CN109638701B - Switch cabinet - Google Patents
Switch cabinet Download PDFInfo
- Publication number
- CN109638701B CN109638701B CN201811369411.2A CN201811369411A CN109638701B CN 109638701 B CN109638701 B CN 109638701B CN 201811369411 A CN201811369411 A CN 201811369411A CN 109638701 B CN109638701 B CN 109638701B
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- CN
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- Prior art keywords
- insulator
- insulating gas
- ring
- cabinet
- voltage
- 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.)
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- 239000012212 insulator Substances 0.000 claims abstract description 35
- 230000007613 environmental effect Effects 0.000 claims abstract description 18
- 239000007789 gas Substances 0.000 claims description 69
- 238000009413 insulation Methods 0.000 claims description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 2
- 230000005684 electric field Effects 0.000 abstract description 36
- 238000000926 separation method Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/025—Safety arrangements, e.g. in case of excessive pressure or fire due to electrical defect
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/055—Features relating to the gas
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The invention relates to the field of power equipment, in particular to a switch cabinet. The cubical switchboard includes the cabinet body and installs the internal electric parts at the cabinet, and the internal environmental protection insulating gas that has of cabinet, electric parts include insulator and the high-voltage charging spare of fixed mounting on the insulator, and the hookup location of insulator and high-voltage charging spare still is fixed with the insulator separation in the cubical switchboard, with high-voltage charging spare electric connection's equalizer ring, and the equalizer ring shelters from the position department that intersects at insulator, high-voltage charging spare and environmental protection insulating gas. The equalizer ring and the high-voltage electrified piece electric connection, so the two have equal electric potential, shelter from the equalizer ring in insulator, high-voltage electrified piece and environmental protection insulating gas's intersection position department, can utilize the equalizer ring to shield the electric field distortion of falling high-voltage electrified piece and insulator hookup location department, even this department electric field makes the whole insulating properties of cubical switchboard obtain improving.
Description
Technical Field
The invention relates to the field of power equipment, in particular to a switch cabinet.
Background
The existing gas insulated switch cabinet mainly adopts SF6Gas due to SF6Gas can damage the environment, and therefore, environment-friendly gas insulated switchgear has become a future development trend. The switch cabinet is internally provided with insulating parts such as a sleeve, a solid-sealed polar pole, an insulator and the like, and all the insulating parts form an indispensable part of the high-voltage switch cabinet. Because the environment-friendly gas insulated switchgear uses the insulating gas and SF6The dielectric constants of the gas and solid insulators are very different, so that electric field distortion inevitably occurs at the intersection of the three media of the conductor, the solid insulator and the insulating gas. The usual solutions mainly include increasing the insulation distance and shielding against electric field distortions. If the insulation distance is increased only, thatHowever, the whole volume of the switch cabinet is inevitably increased, so that the advantages of small size and space saving of the gas insulation switch cabinet are lost. How to improve the overall insulation performance of the switch cabinet without increasing the overall size of the switch cabinet becomes an urgent problem to be solved.
An environment-friendly gas insulation ring main unit is disclosed in the Chinese patent with the publication number of CN105244798B, and comprises an air tank, an isolation operating mechanism, a breaker operating mechanism and an isolating switch, wherein female coupling seats are arranged on the left side and the right side of the upper part of the air tank, an insulation shaft of the isolating switch is connected with an output shaft of the isolation operating mechanism, a breaker pole is arranged below the isolating switch, rear outlet ends of three poles are connected with a current conducting plate of the isolating switch through an upper feeder, lower outlet ends of the poles are connected with a sleeve through a lower feeder, and a main connecting plate of the isolating switch is connected with the female coupling seats through vertical conducting pieces; in order to optimize electric field distribution, the conductive connecting piece is connected with each component and part by adopting a pressure equalizing piece, the pressure equalizing piece comprises a pressure equalizing ring, a screw hole and a nut counter bore, the screw hole and the nut counter bore are positioned in the middle of the pressure equalizing piece, a screw penetrates through the screw hole in the pressure equalizing piece, the nut is sunk into the nut counter bore, and the nut is lower than the pressure equalizing ring surface.
