CN112038157A - Isolating switch - Google Patents
Isolating switch Download PDFInfo
- Publication number
- CN112038157A CN112038157A CN202010686187.0A CN202010686187A CN112038157A CN 112038157 A CN112038157 A CN 112038157A CN 202010686187 A CN202010686187 A CN 202010686187A CN 112038157 A CN112038157 A CN 112038157A
- Authority
- CN
- China
- Prior art keywords
- contact
- isolating switch
- switch
- static
- knife
- Prior art date
- 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.)
- Pending
Links
- 230000003068 static effect Effects 0.000 claims abstract description 39
- 229910052573 porcelain Inorganic materials 0.000 claims abstract description 16
- 238000002955 isolation Methods 0.000 claims abstract description 8
- 238000007747 plating Methods 0.000 claims description 13
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 11
- 229910052709 silver Inorganic materials 0.000 claims description 11
- 239000004332 silver Substances 0.000 claims description 11
- 239000012212 insulator Substances 0.000 claims description 9
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 238000005242 forging Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 9
- 238000005299 abrasion Methods 0.000 abstract description 5
- 230000017525 heat dissipation Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/023—Base and stationary contacts mounted thereon
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
A disconnector, comprising: an isolation switch chassis; two groups of support porcelain bottles are respectively arranged at two ends of the isolation switch underframe; two fixed contacts respectively arranged on the two groups of support porcelain bottles, wherein both sides of one end of each fixed contact opposite to each other are provided with a convex part; the contact knife is movably connected with the two fixed contacts; the contact knife is in linear contact with each convex part. According to the embodiment of the invention, the stable installation of the static contacts on two sides can be realized through the isolation switch chassis and the two groups of support porcelain bottles. Through the linear contact of the contact knife and the convex part of each static contact, the friction force between the static contact and the contact knife can be reduced to the greatest extent, so that the abrasion to the static contact is reduced, and the problem that the performance of the isolating switch is reduced easily after the isolating switch is used for a long time is solved. In addition, because the structure of linear contact is adopted, the heat dissipation performance is greatly improved compared with the traditional structure.
Description
Technical Field
The invention belongs to the field of high-voltage power transmission and distribution, and particularly relates to an isolating switch.
Background
The high-current 12-24 kV isolating switch is mainly applied to the outlet end of a transformer substation, and therefore, the isolating switch is in a high-load operation working state for a long time. The fixed contact of the traditional 12-24 KV isolating switch is made of a metal conductor, and then the metal surface is plated. The 12-24 KV isolating switch structure mostly adopts a plate-shaped structure, so that when the isolating switch is switched on and off, the friction force generated when the static contact and the contact switch are switched on and off is larger. After the static contact works for a long time, the surface of the static contact is abraded and the plating layer falls off, so that the performance of the isolating switch is reduced, and the static contact is easy to heat in the running through-flow process.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the isolating switch which is simple in structure and solves the problem of performance reduction of the isolating switch caused by overlarge friction force between a static contact and a contact knife.
According to the embodiment of the invention, the isolating switch comprises: an isolation switch chassis; two groups of support porcelain bottles are respectively arranged at two ends of the isolation switch underframe; two fixed contacts respectively arranged on the two groups of support porcelain bottles, wherein two sides of one end of each fixed contact, which is opposite to the other end, are provided with convex parts; the contact knife is movably connected with the two fixed contacts; the contact knife is in linear contact with each convex part.
The isolating switch provided by the embodiment of the invention at least has the following technical effects: the stable installation of the static contacts on the two sides can be realized through the isolating switch chassis and the two groups of support porcelain bottles. Through the linear contact of the contact knife and the convex part of each static contact, the friction force between the static contact and the contact knife can be reduced to the greatest extent, so that the abrasion to the static contact is reduced, and the problem that the performance of the isolating switch is reduced easily after the isolating switch is used for a long time is solved. In addition, because the structure of linear contact is adopted, the heat dissipation performance is greatly improved compared with the traditional structure.
According to some embodiments of the present invention, the structure of each stationary contact is a T-shaped structure formed by stamping and forging, and the protruding portion is located at a lateral portion of the T-shaped structure.
According to some embodiments of the invention, the protrusions are all in a circular arc configuration.
According to some embodiments of the present invention, the material of the stationary contact is red copper.
According to some embodiments of the present invention, the surface of the stationary contact is plated with a silver plating layer.
According to some embodiments of the invention, the silver plating layer has a thickness of 20 μm.
According to some embodiments of the invention, the silver layer is plated with a tin layer on a surface thereof.
According to some embodiments of the invention, the tin plating layer has a thickness of 12 μm.
According to some embodiments of the present invention, the isolating switch further includes two sets of contact mounting supports respectively disposed on the two sets of support porcelain bottles, and each set of contact mounting supports is used for mounting the static contact.
According to some embodiments of the present invention, the isolating switch further includes an operating insulator disposed on the isolating switch chassis, and the operating insulator is configured to operate the contact switch to perform switching on and off.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a front view of a stationary contact according to an embodiment of the present invention;
fig. 2 is a left side view of a stationary contact according to an embodiment of the present invention;
fig. 3 is a front view (closing state) of the disconnector according to the embodiment of the invention;
fig. 4 is a front view (open state) of the disconnecting switch according to the embodiment of the present invention;
fig. 5 is a top view of a disconnector according to an embodiment of the invention.
Reference numerals:
an isolation switch chassis 100,
A porcelain bottle 200 for supporting,
A static contact 300, a convex part 310,
A contact knife 400,
A contact mounting support 500,
The insulator 600 is operated.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, if there are first, second, third, fourth, etc. described only for the purpose of distinguishing technical features, they are not to be interpreted as indicating or implying relative importance or implying number of indicated technical features or implying precedence of indicated technical features.
In the description of the present invention, unless otherwise explicitly defined, terms such as arrangement, connection and the like should be broadly construed, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the detailed contents of the technical solutions.
A disconnector according to an embodiment of the invention is described below with reference to fig. 1 to 5.
According to the embodiment of the invention, the isolating switch comprises: the isolating switch comprises an isolating switch underframe 100, two groups of support porcelain bottles 200, two static contacts 300 and a contact knife 400. A group of support porcelain bottles 200 are respectively arranged at two ends of the isolation switch underframe 100; each group of porcelain insulator 200 is provided with a static contact 300, and two opposite ends of the two static contacts 300 are provided with convex parts 310; the contact knife 400 is movably connected with the two static contacts 300; contact knives 400 are in linear contact with each boss 310.
Referring to fig. 1 to 5, two side surfaces of one end of the disconnecting switch, where the static contact 300 and the contact blade 400 are closed, are provided with a protrusion 310, and when the static contact 300 and the contact blade 400 of the disconnecting switch are closed, the contact blade 400 and the static contact 300 are in a linear contact due to the protrusion 310. In the linear contact structure, when the disconnecting switch is switched on and off, the contact knife 400 has little abrasion to the static contact 300, and meanwhile, the friction force is also reduced during switching on.
According to the isolating switch of the embodiment of the invention, the stable installation of the static contacts 300 on two sides can be realized through the isolating switch chassis 100 and the two groups of support porcelain bottles 200. Through the linear contact between the contact knife 400 and the convex portion 310 of each static contact 300, the friction force between the static contact 300 and the contact knife 400 can be reduced to the greatest extent, so that the abrasion to the static contact 300 is reduced, and the problem that the performance of the isolating switch is easily reduced after the isolating switch is used for a long time is solved. In addition, because the structure of linear contact is adopted, the heat dissipation performance is greatly improved compared with the traditional structure.
In some embodiments of the present invention, referring to fig. 1 to 5, the structure of each stationary contact 300 is a T-shaped structure formed by stamping and forging, and the protrusion 310 is located at a lateral portion of the T-shaped structure. The T-shaped structure formed by stamping and forging has higher strength compared with the T-shaped structure formed by welding or casting, and is convenient for large-scale production. Referring to fig. 2, the fixed contact 300 has a same protrusion 310 on both sides of one end, and the two protrusions 310 and the main body of the fixed contact 300 form a T-shaped structure. The T-shaped structure can enable the closing process of the isolating switch to be more stable relative to the irregular and asymmetric structures, and meanwhile, the static contact 300 can be stably contacted with the contact knife 400 in the electrifying process of the isolating switch. If the static contact 300 is of an asymmetric structure, the static contact 300 may be in poor contact with the contact blade 400, which may affect the safety of electricity utilization.
In some embodiments of the present invention, referring to fig. 2, the protrusions 310 on both sides of the T-shaped structure are circular arc structures. The top end of the protrusion 310 is configured to be a circular arc structure, so that the contact with the contact blade 400 can be ensured to be smoother, and the abrasion to the static contact 300 itself can be reduced. In addition, compared with other structures, the arc structure is more attractive.
In some embodiments of the present invention, the material of the stationary contact 300 is red copper. The red copper has excellent conductivity, and the conductivity of the isolating switch can be effectively improved.
In some embodiments of the present invention, the surface of the stationary contact 300 is plated with a silver plating layer. After the silver plating, the conductivity of the isolating switch can be further improved.
In some embodiments of the invention, the silver plating layer has a thickness of 20 μm. By adopting the thickness, the improvement of the conductivity can be ensured, and meanwhile, the cost can be effectively reduced due to the relatively over-thick silver coating.
In some embodiments of the invention, the surface of the silver plating is plated with a tin plating. The tin-plated layer can ensure the conductivity of the isolating switch and improve the corrosion resistance of the isolating switch.
In some embodiments of the invention, the tin plating layer has a thickness of 12 μm. By adopting the thickness, the corrosion resistance of the isolating switch can be guaranteed, and in addition, the conductivity cannot be influenced by the over-thick tinning.
