CN114464496A - Large current breaking mechanical switch with annular split petal type movable contact structure combined with arc contact - Google Patents
Large current breaking mechanical switch with annular split petal type movable contact structure combined with arc contact Download PDFInfo
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- CN114464496A CN114464496A CN202210147791.5A CN202210147791A CN114464496A CN 114464496 A CN114464496 A CN 114464496A CN 202210147791 A CN202210147791 A CN 202210147791A CN 114464496 A CN114464496 A CN 114464496A
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- contact
- flow row
- annular
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- row
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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 high-current breaking mechanical switch with an annular split petal type movable contact structure combined with an arc contact, which is provided with an upper through-flow row and a lower through-flow row, wherein both the upper through-flow row and the lower through-flow row are provided with two current leading-out ends, and a metal plate in the middle of the upper through-flow row is integrally connected with and arranged below a metal cylinder; all parts 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 hollow area of the middle ring accommodates the metal cylinder of the upper through-flow row, and an annular gap is reserved between the metal cylinder and the middle ring; the tail end of the metal cylinder of the upper through flow row and the middle hollow circular edge area of the lower through flow row are static contact parts; the movable contact structure is an annular split petal type structure, each petal type structure is fixed on a base below through a supporting component, and the base is connected with an operating mechanism in a cabinet body below through a transmission rod. The invention improves the maintainability of the moving contact, is convenient to find, replace and maintain the damaged sub-module, effectively protects the annular split petal type contact and improves the electrical service life of the moving contact.
Description
Technical Field
The invention is applied to a medium-voltage large-current power supply loop, and particularly relates to a large-current breaking mechanical switch of an annular split petal type movable 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. Especially in the context of high current circuits, the breaking performance of mechanical switches plays an important role in reliably breaking the circuit. In general, when a large circuit is broken by a mechanical switch, the contact is easy to damage due to arcing, and the service life of the contact is also reduced. Therefore, the electrical service life of the breaking contact is prolonged, the reliability of the switch can be improved, and the circuit protection is safer and more effective. Secondly, the switch design also focuses on the economic requirement and reduces the maintenance cost of main parts such as contacts.
Disclosure of Invention
The invention aims to provide a high-current breaking mechanical switch with an optimized contact structure. The integrated contact structure solves the problems that the integrated design of the contact in the prior art has higher processing precision requirement, the contact needs to be integrally replaced and maintained when local ablation occurs, the cost is higher and the like. The invention adds the arc contact, reduces the ablation of the main contact, prolongs the electrical service life, and adopts the annular split petal type moving contact to enhance 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 petal type movable contact structure combined with an arc contact comprises an upper through-current row and a lower through-current row;
the upper and lower through-current rows are both provided with two current leading-out ends, wherein the two current leading-out ends of the upper through-current row and a middle metal plate thereof form an angle of 90 degrees, 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 hollow area of the lower through-flow row contains 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 fixed contact, the edge of the tail end of the metal cylinder of the upper through-flow row is a second fixed contact, and the middle areas of the first fixed contact and the second fixed contact form an annular gap;
the upper and lower through-flow rows are internally provided with cooling water flow passages to carry out water-cooling heat dissipation on the upper and lower through-flow rows, the cooling water flow passages are uniformly and comprehensively arranged, and water-cooling pipelines are arranged outside the upper and lower through-flow rows to communicate the cooling water flow passages;
the movable contact structure is an annular split petal type structure, each petal type structure is independent and is fixed on the base through a supporting component, the base is connected with an operating mechanism in the cabinet body below through a transmission rod, and when the switch needs to be closed, the movable contact structure is translated and filled in the annular gap under the action of external force and is in close contact with the annular gap to communicate the upper through-flow row and the lower through-flow row;
the annular split petal-type structures are uniformly distributed, and gaps are equal; each annular split petal-type structure is narrow at the top and wide at the bottom, a smooth curved surface is arranged above the annular split petal-type structure, the annular split petal-type structure is convenient to be in close contact with the first static contact and the second static contact better, and a plane with a larger size is arranged below the annular split petal-type structure and is connected with the base, so that the annular split petal-type structure is better fixed on the sealing bottom plate;
the arc contact comprises a static arc contact and a moving arc contact and is positioned in the central area of the annular split petal type structure; the static arc contact is connected with the center of the tail end of the metal cylinder of the upper through-flow row, and the moving arc contact is positioned under the static arc contact and in the center area of the supporting component below the petal-shaped structure.