The voltage equalizing piece that adopts in the environmental protection gas insulation looped netowrk cabinet that aforementioned patent relates only surrounds the screwhead in the use, has realized the even to electric field around the connecting screw, and can not play the even effect to the electric field of high-voltage electrification spare and insulating part hookup location, and the looped netowrk cabinet is inhomogeneous at high-voltage electrification spare and insulating part hookup location electric field distribution, and whole insulating properties is relatively poor.
Disclosure of Invention
The invention aims to provide a switch cabinet, which aims to solve the problems that in the prior art, the electric field distribution at the connecting position of a high-voltage electrified part and an insulating part of the switch cabinet is uneven, and the whole insulating property is poor.
In order to realize the purpose, the technical scheme of the switch cabinet is as follows:
the cubical switchboard includes the cabinet body and installs the internal electric parts at the cabinet, and the internal environmental protection insulating gas that has of cabinet, electric parts include insulator and the high-voltage charging spare of fixed mounting on the insulator, and the hookup location of insulator and high-voltage charging spare still is fixed with the insulator separation in the cubical switchboard, with high-voltage charging spare electric connection's equalizer ring, and the equalizer ring shelters from the position department that intersects at insulator, high-voltage charging spare and environmental protection insulating gas.
Grading ring and insulating part separation, with high-voltage charge spare electric connection, consequently, the same electric potential has on grading ring and the high-voltage charge spare, three kinds of medium intersection electric field distortion of insulating part and environmental protection insulating gas are serious, the environmental protection insulating gas is punctureed easily to the electric current and to the cabinet body discharge, shelter from the grading ring at the insulating part, high-voltage charge spare and environmental protection insulating gas's intersection position department, can utilize the electric field distortion that the high-voltage charge spare and insulating part hookup location department were fallen in the grading ring shielding, even this department electric field, make cubical switchboard overall insulation performance obtain improving.
Furthermore, a sealed insulating gas box is arranged in the cabinet body, environment-friendly insulating gas is filled in the sealed insulating gas box, and the grading ring is located at the connecting position of the insulating part and the high-voltage electrified part in the sealed insulating gas box. The electric field distortion at the intersection of three media, namely a high-voltage electrified part, an insulating part and environment-friendly insulating gas is serious, and the grading ring is arranged at the position to achieve a better insulating effect.
Furthermore, the environment-friendly insulating gas filled in the sealed insulating gas box is nitrogen, carbon dioxide or dry air. The cost is lower and the influence on the environment is small.
On the basis of any one of the above schemes, the insulating part is connected with the high-voltage electrified part through a screw, and the equalizing ring is fixed through the screw. Fixed connection is convenient, can realize the electric connection of high voltage electrification spare and equalizer ring moreover.
Further, the grading ring comprises an annular pipe body, a fixing plate is arranged in the ring of the annular pipe body, and a screw hole is formed in the fixing plate. The screws penetrate through the screw through holes in the fixing plate so as to fixedly connect the grading ring with the high-voltage electrified part.
On the basis of any one of the schemes, the high-voltage electrified part is a guide plate, and the grading ring is arranged at the end part of the guide plate and shields the contact position of the insulating part and the guide plate. The distortion of the electric field at the end part of the guide plate is serious, the equalizing ring is arranged in the electric field at the position, which can be better, of the guide plate end part, the equalizing ring shields the contact position of the insulating piece and the guide plate, the situation that the current at the position is discharged to the cabinet body after penetrating through the environment-friendly insulating gas due to the serious distortion of the electric field at the end part of the guide plate can be avoided, and the insulating property of the switch.
When the cabinet body is internally provided with a sealed insulating gas tank, the high-voltage electrified part is a guide plate, the equalizing ring is positioned between the end part of the guide plate and the tank wall of the sealed insulating gas tank, and is positioned at one side, close to the tank wall of the sealed insulating gas tank, of the connecting position of the insulating part and the guide plate. The current is prevented from being discharged to the box body after the environment-friendly insulating gas is punctured.
The grading ring comprises two U-shaped pipes, and the opening sides of the two U-shaped pipes are butted to form the annular pipe body.
Or the grading ring comprises two U-shaped pipes with opposite openings and a straight pipe connected between the two U-shaped pipes, and the two U-shaped pipes and the straight pipe jointly enclose the annular pipe body. The two U-shaped tubes and the straight tube are matched for use, so that uniform electric fields in different ranges can be provided according to requirements.
The grading ring is arranged on one side of the insulating part, which is back to the high-voltage electrified part. The position of the grading ring can be flexibly changed as required to homogenize the electric field in a specific range.
Drawings
Fig. 1 is a schematic structural view of a high voltage live part with a grading ring fixed at an end thereof in embodiment 1 of the switch cabinet of the present invention;
fig. 2 is a schematic structural diagram of a grading ring fixed to a side of an insulating member facing away from a high-voltage live part in embodiment 1 of the switch cabinet of the present invention;
fig. 3 is a schematic structural diagram of a grading ring in embodiment 1 of the switch cabinet of the present invention;
fig. 4 is a schematic structural diagram of a grading ring in embodiment 2 of the switch cabinet of the present invention;
in the figure: 11-an insulator; 12-a high voltage charged member; 13-a screw; 14-sealing an insulating gas tank; 15-environment-friendly insulating gas; 2-grading rings; 21-a U-shaped tube; 22-straight pipe; 23-fixing the plate; 230-screw penetration; 3-grading ring support frames; 4-equalizing ring supporting sleeve.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1 to 3, a switch cabinet according to embodiment 1 of the present invention includes a cabinet body and an electrical component installed in the cabinet body, wherein the cabinet body contains an environment-friendly insulating gas 15, and the electrical component includes an insulating member 11 and a high-voltage live part 12 fixedly installed on the insulating member 11. The internal sealed insulating gas tank 14 that is equipped with of cabinet, be full of environmental protection insulating gas 15 in the sealed insulating gas tank 14, the insulator 11 that is located sealed insulating gas tank 14 and the hookup location department of high voltage strip spare 12 are fixed with equalizer ring 2, equalizer ring 2 and the 12 electric connection of high voltage strip spare, with the separation of insulator 11, equalizer ring 2 shelters from in insulator 11, the intersection position department of high voltage strip spare 12 and environmental protection insulating gas 15. Insulating part 11 passes through screw 13 with the electrified piece 12 of high voltage and is connected, and equalizer ring 2 also realizes fixedly through this screw 13, and fixed connection is convenient like this not only, can realize the electric connection of the electrified piece 12 of high voltage and equalizer ring 2 moreover. As shown in fig. 3, the grading ring 2 includes two U-shaped tubes 21 with opposite openings and a circular cross section and a straight tube 22 connected between the two U-shaped tubes 21, and the two U-shaped tubes 21 and the straight tube 22 together form an annular tube. The fixing plate 23 is arranged in the ring of the annular pipe body, the screw through hole 230 is arranged on the fixing plate 23, and the screw 13 penetrates through the screw through hole 230 on the fixing plate 23 so as to fixedly connect the grading ring 2 with the high-voltage electrified part 12. The fixing plate 23 is welded to the annular tube, but may be integrally formed therewith.
High-voltage charging spare 12, the inevitable electric field distortion that can take place in insulator 11 and the 15 three kinds of medium intersections of environmental protection insulating gas, take place for avoiding the phenomenon of discharging, pass through equalizer ring support frame 3 with equalizer ring 2 and fix to high-voltage charging spare 12 on, make high-voltage charging spare 12 and equalizer ring 2 have equal electric potential, make equalizer ring 2 shelter from at insulator 11, the high-voltage charging spare 12 and the 15 intersection position department of environmental protection insulating gas, utilize equalizer ring 2 to shield the electric field distortion of three kinds of medium intersections, even this department electric field, improve the whole insulating properties of cubical switchboard. High voltage strip spare 12 is the guide plate in this embodiment, the guide plate, electric field distortion takes place for three kinds of medium intersections of 11 and the insulating gas of environmental protection 15, especially more serious at guide plate tip electric field distortion, therefore, preferentially, set up equalizer ring 2 between the tank wall of guide plate tip and sealed insulating gas case 14, and be in one side that is close to the 14 tank walls of sealed insulating gas case of 11 and guide plate hookup location of insulating part, equalizer ring 2 shelters from insulating part 11 and guide plate contact position, with the electric field of this department of better uniformity, avoid the electric current to puncture the box discharge behind the insulating gas of environmental protection 15. In this embodiment, the environment-friendly insulating gas 15 is nitrogen, and certainly, other environment-friendly insulating gases such as dry air and carbon dioxide may be used.
