High-performance temporary grounding state detection and early warning device

Abstract

The application relates to the technical field of temporary grounding devices, in particular to a high-performance temporary grounding state detection and early warning device, which comprises an insulating grounding rod, a grounding head arranged at the upper end of the insulating grounding rod, a wiring board arranged at the rear side of the grounding head, a connecting piece arranged on the wiring board through bolts, a connecting line arranged at the lower end of the connecting piece, a state detection box plate arranged at the lower end of the connecting line, a central controller arranged in the state detection box plate, a Rogowski coil and a current coil arranged on the connecting line in an up-down distribution mode at the rear side of the central controller, an integrator connected to the signal output end of the current coil, the integrator being used for restoring the waveform of the measured current, data processing modules connected to the signal output ends of the Rogowski coil and the integrator, a voltage coil connected in parallel to the data processing modules, and current measurement data output received by the data processing modules being input into the central controller; the application has the advantages of safety, reliability and the capability of timely detecting the real-time grounding state of the temporary grounding device.

Description

Technical Field

[0001] This invention relates to the field of temporary grounding device technology, specifically a high-performance temporary grounding status detection and early warning device. Background Technology

[0002] Temporary grounding wires are a safety measure used in power system maintenance and repair. They are used to ground energized parts of faulty equipment or power systems to ensure personal safety and safe operation of equipment. During power system maintenance, to protect maintenance personnel from electric shock and other electrical hazards, it is necessary to ground energized equipment and power systems. A temporary grounding wire typically consists of a single conductor, with one end connected to the equipment to be grounded and the other end connected to a safe location or grounding device. Temporary grounding wires serve as a safety barrier for maintenance personnel and are a lifeline for power workers. During maintenance, they prevent induced voltage from adjacent high-voltage lines or equipment on de-energized lines or equipment, or sudden power surges from de-energized lines that could harm personnel. They also discharge residual charge from de-energized lines and equipment, ensuring the safety of maintenance workers.

[0003] Currently, most existing temporary grounding wires are directly connected during maintenance and use, which cannot effectively enable real-time detection of the grounding status. At the same time, it is impossible to accurately determine whether the grounding device meets the grounding requirements during use, which can easily cause difficulties in the maintenance process of power equipment and create great safety hazards.

[0004] To address the aforementioned issues, we propose a high-performance temporary grounding status detection and early warning device. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a high-performance temporary grounding status detection and early warning device that can detect the real-time grounding status of temporary grounding devices in a timely manner, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-performance temporary grounding status detection and early warning device, comprising an insulating grounding rod, a grounding head at the upper end of the insulating grounding rod, a terminal block at the rear of the grounding head, a connector on the terminal block by bolts, a connecting wire at the lower end of the connector, a status detection box at the lower end of the connecting wire, a central controller inside the status detection box, a Rogowski coil and a current coil wound vertically and vertically on the rear of the central controller on the connecting wire, an integrator connected to the signal output terminal of the current coil, the integrator being used to reconstruct the waveform of the measured current, a data processing module connected to the signal output terminals of both the Rogowski coil and the integrator, a voltage coil connected in parallel to the data processing module, and the current measurement data received by the data processing module being output and connected to the central controller.

[0007] Preferably, a limiting plate is provided at the lower end of the status detection box plate, and a connecting sleeve connected to the connecting line is provided inside the limiting plate. A grounding wire connector is provided at the upper end of the connecting sleeve, and a grounding rod is connected to the grounding wire connector through a wire. The grounding rod is buried underground.

[0008] Preferably, both the status detection box plate and the limiting plate are fixedly provided with the outer surface of the upper end of the insulating grounding rod.

[0009] Preferably, the upper end of the grounding wire connector inside the upper part of the connecting sleeve is connected to the connecting wire.

[0010] Preferably, the upper and lower ends of the connecting sleeve are further provided with wiring conductors. The wiring conductor at the upper end of the connecting sleeve is attached to the grounding wire connector, and the wiring conductor at the lower end of the connecting sleeve is attached to the grounding rod. The two wiring conductors are connected to form a loop between the grounding wire connector and the grounding rod through a wire. The voltage coil is sleeved on the outside of the wire of the loop.

[0011] Preferably, the grounding head includes a U-shaped clamping plate and a pressure plate disposed inside the U-shaped clamping plate. A bearing seat is disposed at the lower end of the pressure plate, and a screw is movably disposed inside the bearing seat. A fixing plate is disposed at the lower end of the screw, and the fixing plate is disposed at the upper end of the insulating grounding rod.

