Double-breaking switch device

Abstract

The invention discloses a double-break switch device, which comprises a three-phase pole structure, and is characterized in that each pole comprises a first vacuum circuit breaker and a second vacuum circuit breaker which are fixedly sealed in the pole and are parallel to each other and stacked; the three-phase electric connectors are respectively arranged at two ends of the three-phase pole structure, two paths of three-phase electric connectors are arranged at one end of the three-phase pole structure, and one path of three-phase electric connector is arranged at the other end of the three-phase pole structure; and the two permanent magnetic mechanisms are also arranged at the other end of the three-phase pole structure, and opening and closing of the first vacuum circuit breaker and the second vacuum circuit breaker are respectively controlled through the two permanent magnetic mechanisms. The switch is applied outdoors to realize two-in and one-out or one-in and two-out switch control, and when the switch is used as a two-in and one-out switch, two paths of power supply and one path of output are included, so that power supply switching of two paths of power supplies is realized; when serving as a one-in and two-out switch, the switch comprises one path of power supply and two paths of output, one device controls two paths of on-off, and through a brand-new structural layout design, the whole structure is compact while the electrical requirements are met.

Description

Technical Field

[0001] This invention relates to the field of power grid switchgear, and more specifically to a double-break switchgear. Background Technology

[0002] Currently, most rural power grids and some urban perimeter power grids in my country are radial overhead networks. Each radial overhead feeder uses a single transformer and a single busbar from a single substation as its power source, and the feeders branch off from the substation in a tree-like distribution. Because current pole-mounted circuit breakers only support simple interruption operations, the prevalent tree-like radial power supply of overhead lines cannot form a closed loop, cannot achieve automation, and has a large impact range during faults, resulting in low power supply reliability. On the one hand, once a power line fails, it is impossible to quickly restore power to important users and loads; on the other hand, two branch lines often require two switching devices for control, increasing the number of devices, operating costs, and the pressure on poles or towers. High-density substations and dual-power single-loop network solutions exist, but these solutions are typically applied to urban power grids. Applying high-density substations and dual-power single-loop network solutions from urban power grids to rural power grids—that is, building new substations and erecting new lines to connect with the existing lines of old substations—incurs significant limitations due to large capital investment, long construction periods, and low economic benefits. Summary of the Invention

[0003] This invention addresses the aforementioned technical problems by providing a double-break switch device, enabling switch control with two inputs and one output, or one input and two outputs. When used as a two-input, one-output switch, it includes two power supplies and one output, allowing for switching between the two power sources. This enables rapid switching to the other power source in case of a fault or maintenance in one power supply, achieving quick power restoration. When used as a one-input, two-output switch, it includes one power supply and two outputs. One output line serves as a sectionalizing switch for the main line, while the other output line acts as a switch (i.e., a watchdog timer) for branch lines. Both lines can also be used simultaneously as branch lines for radial agricultural power grids. This invention utilizes a novel structural layout design between the pole mechanism, electrical connector mechanism, and permanent magnet mechanism, satisfying electrical requirements while maintaining a compact overall structure. This invention reduces pressure on poles or towers, allowing one device to perform the function of two devices, saving on equipment quantity and reducing operating costs. The application of this invention's two-input, one-output or one-input, two-output switch enhances the flexibility of overhead power grid structures.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solutions.

[0005] A double-disconnect switch device, characterized in that it comprises: a three-phase pole mechanism, three-phase electrical connectors, and a permanent magnet mechanism. The three-phase pole mechanism includes three poles, each pole including a first vacuum circuit breaker and a second vacuum circuit breaker disposed within the pole, with stationary contacts and moving contacts installed within the first and second vacuum circuit breakers; the three-phase electrical connectors include three first three-phase electrical connectors, three second three-phase electrical connectors, and three third three-phase electrical connectors; two permanent magnet mechanisms, namely a first permanent magnet mechanism and a second permanent magnet mechanism; the three poles are arranged side by side along a first direction, and each pole has a first end and a second end along a second direction. The first and second vacuum circuit breakers of each pole are parallel to each other and stacked along a third direction. The stationary contacts of the first and second vacuum circuit breakers of each pole are located close to the first end of the pole, and the moving contacts of the first and second vacuum circuit breakers of each pole are located away from each other. The first end of each pole is configured such that the first vacuum circuit breaker and the second vacuum circuit breaker of each pole are electrically connected to the first three-phase electrical connector and the second three-phase electrical connector respectively through their respective stationary contacts. The moving contacts of the first vacuum circuit breaker and the second vacuum circuit breaker of each pole are connected in parallel and electrically connected to the third three-phase electrical connector. The first direction, the second direction, and the third direction are orthogonal to each other. The operating rod of the first permanent magnet mechanism is simultaneously driven and connected to the moving contacts of the first vacuum circuit breakers of the three poles, and is used to control the moving contacts of all the first vacuum circuit breakers to operate simultaneously, so as to realize the simultaneous opening and closing of the three first three-phase electrical connectors and the three third three-phase electrical connectors. The operating rod of the second permanent magnet mechanism is simultaneously driven and connected to the moving contacts of the second vacuum circuit breakers of the three poles, and is used to control the moving contacts of all the second vacuum circuit breakers to operate simultaneously, so as to realize the simultaneous opening and closing of the three second three-phase electrical connectors and the three third three-phase electrical connectors (i.e., opening or closing).

[0006] The first permanent magnet mechanism and the second permanent magnet mechanism are located at the second end of the three-phase pole column mechanism. The first permanent magnet mechanism includes a first permanent magnet operating mechanism and a first drive spindle. The second permanent magnet mechanism includes a second permanent magnet operating mechanism and a second drive spindle. The first permanent magnet operating mechanism is placed along a third direction, and the second permanent magnet operating mechanism is placed along a third direction. The first permanent magnet operating mechanism and the second permanent magnet operating mechanism are arranged side by side along a first direction. The first drive spindle is placed along a first direction, and the second drive spindle is placed along a first direction. The first drive spindle and the second drive spindle are arranged side by side along a third direction. The operating rod of the first permanent magnet operating mechanism is drivenly connected to the first drive spindle, and the operating rod of the second permanent magnet operating mechanism is drivenly connected to the second drive spindle. The first drive spindle is drivenly connected to the moving contacts of all first vacuum circuit breakers, and the second drive spindle is drivenly connected to the moving contacts of all second vacuum circuit breakers.

[0007] The first drive spindle and the second drive spindle are respectively provided with an operating crank arm and a drive crank arm that rotate synchronously and coaxially with the first drive spindle and the second drive spindle; the operating rods of the first permanent magnet operating mechanism and the second permanent magnet operating mechanism are respectively connected to the operating crank arms on the first drive spindle and the second drive spindle; the drive crank arms on the first drive spindle and the second drive spindle are respectively connected to the moving contacts of the first vacuum circuit breaker and the second vacuum circuit breaker.

[0008] In this three-phase pole mechanism, the first and second three-phase electrical connectors serve as the input side for electrical connection to the two power supplies (also known as power sources), and the third three-phase electrical connector serves as the output side for electrical connection to the load; or, the first and second three-phase electrical connectors serve as the output side for electrical connection to the two loads, and the third three-phase electrical connector serves as the input side for electrical connection to the power supply (also known as power source).

[0009] It also includes an interlocking mechanism, which is interlocked with two permanent magnet mechanisms and is used to prevent the first vacuum circuit breaker and the second vacuum circuit breaker from closing simultaneously.

[0010] It also includes two sets of manual tripping mechanisms and two sets of indicating mechanisms. The two sets of manual tripping mechanisms are manually connected to the first permanent magnet mechanism and the second permanent magnet mechanism and are used to trip the first vacuum circuit breaker and the second vacuum circuit breaker. The two sets of indicating mechanisms are used to indicate the opening and closing status of the first vacuum circuit breaker and the second vacuum circuit breaker, respectively. The interlocking mechanism is set on one side of the three-phase pole mechanism along the first direction, and the manual tripping mechanism and the indicating mechanism are set on the other side of the three-phase pole mechanism along the first direction away from the interlocking mechanism.

[0011] The system also includes an interlocking mechanism, which is interlocked with two permanent magnet mechanisms to prevent the first and second vacuum circuit breakers from closing simultaneously. The interlocking mechanism includes an electrical interlocking mechanism and / or a mechanical interlocking mechanism. The electrical interlocking mechanism includes a control circuit configured to perform electrical interlocking control. The mechanical interlocking mechanism includes a first interlocking crank arm assembly connected to the first drive spindle, a second interlocking crank arm assembly connected to the second drive spindle, and an interlocking assembly. When the first vacuum circuit breaker switches between an open and closed state, the first interlocking crank arm assembly switches between a first open position and a first closed position. When the second vacuum circuit breaker switches between an open and closed state, the second interlocking crank arm assembly switches between a second open position and a second closed position. The interlocking assembly is interlocked with both the first and second interlocking crank arm assemblies, such that when one interlocking crank arm assembly is in the closed position, the other interlocking crank arm assembly is confined to the open position.

[0012] The first interlocking crank arm assembly includes a first interlocking crank arm, which is fixed to one end of the first drive spindle, and a first limiting pin is provided at one end of the first interlocking crank arm; the second interlocking crank arm assembly includes a second interlocking crank arm, which is fixed to one end of the second drive spindle, and a second limiting pin is provided at one end of the second interlocking crank arm; the first limiting pin and the second limiting pin are configured to be close to each other when opening and tend to move away from each other when closing; the interlocking assembly includes an interlocking plate, one end of the interlocking plate... A hinge hole is provided, and an oblong hole is provided at the other end of the interlocking plate. The oblong hole has a proximal end near the hinge hole and a distal end away from the hinge hole. One of the first limit pin and the second limit pin passes through the hinge hole, and the other of the first limit pin and the second limit pin passes through the oblong hole. When one of the interlocking crank arm assemblies is in the closed position, the limit pin passing through the oblong hole is limited to the distal end, and the first limit pin and the second limit pin cannot continue to move away from each other. The other interlocking crank arm assembly is limited to the open position.

