Intelligent high-voltage switch cabinet valve linkage locking mechanism
By adopting a purely mechanical interlocking design in the intelligent high-voltage switchgear, reliable locking and unlocking of the valves are achieved through the interlocking hook rotation assembly and wire rope linkage. This solves the problems of valve jamming and ineffective linkage, extends service life, and reduces failure rate and operating costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING MEISHAN METALLURGY DEV
- Filing Date
- 2025-06-12
- Publication Date
- 2026-06-09
AI Technical Summary
In intelligent high-voltage switchgear, the valves are prone to jamming during the entry and exit of the circuit breaker, leading to damage. Furthermore, when the circuit breaker compartment door is closed, the valves and the circuit breaker's entry and exit are not linked, increasing the wear and jamming failure rate and making it impossible to detect and stop the electric chassis vehicle's movement in a timely manner.
It adopts a purely mechanical interlocking design, including a valve locking device and an unlocking device. Through the interlocking hook rotation assembly, valve lifting hook assembly, circuit breaker compartment door pressure plate assembly and roller rotation assembly, the valve can be reliably locked and unlocked by steel wire rope linkage, avoiding the valve from moving with the circuit breaker and unlocking only when the circuit breaker compartment door is opened.
It achieves reliable locking and unlocking of the valve, reduces wear and jamming failure rate, extends the service life of the circuit breaker chassis and valve propulsion mechanism, reduces failure rate and operation and maintenance costs, and ensures safety and ease of operation.
Smart Images
Figure CN224342811U_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of high-voltage electrical equipment technology, and in particular to a door linkage locking device for an intelligent high-voltage switchgear. Background Technology
[0002] Currently, with the development of smart mines, intelligent high-voltage switchgear is gradually being put into use. Among them, the intelligent high-voltage medium-voltage switchgear KYN28 is widely used. During intelligent remote control operation, the valves frequently become stuck and damaged during the circuit breaker's movement. In non-intelligent switchgear, the circuit breaker's movement is manually operated, so if the valve gets stuck, the operator can sense it and respond promptly. However, in intelligent switchgear, when the valve gets stuck, the operator cannot sense it and cannot stop the electric chassis from moving the circuit breaker in time, leading to valve damage. Furthermore, when the circuit breaker compartment door is closed, the valve opening and closing is meaningless in relation to the circuit breaker's movement; it only increases the probability of wear and jamming on the valve's drive mechanism. Summary of the Invention
[0003] This invention addresses the technical problems existing in the prior art by providing a door linkage locking mechanism for intelligent high-voltage switchgear. The solution has a simple and reasonable structure, is easy to operate, and realizes reliable locking and unlocking functions of the door latch mechanism of intelligent high-voltage switchgear.
[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: Intelligent high-voltage switchgear valve linkage locking device, characterized in that it includes: valve locking device, valve unlocking device and sheathed steel wire rope, wherein the valve locking device includes interlocking hook rotating assembly (A) and valve lifting hook assembly (B), the valve unlocking device includes circuit breaker compartment door pressure plate assembly (C) and roller rotating assembly (D), the interlocking hook rotating assembly (A) has two sets installed at the upper and lower ends of the vertical center line of the circuit breaker compartment back plate respectively, and the valve lifting hook assembly corresponding to the two sets of interlocking hook rotating assemblies (A) has two sets installed at the vertical center line of the upper and lower valves respectively, when the valve is fully opened, the hooks (2) of the upper and lower valve lifting hook assemblies are hooked with the rotating hooks (3) of the upper and lower interlocking hook rotating assemblies (A) respectively. The circuit breaker compartment door pressure plate assembly (C) is installed on the upper left inner side door lock lifting plate (32) of the circuit breaker compartment door. The roller rotating assembly (D) is installed on the upper left side plate of the circuit breaker compartment. When the circuit breaker compartment door is closed and locked, the edge of the pressure plate (29) of the circuit breaker compartment door pressure plate assembly (C) is in no pressure contact with the roller (24) of the roller rotating assembly (D). There are two sheathed steel wire ropes. One end of each steel wire rope is connected to the roller rotating assembly (D), and the other end is connected to the upper and lower interlocking hook rotating assembly (A) respectively.
[0005] The interlocking hook rotating assembly includes a rotating shaft (4), a rotating hook (3) connected to the rotating shaft, a rotating plate (6), a jig-shaped mounting plate (1) fixed to the rotating shaft, a deep groove ball bearing (5) and a bearing pressure plate (7), a positioning bolt (9) connected to the rotating plate and a compression spring (8).
