CN104681371A - Variable rotating shaft contact structure for direct current circuit breaker - Google Patents
Variable rotating shaft contact structure for direct current circuit breaker Download PDFInfo
- Publication number
- CN104681371A CN104681371A CN201510053626.3A CN201510053626A CN104681371A CN 104681371 A CN104681371 A CN 104681371A CN 201510053626 A CN201510053626 A CN 201510053626A CN 104681371 A CN104681371 A CN 104681371A
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- China
- Prior art keywords
- contact
- rotating shaft
- spring
- push rod
- circuit 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/04—Contacts
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Abstract
The invention provides a variable rotating shaft contact structure for a direct current circuit breaker. The contact structure comprises a moving contact, a fixed contact outlet copper bar, a lower outlet copper bar and a pushrod combination, wherein a moving contact silver point is arranged on the moving contact; a corresponding fixed contact silver point is arranged on the fixed contact outlet copper bar; a middle shaft pin is arranged on the middle part of the moving contact, and is connected with a first spring mounting seat through a breaking spring; a lower shaft pin is arranged on the lower part of the moving contact; a second spring mounting seat is arranged on the lower outlet copper bar; the lower shaft pin is connected with the second spring mounting seat through a contact pressure spring; a waist-shaped hole is further formed in the lower part of the moving contact; a shaft pin is arranged in the waist-shaped hole; the pushrod combination comprises a metal pushrod, an insulating pushrod and a metal stirring fork pushrod; a pushrod rotating shaft is arranged on the metal pushrod; a corresponding shaft hole is formed in the insulating pushrod; the insulating pushrod can rotate up and down around the pushrod rotating shaft. According to the contact structure, better electric repulsive force compensation is ensured, the short-time withstand capacity of the circuit breaker is improved, and high tripping speed and high breaking speed can be achieved.
Description
Technical field
The invention belongs to DC circuit breaker technical field, relate to a kind of DC circuit breaker and become rotating shaft structure of contact terminal, specifically a kind of electrodynamic repulsion force that not only can realize compensates but also can the breaker contact system structure of rapid-releasing.
Background technology
Along with the development of track traffic, new forms of energy and direct current distribution technology, DC power-supply system application is more and more extensive, wherein, as the key equipment of DC power-supply system, high-capacity direct current circuit breaker is in order to improve short circuit withstand capacity and the short circuit interruption ability of circuit breaker, the contact pressure between contact of breaker need be increased, and breaker open operation speed need be improved, then breaker closing power significantly increases, cause greatly improving the performance requirement of material, structure becomes increasingly complex, and then affects whole development, the application of high-current on-off equipment.
Summary of the invention
For middle pressure DC circuit breaker short-time withstand and short circuit interruption capability problems, the present invention designs a kind of change rotating shaft movable contact system structure based on electric power compensation principle, its object is to the short circuit withstand capacity improving circuit breaker significantly, the breaker contact system structure of opening velocity can be improved by rapid-releasing.
Meanwhile, utilize the unique design of breaker contact system spring structure, make whole contact system can obtain high opening velocity at the separating brake process initial stage, meet higher electrical characteristic requirement, simplify the structure design, improves equipment operational reliability.
The present invention realizes above-mentioned technical purpose by following technological means.
A kind of DC circuit breaker becomes rotating shaft structure of contact terminal, comprise the combination of moving contact, fixed contact outlet copper bar, the first spring mounting seat, lower outlet copper bar, pivot pin and push rod, described moving contact top is fixed with moving contact silver point, and described fixed contact outlet copper bar is fixed with the fixed contact silver point corresponding with described moving contact silver point; The middle part of described moving contact is provided with middle part pivot pin, and described middle part pivot pin is connected with described first spring mounting seat by tripping spring; The bottom of described moving contact is provided with bottom pivot pin, and described lower outlet copper bar is installed with the second spring mounting seat, and described bottom pivot pin is connected by contact pressure spring with described second spring mounting seat; The below of described moving contact is also provided with mounting hole, and described pivot pin is placed in described mounting hole; Described push rod combination comprises metal pushrod, insulation push rod and metal shift fork push rod, and described metal pushrod is provided with push rod rotating shaft, and described insulation push rod is provided with the axis hole corresponding with push rod rotating shaft, and described insulation push rod can rotate up and down around push rod rotating shaft.
Further, the push rod back-moving spring vertically placed is provided with between described metal pushrod end and insulation push rod.
