CN110718415A - Vacuum circuit breaker - Google Patents
Vacuum circuit breaker Download PDFInfo
- Publication number
- CN110718415A CN110718415A CN201810765526.7A CN201810765526A CN110718415A CN 110718415 A CN110718415 A CN 110718415A CN 201810765526 A CN201810765526 A CN 201810765526A CN 110718415 A CN110718415 A CN 110718415A
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- Prior art keywords
- spring
- cylinder
- barrel
- joint
- conductive
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- 238000007906 compression Methods 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims 4
- 235000017491 Bambusa tulda Nutrition 0.000 claims 4
- 241001330002 Bambuseae Species 0.000 claims 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims 4
- 239000011425 bamboo Substances 0.000 claims 4
- 238000000034 method Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The present invention relates to a vacuum circuit breaker. The vacuum circuit breaker comprises a movable end conducting rod and a conductive supporting cylinder, wherein a spring assembly used for driving the movable end conducting rod is arranged in the conductive supporting cylinder, the spring assembly comprises a spring cylinder, the spring cylinder is fixedly connected with the movable end conducting rod, and the spring cylinder is assembled in the conductive supporting cylinder in a guiding mode. Because the spring assembly comprises the spring cylinder, the spring cylinder is assembled in the conductive supporting cylinder in a guiding manner, the spring cylinder cannot shake in the switching-on and switching-off process of the vacuum circuit breaker, and the switching-on and switching-off stability of the vacuum circuit breaker is ensured.
Description
Technical Field
The present invention relates to a vacuum circuit breaker.
Background
At present, a vacuum circuit breaker takes vacuum as an arc extinguishing medium and an insulating medium between contacts after arc extinguishing, has the advantages of small volume, light weight, suitability for frequent operation and difficulty in maintenance of arc extinguishing, and is popularized in a power distribution network. In the actual structure of the vacuum circuit breaker, the moving contact and the static contact generally adopt a butt-joint type contact mode, and when the vacuum arc-extinguishing chamber is in a working state, most of the contact closing maintaining springs provide contact pressure for the moving contact and the static contact, so that good electric contact is maintained between the moving contact and the static contact. In order to ensure that the moving contact has enough force to resist the electrodynamic force and not repel when the moving contact is not contacted with the static contact and is subjected to pre-breakdown in the closing process, even if the vacuum circuit breaker is positioned at the opening position, the contact closing holding spring is designed with a certain pre-compression amount, namely a pre-compression force; the contact pressure between the contacts is gradually increased along with the advance of the contact stroke, when the contact stroke is ended, the contact pressure reaches a preset value, and when the movable contact and the fixed contact are in contact, the contact pressure is suddenly increased to a pre-pressure value, so that the electric repulsion is resisted, the contact is in a good state initially, and the switching-on bounce is prevented.
Chinese patent with publication number CN104064397B and publication date 2018.01.05 discloses a waist-supported rotary type voltage-sharing belt grounding shielding high-voltage vacuum arc-extinguishing chamber solid-sealed polar pole, which comprises a conductive seat, a vacuum arc-extinguishing chamber, a conductive cylinder, a rotary movable contact finger, a sliding spring contact finger and a direct-acting disc spring cylinder combined rod piece, wherein the direct-acting disc spring combined rod piece is a spring assembly, and the spring assembly is arranged inside the conductive cylinder and is fixedly connected with the movable conductive rod of the vacuum arc-extinguishing chamber.
Chinese patent No. CN206331960U, publication No. 2017.07.14, discloses an indoor handcart type heavy current circuit breaker with chimney effect, which includes a conductive tube, a vacuum arc-extinguishing chamber, and a driving disc spring rod device for driving a moving end conductive rod, the driving disc spring rod device is a spring assembly, the spring assembly is disposed in the conductive tube, the moving end conductive rod is disposed in the vacuum arc-extinguishing chamber, and the moving end conductive rod and the spring assembly ensure reliability of electrical connection.
However, a circumferential interval is formed between the spring assembly and the conductive tube of the circuit breaker, and when the spring assembly drives the movable end conductive rod to move, the disk spring rod driving device is easy to shake, so that the switching-on stability cannot be ensured.
Disclosure of Invention
The invention aims to provide a vacuum circuit breaker, which solves the problems that a contact driving disc spring rod device of the vacuum circuit breaker in the prior art is easy to shake and the stability of closing can not be ensured.
In order to achieve the purpose, the technical scheme of the vacuum circuit breaker is as follows: the vacuum circuit breaker comprises a movable end conducting rod and a conductive supporting cylinder, wherein a spring assembly used for driving the movable end conducting rod is arranged in the conductive supporting cylinder, the spring assembly comprises a spring cylinder, the spring cylinder is fixedly connected with the movable end conducting rod, and the spring cylinder is assembled in the conductive supporting cylinder in a guiding mode.
The beneficial effects are as follows: because the spring assembly comprises the spring cylinder, the spring cylinder is assembled in the conductive supporting cylinder in a guiding manner, the spring cylinder cannot shake in the switching-on and switching-off process of the vacuum circuit breaker, and the switching-on and switching-off stability of the vacuum circuit breaker is ensured.
The spring cylinder is provided with a large-diameter end matched with the guide cylinder of the conductive support cylinder.
The beneficial effects are as follows: the assembly mode only needs to ensure the assembly precision of the large-diameter end of the spring cylinder and the conductive support cylinder, and the processing difficulty of the spring cylinder is reduced.
The part of the spring cylinder, which is used for being in guide fit with the conductive support cylinder, is in guide fit with the conductive support cylinder through the spring cylinder guide ring.
The spring barrel is internally provided with a joint which is used for being in transmission connection with the insulating pull rod, the joint is provided with a stopping step which is used for pressing the spring to the barrel bottom of the spring barrel, and the large-diameter end of the spring barrel is provided with a stopping piece which is matched with the stopping step in a stopping way along the axial direction.
The stop piece is a nut which is connected to the spring barrel through threads, the joint is assembled in the nut in a guiding mode, and a joint guiding ring is arranged between the joint and the nut.
The joint is of a round shaft structure, one end, far away from the bottom of the spring barrel, of the spring is sleeved on the joint, and the stopping step is formed by a shaft shoulder arranged on the joint.
The beneficial effects are as follows: the stopping step is formed by a shaft shoulder arranged on the joint, and the joint plays a role in guiding the spring, so that the compression force generated by the spring in the compression process is always parallel to the motion direction of the movable end conducting rod.
A contact seat is arranged between the movable end conductive rod and the spring barrel, the contact seat is sleeved on the movable end conductive rod, a ring platform is arranged on the outer peripheral surface of the movable end conductive rod, and the contact seat is fixed on the ring platform in a compression joint mode through the spring barrel.
The contact seat is matched with the conductive supporting cylinder in a guiding way.
A groove is formed in the contact seat, and one end, far away from the large-diameter end, of the spring barrel is assembled in the groove.
The spring barrel is characterized in that an annular boss parallel to the axis of the spring barrel and protruding into the spring barrel is arranged at the barrel bottom of the spring barrel, a spring is arranged in the spring barrel, and the spring is sleeved on the annular boss.
The beneficial effects are as follows: the annular boss has a guiding effect on the spring, so that the compression force generated by the spring in the compression process is always parallel to the movement direction of the movable end conducting rod.
Drawings
Fig. 1 is a schematic structural view of embodiment 1 of a vacuum circuit breaker of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
fig. 3 is a schematic structural diagram of embodiment 4 of the vacuum circuit breaker of the present invention.
Description of reference numerals: 1. a vacuum arc-extinguishing chamber; 2. a conductive contact finger; 3. a joint guide ring; 4. a conductive support cylinder; 5. an insulating pull rod; 6. a contact seat; 7. a movable end conducting rod; 8. a shaft shoulder; 9. a nut; 10. a spring case; 11. a spring; 12. a nut; 13. a joint; 14. an annular flange; 15. a contact seat guide ring; 16. spring case guide ring.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
Embodiment 1 of the vacuum circuit breaker of the present invention, as shown in fig. 1 to 2, the vacuum circuit breaker includes a vacuum arc-extinguishing chamber 1, a moving end conductive rod 7 with a moving contact, a stationary end conductive rod with a stationary contact, a conductive support cylinder 4 and an insulating pull rod 5, a contact base 6 is installed in the conductive support cylinder 4 in a guiding manner, a conductive contact finger 2 is arranged between the contact base 6 and the conductive support cylinder 4, the conductive contact finger 2 plays a conductive role, an annular groove is arranged on a contact surface between the contact base 6 and the conductive support cylinder 4, and a contact base guide ring 15 is installed in the annular groove.
In this embodiment, a spring assembly is disposed in the conductive support tube 4, the spring assembly includes a spring tube 10 and a spring 11 disposed in the spring tube 10, a tube bottom is disposed at one end of the spring tube 10 close to the movable-end conductive rod 7, a through hole is disposed on the tube bottom for the movable-end conductive rod 7 to pass through, the movable-end conductive rod 7 passes through the through hole and extends into the spring tube 10, a stop structure is disposed on the movable-end conductive rod 7 and is axially stop-fitted with the tube bottom of the spring tube 10, one end of the movable-end conductive rod 7 extending into the spring tube 10 presses the spring tube 10 against the stop structure through a nut 9, and a gasket is disposed on a pressure contact surface between the nut 9 and the spring tube 10.
In this embodiment, an annular boss protruding into the spring barrel 10 in parallel with the axis of the spring barrel 10 is disposed on the barrel bottom of the spring barrel 10, and the spring 11 is sleeved on the annular boss. The outer peripheral surface of the spring case 10 is provided with elongated holes at intervals along the circumferential direction of the spring case 10.
In this embodiment, a joint 13 connected to the insulating rod 5 in a driving manner is disposed in the spring barrel 10, the joint 13 is provided with a stopping step for pressing the spring 11 against the barrel bottom of the spring barrel 10, and a stopping member axially matched with the stopping step is disposed at an end of the spring barrel 10 away from the barrel bottom. The joint 13 is a round shaft structure, and one end of the spring 11, which is far away from the movable end conducting rod 7, is sleeved on the joint 13. The stop step is formed by a shoulder 8 provided on the joint 13. The stopping piece is a nut 12 connected to the spring barrel 10 through threads, a guide hole for guiding and assembling the joint 13 is formed in the nut 12, an annular groove is formed in the hole wall of the guide hole, and the joint guide ring 3 is installed in the annular groove.
In this embodiment, the stopping structure includes a ring platform disposed on the movable end conductive rod 7 and a contact seat 6 sleeved on the movable end conductive rod 7, and the contact seat 6 is pressed and fixed on the ring platform by the spring barrel 10. The spring cylinder 10 is assembled in the conductive support cylinder 4 in a guiding mode, a groove is formed in the contact seat 6, the cylinder bottom of the spring cylinder 10 is assembled in the groove, one end, far away from the cylinder bottom, of the spring cylinder 10 is matched with the inner wall of the conductive support cylinder 4 in a guiding mode, an annular groove is formed in the contact surface of the spring cylinder 10 and the conductive support cylinder 4, and a spring cylinder guide ring 16 is installed in the annular groove.
When the contact closing maintaining spring assembly of the vacuum circuit breaker is assembled, one end, far away from a moving contact, of a moving end conducting rod 7 extends into a spring barrel 10, the barrel bottom of the spring barrel 10 is assembled in a groove of a contact seat 6, a nut 9 is in threaded connection with one end, far away from the moving contact, of the moving end conducting rod 7, the contact seat 6 is fixed on an annular table of the moving end conducting rod 7 in a compression joint mode through a sleeve spanner, a spring 11 is installed in the spring barrel 10 and sleeved on an annular boss, a connector 13 is installed in the spring barrel 10, one end, far away from the barrel bottom of the spring barrel 10, of the spring is sleeved on the connector 13 and is in contact with a shaft shoulder 8 of the connector 13, then one end, far away from the barrel bottom, of the spring barrel 10 is in threaded connection with a nut 12, and an insulating pull rod 5 is in transmission connection with the connector 13, so that the.
When the vacuum arc-extinguishing chamber 1 of the vacuum circuit breaker works, the insulating pull rod 5 pushes the joint 13 to move, the joint 13 compresses the spring 11 in the spring cylinder 10, the spring 11 has certain pressure on the cylinder bottom of the spring cylinder 10 after being stressed, because the cylinder bottom of the spring cylinder 10 is assembled in the groove on the contact seat 6, the pressure at the end part of the spring cylinder 10 is transmitted to the contact seat 6 and drives the movable end conducting rod 7 to move, along with the advance of the movable end conducting rod 7, the contact pressure between the movable contact and the fixed contact is gradually increased, when the movable contact on the movable end conducting rod 7 is in contact with the fixed contact on the fixed end conducting rod, the contact pressure is suddenly increased to a preset pressure value, the contact pressure makes the movable contact and the fixed contact have a good contact state at the beginning, and the contact pressure is enough to resist the electric repulsion force, so that the switch-on.
Claims (10)
1. The utility model provides a vacuum circuit breaker, is including moving end conducting rod and electrically conductive a support section of thick bamboo, be equipped with in the electrically conductive support section of thick bamboo and be used for the drive to move the spring unit who holds the conducting rod, spring unit includes a spring section of thick bamboo, a spring section of thick bamboo with move end conducting rod fixed connection, its characterized in that: the spring cylinder is guided and assembled in the conductive supporting cylinder.
2. Vacuum interrupter according to claim 1, characterized in that: the part of the spring cylinder, which is used for being in guide fit with the conductive support cylinder, is in guide fit with the conductive support cylinder through the spring cylinder guide ring.
3. Vacuum interrupter according to claim 2, characterized in that: the spring cylinder is provided with a large-diameter end matched with the guide cylinder of the conductive support cylinder.
4. Vacuum interrupter according to claim 2 or 3, characterized in that: the spring barrel is internally provided with a joint which is used for being in transmission connection with the insulating pull rod, the joint is provided with a stopping step which is used for pressing the spring to the barrel bottom of the spring barrel, and the large-diameter end of the spring barrel is provided with a stopping piece which is matched with the stopping step in a stopping way along the axial direction.
5. Vacuum interrupter according to claim 4, characterized in that: the stop piece is a nut which is connected to the spring barrel through threads, the joint is assembled in the nut in a guiding mode, and a joint guiding ring is arranged between the joint and the nut.
6. Vacuum interrupter according to claim 4, characterized in that: the joint is of a round shaft structure, one end, far away from the bottom of the spring barrel, of the spring is sleeved on the joint, and the stopping step is formed by a shaft shoulder arranged on the joint.
7. Vacuum interrupter according to claim 1, 2 or 3, characterized in that: a contact seat is arranged between the movable end conductive rod and the spring barrel, the contact seat is sleeved on the movable end conductive rod, a ring platform is arranged on the outer peripheral surface of the movable end conductive rod, and the contact seat is fixed on the ring platform in a compression joint mode through the spring barrel.
8. Vacuum interrupter according to claim 7, characterized in that: the contact seat is matched with the conductive supporting cylinder in a guiding way.
9. Vacuum interrupter according to claim 8, characterized in that: a groove is formed in the contact seat, and one end, far away from the large-diameter end, of the spring barrel is assembled in the groove.
10. Vacuum interrupter according to claim 1, 2 or 3, characterized in that: the spring barrel is characterized in that an annular boss parallel to the axis of the spring barrel and protruding into the spring barrel is arranged at the barrel bottom of the spring barrel, a spring is arranged in the spring barrel, and the spring is sleeved on the annular boss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810765526.7A CN110718415B (en) | 2018-07-12 | 2018-07-12 | Vacuum circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810765526.7A CN110718415B (en) | 2018-07-12 | 2018-07-12 | Vacuum circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110718415A true CN110718415A (en) | 2020-01-21 |
| CN110718415B CN110718415B (en) | 2021-11-16 |
Family
ID=69209210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810765526.7A Active CN110718415B (en) | 2018-07-12 | 2018-07-12 | Vacuum circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110718415B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114429880A (en) * | 2021-12-17 | 2022-05-03 | 河南平高电气股份有限公司 | Vacuum arc extinguish chamber assembly and vacuum circuit breaker |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0949643A1 (en) * | 1998-03-31 | 1999-10-13 | Moeller GmbH | Electrical switchgear, particularly electromagnetical switchgear with vacuum interrupter |
| CN101075509A (en) * | 2007-06-26 | 2007-11-21 | 西安交通大学 | High-voltage vacuum circuit breaker with mono-fracture voltage to 252kV |
| CN101587796A (en) * | 2009-06-18 | 2009-11-25 | 浙江纪元电气集团有限公司 | Breaker adjustable tripping spring structure |
| CN201667312U (en) * | 2010-01-20 | 2010-12-08 | 北京华东森源电气有限责任公司 | Solid-sealed pole structure of high-voltage vacuum circuit breaker |
| CN201689825U (en) * | 2010-06-10 | 2010-12-29 | 常熟开关制造有限公司(原常熟开关厂） | Switching-on spring structure of vacuum circuit breaker |
| CN102017040A (en) * | 2008-04-24 | 2011-04-13 | 日本Ae帕瓦株式会社 | Vacuum circuit breaker |
| CN202268301U (en) * | 2011-10-14 | 2012-06-06 | 常州市明及电气技术开发有限公司 | Pressure spring type brake opening and closing transmission mechanism of vacuum circuit breaker |
| CN103489704A (en) * | 2013-09-25 | 2014-01-01 | 苏州朗格电气有限公司 | Operating device for vacuum circuit breaker |
| CN103959417A (en) * | 2011-12-02 | 2014-07-30 | 西门子公司 | Switching device |
| CN104064397A (en) * | 2013-03-20 | 2014-09-24 | 广东维能电气有限公司 | Lumbar-support rotary-type voltage-sharing grounding shielding high-voltage vacuum arc extinguishing chamber solid-sealed polar pole |
| CN204577334U (en) * | 2015-05-08 | 2015-08-19 | 常熟开关制造有限公司(原常熟开关厂） | A kind of insulated tension pole of vacuum circuit-breaker |
| CN205680611U (en) * | 2016-06-23 | 2016-11-09 | 浙江恒控电气有限公司 | A kind of outdoor high-voltage vacuum breaker pole |
| US9659729B2 (en) * | 2013-10-29 | 2017-05-23 | Siemens Aktiengesellschaft | Electrical switch |
| CN206331960U (en) * | 2016-10-25 | 2017-07-14 | 广东电网有限责任公司电力科学研究院 | A kind of indoor handcart type heavy current breaker pole with stack effect |
-
2018
- 2018-07-12 CN CN201810765526.7A patent/CN110718415B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0949643A1 (en) * | 1998-03-31 | 1999-10-13 | Moeller GmbH | Electrical switchgear, particularly electromagnetical switchgear with vacuum interrupter |
| CN101075509A (en) * | 2007-06-26 | 2007-11-21 | 西安交通大学 | High-voltage vacuum circuit breaker with mono-fracture voltage to 252kV |
| CN102017040A (en) * | 2008-04-24 | 2011-04-13 | 日本Ae帕瓦株式会社 | Vacuum circuit breaker |
| CN101587796A (en) * | 2009-06-18 | 2009-11-25 | 浙江纪元电气集团有限公司 | Breaker adjustable tripping spring structure |
| CN201667312U (en) * | 2010-01-20 | 2010-12-08 | 北京华东森源电气有限责任公司 | Solid-sealed pole structure of high-voltage vacuum circuit breaker |
| CN201689825U (en) * | 2010-06-10 | 2010-12-29 | 常熟开关制造有限公司(原常熟开关厂） | Switching-on spring structure of vacuum circuit breaker |
| CN202268301U (en) * | 2011-10-14 | 2012-06-06 | 常州市明及电气技术开发有限公司 | Pressure spring type brake opening and closing transmission mechanism of vacuum circuit breaker |
| CN103959417A (en) * | 2011-12-02 | 2014-07-30 | 西门子公司 | Switching device |
| CN104064397A (en) * | 2013-03-20 | 2014-09-24 | 广东维能电气有限公司 | Lumbar-support rotary-type voltage-sharing grounding shielding high-voltage vacuum arc extinguishing chamber solid-sealed polar pole |
| CN103489704A (en) * | 2013-09-25 | 2014-01-01 | 苏州朗格电气有限公司 | Operating device for vacuum circuit breaker |
| US9659729B2 (en) * | 2013-10-29 | 2017-05-23 | Siemens Aktiengesellschaft | Electrical switch |
| CN204577334U (en) * | 2015-05-08 | 2015-08-19 | 常熟开关制造有限公司(原常熟开关厂） | A kind of insulated tension pole of vacuum circuit-breaker |
| CN205680611U (en) * | 2016-06-23 | 2016-11-09 | 浙江恒控电气有限公司 | A kind of outdoor high-voltage vacuum breaker pole |
| CN206331960U (en) * | 2016-10-25 | 2017-07-14 | 广东电网有限责任公司电力科学研究院 | A kind of indoor handcart type heavy current breaker pole with stack effect |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114429880A (en) * | 2021-12-17 | 2022-05-03 | 河南平高电气股份有限公司 | Vacuum arc extinguish chamber assembly and vacuum circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110718415B (en) | 2021-11-16 |
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Effective date of registration: 20241009 Address after: South East of Pingdingshan city in Henan province 467001 No. 22 Patentee after: HENAN PING GAO ELECTRIC Co.,Ltd. Country or region after: China Patentee after: STATE GRID CORPORATION OF CHINA Address before: South East of Pingdingshan city in Henan province 467001 No. 22 Patentee before: PINGGAO GROUP Co.,Ltd. Country or region before: China Patentee before: STATE GRID CORPORATION OF CHINA |