An environmental protection cabinet circuit breaker interlocking mechanism

Abstract

This utility model provides an interlocking mechanism for an environmentally friendly circuit breaker, comprising an interlocking frame, an interlocking shaft, an interlocking rocker arm, and other components. The rotation of the interlocking shaft drives the interlocking rocker arm, interlocking linkage, and interlocking fork to move, thereby moving the interlocking locking plate to achieve the interlocking function; the interlocking contact detects the circuit breaker's status information. A limit linkage and a limit stop plate form a limit buffer structure to reduce impact force. A positioning lever and a positioning insert achieve the positioning function. This interlocking mechanism effectively prevents circuit breaker misoperation and improves operational safety; the limit buffer structure enhances the mechanism's reliability; accurate positioning ensures operational precision; and some components are made of environmentally friendly materials, resulting in low energy consumption and demonstrating environmental and energy-saving characteristics. Its simple structure facilitates maintenance and repair, and it has good application prospects.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection cabinet circuit breakers, and more specifically, to an interlocking mechanism for environmental protection cabinet circuit breakers. Background Technology

[0002] With the increasing demands for environmental protection and safety in power systems, environmental protection cabinets, as a new type of medium-voltage switchgear, are being used more and more widely in the power sector. The circuit breaker interlocking mechanism of the environmental protection cabinet is a key component, its main function being to ensure the safety and accuracy of the circuit breaker during opening and closing operations, preventing safety accidents caused by misoperation.

[0003] Currently, existing interlocking mechanisms for circuit breakers in environmental protection cabinets have many shortcomings. Regarding limit switches, most traditional interlocking mechanisms lack effective buffering designs. When the limit arm of the interlocking mechanism rotates to a certain angle to stop, the lack of a suitable buffer device means that the impact force generated during the movement cannot be effectively absorbed and dispersed. This results in the various components of the mechanism bearing significant stress during frequent limit switches, making them prone to wear and damage. Over long-term use, wear on components will reduce limit switch accuracy and may even lead to limit switch failure, seriously affecting the reliability and service life of the interlocking mechanism, increasing equipment maintenance costs and safety risks.

[0004] Regarding positioning accuracy, precise positioning cannot be achieved during the opening and closing of the circuit breaker caused by the rotation of the interlocking shaft. This can result in the circuit breaker potentially not being in the correct position during opening and closing, affecting not only its normal operating performance but also potentially causing problems such as poor contact and incomplete opening or closing, leading to power system failures and threatening the stable operation of the power grid. Therefore, we have made improvements and proposed an interlocking mechanism for environmentally friendly circuit breakers. Utility Model Content

[0005] The purpose of this utility model is to address the problems raised in the existing background technology. To achieve the above-mentioned purpose, this utility model provides the following technical solution: an interlocking mechanism for an environmental protection cabinet circuit breaker, comprising an interlocking frame, an interlocking shaft, an interlocking rocker arm, and an interlocking connecting rod. The interlocking shaft is mounted on the interlocking frame, the interlocking rocker arm is connected and mounted on the interlocking shaft, the interlocking shaft cooperates with a limiting mechanism, and a positioning mechanism is provided on the interlocking frame.

[0006] As a preferred technical solution of this utility model, one end of the interlocking linkage is hinged to the other end of the interlocking rocker arm, and the other end is hinged to the interlocking shift fork.

[0007] As a preferred technical solution of this utility model, it also includes an interlocking spring, one end of which is connected to the interlocking frame and the other end is connected to the interlocking fork; the interlocking fork cooperates with the interlocking locking plate.

[0008] As a preferred technical solution of this utility model, an interlocking contact is installed on the interlocking frame.

[0009] As a preferred technical solution of this utility model, the limiting mechanism includes a limiting connecting rod, a limiting baffle, a limiting support plate, a limiting arm, a limiting buffer block, and a limiting shaft pin. One end of the limiting connecting rod is hinged to the interlocking shaft, and the other end is hinged to the limiting baffle. The limiting support plate is fixedly installed on the interlocking frame, and one end of the limiting arm is rotatably installed on the limiting support plate.

