CN208623280U - 35kV switchgear bus casing - Google Patents
35kV switchgear bus casing Download PDFInfo
- Publication number
- CN208623280U CN208623280U CN201821437712.XU CN201821437712U CN208623280U CN 208623280 U CN208623280 U CN 208623280U CN 201821437712 U CN201821437712 U CN 201821437712U CN 208623280 U CN208623280 U CN 208623280U
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- CN
- China
- Prior art keywords
- main body
- flange
- shielding layer
- casing
- external shielding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of 35kV switchgear bus casing, including casing main body, casing main body is disposed with overskirt edge, flange sleeve, skirt edge from top to bottom；Flange sleeve is set to the middle part of casing main body；Flange sleeve includes flange, and the metal fixing being connected with switch board housing is provided on flange；The body interior of casing main body is provided with external shielding layer, and external shielding layer is curved to the inside, and external shielding layer is connected with metal fixing；Internal shield is correspondingly arranged on the inside of external shielding layer, internal shield is set on the inner wall of casing main body；The utility model uses double-layer shielding structure, structurally reasonable, eliminates the problems in bus casing internal electric field collection, has reached the equally distributed effect of bus casing internal electric field；Insulating layer in thickening between external shielding layer improves safety, the reliability of bus casing so that the partial discharge quantity of bus casing is substantially reduced and controls in the range of being less than or equal to 3pC.
Description
Technical field
The utility model relates to a kind of bus casing more particularly to a kind of 35kV switchgear bus casings.
Background technique
Switchgear is a kind of electrical equipment, be mainly used for power plant, power transformation in one's power the electric system such as industrial and mining enterprises receive and
It distributes electric energy and control, protection and monitoring is carried out to circuit.Current switchgear bus casing existing on the market is in test electricity
When pressure is 30~350,000 volts, partial discharge quantity is not more than 3pC；When test voltage is promoted to ten thousand volts of 40.5 × 1.1 (about 44.55)
When, the partial discharge quantity of existing bus casing is greater than 3pC on the market, and safety is low, poor reliability.
Utility model content
In order to solve shortcoming present in above-mentioned technology, the utility model provides a kind of 35kV switchgear bus
Casing.
In order to solve the above technical problems, the technical solution adopted in the utility model is: a kind of 35kV switchgear bus
Casing, including casing main body, casing main body are disposed with overskirt edge, flange sleeve, skirt edge from top to bottom；Flange sleeve
Pipe is set to the middle part of casing main body；Flange sleeve includes flange, and flange is set to the lower part of flange sleeve；It is provided on flange
The metal fixing being connected with switch board housing；The body interior of casing main body is provided with external shielding layer, and external shielding layer is inside
Lateral bend, external shielding layer are connected with metal fixing；Internal shield is correspondingly arranged on the inside of external shielding layer, internal shield is set
It is placed on the inner wall of casing main body；Internal shield is connected by internal shield connecting line with bus bar with bolt.
Creepage distance between flange upper end and overskirt edge lower end is greater than between flange lower end and skirt edge upper end
Creepage distance.
The distance between internal shield of external shielding layer and corresponding position is not less than 75 millimeters.
The wall thickness of casing main body is not less than 10 millimeters.
External shielding layer is electroconductive nylon circle, offers equally distributed circular hole on electroconductive nylon circle；Internal shield is conduction
Nylon ring offers equally distributed circular hole on electroconductive nylon circle.
Connecting hole is offered on metal fixing, connecting hole is multiple；Bolt in connecting hole by casing main body and switchs
Cabinet cage connection is together.
The utility model uses double-layer shielding structure, structurally reasonable, eliminates the problems in bus casing internal electric field collection,
The equally distributed effect of bus casing internal electric field is reached；Insulating layer in thickening between external shielding layer, so that bus casing
Partial discharge quantity be substantially reduced and control and improve the safety, reliable of bus casing in the range of being less than or equal to 3pC
Property.
Detailed description of the invention
Fig. 1 is the integrally-built diagrammatic cross-section of the utility model.
Fig. 2 is the top view of the utility model.
In figure: 1, casing main body；2, overskirt edge；3, skirt edge；4, flange；5, external shielding layer；6, internal shield；7,
Internal shield connecting line.
Specific embodiment
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.
As shown in Figure 1, a kind of 35kV switchgear bus casing, including casing main body 1, casing main body 1 from top to bottom according to
It is secondary to be provided with overskirt edge 2, flange sleeve, skirt edge 3；Flange sleeve is set to the middle part of casing main body 1；Flange sleeve packet
Flange 4 is included, flange 4 is set to the lower part of flange sleeve；The metal being connected with switch board housing is provided on flange 4 to fix
Part, connecting hole is offered on metal fixing, and connecting hole is multiple；Bolt in connecting hole will be outside casing main body 1 and switchgear
Shell links together.The body interior of casing main body 1 is provided with external shielding layer 5, and external shielding layer 5 is curved to the inside, external shielding layer 5
It is connected with metal fixing；The inside of external shielding layer 5 is correspondingly arranged on internal shield 6, and internal shield 6 is set to casing main body
On 1 inner wall.External shielding layer 5 is connected by metal fixing with switch board housing, and then is connected to ground；In use, interior screen
It covers layer 6 to be connected by internal shield connecting line 7 with bus bar with bolt, realizes the connection with high-voltage end.
The wall thickness of casing main body 1 is not less than 10 millimeters, guarantees that the anti-breakdown voltage of bus casing reaches 100,000 volts, safety
It can be higher.
Creepage distance between 2 lower end of 4 upper end of flange and overskirt edge be greater than 4 lower end of flange and 3 upper end of skirt edge it
Between creepage distance, reduce the partial discharge quantity of bus casing.
The distance between internal shield of external shielding layer and corresponding position is not less than 75 millimeters, passes through external shielding layer in increasing
Between thickness of insulating layer realize reduce bus casing partial discharge quantity.
External shielding layer 5 is electroconductive nylon circle, offers equally distributed circular hole on electroconductive nylon circle；Internal shield 6 is to lead
Electric nylon ring offers equally distributed circular hole on electroconductive nylon circle, eliminates the problems in bus casing internal electric field collection, reach
The equally distributed effect of bus casing internal electric field is arrived.The internal shield of existing bus casing is all using metal in the market
Net, the disadvantage is that the both ends wedge angle of metal mesh can have electric discharge phenomena；And the internal shield 6 of the utility model is electroconductive nylon
Circle, without any wedge angle, substantially increases the safety and reliability of bus casing.
For the utility model when carrying out partial discharge test, test voltage also can control bus sheath when being more than or equal to 450,000 volts
The partial discharge quantity of pipe is not more than 3pC, and reliability is higher.
The utility model compared with prior art, has the advantage that
1) thickness of insulating layer between external shielding layer and internal shield is increased, the shelf depreciation of bus casing is reduced
Amount；
2) increase the creepage distance between flange upper end and overskirt edge lower end, reduce the shelf depreciation of bus casing
Amount；
3) inside and outside shielded layer is electroconductive nylon circle, eliminates the problems in bus casing internal electric field collection, has reached bus
The effect of inside pipe casing electric fields uniform distribution；
4) internal shield is electroconductive nylon circle, and without any wedge angle, there is no the electric discharge phenomena of sharp corner, improve bus sheath
The safety of pipe, reliability.
Above embodiment is not limitations of the present invention, and the utility model is also not limited to the example above,
The variations, modifications, additions or substitutions that those skilled in the art are made within the scope of the technical solution of the utility model,
Also the protection scope of the utility model is belonged to.
Claims (6)
1. a kind of 35kV switchgear bus casing, including casing main body (1), it is characterised in that: described sleeve pipe main body (1) is from upper
Overskirt edge (2), flange sleeve, skirt edge (3) are disposed under；The flange sleeve is set to casing main body (1)
Middle part；The flange sleeve includes flange (4), and flange (4) is set to the lower part of flange sleeve；It is arranged on the flange (4)
There is the metal fixing being connected with switch board housing；The body interior of described sleeve pipe main body (1) is provided with external shielding layer (5),
External shielding layer (5) is curved to the inside, and external shielding layer (5) is connected with metal fixing；The inside of the external shielding layer (5) is corresponding
It is provided with internal shield (6), internal shield (6) is set on the inner wall of casing main body (1)；The internal shield (6) passes through interior
Shielded layer connecting line (7) is connected with bus bar with bolt.
2. 35kV switchgear bus casing according to claim 1, it is characterised in that: flange (4) upper end with it is upper
Creepage distance between skirt portion (2) lower end is greater than the creepage distance between flange (4) lower end and skirt edge (3) upper end.
3. 35kV switchgear bus casing according to claim 1, it is characterised in that: the external shielding layer and corresponding position
The distance between internal shield set is not less than 75 millimeters.
4. 35kV switchgear bus casing according to claim 1, it is characterised in that: the wall of described sleeve pipe main body (1)
Thickness is not less than 10 millimeters.
5. 35kV switchgear bus casing according to claim 1, it is characterised in that: the external shielding layer (5) is to lead
Electric nylon ring offers equally distributed circular hole on electroconductive nylon circle；The internal shield (6) is electroconductive nylon circle, conductive Buddhist nun
Equally distributed circular hole is offered on Long Quan.
6. 35kV switchgear bus casing according to claim 1, it is characterised in that: opened up on the metal fixing
There is connecting hole, connecting hole is multiple；Bolt in connecting hole links together casing main body (1) with switch board housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821437712.XU CN208623280U (en) | 2018-09-03 | 2018-09-03 | 35kV switchgear bus casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821437712.XU CN208623280U (en) | 2018-09-03 | 2018-09-03 | 35kV switchgear bus casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208623280U true CN208623280U (en) | 2019-03-19 |
Family
ID=65717017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821437712.XU Expired - Fee Related CN208623280U (en) | 2018-09-03 | 2018-09-03 | 35kV switchgear bus casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208623280U (en) |
-
2018
- 2018-09-03 CN CN201821437712.XU patent/CN208623280U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190319 Termination date: 20190903 |