CN102270553B - Rapid repulsion tripping mechanism for direct-current circuit breaker and tripping method thereof - Google Patents
Rapid repulsion tripping mechanism for direct-current circuit breaker and tripping method thereof Download PDFInfo
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- CN102270553B CN102270553B CN 201110185761 CN201110185761A CN102270553B CN 102270553 B CN102270553 B CN 102270553B CN 201110185761 CN201110185761 CN 201110185761 CN 201110185761 A CN201110185761 A CN 201110185761A CN 102270553 B CN102270553 B CN 102270553B
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- circuit breaker
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Abstract
The invention discloses a rapid repulsion tripping mechanism for a direct-current circuit breaker and a tripping method thereof. The repulsion-tray tripping mechanism has high response speed and small dispersivity and is not affected by the changes of external short-circuit current during the motion process. A tripping pusher is directly driven to rapidly trip by an electromagnetic repulsion force which is generated due to the eddy current effect of an alternating magnetic field in an electromagnetic repulsion tray. The instantaneous eddy-current electromagnetic force generated by the repulsion tray is large, and the direct-drive design significantly reduces intermediate mechanism links and reduces the qualities of moving components, so that the action speed of the direct-current circuit breaker is effectively increased and the inherent opening time of the circuit breaker is greatly shortened. Besides, the repulsion tray has a compact structure and a small size, the spatial distribution of the circuit breaker is fully utilized and optimized to reduce the size of the circuit breaker.
Description
Technical field
The present invention relates to a kind of quick-tripping device that is applied to dc circuit breaker, particularly a kind of dc circuit breaker quick-release mechanism that utilizes repulsion dish principle.
Background technology
Contacting of DC power-supply system and people's daily life is more and more tightr, has all adopted DC power-supply system in many important industries such as China's city trolley bus, subway, smelting, chemical industry, stocking, ship electricity, mine at present.Wherein, dc circuit breaker is the assurance of DC power-supply system safe operation, has the defencive function of reliable cut-out DC loop fault electric current.Along with China's economy develops rapidly and the modernization progressively of industrial traffic department, also more and more stricter to the requirement of electric power system reliability, direct current power load capacity also continues to increase, and has caused thus its break performance has been proposed more and more higher requirement.Simultaneously, along with the increase of electric pressure and rated current, cut-offfing of high-capacity direct current short circuit current becomes difficult unusually, and the requirement of its switch off time is also more and more harsher.Release is component part important in the circuit breaker, and the response of release and run duration will directly influence segmentation speed and the break performance of whole circuit breaker in the interrupting process.Reduce drop-away time and intrinsic opening time and will directly reduce the time that dc circuit breaker cut-offs fault current, therefore significant for the rapid-releasing ability proposition requirements at the higher level of dc circuit breaker.
At present, the research that utilizes eddy current to produce the switch operating mechanism of electromagnetic repulsion force principle is quietly risen. and in the ultrashort time, can drive the QA characteristic of load with it. causing aspect the high-speed switch research that people pay close attention to greatly.Various countries' electric field has all had certain progress to the rapid-releasing that utilizes the vortex principle design at present.Repulsive force mechanism is at other similar means that is better than with the obvious advantage aspect pickup time, initial acceleration and the bulk velocity.These advantages are conducive to switch that synchro switch, high pressure quick converting switch etc. need high speed operation and develop towards the direction of better performance. need also to be conducive to the better expansion of the high-voltage switch gear experiment of high speed operation simultaneously.Usually electromagnet tripping device and kindred organization's movement velocity of usefulness are slow, because the logical short-circuit current of coil midstream, so be subjected to the influence of short circuit current size in the motion process constantly.In addition, this class electromagnetic repulsion force cut-offs mechanism and comprises switching winding, several sections such as closing coil and metal dish, and volume is bigger, is difficult for convenient its space placement location of arranging.This also is need an improved aspect for the electromagnetic repulsion force mechanism of dc circuit breaker rapid-releasing.
Summary of the invention
The objective of the invention is to: utilize the repulsion dish, design and provide a kind of and can improve dc circuit breaker short circuit current breaking speed and device simple in structure.
The quick repulsion tripping mechanism of a kind of dc circuit breaker comprises that metal dish, current coil, driving connecting rod, dropout push mechanism, dropout push rod, repulsion dish, snap close keep spring, dropout card, spring strut, draw-in groove, fixed contact, moving contact, movable contact rod, axle and tripping spring;
Be provided with metal dish and current coil in the described repulsion dish, the capacitor discharging circuit of the external thyristor control of current coil;
Described metal dish below arranges current coil, is provided with the gap between metal dish and the current coil;
Described metal dish is connected with the dropout push mechanism of top projection by driving connecting rod, is provided with two parallel dropout push rods above the dropout push mechanism;
Described dropout push rod one end connects snap close and keeps spring, the other end to connect spring strut, is provided with draw-in groove in the middle of the dropout push rod;
Described draw-in groove and the dropout card clamping that is arranged on the movable contact rod, this movable contact rod bottom is connected with tripping spring, and this movable contact rod top is provided with moving contact, is provided with fixed contact with the moving contact corresponding position; Described movable contact rod is provided with axle.
Dropout method based on the quick repulsion tripping mechanism of described dc circuit breaker:
Draw-in groove and the dropout at dropout push rod middle part withhold during the snap close state, and dropout push rod right-hand member is connected with spring strut, and left end keeps spring that downward pulling force is provided by a snap close, guarantee that the snap close under this state keeps reliability; This moment moving contact and fixed contact tight closure; Tripping spring is in compressive state, provides thrust to the movable contact rod bottom; But because snap action, can't separating brake;
In the dc circuit breaker breaking course, put the transient state dc pulse current by the capacitor that thyristor control has been charged to the current coil of repulsion dish, produce quick instantaneous variation magnetic field in the repulsion disk space; Induction produces eddy current in the metal dish of current coil top, and the eddy current direction is identical with coil current, thereby forms the opposing magnetic field, produces great electromagnetic repulsion force of moment upwards; Metal dish drives rigidly connected driving connecting rod and push mechanism simultaneously and moves upward fast together owing to the effect of great electromagnetic repulsion force of this moment moves upward fast; In the push mechanism rapid movement process, jack-up dropout push rod makes progress;
Dropout push rod left end is pushed parts fast upwards by jack-up, and right-hand member rotates around axially going up of being connected with frame, and its middle part draw-in groove and snap close snap close card are thrown off, the rapid-releasing success; After threading off successfully, movable contact rod owing to be subjected to is in the thrust of the tripping spring of compressive state, moves clockwise around axle, drives moving contact and opens, and tripping spring discharges, the breaker open operation success.
This device trip speed is fast, and the time error of each operation is very little simultaneously, is convenient to control.Since the special-purpose capacitor discharging circuit of the external thyristor control of repulsion dish coil, the influence that repulsion dish motion process is not subjected to the short circuit current size and changes, and the repulsion dish is simple and compact for structure, is easy to optimize the space and lays layout.
Description of drawings
Fig. 1 is the vertical section structural map of snap close state repulsion dish and release member annexation.
Mechanism's end view when Fig. 2 is "on" position.
Fig. 3 is the vertical section structural map of trip status repulsion dish and release member annexation.
Mechanism's end view when Fig. 4 is gate-dividing state.
Wherein: 1 is metal dish; 2 is current coil; 3 for driving connecting rod; 4 are the dropout push mechanism; 5 are the dropout push rod; 6 is the repulsion dish; 7 are snap close maintenance spring; 8 are the card of threading off; 9 is spring strut; 10 is draw-in groove; 11 is fixed contact; 12 is moving contact; 13 is movable contact rod; 14 is axle; 15 is tripping spring.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
Referring to Fig. 1, thisly apply to utilize in the dc circuit breaker rapid-releasing machine design of repulsion dish to comprise the repulsion dish, drive connecting rod, dropout push mechanism, dropout push rod.Repulsion disc portion wherein, current coil and metal dish (material can be chosen copper or aluminium) are encapsulated in the repulsion disk casing, place up and down, and certain interval is arranged between the two.The external electric capacity direct-current discharge circuit by thyristor control of current coil, its electric capacity have been substituted the bad for the good and have been fit to the voltage of grade.
Referring to Fig. 2, draw-in groove and the dropout at dropout push rod middle part withhold during the snap close state, and the push rod right-hand member is connected with spring strut, and left end keeps spring that downward pulling force is provided by a snap close, guarantee that the snap close under this state keeps reliability.This moment moving contact and fixed contact tight closure.Tripping spring is in compressive state, provides thrust to the movable contact rod bottom.But because snap action, can't separating brake.
Referring to Fig. 3, in the dc circuit breaker breaking course, put the transient state dc pulse current by the capacitor that thyristor control has been charged to the current coil of repulsion dish, produce quick instantaneous variation magnetic field in the repulsion disk space.Induction produces eddy current in the metal dish of current coil top, and the eddy current direction is identical with coil current, thereby forms the opposing magnetic field, produces great electromagnetic repulsion force of moment upwards.Metal dish drives rigidly connected driving connecting rod and push mechanism simultaneously and moves upward fast together owing to the effect of great electromagnetic repulsion force of this moment moves upward fast.In the push mechanism rapid movement process, jack-up dropout push rod makes progress.
Referring to Fig. 4, dropout push rod left end is pushed parts fast upwards by jack-up, and right-hand member rotates around axially going up of being connected with frame, and its middle part draw-in groove and snap close snap close card are thrown off, the rapid-releasing success.After threading off successfully, movable contact rod owing to be subjected to is in the thrust of the tripping spring of compressive state, moves clockwise around axle, drives moving contact and opens, and tripping spring discharges certain-length.The breaker open operation success.
Above content is to further describing that the present invention does in conjunction with concrete preferred implementation; can not assert that the specific embodiment of the present invention only limits to this; for the general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; can also make some simple deduction or replace, all should be considered as belonging to the present invention and determine scope of patent protection by claims of submitting to.