[0010] As a preferred technical solution of this utility model, the limiting buffer block is installed on the limiting arm, and the limiting pin restricts the rotation angle of the limiting arm.

[0011] As a preferred technical solution of this utility model, the positioning mechanism includes a positioning lever, a positioning pad, a positioning stop, a positioning insert, a positioning bushing, and a positioning key block.

[0012] As a preferred technical solution of this utility model, one end of the positioning lever is fixedly connected to the interlocking shaft, and the other end is in contact with the positioning pad; the positioning stop is fixedly installed on the interlocking frame, the positioning insert is slidably installed on the positioning stop, the positioning bushing is sleeved on the positioning insert, and the positioning key block is installed on the positioning insert.

[0013] Compared with existing technologies, the beneficial effects of this utility model are as follows: The limit buffer block of this utility model plays a crucial buffering role in the limiting action of the mechanism. When the limit arm rotates to a certain angle, the limit buffer block can absorb and disperse the impact force generated during the movement, reducing wear and damage between components. The positioning system composed of the positioning lever, positioning pad, positioning insert, and positioning key block of this utility model can achieve precise positioning during the circuit breaker opening and closing operation. When the interlocking shaft rotates, the positioning lever pushes the positioning pad, causing the positioning insert to slide on the positioning stop, and finally the positioning key block accurately cooperates with the relevant components of the circuit breaker, ensuring that the circuit breaker is in the correct position during opening and closing, thus improving the accuracy of operation. The limiting system composed of the limit linkage, limit stop, limit arm, and limit pin of this utility model can precisely control the movement range of each component. The limitation of the rotation angle of the limit arm by the limit pin ensures the stability and accuracy of the mechanism during movement, avoiding malfunctions and damage caused by excessive movement of components. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of the present invention;

[0015] Figure 2 This is another structural schematic diagram of the present invention;

[0016] Figure 3 This is a partial structural schematic diagram of the present invention.

[0017] The image shows:

[0018] 1. Interlocking frame; 2. Interlocking shaft; 3. Interlocking rocker arm; 4. Interlocking connecting rod; 5. Interlocking shift fork; 6. Interlocking spring; 7. Interlocking locking plate; 8. Interlocking contact; 9. Limiting connecting rod; 10. Limiting stop plate; 11. Limiting support plate; 12. Limiting arm; 13. Limiting buffer block; 14. Limiting shaft pin; 15. Positioning lever; 16. Positioning pad; 17. Positioning stop bar; 18. Positioning insert; 19. Positioning bushing; 20. Positioning key block. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0020] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely illustrates some embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model. It should be noted that, in the absence of conflict, the embodiments and features and technical solutions in the embodiments of this utility model can be combined with each other. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] Example 1: An interlocking mechanism for an environmental protection cabinet circuit breaker includes an interlocking frame 1, an interlocking shaft 2, an interlocking rocker arm 3, and an interlocking connecting rod 4. The interlocking shaft 2 is mounted on the interlocking frame 1, and the interlocking rocker arm 3 is connected and mounted on the interlocking shaft 2. The interlocking shaft 2 cooperates with a limiting mechanism, and a positioning mechanism is provided on the interlocking frame 1. One end of the interlocking connecting rod 4 is hinged to the other end of the interlocking rocker arm 3, and the other end is hinged to the interlocking fork 5. One end of the interlocking spring 6 is connected to the interlocking frame 1, and the other end is connected to the interlocking fork 5; the interlocking fork 5 cooperates with the interlocking locking plate 7. An interlocking contact 8 is installed on the interlocking frame 1.

[0022] The limiting mechanism includes a limiting link 9, a limiting baffle 10, a limiting support plate 11, a limiting arm 12, a limiting buffer block 13, and a limiting pin 14. One end of the limiting link 9 is hinged to the interlocking shaft 2, and the other end is hinged to the limiting baffle 10. The limiting support plate 11 is fixedly mounted on the interlocking frame 1, and one end of the limiting arm 12 is rotatably mounted on the limiting support plate 11. The limiting buffer block 13 is mounted on the limiting arm 12, and the limiting pin 14 limits the rotation angle of the limiting arm 12.

