CN207303019U - A kind of protected type contact arc extinguishing device - Google Patents
A kind of protected type contact arc extinguishing device Download PDFInfo
- Publication number
- CN207303019U CN207303019U CN201721057237.9U CN201721057237U CN207303019U CN 207303019 U CN207303019 U CN 207303019U CN 201721057237 U CN201721057237 U CN 201721057237U CN 207303019 U CN207303019 U CN 207303019U
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- China
- Prior art keywords
- contact
- moving contact
- actively fork
- shielding plate
- insulation shielding
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Abstract
A kind of protected type contact arc extinguishing device, composition include 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.In the gap that the insulation shielding plate of the utility model can be rapidly inserted between moving contact and static contact in breaker disjunction short circuit current flow, make the arc extinction between dynamic and static contact, thus shorten the amplification time of arc energy, 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
When the utility model is related to one kind can effectively prevent breaker disjunction short circuit current flow, produced between its dynamic and static contact
The device of larger electric arc, 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.At present, caused high temperature and pressure when domestic and international MCB uses arc-chutes technology to disjunction short circuit current flow
Electric arc is cooled down and extinguished, and the arc quenching principle of this technology is：During disjunction short circuit current flow, treat to produce electricity between dynamic and static contact
Arc is simultaneously elongated to after certain length, energy accordingly amplification, and high energy arc is driven into death of monks or nuns using magnetic field electro-dynamic force or other means
Arc chamber, makes to 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, contact cut-off the influence of the factors such as speed, clearance between open contacts, contact material, especially for the breaker of single-break structure,
The ability of its disjunction short circuit current flow is poor, is usually no more than exchange 230V, 6kA, and direct-current short circuit electric current is due to no zero passage
Process is less susceptible to 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, and realizes the generalization of AC and DC arc-control device.
Utility model content
The purpose of this utility model is that the drawback for the prior art, there is provided a kind of protected type contact arc extinguishing device, with
Improve the ability of breaker disjunction short circuit current flow.
Problem described in the utility model is solved with following technical proposals：
A kind of protected type contact arc extinguishing device, composition include insulation shielding plate, armature, U-shaped yoke, actively fork and from
Driven fork, the gap that the insulation shielding plate is located at below the moving contact of breaker and between dynamic and static contact are corresponding；It is described
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 positioned at dynamic
Above contact and it is fixed on the turning handle of actively fork upper end；The U-shaped yoke be sleeved on from below on moving contact and with armature phase
It is corresponding；Torsional spring is equipped between actively fork and moving contact.
Above-mentioned protected type contact arc extinguishing device, the both sides of the insulation shielding plate are folded upward at, and the remote of bending part moves
One end of contact and static contact contact surface is rotatablely connected with actively fork, close to one end of moving contact and static contact contact surface with from
Driven fork is rotatablely connected, and the turning handle of actively fork upper end is located remotely from the side of driven lever.
Above-mentioned protected type contact arc extinguishing device, the actively fork and driven lever are respectively provided with two, they are symmetrically installed
In 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 is connected.
Above-mentioned protected type contact arc extinguishing device, the actively fork and turning handle use integral structure.
The insulation shielding plate of the utility model can be rapidly inserted into moving contact and static contact in breaker disjunction short circuit current flow
Between gap in, make the arc extinction between dynamic and static contact, thus shorten the amplification time of arc energy, realize
The short arcing of breaker or without arcing, so as to substantially increase the ability of breaker disjunction short circuit current flow.
Brief description of the drawings
Fig. 1 is the structure diagram of the utility model；
Fig. 2 is the C direction views of Fig. 1；
Fig. 3 is that contact reprimand is opened and masked state；
Fig. 4 is circuit breaker tripping open mode；
Fig. 5 is moving contact structure schematic diagram；
The top view of Fig. 6 Fig. 5；
Fig. 7 is the connection diagram of armature and actively fork；
Fig. 8 is the left view of Fig. 7；
The structure diagram of Fig. 9 insulation shielding plates；
Figure 10 is the left view of Fig. 9；
Figure 11 is the structure diagram of U-shaped yoke；
Figure 12 is the left view of Figure 11.
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；10th, magnetic protection buckle releaser；11st, upper articulated shaft；12nd, lower articulated shaft；
13rd, actively fork；14th, turning handle；A, moving contact shaft；B, axis pin.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings.
The utility model is mounted in an insulation arc-extinguishing mechanism driven by electromagnetic force on moving contact of breaker, works as line
When there is short circuit current flow in road, while the dynamic and static contact of breaker is opened by electrodynamic repulsion force reprimand (or be short-circuited instantaneous release and move
While opening), the insulation arc-control device of four-bar linkage structure acts under electromagnetic force driving, its insulation shielding plate is rapidly inserted into
It is dynamic and static lift one's head between, play the role of rapid arc extinguishing.
