CN207367828U - A kind of high-breaking miniature breaker - Google Patents
A kind of high-breaking miniature breaker Download PDFInfo
- Publication number
- CN207367828U CN207367828U CN201721057240.0U CN201721057240U CN207367828U CN 207367828 U CN207367828 U CN 207367828U CN 201721057240 U CN201721057240 U CN 201721057240U CN 207367828 U CN207367828 U CN 207367828U
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- China
- Prior art keywords
- moving contact
- arc
- contact
- actively fork
- shielding plate
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Abstract
A kind of high-breaking miniature breaker, composition includes static contact, the moving contact being connected with tripping mechanism and insulation arc-extinguishing mechanism, the insulation arc-extinguishing mechanism includes insulation shielding plate, armature, U-shaped yoke, actively fork and driven lever, and the gap that the insulation shielding plate is located at below the moving contact of breaker and between dynamic and static contact is corresponding；The actively fork and driven lever are parallel to each other and form four-bar linkage structure with moving contact and insulation shielding plate；The armature is located above moving contact and is fixed on the turning handle of actively fork upper end；The U-shaped yoke is sleeved on moving contact and corresponding with armature from below；Torsional spring is equipped between actively fork and moving contact.The insulation shielding plate of the utility model can be rapidly inserted between dynamic and static contact in breaker disjunction short circuit current flow, make arc extinction, the amplification time of arc energy is thus shortened, the short arcing of breaker is realized or without arcing, so as to substantially increase the ability of breaker disjunction short circuit current flow.
Description
Technical field
A kind of miniature circuit breaker with strong short circuit current flow breaking capacity is the utility model is related to, belongs to emergency protective device
Technical field.
Background technology
Miniature circuit breaker (MCB) is the industrial important electric elements with civilian low-voltage distribution apparatus, more applied to low pressure
The end of distribution system, protects the overload and short trouble of distribution line.Wherein short trouble protection is that its is most important
Function, the short circuit current flow of circuit is very big during due to short trouble, breaker in disjunction short circuit current flow its dynamic and static contact it
Between can produce the very big plasma arc of energy, could only be broken by default arc-extinguishing unit rapidly by arc extinction
Road device could complete the task of disjunction short circuit current flow.
At present, domestic and international MCB using arc-chutes technology to disjunction short circuit current flow when caused high temperature and pressure electric arc into
Row cooling and extinguishing, the arc quenching principle of this technology are：During disjunction short circuit current flow, treat to produce electric arc between dynamic and static contact and draw
After growing to the corresponding amplification of certain length, energy, arc-chutes are entered using magnetic field electro-dynamic force or other means driving high energy arc, are made
Extinguish under the cooling effect of its metal grid in arc-chutes.The arc quenching effect of this method is subject to such as arc-chutes material, touches
Head cut-offs the influence of the factors such as speed, clearance between open contacts, contact material, especially for the breaker of single-break structure, its disjunction
The ability of short circuit current flow is poor, be usually no more than exchange 230V, 6kA, and direct-current short circuit electric current due to no zero passage process more
It is not easy disjunction.
With the raising that the construction and development and people of power grid require electric network reliability, a kind of new go out objectively is needed
Arc scheme, to greatly improve the ability of MCB disjunction short circuit current flows.
Utility model content
The purpose of this utility model is that the drawback for the prior art, there is provided a kind of high-breaking miniature breaker, to carry
The breaking capacity of high short circuit current flow.
Problem described in the utility model is realized with following technical proposals：
A kind of high-breaking miniature breaker, composition include housing, static contact, moving contact, tripping mechanism and arc-chutes, change
Into rear, add insulation arc-extinguishing mechanism, the insulation arc-extinguishing mechanism include insulation shielding plate, armature, U-shaped yoke, actively fork and
Driven lever, the gap that the insulation shielding plate is located at below the moving contact of breaker and between dynamic and static contact are corresponding；Institute
State actively fork and driven lever is parallel to each other and forms four-bar linkage structure with moving contact and insulation shielding plate；The armature is located at
Above moving contact and it is fixed on the turning handle of actively fork upper end；The U-shaped yoke is sleeved on from below on moving contact and and armature
It is corresponding；Torsional spring is equipped between actively fork and moving contact.
