Interlocking device for high voltage cabinet

Abstract

This application relates to the field of high-voltage equipment safety technology, and in particular to an interlocking device for a high-voltage switchgear. The device includes a protective cover, a first rotating plate, a second rotating plate, a third rotating plate, and a linkage rod, all installed on the back of the high-voltage switchgear door. The first rotating plate is driven by a rotating column, and the second and third rotating plates rotate synchronously with the first rotating plate via the linkage rod. Each rotating plate is connected to a connecting rod and a locking pin. The rotation of the rotating plate drives the locking pins to extend or retract synchronously, achieving multi-point locking and unlocking of the door and door frame. The device also includes a telescopic assembly with a controller linked to the high-voltage switchgear's electrical circuit. This controller automatically controls the extension and retraction of the locking column based on the high-voltage switchgear's energized state, achieving forced locking during energization and automatic unlocking during power failure. This application simplifies the operation process, has a stable and durable structure, and effectively improves the operational safety and maintenance convenience of the high-voltage switchgear.

Description

Technical Field

[0001] This application relates to the field of high-voltage equipment safety technology, and in particular to an interlocking device for a high-voltage switchgear. Background Technology

[0002] As a core device in the power system used for power distribution, control, and protection, the operational safety of high-voltage switchgear directly affects the stability of the power network and the personal safety of maintenance personnel. Interlocking devices are critical safety components of high-voltage switchgear, preventing maintenance personnel from accidentally opening the doors while the equipment is energized, thus avoiding electric shock accidents.

[0003] Existing high-voltage switchgear interlocking devices mostly employ a single locking point structure, relying solely on a pin on one side of the door to engage with the door frame for locking, resulting in poor locking reliability. Under vibration or external impact during high-voltage switchgear operation, a single locking point is prone to loosening, causing the interlocking function to fail. Furthermore, some multi-locking point devices require multiple independent operating mechanisms to control different locking pins, leading to cumbersome operation, susceptibility to errors, and an inability to achieve synchronized action of all locking points. Utility Model Content

[0004] This utility model addresses the aforementioned problems in the existing technology by providing an interlocking device for a high-voltage switchgear.

[0005] The objective of this utility model is mainly achieved through the following solution:

[0006] An interlocking device for a high-voltage switchgear includes a door frame and a door body. The door frame is installed at the opening of the high-voltage switchgear. One side of the door body is rotatably connected to one side of the door frame via a hinge. A handle is installed on one side of the front of the door body. The interlocking device is installed on the back of the door body and includes:

[0007] A protective cover, wherein an installation cavity is formed between the protective cover and the door body;

[0008] The first rotating plate is rotatably connected to the back of the door body via a rotating shaft. The first rotating plate has two first rotating holes evenly distributed around its rotation center. Each of the two first rotating holes is rotatably connected to a first connecting rod. The two first connecting rods face the left and right sides of the first rotating plate respectively. The ends of the first connecting rods are rotatably connected to a horizontally arranged first locking pin. A rotating column is rotatably connected between the door body and the protective cover. The rotating column is tangent to one side of the circular arc surface of the first rotating plate. By rotating the rotating column, the first rotating plate can be driven to rotate around its rotation center, thereby causing the two first locking pins to move away from or closer to the first rotating plate.

[0009] The second and third rotating plates are rotatably connected to the back of the door body via a rotating shaft. The second rotating plate is located directly above the first rotating plate, and the third rotating plate is located directly below the first rotating plate. A vertically arranged linkage rod is movably connected between the first, second, and third rotating plates.

[0010] The second rotating plate is provided with four second rotating holes evenly circumferentially along its rotation center. A second connecting rod is rotated on three of the second rotating holes respectively. The three second connecting rods are respectively facing the left and right sides and the top side of the second rotating plate. The ends of the left and right second connecting rods are rotatably connected to a horizontally set second locking pin, and the end of the top second connecting rod is rotatably connected to a vertically set second locking pin. By rotating the second rotating plate, the three second locking pins are driven away from or close to the second rotating plate.

