility model also comprises and is coated on the outer circular arc barricade of described metal screen layer, in the surface applied of described circular arc barricade layer of metal shielding flaggy arranged, and described metallic shield flaggy conducts electricity with described metal screen layer and is connected.
Metal screen layer described in the utility model, metallic shield circular layer, metallic shield flaggy adopt to be electroplated or the spraying method coating.
The utility model is electroplated by the position that need shield at the switch insulation tube or spraying coating last layer metal screen layer, be electrically connected with 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 utility model has adopted technique scheme, compared with prior art, has following remarkable advantage:
1, the utility model is only electroplated 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 to install and use on transformer.
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 schematic diagram between the metallic shield tube.
Fig. 2 is the shielding construction schematic diagram of a kind of drum type off circuit tap changer of the utility model insulating cylinder.
Fig. 3 is the shielding construction schematic diagram of a kind of drum type off circuit tap changer of the utility model insulating cylinder.
Fig. 4 is the structural representation of the utility model circular arc barricade.
Embodiment
Following embodiment further describes the utility model, but described embodiment only is used to illustrate the utility model rather than restriction the utility model.
Referring to Fig. 2, the shielding construction of shown a kind of drum type off circuit tap changer insulating cylinder, it adopts and electroplates or spraying method is coated with and applies metal at the outer circumference surface or the inner peripheral surface of insulation on the stack shell 100, form layer of metal screen 200 as copper, chromium, nickel, silver, metal screen layer 200 be installed in the contact of insulation on the stack shell 100 and be electrically connected, form equipotential, just play shielding action internal electric field.
Referring to Fig. 3, the shielding construction of shown a kind of drum type off circuit tap changer insulating cylinder, the shielding construction of its structure and the described insulating cylinder of Fig. 2 is basic identical, just in order further to improve the Electric Field Distribution of the utility model 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 made by conductor, also can be made of insulating material ring body of making 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 metal screen layer 200 are just the same.
Referring to Fig. 4, can also be coated with circular arc barricade 300 outside the metal screen layer 200 in the shielding construction of Fig. 2 and a kind of drum type off circuit tap changer insulating cylinder shown in Figure 3, the surface applied of this circular arc barricade 300 has layer of metal shielding flaggy, and the metallic shield flaggy is connected with metal screen layer 200 conductions.The coating material of metallic shield flaggy and method and metal screen layer 200 are just the same.
More than show and described basic principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; what describe in the foregoing description and the specification is principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in the claimed scope of the present utility model.The protection range that the utility model requires is defined by appending claims and equivalent thereof.
Claims (7)
1. the shielding construction of a drum type off circuit tap changer insulating cylinder, comprise an insulation stack shell of making by insulating material, it is characterized in that, be coated with the layer of metal screen on one's body at described insulating cylinder, described metal screen layer is electrically connected with being installed in insulating cylinder contact on one's body, forms equipotential.
2. the shielding construction of drum type off circuit tap changer insulating cylinder as claimed in claim 1 is characterized in that, is coated with the layer of metal screen at the outer circumference surface or the inner peripheral surface of described insulation stack shell.
3. the shielding construction 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 described metal screen layer one metallic shield ring is installed, and described metallic shield ring is connected with described metal screen layer conduction.
4. the shielding construction of drum type off circuit tap changer insulating cylinder as claimed in claim 3 is characterized in that, described metallic shield ring is made by conductor.
5. the shielding construction of drum type off circuit tap changer insulating cylinder as claimed in claim 1, it is characterized in that, ring body that described metallic shield ring is made by insulating material and the metallic shield circular layer that is coated in ring body surface constitute, and described metallic shield circular layer is connected with conducting electricity with described metal screen layer.
6. as the shielding construction 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 comprise and be coated on the outer circular arc barricade of described metal screen layer, surface applied at described circular arc barricade has layer of metal shielding flaggy, and described metallic shield flaggy is connected with described metal screen layer conduction.
7. the shielding construction of drum type off circuit tap changer insulating cylinder as claimed in claim 6 is characterized in that, described metal screen layer, metallic shield circular layer, metallic shield flaggy adopt to be electroplated or the spraying method coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020289530XU CN201859756U (en) | 2010-08-12 | 2010-08-12 | Shielding structure of drum-shaped excitation-free tap switch insulating cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020289530XU CN201859756U (en) | 2010-08-12 | 2010-08-12 | Shielding structure of drum-shaped excitation-free tap switch insulating cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201859756U true CN201859756U (en) | 2011-06-08 |
Family
ID=44105557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020289530XU Expired - Lifetime CN201859756U (en) | 2010-08-12 | 2010-08-12 | Shielding structure of drum-shaped excitation-free tap switch insulating cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201859756U (en) |
-
2010
- 2010-08-12 CN CN201020289530XU patent/CN201859756U/en not_active Expired - Lifetime
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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 |
Granted publication date: 20110608 |
|
| CX01 | Expiry of patent term |