CN110473735B - Isolating switch and moving contact thereof - Google Patents
Isolating switch and moving contact thereof Download PDFInfo
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- CN110473735B CN110473735B CN201910522988.0A CN201910522988A CN110473735B CN 110473735 B CN110473735 B CN 110473735B CN 201910522988 A CN201910522988 A CN 201910522988A CN 110473735 B CN110473735 B CN 110473735B
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- 230000006978 adaptation Effects 0.000 claims abstract description 5
- 230000003044 adaptive effect Effects 0.000 claims description 16
- 230000003068 static effect Effects 0.000 abstract description 20
- 230000003139 buffering effect Effects 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 230000033001 locomotion Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 210000002421 cell wall Anatomy 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Classifications
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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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- Switches Operated By Changes In Physical Conditions (AREA)
- Contacts (AREA)
Abstract
The invention relates to the field of electric switches, in particular to an isolating switch and a moving contact thereof. The moving contact comprises a first conductive part and a second conductive part, the first conductive part and the second conductive part are in sliding fit and in conductive contact, a buffer structure is arranged between the first conductive part and the second conductive part, the second conductive part pushes the first conductive part to move when the first conductive part is switched on through the buffer structure, a stopping structure in stopping fit with the first conductive part in the direction away from the first conductive part is further arranged on the second conductive part, and the second conductive part drives the first conductive part to move when the second conductive part is switched off through the stopping structure. Because the first conductive part of moving contact just begins to be compressed with the contact of static contact conductive back buffer structure, can not slow down isolator's closing speed, through the impact energy of buffer structure absorption moving contact and adaptation contact, reduce the impact of moving contact and adaptation contact, the problem of the short-lived that buffer structure buffering effect is not good to cause when having solved present moving contact and using.
Description
The application is a divisional application of the following applications, the application date of the original application: 24/07/2017, application number of original application: 2017106083800, title of original application: isolator and moving contact thereof.
Technical Field
The invention relates to the field of electric switches, in particular to an isolating switch and a moving contact thereof.
Background
The direct current isolating switch is one of key corollary equipment of a direct current circuit breaker, the matching use of the direct current isolating switch and the direct current circuit breaker is accelerated, the flexibility and the reliability of distributed new energy power intervention and direct current circuit switching are improved, in the structural design of the existing high-speed motion contact, in order to reduce the impact force between a moving contact and a static contact in the switching-on process, a buffer structure is usually arranged between the moving contact and a base or between an insulating pull rod and the moving contact to buffer the moving contact, the buffer structure can be a spring, a buffer cavity and the like, although the arrangement mode of the buffer structure can reduce the impact force between the moving contact and the static contact, the buffer structure is arranged separately from the moving contact, the impact force between the moving contact and the static contact is reduced, the buffer structure starts to act on the moving contact before the moving contact and the static contact, and the buffer structure is equivalent to the, this just causes the closing speed reduction of moving contact, in order not to influence closing speed, and the usual way is to reduce the buffer power of buffer structure to the moving contact, and consequently, the effect that this kind of buffer structure reduces the striking force between the moving contact is limited, causes the problem that the moving contact life-span is short.
Disclosure of Invention
The invention aims to provide a moving contact, which aims to solve the problem of short service life caused by poor buffering effect of a buffering structure when the existing moving contact is used; in addition, the invention also aims to provide an isolating switch using the moving contact.
In order to achieve the above purpose, a first technical scheme of the moving contact of the invention is as follows: the moving contact comprises a first conductive part and a second conductive part, the first conductive part is in conductive contact with the adaptive contact, the second conductive part is used for driving the first conductive part to move, the first conductive part is in sliding fit with the second conductive part and is in conductive contact with the second conductive part, a buffer structure is arranged between the first conductive part and the second conductive part, the second conductive part pushes the first conductive part to move through the buffer structure when the first conductive part is switched on, a stop structure which is in stop fit with the first conductive part in the direction far away from the first conductive part is further arranged on the second conductive part, the second conductive part drives the first conductive part to move when the second conductive part is switched off through the stop structure, the buffer structure comprises a gas buffer chamber formed by the first conductive part and the second conductive part, a first groove is arranged on the first conductive part, a second groove is arranged on the second conductive part, and the first groove and the second groove are mutually inserted to form the gas buffer chamber, the groove wall of the second groove is inserted into the first groove and is in guiding sliding fit with the groove wall of the first groove.
The second technical scheme of the moving contact of the invention is as follows: on the basis of the first technical scheme of the moving contact, the buffer structure comprises an elastic buffer piece arranged between the opposite surfaces of the first conductive part and the second conductive part, and the elastic buffer piece is arranged between the first conductive part and the second conductive part in a top mounting mode.
The third technical scheme of the moving contact is as follows: on the basis of the second technical scheme of the moving contact, the elastic buffer part is a disc spring.
In order to achieve the above object, a first technical solution of the disconnector of the present invention is: the isolating switch comprises a base, a moving contact and an adaptive contact, wherein the moving contact is assembled on the base in a guiding and sliding mode, the adaptive contact is adaptive to the moving contact, the moving contact comprises a first conductive part and a second conductive part, the first conductive part is in conductive contact with the adaptive contact, the second conductive part is used for driving the first conductive part to move, the first conductive part is in sliding fit and conductive contact with the second conductive part, a buffer structure is arranged between the first conductive part and the second conductive part, the second conductive part pushes the first conductive part to move when the second conductive part is switched on through the buffer structure, a stop structure in stop fit with the first conductive part in the direction far away from the first conductive part is further arranged on the second conductive part, the second conductive part drives the first conductive part to move when the second conductive part is switched off through the stop structure, and the buffer structure comprises a gas buffer chamber formed by the first conductive part and the second conductive part in a, the gas buffer chamber can play a role in buffering, can also reduce the weight of the moving contact, improves the speed of the moving contact, be equipped with first recess on the first conducting part, be equipped with the second recess on the second conducting part, first recess and second recess are inserted each other and are closed in order to enclose gas buffer chamber, the cell wall cartridge of second recess in first recess with first recess cell wall direction sliding fit.
The second technical scheme of the isolating switch is as follows: on the basis of the first technical scheme of the isolating switch, the buffer structure comprises an elastic buffer piece arranged between the opposite surfaces of the first conductive part and the second conductive part, and the elastic buffer piece is arranged between the first conductive part and the second conductive part in a top mounting mode. The elastic buffer piece is used as a buffer structure, so that the structure is simple, the cost is low, and the assembly is convenient. In addition, the elastic buffer piece can apply reverse thrust to the second conductive part in the opening process, and the rapid separation of the elastic buffer piece and the adaptive contact is accelerated.
The third technical scheme of the isolating switch is as follows: on the basis of the second technical scheme of the isolating switch, the elastic buffer part is a disc spring. The elastic coefficient of dish spring is great, can realize great energy storage in shorter distance, reduces the moving contact as far as possible to the impact of adaptation contact, and in addition, the volume of dish spring can reduce the moving contact.
The fourth technical scheme of the isolating switch is as follows: on the basis of any one of the first technical scheme to the third technical scheme of the isolating switch, the moving contact is in guide sliding fit with the base through the first conductive part.
The invention has the beneficial effects that: when the switching-on operation is carried out, the second conductive part pushes the first conductive part to move so that the first conductive part is in conductive contact with the adaptive contact to realize switching-on, and after the first conductive part is in contact with the adaptive contact, the second conductive part compresses the buffer structure, so that the impact energy of the moving contact and the adaptive contact is absorbed through the buffer structure, the impact force of the moving contact and the adaptive contact is reduced, and the service life of the moving contact is prolonged. In addition, because the buffer structure begins to be compressed after the first conductive part of the moving contact of the structure is in conductive contact with the adaptive contact, the closing speed of the moving contact and the adaptive contact cannot be reduced, and the problem of short service life caused by poor buffer effect of the buffer structure when the existing moving contact is used is solved.
Drawings
Fig. 1 is a schematic state diagram of a moving contact and a fixed contact of an embodiment 1 of an isolating switch according to the present invention before contact;
fig. 2 is a schematic diagram of a state before a moving contact and a fixed contact of an embodiment 2 of the isolating switch of the present invention are contacted.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
In a specific embodiment 1 of the isolating switch of the present invention, as shown in fig. 1, the isolating switch includes a fixed contact 1, a base 2, and a movable contact 3 slidably mounted on the base 2 in a guiding manner, in this embodiment, the movable contact 3 is in conductive contact with the fixed contact 1 through an end surface, and the fixed contact constitutes an adaptive contact adapted to the movable contact. The relative movement direction of the movable contact 3 and the base 2 is defined as the front-back direction. The static contact 1 comprises a static contact seat 11 and a static contact body 12, the movable contact 3 comprises a first conductive part 31 for electrically contacting with the static contact 1 and a second conductive part 32 for driving the first conductive part 31 to move, and the first conductive part 31 is positioned at the front side of the second conductive part 32. The first conductive part 31 comprises a body 311, a contact body 312 fixed to the body 311 for electrically conductive contact with the stationary contact 1, and a fixing sleeve 313 screwed to the body.
