CN104538238A - Grounding switch contact and direct movement plug-in type grounding switch with grounding switch contact - Google Patents
Grounding switch contact and direct movement plug-in type grounding switch with grounding switch contact Download PDFInfo
- Publication number
- CN104538238A CN104538238A CN201410854940.7A CN201410854940A CN104538238A CN 104538238 A CN104538238 A CN 104538238A CN 201410854940 A CN201410854940 A CN 201410854940A CN 104538238 A CN104538238 A CN 104538238A
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- CN
- China
- Prior art keywords
- contact electrode
- end contact
- earthed switch
- quiet end
- switch contact
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention provides a grounding switch contact and a direct movement plug-in type grounding switch with the grounding switch contact. The grounding switch contact comprises a fixed end contact electrode and a movable end contact electrode, the fixed end contact electrode is fixedly arranged, the movable end contact electrode is movably arranged in the axial direction of the fixed end contact electrode and has a closing position nested with the fixed end contact electrode and an opening position separated from the fixed end contact electrode, the fixed end contact electrode comprises a magnetic device arranged on the switch contact, and the magnetic device can generate a longitudinal magnetic field parallel to the axial direction of the fixed end contact electrode. By means of the technical scheme, the problem that large-current opening and closing cannot be achieved through a direction movement plug-in type grounding switch in the prior art easily can be effectively solved.
Description
Technical field
The present invention relates to high-tension switch cabinet apparatus field, in particular to a kind of earthed switch contact and the direct acting plug-in type earthed switch with it.
Background technology
In electric power system, earthed switch has the needs that short circuit closes.During earthed switch closing operation, because there is " pre-volt property short trouble " phenomenon in system, requiring that earthed switch making process can bear and closing short circuit load.According to standard GB1985-2004 regulation, there is the E1 level earthed switch of short circuit current making capability, no matter electric pressure, all should stand 2 short circuits and close closing operation.For rated voltage 40.5kV and the following E2 level earthed switch with short circuit current making capability, short circuit closes number of operations and is increased to 5 times.
Direct acting plug-in type earthed switch of the prior art, its big current to close effect unsatisfactory, be difficult to be grounded the object that short circuit closes.It is current that to improve major measure that earthed switch closes operational capacity be close sum velocity and reduce prebreakdown by improving and open distance, prebreakdown opens distance for puncturing clearance between open contacts during generation, and prebreakdown is opened apart from larger, and the arcing time is longer, arc energy is larger, and the possibility successfully closed is lower.But the method that sum velocity is closed in above-mentioned raising requires that earthed switch need configure more high-output and low-resistance operating mechanism.Ground connection pass sum velocity just realizes the requirement that short circuit closes when reaching the velocity interval of more than 5m/s, this is be difficult to realize to the direct acting plug-in type earthing switch operating mechanism only with general operation merit.Simultaneously, the prebreakdown phenomenon that ground connection closes in process is relevant with several factors, except closing the impact of sum velocity, is also subject to the effect of the factors such as contact material, contact surface situation, contact gap magnetic field.
Summary of the invention
Main purpose of the present invention is the direct acting plug-in type earthed switch providing a kind of earthed switch contact and have it, is difficult to realize to solve direct acting plug-in type earthed switch of the prior art the problem that big current closes.
To achieve these goals, according to an aspect of the present invention, provide a kind of earthed switch contact, comprise: quiet end contact electrode and moved end contact electrode, quiet end contact electrode is fixedly installed, moved end contact electrode is along the axially movable setting of quiet end contact electrode, and the open position that there is the conduction position mutually nested with quiet end contact electrode and be separated from each other with quiet end contact electrode, quiet end contact electrode comprises the magnetic devices be arranged on switch contact, magnetic devices be can produce be parallel to quiet end contact electrode axis to longitudinal magnetic field.
Further, magnetic devices is annular magnet.
Further, annular magnet is set on the sidewall of quiet end contact electrode.
Further, quiet end contact electrode also comprises the multiple groovings on the sidewall being arranged on quiet end contact electrode, and the sidewall of the through quiet end contact electrode of multiple grooving is to be divided into multiple diversion division by the sidewall of quiet end contact electrode.
Further, grooving extends along the axial direction of quiet end contact electrode.
Further, grooving is arranged on the sidewall of quiet end contact electrode uniformly.
Further, quiet end contact electrode is quiet conductive tube.
According to a further aspect in the invention, provide a kind of direct acting plug-in type earthed switch, comprise earthed switch contact, earthed switch contact is above-mentioned earthed switch contact.
Apply technical scheme of the present invention, earthed switch contact comprises quiet end contact electrode and moved end contact electrode, and earthed switch contact is provided with magnetic devices.Magnetic devices can produce be parallel to quiet end contact electrode axis to longitudinal magnetic field, magnetic control means be configured to moved end contact electrode by open position to conduction position switch produce prebreakdown electric arc time, longitudinal magnetic field produces magnetic blow-out effect to prebreakdown electric arc, suppress prebreakdown arc constriction, reduce prebreakdown arc energy, alleviate prebreakdown electric arc switching devices arc erosion, avoid the contact melting welding caused because of contact local surfaces over hot melting, and then reduce earthed switch close rate request, make earthed switch be more prone to realize big current to close, improve earthed switch to the folding ability of big current.Therefore the direct acting plug-in type earthed switch that technical scheme of the present invention effectively can solve prior art is difficult to realize the problem that big current closes.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the structural representation of the embodiment according to earthed switch contact of the present invention;
Fig. 2 shows the schematic perspective view of the quiet end contact electrode of the earthed switch contact of Fig. 1;
Fig. 3 shows the elevational schematic of the quiet end contact electrode of Fig. 2;
Fig. 4 shows the schematic perspective view of the moved end contact electrode of the earthed switch contact of Fig. 1;
Fig. 5 shows the elevational schematic of the moved end contact electrode of Fig. 4;
Fig. 6 shows the principle schematic of the earthed switch contact generation longitudinal magnetic field of Fig. 1;
Fig. 7 shows the structural representation of the embodiment according to direct acting plug-in type earthed switch of the present invention.
Wherein, above-mentioned accompanying drawing comprises the following drawings mark:
10, quiet end contact electrode; 11, quiet conductive tube; 12, grooving; 13, diversion division; 20, moved end contact electrode; 30, magnetic devices;
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
In the prior art, the contact design of tradition direct acting plug-in type earthed switch also lacks the magnetic field in electrode contact gap the consideration of prebreakdown electric arc influence, fail the magnetic blow-out effect in magnetic field to be successfully applied to earthed switch to close on closing operation, earthed switch successfully closes short circuit current and still has difficulties.The earthed switch contact of the application applies the magnetic blow-out effect of magnetic field to prebreakdown electric arc, effectively solves the problems referred to above.
As shown in Figure 1, the earthed switch contact of the present embodiment comprises quiet end contact electrode 10, moved end contact electrode 20 and magnetic devices 30.Quiet end contact electrode 10 is fixedly installed, moved end contact electrode 20 is along the axially movable setting of quiet end contact electrode 10, and the open position that there is the conduction position mutually nested with quiet end contact electrode 10 and be separated from each other with quiet end contact electrode 10, magnetic devices 30 is to produce the longitudinal magnetic field being parallel to quiet end contact electrode 10 axis.
The technical scheme of application the present embodiment, earthed switch contact comprises quiet end contact electrode 10 and moved end contact electrode 20, and earthed switch contact is provided with magnetic devices 30.Magnetic devices 30 can produce the longitudinal magnetic field being parallel to quiet end contact electrode 10 axis, magnetic devices 30 be configured to moved end contact electrode 20 by open position to conduction position switch produce prebreakdown electric arc time, longitudinal magnetic field produces magnetic blow-out effect to prebreakdown electric arc.Suppress prebreakdown arc constriction, reduce prebreakdown arc energy, alleviate prebreakdown electric arc switching devices arc erosion, avoid the contact melting welding caused because of contact local surfaces over hot melting, and then reduce earthed switch close rate request, make earthed switch be more prone to realize big current to close, improve earthed switch to the folding ability of big current.Therefore the direct acting plug-in type earthed switch that technical scheme of the present invention effectively can solve prior art is difficult to realize the problem that big current closes.
In the present embodiment, the contact jaw of quiet end contact electrode 10 and moved end contact electrode 20 is all welded with contact blade.Contact blade adopts resistance to ablation Tungsten-copper Composites to make, and partly can keep out the prebreakdown electric arc produced between quiet end contact electrode 10 and moved end contact electrode 20, and then the ability that increase earthed switch closes big current.
As shown in Figure 1, in the technical scheme of the present embodiment, magnetic devices 30 is annular magnet.Annular magnet can provide the longitudinal magnetic field being parallel to quiet end contact electrode 10 axis.Earthed switch close in process produce prebreakdown electric arc time, longitudinal magnetic field between quiet end contact electrode 10 and moved end contact electrode 20 can suppress the contraction of prebreakdown electric arc, increase arc column radius, make prebreakdown electric arc more easily remain diffusion morphotype formula, reduce electrodynamic repulsion force when closing.Reduce arc energy simultaneously, make quiet end contact electrode 10 or moved end contact electrode 20 ablated surface slighter.
In the present embodiment, annular magnet adopts ndfeb magnetic material to make.Ndfeb magnetic material can provide the magnetic field of high strength, and then strengthens magnetic field to the magnetic blow-out effect of prebreakdown electric arc, reaches the effect better suppressing prebreakdown electric arc.
As shown in Figure 1, in the technical scheme of the present embodiment, magnetic devices 30 is not limited to annular magnet, can adopt other magnetic partss, such as be energized parallel guide plate, specifically meets and can produce longitudinal magnetic field in the gap between quiet end contact electrode 10 and moved end contact electrode 20.
As shown in Figure 1, in the technical scheme of the present embodiment, annular magnet is set on the sidewall of quiet end contact electrode 10.In the present embodiment, annular magnet is set in the bottom of quiet end contact electrode 10, and structure is simply convenient to manufacture.Certainly, the position of annular magnet is not fixed, and in order to the magnetic field obtaining varying strength can adjust the position of annular magnet, and then can suppress the prebreakdown electric arc of varying strength.The particular location of annular magnet needs to determine according to reality of work.
As shown in Figures 2 and 3, in the technical scheme of the present embodiment, quiet end contact electrode 10 also comprises the multiple groovings 12 on the sidewall being arranged on quiet end contact electrode 10, and the sidewall of the through quiet end contact electrode 10 of multiple grooving 12 is to be divided into multiple diversion division 13 by the sidewall of quiet end contact electrode 10.
In the present embodiment, quiet end contact electrode 10 is divided into specifically acting as of multiple diversion division 13:
1, be separated conductive path, reduce the hoop eddy current on quiet end contact electrode 10 and moved end contact electrode 20, and then the temperature rise that reduction dynamic/static contact produces because of vortex heat, improve the rated current of earthed switch.
2, making quiet end contact electrode 10 can bear moved end contact electrode 20 is wearing into the mechanical deformation in quiet conductive tube 11 process, increases the electrical-contact area of dynamic/static contact when earthed switch closes a floodgate, reduces contact resistance, reduces closing electrodynamic repulsion force simultaneously.
As shown in Figures 2 and 3, in the technical scheme of the present embodiment, grooving 12 extends along the axial direction of quiet end contact electrode 10.Grooving 12 adopts vertical direction extended structure simple, is convenient to processing.
As shown in Figures 2 and 3, in the technical scheme of the present embodiment, grooving 12 is arranged on the sidewall of quiet end contact electrode 10 uniformly, can in the process that closes at earthed switch of uniform pickup, quiet end contact electrode 10 is wearing into the mechanical deformation in quiet conductive tube 11 process due to moved end contact electrode 20, and then strengthens Stability Analysis of Structures type.
