CN207303022U - A kind of breaker of plastic casing with high breaking performance - Google Patents
A kind of breaker of plastic casing with high breaking performance Download PDFInfo
- Publication number
- CN207303022U CN207303022U CN201721062736.7U CN201721062736U CN207303022U CN 207303022 U CN207303022 U CN 207303022U CN 201721062736 U CN201721062736 U CN 201721062736U CN 207303022 U CN207303022 U CN 207303022U
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- China
- Prior art keywords
- arc
- flashboard
- static contact
- breaker
- shielding
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
A kind of breaker of plastic casing with high breaking performance, including shell, static contact, moving contact, tripping mechanism and arc-chutes, after improvement, insulation arc-control device is added, the insulation arc-control device includes shielding flashboard, yoke, rocking arm and torsional spring, the yoke and is fixed on static contact；The front end of the shielding flashboard is corresponding with the gap between dynamic and static contact, shields slide of two sides of flashboard respectively with dynamic and static contact both sides and is slidably connected；The upper end of the rocking arm is hinged with shielding the rear end of flashboard, and lower end is hinged by the fixed pin shaft through torsional spring centre bore with being fixed on the stent of stationary contact cephalic region, is equipped with and the corresponding armature of yoke in the middle part of rocking arm；The both ends of the torsional spring are pressed respectively against on rocking arm and stent.The shielding flashboard 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 breaker of plastic casing with strong short circuit current flow breaking capacity is the utility model is related to, belongs to power switch technology
Field.
Background technology
Moulded case circuit breaker (MCCB) is the industrial important electric elements with civilian low-voltage distribution apparatus, is used as more
The branch switch of low-voltage distribution system protection.Wherein short trouble protection is its most important function, line during due to short trouble
The short circuit current flow on road is very big, breaker can be produced between its dynamic and static contact in disjunction short circuit current flow the very big grade of energy from
Daughter electric arc, only could be rapidly by arc extinction by default arc-extinguishing unit, and breaker could complete disjunction short circuit electricity
The task of stream.
At present, domestic and international MCCB 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 is：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 400V, 50kA, 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 MCCB 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-performance plastic case circuit breaker, to carry
Arc extinguishing ability when high short circuit current flow occurs.
Problem described in the utility model is solved with following technical proposals：
A kind of breaker of plastic casing with high breaking performance, including shell, static contact, moving contact, tripping mechanism and arc extinguishing
Room, after improvement, adds insulation arc-control device, the insulation arc-extinguishing mechanism includes shielding flashboard, yoke, rocking arm and torsional spring, described
Yoke is fixed on static contact；The front end of the shielding flashboard is corresponding with the gap between dynamic and static contact, shields the two of flashboard
Slide of the bar side respectively with dynamic and static contact both sides is slidably connected；The upper end of the rocking arm is hinged with shielding the rear end of flashboard, under
End be hinged by the fixed pin shaft through torsional spring centre bore with being fixed on the stent of stationary contact cephalic region, the middle part of rocking arm equipped with
The corresponding armature of yoke；The both ends of the torsional spring are pressed respectively against on rocking arm and stent.
The above-mentioned breaker of plastic casing with high breaking performance, the rear end of the shielding flashboard is fixed with flashboard axis pin, described
The middle part of flashboard axis pin is located in the slotted hole of rocking arm upper end.
The above-mentioned breaker of plastic casing with high breaking performance, with shielding two corresponding slides in side of flashboard as setting
Groove profile slideway on pedestal, the pedestal are fixed on static contact.
The above-mentioned breaker of plastic casing with high breaking performance, the shielding flashboard be arc panel, the shape of the slide and
The arc-shaped side edges of shielding flashboard match, and are equipped with the both sides of shielding flashboard corresponding with the fit clearance of slide and shielding flashboard
Arc blocking platform.
The above-mentioned breaker of plastic casing with high breaking performance, arc-chutes and magnetic protection buckle releaser are additionally provided with the shell.
The utility model is additionally arranged shielding flashboard, and shielding flashboard can move rapidly in the moment of breaker disjunction short circuit current flow
Make, between insertion moving contact and static contact, make arc extinction or the reduction just produced between dynamic and static contact, thus contract
The short amplification time of arc energy, reduces gathering for arc energy, realizes the short arcing of breaker or without arcing.This reality
Two-stage arc extinguishing is taken with new, the electric arc after initially shielding flashboard auxiliary extinction of arc, which can be introduced into arc-chutes, to be continued subsequently
Arc extinguishing operates, so as to substantially increase the arc extinguishing ability of breaker, also substantially increases the ability of breaker disjunction short circuit current flow.