[0023] The positioning mechanism includes a positioning lever 15, a positioning pad 16, a positioning stop 17, a positioning insert 18, a positioning bushing 19, and a positioning key block 20. One end of the positioning lever 15 is fixedly connected to the interlocking shaft 2, and the other end contacts the positioning pad 16; the positioning stop 17 is fixedly installed on the interlocking frame 1, the positioning insert 18 is slidably installed on the positioning stop 17, the positioning bushing 19 is sleeved on the positioning insert 18, and the positioning key block 20 is installed on the positioning insert 18.

[0024] Working principle of the interlocking mechanism of the circuit breaker in the environmental protection cabinet: The interlocking mechanism of this circuit breaker in the environmental protection cabinet is mainly composed of interlocking frame 1, interlocking shaft 2, interlocking rocker arm 3, interlocking connecting rod 4, interlocking fork 5, interlocking spring 6, interlocking locking plate 7, interlocking contact 8, limit connecting rod 9, limit stop plate 10, limit support plate 11, limit arm 12, limit buffer block 13, limit shaft pin 14, positioning lever 15, positioning pad block 16, positioning stop rod 17, positioning insert 18, positioning bushing 19, and positioning key block 20. Its working principle is explained in detail below:

[0025] When the circuit breaker in the environmental protection cabinet performs opening and closing operations, the external driving force causes the interlocking shaft 2 to rotate on the interlocking frame 1. Since one end of the interlocking rocker arm 3 is fixedly connected to the interlocking shaft 2, the rotation of the interlocking shaft 2 directly drives the interlocking rocker arm 3 to rotate synchronously. During the rotation of the interlocking rocker arm 3, the motion is transmitted to the interlocking connecting rod 4 through a hinged connection. The other end of the interlocking connecting rod 4 is hinged to the interlocking fork 5, thereby causing the interlocking fork 5 to move. When the interlocking fork 5 moves, it cooperates with the interlocking locking plate 7, pushing the interlocking locking plate 7 to move accordingly. The movement of the interlocking locking plate 7 plays a crucial interlocking role, which can restrict the opening and closing operations of the circuit breaker under specific conditions and prevent misoperation.

[0026] During the operation of the interlocking fork 5, the interlocking spring 6 undergoes elastic deformation. When the external driving force disappears, the interlocking spring 6 uses its elastic restoring force to pull the interlocking fork 5 back to its initial position, preparing for the next interlocking action.

[0027] The interlocking contact 8, installed on the interlocking frame 1, serves as a key detection component, enabling real-time monitoring of the circuit breaker's status. When the circuit breaker is in different operating states, such as closed or open, the interlocking contact 8 feeds back the corresponding status signal to the control system. Based on the received signal, the control system monitors and manages the operation of the entire environmental protection cabinet, ensuring the safe and stable operation of the power system.

[0028] As the interlocking shaft 2 rotates, the limiting link 9, which is hinged to it, moves along with the rotation of the interlocking shaft 2, and drives the limiting stop plate 10, which is hinged to it, to move. The limiting support plate 11 is fixed on the interlocking frame 1, and one end of the limiting arm 12 is rotatably mounted on the limiting support plate 11. When the limiting stop plate 10 moves, it pushes the limiting arm 12 to rotate around its mounting point.

[0029] The function of the limiting pin 14 is to limit the rotation angle of the limiting arm 12, ensuring that the limiting arm 12 rotates within a specified range. When the limiting arm 12 rotates to a certain position, the limiting buffer block 13 installed on it will play a buffering role, reducing the impact force generated by the mechanism during movement, protecting the various components from damage, and extending the service life of the mechanism.

[0030] When the interlocking shaft 2 rotates, the positioning lever 15 fixedly connected to it will rotate synchronously with the interlocking shaft 2. During the rotation, the positioning lever 15 will contact the positioning pad 16 and push the positioning pad 16 to move.

[0031] The positioning stop 17 is fixedly mounted on the interlocking frame 1, and the positioning insert 18 is slidably mounted on the positioning stop 17. The movement of the positioning pad 16 will cause the positioning insert 18 to slide on the positioning stop 17.