The first conductive part 31 is in sliding fit with the second conductive part 32 in a front-back direction and is in conductive contact with the second conductive part 32, a buffer structure is arranged between the first conductive part 31 and the second conductive part 32, and the second conductive part 32 pushes the first conductive part 31 to move through the buffer structure when the switch is switched on. In this embodiment, the buffer structure includes a disc spring 33 mounted between the first conductive portion 31 and the second conductive portion 32, and further includes a gas buffer chamber 34 surrounded by the first conductive portion 31 and the second conductive portion 32. The disc spring 33 in this embodiment constitutes an elastic buffer member disposed between the first conductive portion 31 and the second conductive portion 32, but in other embodiments, the disc spring may be another elastic buffer member such as a coil spring. Because the disc spring 33 has a large elastic coefficient, large energy storage can be realized in a short distance, the impact force of the moving contact and the static contact is reduced as much as possible, the relative movement distance of the first conductive part 32 and the second conductive part 32 can be reduced by using the disc spring 33 as an elastic buffer part, the movement distance of the moving contact 3 is conveniently controlled, and the requirement on the accuracy of the operating mechanism can be reduced.
The body of the first conductive part 31 is provided with a first groove 314, the second conductive part 32 is provided with a second groove 321, and the groove wall of the first groove 314 and the groove wall of the second groove 321 are mutually inserted to enclose the gas buffer chamber 34. The disc spring 33 is used in cooperation with the gas buffer chamber 34, so that the specification of the disc spring 33 can be reduced, and the volume of the movable contact 3 can be reduced. Meanwhile, the weight of the moving contact is reduced by using the gas buffer chamber, and the moving contact can be driven to achieve higher speed by the operating mechanism, so that the opening and closing speed is increased.
In this embodiment, the disc spring 33 is fitted around the outer peripheral surface of the groove wall of the second groove 321. The second conductive portion 32 is provided with an annular boss 322, the annular boss 322 forms a stop structure on the second conductive portion 32, and the second conductive portion 32 drives the first conductive portion 31 to move through the annular boss 322 during opening. The disc spring 33 presses against the front side of the annular protrusion 322, i.e. the elastic buffer presses against the side of the annular protrusion 322 facing the first conductive part 31, and the other end of the disc spring 33 presses against the front end face of the groove wall of the first groove 314. In this embodiment, the disc spring 33 is located in the fixing sleeve 313, the front end of the fixing sleeve 313 is screwed to the body 311, the rear end of the fixing sleeve 313 is provided with an inner flange 315, the annular boss 322 is in stop fit with the inner flange 315 in the front-rear direction, and the inner circumferential surface of the inner flange 315 is in guide sliding fit with the second conductive portion 32 in the front-rear direction. The inner peripheral surface of the inner flange 315 is provided with a flange guide ring 316, and the flange guide ring 316 improves the guiding sliding accuracy of the fixing sleeve 313 and the second conductive part 32. The fixing sleeve 313 and the groove wall of the second groove 321 form an annular space for mounting the disc spring 33, and the structure is compact.
In this embodiment, the first conductive portion 31 is slidably fitted to the base 2 in the front-rear direction, and two base guide rings 21 are disposed on the base 2 in the front-rear direction, wherein the base guide ring 21 on the front side is slidably fitted to the body 311 in the guide manner, and the base guide ring 21 on the rear side is slidably fitted to the outer peripheral surface of the fixing sleeve 313 in the guide manner. The first conductive part 31 moves relative to the base 2 by the base guide ring 21 and moves relative to the second conductive part 32 by the flange guide ring 316 and the groove guide ring 317.
In this embodiment, the second conductive part 32 is provided with a pin hole 323 for connecting with the transmission rod, and the second conductive part 32 is driven by the transmission rod to move back and forth.
When the movable contact 3 of the present invention is assembled, the disc spring 33 is firstly sleeved on the second conductive part, then the first groove 314 of the first conductive part 31 and the second groove 321 of the second conductive part 32 are inserted together, and finally the fixing sleeve 313 is threaded on the body 311 of the first conductive part 31 from one end of the second conductive part 32.
When the isolating switch is switched on, the transmission rod drives the second conductive part 32 to move forwards, the second conductive part 32 pushes the first conductive part 31 to move forwards through the buffer structure until the front end face of the contact body 312 of the first conductive part 31 is contacted with the static contact 1, the second conductive part 32 starts to compress the disc spring 33 and the gas buffer chamber 34, and because the motion of the movable contact 3 belongs to high-speed motion, gas in the gas buffer chamber 34 is instantly compressed, and the disc spring 33 and the gas in the gas buffer chamber 34 form double buffering, so that the switching-on holding force of the movable contact 3 and the static contact 1 is slowly increased, and the impact force of the movable contact and the static contact is reduced. When the isolating switch is switched off, the second conducting part 32 moves backwards in a reverse direction, the pressure of the disc spring 33 is released, the second conducting part 32 is pushed to move in a reverse direction in an accelerating mode, and the moving contact and the static contact are separated quickly.