[0012] Preferably, a threaded connecting sleeve is embedded and fixed at the lower end of the U-shaped card plate, and a screw is provided in the threaded connecting sleeve.

[0013] Preferably, a conductive contact block is embedded in the upper end of the U-shaped card plate corresponding to the pressure plate, and the conductive contact block is connected to the terminal block in the U-shaped card plate through a wire harness.

[0014] Preferably, the status detection box plate is provided with fixing plates at both the upper and lower ends near the insulating grounding rod, and the connecting wire is fixed inside the fixing plates.

[0015] Preferably, the central controller inside the status detection box is connected via a wiring harness to a communication module located at the upper end of the status detection box and a display located at the lower end of the communication module. The central controller is also connected via a wiring harness to an early warning module inside the status detection box. The early warning module includes an early warning light located at the lower end of the display and a speaker located at the lower end of the early warning light.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention arranges a terminal block on the rear side of the grounding head on the insulating grounding rod, and installs a connector through the terminal block. The connector is connected to a connecting sleeve on the limiting plate through a status detection box plate fixed on the top side of the insulating grounding rod, and is connected to a grounding wire connector at the top of the connecting sleeve. Furthermore, the grounding rod is connected through the grounding wire connector, which facilitates status detection and early warning of temporary grounding devices suspended on the conductor. This allows for accurate judgment of whether the grounding device meets the grounding requirements, improving the safety and reliability of temporary grounding device installation and enhancing the safety of temporary grounding devices. For temporary grounding devices that do not meet the grounding resistance standard requirements, safety hazards can be eliminated immediately. This enriches the application development of online status detection and early warning for temporary grounding devices, especially in the background data processing, enabling the auxiliary functions of accident retrieval, historical data curves, and grounding hazard investigation in the maintenance of temporary grounding device equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the grounding head structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the grounding status detection box of the present invention; Figure 4 yes Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a structural block diagram of the high-performance temporary grounding status detection and early warning device of the present invention.

[0018] The diagram is labeled as follows: 1. Insulating grounding rod; 2. Grounding head; 3. Terminal block; 4. Connector; 5. Connecting wire; 6. Status detection box; 7. Connecting sleeve; 8. Limiting plate; 9. Fixing plate; 10. Screw; 11. Pressure plate; 12. Communication module; 13. Display; 14. Warning light; 15. Speaker; 16. U-shaped clamp; 17. Threaded connecting sleeve; 18. Conductive contact block; 19. Bearing seat; 20. Fixing plate; 21. Current coil; 22. Rogowski coil; 23. Central controller; 24. Voltage coil; 25. Grounding wire connector; 26. Wiring conductor; 27. Warning module; 28. Data processing module; 29. ​​Integrator. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. Example 1

[0020] like Figure 1-4 As shown, this embodiment discloses a high-performance temporary grounding status detection and early warning device, which includes an insulating grounding rod 1, a grounding head 2 at the upper end of the insulating grounding rod 1, a wiring board 3 at the rear of the grounding head 2, a connector 4 on the wiring board 3 by bolts, a connecting wire 5 at the lower end of the connector 4, a status detection box 6 at the lower end of the connecting wire 5, a central controller 23 inside the status detection box 6, a Rogowski coil 22 and a current coil 21 respectively wound vertically on the connecting wire 5 at the rear of the central controller 23, the signal output terminal of the current coil 21 is also connected to an integrator 29, the integrator 29 is used to reconstruct the waveform of the measured current, the signal output terminals of the Rogowski coil 22 and the integrator 29 are both connected to a data processing module 28, the data processing module 28 is also connected in parallel with a voltage coil 24, the current measurement data received by the data processing module 28 is output and connected to the central controller 23; In this embodiment, a limiting plate 8 is also provided at the lower end of the state detection box plate 6. A connecting sleeve 7 connected to the connecting line 5 is provided inside the limiting plate 8. A grounding wire connector 25 is provided at the upper end of the connecting sleeve 7. The grounding wire connector 25 is connected to a grounding rod through a wire. The grounding rod is buried underground. Both the state detection box plate 6 and the limiting plate 8 are fixedly provided with the upper outer surface of the insulating grounding rod 1. The upper end of the grounding wire connector 25 inside the connecting sleeve 7 is connected to the connecting line 5. The upper and lower ends of the connecting sleeve 7 are also provided with wiring conductors 26. The wiring conductor 26 at the upper end of the connecting sleeve 7 is attached to the grounding wire connector 25. The wiring conductor 26 at the lower end of the connecting sleeve 7 is attached to the grounding rod. The wiring conductors 26 at both ends are connected to form a loop between the grounding wire connector 25 and the grounding rod through a wire. The voltage coil 24 is sleeved on the outside of the wire in the loop to realize the measurement of grounding resistance.

[0021] In this embodiment, the grounding head 2 includes a U-shaped clamping plate 16 and a pressure plate 11 disposed inside the U-shaped clamping plate 16. A bearing seat 19 is disposed at the lower end of the pressure plate 11, and a screw 10 is movably disposed inside the bearing seat 19. A fixing plate 9 is disposed at the lower end of the screw 10 and is disposed at the upper end of the insulating grounding rod 1. A threaded connecting sleeve 17 is embedded and fixed at the lower end of the U-shaped clamping plate 16, and the screw 10 is threaded inside the threaded connecting sleeve 17. A conductive contact block 18 is embedded in the upper end of the U-shaped clamping plate 16 corresponding to the pressure plate 11. The conductive contact block 18 is connected to the terminal block 3 in the U-shaped clamping plate 16 through a wire harness, and is used to allow the cable on the line to pass directly through the U-shaped clamping plate 16. By rotating the insulating grounding rod 1, the screw 10 in the threaded connecting sleeve 17 is driven to rotate at the lower end of the pressure plate 11, so that the pressure plate 11 moves towards the conductive contact block 18 and presses the cable.

[0022] In this embodiment, the status detection box plate 6 is equipped with fixing plates 20 at both the upper and lower ends near the insulating grounding rod 1. The connecting wire 5 is fixed inside the fixing plates 20. The central controller 23 inside the status detection box plate 6 is connected to a communication module 12 located at the upper end of the status detection box plate 6 and a display 13 located at the lower end of the communication module 12 via a wiring harness. The central controller 23 is also connected to an early warning module 27 inside the status detection box plate 6 via a wiring harness. The early warning module 27 includes an early warning light 14 located at the lower end of the display 13 and a speaker 15 located at the lower end of the early warning light 14, for communication. A Rogowski coil 22 is installed inside the status detection box 6 via connecting line 5. The signal output terminal of the Rogowski coil 22 is connected to an integrator 29, which restores the waveform of the measured current. The output signal of the integrator 29 is connected to the data processing module 28. The central controller 23 issues an alarm signal based on a set threshold. If the measured value exceeds the set threshold, the alarm module 27 connects to the warning light 14 and speaker 15 to issue an alarm signal. The data is displayed on the display 13 and sent to the background for display, storage, or maintenance and detection tracking via the communication module 12. Example 2

[0023] like Figure 1-5 As shown, this embodiment discloses a high-performance temporary grounding status detection and early warning device, which includes an insulating grounding rod 1, a grounding head 2 at the upper end of the insulating grounding rod 1, a terminal block 3 at the rear of the grounding head 2, a connector 4 on the terminal block 3 by bolts, a connecting wire 5 at the lower end of the connector 4, a status detection box 6 at the lower end of the connecting wire 5, a central controller 23 inside the status detection box 6, a Rogowski coil 22 and a current coil 21 respectively wound vertically and vertically on the rear of the central controller 23 on the connecting wire 5, an integrator 29 connected to the signal output terminal of the current coil 21, the integrator 29 being used to reconstruct the waveform of the measured current, and the Rogowski coil... Both coil 22 and integrator 29 have their signal output terminals connected to a data processing module 28. The data processing module 28 also has a voltage coil 24 connected in parallel. The current measurement data received by the data processing module 28 is output to the central controller 23. A limit plate 8 is also provided at the lower end of the status detection box 6. A connecting sleeve 7 connected to the connecting line 5 is provided inside the limit plate 8. A grounding wire connector 25 is provided at the upper end of the connecting sleeve 7. The grounding wire connector 25 is connected to a grounding rod via a wire, and the grounding rod is buried underground. Connecting conductors 26 are also provided at both the upper and lower ends of the connecting sleeve 7. The connecting conductor 26 at the upper end of the connecting sleeve 7 is attached to the grounding wire connector 25. The lower end of the inner sleeve 7 has a connecting conductor 26 attached to the grounding rod. The two ends of the connecting conductor 26 are connected to form a circuit between the grounding wire connector 25 and the grounding rod through a wire. The voltage coil 24 is sleeved on the outside of the circuit wire. The grounding head 2 includes a U-shaped clamping plate 16 and a pressure plate 11 set inside the U-shaped clamping plate 16. The lower end of the pressure plate 11 is provided with a bearing seat 19. A screw 10 is movably arranged in the bearing seat 19. The lower end of the screw 10 is provided with a fixing plate 9. The fixing plate 9 is set on the upper end of the insulating grounding rod 1. The lower end of the U-shaped clamping plate 16 is embedded and fixed with a threaded connecting sleeve 17. The screw 10 is threaded inside the threaded connecting sleeve 17. The upper end of the U-shaped clamping plate 16 corresponds to the pressure plate 11. The state detection box 6 is equipped with a conductive contact block 18, which is connected to the terminal block 3 via a wire harness within the U-shaped card plate 16. Fixing plates 20 are installed at both the upper and lower ends of the state detection box 6 near the insulating grounding rod 1, and connecting wires 5 are fixed within the fixing plates 20. The central controller 23 inside the state detection box 6 is connected via a wire harness to a communication module 12 located at the upper end of the state detection box 6 and a display 13 located at the lower end of the communication module 12. The central controller 23 is also connected via a wire harness to an early warning module 27 within the state detection box 6. The early warning module 27 includes an early warning light 14 located at the lower end of the display 13 and a speaker 15 located at the lower end of the early warning light 14.

[0024] In this embodiment, temporary grounding current measurement is mainly performed using a Rogowski coil 22. The Rogowski coil 22 is placed outside the connecting wire 5. The Rogowski coil 22 is a hollow toroidal coil. The alternating current flowing through the grounding wire will generate an alternating magnetic field around the connecting wire 5, thereby inducing an alternating voltage signal in the coil that is proportional to the current transformation ratio. The output voltage of the coil can be expressed by the formula Vout=Mdi / dt, where M is the mutual inductance of the coil and di / dt is the change in current. The voltage signal output by the Rogowski coil 22 is integrated by the integrator 29. The integrated voltage signal can accurately reproduce the waveform and amplitude of the measured current signal.

[0025] In this embodiment, the temporary grounding resistance is measured mainly by voltage coil 24. The connection end of the connecting sleeve 7 and the grounding rod is connected by a conductor to form the test circuit. Voltage coil 24 is sleeved outside the circuit wire. The central controller 23 sends a remote control command to provide an excitation signal to the central controller 23 and induces an electric potential E in the test circuit. Under the action of electric potential E, a current I will be generated in the test circuit. The central controller 23 measures E and I and calculates the test resistance R by formula I=E / R.

[0026] Working principle: In use, a terminal block 3 is arranged on the rear side of the grounding head 2 at the upper end of the insulating grounding rod 1. A connector 4 is installed through the terminal block 3, and a connecting wire 5 is provided at the lower end of the connector 4. The connecting wire 5 is connected to the connecting sleeve 7 provided on the limit plate 8 through the status detection box plate 6 fixed on the top side of the insulating grounding rod 1, and is connected to the grounding wire connector 25 provided at the top of the connecting sleeve 7. A grounding rod is connected through the grounding wire connector 25. At the same time, a Rogowski coil 22 is sleeved inside the status detection box plate 6 through the connecting wire 5. The signal output terminal of the Rogowski coil 22 is connected to the integrator 29. The integrator 29 restores the waveform of the measured current. The output signal of the integrator 29 is connected to the data processing module 28, and is controlled by the central control. The controller 23, based on a set threshold, will issue an alarm signal via the warning light 14 and speaker 15 connected to the warning module 27 if the measured value exceeds the set threshold. The signal will also be displayed on the display 13 and sent to the backend for display, storage, or maintenance / detection tracking via the communication module 12. Finally, the signal is connected to the grounding rod via the internal connecting wire 5 of the connecting sleeve 7 and the wiring conductors 26 at both ends of the grounding rod, forming a loop. A voltage coil 24 is sheathed in the loop wire. The central controller 23 provides an excitation signal to the voltage coil 24, inducing a potential and generating a current in the loop. The central controller 23 can calculate the resistance value of the grounding rod based on the potential and current values; set the resistance value alarm parameters according to the grounding standard requirements; and determine whether the resistance value is qualified.

[0027] The foregoing has shown and described the basic principles and main features of the present invention and its advantages. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects. The scope of the present invention is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all changes falling within the meaning and scope of the equivalents of the claims be included within the present invention, and no reference numerals in the claims should be regarded as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-performance temporary grounding status detection and early warning device, comprising an insulating grounding rod (1), characterized in that: The insulating grounding rod (1) is provided with a grounding head (2) at the upper end. A terminal block (3) is provided on the rear side of the grounding head (2). A connector (4) is provided on the terminal block (3) by bolts. A connecting line (5) is provided at the lower end of the connector (4). A status detection box (6) is provided at the lower end of the connecting line (5). A central controller (23) is provided inside the status detection box (6). A Rogowski coil (22) and a current coil (21) are respectively wound vertically on the rear side of the central controller (23) on the connecting line (5). An integrator (29) is also connected to the signal output terminal of the current coil (21). The integrator (29) is used to restore the waveform of the measured current. A data processing module (28) is connected to the signal output terminals of the Rogowski coil (22) and the integrator (29). A voltage coil (24) is also provided in parallel with the data processing module (28). The current measurement data received by the data processing module (28) is output and connected to the central controller (23).

2. The high-performance temporary grounding status detection and early warning device according to claim 1, characterized in that: The lower end of the status detection box plate (6) is also provided with a limiting plate (8). The limiting plate (8) is provided with a connecting sleeve (7) connected to the connecting line (5). The upper end of the connecting sleeve (7) is provided with a grounding wire connector (25). The grounding wire connector (25) is connected to a grounding rod through a wire. The grounding rod is buried underground.

3. The high-performance temporary grounding status detection and early warning device according to claim 2, characterized in that: The status detection box (6) and the limiting plate (8) are both fixedly provided with the outer surface of the upper end of the insulating grounding rod (1).

4. The high-performance temporary grounding status detection and early warning device according to claim 2, characterized in that: The upper end of the grounding wire connector (25) inside the connecting sleeve (7) is connected to the connecting wire (5).

5. The high-performance temporary grounding status detection and early warning device according to claim 4, characterized in that: The upper and lower ends of the connecting sleeve (7) are also provided with wiring conductors (26). The wiring conductor (26) at the upper end of the connecting sleeve (7) is attached to the grounding wire connector (25), and the wiring conductor (26) at the lower end of the connecting sleeve (7) is attached to the grounding rod. The wiring conductors (26) at both ends are connected to form a loop between the grounding wire connector (25) and the grounding rod through a wire. The voltage coil (24) is sleeved on the outside of the wire of the loop.

6. The high-performance temporary grounding status detection and early warning device according to claim 1, characterized in that: The grounding head (2) includes a U-shaped clamping plate (16) and a pressure plate (11) disposed inside the U-shaped clamping plate (16). A bearing seat (19) is provided at the lower end of the pressure plate (11). A screw (10) is movably disposed inside the bearing seat (19). A fixing plate (9) is provided at the lower end of the screw (10). The fixing plate (9) is disposed at the upper end of the insulating grounding rod (1).

7. The high-performance temporary grounding status detection and early warning device according to claim 6, characterized in that: The lower end of the U-shaped card plate (16) is embedded with a threaded connecting sleeve (17), and the threaded connecting sleeve (17) is provided with a screw (10) in its internal thread.

8. The high-performance temporary grounding status detection and early warning device according to claim 6, characterized in that: The upper end of the U-shaped card plate (16) is provided with a conductive contact block (18) embedded in the pressure plate (11). The conductive contact block (18) is connected to the terminal block (3) in the U-shaped card plate (16) through a wire harness.

9. The high-performance temporary grounding status detection and early warning device according to claim 1, characterized in that: The status detection box plate (6) is provided with fixing plates (20) at both the upper and lower ends near the insulating grounding rod (1), and the connecting line (5) is fixed in the fixing plate (20).

10. The high-performance temporary grounding status detection and early warning device according to claim 9, characterized in that: The central controller (23) inside the status detection box (6) is connected via a wiring harness to a communication module (12) located at the upper end of the status detection box (6) and a display (13) located at the lower end of the communication module (12). The central controller (23) is also connected via a wiring harness to an early warning module (27) inside the status detection box (6). The early warning module (27) includes an early warning light (14) located at the lower end of the display (13) and a speaker (15) located at the lower end of the early warning light (14).

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