Backflow cable state monitoring and early warning device with annular monitoring sensor

Abstract

The utility model discloses a backflow cable state monitoring and early warning device with an annular monitoring sensor, which belongs to the field of high-voltage power cables, and comprises a monitoring sensor, a wear-resistant pad and a monitoring processing assembly, the monitoring sensor is provided with a through hole for a backflow cable to pass through, and the wear-resistant pad is connected to the inner wall of the through hole and connected with the monitoring processing assembly. The wear-resistant pad is used for abutting against the backflow cable to limit the monitoring sensor to move on the backflow cable, the monitoring processing assembly comprises a controller, a collector and an alarm, the collector is used for collecting detection information of the monitoring sensor, and the controller is configured to control the alarm to give an alarm based on the detection information obtained by the collector. The annular monitoring sensor is directly arranged on the backflow cable in a sleeving mode, the wear-resisting pad is arranged on the inner wall of the through hole, the annular monitoring sensor can be conveniently limited to the fixed position of the backflow cable, the monitoring sensor is prevented from sliding on the backflow cable, installation is convenient, the monitoring sensor is not prone to being taken down after being installed, the anti-theft performance is improved, and the risk that the backflow cable is stolen can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage power cable technology, and in particular to a return cable status monitoring and early warning device with a ring monitoring sensor. Background Technology

[0002] High-voltage power cables of 35kV and above often use segmented grounding for their metal sheaths. For segmented grounding, the return cable provides an important path for ground fault current and is an important component for protecting the line operation. Since the return cable is not energized under normal circumstances and does not affect the line operation, it has become a target for theft. After the return cable is stolen, the line impact can easily cause the sheath voltage to rise to thousands or even tens of thousands of volts, causing insulation damage, protector breakdown, sheath grounding and other problems, which greatly troubles the operation and maintenance work of the staff.

[0003] Patent application number 201820998107.3 discloses a return cable anti-theft device with good anti-theft effect, including anti-theft screws and anti-theft clamps for fixing the return cable. Multiple anti-theft screws and clamps are provided and spaced apart. The device also includes a vibration sensor, a data acquisition unit, and an alarm connected to the anti-theft screws and clamps. The vibration sensor collects vibration signals from the return cable and / or the anti-theft screws and / or clamps. The vibration sensor is located at the interface between the anti-theft screw or clamp and the return cable. The data acquisition unit acquires the vibration signals collected by the vibration sensor and transmits them to the alarm. The alarm includes an acquisition unit and a processing unit. The acquisition unit acquires the vibration signals transmitted by the data acquisition unit, and the processing unit determines whether the return cable has been stolen based on the vibration signals acquired by the acquisition unit and triggers an alarm based on the determination result. This method requires the use of anti-theft screws and clamps to install the sensor, involves many components, and has a complex installation process. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a return cable status monitoring and early warning device with a ring-shaped monitoring sensor. The ring-shaped monitoring sensor can be fitted onto the return cable, making installation convenient and difficult to remove after installation, thus improving anti-theft performance.

[0005] A return cable status monitoring and early warning device with a ring monitoring sensor according to an embodiment of the present invention includes:

[0006] A monitoring sensor, wherein the monitoring sensor is provided with a through hole for the return cable to pass through;

[0007] A wear-resistant pad is attached to the inner wall of the through hole, and the wear-resistant pad is used to abut against the return cable to limit the movement of the monitoring sensor on the return cable;

[0008] A monitoring and processing component includes a controller, a data acquisition unit, and an alarm. The controller is electrically connected to the data acquisition unit and the alarm. The data acquisition unit is electrically connected to the monitoring sensor. The data acquisition unit is used to acquire detection information from the monitoring sensor. The controller is configured to control the alarm to issue an alarm based on the detection information acquired by the data acquisition unit.

[0009] A return cable status monitoring and early warning device with a ring monitoring sensor according to an embodiment of the present invention has at least the following beneficial effects:

[0010] The monitoring sensor monitors the return cable, and the data acquisition unit collects the monitoring information from the sensor. The controller, based on the information acquired by the data acquisition unit, controls the alarm to issue an alarm. The ring-shaped monitoring sensor is directly sleeved on the return cable, and a wear-resistant pad is provided on the inner wall of the through-hole to easily restrain the ring-shaped monitoring sensor in a fixed position on the return cable, preventing the sensor from sliding on the cable. This facilitates installation, makes it difficult to remove after installation, and improves anti-theft performance. Real-time monitoring of the return cable can reduce the risk of theft.