[0013] It also includes two sets of manual tripping mechanisms, which correspond one-to-one with the two drive spindles. Each set of manual tripping mechanisms includes a tripping shaft and a tripping limit crank arm. The tripping limit crank arm is fixed on the corresponding drive spindle and rotates synchronously and coaxially with the drive spindle. The axis of the tripping shaft is parallel to the axis of the corresponding drive spindle. The tripping shaft can be operably rotated around its axis. A cam surface is provided on the outer circumference of the tripping shaft. The cam surface corresponds to the position of the tripping limit crank arm.

[0014] It also includes two sets of indicating mechanisms, which correspond one-to-one with the two drive spindles and are used to indicate the opening and closing status of the two sets of vacuum circuit breakers. Each set of indicating mechanisms includes an opening / closing indicating crank arm, an opening / closing transition plate, a pointer, and an indicating icon. The opening / closing indicating crank arm is fixed on the corresponding drive spindle and rotates synchronously and coaxially with the drive spindle. One end of the opening / closing transition plate is hinged to the opening / closing indicating crank arm, and the other end of the opening / closing transition plate is driven to the pointer. The pointer has an opening indicating position and a closing indicating position in its direction of movement. The indicating icons include an opening indicating icon and a closing indicating icon that correspond to the opening indicating position and the closing indicating position, respectively.

[0015] Each of the first and second three-phase electrical connectors is equipped with a current transformer and a voltage sensor, and each of the third three-phase electrical connectors is equipped with a voltage sensor. Each pole has a recessed receiving space at its top, where the voltage sensors for the first and third three-phase electrical connectors are housed; each pole has a recessed receiving space at its bottom, where the voltage sensor for the second three-phase electrical connector is housed; and the current transformer is fitted onto both the first and second three-phase electrical connectors.

[0016] This invention discloses a double-break switch device, which addresses the problems of the inability to quickly restore power supply to important users and loads, and the inconvenience of using a single device to control the opening and closing of two branch lines. Through in-depth research and innovative design, the device achieves a two-input, one-output switch, allowing power to important users and loads from two different power supply lines. In the event of a fault in either line, it can automatically switch to the non-faulty main line, improving the reliability of power supply to important users. Furthermore, the double-break switch device also achieves a one-input, two-output switch, allowing power to two different loads from one power supply line. This enables a single device to control the opening and closing of two branch lines, reducing the number of devices required and lowering operating costs.

[0017] The double-break switch device of the present invention may further include an interlocking mechanism, which may be an electrical interlocking mechanism and / or a mechanical interlocking mechanism. In a two-in-one-out switch, two sets of anti-misoperation devices, namely mechanical interlocking and electrical interlocking, are designed between the two power supplies to interlock each other, preventing the two power supplies from closing at the same time and avoiding power cross-circuiting and backflow.

[0018] The double-break switch device of the present invention may further include a manual tripping mechanism for manually tripping the first vacuum circuit breaker and the second vacuum circuit breaker respectively.

[0019] The double-break switchgear of the present invention may further include an indicating mechanism for indicating the opening and closing status of the first vacuum circuit breaker and the second vacuum circuit breaker, respectively. The double-break switchgear of the present invention includes a three-phase pole structure, each pole including a first vacuum circuit breaker and a second vacuum circuit breaker that are parallel to each other and stacked within the pole; three-phase electrical connectors are respectively located at both ends of the three-phase pole structure, wherein two three-phase electrical connectors are located at one end of the three-phase pole structure and one three-phase electrical connector is located at the other end of the three-phase pole structure; two permanent magnet mechanisms are also located at the other end of the three-phase pole structure. The present invention, through a novel structural layout design, meets electrical requirements while achieving a compact overall structure.

[0020] The double-break switchgear of the present invention may further include an interlocking mechanism, a manual tripping mechanism, and an indicating mechanism. The interlocking mechanism is located on one side of the three-phase pole structure, while the manual tripping mechanism and the indicating mechanism are located on the other side of the three-phase pole structure opposite to the interlocking mechanism. As mentioned above, two three-phase electrical connectors are located at one end of the three-phase pole structure, and one three-phase electrical connector and two permanent magnet mechanisms are located at the other end. Therefore, the double-break switchgear is configured with the three-phase pole structure in the middle, and the two three-phase electrical connectors, one three-phase electrical connector and two permanent magnet mechanisms, the interlocking mechanism, the manual tripping mechanism, and the indicating mechanism are located around the three-phase pole structure. The overall structure of the device is compact, and each component can easily achieve its own automatic function, cooperating with each other to achieve switch control without interference.

[0021] The double-break switch device of this invention, when used as a two-in-one-out switch, includes two power supplies and one output, enabling switching between the two power sources. This allows for rapid switching to the other power source in case of a fault or maintenance in one power supply, thus quickly restoring power. When used as a one-in-two-out switch, the device includes one power supply and two outputs. One output line serves as a sectionalizing switch for the main line, while the other output line acts as a switch (i.e., a watchdog timer) for branch lines. Both lines can also be used simultaneously as branch lines for radial agricultural power grids. This invention, through a novel structural layout design between the pole mechanism, electrical connector mechanism, and permanent magnet mechanism, meets electrical requirements while maintaining a compact overall structure. This invention reduces pressure on poles or towers, allowing one device to perform the function of two devices, saving on equipment quantity and reducing operating costs. The application of the two-in-one-out or one-in-two-out switch of this invention enhances the flexibility of overhead power grid structures. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of the double-break switch device of the present invention.

[0023] Figure 2 This is a schematic diagram of the overall double-break switch device of the present invention.

[0024] Figure 3 This is a schematic diagram of a single pole structure of the dual-break switch device of the present invention.

[0025] Figure 4 This is a partial schematic diagram of the double-break switch device of the present invention.

[0026] Figure 5 This is another partial schematic diagram of the double-break switch device of the present invention.

[0027] Figure 6 This is another partial schematic diagram of the double-break switch device of the present invention.

[0028] Figure 7 This is a schematic diagram of the mechanical interlocking mechanism of the double-break switch device of the present invention.

[0029] Figure 8 This is a schematic diagram of the manual tripping mechanism of the double-break switch device of the present invention.

[0030] Figure 9 This is a schematic diagram of the indicating mechanism of the double-disconnect switch device of the present invention.

[0031] Figure 10 A partial schematic diagram of the indicating mechanism of the double-disconnect switch device of the present invention.

[0032] Figure 11 A partial schematic diagram of the manual tripping mechanism of the double-break switch device of the present invention.

[0033] Figure 12 A partial schematic diagram of the manual tripping mechanism of the double-break switch device of the present invention.

[0034] Reference numerals: 10. Pole post; 11. First vacuum circuit breaker; 12. Second vacuum circuit breaker; 13. Insulating tie rod; 21. First three-phase electrical connector; 22. Second three-phase electrical connector; 23. Third three-phase electrical connector; 24. Flange; 25. Sleeve; 31. First permanent magnet mechanism; 311. First permanent magnet operating mechanism; 312. First drive spindle; 32. Second permanent magnet mechanism; 321. Second permanent magnet operating mechanism; 322. Second drive spindle; 33. Operating rod 34. Moving lever; 35. Operating crank arm; 40. Driving crank arm; 41. Mechanical interlocking mechanism; 41. First interlocking crank arm assembly; 411. First interlocking crank arm; 412. First limit pin; 413. First interlocking spring; 414. First interlocking spring guide rod; 415. First interlocking limit rod; 416. First interlocking support plate; 42. Second interlocking crank arm assembly; 421. Second interlocking crank arm; 422. Second limit pin; 423. Second interlocking spring; 424. 425. Second interlocking spring guide rod; 426. Second interlocking limit rod; 43. Second interlocking support plate; 44. Interlocking assembly; 45. Interlocking plate; 46. Hinge hole; 47. Waist-shaped hole; 58. Manual tripping mechanism; 59. Tripping shaft; 50. Cam surface; 51. Tripping limit crank arm; 52. Tripping limit plate; 53. Tripping rocker arm; 54. Tripping spring crank arm; 55. Tripping spring shaft; 56. Tripping spring cap; 57. Tripping spring adjusting plate; 58. 1. Opening spring adjustment hole; 60. Indicating mechanism; 61. Opening / closing indicator crank arm; 62. Opening / closing adapter plate; 621. Waist-shaped hole; 63. Pointer; 630. Pointer shaft; 631. Pointer body; 632. Pointer fork; 64. Indicator icon; 71. Current sensor; 72. Voltage sensor; 80. Housing; 81. Base; 82. Support column; 83. Lifting ring; 84. Support plate; 841. Guide column; 842. Limiting column; 843. Adjusting column. Detailed Implementation

[0035] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] In the description of this invention, it should be understood that if terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0037] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact, or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. Where applicable, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this invention are for illustrative purposes only and do not represent the only possible implementation.