Brief description of the drawings
Fig. 1 is the "on" position schematic diagram of the utility model；
Fig. 2 is the contact reprimand open state schematic diagram of the utility model；
Fig. 3 is the gate-dividing state schematic diagram of the utility model；
Fig. 4 is the structure diagram of insulation arc-control device；
Fig. 5 is C-C sectional views；
Fig. 6 is the structure diagram of static contact；
Fig. 7 is the top view of Fig. 6；
Fig. 8 is the structure diagram of pedestal；
Fig. 9 is the left view of Fig. 8；
Figure 10 is the structure diagram of stent；
Figure 11 is the top view of Figure 10；
Figure 12 is the structure diagram of rocking arm and armature；
Figure 13 is the left view of Figure 12；
Figure 14 is the structure diagram for shielding flashboard；
Figure 15 is the top view of Figure 14.
Each list of reference numerals is in figure：1st, static contact；2nd, moving contact；3rd, pedestal；3-1, slide；4th, flashboard is shielded；4-1, gear
Arc platform；4-2, axis hole；5th, rocking arm, 5-1, armature；5-2, slotted hole；6th, yoke；7th, torsional spring；8th, screw；9th, stent；9-1, screw
Hole；9-2, pin shaft hole；10th, magnetic protection buckle releaser；10-1, tripping mechanism；11st, arc-chutes；12nd, shell；13rd, handle；A, move and touch
Head shaft；B, flashboard axis pin；C, fixed pin shaft.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings.
The utility model is that an insulation arc-control device driven by electromagnetic force is installed at the static contact position of original MCCB,
In the moment that short trouble occurs, the not yet full opening of electric arc lag phase (energy not yet amplifies) of the dynamic and static contact of breaker,
While dynamic and static contact is opened by electrodynamic repulsion force reprimand, between shielding flashboard is rapidly inserted into dynamic and static contact, rapid arc extinguishing is played
Effect.
Referring to Fig. 1~Figure 15, the utility model mainly includes static contact 1, the moving contact being arranged in case for circuit breaker 12
2nd, pedestal 3, shielding flashboard 4, Rocker arm 5, armature 5-1, yoke 6, torsional spring 7, stent 9, magnetic protection buckle releaser 10, tripping mechanism 10-
1st, arc-chutes 11 and handle 13.
Rocker arm 5 is that an assembly, Rocker arm 5 and torsional spring 7 are installed on stent 9 by fixed pin shaft C with armature 5-1, stent 9
With pedestal 3 one screw 8 is reinstated to be fixed on static contact 1, Rocker arm 5 can swing, usually Rocker arm 5 and armature 5-1 by
The position in Fig. 1 is in the effect of torsional spring 7, insulation arc-control device is in an open state.When there is short-circuit current in circuit,
Due to static contact 1, on the contrary, therefore producing electrodynamic repulsion force, by static contact 1, quickly reprimand is opened with moving contact 2 with 2 current direction of moving contact,
Simultaneously because yoke 6 produces electromagnetic attraction under the magnetic fields that high current produces to armature 5-1, armature 5-1 overcomes torsional spring 7 to make
Swung with the generation of drive Rocker arm 5 is quick counterclockwise, shielded so as to drive in the groove profile slide 3-1 that flashboard 4 is set on pedestal 3 soon
Speed is rapidly inserted into (Fig. 2 positions) between dynamic and static contact to left movement while dynamic and static contact reprimand is opened, and plays fast arc extinction
Effect, at the same time, magnetic protection buckle releaser 10 promote its switch trip mechanism 10-1 action, the moving contact 2 of breaker with it is quiet
Contact 1 is opened completely, completes the breaking course of MCCB.Since short circuit current flow is cut off, strong-electromagnetic field disappears, insulation shielding flashboard
4 torsional spring 7 effect under homing (Fig. 3 positions).
The both sides of shielding flashboard 4 are equipped with arc blocking platform 4-1, and the cross section for making shielding flashboard 4 is in horse-saddle, arc blocking platform 4-1
Effect be to form electric arc in the fit clearance for prevent shielding flashboard 4 and groove profile slide 3-1.The height of arc blocking platform 4-1 is 3-5 millis
Rice.