Above-mentioned high-breaking miniature breaker, the both sides of the insulation shielding plate are folded upward at, and bending part is touched away from dynamic
Head is rotatablely connected with one end of static contact contact surface and actively fork, one end of close moving contact and static contact contact surface with it is driven
Swing rod is rotatablely connected, and the turning handle of actively fork upper end is located remotely from the side of driven lever.
Above-mentioned high-breaking miniature breaker, the actively fork and driven lever are respectively provided with two, they are symmetrically mounted on
The both sides of insulation shielding plate and moving contact, the turning handle of the both ends of armature respectively with two actively fork upper ends are connected.
Above-mentioned high-breaking miniature breaker, the actively fork and turning handle use integral structure.
Above-mentioned high-breaking miniature breaker, is additionally provided with arc-chutes in the Shell of circuit breaker.
The utility model is additionally arranged insulation shielding plate can be in breaker disjunction as auxiliary extinction of arc mechanism, auxiliary extinction of arc mechanism
The moment of short circuit current flow acts rapidly, is inserted between moving contact and static contact, and the electric arc for making just to have produced between dynamic and static contact is put out
Go out or reduce, thus shorten the amplification time of arc energy, reduce gathering for arc energy, realize breaker
Short arcing or without arcing.The utility model takes two-stage arc extinguishing, and the electric arc after initial auxiliary extinction of arc can be introduced into arc extinguishing
Follow-up arc extinguishing operation is continued in room, so as to substantially increase the arc extinguishing ability of breaker, it is short also to substantially increase breaker disjunction
The ability of road electric current.
Brief description of the drawings
Fig. 1 is the structure diagram of the utility model；
Fig. 2 is the structure diagram of insulation arc-extinguishing mechanism；
Fig. 3 is the C direction views of Fig. 2；
Fig. 4 is that contact reprimand is opened and masked state；
Fig. 5 is circuit breaker tripping open mode；
Fig. 6 is the structure diagram of tripping mechanism；
Fig. 7 is moving contact structure schematic diagram；
The top view of Fig. 8 Fig. 7；
Fig. 9 is the connection diagram of armature and actively fork；
Figure 10 is the left view of Fig. 9；
The structure diagram of Figure 11 insulation shielding plates；
Figure 12 is the left view of Figure 11；
Figure 13 is the structure diagram of U-shaped yoke；
Figure 14 is the left view of Figure 13.
Each list of reference numerals is in figure：1st, static contact；2nd, moving contact；3rd, driven lever；4th, insulation shielding plate；5th, torsional spring；6、
Armature；7th, U-shaped yoke；8th, torque spring；9th, tripping mechanism；9-1, lock；9-2, moving contact rocking arm；9-3, tripping；9-4, company
Bar；9-5, tension spring；10th, magnetic dropout push rod；11st, upper articulated shaft；12nd, lower articulated shaft；13rd, actively fork；14th, turning handle；15th, go out
Arc chamber；16th, handle；A, moving contact shaft；B, axis pin is latched；C, tripping axis pin.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings.
The utility model is mounted with an insulation arc-extinguishing mechanism driven by electromagnetic force on moving contact of breaker, in short circuit
The moment that failure occurs, the not yet full opening of electric arc lag phase (energy not yet amplifies) of its dynamic and static contact, dynamic and static contact
While being opened by electrodynamic repulsion force reprimand, which is rapidly inserted into dynamic and static between lifting one's head.Electric arc is extinguished using insulation shielding mode, from
And the ability of MCB disjunction short circuit current flows greatly improved.
