CN100435253C - A high-speed double-break magnetic blowing middle-pressure great electric current direct current current-limiting circuit breaker - Google Patents
A high-speed double-break magnetic blowing middle-pressure great electric current direct current current-limiting circuit breaker Download PDFInfo
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- CN100435253C CN100435253C CNB2006101049650A CN200610104965A CN100435253C CN 100435253 C CN100435253 C CN 100435253C CN B2006101049650 A CNB2006101049650 A CN B2006101049650A CN 200610104965 A CN200610104965 A CN 200610104965A CN 100435253 C CN100435253 C CN 100435253C
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Abstract
The invention relates to a highs-peed dual-cut magnetic blow middle-voltage large-current direct-current limit chopper, wherein via spring connecting rod, it can synchronously bidirectional open the contactor of dual-cut chopper; via four-contactor conductive, it can time the initial electric repulsion force in short circuit, to realize high-speed gate and limit current; and via magnetic blow winding and extinguishment grid plate, it can prolong electric arc and accelerate arc into grid plate; since the electric arc has special path, it can cool arc in grid plate and avoid fly arc.
Description
Technical field
The present invention is applied to middle current limiting technique of pressing on the large current DC circuit breaker a kind of relating to, and presses the heavy DC current limiting circuit breaker in the magnetic blow-out of particularly a kind of high-speed double-break mouth.
Background technology
Because the peculiar advantage of direct current network structure has the trend of being pressed the transition of ac/dc looped network by traditional low-voltage alternating-current radial pattern network in exchanging in fields such as naval vessel electric power.Therefore the research of carrying out direct current power system and the corollary equipment focus that become international.For direct current network, the shortage of dc circuit breaker makes one of its important step that becomes researching DC network protection action.And along with the increase of net capacity, significantly promoting of the short circuit current that causes has higher requirement for the current limiting capacity of dc circuit breaker.
The application of current limliting breaking technology can make circuit breaker have higher breaking capacity, reduces the requirement of power distribution equipment dynamic thermal stability simultaneously.The current limiting of breaker technology has had widely in low-pressure field to be used, and almost still blank in the research of the big current domain of middle pressure.Up to the present the current limiting technique in low-voltage circuit breaker mainly contains: improve contact breaking speed method, blowout coil method, forced draft arc blow-out method, PTC resistance current limliting method, integrated application of superconducting current-limiting method or above several method or the like.Wherein force air blow off to be mainly used in little electric current and cut-off, that is that all right at present is ripe for commercial Application for PTC resistance current limliting method and superconducting current-limiting method.For traditional list to dynamic/static contact, by the method for high speed mechanisms such as permanent magnet mechanism, repulsive force mechanism raising contact breaking speed, the raising of speed is limited, if will further improve, breaker mechanism complexity and volume are increased greatly, can not satisfy the general requirement of this circuit breaker of compact conformation.The conventional method of blowout coil is unidirectional magnetic blow-out, and electric arc straight line under the effect in magnetic field quickens, and can cause the free difficulty that disappears outside the grid sheet under the condition of the big electric current of middle pressure, and arcing phenomena is serious, and the free equipment volume that perhaps disappears increases.
Summary of the invention
The object of the present invention is to provide a kind of compact conformation, operating mechanism simple and can cut-off in press in the high-speed double-break mouth magnetic blow-out of the big short circuit current of grade and press the heavy DC current limiting circuit breaker.
In order to achieve the above object, the technical solution used in the present invention is: comprise circuit breaker cradle and be arranged on arc control device on the circuit breaker cradle, in arc control device, be provided with arc extinguishing grid pieces, be characterized in, in arc control device, be provided with blowout coil, be disposed with the insulation fixed lever on the circuit breaker cradle of arc control device lower end, the conduction fixed lever ' and kinematic link, the insulation fixed lever is connected with the circuit breaker cradle axle with the conduction fixed lever, kinematic link is arranged on the circuit breaker cradle by the kinematic link chute of vertical direction, it comprises that also two couple that polyphone connects is symmetricly set on the interior actuator of arc control device, this actuator comprises contact and the conducting rod and the elastic conduction bar that are connected as a single entity with contact, fixedly connected and O1 around the shaft with insulation fixed lever and conduction fixed lever respectively in the lower end of the elastic conduction bar of two symmetries, O2 rotates, the elastic conduction bar is connected with the rigidity connecting rod, the rigidity connecting rod is connected with insulated connecting rod, and insulated connecting rod also is connected with kinematic link.
