CN114464496B - Heavy current breaking mechanical switch with annular split flap type moving contact structure - Google Patents
Heavy current breaking mechanical switch with annular split flap type moving contact structure Download PDFInfo
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- CN114464496B CN114464496B CN202210147791.5A CN202210147791A CN114464496B CN 114464496 B CN114464496 B CN 114464496B CN 202210147791 A CN202210147791 A CN 202210147791A CN 114464496 B CN114464496 B CN 114464496B
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- contact
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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
-
- 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
- H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
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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
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention relates to a large-current breaking mechanical switch with an annular split flap type moving contact structure combined with an arc contact, which is provided with an upper through-flow row and a lower through-flow row, wherein the upper through-flow row and the lower through-flow row are respectively provided with two current leading-out ends, a metal plate is arranged in the middle of the upper through-flow row, and a metal cylinder is integrally connected below the upper through-flow row; all the components of the lower through-flow row are positioned on the same plane and are parallel to the middle metal plate of the upper through-flow row, the middle circular ring hollow area accommodates the metal cylinder of the upper through-flow row, and an annular gap is reserved between the upper through-flow row and the metal cylinder; the end position of the upper through-flow row metal cylinder and the hollow circular edge area in the middle of the lower through-flow row are fixed contact parts; the movable contact structure is an annular split type structure, each split type structure is fixed on a base below through a supporting part, and the base is connected with an operating mechanism in a cabinet below through a transmission rod. The invention improves the maintainability of the moving contact, is convenient for searching, replacing and maintaining the damaged sub-module, effectively protects the annular split-type contact and improves the electrical life of the moving contact.
Description
Technical Field
The invention is applied to a medium-voltage heavy-current power supply loop, and particularly relates to a heavy-current breaking mechanical switch of an annular split flap type moving contact structure combined with an arc contact.
Background
And a mechanical switch on-off circuit in the power supply loop ensures the safe and reliable operation of the circuit. Particularly, under the background of a high-current circuit, the breaking performance of the mechanical switch plays an important role in reliably breaking the circuit. In general, when a mechanical switch breaks a large circuit, contacts of the mechanical switch are damaged easily due to arcing, and the service life of the contacts is also reduced. Therefore, the electrical life of the breaking contact is prolonged, the reliability of the switch can be increased, and the circuit protection is safer and more effective. Second, switch designs also focus on economic requirements, reducing major component such as contact maintenance costs.
Disclosure of Invention
The invention aims to provide a high-current breaking mechanical switch with an optimized contact structure. The contact head integrated design device solves the problems that in the prior art, the requirements on machining precision are high, the contact head needs to be replaced and maintained integrally when being subjected to partial ablation, the cost is high and the like. The invention adds the arc contact, reduces the ablation of the main contact, improves the electrical life, and adopts the annular split flap type moving contact to strengthen the flexibility of contact maintenance and improve the working reliability.
The technical scheme of the invention is as follows:
a high-current breaking mechanical switch with an annular split flap type moving contact structure combined with an arc contact comprises an upper through-flow row and a lower through-flow row;
the upper through-flow row and the lower through-flow row are respectively provided with two current leading-out ends, wherein the two current leading-out ends of the upper through-flow row form 90 degrees with the middle metal plate, and a metal cylinder is connected below the middle metal plate;
the lower through-flow row is parallel to the middle metal plate of the upper through-flow row, and the middle circular ring hollow area of the lower through-flow row accommodates the metal cylinder of the upper through-flow row;
the edge area of the middle circular ring hollow area of the lower through-flow row is a first static contact, the tail end edge of the metal cylinder of the upper through-flow row is a second static contact, and the middle areas of the first static contact and the second static contact form an annular gap;
the upper and lower through-flow rows are internally provided with cooling water flow channels for carrying out water-cooling heat dissipation on the upper and lower through-flow rows, the cooling water flow channels are uniformly and comprehensively arranged, and the outer parts of the upper and lower through-flow rows are provided with water cooling pipelines for communicating the cooling water flow channels;
the movable contact structure is an annular split type structure, each split type structure is independent and is fixed on a base through a supporting part, the base is connected with an operating mechanism in a cabinet body below through a transmission rod, and when a switch needs to be closed, the switch translates under the action of external force, fills the annular gap and is in close contact with the annular gap to communicate an upper through-flow row and a lower through-flow row;
each petal type structure of the annular split petal type structure is uniformly distributed, and the gaps are equal; each annular split petal structure is in a shape of narrow upper part and wide lower part, and the upper part is a smooth curved surface, so that the annular split petal structure can be in close contact with the first and second fixed contacts better, and a plane with larger size is arranged below the annular split petal structure connected with the base, so that the annular split petal structure can be fixed on a sealing bottom plate better;
the arc contact comprises a static arc contact and a moving arc contact, which are positioned in the central area of the annular split petal type structure; the static arc contact is connected with the central position of the tail end of the upper through-flow row metal cylinder, and the moving arc contact is positioned right below the static arc contact and is positioned in the central area of the supporting part below the petal-shaped structure.
Further, the gap between the movable arc contact and the static arc contact is smaller than the gap between the annular split-type movable contact and the static contact, and the annular split-type movable contact structure is protected.
Further, the upper through-flow row and the lower through-flow row are fixed through a first annular insulating support, and the lower through-flow row is fixed on a sealing bottom plate of an upper cover of an outer frame of the lower cabinet body through a second annular insulating support.
Further, the movable contact, the fixed contact, the arc contact, the sealing bottom plate on the upper cover of the outer frame of the first annular insulating support, the sealing bottom plate on the upper cover of the outer frame of the lower cabinet body, the upper through-flow row and the lower through-flow row jointly surround to form an arc extinguishing chamber.
Further, the arc-extinguishing chamber is in a sealed state, and the arc-extinguishing chamber is vacuumized or filled with SF 6 Gas, or dry nitrogen.
Furthermore, the mechanical switch provided by the invention adopts the metal materials with high conductivity for the upper and lower through-flow rows and the movable and static contacts.
Compared with the prior art, the invention has the beneficial effects that:
the mechanical switch provided by the invention optimizes the contact structure from the aspects of service life, safety performance and reliability of the contact under the condition of high current passing. The annular split type movable contact structure is used for replacing an integrated movable contact structure, maintainability of the movable contact is improved, damaged sub-modules are convenient to find, replace and maintain, and maintenance cost is controlled. And secondly, an arc contact is additionally arranged, the gap between the movable arc contact and the static arc contact is smaller than the gap between the annular split-type movable contact and the static contact, and the arcing pressure is relieved before the annular split-type movable contact is in arcing during breaking, so that the annular split-type movable contact is protected, and the electrical life of the contact is prolonged.
Drawings
FIG. 1 is a schematic diagram of the outline structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
fig. 3 is a schematic diagram of the outline structure of the arc contact and the annular split flap type moving contact structure of the present invention.
Detailed Description
Embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention.
As shown in fig. 1 and 2, the mechanical switch provided by the invention comprises an upper through-flow row and a lower through-flow row, wherein the upper through-flow row 1 is provided with two current leading-out ends, the two current leading-out ends form 90 degrees with an intermediate metal plate, and the intermediate metal plate is connected with a metal cylinder downwards; the lower current bar 2 likewise has two current outlets, the metal plate of which is parallel to the middle metal plate of the upper current bar 1, and the hollow region of the middle ring accommodates the metal cylinder of the upper current bar 1. The cooling water carries out water-cooling heat dissipation on the upper and lower through-flow rows 1 and 2 through the cooling water flow channel 3, the lower cabinet body is 4, and an operating mechanism is mainly arranged and is connected with a transmission rod to control the contact movement switching circuit. The upper and lower through-flow rows 1, 2 are fixed by a first annular insulating support 5, and the lower through-flow row 2 is fixed on the lower cabinet 4 by a second annular insulating support 6.
The first static contact 7 is positioned at the edge of the hollow area of the middle circular ring of the lower through-flow row 2 and is annular; the second fixed contact 8 is a round end edge of a metal cylinder below the upper through-flow row 1. The middle area of the two static contacts forms an annular gap. Annular split flap type movement when switch is closedThe contact 9 fills the annular gap and communicates the upper and lower through-flow rows 1, 2. The arc contact is divided into a static arc contact 10 and a moving arc contact 11, wherein the static arc contact 10 is connected with the center position of the tail end of the metal cylinder of the upper through-flow row 1, and the moving arc contact 11 is positioned right below the static arc contact 10 and is positioned in the center area of the lower supporting part of the annular split flap type moving contact 9. The gap between the static arc contact 10 and the moving arc contact 11 is smaller than the gap between the annular split flap type moving contact 9 and the first and second static contacts 7 and 8, and the arcing pressure is relieved before the annular split flap type moving contact 9 is arcing during breaking. The annular split flap type moving contact 9, the first fixed contact 7, the second fixed contact 8, the fixed arc contact 10, the moving arc contact 11, the first annular insulating support 5, the second annular insulating support 6, the sealing bottom plate 14 tightly connected to the upper cover of the outer frame of the lower cabinet body 4, the upper through-flow row 1 and the lower through-flow row 2 jointly encircle to form an arc extinguishing chamber 12. Sealing and vacuumizing the arc extinguishing chamber 12 or filling SF 6 Gas, or dry nitrogen. An operating mechanism is arranged in the lower cabinet body 4, and the movement of the annular split flap type moving contact 9 is controlled by a transmission rod.
Fig. 3 is a schematic diagram of the external structures of a static arc contact 10, a moving arc contact 11 and an annular split-type flap-type moving contact 9, wherein the annular split-type flap-type moving contact 9 is in split-type modularized design, and each independent flap-type structure is provided with an independent supporting structure. When a single module is failed or damaged, the whole structure does not need to be replaced, so that the split modular design has good economical efficiency, is convenient for the maintenance of the contacts and improves the working reliability of the contacts. The quality of the annular split flap type moving contact 9 is mainly determined by the breaking current and the breaking speed, and the space size and the number of the flap type structure of the annular split flap type moving contact 9 are mainly designed by the structures of the upper through-flow row 1 and the lower through-flow row 2 and the gap between the first fixed contact 7 and the second fixed contact 8. The split structures forming the annular split type movable contact 9 are uniformly distributed, and the gaps are equal. Each annular flap structure is in a shape of narrow upper part and wide lower part, and the upper part is a smooth curved surface, so that the annular flap structure can be in close contact with the first and second fixed contacts 7 and 8 better; the lower surface 13, which is connected to the base, is a support plane of larger dimensions to ensure a better fixation to the sealing floor 14.
The foregoing is merely a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof. Various alternatives and modifications can be made by those skilled in the art without departing from the scope of the invention, and such alternatives and modifications are intended to fall within the scope of the invention.
Claims (5)
1. A high-current breaking mechanical switch with an annular split flap type moving contact structure combined with an arc contact is characterized in that:
comprises an upper through-flow row and a lower through-flow row;
the upper through-flow row and the lower through-flow row are respectively provided with two current leading-out ends, wherein the two current leading-out ends of the upper through-flow row form 90 degrees with the middle metal plate, and a metal cylinder is connected below the middle metal plate;
the lower through-flow row is parallel to the middle metal plate of the upper through-flow row, and the middle circular ring hollow area of the lower through-flow row accommodates the metal cylinder of the upper through-flow row;
the edge area of the middle circular ring hollow area of the lower through-flow row is a first static contact, the tail end edge of the metal cylinder of the upper through-flow row is a second static contact, and the middle areas of the first static contact and the second static contact form an annular gap;
the upper and lower through-flow rows are internally provided with cooling water flow channels for carrying out water-cooling heat dissipation on the upper and lower through-flow rows, the cooling water flow channels are uniformly and comprehensively arranged, and the outer parts of the upper and lower through-flow rows are provided with water cooling pipelines for communicating the cooling water flow channels;
the movable contact structure is an annular split type structure, each split type structure is independent and is fixed on a base through a supporting part, the base is connected with an operating mechanism in a cabinet body below through a transmission rod, and when a switch needs to be closed, the switch translates under the action of external force, fills the annular gap and is in close contact with the annular gap to communicate an upper through-flow row and a lower through-flow row;
each petal-shaped structure of the annular split petal-shaped structure is uniformly distributed, and the gaps are equal; each annular split petal structure is in a shape of narrow upper part and wide lower part, and the upper part is a smooth curved surface, so that the annular split petal structure can be in close contact with the first and second fixed contacts better, and the lower surface connected with the base is a plane with larger size, so that the annular split petal structure can be fixed on a sealing bottom plate better;
the arc contact comprises a static arc contact and a moving arc contact, which are positioned in the central area of the annular split petal type structure; the static arc contact is connected with the central position of the tail end of the upper through-flow row metal cylinder, and the moving arc contact is positioned right below the static arc contact and is positioned in the central area of the supporting part below the petal-shaped structure.
2. A high current breaking mechanical switch having an annular split flap type moving contact structure incorporating an arcing contact according to claim 1, characterized in that:
the gap between the movable arc contact and the static arc contact is smaller than the gap between the annular split-type movable contact and the first fixed contact and the second fixed contact, and the annular split-type movable contact structure is protected.
3. A high current breaking mechanical switch having an annular split flap type moving contact structure incorporating an arcing contact according to claim 1, characterized in that: the upper through-flow row and the lower through-flow row are fixed through a first annular insulating support, and the lower through-flow row is fixed on a sealing bottom plate of an upper cover of an outer frame of the lower cabinet body through a second annular insulating support.
4. A high current breaking mechanical switch having an annular split flap type moving contact structure incorporating an arcing contact according to claim 3, characterized in that: the movable contact, the first fixed contact, the second fixed contact, the arc contact, the sealing bottom plate on the upper cover of the outer frame of the first and second annular insulating supports and the lower cabinet body, the upper through-flow row and the lower through-flow row jointly surround to form an arc extinguishing chamber.
5. A high current breaking mechanical switch having an annular split flap type moving contact structure incorporating an arcing contact according to claim 4, characterized in that:
the arc-extinguishing chamber is in a sealed state, and is vacuumized or filled with SF 6 Gas, or dry nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210147791.5A CN114464496B (en) | 2022-02-17 | 2022-02-17 | Heavy current breaking mechanical switch with annular split flap type moving contact structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210147791.5A CN114464496B (en) | 2022-02-17 | 2022-02-17 | Heavy current breaking mechanical switch with annular split flap type moving contact structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114464496A CN114464496A (en) | 2022-05-10 |
| CN114464496B true CN114464496B (en) | 2023-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210147791.5A Active CN114464496B (en) | 2022-02-17 | 2022-02-17 | Heavy current breaking mechanical switch with annular split flap type moving contact structure |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819903A (en) * | 2010-04-26 | 2010-09-01 | 南京业基电气设备有限公司 | Dynamic/static contact device of main circuit of load switch |
| CN105702519A (en) * | 2016-04-08 | 2016-06-22 | 首瑞（天津）电气设备有限公司 | Contact module for rotation isolation switch and rotation isolation switch |
-
2022
- 2022-02-17 CN CN202210147791.5A patent/CN114464496B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819903A (en) * | 2010-04-26 | 2010-09-01 | 南京业基电气设备有限公司 | Dynamic/static contact device of main circuit of load switch |
| CN105702519A (en) * | 2016-04-08 | 2016-06-22 | 首瑞（天津）电气设备有限公司 | Contact module for rotation isolation switch and rotation isolation switch |
Non-Patent Citations (1)
| Title |
|---|
| 汤存文 ; 李华 ; 宋执权 ; 胡星光 ; .中国聚变工程实验堆大功率混合直流开关概念设计.强激光与粒子束.2019,(04),59-63. * |
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| Publication number | Publication date |
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| CN114464496A (en) | 2022-05-10 |
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