CN107706043A - A kind of vacuum direct current quick breaker - Google Patents
A kind of vacuum direct current quick breaker Download PDFInfo
- Publication number
- CN107706043A CN107706043A CN201711215552.4A CN201711215552A CN107706043A CN 107706043 A CN107706043 A CN 107706043A CN 201711215552 A CN201711215552 A CN 201711215552A CN 107706043 A CN107706043 A CN 107706043A
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- CN
- China
- Prior art keywords
- direct current
- overcurrent
- vacuum
- spring
- breaker
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- 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
-
- 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
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention discloses a kind of vacuum direct current quick breaker, including insulation box, insulation box is built with vacuum tube, spring mechanism, overcurrent release device and electromagnetic actuator device；Spring mechanism, electromagnetic actuator device, overcurrent release device are sequentially connected by conductive slide bar, realize the operating work horizontal linear transmission of electromagnetic drive mechanism, under overcurrent condition, dropout push rod opens shift fork top, breaker disconnects by back-moving spring, realizes overcurrent tripping function.Combine that mechanical switch through-current capability is strong, maintenance period is long, electric arc is not exposed and switch trip speed is fast, control is reliable, realizes soft the advantages of cut-offfing；Using vacuum duct occlusion arc extinguishing, possess direct current and cut-off the functions such as closure and overcurrent tripping, while have small volume concurrently, simple and compact for structure, the advantages such as maintenance cost is low.
Description
Technical field
The present invention relates to a kind of rail vehicle technology, more particularly to a kind of vacuum direct current quick breaker.
Background technology
China's Rail Transit System passes through the fast development of decades from 20th century mid-term till now, as subway is in China
Large scale construction, the production domesticization of electric power supply system for subway equipment has been increasingly becoming the primary study project of country.At present, China
For metro traction power system mostly by the way of direct current supply, metro traction electric substation passes through 12 pulse waves or 24 pulse wave rectifiers
Device, 35kV alternating currents are changed into 1500V or 750V direct currents, then DC traction is transported to by direct current cables by dc circuit breaker
Contact net.Dc circuit breaker is arranged on subway train or in tractive power supply system, is controlled the introducing of dc source and is cut-off,
Play a part of failure and jump noisy, protection electric power system, it is control and protection indispensable in train and electric power supply system for subway
Device.Traditional arc extinguishing grating dc circuit breaker needs larger flashover distance and arc gap, and arc-chute volume is larger, and
Actuation time length is cut-off, caused electric arc is serious to its arc-chute and contact wear, safeguards and replacing is more frequent, system is done
Disturb larger.
Now widely used subway uses arc-chute arc extinguishing with dc circuit breaker, and main contact is exposed, when breaker disconnects,
By main circuit magnetic fields, electric arc is inhaled into arc-chute, because electric arc contacts with the insulation wall of arc-chute, so as to rapid cold
But, liberation is removed in enhancing, improves arc stream drop, is insulation between grid, and it acts on the heat that can export electric arc, to improve
The arc of electric arc lives pressure drop, while electric arc is divided into a section electric arc by grid, and each grid is the electrode of these short arcs, also
There are many an individual anode drops and cathode drop, when the arcdrop at proximal pole adds the voltage drop of arc column sufficiently large, supply voltage
Cannot pilot arc, arc extinction.But arc-chute arc extinguishing reliability is poor, quenching time length, the easy scaling loss of contact, capacity is small,
Electric arc is exposed, arcing risk be present；And arc-chute is bulky, grid maintenance period is short, costly.
The content of the invention
It is an object of the invention to provide a kind of vacuum direct current quick breaker for railcar.
The purpose of the present invention is achieved through the following technical solutions：
The vacuum direct current quick breaker of the present invention, including insulation box, the insulation box is built with vacuum tube, spring
Mechanism, overcurrent release device and electromagnetic actuator device；
The insulation box includes insulation top plate, insulating base, equipped with insulation between the insulation top plate and insulating base
End plate, insulating barrier one and insulating barrier two；
The spring mechanism includes back-moving spring, excess of stroke spring, contiguous block and compression plate；
The overcurrent release device includes dropout push rod；
The electromagnetic actuator device includes shift fork, electromagnetic mechanism；
The spring mechanism, electromagnetic actuator device, overcurrent release device are sequentially connected by conductive slide bar, realize that electromagnetism drives
The operating work horizontal linear transmission of motivation structure, under overcurrent condition, the dropout push rod opens shift fork top, and breaker is by multiple
Position spring disconnects, and realizes overcurrent tripping function.
