CN109638701A - A kind of switchgear - Google Patents

A kind of switchgear Download PDF

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Publication number
CN109638701A
CN109638701A CN201811369411.2A CN201811369411A CN109638701A CN 109638701 A CN109638701 A CN 109638701A CN 201811369411 A CN201811369411 A CN 201811369411A CN 109638701 A CN109638701 A CN 109638701A
Authority
CN
China
Prior art keywords
electrification
high voltage
insulating
grading ring
switchgear
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.)
Granted
Application number
CN201811369411.2A
Other languages
Chinese (zh)
Other versions
CN109638701B (en
Inventor
吴小钊
李长鹏
李俊豪
翟贺鹏
李鹏
刘永庆
张艳晓
王小丽
张文凯
肖皓天
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
XUCHANG XUJI DRIESCHER WEGBERG ELECTRIC CO Ltd
State Grid Corp of China SGCC
Xuji Group Co Ltd
XJ Electric Co Ltd
Xuchang XJ Software Technology Co Ltd
Original Assignee
XUCHANG XUJI DRIESCHER WEGBERG ELECTRIC CO Ltd
State Grid Corp of China SGCC
Xuji Group Co Ltd
XJ Electric Co Ltd
Xuchang XJ Software Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by XUCHANG XUJI DRIESCHER WEGBERG ELECTRIC CO Ltd, State Grid Corp of China SGCC, Xuji Group Co Ltd, XJ Electric Co Ltd, Xuchang XJ Software Technology Co Ltd filed Critical XUCHANG XUJI DRIESCHER WEGBERG ELECTRIC CO Ltd
Priority to CN201811369411.2A priority Critical patent/CN109638701B/en
Publication of CN109638701A publication Critical patent/CN109638701A/en
Application granted granted Critical
Publication of CN109638701B publication Critical patent/CN109638701B/en
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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00Arrangements of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02Arrangements of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035Gas-insulated switchgear
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00Arrangements of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02Arrangements of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/025Safety arrangements, e.g. in case of excessive pressure or fire due to electrical defect
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00Arrangements of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02Arrangements of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035Gas-insulated switchgear
    • H02B13/055Features relating to the gas

Abstract

The present invention relates to field of electrical equipment, and in particular to a kind of switchgear.Switchgear includes cabinet body and is mounted on the intracorporal electric component of cabinet, there is environmentally friendly insulating gas in cabinet body, electric component includes insulating part and the electrification in high voltage part being fixedly mounted on insulating part, link position in switchgear in insulating part and electrification in high voltage part is further fixed on the grading ring for separating with insulating part, being electrically connected with electrification in high voltage part, and grading ring blocks at the position that crosses of insulating part, electrification in high voltage part and environmentally friendly insulating gas.Grading ring and electrification in high voltage part are electrically connected, therefore the two has same equipotential, grading ring is blocked at the position that crosses of insulating part, electrification in high voltage part and environmentally friendly insulating gas, it can use grading ring and mask electrification in high voltage part and the electric field distortion at insulating part link position, uniformly electric field at this, is improved switchgear integral insulation performance.