Further, the below of described lower outlet copper bar is fixedly connected with flexible connecting device, and the other end of described flexible connecting device is fixed on the lower end of described moving contact.
Further, described tripping spring and contact pressure spring are positioned at the homonymy of moving contact.
Further, described tripping spring belongs to Compress Spring.
Further, described contact pressure spring belongs to Compress Spring.
Further, described flexible connecting device is that Copper Foil formula or copper braiding belt are flexible coupling.
Further, described fixed contact outlet copper bar, the first spring mounting seat, lower outlet copper bar are all fixed in the cage of circuit breaker, and pivot pin position is fixed, irremovable.
Further, described first spring mounting seat, the second spring mounting seat are insulating material.
The invention has the beneficial effects as follows:
(1) the present invention is by the reasonable setting of the parts force application locations such as push rod combination, tripping spring, contact pressure spring, make full use of the dynamic change of moving contact motion process shaft, make contact system under "on" position, have good electrodynamic repulsion force to compensate, ensure between contact short circuit current by time still can keep certain contact, improve the short circuit withstand capacity of circuit breaker.Meanwhile, whole device can obtain high opening velocity when separating brake, simplifies mechanical structure, thus improves break performance and the reliability of DC circuit breaker.
(2) contact pressure spring etc. can be utilized when contact closure to cushion, reduce spring, utilize when contact separating brake touch spring power to make moving contact obtain certain initial kinetic energy, break melting welding point, improve initial opening velocity, reduce the arcing time, thus improve the speed of medium recovery; Push rod combination can automatically carry out the state variation that rotates Yu recover under power set drive, to promote the combined floodgate of circuit breaker, the carrying out smoothly of separating brake action.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is the combined floodgate initial procedure status architecture schematic diagram of the embodiment of the present invention.
Fig. 2 is the combined floodgate end rotation axis variable condition structural representation of the embodiment of the present invention.
Fig. 3 is the "on" position structural representation of the embodiment of the present invention.
Fig. 4 is the rapid-releasing gate-dividing state structural representation of the embodiment of the present invention.
Fig. 5 is push rod combining structure schematic diagram of the present invention.
Description of reference numerals is as follows:
1-moving contact; 2-metal shift fork push rod; 3-insulate push rod; Pivot pin in the middle part of 4-; 5-bottom pivot pin; 6-pivot pin; 7-mounting hole; 8-flexible connecting device; Outlet copper bar under 9-; 10-second spring mounting seat; 11-contact pressure spring; 12-first spring mounting seat; 13-tripping spring; 14-fixed contact outlet copper bar; 15-fixed contact silver point; 16-moving contact silver point; The rotating shaft of 17-push rod; 18-metal pushrod; 19-push rod back-moving spring.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the present invention is further illustrated; it is to be noted; only with the optimized technical scheme of one, technical scheme of the present invention and design principle are described in detail below, but protection scope of the present invention is not limited to this.
As shown in Figure 1, a kind of DC circuit breaker becomes rotating shaft structure of contact terminal, comprises mobilizable moving contact 1, is fixedly installed on fixed contact outlet copper bar 14 in the cage of circuit breaker and lower outlet copper bar 9; Described moving contact 1 lower end is connected with lower outlet copper bar 9 by the flexible connecting device 8 formed that is flexible coupling by Copper Foil formula or copper braiding belt, makes structure more reasonable, safe and reliable, forms soft drive, increase work efficiency and quality.
The moving contact silver point 16 coordinated with the fixed contact silver point 15 on fixed contact outlet copper bar 14 is provided with on front side of described moving contact 1 top; Front in the middle part of described moving contact 1 is provided with the first spring mounting seat 12, described first spring mounting seat 12 is connected by tripping spring 13 with between moving contact 1, tripping spring 13 is Compress Spring, the middle part of moving contact 1 is provided with a middle part pivot pin 4, and moving contact 1 is matched with tripping spring 13 by middle part pivot pin 4; The front of described moving contact 1 bottom is provided with the second spring mounting seat 10, described second spring mounting seat 10 is connected by contact pressure spring 11 with between moving contact 1, contact pressure spring 11 is Compress Spring, the bottom of moving contact 1 is provided with a bottom pivot pin 5, and moving contact 1 is matched with contact pressure spring 11 by bottom pivot pin 5.Described tripping spring 13 is installed in the first spring mounting seat 12, and the first spring mounting seat 12 is fixed in the cage of circuit breaker.The middle part of described moving contact 1 is provided with a middle part pivot pin 4, and tripping spring 13 forms active force backward by middle part pivot pin 4 pairs of moving contacts 1.Described contact pressure spring 11 is installed on the second spring mounting seat 10, and the second spring mounting seat 10 is fixed on lower outlet copper bar 9.The bottom of described moving contact 1 is provided with a bottom pivot pin 5, and contact pressure spring 11 is formed moving contact 1 active force backward by bottom pivot pin 5.The bottom of moving contact 1 also has the mounting hole 7 of a fore-and-aft direction, and is coordinated with a fixing pivot pin 6 by this mounting hole 7, enables the bottom of moving contact 1 in the spacing lower forward and backward movement of mounting hole 7 and rotation.
