An upper isolating circuit breaker switch

Abstract

The utility model relates to an upper isolation circuit breaker switch, through connecting three groups of vacuum arc extinguishing chambers together on the main shaft, and cooperating corresponding cam transmission assembly, movable contact assembly and static contact assembly, realized the high integration of switch internal structure, effectively reduced the overall volume, the linkage cooperation design of main shaft and cam transmission assembly makes the operation of vacuum arc extinguishing chamber more simple, movable contact assembly installs in the backing pad, and the backing pad installs on the mechanism frame, and this design provides stable support and installation basis for movable contact assembly, and the setting of grounding support, grounding bus and grounding knife provides perfect grounding protection function for the switch, when the switch appears the failure or equipment needs to overhaul, the grounding knife can cooperate with static contact assembly quickly, and the equipment can be reliably grounded, prevents the operator from electric shock, and guarantees personal safety and equipment safety.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker switch technology, and in particular to an upper isolating circuit breaker switch. Background Technology

[0002] In power systems, the upper-level isolating circuit breaker (EDB) is a critical electrical device, undertaking important functions such as circuit connection, disconnection, and isolation. Its performance directly affects the safe and stable operation of the power system. Over long-term use, traditional EDBs have gradually revealed problems: electromagnetic interference generated inside the switch can easily accumulate and spread internally. This not only affects the normal operation of the switch itself, leading to malfunctions and signal distortion, but also results in an inadequate design of the moving contact assembly structure and insufficiently tight and secure connections between components, making them prone to loosening, shifting, or shaking during operation. Furthermore, the internal layout of traditional switches is not rational, with components scattered throughout, resulting in a large overall size and space-consuming operation, making them unsuitable for installation and use in space-constrained locations. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a highly integrated upper isolating circuit breaker switch with strong electromagnetic interference protection capability and stable and reliable operation.

[0004] To achieve the above objectives, this utility model employs an upper-disconnecting circuit breaker switch, comprising a frame and a vacuum interrupter assembly mounted on the frame. The vacuum interrupter assembly includes three sets of vacuum interrupters. The frame is provided with moving contact assemblies and stationary contact assemblies corresponding to the number of vacuum interrupters. One end of each of the three sets of vacuum interrupters is connected to a main shaft, which is rotatably mounted on the frame. Cam transmission assemblies corresponding to the number of vacuum interrupters are mounted on the main shaft, and these cam transmission assemblies are used to drive the corresponding vacuum interrupters in conjunction with the main shaft. Each vacuum interrupter is connected to a moving contact assembly at the end furthest from the cam transmission assembly, and a pad mounted on the frame is provided at the corresponding position. The moving contact assembly is mounted within the pad. A stationary contact mounting plate is provided on the frame, located at the end furthest from the vacuum interrupter, and a stationary contact assembly is mounted on the stationary contact mounting plate.

[0005] The beneficial effects of the above structure are as follows: by connecting the three sets of vacuum interrupters together on the main shaft, and cooperating with the corresponding cam drive assembly, moving contact assembly, and stationary contact assembly, a high degree of integration of the internal structure of the switch is achieved, effectively reducing the overall volume. The linkage design between the main shaft and the cam drive assembly makes the operation of the vacuum interrupter more convenient. The moving contact assembly is installed in the pad, and the pad is installed on the frame. This design provides stable support and installation foundation for the moving contact assembly. The setting of the grounding bracket, grounding busbar, and grounding knife provides the switch with a complete grounding protection function. When the switch malfunctions or the equipment needs to be repaired, the grounding knife can quickly cooperate with the stationary contact assembly to reliably ground the equipment, prevent electric shock to operators, and ensure personal safety and equipment safety.

[0006] This utility model is further configured such that a flexible mounting plate is provided between the cam transmission assembly and the vacuum interrupter, and a first flexible connecting plate is mounted on the flexible mounting plate. One end of the first flexible connecting plate is mounted on the flexible mounting plate, and the other end extends out of the mechanism frame through a slot. An interrupter guide insulating plate is also provided between the flexible mounting plate and the vacuum interrupter, and the interrupter guide insulating plate is provided with a protrusion. The mechanism frame is provided with a corresponding fixing slot that connects to the protrusion. The first flexible connecting plate extends from the slot of the mechanism frame to the outside of the mechanism frame, which helps to guide electrical interference signals such as electromagnetic interference that may be generated inside the switch to the outside, avoiding the accumulation and diffusion of interference inside the switch, thereby reducing interference to the switch itself and other electrical equipment, and improving the stability and reliability of the entire electrical system. The presence of the flexible mounting plate can play a buffering and shock-absorbing role between the cam drive assembly and the vacuum interrupter. The interrupter guide insulating plate is sleeved on the vacuum interrupter and connected to the fixing slot on the mechanism frame through the protrusion on it. This not only provides precise guidance for the vacuum interrupter, ensuring that it moves along the predetermined trajectory during operation, avoiding deviation or shaking, but also ensures the stable and reliable switching performance of the switch.