Description

A kind of switchgear
Technical field
The present invention relates to field of electrical equipment, and in particular to a kind of switchgear.
Background technique
Existing gas insulation switch cabinet mainly uses SF6Gas, due to SF6Gas can damage environment, therefore, Environmental-protective gas-insulating switchgear has become following development trend.Inside switch cabinet be generally fitted with casing, pole, absolutely The insulating parts such as edge, each insulating part constitute the indispensable part of high-tension switch cabinet.By environmental-protective gas-insulating switchgear institute The insulating gas and SF used6Gas, the dielectric constants of solid insulation are very big, therefore, in electric conductor, solid insulation And electric field distortion inevitably occurs for three kinds of medium intersections of insulating gas.Common solution mainly includes increasing Insulation distance and mask electric field distortion.If the overall volume of single increase insulation distance, switchgear certainly will increase, To lose, gas insulation switch cabinet size is small, space-saving advantage.How the same of switchgear overall dimensions is not being increased The integral insulation performance of Shi Tigao switchgear becomes the problem of urgent need to resolve.
A kind of environmentally friendly gas-insulated ring network cabinet, the ring are disclosed in the Chinese patent that Authorization Notice No. is CN105244798B Net cabinet includes gas tank, isolation operating mechanism, breaker operation mechanism and disconnecting switch, is equipped with mother at left and right sides of gas tank top Seat, the shaft insulation of disconnecting switch and the output axis connection that operating mechanism be isolated, disconnecting switch lower section is equipped with circuit breaker polar, and three Leading-out terminal is connected by upper feeder line and the conductive plate of disconnecting switch after pole, and pole lower wire end is connected by lower feeder line and casing It connects, the main connecting plate of disconnecting switch is connect by vertical setting of types conduct piece with mother block;In order to optimize field distribution, electric conductivity connector Connection with each component has been all made of equal casting die, and equal casting die includes pressing annulus and screw hole, spiral shell in the middle part of equal casting die Screw is passed through the screw hole on equal casting die by cap counterbore, and nut sinks to nut counterbore, and nut is lower than pressure anchor ring.
Equal casting die employed in environmental protection gas-insulated ring network cabinet involved in aforementioned patent only will in use Head of screw surrounds, and realizes to the uniform of attachment screw surrounding electric field, is unable to electrification in high voltage part and insulating part connection position The electric field set plays stepless action, and ring network cabinet non-uniform electric at electrification in high voltage part and insulating part link position is whole Insulation performance is poor.
Summary of the invention
The purpose of the present invention is to provide a kind of switchgear, with solve switchgear in the prior art electrification in high voltage part with The poor problem of non-uniform electric, integral insulation performance at insulating part link position.
To achieve the above object, the technical solution of switchgear of the present invention is:
Switchgear includes cabinet body and is mounted on the intracorporal electric component of cabinet, has environmentally friendly insulating gas, electric component in cabinet body Including insulating part and the electrification in high voltage part being fixedly mounted on insulating part, the interior company in insulating part and electrification in high voltage part of switchgear It connects position and is further fixed on the grading ring for separating with insulating part, being electrically connected with electrification in high voltage part, grading ring is blocked in insulating part, height At the position that crosses for pressing live part and environmentally friendly insulating gas.
Grading ring is separated with insulating part, is electrically connected with electrification in high voltage part, therefore is had on grading ring and electrification in high voltage part Same equipotential, electrification in high voltage part, insulating part and three kinds of medium intersection electric field distortions of environmentally friendly insulating gas are serious, and electric current is easy Puncture environmentally friendly insulating gas and discharge cabinet body, grading ring is blocked in insulating part, electrification in high voltage part and environmentally friendly insulating gas The position that crosses at, can use grading ring and mask electric field distortion at electrification in high voltage part and insulating part link position, uniformly Electric field at this is improved switchgear integral insulation performance.
Further, it is equipped with sealed insulation gas tank in cabinet body, environmentally friendly insulating gas, grading ring are full of in sealed insulation gas tank Insulating part in sealed insulation gas tank and at the link position of electrification in high voltage part.Electrification in high voltage part, insulating part and environmental protection Three kinds of medium intersection electric field distortions of insulating gas are serious, and grading ring is set can play better insulation effect in the position.
Further, the environmentally friendly insulating gas being full of in the sealed insulation gas tank is nitrogen, carbon dioxide or drying Air.Cost is relatively low and effect on environment is small.