[0032] The positioning bushing 19 is fitted onto the positioning plate 18, which reduces the friction between the positioning plate 18 and the positioning stop 17, making the sliding of the positioning plate 18 smoother. The positioning key block 20 installed on the positioning plate 18 moves with the sliding of the positioning plate 18 and cooperates with the relevant components of the circuit breaker to achieve accurate positioning during the operation of the circuit breaker, ensuring that the circuit breaker can accurately complete the opening and closing actions.

[0033] The working process of the circuit breaker interlocking mechanism in the environmental protection cabinet, the closing preparation stage:

[0034] Initial state: The entire interlocking mechanism is in its initial state. Interlocking shaft 2 is stationary, and components such as interlocking rocker arm 3, interlocking link 4, interlocking fork 5, limit link 9, and positioning lever 15 are all in an inactive position. Interlocking spring 6 is in its natural state, interlocking locking plate 7 is in the initial position that restricts circuit breaker closing, and positioning key block 20 has not yet completed positioning engagement with relevant components of the circuit breaker.

[0035] The interlocking contact 8, installed on the interlocking frame 1, starts working and monitors the current status information of the circuit breaker in real time. If the circuit breaker is in the open state and the closing conditions are met, the interlocking contact 8 feeds back this status signal to the control system, and the control system issues a command to perform the closing operation.

[0036] According to the instructions of the control system, the operator applies an external driving force to start the interlocking shaft 2 rotating on the interlocking frame 1. Since one end of the interlocking rocker arm 3 is fixedly connected to the interlocking shaft 2, the rotation of the interlocking shaft 2 drives the interlocking rocker arm 3 to rotate synchronously. When the interlocking rocker arm 3 rotates, it transmits the motion to the interlocking link 4 through a hinged connection. The interlocking link 4 moves accordingly, driving the interlocking fork 5, which is hinged to it, to move. During the movement, the interlocking fork 5 pushes the interlocking locking plate 7 to move, releasing the restriction on the circuit breaker closing operation. During the movement of the interlocking fork 5, the interlocking spring 6 connected to it is stretched or compressed, undergoes elastic deformation, and stores elastic potential energy.

[0037] The rotation of the interlocking shaft 2 drives the movement of the limit link 9, which is hinged to it. The limit link 9 pulls the limit stop 10 to move. The movement of the limit stop 10 pushes the limit arm 12 to rotate around its mounting point on the limit support plate 11. When the limit arm 12 rotates to a certain angle, it will be restricted by the limit pin 14, ensuring that the limit arm 12 rotates within a specified range. The limit buffer block 13 installed on the limit arm 12 plays a buffering role during rotation, reducing the impact force during movement.

[0038] When the interlocking shaft 2 rotates, the positioning lever 15 fixed thereon rotates synchronously. During the rotation of the positioning lever 15, it contacts and pushes the positioning pad 16 to move. The movement of the positioning pad 16 causes the positioning insert 18 to slide on the positioning stop 17. The positioning bushing 19 reduces the friction between the positioning insert 18 and the positioning stop 17, making the sliding of the positioning insert 18 smoother. As the positioning insert 18 slides, the positioning key block 20 installed on it cooperates with the relevant components of the circuit breaker to achieve accurate positioning during the closing process, ensuring that the circuit breaker can close accurately.

[0039] Closing Completion and Holding Phase: After the interlocking mechanism completes the above series of actions, the circuit breaker successfully completes the closing operation. At this time, the interlocking contact 8 detects the closed state of the circuit breaker and feeds this status information back to the control system, which confirms the successful closing operation. The interlocking spring 6 remains in its deformed state, and its elastic force ensures that the interlocking fork 5 and the interlocking locking plate 7 remain in their current positions, maintaining the locking of the circuit breaker's closed state and preventing accidental tripping of the circuit breaker.

