Grounding device with functions of induced electricity discrimination and rapid arc extinguishing

Abstract

The utility model discloses a grounding device with induced electricity discrimination and rapid arc extinguishing functions, which is characterized by comprising a high-voltage hook, an insulating rod, an inductance coil, an electricity testing device, a grounding clamp and a cable, the electricity testing device is installed on the high-voltage hook and used for sensing whether a high-voltage line is electrified or not. One end of the inductance coil is electrically connected with the high-voltage hook through a cable, and the other end of the inductance coil is electrically connected with the grounding clamp through a cable; the insulating rod is connected with the high-voltage hook and is used for lifting the high-voltage hook to hang the high-voltage hook on a power transmission line; when in use, the grounding clamp is clamped on a grounding wire and is used for reliably grounding a cable. According to the utility model, large arc light generated when a common grounding wire is grounded can be effectively inhibited, the device can effectively distinguish induced electricity from normal electrified equipment, the electrified condition of a line is detected in time, and the quality and efficiency of safety production are comprehensively improved.

Description

Technical Field

[0001] This utility model discloses a grounding device with induced current detection and rapid arc extinguishing, belonging to the technical field of power safety devices. Background Technology

[0002] Power grid construction is entering a phase of high-quality advancement, with a large number of 220 kV and above grid reinforcement projects being steadily implemented. This has led to increasingly tight space in high-voltage transmission channels and a growing number of overhead lines crossing each other. When one of two crossing lines is out of service while the other continues to operate, voltage and current will be induced on the out-of-service line due to electrostatic and electromagnetic induction from the operating line. If the outgoing switch of the out-of-service line needs maintenance, a grounding wire must be manually installed to ensure reliable grounding at both ends of the line and the safety of maintenance personnel. However, due to the large induced current on the line, large arcs can easily be generated during the installation and removal of grounding wires, seriously affecting the safety of the grounding process.

[0003] To determine whether high-voltage equipment is energized, the traditional method involves indirectly measuring the secondary terminals. To ensure real-time and accurate energization and prevent misjudgments that could lead to injury, a charge-type high-voltage detector has been developed. This detector contains a metal ball connected to a metal rod. The rod, after processing, passes through a rubber stopper. Two thin metal foils are fixed to the lower end of the stopper and are used to test voltage and current. During use, the object being measured must be brought into electrical contact with the detector's contacts. If the object is energized, the detector transmits the voltage to the foils. Depending on the voltage, the foils open at different angles, which the detector converts into a numerical value displayed on its screen, achieving direct contact voltage detection. However, in practical applications, high-voltage equipment, such as high-voltage cables, requires insulation protection. These cables are often wrapped with insulating rubber, making traditional detectors ineffective for detecting energization. Utility Model Content

[0004] The purpose of this invention is to provide a grounding device with induced current detection and rapid arc extinguishing capabilities. This circuit can perform non-contact testing on the energization of electrical equipment such as high-voltage cables and busbars with insulation layers, determining whether the high-voltage equipment is energized. This allows for real-time alerts to maintenance personnel, preventing maintenance operations while the equipment is energized and ensuring personal safety. This invention can effectively suppress the large arc light generated by ordinary grounding wires during grounding, enabling the device to effectively distinguish between induced current and normally energized equipment, promptly detecting the energization status of lines, and comprehensively improving the efficiency and effectiveness of safe production.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A grounding device with induced current detection and rapid arc extinguishing capabilities includes a high-voltage hook, an insulating rod, an inductor coil, a voltage detector, a grounding clamp, and a cable. The voltage detector is mounted on the high-voltage hook and is used to detect whether the high-voltage line is energized. One end of the inductor coil is electrically connected to the high-voltage hook via a cable through the metal housing of the voltage detector, and the other end is electrically connected to the grounding clamp via a cable. The insulating rod is connected to the high-voltage hook and is used to lift the high-voltage hook and attach it to the transmission line. The grounding clamp is used to clamp onto the grounding wire to reliably ground the cable.

[0007] Preferably, the high-voltage hook is a bent hook made of metal material, which can be attached to the power transmission line.

[0008] Preferably, the above-mentioned insulating rod uses 3-6 link rods, and the insulation withstand voltage level can reach 220kV.

[0009] Preferably, the inductor coil is an adjustable-turn suppressor current inductor coil. By controlling the taps of the inductor coil, the inductance value is changed, thereby achieving effective control of the high-voltage grounding lead current. There is no nonlinear harmonic interference during use.

[0010] Preferably, the above-mentioned voltage testing device includes metal electrodes, a voltage follower, a voltage acquisition circuit, a 9V alkaline battery, a microprocessor module, a switching circuit, a transistor circuit, a buzzer, a light-emitting diode, a step-down module, a circular metal shield, and a metal spring.

