Switch cabinet isolation mechanism

Abstract

The utility model relates to a switch cabinet isolation mechanism, which comprises a mounting seat, an isolation shaft, a grounding shaft and a main shaft are rotatably arranged on the mounting seat, a linkage assembly is arranged among the isolation shaft, the grounding shaft and the main shaft, and the rotation of the isolation shaft and the grounding shaft drives the main shaft to rotate through the linkage assembly. The main shaft is fixedly provided with an isolation piece, the isolation piece comprises a blocking part, and the blocking part abuts against the grounding shaft or the isolation shaft and then locks rotation of the grounding shaft or the isolation shaft. By the adoption of the technical scheme, the isolation piece with the blocking part is arranged on the main shaft, when the isolation shaft or the grounding shaft drives the main shaft to rotate, the blocking part can abut against the other shaft to achieve locking, the structure is simple, misoperation is effectively prevented, the linkage assembly adopts the matching structure of the pin shaft, the connecting rod and the strip-shaped hole, and the linkage assembly is convenient to operate. The strip-shaped hole provides a certain movement allowance for the pin shaft, so that the transmission process is smoother, and clamping stagnation is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of switch cabinet technology, and in particular relates to a switch cabinet isolation mechanism. Background Technology

[0002] Switchgear is a key piece of equipment in power systems used for controlling, protecting, and isolating circuits. Its isolation mechanism is mainly used to realize circuit disconnection, isolation, and grounding operations, and is an important component to ensure the safe operation of the power system. The isolation mechanism of existing switchgear usually includes an isolation operating shaft, a grounding operating shaft, and corresponding interlocking structures to prevent misoperation and ensure the safety of operators.

[0003] However, existing switchgear isolation mechanisms still have shortcomings: on the one hand, the linkage structure is relatively complex, and the transmission between the isolation shaft and the grounding shaft relies on multiple connecting rods or gear assemblies, which is difficult to assemble and prone to wear and jamming after long-term use, affecting the smoothness and reliability of operation; on the other hand, the interlocking function is not perfect and lacks an effective mechanical interlocking mechanism, which may lead to equipment damage or even safety accidents due to operators accidentally operating the closing switch in the isolation or grounding state; in addition, the reset performance of existing mechanisms is poor and the cooperation design with the circuit breaker is not tight enough, making it difficult to achieve effective interlocking between isolation, grounding and closing operations. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects of the prior art by providing a switch cabinet isolation mechanism, which solves the problem of complex structure of the isolation mechanism.

[0005] The technical solution of this utility model is as follows: A switch cabinet isolation mechanism includes a mounting base, on which an isolation shaft, a grounding shaft, and a main shaft are rotatably mounted. A linkage component is provided between the isolation shaft, the grounding shaft, and the main shaft. The rotation of the isolation shaft and the grounding shaft is driven by the linkage component to rotate the main shaft. An isolation component is fixedly mounted on the main shaft. The isolation component includes a blocking part. After the blocking part abuts against the grounding shaft or the isolation shaft, the shaft is locked from rotating.

[0006] The linkage assembly includes a first pin connected to the isolation shaft, a second pin connected to the grounding shaft, and a linkage plate fixedly mounted on the main shaft. A third pin and a fourth pin are rotatably mounted on the linkage plate. A first connecting rod is hinged between the first pin and the third pin, and a second connecting rod is hinged between the second pin and the fourth pin. Both the first connecting rod and the second connecting rod have slotted holes for the first pin or the second pin to pass through and slide.

[0007] The linkage component also includes a telescopic rod, with its two sides respectively fixedly connected to the first pin and the second pin, and a telescopic spring sleeved on the telescopic rod.

[0008] By adopting the above technical solution, an isolation component with a blocking part is set on the main shaft. When the isolation shaft or the grounding shaft drives the main shaft to rotate, the blocking part can abut against the other shaft to achieve locking. The structure is simple and effectively prevents misoperation. The linkage component adopts a matching structure of pin shaft, connecting rod and strip hole. The strip hole provides a certain amount of play for the pin shaft, making the transmission process smoother and avoiding jamming. The setting of telescopic rod and telescopic spring allows the linkage component to operate for a certain stroke. After the distance between the two pin shafts decreases and then increases, the telescopic spring resets. Its elastic reset action will push the corresponding pin shaft to continue to move, so that the rotation of the isolation shaft and the grounding shaft has a gear feel.

[0009] A further feature of this invention is as follows: a protrusion is integrally or fixedly provided on the main shaft; an interlocking plate is slidably provided on the mounting base; when the main shaft rotates, the protrusion squeezes and pushes the interlocking plate to slide; a circuit breaker mechanism is provided on the mounting base; the circuit breaker mechanism includes a moving contact, a guide plate, and a closing switch that controls the movement of the moving contact to contact the guide plate; a transmission assembly is correspondingly provided on the mounting base for the closing switch; the closing switch drives the moving contact to rotate through its transmission assembly; the transmission assembly includes a latching plate for transmitting the action of the closing switch; after the interlocking plate slides towards the side away from the main shaft, the latching plate abuts against the interlocking plate when it is in action.

[0010] With the above-mentioned further configuration, a protrusion is provided on the main shaft, which works in conjunction with a sliding interlocking plate. When the main shaft rotates, the protrusion pushes the interlocking plate to move, so that the locking plate is blocked by the interlocking plate when it is in action. This achieves mechanical interlocking with the circuit breaker mechanism, ensuring that closing operation cannot be performed in the isolated or grounded state, and significantly improving the safety of the equipment.

[0011] A further feature of this invention is as follows: a first mounting component is fixedly mounted on the isolation shaft, and a first pin is rotatably mounted on the first mounting component; a second mounting component is fixedly mounted on the grounding shaft, and a second pin is rotatably mounted on the second mounting component; the first pin and the second pin are arranged in parallel.

[0012] With the above-mentioned further configuration, the first pin and the second pin are respectively mounted on the isolation shaft and the grounding shaft through the first mounting component and the second mounting component, and the two pins are arranged in parallel, resulting in a compact structure, high transmission accuracy, and easy assembly and maintenance.

[0013] A further feature of this invention is that the mounting base has a first arc-shaped groove and a second arc-shaped groove, the first pin portion is located in the first arc-shaped groove and swings along its trajectory, and the second pin portion is located in the second arc-shaped groove and swings along its trajectory.

[0014] With the above-mentioned further configuration, a first arc-shaped groove and a second arc-shaped groove are opened on the mounting base to guide the swing trajectory of the first pin and the second pin respectively, ensuring accurate motion path and further improving linkage reliability.

[0015] A further feature of this invention is that a spring element is provided between the mounting base and the interlocking plate, with both ends of the spring element being fixedly disposed relative to the mounting base and the interlocking plate, respectively.

[0016] By adopting the above-mentioned further configuration, a spring element is installed between the mounting base and the interlocking plate, so that the interlocking plate can automatically reset after the external force is lost, simplifying the operation process and improving the convenience of use.

[0017] A further feature of this invention is that the guide plate is slidably mounted on the mounting base, and the moving contact is rotatably mounted on the mounting base. After the moving contact rotates, it presses against the guide plate. The guide plate slides under the action of the moving contact, pressing against or separating from the isolation shaft and the grounding shaft, thereby locking and releasing the rotation of the isolation shaft and the grounding shaft.

[0018] With the above-described further configuration, the guide plate and the moving contact work together to drive the guide plate to slide when the moving contact is activated, thereby locking or releasing the isolation shaft and the grounding shaft. This structure forms a double interlocking protection, further enhancing operational safety.

[0019] A further feature of this invention is that the mounting base is also equipped with a gate opening switch, which drives the moving contact to rotate and separate from the guide plate.

[0020] With the above-mentioned further configuration, the gate opening switch is designed to facilitate manual control by the operator to separate the moving contact from the guide plate, adapting to various operating scenarios and improving the flexibility of the equipment.

[0021] A further feature of this invention is that the main shaft, the isolation shaft, and the grounding shaft are arranged in a triangular structure, and the blocking part is the protruding part on both sides of the isolation member.

[0022] With the above-mentioned further arrangement, the main shaft, isolation shaft, and grounding shaft are arranged in a triangular structure, which has a reasonable spatial layout, saves installation space, and the blocking part adopts the protruding parts on both sides of the isolation component. The structure is simple, easy to process, and the locking effect is reliable. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of the present utility model;

[0024] Figure 2 This is a schematic diagram of the overall structure from another perspective of a specific embodiment of the present utility model;

[0025] Figure 3This is a schematic diagram of the overall structure from a third-person perspective of a specific embodiment of the present utility model;

[0026] Figure 4 This is a schematic diagram of the linkage component in a specific embodiment of the present utility model;

[0027] Figure 5 This is a schematic diagram of the linkage component from another perspective in a specific embodiment of this utility model.

[0028] In the diagram: 1. Mounting base; 2. Isolation shaft; 21. First pin; 22. First connecting rod; 23. First mounting component; 3. Grounding shaft; 31. Second pin; 32. Second connecting rod; 33. Second mounting component; 4. Main shaft; 41. Linkage plate; 42. Third pin; 43. Fourth pin; 5. Isolation component; 51. Blocking part; 6. Protrusion; 7. Interlocking plate; 8. Moving contact; 9. Guide plate; 10. Closing switch; 11. Buckle plate; 12. Spring component; 14. Opening switch; 15. Telescopic rod; 16. Telescopic spring; 17. Strip hole. Detailed Implementation

[0029] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] It should be noted that in the description of this utility model, all directional indicators (such as up, down, forward, backward, etc.) are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0031] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a number" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0033] like Figure 1-5As shown, this embodiment provides a switch cabinet isolation mechanism, including a mounting base 1. An isolation shaft 2, a grounding shaft 3, and a main shaft 4 are rotatably mounted on the mounting base 1. The isolation shaft 2, grounding shaft 3, and main shaft 4 are arranged in a triangular structure, which is compact and saves space. An isolation component 5 is fixedly mounted on the main shaft 4. The isolation component 5 has protruding blocking parts 51 on both sides. The rotation of the main shaft 4 is driven by the rotation of the isolation shaft 2 or the grounding shaft 3. When the main shaft 4 rotates, the blocking parts 51 can rotate and abut against the grounding shaft 3 or the isolation shaft 2, thereby locking the rotation of the other shaft, realizing mechanical interlocking and preventing misoperation.

[0034] In this embodiment, a linkage component is provided between the isolation shaft 2, the grounding shaft 3, and the main shaft 4 to achieve linkage control among the three. Specifically, a first mounting component 23 is fixedly provided on the isolation shaft 2, and a first pin 21 is rotatably provided on the first mounting component 23. A second mounting component 33 is fixedly provided on the grounding shaft 3, and a second pin 31 is rotatably provided on the second mounting component 33. The first pin 21 and the second pin 31 are arranged in parallel to ensure transmission accuracy. A linkage plate 41 is fixedly provided on the main shaft 4, and a third pin 42 and a fourth pin 43 are rotatably provided on the linkage plate 41. A first connecting rod 22 is hinged between the first pin 21 and the third pin 42, and a second connecting rod 32 is hinged between the second pin 31 and the fourth pin 43. Both the first connecting rod 22 and the second connecting rod 32 have slotted holes 17. The first pin 21 and the second pin 31 pass through the corresponding slotted holes 17 and can slide along the slotted holes 17. The slotted holes 17 provide the pins with a movement margin, making the transmission process smoother and avoiding jamming.

[0035] The linkage assembly also includes a telescopic rod 15, with its two ends fixedly connected to the first pin 21 and the second pin 31, respectively. A telescopic spring 16 is sleeved on the telescopic rod 15. The distance between the first pin 21 and the second pin 31 changes after the corresponding isolation shaft 2 or grounding shaft 3 rotates. After the linkage assembly operates for a certain stroke, the distance between the two pins decreases and then increases. The telescopic spring has compression and reset actions. Its elastic reset action will push the corresponding pin to continue to move, so that the rotation of the isolation shaft 2 and the grounding shaft 3 has a gear feel. At the same time, after the isolation shaft 2 and the grounding shaft 3 rotate a certain angle against the elastic force of the telescopic spring 16, they are pushed by the reset elastic force of the telescopic spring 16.

[0036] In this embodiment, the mounting base 1 is also equipped with an interlocking mechanism for safety interlocking with the circuit breaker mechanism. A protrusion 6 is integrally or fixedly provided on the main shaft 4, and an interlocking plate 7 is slidably provided on the mounting base 1. When the main shaft 4 rotates, the protrusion 6 presses and pushes the interlocking plate 7 to slide away from the main shaft 4. The mounting base 1 is equipped with a circuit breaker mechanism, which includes a moving contact 8, a guide plate 9, and a closing switch 10. The closing switch 10 drives the moving contact 8 to rotate through a transmission assembly, which includes a latching plate 11. When the interlocking plate 7 is pushed to a predetermined position, the latching plate 11 abuts against the interlocking plate 7 during operation, thereby preventing the closing operation and ensuring that closing cannot be performed in an isolated or grounded state, significantly improving the safety of the equipment.

[0037] A spring element 12 is provided between the mounting base 1 and the interlocking plate 7. The two ends of the spring element 12 are fixed to the mounting base 1 and the interlocking plate 7 respectively. When the protrusion 6 no longer pushes the interlocking plate 7, the spring element 12 can make the interlocking plate 7 automatically reset, simplifying the operation process.

[0038] The guide plate 9 is slidably mounted on the mounting base 1, and the moving contact 8 is rotatably mounted on the mounting base 1. When the moving contact 8 rotates, one end of it presses against the guide plate 9, driving the guide plate 9 to slide. After the guide plate 9 slides, it can press against or separate from the isolation shaft 2 and the grounding shaft 3, thereby realizing the locking and releasing of the rotation of the isolation shaft 2 and the grounding shaft 3. This structure forms a double interlock protection, further enhancing operational safety.

[0039] The mounting base 1 is also equipped with a gate opening switch 14, which drives the moving contact 8 to rotate, causing the moving contact 8 to separate from the guide plate 9, making it easy for operators to manually control, adapting to various operating scenarios, and improving the flexibility of the equipment.

[0040] To guide the movement trajectory of the first pin 21 and the second pin 31, the mounting base 1 is provided with a first arc-shaped groove and a second arc-shaped groove; the first pin 21 is partially located in the first arc-shaped groove and swings along its trajectory; the second pin 31 is partially located in the second arc-shaped groove and swings along its trajectory. The setting of the arc-shaped groove ensures the accuracy of the pin movement path and further improves the linkage reliability.

[0041] The working principle of the isolation mechanism in this embodiment is briefly described as follows: When the isolation shaft 2 is rotated, the first pin 21 rotates with the isolation shaft 2, and drives the linkage plate 41 to rotate through the first connecting rod 22, thereby driving the main shaft 4 to rotate. The blocking part 51 on the main shaft 4 then abuts against the grounding shaft 3 to prevent it from rotating. At the same time, the protrusion 6 on the main shaft 4 pushes the interlocking plate 7 to move, cutting off the circuit breaker closing path. Conversely, when the grounding shaft 3 is operated, the main shaft 4 also rotates, the blocking part 51 abuts against the isolation shaft 2, and the interlocking plate 7 also moves.

Claims

1. A switchgear isolation mechanism, comprising a mounting base (1), wherein an isolation shaft (2), a grounding shaft (3), and a main shaft (4) are rotatably mounted on the mounting base (1), characterized in that: A linkage assembly is provided between the isolation shaft (2), the grounding shaft (3) and the main shaft (4). The rotation of the isolation shaft (2) and the grounding shaft (3) is driven by the linkage assembly to rotate from the main shaft (4). An isolation member (5) is fixedly provided on the main shaft (4). The isolation member (5) includes a blocking part (51). The blocking part (51) is locked to rotate after it abuts against the grounding shaft (3) or the isolation shaft (2). The linkage assembly includes a first pin (21) that is connected to the isolation shaft (2), a second pin (31) that is connected to the grounding shaft (3), and a linkage plate (41) fixedly mounted on the main shaft (4). A third pin (42) and a fourth pin (43) are rotatably mounted on the linkage plate (41). A first connecting rod (22) is hinged between the first pin (21) and the third pin (42), and a second connecting rod (32) is hinged between the second pin (31) and the fourth pin (43). Both the first connecting rod (22) and the second connecting rod (32) are provided with strip holes (17) for the first pin (21) or the second pin (31) to pass through and slide. The linkage assembly also includes a telescopic rod (15), which is fixedly connected to the first pin (21) and the second pin (31) on both sides, and a telescopic spring (16) is sleeved on the telescopic rod (15).

2. The switchgear isolation mechanism according to claim 1, characterized in that: The main shaft (4) is integrally or fixedly provided with a protrusion (6), and the mounting base (1) is slidably provided with an interlocking plate (7). When the main shaft (4) rotates, the protrusion (6) squeezes and pushes the interlocking plate (7) to slide. The mounting base (1) is provided with a circuit breaker mechanism. The circuit breaker mechanism includes a moving contact (8), a guide plate (9), and a closing switch (10) that controls the movement of the moving contact (8) to contact the guide plate (9). The closing switch (10) is provided with a transmission component on the mounting base (1). The closing switch (10) drives the moving contact (8) to rotate through its transmission component. The transmission component includes a latching plate (11) for transmitting the movement of the closing switch (10). After the interlocking plate (7) slides toward the side away from the main shaft (4), the latching plate (11) abuts against the interlocking plate (7) when it moves.

3. A switchgear isolation mechanism according to claim 1 or 2, characterized in that: A first mounting component (23) is fixedly installed on the isolation shaft (2), and the first pin (21) is rotatably installed on the first mounting component (23). A second mounting component (33) is fixedly installed on the grounding shaft (3), and the second pin (31) is rotatably installed on the second mounting component (33). The first pin (21) and the second pin (31) are arranged in parallel.

4. A switchgear isolation mechanism according to claim 1 or 2, characterized in that: The mounting base (1) has a first arc-shaped groove and a second arc-shaped groove. The first pin (21) is located in the first arc-shaped groove and swings along its trajectory. The second pin (31) is located in the second arc-shaped groove and swings along its trajectory.

5. The switchgear isolation mechanism according to claim 2, characterized in that: A spring element (12) is provided between the mounting base (1) and the interlocking plate (7), and the two ends of the spring element (12) are respectively fixed relative to the mounting base (1) and the interlocking plate (7).

6. The switchgear isolation mechanism according to claim 2, characterized in that: The guide plate (9) is slidably disposed on the mounting base (1), and the moving contact (8) is rotatably disposed on the mounting base (1). After the moving contact (8) rotates, it presses against the guide plate (9). The guide plate (9) slides under the action of the moving contact (8) and presses against or separates from the isolation shaft (2) and the grounding shaft (3), thereby locking and releasing the rotation of the isolation shaft (2) and the grounding shaft (3).

7. A switchgear isolation mechanism according to claim 6, characterized in that: The mounting base (1) is also provided with a gate opening switch (14), which drives the moving contact (8) to rotate and contact and separate from the guide plate (9).

8. The switchgear isolation mechanism according to claim 1, characterized in that: The main shaft (4), the isolation shaft (2) and the grounding shaft (3) are arranged in a triangular structure, and the blocking part (51) is the protruding part on both sides of the isolation member (5).

Images