Furthermore, the gap between the movable arc contact and the static arc contact is smaller than the gap between the annular split petal type movable contact and the static contact, so that the effect of protecting the structure of the annular split petal type movable contact is achieved.
Furthermore, 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.
Furthermore, the movable contact, the fixed contact, the arc contact, the first annular insulating support, the second 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 are surrounded together to form an arc extinguish chamber.
Further, the arc extinguish chamber is in a sealed state, and the arc extinguish chamber is vacuumized or filled with SF6Gas, or dry nitrogen gas.
Furthermore, the upper and lower through-current rows, the moving contact and the static contact of the mechanical switch provided by the invention are made of high-conductivity metal materials.
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. The movable contact structure is replaced by an annular split petal type structure, so that the maintainability of the movable contact is improved, damaged submodules are conveniently searched, replaced and maintained, and the 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 petal type moving contact and the static contact, the arcing pressure of the annular split petal type moving contact is relieved before the annular split petal type moving contact is subjected to arcing during breaking, and the effects of protecting the annular split petal type moving contact and prolonging the electrical service life of the contact are achieved.
Drawings
FIG. 1 is a schematic view 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 petal type movable contact structure of the invention.
Detailed Description
Embodiments of the present invention will be described below with reference to the accompanying drawings. It is to be understood that such description is merely illustrative and not intended to limit the scope of the present invention.
As shown in fig. 1 and 2, the mechanical switch provided by the present invention comprises an upper through-flow row and a lower through-flow row, wherein the upper through-flow row 1 has two current leading-out terminals, the two current leading-out terminals of the upper through-flow row are 90 degrees to a middle metal plate of the upper through-flow row, and a metal cylinder is connected below the middle metal plate; the lower through-flow row 2 likewise has two current outlets, the metal sheet of which is parallel to the middle metal sheet of the upper through-flow row 1, and the hollow area of the middle ring accommodates the metal cylinder of the upper through-flow row 1. The cooling water carries out water-cooling heat dissipation on the upper through-flow row 1 and the lower through-flow row 2 through a cooling water flow passage 3, and 4 is a lower cabinet body and is mainly provided with an operating mechanism which is connected with a transmission rod to control a contact movement opening and closing circuit. The upper and lower through-flow rows 1 and 2 are fixed by a first annular insulating support 5, and the lower through-flow row 2 is fixed on the lower cabinet body 4 by a second annular insulating support 6.
The first static contact 7 is positioned at the edge of the annular hollow area in the middle of the lower through-flow row 2 and is annular; the second static contact 8 is the end edge of the metal cylinder below the upper through-flow row 1 and is circular. The middle area of the two static contacts forms an annular gap. When the switch is closed, the annular split petal-type moving contact 9 fills the annular gap and is communicated with the upper and lower through-flow rows 1 and 2. The arc contact is divided into a static arc contact 10 and a moving arc contact 11, 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 under the static arc contact 10 and in the center area of the supporting component below the annular split petal-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 petal-type moving contact 9 and the first and second fixed contacts 7 and 8, and the arcing pressure of the annular split petal-type moving contact 9 is relieved before the arcing during breaking. The annular split petal type moving contact 9, the first and second fixed contacts 7 and 8, the static arc contact 10, the moving arc contact 11, the first and second annular insulating supports 5 and 6, and the sealing bottom plate 14, the upper through-flow row 1 and the lower through-flow row 2 which are tightly connected with the upper cover of the outer frame of the lower cabinet body 4 are jointly surrounded to form an arc extinguish chamber 12. The arc-extinguishing chamber 12 is sealed and vacuumized or filled with SF6Gas, or dry nitrogen gas. An operating mechanism is arranged in the lower cabinet body 4, and the movement of the annular split petal type moving contact 9 is controlled through a transmission rod.
Fig. 3 is a schematic diagram of the external structures of the stationary arcing contact 10, the moving arcing contact 11 and the split annular movable contact 9, wherein the split annular movable contact 9 is in a split modular design, and each independent split annular movable contact has an independent supporting structure. When a single module is in fault or damaged, the whole structure does not need to be replaced, so that the split modular design has good economical efficiency, the contact is convenient to maintain, and the working reliability of the contact is improved. The mass of the annular split petal-type moving contact 9 is mainly determined by the magnitude of the breaking current and the breaking speed, and the space size and the number of the petal-type structures of the annular split petal-type moving contact 9 are mainly designed by the structures of the upper and lower through-flow rows 1 and 2 and the gap between the first and second fixed contacts 7 and 8. The petal-type structures forming the annular split petal-type moving contact 9 are uniformly distributed, and the gaps are equal. Each annular petal-shaped structure is narrow at the top and wide at the bottom, and a smooth curved surface is arranged at the top, so that the annular petal-shaped 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 greater dimensions to ensure better fixing to the sealing bottom 14.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and these examples are only for illustrative purpose 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 devised by those skilled in the art without departing from the scope of the invention, and these 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 petal type movable 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 and lower through-current rows are both provided with two current leading-out ends, wherein the two current leading-out ends of the upper through-current row and a middle metal plate thereof form an angle of 90 degrees, 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 hollow area of the lower through-flow row contains 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 fixed contact, the edge of the tail end of the metal cylinder of the upper through-flow row is a second fixed contact, and the middle areas of the first fixed contact and the second fixed contact form an annular gap;
the upper and lower through-flow rows are internally provided with cooling water flow passages to carry out water-cooling heat dissipation on the upper and lower through-flow rows, the cooling water flow passages are uniformly and comprehensively arranged, and water-cooling pipelines are arranged outside the upper and lower through-flow rows to communicate the cooling water flow passages;
the movable contact structure is an annular split petal type structure, each petal type structure is independent and is fixed on the base through a supporting component, the base is connected with an operating mechanism in the cabinet body below through a transmission rod, and when the switch needs to be closed, the movable contact structure is translated and filled in the annular gap under the action of external force and is in close contact with the annular gap to communicate the upper through-flow row and the lower through-flow row;
the annular split petal-type structures are uniformly distributed, and gaps are equal; each annular split petal-type structure is narrow at the top and wide at the bottom, a smooth curved surface is arranged above the annular split petal-type structure, the annular split petal-type structure is convenient to be in close contact with the first static contact and the second static contact better, and the lower surface connected with the base is a plane with a larger size, so that the annular split petal-type structure is ensured to be fixed on the sealing bottom plate better;
the arc contact comprises a static arc contact and a moving arc contact and is positioned in the central area of the annular split petal type structure; the static arc contact is connected with the center of the tail end of the metal cylinder of the upper through-flow row, and the moving arc contact is positioned under the static arc contact and in the center area of the supporting component below the petal-shaped structure.
2. A high current breaking mechanical switch having an annular split moving contact structure incorporating arcing contacts as claimed in claim 1, wherein:
the gap between the movable arc contact and the static arc contact is smaller than the gap between the annular split petal type movable contact and the static contact, and the effect of protecting the structure of the annular split petal type movable contact is achieved.
3. A high current breaking mechanical switch having an annular split moving contact structure incorporating arcing contacts as claimed in claim 1, wherein: 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 cabinet body below through a second annular insulating support.
4. A high current breaking mechanical switch having an annular split moving contact structure incorporating arcing contacts as claimed in claim 3, wherein: the movable contact, the fixed contact, the arc contact, the first annular insulating support, the second 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 are surrounded together to form an arc extinguishing chamber.
5. A high current breaking mechanical switch having an annular split moving contact structure incorporating arcing contacts as claimed in claim 4 wherein:
the arc-extinguishing chamber is in a sealed state, and the arc-extinguishing chamber is vacuumized or filled with SF6Gas, or dry nitrogen gas.
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 true CN114464496A (en) | 2022-05-10 |
| CN114464496B CN114464496B (en) | 2023-04-25 |
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Family Applications (1)
| 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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114464496B (en) |
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" * |
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| CN114464496B (en) | 2023-04-25 |
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