[0011] There is a capacitance effect C1 between the metal electrode and the high-voltage line, and there is also a certain stray capacitance C2 between the metal electrode and the ground. The two capacitors C1 and C2 are equivalent to being connected in series. According to the principle of voltage division by capacitance, if the high-voltage line is energized, the capacitor C2 formed between the metal electrode and the ground can obtain the voltage signal of the high-voltage line.

[0012] The circular metal shield is made of copper and covers all the circuit modules inside to prevent the electric field from concentrating and causing discharge that burns out the circuit modules.

[0013] A buzzer and LED are used to form an audible and visual alarm circuit to indicate that the high-voltage equipment is energized. When there is power, the audible and visual alarm circuit flashes continuously, and can reliably indicate the status at night and during the day.

[0014] The microprocessor module uses an STM32 chip;

[0015] One end of the metal spring is fixed to the circuit board and makes reliable electrical contact with the ground terminal of the power supply, while the other end is reliably electrically connected to the circular metal shield.

[0016] The step-down module uses a power conversion chip to convert 9VDC to 3.3VDC;

[0017] The switching circuit uses a push-button switch to control the 9V alkaline battery to power the main circuit microprocessor module;

[0018] The voltage acquisition circuit consists of 3V Zener diodes connected in reverse parallel, which convert AC signals into square wave signals to determine whether the high-voltage line is energized.

[0019] The microprocessor module is connected to a light-emitting diode and controls a buzzer via a transistor circuit. The buzzer is controlled by a switch circuit. The step-down module is controlled by a switch circuit and connected to the microprocessor module. The metal electrode is connected to a voltage follower, which is connected to a voltage acquisition circuit, which is then connected to the microprocessor module.

[0020] Preferably, the grounding clamp includes a bolt with a handle and a fixing bracket; the fixing bracket has a threaded hole, and the bolt with the handle is screwed onto the fixing bracket, which can adjust the distance between the other end of the bolt with the handle and the fixing bracket for tightening the grounding wire.

[0021] The beneficial effects of this utility model are:

[0022] 1) An invention based on the principle of electric field coupling and a high-voltage line voltage detection indicator circuit was invented to realize the detection of the live information of high-voltage equipment in a non-contact state.

[0023] 2) An invention based on the principle of current suppression and a portable special grounding wire that suppresses induced electric arc was invented, improving the safety of operation and maintenance personnel. Attached Figure Description

[0024] Figure 1 This is a structural diagram of the present invention;

[0025] Figure 2 This is a system block diagram of the voltage detection device. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention. Example

[0027] like Figure 1As shown, a grounding device with induced current detection and rapid arc extinguishing capabilities includes a high-voltage hook 1, an insulating rod 2, an inductor coil 3, a voltage detector 4, a grounding clamp 5, and a cable 6. The voltage detector 4 is mounted on the high-voltage hook 1 and is used to detect whether the high-voltage line is energized. One end of the inductor coil 3 is electrically connected to the high-voltage hook 1 via the metal housing of the voltage detector using the cable 6, and the other end is electrically connected to the grounding clamp 5 using the cable 6. The insulating rod 2 is connected to the high-voltage hook 1 and is used to lift the high-voltage hook 1 to attach it to the transmission line. The grounding clamp 5 is clamped onto the grounding wire during use to reliably ground the cable 6.

[0028] Preferably, the grounding clamp 5 includes a bolt 5-1 with a handle and a fixing bracket 5-2; the fixing bracket 5-2 has a threaded hole, and the bolt 5-1 with the handle is screwed onto the fixing bracket 5-2, so that the distance between the other end of the bolt 5-1 with the handle and the fixing bracket 5-2 can be adjusted to tighten the grounding wire.

[0029] Preferably, the high-voltage hook 1 is a bent hook made of metal material, which can be attached to the power transmission line.

[0030] Preferably, the insulating rod 2 is made of 3-6 link rods, and the insulation withstand voltage level can reach 220kV.

[0031] Preferably, the inductor coil 3 is an adjustable-turn suppressor current inductor coil. By controlling the taps of the inductor coil, the inductance value is changed, thereby achieving effective control of the high-voltage grounding lead current. There is no nonlinear harmonic interference during use.

[0032] Preferably, such as Figure 2 As shown, the voltage testing device 4 includes metal electrodes, a voltage follower, a voltage acquisition circuit, a 9V alkaline battery, a microprocessor module, a switching circuit, a transistor circuit, a buzzer, a light-emitting diode, a step-down module, a circular metal shield, and a metal spring.

[0033] There is a capacitance effect C1 between the metal electrode and the high-voltage line, and there is also a certain stray capacitance C2 between the metal electrode and the ground. The two capacitors C1 and C2 are equivalent to being connected in series. According to the principle of voltage division by capacitance, if the high-voltage line is energized, the capacitor C2 formed between the metal electrode and the ground can obtain the voltage signal of the high-voltage line.

[0034] The circular metal shield is made of copper and covers all the circuit modules inside to prevent the electric field from concentrating and causing discharge that burns out the circuit modules.

[0035] A buzzer and LED are used to form an audible and visual alarm circuit to indicate that the high-voltage equipment is energized. When there is power, the audible and visual alarm circuit flashes continuously, and can reliably indicate the status at night and during the day.

[0036] The microprocessor module uses an STM32 chip;

[0037] One end of the metal spring is fixed to the circuit board and makes reliable electrical contact with the ground terminal of the power supply, while the other end is reliably electrically connected to the circular metal shield.

[0038] The step-down module uses a power conversion chip to convert 9VDC to 3.3VDC;

[0039] The switching circuit uses a push-button switch to control the 9V alkaline battery to power the main circuit microprocessor module;

[0040] The voltage acquisition circuit consists of 3V Zener diodes connected in reverse parallel, which convert AC signals into square wave signals to determine whether the high-voltage line is energized.

[0041] The microprocessor module is connected to a light-emitting diode and controls a buzzer via a transistor circuit. The buzzer is controlled by a switch circuit. The step-down module is controlled by a switch circuit and connected to the microprocessor module. The metal electrode is connected to a voltage follower, which is connected to a voltage acquisition circuit, which is then connected to the microprocessor module.

[0042] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A grounding device with induced current detection and rapid arc extinguishing capabilities, characterized in that, The system includes a high-voltage hook, an insulating rod, an inductor coil, a voltage detector, a grounding clamp, and a cable. The voltage detector is mounted on the high-voltage hook and is used to sense whether the high-voltage line is energized. One end of the inductor coil is electrically connected to the high-voltage hook via a cable through the metal housing of the voltage detector, and the other end is electrically connected to the grounding clamp via a cable. The insulating rod is connected to the high-voltage hook and is used to lift the high-voltage hook and attach it to the transmission line. The grounding clamp is used to clamp onto the grounding wire to reliably ground the cable.

2. The grounding device with induced current detection and rapid arc extinguishing as described in claim 1, characterized in that, The high-voltage hook is a bent hook made of metal material, which can be attached to the power transmission line.

3. The grounding device with induced current detection and rapid arc extinguishing as described in claim 1, characterized in that, The insulating rod uses 3-6 link bars, and the insulation withstand voltage level can reach 220kV.

4. The grounding device with induced current detection and rapid arc extinguishing as described in claim 1, characterized in that, The inductor coil is an adjustable-turn current-suppressing inductor coil. By controlling the taps of the inductor coil, the inductance value is changed, thereby achieving effective control of the current of the high-voltage grounding lead. There is no nonlinear harmonic interference during use.

5. The grounding device with induced current detection and rapid arc extinguishing as described in claim 1, characterized in that, The voltage testing device includes metal electrodes, a voltage follower, a voltage acquisition circuit, a 9V alkaline battery, a microprocessor module, a switching circuit, a transistor circuit, a buzzer, a light-emitting diode, a step-down module, a circular metal shield, and a metal spring. The circular metal shield is made of copper and covers all the circuit modules inside to prevent the electric field from concentrating and causing discharge that burns out the circuit modules. A buzzer and LED are used to form an audible and visual alarm circuit to indicate that the high-voltage equipment is energized. When there is power, the audible and visual alarm circuit flashes continuously, and can reliably indicate the status at night and during the day. The microprocessor module uses an STM32 chip; One end of the metal spring is fixed to the circuit board and makes reliable electrical contact with the ground terminal of the power supply, while the other end is reliably electrically connected to the circular metal shield. The step-down module uses a power conversion chip to convert 9VDC to 3.3VDC; The switching circuit uses a push-button switch to control the 9V alkaline battery to power the main circuit microprocessor module; The voltage acquisition circuit consists of 3V Zener diodes connected in reverse parallel, which convert AC signals into square wave signals to determine whether the high-voltage line is energized. The microprocessor module is connected to a light-emitting diode and controls a buzzer via a transistor circuit. The buzzer is controlled by a switch circuit. The step-down module is controlled by a switch circuit and connected to the microprocessor module. The metal spring is connected to a voltage follower, which is connected to a voltage acquisition circuit, which is then connected to the microprocessor module.

6. The grounding device with induced current detection and rapid arc extinguishing as described in claim 1, characterized in that, The grounding clamp includes a bolt with a handle and a fixing bracket; the fixing bracket has a threaded hole, and the bolt with the handle is screwed onto the fixing bracket, which can adjust the distance between the other end of the bolt with the handle and the fixing bracket to tighten the grounding wire.

Images