[0011] The third rotating plate is provided with four third rotating holes evenly distributed around its rotation center. Three of the third rotating holes are connected to a third connecting rod. The three third connecting rods are respectively oriented towards the left, right and bottom sides of the third rotating plate. The ends of the left and right second connecting rods are rotatably connected to a horizontally arranged third locking pin, and the end of the bottom third connecting rod is rotatably connected to a vertically arranged third locking pin. By rotating the third rotating plate, the three third locking pins are moved away from or closer to the third rotating plate.

[0012] Preferably, the inner edge of the door frame is provided with a locking block corresponding to the first locking pin, the second locking pin and the third locking pin, and when the first locking pin, the second locking pin and the third locking pin are respectively away from the corresponding rotating plate, the ends of the first locking pin, the second locking pin and the third locking pin can be tightly fitted with the side wall of the locking block, and the ends of the first locking pin, the second locking pin and the third locking pin are all provided with guide slopes.

[0013] Preferably, the front side of the rotating column passes through the front side of the door and is integrally provided with a limiting column. The limiting column is equipped with a rotating wrench, and the middle part of the rotating wrench is provided with a limiting groove for use with the limiting column.

[0014] Preferably, the end of the rotary wrench away from the limiting groove is integrally formed with an anti-slip handle, and the outer wall of the anti-slip handle is provided with uniformly distributed anti-slip textures.

[0015] Preferably, a guide cylinder is provided on the back of the door body at the position corresponding to the first locking pin, the second locking pin and the third locking pin, so that the first locking pin, the second locking pin and the third locking pin can slide along the corresponding guide cylinder.

[0016] Preferably, the back of the door body is provided with a first positioning post and a second positioning post on both sides of the first rotating plate, and the first positioning groove and the second positioning groove are provided on both sides of the first rotating plate.

[0017] During the rotation of the first rotating plate, when the first positioning groove comes into contact with the first positioning post, the first locking pin, the second locking pin and the third locking pin move away from the corresponding rotating plate, and the door body and the door frame are locked.

[0018] During the process of the first rotating plate rotating in another direction, when the second positioning groove comes into contact with the second positioning post, the first locking pin, the second locking pin and the third locking pin approach the corresponding rotating plate, and the door body and the door frame are in a loose state.

[0019] Preferably, a locking hole is provided on the side wall of the first rotating plate, and a telescopic component is installed on the back of the door body. The telescopic component is located between the door body and the first rotating plate, and a locking pin is fixedly connected to the telescopic end of the telescopic component. When the first positioning groove and the first positioning pin are in contact, the positions of the locking hole and the locking pin are corresponding.

[0020] Preferably, the ends of the first positioning post and the second positioning post are both fitted with elastic buffer sleeves, which are made of nitrile rubber.

[0021] Preferably, the outer wall of the rotating column is fitted with a wear-resistant rubber pad, which is interference-fitted with the rotating column. The outer wall of the rubber pad is provided with uniformly distributed anti-slip ridges, which are in close contact with the side wall of the first rotating plate. The first rotating plate is driven to rotate by the static friction between the rubber pad and the first rotating plate.

[0022] In summary, compared with the prior art, the present invention has the following beneficial technical effects:

[0023] (1) This utility model achieves synchronous locking of multiple locking points in multiple directions (up, down, left, right) through the linkage design of the first rotating plate, the second rotating plate and the third rotating plate. Compared with the existing single locking point device, the locking contact area is larger and the force is more uniform. It can effectively resist the vibration of the high-voltage cabinet operation and the impact of external forces, avoid the safety hazards caused by the loosening of the lock, and greatly improve the reliability of the interlocking device.

[0024] (2) This utility model uses a single rotating column as the driving core and achieves the synchronous movement of three rotating plates through the linkage rod. All locking pins can be extended and retracted by rotating the wrench once. There is no need to control multiple mechanisms separately, which simplifies the operation process, reduces the operation difficulty and error rate of maintenance personnel, and improves the efficiency of maintenance work.

