CN204577320U - A kind of vacuum arc-extinguishing chamber contact - Google Patents
A kind of vacuum arc-extinguishing chamber contact Download PDFInfo
- Publication number
- CN204577320U CN204577320U CN201520338784.9U CN201520338784U CN204577320U CN 204577320 U CN204577320 U CN 204577320U CN 201520338784 U CN201520338784 U CN 201520338784U CN 204577320 U CN204577320 U CN 204577320U
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- contact
- magnetic field
- extinguishing chamber
- moving
- groove
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- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The utility model discloses a kind of vacuum arc-extinguishing chamber contact, aim to provide a kind of on the vacuum interrupter, the eddy current that contact produces in alternating magnetic field can be reduced, reduce eddy current to the contact of the impact of contact connecting-disconnecting function, its drip irrigation device is, comprise two contacts, be respectively fixed contact, moving contact, contact is respectively arranged with the installing hole installed for conducting rod, fixed contact, moving contact is provided with some grooves, groove from heart outward to setting, contact is divided into some independently blocks by groove, the distributing position of distinctive groove on fixed contact and moving contact, the path of original current field can be blocked, reduce the impact of current field on original contact longitudinal magnetic field, thus reduce the loss of contact longitudinal magnetic field, improve contact connecting-disconnecting function.
Description
Technical field
The utility model relates to the electron tube technical field of low pressure for distribution, and more particularly, it relates to a kind of contact be used on vacuum interrupter.
Background technology
Vacuum interrupter, be the core component of mesohigh power switch, its Main Function is, by can blow-out suppress electric current rapidly after managing the excellent insulating properties of interior vacuum and making mesohigh circuitry cuts power supply, avoid accident and unexpected generation, be mainly used in the power transmission and distribution control system of electric power.
Contact is the position producing electric arc, extinguish arcs, it is the core component of vacuum interrupter, contact comprises fixed contact, moving contact, be separately fixed on static conductive rod, moving conductive rod, the connecting-disconnecting function of structure of contact terminal to arc eliminating chamber has a significant impact, the arc quenching effect adopting different structure contact to produce is different, often adopts to adopt vertical magnetic field cup-like structure contact.
In cup-shaped structure of contact terminal as shown in Figure 1, when have electric current by time, electric current can be decomposed into tangential component I1 and axial component I2 on cup-shaped (contact base).When contact band is electrically separated, vacuum arc is produced in contact gap, I1 produces longitudinal magnetic field B1 in contact gap, I2 produces tangential magnetic field B2, because the longitudinal magnetic field that contact produces and arc current are alternations, when the metallic object of bulk is in the magnetic field of constantly change, induced current will be produced in metallic object inside, such electric current has closed-loop path of one's own in metallic object inside, namely vortex flow is created, vortex flow is the same with contact longitudinal magnetic field is alternation, alternation vortex flow creates the current field of change, the flow direction that this current field is somebody's turn to do and tangential magnetic field B2 similar, do not produce staggered with tangential magnetic field B2, but produce staggered with longitudinal magnetic field B1, consume is produced to contact longitudinal magnetic field, contact magnetic field is made to lag behind electric current, affect contact connecting-disconnecting function.
Utility model content
For the deficiency that prior art exists, the purpose of this utility model be to provide a kind of on vacuum interrupter, the eddy current that contact produces in alternating magnetic field can be reduced, reduce eddy current to the contact of the impact of contact connecting-disconnecting function.
For achieving the above object, the utility model provides following technical scheme:
A kind of vacuum arc-extinguishing chamber contact, comprise two contacts, be respectively fixed contact, moving contact, described contact is respectively arranged with the installing hole installed for conducting rod, described fixed contact, moving contact are provided with some grooves, described groove is from heart outward to setting, and contact is divided into some independently blocks by described groove.
Setting like this, object fixed contact and moving contact offering groove is the path in order to block original current field, tangential magnetic field B2 is spaced, the radial magnetic flux of the every part separated slightly reduces, its induced electromotive force is corresponding minimizing also, to produce staggered area less with longitudinal magnetic field B1, the average cross-section that eddy current passes through obviously reduces, therefore, this eddy current produces consume to contact longitudinal magnetic field and also reduces accordingly, make contact magnetic field less can lag behind electric current, reduce electric current to contact influence of magnetic field in other words conj.or perhaps, thus improve contact connecting-disconnecting function.
Further setting: described groove is formed to internal cutting by the outer peripheral face of contact, described groove is greater than the radius of installing hole to the minimum range of contact center.
Further setting: described fixed contact, moving contact setting in the form of annular discs.
Further setting: the end face that described fixed contact, moving contact abut against is provided with bevelling.
By adopting technique scheme, the utility model hinge structure is compared to be had: the distributing position of distinctive groove on fixed contact and moving contact, the path of original current field can be blocked, reduce the impact of current field on original contact longitudinal magnetic field, thus reduce the loss of contact longitudinal magnetic field, improve contact connecting-disconnecting function.
Accompanying drawing explanation
Fig. 1 is the accompanying drawing explanation of background technology of the present utility model;
Fig. 2 is a kind of vacuum interrupter overall schematic of vacuum arc-extinguishing chamber contact;
Fig. 3 is a kind of axonometric drawing of vacuum arc-extinguishing chamber contact;
Fig. 4 is a kind of vertical view of vacuum arc-extinguishing chamber contact.
In figure: 1, fixed contact; 2, moving contact; 3, installing hole; 4, groove; 5, bevelling; 11, static conductive rod; 22, moving conductive rod.
Embodiment
Referring to figs. 1 through Fig. 4, a kind of vacuum arc-extinguishing chamber contact embodiment of the utility model is described further.
A kind of vacuum arc-extinguishing chamber contact, comprises fixed contact 1 and moving contact 2, fixed contact 1 and moving contact 2 setting in the form of annular discs, fixed contact 1, moving contact 2 is respectively arranged with the installing hole 3 installed for static conductive rod 11, moving conductive rod 22.
Fixed contact 1, moving contact 2 are provided with some vertical grooves 4, groove 4 is preferably provided with six, and the direction of groove 4 all from heart outward to setting, corresponding is divided into 6 pieces by fixed contact 1 or moving contact 2, is cut off between any two by groove 4.
Groove 4 is formed to internal cutting by the outer peripheral face of contact, and groove is greater than the radius of installing hole 3 to the minimum range of contact center.
The end face facing each other of fixed contact 1, moving contact 2 is provided with bevelling 5, better makes fixed contact 1, moving contact 2 conflicts mutually.
Why vertical magnetic field structure of contact terminal has good connecting-disconnecting function, is that arc current produces a longitudinal reaction magnetic (the longitudinal magnetic field B1 namely mentioned in background technology) because when contact separates.This Magnetic control arc current and is uniformly distributed in contact surface, and remains spreading morphology, makes contact surface can not produce the serious fusing in local and evaporation of metal.It is low that arc current has arc voltage, the good characteristic that arc energy is little.Therefore, when arc current zero passage, dielectric insulation intensity is recovered very fast, for successful drop-out current creates condition.
At arcing initial period, resultant magnetic field numerical value is less, and magnetic field now will not have the effect of stable arc.Result, during this section of arcing, because the current field flow direction of being somebody's turn to do and longitudinal magnetic field B1 produce staggered, just there will be higher arc voltage, and superposition has high fdrequency component.At this moment the energy of input electrode also will increase, and contact is melted, and produce a large amount of metal vapors, and the metal vapors in gap not easily spreads out and causes arc reignition, causes failure of interruption, brings adverse effect to drop-out current.
Contact is inductive loop in alternating magnetic field, contact magnetic field is made to lag behind electric current, reduce contact connecting-disconnecting function, therefore, in the program, on the basis meeting product electrical property, mechanical performance, take the groove 4 being provided with unique location relation, block eddy current, reduced the impact of eddy current on longitudinal reaction magnetic, made structure of contact terminal design reach desirable and cut-off effect.
The above is only preferred implementation of the present utility model, protection range of the present utility model be not only confined to above-described embodiment, and all technical schemes belonged under the utility model thinking all belong to protection range of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (4)
1. a vacuum arc-extinguishing chamber contact, comprise two contacts, be respectively fixed contact, moving contact, described contact is respectively arranged with the installing hole installed for conducting rod, it is characterized in that: described fixed contact, moving contact are provided with some grooves, described groove is from heart outward to setting, and contact is divided into some independently blocks by described groove.
2. a kind of vacuum arc-extinguishing chamber contact according to claim 1, is characterized in that: described groove is formed to internal cutting by the outer peripheral face of contact, and described groove is greater than the radius of installing hole to the minimum range of contact center.
3. a kind of vacuum arc-extinguishing chamber contact according to claim 1 and 2, is characterized in that: the setting in the form of annular discs of described fixed contact, moving contact.
4. a kind of vacuum arc-extinguishing chamber contact according to claim 1 and 2, is characterized in that: the end face that described fixed contact, moving contact abut against is provided with bevelling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520338784.9U CN204577320U (en) | 2015-05-23 | 2015-05-23 | A kind of vacuum arc-extinguishing chamber contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520338784.9U CN204577320U (en) | 2015-05-23 | 2015-05-23 | A kind of vacuum arc-extinguishing chamber contact |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204577320U true CN204577320U (en) | 2015-08-19 |
Family
ID=53869921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520338784.9U Expired - Fee Related CN204577320U (en) | 2015-05-23 | 2015-05-23 | A kind of vacuum arc-extinguishing chamber contact |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204577320U (en) |
-
2015
- 2015-05-23 CN CN201520338784.9U patent/CN204577320U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160606 Address after: 361000, No. 56, Tong An garden, Tongan Industrial Concentration Zone, Tongan District, Fujian, Xiamen Patentee after: Xiamen Sen Light Electric Technology Co., Ltd. Address before: 325608, No. twenty, No. 288, Yueqing Economic Development Zone, Wenzhou, Zhejiang, Yueqing Patentee before: Zhejiang gloomy photoelectricity gas Science and Technology Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150819 Termination date: 20170523 |