Low-power circuit breaker tripping components

Abstract

This utility model discloses a low-power tripping assembly for a circuit breaker. The low-power tripping assembly is disposed between the middle partition and the front partition of the mechanism. A low-power electromagnet is mounted on the mounting plate of the low-power tripping assembly, and the push rod of the low-power electromagnet is connected to the top plate. The top plate is movably connected to a support rod. On the top plate, a rotating arm mating part is provided corresponding to the rotating arm on the tripping half-shaft, and a crank arm mating part is provided corresponding to the crank arm on the output shaft. The rotating arm mating part mates with the rotating arm, and the crank arm mating part mates with the crank arm. The low-power tripping assembly of this utility model is disposed on the middle partition, located between the middle partition and the front partition, effectively utilizing the space between the two partitions. This makes the overall structure of the circuit breaker mechanism more compact and aesthetically pleasing, and also helps to reduce the overall spatial volume of the mechanism, facilitating its layout.

Description

Technical Field

[0001] This utility model relates to the field of power grid distribution cabinets, and in particular to a low-power circuit breaker tripping component. Background Technology

[0002] Ring main units (RNUs) are widely used in substations and prefabricated substations in load centers such as urban residential areas, high-rise buildings, large public buildings, and factories. RNUs are equipped with disconnecting switches and circuit breaker mechanisms. These circuit breaker mechanisms not only disconnect and connect high-voltage lines and various no-load and load currents during normal system operation, but also, through the action of relay protection devices, automatically, quickly, and reliably cut off various overload currents and short-circuit currents when a system fault occurs, preventing the occurrence and escalation of the accident.

[0003] Circuit breaker mechanisms typically operate by driving a tripping rotor via a tripping assembly, which in turn drives the circuit breaker mechanism to trip. After tripping, the tripping electromagnet is reset by a return spring. This type of circuit breaker mechanism usually uses a DC regulated electromagnet. However, when using passive protection with induced current, a bistable low-power electromagnet is required. Conventional tripping assemblies are usually located on the front partition of the circuit breaker mechanism, occupying space on the front partition. In addition to the tripping assembly, the front partition usually also houses interlocking structures, resulting in a complex and bulky layout that increases the overall volume of the circuit breaker mechanism and hinders its placement. Utility Model Content

[0004] To address the shortcomings of existing circuit breaker mechanisms, the applicant provides a reasonably structured low-power circuit breaker tripping assembly. In the case of induced current used for passive protection, the low-power tripping assembly is used for tripping to ensure successful tripping. The low-power tripping assembly is located between the middle partition and the front partition, simplifying the structural layout on the front partition and making the overall structure of the mechanism more compact and aesthetically pleasing, which helps to reduce the overall space volume of the mechanism.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A low-power tripping assembly for a circuit breaker is disposed between a middle partition and a front partition of the mechanism. A low-power electromagnet is mounted on the mounting plate of the low-power tripping assembly, and the push rod of the low-power electromagnet is connected to a top plate. The top plate is movably connected to a support rod. On the top plate, a rotating arm mating part is provided corresponding to the rotating arm on the tripping half shaft, and a crank arm mating part is provided corresponding to the crank arm on the output shaft. The rotating arm mating part and the crank arm mating part are mated with each other. When tripping, the low-power electromagnet pushes the top plate forward through the push rod, and the rotating arm mating part pushes the rotating arm. After tripping, the crank arm rotates with the output shaft, and the top plate is pushed back to its original position through the crank arm mating part.

[0007] As a further improvement to the above technical solution:

[0008] The rotating arm mating part is located on the side of the top plate near the opening half shaft, extending upward toward the opening half shaft; the rotating arm mating part is a triangular protrusion, and its outer apex corner and the connection part with the main body of the top plate are rounded.

[0009] The crank arm fitting part is located on the side of the top plate near the output shaft and extends forward toward the output shaft; the crank arm fitting part is a triangular protrusion, and its outer apex and the part connecting with the main body of the top plate are rounded.

