Modular assembled high-low voltage switch cabinet

Abstract

The application relates to the technical field of electrical equipment, and discloses a modular assembly type high-low voltage switch cabinet, which comprises a cabinet body, an end busbar module arranged on the cabinet body, a plurality of vertical busbar modules connected to the end busbar module, and a plurality of circuit breaker modules arranged in the cabinet body, wherein the plurality of circuit breaker modules are installed in the cabinet body along the height direction of the vertical busbar modules; the end busbar module, the vertical busbar modules and the plurality of circuit breaker modules are arranged in the cabinet body, so that each circuit breaker module can be independently arranged along the vertical busbar modules and correspondingly connected to the branch busbar seat and the side busbar end through a branch; meanwhile, a delay connection mechanism is arranged between the connecting box body and the side busbar end, so that the circuit breaker module can be guided, positioned and mechanically assembled in the installation process, and then the side busbar end is transversely slid to be pressure-connected with the corresponding branch busbar seat for conduction.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment technology, and specifically to a modular, assembled high and low voltage switchgear. Background Technology

[0002] High and low voltage switchgear is used for power distribution, control, and protection in power distribution systems. To improve production and assembly efficiency and ease of maintenance, existing switchgear is gradually adopting a modular structure, where circuit breaker modules, busbar modules, outgoing line modules, and cabinet frames are prefabricated separately and then assembled and installed inside the cabinet.

[0003] In this type of structure, the circuit breaker module typically needs to establish an electrical connection with the vertical busbar module inside the cabinet. Common methods include transition busbar connection, fixed busbar connection, or plug-in connection. These methods can meet basic conductivity requirements, but the mechanical installation of the circuit breaker module and the conductive connection of the busbar often occur simultaneously. During the process of pushing in, adjusting, or removing the circuit breaker module, the busbar connection ends also participate in contact or separation.

[0004] For prefabricated switchgear, the goal is not only to improve installation efficiency but also to enable independent assembly and disassembly of each functional module for easy maintenance. During installation, if the circuit breaker module has not yet completed its mechanical positioning before establishing conductive contact with the vertical busbar module, the conductive connection status will be affected by the module's installation posture, the direction of the pushing force, and positioning deviations, which is detrimental to safety control and connection status confirmation during installation. Therefore, existing modular switchgear still faces the problem of difficulty in coordinating the timing of the circuit breaker module's mechanical installation and the establishment of conductive connections. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a modular, assembled high and low voltage switchgear, which aims to alleviate the aforementioned problems to at least some extent.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: A modular, assembled high- and low-voltage switchgear includes: Cabinet; An end busbar module is provided on the cabinet, and multiple vertical busbar modules are connected to the end busbar module; Multiple circuit breaker modules are installed inside the cabinet, and the multiple circuit breaker modules are installed at intervals along the height direction of the vertical busbar module inside the cabinet; The vertical busbar module includes a connecting and conducting part, a vertical busbar row and a branch busbar seat. The vertical busbar row is arranged along the height direction of the cabinet. The connecting and conducting part is connected to the end busbar module. There are multiple branch busbar seats, each corresponding to a different circuit breaker module. The circuit breaker module is provided with a connection box, and the connection box has a side bus end that can slide laterally along the connection box. It also includes a delayed connection mechanism disposed between the connection box and the side bus end, the delayed connection mechanism being used to delay the conductive connection action between the side bus end and the corresponding branch bus seat after the mechanical installation action of the circuit breaker module relative to the cabinet.

[0007] Preferably, a connecting bracket is slidably connected inside the connecting box, the side busbar end is slidably connected to the connecting bracket, and a wire threading opening is provided on the connecting box.

[0008] Preferably, a top block is connected to the connecting box body, a wedge-shaped strip is connected to the side busbar end, and a first spring is connected between the side busbar end and the connecting bracket.

[0009] Preferably, when the circuit breaker module is not installed in the predetermined assembly position, the delayed connection mechanism restricts the side bus end from contacting and conducting with the corresponding branch bus seat; After the circuit breaker module is installed in the predetermined assembly position, the delayed connection mechanism drives the side bus end to slide laterally along the connection box, so that the side bus end is crimped and connected with the corresponding branch bus seat; The delayed connection mechanism includes a fixed shaft connected to the connection box body, a connection bracket slidably connected to the fixed shaft, a connection ring also provided on the fixed shaft, a second spring connected between the connection ring and the connection bracket, a damping mechanism provided between the connection bracket and the fixed shaft, a drive rod slidably connected to the connection box body, the drive rod extending to the outside of the connection box body, a reversing drive part provided between the drive rod and the connection ring, used to drive the connection ring to move towards the branch bus seat when the drive rod moves into the connection box body.

[0010] Preferably, the damping mechanism includes a lead screw fixedly connected to the fixed shaft, a connecting sleeve slidably connected to the fixed shaft, the connecting sleeve being connected to the connecting bracket, a threaded tube rotatably connected to the connecting sleeve and threadedly engaged with the lead screw, a plurality of paddles connected to the outer wall of the threaded tube, the paddles having through openings, and the connecting sleeve being filled with damping grease.

[0011] Preferably, the reversing drive unit includes a first connecting rod rotatably connected to the connecting box body, and second connecting rods that slide and cooperate with the first connecting rod at both ends. A connecting pipe is connected to the drive rod, one of the second connecting rods is hinged to the connecting pipe, and the other second connecting rod is hinged to the connecting ring.

[0012] Preferably, a piston shaft is connected to the connecting box body, and a first flow opening is provided on the piston shaft. A guide sleeve is slidably connected inside the first flow opening. The diameter of the opening at one end of the guide sleeve is larger than the diameter of the opening at the other end. Multiple second flow openings are provided on the outer wall of the guide sleeve. A third spring is connected between the guide sleeve and the first flow opening. A fourth spring is connected between the connecting box body and the connecting pipe. The connecting pipe is filled with damping grease.

[0013] Preferably, a partition is connected to the cabinet, the circuit breaker module is slidably connected to the partition, a limit opening is opened at the bottom of the circuit breaker module, a wedge-shaped limit strip is slidably connected to the partition, a pull plate is slidably connected to the bottom of the partition, a fifth spring is connected between the pull plate and the partition, a top strip is connected to the pull plate, a sixth spring is connected between the top strip and the partition, and a top contact opening corresponding to the top strip is opened on the wedge-shaped limit strip.

[0014] In summary, the present invention has the following main beneficial effects: This application incorporates end busbar modules, vertical busbar modules, and multiple circuit breaker modules within the cabinet. Each circuit breaker module can be independently arranged along the vertical busbar module and connected to its corresponding side busbar end via branch busbar seats. Simultaneously, a delayed connection mechanism is installed between the connection box and the side busbar end, ensuring that the circuit breaker module is guided, positioned, and mechanically assembled during installation before the side busbar end slides laterally and presses against the corresponding branch busbar seat for conductive connection. This prevents the side busbar end from prematurely contacting the branch busbar seat before the circuit breaker module is in place, reducing the impact of installation posture deviations on the conductive connection and improving the safety and controllability of the connection status during installation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is another schematic diagram of the overall structure of the present invention; Figure 3 This is another schematic diagram of the overall structure of the present invention; Figure 4 This is a schematic diagram of the circuit breaker module structure of the present invention; Figure 5 This is a schematic diagram of the connecting box structure of the present invention; Figure 6 This is a cross-sectional schematic diagram of the connecting box structure of the present invention; Figure 7 This is a cross-sectional schematic diagram of the fixed shaft structure of the present invention; Figure 8 yes Figure 7 Enlarged schematic diagram of the local structure at point A; Figure 9 This is a cross-sectional schematic diagram of the connecting pipe structure of the present invention; Figure 10 This is a cross-sectional schematic diagram of the partition structure of the present invention.

[0016] Figure label: 1. Cabinet; 2. End busbar module; 3. Vertical busbar module; 4. Circuit breaker module; 5. Connecting conductor; 6. Vertical busbar; 7. Branch busbar socket; 8. Connecting box; 9. Side busbar end; 10. Connecting bracket; 11. Threading opening; 12. Top block; 13. Wedge strip; 14. First spring; 15. Fixed shaft; 16. Connecting ring; 17. Second spring; 18. Drive rod; 19. Lead screw; 20. Connecting sleeve; 21. Threaded pipe; 22. Paddle; 23. Through port; 24. First connecting rod; 25. Second connecting rod; 26. Connecting pipe; 27. Piston shaft; 28. First flow opening; 29. ​​Guide sleeve; 30. Second flow opening; 31. Third spring; 32. Fourth spring; 33. Partition; 34. Limiting opening; 35. Wedge-shaped limiting strip; 36. Pulling plate; 37. Fifth spring; 38. Top bar; 39. Sixth spring; 40. Top contact opening. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] refer to Figures 1-10 This embodiment provides a modular, assembled high- and low-voltage switchgear, including a cabinet 1, end busbar modules 2, multiple vertical busbar modules 3, and multiple circuit breaker modules 4. The cabinet 1 forms the mounting base for each module. The end busbar modules 2 are mounted on the cabinet 1 and serve as the upper-level conductive connection structure for each vertical busbar module 3 within the cabinet 1. Multiple vertical busbar modules 3 are respectively connected to the end busbar modules 2, enabling the end busbar modules 2 to distribute electrical energy to different vertical busbar modules 3. Multiple circuit breaker modules 4 are located within the cabinet 1 and are spaced apart along the height of the vertical busbar modules 3, so that each circuit breaker module 4 corresponds to an independent access position.