Referring to Fig. 1-Figure 12, the utility model mainly includes driven lever 3, the actively fork being arranged in Shell of circuit breaker
13rd, insulation shielding plate 4, torsional spring 5, armature 6 and U-shaped yoke 7.Wherein, insulation shielding plate 4, actively fork 13, driven lever 3 with
The moving contact 2 of breaker forms a quadric chain, and driven lever 3 is articulated with dynamic by upper articulated shaft 11 and lower articulated shaft 12
Between contact 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 logical
The upper end that turning handle 14 is crossed with actively fork 13 is connected, U-shaped yoke 7 be installed on moving contact 2 on, torsional spring 5 be installed on moving contact 2 with
Between actively fork 13 (or turning handle 14), usually due to effect of the torsional spring 5 to actively fork 13 (or turning handle 14), insulate arc extinguishing machine
Structure is in open mode (position in Fig. 1).When short circuit current flow occurs in circuit, due to static contact 1 and 2 current direction of moving contact
Static contact 1 and the reprimand of moving contact 2 are opened on the contrary, therefore producing electrodynamic repulsion force, simultaneously because after U-shaped yoke 7 is short-circuited current magnetization
Electromagnetic attraction is produced to armature 6, armature 6, actively fork 13 and turning handle 14 overcome the elastic force generation of torsional spring 5 to rotate clockwise, from
And driving the insulation arc-control device of four-bar linkage structure to act, its insulation shielding plate 4 is rapidly inserted into while dynamic and static contact reprimand is opened
Between moving contact 2 and static contact 1, achieve the purpose that rapid insulation shielding arc extinguishing.At the same time, the magnetic protection buckle releaser 10 of MCB
Promote its tripping mechanism 9 (maturation design) to rotate clockwise realization dropout around axis pin B to disconnect, complete the breaking course of MCB.Short circuit
After current vanishes, insulate arc-control device homing.
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 electric current and moving contact in flat segments is on the contrary, the length of flat segments
More than or equal to the required length of repulsion that generation makes dynamic and static contact repel each other out during short circuit current flow in moving contact and static contact
Degree.When short trouble occurs, the opposite short circuit current flow in direction flows through static contact flat segments and moving contact, at this time, in static contact
Repulsion is produced between moving contact so that moving contact 2 is denounceed out rotationally clockwise around contact axis pin A.It is quiet in the utility model
The geometrical length of contact flat segments is lengthened on the basis of common static contact so that moving contact 2 it is parallel with static contact 1 away from
From growth, under the opposite short circuit current flow effect in direction, larger electrodynamic repulsion force can be produced.
The moving contact 2 of breaker uses rotating hinge chain type repulsion structure with static contact 1, and keeping dynamic by torque spring 8 touches
Contact pressure when head, static contact contact；When there is especially big short circuit current flow, moved by the electrodynamic repulsion force produced in tripping mechanism 9
Dynamic and static contact reprimand is opened (its short circuit current flow reaches before maximum) before completing.
Insulation shielding plate 4 in the utility model goes out as auxiliary extinction of arc mechanism when dynamic and static contact is not yet opened completely
Arc, and common arc-chutes are then to have good extinguishing remnants arcings after dynamic and static contact is opened completely.
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.
Claims (4)
1. a kind of protected type contact arc extinguishing device, it is characterized in that, composition 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. protected type contact arc extinguishing device according to claim 1, it is characterized in that, the both sides of the insulation shielding plate (4)
It is folded upward at, the remote moving contact (2) of bending part is rotated with one end of static contact (1) contact surface with actively fork (13) to be connected
Connect, be 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) be located remotely from the sides of driven lever (3).
3. protected type contact arc extinguishing device according to claim 1 or 2, it is characterized in that, the actively fork (13) and from
Driven fork (3) is respectively provided with two, they are symmetrically mounted on the both sides of insulation shielding plate (4) and moving contact (2), and the two of armature (6)
The turning handle (14) respectively with two actively fork (13) upper ends is held to be connected.
4. protected type contact arc extinguishing device according to claim 3, it is characterized in that, the actively fork (13) and turning handle
(14) integral structure is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721057237.9U CN207303019U (en) | 2017-08-23 | 2017-08-23 | A kind of protected type contact arc extinguishing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721057237.9U CN207303019U (en) | 2017-08-23 | 2017-08-23 | A kind of protected type contact arc extinguishing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207303019U true CN207303019U (en) | 2018-05-01 |
Family
ID=62445252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721057237.9U Expired - Fee Related CN207303019U (en) | 2017-08-23 | 2017-08-23 | A kind of protected type contact arc extinguishing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207303019U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107393778A (en) * | 2017-08-23 | 2017-11-24 | 河北宝凯电气股份有限公司 | A kind of protected type Arc Distinguishing Device for Circuit Breakers |
| CN114242536A (en) * | 2022-01-12 | 2022-03-25 | 山东泰开高压开关有限公司 | Low-frequency circuit breaker transmission mechanism |
-
2017
- 2017-08-23 CN CN201721057237.9U patent/CN207303019U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107393778A (en) * | 2017-08-23 | 2017-11-24 | 河北宝凯电气股份有限公司 | A kind of protected type Arc Distinguishing Device for Circuit Breakers |
| CN107393778B (en) * | 2017-08-23 | 2020-01-14 | 河北宝凯电气股份有限公司 | Arc extinguishing device of shielded circuit breaker |
| CN114242536A (en) * | 2022-01-12 | 2022-03-25 | 山东泰开高压开关有限公司 | Low-frequency circuit breaker transmission mechanism |
| CN114242536B (en) * | 2022-01-12 | 2023-08-29 | 山东泰开高压开关有限公司 | Low-frequency circuit breaker transmission mechanism |
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| 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 |