CN202549757U

CN202549757U - Circuit breaker

Info

Publication number: CN202549757U
Application number: CN2012202238985U
Authority: CN
Inventors: 黄明光
Original assignee: WENZHOU NEW BLUE SKY ELECTRICAL CO Ltd
Current assignee: WENZHOU NEW BLUE SKY ELECTRICAL CO Ltd
Priority date: 2012-05-17
Filing date: 2012-05-17
Publication date: 2012-11-21
Anticipated expiration: 2022-05-17

Abstract

The utility model discloses a circuit breaker and aims at providing a circuit breaker capable of effectively protecting a movable contact and a static contact and prolonging the service life. According to the technical scheme, the circuit breaker is mainly characterized by comprising a housing, wherein an operating assembly, a contact assembly and an arc extinction assembly are arranged in the housing, the contact assembly consists of a movable contact and a static contact, the arc extinction assembly consists of an arc extinction chamber, the operating assembly drives the movable contact to be close to or away from the static contact, a partition is arranged in the housing, when the movable contact deviates from the static contact, and the partition enters a position between the movable contact and the static contact synchronously; and when the movable contact is close to the static contact, the partition is synchronously separated the position between the movable contact and the static contact. The utility model is applicable to circuit breakers with various models, especially small circuit breakers.

Description

Circuit breaker

Technical field

The utility model relates to a kind of circuit breaker.

Background technology

Circuit breaker, a kind of can closing closed, carried and cut-off the electric current under the normal loop condition, and can close the switching device that closes, in official hour, carries and cut-off the electric current under the unusual loop condition (comprising short circuit condition).

Circuit breaker can produce electric arc in the course of the work, and electric arc is the free body of high temperature high conductivity, and it not only has very big destruction to contact; And make the time lengthening of open circuit, in order to stop this process, in the design circuit breaker; Be contained in two contacts in the arc control device, there are many passages, the one, subdividing the arc in arc control device inside; The 2nd, the high pressure draught that utilizes high arc temperature to produce is blown out electric arc through the passage spout that arc control device are certain.Arc control device are core components of low tension switch, and after dynamic/static contact separated, electric arc got into arc control device fast under magnetic field force and aerodynamic effect; In this process; Electric arc causes the switch reduction in useful life thus with ablation electrode and wall on every side on the one hand, and electric arc is cut by the metal gate sheet under the effect of magnetic field airflow field on the other hand; Thereby boosted voltage, final disengagement failure electric current.

Such structure is provided with dynamic/static contact is separated, and also there is the gap between the dynamic/static contact in electric arc, does not in time get into arc control device, so still can damage contact, makes the time lengthening of open circuit.

Summary of the invention

To the deficiency that prior art exists, the purpose of the utility model is to provide a kind of can effectively protect dynamic/static contact, improve breaking capacity, the circuit breaker of the time that increases the service life.

For realizing above-mentioned purpose, the utility model provides following technical scheme: a kind of circuit breaker comprises shell; Be provided with operating assembly, contact assembly and arc extinguishing assembly in the said shell, said contact assembly comprises moving contact and fixed contact, and said arc extinguishing assembly includes arc control device; Operating assembly drive moving contact near or deviate from fixed contact; Be provided with dividing plate in the said shell, when moving contact deviated from fixed contact, dividing plate got between moving contact and the fixed contact synchronously; When moving contact during near fixed contact, dividing plate is from break away between moving contact and the fixed contact synchronously.

Through adopting technique scheme; When moving contact deviates from fixed contact, dividing plate places between moving contact and the fixed contact, and this just can make that in time not getting into the interior electric arc of arc control device is separated by the dividing plate pressure; Reach the arc blow-out ability of force disconnect electric arc, enhancing circuit breaker; So promote the breaking capacity of circuit breaker, thereby protected moving contact and fixed contact better, make increase the useful life of circuit breaker; When moving contact and fixed contact connect, dividing plate has broken away between moving contact and the fixed contact, and this makes that the work of circuit breaker is unaffected.

The utility model further is set to: said dividing plate is fixedly connected with the rotating shaft that can rotate in a circumferential direction along axis; The axis of said rotating shaft and the swinging track of moving contact are perpendicular; Said rotating shaft is fixedly connected with block, and said dividing plate and block place the both sides of moving contact respectively, and the first side of the corresponding movable contact of said block and dividing plate is provided with angle; Said angle is greater than 0 ° and less than 180 °, and dividing plate, block all are connected with moving contact.

Through adopting technique scheme; The further clear and definite manner of execution of dividing plate from getting into or break away between moving contact and the fixed contact; Be that dividing plate and block are a page gate-type structure setting, dividing plate is realized closing or opening between dynamic/static contact, and whether the switching of dividing plate depends on the state of moving contact; Reach force disconnect electric arc, strengthen the arc blow-out ability of circuit breaker, so promote the breaking capacity of circuit breaker.

The utility model further is set to: be provided with fixed head in the said shell; Said dividing plate is fixedly connected with guide vane end stop; Guide vane end stop is towards the first side setting of stationary contact, and dividing plate, block, guide vane end stop three all be mutual vertical stratification setting, and fixed head is provided with fixedly plate hole; When dividing plate broke away between moving contact and the fixed contact, guide vane end stop placed fixedly in the plate hole.

Through adopting technique scheme; When dividing plate breaks away between moving contact and the fixed contact; Guide vane end stop places fixedly in the plate hole, prevents can not connect fully because of moving contact and fixed contact that the rotating shaft revolution places dividing plate to cause between moving contact and the fixed contact again, makes structure more reasonable.

The utility model further is set to: said fixed head is provided with the counterpart that is used to place movable axis, and said counterpart is provided with the accommodation section, and the shape of described accommodation section is all suitable with size with the shape of movable axis with size.

Through adopting technique scheme, the shape of the accommodation section of setting is all suitable with size with the shape of movable axis with size, makes movable axis in the accommodation section, to rotate flexibly.

Description of drawings

Fig. 1 is the structural representation one of the utility model circuit breaker embodiment;

Fig. 2 is the A portion enlarged drawing of Fig. 1;

Fig. 3 is the structural representation two of the utility model circuit breaker embodiment;

Fig. 4 is the B portion enlarged drawing of Fig. 3;

Fig. 5 is the fit structure sketch map of fixed head, dividing plate, block and the guide vane end stop of the utility model circuit breaker embodiment.

Embodiment

Referring to figs. 1 through Fig. 5 the utility model circuit breaker embodiment is further specified.

To shown in Figure 4, a kind of circuit breaker comprises shell 1 like Fig. 1; Be provided with operating assembly 2, contact assembly 3 and arc extinguishing assembly 4 in the said shell 1, said contact assembly 3 comprises moving contact 31 and fixed contact 32, and said arc extinguishing assembly 4 includes arc control device 41; Operating assembly 2 drive moving contacts 31 near or deviate from fixed contact 32; Be provided with dividing plate 61 in the said shell 1, when moving contact 31 deviated from fixed contact 32, dividing plate 61 got between moving contact 31 and the fixed contact 32 synchronously; When moving contact 31 during near fixed contact 32, dividing plate 61 is from break away between moving contact 31 and the fixed contact 32 synchronously.

Through adopting technique scheme; When moving contact 31 deviates from fixed contact 32; Dividing plate 61 places between moving contact 31 and the fixed contact 32; This just can make the electric arc that does not in time get in the arc control device 41 forced to separate by dividing plate 61, thereby has protected moving contact 31 and fixed contact 32 better, makes increase the useful life of circuit breaker; When moving contact 31 and fixed contact 32 connect, dividing plate 61 has broken away between moving contact 31 and the fixed contact 32, and this makes that the work of circuit breaker is unaffected.

Said dividing plate 61 is fixedly connected with the rotating shaft 63 that can rotate in a circumferential direction along axis; The swinging track of the axis of said rotating shaft 63 and moving contact 31 is perpendicular; Said rotating shaft 63 is fixedly connected with block 62, and said dividing plate 61 and block 62 place the both sides of moving contact 31 respectively, and said block 62 is provided with angle with dividing plate 61 corresponding moving contact 31 1 sides; Said angle is greater than 0 ° and less than 180 °, and dividing plate 61, block 62 all are connected with moving contact 31.

Through adopting technique scheme, the further clear and definite manner of execution of dividing plate 61 from getting into or break away between moving contact 31 and the fixed contact 32, simple in structure, do not influence the volume of circuit breaker.

Be provided with fixed head 5 in the said shell 1, said dividing plate 61 is fixedly connected with guide vane end stop 64, and guide vane end stop 64 is towards fixed contact 32 1 side settings; And dividing plate 61, block 62, guide vane end stop 64 threes all are mutual vertical stratification setting, and (what need explain is that the angle between the angle between said dividing plate 61 and the block 62, dividing plate 61 and the guide vane end stop 64 is greater than 0 ° and less than 180 °, for making the best results of dividing plate 61 here; Present embodiment is preferred, and described angle is 90 ° of settings), fixed head 5 is provided with fixedly plate hole 51; When dividing plate 61 breaks away between moving contacts 31 and the fixed contact 32, guide vane end stop 64 place fixedly in the plate hole 51 (what need explain is here, described guide vane end stop 64 and fixedly plate hole 51 can not do setting; If rotating shaft 63 velocities of rotation are too fast, can be after dividing plate 61 and fixed head 5 are parallel because inertia can continue rotation since fixed head 5 be arranged so that dividing plate 61 can can't continue to rotate along same direction; Possibly also can turn round along contrary direction, if rotating shaft 63 revolutions, dividing plate 61 will break away between moving contact 31 and the fixed contact 32 fully; Moving contact 31 can can't contact with fixed contact 32; So for making structure more reasonable, present embodiment is preferred, fixed head 5 is provided with fixedly plate hole 51; When dividing plate 61 broke away between moving contacts 31 and the fixed contact 32, guide vane end stop 64 placed that fixedly plate hole 51 is interior).

Through adopting technique scheme; When dividing plate 61 breaks away between moving contact 31 and the fixed contact 32; Guide vane end stop 64 places fixedly in the plate hole 51; Prevent to connect fully with fixed contact 32, make structure more reasonable because of the moving contact 31 that rotating shaft 63 revolution places dividing plate 61 to cause between moving contact 31 and the fixed contact 32 again.

Said fixed head 5 is provided with the counterpart 52 that is used to place movable axis, and said counterpart 52 is provided with accommodation section 521, and the shape of described accommodation section 521 and size are all with the shape of movable axis with big or small suitable (what need explain is here; Can on fixed head 5, directly be provided with one with the shape of rotating shaft 63 and the suitable depressed part of size; Rotating shaft 63 is rotated in depressed part, and for improve the flexibility that rotating shaft 63 is rotated in accommodation section 521, present embodiment is preferred; Counterpart 52 is set on fixed head 5; Movable axis is rotated in the accommodation section 521 of counterpart 52, and wherein counterpart 52 can be one, and the accommodation section 521 of this counterpart 52 can place the middle part of rotating shaft 63; Also can be for suitable with rotating shaft 63 length; For guaranteeing that rotating shaft 63 described counterparts 52 alive are provided with two, each counterpart 52 is provided with accommodation section 521, and the accommodation section 521 of two counterparts 52 places the two ends of rotating shaft 63 respectively).

Operation principle: operating mechanism drives moving contact 31 swings; When moving contact 31 deviated from fixed contact 32 motions, moving contact 31 drove block 62 motions, owing to block 62, dividing plate 61 all are fixedly connected with rotating shaft 63; Block 62 motions drive rotating shaft 63 and rotate; Thereby dividing plate 61 motion, when promptly having reached moving contact 31 and deviating from fixed contact 32, dividing plate 61 gets into the purposes between moving contacts 31 and the fixed contact 32 synchronously; When moving contact 31 during near fixed contact 32 motion, moving contact 31 drives dividing plates 61 motions, up to moving contact 31 fully and fixed contact 32 when connecting; Dividing plate 61 laterally arranges with fixed head 5; When promptly having reached moving contact 31 near fixed contact 32, dividing plate 61 breaks away from the purposes between moving contacts 31 and the fixed contact 32 synchronously, and guide vane end stop 64 can place fixedly in the plate hole 51 at this moment fully; This can prevent rotating shaft 63 revolutions, influences the energising work of circuit breaker.

Claims

1. a circuit breaker comprises shell, is provided with operating assembly, contact assembly and arc extinguishing assembly in the said shell; Said contact assembly comprises moving contact and fixed contact; Said arc extinguishing assembly includes arc control device, operating assembly drive moving contact near or deviate from fixed contact, it is characterized in that: be provided with dividing plate in the said shell; When moving contact deviated from fixed contact, dividing plate got between moving contact and the fixed contact synchronously; When moving contact during near fixed contact, dividing plate is from break away between moving contact and the fixed contact synchronously.

2. circuit breaker according to claim 1; It is characterized in that: said dividing plate is fixedly connected with the rotating shaft that can rotate in a circumferential direction along axis, and the axis of said rotating shaft and the swinging track of moving contact are perpendicular, and said rotating shaft is fixedly connected with block; Said dividing plate and block place the both sides of moving contact respectively; The first side of the corresponding movable contact of said block and dividing plate is provided with angle, and said angle is greater than 0 ° and less than 180 °, and dividing plate, block all are connected with moving contact.

3. circuit breaker according to claim 2; It is characterized in that: be provided with fixed head in the said shell, said dividing plate is fixedly connected with guide vane end stop, and guide vane end stop is towards the first side setting of stationary contact; And dividing plate, block, guide vane end stop three all are mutual vertical stratification setting; Fixed head is provided with fixedly plate hole, and when dividing plate broke away between moving contact and the fixed contact, guide vane end stop placed fixedly in the plate hole.

4. circuit breaker according to claim 3 is characterized in that: said fixed head is provided with the counterpart that is used to place movable axis, and said counterpart is provided with the accommodation section, and the shape of described accommodation section is all suitable with size with the shape of movable axis with size.