[0019] The vertical busbar module 3 includes a connecting and conducting part 5, a vertical busbar 6, and branch busbar seats 7. The connecting and conducting part 5 connects the end busbar module 2 and the vertical busbar 6, and is used to conduct electrical energy from the end busbar module 2 to the vertical busbar 6. The vertical busbar 6 extends along the height direction of the cabinet 1 and serves as the common power supply busbar for the circuit breaker modules 4. There are multiple branch busbar seats 7, which are spaced apart along the extension direction of the vertical busbar 6 and correspond to each circuit breaker module 4. Each branch busbar seat 7 is electrically connected to the vertical busbar 6 to establish a branch conductive connection with the corresponding circuit breaker module 4.

[0020] The circuit breaker module 4 is equipped with a connecting box 8, and a side busbar end 9 is located inside the connecting box 8. The side busbar end 9 can slide laterally along the connecting box 8. A delay connection mechanism is provided between the connecting box 8 and the side busbar end 9. The delay connection mechanism controls the lateral sliding of the side busbar end 9, ensuring that the conductive connection between the side busbar end 9 and the branch busbar seat 7 lags behind the mechanical installation of the circuit breaker module 4 relative to the cabinet 1. Specifically, during the process of pushing or installing the circuit breaker module 4 into the cabinet 1, the delay connection mechanism holds the side busbar end 9 in the retracted position, maintaining a gap between the side busbar end 9 and the corresponding branch busbar seat 7. This allows the circuit breaker module 4 to complete its guiding, positioning, and mechanical installation before prematurely contacting and connecting with the branch busbar seat 7 before reaching its final position.

[0021] After the circuit breaker module 4 is installed in its predetermined assembly position within the cabinet 1, the mechanical positioning relationship between the circuit breaker module 4 and the cabinet 1 is established, and the side busbar end 9 and the corresponding branch busbar seat 7 are also in a mutually aligned position. At this time, the delayed connection mechanism releases the restriction on the side busbar end 9 and drives the side busbar end 9 to slide laterally along the connecting box 8, causing the side busbar end 9 to move towards the corresponding branch busbar seat 7 until the crimping contact surface of the side busbar end 9 is pressed tightly against the conductive contact surface of the branch busbar seat 7, thereby establishing a conductive connection after the circuit breaker module 4 is mechanically installed in place.

[0022] Through the above structure, the end busbar module 2, the vertical busbar module 3 and multiple circuit breaker modules 4 can form a modular arrangement; at the same time, the delayed connection mechanism allows the circuit breaker module 4 to complete mechanical installation first, and then move laterally from the side busbar end 9 to press and connect with the branch busbar seat 7, thereby coordinating the mechanical positioning and conductive connection timing during the installation process and improving the controllability of the circuit breaker module 4 installation process.

[0023] Based on the above embodiment, a connecting bracket 10 is slidably connected inside the connecting box 8, and the side busbar end 9 is slidably connected to the connecting bracket 10. A wire threading opening 11 is provided on the connecting box 8.

[0024] The connecting bracket 10 serves as a support for the side busbar end 9. When the delayed connection mechanism operates, the connecting bracket 10 first moves, causing the side busbar end 9 to move towards the branch busbar seat 7. The side busbar end 9 moves from its retracted position to a position close to the branch busbar seat 7. The side busbar end 9 also serves as a secondary crimping member, continuing to slide relative to the connecting bracket 10 after it has moved to the predetermined position, thus forming a crimped connection with the branch busbar seat 7.

[0025] By mounting the side busbar end 9 on the sliding connecting bracket 10, the conductive connection process can be divided into two stages: in the first stage, the connecting bracket 10 drives the side busbar end 9 to move as a whole, which is used to achieve the approach action after the circuit breaker module 4 is installed in place; in the second stage, the side busbar end 9 slides relative to the connecting bracket 10 to complete the final crimping action. This avoids the side busbar end 9 from prematurely contacting the branch busbar seat 7 before the circuit breaker module 4 is installed stably, and the crimping is performed after alignment, which helps to improve the controllability of the connection during the installation process.

[0026] The wiring opening 11 on the connecting box 8 is used for the connection line between the side bus end 9 and the internal conductive end of the circuit breaker module 4 to pass through.

[0027] Based on the above embodiment, a top block 12 is connected to the connecting box 8, a wedge-shaped strip 13 is connected to the side busbar end 9, and a first spring 14 is connected between the side busbar end 9 and the connecting bracket 10. The top block 12 is fixed inside the connecting box 8 and is located on the moving path of the wedge-shaped strip 13; the wedge-shaped strip 13 moves synchronously with the side busbar end 9, and a guide slope is formed on the wedge-shaped strip 13. The first spring 14 is used to keep the side busbar end 9 in the initial retraction position relative to the connecting bracket 10, so that the connecting bracket 10 can first drive the side busbar end 9 to move closer to the branch busbar seat 7 in the initial movement stage, while the side busbar end 9 does not immediately generate a pressing displacement relative to the connecting bracket 10.

[0028] Specifically, after the circuit breaker module 4 is installed to the predetermined assembly position, the delayed connection mechanism pushes the connecting bracket 10 to move laterally along the connecting box 8. At this time, the side busbar end 9 is held in its initial position on the connecting bracket 10 under the action of the first spring 14, and moves synchronously with the connecting bracket 10, so that the side busbar end 9 gradually approaches the corresponding branch busbar seat 7. When the connecting bracket 10 moves to the predetermined position, the guide slope of the wedge-shaped bar 13 contacts the top block 12 on the connecting box 8, and the top block 12 pushes the wedge-shaped bar 13, so that the side busbar end 9 overcomes the elastic force of the first spring 14 and continues to slide relative to the connecting bracket 10, thereby making the pressing surface of the side busbar end 9 fit and press tightly against the conductive contact surface of the branch busbar seat 7.

[0029] Therefore, the displacement of the connecting bracket 10 is used to complete the approach action of the side busbar end 9, and the cooperation between the top block 12 and the wedge strip 13 is used to trigger the secondary crimping action of the side busbar end 9 after it approaches the position. This structure allows the side busbar end 9 to remain retracted before the circuit breaker module 4 is installed in place or the connecting bracket 10 is moved into place, and then crimping and connecting are performed after the side busbar end 9 is aligned with the branch busbar seat 7, thereby achieving a delayed coordination between the mechanical installation action and the conductive connection action.

[0030] Based on the above embodiments, the delayed connection mechanism includes a fixed shaft 15 connected within the connection housing 8, and a connecting bracket 10 slidably connected to the fixed shaft 15, allowing the connecting bracket 10 to move within the connection housing 8 along the axial direction of the fixed shaft 15. A connecting ring 16 is also sleeved on the fixed shaft 15, and the connecting ring 16 can slide relative to the fixed shaft 15. A second spring 17 connects the connecting ring 16 and the connecting bracket 10. The second spring 17 creates elastic traction between the connecting ring 16 and the connecting bracket 10, so that after the connecting ring 16 is displaced, the second spring 17 can delay the movement of the connecting bracket 10.

[0031] A damping mechanism is provided between the connecting bracket 10 and the fixed shaft 15. The damping mechanism provides damping for the sliding of the connecting bracket 10 along the fixed shaft 15. Therefore, when the connecting ring 16 is driven by the reversing drive unit and moves towards the branch busbar seat 7, the connecting bracket 10 will not maintain synchronous displacement with the connecting ring 16 under the damping effect of the damping mechanism. The displacement of the connecting ring 16 stretches the second spring 17. Subsequently, the second spring 17 continuously applies a traction force to the connecting bracket 10 towards the branch busbar seat 7. Under the combined action of this traction force and the damping mechanism, the connecting bracket 10 moves with a delay along the fixed shaft 15 towards the branch busbar seat 7.

[0032] A drive rod 18 is slidably connected to the connecting box 8, with one end of the drive rod 18 extending to the outside of the connecting box 8. A reversing drive is provided between the drive rod 18 and the connecting ring 16. The reversing drive is used to convert the retraction action of the drive rod 18 relative to the connecting box 8 into the movement of the connecting ring 16 toward the branch busbar seat 7. Specifically, during the process of installing the circuit breaker module 4 into the cabinet 1, the extended end of the drive rod 18 first contacts the vertical busbar module 3. The drive rod 18 is restricted by the vertical busbar module and stops moving forward with the connecting box 8. As the circuit breaker module 4 continues to move toward the predetermined assembly position, the connecting box 8 continues to move forward relative to the drive rod 18, causing the drive rod 18 to retract inward relative to the connecting box 8.

[0033] When the drive rod 18 retracts into the connecting box 8, the reversing drive unit drives the connecting ring 16 to move along the fixed shaft 15 toward the branch busbar seat 7. At this time, due to the damping mechanism between the connecting bracket 10 and the fixed shaft 15, the movement of the connecting bracket 10 lags behind the movement of the connecting ring 16, and the connecting ring 16 first stretches the second spring 17. After the elastic tension of the second spring 17 gradually overcomes the damping of the connecting bracket 10 by the damping mechanism, the connecting bracket 10 slowly moves along the fixed shaft 15 toward the branch busbar seat 7, and drives the side busbar end 9 provided on the connecting bracket 10 to gradually approach the corresponding branch busbar seat 7.