On the basis of any one of the above scheme, the insulating part is connected by screw to electrification in high voltage part, grading ring It realizes and fixes also by the screw.It is fixedly connected conveniently, and can be realized the electric connection of electrification in high voltage part and grading ring.
Further, the grading ring includes looping tube, is equipped with fixed plate in the ring of looping tube, fixed plate is equipped with Screw perforation.Screw passes through the screw perforation in fixed plate to which grading ring to be fixedly connected with electrification in high voltage part.
On the basis of any one of the above scheme, the electrification in high voltage part is deflector, and grading ring is in deflector end Simultaneously block insulating part and deflector contact position in portion.The distortion of deflector Analysis of End Electric Field is serious, and grading ring is located at deflector end It can preferably uniformly electric field, grading ring block insulating part and deflector contact position and then can be avoided because of deflector end at this Electric field distortion is serious and electric current at this is caused to discharge after puncturing environmentally friendly insulating gas to cabinet body, improves switchgear insulation performance.
When being equipped with sealed insulation gas tank in cabinet body, the electrification in high voltage part is deflector, and grading ring is in deflector end Between portion and the tank wall of sealed insulation gas tank, and it is in the close sealed insulation gas tank tank wall of insulating part and deflector link position Side.It discharges after avoiding electric current from puncturing environmentally friendly insulating gas to cabinet.
The grading ring includes two U-tubes, and the open side docking of two U-tubes is to surround the looping tube.
Alternatively, the grading ring includes two be open opposite U-tubes and the straight tubes that are connected between two U-tubes, two U Shape pipe and straight tube surround the looping tube jointly.Two U-tubes and straight tube, which are used cooperatively, can according to need offer different range Uniform electric field.
The grading ring is in the side backwards to electrification in high voltage part of insulating part.The position of grading ring can according to need spirit It is living to change, with the electric field of uniform particular range.
Detailed description of the invention
Fig. 1 shows for the structure that the 1 middle-high pressure electrification part end of specific embodiment of switchgear of the invention is fixed with grading ring It is intended to;
Fig. 2 is that the side backwards to electrification in high voltage part of insulating part in the specific embodiment 1 of switchgear of the invention is fixed with The structural schematic diagram of grading ring;
Fig. 3 is the structural schematic diagram of grading ring in the specific embodiment 1 of switchgear of the invention;
Fig. 4 is the structural schematic diagram of grading ring in the specific embodiment 2 of switchgear of the invention;
In figure: 11- insulating part;12- electrification in high voltage part;13- screw;14- sealed insulation gas tank;15- environmental protection insulating gas; 2- grading ring;21-U shape pipe;22- straight tube;23- fixed plate;230- screw perforation;3- grading ring support frame;The support of 4- grading ring Set.
Specific embodiment
Embodiments of the present invention are described further with reference to the accompanying drawing.
The specific embodiment 1 of switchgear of the invention as shown in Figure 1 to Figure 3, including cabinet body and is mounted on the intracorporal electricity of cabinet Gas component has environmentally friendly insulating gas 15 in cabinet body, and electric component includes insulating part 11 and is fixedly mounted on insulating part 11 Electrification in high voltage part 12.It is equipped with sealed insulation gas tank 14 in cabinet body, environmentally friendly insulating gas 15 is full of in sealed insulation gas tank 14, is located at Insulating part 11 in sealed insulation gas tank 14 and grading ring 2 is fixed at the link position of electrification in high voltage part 12, grading ring 2 and high It presses live part 12 to be electrically connected, is separated with insulating part 11, grading ring 2 is blocked in insulating part 11, electrification in high voltage part 12 and environmental protection At the position that crosses of insulating gas 15.Insulating part 11 is connect with electrification in high voltage part 12 by screw 13, and grading ring 2 is also by the spiral shell Nail 13, which is realized, to be fixed, and is not only fixedly connected so conveniently, but also can be realized electrification in high voltage part 12 and the electrical property of grading ring 2 connects It connects.As shown in figure 3, grading ring 2 include the U-tube 21 that two openings are opposite, cross sections are circle and be connected to two U-tubes 21 it Between straight tube 22, two U-tubes 21 surround looping tube with straight tube 22 jointly.Fixed plate 23 is equipped in the ring of looping tube, it is fixed Plate 23 is equipped with screw perforation 230, and screw 13 passes through the screw perforation 230 in fixed plate 23 thus by grading ring 2 and high pressure belt Electric part 12 is fixedly connected.Fixed plate 23 and looping tube are welded to connect, it is of course also possible to be integrally formed.
