CN207834240U - One kind prevents circuit breaker arc from restriking device - Google Patents
One kind prevents circuit breaker arc from restriking device Download PDFInfo
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- CN207834240U CN207834240U CN201721839811.6U CN201721839811U CN207834240U CN 207834240 U CN207834240 U CN 207834240U CN 201721839811 U CN201721839811 U CN 201721839811U CN 207834240 U CN207834240 U CN 207834240U
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- breaker
- linkage
- moving contact
- arc
- static contact
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Abstract
The utility model embodiment discloses a kind of device for preventing circuit breaker arc from restriking, in the breaker with shielding arc-control device, when cutting off short-circuit current, before its moving contact and static contact are opened completely, reliably it is isolated between the static contact and moving contact of linkage mechanism control breaker in the device, to before the moving contact and static contact of breaker are opened completely, due to being reliably isolated between static contact and moving contact, even if rebound phenomenon of the moving contact after reprimand is opened has occurred, moving contact will not touch static contact, and then avoid arc reignition.
Description
Technical field
The present invention relates to power domains more particularly to one kind to prevent circuit breaker arc from restriking device.
Background technology
Breaker is industry and the important electric elements in civilian low-voltage distribution apparatus, is applied to low-voltage distribution system more,
The overload and short trouble of distribution line are protected.Wherein short trouble protection is its most important function, due to short circuit
The short circuit current of circuit is very big when failure, and breaker will produce energy very in disjunction short circuit current between its dynamic and static contact
Big plasma arc (electric arc is conductive), only by certain technical measures quickly by arc extinction, breaker ability
Complete the task of disjunction short circuit current.
But during breaker completes disjunction short circuit current, will appear arc reignition phenomenon once in a while, and this electricity
Arc, which is restriked, will result in the consequence of disjunction failure.Currently, a kind of device can prevent arc reignition not yet.Therefore, how to keep away
Exempt from the arc reignition phenomenon that breaker occurs during disjunction short circuit current, being that those skilled in the art are urgently to be resolved hurrily asks
Topic.
Invention content
In order to solve the above technical problems, an embodiment of the present invention provides one kind to prevent circuit breaker arc from restriking device, having
It,, should before moving contact and static contact opening completely when cutting off short-circuit current in the breaker for having shielding arc-control device
In device linkage mechanism control breaker dynamic and static contact between be reliably isolated, due to be between static contact and moving contact can
By isolation, even if rebound phenomenon of the moving contact after reprimand is opened has occurred, moving contact will not touch static contact, and then keep away
Arc reignition is exempted from.
An embodiment of the present invention provides following technical solutions：
One kind prevents circuit breaker arc from restriking device, including：
Linkage mechanism, it is reliable between the moving contact of breaker and static contact for before receiving the first signal, controlling
Isolation, wherein first signal refers to the moving contact and the completely open signal of static contact of breaker；
Wherein, linkage mechanism includes linkage limiting plate, bearing, linkage torsional spring and linkage pivot pin, and linkage limiting plate passes through branch
Seat, linkage torsional spring and linkage pivot pin are screwed on killer switch pedestal；
When the insulation shielding in the shielding arc-control device of breaker cover under electromagnetic force by static contact and moving contact it
Between while reliably shield, the linkage limiting plate in linkage mechanism rotates clockwise under linkage torsional spring effect, in breaker
Before moving contact and static contact are opened completely, an insulating shroud that shielding action has been completed in control is always held at shielding shape
State.
Wherein, further include that first signal is provided by the control device that control breaker is opened.
Wherein, after receiving the first signal, the linkage mechanism is additionally operable to, and controls the moving contact and stationary contact of breaker
Non-isolated state is between head.
Wherein, the linkage mechanism is specifically used for, and control shielding arc-control device is restored to opening state.
Compared with prior art, above-mentioned technical proposal has the following advantages：
The device that the embodiment of the present invention is provided, before the moving contact and static contact of breaker are opened completely, the device
In linkage mechanism control breaker static contact and moving contact between be reliably isolated, to breaker moving contact and stationary contact
Before head is opened completely, due to being reliably isolated between static contact and moving contact, even if moving contact has occurred after reprimand is opened
Rebound phenomenon, moving contact will not touch static contact and generate electric arc, and then avoid arc reignition.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is provided by one embodiment of the invention a kind of prevents circuit breaker arc from restriking the schematic diagram of device；
Fig. 2 provides for another of the invention embodiment a kind of prevents circuit breaker arc from restriking the schematic diagram of device；
The numeral mark in attached drawing is illustrated below：
101- static contacts, 102- moving contacts, 103- an insulating shrouds, 104- shaft pivot pins, 105- short circuit instantaneous releases
And actuating mechanism, 106- switch pedestals, 107- linkage springs, 108- linkage pivot pins, 109- bearings, 110- linkage limiting plates,
111- mechanisms shaft, 201- static contacts, 202- moving contacts, 203- shaft pivot pins, 204- short circuits instantaneous release and actuating mechanism,
205- an insulating shrouds, 206- linkage mechanisms, 207- mechanisms shaft.
Specific implementation mode
Just as described in the background section, the arc reignition for how avoiding breaker from occurring during disjunction short circuit current
Phenomenon is those skilled in the art's urgent problem to be solved.
Inventor has found that, in short trouble, the shielding arc-control device in breaker is by after arc extinction, and breaker is short
It is opened under the control of road instantaneous release and actuating mechanism, after the moving contact and static contact of breaker are opened completely, moves and touch
Head would not be sprung back again.Moving contact of breaker springs back phenomenon of restriking, and is short-circuit instantaneous release and action machine due to breaker
The actuation time of structure and moving contact holding time after reprimand is opened under electrodynamic repulsion force effect are uncoordinated, caused by moving contact is sprung back.
Such as, under short circuit current effect, the moving contact so that breaker is acted in the short-circuit instantaneous release and actuating mechanism of breaker
Before being opened completely with static contact, the dynamic and static contact of breaker is denounceed first under electrodynamic repulsion force effect to be opened, and shielding arc-control device is same
When perform the action of shielding, after cutting off short circuit current, shielding arc-control device after and perform open action, shield arc extinguishing
So that the static contact and moving contact of breaker are no longer isolated after device action, if at this moment moving contact reprimand has rebound phenomenon after opening,
It will make static contact and moving contact contact to cause arc reignition.
In order to solve the above-mentioned technical problem, an embodiment of the present invention provides one kind to prevent circuit breaker arc from restriking device, this
The core concept of invention is, before the moving contact and static contact of breaker are opened completely, control breaker static contact and
Reliably it is isolated between moving contact, thus before the moving contact and static contact of breaker are opened completely, due to static contact and moves tactile
Reliably it is isolated between head, even if moving contact rebound phenomenon has occurred, moving contact will not touch static contact, and then keep away
Arc reignition is exempted from.
One kind, which is described below, prevents circuit breaker arc from restriking device, and described device includes：
Linkage mechanism, it is reliable between the moving contact of breaker and static contact for before receiving the first signal, controlling
Isolation, wherein first signal refers to the moving contact and the completely open signal of static contact of breaker.
Linkage mechanism, it is reliable between the moving contact of breaker and static contact for before receiving the first signal, controlling
Isolation, wherein first signal refers to the moving contact and the completely open signal of static contact of breaker；
Wherein, linkage mechanism includes linkage limiting plate, bearing, linkage torsional spring and linkage pivot pin, and linkage limiting plate passes through branch
Seat, linkage torsional spring and linkage pivot pin are screwed on killer switch pedestal.
When the insulation shielding in the shielding arc-control device of breaker cover under electromagnetic force by static contact and moving contact it
Between while reliably shield, the linkage limiting plate in linkage mechanism rotates clockwise under linkage torsional spring effect, in breaker
Before moving contact and static contact are opened completely, an insulating shroud that shielding action has been completed in control is always held at shielding shape
State.
As it can be seen that the linkage mechanism in above-described embodiment of the application, complete in the moving contact and static contact for receiving breaker
Before the signal opened entirely, an insulating shroud for controlling breaker is always held at masked state so that the static contact of breaker
Reliably it is isolated between moving contact, to before the moving contact and static contact of breaker are opened completely, due to static contact and move
Reliably it is isolated between contact, even if moving contact rebound phenomenon has occurred, moving contact will not touch static contact, Jin Erliao
Avoid arc reignition.
Wherein, first signal is provided by the control device that control breaker is opened.
For example, if breaker controls its opening, control dress by short-circuit instantaneous release therein and actuating mechanism
It sets as short-circuit instantaneous release and actuating mechanism.For example, can be turned by the mechanism in short-circuit instantaneous release and actuating mechanism
Axis provides the opening signal of breaker, and linkage mechanism controls the shielding arc-control device of breaker before not receiving the signal
It is always held at masked state so that be constantly in the state being reliably isolated between the moving contact and static contact of breaker.
Wherein, the linkage mechanism is specifically used for, and control shielding arc-control device is maintained at the moving contact of breaker and quiet
The masked state being reliably isolated between contact.
Specifically, when short trouble occurs in circuit, the shielding arc-control device in breaker is rapidly due to electrodynamic repulsion force
Reprimand open after moving contact and static contact between be inserted into insulation screen, by insulation screen by moving contact and static contact reliably every
From.In embodiments herein, before the moving contact and static contact of breaker are opened completely, linkage control shielding is gone out
Arc device is maintained at the masked state being reliably isolated between moving contact and static contact by breaker.
The type of the shielding arc-control device in breaker is not limited in the present invention, it will be breaking as long as can realize
The arc-control device that the moving contact and static contact of device are reliably isolated, for example, arc-control device can be the arc-control device of jaw type, also
It can be plug-type arc-control device, can also be the arc-control device of bell-type, can also be the arc-control device of other formulas certainly,
This is not listed one by one.
Wherein, after receiving the first signal, the linkage mechanism is additionally operable to, and controls the moving contact and stationary contact of breaker
Non-isolated state is between head.The linkage mechanism is specifically used for, and control shielding arc-control device is restored to opening state.
Since after receiving the first signal, breaker is in moving contact and static contact full open position, moving contact
Rebound phenomenon would not occur, non-isolated state is between the moving contact of breaker and static contact so at this moment can control.
Specifically, after breaker is in moving contact and static contact full open position, control shielding arc-control device is restored to opening
State, so that being in non-isolated state between moving contact and static contact, i.e. control shields arc-control device homing, to
So that breaker enters next working cycles state.
It is exemplified below, how the mechanism shaft in breaker in short-circuit instantaneous release and actuating mechanism provides open circuit
The opening signal of device.It is of course also possible to be provided using other component in short-circuit instantaneous release in breaker and actuating mechanism disconnected
The opening signal of road device can also utilize other control devices in breaker to provide the opening signal of breaker.Linkage mechanism
Can be other structures, as long as heretofore described function can be realized.It is merely illustrative, does not limit herein
In such mode.
Linkage mechanism includes linkage limiting plate, bearing, linkage torsional spring and linkage pivot pin, and linkage limiting plate passes through bearing, connection
Dynamic torsional spring and linkage pivot pin are screwed on killer switch pedestal.Short-circuit instantaneous release and actuating mechanism and static contact
The shielding arc-control device installed above with static contact is similarly installed in switch pedestal.
When the insulation shielding in above-mentioned shielding arc-control device covers under electromagnetic force will be between static contact and moving contact
While reliable shielding, the linkage limiting plate in linkage mechanism rotates clockwise under linkage torsional spring effect, dynamic by shielding is completed
Masked state is controlled and be allowed to be maintained to an insulating shroud of work, cannot before short-circuit instantaneous release and actuating mechanism action
It opens, thus effectively prevents the moving contact of breaker and static contact opens preceding generation arc reignition phenomenon completely.
For example, if shielding arc-control device is jaw type, the shielding arc-control device of jaw type utilizes two insulation shieldings
Cover will reliably shield between static contact and moving contact, and the form that snap-gauge may be used in the limiting plate that at this moment links blocks two insulation screens
Cover is covered, as shown in Figure 1.If it is plug-type or bell-type to shield arc-control device, i.e., adopted from the actuating mechanism side of breaker
When shielding moving contact and static contact with the mode be inserted into or covered, top plate may be used in the linkage limiting plate in linkage mechanism
Form withstands shielding arc-control device, as shown in Figure 2.
Whether the moving contact and static contact of breaker are opened, the short-circuit instantaneous release by breaker and actuating mechanism control
System after at this moment being opened completely after the moving contact and static contact of breaker, is led to after short-circuit instantaneous release and actuating mechanism action
The linkage limiting plate for the open-top linkage mechanism of mechanism shaft crossed in actuating mechanism is allowed to reset counterclockwise.The mechanism shaft is short
A part for road instantaneous release and actuating mechanism, the rotation that the linkage limiting plate in linkage mechanism passes through mechanism shaft touch production
Life is rotated counterclockwise and is resetted, and after short circuit current disappears, shielding arc-control device resets to original opening state therewith, due to shielding
Torsional spring power is more than the linkage torsional spring counter-force of linkage mechanism after the reset of arc-control device, and linkage mechanism is forced to be in reset state,
Breaker enters subsequent work recurrent state.
In summary, when short trouble occurs in circuit, short circuit current generated strong-electromagnetic field around static contact
Shielding arc-control device action is driven under effect, is inserted between the moving contact and static contact after being opened due to electrodynamic repulsion force reprimand rapidly exhausted
Edge shielded layer will be reliably isolated by insulation screen between moving contact and static contact, to keep electric arc rapid at the initial stage of generation
Extinguish, at the same time short-circuit instantaneous release and actuating mechanism action so that moving contact of breaker and static contact are opened completely, complete
At entire breaking course.
In this process, if shielding arc-control device before short-circuit instantaneous release and actuating mechanism action prior to executing
Opening action, and occur moving contact reprimand and open rear rebound phenomenon, it will cause arc reignitions.Moving contact is sprung back in order to prevent
Arc reignition, the present invention is caused to devise linkage mechanism so that shielding arc-control device is after shielding action rapidly by linkage mechanism
In linkage limiting plate control, be allowed to be maintained at screening-off position, short-circuit instantaneous release and actuating mechanism action before cannot
It opens, i.e., cannot be opened before the static contact of breaker and moving contact are opened completely.Wait for short-circuit instantaneous release and action machine
After structure action, i.e., after the static contact of breaker and moving contact are opened completely, pass through the mechanism shaft in actuating mechanism
Linkage limiting plate in open-top linkage mechanism so that linkage limit sheet reset, the linkage mechanism just no longer control shielding after reset
Arc-control device, after linkage mechanism reset, the shielding arc-control device of breaker resets to original opening state therewith.It is existing in this way
Effect is preceding before preventing the moving contact of breaker and static contact to open completely to occur arc reignition phenomenon.It can make again short-circuit instantaneous
After buckle releaser and actuating mechanism action make the moving contact of breaker and static contact open completely, and after short circuit current disappearance, shielding
Arc-control device automatically restores to original opening state.Since shielding torsional spring power is more than gear after the reset of shielding arc-control device
The linkage torsional spring counter-force of linkage limiting plate in structure, linkage mechanism are forced to be in reset state, and breaker enters subsequent work
Recurrent state.
As it can be seen that the present invention breaker static contact load shielding arc-control device on the basis of, shielding arc-control device with
Between the short-circuit instantaneous release and actuating mechanism of breaker by one cleverly linkage mechanism so that them is established contact, make
Breaker short-circuit instantaneous release and actuating mechanism control the shielding arc-control device of breaker before action and can not beat
It opens, keeps masked state, thus effectively prevent arc reignition phenomenon caused by being sprung back after moving contact reprimand is opened.
Various pieces are described by the way of progressive in this specification, and what each some importance illustrated is and other parts
Difference, just to refer each other for identical similar portion between various pieces.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to embodiment illustrated herein, and is to fit to consistent with the principles and novel features disclosed in this article
Widest range.
Claims (4)
1. one kind prevents circuit breaker arc from restriking device, which is characterized in that including：
Linkage mechanism, for before receiving the first signal, controlling and being reliably isolated between the moving contact of breaker and static contact,
Wherein described first signal refers to the moving contact and the completely open signal of static contact of breaker；
Wherein, linkage mechanism includes linkage limiting plate, bearing, linkage torsional spring and linkage pivot pin, and linkage limiting plate passes through bearing, connection
Dynamic torsional spring and linkage pivot pin are screwed on killer switch pedestal；
When the insulation shielding in the shielding arc-control device of breaker covers on can between static contact and moving contact under electromagnetic force
While by shielding, the linkage limiting plate in linkage mechanism rotates clockwise under linkage torsional spring effect, and dynamic in breaker touches
Before head and static contact are opened completely, an insulating shroud that shielding action has been completed in control is always held at masked state.
2. the apparatus according to claim 1, which is characterized in that further include that first signal is opened by control breaker
Control device provide.
3. the apparatus according to claim 1, which is characterized in that after receiving the first signal, the linkage mechanism is also
For controlling and being in non-isolated state between the moving contact of breaker and static contact.
4. device according to claim 3, which is characterized in that the linkage mechanism is specifically used for, control shielding interrupter cartridge
It sets and is restored to opening state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721839811.6U CN207834240U (en) | 2017-12-26 | 2017-12-26 | One kind prevents circuit breaker arc from restriking device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721839811.6U CN207834240U (en) | 2017-12-26 | 2017-12-26 | One kind prevents circuit breaker arc from restriking device |
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| CN207834240U true CN207834240U (en) | 2018-09-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113555260A (en) * | 2021-08-20 | 2021-10-26 | 广东电网有限责任公司 | Arc extinguishing and breaking device |
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2017
- 2017-12-26 CN CN201721839811.6U patent/CN207834240U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113555260A (en) * | 2021-08-20 | 2021-10-26 | 广东电网有限责任公司 | Arc extinguishing and breaking device |
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