As shown in Figure 5, in the middle part of described moving contact 1, rear side is provided with the push rod combination that can apply forward force to moving contact 1, and push rod combination comprises insulation push rod 3, metal shift fork push rod 2 and metal pushrod 18, and push rod combination is driven by power set; Described metal pushrod 18 is provided with push rod rotating shaft 17, and described insulation push rod 3 is provided with corresponding axis hole, can rotate around push rod rotating shaft about 17.Metal pushrod 18 end is provided with push rod back-moving spring 19, promote insulation push rod 3 and have the trend moved upward, can be rotated down around push rod rotating shaft 17 under making push rod be combined in the effect of power F2, after power F2 disappears, under push rod is combined in the effect of back-moving spring 19, the combination of insulation push rod can recover level.Described push rod combination and middle part pivot pin 4 making contact, can form forward force to moving contact 1 under the effect of powered device power.
The operation principle of structure of the present invention is:
As shown in Figure 1, in combined floodgate initial procedure, power set drive push rod combination, push rod combination is to the active force applied in the middle part of moving contact 1 forward, simultaneously, contact pressure spring 11 applies active force in moving contact 1 bottom by bottom pivot pin 5, the front side of mounting hole 7 is made to be close on pivot pin 6, form the rotation axis being fulcrum shaft with pivot pin 6, at active force lower moving contact 1 forward with pivot pin 6 for rotation axis rotates clockwise, until the top of moving contact silver point 16 contacts with fixed contact silver point 15, initial condition as shown in Figure 2.
As shown in Figure 2, in combined floodgate end process, moving contact silver point 16 top contacts with fixed contact silver point 15, power set drive push rod combination to move forward, the run-on point that now to be formed with the contact position of moving contact silver point 16 and fixed contact silver point 15 be fulcrum, and moving contact 1 rotates counterclockwise with this run-on point, mounting hole 7 pivot pin 6 spacing under move forward, and compression contacts compression spring 11, complete making process after the excess of stroke puts in place, as shown in Figure 3 state.
As shown in Figure 3, under "on" position, form fixed pivot at middle part pivot pin 4 place of moving contact 1, at this moment moving contact 1 has and makes around middle part pivot pin 4 trend that turns clockwise under the effect of contact pressure spring 11, moving contact silver point 16 is contacted with fixed contact silver point 15 compress, and form contact pressure; When circuit breaker is by large Short-Circuit High Current, very large electrodynamic repulsion force F1 will be produced between moving contact silver point 16 and quiet silver contact 15, short circuit current flows through moving contact 1 simultaneously, produce electrodynamic repulsion force F3, the making a concerted effort of electrodynamic repulsion force F1 and F3 moving contact 1 is made to have the trend be rotated counterclockwise around middle part pivot pin 4,11, contact pressure spring stops this rotating tendency, compensate electrodynamic repulsion force to the impact of sound contact Contact pressure, make moving contact silver point 16 and quiet silver contact 15 place keep enough contact pressures, prevent moving contact 1 from being scolded out.The distinguishing feature of this structure is: electrodynamic repulsion force F3 is distributed in the both sides up and down of middle part pivot pin 4, and the overwhelming majority cancels each other, and the repulsion that contact pressure spring 11 need be overcome greatly reduces, thus significantly improves the ability of the anti-short time withstand current of contact of breaker.Simultaneously when short circuit separating brake, the fulcrum formed at middle part pivot pin 4 place is removed, promotion moving contact 1 is withdrawn by all tripping springs 13, contact pressure spring 11, electrodynamic repulsion force F1 and F3 backward (being rotated counterclockwise around pivot pin 6), improve opening velocity to greatest extent, be conducive to improving breaking capacity of breaker.Therefore invention significantly improves short circuit withstand capacity and the opening velocity of DC circuit breaker, be particularly suitable for short circuit withstand capacity and the high DC circuit breaker of connecting-disconnecting function requirement.