[0006] The valve lifting hook assembly includes a hook (2) and an integral valve (12) connected to the hook. The valve (12) is pushed out by the circuit breaker, which drives the valve pushing mechanism scissor fork to move up and down to open and close the valve (12). When the circuit breaker compartment door is closed for the first time, and the circuit breaker is pushed into the working position by electric or manual means from the isolation test position, the valve (12) opens. The valve lifting hook (2) is hooked by the rotating hook (3) to achieve locking. At this time, no matter whether the circuit breaker moves from the working position to the isolation test position or from the isolation test position to the working position, as long as the door is not opened, the valve (12) will always be locked in the open position and will not move with the circuit breaker. Even if the intelligent switch cabinet electric chassis vehicle drives the circuit breaker to move frequently, the valve (12) will not move with it, thereby avoiding damage caused by wear and jamming of the valve (12) pushing mechanism. The valve latch will only be unlocked and released when the switch cabinet circuit breaker compartment door is opened by the user. The valve (12) is only needed to seal the live stationary contact (15) when the circuit breaker compartment door is opened.
[0007] The circuit breaker compartment door pressure plate assembly includes a pressure plate (29) and a circuit breaker compartment door lock upper and lower lifting plate (32) that is fixedly integrated with the pressure plate.
[0008] The roller rotating assembly includes a roller (24), a small pin (25) connected to the roller, a rotating L-shaped plate (23), a small rotating bushing and a rotating pin (22) connected to the rotating L-shaped plate (23), a gate-shaped mounting plate (21) connected to the small rotating bushing and the rotating pin (22), a perforated bolt (26) and a positioning pin (27) connected to the rotating L-shaped plate (23).
[0009] The pressure plate (29) can move up and down together with the upper and lower lifting plates (32) of the circuit breaker compartment door lock. When the circuit breaker compartment door lock is opened, the upper and lower lifting plates (32) of the door lock move down and drive the pressure plate (29) to press the roller (24), so that the rotating L-shaped plate (23) rotates and pulls the sheathed steel wire rope (28), thereby driving the rotating plate (6) to rotate. The rotating plate (6) and the rotating hook (3) are fixed on the rotating shaft, which in turn drives the rotating hook (3) to rotate, thereby triggering the release, unlocking the valve, releasing the valve (12), so that the valve (12) closes the live static contact (15), which meets the protection level requirements when opening.
[0010] Among them, the rotating pin (22) passes through the small rotating bushing that is integrally connected with the rotating L-shaped plate (23) and is installed on the gate-shaped mounting plate (21). The rotating L-shaped plate (23) can rotate with the rotating pin (22) as the axis. The gate-shaped mounting plate (21) is connected to the side plate (31) of the circuit breaker compartment by bolts.
[0011] The roller (24) and the rotating L-shaped plate (23) are connected by the roller connecting pin (25), and the roller (24) can rotate around the connecting pin (25).
[0012] The rotating hook (3) is connected to the rotating shaft (4) by screws.
[0013] The rotating plate (6) is connected to the rotating shaft (4) by screws.
[0014] The hook (2) and the valve (12) are connected by bolts.
[0015] Compared to existing technologies, the advantages of this invention are as follows: The intelligent high-voltage switchgear door interlocking device of this invention adopts a purely mechanical interlocking design, which is simple in structure, reliable in interlocking, and has low operation and maintenance costs. After installation, it can change the ineffective interlocking state of the existing switchgear circuit breaker entry / exit and door interlocking without modifying the original switchgear door propulsion mechanism. This completely solves the wear and jamming faults caused by ineffective movement of the door and door propulsion mechanism, effectively reduces the load resistance of the circuit breaker electric chassis, and significantly extends the service life of the circuit breaker chassis and door propulsion mechanism. This invention is convenient and easy to use. It does not require changes to the original operating procedures. The interlocking and unlocking operations of the intelligent high-voltage switchgear door can be automatically realized simply by closing and opening the circuit breaker compartment door lock. It avoids the safety risk of exposed live parts due to operator forgetfulness or negligence in unlocking, thus reducing the failure rate while ensuring safety protection functions. This invention is simple to install and debug, and can be easily implemented whether for new switchgear manufacturing or on-site modification of old switchgear. Attached Figure Description
[0016] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.
[0017] Figure 1 This is a schematic diagram of the overall arrangement of the various mechanisms of the present invention.
[0018] Figure 2 This is a schematic diagram of the overall structure of the valve locking mechanism of the present invention.