[0025] (3) The first positioning post, the second positioning post and the first positioning groove and the second positioning groove on the rotating plate of this utility model can enable maintenance personnel to intuitively judge whether the door is locked or loose by the rotation feedback of the rotating wrench. At the same time, the anti-loosening mechanism of the locking post of the telescopic component and the locking hole of the rotating plate can prevent the device from rotating accidentally in the locked state, further improving the safety of operation.

[0026] (4) Each locking pin in this utility model is equipped with a guide cylinder to ensure the stability of the sliding process and avoid jamming; the rotating column and the first rotating plate are driven by a wear-resistant rubber pad, which can reduce mechanical wear; the elastic buffer sleeve at the end of the positioning column can reduce impact noise and wear; the overall structure is reasonably designed, with few vulnerable parts and a long service life, which can effectively reduce the maintenance cost of the equipment.

[0027] (5) The protective cover in this utility model can effectively protect the internal transmission mechanism and prevent the failure of the mechanism caused by the intrusion of dust, water vapor and debris, so that the device can adapt to different working environments; the guide slope design at the end of the locking pin can reduce the difficulty of cooperating with the locking block during the locking process and improve the smoothness of operation. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model;

[0029] Figure 2 This is a schematic diagram of the structure of this utility model from another angle;

[0030] Figure 3 This is a schematic diagram of the installation of the linkage plate in this utility model;

[0031] Figure 4 This is an installation diagram of the first link, the second link, and the third link in this utility model;

[0032] Figure 5 This is a schematic diagram of the installation of the first positioning post and the second positioning post in this utility model.

[0033] Reference numerals: 1-Door frame; 2-Door body; 3-Hinge; 4-Handle; 5-Protective cover; 6-First rotating plate; 7-First rotating hole; 8-First connecting rod; 9-First locking pin; 10-Rotating column; 11-Second rotating plate; 12-Third rotating plate; 13-Linkage rod; 14-Second rotating hole; 15-Second connecting rod; 16-Second locking pin; 17-Third rotating hole; 18-Third connecting rod; 19-Third locking pin; 20-Clamping block; 21-Guide inclined surface; 22-Limiting post; 23-Rotating wrench; 24-Limiting groove; 25-Anti-slip handle; 26-Guide cylinder; 27-First positioning post; 28-Second positioning post; 29-First positioning groove; 30-Second positioning groove; 31-Locking hole; 32-Telescopic assembly; 33-Locking post; 34-Rubber pad. Detailed Implementation

[0034] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of this utility model is not limited to the following embodiments, and any modifications and / or alterations made to this utility model will fall within the protection scope of this utility model.

[0035] like Figure 1 , 2 As shown, this utility model discloses a technical solution: an interlocking device for a high-voltage switchgear, including a door frame 1 and a door body 2. The door frame 1 is fixedly installed at the opening of the high-voltage switchgear by bolts. One side of the door body 2 is rotatably connected to one side of the door frame 1 by a hinge 3, and a handle 4 is installed on the front side of the door body 2. The interlocking device is installed on the back of the door body 2, and its core structure includes a protective cover 5, a first rotating plate 6, a second rotating plate 11, a third rotating plate 12, and a linkage rod 13. The specific structure is as follows:

[0036] Protective cover 5: It is detachably fixed to the back of the door body 2 by bolts, forming a closed installation cavity between the two, which is used to protect the internal transmission structure and prevent dust, debris and external forces from interfering with the mechanism. The side wall of the protective cover 5 is provided with through holes for the corresponding locking pins to pass through.

[0037] The first rotating plate 6 is rotatably connected to the back of the door body 2 via a pivot, and its central axis is perpendicular to the surface of the door body 2. Two first rotating holes 7 are evenly distributed circumferentially along the center of rotation on the first rotating plate 6. Each first rotating hole 7 is rotatably connected to a first connecting rod 8 via a pin. The two first connecting rods 8 extend towards the left and right sides of the first rotating plate 6, respectively. The end of the first connecting rod 8 furthest from the first rotating plate 6 is rotatably connected to a horizontally positioned first locking pin 9 via a pin, and the first locking pin 9 can slide back and forth in the horizontal direction.