[0007] This utility model is further configured such that the moving contact assembly includes an isolation crank arm, an isolation blade assembly, and a moving contact connector. The isolation crank arm has a U-shaped shell structure and an internal accommodating space for installing the isolation blade assembly. One end of the moving contact connector is mounted on a pad, and the other end extends into the accommodating space of the isolation crank arm and is connected to the support connector of the isolation blade assembly. The end of the isolation blade assembly extends outward from the isolation crank arm through a rectangular opening on the isolation crank arm and is positioned towards the corresponding stationary contact assembly. Adjacent isolation crank arms are connected in series to form an array through a nested structure of protrusions and grooves. The isolation crank arm, isolation blade assembly, and moving contact connector work together to form a compact structural layout. The isolation crank arm adopts a U-shaped shell structure with a dedicated internal space, providing a stable installation location for the isolation blade assembly. One end of the moving contact connector is firmly installed in the pad, while the other end extends downward into the receiving space of the isolation crank arm, tightly connected to the support connector of the isolation blade assembly. This allows the moving contact assembly to respond flexibly and connect stably during operation. Adjacent isolation crank arms are connected by a nested structure of protrusions and grooves, forming a series array. When subjected to external forces, this connection design can effectively disperse stress. Through the interlocking of the protrusions and grooves, the stress is evenly distributed, avoiding structural damage caused by local stress concentration.

[0008] This utility model is further configured such that a vacuum fixing seat is provided between the vacuum interrupter and the pad, the vacuum interrupter is mounted on the vacuum fixing seat, and a second flexible connecting plate is provided between the moving contact connector in the pad and the vacuum fixing seat. The vacuum fixing seat has a connecting groove, one end of the second flexible connecting plate is mounted on the moving contact connector, and the other end is connected to the vacuum interrupter through the connecting groove. Connecting the moving contact connector and the vacuum interrupter through the second flexible connecting plate, its excellent conductivity and flexibility ensure a tight and stable electrical connection between the two, effectively reducing contact resistance, helping to reduce power loss, improve the power transmission efficiency of the switch, reduce heat generation during equipment operation, and extend the service life of the equipment.

[0009] This utility model further specifies that the stationary contact assembly includes a stationary contact and a stationary contact baffle fixedly mounted on a stationary contact mounting plate. A stationary contact support plate is provided between the stationary contact and the stationary contact baffle. The stationary contact support plate has a U-shaped opening. The stationary contact is mounted on the stationary contact support plate, with a portion of the stationary contact passing through the U-shaped opening and abutting against the stationary contact baffle. By fixing the stationary contact to the stationary contact mounting plate, this mounting method provides stable support for the stationary contact, ensuring that it maintains the correct position and orientation when in contact with the moving contact. The stationary contact support plate not only supports the stationary contact, but its U-shaped opening design also makes the connection between the stationary contact and the stationary contact baffle more compact and reasonable. At the same time, the arrangement of the stationary contact support plate and the stationary contact baffle can optimize the electric field around the stationary contact.

[0010] This utility model is further configured with a frame including a front wall panel and a rear wall panel, as well as a first support plate and a second support plate, a first bracket plate and a second bracket plate installed between the front wall panel and the rear wall panel. The first bracket plate and the second bracket plate are both located at one end of the cam transmission assembly, and a circuit breaker transmission support plate is provided between them. The first support plate and the second support plate are located at one end of the moving contact assembly and are arranged in a bottom-up distribution. The front wall panel, rear wall panel, first support plate, second support plate, first bracket plate and second bracket plate together constitute the main frame of the mechanism. This multi-plate splicing structure design can significantly enhance the overall strength and rigidity of the mechanism. The first support plate and the second support plate, located at one end of the moving contact assembly and arranged in a bottom-up distribution, can withstand the force generated by the moving contact assembly during operation and evenly transmit it to the front wall panel and the rear wall panel. The first bracket plate and the second bracket plate, located at one end of the cam transmission assembly, can also provide support and stability for the cam transmission assembly, reasonably distributing the force during transmission. Furthermore, the circuit breaker transmission support plate provided between the first bracket plate and the second bracket plate provides a dedicated support platform for the cam transmission assembly.

[0011] This utility model is further configured with a grounding bracket installed between the front and rear wall panels. The grounding bracket is located at the other end of the moving contact assembly. A grounding busbar is provided on the grounding bracket, and a grounding blade that mates with the corresponding moving contact assembly is installed on the grounding busbar. The grounding blade has a grounding reinforcing bar with a connector adapted to the grounding blade. The grounding reinforcing bar is fitted into the top inner wall of the grounding blade through the connector. This connector securely fits the grounding blade near the top, enhancing the overall structural strength of the grounding blade and ensuring it is not easily deformed or damaged when subjected to fault current. The grounding bracket, grounding busbar, and grounding blade together constitute a complete grounding system. When the switchgear malfunctions, this system can quickly function. The grounding blade conducts the fault current to the ground through the grounding busbar and grounding bracket, effectively preventing electric shock to operators and providing comprehensive personal safety. Furthermore, the rational design of the grounding reinforcing bar further optimizes the current conduction path, improving the reliability and stability of the grounding system.

[0012] This utility model is further configured such that an isolation shaft assembly is mounted on the front wall panel, and a positioning shaft assembly is mounted on the rear wall panel. The isolation shaft assembly is connected to one end of the first isolation crank arm in the series array, and the positioning shaft assembly is connected to one end of the last isolation crank arm in the series array. By connecting the first and last isolation crank arms of the series array with the isolation shaft assembly and the positioning shaft assembly respectively, precise positioning and fixation are provided for the entire series array of moving contact assemblies. This helps prevent the moving contact assembly from shifting or wobbling during movement, thus improving the movement stability of the moving contact assembly. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0014] Figure 2 This is a schematic diagram of the assembly between the vacuum interrupter assembly and the cam drive assembly in an embodiment of this utility model.

[0015] Figure 3 This is a schematic diagram of the assembly between the vacuum interrupter chamber assembly and the moving contact assembly according to an embodiment of the present invention.

[0016] Figure 4 This is a schematic diagram of the static contact assembly structure according to an embodiment of the present utility model.

[0017] Figure 5 This is a schematic diagram of the internal structure of the grounding bracket according to an embodiment of the present utility model.

[0018] Figure 6 This is a schematic diagram of the frame structure of an embodiment of the present utility model. Detailed Implementation

[0019] like Figures 1-6 As shown, an embodiment of this utility model provides an upper isolating circuit breaker switch, including a frame 1, on which a vacuum interrupter group 2 is provided. The vacuum interrupter group 2 consists of three vacuum interrupters 21. The frame 1 is also equipped with moving contact assemblies 3 and stationary contact assemblies 4 corresponding to the number of vacuum interrupters 21. One end of the three vacuum interrupters 21 is connected to a main shaft 5. The main shaft 5 is rotatably mounted on the frame 1, and the main shaft 5 is equipped with a cam transmission assembly 6 matching the number of vacuum interrupters 21, which is used to drive the corresponding vacuum interrupter 21 in linkage with the main shaft 5. Each vacuum interrupter 21 is connected to the moving contact assembly 3 at the end away from the cam transmission assembly 6, and a pad 30 is provided at the corresponding position on the frame 1. The moving contact assembly 3 is installed in the pad 30. The frame 1 is provided with a stationary contact mounting plate 40 at the end away from the vacuum interrupter 21, and the stationary contact assembly 4 is installed on the stationary contact mounting plate 40.

[0020] A flexible mounting plate 61 is provided between the cam drive assembly 6 and the vacuum interrupter 21. A first flexible connecting plate 62 is mounted on the flexible mounting plate 61. One end of the first flexible connecting plate 62 is mounted on the flexible mounting plate 61, and the other end extends out of the mechanism frame 1 through the slot 10. An interrupter guide insulating plate 63 is also provided between the flexible mounting plate 61 and the vacuum interrupter 21 and is sleeved on the vacuum interrupter 21. The interrupter guide insulating plate 63 is provided with four protrusions 64. The mechanism frame 1 is provided with a corresponding fixing slot 20 that connects to the protrusions 64.

[0021] The moving contact assembly 3 includes an isolation crank arm 31, an isolation blade assembly 32, and a moving contact connector 33. The isolation crank arm 31 has a U-shaped housing structure and an internal space for installing the isolation blade assembly 32. One end of the moving contact connector 33 is mounted on the pad 30, and the other end extends into the space of the isolation crank arm 31 and is connected to the support connector of the isolation blade assembly 32 (the support connector is a key component connecting the moving contact connector 33 and the isolation blade assembly 32, used for force transmission and position fixing; its detailed structure is described in detail in the load switch patent filed at the same time). The end of the isolation blade assembly 32 extends outward from the isolation crank arm 31 through a rectangular opening on the isolation crank arm 31 and is positioned towards the corresponding stationary contact assembly 4. Adjacent isolation crank arms 31 are connected in series through a nested structure of protrusions and grooves to form a series array. The moving contact connector 33 is a T-shaped grounding contact, which is fixed by openings on both sides.

[0022] A vacuum fixing seat 22 is provided between the vacuum interrupter 21 and the pad 30. The vacuum interrupter 21 is installed on the vacuum fixing seat 22. A second flexible connecting plate 34 is provided between the moving contact connector 33 in the pad 30 and the vacuum fixing seat 22. A connecting groove is provided on the vacuum fixing seat 22. One end of the second flexible connecting plate 34 is installed on the moving contact connector 33, and the other end is connected to the vacuum interrupter 21 through the connecting groove. The stationary contact assembly 4 includes a stationary contact 41 and a stationary contact baffle 43 fixedly installed on the stationary contact mounting plate 40. A stationary contact support plate 42 is provided between the stationary contact 41 and the stationary contact baffle 43. The stationary contact support plate 42 has a U-shaped opening. The stationary contact 41 is installed on the stationary contact support plate 42, and part of the stationary contact 41 passes through the U-shaped opening of the stationary contact support plate 42 and abuts against the stationary contact baffle 43.

[0023] The frame 1 includes a front wall panel 11 and a rear wall panel 12, as well as a first support plate 13 and a second support plate 14, a first bracket plate 15 and a second bracket plate 16 installed between the front wall panel 11 and the rear wall panel 12. The first bracket plate 15 and the second bracket plate 16 are both located at one end of the cam transmission assembly 6, and a circuit breaker transmission support plate 7 is provided between them. The first support plate 13 and the second support plate 14 are located at one end of the moving contact assembly 3 and are arranged in a bottom-up distribution. A grounding bracket 8 is also installed between the front wall panel 11 and the rear wall panel 12. The grounding bracket 8 is located at the other end of the moving contact assembly 3. A grounding busbar 81 is provided on the grounding bracket 8. A grounding blade 82 that cooperates with the corresponding moving contact assembly 3 is installed on the grounding busbar 81. A grounding reinforcing plate 83 is provided on the grounding blade 82. The grounding reinforcing plate 83 has a plug interface that is adapted to the grounding blade 82. The grounding reinforcing plate 83 is sleeved on the inner top wall of the grounding blade 82 through the plug interface.

[0024] An isolation shaft assembly 17 is installed on the front wall panel 11, and a positioning shaft assembly 18 is installed on the rear wall panel 12. The isolation shaft assembly 17 is connected to one end of the first isolation crank arm 31 in the series array, and the positioning shaft assembly 18 is connected to one end of the last isolation crank arm 31 in the series array.

[0025] The first flexible connecting plate 62 and the second flexible connecting plate 34 can be expanded and replaced with left or right directions or types according to customer solutions, such as single outlet on the left or right, or double outlet direction, or vertical outlet on the left or right.

[0026] It should be noted that only one set of components is marked in detail in the diagram, but the entire structure contains three identical sets of components.

[0027] Of course, in addition to the above embodiments, this utility model may have other various embodiments. Without departing from the essential technical solution of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, and these changes or modifications are equivalent to the technical solution in this patent. Therefore, these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model, and the utility model creation is in line with the applicant's actual R&D capabilities and resource conditions.

Claims

1. A top-disconnecting circuit breaker switch, characterized in that: The system includes a frame and a vacuum interrupter assembly mounted on the frame. The vacuum interrupter assembly comprises three sets of vacuum interrupters. The frame is equipped with moving contact assemblies and stationary contact assemblies corresponding to the number of vacuum interrupters. One end of each of the three sets of vacuum interrupters is connected to a main shaft, which is rotatably mounted on the frame. Each main shaft is equipped with a cam drive assembly corresponding to the number of vacuum interrupters. The cam drive assembly is used to drive the corresponding vacuum interrupter in conjunction with the main shaft. Each vacuum interrupter has a moving contact assembly connected to its end away from the cam drive assembly, and a pad mounted on the frame is provided at the corresponding position. The moving contact assembly is installed inside the pad. The frame is equipped with a stationary contact mounting plate, which is located at the end away from the vacuum interrupter. A stationary contact assembly is mounted on the stationary contact mounting plate.

2. The upper isolating circuit breaker switch according to claim 1, characterized in that: A flexible mounting plate is provided between the cam drive assembly and the vacuum interrupter. A first flexible connecting plate is mounted on the flexible mounting plate. One end of the first flexible connecting plate is mounted on the flexible mounting plate, and the other end extends out of the mechanism frame through a slot. An interrupter guide insulation plate is also provided between the flexible mounting plate and the vacuum interrupter, and is sleeved on the vacuum interrupter. The interrupter guide insulation plate is provided with protrusions, and the mechanism frame is provided with corresponding fixing slots that connect to the protrusions.

3. The upper isolating circuit breaker switch according to claim 1, characterized in that: The moving contact assembly includes an isolation crank arm, an isolation blade assembly, and a moving contact connector. The isolation crank arm has a U-shaped shell structure and an internal space for installing the isolation blade assembly. One end of the moving contact connector is mounted on a pad, and the other end extends into the isolation crank arm's receiving space and is connected to the support connector of the isolation blade assembly. The end of the isolation blade assembly extends outward from the isolation crank arm through a rectangular opening and faces the corresponding stationary contact assembly. Adjacent isolation crank arms are connected in series to form an array through a nested structure of protrusions and grooves.

4. The upper isolating circuit breaker switch according to claim 3, characterized in that: A vacuum fixing seat is provided between the vacuum interrupter and the pad. The vacuum interrupter is installed on the vacuum fixing seat. A second flexible connecting plate is provided between the moving contact connector in the pad and the vacuum fixing seat. A connecting groove is provided on the vacuum fixing seat. One end of the second flexible connecting plate is installed on the moving contact connector, and the other end is connected to the vacuum interrupter through the connecting groove.

5. The upper isolating circuit breaker switch according to claim 4, characterized in that: The stationary contact assembly includes a stationary contact and a stationary contact baffle fixedly mounted on a stationary contact mounting plate. A stationary contact support plate is provided between the stationary contact and the stationary contact baffle. The stationary contact support plate has a U-shaped opening. The stationary contact is mounted on the stationary contact support plate, and part of the stationary contact passes through the U-shaped opening in the stationary contact support plate and abuts against the stationary contact baffle.

6. The upper isolating circuit breaker switch according to any one of claims 1-5, characterized in that: The frame includes a front wall panel and a rear wall panel, as well as a first support plate and a second support plate, a first bracket plate and a second bracket plate installed between the front wall panel and the rear wall panel. The first bracket plate and the second bracket plate are both located at one end of the cam transmission assembly, and a circuit breaker transmission support plate is provided between them. The first support plate and the second support plate are located at one end of the moving contact assembly and are arranged in a bottom-up distribution.

7. The upper isolating circuit breaker switch according to claim 6, characterized in that: A grounding bracket is also installed between the front wall panel and the rear wall panel. The grounding bracket is located at the other end of the moving contact assembly. A grounding busbar is provided on the grounding bracket. A grounding blade that cooperates with the corresponding moving contact assembly is installed on the grounding busbar. A grounding reinforcing plate is provided on the grounding blade. The grounding reinforcing plate has a plug-in interface that is adapted to the grounding blade. The grounding reinforcing plate is sleeved on the inner top wall of the grounding blade through the plug-in interface.

8. The upper isolating circuit breaker switch according to claim 7, characterized in that: An isolation shaft assembly is installed on the front wall panel, and a positioning shaft assembly is installed on the rear wall panel. The isolation shaft assembly is connected to one end of the first isolation crank arm in the series array, and the positioning shaft assembly is connected to one end of the last isolation crank arm in the series array.

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