Grounding device with grounding status monitoring function and grounding monitoring method

Abstract

The present invention provides a grounding device and a grounding monitoring method with a grounding status monitoring function, which relate to the field of power monitoring technology. The grounding device includes a wire clamp, a wire clamp loosening detection mechanism and a grounding resistance detection mechanism. The wire clamp loosening detection mechanism is arranged on the wire clamp, and is used to determine the tightness of the wire clamp by ultrasonic signal acquisition; the grounding resistance detection mechanism is fixed on the pole tower, and the ground wire connected to the wire clamp passes through the coil induction component of the grounding resistance detection mechanism, which is used to determine the grounding resistance by collecting the induction signal by the coil, and then determine the grounding status during the operation according to the tightness of the wire clamp and the grounding resistance, and perform corresponding alarm prompts and data information upload. The device provided by this scheme is convenient for rapid installation and grounding monitoring on site, and this scheme can improve the operation efficiency, while reducing the safety threat to the operators caused by sudden electrification during the operation.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power monitoring, and in particular to a grounding device and a grounding monitoring method with a grounding state monitoring function. Background Art

[0002] Hanging a portable grounding wire is a safety barrier to protect maintenance personnel and is the lifeline of power workers. It can prevent adjacent high-voltage lines and equipment from generating induced voltage on power-off lines and equipment or cause harm to the human body due to sudden power outages. At the same time, it can discharge the residual charge of power-off lines and equipment to ensure the safety of maintenance workers.

[0003] At present, there are two main types of grounding wires used by maintenance workers, one is a portable grounding wire fixed by a hook-type leaf spring clamping method, and the other is an operating rod grounding wire fixed by a bolt tightening clamping method. However, in actual applications, both methods have the problem of poor contact of the wires due to insufficient pressure, which leads to loose contact between the overhead line wire and the grounding wire fixture, generating induced voltage when the overhead line is out of power, causing unnecessary danger, or failing to play a safety role when the power outage section line accidentally calls or mis-transmits power, causing casualties and damage to line equipment. Moreover, portable grounding wires are usually suspended on transmission lines several meters or even tens of meters above the ground. Due to the influence of wind and other factors, it is very easy for the grounding wire clamp to loosen or even fall off, causing the grounding wire to lose its protective function, thus posing a serious threat to the personal safety of the workers. Therefore, it is of great significance to monitor the grounding status of the grounding wire and issue an early warning at the first time to eliminate accidents in the bud, which is of great significance to ensure the safety of maintenance workers.

[0004] However, when monitoring the grounding status of the grounding wire, the operator usually installs the corresponding monitoring module on the grounding wire on site. The installation process is cumbersome, takes a lot of time and manpower, and seriously affects the work efficiency. In practice, there are often sudden power supply to the line or equipment, or induced voltage is generated by the line and equipment, which causes harm to the human body. Summary of the invention

[0005] In view of this, in order to address the above shortcomings, it is necessary to propose a grounding device and a grounding monitoring method with a grounding status monitoring function, so as to facilitate rapid installation and grounding monitoring on site, improve work efficiency, and reduce the safety threats posed by live working to operators.

[0006] In a first aspect, the present invention provides a grounding device with a grounding state monitoring function, comprising: a wire clamp, a wire clamp loosening detection mechanism, and a grounding resistance detection mechanism;

[0007] The wire clamp comprises an upper clamp assembly and a lower clamp assembly, wherein the upper clamp assembly and the lower clamp assembly form an arc-shaped clamping portion for clamping the cable, and the lower clamp assembly is provided with a grounding terminal for connecting the ground wire; the wire clamp loosening detection mechanism is communicatively connected with the grounding resistance detection mechanism, and comprises a first control module and an ultrasonic assembly, wherein the ultrasonic assembly is electrically connected with the first control module, and the first control module is arranged on the upper surface of the upper clamp assembly; the ultrasonic assembly comprises two groups of ultrasonic units, and the two groups of ultrasonic units are respectively arranged on both sides of the clamping portion; wherein each group of ultrasonic units comprises an ultrasonic transmitter and an ultrasonic receiver, wherein the ultrasonic transmitter is arranged at the position where the clamping portion is located in the lower clamp assembly, and the ultrasonic receiver is arranged at the position where the clamping portion is located in the upper clamp assembly, and the transmitting end of the ultrasonic transmitter and the receiving end of the ultrasonic receiver are directly opposite, and when the clamping portion clamps the cable, the cable can be blocked on the ultrasonic propagation path of the ultrasonic transmitter and the ultrasonic receiver; the first control module is used to determine the tightness of the wire clamp according to whether the ultrasonic receiver receives the ultrasonic signal, and send the tightness of the wire clamp to the grounding resistance detection mechanism;