[0011] According to some embodiments of the present invention, the monitoring sensor is made of a soft and elastic material, the monitoring sensor is arranged in a ring shape, and the through hole is an elliptical through hole. The monitoring sensor includes two long sides and two short sides. The two ends of the long sides are respectively connected to the two short sides, and the two ends of the short sides are respectively connected to the two long sides. The distance between the centers of the two short sides is greater than the distance between the centers of the two long sides. The monitoring sensor is configured to increase the distance between the centers of the two long sides when the two short sides are compressed.

[0012] According to some embodiments of the present invention, the wear-resistant pad is attached to the long side.

[0013] According to some embodiments of the present invention, a V-shaped groove is provided on the wear-resistant pad at the center position corresponding to the long side, and the opening of the V-shaped groove faces the center of the monitoring sensor.

[0014] According to some embodiments of the present invention, the inner wall of the V-shaped groove is provided with multiple anti-slip grooves.

[0015] According to some embodiments of the present invention, the wear-resistant pad is adhered to the inner wall of the through hole by an adhesive layer.

[0016] According to some embodiments of this utility model, the monitoring sensor is internally provided with a voltage coupling coil and a current coupling coil. The monitoring processing component is connected to the monitoring sensor via a connecting cable. The monitoring processing component also includes a signal output module. The controller is electrically connected to the signal output module, and the signal output module is electrically connected to the voltage coupling coil. The signal output module is used to input an excitation voltage signal to the voltage coupling coil. The voltage coupling coil is used to couple the excitation voltage signal to the return cable. The data acquisition unit is electrically connected to the current coupling coil, and the current coupling coil is used to acquire the excitation current of the return cable and transmit it to the data acquisition unit.

[0017] According to some embodiments of this utility model, the monitoring sensor is further provided with an open circuit protection module and an overvoltage protection module. The open circuit protection module is connected in parallel to the secondary output terminals of the voltage coupling coil and the current coupling coil. One end of the overvoltage protection module is connected to the secondary output terminals of the voltage coupling coil and the current coupling coil, and the other end of the overvoltage protection module is grounded.

[0018] According to some embodiments of the present invention, the monitoring and processing component further includes a packaging box, a display screen, a power supply module, and a communication module. The display screen, the power supply module, and the communication module are all electrically connected to the controller. The communication module is used to report the monitored return cable status to the monitoring platform. The display screen is mounted on the packaging box, and the power supply module, the communication module, the controller, and the signal output module are all installed inside the packaging box.

[0019] According to some embodiments of the present invention, the alarm includes a switch output module and an audible and visual alarm module. Both the switch output module and the audible and visual alarm module are electrically connected to the controller. The switch output module is used to output switch quantity changes, and the audible and visual alarm module is used to output audible and visual alarm signals.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 This is a schematic diagram of the structure of the return cable status monitoring and early warning device with a ring monitoring sensor according to an embodiment of the present invention;

[0023] Figure 2 This is a structural block diagram of the return cable status monitoring and early warning device with a ring monitoring sensor according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the monitoring sensor of the return cable status monitoring and early warning device with ring monitoring sensor according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the two short sides of the monitoring sensor of the return cable status monitoring and early warning device with ring monitoring sensor according to an embodiment of the present invention, when the two short sides of the monitoring sensor are under pressure.

[0026] Figure 5 This is a schematic diagram of the installation of the monitoring sensor in the return cable status monitoring and early warning device with ring monitoring sensor according to an embodiment of the present invention.

[0027] Icon labels:

[0028] 100. Monitoring sensor; 110. Through hole; 120. Wear-resistant pad; 121. V-groove; 122. Anti-slip groove; 130. Long side; 140. Short side; 150. Voltage coupling coil; 160. Current coupling coil; 170. Open circuit protection module; 180. Overvoltage protection module;

[0029] 200. Monitoring and processing components; 210. Controller; 220. Data acquisition unit; 230. Alarm device; 231. Switch output module; 232. Audible and visual alarm module; 240. Signal output module; 250. Encapsulation box; 260. Display screen; 270. Power supply module; 280. Communication module;

[0030] 300. Connecting cables. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Please see Figure 1 , Figure 2 and Figure 3 This invention discloses a return cable status monitoring and early warning device with a ring-shaped monitoring sensor, comprising a monitoring sensor 100, a wear-resistant pad 120, and a monitoring processing component 200. The monitoring sensor 100 has a through hole 110 for the return cable to pass through. The wear-resistant pad 120 is connected to the inner wall of the through hole 110 and abuts against the return cable to restrict the movement of the monitoring sensor 100 on the return cable. The monitoring processing component 200 includes a controller 210, a data acquisition unit 220, and an alarm 230. The controller 210 is electrically connected to the data acquisition unit 220 and the alarm 230. The data acquisition unit 220 is electrically connected to the monitoring sensor 100 and is used to acquire detection information from the monitoring sensor 100. The controller 210 is configured to control the alarm 230 to issue an alarm based on the detection information acquired by the data acquisition unit 220.

[0035] The monitoring sensor 100 monitors the return cable, and the data acquisition unit 220 collects the monitoring information from the monitoring sensor 100. The controller 210, based on the monitoring information acquired by the data acquisition unit 220, controls the alarm 230 to issue an alarm. The ring-shaped monitoring sensor 100 is directly sleeved on the return cable. A wear-resistant pad 120 is provided on the inner wall of the through hole 110 to easily restrict the ring-shaped monitoring sensor 100 to a fixed position on the return cable, preventing it from sliding. This facilitates installation, makes it difficult to remove after installation, and improves anti-theft performance. Real-time monitoring of the return cable can reduce the risk of theft.

[0036] In some embodiments, see Figure 3 , Figure 4 and Figure 5 The monitoring sensor 100 is made of a soft and elastic material. It is annularly arranged, and the through-hole 110 is elliptical. The monitoring sensor 100 includes two long sides 130 and two short sides 140. The two ends of each long side 130 are connected to the two short sides 140, and the two ends of each short side 140 are connected to the two long sides 130. The distance between the centers of the two short sides 140 is greater than the distance between the centers of the two long sides 130. When the two short sides 140 are compressed, the distance between the centers of the two long sides 130 increases, and the distance between the centers of the two short sides 140 decreases. When the pressure on the two short sides 140 disappears, the monitoring sensor 100 resets, the distance between the centers of the two long sides 130 decreases, and the distance between the centers of the two short sides 140 increases.

[0037] During installation, the two short sides 140 can be squeezed to deform the elliptical through hole 110 into a near-circular shape, facilitating the passage of the return cable. After the monitoring sensor 100 is installed in the appropriate position, the pressure on the two short sides 140 is released, the monitoring sensor 100 resets, and the return cable is clamped on the inner wall of the two long sides 130 corresponding to the through hole 110.

[0038] In some embodiments, see Figure 3 , Figure 4 and Figure 5 The wear-resistant pad 120 is connected to the long side 130. The through hole 110 is an elliptical through hole 110. The monitoring sensor 100 is elastic. The distance between the two long sides 130 of the monitoring sensor 100 is short. After the monitoring sensor 100 is installed, the two long sides 130 are clamped on the return cable. The wear-resistant pad 120 is set on the long side 130 to facilitate the wear-resistant pad 120 abutting against the return cable.

[0039] In some embodiments, see Figure 3 , Figure 4 and Figure 5A V-groove 121 is provided on the wear-resistant pad 120 at the center position corresponding to the long side 130, and the opening of the V-groove 121 faces the center of the monitoring sensor 100. The V-groove 121 can improve the clamping effect of the wear-resistant pad 120 on the return cable.

[0040] In some embodiments, see Figure 3 , Figure 4 and Figure 5 The inner wall of the V-groove 121 is provided with multiple anti-slip grooves 122, which can further improve the friction effect between the wear-resistant pad 120 and the return cable.

[0041] In some embodiments, see Figure 3 , Figure 4 and Figure 5 The wear-resistant pad 120 is adhered to the inner wall of the through hole 110 by an adhesive layer, making it easy to install, remove and replace.