Claims (2)
1. quick repulsion tripping mechanism of dc circuit breaker is characterized in that:
Comprise that metal dish, current coil, driving connecting rod, dropout push mechanism, dropout push rod, repulsion dish, snap close keep spring, dropout card, spring strut, draw-in groove, fixed contact, moving contact, movable contact rod, axle and tripping spring;
Be provided with metal dish and current coil in the described repulsion dish, the capacitor discharging circuit of the external thyristor control of current coil;
Described metal dish below arranges current coil, is provided with the gap between metal dish and the current coil;
Described metal dish is connected with the dropout push mechanism of top projection by driving connecting rod, is provided with two parallel dropout push rods above the dropout push mechanism;
Described dropout push rod one end connects snap close and keeps spring, the other end to connect spring strut, is provided with draw-in groove in the middle of the dropout push rod;
Described draw-in groove and the dropout card clamping that is arranged on the movable contact rod, this movable contact rod bottom is connected with tripping spring, and this movable contact rod top is provided with moving contact, is provided with fixed contact with the moving contact corresponding position; Described movable contact rod is provided with axle.
2. based on the unhook method of the quick repulsion tripping mechanism of the described dc circuit breaker of claim 1, it is characterized in that:
Draw-in groove and the dropout at dropout push rod middle part withhold during the snap close state, and dropout push rod right-hand member is connected with spring strut, and left end keeps spring that downward pulling force is provided by a snap close, guarantee that the snap close under this state keeps reliability; This moment moving contact and fixed contact tight closure; Tripping spring is in compressive state, provides thrust to the movable contact rod bottom; But because snap action, can't separating brake;
In the dc circuit breaker breaking course, put the transient state dc pulse current by the capacitor that thyristor control has been charged to the current coil of repulsion dish, produce quick instantaneous variation magnetic field in the repulsion disk space; Induction produces eddy current in the metal dish of current coil top, and the eddy current direction is identical with coil current, thereby forms the opposing magnetic field, produces great electromagnetic repulsion force of moment upwards; Metal dish drives rigidly connected driving connecting rod and dropout push mechanism simultaneously and moves upward fast together owing to the effect of great electromagnetic repulsion force of this moment moves upward fast; In the dropout push mechanism rapid movement process, jack-up dropout push rod makes progress;
Dropout push rod left end is threaded off push mechanism fast upwards by jack-up, and right-hand member rotates around axially going up of being connected with frame, and the draw-in groove at its middle part is thrown off with the card of threading off, the rapid-releasing success; After threading off successfully, movable contact rod owing to be subjected to is in the thrust of the tripping spring of compressive state, moves clockwise around axle, drives moving contact and opens, and tripping spring discharges, the breaker open operation success.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110185761 CN102270553B (en) | 2011-07-04 | 2011-07-04 | Rapid repulsion tripping mechanism for direct-current circuit breaker and tripping method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110185761 CN102270553B (en) | 2011-07-04 | 2011-07-04 | Rapid repulsion tripping mechanism for direct-current circuit breaker and tripping method thereof |
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| Publication Number | Publication Date |
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| CN102270553A CN102270553A (en) | 2011-12-07 |
| CN102270553B true CN102270553B (en) | 2013-07-03 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102592897B (en) * | 2012-02-22 | 2013-07-03 | 西安交通大学 | DC (direct current) circuit breaker rapid operating mechanism with current limiting characteristic |
| CN102592902B (en) * | 2012-02-22 | 2013-07-17 | 西安交通大学 | High-speed opening operation mechanism of middle-and-low-voltage direct-current circuit breaker |
| CN103515158B (en) * | 2012-06-25 | 2015-08-12 | 李树民 | 10kv high-voltage elastic switch |
| CN104681371A (en) * | 2015-02-02 | 2015-06-03 | 大全集团有限公司 | Variable rotating shaft contact structure for direct current circuit breaker |
| CN107706010B (en) * | 2017-11-22 | 2018-12-11 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | A kind of high-speed switch holding mechanism |
| CN108010818B (en) * | 2017-11-28 | 2019-01-18 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | A kind of fast operating mechanism locker |
| CN110103744B (en) * | 2019-06-21 | 2023-11-21 | 天津工业大学 | Metal foreign body driving device for wireless charging system of electric automobile |
| CN112735907B (en) * | 2020-12-30 | 2024-01-23 | 安徽徽电科技股份有限公司 | Circuit breaker based on self-driving principle |
| CN114141587B (en) * | 2021-11-03 | 2022-12-27 | 西安交通大学 | Circuit breaker and method for manufacturing same |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB113150A (en) * | 1917-02-15 | 1918-02-14 | British Thomson Houston Co Ltd | Improvements in and relating to Electromagnetic Switches. |
| US6353377B1 (en) * | 1998-12-22 | 2002-03-05 | Square D Company | Trip assembly for circuit breakers with shock absorbing components |
| CN2510987Y (en) * | 2001-10-18 | 2002-09-11 | 严洪启 | Separate-exciting electrical apparatus release for circuit breaker |
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