In some embodiments of the present invention, referring to fig. 3 to 5, the isolating switch further includes two sets of contact mounting supports 500 respectively disposed on the two sets of supporting porcelain bottles 200, and each set of contact mounting supports 500 is used for mounting a static contact 300. The installation of the static contacts 300 can be better realized through the contact installation support 500, and particularly when there are multiple groups of static contacts 300, the installation of the multiple static contacts 300 can be more orderly through the contact installation support 500, so that the switching-on of the multiple groups of static contacts 300 can be ensured to reach the optimal contact state as far as possible.
In some embodiments of the present invention, referring to fig. 1, 3, and 4, the static contact 300 is provided with a plurality of through holes, a portion of the through holes near the protruding portion 310 is used for implementing the installation with the contact installation support 500, and a portion of the through holes far from the protruding portion 310 is used for connecting with an external device requiring power supply.
In some embodiments of the present invention, referring to fig. 3 and 5, the disconnecting switch further includes an operating insulator 600 disposed on the disconnecting switch chassis 100, and the operating insulator 600 is used for operating the contact blade 400 to perform opening and closing operations. The insulating operator is arranged on the isolating switch underframe 100, so that the situation that the special tool is manually used for switching on the switch can be avoided, and the safety of operators is improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to the embodiments, and those skilled in the art will understand that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A disconnector, comprising:
an isolation switch chassis (100);
two groups of support porcelain bottles (200) respectively arranged at two ends of the isolating switch underframe (100);
two fixed contacts (300) respectively arranged on the two groups of support porcelain bottles (200), wherein two sides of one end of each fixed contact (300) are provided with a convex part (310);
the contact knife (400) is movably connected with the two static contacts (300); the contact knife (400) is in linear contact with each convex part (310).
2. The isolating switch of claim 1, wherein the structure of each stationary contact (300) is a T-shaped structure formed by stamping and forging, and the protrusion (310) is located at a lateral portion of the T-shaped structure.
3. The isolating switch of claim 2, wherein the protrusions (310) are all in the form of circular arcs.
4. The disconnector according to claim 1 or 2, characterized in that the material of the stationary contact (300) is copper.
5. The disconnector according to claim 4, characterized in that the surface of the stationary contact (300) is plated with a silver coating.
6. The disconnector according to claim 5, wherein the silver plating layer has a thickness of 20 μm.
7. The disconnector according to claim 5, wherein a surface of the silver plating layer is plated with a tin plating layer.
8. The disconnector according to claim 7, wherein the tin-plated layer has a thickness of 12 μm.
9. The isolating switch of claim 1, further comprising two sets of contact mounting supports (500) respectively disposed on the two sets of porcelain insulators (200), wherein each set of contact mounting supports (500) is used for mounting the static contact (300).
10. The disconnecting switch according to claim 1, further comprising an operating insulator (600) disposed on the disconnecting switch chassis (100), wherein the operating insulator (600) is used for operating the contact switch (400) to switch on and off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010686187.0A CN112038157A (en) | 2020-07-16 | 2020-07-16 | Isolating switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010686187.0A CN112038157A (en) | 2020-07-16 | 2020-07-16 | Isolating switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112038157A true CN112038157A (en) | 2020-12-04 |
Family
ID=73579375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010686187.0A Pending CN112038157A (en) | 2020-07-16 | 2020-07-16 | Isolating switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112038157A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201038039Y (en) * | 2007-04-17 | 2008-03-19 | 仪征市电瓷电器有限责任公司 | Separation switch transmission device with earthing switch |
| CN101308741A (en) * | 2008-06-27 | 2008-11-19 | 成都通力集团股份有限公司 | Bipolar isolation switch of railway traffic |
| CN108987164A (en) * | 2018-07-27 | 2018-12-11 | 青岛特锐德电气股份有限公司 | Movable touch knife and disconnecting switch |
| CN110137019A (en) * | 2019-06-28 | 2019-08-16 | 瓯越电力科技有限公司 | A kind of movable touch knife device and its disconnecting switch |
-
2020
- 2020-07-16 CN CN202010686187.0A patent/CN112038157A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201038039Y (en) * | 2007-04-17 | 2008-03-19 | 仪征市电瓷电器有限责任公司 | Separation switch transmission device with earthing switch |
| CN101308741A (en) * | 2008-06-27 | 2008-11-19 | 成都通力集团股份有限公司 | Bipolar isolation switch of railway traffic |
| CN108987164A (en) * | 2018-07-27 | 2018-12-11 | 青岛特锐德电气股份有限公司 | Movable touch knife and disconnecting switch |
| CN110137019A (en) * | 2019-06-28 | 2019-08-16 | 瓯越电力科技有限公司 | A kind of movable touch knife device and its disconnecting switch |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201204 |
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| RJ01 | Rejection of invention patent application after publication |