15 3 kinds of electrification in high voltage part 12, insulating part 11 and environmentally friendly insulating gas medium intersections inevitably occur Grading ring 2 is fixed on electrification in high voltage part 12 by grading ring support frame 3, is made to avoid electric discharge phenomena by electric field distortion Electrification in high voltage part 12 and grading ring 2 have same equipotential, block grading ring 2 in insulating part 11, electrification in high voltage part 12 and ring It protects at the position that crosses of insulating gas 15, the electric field distortion of three kinds of medium intersections is masked using grading ring 2, uniformly electricity at this , improve switchgear integral insulation performance.The present embodiment middle-high pressure electrification part 12 be deflector, deflector, insulating part 11 and Electric field distortion occurs for 15 3 kinds of medium intersections of environmentally friendly insulating gas, especially distorts in deflector Analysis of End Electric Field even more serious, because This, it is preferable that grading ring 2 is arranged between deflector end and the tank wall of sealed insulation gas tank 14, and is in insulating part 11 With the side of close 14 tank wall of sealed insulation gas tank of deflector link position, grading ring 2 shelters from insulating part 11 and deflector Contact position is discharged after avoiding electric current from puncturing environmentally friendly insulating gas 15 to cabinet with preferably uniform electric field at this.The present embodiment In, environmentally friendly insulating gas 15 is using nitrogen, it is, of course, also possible to which other environmental protection are insulated using dry air, carbon dioxide etc. Gas.
Electrification in high voltage part 12 is fixedly connected with insulating part 11 by screw 13, as shown in Figure 1, working as screw 13 and electrification in high voltage Part 12 directly contacts, and when being not directly contacted with insulating part 11, electrification in high voltage part 12, insulating part 11 and environmentally friendly insulating gas 15 Electric field distortions occur for three kinds of medium intersections, and 12 end of electrification in high voltage part and sealed insulation gas tank 14 is arranged in equal casting die 2 Between tank wall, with the electric field that preferably uniform three kinds of medium intersections generate.
When screw 13 first penetrates insulating part 11, after when piercing into electrification in high voltage part 12, as shown in Fig. 2, head of screw be located at it is exhausted The side backwards to electrification in high voltage part 12 of edge part 11, at this point, screw 13 is not directly contacted with electrification in high voltage part 12, and and insulating part 11 directly contact, and on screw 13 have with current potential same on electrification in high voltage part 12, in this way, electrification screw 13, insulating part 11 And electric field distortion just inevitably occurs for 15 3 kinds of medium intersections of environmentally friendly insulating gas.For the production of uniform three intersection Raw electric field discharges after avoiding the electric current of three intersection from puncturing environmentally friendly insulating gas 15 to 14 cabinet of sealed insulation gas tank, Charge and be provided with grading ring 2 at the link position of screw 13 and insulating part 11, and by grading ring support sleeve 4 by grading ring 2 with Insulating part 11 keeps apart certain distance.Screw 13, insulating part 11 and environmentally friendly 15 3 kinds of insulating gas will be charged using grading ring 2 The electric field distortion that medium intersection generates masks, uniformly electric field at this.
In above-described embodiment 1, grading ring 2 includes two opposite U-tubes 21 of opening and is connected between two U-tubes 21 Straight tube 22, two U-tubes 21 and straight tube 22 surround looping tube jointly, and two U-tubes 21 and straight tube 22 are with the use of can basis It needs to provide the uniform electric field of different range, fixed plate 23 is equipped in the ring of looping tube, fixed plate 23 is equipped with screw perforation 230.In example 2, when needing to guarantee small range of uniform electric field, as shown in figure 4, straight tube can not also be set, by two The open side docking of a U-tube 21 surrounds looping tube;Certainly, two U-tubes 21 can also be integrally formed.
In above-described embodiment 1, it is equipped with sealed insulation gas tank in switchgear, environmental protection insulation gas is filled in sealed insulation gas tank Body is equipped with grading ring at the link position of the insulating part and electrification in high voltage part that are located in sealed insulation gas tank, utilizes grading ring The electric field distortion that electrification in high voltage part, insulating part and environmentally friendly three kinds of medium intersections of insulating gas generate is masked, uniformly at this Electric field.In other embodiments, insulating part and electrification in high voltage part that can also simultaneously in cabinet body outside sealed insulation gas tank Link position at be arranged grading ring;When not setting sealed insulation gas tank in switchgear, there is environmentally friendly insulating gas in cabinet body, at this time Grading ring can also be set at the link position of the intracorporal insulating part of cabinet and electrification in high voltage part, mask high pressure using grading ring Live part, insulating part and environmentally friendly insulating gas three cross the electric field distortion at position, uniformly electric field at this.
In above-described embodiment 1, insulating part is connected by screw to electrification in high voltage part, and grading ring is realized solid also by the screw It is fixed.In other embodiments, grading ring can also be fixed by the way of welding or riveting.
In above-described embodiment 1, electrification in high voltage part is deflector.In other embodiments, electrification in high voltage part can also be to lead Other conduct pieces such as electricity row.