[0040] The circuit breaker tripping operation process is as follows: When a tripping operation is required, the control system issues a tripping command. The operator applies external driving force to rotate the interlocking shaft 2 in the reverse direction. The reverse rotation of the interlocking shaft 2 drives the interlocking rocker arm 3 to rotate in the reverse direction, and the interlocking rocker arm 3 drives the interlocking fork 5 to move in the reverse direction via the interlocking connecting rod 4. As the interlocking fork 5 moves in the reverse direction, the elastic potential energy of the interlocking spring 6 is gradually released, helping the interlocking fork 5 return to its initial position. At the same time, the interlocking fork 5 drives the interlocking locking plate 7 to move in the reverse direction, releasing the lock on the circuit breaker tripping operation.

[0041] The reverse rotation of the interlocking shaft 2 causes the limiting link 9 to move the limiting baffle 10 in the opposite direction, which in turn pushes the limiting arm 12 to rotate in the opposite direction. The limiting buffer block 13 again acts as a buffer, reducing the impact force during the reverse movement, while the limiting pin 14 still restricts the rotation angle of the limiting arm 12. As the interlocking shaft 2 rotates in the opposite direction, the positioning lever 15 pushes the positioning pad 16 to move in the opposite direction, thereby causing the positioning insert 18 to slide in the opposite direction on the positioning baffle 17. The positioning key block 20 separates from the circuit breaker components, releasing the positioning state.

[0042] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the utility model, are covered within the scope of the claims of the present utility model.

Claims

1. An interlocking mechanism for a circuit breaker in an environmental protection cabinet, characterized in that, It includes an interlocking frame (1), an interlocking shaft (2), an interlocking rocker arm (3), and an interlocking connecting rod (4). The interlocking shaft (2) is mounted on the interlocking frame (1), and the interlocking rocker arm (3) is connected and mounted on the interlocking shaft (2). The interlocking shaft (2) cooperates with a limiting mechanism, and a positioning mechanism is provided on the interlocking frame (1).

2. The interlocking mechanism for a circuit breaker in an environmental protection cabinet according to claim 1, characterized in that, One end of the interlocking link (4) is hinged to the other end of the interlocking rocker arm (3), and the other end is hinged to the interlocking fork (5).

3. The interlocking mechanism for a circuit breaker in an environmental protection cabinet according to claim 2, characterized in that, It also includes an interlocking spring (6), one end of which is connected to the interlocking frame (1) and the other end is connected to the interlocking fork (5); the interlocking fork (5) cooperates with the interlocking locking plate (7).

4. The interlocking mechanism for a circuit breaker in an environmental protection cabinet according to claim 1, characterized in that, Interlocking contacts (8) are installed on the interlocking frame (1).

5. The interlocking mechanism for a circuit breaker in an environmental protection cabinet according to claim 1, characterized in that, The limiting mechanism includes a limiting link (9), a limiting baffle (10), a limiting support plate (11), a limiting arm (12), a limiting buffer block (13), and a limiting pin (14). One end of the limiting link (9) is hinged to the interlocking shaft (2), and the other end is hinged to the limiting baffle (10). The limiting support plate (11) is fixedly installed on the interlocking frame (1), and one end of the limiting arm (12) is rotatably installed on the limiting support plate (11).

6. The interlocking mechanism for a circuit breaker in an environmental protection cabinet according to claim 5, characterized in that, The limiting buffer block (13) is installed on the limiting arm (12), and the limiting pin (14) limits the rotation angle of the limiting arm (12).

7. The interlocking mechanism for an environmental protection cabinet circuit breaker according to claim 1, characterized in that, The positioning mechanism includes a positioning lever (15), a positioning pad (16), a positioning stop (17), a positioning insert (18), a positioning bushing (19), and a positioning key block (20).

8. The interlocking mechanism for a circuit breaker in an environmental protection cabinet according to claim 7, characterized in that, One end of the positioning lever (15) is fixedly connected to the interlocking shaft (2), and the other end is in contact with the positioning pad (16); the positioning stop (17) is fixedly installed on the interlocking frame (1), the positioning insert (18) is slidably installed on the positioning stop (17), the positioning bushing (19) is sleeved on the positioning insert (18), and the positioning key block (20) is installed on the positioning insert (18).

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