[0042] In some embodiments, see Figure 1 and Figure 2 The monitoring sensor 100 internally includes a voltage coupling coil 150 and a current coupling coil 160. The monitoring processing component 200 is connected to the monitoring sensor 100 via a connecting cable 300. The monitoring processing component 200 also includes a signal output module 240. The controller 210 is electrically connected to the signal output module 240, which is also electrically connected to the voltage coupling coil 150. The signal output module 240 is used to input an excitation voltage signal to the voltage coupling coil 150, which couples the excitation voltage signal to the return cable. The data acquisition unit 220 is electrically connected to the current coupling coil 160, which collects the excitation current of the return cable and transmits it to the data acquisition unit 220.

[0043] The controller 210 controls the signal output module 240 to output an excitation voltage signal with a fixed frequency and amplitude, which is transmitted to the voltage coupling coil 150 in the monitoring sensor 100 via the connecting cable 300. The voltage coupling coil 150 couples the excitation voltage to the monitored return cable using electromagnetic coupling, generating an excitation current in the return cable. This excitation current in the return cable is also collected by the current coupling coil 160 using electromagnetic coupling and transmitted to the data acquisition unit 220 via the connecting cable 300. The controller 210 processes the voltage value output by the signal output module 240 and the current value obtained by the data acquisition unit 220 to obtain the resistance value of the loop formed between the return cable and the ground.

[0044] When the return cable is in normal condition, the resistance value obtained after analysis and calculation should be within 10Ω. When the resistance value exceeds 10Ω, it indicates that there may be an unreliable defect in the connection between the return cable and the ground, or that the return cable has been stolen or cut, causing a short circuit between the return cable and the ground.

[0045] If the measured resistance exceeds the standard, it may indicate that the connection is unreliable or the return cable has been stolen. The controller 210 will control the alarm 230 to issue an alarm.

[0046] The device effectively avoids problems such as insulation damage, protector breakdown, and sheath grounding caused by excessive sheath voltage due to line impact after the return cable is stolen. It effectively reduces the operation and maintenance pressure of staff and improves the digitalization and intelligence level of transmission line operation and maintenance.

[0047] In some embodiments, see Figure 1 and Figure 2 The monitoring sensor 100 also includes an open-circuit protection module 170, an overvoltage protection module 180, and a grounding wire. The open-circuit protection module 170 is connected in parallel to the secondary output terminals of the voltage coupling coil 150 and the current coupling coil 160 to prevent excessive open-circuit voltage from injuring people when the connecting cable 300 between the monitoring sensor 100 and the monitoring processing component 200 is disconnected. One end of the overvoltage protection module 180 is connected to the secondary output terminals of the voltage coupling coil 150 and the current coupling coil 160, and the other end is connected to the grounding wire. The grounding wire is grounded to prevent the induced overvoltage generated on the coil from damaging the monitoring processing component 200 when an overvoltage occurs on the return cable during a line fault.

[0048] The device can effectively prevent high-voltage cable insulation damage, protector breakdown, and sheath grounding caused by line impact due to the theft of the return cable. It effectively reduces the operation and maintenance pressure of staff and improves the digitalization and intelligence level of transmission line operation and maintenance.

[0049] In some embodiments, see Figure 1 and Figure 2 The monitoring and processing component 200 also includes a housing 250, a display screen 260, a power module 270, and a communication module 280. The display screen 260, power module 270, and communication module 280 are all electrically connected to the controller 210. The communication module 280 is used to report the status of the monitored return cable to the monitoring platform. The display screen 260 is mounted on the housing 250. The power module 270, communication module 280, controller 210, data acquisition unit 220, alarm 230, and signal output module 240 are all installed inside the housing 250.

[0050] If the measured resistance exceeds the standard, it may indicate an unreliable connection or that the return cable has been stolen or cut. The controller 210 will then activate the alarm 230 to issue an alert. Simultaneously, the measured resistance value and alarm status will be wirelessly transmitted to the monitoring platform via the communication module 280 to alert maintenance personnel.

[0051] In some embodiments, see Figure 1 and Figure 2 The alarm 230 includes a switch output module 231 and an audible and visual alarm module 232. Both the switch output module 231 and the audible and visual alarm module 232 are electrically connected to the controller 210. The switch output module 231 is used to output switch quantity changes, and the audible and visual alarm module 232 is used to output audible and visual alarms. The controller 210 is connected to the switch output module 231 and the audible and visual alarm module 232. When the return cable is loosely connected to the grounding grid or stolen, a warning is issued through switch quantity changes and audible and visual alarms.

