A safety locking mechanism for an electrical cabinet

Abstract

The utility model discloses a kind of electric power cabinet safety locking mechanism, including positioning plate and driving turntable;Locking plate is fixed on driving turntable, through hole is equipped on cabinet door, driving turntable center is equipped with operating hole;Driving pipe portion that is around operating hole and is worn to the outer surface of cabinet door through through hole is equipped on driving turntable;Positioning plate is limit installed with disconnecting drive lever on the side close to driving turntable, driving turntable is connected with disconnecting drive lever by linkage structure, when driving turntable rotates, disconnecting drive lever is driven to do linear movement between first position and second position by linkage structure, the end of disconnecting drive lever away from positioning plate is action end;By integrating linkage of driving turntable, locking plate and disconnecting drive lever, two key operations of "driving disconnecting" and "unlocking cabinet door" are simultaneously completed by single rotation action, the safety logic of "disconnecting first, then opening door" is forcibly ensured, the risk of electrified unlocking is eliminated from the source, operation procedure is simple and reliable.

Description

Technical Field

[0001] This utility model belongs to the field of power cabinet structural design, specifically relating to a power cabinet safety locking mechanism. Background Technology

[0002] In the operation and maintenance of power systems, the safe operation of power equipment such as high-voltage switchgear is crucial. Current technology often uses simple mechanical padlocks or electromagnetic locks on cabinet doors to prevent accidental operation. However, these locks only provide basic isolation and cannot force operators to perform the critical safety step of disconnecting the power before opening the cabinet door. Furthermore, conventional interlocking mechanisms are often complex, requiring multiple independent components to control the door lock and switch, resulting in cumbersome operation procedures and insufficient reliability. This still poses a significant safety risk of personnel accidentally entering a energized compartment without confirming power disconnection. Therefore, there is an urgent need for an interlocking mechanism that can actively and forcibly link the disconnection operation with the door lock status. Utility Model Content

[0003] The purpose of this utility model is to provide a safety interlocking mechanism for power cabinets, which, through a mechanical linkage structure, forces the safe operation logic of "opening the switch first and then opening the door", effectively solving the problems of cumbersome operation steps, insufficient reliability of safety interlocking, and the possibility of personnel accidentally entering the energized compartment in the existing technology.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] This utility model provides a safety interlocking mechanism for a power cabinet, installed inside the cabinet door; it includes a positioning plate and a drive turntable; the positioning plate is fixedly connected to the cabinet door and has an installation gap; the drive turntable is rotatably disposed within the installation gap and can rotate around its own axis; a locking plate protruding radially is fixed on the drive turntable; the cabinet door has a through hole; the center of the drive turntable has an operating hole opposite to the through hole; the drive turntable has a drive tube portion surrounding the operating hole and passing through the through hole to the outer surface of the cabinet door; a tripping drive rod is limited and installed on the side of the positioning plate near the drive turntable; the drive turntable and the tripping drive rod are connected by a linkage structure; when the drive turntable rotates, the tripping drive rod moves linearly between a first position and a second position through the linkage structure; the end of the tripping drive rod away from the positioning plate is the actuating end.

[0006] Preferably, the cross-sectional shape of the inner cavity of the drive tube is polygonal, or / and the cross-sectional shape of the outer peripheral surface of the drive tube is polygonal.

[0007] Preferably, the linkage structure includes an arc-shaped hole on the drive turntable and a connecting shaft on the tripping drive rod. The center of the arc-shaped hole is offset from the center of the positioning plate. The connecting shaft passes through the arc-shaped hole. When the drive turntable rotates, it pushes the connecting shaft through the side wall of the arc-shaped hole to move the tripping drive rod.

[0008] Preferably, a bearing is fitted onto the outside of the connecting shaft, and the bearing is located inside the arc-shaped hole.

[0009] Preferably, the positioning plate is provided with a limiting groove, and the end of the tripping drive rod near the positioning plate forms a sliding fit with the limiting groove.

[0010] Preferably, a positioning component is fixed inside the cabinet door, and the positioning component is provided with a sliding hole, through which the tripping drive rod passes.

[0011] Preferably, the tripping drive rod is a stamped part, and the actuating end is provided with a sleeve hole; a push plate is fixed to the edge of the sleeve hole at a 90-degree angle with the tripping drive rod.

[0012] Preferably, the locking plate and the drive turntable are integrally formed.

[0013] Preferably, a support column is fixed between the positioning plate and the inner side of the cabinet door.

[0014] The positive effects of this utility model are as follows: By integrating the drive turntable, locking plate, and tripping drive rod, this utility model achieves a mandatory safety logic of "tripping the circuit breaker first, then opening the door." Operators only need to rotate the drive turntable to automatically complete the process of cutting off the power and unlocking the door in a single action, simplifying the operation steps and eliminating the risk of unlocking while the circuit is energized due to omissions in the process. Its purely mechanical linkage structure ensures reliability and stability, and the compact integrated design simplifies the overall structure, reduces manufacturing costs, and provides a more fundamental safety guarantee for power workers, making it highly practical. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art are briefly introduced below. Similar elements or parts in the drawings are generally identified by similar reference numerals. The elements or parts in the drawings are not necessarily drawn to scale.

[0016] Figure 1 This is a schematic diagram of the safety interlocking mechanism of the power cabinet in this utility model.

[0017] Figure 2 This is a structural schematic diagram of the safety interlocking mechanism of the power cabinet in this utility model from another perspective.

[0018] Figure 3 This is a schematic diagram of the front side of the power cabinet safety interlocking mechanism when it is installed on the cabinet door.

[0019] Figure 4 This is a schematic diagram of the rear structure of the power cabinet safety interlocking mechanism when it is installed on the cabinet door.

[0020] The attached figures are labeled as follows: 1. Cabinet door; 10. Through hole; 2. Positioning plate; 21. Limiting slide groove; 3. Drive turntable; 30. Drive tube; 31. Locking plate; 32. Arc-shaped hole; 4. Installation gap; 5. Opening drive rod; 50. Bearing; 51. Connecting shaft; 52. Sleeve hole; 53. Push plate; 6. Positioning component; 61. Sliding hole; 7. Support column. Detailed Implementation

[0021] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0022] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0023] The power cabinet safety locking mechanism in this embodiment of the utility model is installed inside the cabinet door 1; see reference Figures 1 to 4As shown, it includes a positioning plate 2 and a drive turntable 3; the positioning plate 2 is fixedly connected to the cabinet door 1 and has an installation gap 4; the drive turntable 3 is rotatably disposed within the installation gap 4 and can rotate around its own axis; a radially protruding locking plate 31 is fixed on the drive turntable 3; the locking plate 31 is used to cooperate with the cabinet body to lock or unlock the cabinet door (when the drive turntable 3 rotates to a certain angle, the locking plate 31 rotates into the slot of the cabinet door frame to lock; when rotated to another angle, it rotates out of the slot to unlock); the cabinet door 1 has a through hole 10; the drive turntable 3... The turntable 3 has an operating hole at its center that is opposite to the through hole 10; the drive turntable 3 has a drive tube 30 that surrounds the operating hole and passes through the through hole 10 to the outer surface of the cabinet door 1; a tripping drive rod 5 is installed on the positioning plate 2 near the drive turntable 3, and the drive turntable 3 and the tripping drive rod 5 are connected by a linkage structure. When the drive turntable 3 rotates, the tripping drive rod 5 is driven to move linearly between the first position and the second position through the linkage structure. The end of the tripping drive rod 5 away from the positioning plate 2 is the working end. When cabinet door 1 needs to be opened, the operator uses a tool to rotate the drive tube 30, which in turn rotates the drive turntable 3 and its locking plate 31. The rotation of the locking plate 31 unlocks the cabinet frame. At the same time, the drive turntable 3 drives the tripping drive rod 5 through its linkage structure, causing it to move linearly from the first position to the second position (the tripping drive rod 5 does not contact the main switch operating handle in the first position). During the movement of the tripping drive rod 5 to the second position, its actuating end pushes the operating handle of the main switch inside the cabinet to disconnect the power. The mechanical linkage design of the entire process ensures that cabinet door 1 can only be finally opened after the power is completely cut off, thus realizing the mandatory safety logic of "tripping the circuit breaker first, then opening the door". In this application, by integrating the drive turntable 3, locking plate 31 and tripping drive rod 5, a single rotation action can simultaneously complete the two key operations of "driving the circuit breaker to trip" and "unlocking cabinet door 1", forcibly guaranteeing the safety logic of "tripping the circuit breaker first, then opening the door", eliminating the risk of unlocking while the power is on, and the operation process is simple and reliable.

[0024] like Figure 2 and Figure 3 As shown, the cross-sectional shape of the inner cavity of the drive tube 30 is polygonal, and the inner cavity and / or outer peripheral surface of the drive tube 30 are also polygonal. This facilitates the operator's use of tools to apply force to the drive tube 30 to drive the drive turntable 3 to rotate, thereby achieving the locking and unlocking of the lock plate 31 and the door frame. In actual operation, the cross-sectional shape of the outer peripheral surface of the drive tube 30 can also be set to be polygonal.

[0025] See Figure 2The linkage structure includes an arc-shaped hole 32 on the drive turntable 3 and a connecting shaft 51 on the tripping drive rod 5. The center of the arc-shaped hole 32 is offset from the center of the positioning plate 2. The connecting shaft 51 passes through the arc-shaped hole 32. When the drive turntable 3 rotates, it pushes the connecting shaft 51 through the side wall of the arc-shaped hole 32 to move the tripping drive rod 5. When the operator rotates the drive turntable 3, the eccentric arc-shaped hole 32 on the drive turntable 3 rotates accordingly. Since the center of the arc-shaped hole 32 is offset from the rotation center of the drive turntable 3, its inner hole... A relative displacement occurs between the wall and the connecting shaft 51 through which it passes. During the rotation of the drive turntable 3, the side wall of the arc-shaped hole 32 continuously applies a force to the connecting shaft 51. Since the tripping drive rod 5 can only move linearly, it can drive the tripping drive rod 5 to make linear motion during the rotation of the drive turntable 3. The arc-shaped hole 32 with the center offset cooperates with the connecting shaft 51 to form a linkage structure that is simple in structure and reliable in operation. It can effectively convert the rotational motion of the drive turntable 3 into the linear motion required by the tripping drive rod 5. The power transmission is direct and the manufacturing and assembly are simple.

[0026] Continue reading Figure 2 The connecting shaft 51 is externally fitted with a bearing 50, which is located inside the arc-shaped hole 32. This structure transforms the sliding friction between the connecting shaft 51 and the inner wall of the arc-shaped hole 32 into rolling friction, which can significantly reduce frictional resistance and wear during operation. This makes the rotation of the drive turntable 3 and the movement of the brake lever 5 more effortless and smoother, effectively solving the jamming problem caused by wear after long-term use. This greatly improves the service life, operation feel and reliability of the linkage structure.

[0027] See Figure 1 and Figure 4 The positioning plate 2 is provided with a limiting groove 21, and the end of the tripping drive rod 5 near the positioning plate 2 forms a sliding fit with the limiting groove 21; a positioning component 6 is fixed inside the cabinet door 1, and the positioning component 6 is provided with a sliding hole 61. The tripping drive rod 5 is set through the sliding hole 61. The limiting groove 21 and the sliding hole 61 work together to limit the tripping drive rod 5, providing precise linear guidance for the movement of the tripping drive rod 5, preventing it from deflecting or getting stuck during the movement, and ensuring smooth and accurate operation.

[0028] like Figure 1As shown, the tripping drive rod 5 is a stamped part, and the actuating end is provided with a sleeve hole 52, which is used to avoid the operating handle of the main switch inside the cabinet; a push plate 53 is fixed to the edge of the sleeve hole 52 at a 90-degree angle to the tripping drive rod 5; the tripping drive rod 5 adopts an integral stamping process, which is conducive to mass production and reduces costs; the push plate 53, which is set on it at a 90-degree angle to the rod body, drives the operating handle of the main switch to perform the tripping action when the tripping drive rod 5 moves to the second position, which can effectively transmit the linear thrust to the operating handle of the main switch inside the cabinet, optimize the angle of force application, and improve the reliability of the tripping action.

[0029] In this embodiment, the locking plate 31 and the drive turntable 3 are integrally formed, eliminating the risk of failure due to loose connecting parts or welding fatigue, and enhancing the structural strength and integrity of the entire rotating component. In actual operation, the locking plate 31 and the drive turntable 3 can also be welded or fixedly connected by bolts.

[0030] See Figure 4 As shown, a support column 7 is fixed between the positioning plate 2 and the inner side of the cabinet door 1. The support column 7 forms the installation gap 4 between the positioning plate 2 and the cabinet panel, resulting in good structural stability. The positioning plate 2, the support column 7, and the cabinet door 1 can be fastened together by screws or welding.

[0031] For those skilled in the art, other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, these obvious variations or modifications derived from the essential spirit of this invention still fall within the protection scope of this invention.

Claims

1. A safety interlocking mechanism for an electrical cabinet, installed inside the cabinet door (1); characterized in that: Includes a positioning plate (2) and a drive turntable (3); The positioning plate (2) is fixedly connected to the cabinet door (1) and has an installation gap (4). The drive turntable (3) is rotatably disposed in the installation gap (4) and can rotate around its own axis. A locking plate (31) protruding radially is fixed on the drive turntable (3). A through hole (10) is provided on the cabinet door (1). An operation hole opposite to the through hole (10) is provided in the center of the drive turntable (3). A drive tube (30) is provided on the drive turntable (3) surrounding the operation hole and passing through the through hole (10) to the outer surface of the cabinet door (1). A tripping drive rod (5) is installed on the side of the positioning plate (2) near the drive turntable (3). The drive turntable (3) and the tripping drive rod (5) are connected by a linkage structure. When the drive turntable (3) rotates, the tripping drive rod (5) moves linearly between the first position and the second position through the linkage structure. The end of the tripping drive rod (5) away from the positioning plate (2) is the working end.

2. The power cabinet safety interlocking mechanism according to claim 1, characterized in that: The cross-sectional shape of the inner cavity of the drive tube (30) is polygonal, or / and the cross-sectional shape of the outer peripheral surface of the drive tube (30) is polygonal.

3. The power cabinet safety interlocking mechanism according to claim 1, characterized in that: The linkage structure includes an arc-shaped hole (32) on the drive turntable (3) and a connecting shaft (51) on the tripping drive rod (5). The center of the arc-shaped hole (32) is offset from the center of the positioning plate (2). The connecting shaft (51) passes through the arc-shaped hole (32). When the drive turntable (3) rotates, it pushes the connecting shaft (51) through the side wall of the arc-shaped hole (32) to move the tripping drive rod (5).

4. The power cabinet safety interlocking mechanism according to claim 3, characterized in that: The connecting shaft (51) is fitted with a bearing (50) on its outside, and the bearing (50) is located inside the arc-shaped hole (32).

5. The power cabinet safety interlocking mechanism according to claim 1, characterized in that: The positioning plate (2) is provided with a limiting groove (21), and the end of the opening drive rod (5) near the positioning plate (2) forms a sliding fit with the limiting groove (21).

6. The power cabinet safety interlocking mechanism according to claim 1, characterized in that: A positioning component (6) is fixed inside the cabinet door (1). The positioning component (6) has a sliding hole (61), and the tripping drive rod (5) passes through the sliding hole (61).

7. The power cabinet safety interlocking mechanism according to claim 1, characterized in that: The tripping drive rod (5) is a stamped part, and the actuating end is provided with a sleeve hole (52); a push plate (53) is fixed on the edge of the sleeve hole (52) at a 90-degree angle to the tripping drive rod (5).

8. The power cabinet safety interlocking mechanism according to claim 1, characterized in that: The locking plate (31) and the drive turntable (3) are integrally formed.

9. The power cabinet safety interlocking mechanism according to claim 1, characterized in that: A support column (7) is fixed between the positioning plate (2) and the inner side of the cabinet door (1).

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