CN204189738U - Circuit breaker - Google Patents
Circuit breaker Download PDFInfo
- Publication number
- CN204189738U CN204189738U CN201420677056.6U CN201420677056U CN204189738U CN 204189738 U CN204189738 U CN 204189738U CN 201420677056 U CN201420677056 U CN 201420677056U CN 204189738 U CN204189738 U CN 204189738U
- Authority
- CN
- China
- Prior art keywords
- snap close
- circuit breaker
- arc
- moving contact
- groove
- Prior art date
- 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.)
- Active
Links
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model discloses a kind of circuit breaker, comprise operating mechanism and arc quenching system, described operating mechanism comprises handle, moving contact, one end offers the snap close of snap close groove, the moving contact rack that one end is fixedly connected with described moving contact, the other end of described moving contact rack offers rack groove, and the handle push rod that one end is connected with described handle, its other end is placed in described snap close groove and rack groove, described snap close and described moving contact rack can be driven when described handle push rod slides in snap close groove and rack groove to rotate, and the width of rebate that during breaker closing, snap close groove and rack groove are formed is less than the width of handle push rod, described arc quenching system comprises arc control device and arc striking component, and described arc control device are provided with and are communicated to lower exhaust outlet outside pedestal and upper exhaust outlet respectively.The circuit breaker that this practicality newly provides, between operating mechanism each parts, frictional force is less, and circuit breaker is longer for useful life, and the high temperature and high pressure gas velocity of discharge is fast, and cooling down is effective.
Description
Technical field
The utility model relates to technical field of electric equipment, more particularly, relates to a kind of circuit breaker.
Background technology
Circuit breaker, is also called switch, refer to the electric current that can close, carry and cut-off under normal loop condition and can close, the switching device of carrying and the electric current under cut-offfing abnormal loop condition in official hour.Common circuit breaker is many to be made up of parts such as contact system, arc quenching system, operating mechanism, release, shells.Drive moving contact motion by operating mechanism, realize the contact of moving contact and fixed contact or be separated, making breaker closing or disconnection.In circuit breaker breaking course, the voltage between moving contact and fixed contact will cause air dielectric to discharge, and form electric arc.Extinguish arcs is carried out, to guarantee the reliability service of circuit breaker by arc quenching system.
Existing circuit breaker operation mechanism is many to be made up of parts such as handle, snap close, tripping, moving contacts, and thus usually structure is comparatively complicated and reliability is lower.Existing arc extinguishing system of circuit breaker mainly comprises the parts such as arc control device, arc striking component.Usually, arc control device comprise again arc-extinguish chamber opposite each other, multiple arc-chute parallel side-by-side be arranged in arc-extinguish chamber, the bottom of arc control device side is provided with exhaust outlet, and exhaust outlet is communicated to bottom circuit breaker base more.The opposite side of arc control device, usually relatively arrange arc separating wall, arc striking component is arranged between relative arc separating wall, introduces arc control device in order to the electric arc produced at fixed contact place by Jing Paohu road, and fixed contact is connected with stationary contact bar usually, the stationary contact bar other end extends to arc-chute top.In circuit breaker disconnection or closing course, contact because snap close and tripping mostly are face, frictional force is larger.By fretting wear, common circuit breaker generally can only use 4000 times, and minority useful life, longer circuit breaker also can only reach 10,000 times.Meanwhile, when arc energy causes the gas temperature in arc control device and pressure to raise, high temperature and high pressure gas is comparatively slow by unique exhaust outlet discharge rate, makes the cooling down effect of arc quenching system poor, and then affects arc extinguishing efficiency.
In sum, how effectively to solve frictional force between circuit breaker tripping process operation mechanism each parts larger, thus make that circuit breaker useful life is shorter, reliability is poor, and the problem such as the lower cooling down effect caused of high temperature and high pressure gas rate of discharge in arc extinguishing system of circuit breaker is poor, be current those skilled in the art's urgent problem.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of circuit breaker, it is larger that this circuit breaker can solve frictional force between circuit breaker tripping process operation mechanism each parts effectively, thus make that circuit breaker useful life is shorter, reliability is poor, and the problem such as the lower cooling down effect caused of high temperature and high pressure gas rate of discharge in arc extinguishing system of circuit breaker is poor, be current those skilled in the art's urgent problem.