[0010] The top plate has a T-shaped connecting groove corresponding to the top rod, and the top rod has a corresponding T-shaped connector, which is locked in the connecting groove.

[0011] The top plate has mounting holes for the corresponding support rods. The mounting holes are oblong holes, and the support rods are inserted into the mounting holes.

[0012] The top plate has clearance holes and weight reduction holes.

[0013] The low-power tripping component is located below the tripping half-shaft and to the left of the output shaft; the mounting plate is fixed on the middle partition.

[0014] The swing arm is fixed on the half-shaft of the tripping circuit breaker. The plate surface of the swing arm is parallel to the axial direction of the half-shaft of the tripping circuit breaker and perpendicular to the middle partition plate. The plate surface of the top plate is perpendicular to the swing arm.

[0015] The crank arm is mounted on the output shaft. The surface of the crank arm is perpendicular to the axial direction of the output shaft and parallel to the middle partition. The surface of the top plate and the surface of the crank arm are on the same plane.

[0016] The top plate is parallel to the middle partition and perpendicular to the trip half shaft and the output shaft.

[0017] The beneficial effects of this utility model are as follows:

[0018] This utility model's low-power tripping assembly is suitable for applications where tripping occurs under passive protection induced current, ensuring successful tripping even in passive protection operating conditions. The low-power tripping assembly is mounted on the middle partition, located between the middle and front partitions. On one hand, it provides space for the interlocking structure on the front partition, facilitating a simpler and more aesthetically pleasing structural arrangement. On the other hand, the placement of the low-power tripping assembly between the middle and front partitions effectively utilizes the space between the two partitions, resulting in a more compact and aesthetically pleasing overall circuit breaker mechanism. This also helps reduce the overall volume of the mechanism and facilitates its layout. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention. At this time, the tripping component has not been pushed out, and the output shaft has not been tripped.

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the top plate.

[0021] Figure 3 This is a schematic diagram of the main structure of this utility model. At this time, the tripping component has not been pushed out and the output shaft has not been tripped.

[0022] Figure 4 This is a schematic diagram of the main structure of this utility model. At this time, the tripping component is pushed out, and the output shaft trips.

[0023] In the diagram: 10. Low-power tripping component; 1. Mounting plate; 2. Low-power electromagnet; 3. Top rod; 31. Connector; 4. Top plate; 41. Rotary arm mating part; 42. Crank arm mating part; 43. Connecting groove; 44. Mounting hole; 45. Clearance hole; 46. Weight reduction hole; 5. Support rod;

[0024] 20. Middle partition; 30. Half shaft of tripping switch; 301. Rotary arm; 40. Output shaft; 401. Crank arm. Detailed Implementation

[0025] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0026] like Figure 1 As shown, the low-power tripping assembly 10 of this utility model is disposed on the intermediate partition 20, with a tripping half-shaft 30 and an output shaft 40 passing through the intermediate partition 20. A rotating arm 301 is disposed on the tripping half-shaft 30, and a crank arm 401 is disposed on the output shaft 40. The low-power tripping assembly 10 cooperates with the rotating arm 301 and the crank arm 401 respectively. The low-power tripping assembly 10 is suitable for applications where tripping is performed under passive protection induced current, ensuring successful tripping even under passive protection operating conditions. The low-power tripping assembly 10 is disposed on the intermediate partition 20, located between the intermediate partition 20 and the front partition of the mechanism. On the one hand, it provides space for the interlocking structure on the front partition, facilitating the structural arrangement on the front partition and making the structure simpler and more aesthetically pleasing. On the other hand, the placement of the low-power tripping assembly 10 between the intermediate partition 20 and the front partition effectively utilizes the space between the two partitions, making the overall structure of the circuit breaker mechanism more compact and aesthetically pleasing, and also reducing the overall spatial volume of the mechanism, thus facilitating its layout.

[0027] The tripping half-shaft 30 and the output shaft 40 pass vertically through the partition plate 20 in the front-rear direction, respectively. The rotating arm 301 is fixed in the mounting groove of the tripping half-shaft 30, and the plate surface of the rotating arm 301 is parallel to the axial direction of the tripping half-shaft 30 and perpendicular to the partition plate 20. The crank arm 401 is sleeved on the output shaft 40, and the plate surface of the crank arm 401 is perpendicular to the axial direction of the output shaft 40 and parallel to the partition plate 20.

[0028] The low-power tripping assembly 10 is located below the tripping half-shaft 30 and to the left of the output shaft 40. The low-power tripping assembly 10 includes a mounting plate 1, a low-power electromagnet 2, a push rod 3, a top plate 4, and a support rod 5. The mounting plate 1 is fixed to the middle partition 20, the low-power electromagnet 2 is fixedly connected to the mounting plate 1, the push rod 3 is mounted on the low-power electromagnet 2, the push rod 3 is connected to the top plate 4, the top plate 4 is movably connected to the support rod 5, and the support rod 5 is fixed to the mounting plate 1.

[0029] like Figure 1 , Figure 2 As shown, the surface of the top plate 4 is parallel to the middle partition plate 20 and perpendicular to the tripping half-shaft 30 and the output shaft 40. The surface of the top plate 4 is perpendicular to the rotating arm 301, which extends downward toward the top plate 4. The surface of the top plate 4 and the surface of the crank arm 401 are on the same plane, and the crank arm 401 extends outward radially. A rotating arm mating part 41 is provided on the side of the top plate 4 near the tripping half-shaft 30, extending upward toward the tripping half-shaft 30. The rotating arm mating part 41 mates with the rotating arm 301. The rotating arm mating part 41 is a triangular protrusion, and its outer apex and the connection part with the main body of the top plate 4 are rounded. A crank arm mating part 42 is provided on the side of the top plate 4 near the output shaft 40, extending forward toward the output shaft 40. The crank arm mating part 42 mates with the crank arm 401. The crank arm mating part 42 is a triangular protrusion, and its outer apex and the connection part with the main body of the top plate 4 are rounded. The top plate 4 has a T-shaped connecting groove 43 corresponding to the top rod 3, and a T-shaped connector 31 is correspondingly provided on the top rod 3. The connector 31 is engaged in the connecting groove 43. The top rod 3 and the top plate 4 are connected through the T-shaped connector 31 and the connecting groove 43, which improves the stability and reliability of the connection. The top plate 4 has a mounting hole 44 corresponding to the support rod 5. The mounting hole 44 is an oblong hole. The support rod 5 is inserted into the mounting hole 44, and the top plate 4 can move left and right along the support rod 5 through the mounting hole 44. The top plate 4 also has a clearance hole 45 and a weight reduction hole 46. The clearance hole 45 allows the operating tool to pass through the clearance hole 45 and operate the connecting parts on the middle partition 20. The weight reduction hole 46 reduces the weight of the top plate 4, making the top plate 4 lighter. While ensuring strength, this makes the drive of the low-power electromagnet 2 on the top plate 4 more stable and smooth, ensuring the stability and reliability of the movement of the top plate 4.

[0030] When using this utility model for circuit breaker tripping: For example Figure 3 As shown, when the output shaft 40 is closed, the crank arm 401 rotates away from the movement path of the crank arm mating part 42 of the top plate 4, releasing the movement restriction on the top plate 4; after the low-power electromagnet 2 is energized, the push rod 3 pushes out, pushing the top plate 4 forward toward the output shaft 40, and the crank arm mating part 41 of the top plate 4 pushes against the crank arm 301, thereby driving the tripping half shaft 30 to rotate, releasing the locking of the tripping half shaft 30 to the tripping button, and then the tripping button can perform the tripping operation on the output shaft 40; as Figure 4 As shown, after the output shaft 40 is opened, the crank arm 401 rotates in the direction of the output shaft 40 toward the top plate 4. The crank arm 401 pushes the top plate 4 back toward the low-power electromagnet 2 through the crank arm mating part 42. The rotating arm 301 releases the restriction on the rotating arm 301, and the opening half shaft 30 rotates back to reset and relocks the opening button.

