CN107706033B - Special isolating switch for transformer - Google Patents
Special isolating switch for transformer Download PDFInfo
- Publication number
- CN107706033B CN107706033B CN201710952603.5A CN201710952603A CN107706033B CN 107706033 B CN107706033 B CN 107706033B CN 201710952603 A CN201710952603 A CN 201710952603A CN 107706033 B CN107706033 B CN 107706033B
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- Prior art keywords
- contact
- isolating switch
- switch
- spring
- wire inlet
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
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- 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
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- Tumbler Switches (AREA)
- Push-Button Switches (AREA)
Abstract
The invention provides a special isolating switch for a transformer, which comprises an isolating switch base, wherein a ceramic insulating seat, an insulator and a contact seat are sequentially arranged on the isolating switch base, an L-shaped wiring board, a wiring board and a disconnecting link are arranged on the contact seat, a guide slope surface and a wire inlet notch are arranged on the wiring board, an elastic contact mechanism is arranged on the disconnecting link, when current needs to be switched on, the disconnecting link is pressed downwards, and a contact of the disconnecting link moves along the guide slope surface under the action of a sliding groove and a first spring until the contact is scratched into the wire inlet notch; when the current needs to be cut off, the reverse is true. Compared with the old-fashioned isolating switch, the disconnecting link and the wire inlet plate of the embodiment always keep certain contact pressure, and the electrical contact of the disconnecting link and the wire inlet plate is more stable; the process of breaking the current is also smooth.
Description
Technical Field
The invention relates to an isolating switch, in particular to an isolating switch special for a transformer.
Background
In the operation of the power system, the transformer is one of the important devices of the power system, and the capability of stable operation is very critical.
The transformer isolating switch is used as important current breaking equipment of a transformer, and the importance of the transformer isolating switch is obvious, the electrical contact stability between a switch-off knife and an incoming line board of the old isolating switch used at present is poor, after the transformer isolating switch is used for a period of time, the contact between the switch-off knife and the incoming line board can be loosened, and in the serious case, the transformer can be disconnected without reasons.
Disclosure of Invention
The invention provides the isolating switch special for the transformer, which has the characteristic of intelligent temperature control and improves the safety of a switch cabinet.
The specific technical scheme is as follows:
a special isolating switch for a transformer comprises an isolating switch base and is characterized in that the isolating switch base is groove-shaped, the lower end of the isolating switch base is open, 2 ceramic insulating seats are symmetrically arranged at two ends of the upper end face of the isolating switch base, 2 symmetrical columnar insulators are arranged at the upper ends of the 2 ceramic insulating seats, contact seats are arranged at the upper ends of the 2 columnar insulators and comprise connecting plates and wiring boards, gaskets are arranged between the connecting plates and the columnar insulators, the wiring boards are L-shaped, the upper half parts of the wiring boards are horizontal, the lower half parts of the wiring boards are vertical, the lower end parts of the wiring boards are fixedly connected with the connecting plates, and wiring terminals are arranged on the upper half parts of the wiring boards;
the 2 contact seats on the 2 columnar insulators are divided into a first contact seat and a second contact seat, the first contact seat is provided with a wire inlet plate, the second contact seat is provided with a switch knife, the wire inlet plate is provided with a guide slope surface and a wire inlet notch, the guide slope surface is positioned above the wire inlet notch, the guide slope surface and the wire inlet notch are cylindrical, the right end of the switch knife is hinged with the second contact seat, the left end of the switch knife is provided with an elastic contact mechanism, the elastic contact mechanism comprises a first spring, a second spring, a spring rod, a contact and a contact shaft rod, the spring rod is fixedly connected with the switch knife, the contact is clamped between chutes on two sides of the switch knife through the contact shaft rod, the outer wall of the contact is provided with a spring seat, two ends of the first spring are respectively connected with the spring rod and the spring seat and are always in a compression state, the second spring is sleeved at one end of the contact shaft, and fixed by a nut, and two ends of the second spring are respectively pressed on the nut and the switch knife.
In the isolating switch special for the transformer, an N-shaped reinforcing rib is arranged in the middle of the switch knife.
In the isolating switch special for the transformer, the ceramic insulating seat is provided with the grounding knife.
In the isolating switch special for the transformer, a limiting block for limiting the opening and closing angle of the switch knife is arranged between the switch knife on the second contact seat and the wiring board.
The invention has the beneficial effects that:
the invention provides a special isolating switch for a transformer, which comprises an isolating switch base, wherein a ceramic insulating seat, a columnar insulator and a contact seat are sequentially arranged on the isolating switch base, an L-shaped wiring board, a wiring board and a disconnecting link are arranged on the contact seat, a guide slope surface and a wire inlet notch are arranged on the wiring board, an elastic contact mechanism is arranged on the disconnecting link, when current needs to be switched on, the disconnecting link is pressed downwards, and a contact of the disconnecting link moves along the guide slope surface under the action of a sliding groove and a first spring until the contact is scratched into the wire inlet notch; when the current needs to be cut off, the reverse is true. Compared with the old-fashioned isolating switch, the disconnecting link and the wire inlet plate of the embodiment always keep certain contact pressure, and the electrical contact of the disconnecting link and the wire inlet plate is more stable; the process of breaking the current is also smooth.
Drawings
FIG. 1 is a schematic illustration of the present invention.
Figure 2 side view of a disconnector base.
FIG. 3 is a schematic view of a knife switch.
Detailed Description
In order to make the technical scheme of the invention clearer and clearer, the invention is further described with reference to the accompanying drawings, and any scheme obtained by carrying out equivalent replacement and conventional reasoning on the technical characteristics of the technical scheme of the invention falls into the protection scope of the invention.
A special isolating switch for a transformer comprises an isolating switch base 1 and is characterized in that the isolating switch base 1 is groove-shaped, the lower end of the isolating switch base is open, 2 ceramic insulating seats 2 are symmetrically arranged at two ends of the upper end surface of the isolating switch base 1, 2 column insulators 3 are symmetrically arranged at the upper ends of the 2 ceramic insulating seats 2, contact seats 4 are arranged at the upper ends of the 2 column insulators 3, each contact seat 4 comprises a connecting plate 41 and a wiring board 42, the connecting plate 41 is horizontally arranged, a gasket 43 is arranged between the connecting plate 41 and the column insulators 3, the wiring board 42 is L-shaped, the upper half part of the wiring board is horizontal, the lower half part of the wiring board 42 is vertically arranged, the lower end part of the wiring board 42 is fixedly connected with the connecting plate 41, and a wiring terminal 44;
the 2 contact seats 4 on the 2 columnar insulators 3 are divided into a first contact seat 5 and a second contact seat 6, a wire inlet plate 7 is arranged on the first contact seat 5, a switch blade 8 is arranged on the second contact seat 6, a guide slope 71 and a wire inlet notch 72 are arranged on the wire inlet plate 7, the guide slope 71 is arranged above the wire inlet notch 72, the guide slope 71 and the wire inlet notch 72 are cylindrical, the right end of the switch blade 8 is hinged with the second contact seat 6, an elastic contact mechanism is arranged on the left end of the switch blade 8 and comprises a first spring 9, a second spring 10, a spring rod 11, a contact 12 and a contact shaft rod 13, the spring rod 11 is fixedly connected with the switch blade 8, the contact 12 is clamped between sliding grooves 14 on two sides of the switch blade 8 through the contact shaft rod 13, a spring seat 15 is arranged on the outer wall of the contact 12, and two ends of the first spring 9 are respectively connected with the spring rod 11, The spring seats 15 are connected and are always in a compressed state, the second spring 10 is sleeved at one end of the contact shaft rod 13 and is fixed through a nut, and two ends of the second spring 10 are respectively pressed on the nut and the opening knife 8.
In the isolating switch special for the transformer, an N-shaped reinforcing rib 16 is arranged in the middle of the switch blade 8.
In the above isolating switch special for the transformer, the ceramic insulating base 2 is provided with the grounding knife 17.
In the isolating switch special for the transformer, a limit block 18 for limiting the opening and closing angle of the disconnecting link 8 is arranged between the disconnecting link 8 on the second contact seat 6 and the wiring board 42.
In the embodiment, when the current needs to be switched on, the switch knife is pressed down, and the contact of the switch knife moves along the guide slope surface under the action of the chute and the first spring until the contact is scratched into the slot of the wire inlet; when the current needs to be cut off, the reverse is true. Compared with the old-fashioned isolating switch, the disconnecting link and the wire inlet plate of the embodiment always keep certain contact pressure, and the electrical contact of the disconnecting link and the wire inlet plate is more stable; the process of breaking the current is also smooth.
Claims (4)
1. A special isolating switch for a transformer comprises an isolating switch base and is characterized in that the isolating switch base is groove-shaped, the lower end of the isolating switch base is open, 2 ceramic insulating seats are symmetrically arranged at two ends of the upper end face of the isolating switch base, 2 symmetrical columnar insulators are arranged at the upper ends of the 2 ceramic insulating seats, contact seats are arranged at the upper ends of the 2 columnar insulators and comprise connecting plates and wiring boards, gaskets are arranged between the connecting plates and the columnar insulators, the wiring boards are L-shaped, the upper half parts of the wiring boards are horizontal, the lower half parts of the wiring boards are vertical, the lower end parts of the wiring boards are fixedly connected with the connecting plates, and wiring terminals are arranged on the upper half parts of the wiring boards;
the 2 contact seats are positioned on the 2 columnar insulators and are divided into a first contact seat and a second contact seat, a wire inlet plate is arranged on the first contact seat, a switch knife is arranged on the second contact seat, a guide slope surface and a wire inlet notch are arranged on the wire inlet plate, the guide slope surface is positioned above the wire inlet notch, the guide slope surface and the wire inlet notch are cylindrical, the right end of the switch knife is hinged with the second contact seat, an elastic contact mechanism is arranged at the left end of the switch knife and comprises a first spring, a second spring, a spring rod, a contact and a contact shaft rod, the spring rod is fixedly connected with the switch knife, the contact is clamped between sliding grooves at two sides of the switch knife through the contact shaft rod, a spring seat is arranged on the outer wall of the contact, two ends of the first spring are respectively connected with the spring rod and the spring seat and are always in a compression state, the second spring is sleeved at one end of the contact shaft, and fixed by a nut, and two ends of the second spring are respectively pressed on the nut and the switch knife.
2. The isolating switch special for the transformer as claimed in claim 1, wherein an N-shaped reinforcing rib is arranged in the middle part of the switch blade.
3. The isolating switch special for the transformer as claimed in claim 1, wherein the ceramic insulating base is provided with a grounding knife.
4. The isolating switch special for the transformer as claimed in claim 1, wherein a limiting block for limiting the opening and closing angle of the disconnecting switch is arranged between the disconnecting switch on the second contact block and the wiring board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710952603.5A CN107706033B (en) | 2017-10-13 | 2017-10-13 | Special isolating switch for transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710952603.5A CN107706033B (en) | 2017-10-13 | 2017-10-13 | Special isolating switch for transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107706033A CN107706033A (en) | 2018-02-16 |
| CN107706033B true CN107706033B (en) | 2020-04-10 |
Family
ID=61184108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710952603.5A Active CN107706033B (en) | 2017-10-13 | 2017-10-13 | Special isolating switch for transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107706033B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021159334A1 (en) * | 2020-02-12 | 2021-08-19 | Abb Power Grids Switzerland Ag | Balance spring assembly for disconnector |
| CN111627742B (en) * | 2020-05-27 | 2022-11-18 | 固力发电气有限公司 | High-voltage load isolating switch |
| CN111952100A (en) * | 2020-07-20 | 2020-11-17 | 广东电网有限责任公司 | Disconnecting switch adapter |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2737050A1 (en) * | 1977-08-17 | 1979-03-01 | Bbc Brown Boveri & Cie | CONTACT DEVICE |
| CN201985012U (en) * | 2010-11-08 | 2011-09-21 | 林志艺 | Edge structure of alternating current (AC) high voltage isolator |
| CN203312131U (en) * | 2013-06-18 | 2013-11-27 | 浙江麦格电气有限公司 | High voltage isolation switch |
| CN204966368U (en) * | 2015-09-09 | 2016-01-13 | 山东泰开智能配电有限公司 | Novel GW9 isolator |
| CN205004241U (en) * | 2015-09-16 | 2016-01-27 | 湖南天鹰隔离开关有限公司 | Isolating switch |
| CN205595219U (en) * | 2016-05-12 | 2016-09-21 | 国网安徽省电力公司检修公司 | Can be at remote control isolator of narrow and small space work |
| CN207367858U (en) * | 2017-10-13 | 2018-05-15 | 镇江市丹高电器有限公司 | A kind of transformer isolating switch special |
-
2017
- 2017-10-13 CN CN201710952603.5A patent/CN107706033B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2737050A1 (en) * | 1977-08-17 | 1979-03-01 | Bbc Brown Boveri & Cie | CONTACT DEVICE |
| CN201985012U (en) * | 2010-11-08 | 2011-09-21 | 林志艺 | Edge structure of alternating current (AC) high voltage isolator |
| CN203312131U (en) * | 2013-06-18 | 2013-11-27 | 浙江麦格电气有限公司 | High voltage isolation switch |
| CN204966368U (en) * | 2015-09-09 | 2016-01-13 | 山东泰开智能配电有限公司 | Novel GW9 isolator |
| CN205004241U (en) * | 2015-09-16 | 2016-01-27 | 湖南天鹰隔离开关有限公司 | Isolating switch |
| CN205595219U (en) * | 2016-05-12 | 2016-09-21 | 国网安徽省电力公司检修公司 | Can be at remote control isolator of narrow and small space work |
| CN207367858U (en) * | 2017-10-13 | 2018-05-15 | 镇江市丹高电器有限公司 | A kind of transformer isolating switch special |
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| Publication number | Publication date |
|---|---|
| CN107706033A (en) | 2018-02-16 |
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