Anti-seismic primary and secondary fused pole-mounted circuit breaker

Abstract

The application relates to the technical field of circuit breakers, in particular to an anti-seismic primary and secondary fusion pole-mounted circuit breaker, which comprises a pole column assembly, the lower end of the pole column assembly is provided with a base, one side of the pole column assembly is rotationally connected with an operating rod, one end of the operating rod is fixedly connected with an isolation pull rod, the front and rear ends of the isolation pull rod are movably connected with pull rings respectively, the lower side of one side of the base is fixedly installed with a fixing seat, one side of the fixing seat is fixedly connected with a fixing frame, a moving frame is arranged between the fixing frame and the fixing seat, and the moving frame and the fixing seat are connected through an elastic mechanism, the pole-mounted circuit breaker is provided with a limiting block and other guiding schemes, the limiting block and other guiding schemes constrain the vertical sliding of a pull lever and a working head, guarantee the accurate embedding of the working head into the pull ring, adapt to the opposite-position pulling operation, match the friction limiting and anti-seismic mechanism, stably lock the isolation pull rod, inhibit the shaking and loosening caused by wind, and prolong the service life of the equipment.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker technology, and in particular to a seismic-resistant pole-mounted circuit breaker that integrates primary and secondary circuits. Background Technology

[0002] Primary and secondary integrated pole-mounted circuit breakers are widely used in outdoor overhead power distribution lines. Due to their long-term outdoor installation, they are susceptible to continuous environmental factors such as wind and airflow disturbances. Existing conventional circuit breakers lack effective vibration-damping and anti-sway restraint structures at the isolating rod. During operation, wind can easily cause the isolating rod to oscillate and vibrate continuously. Under long-term conditions, this can lead to loosening of connections, component wear, and structural fatigue, resulting in mechanical loosening, positioning failure, or even component damage. This significantly shortens the overall service life of the equipment and affects the operational stability of the power distribution lines.

[0003] The existing operating adapter structure has design flaws: when manually assisting in opening and closing operations using the lever, the lever is difficult to accurately align with the adapter ring due to wind-induced displacement of the isolating lever and deviation of the ring alignment reference. Furthermore, during operation, the working head at the end of the lever is prone to significant angular deflection and radial rotation relative to the lever body. When the angular displacement is too large, the working head cannot smoothly engage with the ring, easily leading to operational jamming, alignment failure, and ineffective lever traction. This not only increases the difficulty of on-site maintenance but also easily causes safety hazards such as misoperation and incomplete operation, making it difficult to guarantee the accuracy and reliability of both electrical control and manual assistance operations. Therefore, a seismic-resistant, integrated primary and secondary pole-mounted circuit breaker is proposed. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by proposing a seismic-resistant primary and secondary integrated pole-mounted circuit breaker.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a seismic-resistant primary and secondary integrated pole-mounted circuit breaker, comprising a pole assembly, a base provided at the lower end of the pole assembly, an operating rod rotatably connected to one side of the pole assembly, an isolation rod fixedly connected to one end of the operating rod, pull rings movably connected to the front and rear ends of the isolation rod, a fixed seat fixedly installed below one side of the base, a fixed frame fixedly connected to one side of the fixed seat, a movable frame provided between the fixed frame and the fixed seat, and the movable frame and the fixed seat being connected by an elastic mechanism, and guide portions for guiding the pull rod to pass through being provided at the front and rear ends of the movable frame and the fixed frame respectively; A support plate is fixedly connected to the upper surface of the movable frame, and a rotating disk is rotatably connected to the upper end of the support plate. The rotating disk and the operating rod slide in axial direction. An anti-vibration mechanism that restricts the rotation of the isolation rod is provided on one side of the rotating disk, and a friction mechanism that restricts the rotation of the rotating disk is provided on the upper surface of the fixed seat.

[0006] Preferably, a mounting crossbeam is fixedly connected to the lower end of the base, and a connecting frame is fixedly connected to one side of the lower surface of the mounting crossbeam, with one side surface of the connecting frame being fixedly connected to the fixed base.