As seen from the above technical solution provided by the invention, vacuum direct current provided in an embodiment of the present invention is quick break
Device, reset disconnection, overcurrent release device quick-speed turning on-off, vacuum tube arc extinguishing using based on electromagnetic mechanism driving closure, spring mechanism
Cut-off unit composite switch technology in parallel with IGBT, combine mechanical switch through-current capability is strong, maintenance period is long, electric arc not
Exposed and switch trip speed is fast, control is reliable, realizes soft the advantages of cut-offfing；Using vacuum duct occlusion arc extinguishing, possess direct current and open
The function such as disconnected closure and overcurrent tripping, while have small volume concurrently, it is simple and compact for structure, the advantages such as maintenance cost is low, it is direct current
The trend of breaker development.
Brief description of the drawings
Fig. 1 is the structural representation of vacuum direct current quick breaker provided in an embodiment of the present invention.
Fig. 2 is the vacuum direct current quick breaker sectional view (off-state) in the embodiment of the present invention；
Fig. 3 is the vacuum direct current quick breaker sectional view (closure state) in the embodiment of the present invention；
Fig. 4 is the vacuum direct current quick breaker sectional view (overcurrent tripping state) in the embodiment of the present invention；
In figure：
1st, insulation box, 2, input copper bar, 3, output end copper bar, 4, vacuum tube, 5, spring mechanism, 6, overcurrent tripping dress
Put, 7, electromagnetic actuator device, 8, moving contact, 9, static contact, 10, back-moving spring, 11, excess of stroke spring, 12, contiguous block, 13, compress
Disk, 14, overcurrent detecting device, 15, dropout push rod, 16, electromagnetic mechanism, 17, shift fork, 18, connector, 19, conductive slide bar,
20th, ratchet, 21, soft braided wire, 22, insulation top plate, 23, insulating end plate, 24, insulating base, 25, insulating barrier one, 26, insulation every
Plate two.
Embodiment
The embodiment of the present invention will be described in further detail below.What is be not described in detail in the embodiment of the present invention is interior
Appearance belongs to prior art known to professional and technical personnel in the field.
The vacuum direct current quick breaker of the present invention, its preferable embodiment are：
Including insulation box, the insulation box is built with vacuum tube, spring mechanism, overcurrent release device and electromagnetic drive
Device；
The insulation box includes insulation top plate, insulating base, equipped with insulation between the insulation top plate and insulating base
End plate, insulating barrier one and insulating barrier two；
The spring mechanism includes back-moving spring, excess of stroke spring, contiguous block and compression plate；
The overcurrent release device includes dropout push rod；
The electromagnetic actuator device includes shift fork, electromagnetic mechanism；
The spring mechanism, electromagnetic actuator device, overcurrent release device are sequentially connected by conductive slide bar, realize that electromagnetism drives
The operating work horizontal linear transmission of motivation structure, under overcurrent condition, the dropout push rod opens shift fork top, and breaker is by multiple
Position spring disconnects, and realizes overcurrent tripping function.
The vacuum tube is assemblied between insulating end plate and insulating barrier one, the back-moving spring, excess of stroke spring, contiguous block
And compression plate is assemblied between insulating barrier one and insulating barrier two.
Overcurrent detecting device is housed, the conductive slide bar passes through from the center of overcurrent detecting device on the insulating barrier two
And assembled with the compression plate by screw threads for fastening, the termination of the conductive slide bar is equipped with ratchet and soft braided wire, soft braided wire with
Output end copper bar is connected, and top and the shift fork bottom of dropout push rod are pressed close to, the bottom hook portion and ratchet of shift fork
Contact.
The output end copper bar connects train High voltage output interface, the input copper bar of static contact connection in the vacuum tube
Train high input voltage interface is connected, the connector of the electromagnetic mechanism is connected with Train Control circuit, receives train controlling center
Cut-off and closure signal.
The present invention vacuum direct current quick breaker, using based on electromagnetic mechanism driving closure, spring mechanism reset disconnect,
Overcurrent release device quick-speed turning on-off, vacuum tube arc extinguishing and IGBT cut-off unit composite switch technology in parallel, combine machinery
Current capability of the switcher is strong, maintenance period is long, electric arc is not exposed and switch trip speed is fast, control is reliable, realize it is soft cut-off it is excellent
Point.