The high voltage electrified part 12 and the insulating part 11 are fixedly connected through a screw 13, as shown in fig. 1, when the screw 13 is in direct contact with the high voltage electrified part 12 and is not in direct contact with the insulating part 11, electric field distortion occurs at the intersection of three media of the high voltage electrified part 12, the insulating part 11 and the environment-friendly insulating gas 15, and the equalizing part 2 is arranged between the end of the high voltage electrified part 12 and the wall of the sealed insulating gas box 14, so as to better equalize the electric field generated at the intersection of the three media.
When the screw 13 is first inserted into the insulator 11 and then inserted into the high voltage electrified part 12, as shown in fig. 2, the screw head is located on the side of the insulator 11 facing away from the high voltage electrified part 12, at this time, the screw 13 is not in direct contact with the high voltage electrified part 12, but in direct contact with the insulator 11, and the screw 13 has the same potential as that on the high voltage electrified part 12, so that the electric field distortion inevitably occurs at the intersection of the three mediums, i.e., the electrified screw 13, the insulator 11 and the environment-friendly insulating gas 15. For the electric field that produces of even three intersection, the current breakdown environmental protection insulating gas 15 of avoiding the three intersection discharges to sealed insulating gas tank 14 box, has set up equalizer ring 2 in the hookup location department of electrified screw 13 and insulating part 11 to support set 4 with equalizer ring 2 and insulating part 11 through equalizer ring and keep apart certain distance. The equalizing ring 2 is utilized to shield the electric field distortion generated at the intersection of the three mediums of the electrified screw 13, the insulating part 11 and the environment-friendly insulating gas 15, so as to homogenize the electric field at the intersection.
In the above embodiment 1, the grading ring 2 includes two U-shaped tubes 21 with opposite openings and a straight tube 22 connected between the two U-shaped tubes 21, the two U-shaped tubes 21 and the straight tube 22 together form an annular tube, the two U-shaped tubes 21 and the straight tube 22 cooperate to provide uniform electric fields in different ranges as required, a fixing plate 23 is disposed in the ring of the annular tube, and a screw hole 230 is disposed on the fixing plate 23. In embodiment 2, when a uniform electric field in a small range needs to be ensured, as shown in fig. 4, the open sides of the two U-shaped tubes 21 may be butted to form an annular tube body without arranging a straight tube; of course, the two U-shaped tubes 21 may also be formed integrally.
In the above embodiment 1, a sealed insulating gas box is provided in the switch cabinet, the sealed insulating gas box is filled with environment-friendly insulating gas, a grading ring is provided at a connection position of an insulating member and a high-voltage electrified member in the sealed insulating gas box, and an electric field distortion generated at an intersection of three mediums, namely the high-voltage electrified member, the insulating member and the environment-friendly insulating gas is shielded by the grading ring, so that an electric field is uniform. In other embodiments, a grading ring can be arranged at the connecting position of the insulating part and the high-voltage electrified part inside the cabinet body and outside the sealed insulating gas box; when not establishing sealed insulating gas case in the cubical switchboard, the internal environment-friendly insulating gas that has of cabinet, can also set up the equalizer ring in the insulator of the internal at this moment and the hookup location department of the electrified piece of high voltage, utilize the equalizer ring to shield the electric field distortion of falling high voltage electrification spare, insulator and environment-friendly insulating gas three intersection position department, even this department electric field.
In the embodiment 1, the insulating member and the high voltage electrified member are connected by the screw, and the equalizing ring is fixed by the screw. In other embodiments, the grading ring can also be fixed by welding or riveting.