[0019] Figure 3 This is a schematic diagram of the overall mechanism of the valve unlocking mechanism of the present invention.
[0020] In the picture:
[0021] 1. Z-shaped mounting plate; 2. Hook head; 3. Rotating hook; 4. Rotating shaft; 5. Deep groove ball bearing; 6. Rotating plate; 7. Bearing pressure plate; 8. Compression spring; 9. Positioning bolt; 12. Valve; 13. Circuit breaker moving contact; 14. Contact box; 15. Stationary contact; 16. Circuit breaker compartment back plate; 17. Circuit breaker compartment upper and lower partitions; 21. Gate-shaped mounting plate; 22. Small rotating bushing and rotating pin; 23. Rotating L-shaped plate; 24. Roller; 25. Small pin; 26. Bolt with hole; 27. Positioning pin; 28. Wire rope; 29. Pressure plate; 30. Wire rope sheath; 31. Circuit breaker compartment side plate; 32. Door lock lifting plate. Detailed Implementation
[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.
[0023] Reference Figures 1 to 3 As shown, an intelligent high-voltage switchgear door linkage locking device of the present invention includes:
[0024] Overall layout diagram of each institution Figure 1 ; Valve locking device Figure 2 ; Valve unlocking device Figure 3 ; installed in the aforementioned door locking device Figure 2 and the aforementioned door unlocking device Figure 3 28. Steel wire rope with sheath.
[0025] Valve locking device Figure 2The system includes an interlocking hook rotating assembly A and a valve lifting hook assembly B. The interlocking hook rotating assembly A includes a rotating shaft 4, a rotating hook 3 connected to the rotating shaft, a rotating plate 6, a jig-shaped mounting plate 1 fixed to the rotating shaft, a deep groove ball bearing 5, and a bearing pressure plate 7. A positioning bolt 9 and a compression spring 8 are connected to the rotating plate. The valve lifting hook assembly B includes a hook head 2 and an integrally connected valve 12. The valve 12 is pushed out by a circuit breaker, which drives the valve pushing mechanism's scissor fork to move up and down, opening and closing. When the circuit breaker compartment door is closed for the first time, and the circuit breaker is pushed from the isolation test position to the working position electrically or manually, the valve 12 opens, and the valve lifting hook 2 is hooked by the rotating hook 3, achieving locking. At this time, regardless of whether the circuit breaker moves from the working position to the isolation test position or vice versa, as long as the door is not opened, the valve 12 remains locked in the moved position and does not move with the trolley. Even if the intelligent switchgear electric chassis trolley drives the circuit breaker to move frequently, the valve 12 will not move accordingly, thus avoiding damage caused by the valve 12 jamming. The valve latch will only be unlocked and released when the switchgear circuit breaker compartment door is manually opened, and the valve 12 is only needed to seal the live stationary contact 15 when the door is open.
[0026] Valve unlocking device Figure 3 The circuit breaker compartment door pressure plate assembly C and roller rotation assembly D are included. The circuit breaker compartment door pressure plate assembly C includes a pressure plate 29 and a circuit breaker compartment door lock upper and lower lifting plate 32 fixedly integrated with the pressure plate. The roller rotation assembly D includes a roller 24, a small pin 25 connected to the roller, a rotating L-shaped plate 23, a small rotating bushing and a rotating pin 22 connected to the rotating L-shaped plate 23, and a door-shaped mounting plate 21 connected to the rotating pin 22. The pressure plate 29 can move up and down together with the circuit breaker compartment door lock upper and lower lifting plate 32. When it moves down, it presses the rotating L-shaped plate 23 to rotate, pulling the steel wire rope 28 with a sheath tube, thereby driving the rotating plate 6 to rotate. The rotating plate 6 and the rotating hook 3 are fixed on the rotating shaft, which in turn drives the rotating hook head 3 to rotate, thereby triggering the release, unlocking the valve, and releasing the valve 12 so that the valve 12 closes the live static contact 15, meeting the protection level requirements when opening.
[0027] In some embodiments, the rotating L-shaped plate 23 and the small rotating bushing are hinged to the rotating pin-shaped mounting plate by a rotating pin 22.
[0028] In some embodiments, the roller 24 and the rotating L-shaped plate 23 are hinged by the roller connecting pin 25.
[0029] In some embodiments, the rotating hook 3 is connected to the rotating shaft 4 by screws.
[0030] In some embodiments, the rotating plate 6 is connected to the rotating shaft 4 by screws.
[0031] In some embodiments, the hook head 2 and the integrally connected valve 12 are bolted together.
[0032] In some embodiments, the pressure plate 29 is bolted to the upper and lower lifting plates 32 of the circuit breaker compartment door lock. In summary, the intelligent high-voltage switchgear door linkage locking device of the present invention adopts a reliable interlocking design and a simple structure, enabling intelligent operations such as safe remote control of the circuit breaker's entry, exit, opening, and closing after the circuit breaker compartment door is closed for the first time. Simultaneously, unlocking is achieved simply by opening the circuit breaker compartment door, resulting in high security, low operating costs, and reliable interlocking. This device requires minimal operating force, operates smoothly, and can accurately and effectively realize the interlocking and unlocking operations of the intelligent high-voltage switchgear door. Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all such modifications and substitutions should be covered within the scope of the claims of the present invention.
Claims
1. A smart high-voltage switchgear door linkage locking device, characterized in that, include: The system includes a valve locking device, a valve unlocking device, and a sheathed steel wire rope. The valve locking device comprises two sets of interlocking hook rotating assemblies (A) and two sets of valve lifting hook assemblies (B). The valve unlocking device comprises a circuit breaker compartment door pressure plate assembly (C) and a roller rotating assembly (D). The interlocking hook rotating assemblies (A) are respectively installed at the upper and lower ends of the vertical centerline of the circuit breaker compartment back plate. The valve lifting hook assemblies corresponding to the two sets of interlocking hook rotating assemblies (A) are respectively installed on the vertical centerlines of the upper and lower valves. When the valve is fully open, the hooks (2) of the upper and lower valve lifting hook assemblies are respectively connected to the door. The rotating hook (3) of the upper and lower interlocking hook rotating assembly (A) is hooked; the circuit breaker compartment door pressure plate assembly (C) is installed on the upper and lower lifting plate (32) of the upper left inner side door lock of the circuit breaker compartment door, and the roller rotating assembly (D) is installed on the upper left side plate of the circuit breaker compartment. When the circuit breaker compartment door is closed and locked, the edge of the pressure plate (29) of the circuit breaker compartment door pressure plate assembly (C) is in no pressure contact with the roller (24) of the roller rotating assembly (D); there are two sheathed steel wire ropes, one end of each steel wire rope is connected to the roller rotating assembly (D), and the other end is connected to the upper and lower interlocking hook rotating assembly (A) respectively.
2. The intelligent high-voltage switchgear door linkage locking device according to claim 1, characterized in that, The interlocking hook rotating assembly includes a rotating shaft (4), a rotating hook (3) connected to the rotating shaft, a rotating plate (6), a zig-shaped mounting plate (1) fixed to the rotating shaft, a deep groove ball bearing (5) and a bearing pressure plate (7), a positioning bolt (9) connected to the rotating plate and a compression spring (8).
3. The intelligent high-voltage switchgear door linkage locking device according to claim 1, characterized in that, The valve lifting hook assembly includes a hook (2) and an integral valve (12) connected to the hook. The valve (12) is pushed out by a circuit breaker, which drives the valve pushing mechanism scissor fork to move up and down.
4. The intelligent high-voltage switchgear door linkage locking device according to claim 1, characterized in that, The circuit breaker compartment door pressure plate assembly includes a pressure plate (29) and a circuit breaker compartment door lock upper and lower lifting plate (32) fixedly integrated with the pressure plate.
5. The intelligent high-voltage switchgear door linkage locking device according to claim 1, characterized in that, The roller rotating assembly includes a roller (24), a small pin (25) connected to the roller, a rotating L-shaped plate (23), a small rotating bushing and a rotating pin (22) connected to the rotating L-shaped plate (23), a gate-shaped mounting plate (21) connected to the small rotating bushing and the rotating pin (22), a perforated bolt (26) and a locating pin (27) connected to the rotating L-shaped plate (23).
6. The intelligent high-voltage switchgear door linkage locking device according to claim 1, characterized in that, The roller (24) and the rotating L-shaped plate (23) are connected by the roller connecting pin (25).
7. The intelligent high-voltage switchgear door linkage locking device according to claim 2, characterized in that, The rotating hook (3) is connected to the rotating shaft (4) by screws.
8. The intelligent high-voltage switchgear door linkage locking device according to claim 2, characterized in that, The rotating plate (6) is connected to the rotating shaft (4) by screws.
9. The intelligent high-voltage switchgear door linkage locking device according to claim 3, characterized in that, The hook (2) and the valve (12) are connected by bolts.