[0052] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0053] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A return cable status monitoring and early warning device with a ring-shaped monitoring sensor, characterized in that, include: A monitoring sensor, wherein the monitoring sensor is provided with a through hole for the return cable to pass through; A wear-resistant pad is attached to the inner wall of the through hole, and the wear-resistant pad is used to abut against the return cable to limit the movement of the monitoring sensor on the return cable; A monitoring and processing component includes a controller, a data acquisition unit, and an alarm. The controller is electrically connected to the data acquisition unit and the alarm. The data acquisition unit is electrically connected to the monitoring sensor. The data acquisition unit is used to acquire detection information from the monitoring sensor. The controller is configured to control the alarm to issue an alarm based on the detection information acquired by the data acquisition unit.

2. The return cable status monitoring and early warning device with a ring monitoring sensor according to claim 1, characterized in that, The monitoring sensor is made of a soft and elastic material. The monitoring sensor is arranged in a ring shape, and the through hole is an elliptical through hole. The monitoring sensor includes two long sides and two short sides. The two ends of the long sides are respectively connected to the two short sides, and the two ends of the short sides are respectively connected to the two long sides. The distance between the centers of the two short sides is greater than the distance between the centers of the two long sides. The monitoring sensor is configured to increase the distance between the centers of the two long sides when the two short sides are compressed.

3. The return cable status monitoring and early warning device with a ring monitoring sensor according to claim 2, characterized in that, The wear-resistant pad is attached to the long side.

4. The return cable status monitoring and early warning device with a ring monitoring sensor according to claim 3, characterized in that, A V-shaped groove is provided on the wear-resistant pad at the center position corresponding to the long side, and the opening of the V-shaped groove faces the center of the monitoring sensor.

5. The return cable status monitoring and early warning device with a ring monitoring sensor according to claim 4, characterized in that, The inner wall of the V-shaped groove is provided with multiple anti-slip grooves.

6. The return cable status monitoring and early warning device with a ring monitoring sensor according to claim 1, characterized in that, The wear-resistant pad is adhered to the inner wall of the through hole by an adhesive layer.

7. The return cable status monitoring and early warning device with a ring monitoring sensor according to claim 1, characterized in that, The monitoring sensor is internally equipped with a voltage coupling coil and a current coupling coil. The monitoring processing component is connected to the monitoring sensor via a connecting cable. The monitoring processing component also includes a signal output module. The controller is electrically connected to the signal output module, and the signal output module is electrically connected to the voltage coupling coil. The signal output module is used to input an excitation voltage signal to the voltage coupling coil. The voltage coupling coil is used to couple the excitation voltage signal to the return cable. The data acquisition unit is electrically connected to the current coupling coil, and the current coupling coil is used to acquire the excitation current of the return cable and transmit it to the data acquisition unit.

8. A return cable status monitoring and early warning device with a ring monitoring sensor according to claim 7, characterized in that, The monitoring sensor is also equipped with an open circuit protection module and an overvoltage protection module. The open circuit protection module is connected in parallel to the secondary output terminals of the voltage coupling coil and the current coupling coil. One end of the overvoltage protection module is connected to the secondary output terminals of the voltage coupling coil and the current coupling coil, and the other end of the overvoltage protection module is grounded.

9. A return cable status monitoring and early warning device with a ring monitoring sensor according to claim 7, characterized in that, The monitoring and processing component further includes a packaging box, a display screen, a power supply module, and a communication module. The display screen, the power supply module, and the communication module are all electrically connected to the controller. The communication module is used to report the monitored return cable status to the monitoring platform. The display screen is mounted on the packaging box, and the power supply module, the communication module, the controller, and the signal output module are all installed inside the packaging box.

10. A return cable status monitoring and early warning device with a ring monitoring sensor according to claim 1, characterized in that, The alarm includes a switch output module and an audible and visual alarm module. Both the switch output module and the audible and visual alarm module are electrically connected to the controller. The switch output module is used to output switch quantity changes, and the audible and visual alarm module is used to output audible and visual alarm signals.

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