CN110060904B - Novel isolating switch contact structure - Google Patents
Novel isolating switch contact structure Download PDFInfo
- Publication number
- CN110060904B CN110060904B CN201910493334.XA CN201910493334A CN110060904B CN 110060904 B CN110060904 B CN 110060904B CN 201910493334 A CN201910493334 A CN 201910493334A CN 110060904 B CN110060904 B CN 110060904B
- Authority
- CN
- China
- Prior art keywords
- contact
- static
- insulating seat
- main contact
- static arc
- 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
- 230000003068 static effect Effects 0.000 claims abstract description 54
- 230000005684 electric field Effects 0.000 claims abstract description 6
- 230000000712 assembly Effects 0.000 claims abstract description 4
- 238000000429 assembly Methods 0.000 claims abstract description 4
- 230000015556 catabolic process Effects 0.000 abstract description 3
- 238000010891 electric arc Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000001052 transient 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
- H01H31/023—Base and stationary 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
- H01H31/02—Details
- H01H31/026—Movable parts and contacts mounted thereon
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The novel isolating switch contact structure comprises an insulating seat, a hollow arc-shaped shielding cover, a static main contact and a static arc contact, wherein the hollow arc-shaped shielding cover is connected with the outer wall of the insulating seat, a limit nail is arranged at the axle center of the insulating seat, a spring is sleeved at the right end of the limit nail, one end of the spring is connected with the insulating seat, and the other end of the spring is abutted to the tail end of the static arc contact; the head of the static arc contact is arched, and the tail of the static arc contact is provided with a blind hole matched with the limit nail; and a plurality of static main contact assemblies are symmetrically arranged at the left end of the insulating seat. The invention can limit the electric arc between the moving contact and the static arc contact when the switch is opened, and meanwhile, because the static arc contact and the shielding cover are in fit with the appearance of the electric field and are approximately and evenly distributed, the frequency and the times of occurrence of heavy breakdown between the moving contact and the static arc contact can be reduced, and the probability of generating VFTO is reduced.
Description
Technical Field
The invention relates to the technical field of isolating switches, in particular to a novel isolating switch contact structure.
Background
Destructive discharge to ground may occur when the disconnector of a gas-insulated metal-enclosed switchgear opens and closes small capacitive currents, for example by switching on or off an empty bus (tube) section or a parallel capacitor of a circuit breaker with the disconnector. In recent years, through worldwide investigation and the complexity of very fast transient overvoltage phenomena, which occur as the disconnectors of gas-insulated metal-enclosed switchgear fulfil the inherent function of capacitive current switching, there is a great deal of knowledge. From this it can be concluded that: proper disconnector design is critical to avoid damaging discharges to ground. Therefore, there is a need to design a novel isolating switch contact structure to solve the above problems.
Disclosure of Invention
The invention aims to provide a novel isolating switch contact structure which has excellent anti-seismic performance and is convenient to install and maintain.
In order to achieve the above purpose, the specific technical scheme adopted by the invention is as follows:
A novel isolating switch contact structure comprises an insulating seat; the upper end and the lower end of the insulating seat are symmetrically connected with shielding covers, the shielding covers are hollow arc-shaped, a limiting nail is arranged at the axle center of the insulating seat, a spring is sleeved at the right end of the limiting nail, one end of the spring is connected with the insulating seat, and the other end of the spring is abutted to the tail end of the static arc contact; the head of the static arc contact is arched, and the tail of the static arc contact is provided with a blind hole matched with the limit nail; the left end of the insulating seat is symmetrically provided with a plurality of fixed main contact assemblies, and each fixed main contact assembly comprises a limiting plate, a fixed main contact, a V-shaped elastic sheet and a fastening screw; the limiting plate is connected with the left end face of the insulating seat, the tail part of the static main contact is connected with the outer wall of the insulating seat, the static main contact is arranged on the outer surfaces of the left ends of the limiting plate and the insulating seat, the head part of the limiting plate is provided with a buckle, and the middle part of the static main contact is provided with a clamping groove matched with the buckle; the head of the fastening screw penetrates through the fixed main contact and is screwed on the limiting plate, and the tail of the fastening screw is connected with the outer wall of the fixed main contact through the V-shaped elastic sheet; the moving contact and the static arc contact are coaxially arranged.