[0034] After the connecting bracket 10 moves to the predetermined position, the side busbar end 9 and the branch busbar seat 7 are in a position of mutual alignment or near contact. At this time, the side busbar end 9 can continue to slide relative to the connecting bracket 10, and with the cooperation of the top block 12 and the wedge strip 13, the final crimping is completed, so that the side busbar end 9 and the branch busbar seat 7 are in close contact and conduction. Thus, the compression return action of the drive rod 18 does not directly cause the side busbar end 9 to immediately contact the branch busbar seat 7, but first a delayed traction is formed by the connecting ring 16 and the second spring 17, and then the connecting bracket 10 slowly moves under the action of the damping mechanism, thereby realizing the delayed process of establishing a conductive connection after the circuit breaker module 4 is mechanically installed in place.

[0035] In this way, the individual circuit breaker module 4 is kept in an orderly manner separated from the vertical busbar module 3 during installation, reducing hard scraping and unintended contact between the side busbar end 9 and the branch busbar seat 7.

[0036] Based on the above embodiments, the damping mechanism includes a lead screw 19 fixedly connected within a fixed shaft 15, a connecting sleeve 20 slidably connected within the fixed shaft 15, the connecting sleeve 20 being connected to a connecting bracket 10, and a threaded tube 21 rotatably connected within the connecting sleeve 20, the threaded tube 21 being threadedly engaged with the lead screw 19. The fixed shaft 15 has a hollow structure, and a guide groove extending axially can be formed on the side wall of the fixed shaft 15. The connecting sleeve 20 is connected to the connecting bracket 10 by passing through the guide groove, so that when the connecting bracket 10 slides along the fixed shaft 15, it can drive the connecting sleeve 20 to move synchronously along the fixed shaft 15.

[0037] The threaded tube 21 is located inside the connecting sleeve 20 and can rotate relative to the connecting sleeve 20. When the connecting bracket 10 moves along the fixed shaft 15 towards the branch busbar seat 7 under the traction of the second spring 17, the connecting bracket 10 drives the connecting sleeve 20 to move synchronously. Since the lead screw 19 is fixed inside the fixed shaft 15 and the threaded tube 21 is threadedly engaged with the lead screw 19, when the connecting sleeve 20 moves axially along the lead screw 19, the threaded tube 21 rotates relative to the connecting sleeve 20 under the action of the threaded engagement. In this way, the linear sliding of the connecting bracket 10 is converted into the rotational motion of the threaded tube 21.

[0038] Multiple levers 22 are connected to the outer wall of the threaded pipe 21, and the connecting sleeve 20 is filled with damping grease. When the threaded pipe 21 rotates, the multiple levers 22 rotate with the threaded pipe 21 in the damping grease. The damping grease generates flow resistance on the levers 22, thereby damping the rotation of the threaded pipe 21. Since the rotation of the threaded pipe 21 is also constrained by the threaded engagement between the lead screw 19 and the threaded pipe 21, this rotational damping will act in the opposite direction on the axial movement of the connecting sleeve 20, preventing the connecting sleeve 20 and the connecting bracket 10 from rushing towards the branch busbar seat 7 under the traction of the second spring 17, but instead moving towards the branch busbar seat 7 at a damped controlled speed.

[0039] The lever 22 has a passage 23. The passage 23 allows damping grease to pass through when the lever 22 rotates, enabling the damping grease to flow on both sides of the lever 22. By providing the passage 23, the lever 22 can be prevented from completely blocking the damping grease, which would make it difficult for the connecting bracket 10 to move. At the same time, the flow resistance generated when the damping grease passes through the passage 23 can still be used to provide stable damping for the rotation of the threaded tube 21 and the displacement of the connecting bracket 10. The number, diameter, and distribution of the passages 23 can be set according to the required delay time of the connecting bracket 10.

[0040] During the installation of circuit breaker module 4, the drive rod 18 retracts relative to the connecting box 8 and drives the connecting ring 16 to move towards the branch busbar seat 7 via the reversing drive unit. The connecting ring 16 first applies a traction force to the connecting bracket 10 via the second spring 17. After being pulled, the connecting bracket 10 moves along the fixed shaft 15, and drives the connecting sleeve 20 to move. When the connecting sleeve 20 moves, the threaded tube 21 rotates under the action of the lead screw 19, and the paddle 22 agitates the damping grease inside the connecting sleeve 20, forming damping on the movement of the connecting bracket 10. As a result, the moving speed of the connecting bracket 10 is limited, so that the side busbar end 9 gradually approaches the branch busbar seat 7 after the circuit breaker module 4 is mechanically installed in place, realizing a delay in the conductive connection action relative to the mechanical installation action.

[0041] Based on the above embodiment, the reversing drive unit includes a first connecting rod 24 rotatably connected within the connecting housing 8. Second connecting rods 25 are respectively provided at both ends of the first connecting rod 24, and the second connecting rods 25 and the first connecting rod 24 are capable of relative sliding. A connecting pipe 26 is connected to the drive rod 18. One of the second connecting rods 25 is hinged to the connecting pipe 26, and the other second connecting rod 25 is hinged to the connecting ring 16. The first connecting rod 24 is used to change the direction of force on the connecting pipe 26, so that the movement of the connecting pipe 26 can be transmitted to the connecting ring 16 via the second connecting rod 25 and the first connecting rod 24, thereby driving the connecting ring 16 to move along the fixed shaft 15 towards the branch busbar seat 7.

[0042] Specifically, during the installation of circuit breaker module 4, the connecting pipe 26 is displaced relative to the connecting box 8 under external forces. The connecting pipe 26 drives the second connecting rod 25, which is hinged to it, to move. This second connecting rod 25 further drives the first connecting rod 24 to rotate around the pivot. When the first connecting rod 24 rotates, its other end drives the connecting ring 16 to move along the fixed shaft 15 towards the branch busbar seat 7 via another second connecting rod 25. After the connecting ring 16 moves, it stretches the second spring 17. Because a damping mechanism is provided between the connecting bracket 10 and the fixed shaft 15, the connecting bracket 10 will not move synchronously with the connecting ring 16, but will move with a delay under the traction of the second spring 17 and the damping action of the damping mechanism.

[0043] Therefore, the reversing drive unit can convert the displacement of the connecting pipe 26 into the displacement of the connecting ring 16, and through the cooperation of the connecting ring 16, the second spring 17 and the damping mechanism, the connecting bracket 10 drives the side bus end 9 to approach the branch bus seat 7 with a delay. After the connecting bracket 10 moves to the predetermined position, the side bus end 9 slides relative to the connecting bracket 10 and presses against the branch bus seat 7 to conduct electricity, thereby realizing the establishment of a conductive connection after the mechanical installation of the circuit breaker module 4 is completed.

[0044] Based on the above embodiment, a piston shaft 27 is connected to the connecting housing 8, and a connecting tube 26 is sleeved on the outside of the piston shaft 27 and can slide relative to the piston shaft 27. The connecting tube 26 is filled with damping grease. A first flow opening 28 is provided on the piston shaft 27, and a guide sleeve 29 is slidably connected inside the first flow opening 28. The diameter of the opening at one end of the guide sleeve 29 is larger than the diameter of the opening at the other end. Multiple second flow openings 30 are provided on the outer wall of the guide sleeve 29, and a third spring 31 is connected between the guide sleeve 29 and the first flow opening 28. A fourth spring 32 is connected between the connecting housing 8 and the connecting tube 26. The fourth spring 32 is used to provide a resetting force to the connecting tube 26 to the outside of the connecting housing 8.

[0045] During the installation of circuit breaker module 4, connecting pipe 26 is subjected to abutment and slides inward relative to connecting box 8. At this time, damping grease in connecting pipe 26 flows through first flow opening 28 in the first direction and pushes guide sleeve 29 to first guide position. At the first guide position, the large end of guide sleeve 29 and the second flow opening 30 on the outer wall of guide sleeve 29 jointly participate in guiding the flow, giving the damping grease a large flow cross-section. Due to the low flow resistance of damping grease, connecting pipe 26 can smoothly retract into connecting box 8, thereby timely driving connecting ring 16 to move towards branch bus seat 7 via reversing drive.

[0046] After the connecting ring 16 is displaced, it stretches the second spring 17, while the connecting bracket 10 is subjected to the damping mechanism, and its displacement lags behind that of the connecting ring 16. At this time, the connecting ring 16 needs to maintain the traction position for a period of time so that the second spring 17 can continuously pull the connecting bracket 10 to move towards the branch busbar seat 7. If the connecting pipe 26 immediately extends and resets under the action of the fourth spring 32, the connecting ring 16 will return to its original position in the reverse direction via the reversing drive. The traction force will be released before the connecting bracket 10 has moved to the predetermined position, and the side busbar end 9 will find it difficult to stably complete the subsequent crimping action. Therefore, when the connecting pipe 26 extends outward in the reverse direction under the action of the fourth spring 32, the damping grease in the connecting pipe 26 flows through the first flow opening 28 in the second direction and moves the guide sleeve 29 to the second guide position. In the second guide position, the damping grease mainly flows through the small end of the guide sleeve 29, and the effective guide area of ​​the second flow opening 30 is reduced, making the flow cross section of the damping grease smaller than the flow cross section when the connecting pipe 26 slides inward. As a result, the connecting tube 26 experiences significant damping when resetting outwards, thus reducing the reset speed.