Claims (10)

1. a kind of switchgear, including cabinet body and it is mounted on the intracorporal electric component of cabinet, has environmentally friendly insulating gas, electrical part in cabinet body Part includes insulating part and the electrification in high voltage part being fixedly mounted on insulating part, characterized in that in insulating part and height in switchgear The link position of pressure live part is further fixed on the grading ring for separating with insulating part, being electrically connected with electrification in high voltage part, and grading ring hides It keeps off at the position that crosses in insulating part, electrification in high voltage part and environmentally friendly insulating gas.
2. switchgear according to claim 1, characterized in that be equipped with sealed insulation gas tank, sealed insulation gas tank in cabinet body Interior to be full of environmentally friendly insulating gas, grading ring is at the link position of the insulating part in sealed insulation gas tank and electrification in high voltage part.
3. switchgear according to claim 2, characterized in that the environmentally friendly insulating gas being full of in the sealed insulation gas tank For nitrogen, carbon dioxide or dry air.
4. switchgear according to claim 1 or 2 or 3, characterized in that the insulating part and electrification in high voltage part pass through screw Connection, grading ring are realized also by the screw and are fixed.
5. switchgear according to claim 4, characterized in that the grading ring includes looping tube, the ring of looping tube Interior to be equipped with fixed plate, fixed plate is equipped with screw perforation.
6. switchgear described according to claim 1 or 2 or 3, characterized in that the electrification in high voltage part is deflector, is pressed Ring is in deflector end and blocks insulating part and deflector contact position.
7. switchgear according to claim 2 or 3, characterized in that the electrification in high voltage part is deflector, and grading ring is in Between deflector end and the tank wall of sealed insulation gas tank, and it is in the close sealed insulation of insulating part and deflector link position The side of gas tank tank wall.
8. switchgear according to claim 5, characterized in that the grading ring includes two U-tubes, two U-tubes Open side docking is to surround the looping tube.
9. switchgear according to claim 5, characterized in that the grading ring include two opposite U-tubes of opening with And it is connected to the straight tube between two U-tubes, two U-tubes and straight tube surround the looping tube jointly.
10. switchgear according to claim 1, characterized in that the grading ring is in the electrification in high voltage backwards of insulating part The side of part.
CN201811369411.2A 2018-11-16 2018-11-16 Switch cabinet Active CN109638701B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811369411.2A CN109638701B (en) 2018-11-16 2018-11-16 Switch cabinet

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Application Number Priority Date Filing Date Title
CN201811369411.2A CN109638701B (en) 2018-11-16 2018-11-16 Switch cabinet

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CN109638701A true CN109638701A (en) 2019-04-16
CN109638701B CN109638701B (en) 2020-11-17

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111627623A (en) * 2020-05-28 2020-09-04 西安交通大学 Grading ring assembly for closed impulse voltage generator

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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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CN101320873A (en) * 2007-11-23 2008-12-10 北海银河高科技产业股份有限公司 High-voltage great-current fixed sealing type bus connector and its production method
CN201387796Y (en) * 2009-03-31 2010-01-20 泰安泰山电气有限公司 Shielding ring of grounding body in position of high field strength of transformer,
CN202111407U (en) * 2010-08-23 2012-01-11 沈阳华利能源设备制造有限公司 Dry air insulated metal enclosed switchgear
EP2618341A2 (en) * 2012-01-23 2013-07-24 General Electric Company High voltage bushing assembly
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111627623A (en) * 2020-05-28 2020-09-04 西安交通大学 Grading ring assembly for closed impulse voltage generator
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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