In order to achieve better isolation performance, the shielding cover and the static arc contact are preferably in an approximately distributed shape fitting the electric field.
Preferably, the left end of the insulating seat is provided with a convex buckle, and the upper end of the stationary main contact is provided with a groove matched with the convex buckle.
The beneficial effects are that: compared with the prior art, when the movable contact is in the closing position, the movable contact is fully contacted with the static main contact, so that the long-time current passing capability of rated current is ensured, and meanwhile, the movable contact presses down the static arc contact.
When the movable contact is positioned at the opening position, the movable contact is separated from the static main contact and the static arc contact, the static arc contact and the shielding cover are arranged on the same surface, so that the electric field is ensured to be uniform, and the insulation strength after opening is improved.
When the switch is just opened, the moving contact is separated from the static main contact, and the moving contact is separated from the static arc contact, so that the electric arc is limited between the moving contact and the static arc contact during the switch opening, and meanwhile, because the static arc contact and the appearance of the shielding case are approximately uniformly distributed in a fitting way, the occurrence frequency and the number of heavy breakdown between the moving contact and the static arc contact can be reduced, and the occurrence probability of VFTO is reduced.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of a just-opened state;
FIG. 3 is a schematic diagram of the opening state.
Detailed Description
The present invention will be further described in detail with reference to the following examples and drawings for the purpose of enhancing the understanding of the present invention, which examples are provided for the purpose of illustrating the present invention only and are not to be construed as limiting the scope of the present invention.
Referring to figures 1-3 of the drawings,
A novel isolating switch contact structure comprises an insulating seat 1; the upper end and the lower end of the insulating seat 1 are symmetrically connected with shielding cases 2, the shielding cases 2 are hollow arcs, a limiting nail 3 is arranged at the axle center of the insulating seat, a spring 5 is sleeved at the right end of the limiting nail, one end of the spring is connected with the insulating seat 1, and the other end of the spring is abutted against the tail end of a static arc contact 4; the head of the static arc contact 4 is arched, and the tail of the static arc contact is provided with a blind hole matched with the limit nail; the left end of the insulating seat 1 is symmetrically provided with a plurality of fixed main contact assemblies, wherein each fixed main contact assembly comprises a limiting plate 6, a fixed main contact 7,V-type elastic sheet 8 and a fastening screw 9; the limiting plate 6 is connected with the left end face of the insulating seat 1, the tail part of the static main contact 7 is connected with the outer wall of the insulating seat 1, the static main contact 7 is arranged on the outer surfaces of the left ends of the limiting plate 6 and the insulating seat 1, the head part of the limiting plate 6 is provided with a buckle, and the middle part of the static main contact is provided with a clamping groove matched with the buckle; the head of the fastening screw 9 passes through the fixed main contact and is screwed on the limiting plate, and the tail of the fastening screw is also connected with the outer wall of the fixed main contact through a V-shaped elastic sheet; the moving contact 10 and the static arc contact 4 are coaxially arranged.
In order to achieve better isolation performance, the shielding cover and the static arc contact are preferably in an approximately distributed shape fitting the electric field.
Preferably, the left end of the insulating seat is provided with a convex buckle, and the upper end of the stationary main contact is provided with a groove matched with the convex buckle.
When the movable contact is in a closing position, the movable contact is fully contacted with the static main contact, so that the long-time current passing capability of rated current is ensured, and meanwhile, the movable contact presses down the static arc contact.
When the movable contact is positioned at the opening position, the movable contact is separated from the static main contact and the static arc contact, the static arc contact and the shielding cover are arranged on the same surface, so that the electric field is ensured to be uniform, and the insulation strength after opening is improved.
When the switch is just opened, the moving contact is separated from the static main contact, and the moving contact is separated from the static arc contact, so that the electric arc is limited between the moving contact and the static arc contact during the switch opening, and meanwhile, because the static arc contact and the appearance of the shielding case are approximately uniformly distributed in a fitting way, the occurrence frequency and the number of heavy breakdown between the moving contact and the static arc contact can be reduced, and the occurrence probability of VFTO is reduced.
While the preferred embodiments and examples of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments and examples, and various changes may be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Claims (1)
1. The novel isolating switch contact structure is characterized by comprising an insulating seat and a moving contact; the upper end and the lower end of the insulating seat are symmetrically connected with shielding covers, the shielding covers are hollow arc-shaped, a limiting nail is arranged at the axle center of the insulating seat, a spring is sleeved at the right end of the limiting nail, one end of the spring is connected with the insulating seat, and the other end of the spring is abutted to the tail end of the static arc contact; the head of the static arc contact is arched, and the tail of the static arc contact is provided with a blind hole matched with the limit nail; the left end of the insulating seat is symmetrically provided with a plurality of fixed main contact assemblies, and each fixed main contact assembly comprises a limiting plate, a fixed main contact, a V-shaped elastic sheet and a fastening screw; the limiting plate is connected with the left end face of the insulating seat, the tail part of the static main contact is connected with the outer wall of the insulating seat, the static main contact is arranged on the outer surfaces of the left ends of the limiting plate and the insulating seat, the head part of the limiting plate is provided with a buckle, and the middle part of the static main contact is provided with a clamping groove matched with the buckle; the head of the fastening screw penetrates through the fixed main contact and is screwed on the limiting plate, and the tail of the fastening screw is connected with the outer wall of the fixed main contact through the V-shaped elastic sheet; the moving contact and the static arc contact are coaxially arranged;
The shielding cover and the static arc contact are approximately distributed in the shape of fitting electric field, the left end of the insulating seat is provided with a convex buckle, and the upper end of the static main contact is provided with a groove matched with the convex buckle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910493334.XA CN110060904B (en) | 2019-06-06 | 2019-06-06 | Novel isolating switch contact structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910493334.XA CN110060904B (en) | 2019-06-06 | 2019-06-06 | Novel isolating switch contact structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110060904A CN110060904A (en) | 2019-07-26 |
| CN110060904B true CN110060904B (en) | 2024-04-19 |
Family
ID=67325630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910493334.XA Active CN110060904B (en) | 2019-06-06 | 2019-06-06 | Novel isolating switch contact structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110060904B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117995593B (en) * | 2024-02-22 | 2024-09-03 | 正泰电气股份有限公司 | Breaking device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102306559A (en) * | 2011-09-02 | 2012-01-04 | 平高集团有限公司 | Movable and static contact connection assembly and high-voltage isolation grounding switch |
| CN102403160A (en) * | 2011-11-29 | 2012-04-04 | 浙江开关厂有限公司 | Quick three working position isolation switch |
| WO2015043460A1 (en) * | 2013-09-24 | 2015-04-02 | 国家电网公司 | High-speed grounding switch and grounding switch assembly unit composed thereof |
| CN104701109A (en) * | 2015-03-23 | 2015-06-10 | 乐清野岛机电有限公司 | Contact system of circuit breaker |
| CN205789759U (en) * | 2016-05-31 | 2016-12-07 | 浙江正泰电器股份有限公司 | The auxiliary contact mounting structure of A.C. contactor |
| CN209804526U (en) * | 2019-06-06 | 2019-12-17 | 现代重工(中国)电气有限公司 | Novel isolating switch contact structure |
-
2019
- 2019-06-06 CN CN201910493334.XA patent/CN110060904B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102306559A (en) * | 2011-09-02 | 2012-01-04 | 平高集团有限公司 | Movable and static contact connection assembly and high-voltage isolation grounding switch |
| CN102403160A (en) * | 2011-11-29 | 2012-04-04 | 浙江开关厂有限公司 | Quick three working position isolation switch |
| WO2015043460A1 (en) * | 2013-09-24 | 2015-04-02 | 国家电网公司 | High-speed grounding switch and grounding switch assembly unit composed thereof |
| CN104701109A (en) * | 2015-03-23 | 2015-06-10 | 乐清野岛机电有限公司 | Contact system of circuit breaker |
| CN205789759U (en) * | 2016-05-31 | 2016-12-07 | 浙江正泰电器股份有限公司 | The auxiliary contact mounting structure of A.C. contactor |
| CN209804526U (en) * | 2019-06-06 | 2019-12-17 | 现代重工(中国)电气有限公司 | Novel isolating switch contact structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110060904A (en) | 2019-07-26 |
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