[0007] Preferably, a plurality of horizontal connecting plates are fixedly connected to the upper surface of the fixing base, and one end of each horizontal connecting plate is fixedly connected to the edge of the fixing frame.

[0008] Preferably, the elastic mechanism includes a plurality of T-shaped posts that slide through one side surface of the fixed base, one end of each T-shaped post being fixedly connected to one side surface of the movable frame, and a compression spring being sleeved on the outer surface of each T-shaped post, the compression spring being located between the movable frame and the fixed base.

[0009] Preferably, the guide portion includes limiting blocks fixedly connected to the front and rear ends of the movable frame and the fixed frame, respectively. Each pair of limiting blocks at the front and rear ends forms a group, and the two limiting blocks in each group are symmetrically arranged about both sides. The lower end of the side where the two limiting blocks in each group are close to each other is provided with a downward slope, and the end corner of the two limiting blocks in each group is provided with an end slope. The upper surface of the limiting block is connected to an inclined guide plate through a reset mechanism, and the two inclined guide plates in each group are symmetrically arranged about both sides.

[0010] Preferably, the reset mechanism includes a fixed plate fixedly connected to the upper surface of the limiting block, a plurality of guide rods slidingly passing through the outer surface of the fixed plate, one end of the guide rod being fixedly connected to one side of the inclined guide plate, the other end of the guide rod being fixedly connected to a synchronization plate, a reset spring being sleeved on the outer surface of the guide rod, the reset spring being located between the fixed plate and the inclined guide plate, and a vertical guide plate being fixedly connected to the upper end of the inclined guide plate.

[0011] Preferably, the upper end of the support plate is fixedly connected to an arc-shaped rail, the edge of the rotating disk is provided with a connecting ring, the connecting ring is slidably embedded in the inner side of the arc-shaped rail, the friction mechanism includes a limiting frame fixedly connected to the upper surface of the fixed seat, a friction block is fixedly embedded at the upper end of one side surface of the limiting frame, a protrusion is provided on one side surface of the friction block, the side wall of the protrusion abuts against the surface of the rotating disk, and the side of the friction block abuts against the edge of the connecting ring.

[0012] Preferably, a spline shaft is provided at one end of the outer surface of the operating lever, and a spline sleeve is fixedly connected to the central shaft of the rotating disk, with the spline sleeve slidingly engaging with the spline shaft.

[0013] Preferably, the anti-seismic mechanism includes a connecting arm fixedly connected to the outer surface of the spline sleeve, and a concave seat fixedly connected to one side surface of the connecting arm, the concave seat being sleeved on the outer surface of the isolation tie rod.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention, through the guiding scheme at the guide part, can constrain the vertical sliding of the pull rod and the working head, ensuring that the working head smoothly embeds into the pull ring, improving the smoothness of operation, and can be adapted to the alignment and pulling operation of the pull rod; 2. This invention relies on the limiting effect of the friction mechanism and, in conjunction with the anti-vibration mechanism, can securely lock the isolation tie rod, effectively suppressing the swaying, vibration and loosening caused by wind, and extending the service life of the equipment; 3. The present invention can automatically release the isolation lever limit during the operation of the lever to avoid structural interference and pulling action. After the operation is completed, it automatically resets and locks, taking into account both the convenience of operation and normal seismic stability. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of a seismic-resistant primary and secondary integrated pole-mounted circuit breaker according to the present invention; Figure 2 This is a schematic diagram of the isolation tie rod of a seismic-resistant primary and secondary integrated pole-mounted circuit breaker according to the present invention; Figure 3 This is a schematic diagram of the mounting base of a seismic-resistant primary and secondary integrated pole-mounted circuit breaker according to the present invention; Figure 4 This invention relates to a seismic-resistant primary and secondary integrated pole-mounted circuit breaker. Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the rotating disk of a seismic-resistant primary and secondary integrated pole-mounted circuit breaker according to the present invention; Figure 6 This is a schematic diagram of the limiting block of a seismic-resistant primary and secondary integrated pole-mounted circuit breaker according to the present invention; Figure 7 This is a schematic diagram of the operation of the trip arm of a seismic-resistant primary and secondary integrated pole-mounted circuit breaker according to the present invention; Figure 8 This is a front view of the pull rod of a seismic-resistant primary and secondary integrated pole-mounted circuit breaker according to the present invention.

[0016] The components are as follows: 1. Pole post assembly; 2. Operating lever; 3. Isolation lever; 4. Connecting frame; 5. Fixed seat; 6. Moving frame; 7. Fixed frame; 8. Horizontal connecting plate; 9. T-shaped column; 10. Compression spring; 11. Limiting block; 12. Lower inclined surface; 13. End inclined surface; 14. Vertical guide plate; 15. Inclined guide plate; 16. Guide rod; 17. Synchronizing plate; 18. Return spring; 19. Fixed plate; 20. Support plate; 21. Arc rail; 22. Rotating disk; 23. Connecting ring; 24. Spline sleeve; 25. Spline shaft; 26. Connecting arm; 27. Concave seat; 28. Limiting frame; 29. ​​Friction block; 30. Protruding block; 31. Base; 32. Mounting crossbeam; 33. Pull ring; 34. Pull lever; 35. Working head. Detailed Implementation

[0017] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0018] like Figure 1 - Figure 8 The illustrated seismic-resistant primary and secondary integrated pole-mounted circuit breaker includes a pole assembly 1. A base 31 is located at the lower end of the pole assembly 1. An operating rod 2 is rotatably connected to one side of the pole assembly 1, and an isolating rod 3 is fixedly connected to one end of the operating rod 2. The pole assembly 1 integrates the core high-voltage switching components for vacuum arc extinguishing and insulation protection, providing fundamental support for the overall conductive arc extinguishing and insulation isolation. The base 31 serves as a load-bearing mounting base, providing a precise installation reference for the transmission and electrical control components. The inner end of the operating rod 2 is linked to the moving contact transmission crank arm of the vacuum arc extinguishing chamber in the pole assembly 1 to transmit torque and achieve the circuit breaker's opening and closing linkage action. This is a common structure in existing primary and secondary integrated pole-mounted circuit breakers and will not be elaborated further.

[0019] Pull rings 33 are movably connected to the front and rear ends of the isolation lever 3. A fixed seat 5 is fixedly installed on the lower side of one side of the base 31. A fixed frame 7 is fixedly connected to one side of the fixed seat 5. A movable frame 6 is provided between the fixed frame 7 and the fixed seat 5. The movable frame 6 and the fixed seat 5 are connected by an elastic mechanism. The front and rear ends of the movable frame 6 and the fixed frame 7 are respectively provided with guide parts for the pull lever 34 to pass through. A support plate 20 is fixedly connected to the upper surface of the movable frame 6. A rotating disk 22 is rotatably connected to the upper end of the support plate 20. The rotating disk 22 and the operating rod 2 slide along the axial direction. An anti-vibration mechanism that restricts the rotation of the isolation rod 3 is provided on one side of the rotating disk 22. A friction mechanism that restricts the rotation of the rotating disk 22 is provided on the upper surface of the fixed seat 5.

[0020] A mounting crossbeam 32 is fixedly connected to the lower end of the base 31. The mounting crossbeam 32 is horizontally arranged and structurally stable, effectively distributing the upper load. A connecting frame 4 is fixedly connected to one side of the lower surface of the mounting crossbeam 32. One side surface of the connecting frame 4 is fixedly connected to the fixing seat 5. The connecting frame 4 serves as a transition and structural reinforcement. Its outer end face is securely fixed to the fixing seat 5, ensuring that all components are tightly connected and firmly positioned. In use, the mounting crossbeam 32 is generally fixed to the surface of the column, serving as a load-bearing and pressure-distributing transitional installation structure for external components.

[0021] Several horizontal connecting plates 8 are fixedly connected to the upper surface of the fixed base 5, and one end of the horizontal connecting plate 8 is fixedly connected to the edge of the fixed frame 7. This achieves a reliable and tight connection, effectively improving the connection strength between the fixed base 5 and the fixed frame 7 and the overall structural stability.