The centre of arc control device of the present invention is provided with insulating barrier, and two pairs of actuators are separately positioned on the both sides of insulating barrier; Arc extinguishing grid pieces is the U-shaped structure, and contact is arranged on the U-shaped arc extinguishing grid pieces breach direction; Blowout coil is arranged on the center tip position of arc control device, and the magnetic field center position that blowout coil produces is a vertical direction, the magnetic field that blowout coil produces makes the arc motion direction point to arc extinguishing grid pieces, and the arc motion track in the grid sheet is a curve-like under magnetic blow-out; The top of arc control device and be provided with venthole and the free device that disappears perpendicular to the both sides of arc extinguishing grid pieces.
Because contact of the present invention is a bidirectional open, therefore under the effect of identical strength, the speed that contact elongates will be faster, and simple in structure.And two pairs of contacts connect in circuit, and the speed that whole electric arc elongates will increase greatly than single break dynamic/static contact structure speed.And the tangible benefit of bringing is the recovery voltage that each fracture is only born half, presses the current limliting of big short circuit current to cut-off in being more conducive to.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present invention;
Fig. 2 is a contact motion schematic diagram of the present invention;
Fig. 3 is an arc quenching chamber structure schematic diagram of the present invention;
Fig. 4 is an arc control device bottom view of the present invention;
Fig. 5 is a closing position view of the present invention;
Fig. 6 is that interrupting process contact of the present invention is scolded out schematic diagram;
Fig. 7 is an interrupting process mechanism kinematic schematic diagram of the present invention;
Fig. 8 is an electric arc magnetic blow-out principle schematic of the present invention.
Embodiment
Be described in further detail below in conjunction with accompanying drawing with to structural principle of the present invention and operation principle.
Referring to Fig. 1-4, the present invention includes circuit breaker cradle 2 and be arranged on arc control device 1 on the circuit breaker cradle 2, in arc control device 1, be provided with arc extinguishing grid pieces 10 and blowout coil 11, arc extinguishing grid pieces 10 is the U-shaped structure, blowout coil 11 is arranged on the center tip position of arc control device 1, the magnetic field of its generation is vertical direction at center position, magnetic direction makes magnetic blow-out electric arc direction point to arc extinguishing grid pieces 10, on the circuit breaker cradle 2 of arc control device 1 lower end, be disposed with insulation fixed lever 7, conduction fixed lever 7 ' and a kinematic link 14, insulation fixed lever 7 and the fixed lever 7 ' be connected of conducting electricity with 2 of circuit breaker cradles, kinematic link 14 is arranged on the circuit breaker cradle 2 by kinematic link chute 17, it comprises that also two couple that polyphone connects is symmetricly set on the actuator 3 in the arc control device 1, this actuator 3 comprises contact 4 and the conducting rod 5 and the elastic conduction bar 6 that are connected as a single entity with contact 4, the lower end of the elastic conduction bar 6 of two symmetries respectively with insulation fixed lever 7 and conduction fixed lever 7 ' fixedly connected and O1 around the shaft, O2 rotates, elastic conduction bar 6 is connected with rigidity connecting rod 18, rigidity connecting rod 18 is connected with insulated connecting rod 8, and insulated connecting rod 8 also is connected with kinematic link 14, the centre of arc control device 1 is provided with insulating barrier 12, two pairs of actuators 3 are separately positioned on the both sides of insulating barrier 12, and contact 4 is arranged on the U-shaped arc extinguishing grid pieces 10 breach directions.
Introduce specific operation process, current limliting principle and the advantage of the circuit breaker that the present invention relates to below in detail according to the separating brake process.
Referring to Fig. 5, when being in "on" position by the present invention, the rigidity connecting rod 18 between O1, O3 and O2, the O4 is a horizontal level, the precompression when elastic conduction bar 6 provides contact to close a floodgate, and two conducting rods 5 that are oppositely arranged are in parallel position.
In the current limiting circuit breaker design principle, when fault current takes place, need as soon as possible dynamic/static contact to be separated, can allow contact 4 before mechanism threads off, opened in advance by the effect of electromagnetic force.When big electric current took place, dynamic/static contact arm and contact part were subjected to bigger electrodynamic repulsion force each other owing to the magnetic field that produces separately, help the restriction to short circuit current.Referring to Fig. 6, when being short-circuited fault, contact of breaker 4 and conducting rod 5 before the action of threading off are because the process that the very big electrodynamic repulsion force of Short-Circuit High Current generation separates.Contrast with Fig. 5, because the also not action of threading off, so main shaft O1, O2, not action of insulated connecting rod 8.But because elastic conduction bar 6 is pushed in the effect of electrodynamic repulsion force open, the former conducting rod 5 that is in parallel position, reach contact 4 and open generation electric arc to both sides, the magnetic field that is produced by conducting rod 5 and contact 4 parts has arc blowing function electric arc 13 elongations, and short circuit is had metering function.Wherein long conducting rod combined floodgate is set to parallel position and can utilizes the initial electrodynamic repulsion force effect of short circuit to greatest extent.To the contact motion, the mechanism of electrodynamic repulsion force is identical at another, and because two fractures are cascaded structure, can obtain better current limitation effect so that the short circuit that acts on of electrodynamic repulsion force doubles when initial.