[0008] The grounding resistance detection mechanism includes a fixed component, a coil induction component and a second control module; the coil induction component is fixedly connected to the fixed component, the fixed component is used to be fixedly connected to the pole tower, the middle of the coil induction component is a hollow structure, the ground wire connected to the grounding end of the wire clamp passes through the hollow structure of the coil induction component and is grounded, and the coil induction component is used to monitor the induction signal of the ground wire; the second control module is fixedly arranged on the coil induction component, and is used to determine the grounding resistance of the ground wire according to the induction signal collected by the coil induction component; and is used to send the determined grounding resistance and the received tightness state of the wire clamp to a server connected to it, so that the server side executes corresponding security policies and information records.

[0009] Preferably, the wire clamp loosening detection mechanism also includes a trigger rod and an angle detection component, a through hole is opened on the upper clamp component and the lower clamp component at a middle position of the clamping part, one end of the trigger rod is movably connected to the first control module, and the other end is provided with a card slot, which is used to be clamped on the edge of the through hole of the lower clamp component when the wire clamp is opened to maintain the open state of the wire clamp, and is used to be triggered to disengage from the edge of the through hole of the lower clamp component when the cable is clamped in the clamping part to close the wire clamp; the angle detection component is electrically connected to the first control module, and is arranged at the movable connection between the trigger rod and the first control module, and is used to detect the rotation angle of the trigger rod and send the detected angle information to the first control module; the first control module is used to control the start and stop of the ultrasonic component according to the uploaded angle information.

[0010] Preferably, the first control module is fixed to the upper surface of the upper clamp assembly through a U-shaped fixing piece, and the ultrasonic transmitter is fixed to the lower clamp assembly through a U-shaped fixing piece.

[0011] Preferably, a first power switch and a first charging interface are respectively provided on both sides of the first control module; the first power switch is used to control the start and stop of the wire clamp loosening detection mechanism, a rechargeable battery is provided inside the first control module, and the first charging interface is used to charge the rechargeable battery.

[0012] Preferably, one end of the second control module has a wedge-shaped structure extending out of the end surface of the coil induction component, and the fixing component is fixedly connected to the lower surface of the wedge-shaped structure by butterfly nuts and bolts.

[0013] Preferably, the fixing assembly comprises a connecting plate, a U-shaped groove, a fastener, a columnar protrusion and a movable plate; one end of the connecting plate is fixedly connected to the lower surface of the wedge-shaped structure, and the other end is fixedly connected to the outer surface of the bottom of the U-shaped groove, a threaded hole is provided on a U-shaped surface of the U-shaped groove, one end of the movable plate is slidably connected to the bottom of the U-shaped groove, and one side of the movable plate is opposite to the side of the U-shaped groove without the threaded hole, and the columnar protrusion is fixed on the other side of the movable plate, one end of the fastener is a hand-tightening end, and the other end is fixedly connected to the columnar protrusion after passing through the threaded hole, so that the movable plate can slide in the U-shaped groove by screwing the fastener, and the fixing assembly is fixed to the pole tower.

[0014] Preferably, a speaker is also provided at one end of the coil induction component without the wedge-shaped structure, and the speaker is electrically connected to the second control module; the second control module is used to perform an alarm operation through the speaker.

[0015] Preferably, the end of the coil induction component that is not provided with the wedge-shaped structure is also provided with a second power switch, a second charging interface and a communication module, the second power switch is used to control the start and stop of the ground resistance detection mechanism, the second charging interface is used to charge the rechargeable battery inside the second control module, and the communication module is used to communicate with the wire clamp loose detection mechanism and the server.

[0016] In a second aspect, the present invention further provides a grounding monitoring method, the implementation subject of the method is a grounding device with a grounding status monitoring function as described in the first aspect, and the method comprises the following steps:

[0017] Step 1: Connect the grounding terminal on the wire clip to the ground wire, and pass the ground wire through the coil induction component and then ground it;

[0018] Step 2: Turn on the wire clamp loosening detection mechanism and the ground resistance detection mechanism;

[0019] Step 3: Clamp the wire clamp onto the working cable;

[0020] Step 4: The first control module of the wire clamp looseness detection mechanism monitors in real time whether the ultrasonic receiver receives the ultrasonic signal. If the ultrasonic signal is received, it is determined that the current wire clamp is in a loose state, and the information that the wire clamp is in a loose state is sent to the ground resistance detection mechanism; while monitoring the tightness of the wire clamp, the second control module of the ground resistance detection mechanism obtains the induction signal collected by the coil induction component in real time, and determines the ground resistance of the ground wire according to the collected induction signal;

[0021] Step 5: When the second control module receives a signal indicating that the wire clamp is in a loose state, or determines that the grounding resistance of the ground wire exceeds a preset resistance threshold, an alarm operation is performed.

[0022] Preferably, after step 4, the method further includes: the second control module uploading the received wire clamp tightness status information and the determined ground wire resistance value information to the server in real time, so that the server records the information and executes the corresponding security policy.

[0023] It can be seen from the above technical scheme that in the grounding device and grounding monitoring method with grounding state monitoring function provided by the embodiment of the present invention, the device includes a wire clamp, a wire clamp loosening detection mechanism and a grounding resistance detection mechanism, wherein the wire clamp loosening detection mechanism is arranged on the upper clamping component of the wire clamp, and the wire clamp loosening detection mechanism also includes two groups of ultrasonic units, which are respectively arranged on both sides of the clamping part for clamping the cable, and the ultrasonic transmitter and the ultrasonic receiver in the ultrasonic unit are arranged so that when the clamping part clamps the cable, the cable is blocked in the ultrasonic propagation path of the ultrasonic generator and the ultrasonic receiver; when the wire clamp is clamped tightly, the cable blocks the propagation of the ultrasonic wave, so that it can be determined based on the signal received by the ultrasonic receiver whether the wire clamp is firmly clamped, that is, the grounding state of the current operation is determined; in addition, the device is also provided with a grounding resistance detection mechanism, which is fixed on the pole tower through a fixing component, and the ground wire connected to the wire clamp is grounded after passing through the coil induction component of the grounding resistance detection mechanism, so that the coil induction component determines the grounding resistance of the ground wire through the induced signal, thereby further determining the grounding state of the ground wire. It can be seen that the grounding device provided by this scheme only needs to clamp the wire clamp on the working cable, fix the grounding resistance detection mechanism on the pole tower, and ground the ground wire. It is not only convenient and quick to install, improving work efficiency, but also able to determine the grounding status through two sets of monitoring mechanisms, reducing the safety hazards of workers when working with power on. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of a grounding device with a grounding status monitoring function provided by an embodiment of the present invention.

[0025] Figure 2 A schematic diagram of a wire clamp and a wire clamp loosening detection mechanism from one perspective provided in an embodiment of the present invention.

[0026] Figure 3 A schematic diagram of a wire clamp and a wire clamp loosening detection mechanism from another perspective provided in an embodiment of the present invention.

[0027] Figure 4 A schematic diagram of an ultrasonic component provided in an embodiment of the present invention.

[0028] Figure 5 A schematic diagram of a ground resistance detection mechanism provided in an embodiment of the present invention.

[0029] Figure 6 A schematic diagram of a fixing assembly provided in an embodiment of the present invention.

[0030] Figure 7 A schematic diagram of an end surface of a coil induction component provided in an embodiment of the present invention.

[0031] In the figure: a wire clamp 10, an upper clamp assembly 11, a lower clamp assembly 12, a grounding terminal 13, a clamping portion 14, a wire clamp loosening detection mechanism 20, a first control module 21, an ultrasonic assembly 22, an ultrasonic unit 221, an ultrasonic transmitter 2211, an ultrasonic receiver 2212, a trigger rod 23, a card slot 24, a first power switch 25, a first charging interface 26, a grounding resistance detection mechanism 30, a fixing assembly 31, a connecting plate 311, a U-shaped groove 312, a fastener 313, a columnar protrusion 314, a movable plate 315, a coil induction assembly 32, a speaker 321, a second power switch 322, a second charging interface 323, a communication module 324, a second control module 33, a wedge-shaped structure 331, a grounding wire 40, and a cable 50. DETAILED DESCRIPTION

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] See also Figure 1-7 , an embodiment of the present invention provides a grounding device with a grounding state monitoring function, including: a wire clamp 10, a wire clamp loosening detection mechanism 20 and a grounding resistance detection mechanism 30;

[0034] The wire clamp 10 includes an upper clamp component 11 and a lower clamp component 12, wherein the upper clamp component 11 and the lower clamp component 12 form an arc-shaped clamping portion 14 for clamping the cable 50, and the lower clamp component 12 is provided with a grounding terminal 13 for connecting the ground wire 40; the wire clamp loosening detection mechanism 20 is communicatively connected with the ground resistance detection mechanism 30, and includes a first control module 21 and an ultrasonic component 22, wherein the ultrasonic component 22 is electrically connected to the first control module 21, and the first control module 21 is arranged on the upper surface of the upper clamp component 11; the ultrasonic component 22 includes two groups of ultrasonic units 221, and the two groups of ultrasonic units 221 are respectively arranged on both sides of the clamping portion 14; wherein each group of ultrasonic units 221 includes an ultrasonic generator; The ultrasonic transmitter 2211 and the ultrasonic receiver 2212 are provided, the ultrasonic transmitter 2211 is provided at the position where the clamping part 14 is located in the lower clamping assembly 12, and the ultrasonic receiver 2212 is provided at the position where the clamping part 14 is located in the upper clamping assembly 11, the transmitting end of the ultrasonic transmitter 2211 and the receiving end of the ultrasonic receiver 2212 are directly opposite, and when the clamping part 14 clamps the cable 50, the cable 50 can be blocked on the ultrasonic propagation path of the ultrasonic transmitter 2211 and the ultrasonic receiver 2212; the first control module 21 is used to determine the tightness of the wire clamp 10 according to whether the ultrasonic receiver 2212 receives the ultrasonic signal, and send the tightness of the wire clamp 10 to the ground resistance detection mechanism 30;