In the above embodiment 1, the high voltage charging member is a deflector. In other embodiments, the high voltage live part may also be other conductive parts such as a conductive bar.
Claims (9)
1. The utility model provides a switch cabinet, include the cabinet body and install the internal electric parts at the cabinet, electric parts include insulator and the electrified piece of high-voltage of fixed mounting on the insulator, characterized by, the internal sealed insulating gas case that is equipped with of cabinet, sealed insulating gas incasement is full of environmental protection insulating gas, the hookup location of the internal insulator of sealed insulating gas case and the electrified piece of high-voltage still is fixed with and separates with the insulator, with the electrified piece electric connection's of high-voltage equalizer ring, equalizer ring shelters from at the insulator, the electrified piece of high-voltage and environmental protection insulating gas's intersection position department, the anchor ring of equalizer ring is parallel with the tank wall of sealed insulating gas case.
2. The switchgear of claim 1, wherein the environment-friendly insulating gas filled in the sealed insulating gas box is nitrogen, carbon dioxide or dry air.
3. A switchgear cabinet as claimed in claim 1 or 2, wherein the insulator is connected to the high voltage live part by means of screws, by means of which the grading ring is also fixed.
4. The switchgear cabinet as claimed in claim 3, wherein the grading ring comprises a ring-shaped tube, and a fixing plate is provided in the ring of the ring-shaped tube, and the fixing plate is provided with screw through holes.
5. A switchgear cabinet as claimed in claim 1 or 2, wherein the high voltage live parts are deflectors and the grading rings are at the ends of the deflectors and shield the insulation parts from the contact position of the deflectors.
6. A switchgear cabinet as claimed in claim 1 or 2, wherein the said high voltage live parts are baffles, and the grading rings are located between the ends of the baffles and the walls of the sealed insulating gas tank, and on the side of the connection between the insulator and the baffles close to the walls of the sealed insulating gas tank.
7. The switchgear cabinet as claimed in claim 4, wherein the grading ring comprises two U-shaped tubes, the open sides of the two U-shaped tubes abutting to enclose the annular tube body.
8. The switchgear cabinet as claimed in claim 4, wherein the grading ring comprises two opposite U-shaped tubes and a straight tube connected between the two U-shaped tubes, the two U-shaped tubes and the straight tube together enclosing the annular tube.
9. The switchgear cabinet as claimed in claim 1, wherein the grading ring is on the side of the insulator facing away from the high voltage live parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811369411.2A CN109638701B (en) | 2018-11-16 | 2018-11-16 | Switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811369411.2A CN109638701B (en) | 2018-11-16 | 2018-11-16 | Switch cabinet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109638701A CN109638701A (en) | 2019-04-16 |
| CN109638701B true CN109638701B (en) | 2020-11-17 |
Family
ID=66068333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811369411.2A Active CN109638701B (en) | 2018-11-16 | 2018-11-16 | Switch cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109638701B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111627623B (en) * | 2020-05-28 | 2021-08-27 | 西安交通大学 | Grading ring assembly for closed impulse voltage generator |
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| CN106025905A (en) * | 2016-07-22 | 2016-10-12 | 新疆特变电工自控设备有限公司 | Inflatable compound insulated switch cabinet |
| CN205900883U (en) * | 2016-08-16 | 2017-01-18 | Abb瑞士股份有限公司 | Interior awl socket subassembly |
| CN206490014U (en) * | 2017-03-01 | 2017-09-12 | 福建中网电气有限公司 | A kind of pressure-equalizing device for earthed switch contact system |
| CN107543999A (en) * | 2016-06-24 | 2018-01-05 | 国网辽宁省电力有限公司沈阳供电公司 | Dry type Compound Insulation Wall Bushing electrical insulation properties test lifting platform |
| CN207302761U (en) * | 2017-09-06 | 2018-05-01 | 连云港和风风电有限公司 | One kind presses shading ring |
| CN108172351A (en) * | 2016-12-07 | 2018-06-15 | 中国电力科学研究院 | A kind of grading ring for enhancing transmission circuit insulator string dielectric strength |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109638701A (en) | 2019-04-16 |
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