[0022] The elastic mechanism includes several T-shaped posts 9 that slide through one side surface of the fixed base 5. One end of each T-shaped post 9 is fixedly connected to one side surface of the movable frame 6. The T-shaped posts 9 can slide back and forth. A compression spring 10 is fitted on the outer surface of each T-shaped post 9. The compression spring 10 is located between the movable frame 6 and the fixed base 5. The compression spring 10 can provide a continuous and stable force to the movable frame 6 through its own elasticity, ensuring that its reset function is reliably realized. When the T-shaped posts 9 slide through the fixed base 5, they can be locked at the end face by their large-diameter end. With the tightening and limiting of the compression spring 10, it is ensured that they will never fall out of the fixed base 5 during the reciprocating sliding process.

[0023] The guide unit includes limiting blocks 11 fixedly connected to the front and rear ends of the movable frame 6 and the fixed frame 7 respectively. Each pair of limiting blocks 11 at the front and rear ends forms a group, and the two limiting blocks 11 in each group are symmetrically arranged about the two sides. The lower end of the side of the two limiting blocks 11 in each group that is close to each other is provided with a downward slope 12. The end corner of the two limiting blocks 11 in each group is provided with an end slope 13 to facilitate the smooth introduction of the pull rod 34. The upper surface of the limiting block 11 is connected to the inclined guide plate 15 through the reset mechanism. The two inclined guide plates 15 in each group are symmetrically arranged about the two sides to guide the working head 35.

[0024] The reset mechanism includes a fixed plate 19 fixedly connected to the upper surface of the limiting block 11. Several guide rods 16 slide through the outer surface of the fixed plate 19. One end of the guide rod 16 is fixedly connected to one side of the inclined guide plate 15, and the other end of the guide rod 16 is fixedly connected to a synchronization plate 17. A reset spring 18 is sleeved on the outer surface of the guide rod 16. The reset spring 18 is located between the fixed plate 19 and the inclined guide plate 15. The reset spring 18 can achieve elastic adaptive yielding and instant reset. A vertical guide plate 14 is fixedly connected to the upper end of the inclined guide plate 15 to further improve the guiding accuracy and sliding stability when the working head 35 moves upward.

[0025] An arc-shaped rail 21 is fixedly connected to the upper end of the support plate 20, providing arc-shaped rotation limit support. A connecting ring 23 is provided on the edge of the rotating disk 22. The connecting ring 23 is slidably embedded in the inner side of the arc-shaped rail 21 and can rotate along the arc trajectory. The friction mechanism includes a limiting frame 28 fixedly connected to the upper surface of the fixed base 5. A friction block 29 is fixedly embedded at the upper end of one side surface of the limiting frame 28. A protruding block 30 is provided on one side surface of the friction block 29. The side wall of the protruding block 30 abuts against the surface of the rotating disk 22, and the side of the friction block 29 abuts against the edge of the connecting ring 23 to achieve stable friction limit. Both the friction block 29 and the protruding block 30 are made of high wear-resistant hard engineering plastic material, which has the characteristics of stable friction coefficient, anti-aging, and resistance to outdoor wind and rain erosion. This ensures that the friction damping is uniform and controllable when it is in contact with the rotating disk 22 and the connecting ring 23, achieving reliable limit and anti-slip rotation.

[0026] A splined shaft 25 is provided at one end of the outer surface of the operating lever 2, and a splined sleeve 24 is fixedly connected to the central shaft of the rotating disk 22. The splined sleeve 24 and the splined shaft 25 are in sliding engagement. This satisfies the requirements for flexible lateral sliding and can also achieve synchronous circumferential rotation, ensuring reliable linkage between the rotating disk 22 and the operating lever 2 without relative free spin deviation.

[0027] The seismic-resistant mechanism includes a connecting arm 26 fixedly connected to the outer surface of the spline sleeve 24. A concave seat 27 is fixedly connected to one side surface of the connecting arm 26. The concave seat 27 is sleeved on the outer surface of the isolation rod 3, which can limit and tighten the rotation direction of the isolation rod 3. Under normal conditions, it effectively restrains the swing of the isolation rod 3 and improves the seismic stability.

[0028] Further explanation is needed: There is no need for a tight fit between the adjacent limit blocks 11 on both sides. This ensures that the spring force of the compression spring 10 can function normally, allowing the rotating disk 22 to stably abut against the surface of the protruding block 30. Also, from the partial front view, it appears as follows... Figure 8 As shown, the limiting blocks 11 on both sides are not located directly below the pull ring 33, but are moderately offset to the side of the pull ring 33 away from the pole assembly 1. This offset structure design ensures that after the pull rod 34 is inserted into place, the central axis of the pull rod 34 and the central axis of the pull ring 33 tend to be on the same vertical front-back plane, thus achieving effective alignment guidance.

[0029] The user pushes the upper end of the lever 34 along the lower inclined surface 12 or the end inclined surface 13, entering between the two limit blocks 11. During the pushing process, the working head 35 is kept between the two limit blocks 11. The lever 34 continues to move upward, and the working head 35 is guided by the inclined guide plates 15 on both sides to reach the position between the two inclined guide plates 15. After continuing to move upward, it squeezes the two inclined guide plates 15 and moves upward along the two vertical guide plates 14, directly disengaging from the two vertical guide plates 14, as shown in the figure. Figure 7 , Figure 8 As shown, this process can guide the sliding movement of the lever 34 and the working head 35 in the vertical plane, ensuring that after the lever 34 moves upward into place, the working head 35 can be accurately embedded inside the pull ring 33, thereby reliably pulling the isolation lever 3 and ensuring smooth implementation of the electrical control operation.

[0030] Under the elastic force of the compression spring 10, the moving frame 6 and the support plate 20 tend to move to one side, ensuring that the rotating disk 22 abuts against the surface of the protruding block 30 and the connecting ring 23 abuts against the surface of the friction block 29, thereby achieving the function of frictional limiting of the rotating disk 22, and thus ensuring the stability of the position of the connecting arm 26 and the concave seat 27. The concave seat 27 plays the role of stabilizing the isolation rod 3, effectively avoiding the swinging vibration and loosening problems caused by wind disturbance of the isolation rod 3. The overall structural stability is stronger, which can significantly improve the long-term service life.

[0031] When the lever 34 is inserted between the two limiting blocks 11, the moving frame 6 moves laterally, causing the rotating disk 22 to move away from the protrusion 30. The spline sleeve 24 slides laterally along the surface of the spline shaft 25, and the concave seat 27 moves laterally away from the isolation lever 3, without interfering with the subsequent pulling of the isolation lever 3. During the pulling process, when the isolation lever 3 and the operating rod 2 rotate, the spline sleeve 24, the rotating disk 22, and the concave seat 27 all rotate synchronously around the central axis of the operating rod 2. When the lever 34 is removed, under the elastic force of the compression spring 10, when the moving frame 6 moves laterally to reset, the rotating disk 22 is again abutted and limited by the protrusion 30, and the concave seat 27 is again fitted onto the surface of the isolation lever 3 for limitation. Therefore, the anti-vibration stability effect can still be guaranteed.

[0032] Note that during use, the lever 34 is always used to pull the pull ring 33 at the higher position, and is guided by the limit blocks 11 on both sides below that position.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A seismic-resistant primary and secondary integrated pole-mounted circuit breaker, comprising a pole assembly (1), wherein a base (31) is provided at the lower end of the pole assembly (1), and an operating rod (2) is rotatably connected to one side of the pole assembly (1), characterized in that: One end of the operating lever (2) is fixedly connected to an isolation lever (3), and the front and rear ends of the isolation lever (3) are respectively movably connected to pull rings (33). A fixed seat (5) is fixedly installed on one side of the base (31), and a fixed frame (7) is fixedly connected to one side of the fixed seat (5). A movable frame (6) is provided between the fixed frame (7) and the fixed seat (5), and the movable frame (6) and the fixed seat (5) are connected by an elastic mechanism. The front and rear ends of the movable frame (6) and the fixed frame (7) are respectively provided with guide parts through which the pull lever (34) passes. The upper surface of the movable frame (6) is fixedly connected to a support plate (20), and the upper end of the support plate (20) is rotatably connected to a rotating disk (22). The rotating disk (22) and the operating rod (2) slide in axial direction. One side of the rotating disk (22) is provided with an anti-vibration mechanism to restrict the rotation of the isolation rod (3). The upper surface of the fixed seat (5) is provided with a friction mechanism to restrict the rotation of the rotating disk (22). The guide section includes limiting blocks (11) that are fixedly connected to the front and rear ends of the movable frame (6) and the fixed frame (7), respectively. Each pair of limiting blocks (11) at the front and rear ends forms a group, and the two limiting blocks (11) in each group are symmetrically arranged about the two sides. The lower end of the side of the two limiting blocks (11) in each group that are close to each other is provided with a lower inclined surface (12). The end corner of the two limiting blocks (11) in each group is provided with an end inclined surface (13). The upper surface of the limiting block (11) is connected to an inclined guide plate (15) through a reset mechanism. The two inclined guide plates (15) in each group are symmetrically arranged about the two sides. The upper end of the support plate (20) is fixedly connected to an arc-shaped rail (21), and the edge of the rotating disk (22) is provided with a connecting ring (23). The connecting ring (23) is slidably embedded in the inner side of the arc-shaped rail (21). The friction mechanism includes a limiting frame (28) fixedly connected to the upper surface of the fixed seat (5). A friction block (29) is fixedly embedded at the upper end of one side surface of the limiting frame (28). A protruding block (30) is provided on one side surface of the friction block (29). The side wall of the protruding block (30) abuts against the surface of the rotating disk (22), and the side of the friction block (29) abuts against the edge of the connecting ring (23).

2. The seismic-resistant primary and secondary integrated pole-mounted circuit breaker according to claim 1, characterized in that: The lower end of the base (31) is fixedly connected to the mounting crossbeam (32), and a connecting frame (4) is fixedly connected to one side of the lower surface of the mounting crossbeam (32). One side surface of the connecting frame (4) is fixedly connected to the fixing seat (5).

3. The seismic-resistant primary and secondary integrated pole-mounted circuit breaker according to claim 1, characterized in that: The upper surface of the fixed base (5) is fixedly connected with several horizontal connecting plates (8), and one end of the horizontal connecting plate (8) is fixedly connected to the edge of the fixed frame (7).

4. The seismic-resistant primary and secondary integrated pole-mounted circuit breaker according to claim 1, characterized in that: The elastic mechanism includes several T-shaped columns (9) that slide through one side surface of the fixed seat (5). One end of the T-shaped column (9) is fixedly connected to one side surface of the movable frame (6). A compression spring (10) is sleeved on the outer surface of the T-shaped column (9). The compression spring (10) is located between the movable frame (6) and the fixed seat (5).

5. The seismic-resistant primary and secondary integrated pole-mounted circuit breaker according to claim 1, characterized in that: The reset mechanism includes a fixed plate (19) fixedly connected to the upper surface of the limiting block (11). Several guide rods (16) slide through the outer surface of the fixed plate (19). One end of the guide rod (16) is fixedly connected to one side of the inclined guide plate (15), and the other end of the guide rod (16) is fixedly connected to a synchronization plate (17). A reset spring (18) is sleeved on the outer surface of the guide rod (16). The reset spring (18) is located between the fixed plate (19) and the inclined guide plate (15). A vertical guide plate (14) is fixedly connected to the upper end of the inclined guide plate (15).

6. The seismic-resistant primary and secondary integrated pole-mounted circuit breaker according to claim 1, characterized in that: A spline shaft (25) is provided at one end of the outer surface of the operating lever (2), and a spline sleeve (24) is fixedly connected to the central shaft of the rotating disk (22). The spline sleeve (24) and the spline shaft (25) are in sliding fit.

7. A seismic-resistant primary and secondary integrated pole-mounted circuit breaker according to claim 6, characterized in that: The anti-seismic mechanism includes a connecting arm (26) fixedly connected to the outer surface of the spline sleeve (24), and a concave seat (27) fixedly connected to one side surface of the connecting arm (26), and the concave seat (27) is sleeved on the outer surface of the isolation tie rod (3).

Images