The present invention uses vacuum duct occlusion arc extinguishing, possesses direct current and cut-offs the functions such as closure and overcurrent tripping, has concurrently simultaneously
Small volume, simple and compact for structure, the advantages such as maintenance cost is low, it is the trend that dc circuit breaker develops.
The present invention is realized using vacuum tube, spring mechanism, electromagnetic actuator device and overcurrent release device assembling, is overcome existing
There is dc circuit breaker by arc-chute arc extinguishing, the defects of capacity is small, and volume is big, and maintenance period is short, and electric arc is exposed, electric arc is closed
Extinguish, arc extinguishing ability is strong, compact overall structure, and anti shock and vibration ability is strong, improves product reliability and practicality.
The functional modules such as vacuum tube, spring mechanism, electromagnetic actuator device, overcurrent release device are divided in insulation by the present invention
Between dividing plate, overall is in " one " word straight line, realizes that breaker cut-offs closure and tripping function.
Vacuum direct current quick breaker original state is off-state, after breaker closing signal is received, electromagnetic drive
Device obtains electric, is moved right by electromagnetic force shift fork, and shift fork promotes the ratchet on conductive slide bar to move right, conductive slide bar
Promote compression plate, compression plate promotes contiguous block, while compression reseting spring, back-moving spring energy storage, contiguous block promote static contact to
Right motion, until moving contact closes with static contact, breaker closing is completed after having compressed excess of stroke spring.When train controlling center is sent out
After going out cut-off signal, circuit breaker electric magnetic drive unit dead electricity loses electromagnetic actuation force, and reset of breaker spring and excess of stroke spring are released
Elastic potential energy is put, pulls moving contact to be separated with static contact, while promote contiguous block, compression plate, conductive slide bar and shift fork
To left movement, until back-moving spring recovers just holding position, breaker, which is realized, to be disconnected.In vacuum direct current quick breaker normally closed
With in disconnection process, overcurrent release device does not work, only when breaker is in closure state, passed through in major loop certain
High current, and exceeded the setting valve of overcurrent release device, now overcurrent release device triggers, and it is upward to take off mouth push rod moment
Shift fork is opened on motion, top, and back-moving spring release potential energy resets, and breaker moment disconnects.Caused by breaker disconnection process
Electric arc is all enclosed in vacuum tube, will not be exposed.
The present invention resets disconnection, overcurrent release device quick-speed turning on-off, vacuum using electromagnetic mechanism driving closure, spring mechanism
Pipe arc extinguishing and IGBT cut-off unit composite switch technology in parallel, with mechanical switch through-current capability is strong, maintenance period is long, electric
Arc is not exposed and switch trip speed is fast, control is reliable, realizes soft the advantages of cut-offfing.Conductive slide bar is utilized in structure by breaker
Spring mechanism, electromagnetic actuator device, overcurrent release device three parts " one " word are connected, and realize the operating work water of electromagnetic drive mechanism
Flat line transmission, without acceptance of persons, operating work is transmitted without rotating lever, loss is extremely low.It is used for subway described in the embodiment of the present invention
Vacuum circuit breaker, overall structure assembling is simple, and application prospect is boundless.
Specific embodiment：
As shown in Figures 1 to 4, vacuum direct current quick breaker shell is insulation box 1, and input copper bar 2 connects train
High input voltage interface, output end copper bar 3 connect train High voltage output interface, and breaker, which plays, connects main circuit and cut-out main circuit
Function.Breaker connector 18 is connected with Train Control circuit, receive train controlling center cut-off and closure signal.Vacuum
Direct current quick breaker key component (such as Fig. 1) includes vacuum tube 4, spring mechanism 5, overcurrent release device 6, electromagnetic actuator device
7。
Insulating end plate 23, insulating barrier 1 and insulating barrier 2 26 be assemblied in insulation top plate 22 and insulating base 24 it
Between, vacuum tube 4 is assemblied between insulating end plate 23 and insulating barrier 1, back-moving spring 10, excess of stroke spring 11, contiguous block 12 and
Compression plate 13 is assemblied between insulating barrier 1 and insulating barrier 2 26, and overcurrent detecting device 14 is assemblied in insulating barrier 2 26
On, conductive slide bar 19 is passed through from the center of overcurrent detecting device 14 and assembled with compression plate 13 by screw threads for fastening, conductive slide bar 19
Termination assembling ratchet 20, while assemble soft braided wire 21, soft braided wire 21 is connected with output end copper bar 3, and dropout push rod 15 belongs to electric
The moving part of magnetic drive unit 7, press close to the bottom of shift fork 17 at the top of its push rod, the bottom hook portion of shift fork 17 and
Ratchet 20 contacts, and shift fork 17, electromagnetic mechanism 16 belong to the part of electromagnetic actuator device 7.
Disconnected with reference to vacuum circuit breaker and closing course is described in detail to this vacuum direct current quick breaker mechanism.
Vacuum direct current quick breaker original state is main fracture off-state (such as Fig. 2), is resetted by back-moving spring 10
Spring makes the moving contact of moving contact 8 be in disconnection released state with the static contact of static contact 9, when connector 18 receives train closure letter
Number when, under the electromagnetic force of electromagnetic mechanism 16, shift fork 17 moves right, promote ratchet 20 move right, promote to the right
Power is transferred to the right moving contact 8 by conductive slide bar 19, compression plate 13, contiguous block 12, and moving contact 8 finally collides with static contact 9
After contact, the thrust of shift fork 17 is more than the elastic force of back-moving spring 10 and excess of stroke spring 11, back-moving spring 10 in the process
Contact closure is realized by compressed energy-storage, vacuum circuit breaker with excess of stroke spring 11.
Vacuum direct current quick breaker is in main fracture closure state (such as Fig. 3), is disconnected when connector 18 receives train
During signal, shift fork 17 loses electromagnetic force and no longer applies thrust to the right, and back-moving spring 10 discharges elastic potential with excess of stroke spring 11
Can, pull moving contact 8 to be separated with static contact 9 to left movement, while contiguous block 12 is promoted, compression plate 13, conductive slide bar 19, spine
Wheel 20 and shift fork 17 are to left movement, until back-moving spring 10 finishes with the release of the potential energy of excess of stroke spring 11, reach initial spacing
Position, contact are kept completely separate, and are reached disconnection and are opened away from vacuum direct current quick breaker, which is realized, to be disconnected.
The overcurrent release device of overcurrent release device 6 only just touches when electric loop is by high current beyond its setting valve
Start to make, after now the overcurrent detecting device 14 of vacuum direct current quick breaker detects high current, driven by electromagnetic force de-
The button dropout push rod of push rod 15 is moved (such as Fig. 4) upwards, and shift fork 17 is opened on top, and ratchet 20 departs from the neck of shift fork 17, therefore not
It is driven the thrust of shift fork 17 again, and thrust to the left, breaker wink is passed over by back-moving spring 10 and excess of stroke spring 11
When disconnect.After high current disappears, dropout push rod 15 is moved downward by the effect of the contained spring of electromagnetic actuator device 7, returns to
Initial position.
The present invention using based on electromagnetic mechanism driving closure, spring mechanism reset disconnection, overcurrent release device quick-speed turning on-off,
The switching technique of vacuum tube arc extinguishing, with mechanical switch through-current capability is strong, maintenance period is long, electric arc is not exposed and switch trip is fast
The advantages of degree is fast, control is reliable, improve the reliability of train operation.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art is in the technical scope of present disclosure, the change or replacement that can readily occur in,
It should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Enclose and be defined.
Claims (4)
1. a kind of vacuum direct current quick breaker, it is characterised in that including insulation box, the insulation box is built with vacuum
Pipe, spring mechanism, overcurrent release device and electromagnetic actuator device；
The insulation box include insulation top plate, insulating base, it is described insulation top plate and insulating base between equipped with insulating end plate,
Insulating barrier one and insulating barrier two；
The spring mechanism includes back-moving spring, excess of stroke spring, contiguous block and compression plate；
The overcurrent release device includes dropout push rod；
The electromagnetic actuator device includes shift fork, electromagnetic mechanism；
The spring mechanism, electromagnetic actuator device, overcurrent release device are sequentially connected by conductive slide bar, realize electromagnetic drive machine
The operating work horizontal linear transmission of structure, under overcurrent condition, the dropout push rod opens shift fork top, and breaker is by resetting bullet
Spring disconnects, and realizes overcurrent tripping function.
