CN108648947B - Three-station isolation grounding switch - Google Patents
Three-station isolation grounding switch Download PDFInfo
- Publication number
- CN108648947B CN108648947B CN201810936564.4A CN201810936564A CN108648947B CN 108648947 B CN108648947 B CN 108648947B CN 201810936564 A CN201810936564 A CN 201810936564A CN 108648947 B CN108648947 B CN 108648947B
- Authority
- CN
- China
- Prior art keywords
- screw
- driving
- plate
- contact
- pull rod
- 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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Links
- 238000002955 isolation Methods 0.000 title claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 26
- 230000003068 static effect Effects 0.000 claims description 10
- 125000006850 spacer group Chemical group 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000033001 locomotion Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000001360 synchronised effect Effects 0.000 abstract description 2
- 239000012212 insulator Substances 0.000 description 5
- 239000004020 conductor Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/026—Movable parts and contacts mounted thereon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/003—Earthing switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/04—Interlocking mechanisms
- H01H31/08—Interlocking mechanisms for interlocking two or more parts of the mechanism for operating contacts
Abstract
The utility model provides a three-station isolation earthing switch, it is complicated to have overcome prior art and adopted insulating lead screw three-phase to drive respectively, the structure is complicated, insulating lead screw design requirement is high, insulating strength, partial discharge level and mechanical strength all are difficult for guaranteeing and realize the mechanism output through chain drive and turn into three-phase drive, the design adjustment degree of difficulty is big, the noise is also great during operation, the problem to three-phase synchronous adjustment difficulty is characterized in that mounting panel and backup pad are connected through 4 point support and are formed into a whole, the movable contact is connected with insulating pull rod, insulating pull rod is connected with the drive plate is unsteady, install metal lead screw between mounting panel and backup pad, install the drive screw on the drive plate, beneficial effect is, insulating pull rod is connected with the drive plate is unsteady, the contact reliability and the life of sound contact have been improved, rotatory reciprocal rectilinear motion who drives the movable contact in the drive screw through metal lead screw, simple structure, and metal lead screw mechanical strength is high, the life of product has been improved.
Description
Technical Field
The invention belongs to the technical field of high-voltage appliances, and particularly relates to a three-station isolation grounding switch for gas-insulated metal-enclosed switchgear with voltage class of 24kV and below.
Background
In the prior art, three-station isolation grounding switch structure schemes for 24kV and below voltage class gas-insulated metal-enclosed switchgear are more, three phases of insulating screws are adopted for driving respectively, the structure is complex, the design requirement of the insulating screws is high, and the insulating strength, particularly the partial discharge level and the mechanical strength are not easy to guarantee. In addition, in the prior art, the output of a mechanism is converted into three-phase driving through chain transmission, so that the design and adjustment difficulty is high, the noise is high during operation, and the three-phase synchronization adjustment is difficult.
Disclosure of Invention
The invention aims to solve the problems of overcoming the defects of the prior art and providing the three-station isolation grounding switch which has the advantages of simple structure, high insulation level, fixed connection of three-phase movable conductors, high precision and no problem of synchronous adjustment so as to improve the power supply safety.
The technical proposal adopted by the invention comprises a three-station switch operating mechanism, a mounting plate, a driving plate and a supporting plate, wherein the mounting plate and the supporting plate are connected through 2 supporting columns and 2 guiding columns, the mounting plate and the supporting plate are connected through 4-point support to form a whole, the right end of the supporting plate is provided with a three-phase grounding static contact, an insulating support, a middle contact and an isolating static contact, spring contact fingers are arranged in the grounding static contact, the middle contact and the isolating static contact, the spring contact fingers are in conductive connection with a moving contact which linearly moves in the moving contact through the spring contact fingers, the moving contact is connected with an insulating pull rod through a first screw, the insulating pull rod is in floating connection with the driving plate through a second screw, a floating sleeve is arranged on the second screw, a shoulder at the left end of the floating sleeve passes through a floating sleeve through hole processed on the driving plate, the second screw at the left end of the floating sleeve is sleeved with a spacer, the through hole of the floating sleeve processed on the driving plate is larger than the outer diameter of the shoulder at the left end of the floating sleeve, the length of the shoulder at the left end of the floating sleeve is larger than the thickness of the driving plate, the second screw connects the spacer with the floating sleeve and the insulating pull rod together and is in a non-compression state with the driving plate to form a floating connection structure of the insulating pull rod and the driving plate, the insulating pull rod is in floating connection with the driving plate, a metal lead screw is arranged between the mounting plate and the supporting plate, the driving plate is provided with a guide sleeve sleeved on the guide post and a driving screw matched with the metal lead screw, the metal lead screw is connected with a mechanism output driving shaft of the three-position switch operating mechanism, the mechanism output driving shaft of the three-position switch operating mechanism drives the metal lead screw to rotate in the driving screw, the driving plate is driven to reciprocate to drive the reciprocating linear motion of moving contact, accomplish the three station switch and keep apart the switching-on position, the switching-off position and the conversion between the ground closing position 2 oil blanket are installed to bearing one side of the tip of metal lead screw, constitute the dynamic seal structure of metal lead screw.
Compared with the prior art, the three-phase movable conductor has the beneficial effects that the insulating pull rod is in floating connection with the driving plate, the driving resistance is reduced, the contact reliability and the service life of the movable contact are improved, the three-phase movable conductor is in floating connection with the driving plate through the insulating pull rod, the metal screw is driven to rotate in the driving screw by the mechanism output driving shaft of the three-station switch operating mechanism, and the driving plate is driven to reciprocate to linearly move by the rotation of the metal screw in the driving screw, so that the reciprocating linear movement of the movable contact is driven, the conversion between the three-station switch in the isolation closing position, the opening position and the grounding closing position is completed, the structure is simple, the mechanical strength of the metal screw is high, and the service life of a product is prolonged.
Drawings
Figure 1 is a front view of the present invention,
figure 2 is a top view of figure 1,
figure 3 is a schematic diagram of the floating connection structure of the insulating pull rod and the driving plate of the invention,
fig. 4 is a schematic view showing a state in which the present invention is installed in an air box.
In the figure:
1. the three-station switch operating mechanism comprises a three-station switch operating mechanism,
2. the mounting plate is provided with a plurality of grooves,
3.1. a metal lead screw is arranged on the upper surface of the metal lead screw,
3.2. the driving screw is used for driving the screw nut,
4. the guide post is arranged on the upper surface of the guide post,
5. the guide sleeve is provided with a guide sleeve,
6. the driving plate is provided with a driving plate,
7. the floating sleeve is provided with a plurality of floating sleeves,
7.1 the spacer is used for the insulation,
8. an insulating pull rod is arranged on the bottom of the insulating pull rod,
9. the movable contact is provided with a plurality of contact pins,
10. the support column is provided with a plurality of support grooves,
11. the support plate is provided with a plurality of grooves,
12. a grounding static contact is arranged on the ground,
13. an insulating support is provided for the insulating support,
14. the middle contact is provided with a plurality of contact holes,
15. the static contact is isolated,
16. the spring contact finger is used for connecting the spring contact finger,
17. the ground-connected insulator is arranged on the ground,
18. the ground is connected with a bus bar,
19. the insulator is provided with a plurality of grooves,
20. the first screw is provided with a first screw,
21. a second screw is provided to be fixed to the first screw,
22. and (3) oil sealing.
Description of the embodiments
Specific embodiments of the present invention are provided below with reference to the accompanying drawings.
As shown in fig. 1, 2 and 3, the technical scheme adopted by the invention comprises a three-station switch operating mechanism 1, a mounting plate 2 and a supporting plate 11, wherein the mounting plate 2 and the supporting plate 11 are connected through 2 supporting columns 10 and 2 guiding columns 4, the mounting plate 2 and the supporting plate 11 are connected through 4-point support to form a whole, a three-phase grounding fixed contact 12, an insulating support 13, a middle contact 14 and an isolating fixed contact 15 are arranged at the right end of the supporting plate 11, when in use, the isolating fixed contact 15 is connected with an insulator 19 arranged in an air box, spring contact fingers 16 are arranged in the grounding fixed contact 12, the middle contact 14 and the isolating fixed contact 15, conductive connection is realized through the spring contact fingers 16 and a moving contact 9 which linearly moves in the grounding fixed contact, the moving contact 9 is connected with an insulating pull rod 8 through a first screw 20, the insulating pull rod 8 is in floating connection with the driving plate 6 through a second screw 21, a floating sleeve 7 is arranged on the second screw 21, a shoulder at the left end of the floating sleeve 7 penetrates through a floating sleeve through hole processed on the driving plate 6, a spacer 7.1 is sleeved on the second screw 21 at the left end of the floating sleeve 7, as the floating sleeve through hole processed on the driving plate 6 is larger than the outer diameter of the shoulder at the left end of the floating sleeve 7, the length of the shoulder at the left end of the floating sleeve 7 is larger than the thickness of the driving plate 6, the second screw 21 is used for connecting the spacer 7.1 with the floating sleeve 7 and the insulating pull rod 8 and is in a non-pressing state with the driving plate 6, a floating connection structure of the insulating pull rod 8 and the driving plate 6 is formed, the insulating pull rod 8 is in floating connection with the driving plate 6, a metal lead screw 3.1 is arranged between the mounting plate 2 and the supporting plate 11, a guide sleeve 5 sleeved on the guide post 4 and a driving nut 3.2 matched with the metal screw 3.1 are arranged on the driving plate 6, 2 oil seals 22 are arranged on one side of a bearing at the end part of the metal screw 3.1 to form a dynamic sealing structure of the metal screw 3.1,
when the three-station switch is used, the metal lead screw 3.1 is connected with a mechanism output driving shaft of the three-station switch operating mechanism 1, the mechanism output driving shaft of the three-station switch operating mechanism 1 drives the metal lead screw 3.1 to rotate in the driving screw nut 3.2, and drives the driving plate 6 to reciprocate to linearly move, so that the reciprocating linear movement of the moving contact 9 is driven, the conversion between the three-station switch at an isolation closing position, a switching-off position and a grounding closing position is completed, the mounting plate 2 is provided with the grounding insulator 17 which is connected with the grounding connecting bus 18, and the grounding fixed contact 12 is connected with a system grounding network through the grounding connecting bus 18 and the grounding insulator 17.
Claims (1)
1. The three-station isolation grounding switch comprises a three-station switch operating mechanism (1), a mounting plate (2), a driving plate (6) and a supporting plate (11), and is characterized in that the mounting plate (2) and the supporting plate (11) are connected through 2 supporting columns (10) and 2 guiding columns (4), the mounting plate (2) and the supporting plate (11) are connected through 4-point support to form a whole, the right end of the supporting plate (11) is provided with a three-phase grounding static contact (12), an insulating support (13), a middle contact (14) and an isolation static contact (15), spring contact fingers (16) are arranged in the grounding static contact (12), the middle contact (14) and the isolation static contact (15), the spring contact fingers (16) are connected with a moving contact (9) which linearly moves in the mounting plate, the moving contact (9) is connected with an insulating pull rod (8) through a first screw (20), the insulating pull rod (8) is in floating connection with the driving plate (6) through a second screw (21), a floating sleeve (21) is provided with a floating shoulder (7) and a floating sleeve (7) is provided with a floating sleeve (7) which penetrates through a left end (7) of the floating sleeve (7), the floating sleeve through hole processed on the driving plate (6) is larger than the outer diameter of the shoulder at the left end of the floating sleeve (7), the length of the shoulder at the left end of the floating sleeve (7) is larger than the thickness of the driving plate (6), the second screw (21) connects the spacer (7.1) with the floating sleeve and the insulating pull rod together and is in a non-compression state with the driving plate (6), a floating connection structure of the insulating pull rod (8) and the driving plate (6) is formed, the insulating pull rod (8) is in floating connection with the driving plate (6), a metal lead screw (3.1) is arranged between the mounting plate (2) and the supporting plate (11), a guide sleeve (5) sleeved on the guide post (4) and a driving screw nut (3.2) matched with the metal screw rod (3.1) are arranged on the driving plate (6), the metal screw rod (3.1) is connected with a mechanism output driving shaft of the three-position switch operating mechanism (1), the mechanism output driving shaft of the three-position switch operating mechanism (1) drives the metal screw rod (3.1) to rotate in the driving screw nut (3.2) so as to drive the driving plate (6) to reciprocate and linearly, thereby driving the reciprocating and linearly moving contact (9) to finish the conversion between the three-position switch at an isolation switch-on position, a switch-off position and a grounding switch-on position, 2 oil seals (22) are arranged on one side of a bearing at the end part of the metal screw rod (3.1), a dynamic sealing structure of the metal lead screw (3.1) is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810936564.4A CN108648947B (en) | 2018-08-16 | 2018-08-16 | Three-station isolation grounding switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810936564.4A CN108648947B (en) | 2018-08-16 | 2018-08-16 | Three-station isolation grounding switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108648947A CN108648947A (en) | 2018-10-12 |
| CN108648947B true CN108648947B (en) | 2023-11-03 |
Family
ID=63760950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810936564.4A Active CN108648947B (en) | 2018-08-16 | 2018-08-16 | Three-station isolation grounding switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108648947B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110137024A (en) * | 2019-06-06 | 2019-08-16 | 现代重工(中国)电气有限公司 | A kind of novel high speed grounding switch |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3627940A (en) * | 1969-11-04 | 1971-12-14 | Coq Nv | Earthing switches |
| JPS6486423A (en) * | 1987-09-29 | 1989-03-31 | Toshiba Corp | Driving coupler for rectilinear reciprocating member |
| EP1245064A1 (en) * | 2000-01-03 | 2002-10-02 | Eaton Corporation | Isolator switch |
| CN2578956Y (en) * | 2002-10-08 | 2003-10-08 | 李彤 | Direct-actuated three position switch |
| CN101882527A (en) * | 2010-06-23 | 2010-11-10 | 广西中电新源电气有限公司 | Three-station isolating/grounding switch adopting floating structure and self-adaptive conductive contact |
| CN201788880U (en) * | 2010-08-27 | 2011-04-06 | 山东泰开高压开关有限公司 | Transmission device of angular disconnector |
| CN202153495U (en) * | 2011-08-02 | 2012-02-29 | 湖南丰日电源电气股份有限公司 | Solid insulating three-station isolating/grounding switch |
| CN202258973U (en) * | 2011-07-19 | 2012-05-30 | 沈阳华利能源设备制造有限公司 | Three-station disconnecting switch |
| CN202434399U (en) * | 2011-12-26 | 2012-09-12 | 沈阳华德海泰电器有限公司 | Three-position switch for clean and dry air insulated metal-enclosed switchgear |
| CN203706993U (en) * | 2014-01-14 | 2014-07-09 | 黄素兰 | Screw rod type direct drive type isolation switch |
| CN106409592A (en) * | 2016-11-14 | 2017-02-15 | 许继集团有限公司 | GIS (gas insulated metal-enclosed switchgear), three-position disconnecting switch thereof, moving contact device and moving contact |
| CN206163393U (en) * | 2016-11-24 | 2017-05-10 | 江西省拓网电气有限公司 | Isolation switch and connection structure who keeps apart static contact |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208622637U (en) * | 2018-08-16 | 2019-03-19 | 沈阳华德海泰电器有限公司 | A kind of three-station isolating grounding switch |
-
2018
- 2018-08-16 CN CN201810936564.4A patent/CN108648947B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3627940A (en) * | 1969-11-04 | 1971-12-14 | Coq Nv | Earthing switches |
| JPS6486423A (en) * | 1987-09-29 | 1989-03-31 | Toshiba Corp | Driving coupler for rectilinear reciprocating member |
| EP1245064A1 (en) * | 2000-01-03 | 2002-10-02 | Eaton Corporation | Isolator switch |
| CN2578956Y (en) * | 2002-10-08 | 2003-10-08 | 李彤 | Direct-actuated three position switch |
| CN101882527A (en) * | 2010-06-23 | 2010-11-10 | 广西中电新源电气有限公司 | Three-station isolating/grounding switch adopting floating structure and self-adaptive conductive contact |
| CN201788880U (en) * | 2010-08-27 | 2011-04-06 | 山东泰开高压开关有限公司 | Transmission device of angular disconnector |
| CN202258973U (en) * | 2011-07-19 | 2012-05-30 | 沈阳华利能源设备制造有限公司 | Three-station disconnecting switch |
| CN202153495U (en) * | 2011-08-02 | 2012-02-29 | 湖南丰日电源电气股份有限公司 | Solid insulating three-station isolating/grounding switch |
| CN202434399U (en) * | 2011-12-26 | 2012-09-12 | 沈阳华德海泰电器有限公司 | Three-position switch for clean and dry air insulated metal-enclosed switchgear |
| CN203706993U (en) * | 2014-01-14 | 2014-07-09 | 黄素兰 | Screw rod type direct drive type isolation switch |
| CN106409592A (en) * | 2016-11-14 | 2017-02-15 | 许继集团有限公司 | GIS (gas insulated metal-enclosed switchgear), three-position disconnecting switch thereof, moving contact device and moving contact |
| CN206163393U (en) * | 2016-11-24 | 2017-05-10 | 江西省拓网电气有限公司 | Isolation switch and connection structure who keeps apart static contact |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108648947A (en) | 2018-10-12 |
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