Referring to Fig. 7, after the release action, the separating brake motion process of mechanism.Under tripping spring power F effect, kinematic link 14 moves downward, and insulated connecting rod 8 is along with kinematic link 14 moves downward, and around its rotation.Because main shaft O1, O2 shaft core position fix, under kinematic link 14 interlock effects, contact 4 is along with conducting rod 5 is opened fast to both sides, and elongate electric arc 13 rapidly in the magnetic field that also has the galvanic circle to produce simultaneously.Another structure to contact is identical, and is synchronized with the movement under the effect of kinematic link 14.Because contact is a bidirectional open, therefore under the effect of identical strength, the speed that contact elongates will be faster, and simple in structure in the present invention.And two pairs of contacts connect in circuit, and the speed that whole electric arc elongates will increase greatly than single break dynamic/static contact structure speed.And the tangible benefit of bringing is the recovery voltage that each fracture is only born half, presses the current limliting of big short circuit current to cut-off in being more conducive to.
Referring to Fig. 8, as shown in the figure, the electric arc that produces during separating brake will move under circuit electromagnetic effect and the thermal expansion of self obliquely upward.Break away from after contact 4 enters arc leading angle at electric arc, the blowout coil 11 that is series between end of incoming cables and the arc leading angle will be access in the loop, so circuit breaker blowout coil when normal combined floodgate operating state does not have the problem of heating.The Distribution of Magnetic Field 16 that blowout coil 11 produces as shown in Figure 8, the advantage of magnetic blow-out method of the present invention are because under the action of a magnetic field, cause in the path of running of electric arc.Electric arc enters arc extinguishing grid pieces 10 after entering arc leading angle under the magnetic blow-out effect of Distribution of Magnetic Field 16, arc position 15 enters position behind the arc extinguishing grid pieces 10 for electric arc, and the action direction of magnetic blow-out power Fm as shown in the figure.Therefore can to make the run path of electric arc under the action of a magnetic field be track shown in 9 to the size of parameter by adjusting blowout coil 11 and arc control device 1.The benefit that magnetic blow-out of the present invention design brings is that to make the run track of electric arc arc extinguishing grid pieces 10 in be curve, can utilize the area of grid sheet to cool off electric arc so more fully.Simultaneously some high-temperature ionized gas is overflowed with the free device 19 that disappears from the gas outlet of arc control device sidewall, can obviously reduce arc energy, having increased the active area of the free device that disappears, having alleviated the disappear burden of free device of arc control device top, can obtain better antiarcing-over effect.Electric arc extinguishes high-temperature ionized gas at the arc control device top and is sprayed by the top afterwards, by the free device cooling of disappearing of top.Another benefit of magnetic blow-out method of the present invention is that electric arc does not directly quicken to a direction under the magnetic blow-out effect, the upwards acceleration that electric arc is subjected to before electric arc is run near the arc control device top is reducing, near the top time, no longer upwards quicken, even reduce speed now, thereby avoided the electric arc speed of running to cause the arcing splash serious soon, the top free device shortcoming that over-burden that disappears, and more help electric arc and in the grid sheet, extinguish.
Claims (5)
1, press the heavy DC current limiting circuit breaker in the magnetic blow-out of a kind of high-speed double-break mouth, comprise circuit breaker cradle (2) and be arranged on arc control device (1) on the circuit breaker cradle (2), in arc control device (1), be provided with arc extinguishing grid pieces (10), it is characterized in that: in arc control device (1), be provided with blowout coil (11), be disposed with insulation fixed lever (7) on the circuit breaker cradle (2) of arc control device (1) lower end, conduction fixed lever (7 ') and kinematic link (14), insulation fixed lever (7) is connected with circuit breaker cradle (2) axle with conduction fixed lever (7 '), kinematic link (14) is arranged on the circuit breaker cradle (2) by the kinematic link chute (17) of vertical direction, it comprises that also two couple that polyphone connects is symmetricly set on the interior actuator (3) of arc control device (1), this actuator (3) comprises contact (4) and the conducting rod (5) and the elastic conduction bar (6) that are connected as a single entity with contact (4), fixedly connected and (O1 around the shaft with insulation fixed lever (7) and conduction fixed lever (7 ') respectively in the lower end of the elastic conduction bar (6) of two symmetries, O2) rotate, elastic conduction bar (6) is connected with rigidity connecting rod (18), rigidity connecting rod (18) is connected with insulated connecting rod (8), and insulated connecting rod (8) also is connected with kinematic link (14).
2, press the heavy DC current limiting circuit breaker in the high-speed double-break mouth according to claim 1 magnetic blow-out, it is characterized in that: the centre of said arc control device (1) is provided with insulating barrier (12), and two pairs of actuators (3) are separately positioned on the both sides of insulating barrier (12).
3, press the heavy DC current limiting circuit breaker in the high-speed double-break mouth according to claim 1 magnetic blow-out, it is characterized in that: said arc extinguishing grid pieces (10) is the U-shaped structure, and contact (4) is arranged on U-shaped arc extinguishing grid pieces (10) the breach direction.
4, press the heavy DC current limiting circuit breaker in the high-speed double-break mouth according to claim 1 magnetic blow-out, it is characterized in that: said blowout coil (11) is arranged on the center tip position of arc control device (1), and the magnetic field center position that blowout coil (11) produces is a vertical direction, the magnetic field that blowout coil (11) produces makes the arc motion direction point to arc extinguishing grid pieces (10), and the arc motion track (9) in the grid sheet is a curve-like under magnetic blow-out.
5, press the heavy DC current limiting circuit breaker in the high-speed double-break mouth according to claim 1 magnetic blow-out, it is characterized in that: the top of said arc control device (1) and be provided with venthole and the free device (19) that disappears perpendicular to the both sides of arc extinguishing grid pieces (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101049650A CN100435253C (en) | 2006-11-24 | 2006-11-24 | A high-speed double-break magnetic blowing middle-pressure great electric current direct current current-limiting circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101049650A CN100435253C (en) | 2006-11-24 | 2006-11-24 | A high-speed double-break magnetic blowing middle-pressure great electric current direct current current-limiting circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1967753A CN1967753A (en) | 2007-05-23 |
| CN100435253C true CN100435253C (en) | 2008-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101049650A Expired - Fee Related CN100435253C (en) | 2006-11-24 | 2006-11-24 | A high-speed double-break magnetic blowing middle-pressure great electric current direct current current-limiting circuit breaker |
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| Country | Link |
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| CN (1) | CN100435253C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109119291B (en) * | 2018-09-10 | 2024-02-20 | 上海良信电器股份有限公司 | Arc extinguishing structure of direct current contactor |
| CN112490094A (en) * | 2020-12-22 | 2021-03-12 | 西安理工大学 | Current-limiting air direct-current circuit breaker arc extinguishing device and arc extinguishing method thereof |
| CN112820580B (en) * | 2020-12-30 | 2023-01-24 | 河北电力装备有限公司 | Strap type transverse magnetic field direct current transfer device and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2631735A1 (en) * | 1988-05-17 | 1989-11-24 | Merlin Gerin | Device for adjusting a medium-voltage electric switch |
| CN2475124Y (en) * | 2001-03-06 | 2002-01-30 | 张瑞意 | Magnetic blowing arc extinguishing switch |
| CN1719562A (en) * | 2004-07-08 | 2006-01-11 | Abb瑞士有限公司 | Arc extinguishing device for circuit breaker |
-
2006
- 2006-11-24 CN CNB2006101049650A patent/CN100435253C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2631735A1 (en) * | 1988-05-17 | 1989-11-24 | Merlin Gerin | Device for adjusting a medium-voltage electric switch |
| CN2475124Y (en) * | 2001-03-06 | 2002-01-30 | 张瑞意 | Magnetic blowing arc extinguishing switch |
| CN1719562A (en) * | 2004-07-08 | 2006-01-11 | Abb瑞士有限公司 | Arc extinguishing device for circuit breaker |
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| Publication number | Publication date |
|---|---|
| CN1967753A (en) | 2007-05-23 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Zhenjiang Chengxiang Electrical Appliance Co., Ltd. Assignor: Xi'an Jiaotong University Contract fulfillment period: 2008.12.25 to 2013.12.25 Contract record no.: 2009320000440 Denomination of invention: A high-speed double-break magnetic blowing middle-pressure great electric current direct current current-limiting circuit breaker Granted publication date: 20081119 License type: Exclusive license Record date: 2009.3.19 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.12.25 TO 2013.12.25; CHANGE OF CONTRACT Name of requester: ZHENJIANG CHENGXIANG ELECTRICAL APPLIANCE CO.,LTD Effective date: 20090319 |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081119 Termination date: 20171124 |