Rotating hinge chain type repulsion structure is used between static contact 1 and moving contact 2.The metal strip of static contact 1 includes at least one
Section flat segments parallel with moving contact, the current direction in 1 flat segments of static contact and moving contact 2 is on the contrary, 1 flat segments of static contact
Length produce when being more than or equal to short circuit current flow in moving contact and static contact and make the repulsion that dynamic and static contact repels each other out required for
Length.When an error occurs, when the opposite short circuit current flow in direction flows through static contact flat segments and moving contact, in 1 He of static contact
Electrodynamic repulsion force is produced between moving contact 2 so that moving contact 2 is denounceed out rotationally clockwise using moving contact shaft A as axis.
Flashboard 4 is shielded using high intensity, heat safe engineering plastic materials.It can ensure effective disjunction as defined in product standard
The number (most 3 times) of short circuit current flow.
The dynamic and static contact of the utility model can also be the repulsion structure without parallel inverse current, in the short of MCCB
In the breaking course of road, when magnetic protects buckle releaser and tripping mechanism to act, shielding flashboard can also be rapidly inserted into dynamic and static contact it
Between, achieve the purpose that quick insulation shielding arc extinguishing.
Arc-chutes 11, which are used to cool down, extinguishes remaining electric arc；Handle 13 is installed on 12 upper end of shell, is grasped for normal on/off switch
Make.
The arc-control device that insulate forms two-stage arc-control device with arc-chutes 11, and insulation arc-control device is not yet complete in dynamic and static contact
Arc extinguishing during full opening, and arc-chutes 11 are then to have good extinguishing remnants arcings after dynamic and static contact is opened completely.
Since MCCB 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 (5)
1. a kind of breaker of plastic casing with high breaking performance, including shell (12), static contact, moving contact, tripping mechanism and go out
Arc chamber, it is characterized in that, insulation arc-control device is added, the insulation arc-control device includes shielding flashboard (4), yoke (6), rocking arm
(5) it is fixed on torsional spring (7), the yoke (6) on static contact (1)；Front end and the dynamic and static contact of the shielding flashboard (4) it
Between gap it is corresponding, slide (3-1) of two sides respectively with dynamic and static contact both sides of shielding flashboard (4) is slidably connected；Institute
The upper end and the rear end of shielding flashboard (4) for stating rocking arm (5) are hinged, and lower end passes through the fixed pin shaft (C) through torsional spring (7) centre bore
It is hinged with the stent (9) that is fixed on static contact (1) sidepiece, it is equipped with the middle part of rocking arm (5) and yoke (6) corresponding armature
(5-1)；The both ends of the torsional spring (7) are pressed respectively against on rocking arm (5) and stent (9).
2. the breaker of plastic casing according to claim 1 with high breaking performance, it is characterized in that, the shielding flashboard (4)
Rear end be fixed with flashboard axis pin (B), the middle part of the flashboard axis pin (B) is located in the slotted hole (5-2) of rocking arm (5) upper end.
3. the breaker of plastic casing according to claim 1 or 2 with high breaking performance, it is characterized in that, with shielding flashboard (4)
Two corresponding slides in side (3-1) be to be arranged on groove profile slideway on pedestal (3), the pedestal (3) is fixed on stationary contact
On head (1).
4. the breaker of plastic casing according to claim 3 with high breaking performance, it is characterized in that, the shielding flashboard (4)
For arc panel, the shape and the arc-shaped side edges of shielding flashboard (4) of the slide (3-1) match, in the both sides of shielding flashboard (4)
Equipped with the corresponding arc blocking platform (4-1) of fit clearance with slide (3-1) and shielding flashboard (4).
5. the breaker of plastic casing according to claim 4 with high breaking performance, it is characterized in that, in the shell (12) also
Equipped with arc-chutes (11) and magnetic protection buckle releaser (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721062736.7U CN207303022U (en) | 2017-08-23 | 2017-08-23 | A kind of breaker of plastic casing with high breaking performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721062736.7U CN207303022U (en) | 2017-08-23 | 2017-08-23 | A kind of breaker of plastic casing with high breaking performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207303022U true CN207303022U (en) | 2018-05-01 |
Family
ID=62438660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721062736.7U Expired - Fee Related CN207303022U (en) | 2017-08-23 | 2017-08-23 | A kind of breaker of plastic casing with high breaking performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207303022U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109801818A (en) * | 2019-03-22 | 2019-05-24 | 乐清市速通电气有限公司 | Contact system with arc |
-
2017
- 2017-08-23 CN CN201721062736.7U patent/CN207303022U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109801818A (en) * | 2019-03-22 | 2019-05-24 | 乐清市速通电气有限公司 | Contact system with arc |
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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: 20180501 Termination date: 20200823 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |