CN104766728A - Electric arc erosion resisting switch - Google Patents
Electric arc erosion resisting switch Download PDFInfo
- Publication number
- CN104766728A CN104766728A CN201510212807.6A CN201510212807A CN104766728A CN 104766728 A CN104766728 A CN 104766728A CN 201510212807 A CN201510212807 A CN 201510212807A CN 104766728 A CN104766728 A CN 104766728A
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- Prior art keywords
- contact
- contact site
- alloy
- site
- switch
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
- H01H1/021—Composite material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/56—Contact arrangements for providing make-before-break operation, e.g. for on-load tap-changing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Contacts (AREA)
Abstract
The invention relates to the field of switches, in particular to an electric arc rotation resisting switch. The electric arc erosion resisting switch comprises a first contact portion and a second contact portion. The first contact portion and the second contact portion are in sliding contact with each other. One end of the first contact portion is provided with a first alloy contact. One end of the second contact portion is provided with a second alloy contact. When the first contact portion is not in contact with the second contact portion, the first alloy contact is opposite to the second alloy contact. When the first contact portion is in contact with the second contact portion, the first alloy contact and the second alloy contact are arranged with the back towards each other. According to the electric arc rotation resisting switch, the two contact portions of the switch are provided with the alloy contacts respectively, after the two contact portions are in contact with each other and then separated, because the resistance of the alloy contacts is large, the discharging effect of the contact portions is lowered, and the probability of an arc discharging phenomenon is reduced; because the alloy contacts are resistant to erosion, the erosion, caused by an electric arc, of the contacts is reduced, the surfaces of the two contact portions of the on-load switch are protected, the stability of contact is guaranteed, and the service life of the switch is prolonged.
Description
Technical field
The present invention relates to field of switches, in particular to a kind of arc resistant ablation switch.
Background technology
Switch often need cut-off big current, therefore its contact easily ablation gradually from separated point, and finally because contact ablation seriously makes its contact-making surface reduce and heating burnout gradually, the present invention is for load switch of transformer.On-load tap-changer of transformer a kind ofly provides the switching device of constant voltage when load variations for transformer.Its general principle be exactly when ensure not interrupt load electric current, realize the switching in Transformer Winding between tap, thus change the number of turn of winding, i.e. the voltage ratio of transformer, finally realizes the object of pressure regulation.The loaded capacity-regulated switch of transformer, be a kind of along with load variations, transformer changes self capacity by it, thus a kind of switching device of wastage reducing and energy saving.Its general principle be when ensure not interrupt load electric current, realize high-low pressure winding star triangle conversion or connection in series-parallel conversion.Above-mentioned switch is all because being with idling to change, and its high and low pressure side electric current of jumbo equipment is also large, particularly low-pressure side.
In power transmission and transformation industry now, high-power transformer has installed on-load voltage regulating switch all widely, and it plays an important role to the quality of voltage of guarantee system and user.Current developed country has mostly installed loaded switch to capacity at 10MVA and above transformer, and much more more and more China's electric power system and user also have employed on-load tap-changing transformer.And loaded switch is its most critical, most expensive components, therefore, how can increase the useful life of loaded switch, reduce the spoilage of loaded switch, be a problem being worth research.Loaded capacity-regulated switch is a kind of energy-conserving product that the cooperation transformer starting in recent years to promote gradually realizes self capacity transfer.
The loaded switch used in the prior art is in the process of folding, the two ends of loaded switch can be made to produce electric arc when distance certain intervals, namely there is phenomenon of arc discharge, and then can destroy loaded switch due to the high pressure of electric arc and high electric current, the contact surface of loaded switch is made to produce more spot, cause loaded switch loose contact, have impact on the useful life of loaded switch greatly.
Summary of the invention
The object of the present invention is to provide a kind of arc resistant ablation loaded switch, to solve the above problems.
Provide a kind of arc resistant ablation loaded switch in an embodiment of the present invention, comprise the first contact site, the second contact site;
Described first contact site and described second contact site sliding contact;
One end of described first contact site is provided with the first alloy contact;
One end of described second contact site is provided with the second alloy contact;
When described first contact site does not contact with described second contact site, described first alloy contact and described second alloy contact are oppositely arranged;
When described first contact site contacts with described second contact site, described first alloy contact and the opposing setting of described second alloy contact.
Further, the material of described first alloy contact and described second alloy contact is copper-tungsten.
Further, described first alloy contact covers the end arranging whole described first contact site;
Described second alloy contact covers the end arranging whole described second contact site.
Further, the cross section of described first alloy contact and described second alloy contact is semicircle shape.
Further, the two ends of described first contact site are provided with the first alloy contact;
Described second contact site is two and is arranged in series.
Further, described second alloy contact on two described second contact sites is oppositely arranged.
Further, described first contact site and described second contact site are two;
Described first alloy contact on two described first contact sites is oppositely arranged;
The opposing setting of described second alloy contact on two described second contact sites.
Further, described first contact site is two;
Described second contact site is four;
Four described second contact sites are arranged in series between two.
Further, described first contact site and described second contact site are the setting of straight line, semi-ring or ring-type;
Described second contact site is the twice of described first contact site quantity;
The two ends of described first contact site and described second contact site are provided with the second alloy contact.
Further, the material of described first contact site and described second contact site is copper.
Arc resistant ablation loaded switch provided by the invention; two contact sites of switch all arrange alloy contact; after separating before and after two contact site contacts; reduce its discharge effect because alloy contact resistance is large, reduce the generation of phenomenon of arc discharge, because the resistance to ablation of alloy contact; reduce electric arc to the ablation of contact; protect the surface of two contact sites on loaded switch, ensure that the stability of contact, and then improve the useful life of switch.
Accompanying drawing explanation
In order to be illustrated more clearly in the specific embodiment of the invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the open mode of arc resistant ablation switch of the present invention;
Fig. 2 is the structural representation of the closure state of arc resistant ablation switch of the present invention;
Fig. 3 is the structural representation of the normally off of arc resistant ablation switch of the present invention;
Fig. 4 is the another kind of structural representation of the normally off of arc resistant ablation switch of the present invention;
Normally off structural representation when Fig. 5 is multiple series connection of arc resistant ablation switch of the present invention;
Normally open structural representation when Fig. 6 is multiple series connection of arc resistant ablation switch of the present invention;
Fig. 7 is that the annular of arc resistant ablation switch of the present invention arranges structural representation;
Fig. 8 is the another kind of structural representation that the annular of arc resistant ablation switch of the present invention is arranged.
Reference numeral:
1: the second contact site 2: the second alloy contact 3: the first alloy contact
4: the first contact sites
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, carry out clear, complete description by technical scheme of the present invention below.Obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, other embodiments all that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belong to the scope that the present invention protects.
In describing the invention, it should be noted that, orientation or the position relationship of the instruction such as term " " center ", " on ", D score, "left", "right", " vertically ", " level ", " interior ", " outward " they be based on orientation shown in the drawings or position relationship; be only the present invention for convenience of description and simplified characterization; instead of instruction or imply the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.In addition, term " first ", " second ", " the 3rd " only for describing object, and can not be interpreted as instruction or hint relative importance.
In describing the invention, also it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
As shown in Figures 1 to 6, the invention provides a kind of arc resistant ablation switch, comprise the first contact site 4, second contact site 1;
Described first contact site 4 and described second contact site 1 sliding contact;
One end of described first contact site 4 is provided with the first alloy contact 3;
One end of described second contact site 1 is provided with the second alloy contact 2;
When described first contact site 4 does not contact with described second contact site 1, described first alloy contact 3 is oppositely arranged with described second alloy contact 2;
When described first contact site 4 contacts with described second contact site 1, described first alloy contact 3 and the opposing setting of described second alloy contact 2.
Be the form of slide switch when loaded switch uses in low pressure, therefore, the first contact site 4 and the second contact site 1 carry out sliding contact, make both progressively contact by slide the first contact site 4 or the second contact site 1.
In the present embodiment, the first contact site 4 is for being fixedly installed, and the second contact site 1 is slipper.When loaded switch is opened, the first contact site 4 does not contact with the second contact site 1; When needs close loaded switch, slided by the second contact site 1 to the first contact site 4, now, the first alloy contact 3 and described second alloy contact 2 relative motion, effectively can avoid the generation of phenomenon of arc discharge; After the first contact site 4 and the second contact site 1 start to contact, loaded switch closes, and continues slip second contact site 1 and makes loaded switch completely closed, forms stable contact, avoids the slip by a small margin of the second contact site 1 and cause contact to be lost efficacy.
Now, the first contact site 4 is connected in circuit with the second contact site 1, when the first contact site 4 contacts, and closing of circuit.
Be preferred embodiment that described first alloy contact 3 is copper-tungsten with the material of described second alloy contact 2.
Tungsten-copper alloy combines the advantage of tungsten and copper, wherein tungsten fusing point high (tungsten fusing point is 3410 DEG C, the fusing point of copper 1080 DEG C), and density is large, and (tungsten density is 19.34g/cm
3, the density of copper is 8.89g/cm
3); Copper electrical and thermal conductivity performance is superior, and microstructure is even, high temperature resistant, intensity is high, arc ablation resistance, density are large for tungsten-copper alloy (composition general range is WCu7 ~ WCu50); Conduction, heat conductivility are moderate.
The material of the first alloy contact 3 and the second alloy contact 2 is set to the words of copper-tungsten, the first alloy contact 3 and the second alloy contact 2 can be made to be provided with high-melting-point and the superior advantage of electrical and thermal conductivity performance all simultaneously, only can prevent the phenomenon of arcing, effectively can realize anti-yaw damper again, and its conductive effect can not be affected.
Be preferred embodiment that described first alloy contact 3 covers the end arranging whole described first contact site 4;
Described second alloy contact 2 covers the end arranging whole described second contact site 1.
The end of the first contact site 4 all covers by the first alloy contact 3, is that the top corner portion of close second contact site 1 all covers at least; The end of the second contact site 1 all covers by the second alloy contact 2, is that the top corner portion of close first contact site 4 all covers at least.
Such setting, can carry out electric arc to the first contact site 4 of loaded switch and the second contact site 1 when sliding and completely cut off, avoid the possibility producing electric arc at an arbitrary position, and then improve stability in use and the useful life of loaded switch.
Be preferred embodiment that described first alloy contact 3 is semicircle shape with the cross section of described second alloy contact 2.
The diameter of section of semicircle shape is the thickness of the first contact site 4 or the second contact site 1.The first contact site 4 or the second contact site 1 all can not be covered when being less than thickness; When being greater than thickness, the contact stabilization of two contact sites cannot be ensured, the first contact site 4 even likely can be caused cannot to complete with the second contact site 1 and contact, also just cannot complete the closed of loaded switch.
Be preferred embodiment that as shown in Figures 3 to 6, the two ends of described first contact site 4 are provided with the first alloy contact 3;
Described second contact site 1 is two and is arranged in series.
Such loaded switch is by two the second contact site 1 places in circuit, by the closed and disconnected of the first contact site 4 realizing circuit.
When first contact site 4 does not contact with two the second contact sites 1, circuit disconnects; When the two ends of the first contact site 4 contact with two the second contact sites 1 respectively, closing of circuit.
Second contact site 1 under closed state, can not be produced phenomenon of arc discharge, and then make the use of loaded switch more flexible by arranging like this while any direction slip all can realize power-off.
Be preferred embodiment that described second alloy contact 2 on two described second contact sites 1 is oppositely arranged.
As shown in Figure 3, the second alloy contact 2 on two the second contact sites 1 is oppositely arranged, and now, loaded switch is normally off, two the second contact site 1 places in circuit, is communicated with the closed of two the second contact sites 1 and then realizing circuit by the first contact site 4.
The two ends of the first contact site 4 are provided with the first alloy contact 3, the second alloy contact 2 on second contact site 1 is oppositely arranged, by second contact site 1 that slides to any direction, the first contact site 4 can be made only to contact with one of them second contact site 1, and then by circuit breaker.
Be preferred embodiment that described first contact site 4 and described second contact site 1 are two;
Described first alloy contact 3 on two described first contact sites 4 is oppositely arranged;
The opposing setting of described second alloy contact 2 on two described second contact sites 1.
Such connected mode can be by two the first contact sites 4 respectively place in circuit, be communicated with respectively, then be communicated with by two the second contact sites 1 by wire, and then realizing circuit is closed by two the second contact sites 1 with two the first contact sites 4.
Now, the second contact site 1 in circuit slides to any direction and one of them second contact site 1 all can be caused to be separated with the first contact site 4, and then makes circuit breaker.
In circuit disconnection or closed process; first alloy contact 3 and the second alloy contact 2 are oppositely arranged all the time; or relative motion or opposing motion; it can give the first contact site 4 and 1 one the omnibearing protections of the second contact site; effectively avoid the generation of phenomenon of arc discharge, avoid the destruction of electric arc to the first contact site 4 or the second contact site 1.
Be preferred embodiment that described first contact site 4 is two;
Described second contact site 1 is four;
Four described second contact sites 1 are arranged in series between two.
The two ends that the two ends of the first contact site 4 are now provided with the first alloy contact 3, second contact site 1 are provided with the second alloy contact 2, such arranging can realize double slide in the same way the first contact site 4 time realizing circuit disconnect and closed function.
Now by two the first contact site 4 places in circuit, by the guiding of two the second contact sites 1 and connection two the second contact sites 1, two the first contact sites 4 are connected, and then realizing circuit is closed.
Be preferred embodiment that described first contact site 4 and described second contact site 1 are straight line, semi-ring or ring-type and arrange;
Described second contact site 1 is the twice of described first contact site 4 quantity;
The two ends of described first contact site 4 and described second contact site 1 are provided with the second alloy contact 2.
As shown in Figure 7, the two ends of the first contact site 4 are provided with the first alloy contact 3, when again the two ends of the second contact site 1 also all being arranged the second alloy contact 2, can by multiple such device parallel connection or series connection, or by several first contact site 4 and the second contact site 1 all annular arrange, the second contact site 1 can be realized and can to slide continuously the disconnection of realizing circuit and closure function.
Circuit wiring pattern now can be relatively more flexible, and can be access first contact site 4 other end by one end to access the second contact site 1, also can be that the first contact site 4 is all accessed at two ends or the second contact site 1 is all accessed at two ends, it can both form closed circuit.
Further, such arranging can also realize multiple circuit and realize controlling by a switch simultaneously, simple to operation.
Be preferred embodiment that the material of described first contact site 4 and described second contact site 1 is copper.
Copper has good electric conductivity, uses copper as the material of the first contact site 4 and the second contact site 1, effectively can improve the efficiency of conduction.
The material that it is pointed out that the first contact site 4 and the second contact site 1 can be copper, but it is not only confined to use copper, and it can also be other materials, as iron etc., as long as it can have good electric conductivity.
Arc resistant ablation loaded switch provided by the invention; two contact sites of switch all arrange alloy contact; after separating before and after two contact site contacts; reduce its discharge effect because alloy contact resistance is large, reduce the generation of phenomenon of arc discharge, because the resistance to ablation of alloy contact; reduce electric arc to the ablation of contact; protect the surface of two contact sites on loaded switch, ensure that the stability of contact, and then improve the useful life of switch.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. an arc resistant ablation switch, is characterized in that, comprises the first contact site, the second contact site;
Described first contact site and described second contact site sliding contact;
One end of described first contact site is provided with the first alloy contact;
One end of described second contact site is provided with the second alloy contact;
When described first contact site does not contact with described second contact site, described first alloy contact and described second alloy contact are oppositely arranged;
When described first contact site contacts with described second contact site, described first alloy contact and the opposing setting of described second alloy contact.
2. arc resistant ablation switch according to claim 1, is characterized in that, the material of described first alloy contact and described second alloy contact is copper-tungsten.
3. arc resistant ablation switch according to claim 1, is characterized in that, described first alloy contact covers the end arranging whole described first contact site;
Described second alloy contact covers the end arranging whole described second contact site.
4. arc resistant ablation switch according to claim 1, is characterized in that, the cross section of described first alloy contact and described second alloy contact is semicircle shape.
5. arc resistant ablation switch according to claim 1, is characterized in that, the two ends of described first contact site are provided with the first alloy contact;
Described second contact site is two and is arranged in series.
6. arc resistant ablation switch according to claim 5, is characterized in that, described second alloy contact on two described second contact sites is oppositely arranged.
7. arc resistant ablation switch according to claim 5, is characterized in that, described first contact site and described second contact site are two;
Described first alloy contact on two described first contact sites is oppositely arranged;
The opposing setting of described second alloy contact on two described second contact sites.
8. arc resistant ablation switch according to claim 1, is characterized in that, described first contact site is two;
Described second contact site is four;
Four described second contact sites are arranged in series between two.
9. arc resistant ablation switch according to claim 1, is characterized in that, described first contact site and described second contact site are straight line, semi-ring or ring-type and arrange;
Described second contact site is the twice of described first contact site quantity;
The two ends of described first contact site and described second contact site are provided with the second alloy contact.
10. the arc resistant ablation switch according to any one of claim 1-9, is characterized in that, the material of described first contact site and described second contact site is copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510212807.6A CN104766728A (en) | 2015-04-29 | 2015-04-29 | Electric arc erosion resisting switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510212807.6A CN104766728A (en) | 2015-04-29 | 2015-04-29 | Electric arc erosion resisting switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104766728A true CN104766728A (en) | 2015-07-08 |
Family
ID=53648497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510212807.6A Pending CN104766728A (en) | 2015-04-29 | 2015-04-29 | Electric arc erosion resisting switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104766728A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114038717A (en) * | 2021-11-10 | 2022-02-11 | 广东电网有限责任公司 | Current transfer device |
-
2015
- 2015-04-29 CN CN201510212807.6A patent/CN104766728A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114038717A (en) * | 2021-11-10 | 2022-02-11 | 广东电网有限责任公司 | Current transfer device |
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| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150708 |
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| RJ01 | Rejection of invention patent application after publication |