[0038] Rotary drive mechanism: such as Figure 3As shown, a rotating column 10 is rotatably connected between the door body 2 and the protective cover 5 via a bearing. The axis of the rotating column 10 is perpendicular to the surface of the door body 2, and its outer side wall is tangent to one side of the circular arc surface of the first rotating plate 6. A wear-resistant rubber pad 34 is fitted around the outer side wall of the rotating column 10. The rubber pad 34 and the rotating column 10 are interference-fitted. The outer side wall of the rubber pad 34 is provided with evenly distributed anti-slip ridges. The anti-slip ridges abut tightly against the side wall of the first rotating plate 6. The static friction between the rubber pad 34 and the first rotating plate 6 drives the first rotating plate 6 to rotate around its rotation center. This, in turn, drives the two first locking pins 9 to move away from or towards the first rotating plate 6 simultaneously via the first connecting rod 8. Alternatively, depending on the actual situation, a meshing tooth groove can be provided between the circular arc surface of one side of the first rotating plate 6 and the outer side wall of the rotating column 10, thereby enabling the rotation of the first rotating plate 6 and the rotating column 10.

[0039] Linked institutions: such as Figure 4 As shown, the second rotating plate 11 and the third rotating plate 12 are both rotatably connected to the back of the door body 2 via a pivot. The second rotating plate 11 is located directly above the first rotating plate 6, and the third rotating plate 12 is located directly below the first rotating plate 6. The first rotating plate 6, the second rotating plate 11, and the third rotating plate 12 are movably connected by a vertically arranged linkage rod 13. Both ends and the middle of the linkage rod 13 are respectively engaged with the connecting holes on the three rotating plates via pins, so that the three rotating plates can rotate synchronously. The rotation centers of the first rotating plate 6, the second rotating plate 11, and the third rotating plate 12 are on the same vertical line.

[0040] Upper locking mechanism: Four second rotating holes 14 are evenly distributed circumferentially along the center of rotation on the second rotating plate 11. Three of the second rotating holes 14 are rotatably connected to a second connecting rod 15 via pins. The three second connecting rods 15 extend toward the left, right, and upper sides of the second rotating plate 11, respectively. The ends of the second connecting rods 15 on the left and right sides are rotatably connected to horizontally arranged second locking pins 16, and the end of the second connecting rod 15 on the upper side is rotatably connected to a vertically arranged second locking pin 16. By rotating the second rotating plate 11, the three second locking pins 16 can be driven to move away from or toward the second rotating plate 11 simultaneously.

[0041] Lower locking mechanism: Four third rotating holes 17 are evenly distributed circumferentially along the center of rotation on the third rotating plate 12. Three of the third rotating holes 17 are rotatably connected to a third connecting rod 18 via pins. The three third connecting rods 18 extend toward the left, right, and lower sides of the third rotating plate 12, respectively. The ends of the third connecting rods 18 on the left and right sides are rotatably connected to horizontally arranged third locking pins 19, and the end of the third connecting rod 18 on the lower side is rotatably connected to a vertically arranged third locking pin 19. By rotating the third rotating plate 12, the three third locking pins 19 can be driven to move away from or toward the third rotating plate 12 simultaneously.

[0042] To improve the reliability and ease of operation of the device, the following auxiliary structures are also provided:

[0043] Locking engagement structure: A locking block 20, corresponding to the first locking pin 9, the second locking pin 16, and the third locking pin 19, is welded, bolted, or bonded to the inner edge of the door frame 1. When the locking pin moves away from the corresponding rotating plate, its end can tightly fit against the side wall of the locking block 20 to achieve locking. Each locking pin has a guide slope 21 at its end to facilitate engagement with the locking block 20 during the locking process.

[0044] Operating Mechanism: A rectangular-section limiting post 22 is integrally formed on the front side of the rotating column 10, passing through the front side of the door body 2. The limiting post 22 is equipped with a rotating wrench 23. The middle of the rotating wrench 23 has a limiting groove 24 that works with the limiting post 22. The rotating column 10 can be rotated by the engagement of the limiting groove 24 and the limiting post 22. The end of the rotating wrench 23 away from the limiting groove 24 has an integrally formed anti-slip handle 25. The outer wall of the handle has evenly distributed anti-slip textures to improve the grip stability during operation.

[0045] Guide structure: Guide cylinders 26 are fixedly installed on the back of the door body 2 and at the corresponding positions of each locking pin by bolts. The locking pins pass through the inside of the guide cylinders 26 and can slide along the axis of the guide cylinders 26. The guide cylinders 26 can ensure the coaxiality of the locking pins during the sliding process and avoid jamming.

[0046] Status positioning mechanism: such as Figure 5 As shown, a first positioning post 27 and a second positioning post 28 are fixedly installed on both sides of the back of the door body 2, located on the first rotating plate 6. The first rotating plate 6 has a first positioning groove 29 and a second positioning groove 30 on each side, which mate with the positioning posts. When the first positioning groove 29 contacts the first positioning post 27, all locking pins are extended and locked; when the second positioning groove 30 contacts the second positioning post 28, all locking pins are retracted and released. The ends of both the first positioning post 27 and the second positioning post 28 are fitted with elastic buffer sleeves made of nitrile rubber to reduce impact and noise during positioning contact.

[0047] Anti-loosening mechanism: A locking hole 31 is provided on the side wall of the first rotating plate 6, and a telescopic component 32 is installed on the back of the door 2. The telescopic component 32 adopts a small push rod motor, and its telescopic end is fixedly connected to a locking pin 33. A dedicated controller is also configured, which is connected to the electrical circuit signal of the high-voltage cabinet and can detect the energized status of the high-voltage cabinet in real time. When the controller detects that the high-voltage cabinet is energized, regardless of whether the first rotating plate 6 is in the locking position, if it is not locked, the controller will send a signal to the maintenance personnel to complete the locking operation. If it is locked, that is, the first positioning groove 29 and the first positioning pin 27 are in contact, the controller controls the push rod motor to extend, driving the locking pin 33 to embed into the locking hole 31, thereby forcibly locking the first rotating plate 6. When the controller detects that the high-voltage cabinet is de-energized, the push rod motor retracts under the control of the controller, driving the locking pin 33 to disengage from the locking hole 31, releasing the lock on the first rotating plate 6. At this time, the maintenance personnel can operate the rotary wrench to loosen the interlocking device. The purpose of using a push rod motor is to achieve forced linkage between the interlocking device and the electrical status of the high-voltage cabinet, avoid human error through automated control, fundamentally eliminate the risk of the door being accidentally opened when the high-voltage cabinet is energized, and improve the convenience and reliability of operation.

[0048] The working principle of this utility model is as follows:

[0049] Locking process: The limiting groove 24 of the rotary wrench 23 is engaged with the limiting post 22 on the front of the door body 2. Rotating the rotary wrench 23 drives the rotating post 10 to rotate. The rotating post 10 drives the first rotating plate 6 to rotate around its axis through the static friction between the wear-resistant rubber pad 34 on the outside and the first rotating plate 6. The first rotating plate 6 pushes the first locking pin 9 to extend outward along the guide cylinder 26 through the first connecting rods 8 on the left and right sides. At the same time, the first rotating plate 6 drives the second rotating plate 11 above and the third rotating plate 12 below to rotate synchronously through the vertical linkage rod 13. The second rotating plate 11 pushes the second locking pins 16 on the upper side and the left and right sides to extend through the three second connecting rods 15. The third rotating plate 12 pushes the third locking pins 19 on the lower side and the left and right sides to extend through the three third connecting rods 18. When the ends of each locking pin are tightly fitted with the locking block 20 on the door frame 1, the first positioning groove 29 on the first rotating plate 6 contacts and positions itself with the first positioning post 27. At the same time, the locking post 33 of the telescopic assembly 32 is embedded in the locking hole 31 of the first rotating plate 6, thus completing the locking of the door. The rotating wrench 23 can then be removed.

[0050] Release Process: After confirming that the high-voltage cabinet is powered off, the PLC controller will detect the power-off status of the high-voltage cabinet in real time and automatically control the push rod motor of the telescopic component 32 to retract, causing the locking pin 33 to disengage from the locking hole 31. At this time, the maintenance personnel will put the rotary wrench 23 into the limit pin 22 and rotate the rotary wrench 23 in the opposite direction to drive the rotating pin 10 to rotate in the opposite direction, thereby driving the first rotating plate 6 to rotate in the opposite direction. The first rotating plate 6 pulls the first locking pin 9 to retract through the first connecting rod 8, and at the same time drives the second rotating plate 11 and the third rotating plate 12 to rotate in the opposite direction through the linkage rod 13, so that the second locking pin 16 and the third locking pin 19 retract synchronously. When the second positioning groove 30 on the first rotating plate 6 contacts and positions itself with the second positioning pin 28, all locking pins completely disengage from the clamping block 20, completing the release. After removing the rotary wrench 23, the door 2 can be opened through the handle 4. If the high-voltage switchgear is not de-energized, the controller will keep the push rod motor extended, the locking pin 33 will be embedded in the locking hole 31, and the rotating wrench will not be able to drive the first rotating plate 6 to rotate, thus forming a forced safety interlock.

[0051] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An interlocking device for a high-voltage switchgear, comprising a door frame (1) and a door body (2), wherein the door frame (1) is installed at the opening of the high-voltage switchgear, one side of the door body (2) is rotatably connected to one side of the door frame (1) by a hinge (3), and a handle (4) is installed on one side of the front of the door body (2), characterized in that, The interlocking device is installed on the back of the door (2) and includes: A protective cover (5) is provided, and an installation cavity is formed between the protective cover (5) and the door body (2); The first rotating plate (6) is rotatably connected to the back of the door body (2) via a rotating shaft. The first rotating plate (6) has two first rotating holes (7) evenly arranged around its rotation center. Each of the two first rotating holes (7) is rotatably connected to a first connecting rod (8). The two first connecting rods (8) are respectively facing the left and right sides of the first rotating plate (6). The end of the first connecting rod (8) is rotatably connected to a horizontally arranged first locking pin (9). A rotating column (10) is rotatably connected between the door body (2) and the protective cover (5). The rotating column (10) is tangent to one side of the circular arc surface of the first rotating plate (6). By rotating the rotating column (10), the first rotating plate (6) can be driven to rotate along its rotation center, thereby causing the two first locking pins (9) to move away from or closer to the first rotating plate (6). The second rotating plate (11) and the third rotating plate (12) are rotatably connected to the back of the door body (2) via a rotating shaft. The second rotating plate (11) is located directly above the first rotating plate (6), and the third rotating plate (12) is located directly below the first rotating plate (6). A vertically arranged linkage rod (13) is movably connected between the first rotating plate (6), the second rotating plate (11) and the third rotating plate (12). The second rotating plate (11) is provided with four second rotating holes (14) evenly circumferentially around its rotation center. A second connecting rod (15) is rotated on three of the second rotating holes (14). The three second connecting rods (15) are respectively facing the left and right sides and the top side of the second rotating plate (11). The ends of the left and right second connecting rods (15) are rotatably connected to a horizontally arranged second locking pin (16). The end of the upper second connecting rod (15) is rotatably connected to a vertically arranged second locking pin (16). By rotating the second rotating plate (11), the three second locking pins (16) are driven away from or close to the second rotating plate (11). The third rotating plate (12) is provided with four third rotating holes (17) evenly circumferentially around its rotation center. A third connecting rod (18) is rotated on each of the three third rotating holes (17). The three third connecting rods (18) are respectively facing the left and right sides and the bottom side of the third rotating plate (12). The ends of the left and right second connecting rods (15) are rotatably connected to a horizontally arranged third locking pin (19). The end of the bottom third connecting rod (18) is rotatably connected to a vertically arranged third locking pin (19). By rotating the third rotating plate (12), the three third locking pins (19) are driven away from or close to the third rotating plate (12).

2. The interlocking device for a high-voltage switchgear according to claim 1, characterized in that, The inner edge of the door frame (1) is provided with a clamping block (20) corresponding to the first locking pin (9), the second locking pin (16) and the third locking pin (19). When the first locking pin (9), the second locking pin (16) and the third locking pin (19) are far away from the corresponding rotating plate, the ends of the first locking pin (9), the second locking pin (16) and the third locking pin (19) can fit tightly against the side wall of the clamping block (20). The ends of the first locking pin (9), the second locking pin (16) and the third locking pin (19) are all provided with a guide slope (21).

3. The interlocking device for a high-voltage switchgear according to claim 1, characterized in that, The front side of the rotating column (10) passes through the front side of the door body (2) and is integrally provided with a limiting column (22). The limiting column (22) is equipped with a rotating wrench (23). The middle part of the rotating wrench (23) is provided with a limiting groove (24) that cooperates with the limiting column (22).

4. The interlocking device for a high-voltage switchgear according to claim 3, characterized in that, The end of the rotary wrench (23) away from the limiting groove (24) is integrally formed with an anti-slip handle (25), and the outer wall of the anti-slip handle (25) is provided with uniformly distributed anti-slip texture.

5. The interlocking device for a high-voltage switchgear according to claim 1, characterized in that, The back of the door (2) is provided with a guide cylinder (26) corresponding to the first locking pin (9), the second locking pin (16) and the third locking pin (19), and the first locking pin (9), the second locking pin (16) and the third locking pin (19) can slide along the corresponding guide cylinder (26).

6. The interlocking device for a high-voltage switchgear according to claim 1, characterized in that, The back of the door (2) is provided with a first positioning post (27) and a second positioning post (28) on both sides of the first rotating plate (6), and the first positioning groove (29) and the second positioning groove (30) are provided on both sides of the first rotating plate (6). During the rotation of the first rotating plate (6), when the first positioning groove (29) comes into contact with the first positioning post (27), the first locking pin (9), the second locking pin (16) and the third locking pin (19) move away from the corresponding rotating plate, and the door body (2) and the door frame (1) are locked. During the process of the first rotating plate (6) rotating in another direction, when the second positioning groove (30) comes into contact with the second positioning post (28), the first locking pin (9), the second locking pin (16) and the third locking pin (19) approach the corresponding rotating plate, and the door body (2) and the door frame (1) are in a loose state.

7. The interlocking device for a high-voltage switchgear according to claim 6, characterized in that, A locking hole (31) is provided on the side wall of the first rotating plate (6), and a telescopic component (32) is installed on the back of the door body (2). The telescopic component (32) is located between the door body (2) and the first rotating plate (6), and a locking pin (33) is fixedly connected to the telescopic end of the telescopic component (32). When the first positioning groove (29) and the first positioning pin (27) come into contact, the positions of the locking hole (31) and the locking pin (33) correspond to each other.

8. The interlocking device for a high-voltage switchgear according to claim 6, characterized in that, The ends of the first positioning post (27) and the second positioning post (28) are both fitted with elastic buffer sleeves, which are made of nitrile rubber.

9. The interlocking device for a high-voltage switchgear according to claim 1, characterized in that, The outer wall of the rotating column (10) is fitted with a wear-resistant rubber pad (34). The rubber pad (34) and the rotating column (10) are interference-fitted. The outer wall of the rubber pad (34) is provided with uniformly distributed anti-slip ridges. The anti-slip ridges are in close contact with the side wall of the first rotating plate (6). The first rotating plate (6) is driven to rotate by the static friction between the rubber pad (34) and the first rotating plate (6).

Images