As shown in Figures 2 to 5, in the technical scheme of the present embodiment, quiet end contact electrode 10 has towards one end of moved end contact electrode 20 the quiet conductive tube 11 holding moved end contact electrode 20.Quiet end contact electrode 10 is fixedly installed, and moved end contact electrode 20 is arranged on directly over quiet end contact electrode 10, and moved end contact electrode 20 can axially move up and down.When earthed switch complete close closing operation time, moved end contact electrode 20 moves towards quiet end contact electrode 10, and moved end contact electrode 20 is arranged in quiet conductive tube 11, and what realize moved end contact electrode 20 and quiet end contact electrode 10 contacts conducting.
As shown in Figure 6, in the technical scheme of the present embodiment, suppose the N pole of described annular magnet upward, S pole down, the magnetic line of force then formed between outside N, S pole of annular magnet is for counterclockwise, if annular magnet magnetic field is enough strong, then excitation can produces an external parallel longitudinal magnetic field Ba in contact gap, be directed upwardly.Direct acting plug-in type earthed switch closes in process, and the distance between in quiet end contact electrode 10 and moved end contact electrode 20 is more and more less, and cause when cannot bear additional voltage, gap breakdown produces prebreakdown electric arc, and arc current is I.The external longitudinal magnetic field Ba of described generation is above parallel to prebreakdown electric arc equally, so prebreakdown electric arc will be subject to the magnetic blow-out effect of an external longitudinal magnetic field in gap.
Prebreakdown electric arc is subject to the effect of longitudinal magnetic field Ba, produces a magnetic confinement power, suppresses the contraction of arc current and gathers, and makes to wear electric arc and more easily remains a diffusion morphotype formula, and then closes electrodynamic repulsion force and significantly reduce.Simultaneously under longitudinal magnetic field Ba magnetic blow-out effect, prebreakdown electric arc arc column radius increases, the ion, the electron number that arrive contact surface increase, so contact surface current density reduces, prebreakdown arc voltage and arc energy reduce, contact surface ablation is more slight, avoids contact melting welding when big current closes.
Outside secondary, when prebreakdown arc current direction is with when in Fig. 6, arc current direction is contrary, the direction that prebreakdown electric arc is subject to longitudinal magnetic field Ba magnetic confinement power changes, but magnetic confinement effect is constant, and magnetic blow-out effect is identical.On the other hand, when N, S pole location swap of annular magnet external in Fig. 6, then the magnetic line of force that between N, S, excitation is formed becomes clockwise direction, and down, but the magnetic blow-out effect of longitudinal magnetic field Ba remains unchanged equally in the external longitudinal magnetic field Ba direction that contact gap produces.
As shown in Figure 7, the present embodiment additionally provides a kind of direct acting plug-in type earthed switch, comprises earthed switch contact, and earthed switch contact is above-mentioned earthed switch contact.
Earthed switch contact comprises quiet end contact electrode 10 and moved end contact electrode 20, and earthed switch contact is provided with magnetic devices 30.Magnetic devices 30 can produce the longitudinal magnetic field being parallel to quiet end contact electrode 10 axis, and longitudinal magnetic field produces magnetic blow-out effect to prebreakdown electric arc.Alleviating the prebreakdown electric arc switching devices arc erosion that earthed switch produces when closing, avoiding the contact melting welding caused because of contact local surfaces over hot melting, and then improve earthed switch to the folding ability of big current.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. an earthed switch contact, comprise: quiet end contact electrode (10) and moved end contact electrode (20), described quiet end contact electrode (10) is fixedly installed, described moved end contact electrode (20) is along the axially movable setting of described quiet end contact electrode (10), and the open position that there is the conduction position mutually nested with described quiet end contact electrode (10) and be separated from each other with described quiet end contact electrode (10), it is characterized in that, described quiet end contact electrode comprises the magnetic devices (30) be arranged on described switch contact, described magnetic devices (30) is can produce to be parallel to the axial longitudinal magnetic field of described quiet end contact electrode (10).
2. earthed switch contact according to claim 1, is characterized in that, described magnetic devices (30) is annular magnet.
3. earthed switch contact according to claim 2, is characterized in that, described annular magnet is set on the sidewall of described quiet end contact electrode (10).
4. earthed switch contact according to claim 1, it is characterized in that, described quiet end contact electrode (10) also comprises the multiple groovings (12) on the sidewall being arranged on described quiet end contact electrode (10), and the sidewall of the through described quiet end contact electrode (10) of described multiple grooving (12) is to be divided into multiple diversion division (13) by the sidewall of described quiet end contact electrode (10).
5. earthed switch contact according to claim 4, is characterized in that, described grooving (12) extends along the axial direction of described quiet end contact electrode (10).
6. earthed switch contact according to claim 4, is characterized in that, described grooving (12) is arranged on the sidewall of described quiet end contact electrode (10) uniformly.
7. earthed switch contact according to claim 1, is characterized in that, described quiet end contact electrode (10) is quiet conductive tube (11).
8. a direct acting plug-in type earthed switch, comprises earthed switch contact, it is characterized in that, the earthed switch contact of described earthed switch contact according to any one of claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410854940.7A CN104538238A (en) | 2014-12-31 | 2014-12-31 | Grounding switch contact and direct movement plug-in type grounding switch with grounding switch contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410854940.7A CN104538238A (en) | 2014-12-31 | 2014-12-31 | Grounding switch contact and direct movement plug-in type grounding switch with grounding switch contact |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104538238A true CN104538238A (en) | 2015-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410854940.7A Pending CN104538238A (en) | 2014-12-31 | 2014-12-31 | Grounding switch contact and direct movement plug-in type grounding switch with grounding switch contact |
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| Country | Link |
|---|---|
| CN (1) | CN104538238A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1270404A (en) * | 1999-04-12 | 2000-10-18 | 三菱电机株式会社 | Switch |
| JP2008218001A (en) * | 2007-02-28 | 2008-09-18 | Mitsubishi Electric Corp | Electrode arrangement of gas-blast load-break switch |
| JP2011096474A (en) * | 2009-10-29 | 2011-05-12 | Toshiba Corp | Vacuum valve |
| CN103843097A (en) * | 2011-09-28 | 2014-06-04 | 伊顿公司 | Vacuum switch and hybrid switch assembly therefor |
| WO2014094724A1 (en) * | 2012-12-19 | 2014-06-26 | Kuckuck Jochen | Contact system for compensating arc contraction in power switches |
| CN103971981A (en) * | 2013-01-28 | 2014-08-06 | 株式会社日立制作所 | Gas-insulated switching device |
| CN204390967U (en) * | 2014-12-31 | 2015-06-10 | 北京双杰电气股份有限公司 | Earthed switch contact and there is its direct acting plug-in type earthed switch |
-
2014
- 2014-12-31 CN CN201410854940.7A patent/CN104538238A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1270404A (en) * | 1999-04-12 | 2000-10-18 | 三菱电机株式会社 | Switch |
| JP2008218001A (en) * | 2007-02-28 | 2008-09-18 | Mitsubishi Electric Corp | Electrode arrangement of gas-blast load-break switch |
| JP2011096474A (en) * | 2009-10-29 | 2011-05-12 | Toshiba Corp | Vacuum valve |
| CN103843097A (en) * | 2011-09-28 | 2014-06-04 | 伊顿公司 | Vacuum switch and hybrid switch assembly therefor |
| WO2014094724A1 (en) * | 2012-12-19 | 2014-06-26 | Kuckuck Jochen | Contact system for compensating arc contraction in power switches |
| CN103971981A (en) * | 2013-01-28 | 2014-08-06 | 株式会社日立制作所 | Gas-insulated switching device |
| CN204390967U (en) * | 2014-12-31 | 2015-06-10 | 北京双杰电气股份有限公司 | Earthed switch contact and there is its direct acting plug-in type earthed switch |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150422 |
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| RJ01 | Rejection of invention patent application after publication |