The moving contact of the isolating switch is a high-speed moving contact, and the impact energy of the moving contact and the static contact is absorbed through the buffer structure, so that the impact force of the moving contact and the static contact is reduced, and the service lives of the moving contact and the static contact are prolonged. Because the buffer structure begins to be compressed after the first conductive part 31 of the moving contact 3 is in conductive contact with the static contact 1, the closing speed of the moving contact and the static contact cannot be reduced, and the problem of short service life caused by poor buffer effect of the buffer structure when the moving contact 3 is used at present is solved.
Embodiment 4 of the isolating switch of the present invention, the isolating switch in this embodiment is different from embodiment 1 of the isolating switch described above only in that: the buffer structure comprises only a disc spring.
In the specific embodiment of the moving contact of the present invention, the structure of the moving contact in the embodiment is the same as that of the moving contact described in the specific embodiment 1 or 2 or 3 or 4 of the isolating switch, and details are not repeated.
In other embodiments of the isolating switch and the moving contact thereof, the body and the contact body of the moving contact can be of an integrated structure; the fixing sleeve can be arranged on the second conductive part, and the structure of the corresponding first conductive part is adaptively changed so that the second conductive part can drive the first conductive part to move; the gas buffer chamber may be provided only on the first conductive portion, a piston may be provided on a side wall of the gas buffer chamber, and the second conductive portion may compress the gas buffer chamber by the piston; the adaptive contact of the moving contact can also be a moving contact with the same structure as the moving contact or a common moving contact without a buffer structure instead of a static contact.
Claims (7)
1. Moving contact, its characterized in that: the gas buffer device comprises a first conductive part and a second conductive part, wherein the first conductive part is in conductive contact with the adaptive contact, the second conductive part is used for driving the first conductive part to move, the first conductive part is in sliding fit with the second conductive part and is in conductive contact with the second conductive part, a buffer structure is arranged between the first conductive part and the second conductive part, the second conductive part pushes the first conductive part to move through the buffer structure when the first conductive part is switched on, a stop structure which is in stop fit with the first conductive part in the direction far away from the first conductive part is further arranged on the second conductive part, the second conductive part drives the first conductive part to move through the stop structure when the second conductive part is switched off, the buffer structure comprises a gas buffer chamber formed by the first conductive part and the second conductive part in a surrounding manner, a first groove is arranged on the first conductive part, a second groove is arranged on the second conductive part, and the first groove and the second groove are mutually inserted and combined to form the gas buffer chamber in a, the groove wall of the second groove is inserted into the first groove and is in guiding sliding fit with the groove wall of the first groove.
2. A movable contact according to claim 1, wherein: the buffer structure comprises an elastic buffer piece arranged between the opposite surfaces of the first conductive part and the second conductive part, and the elastic buffer piece is jacked between the first conductive part and the second conductive part.
3. A movable contact according to claim 2, wherein: the elastic buffer part is a disc spring.
4. Isolator, including the moving contact of base and direction slip assembly on the base, still include with the adaptation contact of moving contact adaptation, its characterized in that: the moving contact comprises a first conductive part and a second conductive part, the first conductive part is in conductive contact with the adaptive contact, the second conductive part is used for driving the first conductive part to move, the first conductive part is in sliding fit with the second conductive part and is in conductive contact with the second conductive part, a buffer structure is arranged between the first conductive part and the second conductive part, the second conductive part pushes the first conductive part to move through the buffer structure when the first conductive part is switched on, a stop structure which is in stop fit with the first conductive part in the direction far away from the first conductive part is further arranged on the second conductive part, the second conductive part drives the first conductive part to move when the second conductive part is switched off through the stop structure, the buffer structure comprises a gas buffer chamber formed by the first conductive part and the second conductive part in a surrounding mode, a first groove is arranged on the first conductive part, a second groove is arranged on the second conductive part, and the first groove and the second groove are mutually inserted and combined to form the gas buffer chamber in a surrounding mode, the groove wall of the second groove is inserted into the first groove and is in guiding sliding fit with the groove wall of the first groove.
5. The disconnector of claim 4, wherein: the buffer structure comprises an elastic buffer piece arranged between the opposite surfaces of the first conductive part and the second conductive part, and the elastic buffer piece is jacked between the first conductive part and the second conductive part.