[0031] The above description is an explanation of the present utility model and not a limitation thereof. The present utility model can be modified in any form without departing from its spirit.

Claims

1. A low-power tripping component for a circuit breaker, characterized in that: The low-power tripping assembly (10) is disposed between the middle partition (20) and the front partition of the mechanism; a low-power electromagnet (2) is disposed on the mounting plate (1) of the low-power tripping assembly (10), the push rod (3) of the low-power electromagnet (2) is connected to the top plate (4), and the top plate (4) is movably connected to the support rod (5); on the top plate (4), a rotating arm mating part (41) is disposed corresponding to the rotating arm (301) on the tripping half shaft (30), and a rotating arm mating part (41) is disposed corresponding to the output shaft (40). The crank arm (401) is provided with a crank arm mating part (42), the rotating arm mating part (41) is mated with the rotating arm (301), and the crank arm mating part (42) is mated with the crank arm (401). When the circuit is opened, the low power electromagnet (2) pushes the top plate (4) forward through the push rod (3), and the rotating arm mating part (41) pushes the rotating arm (301). After the circuit is opened, the crank arm (401) rotates with the output shaft (40) and pushes the top plate (4) back to reset through the crank arm mating part (42).

2. The low-power circuit breaker tripping assembly according to claim 1, characterized in that: The rotating arm fitting part (41) is located on the side of the top plate (4) near the tripping half shaft (30) and extends upward toward the tripping half shaft (30); the rotating arm fitting part (41) is a triangular protrusion, and its outer end apex and the part connected to the main body of the top plate (4) are rounded.

3. The low-power circuit breaker tripping assembly according to claim 1, characterized in that: The crank arm fitting part (42) is located on the side of the top plate (4) near the output shaft (40) and extends forward toward the output shaft (40); the crank arm fitting part (42) is a triangular protrusion, and its outer end apex and the part connected to the main body of the top plate (4) are respectively rounded.

4. The low-power circuit breaker tripping assembly according to claim 1, characterized in that: The top plate (4) has a T-shaped connecting groove (43) corresponding to the top rod (3), and the top rod (3) has a corresponding T-shaped connector (31) which is locked in the connecting groove (43).

5. The low-power circuit breaker tripping assembly according to claim 1, characterized in that: The top plate (4) has a mounting hole (44) corresponding to the support rod (5). The mounting hole (44) is an oblong hole, and the support rod (5) is inserted into the mounting hole (44).

6. The low-power circuit breaker tripping assembly according to claim 1, characterized in that: The top plate (4) is provided with a clearance hole (45) and a weight reduction hole (46).

7. The low-power circuit breaker tripping assembly according to claim 1, characterized in that: The low-power tripping component (10) is located below the tripping half shaft (30) and to the left of the output shaft (40); the mounting plate (1) is fixed on the middle partition (20).

8. The low-power circuit breaker tripping assembly according to claim 1, characterized in that: The rotating arm (301) is fixed on the tripping half shaft (30). The plate surface of the rotating arm (301) is parallel to the axial direction of the tripping half shaft (30) and perpendicular to the middle partition (20). The plate surface of the top plate (4) is perpendicular to the rotating arm (301).

9. The low-power circuit breaker tripping assembly according to claim 1, characterized in that: The crank arm (401) is sleeved on the output shaft (40). The plate surface of the crank arm (401) is perpendicular to the axial direction of the output shaft (40) and parallel to the middle partition (20). The plate surface of the top plate (4) and the plate surface of the crank arm (401) are on the same plane.

10. The low-power circuit breaker tripping assembly according to claim 1, characterized in that: The top plate (4) is parallel to the middle partition (20) and perpendicular to the trip half shaft (30) and the output shaft (40).

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