In order to achieve the above object, the utility model provides following technical scheme:
A kind of circuit breaker, comprise operating mechanism and arc quenching system, described operating mechanism comprises handle and moving contact; Described arc quenching system comprises arc control device and arc striking component, and described arc control device comprise the arc-chute that multiple parallel side-by-side is arranged; Described operating mechanism comprises further:
One end offers the snap close of snap close groove;
The moving contact rack that one end is fixedly connected with described moving contact, the other end of described moving contact rack offers rack groove;
Handle push rod, one end of described handle push rod is connected with described handle, the other end is placed in described snap close groove and rack groove, described snap close and described moving contact rack can be driven when described handle push rod slides in snap close groove and rack groove to rotate, and the width of rebate that during this breaker closing, described snap close groove and described rack groove are formed is less than the width of handle push rod;
The bottom of arc control device side and top are respectively equipped with the lower exhaust outlet of the pedestal outside being communicated to described circuit breaker and are communicated to the upper exhaust outlet of described pedestal outside.
Preferably, in above-mentioned circuit breaker, comprise further be communicated with described lower exhaust outlet first cushion cavity, and described first buffering cavity connects is outside to pedestal.
Preferably, in above-mentioned circuit breaker, comprise further be communicated with described upper exhaust outlet second cushion cavity, and described second buffering cavity connects is outside to pedestal.
Preferably, in above-mentioned circuit breaker, the length of at least one arc-chute near stationary contact bar in described arc control device is less than other arc-chutes.
Preferably, in above-mentioned circuit breaker, comprise the opposite each other arc separating wall being arranged at arc control device side further, described arc separating wall offers arc separating wall groove.
Preferably, in above-mentioned circuit breaker, the side of described snap close notch is provided with snap close boss.
Preferably, in above-mentioned circuit breaker, comprise the pull bar that one end is connected with snap close further, the other end and the bimetal leaf of described pull bar offset.
Preferably, in above-mentioned circuit breaker, comprise snap close back-moving spring further, and described snap close offers snap close cavity, described snap close back-moving spring is placed in described snap close cavity, during breaker closing, described snap close back-moving spring deforms, and produces the power that snap close is rotated to circuit breaker open position direction.
Preferably, in above-mentioned circuit breaker, comprise support back-moving spring further, and described moving contact rack offers support cavity, described support back-moving spring is placed in described support cavity, during breaker closing, described support back-moving spring deforms, and produces the power that moving contact rack is rotated to circuit breaker open position direction.
Preferably, in above-mentioned circuit breaker, the notch inwall of described snap close groove is provided with projection, with jam handle push rod.
Preferably, in above-mentioned circuit breaker, one end of described moving contact offers circular hole, described moving contact rack is provided with the boss coordinated with described circular hole, and is fixedly connected with moving contact by touch spring.
The circuit breaker that the utility model provides, comprises operating mechanism and arc quenching system.Wherein, operating mechanism comprises handle, moving contact, snap close, moving contact rack and handle push rod.One end of handle push rod is connected with handle, the other end is placed in the snap close groove of snap close and the rack groove of moving contact rack, snap close and moving contact rack is driven to rotate when handle push rod slides in above-mentioned groove, and the width of rebate that snap close groove and rack groove are formed jointly is decreased to when this breaker closing the width being less than handle push rod, moving contact is connected on moving contact rack, rotates with moving contact rack.Arc quenching system comprises arc control device, arc striking component, and described arc control device comprise the arc-chute of the setting of multiple parallel side-by-side, and described arc control device are respectively arranged with and are communicated to lower exhaust outlet outside the pedestal of this circuit breaker and upper exhaust outlet.
The circuit breaker that application the utility model provides, when circuit breaker is switched to closure state by off-state, under external force, can slide and offset with groove inner wall in one end that handle push rod is placed in the snap close groove of snap close and the rack groove of moving contact rack in groove, and then promote snap close and moving contact rack and rotate, until the moving contact be connected with moving contact rack contacts with fixed contact, connect circuit, and the width of rebate that now snap close groove and rack groove are formed is less than the width of handle push rod.When circuit breaker is switched to off-state by closure state, moving contact is separated with fixed contact, and snap close and moving contact rack rotate.Above-mentioned disconnection or closed time, in the process that snap close and moving contact rack rotate, handle push rod and producing between snap close and moving contact rack rubs, and is linear contact lay between handle push rod and snap close and moving contact rack, and then frictional force is less, extend its useful life.Under normal circumstances, the circuit breaker of the circuit breaker operation mechanism that application the utility model provides can use 20,000 times, and generally can only use than common circuit breaker has significant raising 4000 times.The circuit breaker that the utility model provides, its operating mechanism only comprises snap close and moving contact rack two parts except moving contact and handle, and the parts of whole operating mechanism are less, and structure is simple, and then reliability improves.And when the arc energy in circuit breaker causes the gas temperature in arc control device and pressure to raise, high temperature and high pressure gas is except discharging through lower exhaust outlet, can also discharge through upper exhaust outlet, simultaneously, the setting of upper and lower exhaust outlet is more conducive to the flowing of gas, thus effectively raise the discharge rate of high temperature and high pressure gas, make arc quenching system cooling down better effects if, and then improve arc extinguishing efficiency.And can discharge outside the housing of circuit breaker fast due to high temperature and high pressure gas, and take full advantage of the effectiveness of arc-chute, improve arc voltage.