[0035] The grounding resistance detection mechanism 30 includes a fixed component 31, a coil induction component 32 and a second control module 33; the coil induction component 32 is fixedly connected to the fixed component 31, the fixed component 31 is used to be fixedly connected to the pole tower, the middle of the coil induction component 32 is a hollow structure, the ground wire 40 connected to the grounding end 13 of the wire clamp 10 passes through the hollow structure of the coil induction component 32 and is grounded, and the coil induction component 32 is used to monitor the induction signal of the ground wire 40; the second control module 33 is fixedly set on the coil induction component 32, and is used to determine the grounding resistance of the ground wire 40 according to the induction signal collected by the coil induction component 32; and, is used to send the determined grounding resistance and the received tightness state of the wire clamp 10 to a server connected to it so that the server side executes corresponding security policies and information records.

[0036] In this embodiment, the structure of the wire clamp 10 is conventional technology, such as an upper clamp component 11, a lower clamp component 12 and a spring, and the upper clamp component 11 and the lower clamp component 12 are hinged, etc., which will not be described in detail here. It should be noted that the upper clamp component 11 and the lower clamp component 12 in the wire clamp 10 provided in this embodiment form an arc-shaped clamping portion 14, and two groups of ultrasonic units 221 are respectively arranged on both sides of the clamping portion 14, and the lower end is an ultrasonic transmitter 2211, and the upper end is an ultrasonic receiver 2212. In this way, when the clamping portion 14 clamps the cable 50, the propagation path of the ultrasonic wave is blocked, so that the receiver cannot smoothly receive the ultrasonic signal, or the received ultrasonic signal is significantly different from the ultrasonic signal received when the cable 50 is not clamped. If the ultrasonic receiver 2212 can accurately receive the ultrasonic signal, it means that the wire clamp 10 does not effectively clamp the cable 50. It can be seen that according to the situation of the ultrasonic receiver 2212 receiving the ultrasonic signal, it can be determined whether the wire clamp 10 is loose, and then determine whether the grounding state is good.

[0037] For the ultrasonic unit 221, it can use an outdoor waterproof ultrasonic sensor with an IP68 rating and a frequency of 59kHz. In addition, the processing circuit of the ultrasonic sensor signal considers using an instrument amplifier + a high-precision amplifier to form a bandpass filter + amplifier circuit. The high-precision amplifier and the ref end of the instrument amplifier work together to form a high-pass filter, and the instrument amplifier input end uses an RC filter to build a low-pass filter. The ultrasonic transmission signal processing circuit uses the differential 59kHz PWM waveform output by the single-chip microcomputer, which becomes a ±12V differential PWM square wave signal after passing through the MOS tube.

[0038] Furthermore, the wire clamp loosening detection mechanism 20 also includes a trigger rod 23 and an angle detection component. A through hole is opened in the middle position of the clamping part 14 on the upper clamping component 11 and the lower clamping component 12. One end of the trigger rod 23 is movably connected to the first control module 21, and the other end is provided with a card slot 24, which is used to be clamped on the edge of the through hole of the lower clamping component 12 when the wire clamp 10 is opened to maintain the open state of the wire clamp 10, and is used to be triggered to disengage from the edge of the through hole of the lower clamping component 12 when the cable 50 is clamped in the clamping part 14, so that the wire clamp 10 is closed; the angle detection component is electrically connected to the first control module 21, and is arranged at the movable connection between the trigger rod 23 and the first control module 21, for detecting the rotation angle of the trigger rod 23, and sending the detected angle information to the first control module 21; the first control module 21 is used to control the start and stop of the ultrasonic component 22 according to the uploaded angle information.

[0039] In this embodiment, a trigger rod 23 is considered to be provided, and a slot 24 is provided at the top of the trigger rod 23, and the other end is movably connected to the first control module 21. In actual operation, according to the requirements of safety regulations, it is not allowed to touch the ground wire 40 when hanging and removing, and it is necessary to stay away from the grounding position. Therefore, in this embodiment, it is considered to set a trigger rod 23, and before the wire clamp 10 clamps the cable 50, the slot 24 of the trigger rod 23 is supported on the edge of the through hole of the lower clamp assembly 12, so that the wire clamp 10 remains in an open state. When clamping the wire clamp 10 onto the cable 50, it is usually a long-distance operation. For example, for an overhead cable 50, a traction rope is usually used to swing the wire clamp 10 onto the cable 50. In this way, when the wire clamp 10 is thrown onto the cable 50, the cable 50 touches the trigger rod 23, causing the trigger rod 23 to disengage from the edge of the through hole of the lower clamp assembly 12, so that the wire clamp 10 is closed and clamped on the cable 50. It can be seen that by providing the trigger rod 23 in this embodiment, the operator can perform long-distance operations to the greatest extent, thereby greatly improving the safety of the operator.

[0040] Moreover, in this embodiment, an angle detection component is also provided, which is provided at the movable connection between the trigger rod 23 and the first control module 21, and can detect the rotation angle of the trigger rod 23, and send the detected angle information to the first control module 21. When the trigger rod 23 is triggered to disengage from the edge of the through hole of the lower clamping component 12, the angle of the trigger rod 23 changes. At this time, by sending the angle information to the first control module 21, the first control module 21 can determine whether the current clamping operation of the wire clamp 10 is completed. When the angle information changes, the first control module 21 can start the ultrasonic component 22 to monitor the loose state of the wire clamp 10. In this way, the situation that the ultrasonic component 22 will work as long as the wire clamp loosening detection mechanism 20 is turned on, and the turning-on operation usually requires manual operation, which also avoids the harm of ultrasonic waves to the operator, and can reduce the energy consumption of the ultrasonic component 22, while extending the service life of the ultrasonic component 22.

[0041] In one embodiment, the first control module 21 is fixed to the upper surface of the upper clamp assembly 11 through a U-shaped fixing member, and the ultrasonic transmitter 2211 is fixed to the lower clamp assembly 12 through a U-shaped fixing member. In this embodiment, the U-shaped fixing member can be a U-shaped bolt, which can be used with a butterfly nut to fix the ultrasonic transmitter 2211 to the lower clamp assembly 12 and the first control module 21 to the upper clamp assembly 11, and the butterfly nut can be installed by hand tightening, which is more convenient and quick.

[0042] In one embodiment, a first power switch 25 and a first charging interface 26 are respectively provided on both sides of the first control module 21; the first power switch 25 is used to control the start and stop of the wire clamp loosening detection mechanism 20, a rechargeable battery is provided inside the first control module 21, and the first charging interface 26 is used to charge the rechargeable battery. In this embodiment, the first control module 21 can be set as a T-shaped structure, the first power switch 25 and the first charging interface 26 are respectively provided at both ends of the transverse side of the T-shaped structure, and the tail end of the longitudinal side is used to be fixed to the upper clamp assembly 11 through a U-shaped fixing piece.

[0043] Of course, in one embodiment, a buzzer electrically connected to the first control module 21 may also be provided. When the first control module 21 determines that the wire clamp 10 is loose according to the ultrasonic signal, the buzzer is used to give an alarm.

[0044] For the first control module 21, it is considered that it uses STM32F103C8T6 as the main control chip. Through the interrupt method, it senses whether the ultrasonic sensor has a reverse beam phenomenon; through the serial port and IO port, the wireless module is controlled, initialized and communicated; FLASH is used to judge and store the wireless module group number and ID number and whether it is powered on for the first time; the IO port is used to drive and switch the buzzer alarm; through the ADC function, the battery voltage is collected and sent to the ground resistance test mechanism through the wireless module; through the PWM output, an ultrasonic emission signal source is generated.

[0045] Specifically, when the wire clamp loosening detection mechanism 20 is working, after power-on, the 59kHz differential PWM waveform generated by the single-chip microcomputer passes through the MOS tube and becomes a ±12V differential PWM square wave signal, which is sent to the ultrasonic transmitter. After the ultrasonic receiving end collects the signal from the transmitting end, it is sent to the filter circuit, the amplifier circuit, and the comparator circuit in sequence, and then enters the external interrupt port of the single-chip microcomputer. The single-chip microcomputer determines whether there is an ultrasonic signal. If there is an ultrasonic signal, the IO port is controlled to turn on the audio alarm switch to let the alarm sound. After the 12V power supply passes through the voltage divider circuit, it enters the ADC of the single-chip microcomputer, and the single-chip microcomputer collects the battery voltage in real time. Through the serial port and 2 IO ports, it receives the polling command sent by the wireless module and sends its own related information to the wireless module.

[0046] In addition, the grounding device provided by the present invention also includes a grounding resistance detection mechanism 30, which is fixed on the pole tower through a fixing component 31, and the coil induction component 32 is a hollow cylindrical structure composed of a coil. The ground wire 40 connected to the grounding end 13 of the wire clamp 10 passes through the hollow structure in the middle of the coil induction component 32 and is grounded, so that the coil calculates the resistance of the ground wire 40 through the induction signal, and then determines the grounding state. The specific induction principle is: the coil induction component 32 includes two coils, one for sending signals and one for receiving signals. The coil that sends the signal sends a signal of a special frequency to the ground wire 40. If the power line is already grounded, the ground wire 40 will form a loop with the power line and the earth, and the resistance value is extremely small. After the receiving coil senses the current of the ground wire 40, the average resistance value of the loop is calculated, and then the grounding resistance value of the ground wire 40 is obtained. If the value becomes larger or greater than the measurement range, it is considered that the loop is broken or the contact is poor, and the wire clamp 10 does not effectively and reliably ground the power line. It can be seen that this solution can further determine the grounding state by monitoring the grounding resistance of the ground wire 40, thereby further ensuring the personal safety of the operating personnel.

[0047] In one embodiment, one end of the second control module 33 has a wedge-shaped structure 331 extending out of the end surface of the coil induction component 32 , and the fixing component 31 is fixedly connected to the lower surface of the wedge-shaped structure 331 by butterfly nuts and bolts. The fixing assembly 31 includes a connecting plate 311, a U-shaped groove 312, a fastener 313, a columnar protrusion 314 and a movable plate 315; one end of the connecting plate 311 is fixedly connected to the lower surface of the wedge-shaped structure 331, and the other end is fixedly connected to the outer surface of the bottom of the U-shaped groove 312, a threaded hole is provided on a U-shaped surface of the U-shaped groove 312, one end of the movable plate 315 is slidably connected to the bottom of the U-shaped groove 312, and one side of the movable plate 315 is opposite to the side of the U-shaped groove 312 without a threaded hole, and a columnar protrusion 314 is fixed on the other side of the movable plate 315, one end of the fastener 313 is a hand-tightening end, and the other end is fixedly connected to the columnar protrusion 314 after passing through the threaded hole, so that the movable plate 315 can slide in the U-shaped groove 312 by screwing the fastener 313, and the fixing assembly 31 is fixed on the pole tower.

[0048] In this embodiment, the fixing assembly 31 is fixedly connected to the wedge-shaped structure 331 of the second control module 33 by butterfly nuts and bolts. The operator can complete the installation by hand-tightening during installation, which is convenient and quick. Moreover, the fixing assembly 31 is mainly composed of a connecting plate 311, a U-shaped groove 312, a fastener 313, a columnar protrusion 314 and a movable plate 315. The movable plate 315 is movably arranged inside the U-shaped groove 312 and can slide in the U-shaped groove 312. By screwing the fastener 313, the movable plate 315 can be driven to slide, so that the pole tower is clamped between the movable plate 315 and an inner wall of the U-shaped groove 312, and the clamping tightness can be adjusted by adjusting the tightness of the screwing. The fastener 313 can be set as a T-shaped bolt, so that the installation can be completed by hand-tightening, thereby improving the work efficiency.

[0049] In one embodiment, a speaker 321 is also provided at one end of the coil induction component 32 without the wedge-shaped structure 331, and the speaker 321 is electrically connected to the second control module 33; the second control module 33 is used to perform an alarm operation through the speaker 321. In this way, when the second control module 33 receives a signal that the wire clamp 10 is in a loose state, or determines that the grounding resistance of the ground wire 40 exceeds a preset resistance threshold, an alarm prompt can be performed through the speaker 321. In addition, since the grounding resistance detection mechanism 30 is fixed on the pole tower, it is closer to the operator, so that the operator can hear the alarm prompt more clearly.

[0050] In one embodiment, the end of the coil induction component 32 that is not provided with the wedge-shaped structure 331 is also provided with a second power switch 322, a second charging interface 323 and a communication module 324. The second power switch 322 is used to control the start and stop of the ground resistance detection mechanism 30, the second charging interface 323 is used to charge the rechargeable battery inside the second control module 33, and the communication module 324 is used to communicate with the wire clamp loosening detection mechanism 20 and the server. In this embodiment, a high-performance rechargeable lithium battery is used, and the shell reserves a waterproof charging port and a waterproof power switch. The communication module 324 uses the A39C series 433M patch wireless module and the Internet of Things 4G module to upload data to the cloud server for early warning. The coil induction component 32 and the second control module 33 use the 485 communication scheme to communicate, and the single-chip microcomputer uses STM32F103C8T6. The audio alarm part uses a special 12V powered alarm speaker 321, which is switched by a MOS tube, and the MOS tube part uses AO3401A.

[0051] In addition, the present invention also provides a grounding monitoring method, the implementation subject of the method is a grounding device with a grounding status monitoring function as in the above embodiments, and the method comprises the following steps:

[0052] Step 1: The grounding terminal 13 on the wire clamp 10 is connected to the ground wire 40, and the ground wire 40 passes through the coil induction component 32 and is grounded;

[0053] Step 2: Turn on the wire clamp loosening detection mechanism 20 and the ground resistance detection mechanism 30;

[0054] Step 3: Clamp the wire clamp 10 onto the working cable 50;

[0055] Step 4: The first control module 21 of the wire clamp looseness detection mechanism 20 monitors in real time whether the ultrasonic receiver 2212 receives an ultrasonic signal. If an ultrasonic signal is received, it is determined that the current wire clamp 10 is in a loose state, and the information that the wire clamp 10 is in a loose state is sent to the ground resistance detection mechanism 30; while monitoring the tightness of the wire clamp 10, the second control module 33 of the ground resistance detection mechanism 30 obtains the induction signal collected by the coil induction component 32 in real time, and determines the ground resistance of the ground wire 40 according to the collected induction signal;

[0056] Step 5: When the second control module 33 receives a signal indicating that the wire clamp 10 is in a loose state, or determines that the grounding resistance of the ground wire 40 exceeds a preset resistance threshold, an alarm operation is performed.

[0057] In one embodiment, after step 4, the method further includes: the second control module 33 uploads the received tightness status information of the wire clamp 10 and the determined resistance value information of the ground wire 40 to the server in real time, so that the server records the information and executes the corresponding security policy.

[0058] It can be seen that this solution has high-precision monitoring capabilities, stable and reliable performance, easy installation and operation, remote monitoring and data recording, and provides a more comprehensive ground clamp monitoring and maintenance solution. By using this product, users can promptly detect the looseness of the ground clamp and abnormal changes in ground resistance, and then take corresponding measures to ensure the safe operation of power equipment and the safety of personnel.

[0059] The above method embodiment and device embodiment are based on the same inventive concept. For the corresponding description of the method embodiment, please refer to the relevant description of the device embodiment, which will not be repeated here.

[0060] The modules or units in the device of the embodiment of the present invention can be combined, divided and deleted according to actual needs. The above disclosure is only the preferred embodiment of the present invention, and of course it cannot be used to limit the scope of the rights of the present invention. Those skilled in the art can understand that all or part of the processes of the above embodiment are implemented, and the equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A grounding device with a grounding status monitoring function, characterized in that: include: Wire clamp, wire clamp looseness detection mechanism and ground resistance detection mechanism; The wire clamp comprises an upper clamp assembly and a lower clamp assembly, wherein the upper clamp assembly and the lower clamp assembly form an arc-shaped clamping portion for clamping the cable, and the lower clamp assembly is provided with a grounding terminal for connecting the ground wire; the wire clamp loosening detection mechanism is communicatively connected with the grounding resistance detection mechanism, and comprises a first control module and an ultrasonic assembly, wherein the ultrasonic assembly is electrically connected with the first control module, and the first control module is arranged on the upper surface of the upper clamp assembly; the ultrasonic assembly comprises two groups of ultrasonic units, and the two groups of ultrasonic units are respectively arranged on both sides of the clamping portion; wherein each group of ultrasonic units comprises an ultrasonic transmitter and an ultrasonic receiver, wherein the ultrasonic transmitter is arranged at the position where the clamping portion is located in the lower clamp assembly, and the ultrasonic receiver is arranged at the position where the clamping portion is located in the upper clamp assembly, and the transmitting end of the ultrasonic transmitter and the receiving end of the ultrasonic receiver are directly opposite, and when the clamping portion clamps the cable, the cable can be blocked on the ultrasonic propagation path of the ultrasonic transmitter and the ultrasonic receiver; the first control module is used to determine the tightness of the wire clamp according to whether the ultrasonic receiver receives the ultrasonic signal, and send the tightness of the wire clamp to the grounding resistance detection mechanism; The grounding resistance detection mechanism includes a fixed component, a coil induction component and a second control module; the coil induction component is fixedly connected to the fixed component, the fixed component is used to be fixedly connected to the pole tower, the middle of the coil induction component is a hollow structure, the ground wire connected to the grounding end of the wire clamp passes through the hollow structure of the coil induction component and is grounded, and the coil induction component is used to monitor the induction signal of the ground wire; the second control module is fixedly arranged on the coil induction component, and is used to determine the grounding resistance of the ground wire according to the induction signal collected by the coil induction component; And, used for sending the determined grounding resistance and the received tightness state of the wire clamp to a server connected to the communication therewith, so that the server side executes corresponding security policies and records information; The wire clamp loosening detection mechanism also includes a trigger rod and an angle detection component. A through hole is opened on the upper clamp component and the lower clamp component at the middle position of the clamping part. One end of the trigger rod is movably connected to the first control module, and the other end is provided with a card slot, which is used to be clamped on the edge of the through hole of the lower clamp component when the wire clamp is opened to maintain the open state of the wire clamp, and is used to be triggered to disengage from the edge of the through hole of the lower clamp component when the cable is clamped in the clamping part to close the wire clamp; the angle detection component is electrically connected to the first control module, and is arranged at the movable connection between the trigger rod and the first control module, and is used to detect the rotation angle of the trigger rod and send the detected angle information to the first control module; the first control module is used to control the start and stop of the ultrasonic component according to the uploaded angle information.

2. The grounding device with grounding status monitoring function according to claim 1, characterized in that: The first control module is fixed to the upper surface of the upper clamping assembly through a U-shaped fixing piece, and the ultrasonic transmitter is fixed to the lower clamping assembly through a U-shaped fixing piece.

3. The grounding device with grounding status monitoring function according to claim 1, characterized in that: A first power switch and a first charging interface are respectively provided on both sides of the first control module; the first power switch is used to control the start and stop of the wire clamp loosening detection mechanism, a rechargeable battery is provided inside the first control module, and the first charging interface is used to charge the rechargeable battery.

4. The grounding device with grounding status monitoring function according to claim 1, characterized in that: One end of the second control module has a wedge-shaped structure extending out of the end surface of the coil induction component, and the fixing component is fixedly connected to the lower surface of the wedge-shaped structure by butterfly nuts and bolts.

5. The grounding device with grounding status monitoring function according to claim 4, characterized in that: The fixing assembly comprises a connecting plate, a U-shaped groove, a fastener, a columnar protrusion and a movable plate; one end of the connecting plate is fixedly connected to the lower surface of the wedge-shaped structure, and the other end is fixedly connected to the outer surface of the bottom of the U-shaped groove, a threaded hole is provided on a U-shaped surface of the U-shaped groove, one end of the movable plate is slidably connected to the bottom of the U-shaped groove, and one side of the movable plate is opposite to the side of the U-shaped groove without a threaded hole, and the columnar protrusion is fixed on the other side of the movable plate, one end of the fastener is a hand-tightening end, and the other end is fixedly connected to the columnar protrusion after passing through the threaded hole, so that the movable plate can slide in the U-shaped groove by screwing the fastener, and the fixing assembly is fixed to the pole tower.

6. The grounding device with grounding status monitoring function according to claim 4, characterized in that: A speaker is also provided at one end of the coil induction component without the wedge-shaped structure, and the speaker is electrically connected to the second control module; the second control module is used to perform an alarm operation through the speaker.

7. The grounding device with grounding status monitoring function according to claim 4, characterized in that: A second power switch, a second charging interface and a communication module are also provided on the end of the coil induction component that is not provided with a wedge-shaped structure. The second power switch is used to control the start and stop of the ground resistance detection mechanism. The second charging interface is used to charge the rechargeable battery inside the second control module. The communication module is used to communicate with the wire clamp loosening detection mechanism and the server.

8. A grounding monitoring method, characterized in that: The implementation subject of the method is a grounding device with a grounding status monitoring function as described in claims 1-7, and the method comprises the following steps: Step 1: Connect the grounding terminal on the wire clip to the ground wire, and pass the ground wire through the coil induction component and then ground it; Step 2: Turn on the wire clamp loosening detection mechanism and the ground resistance detection mechanism; Step 3: Clamp the wire clamp onto the working cable; Step 4: The first control module of the wire clamp loosening detection mechanism monitors in real time whether the ultrasonic receiver receives an ultrasonic signal. If an ultrasonic signal is received, it is determined that the current wire clamp is in a loose state, and the information that the wire clamp is in a loose state is sent to the ground resistance detection mechanism; While monitoring the tightness of the wire clamp, the second control module of the ground resistance detection mechanism acquires the induction signal collected by the coil induction component in real time, and determines the ground resistance of the ground wire according to the collected induction signal; Step 5: When the second control module receives a signal indicating that the wire clamp is in a loose state, or determines that the grounding resistance of the ground wire exceeds a preset resistance threshold, an alarm operation is performed.

9. The grounding monitoring method according to claim 8, characterized in that: After step 4, the method further includes: the second control module uploading the received wire clamp tightness status information and the determined ground wire resistance value information to the server in real time, so that the server records the information and executes the corresponding security policy.

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