CN109326481B - External isolated circuit breaker - Google Patents
External isolated circuit breaker Download PDFInfo
- Publication number
- CN109326481B CN109326481B CN201811290115.3A CN201811290115A CN109326481B CN 109326481 B CN109326481 B CN 109326481B CN 201811290115 A CN201811290115 A CN 201811290115A CN 109326481 B CN109326481 B CN 109326481B
- Authority
- CN
- China
- Prior art keywords
- circuit breaker
- contact
- conductive
- movable contact
- movable
- 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.)
- Active
Links
- 230000003068 static effect Effects 0.000 claims abstract description 43
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052802 copper Inorganic materials 0.000 claims abstract description 11
- 239000010949 copper Substances 0.000 claims abstract description 11
- 238000002955 isolation Methods 0.000 abstract description 21
- 230000000694 effects Effects 0.000 abstract description 5
- 241000227287 Elliottia pyroliflora Species 0.000 description 12
- 238000005096 rolling process Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000002093 peripheral 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
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/54—Lever switches with blade-type contact co-operating with one or two spring-clip contacts, e.g. knife switch
-
- 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
- Elimination Of Static Electricity (AREA)
- Breakers (AREA)
Abstract
The invention relates to the technical field of isolating switches, in particular to an external isolating circuit breaker. The external isolated circuit breaker comprises a bracket, a circuit breaker body on the bracket, a movable contact knife and a static contact seat. The front end of the movable contact knife is provided with a copper sleeve which is used for being connected with a static contact seat in a conductive mode, the static contact seat is provided with a wiring part which is connected with a high-voltage wire and a static contact part which is used for being in conductive contact with the movable contact part, and the static contact part is provided with a conductive contact surface which extends along the direction tangential to the circumference of the movable contact part which rotates along with the movable contact knife. The invention solves the technical problem that the knife holder is easy to misplace with the isolation knife when the knife holder bears the tension traction of a high-voltage wire due to the clamping and assembly of the isolation knife and the knife holder in the traditional circuit breaker, thereby influencing the conductive communication effect.
Description
Technical Field
The invention relates to the technical field of isolating switches, in particular to an external isolating circuit breaker.
Background
Circuit breakers are electrical equipment often used in high voltage power distribution systems and generally include a circuit breaker body and an isolating knife set gate, the circuit breaker being operative to establish a reliable insulating gap separating the lines with a distinct break point to ensure the safety of operators and equipment. Chinese patent publication number CN106024498B, publication date 2018.03.06 discloses a vacuum circuit breaker. The vacuum circuit breaker comprises a frame, and an isolation knife set, a grounding knife set and a vacuum arc-extinguishing chamber set which are detachably arranged on the frame, wherein the isolation knife set, the grounding knife set and the vacuum arc-extinguishing chamber set are respectively driven to be opened and closed by an isolation knife set operating mechanism, a grounding knife set operating mechanism and a circuit breaker operating mechanism, the operation parts of the isolation knife set operating mechanism and the grounding knife set operating mechanism are integrated in a case, the case is detachably arranged on the frame, a switch cabinet is detachably arranged at the bottom of the case, and the operation parts of the circuit breaker operating mechanism are arranged in the switch cabinet.
However, the isolating knife of the vacuum circuit breaker adopts a parallel double-knife-arm structure, and when the isolating knife is switched on, the double-knife-arm clamps the isolating knife holder to form a power-on loop. However, a certain tension exists on the high-voltage wire, after the high-voltage wire is connected with the isolation tool apron, the tool apron is easy to shift due to the problem of the strength of the support, and when serious, the problem that the isolation tool is separated from the corresponding tool apron can occur, so that the conductive communication effect is affected.
Disclosure of Invention
The invention provides an external isolation circuit breaker, which solves the technical problem that in the prior art, when a knife holder is pulled by high-voltage wire tension, the knife holder is easy to misplace with the isolation knife due to the clamping and assembly of the isolation knife and the knife holder, so that the conductive communication effect is affected.
In order to achieve the above purpose, the technical scheme of the external isolating circuit breaker of the invention is as follows: the utility model provides an external circuit breaker that keeps apart, includes the support, is equipped with the circuit breaker body on the support, articulated on the support have with the circuit breaker body corresponds the movable contact sword of conductive connection, still be equipped with the static contact seat on the support, be equipped with wiring portion on the static contact seat for be connected with the high-voltage line, the front end of movable contact sword be equipped with be used for with the movable end contact portion of static contact seat conductive connection, be equipped with on the static contact seat be used for with the static contact portion of movable end contact portion conductive contact, the static contact portion has along the conductive contact surface that extends with the tangent direction of movable end contact portion place circumference that follows movable contact sword pivoted, this conductive contact surface orientation wiring portion arranges.
The external-partition circuit breaker has the beneficial effects that: the front ends and the rear ends of the two cutter arms are fixedly connected. When the static contact base is connected with the high-voltage wire and bears the tension of the high-voltage wire, the two cutter arms limit the movement of the static contact part, the tension of the high-voltage wire can be decomposed into two forces, one force points to the direction of the movable contact part to enable the conductive contact surface to be tightly pressed with the movable contact part, the effective contact of the movable contact cutter and the static contact base is ensured, and therefore the conductive communication effect of the circuit breaker in a closing state is ensured. And because the conductive contact surface extends along the tangential direction of the circumference of the movable end contact part, the conductive contact surface can not stop to prevent the movable end contact part from moving towards the opening direction when opening the gate, thereby ensuring normal opening of the gate.
Further, in order to reduce friction force generated when the movable contact knife and the static contact seat are closed, a conductive sleeve is assembled on the movable contact knife in a rolling manner, and the conductive sleeve is provided with an outer peripheral surface serving as the movable end contact part to be in conductive contact with the conductive contact surface.
Further, in order to facilitate assembly of the conductive sleeve, the conductive sleeve is assembled on the movable contact blade through the conductive plug pin, and the movable contact blade comprises two side blade arms which are arranged at intervals along the circumferential direction of the conductive plug pin.
Further, in order to make the resistance of the circuit breaker in a closing state as small as possible, the conductive sleeve is a copper sleeve.
Further, in order to facilitate connection of the static contact seat and the isolation support, the static contact seat is provided with two support arms, one support arm is provided with a wiring part, and the other support arm is provided with the static contact part.
Furthermore, the two support arms of the static contact seat are vertically arranged so that the whole static contact seat is in an L-shaped structure.
Further, the movable contact knife is connected with the circuit breaker body through a conductive block, the conductive block is fixedly connected with the circuit breaker body, and the movable contact knife is hinged with the conductive block.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of an external isolated circuit breaker according to the present invention;
In the figure: 1. the circuit breaker comprises a support, 2, a circuit breaker body, 3, a movable contact knife, 31, a copper bush, 32, a copper bush mounting pin, 33, a movable contact knife arm, 4, a static contact seat, 41, a static contact part, 42, a wiring part, 5, a conductive block, 6, a conductive block mounting bolt, 7, an isolation pull rod connecting pin, 8, an isolation pull rod, 9 and an isolation support.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
An embodiment of the external isolated circuit breaker of the present invention is shown in fig. 1: the external isolated circuit breaker in the embodiment comprises a bracket 1, a circuit breaker body 2, a movable contact blade 3, a static contact seat 4, a conductive block 5, a conductive block mounting bolt 6, an isolating pull rod connecting pin 7, an isolating pull rod 8 and an isolating support 9.
The support 1 divide into front end and rear end, and the lower part of the front end of support 1 and the below platform or the ground contact of circuit breaker provide the support for whole circuit breaker, and circuit breaker body 2 is installed at the front end of support 1, and the rear end of support 1 is two trapezoidally structures that extend from the front end of support 1, is provided with L type mounting bracket between two trapezoidally structures, keeps apart pillar 9 and installs on L type mounting bracket. The front end of the bracket 1 is also provided with a connecting frame corresponding to the breaker body 2, and one end of the isolation pull rod 8 is connected with the connecting frame. The circuit breaker body 2 is fixedly connected with a conductive block 5, the conductive block 5 is fixedly connected with the circuit breaker body 2 through a conductive block mounting bolt 6, a movable contact knife arm 33 is hinged to the conductive block 5, and the movable contact knife 3 comprises a copper sleeve 31, a copper sleeve mounting pin 32 and the movable contact knife arm 33. The copper bush 31 is fixed at the bottom end of the movable contact knife arm 33 through the copper bush mounting pin 32, and the static contact seat 4 comprises a static end contact part 41 and a wiring part 42, wherein the static end contact part 41 and the wiring part 42 are two support arms which are mutually perpendicular. The movable contact knife 3 is connected with the isolation pull rod 8 through the isolation pull rod connecting pin 7, and the static contact seat 4 is fixed on the isolation support 9 through bolts. When the external isolating breaker is in a closing state, the copper sleeve 31 is tangent to the static contact part 41.
When the wiring portion 42 is connected with the high-voltage wire and the circuit breaker is in a closing state, if tension exists on the high-voltage wire, the two cutter arms 33 limit the movement of the static contact portion 41, and the tension of the high-voltage wire can be decomposed into two forces, wherein one force points to the copper sleeve 31 to enable the static contact portion 41 to be tightly pressed with the copper sleeve 31, the tension of the high-voltage wire can not enable the movable contact cutter 3 to be separated from the static contact portion 41, the effective contact area of the movable contact cutter 3 and the static contact seat is guaranteed, and therefore the conductive communication effect of the circuit breaker in the closing state is guaranteed.
In this embodiment, in order to reduce the friction force generated when the movable contact blade 3 and the static contact seat 4 are closed, the movable contact blade 3 is assembled with a copper sleeve 31 in a rolling manner, and in other embodiments, the copper sleeve and the movable contact blade arm may be assembled in a non-rolling manner, for example, welded, integrally cast, etc.
In this embodiment, in order to facilitate the assembly of the copper bush 31, the copper bush 31 is assembled on the movable contact cutter arm 33 through the copper bush mounting pin 32, in other embodiments, the copper bush may be installed on the movable contact cutter arm by adopting other structures, for example, the movable contact cutter arm is of an integrated structure, the movable contact cutter arm is provided with a through hole, the copper bush is firstly placed in the through hole, the movable contact cutter arm is welded with a limiting plate for limiting the copper bush from falling out, and the copper bush cannot fall out of the movable contact cutter arm because the length of the copper bush is smaller than the distance between the limiting plates.
In this embodiment, in order to make the resistance of the circuit breaker in the closing state as small as possible, the conductive sleeve is a copper sleeve 31. Of course, in other embodiments, other conductive materials may be used for the conductive sleeve. Such as aluminum, lead, etc.
In this embodiment, further to facilitate the connection between the static contact holder 4 and the isolation pillar 9, the static contact holder 4 has two arms, one arm has a connection portion 42, and the other arm has the static contact portion 41. In other embodiments, the static contact base may also have one arm or more than two arms, and the position of the isolation support needs to be adjusted when there is only one arm in the static contact base.
In this embodiment, the angle between the wire connection portion 42 and the stationary contact portion 41 is 90 °, but in other embodiments, the angle between the wire connection portion and the stationary contact portion may be other angles, for example, 120 °, 60 °.
Claims (7)
1. The utility model provides an external circuit breaker of keeping apart, includes the support, is equipped with the circuit breaker body on the support, articulated on the support have with the circuit breaker body corresponds electrically conductive movable contact sword of being connected, still be equipped with the static contact seat on the support, be equipped with wiring portion on the static contact seat for be connected with the high-voltage line, the front end of movable contact sword is equipped with the movable end contact portion that is used for being connected with the static contact seat is electrically conductive, be equipped with on the static contact seat be used for with the static contact portion of the electrically conductive contact of movable end contact portion, its characterized in that: the stationary contact portion has a conductive contact surface extending in a direction tangential to a circumference where the movable contact portion that follows the rotation of the movable contact blade is located, the conductive contact surface being disposed toward the wiring portion.
2. The external isolating circuit breaker according to claim 1, wherein a conductive sleeve is rollably mounted on the movable contact blade, the conductive sleeve having an outer circumferential surface as the movable end contact portion to be in conductive contact with the conductive contact surface.
3. The external isolating circuit breaker of claim 2, wherein the conductive sleeve is mounted on the movable contact blade by a conductive pin, the movable contact blade including two side blade arms disposed in circumferentially opposite spaced relation along the conductive pin.
4. The external isolating circuit breaker of claim 2, wherein the conductive sleeve is a copper sleeve.
5. The external isolating circuit breaker as in any one of claims 1-4, wherein the stationary contact has two arms, one arm having a wire connection and the other arm having the stationary contact.
6. The external isolating circuit breaker as in claim 5, wherein the two arms of the stationary contact are arranged vertically such that the stationary contact is generally L-shaped.
7. The external isolating circuit breaker as in any one of claims 1-4, wherein the movable contact blade is connected to the circuit breaker body via a conductive block, the conductive block is fixedly connected to the circuit breaker body, and the movable contact blade is hinged to the conductive block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811290115.3A CN109326481B (en) | 2018-10-31 | 2018-10-31 | External isolated circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811290115.3A CN109326481B (en) | 2018-10-31 | 2018-10-31 | External isolated circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109326481A CN109326481A (en) | 2019-02-12 |
| CN109326481B true CN109326481B (en) | 2024-05-07 |
Family
ID=65260589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811290115.3A Active CN109326481B (en) | 2018-10-31 | 2018-10-31 | External isolated circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109326481B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113643927B (en) * | 2021-07-16 | 2023-08-01 | 河南华盛隆源电气有限公司 | Isolating knife and external isolating switch's circuit breaker |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100860529B1 (en) * | 2007-06-14 | 2008-09-26 | 엘에스산전 주식회사 | Air circuit breaker with closing spring automatic release device |
| CN203055762U (en) * | 2013-02-04 | 2013-07-10 | 深圳市金博联电力技术有限公司 | Isolating switch device used for solid insulation breaker ring main unit |
| CN203351482U (en) * | 2013-05-28 | 2013-12-18 | 浙江伏尔特电器有限公司 | Outdoor alternating-current 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 |
| WO2016054853A1 (en) * | 2014-10-09 | 2016-04-14 | 河南平高电气股份有限公司 | Interrupter assembly and porcelain column type sulfur hexafluoride breaker |
| WO2018076455A1 (en) * | 2016-10-31 | 2018-05-03 | 国家电网公司 | Servo-drive isolation circuit breaker |
| CN207398011U (en) * | 2017-09-15 | 2018-05-22 | 国网河北省电力公司枣强县供电分公司 | Opening and closing device for outdoor AC high voltage isolating switch |
| CN208970415U (en) * | 2018-10-31 | 2019-06-11 | 河南华盛隆源电气有限公司 | A kind of breaker of external isolation |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103608883B (en) * | 2011-06-16 | 2016-01-20 | Abb技术有限公司 | Switching device and switchgear |
-
2018
- 2018-10-31 CN CN201811290115.3A patent/CN109326481B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100860529B1 (en) * | 2007-06-14 | 2008-09-26 | 엘에스산전 주식회사 | Air circuit breaker with closing spring automatic release device |
| CN203055762U (en) * | 2013-02-04 | 2013-07-10 | 深圳市金博联电力技术有限公司 | Isolating switch device used for solid insulation breaker ring main unit |
| CN203351482U (en) * | 2013-05-28 | 2013-12-18 | 浙江伏尔特电器有限公司 | Outdoor alternating-current high-voltage isolation switch |
| WO2016054853A1 (en) * | 2014-10-09 | 2016-04-14 | 河南平高电气股份有限公司 | Interrupter assembly and porcelain column type sulfur hexafluoride breaker |
| CN204966368U (en) * | 2015-09-09 | 2016-01-13 | 山东泰开智能配电有限公司 | Novel GW9 isolator |
| WO2018076455A1 (en) * | 2016-10-31 | 2018-05-03 | 国家电网公司 | Servo-drive isolation circuit breaker |
| CN207398011U (en) * | 2017-09-15 | 2018-05-22 | 国网河北省电力公司枣强县供电分公司 | Opening and closing device for outdoor AC high voltage isolating switch |
| CN208970415U (en) * | 2018-10-31 | 2019-06-11 | 河南华盛隆源电气有限公司 | A kind of breaker of external isolation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109326481A (en) | 2019-02-12 |
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