In a preferred embodiment, the arc extinguishing system of circuit breaker that the utility model provides is provided with the first buffering cavity and the second buffering cavity respectively at lower exhaust outlet and upper exhaust ports, and the pedestal that high temperature and high pressure gas is expelled to circuit breaker again through above-mentioned buffering cavity is outside.High temperature and high pressure gas expanded by heating, buffering cavity due to its volume larger, for expanding gas provides the sufficient flowing space, avoid gas expansion and cause the compressing of circuit breaker base or arc quenching system etc. is even damaged, improve the security reliability of circuit breaker and arc quenching system thereof.
In another preferred embodiment, the circuit breaker that the utility model provides, the side of its snap close notch is provided with boss.On the one hand, drive in snap close rotary course at handle push rod, push rod and boss sidewall offset to make it rotate; On the other hand, boss the realization can guaranteeing operating mechanism trip free function is set, and ensure that handle push rod successfully slides into the rack groove of contact supporting in snap close groove, namely ensure that the quick acting of operating mechanism energy, also improves the intensity of snap close groove simultaneously.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
A kind of embodiment of circuit breaker that Fig. 1 provides for the utility model is at the general assembly structural representation of off-state;
A kind of embodiment of circuit breaker that Fig. 2 provides for the utility model is at the general assembly structural representation of closure state;
The structural representation of the arc quenching system of the circuit breaker that Fig. 3 provides for Fig. 1;
The exploded perspective view of the operating mechanism of the circuit breaker that Fig. 4 provides for Fig. 1;
The assembling schematic diagram of the operating mechanism of the circuit breaker that Fig. 5 provides for Fig. 1.
In accompanying drawing, mark is as follows:
Pedestal 1, handle 2, handle push rod 3, handle spring 4, moving contact rack 5, snap close 6, support back-moving spring 7, bearing pin 8, snap close back-moving spring 9, touch spring 10, moving contact 11, pull bar 12, fixed contact 13, bimetal leaf 14, snap close boss 15, arc control device 16, arc striking component 17, lower exhaust outlet 18, upper exhaust outlet 19, first cushions cavity 20, second and cushions cavity 21, arc-chute 22, magnetic conductive iron sheet 23, arc separating wall 24, arc separating wall groove 25, stationary contact bar 26, arc-extinguish chamber 27, first arc-chute 221, second arc-chute the 222, three arc-chute 223.
Embodiment
The utility model embodiment discloses a kind of circuit breaker, to reduce the frictional force between each parts of operating mechanism, thus extends circuit breaker useful life, accelerates the high temperature and high pressure gas velocity of discharge in arc quenching system simultaneously, improves cooling down effect.
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1-Fig. 5, a kind of embodiment of circuit breaker that Fig. 1 provides for the utility model is at the general assembly structural representation of off-state; A kind of embodiment of circuit breaker that Fig. 2 provides for the utility model is at the general assembly structural representation of closure state; The structural representation of the arc quenching system of the circuit breaker that Fig. 3 provides for Fig. 1; The exploded perspective view of the operating mechanism of the circuit breaker that Fig. 4 provides for Fig. 1; The assembling schematic diagram of the operating mechanism of the circuit breaker that Fig. 5 provides for Fig. 1.
In a kind of embodiment, the circuit breaker that the utility model provides comprises operating mechanism and arc quenching system.Wherein, operating mechanism comprises handle 2, handle push rod 3, moving contact 11, moving contact rack 5 and snap close 6, and arc quenching system comprises arc control device 16 and arc striking component 17.
The disjunction of circuit breaker is all realized by operating grip 2.Handle 2 is fixedly installed in circuit breaker base 1, and concrete can be fixed by handle spring 4, and handle 2 can along axle rotation to a certain degree.The shape and structure of handle 2 and concrete fixed form etc., with reference to prior art, repeat no more herein.