6. The isolating switch of claim 5, wherein: the elastic buffer part is a disc spring.
7. A disconnector according to any one of claims 4-6, characterized in that: the moving contact is in guide sliding fit with the base through the first conductive part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910522988.0A CN110473735B (en) | 2017-07-24 | 2017-07-24 | Isolating switch and moving contact thereof |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910522988.0A CN110473735B (en) | 2017-07-24 | 2017-07-24 | Isolating switch and moving contact thereof |
| CN201710608380.0A CN107578944B (en) | 2017-07-24 | 2017-07-24 | Disconnecting switch and its moving contact |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710608380.0A Division CN107578944B (en) | 2017-07-24 | 2017-07-24 | Disconnecting switch and its moving contact |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110473735A CN110473735A (en) | 2019-11-19 |
| CN110473735B true CN110473735B (en) | 2021-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710608380.0A Active CN107578944B (en) | 2017-07-24 | 2017-07-24 | Disconnecting switch and its moving contact |
| CN201910522988.0A Active CN110473735B (en) | 2017-07-24 | 2017-07-24 | Isolating switch and moving contact thereof |
| CN201910523046.4A Active CN110491714B (en) | 2017-07-24 | 2017-07-24 | Isolating switch and moving contact thereof |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710608380.0A Active CN107578944B (en) | 2017-07-24 | 2017-07-24 | Disconnecting switch and its moving contact |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910523046.4A Active CN110491714B (en) | 2017-07-24 | 2017-07-24 | Isolating switch and moving contact thereof |
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| CN (3) | CN107578944B (en) |
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| CN108493041B (en) * | 2018-02-08 | 2019-10-01 | 北京双杰电气股份有限公司 | A kind of unidirectional gas damping buffering insulated pull rod |
| CN111146169B (en) * | 2018-11-06 | 2022-03-18 | 株洲中车时代半导体有限公司 | Conductive disc spring assembly for crimping module |
| CN111146048A (en) * | 2020-01-13 | 2020-05-12 | 吴妍佩 | Self-recovery direct current fuse |
| CN111292541A (en) * | 2020-03-13 | 2020-06-16 | 王光柱 | Vehicle overspeed monitoring and warning equipment |
| CN112133606A (en) * | 2020-09-29 | 2020-12-25 | 哈尔滨工业大学 | Static contact for reducing closing rebound of direct-acting electromagnetic contactor |
| CN112435875A (en) * | 2020-12-08 | 2021-03-02 | 安徽宝泰特种材料有限公司 | Touch switch device capable of bearing super-large current |
| CN114724882A (en) * | 2022-03-16 | 2022-07-08 | 河北邯峰发电有限责任公司 | High-frequency power supply high-voltage isolating switch |
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| US4128749A (en) * | 1976-09-07 | 1978-12-05 | Spaderna Conan H | Latching switch |
| CN201256089Y (en) * | 2008-08-11 | 2009-06-10 | 瓦房店高压开关有限公司 | Valve division buffering mechanism for circuit breaker |
| CN101887071B (en) * | 2010-07-09 | 2015-05-13 | 河南平高电气股份有限公司 | Measurement terminal and isolating switch |
| CN201811980U (en) * | 2010-07-09 | 2011-04-27 | 河南平高电气股份有限公司 | Measuring terminal and isolating switch |
| KR101415065B1 (en) * | 2010-11-17 | 2014-07-04 | 엘에스산전 주식회사 | Contact apparatus for circuit breaker |
| CN201956301U (en) * | 2011-04-12 | 2011-08-31 | 浙宝开关(杭州)有限公司 | Circuit breaker sensing finger device |
| CN102412070B (en) * | 2011-07-25 | 2014-01-29 | 中国西电电气股份有限公司 | Guide and buffer device of moving contact |
| CN202307554U (en) * | 2011-10-10 | 2012-07-04 | 厦门华电开关有限公司 | Rapid separation isolating switch |
| CN102368443B (en) * | 2011-10-10 | 2014-03-12 | 厦门华电开关有限公司 | Quickly-separated disconnecting switch |
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2017
- 2017-07-24 CN CN201710608380.0A patent/CN107578944B/en active Active
- 2017-07-24 CN CN201910522988.0A patent/CN110473735B/en active Active
- 2017-07-24 CN CN201910523046.4A patent/CN110491714B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107578944A (en) | 2018-01-12 |
| CN107578944B (en) | 2019-05-14 |
| CN110473735A (en) | 2019-11-19 |
| CN110491714B (en) | 2021-08-03 |
| CN110491714A (en) | 2019-11-22 |
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