[0047] Through the above configuration, the guide sleeve 29 forms a unidirectional differential damping with low resistance in the installation trigger direction and high resistance in the disassembly reset direction. The low resistance in the installation trigger direction allows the connecting pipe 26 to retract smoothly when the circuit breaker module 4 is installed, without affecting the circuit breaker module 4 entering the predetermined assembly position, and enabling timely displacement of the connecting ring 16 via the commutation drive unit. The high resistance in the disassembly reset direction prevents the connecting pipe 26 from popping out instantaneously when reset outward under the action of the fourth spring 32, thereby avoiding rapid retraction of the commutation drive unit, connecting ring 16, and connecting bracket 10. Thus, in the initial stage of disassembly of the circuit breaker module 4, the side bus end 9 can detach from the branch bus seat 7 at a controlled speed, reducing the instantaneous impact between the side bus end 9 and the branch bus seat 7.

[0048] Based on the above embodiment, a partition 33 is connected to the cabinet 1, and the circuit breaker module 4 is slidably connected to the partition 33. The partition 33 serves to form a support and guiding foundation for the circuit breaker module 4, allowing the circuit breaker module 4 to be pushed into a predetermined assembly position within the cabinet 1 along the partition 33. A limiting opening 34 is provided at the bottom of the circuit breaker module 4, which is used to cooperate with the wedge-shaped limiting strip 35 on the partition 33 after the circuit breaker module 4 is installed in place.

[0049] A wedge-shaped limiting strip 35 is slidably connected to the partition 33. The wedge-shaped limiting strip 35 can move towards or away from the bottom of the circuit breaker module 4. The upper end of the wedge-shaped limiting strip 35 forms a wedge-shaped guide surface. When the circuit breaker module 4 is pushed in along the partition 33, the bottom of the circuit breaker module 4 first contacts the wedge-shaped guide surface and pushes the wedge-shaped limiting strip 35 back into the partition 33. After the circuit breaker module 4 moves to the predetermined assembly position, the limiting opening 34 at the bottom of the circuit breaker module 4 corresponds to the wedge-shaped limiting strip 35. Under the elastic action, the wedge-shaped limiting strip 35 enters the limiting opening 34, thereby restricting the circuit breaker module 4 from sliding in the withdrawal direction and realizing the locking of the circuit breaker module 4 into position.

[0050] A pull plate 36 is slidably connected to the bottom of the partition 33, and a fifth spring 37 is connected between the pull plate 36 and the partition 33. The fifth spring 37 is used to keep the pull plate 36 in its initial position and to drive the pull plate 36 to reset after the external force is released. A top bar 38 is connected to the pull plate 36, and a sixth spring 39 is connected between the top bar 38 and the partition 33. The sixth spring 39 is used to keep the top bar 38 tending to cooperate with the wedge-shaped limiting bar 35. The wedge-shaped limiting bar 35 has a corresponding top contact opening 40 for the top bar 38, and the top bar 38 can extend into or abut against the top contact opening 40.

[0051] When it is necessary to disassemble the circuit breaker module 4, the operator pulls the pull plate 36. The pull plate 36 slides relative to the partition 33, causing the top bar 38 to move synchronously. During the movement, the top bar 38 acts on the top contact opening 40 of the wedge-shaped limiting bar 35, causing the wedge-shaped limiting bar 35 to retract away from the bottom of the circuit breaker module 4 until the wedge-shaped limiting bar 35 exits the limiting opening 34 at the bottom of the circuit breaker module 4. At this time, the wedge-shaped limiting bar 35 no longer restricts the circuit breaker module 4, and the circuit breaker module 4 can slide out of the cabinet 1 along the partition 33.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular, assembled high- and low-voltage switchgear, characterized in that, include: Cabinet (1); An end busbar module (2) is provided on the cabinet (1), and multiple vertical busbar modules (3) are connected to the end busbar module (2). Multiple circuit breaker modules (4) are installed inside the cabinet (1), and the multiple circuit breaker modules (4) are installed at intervals in the cabinet (1) along the height direction of the vertical busbar module (3); The vertical busbar module (3) includes a connecting transmission part (5), a vertical busbar row (6) and a branch busbar seat (7). The vertical busbar row (6) is arranged along the height direction of the cabinet (1). The connecting transmission part (5) is connected to the end busbar module (2). There are multiple branch busbar seats (7), which are respectively arranged for each of the circuit breaker modules (4). The circuit breaker module (4) is provided with a connecting box (8), and the connecting box (8) is provided with a side bus end (9), which can slide laterally along the connecting box (8); It also includes a delayed connection mechanism located between the connection box (8) and the side bus end (9), the delayed connection mechanism being used to make the conductive connection action of the side bus end (9) and the corresponding branch bus seat (7) lag behind the mechanical installation action of the circuit breaker module (4) relative to the cabinet (1).

2. The modular, assembled high and low voltage switchgear according to claim 1, characterized in that, A connecting bracket (10) is slidably connected inside the connecting box (8), and the side busbar end (9) is slidably connected to the connecting bracket (10). A wire-passing opening (11) is provided on the connecting box (8).

3. A modular, assembled high- and low-voltage switchgear according to claim 2, characterized in that, A top block (12) is connected to the connecting box (8), a wedge strip (13) is connected to the side busbar end (9), and a first spring (14) is connected between the side busbar end (9) and the connecting bracket (10).

4. A modular, assembled high- and low-voltage switchgear according to claim 2, characterized in that, When the circuit breaker module (4) is not installed in the predetermined assembly position, the delayed connection mechanism restricts the side bus end (9) from contacting and conducting with the corresponding branch bus seat (7); After the circuit breaker module (4) is installed in the predetermined assembly position, the delayed connection mechanism drives the side bus end (9) to slide laterally along the connection box (8), so that the side bus end (9) is pressed and connected with the corresponding branch bus seat (7); The delayed connection mechanism includes a fixed shaft (15) connected inside the connection box (8), a connection bracket (10) slidably connected to the fixed shaft (15), a connection ring (16) is also provided on the fixed shaft (15), a second spring (17) is connected between the connection ring (16) and the connection bracket (10), a damping mechanism is provided between the connection bracket (10) and the fixed shaft (15), a drive rod (18) is slidably connected to the connection box (8), the drive rod (18) extends to the outside of the connection box (8), a reversing drive part is provided between the drive rod (18) and the connection ring (16), which is used to drive the connection ring (16) to move towards the branch bus seat (7) when the drive rod (18) moves into the connection box (8).

5. A modular, assembled high- and low-voltage switchgear according to claim 4, characterized in that, The damping mechanism includes a lead screw (19) fixedly connected to the fixed shaft (15), a connecting sleeve (20) slidably connected to the fixed shaft (15), the connecting sleeve (20) being connected to the connecting bracket (10), a threaded tube (21) rotatably connected to the connecting sleeve (20) and threadedly engaged with the lead screw (19), a plurality of paddles (22) being connected to the outer wall of the threaded tube (21), a through port (23) being provided on the paddles (22), and the connecting sleeve (20) being filled with damping grease.

6. A modular, assembled high- and low-voltage switchgear according to claim 4, characterized in that, The reversing drive unit includes a first connecting rod (24) rotatably connected to the connecting box (8). The two ends of the first connecting rod (24) are respectively provided with second connecting rods (25) that slide with the first connecting rod (24). A connecting pipe (26) is connected to the drive rod (18). One of the second connecting rods (25) is hinged to the connecting pipe (26), and the other second connecting rod (25) is hinged to the connecting ring (16).

7. A modular, assembled high- and low-voltage switchgear according to claim 6, characterized in that, A piston shaft (27) is connected to the connecting box (8). A first flow opening (28) is provided on the piston shaft (27). A flow guide sleeve (29) is slidably connected inside the first flow opening (28). The diameter of the opening at one end of the flow guide sleeve (29) is larger than the diameter of the opening at the other end. A plurality of second flow openings (30) are provided on the outer wall of the flow guide sleeve (29). A third spring (31) is connected between the flow guide sleeve (29) and the first flow opening (28). A fourth spring (32) is connected between the connecting box (8) and the connecting pipe (26). The connecting pipe (26) is filled with damping grease.

8. A modular, assembled high- and low-voltage switchgear according to claim 1, characterized in that, The cabinet (1) is connected to a partition (33), the circuit breaker module (4) is slidably connected to the partition (33), the bottom of the circuit breaker module (4) has a limit opening (34), the partition (33) is slidably connected to a wedge-shaped limit strip (35), the bottom of the partition (33) is slidably connected to a pull plate (36), the pull plate (36) and the partition (33) are connected to a fifth spring (37), the pull plate (36) is connected to a top strip (38), the top strip (38) and the partition (33) are connected to a sixth spring (39), and the wedge-shaped limit strip (35) has a top contact opening (40) corresponding to the top strip (38).

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