One end of handle push rod 3 is connected with handle 2, concrete, handle 2 can be offered porose, and one end of handle push rod 3 is inserted in above described holes.When handle 2 rotates, handle push rod 3 is driven to move.Certainly, handle push rod 3 and handle 2 also can adopt the connected mode of other routines to be connected, as hinged etc.Handle push rod 3 is generally U-shaped bar, certainly also can adopt other shapes, only needs can realize handle 2 to the transmission between snap close 6 and moving contact rack 5.
One end of snap close 6 offers snap close groove, and one end of moving contact rack 5 offers rack groove, and snap close groove matches with rack groove.The other end of handle push rod 3 is placed in the middle of snap close groove and rack groove.Handle push rod 3 slides in snap close groove and rack groove with the rotation of handle, and can offset with the inwall of snap close groove and rack groove when sliding into a certain degree, and then with the further rotation of handle 2, handle push rod 3 promotes snap close 6 and rotates with moving contact rack 5, contacts with fixed contact 13 to make moving contact 11.When circuit breaker is in closure state, the width of rebate that snap close groove and rack groove are formed is decreased to the width being less than handle push rod 3, with jam handle push rod 3, and then circuit breaker is remained on closure state.
Moving contact 11 is connected on moving contact rack 5, can rotate with moving contact rack 5, thus can contact with fixed contact 13 or be separated to switch on or off circuit, reaches disjunction object.
Arc control device 16 generally include arc-extinguish chamber 27, arc-chute 22, and what arc-extinguish chamber 27 was relative is arranged at upper and lower two end faces, and arc-chute 22 is provided with multiple usually, and being arranged in relative arc-extinguish chamber 27 of parallel side-by-side.The bottom of arc control device 16 side is provided with the lower exhaust outlet 18 be communicated to outside the pedestal 1 of circuit breaker, and its top is provided with the upper exhaust outlet 19 of the outside being communicated to circuit breaker base 1.Upper exhaust outlet 19 is identical with the effect of lower exhaust outlet 18, all for discharging high temperature and high pressure gas.Concrete, lower exhaust outlet 18 and upper exhaust outlet 19 can be arranged at the top and bottom of arc control device 16 respectively.The top and bottom that it is pointed out that here only refers to the relative position of lower exhaust outlet 18 and upper exhaust outlet 19.
Concrete, when circuit breaker is switched to closure state process by off-state, handle push rod 3 slides under external force, and handle push rod 3 drives snap close 6 and moving contact rack 5 to rotate further, until the moving contact 11 be connected with moving contact rack 5 contacts with fixed contact 13, connect circuit.Because in rotary course, snap close 6 is different from the rotational steps of moving contact rack 5, and then the notch that formed of snap close groove and rack groove reduces gradually with the two rotation, when moving contact 11 rotates to make position, the width of notch is less than the width of handle push rod 3, thus by handle push rod 3 jam in the two groove formed, make circuit breaker remain on closure state.
When circuit breaker tripping, be also namely switched to off-state by closure state, first snap close 6 throws off, and releasing snap close groove and rack groove are to the position-limiting action of handle push rod 3, and snap close 6 and moving contact rack 5 rotate, and moving contact 11 is separated with fixed contact 13.
In circuit breaker breaking course, voltage between moving contact 11 and fixed contact 13 will cause air dielectric to discharge, form electric arc, when arc energy causes the gas temperature in arc control device 16 and pressure to raise, high temperature and high pressure gas is except discharging through lower exhaust outlet 18, also can discharge through upper exhaust outlet 19, thus accelerate the velocity of discharge of high temperature and high pressure gas, circuit breaker cooling-down effect is better.
Some further improvement can be carried out to the operating mechanism of circuit breaker in above-mentioned a kind of embodiment.
For the ease of installing and breaking operation, moving contact rack 5 is connected by bearing pin 8 with snap close 6.When handle push rod 3 rotates with handle, moving contact rack 5 and snap close 6 is driven to rotate around bearing pin 8.Certainly, the two also can adopt other locate modes, and as offered groove on pedestal 1, moving contact rack 5 and snap close 6, along groove rotation etc., only need make the rotation moving contact 11 with the two can contact with fixed contact 13, realize breaker closing.
Further, the side of snap close notch can arrange boss.On the one hand, drive in snap close rotary course at handle push rod, push rod and boss sidewall offset to make it rotate; On the other hand, boss the realization can guaranteeing operating mechanism trip free function is set, and ensure that handle push rod successfully slides into the rack groove of contact supporting in snap close groove, namely ensure that the quick acting of operating mechanism energy, also improves the intensity of snap close groove simultaneously.