[0041] like Figure 1 As shown, a double-break switch device is characterized by comprising: a three-phase pole mechanism, three-phase electrical connectors, and a permanent magnet mechanism. The three-phase pole mechanism includes three poles 10, each pole 10 including a first vacuum circuit breaker 11 and a second vacuum circuit breaker 12 disposed within the pole 10, with stationary contacts and moving contacts installed within the first vacuum circuit breaker 11 and the second vacuum circuit breaker 12; the three-phase electrical connectors include three first three-phase electrical connectors 21, three second three-phase electrical connectors 22, and three third three-phase electrical connectors 23; two permanent magnet mechanisms, namely a first permanent magnet mechanism 31 and a second permanent magnet mechanism 32; the three poles 10 are arranged side by side along a first direction. The three poles 10 are arranged at a certain distance, and insulating partitions can be provided between the poles to facilitate wiring between the three-phase electrical connectors and the poles, while ensuring insulation between the three poles and the three-phase electrical connectors. Three poles 10 have a first end and a second end along a second direction. The first vacuum circuit breaker 11 and the second vacuum circuit breaker 12 of each pole 10 are parallel to each other and stacked along a third direction. The stationary contacts of the first vacuum circuit breaker 11 and the second vacuum circuit breaker 12 of each pole 10 are located close to the first end of the pole 10, and the moving contacts of the first vacuum circuit breaker 11 and the second vacuum circuit breaker 12 of each pole 10 are located away from the first end of the pole 10. The first vacuum circuit breaker 11 and the second vacuum circuit breaker 12 of each pole 10 are electrically connected to the first three-phase electrical connector 21 and the second three-phase electrical connector 22 respectively through their respective stationary contacts. The moving contacts of the first vacuum circuit breaker 11 and the second vacuum circuit breaker 12 of each pole 10 are connected in parallel and electrically connected to the third three-phase electrical connector 23. The first direction, the second direction, and the third direction are orthogonal to each other (see Appendix). Figure 2The first direction is the XX direction, the second direction is the YY direction, and the third direction is the ZZ direction. In this invention, three poles 10 are arranged side by side along the first direction. The first vacuum circuit breaker 11 and the second vacuum circuit breaker 12 of each pole 10 are parallel to each other and stacked along the third direction. That is to say, while the three poles 10 are arranged side by side, the first vacuum circuit breaker 11 and the second vacuum circuit breaker 12 in each pole 10 are also parallel and stacked. Thus, the two sets of six vacuum circuit breakers can be neatly arranged in the poles and divided into two groups in the third direction. One group corresponds to the first three-phase electrical connector 21 and the third three-phase electrical connector 23, and the other group corresponds to the second three-phase electrical connector 22 and the third three-phase electrical connector 23. The layout is ingenious, the structure is compact, and the wiring is convenient. The operating lever 33 of the first permanent magnet mechanism 31 is simultaneously driven and connected to the moving contacts of the first vacuum circuit breakers 11 of the three poles 10, used to control the simultaneous operation of the moving contacts of all the first vacuum circuit breakers 11. Driven by the operating lever 33, the moving contacts move along the second direction, thereby contacting or separating from the stationary contacts, to achieve simultaneous opening and closing of the three first three-phase electrical terminals 21 and the three third three-phase electrical terminals 23. Similarly, the operating lever 33 of the second permanent magnet mechanism 32 is simultaneously driven and connected to the moving contacts of the second vacuum circuit breakers 12 of the three poles 10, used to control the simultaneous operation of the moving contacts of all the second vacuum circuit breakers 12. Driven by the operating lever 33, the moving contacts move along the second direction, thereby contacting or separating from the stationary contacts, to achieve simultaneous opening and closing of the three second three-phase electrical terminals 22 and the three third three-phase electrical terminals 23. It should be understood that when the first, second, and third directions are orthogonal to each other, the device as a whole has a cuboid-like layout. This layout facilitates design, manufacturing, and installation, and results in the most compact structure. However, due to manufacturing and installation errors, and because the requirements are not strictly limited, the overall device may not be a strictly rectangular parallelepiped layout; that is, the first direction, the second direction, and the third direction may not be strictly orthogonal. Therefore, in some embodiments, the first direction, the second direction, and the third direction are approximately orthogonal to each other, and this embodiment is also a patented implementation.

[0042] like Figure 2As shown in the figure, the overall configuration of the double-break switchgear is illustrated. Flanges 24 and bushings 25 are installed on the three-phase electrical connectors. The three-phase electrical connectors are mounted on the second-direction side plate of the enclosure 80 via flanges 24. The external bushings 25 are bent-straight bushings made of silicone rubber composite epoxy resin. Each group of three-phase electrical connectors includes three connectors, corresponding to phases A, B, and C respectively; all nine connectors in the three groups are equipped with flanges 24 and bushings 25. Multiple lifting rings 83 are provided on the top of the enclosure 80, and a base 81 is provided on the bottom of the enclosure 80 for convenient lifting and securing during transportation and installation. A manual tripping mechanism and an indicating mechanism are provided on the first-direction side plate of the enclosure 80. The tripping rocker arm 54 of the manual tripping mechanism is located on the outside of the enclosure 80, and the pointer 63 and indicator icon 64 of the indicating mechanism are also located on the outside of the enclosure 80. Other components of the manual tripping mechanism and the indicating mechanism are housed inside the enclosure 80, which provides protection for these components. The form of each three-phase electrical connector involved in this invention is not limited to the structure shown in the figure. The structure of each three-phase electrical connector may include contact arms or plug-in heads, etc.

[0043] like Figure 3As shown in the figure, a single pole structure of a double-breaking switchgear is illustrated. The pole 10 is constructed of epoxy resin, and each pole 10 includes a first vacuum circuit breaker 11 and a second vacuum circuit breaker 12 encapsulated within it. Stationary and moving contacts are installed in the vacuum interrupter chambers of the first and second vacuum circuit breakers 11 and 12, respectively, with an insulating pull rod 13 at the moving contact. The first and second vacuum circuit breakers 11 and 12 in each pole 10 are parallel to each other and stacked along a third direction. The vacuum interrupter chambers of the first and second vacuum circuit breakers 11 and 12 are encapsulated at the first end of the same pole along a second direction, and their corresponding insulating pull rods 13 are located at the second end. This design ensures mutual insulation between the first and second vacuum circuit breakers 11 and 12, facilitates smooth opening and closing operations, and results in a compact overall structure. Since the three poles are arranged side-by-side along the first direction, the first vacuum circuit breaker 11 and the second vacuum circuit breaker 12 in the three poles 10 form a 2×3 array layout. Furthermore, each first vacuum circuit breaker 11 or second vacuum circuit breaker 12 corresponds one-to-one with each corresponding electrical connector, resulting in a compact and reasonable structure. This facilitates the fixed connection between components and ensures the required insulation distance between them. It should be understood that due to manufacturing and installation errors, and because of non-strict limitations, it is also a patented implementation where the first vacuum circuit breaker 11 and the second vacuum circuit breaker 12 in each pole 10 are approximately parallel to each other. For example, the angle between the axis of the first vacuum circuit breaker 11 and the axis of the second vacuum circuit breaker 12 is 0-20°. Similarly, the fact that the first vacuum circuit breaker 11 and the second vacuum circuit breaker 12 in each pole 10 are stacked along a third direction does not mean that their projections in the third direction are completely overlapping. For example, when viewed along the third direction, the projections of the first vacuum circuit breaker 11 and the second vacuum circuit breaker 12 in each pole 10 are slightly offset or offset, which is also a patented implementation.

[0044] like Figure 1 , Figure 4-5As shown, in some embodiments, the first permanent magnet mechanism 31 and the second permanent magnet mechanism 32 are located at the second end of the three-phase pole column mechanism. As mentioned above, the two groups of six vacuum circuit breakers can be neatly arranged in the pole column and divided into two groups in the third direction. One group corresponds to the first three-phase electrical connector 21 and the third three-phase electrical connector 23, and the other group corresponds to the second three-phase electrical connector 22 and the third three-phase electrical connector 23. The first permanent magnet mechanism 31 and the second permanent magnet mechanism 32 are located at the second end of the three-phase pole column mechanism. At this time, the permanent magnet mechanism is close to the moving contact of the vacuum circuit breaker. The transmission chain between the operating rod of the permanent magnet mechanism and the moving contact of the vacuum circuit breaker can be set to be shorter, making operation convenient and effective. At the same time, the overall structure is still compact and the transmission between the components is coordinated. The first permanent magnet mechanism 31 includes a first permanent magnet operating mechanism 311 and a first drive spindle 312; the second permanent magnet mechanism 32 includes a second permanent magnet operating mechanism 321 and a second drive spindle 322; the first permanent magnet operating mechanism 311 is placed along a third direction, the second permanent magnet operating mechanism 321 is placed along a third direction, and the first permanent magnet operating mechanism 311 and the second permanent magnet operating mechanism 321 are arranged side by side along a first direction; the first drive spindle 312 is placed along the first direction, and the second drive spindle 322... Placed along a first direction, the first drive spindle 312 and the second drive spindle 322 are arranged side by side along a third direction; the operating rod 33 of the first permanent magnet operating mechanism 311 is driveably connected to the first drive spindle 312, and the operating rod 33 of the second permanent magnet operating mechanism 321 is driveably connected to the second drive spindle 322; the first drive spindle 312 is driveably connected to the moving contacts of all the first vacuum circuit breakers 11, and the second drive spindle 322 is driveably connected to the moving contacts of all the second vacuum circuit breakers 12. It should be understood that both the first permanent magnet operating mechanism 311 and the second permanent magnet operating mechanism 321 include an operating rod 33; see appendix. Figure 5 As shown, there are two operating crank arms 34, which are respectively mounted on the first drive spindle 312 and the second drive spindle 322; there are six drive crank arms 35, which are divided into two groups of three each. One group of three drive crank arms 35 is mounted on the first drive spindle 312, and the other group of three drive crank arms 35 is mounted on the second drive spindle 322.

