A novel manual priority interlocking device for grounding switch operation

Abstract

This utility model discloses a novel manual priority interlocking device for grounding switch operation, including a side plate. The device features a limit switch fixed to a bracket, with the bracket, servo motor, and slider plate all bolted to the side wall of the side plate. A manual priority padlock is fixed to the front of the side plate. The grounding switch operating shaft passes through the servo motor and is fixed to the inner side of the side plate via the slider plate. When the padlock is in the closed state, the microswitch contact of the limit switch is pressed into the inner side of the side plate, closing the limit switch and energizing the servo motor. When the manual priority padlock is opened, the limit switch contact automatically pops out from the outer side of the side plate, disconnecting the limit switch and disconnecting the servo motor power. This utility model is characterized by complete reliability, flexible linkage, simple structure and operation, and the ability to allow only manual or electric operation of the grounding switch at any given time.

Description

Technical Field

[0001] This utility model belongs to the technical field of armored withdrawable AC metal-enclosed switchgear, and in particular relates to an interlocking device that prioritizes manual operation of a grounding switch. Background Technology

[0002] Armored withdrawable AC metal-enclosed switchgear is frequently used in industrial production. Grounding switch operation and interlocking are crucial components of the switchgear's five-proof system. Switchgear equipped with electrically operated grounding switches typically requires both manual and electric operation modes. However, if manual operation can be performed simultaneously with electric operation, the lack of anti-misoperation mechanisms greatly increases the risk of accidents. Furthermore, if manual operation of the grounding switch is required but the electric operating mechanism is not disconnected, misoperation is highly likely, leading to accidents and potentially endangering the lives of workers. Therefore, it is paramount to disconnect the electric operating mechanism when manually operating the switch; that is, to prioritize manual operation. Utility Model Content

[0003] The purpose of this utility model is to improve upon the shortcomings of existing technologies by providing a new type of grounding switch operation manual priority interlocking device that is safe, reliable, flexible in linkage, simple in structure and operation, and allows only manual or electric operation of the grounding switch at the same time.

[0004] The purpose of this utility model is achieved as follows: A novel manual priority interlocking device for grounding switch operation includes a side plate. The device is characterized by a limit switch fixed to a bracket, and the bracket, servo motor, and slider plate are all bolted to the side wall of the side plate. A manual priority padlock device is fixed to the front of the side plate. The grounding switch operating shaft passes through the servo motor and is fixed to the inner side of the side plate via the slider plate. When the padlock device is in the closed padlock state, the microswitch contact of the limit switch is pressed into the inner side of the side plate, closing the limit switch and energizing the servo motor. When the manual priority padlock device is opened, the limit switch contact automatically pops out to the outside of the side plate, disconnecting the limit switch and disconnecting the servo motor power.

[0005] Compared with existing technologies, this utility model has the following significant features and positive effects: This utility model uses a limit switch bracket and a servo motor fixed to the side plate, with the limit switch fixed on the bracket. A manual priority padlock device is used, and a slider plate is fixed to the front column of the side plate. The grounding switch operating shaft passes through the servo motor and is fixed to the side plate via the slider plate. When the padlock device is opened, the microswitch contact automatically pops out of the side plate, and simultaneously the microswitch disconnects, immediately disconnecting the motor's operating power, rendering electric operation ineffective and enabling manual priority operation. When the padlock device is closed, the microswitch contact is pressed into the inside of the side plate, closing the microswitch and energizing the servo motor for electric operation. Simultaneously, the padlock device blocks the manual operation hole, preventing manual operation and making operation safer and more reliable. This utility model has a simple structure, is easy to operate, and allows for both manual and electric operation modes, but only one mode can be used at a time. Attached Figure Description

[0006] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0007] Figure 1 This is a schematic diagram of one structure of the present utility model.

[0008] Figure 2 for Figure 1 Side view.

[0009] In the diagram: 1. Side plate, 2. Limit switch, 3. Grounding switch operating shaft, 4. Manual priority padlock device, 5. Sliding plate, 6. Bracket, 7. Servo motor. Detailed Implementation

[0010] A novel manual priority interlocking device for grounding switch operation, referring to Figure 1 , Figure 2Limit switch 2 is fixed to bracket 6. Bracket 6, servo motor 7, and slider plate 5 are all fixed to the side wall of side plate 1 by bolts. Manual priority padlock device 4 is fixed to the front of side plate. Grounding switch operating shaft 3 passes through servo motor 7 and is fixed to the inside of side plate 1 by slider plate 5. Under normal circumstances, the grounding switch is electrically operated: when manual priority padlock device 4 is in the closed padlock state, the microswitch contact of limit switch 2 is pressed into the inside of side plate 1, limit switch 2 is closed, servo motor 7 is energized, and servo motor 7 can drive grounding switch operating shaft 3 to move. This allows for electric operation of the grounding switch. Simultaneously, the manual priority padlock device 4 blocks the manual operation hole of the slider plate 5, preventing manual operation. When the electric operation of the grounding switch fails or manual operation is required, the manual priority padlock device 4 is first opened, and the contacts of the limit switch 2 automatically pop out of the side plate 1. At the same time, the limit switch 2 is disconnected, the operating power of the servo motor 7 is disconnected, and the servo motor 7 cannot drive the grounding switch operating shaft 3 to move, thus preventing electric operation. At the same time, the baffle on the slider plate 5 can be pressed down, exposing the manual operation hole, enabling manual operation of the grounding switch.

Claims

1. A novel manual priority interlocking device for grounding switch operation, comprising a side plate, characterized in that a limit switch is fixed on a bracket, the bracket, a servo motor, and a slider plate are all fixed to the side wall of the side plate by bolts, a manual priority padlock device is fixed on the front of the side plate, the grounding switch operating shaft passes through the servo motor and is fixed to the inner side of the side plate by the slider plate, when the padlock device is in the closed padlock state, the micro switch contact of the limit switch is pressed into the inner side of the side plate, the limit switch is closed, and the servo motor is energized, when the manual priority padlock device is opened, the limit switch contact automatically pops out of the outer side of the side plate, the limit switch is opened, and the servo motor power is disconnected.

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