It is static contact 1 that the utility model mainly includes being installed in case for circuit breaker, moving contact 2, de- referring to Fig. 1-Fig. 6
Buckle mechanism 9, magnetic dropout push rod 10, arc-chutes 15 and insulation arc-extinguishing mechanism, wherein, using rotation between static contact 1 and moving contact 2
Hinge type repulsion structure, moving contact 2 are installed on by moving contact shaft A on the moving contact rocking arm 9-2 of tripping mechanism 9, and magnetic is threaded off
Push rod 10 is arranged on the lower section of tripping mechanism 9 and corresponding with the lock 9-1 of tripping mechanism 9；Use is additionally provided with tripping mechanism 9
In the torque spring 8 being pressed on moving contact 2 on static contact 1.Insulate arc-extinguishing mechanism include driven lever 3, actively fork 13, absolutely
Edge barricade 4, torsional spring 5, armature 6 and U-shaped yoke 7.Wherein, insulation shielding plate 4, actively fork 13, driven lever 3 and open circuit
The moving contact 2 of device forms a quadric chain, and driven lever 3 is articulated with moving contact by upper articulated shaft 11 and lower articulated shaft 12
Between 2 and insulation shielding plate 4, actively fork 13 is equally also articulated between moving contact 2 and insulation arc extinction part 4, and armature 6 is by turning
Handle 14 is connected with the upper end of actively fork 13, and U-shaped yoke 7 is on moving contact 2 and corresponding with armature 6, and torsional spring 5 is installed
Between moving contact 2 and actively fork 13 (or turning handle 14), usually since torsional spring 5 is to the work of actively fork 13 (or turning handle 14)
With insulation arc-extinguishing mechanism is in open mode (position in Fig. 2).When short circuit current flow occurs in circuit, since static contact 1 is with moving
2 current direction of contact opens static contact 1 and the reprimand of moving contact 2 on the contrary, therefore producing electrodynamic repulsion force, simultaneously because U-shaped yoke 7 is short
Electromagnetic attraction is produced after the current magnetization of road to armature 6, it is suitable that armature 6, actively fork 13 and turning handle 14 overcome the elastic force of torsional spring 5 to produce
Hour hands rotate, so as to drive the insulation arc-control device of four-bar linkage structure to act, its insulation shielding plate 4 is opened in dynamic and static contact reprimand
It is rapidly inserted at the same time between moving contact 2 and static contact 1, achievees the purpose that rapid insulation shielding arc extinguishing.At the same time, the magnetic of MCB
Dropout push rod 10 promotes its tripping mechanism 9 (ripe design) to be rotated clockwise around lock axis pin B and realizes disconnection of threading off, 16, handle
In switch open position, the breaking course of MCB is completed.Arc-chutes 15 design to be former, do not influence the arc-extinguishing mechanism that insulate.Short circuit current flow
After disappearance, insulate arc-control device homing.
Insulation shielding plate 4 is using high intensity, heat safe engineering plastic materials.It can ensure effectively to divide as defined in product standard
The number (most 3 times) of disconnected short circuit current flow.
Insulation shielding plate 4 forms two-stage arc-control device as auxiliary extinction of arc mechanism and arc-chutes 15, and auxiliary extinction of arc mechanism exists
Arc extinguishing when dynamic and static contact is not yet opened completely, and arc-chutes 15 are then to have the good extinguishing residual after dynamic and static contact is opened completely
Remaining arcing.
Tripping mechanism 9 includes lock 9-1, moving contact rocking arm 9-2, tripping 9-3, connecting rod 9-4 and tension spring 9-5, lock 9-1 and
Moving contact rocking arm 9-2 is arranged on the stent of Shell of circuit breaker by latching axis pin B, and magnetic dropout push rod 10 is arranged on lock 9-
On the Shell of circuit breaker of 1 lower section；Tripping 9-3 is hinged on moving contact rocking arm 9-2 close to one end of handle by tripping axis pin C, jumps
It is flexibly connected between button 9-3 and handle 16 by connecting rod 9-4；The other end of moving contact rocking arm 9-2 is hinged by moving contact shaft A
The tail end of moving contact 2；One end of tension spring 9-5 is connected on moving contact rocking arm 9-2 between lock axis pin B and tripping axis pin C
Position, the other end is fixed in the support shaft of Shell of circuit breaker distal end.
Torque spring 8 is additionally provided with tripping mechanism 9；Torque spring is installed on moving contact 2 by moving contact shaft A and moves
On contact rocking arm 9-2, under "on" position, torque spring 8 can make the head of moving contact 2 be in close contact and keep with static contact 1
Certain pressure.
The metal strip of static contact 1 includes at least one section of flat segments parallel with moving contact 2, the electric current in flat segments with it is dynamic
Current direction in contact 2 is on the contrary, the length of flat segments produces when being more than or equal to short circuit current flow in moving contact and static contact
Make the required length of the repulsion that dynamic and static contact repels each other out.