[0045] like Figure 1As shown in the figure, a three-phase pole mechanism, a three-phase electrical connector mechanism, and a permanent magnet mechanism are illustrated. The pole 10 is fixed to the base 81 by a support column 82. A current sensor 71 and a voltage sensor 72 are installed at the bottom of the pole 10 on the second three-phase electrical connector 22, at the top of the pole 10 on the first three-phase electrical connector 21, and at the top of the pole 10 on the third three-phase electrical connector 23. The current sensor 71 and the voltage sensor 72 are used to monitor the current and voltage of the corresponding electrical connectors. The current sensor 71 and the voltage sensor 72 can also be connected to the control system to transmit the monitored current and voltage data to the control system. The control system determines whether the voltage or current of each phase is abnormal based on the current and voltage data, and then determines whether there are faults such as short circuits or open circuits. Based on this data, the control system controls the permanent magnet mechanism to operate, thereby realizing the opening and closing operations as needed. Each pole has a recessed receiving space at its top, where the voltage sensors for the first and third three-phase electrical connectors are housed; each pole also has a recessed receiving space at its bottom, where the voltage sensor for the second three-phase electrical connector is housed; a current transformer is fitted onto the first and second three-phase electrical connectors. This design facilitates wiring between the poles and each phase connector, provides protection for the current sensor 71 and voltage sensor 72, ensures electrical insulation, and further enhances the compact structure.

[0046] like Figure 4-5As shown, in some embodiments, the first drive spindle 312 and the second drive spindle 322 are each provided with an operating crank arm 34 and a drive crank arm 35 that rotate synchronously and coaxially with the first drive spindle 311 and the second drive spindle 312, respectively; the operating rod 33 of the first permanent magnet operating mechanism 311 and the operating rod 33 of the second permanent magnet operating mechanism 321 are respectively connected to the operating crank arm 34 on the first drive spindle 312 and the operating crank arm 34 on the second drive spindle 322; the drive crank arm 35 on the first drive spindle 312 and the drive crank arm 35 on the second drive spindle 322 are respectively connected to the moving contact of the first vacuum circuit breaker 11 and the moving contact of the second vacuum circuit breaker 12. In some specific embodiments, since each permanent magnet operating mechanism is provided with an operating lever 33, and each operating lever 33 cooperates with a corresponding operating crank arm 34, an operating crank arm 34 is respectively provided on the first drive spindle 312 and the second drive spindle 322. On the other hand, since each of the three pole posts 10 is provided with a first vacuum circuit breaker 11 and a second vacuum circuit breaker 12, and each first vacuum circuit breaker 11 and each second vacuum circuit breaker 12 is provided with a moving contact and a cooperating insulating pull rod 13, three drive crank arms 35 are respectively provided on the first drive spindle 312 and the second drive spindle 322. An oblong groove can be formed on the operating crank arm 34, and a corresponding cylindrical pin can be provided on the operating lever 33, with the cylindrical pin passing through and confined in the oblong groove. An oblong groove can be formed on the drive crank arm 35, and a corresponding cylindrical pin can be provided on the insulating pull rod 13, with the cylindrical pin passing through and confined in the oblong groove. In this way, the first permanent magnet operating mechanism 311 can drive the corresponding operating crank arm 34 to move through the operation of the operating rod 33, which in turn drives the first drive spindle 312 to move, which in turn drives the three drive crank arms 35 on the first drive spindle 312 to move simultaneously, which in turn drives the insulating pull rods 13 and moving contacts of the three first vacuum circuit breakers 11 in the three poles 10 to move simultaneously, thereby realizing the control of the opening and closing between the first three-phase electrical connector 21 and the third three-phase electrical connector 23 by the first permanent magnet operating mechanism 311. Similarly, through the same logic, the second permanent magnet operating mechanism 321 can control the opening and closing between the second three-phase electrical connector 22 and the third three-phase electrical connector 23.

[0047] like Figure 1-2As shown, in some embodiments, the first three-phase connector 21 and the second three-phase connector 22 in the three-phase pole mechanism serve as the input side for electrical connection to two power supplies (also called power sources), and the third three-phase connector 23 in the three-phase pole mechanism serves as the output side for electrical connection to the load. This is a two-in-one-out connection, and the double-break switch device functions as a two-in-one-out switch, enabling power switching between the two power sources. This allows for rapid switching to the other power source when one power source fails, achieving rapid power restoration. Alternatively, the first three-phase connector 21 and the second three-phase connector 22 in the three-phase pole mechanism serve as the output side for electrical connection to two loads, and the third three-phase connector 23 in the three-phase pole mechanism serves as the input side for electrical connection to the power supply (also called power source). This is a one-in-two-out connection, and the double-break switch device functions as a one-in-two-out switch, enabling one device to control the opening and closing of two branch lines, and both branch lines can be easily opened and closed. The double-break switch device of the present invention can implement different access methods as needed to achieve corresponding control functions.

[0048] like Figure 4-7 As shown, in some embodiments, an interlocking mechanism is also included. This interlocking mechanism is interlocked with two permanent magnet mechanisms and is used to prevent the first vacuum circuit breaker 11 and the second vacuum circuit breaker 12 from closing simultaneously. For example, when the double-break switch is used as a two-input, one-output switch, it can be used for automatic switching of two-input, one-output circuit breakers. It can reliably reconfigure the power distribution terminal users, automatically select the main power supply and the backup power supply, and realize automatic switching between the main and backup overhead lines. In the event of a power outage or undervoltage of the main power supply, it automatically switches to the backup power supply to ensure the continuity and reliability of power supply. By setting the interlocking mechanism, power cross-circuiting and backflow are avoided, and the simultaneous closing of two power supplies is prevented.

[0049] like Figure 2 , 4As shown in Figure 9, in some embodiments, two sets of manual tripping mechanisms 50 and two sets of indicating mechanisms 60 are also included. The two sets of manual tripping mechanisms 50 are manually controlled and connected to the first permanent magnet mechanism 31 and the second permanent magnet mechanism 32 respectively, and are used to trip the first vacuum circuit breaker 11 and the second vacuum circuit breaker 12 respectively. The two sets of indicating mechanisms 60 are used to indicate the opening and closing status of the first vacuum circuit breaker 11 and the second vacuum circuit breaker 12 respectively. The interlocking mechanism is set on one side of the three-phase pole mechanism along the first direction, and the two sets of manual tripping mechanisms 50 and the two sets of indicating mechanisms 60 are set on the other side of the three-phase pole mechanism away from the interlocking mechanism along the first direction. The first three-phase electrical connector 21 and the second three-phase electrical connector 22 are located on one side of the second direction (YY direction), and the third three-phase electrical connector 23 is located on the other side of the second direction (YY direction). The interlocking mechanism is located on one side of the first direction (XX direction), and the two sets of manual tripping mechanisms 50 and the two sets of indicating mechanisms 60 are located on the other side of the first direction (XX direction). This forms a structural layout in which the three-phase pole mechanism is in the middle, and the two three-phase electrical connectors, one three-phase electrical connector, two permanent magnet mechanisms, the interlocking mechanism, the two sets of manual tripping mechanisms, and the two sets of indicating mechanisms are located around the three-phase pole mechanism. The overall structure of the device is compact, and each component can easily realize its own automatic function. On the basis of non-interference, they can also cooperate with each other to realize switch control. For opening and closing the circuit breaker via a permanent magnet mechanism, the operation of the drive spindle is controlled by the permanent magnet operating mechanism, making the operation convenient and reliable. For interlocking via an interlocking mechanism, the interlocking mechanism is located at one end of the two drive spindles, making the interlocking operation convenient and reliable. For manual opening and indicating mechanisms, the interlocking mechanism is located at the other end of the two drive spindles, avoiding installation position conflicts when installed on the same side as the interlocking mechanism. It also avoids the manual opening mechanism being too far from the axial midpoint of the drive spindle, which would hinder force transmission, making the manual opening operation convenient and reliable.

[0050] Furthermore, for the manual control connection between the manual tripping mechanism 50 and the permanent magnet mechanism, the operator can rotate the tripping shaft 51 of the manual tripping mechanism 50 through an operating mechanism such as an insulated hook (for example, by hooking the tripping rocker arm of the tripping shaft 51 with the insulated hook and pulling the insulated hook). There are various ways to drive the operating mechanism such as the insulated hook. For example, the operator can directly operate the insulated hook by hand, provided that insulation and other protective measures are taken; or, the operating mechanism can be controlled by other mechanical equipment. All these possible operating connections can be called manual control connections. Any control connection that controls the permanent magnet mechanism through the manual tripping mechanism 50, distinct from the automatic control connection of the control system, can be called a manual control connection.

[0051] like Figure 4-7As shown, in some embodiments, an interlocking mechanism is also included, which is interlocked with two permanent magnet mechanisms and used to prevent the first vacuum circuit breaker 11 and the second vacuum circuit breaker 12 from closing simultaneously; the interlocking mechanism includes an electrical interlocking mechanism and / or a mechanical interlocking mechanism 40; the electrical interlocking mechanism includes a control circuit configured to perform electrical interlocking control; the mechanical interlocking mechanism 40 includes a first interlocking crank arm assembly 41 driven by the first drive spindle 312, a second interlocking crank arm assembly 42 driven by the second drive spindle 322, and an interlocking assembly 43. When the first vacuum circuit breaker 11 switches between the open and closed states, the first interlocking crank arm assembly 41 switches between the first open position and the first closed position; when the second vacuum circuit breaker 12 switches between the open and closed states, the second interlocking crank arm assembly 42 switches between the second open position and the second closed position; the interlocking assembly 43 is interlocked with the first interlocking crank arm assembly 41 and the second interlocking crank arm assembly 42, and this interlocking connection restricts the other interlocking crank arm assembly to the open position when one of the interlocking crank arm assemblies is in the closed position.

[0052] like Figure 4-7 As shown, in some embodiments, the first interlocking crank arm assembly 41 includes a first interlocking crank arm 411, which is fixed to one end of the first drive spindle 312, and a first limiting pin 412 is provided at one end of the first interlocking crank arm 411; the second interlocking crank arm assembly 42 includes a second interlocking crank arm 421, which is fixed to one end of the second drive spindle 322, and a second limiting pin 422 is provided at one end of the second interlocking crank arm 421; the first limiting pin 412 and the second limiting pin 422 are configured When the circuit is open, the components tend to move closer together; when closed, they tend to move further apart. The interlocking assembly 43 includes an interlocking plate 431. One end of the interlocking plate 431 has a hinge hole 432, and the other end has an oblong hole 433. The oblong hole 433 has a proximal end near the hinge hole 432 and a distal end away from the hinge hole 432. One of the first limiting pin 412 and the second limiting pin 422 passes through the hinge hole 432, and the other of the first limiting pin 412 and the second limiting pin 422 passes through the oblong hole 433. (See attached diagram) Figure 7 One installation method is shown, where the first limiting pin 412 passes through the hinge hole 432, and the second limiting pin 422 passes through the oblong hole 433. When one of the interlocking crank arm assemblies is in the closed position, the limiting pin in the oblong hole 433 is limited to the far end, and the first limiting pin 412 and the second limiting pin 422 cannot continue to move away from each other, thus limiting the other interlocking crank arm assembly to the open position. It should be understood that the interlocking plate 431 of the interlocking assembly 43 can also be distinguished from the attached... Figure 7Alternatively, the second limiting pin 422 is installed in the hinge hole 432, and the first limiting pin 412 is installed in the oblong hole 433. In this case, the interlocking assembly 43 can play the same interlocking role.

[0053] like Figure 7 As shown, furthermore, the first limit pin 412 and the second limit pin 422 are configured to be close to each other when the switch is opened. Figure 7 From the perspective of observation, when the first drive spindle 312 is opened, the first interlocking crank arm 411 rotates counterclockwise, and the first limit pin 412 moves downward and approaches the second limit pin 422; or, when the second drive spindle 322 is opened, the second interlocking crank arm 421 rotates counterclockwise, and the second limit pin 422 moves upward and approaches the first limit pin 412.

[0054] like Figure 4-7 As shown, in some embodiments and under certain circumstances, the first drive spindle 312 is in the open state, and the second drive spindle 322 is in the closed state. (See attached diagram.) Figure 7 Taking the example of the second drive shaft 322, in this specific embodiment, the second limit pin 422 is connected to the oblong hole 433. When the second drive shaft 322 switches from the open state to the closed state, the second interlocking crank arm 421 rotates clockwise synchronously with the second drive shaft 322 (see attached figure). Figure 7 From the perspective of observation, the second limit pin 422 moves from the proximal end to the distal end in the oblong hole 433. When the second drive spindle 322 is in the closed state, the second limit pin 422 abuts against the distal end. At this time, the first drive spindle 312 is in the open state. Since the length of the interlocking plate 431 is fixed, the first limit pin 412 cannot move away from the second limit pin 422, which means that the first interlocking crank arm 411 cannot rotate around the axis of the first drive spindle 312. The first interlocking crank arm 411 is fixedly connected to the first drive spindle 312, making it impossible for the first drive spindle 312 to rotate. That is, when the second drive spindle 322 is in the closed state, the first drive spindle 312 is restricted to the open state and cannot switch to the closed state.

[0055] like Figure 4-7 As shown, in some embodiments, in other cases, the first drive spindle 312 is in the open state, and the second drive spindle 322 switches from the closed state to the open state. Since the second limit pin 422 abuts against the distal end of the oblong hole 433, the second limit pin 4222 can move from the distal end to the proximal end within the oblong hole 433. This means that the second interlocking crank arm 421 can rotate counterclockwise synchronously with the second drive spindle 322 (to accommodate...). Figure 7 From the perspective of observation in the middle, at this time the second drive spindle 322 rotates counterclockwise (as shown in the attached image). Figure 7From the perspective of observation (as seen in the image), the second drive spindle 322 can be switched from the closed state to the open state without obstruction. When the second drive spindle 322 switches from the closed state to the open state, it rotates counterclockwise, causing the second interlocking crank arm 421 to rotate counterclockwise, which in turn causes the second limit pin 4222 to move from the far end to the near end in the oblong hole 433. After the second drive spindle 322 is open, the second limit pin 422 abuts against the near end of the oblong hole 433. Thus, the first drive spindle 312 is in the open state, and the second drive spindle 322 switches from the closed state to the open state.

[0056] like Figure 4-7 As shown, in some embodiments, in other cases, both the first drive spindle 312 and the second drive spindle 322 are in the open state. In this case, either the first drive spindle 312 or the second drive spindle 322 can be switched from the open state to the closed state. For example, when the first drive spindle 312 switches from the open state to the closed state, the first drive spindle 312 rotates clockwise, causing the first interlocking crank arm 411 to rotate clockwise. The first limit pin 412 causes the interlocking plate 431 to move upward. The second limit pin 422 can move from the proximal end to the distal end in the oblong hole 433. When the first drive spindle 312 is in the closed state, the second drive spindle 322 is restricted to the open state and cannot switch to the closed state.

[0057] like Figure 7 As shown, furthermore, the first limit pin 412 and the second limit pin 422 are configured to tend to move away from each other when the circuit is closed. (See attached diagram) Figure 7 From the perspective of observation, when the first drive spindle 312 is closed, the first interlocking crank arm 411 rotates clockwise, and the first limit pin 412 moves upward and tends to move away from the second limit pin 422; or, when the second drive spindle 322 is closed, the second interlocking crank arm 421 rotates clockwise, and the second limit pin 422 moves downward and tends to move away from the first limit pin 412. The reason it is described as having a tendency to move away from each other is that, in practice, the interlocking component 43 interlocks and limits the first limit pin 412 and the second limit pin 422. Only when both the first limit pin 412 and the second limit pin 422 are in the open state can one of them successfully move away from the other and reach the closed position. At this time, even if the permanent magnet mechanism corresponding to the other one is activated, the corresponding closing operation force is transmitted to the other one and makes it have a tendency to move away. However, since the closing operation force cannot overcome the interlocking limit of the interlocking component 43, the other one only has a tendency to move away and cannot actually move in the direction of moving away.

[0058] As can be seen from the above, the interlocking mechanism can ensure that both the first drive spindle 312 and the second drive spindle 322 are in the open state, or that one of the first drive spindle 312 and the second drive spindle 322 is in the closed state, but avoids the first drive spindle 312 and the second drive spindle 322 being in the closed state at the same time, thereby avoiding the simultaneous closing of the two power supplies and thus avoiding power supply cross-circuiting and backflow.

[0059] like Figure 4-7 As shown, in some embodiments, the first interlocking crank arm assembly 41 further includes a first interlocking spring 413, a first interlocking spring guide rod 414, and a first interlocking limiting rod 415; one end of the first interlocking spring guide rod 414 is hinged to the other end of the first interlocking crank arm 411 away from the first limiting pin 412, and the other end of the first interlocking spring guide rod 414 passes through the first interlocking limiting rod 415; the first interlocking limiting rod 415 is fixed to the mounting plate inside the housing 80; the first interlocking spring 413 is sleeved on the first interlocking spring guide rod 414, one end of the first interlocking spring 413 is fixed to the first interlocking spring guide rod 414, and the other end of the first interlocking spring 413 is fixed to the first interlocking limiting rod 415. The second interlocking crank arm assembly 42 further includes a second interlocking spring 423, a second interlocking spring guide rod 424, and a second interlocking limiting rod 425, the structure and installation method of which are the same as those of the first interlocking crank arm assembly 41. The first interlocking spring 413 and the second interlocking spring 423 are used to provide the elastic reset force for opening the circuit breaker. That is, when the first drive spindle 312 or the second drive spindle 322 is in the open state, the first interlocking spring 413 and the second interlocking spring 423 are in the original state; when one of the first drive spindle 312 and the second drive spindle 322 is in the closed state, the corresponding one of the first interlocking spring 413 and the second interlocking spring 423 is in the compressed state.

[0060] like Figure 4-7 As shown, in some embodiments, the first interlocking limiting rod 415 is fixed by a first interlocking support plate 416, which is a U-shaped plate. Both ends of the first interlocking limiting rod 415 are fixed to the side plates of the U-shaped plate, and the first interlocking support plate 416 is fixed to a mounting plate inside the housing 80 via the bottom plate of the U-shaped plate. The second interlocking crank arm assembly 42 also includes a second interlocking support plate 426, whose structure and installation method are the same as the first interlocking crank arm assembly 41.

[0061] like Figure 4-5As shown in Figures 8-9, in some embodiments, two sets of manual tripping mechanisms 50 are further included. These two sets of manual tripping mechanisms 50 correspond one-to-one with the first drive spindle 312 and the second drive spindle 322, respectively. Each set of manual tripping mechanisms 50 includes a tripping shaft 51 and a tripping limit arm 52. The tripping limit arm 52 is fixed to the corresponding drive spindle and rotates synchronously and coaxially with it. The axis of the tripping shaft 51 is parallel to the axis of the corresponding drive spindle, and the tripping shaft 51 can be operably rotated around its axis. A cam surface 511 is provided on the outer periphery of the tripping shaft 51; the cam surface 511 corresponds to the position of the tripping limit arm 52. By setting the manual tripping mechanism 50, the circuit connection can be manually tripped and disconnected under certain special circumstances (such as permanent magnet mechanism failure, control system failure, etc.).

[0062] like Figure 4-5 As shown in Figures 8-9, in some embodiments, the manual tripping mechanism 50 further includes a tripping rocker arm 54, which is coaxially and fixedly connected to the tripping shaft 51. Specifically, during manual tripping operation, an insulating hook is used to pull the tripping rocker arm 54 (the insulating hook hooks onto the tripping pull ring on the tripping rocker arm 54). After being pulled, the tripping rocker arm 54 rotates, causing the tripping shaft 51 to rotate. The rotation of the tripping shaft 51 causes the cam surface 511 to rotate. The cam surface 511 abuts against and applies force to the tripping limit crank arm 52, causing the tripping limit crank arm 52 to rotate. The tripping limit crank arm 52 drives the drive spindle to rotate, thereby realizing the manual tripping operation.

[0063] like Figure 11As shown, in some embodiments, the manual tripping mechanism 50 further includes a tripping limit plate 53, which is fixed to the support plate 84. The tripping limit plate 53 is used to limit the tripping limit crank arm 52 when the circuit is tripped. After tripping, the tripping limit crank arm 52 abuts against the tripping limit plate 53. By setting the tripping limit plate 53, the rotation range of the tripping limit crank arm 52 is ensured, so that the rotation range of the tripping limit crank arm 52 is adapted to the rotation range of the drive spindle and the movement range of the indicating mechanism. Furthermore, a limit bolt is also provided on the trip limit plate 53. The limit bolt is threaded onto the trip limit plate 53, with the head of the limit bolt facing the trip limit crank arm 52. The installation position of the limit bolt on the trip limit plate 53 is adjustable. By turning the limit bolt, the installation position of the limit bolt can be adjusted, thereby adjusting the distance between the head of the limit bolt and the trip limit crank arm 52, that is, adjusting the rotation range of the trip limit crank arm 52. This allows technicians to make adjustments according to the actual situation. In some alternative embodiments, the tripping limit plate 53 is an L-shaped plate mounted on the support plate 84, having one side that fits against the support plate 84 and another side that faces the tripping limit crank arm 52 at an angle to it. A strip-shaped hole is provided on the side that fits against the support plate 84, and the mounting plate 84 is provided with a corresponding mounting hole. The tripping limit plate 53 is mounted on the support plate 84 by bolts passing through the strip-shaped hole and the mounting hole. At the same time, the tripping limit plate 53 uses a strip-shaped hole, and the installation position of the tripping limit plate 53 can be adjusted, thereby adjusting the distance between the other side of the tripping limit plate 53 and the tripping limit crank arm 52, that is, adjusting the rotation range of the tripping limit crank arm 52, which facilitates the technicians to make adjustments according to the actual situation.

[0064] like Figure 12 As shown, in some embodiments, the manual tripping mechanism 50 further includes a tripping spring assembly for holding the tripping shaft 51 in a reset or locked state. The tripping spring assembly includes a tripping spring crank arm 55, a tripping spring shaft 56, a tripping spring (not shown), and a tripping spring adjusting plate 58. The tripping spring crank arm 55 is coaxially and fixedly connected to the tripping shaft 51. One end of the tripping spring crank arm 55, away from the tripping shaft 51, is hinged to one end of the tripping spring shaft 56. The other end of the tripping spring shaft 56 passes through a through hole in the tripping spring adjusting plate 58. The tripping spring (not shown) is sleeved on the tripping spring shaft 56, with one end of the tripping spring (not shown) abutting against one end of the tripping spring shaft 56, and the other end of the tripping spring (not shown) abutting against the tripping spring adjusting plate 58.

[0065] When the manual tripping mechanism 50 is in the reset state (corresponding to the drive spindle being in the closed state), the tripping spring crank arms 55 are in the closed position, and the distance between the hinge point of the tripping spring crank arm 55 and the tripping spring shaft 56 and the tripping spring adjusting plate 58 is at its maximum. At this time, the tripping spring on the tripping spring shaft 56 is in the initial state or a slightly compressed state. When the manual tripping mechanism 50 is operated to trip, the tripping spring crank arm 55 is operated to rotate. During its rotation, the distance between the hinge point of the tripping spring crank arm 55 and the tripping spring shaft 56 and the tripping spring adjusting plate 58 gradually decreases, and the compressive force on the tripping spring on the tripping spring shaft 56 gradually increases. When this distance reaches its minimum, the tripping spring crank arm 55 and the tripping spring shaft 56 are collinear (called the center line), and the compressive force on the tripping spring on the tripping spring shaft 56 is at its maximum. As the spring crank arm 55 continues to rotate after crossing the center line, the distance gradually increases, and the compressive force on the trip spring gradually decreases. When the manual trip mechanism 50 completes the tripping, the manual trip mechanism 50 is in the locked state (corresponding to the drive spindle being in the tripping state), the trip spring crank arm 55 is in the tripping position, and the distance between the hinge point of the trip spring crank arm 55 and the trip spring shaft 56 and the trip spring adjusting plate 58 is the maximum. At this time, the trip spring on the trip spring shaft 56 is in the initial state or slightly compressed state.

[0066] like Figure 12 As shown, in some embodiments, a limit post 842 is fixed on the support plate 84. The limit post 842 is located on both sides of the trip spring crank arm 55. The limit post 842 is used to limit the rotation range of the trip spring crank arm 55. The positions of the two limit posts 842 are respectively adapted to the closing position and the opening position of the trip spring crank arm 55.

[0067] like Figure 12 As shown, in some embodiments, the two ends of the trip spring (not shown) are provided with trip spring caps 57. One end of the trip spring (not shown) abuts against one end of the trip spring shaft 56 through the trip spring cap 57, and the other end of the trip spring (not shown) abuts against the trip spring adjusting plate 58 through the trip spring cap 57.

[0068] like Figure 12As shown, in some embodiments, the trip spring adjusting plate 58 is an L-shaped plate, with one side conforming to the support plate 84 and the other side angled towards the trip spring shaft 56. A through hole is provided on the side of the trip spring adjusting plate 58 facing the trip spring shaft 56, through which the trip spring shaft 56 passes. A trip spring adjusting hole 581 is provided on the side of the trip spring adjusting plate 58 conforming to the support plate 84. An adjusting post 843 is provided on the support plate 84 corresponding to the trip spring adjusting hole 581. The trip spring adjusting plate 58 is mounted on the adjusting post 843 through the trip spring adjusting hole 581, and the mounting position of the trip spring adjusting plate 58 is adjustable. By adjusting the position of the trip spring adjusting plate 58, on the one hand, the preload of the trip spring can be adjusted without changing the trip spring model; on the other hand, the same preload can be obtained according to different trip spring models, that is, different trip springs can be adapted to obtain the same preload.

[0069] like Figure 2 , 4 As shown in -5 and 8-9, in some embodiments, two sets of indicating mechanisms 60 are also included. The two sets of indicating mechanisms 60 correspond one-to-one with the first drive spindle 312 and the second drive spindle 322 and are used to indicate the opening and closing status of the first vacuum circuit breaker 11 and the second vacuum circuit breaker 12, respectively. Each set of indicating mechanisms 60 includes an opening / closing indicating crank arm 61, an opening / closing transition plate 62, a pointer 63, and an indicating icon 64. The opening / closing indicating crank arm 61 is fixed on the corresponding drive spindle and rotates synchronously and coaxially with the drive spindle. One end of the opening / closing transition plate 62 is hinged to the opening / closing indicating crank arm 61, and the other end of the opening / closing transition plate 62 is drivenly connected to the pointer 63. The pointer 63 has an opening indicating position and a closing indicating position in its direction of movement. The indicating icon 64 includes an opening indicating icon and a closing indicating icon that correspond to the opening indicating position and the closing indicating position, respectively.

[0070] like Figure 2 , 4 As shown in Figures -5 and -8-9, in some embodiments, the pointer 63 of the indicating mechanism 60 includes a pointer shaft 630, a pointer body 631, and a pointer fork 632. The pointer body 631, pointer fork 632, and pointer shaft 630 are coaxially arranged and rotate synchronously. A lever 622 is provided at the other end of the opening / closing transition plate 62, and the lever 622 is kinetically connected to the pointer fork 632. When the opening / closing state of the vacuum circuit breaker changes, the corresponding drive shaft rotates, causing the opening / closing indicator crank arm 61 to rotate, which in turn moves the opening / closing transition plate 62. The lever 622 moves the pointer fork 632, which in turn causes the pointer shaft 630 and pointer body 631 to rotate. The pointer body 631 rotates and points to the corresponding indicator icon 64.

[0071] like Figure 10As shown, in some embodiments, the switching transition plate 62 has a waist-shaped hole 621 in the middle, and a support plate 84 is provided inside the housing 80. The support plate 84 has a guide post 841 corresponding to the waist-shaped hole 621, and the guide post 841 passes through the waist-shaped hole 621. When the manual tripping mechanism is activated to manually trip the circuit breaker, the switching indicator crank arm 61 is driven to rotate, thereby driving the switching transition plate 62 to move. At this time, the waist-shaped hole 621 moves relative to the guide post 841, while the guide post 841 of the support plate 84 is in a stationary state. The guide post 841 guides and limits the movement of the switching transition plate 62. The movement of the switching transition plate 62 drives the lever 622 to move, and the lever 622 moves the pointer fork 632.

[0072] like Figure 1 As shown, in some embodiments, each of the first three-phase electrical connectors 21 and the second three-phase electrical connectors 22 is provided with a current transformer 71 and a voltage sensor 72, and each of the third three-phase electrical connectors 23 is provided with a voltage sensor 72.