As shown in Figure 4 in separating brake process, tripping force F2 acts on the plectrum of the metal shift fork push rod 2 of push rod combination, metal shift fork push rod 2 is separated with middle part pivot pin 4, the point action of middle part pivot pin 4 disappears, now moving contact 1 under the acting in conjunction of contact pressure spring 11 and tripping spring 13 first relative to mounting hole 7 entirety after move, after being close to pivot pin 6 on front side of mounting hole 7, contact pressure spring 11 and tripping spring 13 acting in conjunction make moving contact 1 with pivot pin 6 for rotation axis is rotated counterclockwise, and moving contact silver point 16 is separated rapidly with fixed contact silver point 15; The distinguishing feature of this structure is: tripping spring 13 with provide the contact pressure spring 11 of sound contact closing retention force to be positioned at the homonymy of moving contact 1, the design of this organization plan, ensure tripping spring 13 in separating brake process without the need to overcoming the contact pressure spring 11 counter-force effect providing sound contact pressure, and contact pressure spring 11 can provide auxiliary driving force backward in separating brake process early stage, accelerate moving contact opening velocity, complete the quick acting switching-off of circuit breaker, improve the short circuit interruption performance of circuit breaker.
After rapid-releasing action completes, breaker open operation, tripping force F2 disappears, push rod combination can after power set drive effect under move backward, simultaneously push rod back-moving spring 19 drives insulation push rod 3 upwards to rotate around push rod rotating shaft 17, makes metal shift fork push rod 2 return to level, the making contact state with middle part pivot pin 4 is recovered in metal shift fork push rod 2 front end, prepare to close a floodgate work, i.e. Fig. 1 initial condition next time, now circuit breaker can again carry out closing a floodgate, separating brake action.
Described embodiment is preferred embodiment of the present invention; but the present invention is not limited to above-mentioned execution mode; when not deviating from flesh and blood of the present invention, any apparent improvement that those skilled in the art can make, replacement or modification all belong to protection scope of the present invention.
Claims (9)
1. a DC circuit breaker becomes rotating shaft structure of contact terminal, it is characterized in that, comprise the combination of moving contact (1), fixed contact outlet copper bar (14), the first spring mounting seat (12), lower outlet copper bar (9), pivot pin (6) and push rod, described moving contact (1) top is fixed with moving contact silver point (16), and described fixed contact outlet copper bar (14) is fixed with the fixed contact silver point (15) corresponding with described moving contact silver point (16); The middle part of described moving contact (1) is provided with middle part pivot pin (4), and described middle part pivot pin (4) is connected with described first spring mounting seat (12) by tripping spring (13); The bottom of described moving contact (1) is provided with bottom pivot pin (5), described lower outlet copper bar (9) is installed with the second spring mounting seat (10), and described bottom pivot pin (5) is connected by contact pressure spring (11) with described second spring mounting seat (10); The below of described moving contact (1) is also provided with mounting hole (7), and described pivot pin (6) is placed in described mounting hole (7); Described push rod combination comprises metal pushrod (18), insulation push rod (3) and metal shift fork push rod (2), described metal pushrod (18) is provided with push rod rotating shaft (17), described insulation push rod (3) is provided with the axis hole corresponding with push rod rotating shaft (17), and described insulation push rod (3) can rotate up and down around push rod rotating shaft (17).
2. a kind of DC circuit breaker according to claim 1 becomes rotating shaft structure of contact terminal, it is characterized in that, is provided with the push rod back-moving spring (19) vertically placed between described metal pushrod (18) end and insulation push rod (3).
3. a kind of DC circuit breaker according to claim 1 and 2 becomes rotating shaft structure of contact terminal, it is characterized in that, the below of described lower outlet copper bar (9) is fixedly connected with flexible connecting device (8), and the other end of described flexible connecting device (8) is fixed on the lower end of described moving contact (1).
4. a kind of DC circuit breaker according to claim 1 and 2 becomes rotating shaft structure of contact terminal, and it is characterized in that, described tripping spring (13) and contact pressure spring (11) are positioned at the homonymy of moving contact (1).
5. a kind of DC circuit breaker according to claim 1 and 2 becomes rotating shaft structure of contact terminal, and it is characterized in that, described tripping spring (13) belongs to Compress Spring.
6. a kind of DC circuit breaker according to claim 1 and 2 becomes rotating shaft structure of contact terminal, and it is characterized in that, described contact pressure spring (11) belongs to Compress Spring.
7. a kind of DC circuit breaker according to claim 3 becomes rotating shaft structure of contact terminal, it is characterized in that, described flexible connecting device (8) is flexible coupling for Copper Foil formula or copper weave belt.
8. a kind of DC circuit breaker according to claim 1 and 2 becomes rotating shaft structure of contact terminal, it is characterized in that, described fixed contact outlet copper bar (14), the first spring mounting seat (12), lower outlet copper bar (9) are all fixed in the cage of circuit breaker, pivot pin (6) position is fixed, irremovable.
9. a kind of DC circuit breaker according to claim 1 and 2 becomes rotating shaft structure of contact terminal, it is characterized in that, described fixed contact outlet copper bar (14), the first spring mounting seat (12), lower outlet copper bar (9) are insulating material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510053626.3A CN104681371A (en) | 2015-02-02 | 2015-02-02 | Variable rotating shaft contact structure for direct current circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510053626.3A CN104681371A (en) | 2015-02-02 | 2015-02-02 | Variable rotating shaft contact structure for direct current circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104681371A true CN104681371A (en) | 2015-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510053626.3A Pending CN104681371A (en) | 2015-02-02 | 2015-02-02 | Variable rotating shaft contact structure for direct current circuit breaker |
Country Status (1)
| Country | Link |
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| CN (1) | CN104681371A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108010791A (en) * | 2017-11-30 | 2018-05-08 | 浙江紫光电器有限公司 | A kind of disjunction mechanism of arc-chutes quick acting switching-off |
| CN108847378A (en) * | 2018-08-22 | 2018-11-20 | 天津市百利电气有限公司 | Moving contact of breaker device |
| CN109509687A (en) * | 2018-11-06 | 2019-03-22 | 安士缔(中国)电气设备有限公司 | A kind of short-circuit device applied to breaker |
| CN111668075A (en) * | 2020-07-06 | 2020-09-15 | 江苏大全高压开关有限公司 | Circuit breaker mechanism with locking device for preventing moving contact from separating brake and bouncing |
| CN111933477A (en) * | 2020-06-22 | 2020-11-13 | 华翔翔能科技股份有限公司 | Zero-flashover molded case circuit breaker |
| CN114649174A (en) * | 2020-12-21 | 2022-06-21 | 上海良信电器股份有限公司 | Moving contact system easy to install and assembling method thereof |
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| CN102891049A (en) * | 2012-10-29 | 2013-01-23 | 大全集团有限公司 | Contact structure of air circuit breaker |
| CN204102826U (en) * | 2014-08-12 | 2015-01-14 | 西安交通大学 | A kind of DC circuit breaker |
| CN204464214U (en) * | 2015-02-02 | 2015-07-08 | 大全集团有限公司 | A kind of DC circuit breaker becomes rotating shaft structure of contact terminal |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108010791A (en) * | 2017-11-30 | 2018-05-08 | 浙江紫光电器有限公司 | A kind of disjunction mechanism of arc-chutes quick acting switching-off |
| CN108010791B (en) * | 2017-11-30 | 2024-02-20 | 浙江紫光电器有限公司 | Breaking mechanism for quick breaking of arc extinguishing chamber |
| CN108847378A (en) * | 2018-08-22 | 2018-11-20 | 天津市百利电气有限公司 | Moving contact of breaker device |
| CN109509687A (en) * | 2018-11-06 | 2019-03-22 | 安士缔(中国)电气设备有限公司 | A kind of short-circuit device applied to breaker |
| CN109509687B (en) * | 2018-11-06 | 2024-01-19 | 安士缔(中国)电气设备有限公司 | Be applied to short circuit device of circuit breaker |
| CN111933477A (en) * | 2020-06-22 | 2020-11-13 | 华翔翔能科技股份有限公司 | Zero-flashover molded case circuit breaker |
| CN111668075A (en) * | 2020-07-06 | 2020-09-15 | 江苏大全高压开关有限公司 | Circuit breaker mechanism with locking device for preventing moving contact from separating brake and bouncing |
| CN114649174A (en) * | 2020-12-21 | 2022-06-21 | 上海良信电器股份有限公司 | Moving contact system easy to install and assembling method thereof |
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Application publication date: 20150603 |
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