During for making breaker closing, snap close groove and rack groove can better by handle push rod 3 jam in groove, to keep circuit breaker normally closed state, the medial surface of snap close groove can arrange projection further.During breaker closing state, the notch that above-mentioned projection and rack groove are formed is less than the width of handle push rod 3, thus handle push rod 3 just in time by jam in groove.Protruding shape and position are determined according to the position of handle push rod 3, and certainly, above-mentioned projection also can be arranged on the medial surface of rack groove, equally can jam handle push rod 3.
In order to optimize technique scheme further, its operating mechanism of the circuit breaker that the utility model provides comprises pull bar 12 further.One end of pull bar 12 is connected with snap close 6, and the bimetal leaf 14 of the other end and circuit breaker offsets.Pull bar 12 can be U-shaped, also can be other shapes that can offset with bimetal leaf such as L-type.To make when the overload occurs, bimetal leaf 14 temperature distortion, drive pull bar 12 action, pull bar 12 is connected with snap close 6 again, drives snap close 6 action, threads off, realize overload protection.
In the utility model one specific embodiment, the cross section of handle push rod 3 is circular, with make handle push rod 3 and the frictional force between snap close 6 and moving contact rack 5 less, and then comparatively laborsaving during driving handle action, handled easily.The cross section of handle push rod 3 also can be set to ellipse or other shapes, is linear contact lay when only it need be made to drive snap close 6 and moving contact rack 5 to rotate.Concrete handle push rod 3 can be Metallic rod, and corresponding snap close 6 and moving contact rack 5 can be working of plastics.Frictional force due to metal and plastic contact surface is less than metal and metal or the frictional force between plastics and plastics, thus further reduces the friction between each parts of breaking course operating mechanism, extends its useful life.
Moving contact 11 of the present utility model is connected with moving contact rack 5, and concrete can offer circular hole in one end of moving contact 11, and moving contact rack 5 is arranged the boss matched with this circular hole, moving contact 11 is fixedly connected with by touch spring 10 with moving contact rack 5.Arranging of touch spring 10 can provide contact pressure for moving contact 11, and after breaker closing, if removed by fixed contact 13, moving contact 11 can continue to rotate forward, realizes the excess of stroke.And the mechanism of the excess of stroke is realized compared to other, connect moving contact 11 by touch spring 10 more simple with the structure of moving contact rack 5, be convenient to manufacture processing and install.Certainly, moving contact 11 also can adopt mode that is hinged or other routines to be connected with moving contact rack 5, can rotate with the rotation of moving contact rack 5.
In order to make circuit breaker tripping process more reliable, laborsaving, the utility model comprises support back-moving spring 7 further.And for the ease of the installation of support back-moving spring 7, moving contact rack 5 is offered further support cavity, for placing rack back-moving spring 7.During breaker closing, support back-moving spring 7 deforms, and produces the power that moving contact rack 5 is rotated to circuit breaker open position direction.Concrete, can offer stand spring groove on moving contact rack 5, and circuit breaker base 1 is provided with pedestal spring boss, one end of support back-moving spring 7 is against in stand spring groove, and the other end is against on pedestal spring boss.When circuit breaker is in closure state, support back-moving spring 7 deforms, and produces and makes moving contact rack 5 disconnect the power of rotating in direction to circuit breaker.Certainly, support back-moving spring 7 also can be installed by other modes of the prior art, and its concrete form the utility model does not limit.
Equally, further, the utility model also comprises snap close back-moving spring 9.For the ease of the installation of snap close back-moving spring 9, snap close 6 offers snap close cavity further, for placing snap close back-moving spring 9, during breaker closing, snap close back-moving spring 9 deforms, and produces the power that snap close 6 is rotated to circuit breaker open position direction.Concrete, can arrange stand spring boss on moving contact rack 5, one end of snap close back-moving spring 9 is against on stand spring boss, and the other end is against on the inwall of snap close cavity.When circuit breaker is in closure state, snap close back-moving spring 9 deforms, and produces and makes snap close 6 disconnect the power of rotating in direction to circuit breaker.Certainly, snap close back-moving spring 9 also can be installed by other modes of the prior art, and its concrete form the utility model does not limit.