[0073] like Figure 1 , 3 As shown in 5, 8-9, in some embodiments, the top of the pole has a recessed receiving space, and the voltage sensors 72 of the first three-phase electrical connector 21 and the third three-phase electrical connector 23 are disposed in the receiving space at the top of the pole; the bottom of the pole has a recessed receiving space, and the voltage sensor 72 of the second three-phase electrical connector 22 is disposed in the receiving space at the bottom of the pole.

[0074] like Figure 1 , 3 As shown in Figures 5, 8-9, in some embodiments, the voltage sensors 72 of the first three-phase connector 21 and the third three-phase connector 23 are fixed to the poles via sensor mounting plates, and the voltage sensors 72 of the first three-phase connector 21 and the third three-phase connector 23 are spaced apart; the voltage sensor 72 of the second three-phase connector 22 is fixed to the poles via sensor mounting plates. Each pole has a recessed receiving space at its top, where the voltage sensors of the first and third three-phase connectors are located; each pole has a recessed receiving space at its bottom, where the voltage sensor of the second three-phase connector is located. This facilitates wiring between the poles and each phase connector, provides protection for the voltage sensors 72, ensures electrical insulation, and further enhances the compact structure.

[0075] like Figure 1 As shown, in some embodiments, the current transformer 71 is mounted on the first three-phase electrical connector 21 and the second three-phase electrical connector 22.

[0076] In some embodiments, the coaxial synchronous rotation of the parts on the shaft and the shaft is achieved by means of key connection or other methods.

[0077] In some embodiments, an insulating partition is provided between multiple pole posts to achieve insulation isolation between each pole post.

[0078] In some embodiments, an insulating partition is provided between the pole and the side panel of the enclosure to achieve insulation isolation between the pole and the enclosure.

[0079] In some embodiments, the housing 80 is formed by assembling multiple plates together through bending, fastening, or welding.

[0080] In some embodiments, the dual-break switch device of the present invention further includes an aviation plug to lead control circuits such as power supply status signal, switch status signal, interlock signal, and permanent magnet mechanism to the FTU.

[0081] In some embodiments, the double-disconnect switch device of the present invention further includes a terminal block, which is installed between a plurality of support columns at the bottom of the housing.

[0082] The double-break switch device of the present invention also includes a control system connected thereto, such as an intelligent controller, which monitors the action position in real time and ensures the reliability and accuracy of the opening and closing actions through logical judgment.

[0083] The double-break switch device of the present invention also includes a control system connected thereto. The control system further includes a fault handling module, which monitors the phase-to-phase current in real time. When a phase-to-phase short-circuit current (e.g., ≥20kA) is detected, the permanent magnet mechanism (opening coil) on the short-circuit side is instantaneously triggered to operate, with an arc extinguishing time ≤30ms. Simultaneously, the control system monitors the voltage and current on the other incoming line side in real time. When the voltage and current on the other incoming line side meet the closing conditions, the permanent magnet mechanism (opening coil) on that side is triggered to operate, thereby realizing the transfer of power supply.

[0084] The double-break switchgear of the present invention also includes a control system connected thereto. The control system further includes a fault handling module, which monitors the grounding current in real time. The module detects the milliampere-level grounding current through the phase current grounding protection device controller, and after a delay confirmation, performs the circuit breaker trip to isolate the fault area. Simultaneously, it monitors whether the other circuit meets the closing conditions; if the closing conditions are met, it switches the power supply.

[0085] The double-break switch device of the present invention also includes a control system connected thereto, and the control system also integrates an anti-pumping function to prevent the mechanism from malfunctioning due to multiple closing pulses.

[0086] The double-break switch device of the present invention also includes a control system connected thereto. The control system also supports the interaction between the wireless communication module and the distribution network automation system to realize remote "four remotes" (telemetry, remote control, remote signaling, and remote adjustment).

[0087] The double-break switch device of this invention can function as a two-input, one-output switch, supplying power to important users and loads through two different power supply lines. In the event of a fault in either line, it can automatically switch to the non-faulty main line, improving the reliability of power supply to important users. The device can be installed on important loads or major branch lines, achieving automatic switching between main and backup overhead lines via a circuit breaker with automatic switching function. It can reliably reconfigure power distribution terminal users, automatically selecting the main and backup power supplies. In the event of a power outage or undervoltage in the main power supply, it automatically switches to the backup power supply, achieving "self-transfer and self-restoration," ensuring the continuity and reliability of power supply.

[0088] The double-break switch device of this invention can function as a two-in-one-out switch. When overhead lines form a tandem power supply mode via tie switches, if a short circuit, grounding, or open-circuit fault occurs at any point on the main line, the system can quickly locate the fault point and isolate the faulty portion using devices such as phase current switching switches, preventing the fault from escalating and affecting the entire power grid. Through rapid fault isolation and dynamic load distribution, the scope and duration of power outages are significantly reduced. Power supply to non-faulty areas is restored via tie switches. Furthermore, users within the faulty area are transferred to the opposite power supply line via the two-in-one-out automatic switching switch, thereby ensuring power supply reliability.

[0089] The double-break switch device of the present invention can be used as a two-input, one-output switch, including two sets of ABC three-phase power input sides and one set of ABC three-phase power output sides, that is, it has two power supplies and can realize the switching of two circuits, or the switching of main power supply or backup power supply.

[0090] The double-break switch device of the present invention can be used as a two-input, one-output switch. Two sets of anti-misoperation devices, namely mechanical interlock and electrical interlock, are designed between the two power supplies to prevent power supply cross-circuiting and backflow.

[0091] The dual-break switch device of the present invention can be used as a two-input, one-output switch. It uses two permanent magnet mechanisms, each operating one power supply vacuum interrupter, to achieve the operation of opening and closing the circuit. It can switch the power supply in as little as 50ms within the inherent time.

[0092] The double-break switch device of this invention can function as a two-input, one-output switch. Three poles are arranged sequentially from left to right. Each pole contains two parallel, insulated, and stacked vacuum interrupters. Each vacuum interrupter includes a set of moving and stationary contacts with a permanent magnet drive structure. The permanent magnet mechanism drives the moving contact horizontally via a drive shaft, thereby achieving opening and closing with the stationary contact. Each permanent magnet mechanism can simultaneously open and close all three phases (A, B, and C). The two sets of permanent magnet mechanisms operate independently, opening and closing two circuits. A mechanical interlocking mechanism is provided on one side of the drive shaft of each set of permanent magnet mechanisms to prevent simultaneous closing of two power supplies and to prevent misoperation. On the other side of the drive shaft opposite the interlocking mechanism, there are two sets of closing / opening indicator mechanisms and a manual opening / closing mechanism. This arrangement of the three poles, with the drive shafts of the two sets of permanent magnet mechanisms arranged parallel to each other vertically, and the interlocking mechanism, manual opening / closing mechanism, and indicator mechanism on both sides of the drive shaft, results in a space-saving and compact overall layout.

[0093] The dual-break switch device of the present invention has two current transformers and a phase voltage sensor configured on one side of the pole, and a voltage sensor configured on the other side, with a maximum of 6 current transformers and 9 voltage sensors in total. By setting the current transformers and phase voltage sensors, it is possible to detect which power supply side is energized.

[0094] The normal opening and closing operation of the dual-break switch device of the present invention can be carried out electrically. The opening and closing action is completed by triggering the permanent magnet mechanism through the intelligent controller. Specifically, the opening and closing action is completed by triggering the capacitor discharge through the intelligent controller to drive the electromagnet of the permanent magnet mechanism.

[0095] The normal opening and closing operation of the double-break switch device of the present invention can be performed manually. In an emergency, the opening ring can be pulled by an insulating hook, and the opening spring can be mechanically unlocked to achieve forced opening (while still ensuring reliable disconnection of the load current).

[0096] The dual-break switch device of this invention uses a high-performance capacitor. The capacitor stores the electrical energy required for opening and closing the circuit. The main power supply or backup power supply charges the capacitor (charging time ≤ 10 seconds) to ensure rapid response. The capacitor energy storage enables millisecond-level action response (closing time ≤ 50ms, opening time ≤ 30ms).

[0097] The enclosure of the double-break switch device of the present invention is a welded enclosure. The incoming and outgoing lines are fixed by aluminum flanges and sleeved. The circuit breaker adopts a three-phase solid-sealed pole structure. The three-phase poles use epoxy resin structure, support wide temperature operation from -30℃ to +60℃, and have a protection level of IP67. It is suitable for high altitude (≤2000 meters) and polluted environments.

[0098] The above-described embodiments are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the present invention. It should be noted that those skilled in the art can make various modifications and improvements within the spirit and principles of the present invention, without departing from its conceptual framework. Any modifications, equivalent substitutions, or improvements made should be included within the scope of protection of the present invention.

Claims

1. A double-break switch device, characterized in that The utility model relates to a kind of double-break switch devices, including: Three-phase pole column mechanism, three-phase electrical connector and permanent magnet mechanism, Three-phase pole column mechanism includes three pole columns (10), each pole column (10) includes the first vacuum interrupter (11) and the second vacuum interrupter (12) arranged in pole column (10), static contact and moving contact are installed in the first vacuum interrupter (11) and the second vacuum interrupter (12); Three-phase electrical connector includes three first three-phase electrical connectors (21), three second three-phase electrical connectors (22) and three third three-phase electrical connectors (23); Two permanent magnet mechanisms, respectively first permanent magnet mechanism (31) and second permanent magnet mechanism (32); Three pole columns (10) are arranged side by side along the first direction, three pole columns (10) have first end and second end along the second direction, the first vacuum interrupter (11) and the second vacuum interrupter (12) of each pole column (10) are parallel to each other and are stacked along the third direction, the static contact of the first vacuum interrupter (11) and the second vacuum interrupter (12) of each pole column (10) is close to the first end of pole column (10) and is arranged, the moving contact of the first vacuum interrupter (11) and the second vacuum interrupter (12) of each pole column (10) is away from the first end of pole column (10) and is arranged, the first vacuum interrupter (11) and the second vacuum interrupter (12) of each pole column (10) are electrically connected with the first three-phase electrical connector (21) and the second three-phase electrical connector (22) respectively through the static contact of each other, the moving contact of the first vacuum interrupter (11) and the second vacuum interrupter (12) of each pole column (10) is parallel and is electrically connected with the third three-phase electrical connector (23), the first direction, the second direction and the third direction are orthogonal to each other; The operating rod (33) of first permanent magnet mechanism (31) is simultaneously transmission connection with the moving contact of the first vacuum interrupter (11) of three pole columns (10), for controlling the moving contact of all first vacuum interrupter (11) simultaneously act, to realize three first three-phase electrical connectors (21) simultaneously with three third three-phase electrical connectors (23) opening and closing; The operating rod (33) of second permanent magnet mechanism (32) is simultaneously transmission connection with the moving contact of the second vacuum interrupter (12) of three pole columns (10), for controlling the moving contact of all second vacuum interrupter (12) simultaneously act, to realize three second three-phase electrical connectors (22) simultaneously with three third three-phase electrical connectors (23) opening and closing.

2. The double-break switch device according to claim 1, wherein The first permanent magnet mechanism (31) and the second permanent magnet mechanism (32) are arranged at the second end of the three-phase pole column mechanism; The first permanent magnet mechanism (31) comprises a first permanent magnet operating mechanism (311) and a first driving main shaft (312); The second permanent magnet mechanism (32) comprises a second permanent magnet operating mechanism (321) and a second driving main shaft (322); The first permanent magnet operating mechanism (311) is arranged along the third direction, the second permanent magnet operating mechanism (321) is arranged along the third direction, and the first permanent magnet operating mechanism (311) and the second permanent magnet operating mechanism (321) are arranged side by side along the first direction. The first driving spindle (312) is arranged along the first direction, and the second driving spindle (322) is arranged along the first direction, and the first driving spindle (312) and the second driving spindle (322) are arranged side by side along the third direction; The operating rod (33) of the first permanent-magnet operating mechanism (311) is in transmission connection with the first driving spindle (312), and the operating rod (33) of the second permanent-magnet operating mechanism (321) is in transmission connection with the second driving spindle (322); The first driving spindle (312) is in transmission connection with the movable contact of all the first vacuum circuit breakers (11), and the second driving spindle (322) is in transmission connection with the movable contact of all the second vacuum circuit breakers (12).

3. The double-break switch device according to claim 2, wherein The first driving spindle (312) and the second driving spindle (322) are respectively provided with an operating crank (34) and a driving crank (35) which rotate synchronously and coaxially with the first driving spindle (312) and the second driving spindle (322); The operating rod (33) of the first permanent-magnet operating mechanism (311) and the operating rod (33) of the second permanent-magnet operating mechanism (321) are respectively in transmission connection with the operating crank (34) of the first driving spindle (312) and the operating crank (34) on the second driving spindle (322); The driving crank (35) on the first driving spindle (312) and the driving crank (35) on the second driving spindle (322) are respectively in transmission connection with the movable contact of the first vacuum circuit breaker (11) and the movable contact of the second vacuum circuit breaker (12).

4. The double-break switch device according to claim 1, characterized in that The first three-phase electrical connector (21) and the second three-phase electrical connector (22) in the three-phase pole mechanism are used for electrical connection with two power supply lines as the incoming line side, and the third three-phase electrical connector (23) in the three-phase pole mechanism is used for electrical connection with a load as the outgoing line side; Alternatively, the first three-phase electrical connector (21) and the second three-phase electrical connector (22) in the three-phase pole mechanism are used for electrical connection with two loads as the outgoing line side, and the third three-phase electrical connector (23) in the three-phase pole mechanism is used for electrical connection with a power supply as the incoming line side.

5. The double-break switch device according to claim 1, wherein Further comprising an interlocking mechanism which is in interlocking connection with the two permanent-magnet mechanisms and is used for preventing the first vacuum circuit breaker (11) and the second vacuum circuit breaker (12) from being closed at the same time.

6. The double-break switch device according to claim 5, wherein Further comprising two sets of manual opening mechanisms (50) and two sets of indicating mechanisms (60), the two sets of manual opening mechanisms (50) are respectively in manual control connection with the first permanent-magnet mechanism (31) and the second permanent-magnet mechanism (32) and are respectively used for opening the first vacuum circuit breaker (11) and the second vacuum circuit breaker (12), and the two sets of indicating mechanisms (60) are respectively used for indicating the opening and closing states of the first vacuum circuit breaker (11) and the second vacuum circuit breaker (12); The interlocking mechanism is arranged on one side of the three-phase pole mechanism along the first direction, and the manual opening mechanism (50) and the indicating mechanism (60) are arranged on the other side of the three-phase pole mechanism away from the interlocking mechanism along the first direction.

7. The double-break switch device according to claim 2, further comprising an interlocking mechanism connected to the two permanent magnet mechanisms and configured to prevent the first vacuum circuit breaker (11) and the second vacuum circuit breaker (12) from being closed simultaneously. The interlocking mechanism comprises an electrical interlocking mechanism and / or a mechanical interlocking mechanism (40). The electrical interlocking mechanism comprises a control circuit configured to perform electrical interlocking control. The mechanical interlocking mechanism (40) comprises a first interlocking lever assembly (41) connected to the first drive spindle (312), a second interlocking lever assembly (42) connected to the second drive spindle (322), and an interlocking assembly (43). When the first vacuum circuit breaker (11) is switched between the open state and the closed state, the first interlocking lever assembly (41) is switched between the first open position and the first closed position; when the second vacuum circuit breaker (12) is switched between the open state and the closed state, the second interlocking lever assembly (42) is switched between the second open position and the second closed position. The interlocking assembly (43) is connected to the first interlocking lever assembly (41) and the second interlocking lever assembly (42) in such a way that when one of the interlocking lever assemblies is in the closed position, the other interlocking lever assembly is limited to the open position.

8. The double-break switch device according to claim 7, wherein The first interlocking lever assembly (41) comprises a first interlocking lever (411) fixed to one end of the first drive spindle (312), and one end of the first interlocking lever (411) is provided with a first limiting pin (412). The second interlocking lever assembly (42) comprises a second interlocking lever (421) fixed to one end of the second drive spindle (322), and one end of the second interlocking lever (421) is provided with a second limiting pin (422). The first limiting pin (412) and the second limiting pin (422) are configured to approach each other when opened and have a tendency to move away from each other when closed. The interlocking assembly (43) comprises an interlocking plate (431) having a hinge hole (432) at one end and a waist-shaped hole (433) at the other end, the waist-shaped hole (433) having a proximal end close to the hinge hole (432) and a distal end away from the hinge hole (432). One of the first limiting pin (412) and the second limiting pin (422) is inserted into the hinge hole (432), and the other is inserted into the waist-shaped hole (433). When one of the interlocking lever assemblies is in the closed position, the limiting pin inserted into the waist-shaped hole (433) is limited to the distal end, and the first limiting pin (412) and the second limiting pin (422) cannot continue to move away from each other, and the other interlocking lever assembly is limited to the open position.

9. The double-break switch device according to claim 2, further comprising ​ The two sets of manual opening mechanisms (50) correspond to the two drive main shafts one by one, each set of manual opening mechanisms (50) comprises an opening shaft (51) and an opening limiting crank arm (52), the opening limiting crank arm (52) is fixed on the corresponding drive main shaft and rotates synchronously and coaxially with the drive main shaft, the axis of the opening shaft (51) is parallel to the axis of the corresponding drive main shaft, the opening shaft (51) can be operated to rotate around its axis, and a cam surface (511) is arranged on the outer periphery of the opening shaft (51); the cam surface (511) corresponds to the position of the opening limiting crank arm (52).

10. The double-break switch device according to claim 9, characterized in that, The two sets of indication mechanisms (60) correspond to the two drive main shafts one by one and are used to indicate the opening and closing states of the two sets of vacuum circuit breakers, each set of indication mechanisms (60) comprises an opening and closing indication crank arm (61), an opening and closing transfer plate (62), a pointer (63) and an indication icon (64), the opening and closing indication crank arm (61) is fixed on the corresponding drive main shaft and rotates synchronously and coaxially with the drive main shaft, one end of the opening and closing transfer plate (62) is hingedly connected with the opening and closing indication crank arm (61), the other end of the opening and closing transfer plate (62) is in transmission connection with the pointer (63), the pointer (63) has an opening indication position and a closing indication position in its movement direction, and the indication icon (64) comprises an opening indication icon (64) and a closing indication icon (64) corresponding to the opening indication position and the closing indication position respectively.

11. The double-break switch device according to claim 1, characterized in that, A current transformer (71) and a voltage sensor (72) are arranged on each of the first three-phase electrical connector (21) and the second three-phase electrical connector (22), and a voltage sensor (72) is arranged on each of the third three-phase electrical connector (23); Each of the pole columns has a recessed accommodation space at the top, and the voltage sensor (72) of the first three-phase electrical connector (21) and the third three-phase electrical connector (23) is arranged in the accommodation space at the top of the pole column; each of the pole columns has a recessed accommodation space at the bottom, and the voltage sensor (72) of the second three-phase electrical connector (22) is arranged in the accommodation space at the bottom of the pole column; and the current transformer (71) is sleeved on the first three-phase electrical connector (21) and the second three-phase electrical connector (22).

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