Interlocking mechanism for handcart chamber door of centrally installed switchgear

Abstract

The utility model discloses a centrally installed switchgear handcart chamber door interlocking mechanism, which comprises a handcart chamber door and a frame body arranged on the outer side of the handcart chamber door, the top of the frame body is provided with a first round hole, and the inner cavity of the first round hole is rotatably connected with a square hole round tube. The handle is pressed to push the positioning block out of the inner cavity of the positioning hole, then the handle is rotated to drive the square rod to rotate, the square rod rotates to drive the rotating shaft to rotate and drive the protruding plate to rotate, and therefore after the protruding plate rotates by 90 degrees, the protruding plate and the positioning circular plate are staggered, and then the handcart room door is unlocked. When the grip is pressed to enable the convex plate to be attached to the handcart chamber door, the grip is rotated reversely to drive the convex plate to extrude the movable plate to move horizontally and to be attached to the right indicator plate, so that the positioning block can be aligned with the positioning hole, and after the grip is loosened, the positioning block can be inserted back into the positioning hole, and the handcart chamber door is linked and locked.

Description

Technical Field

[0001] This utility model relates to the technical field of high voltage switchgear component structure, and in particular to a central switchgear handcart compartment door interlocking mechanism. Background Technology

[0002] In a center-mounted switchgear, the circuit breaker trolley has two positions within the trolley compartment: the working position and the test position. After commissioning in the test position, the trolley compartment door needs to be closed, and then the operating handle drives the propulsion mechanism to advance the trolley to the working position. To ensure safety during operation and maintenance, the trolley compartment door must not be opened when the trolley is in the working position (which may be energized). Therefore, an interlocking mechanism is required to lock the trolley compartment door in the working position. Existing interlocking mechanisms for center-mounted switchgear trolley compartment doors often suffer from drawbacks such as complex structure, inconvenient installation and commissioning, and poor reliability. Utility Model Content

[0003] One of the objectives of this utility model is achieved through the following technical solution:

[0004] A centrally located cabinet handcart compartment door interlocking mechanism includes a handcart compartment door and a frame disposed on the outside of the handcart compartment door. The top of the frame has a first circular hole, and a square-hole tube is rotatably connected to the inner cavity of the first circular hole. Two fixing rings are sleeved and fixed to the outer wall of the square-hole tube, and the two fixing rings are respectively fitted to the outer wall and inner wall of the frame. A matching square rod is slidably connected to the inner cavity of the square-hole tube, and a handle is fixedly connected to the top of the square rod. A connecting plate is fixedly connected to the bottom of the square rod, and a rotating shaft is fixedly connected to the bottom center of the connecting plate. A first spring is sleeved on the outer wall of the rotating shaft, and one end of the first spring is fixedly connected to the inner wall of the frame.

[0005] The other end of the first spring is fitted to the connecting plate. The bottom of the frame is provided with a second circular hole that matches the rotating shaft. The bottom end of the rotating shaft passes through the inner cavity of the second circular hole and is fixedly connected to a protruding plate. A positioning circular plate is fitted to the top right side of the protruding plate. A connecting column is fixedly connected to the bottom center of the positioning circular plate. The connecting column is fixedly connected to the handcart door. A positioning hole is provided near the left side of the bottom of the positioning circular plate. Two positioning blocks that match the positioning hole are fixedly connected to the top of the protruding plate. One of the positioning blocks is inserted into the inner cavity of the positioning hole.

[0006] Furthermore, a sealing ring is fitted on the outer wall of the rotating shaft, and the sealing ring is fixedly connected to the bottom of the frame to prevent external dust from penetrating into the inner cavity of the frame through the second round hole.

[0007] Furthermore, a through groove is provided on the handcart compartment door, and a matching movable plate is slidably connected to the inner cavity of the through groove. The top of the movable plate is fitted with a positioning circular plate, and a sealing plate is fixedly connected to the bottom of the movable plate. Indicator plates are provided on both the left and right sides of the sealing plate, and the indicator plates are fixedly connected to the handcart compartment door.

[0008] The inner cavity of the through groove is equipped with a second spring, and the two ends of the second spring are fixedly connected to the inner wall of the through groove and the movable plate, respectively. By pressing the movable plate with the convex plate, the position of the sealing plate is adjusted so that the staff can easily observe and judge the locking status of the handcart door.

[0009] Furthermore, both sides of the convex plate are arc-shaped, which can reduce collision friction.

[0010] Furthermore, the vertical distance between the convex plate and the handcart door is greater than the thickness of the positioning block, which enables the positioning block to be inserted into and slid out of the positioning hole cavity to achieve locking and unlocking.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. By pressing the handle and pushing the positioning block out of the positioning hole cavity, then by rotating the handle and driving the square rod to rotate, the square rod can drive the rotating shaft to rotate, and drive the convex plate to rotate, so that the convex plate can be rotated 90 degrees, so that the convex plate is misaligned with the positioning round plate, thereby unlocking the handcart door. Conversely, when the handle is pressed and the convex plate is in contact with the handcart door, by rotating the handle in the opposite direction and driving the convex plate to squeeze the movable plate to move horizontally and in contact with the right indicator plate, the positioning block can be aligned with the positioning hole. Then, when the handle is released, the positioning block can be inserted back into the positioning hole, and the handcart door will be locked in conjunction with the operation.

[0013] 2. A sealing plate is fixedly connected to the bottom of the movable plate. When the handle is turned and the square rod is rotated, the square rod rotates and drives the shaft to rotate, which in turn drives the convex plate to rotate. The convex plate presses against the movable plate, thereby adjusting the position of the sealing plate so that the staff can easily observe and judge the locking status of the handcart door. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of this embodiment;

[0015] Figure 2 This is a schematic diagram of the positioning circular plate structure in this embodiment;

[0016] Figure 3 This is a schematic diagram of the convex plate structure in this embodiment;

[0017] Figure 4 for Figure 1Enlarged view of the structure at point A in the middle.

[0018] In the diagram: 1. Handcart compartment door; 2. Frame; 3. Square-hole round tube; 4. Square rod; 5. Handle; 6. Connecting plate; 7. Rotating shaft; 8. First spring; 9. Sealing ring; 10. Fixing ring; 11. Protruding plate; 12. Positioning round plate; 13. Connecting column; 14. Positioning hole; 15. Positioning block; 16. Through groove; 17. Movable plate; 18. Second spring; 19. Sealing plate; 20. Indicator plate. Detailed Implementation

[0019] Please see Figures 1 to 4 The present invention provides the following technical solution:

[0020] A central cabinet handcart compartment door interlocking mechanism includes a handcart compartment door 1 and a frame 2 disposed outside the handcart compartment door 1. The top of the frame 2 has a first circular hole, and a square hole tube 3 is rotatably connected to the inner cavity of the first circular hole. Two fixing rings 10 are sleeved and fixed on the outer wall of the square hole tube 3, and the two fixing rings 10 are respectively fitted to the outer wall and the inner wall of the frame 2. A matching square rod 4 is slidably connected to the inner cavity of the square hole tube 3, and a handle 5 is fixedly connected to the top of the square rod 4. A connecting plate 6 is fixedly connected to the bottom of the square rod 4, and a rotating shaft 7 is fixedly connected to the bottom center of the connecting plate 6. A first spring 8 is sleeved on the outer wall of the rotating shaft 7, and one end of the first spring 8 is fixedly connected to the inner wall of the frame 2.

[0021] The other end of the first spring 8 is fitted to the connecting plate 6. A second circular hole adapted to the rotating shaft 7 is opened at the bottom of the frame 2, and the bottom end of the rotating shaft 7 passes through the inner cavity of the second circular hole and is fixedly connected to a protruding plate 11. Both sides of the protruding plate 11 are arc-shaped to reduce collision friction. A sealing ring 9 is fitted onto the outer wall of the rotating shaft 7, and the sealing ring 9 is fixedly connected to the bottom of the frame 2 to prevent external dust from penetrating into the inner cavity of the frame 2 through the second circular hole. A positioning circular plate 12 is fitted to the top right side of the protruding plate 11, and the positioning... A connecting post 13 is fixedly connected to the bottom center of the circular plate 12. The connecting post 13 is fixedly connected to the handcart door 1. A positioning hole 14 is opened at the bottom of the positioning circular plate 12 near the left side. Two positioning blocks 15 that are adapted to the positioning hole 14 are fixedly connected to the top of the protruding plate 11. One of the positioning blocks 15 is inserted into the inner cavity of the positioning hole 14. The vertical distance between the protruding plate 11 and the handcart door 1 is greater than the thickness of the positioning block 15, so that the positioning block 15 can be inserted and slid out in the inner cavity of the positioning hole 14 to achieve locking and unlocking.

[0022] A through groove 16 is provided on the handcart compartment door 1, and a matching movable plate 17 is slidably connected to the inner cavity of the through groove 16. The top of the movable plate 17 is fitted with the positioning circular plate 12, and a sealing plate 19 is fixedly connected to the bottom of the movable plate 17. Indicator plates 20 are provided on both the left and right sides of the sealing plate 19, and the indicator plates 20 are fixedly connected to the handcart compartment door 1. A second spring 18 is provided in the inner cavity of the through groove 16, and the two ends of the second spring 18 are fixedly connected to the inner wall of the through groove 16 and the movable plate 17, respectively. The position of the sealing plate 19 is adjusted by the pressure of the movable plate 17 by the protruding plate 11, so as to facilitate the staff to observe and judge the locked state of the handcart compartment door 1.

[0023] Working principle: In use, this utility model applies downward pressure to the handle 5 and the square rod 4, and the rotating shaft 7 drives the convex plate 11 to move downward, thereby pushing the positioning block 15 out of the positioning hole 14. Then, by rotating the handle 5, the square rod 4 is rotated, which in turn drives the rotating shaft 7 to rotate, and thus the convex plate 11 is rotated. This allows the convex plate 11 to rotate 90 degrees, causing it to be misaligned with the positioning circular plate 12, thereby unlocking the vehicle door 1. Conversely, when the handle is pressed... 5. After the convex plate 11 is in contact with the handcart door 1, the handle 5 is rotated in the opposite direction to drive the convex plate 11 to press the movable plate 17 to move horizontally and to contact the right indicator plate 20. This allows the positioning block 15 to be aligned with the positioning hole 14. Then, when the handle 5 is released, the positioning block 15 can be inserted back into the positioning hole 14, and the handcart door 1 will be locked. During use, the operator only needs to observe which side of the indicator plate 20 the sealing plate 19 is in contact with to quickly determine the locking status of the handcart door 1.

[0024] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0025] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A centrally located cabinet handcart compartment door interlocking mechanism, comprising a handcart compartment door (1) and a frame (2) disposed outside the handcart compartment door (1), characterized in that: The top of the frame (2) is provided with a first circular hole, and the inner cavity of the first circular hole is rotatably connected to a square hole tube (3). The outer wall of the square hole tube (3) is fitted with two fixing rings (10), and the two fixing rings (10) are respectively fitted to the outer wall and the inner wall of the frame (2). The inner cavity of the square hole tube (3) is slidably connected to a matching square rod (4), and the top of the square rod (4) is fixedly connected to a handle (5). The bottom end of the square rod (4) is fixedly connected to a connecting plate (6), and the bottom center of the connecting plate (6) is fixedly connected to a rotating shaft (7). The outer wall of the rotating shaft (7) is fitted with a first spring (8), and one end of the first spring (8) is fixedly connected to the inner wall of the frame (2).

2. The interlocking mechanism for the door of the centrally located cabinet truck compartment as described in claim 1, characterized in that: The other end of the first spring (8) is fitted to the connecting plate (6). The bottom of the frame (2) is provided with a second round hole that is compatible with the rotating shaft (7). The bottom end of the rotating shaft (7) passes through the inner cavity of the second round hole and is fixedly connected to a protruding plate (11). A positioning round plate (12) is fitted to the top right side of the protruding plate (11). A connecting column (13) is fixedly connected to the bottom center of the positioning round plate (12). The connecting column (13) is fixedly connected to the handcart door (1). A positioning hole (14) is provided near the left side of the bottom of the positioning round plate (12). Two positioning blocks (15) that are compatible with the positioning hole (14) are fixedly connected to the top of the protruding plate (11). One of the positioning blocks (15) is inserted into the inner cavity of the positioning hole (14).

3. The interlocking mechanism for the centrally located cabinet handcart compartment door as described in claim 1, characterized in that: The outer wall of the rotating shaft (7) is fitted with a sealing ring (9), and the sealing ring (9) is fixedly connected to the bottom of the frame (2).

4. The interlocking mechanism for the centrally located cabinet handcart compartment door as described in claim 1, characterized in that: The handcart compartment door (1) is provided with a through groove (16), and the inner cavity of the through groove (16) is slidably connected to a matching movable plate (17). The top of the movable plate (17) is fitted with a positioning circular plate (12), and the bottom of the movable plate (17) is fixedly connected to a sealing plate (19). The left and right sides of the sealing plate (19) are provided with indicator plates (20), and the indicator plates (20) are fixedly connected to the handcart compartment door (1).

5. The interlocking mechanism for the centrally located cabinet handcart compartment door as described in claim 4, characterized in that: The inner cavity of the through groove (16) is provided with a second spring (18), and the two ends of the second spring (18) are fixedly connected to the inner wall of the through groove (16) and the movable plate (17) respectively.

6. The interlocking mechanism for the door of the centrally located cabinet truck compartment as described in claim 2, characterized in that: The left and right sides of the convex plate (11) are both arc-shaped.

7. The interlocking mechanism for the door of the centrally located cabinet truck compartment as described in claim 2, characterized in that: The vertical distance between the convex plate (11) and the handcart door (1) is greater than the thickness of the positioning block (15).

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