An emergency disconnection protection device for power line faults

Abstract

This utility model relates to the field of power line technology and discloses an emergency disconnection and protection device for power line faults, including a power supply box. A mounting plate is fixedly connected to one side of the power supply box, and a circuit breaker is fixedly connected to one side of the inner cavity of the power supply box. An interlocking assembly is provided inside the power supply box. This utility model, through an innovative interlocking assembly design, effectively solves the problem of accidental triggering of grounding switches in existing technologies. Specifically, when the circuit breaker detects a line fault and automatically trips, the tripping spindle drives a connecting rod to rotate a baffle, automatically releasing the obstruction of the grounding switch keyhole. Only then can the key be removed to operate the grounding switch. When the circuit breaker has not tripped, the baffle remains locked to the keyhole under the action of a spring, forming a mechanical forced interlock. This structure requires no external power supply; the purely mechanical linkage ensures the irreversible operation sequence and eliminates the risk of accidental closing of the grounding switch while energized.

Description

Technical Field

[0001] This utility model relates to the field of power line technology, and in particular to an emergency disconnection and protection device for power line faults. Background Technology

[0002] The power line fault emergency disconnection protection device is an important piece of equipment used to ensure the safe operation of the power system. It is mainly used to quickly disconnect the current when a power line fault occurs to prevent the fault from spreading, equipment damage, and personal injury. The device can detect various abnormalities in the line in a timely manner, such as short circuits, overloads, and voltage instability, by monitoring parameters such as current, voltage, and frequency of the power line in real time, and then automatically activate the protection mechanism. The core components of the device include a monitoring module, a control module, a circuit breaker, a protection relay, a communication module, and a power supply module.

[0003] Existing power line fault emergency disconnection protection devices still have some problems in use. For example, although most current protection devices use circuit breakers, protective relays, and grounding switches to protect power lines, in actual applications, grounding switches are easily affected by false triggering. This may interfere with the normal disconnection function of the protection device, making it impossible to perform the disconnection operation in a timely and effective manner, thus affecting the safety of the power system. Moreover, most existing protection devices lack an effective alarm system. After a power line fault occurs and the current is cut off, there is a lack of timely alarm and fault indication. As a result, after the circuit breaker is disconnected, the operator cannot immediately identify the location and type of the system fault, requiring a long troubleshooting and recovery process. This not only increases the complexity and workload of equipment maintenance, but may also delay the handling of faults, further affecting the reliability and operating efficiency of the power system.

[0004] To address these issues, we provide an emergency disconnection protection device for power line faults. Utility Model Content

[0005] The technical problem to be solved by this utility model is that the existing technology has the disadvantages of lacking protection for the grounding switch key and being inconvenient to investigate the location and type of system faults. Therefore, we propose an emergency disconnection protection device for power line faults.

[0006] To achieve the above objectives, this application adopts the following technical solution: an emergency disconnection protection device for power line faults, comprising a power supply box, a mounting plate fixedly connected to one side of the power supply box, and a circuit breaker fixedly connected to one side of the inner cavity of the power supply box; the inner cavity of the power supply box is provided with an interlocking assembly, which includes a tripping spindle located at the bottom of one side of the circuit breaker, a grounding box fixedly connected to the bottom of the inner cavity of the power supply box, a baffle located at the top of the inner cavity of the grounding box, and a connecting rod movably connected to the top side of the baffle via a rotating shaft, one end of the connecting rod being movably connected to the surface of the tripping spindle via a rotating shaft, thereby realizing the automatic opening and closing of the keyhole of the grounding switch through the interlocking assembly; the inner cavity of the power supply box is provided with an alarm assembly, which includes a mounting port located at the bottom of one side of the circuit breaker, a Hall sensor fixedly connected to the inner cavity of the mounting port, and an alarm fixedly connected to the top side of the inner cavity of the power supply box, thereby alerting personnel through the alarm assembly.

[0007] Preferably, the grounding box has a circular hole in its inner cavity, and a spring is fixedly connected to the inner cavity of the circular hole, with one end of the spring fixedly connected to one side of the baffle.

[0008] Preferably, a square groove is provided on one side of the inner cavity of the grounding box, and a grounding switch is fixedly connected to the inner cavity of the square groove.

[0009] Preferably, threaded holes are provided around the inner cavity of the mounting plate, and mounting bolts are threadedly connected to the inner cavity of the threaded holes.

[0010] Preferably, a door is movably connected to one side of the mounting plate via a hinge, and a viewing glass is fixedly connected to one side of the door.

[0011] Preferably, a keyhole is provided on one side of the inner cavity of the grounding switch, and a turning port is provided in the inner cavity of the grounding switch.

[0012] Preferably, the grounding box has a shielding opening at the top, and the inner cavity of the shielding opening is rotatably connected to one side of the baffle via a rotating shaft.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. This utility model effectively solves the problem of accidental triggering of grounding switches in the prior art through innovative interlocking component design. Specifically, when the circuit breaker detects a line fault and automatically trips, the tripping spindle drives the connecting rod to push the baffle to rotate, automatically releasing the obstruction of the grounding switch keyhole. Only then can the key be taken out to operate the grounding switch. When the circuit breaker has not tripped, the baffle remains locked to the keyhole under the action of the spring, forming a mechanical forced interlock. This structure requires no external power supply, and the pure mechanical linkage ensures that the operation sequence is irreversible, eliminating the risk of accidental closing of the grounding switch while energized. At the same time, the interlocking action is completed synchronously with the circuit breaker tripping, with a short response time, significantly improving the reliability and safety of power system fault isolation.

[0015] 2. This utility model achieves immediate status feedback and precise positioning after fault disconnection through an integrated alarm component. The circuit breaker tripping position is monitored in real time by a Hall sensor. Once tripping is triggered, the sensor signal synchronously activates the audible and visual alarm. The fault code can also be uploaded to the monitoring terminal through the communication module. Compared with the prior art, this device not only solves the defect of no alarm prompt after a fault, but also reverses the verification of the grounding switch operation compliance through the keyhole interlock status. This design integrates fault identification, location locking, and operation traceability functions, enabling maintenance personnel to quickly locate the fault point and greatly improving the operation and maintenance efficiency of the power system. Attached Figure Description

[0016] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts:

[0017] Figure 1 A perspective view of an emergency disconnection protection device for power line faults;

[0018] Figure 2 An exploded view of the power supply box and mounting plate in an emergency disconnection protection device for power line faults;

[0019] Figure 3 This is a schematic diagram of the internal structure of the power supply box in a power line fault emergency disconnection protection device.

[0020] Figure 4 An exploded view of the grounding box and baffle in an emergency disconnection protection device for power line faults;

[0021] Figure 5 This is an exploded view of the internal structure of the grounding box in a power line fault emergency disconnection protection device.

[0022] Legend: 1. Power supply box; 2. Mounting plate; 3. Circuit breaker; 4. Tripping spindle; 5. Grounding box; 6. Baffle; 7. Connecting rod; 8. Mounting port; 9. Hall sensor; 10. Alarm; 11. Round hole; 12. Spring; 13. Square groove; 14. Grounding switch; 15. Mounting bolt; 16. Box door; 17. Viewing glass; 18. Keyhole; 19. Turning port; 20. Shielding port. Detailed Implementation

[0023] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0024] Example 1

[0025] Please see Figures 1-5 This utility model relates to an emergency disconnection and protection device for power line faults, comprising a power supply box 1, which is installed at the required location on the power line. A connection port is provided on one side of the power supply box 1 to facilitate the connection of the internal wiring or structure to an external system. A mounting plate 2 is fixedly connected to one side of the power supply box 1, allowing it to be installed at the required location, typically embedded in a wall. A circuit breaker 3 is fixedly connected to one side of the inner cavity of the power supply box 1; the circuit breaker 3 is an existing structure and will not be described further. An interlocking assembly is provided inside the power supply box 1, including a tripping spindle 4 located at the bottom of one side of the circuit breaker 3, which automatically trips the circuit breaker when a power line fault occurs. A grounding box 5 is fixedly connected to the bottom of the inner cavity of the power supply box 1, which houses a grounding switch 14 and can seal the key and keyhole inside. A grounding box 5 is located at the top of the inner cavity of the grounding box 1. The baffle 6 of the part can be rotated to expose the grounding switch 14, the keyhole, and the key, facilitating the opening and closing of the grounding switch 14. A connecting rod 7 is movably connected to the top side of the baffle 6 via a rotating shaft. One end of the connecting rod 7 is movably connected to the surface of the tripping main shaft 4 via the rotating shaft. The interlocking assembly realizes the automatic opening and closing of the keyhole 18 of the grounding switch 14. An alarm assembly is installed in the inner cavity of the power supply box 1. The alarm assembly includes a mounting port 8 opened at the bottom of one side of the circuit breaker 3, a Hall sensor 9 fixedly connected to the inner cavity of the mounting port 8, the Hall sensor 9 is an existing structure that can monitor the tripping position of the circuit breaker in real time, and the output end of the Hall sensor 9 is unidirectionally electrically connected to the input end of the alarm 10, and an alarm 10 fixedly connected to the top side of the power supply box 1. The alarm 10 is an audible and visual alarm system that can emit light and sound to remind the staff. The alarm assembly is used to remind the staff.

[0026] Example 2

[0027] Please see Figures 1-5Based on Embodiment 1, the grounding box 5 has a circular hole 11 inside, and a spring 12 is fixedly connected inside the circular hole 11. The spring 12 inside the circular hole 11 can limit the position of the baffle 6 and ensure that the baffle 6 returns to its original position. One end of the spring 12 is fixedly connected to one side of the baffle 6. A square groove 13 is opened on one side of the grounding box 5. The square groove 13 is used to install the grounding switch 14. The grounding switch 14 is fixedly connected inside the square groove 13. Threaded holes are opened around the inner circumference of the mounting plate 2. The inner cavity of the threaded plate 2 is threaded with mounting bolts 15. The power supply box 1 can be installed in the required position by means of the mounting bolts 15. The mounting plate 2 is connected to a door 16 via a hinge on one side. A handle is fixedly connected to one side of the door 16 for easy opening and closing. A viewing glass 17 is fixedly connected to one side of the door 16. The viewing glass 17 is positioned so that the light emitted by the alarm 10 can be seen by outsiders. A keyhole 18 is provided on one side of the inner cavity of the grounding switch 14. The keyhole 18 is used to store the key of the grounding switch 14. A turning port 19 is provided in the inner cavity of the grounding switch 14. The switch is located inside the turning port 19. A shielding opening 20 is provided at the top of the grounding box 5. The inner cavity of the shielding opening 20 is rotatably connected to one side of the baffle 6 via a pivot.

[0028] When a power line fault occurs, the monitoring module of circuit breaker 3 detects an abnormal current or voltage signal. The control module immediately triggers the circuit breaker 3 to trip, and the tripping spindle 4 rotates accordingly. The tripping spindle 4 drives the baffle 6 to rotate around the shaft via the connecting rod 7, compressing the spring 12 and causing the baffle 6 to disengage from the keyhole 18 of the grounding box 5. At this time, the keyhole 18 is exposed, and maintenance personnel can take out the key and insert it into the turning port 19 of the grounding switch 14 to perform a closing operation, forcibly forming grounding protection. At the same time, the rotation of the tripping spindle 4 triggers the Hall effect sensor installed at the bottom of the circuit breaker 3. Sensor 9 transmits the trip signal to alarm 10, which immediately activates the audible and visual alarm, flashing a red light and sounding a buzzer. It also uploads the fault code to the monitoring terminal via the communication module. If circuit breaker 3 does not trip, baffle 6 keeps the keyhole 18 blocked by spring 12, and the mechanical interlock ensures that the grounding switch 14 cannot be operated under power. The entire process, from fault detection to interlock release and alarm triggering, is fully automated with a very short response time. The alarm status can be directly observed through the viewing glass 17, allowing maintenance personnel to quickly locate the fault and handle it safely.

[0029] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A power line fault emergency disconnection protection device, characterized in that, Includes a power supply box (1), a mounting plate (2) is fixedly connected to one side of the power supply box (1), and a circuit breaker (3) is fixedly connected to one side of the inner cavity of the power supply box (1). The power supply box (1) is equipped with an interlocking assembly. The interlocking assembly includes a tripping spindle (4) located at the bottom of one side of the circuit breaker (3), a grounding box (5) fixedly connected to the bottom of the power supply box (1), a baffle (6) located at the top of the grounding box (5), and a connecting rod (7) movably connected to the top side of the baffle (6) via a rotating shaft. One end of the connecting rod (7) is movably connected to the surface of the tripping spindle (4) via a rotating shaft. The interlocking assembly enables the automatic opening and closing of the keyhole (18) of the grounding switch (14). The power supply box (1) is equipped with an alarm component. The alarm component includes an installation port (8) at the bottom of one side of the circuit breaker (3), a Hall sensor (9) fixedly connected to the cavity of the installation port (8), and an alarm (10) fixedly connected to the top side of the power supply box (1). The alarm component is used to remind staff.

2. The power line fault emergency disconnection protection device according to claim 1, characterized in that: The grounding box (5) has a circular hole (11) inside. A spring (12) is fixedly connected inside the circular hole (11). One end of the spring (12) is fixedly connected to one side of the baffle (6).

3. The power line fault emergency disconnection protection device according to claim 1, characterized in that: A square groove (13) is provided on one side of the inner cavity of the grounding box (5), and a grounding switch (14) is fixedly connected to the inner cavity of the square groove (13).

4. The power line fault emergency disconnection protection device according to claim 1, characterized in that: The mounting plate (2) has threaded holes around its inner cavity, and mounting bolts (15) are threaded into the inner cavity of the threaded holes.

5. The power line fault emergency disconnection protection device according to claim 4, characterized in that: The mounting plate (2) is movably connected to a door (16) via a hinge on one side, and a viewing glass (17) is fixedly connected to one side of the door (16).

6. The power line fault emergency disconnection protection device according to claim 3, characterized in that: The grounding switch (14) has a keyhole (18) on one side of its inner cavity, and a screw hole (19) is provided in the inner cavity of the grounding switch (14).

7. The power line fault emergency disconnection protection device according to claim 1, characterized in that: The grounding box (5) has a shielding opening (20) at the top, and the inner cavity of the shielding opening (20) is rotatably connected to one side of the baffle (6) via a rotating shaft.

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