2. vacuum direct current quick breaker according to claim 1, it is characterised in that the vacuum tube is assemblied in insulating end
Between plate and insulating barrier one, the back-moving spring, excess of stroke spring, contiguous block and compression plate are assemblied in insulating barrier one and insulation
Between dividing plate two.
3. vacuum direct current quick breaker according to claim 2, it is characterised in that be equipped with the insulating barrier two
Flow detection device, the conductive slide bar are passed through from the center of overcurrent detecting device and filled with the compression plate by screw threads for fastening
Match somebody with somebody, the termination of the conductive slide bar is equipped with ratchet and soft braided wire, and soft braided wire is connected with output end copper bar, the top of dropout push rod
Press close to shift fork bottom, the bottom hook portion of shift fork contacts with ratchet.
4. vacuum direct current quick breaker according to claim 3, it is characterised in that the output end copper bar connects train
High voltage output interface, the input copper bar connection train high input voltage interface of static contact connection in the vacuum tube, the electromagnetism
The connector of mechanism is connected with Train Control circuit, receive train controlling center cut-off and closure signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711215552.4A CN107706043B (en) | 2017-11-28 | 2017-11-28 | A kind of vacuum direct current quick breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711215552.4A CN107706043B (en) | 2017-11-28 | 2017-11-28 | A kind of vacuum direct current quick breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107706043A true CN107706043A (en) | 2018-02-16 |
| CN107706043B CN107706043B (en) | 2019-05-17 |
Family
ID=61185972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711215552.4A Active CN107706043B (en) | 2017-11-28 | 2017-11-28 | A kind of vacuum direct current quick breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107706043B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110690073A (en) * | 2019-10-15 | 2020-01-14 | 北京中车赛德铁道电气科技有限公司 | Electromagnetic control type vacuum contactor |
| CN114300302A (en) * | 2021-12-27 | 2022-04-08 | 北京中车赛德铁道电气科技有限公司 | Switching-on and switching-off operating mechanism of vacuum circuit breaker |
| CN114360957A (en) * | 2021-12-27 | 2022-04-15 | 北京中车赛德铁道电气科技有限公司 | High-voltage isolating switch |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3534304A (en) * | 1967-11-13 | 1970-10-13 | English Electric Co Ltd | Electrical switchgear with actuating means incorporating an overcurrent trip |
| CN1921049A (en) * | 2006-09-13 | 2007-02-28 | 施文峰 | Low-voltage vacuum switch |
| CN202339881U (en) * | 2011-11-21 | 2012-07-18 | 无锡市蓝虹电子有限公司 | Fast horizontal type vacuum switch for flexible power transmission |
| CN205645662U (en) * | 2016-05-23 | 2016-10-12 | 云南人民电力电气有限公司 | Outdoor intelligent permanent magnet vacuum circuit breaker |
-
2017
- 2017-11-28 CN CN201711215552.4A patent/CN107706043B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3534304A (en) * | 1967-11-13 | 1970-10-13 | English Electric Co Ltd | Electrical switchgear with actuating means incorporating an overcurrent trip |
| CN1921049A (en) * | 2006-09-13 | 2007-02-28 | 施文峰 | Low-voltage vacuum switch |
| CN202339881U (en) * | 2011-11-21 | 2012-07-18 | 无锡市蓝虹电子有限公司 | Fast horizontal type vacuum switch for flexible power transmission |
| CN205645662U (en) * | 2016-05-23 | 2016-10-12 | 云南人民电力电气有限公司 | Outdoor intelligent permanent magnet vacuum circuit breaker |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110690073A (en) * | 2019-10-15 | 2020-01-14 | 北京中车赛德铁道电气科技有限公司 | Electromagnetic control type vacuum contactor |
| CN114300302A (en) * | 2021-12-27 | 2022-04-08 | 北京中车赛德铁道电气科技有限公司 | Switching-on and switching-off operating mechanism of vacuum circuit breaker |
| CN114360957A (en) * | 2021-12-27 | 2022-04-15 | 北京中车赛德铁道电气科技有限公司 | High-voltage isolating switch |
| CN114360957B (en) * | 2021-12-27 | 2024-03-29 | 北京中车赛德铁道电气科技有限公司 | High-voltage isolating switch |
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| Publication number | Publication date |
|---|---|
| CN107706043B (en) | 2019-05-17 |
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