The dropout process that support back-moving spring 7 is mainly circuit breaker with the effect of snap close back-moving spring 9 provides a determined power.Certainly, other elastic components or other modes also can be adopted to realize threading off, be not limited to back-moving spring.When breaker closing, due to the notch that snap close groove and rack groove are formed, its width is less than the width of handle push rod 3, and support back-moving spring 7 and snap close back-moving spring 9 act on moving contact rack 5 and snap close 6 make its to circuit breaker disconnects the power of rotating in direction be not enough to make both rotate, therefore snap close groove and rack groove by handle push rod 3 jam in groove, keep the closure state of circuit breaker.When there is overload or overcurrent, snap close 6 is thrown off, releasing snap close groove and rack groove are to the position-limiting action of handle push rod 3, and then under support back-moving spring 7 and snap close back-moving spring 9 act on, drive snap close 6 and moving contact rack 5 to rotate, until moving contact rack 5 and snap close 6 return to the position that circuit breaker disconnects.
Some further improvement can be also carried out to the arc quenching system of circuit breaker in above-mentioned a kind of embodiment.
When arc energy causes the gas temperature in arc control device 16 and pressure to raise, when gases are heated, they expand and pressure rising can cause compressing even to damage to arc control device 16 and to parts such as circuit breaker bases 1.Therefore, the first buffering cavity 20, first buffering cavity 20 can be set further at lower exhaust outlet 18 place and be communicated to pedestal 1 outside.High temperature and high pressure gas in arc control device 16 is flowed out by lower exhaust outlet 18, is expelled to pedestal 1 outside through the first buffering cavity 20.The volume of the first buffering cavity 20 is comparatively large, and concrete can be its wider width, and then provides the flowing space of abundance for expanding gas, avoids gas expansion and causes and even damage the compressing of circuit breaker base 1 or arc quenching system etc.The first buffering concrete shape of cavity 20 and size do not limit here, can arrange according to factors such as the structures of the flow of high temperature and high pressure gas and pedestal 1.
Similar, upper exhaust outlet 19 place also can arrange second buffering cavity 21, the second buffering cavity 21 with larger volume further and be communicated to pedestal 1 outside.After high temperature and high pressure gas in arc control device 16 is flowed out by upper exhaust outlet 19, be expelled to pedestal 1 through the second buffering cavity 21 outside.The effect that second effect and first cushioning cavity 21 cushions cavity 20 is identical, and its concrete shape and size also can be arranged according to factors such as the flow of high temperature and high pressure gas and pedestal 1 structures, are not specifically limited here.It is to be noted, according to concrete airflow condition, can select to arrange separately the first buffering cavity 20 or the second buffering cavity 21, for improving the security reliability of circuit breaker and arc quenching system thereof further, the first buffering cavity 20 and the second buffering cavity 21 also can be set simultaneously.Lower exhaust outlet 18, upper exhaust outlet 19, and the setting of the first buffering cavity 20 and the second buffering cavity 21, can make high temperature and high pressure gas discharge outside the housing of circuit breaker fast, and take full advantage of the effectiveness of arc-chute, improve arc voltage.
In circuit breaker use procedure, moving contact 11 and fixed contact 13 time of releasing produce electric arc, and this electric arc can along to be connected with fixed contact 13 and the stationary contact bar 26 extending to arc control device 16 one end enters arc control device.Usually, the part between fixed contact 13 and arc control device 16 upper end is provided with quiet arc leading angle, and arc-chute 22 and quiet arc leading angle need keep certain distance.Therefore, the length near at least one arc-chute of the stationary contact bar 13 of this circuit breaker in above-mentioned arc control device 16 is set to the length being less than other arc-chutes.Concrete, can for be set near first arc-chute 221, second arc-chute 222 of stationary contact bar 13 of this circuit breaker and the length of the 3rd arc-chute 223 length being less than other arc-chutes, above-mentioned first arc-chute 221, second arc-chute 22 and also namely minimum with the distance of quiet arc leading angle in normal length situation three arc-chutes of the 3rd arc-chute 223.Concrete, its length reduces degree and can arrange according to the position of quiet arc leading angle and arcing conditions etc.Certainly, the length that also can be set to only the first arc-chute 221 is less than other arc-chutes, or the length of only the first arc-chute 221, second arc-chute 222 is less than other arc-chutes etc.
Further, in order to strengthen the magnetic blow-out effect to electric arc, can arrange magnetic conductive iron sheet 23 at the back side of above-mentioned stationary contact bar 26, the back side herein refers to that stationary contact bar 26 deviates from an end face of arc control device 16.Common, stationary contact bar 26 is provided with bending U section, and this U section is protruded to the direction of arc control device 16, in this kind of situation, magnetic conductive iron sheet 23 is arranged at the inner side of U section.