The operation principle of tripping mechanism 9 is as follows：
Before short-circuit current occurs in distribution system and short circuit current flow not yet reaches peak value, due to moving contact 2 and quiet
Current direction in 1 flat segments of contact is opposite so that electrodynamic repulsion force is produced between moving contact and static contact, moving contact 2 is electronic
Power effect under overcome torque spring 8 twisting force be first about moving contact shaft A rotate clockwise with static contact 1 reprimand open, together
When insulate arc-extinguishing mechanism action, realize and effective limitation of the initial stage to short circuit current flow occur in short trouble；Then, magnetic standby is protected
Protect the magnetic dropout push rod 10 in trip coil and drive the lock 9-1 in tripping mechanism 9 rapidly under the influence of a magnetic field around lock
Pin buckle axis B is rotated clockwise, and the lap-joint for latching 9-1 and tripping 9-3 at this time in D points (referring to Fig. 6) disengages, and tripping 9-3 loses
After support around tripping axis pin C rotationally clockwise, moving contact rocking arm 9-2 loses the support of connecting rod 9-4 at the same time, in tension spring 9-5
Under the action of rotated clockwise around lock axis pin B, the overall clockwise motion of tripping mechanism 9, switches off.I.e. in short circuit current flow
Before reaching maximum, denounceed out in advance by the repulsion between moving contact and static contact, short circuit breaking capacity is improved to reach
Purpose.
Since MCB uses above technical scheme, following technological progress can be obtained：
1 can greatly improve the ability of product disjunction short circuit current flow；
2. it can achieve the purpose that AC and DC is general；
3. in disjunction failed shorted electric current, the further expansion of arc energy can be limited, so that the short of product can be realized
Arcing or without arcing.
Claims (4)
1. a kind of high-breaking miniature breaker, composition includes housing, static contact, moving contact, tripping mechanism and arc-chutes (15),
It is characterized in that adding insulation arc-extinguishing mechanism, the insulation arc-extinguishing mechanism includes insulation shielding plate (4), armature (6), U-shaped yoke
(7), actively fork (13) and driven lever (3), the insulation shielding plate (4) be located at below the moving contact (2) of breaker and with
Gap between dynamic and static contact is corresponding；The actively fork (13) and driven lever (3) be parallel to each other and with moving contact (2)
Four-bar linkage structure is formed with insulation shielding plate (4)；The armature (6) is located above moving contact (2) and is fixed on actively fork
(13) on the turning handle (14) of upper end；The U-shaped yoke (7) is sleeved on moving contact (2) and corresponding with armature (6) from below；
Torsional spring (5) is equipped between actively fork (13) and moving contact (2).
2. high-breaking miniature breaker according to claim 1, it is characterized in that, the two of the insulation shielding plate (4) are lateral
Upper bending, the remote moving contact (2) of bending part are rotatablely connected with one end of static contact (1) contact surface and actively fork (13),
It is rotatablely connected close to moving contact (2) and one end of static contact (1) contact surface with driven lever (3), actively fork (13) upper end
Turning handle (14) is located remotely from the side of driven lever (3).
3. high-breaking miniature breaker according to claim 1 or 2, it is characterized in that, the actively fork (13) and driven
Swing rod (3) is respectively provided with two, they are symmetrically mounted on the both sides of insulation shielding plate (4) and moving contact (2), the both ends of armature (6)
The turning handle (14) with two actively fork (13) upper ends is connected respectively.
4. high-breaking miniature breaker according to claim 3, it is characterized in that, the actively fork (13) and turning handle (14)
Using integral structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721057240.0U CN207367828U (en) | 2017-08-23 | 2017-08-23 | A kind of high-breaking miniature breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721057240.0U CN207367828U (en) | 2017-08-23 | 2017-08-23 | A kind of high-breaking miniature breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207367828U true CN207367828U (en) | 2018-05-15 |
Family
ID=62423302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721057240.0U Expired - Fee Related CN207367828U (en) | 2017-08-23 | 2017-08-23 | A kind of high-breaking miniature breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207367828U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107342178A (en) * | 2017-08-23 | 2017-11-10 | 河北宝凯电气股份有限公司 | A kind of high-breaking miniature breaker |
-
2017
- 2017-08-23 CN CN201721057240.0U patent/CN207367828U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107342178A (en) * | 2017-08-23 | 2017-11-10 | 河北宝凯电气股份有限公司 | A kind of high-breaking miniature breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180515 Termination date: 20200823 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |