Grounding clamp with loosening monitoring function

Abstract

The utility model provides a grounding clamp with a loosening monitoring function, an upper clamping plate and a lower clamping plate form an arc-shaped clamping part used for clamping a cable, and the lower clamping plate is provided with a grounding end used for being connected with a ground wire; the grounding clamp further comprises an ultrasonic assembly, a loudspeaker and a control module, an ultrasonic transmitter of the ultrasonic assembly is arranged on the lower clamping plate, an ultrasonic receiver of the ultrasonic assembly is arranged on the upper clamping plate, and the transmitting end of the ultrasonic transmitter and the receiving end of the ultrasonic receiver directly face each other. The cable can be blocked on an ultrasonic propagation path of the ultrasonic transmitter and the ultrasonic receiver; the control module is arranged on the upper clamping plate, the loudspeaker is arranged on the control module, and the control module is electrically connected with the loudspeaker and the ultrasonic assembly and used for monitoring whether the ultrasonic receiver receives the ultrasonic signal or not in real time and giving an alarm through the loudspeaker when the ultrasonic signal is received. According to the scheme, the loosening state of the grounding clamp can be monitored in real time, and the personal safety during electric power operation is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power monitoring, in particular to a grounding clamp with a looseness 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, the grounding wire method used by maintenance workers is mainly the grounding clamp. The grounding clamp is a mechanical structure used to extract the current and charge on an object. It is usually connected to a grounding pile or a grounding grid. The clamping part is strongly clamped on the object so that the charge or current accumulated on the object can be taken away, eliminating potential hidden dangers. However, in actual applications, the grounding clamp still has the problem of poor contact with the wire, which leads to loose contact between the overhead line wire and the grounding wire clamp, which in turn causes safety accidents. 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 clamp to loosen or even fall off, causing the grounding wire to lose its protective function. It is difficult for operators in the operation and maintenance work state to detect the clamping state of the grounding clamp in time, and thus they cannot take corresponding countermeasures in time, which poses a serious threat to the personal safety of operators. Utility Model Content

[0004] In view of this, in order to address the above shortcomings, it is necessary to propose a grounding clamp with a looseness monitoring function to monitor the looseness state of the grounding clamp in real time and improve personal safety during power operations.

[0005] The utility model provides a grounding clamp with a looseness monitoring function, comprising an upper clamp and a lower clamp, the upper clamp and the lower clamp are hinged to each other and a spring is connected therebetween; the upper clamp and the lower clamp form an arc-shaped clamping portion for clamping a cable, and a grounding terminal is provided on the lower surface of the lower clamp for connecting a ground wire; the grounding clamp also includes an ultrasonic component, a speaker and a control module, the ultrasonic component includes an ultrasonic transmitter and an ultrasonic receiver, the ultrasonic transmitter is arranged on the lower clamp and is located at the position where the clamp is located, the ultrasonic receiver is arranged on the upper clamp and is located at the position where the clamp is located, the transmitting end of the ultrasonic transmitter and the receiving end of the ultrasonic receiver are directly opposite, and when the clamp clamps the cable, the cable can be blocked on the ultrasonic propagation path of the ultrasonic transmitter and the ultrasonic receiver; the control module is arranged on the upper surface of the upper clamp, the speaker is arranged on the control module, and the control module is electrically connected to the speaker and the ultrasonic component respectively, for real-time monitoring whether the ultrasonic receiver receives an ultrasonic signal, and when the ultrasonic signal is received, an alarm prompt is given through the speaker.

[0006] Preferably, the ultrasonic components include two, which are respectively arranged on both sides of the clamping portion.

[0007] Preferably, the control module is a flat T-shaped structure, the tail end of the longitudinal side of the T-shaped structure is fixed to the upper surface of the upper clamping plate by U-shaped bolts and butterfly nuts, and two ultrasonic receivers are respectively arranged on the lower surface of the two ends of the transverse side of the T-shaped structure.

[0008] Preferably, an I-shaped connector is further provided on the lower surface of the lower clamping plate, the upper end of which is fixed to the lower surface of the lower clamping plate by U-shaped bolts and butterfly nuts, and two ultrasonic transmitters are respectively provided at the two bottom ends of the I-shaped structure.

[0009] Preferably, the grounding clamp also includes a trigger rod, and through holes are provided on the upper clamp plate and the lower clamp plate in the middle position of the clamping portion, one end of the trigger rod is movably connected to the control module, and the other end is provided with a slot, which is used to make the slot clamped on the edge of the through hole of the lower clamp plate when the grounding clamp is opened, so that the grounding clamp is maintained in an open state; when the trigger rod is separated from the edge of the through hole of the lower clamp plate, it passes through the through hole of the upper clamp plate, the clamping portion and the through hole of the lower clamp plate in sequence and then extends out, and is used to separate from the edge of the through hole of the lower clamp plate when the cable is clamped in the clamping portion, so as to close the grounding clamp.

[0010] Preferably, the grounding clamp also includes an angle detection component, which is arranged at the movable connection between the trigger rod and the control module, and is used to monitor the rotation angle of the trigger rod and upload the detected angle information to the control module electrically connected thereto; the control module is used to control the start and stop of the ultrasonic component according to the angle information uploaded by the angle detection component.

[0011] Preferably, a rechargeable battery is disposed inside the control module, and a charging interface is disposed on the outer surface thereof for supplying power to the rechargeable battery.

[0012] Preferably, the tails of the upper clamping plate and the lower clamping plate are also provided with fixing holes for fixing and connecting the traction rope.

[0013] It can be seen from the above technical scheme that the grounding clamp with looseness monitoring function provided by the embodiment of the utility model includes an upper clamp, a lower clamp, an ultrasonic component, a speaker and a control module, the upper clamp and the lower clamp are hinged to each other, and a clamping part for clamping the cable is formed, and the ultrasonic component includes an ultrasonic transmitter and an ultrasonic receiver, wherein the ultrasonic transmitter is arranged on the lower clamp, and the ultrasonic receiver is arranged on the upper clamp, and the position of the arrangement can block the cable in the ultrasonic propagation path of the ultrasonic transmitter and the ultrasonic receiver when the clamping part clamps the cable; in this way, when the grounding clamp is clamped well, the ultrasonic receiver will not receive the ultrasonic signal, and when the grounding clamp is not clamped well, the ultrasonic receiver will receive the ultrasonic signal, and at this time the control module can give an alarm prompt through the speaker to prompt the operator that there is a problem with the grounding state of the grounding clamp, so as to take corresponding safety measures. It can be seen that the grounding clamp provided by this scheme can monitor the loose state of the grounding clamp in real time, thereby improving personal safety during power operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A front view of a grounding clamp with looseness monitoring function provided in an embodiment of the utility model.

[0015] Figure 2 A back view of a grounding clamp with looseness monitoring function provided in an embodiment of the utility model.

[0016] Figure 3 A bottom view of a grounding clamp with a looseness monitoring function provided in an embodiment of the utility model.

[0017] Figure 4 A view from another angle of the back side of a grounding clamp with a looseness monitoring function provided by an embodiment of the utility model.

[0018] In the figure: an upper clamping plate 1, a lower clamping plate 2, a clamping portion 3, a grounding terminal 4, an ultrasonic component 5, an ultrasonic transmitter 501, an ultrasonic receiver 502, a speaker 6, a control module 7, an X-shaped connector 8, a trigger rod 9, a card slot 10, a fixing hole 11, a cylindrical wheel 12, and a charging interface 13. DETAILED DESCRIPTION

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] See also Figure 1-4 The embodiment of the utility model provides a grounding clamp with a looseness monitoring function, including an upper clamping plate 1 and a lower clamping plate 2, the upper clamping plate 1 and the lower clamping plate 2 are hinged to each other and connected with a spring; the upper clamping plate 1 and the lower clamping plate 2 form an arc-shaped clamping portion 3 for clamping the cable, and the lower surface of the lower clamping plate 2 is provided with a grounding terminal 4 for connecting the ground wire; the grounding clamp also includes an ultrasonic component 5, a speaker 6 and a control module 7, the ultrasonic component 5 includes an ultrasonic transmitter 501 and an ultrasonic receiver 502, the ultrasonic transmitter 501 is arranged on the lower clamping plate 2 and is located at the position where the clamping portion 3 is located, and the ultrasonic receiver 502 is connected to the ground wire. 02 is arranged on the upper clamping plate 1 and is located at the position where the clamping part 3 is located. The transmitting end of the ultrasonic transmitter 501 and the receiving end of the ultrasonic receiver 502 are opposite to each other, and when the clamping part 3 clamps the cable, the cable can be blocked in the ultrasonic propagation path of the ultrasonic transmitter 501 and the ultrasonic receiver 502; the control module 7 is arranged on the upper surface of the upper clamping plate 1, and the speaker 6 is arranged on the control module 7, and the control module 7 is electrically connected to the speaker 6 and the ultrasonic component 5 respectively, for real-time monitoring of whether the ultrasonic receiver 502 receives the ultrasonic signal, and when the ultrasonic signal is received, an alarm is given through the speaker 6.

[0021] In this embodiment, the upper clamp 1, the lower clamp 2 and the spring constitute a conventional grounding clamp, which belongs to the prior art and will not be described here. It should be noted that the upper clamp 1 and the lower clamp 2 provided in this embodiment form an arc-shaped clamping portion 3, and the ultrasonic component 5 is arranged on the side of the clamping portion 3, and the lower end is an ultrasonic transmitter 501, and the upper end is an ultrasonic receiver 502. In this way, when the clamping portion 3 clamps the cable, the propagation path of the ultrasonic wave is blocked, so that the receiver cannot smoothly receive the ultrasonic signal. When the grounding clamp is loose and causes poor contact, the cable will deviate from the clamping portion 3, and the ultrasonic receiver 502 will receive the ultrasonic signal. At this time, the control module 7 will issue an alarm prompt through the speaker 6 to remind the operator that the grounding clamp is loose, the grounding is poor, etc., thereby improving the personal safety of the operator.

[0022] In one embodiment, in order to improve the monitoring accuracy, the ultrasonic components 5 may include two, and are respectively arranged on both sides of the clamping portion 3, that is, after the cable passes through the clamping portion 3, the cables on both sides are monitored by the ultrasonic components 5 on both sides respectively.

[0023] For the ultrasonic component 5, an outdoor waterproof ultrasonic sensor with IP68 grade and a frequency of 59kHz can be used. In addition, the processing circuit of the ultrasonic 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 input end of the instrument amplifier uses an RC filter to build a low-pass filter. The processing circuit of the ultrasonic transmission signal 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.

[0024] In one embodiment, the control module 7 is a flat T-shaped structure, the tail end of the longitudinal side of the T-shaped structure is fixed to the upper surface of the upper clamping plate 1 by U-shaped bolts and butterfly nuts, and two ultrasonic receivers 502 are respectively arranged on the lower surface of the two ends of the transverse side of the T-shaped structure.

[0025] In this embodiment, the control module 7 is fixed to the upper surface of the upper clamp 1 by U-bolts and butterfly nuts, and the butterfly nuts can be installed by hand-tightening, so the installation and use of the grounding clamp are more convenient and quick, which is conducive to improving the work efficiency of operators. In addition, the control module 7 is set as a T-shaped structure, which can make the structure of the entire device simpler and more compact. The control module 7 of the T-shaped structure can be fixed on the upper surface of the upper clamp 1, and the lower surfaces of the two ends of the lateral side of the T-shaped structure are just used to install the ultrasonic receiver 502.

[0026] In one embodiment, an I-shaped connector 8 is further provided on the lower surface of the lower clamp plate 2, and the upper end of the I-shaped connector 8 is fixed to the lower surface of the lower clamp plate 2 by U-shaped bolts and butterfly nuts, and two ultrasonic transmitters 501 are respectively provided at the two bottom ends of the I-shaped structure.

[0027] In order to fix the ultrasonic transmitter 501 on both sides of the clamping part 3, the present embodiment considers setting an "X"-shaped connector 8 on the lower surface of the lower clamping plate 2, and the upper end of the "X"-shaped connector 8 is fixed to the lower surface of the lower clamping plate 2 by U-shaped bolts and butterfly nuts, so that the installation and use of the connector are more convenient and quick, and the installation can be achieved by hand-tightening. The two bottom ends of the "X"-shaped structure are used to install the ultrasonic transmitter 501, and such a setting makes the structure of the device simpler and more compact.

[0028] In one embodiment, the grounding clamp may further include a trigger rod 9, a through hole is provided on the upper clamp plate 1 and the lower clamp plate 2 at a middle position of the clamping portion 3, one end of the trigger rod 9 is movably connected to the control module 7, and the other end is provided with a slot 10, which is used to make the slot 10 stuck on the edge of the through hole of the lower clamp plate 2 when the grounding clamp is opened, so that the grounding clamp is maintained in an open state; when the trigger rod 9 is separated from the edge of the through hole of the lower clamp plate 2, it passes through the through hole of the upper clamp plate 1, the clamping portion 3 and the through hole of the lower clamp plate 2 in sequence and then extends out, and is used to separate from the edge of the through hole of the lower clamp plate 2 when the cable is clamped in the clamping portion 3, so that the grounding wire clamp is closed.

[0029] In this embodiment, a trigger rod 9 is considered to be provided, and a slot 10 is provided at the top of the trigger rod 9, and the other end is movably connected to the control module 7. In actual operation, according to the requirements of safety regulations, it is not allowed to touch the grounding wire during hanging and dismantling, and it is necessary to stay away from the grounding position. Therefore, in this embodiment, a trigger rod 9 is considered to be provided. Before the grounding clamp clamps the cable, the slot 10 of the trigger rod 9 is supported on the edge of the through hole of the lower clamp 2, so that the grounding clamp remains in an open state. When the grounding clamp is clamped to the cable, it is usually a long-distance operation. For example, for overhead cables, the grounding clamp is usually thrown onto the cable using a traction rope. When the grounding clamp is thrown onto the cable, the cable touches the trigger rod 9, so that the trigger rod 9 is separated from the edge of the through hole of the lower clamp 2, so that the grounding clamp is closed and clamped on the cable. It can be seen that by providing the trigger rod 9 in this embodiment, the operator can work remotely to the greatest extent, thereby ensuring the safety of the operator to a greater extent.

[0030] In order to fix the traction rope, the present embodiment also considers setting a fixing hole 11 at the tail of the upper clamp plate 1 and the lower clamp plate 2. One end of the traction rope can be fixed on the fixing hole 11 of the lower clamp plate 2, and the other end is pulled by the operator after passing through the fixing hole 11 of the upper clamp plate 1. In this way, when the operator clamps the cable, the traction rope can be used to swing the grounding clamp onto the cable for clamping. When removing the grounding clamp, the operator pulls the traction rope upward, and the traction rope causes the tail of the upper clamp plate 1 and the lower clamp plate 2 to generate a certain opposing force, so that the clamping part 3 is loosened, and the upward traction force generated at the same time will cause the grounding clamp to detach from the cable, thereby realizing the removal of the grounding clamp.

[0031] In order to avoid excessive friction between the fixing hole 11 and the traction rope when disassembling the grounding clamp, which leads to traction difficulties, and also to avoid the edge of the fixing hole 11 from wearing the traction rope, in one embodiment, it is considered to set a rotatable cylindrical wheel 12 on one side of the fixing hole 11 of the upper clamp 1 near the tail end of the grounding clamp, so that when the grounding clamp is pulled upward, the traction rope sticks to the surface of the cylindrical wheel 12, which reduces the difficulty of traction and also reduces the wear on the traction rope.

[0032] In one embodiment, the grounding clamp also includes an angle detection component, which is arranged at the movable connection between the trigger rod 9 and the control module 7, and is used to monitor the rotation angle of the trigger rod 9 and upload the detected angle information to the control module 7 electrically connected thereto; the control module 7 is used to control the start and stop of the ultrasonic component 5 according to the angle information uploaded by the angle detection component.

[0033] In this embodiment, an angle detection component is provided at the movable connection between the trigger rod 9 and the control module 7, which can monitor the rotation angle of the trigger rod 9 and send the monitored angle information to the control module 7. When the trigger rod 9 is triggered to disengage from the edge of the through hole of the lower clamp 2, the angle of the trigger rod 9 changes. At this time, by sending the angle information to the control module 7, the control module 7 can determine whether the clamping operation of the current grounding clamp is completed. When the angle information reaches the preset angle threshold, it is considered that the clamping operation of the current grounding clamp is completed, and the control module 7 can start the ultrasonic component 5 to monitor the loose state of the grounding clamp. This avoids the situation that the ultrasonic component 5 will work as long as the control module 7 is started. The control module 7 needs to be manually started, and then the grounding clamp is clamped on the cable by the traction rope. This process often takes a lot of time. The solution based on the above angle detection can automatically start the ultrasonic component 5 according to the clamping situation of the cable, which not only avoids the harm of ultrasonic waves to the operator, but also reduces the energy consumption of the ultrasonic component 5 and prolongs the service life of the ultrasonic component 5.

[0034] It is easy to understand that, in one embodiment, a power switch may be provided on the control module 7 to start and stop the operation of the control module 7. At the same time, a charging interface 13 may also be provided on the control module 7, and a rechargeable battery may be provided inside the control module 7, so that the rechargeable battery can be charged through the charging interface 13.

[0035] Furthermore, for the control module 7, it is considered that it uses STM32F103C8T6 as the main control chip. Through the interruption method, it senses whether the ultrasonic sensor has a cross-reflection 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.

[0036] Specifically, when the ground clamp is working, after power-on, the 59kHz differential PWM waveform generated by the single-chip microcomputer is converted into a ±12V differential PWM square wave signal after passing through the MOS tube and sent to the ultrasonic transmitter. After the ultrasonic receiver collects the signal from the transmitter, 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.

[0037] The modules or units in the device of the embodiment of the utility model can be combined, divided and deleted according to actual needs. The above disclosure is only the preferred embodiment of the utility model, and of course it cannot be used to limit the scope of the rights of the utility model. Ordinary technicians in this field can understand that all or part of the processes of the above embodiments are implemented, and equivalent changes made according to the claims of the utility model still fall within the scope of the utility model.

Claims

1. A grounding clamp with looseness monitoring function, comprising an upper clamp and a lower clamp, the upper clamp and the lower clamp are hinged to each other and a spring is connected between them; characterized in that: The upper clamping plate and the lower clamping plate form an arc-shaped clamping part for clamping the cable, and the lower surface of the lower clamping plate is provided with a grounding terminal for connecting the ground wire; the grounding clamp also includes an ultrasonic component, a speaker and a control module, the ultrasonic component includes an ultrasonic transmitter and an ultrasonic receiver, the ultrasonic transmitter is arranged on the lower clamping plate and is located at the position where the clamping part is located, the ultrasonic receiver is arranged on the upper clamping plate and is located at the position where the clamping part is located, the transmitting end of the ultrasonic transmitter and the receiving end of the ultrasonic receiver are directly opposite, and when the clamping part clamps the cable, the cable can be blocked on the ultrasonic propagation path of the ultrasonic transmitter and the ultrasonic receiver; the control module is arranged on the upper surface of the upper clamping plate, the speaker is arranged on the control module, and the control module is electrically connected to the speaker and the ultrasonic component respectively, for real-time monitoring whether the ultrasonic receiver receives the ultrasonic signal, and when the ultrasonic signal is received, an alarm prompt is given through the speaker.

2. The grounding clamp with looseness monitoring function according to claim 1, characterized in that: The ultrasonic components include two components, which are respectively arranged on both sides of the clamping portion.

3. The grounding clamp with looseness monitoring function according to claim 2, characterized in that: The control module is a flat T-shaped structure, the tail end of the longitudinal side of the T-shaped structure is fixed to the upper surface of the upper clamping plate by U-shaped bolts and butterfly nuts, and two ultrasonic receivers are respectively arranged on the lower surface of the two ends of the transverse side of the T-shaped structure.

4. The grounding clamp with looseness monitoring function according to claim 2, characterized in that: The lower surface of the lower clamping plate is also provided with an I-shaped connecting piece, the upper end of which is fixed to the lower surface of the lower clamping plate by a U-shaped bolt and a butterfly nut, and two ultrasonic transmitters are respectively arranged at the two bottom ends of the I-shaped structure.

5. The grounding clamp with looseness monitoring function according to claim 1, characterized in that: The grounding clamp also includes a trigger rod, and through holes are provided on the upper clamp and the lower clamp at the middle position of the clamping part. One end of the trigger rod is movably connected to the control module, and the other end is provided with a slot, which is used to make the slot clamped on the edge of the through hole of the lower clamp when the grounding clamp is opened, so that the grounding clamp is maintained in an open state; when the trigger rod is separated from the edge of the through hole of the lower clamp, it passes through the through hole of the upper clamp, the clamping part and the through hole of the lower clamp in sequence and then extends out, and is used to separate from the edge of the through hole of the lower clamp when the cable is clamped in the clamping part, so as to close the grounding wire clamp.

6. The grounding clamp with looseness monitoring function according to claim 5, characterized in that: The grounding clamp also includes an angle detection component, which is arranged at the movable connection between the trigger rod and the control module, and is used to monitor the rotation angle of the trigger rod and upload the detected angle information to the control module electrically connected thereto; the control module is used to control the start and stop of the ultrasonic component according to the angle information uploaded by the angle detection component.

7. The grounding clamp with looseness monitoring function according to claim 1, characterized in that: The control module is provided with a rechargeable battery inside and a charging interface on the outer surface for supplying power to the rechargeable battery.

8. The grounding clamp with looseness monitoring function according to any one of claims 1 to 7, characterized in that: The tails of the upper clamping plate and the lower clamping plate are also provided with fixing holes for fixing and connecting the traction rope.

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