Based on same object, one end that arc striking component 17 deviates from arc control device 16 direction also can arrange magnetic conductive iron sheet 23 further.Certainly, can select to arrange magnetic conductive iron sheet 23 at the back side of the back side of stationary contact bar 26 or arc striking component 17 separately, also all can arrange magnetic conductive iron sheet at the back side of the back side of stationary contact bar 26 and arc striking component 17, concrete can select to arrange according to the actual service condition of circuit breaker.By the setting of magnetic conductive iron sheet 23, further increase magnetic field, thus improve the magnetic blow-out effect to electric arc, accelerate arc extinguishing speed.
Further, for the relative arc separating wall 24 being arranged at arc control device 16 side, above-mentioned arc control device 16 side refers to the side that electric arc produces, the namely side in fixed contact 13 direction, arc separating wall groove 25 can be offered further on this arc separating wall 24, arranging of arc separating wall groove 25 can increase the Jing Paohu road between fixed contact 13 and arc striking component 17 and the creepage distance between arc striking component 17, and then it is breakdown to make it be not easy when switch test.Concrete, above-mentioned arc separating wall groove 25 can arrange two.Certainly, also one or arrange multiple can only be arranged according to the service condition of circuit breaker.
The structure of other each several parts of circuit breaker that the utility model provides please refer to prior art, repeats no more herein.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (11)
1. a circuit breaker, comprises operating mechanism and arc quenching system, and described operating mechanism comprises handle (2) and moving contact (11); Described arc quenching system comprises arc control device (16) and arc striking component (17), and described arc control device (16) comprise the arc-chute (22) that multiple parallel side-by-side is arranged;
It is characterized in that, described operating mechanism comprises further:
One end offers the snap close (6) of snap close groove;
The moving contact rack (5) that one end is fixedly connected with described moving contact (11), the other end of described moving contact rack (5) offers rack groove;
Handle push rod (3), one end of described handle push rod (3) is connected with described handle (2), the other end is placed in described snap close groove and rack groove, described handle push rod (3) can drive described snap close (6) and described moving contact rack (5) to rotate when sliding in snap close groove and rack groove, and the width of rebate that during breaker closing, described snap close groove and described rack groove are formed is less than the width of described handle push rod (3);
The bottom of described arc control device (16) side and top are respectively equipped with the lower exhaust outlet (18) of pedestal (1) outside being communicated to described circuit breaker and are communicated to the outside upper exhaust outlet (19) of described pedestal (1).
2. circuit breaker according to claim 1, it is characterized in that, comprise further be communicated with described lower exhaust outlet (18) first cushion cavity (20), and described first buffering cavity (20) to be communicated to described pedestal (1) outside.
3. circuit breaker according to claim 1, it is characterized in that, comprise further be communicated with described upper exhaust outlet (19) second cushion cavity (21), and described second buffering cavity (21) to be communicated to described pedestal (1) outside.
4. circuit breaker according to claim 1, is characterized in that, the length of at least one arc-chute near stationary contact bar (26) in described arc control device (16) is less than other arc-chutes.
5. the circuit breaker according to any one of claim 1-4, it is characterized in that, comprise the opposite each other arc separating wall (24) being arranged at arc control device (16) side further, described arc separating wall (24) offers arc separating wall groove (25).
6. circuit breaker according to claim 1, is characterized in that, the side of described snap close notch is provided with snap close boss (15).
7. circuit breaker according to claim 1, is characterized in that, comprises the pull bar (12) that one end is connected with described snap close (6) further, and the other end and the bimetal leaf (14) of described pull bar (12) offset.
8. circuit breaker according to claim 1, it is characterized in that, comprise snap close back-moving spring (9) further, and described snap close (6) offers snap close cavity, described snap close back-moving spring (9) is placed in described snap close cavity, during breaker closing, described snap close back-moving spring (9) deforms, and produces the power that described snap close (6) is rotated to circuit breaker open position direction.
9. circuit breaker according to claim 1, it is characterized in that, comprise support back-moving spring (7) further, and described moving contact rack (5) offers support cavity, described support back-moving spring (7) is placed in described support cavity, during breaker closing, described support back-moving spring (7) deforms, and produces the power that described moving contact rack (5) is rotated to circuit breaker open position direction.
10. circuit breaker according to claim 1, is characterized in that, the notch inwall of described snap close groove is provided with projection, with handle push rod described in jam (3).
11. circuit breakers according to claim 1, it is characterized in that, one end of described moving contact (11) offers circular hole, on described moving contact rack, (5) are provided with the boss coordinated with described circular hole, and are fixedly connected with described moving contact (11) by described touch spring (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420677056.6U CN204189738U (en) | 2014-11-13 | 2014-11-13 | Circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420677056.6U CN204189738U (en) | 2014-11-13 | 2014-11-13 | Circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204189738U true CN204189738U (en) | 2015-03-04 |
Family
ID=52621714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420677056.6U Active CN204189738U (en) | 2014-11-13 | 2014-11-13 | Circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204189738U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105845524A (en) * | 2016-05-31 | 2016-08-10 | 乐清市也为电气有限公司 | Arc-extinguishing exhaust system for miniature circuit breaker |
| CN107359087A (en) * | 2017-06-08 | 2017-11-17 | 李文杰 | A kind of high-breaking miniature breaker |
| CN107546081A (en) * | 2016-06-23 | 2018-01-05 | 上海良信电器股份有限公司 | A kind of breaker arc extinguishing space-closed structure |
| CN110970274A (en) * | 2019-12-23 | 2020-04-07 | 国网江苏省电力有限公司滨海县供电分公司 | Small-sized circuit breaker |
| WO2022135043A1 (en) * | 2020-12-25 | 2022-06-30 | 浙江奥来电器有限公司 | Moving contact operating mechanism of circuit breaker |
-
2014
- 2014-11-13 CN CN201420677056.6U patent/CN204189738U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105845524A (en) * | 2016-05-31 | 2016-08-10 | 乐清市也为电气有限公司 | Arc-extinguishing exhaust system for miniature circuit breaker |
| CN107546081A (en) * | 2016-06-23 | 2018-01-05 | 上海良信电器股份有限公司 | A kind of breaker arc extinguishing space-closed structure |
| CN107546081B (en) * | 2016-06-23 | 2020-03-24 | 上海良信电器股份有限公司 | Arc extinguishing space sealing structure of circuit breaker |
| CN107359087A (en) * | 2017-06-08 | 2017-11-17 | 李文杰 | A kind of high-breaking miniature breaker |
| CN110970274A (en) * | 2019-12-23 | 2020-04-07 | 国网江苏省电力有限公司滨海县供电分公司 | Small-sized circuit breaker |
| WO2022135043A1 (en) * | 2020-12-25 | 2022-06-30 | 浙江奥来电器有限公司 | Moving contact operating mechanism of circuit breaker |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204189738U (en) | Circuit breaker | |
| CN104319203B (en) | Circuit breaker operation mechanism | |
| CN202018932U (en) | Double-breakpoint universal breaker | |
| CN100555507C (en) | Miniature circuit breaker | |
| GB2564562A (en) | A high breaking capacity miniature circuit breaker | |
| CN102938354B (en) | Contact and arc extinction system of mold case circuit breaker | |
| CN102376505B (en) | Contactor protecting sheet and molded case circuit breaker contactor with high breaking capacity | |
| CN207529897U (en) | Electric arc separating mechanism and breaker of plastic casing | |
| CN204257458U (en) | Arc extinguishing system of circuit breaker | |
| CN206947279U (en) | Breaker and distribution system | |
| CN112103149B (en) | Hydraulic electromagnetic breaker for 5G | |
| CN208336117U (en) | A kind of breaker of plastic casing | |
| CN108447749B (en) | Arc striking and running structure | |
| CN2909506Y (en) | Frame circuit breaker arc-chutes with gas production material | |
| CN213071051U (en) | High-voltage molded case circuit breaker with gas blocking structure | |
| CN114141593A (en) | Arc extinguishing structure of circuit breaker for power transmission | |
| CN211828540U (en) | Rotary type air-blast arc-extinguishing device | |
| CN108766849A (en) | Breaker double arc extinguishing chambers static contact arc eliminating module | |
| CN212648166U (en) | Hydraulic electromagnetic breaker for 5G | |
| CN203931985U (en) | A kind of arc-control device of circuit breaker | |
| EP3635763B1 (en) | Electric contact system | |
| CN209104098U (en) | Breaker | |
| CN201994187U (en) | Static contacts of automatic transfer switch | |
| CN207303022U (en) | A kind of breaker of plastic casing with high breaking performance | |
| CN207302929U (en) | A kind of breaker of plastic casing with compound arc extinction performance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |