CN202019192U - Combined device with grounded middle point - Google Patents
Combined device with grounded middle point Download PDFInfo
- Publication number
- CN202019192U CN202019192U CN2011200935241U CN201120093524U CN202019192U CN 202019192 U CN202019192 U CN 202019192U CN 2011200935241 U CN2011200935241 U CN 2011200935241U CN 201120093524 U CN201120093524 U CN 201120093524U CN 202019192 U CN202019192 U CN 202019192U
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- insulator
- electrode
- grounding electrode
- combined device
- hood body
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Abstract
A combined device with a grounded middle point comprises an integral hood body, an insulator and a mounting base. A protecting hood and an upper flange are connected to form the integral hood body, an observation window is arranged on the hood body, a gap adjusting device is disposed in an inner cavity of the hood body, the insulator is positioned in the middle of the combined device, a discharge electrode and a grounding electrode are vertically oppositely disposed in an inner cavity of the insulator to form a discharge gap, a rod of the discharge electrode hermetically penetrates through a through hole of the top wall of the insulator to enter the lower portion of the inner cavity of the hood body, and the lower end of the grounding electrode hermetically penetrates through a through hole of the bottom wall of the insulator to enter a cavity of the mounting base. An adjusting screw is separated from the discharge electrode, the combined device is additionally provided with a graduated plate, the insulator is designed into a double-layer split structure, and insulating sleeves are sleeved on the rod of the discharge electrode and a rod of the grounding electrode, and accordingly the combined device has the advantages of convenience in observation, adjustment and detachment, high adjustment precision of the discharge gap, fine insulation performance and reliable electrical performances, and is simple in improvement and remarkable in effect.
Description
[technical field]
The utility model belongs to a kind of neutral ground unit equipment.
[background technology]
The neutral ground unit equipment is exclusively used in 110kV and above power transformer neutral point, to realize the operation of transformer neutral point ground connection or two kinds of different operational modes of earth-free operation, avoid owing to the system failure, the rising of initiation transformer neutral point voltage causes the infringement to transformer.The structure of this neutral ground unit equipment is made of adjusting nut, electrode, insulator and mounting seat usually, and last lower flange is connected into integral body with electrode, insulator and mounting seat successively.Insulator is located at above-mentioned three's middle part, and its inside is the chamber of a sealing, and sparking electrode and grounding electrode be respectively from the stretching into up and down of insulator, and forms discharging gap.The adjusting nut that is arranged on the electrode afterbody can be regulated gap between sparking electrode and the grounding electrode as requested.There are the following problems in actual applications for the neutral ground unit equipment of prior art: discharging gap is difficult for observing; Rely on range estimation or measuring and adjusting discharging gap, regulate loaded down with trivial detailsly, be difficult to reach degree of regulation; The electrode dismounting is difficult, and the efficient that wastes time and energy is low; Low and the electric property instability of apparatus insulated performance.
[summary of the invention]
The utility model solves the problems of the technologies described above and provides a kind of neutral ground unit equipment, this equipment have electrode convenient disassembly, discharging gap be easy to observe, easy to adjust, and the accuracy height, apparatus insulated performance is good and the reliable advantage of electric property.
The scheme that solves the problems of the technologies described above is: this neutral ground unit equipment comprises by upper flange, lower flange being connected into whole cover body, insulator and mounting seat; Described cover body is provided with protective cover, observation window, is provided with slack adjuster in the inner chamber of this cover body; In the inner chamber of described insulator vertically to being provided with sparking electrode, grounding electrode relatively; The shaft sealing shape of described sparking electrode passes the roof through hole of insulator, enter the inner chamber bottom of cover body, the lower end sealing shape of described grounding electrode passes the diapire through hole of insulator, enter in the chamber of mounting seat (6), it is characterized in that: the adjusting screw(rod) of described slack adjuster and sparking electrode are the split part, and both are that detachable is fixedly connected.
During concrete enforcement, in described observation window, the back of slack adjuster is provided with a scale plate.
During concrete enforcement, described insulator is a hollow compound structural, insulator internal layer and the outer split with full skirt.
During concrete enforcement, on the shaft of sparking electrode and grounding electrode, be with insulating case respectively.
Beneficial effect: compared with prior art, because adjusting screw(rod) and sparking electrode in the slack adjuster are the split part, both are that detachable is fixedly connected, therefore make the maintenance of sparking electrode, replacing become very convenient.Moreover, insulator is designed to double-deck branch body structure, and behind sheathed insulating case on the shaft of sparking electrode and grounding electrode, has improved the insulation property of equipment and the reliability of electric property.After scale plate was set, the lifting distance of adjusting screw(rod) can be observed the distance in internal discharge gap very intuitively, and regulates according to the scale show value, and precision is greatly improved.
[description of drawings]
Fig. 1 is the longitudinal profile structural representation of an embodiment of the utility model.
Fig. 2 is the plan structure schematic diagram of Fig. 1.
Fig. 3 is the amplification assumption diagram of " A " portion among Fig. 1.
Fig. 4 is the amplification assumption diagram of " B " portion among Fig. 1.
Among the figure: protective cover 1, observation window 2, upper flange 3, insulator 4, lower flange 5, mounting seat 6, scale plate 7, slack adjuster 8, sparking electrode 9, discharging gap 10, grounding electrode 11, current transformer 12, end of incoming cables daughter board 13, insulating case 91, insulating case 111.
[embodiment]
Referring to Fig. 1, and in conjunction with Fig. 2.From top to bottom, cover body 1a, insulator 4 and mounting seat 6 are connected into integral body by upper flange 3, lower flange 5.The top of cover body 1a is provided with protective cover 1, and ring wall is provided with observation window 2.Insulator 4 is positioned at the middle part, and sparking electrode 9, grounding electrode 11 vertically are oppositely arranged in the inner chamber, forms discharging gap 10.The shaft sealing shape of sparking electrode 9 passes the roof through hole of insulator 4, enters cover body 1a bottom.The lower end sealing shape of grounding electrode 11 passes the diapire through hole of insulator 4, enters in the chamber of mounting seat 6, and grounding electrode 11 enters from the P1 end of current transformer 12, and P2 terminates on the mounting seat 6 of ground connection, constitutes grounded circuit.
Enter the shaft end of the sparking electrode 9 of cover body 1a inner chamber bottom, be connected with the adjusting screw(rod) lower end of slack adjuster 8 through latch, rotating adjusting screw(rod) is the size of scalable discharging gap 10.
The application's innovative point is the following aspects: 1, because the top of sparking electrode 9 is that latch is connected with the lower end of adjusting screw(rod), make that changing sparking electrode 9 becomes very convenient, having overcome original sparking electrode 9 and adjusting screw(rod) is unitarily formed defective.2, in observation window 2, on the track of adjusting screw(rod) lifting (being the back of slack adjuster 8), a scale plate 7 is set, therefore, the magnitude numerical value of discharging gap 10 can show (in conjunction with Fig. 3) behind the turn adjusting screw(rod) on scale plate 7, helps observing and improving degree of regulation.3, in conjunction with Fig. 4, insulator 4 is a hollow compound structural, and therefore internal layer and the outer split with full skirt, have the good insulation performance.4, behind sheathed insulating case 91, insulating case 111 on the shaft of sparking electrode 9 and grounding electrode 11, also improved the reliability of insulation property and electric property.
During work; when system when the neutral point of 110kV-220kV transformer has overvoltage to produce; and when this superpotential amplitude reaches the discharge voltage value in gap; discharge by the discharging gap 10 between sparking electrode 9 and the grounding electrode 11; electrical discharge arc is with transformer neutral point ground connection; make the neutral point of local earth-free 110kV-220kV transformer change effectively earthed system into by arcing ground; drop to the discharge voltage value in gap when following in superpotential amplitude; electric arc can be from horizontal blanking; current transformer exports the current value of measuring to protective relaying device, thereby realizes the superpotential automatic protection of transformer neutral point.
Claims (4)
1. a neutral ground unit equipment comprises by upper flange (3), lower flange (5) being connected into whole cover body (1a), insulator (4) and mounting seat (6); Described cover body (1a) is provided with protective cover (1), observation window (2), is provided with slack adjuster (8) in the inner chamber of this cover body (1a); In the inner chamber of described insulator (4) vertically to being provided with sparking electrode (9), grounding electrode (11) relatively; The shaft sealing shape of described sparking electrode (9) passes the roof through hole of insulator (4), enter the inner chamber bottom of cover body (1a), the lower end sealing shape of described grounding electrode (11) passes the diapire through hole of insulator (4), enter in the chamber of mounting seat (6), it is characterized in that: the adjusting screw(rod) of described slack adjuster (8) and sparking electrode (9) are the split part, and both are that detachable is fixedly connected.
2. as claim 1 neutral ground unit equipment, it is characterized in that: in described observation window (2), the back of slack adjuster (8) is provided with a scale plate (7).
3. as claim 1 neutral ground unit equipment, it is characterized in that: described insulator (4) is a hollow compound structural, insulator (4) internal layer and the outer split with full skirt.
4. as claim 1 neutral ground unit equipment, it is characterized in that: on the shaft of sparking electrode (9) and grounding electrode (11), be with insulating case (91,111) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200935241U CN202019192U (en) | 2011-04-01 | 2011-04-01 | Combined device with grounded middle point |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200935241U CN202019192U (en) | 2011-04-01 | 2011-04-01 | Combined device with grounded middle point |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202019192U true CN202019192U (en) | 2011-10-26 |
Family
ID=44812859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200935241U Expired - Fee Related CN202019192U (en) | 2011-04-01 | 2011-04-01 | Combined device with grounded middle point |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202019192U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107527695A (en) * | 2017-08-26 | 2017-12-29 | 毛金霞 | A kind of insulator for overhead transmission line |
| CN107564632A (en) * | 2017-08-26 | 2018-01-09 | 毛金霞 | A kind of anti-thunder insulator |
| CN107564633A (en) * | 2017-08-26 | 2018-01-09 | 毛金霞 | A kind of high-tension insulator of the insulated overhead line with electrical verification rod |
| CN107564636A (en) * | 2017-08-26 | 2018-01-09 | 毛金霞 | A kind of anti-thunder insulator for insulated overhead line |
| CN107564637A (en) * | 2017-08-26 | 2018-01-09 | 毛金霞 | A kind of overhead transmission line insulator |
| CN109037000A (en) * | 2018-09-07 | 2018-12-18 | 佛山齐安建筑科技有限公司 | A kind of novel limiting fuse porcelain knob structure |
| CN112014728A (en) * | 2020-08-10 | 2020-12-01 | 西安交通大学 | Switching apparatus electric arc experimental apparatus based on pneumatic actuator |
-
2011
- 2011-04-01 CN CN2011200935241U patent/CN202019192U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107527695A (en) * | 2017-08-26 | 2017-12-29 | 毛金霞 | A kind of insulator for overhead transmission line |
| CN107564632A (en) * | 2017-08-26 | 2018-01-09 | 毛金霞 | A kind of anti-thunder insulator |
| CN107564633A (en) * | 2017-08-26 | 2018-01-09 | 毛金霞 | A kind of high-tension insulator of the insulated overhead line with electrical verification rod |
| CN107564636A (en) * | 2017-08-26 | 2018-01-09 | 毛金霞 | A kind of anti-thunder insulator for insulated overhead line |
| CN107564637A (en) * | 2017-08-26 | 2018-01-09 | 毛金霞 | A kind of overhead transmission line insulator |
| CN109037000A (en) * | 2018-09-07 | 2018-12-18 | 佛山齐安建筑科技有限公司 | A kind of novel limiting fuse porcelain knob structure |
| CN112014728A (en) * | 2020-08-10 | 2020-12-01 | 西安交通大学 | Switching apparatus electric arc experimental apparatus based on pneumatic actuator |
| CN112014728B (en) * | 2020-08-10 | 2022-04-01 | 西安交通大学 | Switching apparatus electric arc experimental apparatus based on pneumatic actuator |
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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: 20111026 Termination date: 20150401 |
|
| EXPY | Termination of patent right or utility model |