A grounding loop current cable anti-theft device

Abstract

This utility model discloses a grounding circulating current cable anti-theft device, comprising: a housing, a sensing unit, and a controller, wherein the sensing unit and the controller are fixed inside the housing; the sensing unit includes a circulating current sensor and an anti-theft sensor; the circulating current sensor is connected to the cable through a sensing ring to monitor the current value passing through the cable in real time; the anti-theft sensor includes a distance sensor and a disconnect switch, the distance sensor being directly opposite the cable, and the circulating current sensor being connected to the sensing ring through the disconnect switch; a cover plate is provided on the housing, and a sealing ring is provided between the housing and the cover plate. By setting up the sensing unit and the controller, the circulating current sensor can monitor the current value of the cable in real time, the distance sensor can monitor the distance between the housing and the cable in real time, and the disconnect switch can quickly and accurately send an alarm signal to the controller when disconnected, thereby improving the anti-theft performance and operational stability of the grounding circulating current cable anti-theft device.

Description

Technical Field

[0001] This utility model relates to the field of cable anti-theft technology, and in particular to an anti-theft device for grounded circulating current cables. Background Technology

[0002] With the continuous development of power systems, the scale and complexity of cable lines are constantly increasing, and the problem of grounding current circulation is becoming increasingly prominent. High-voltage cables have a metal sheath. When conducting electrical energy, the current in the core will cause electromagnetic induction through a cutting phenomenon with the outer metal sheath, generating an induced voltage. Excessive voltage can affect the sheath and even cause cable breakdown. Grounding current circulation refers to the phenomenon where, during operation, the outer sheath of the cable may be damaged at multiple points due to mechanical damage, chemical corrosion, rodent damage, water ingress into the protection box, overvoltage protection device breakdown, or disconnection of the metal sheath grounding wire, causing a circuit to form through the metal sheath to the ground, resulting in a grounding current circulation. To improve the operational stability of cable lines, it is necessary to monitor the grounding current in real time. At the same time, due to their high economic value, power cables become targets for theft, leading to frequent cable theft incidents. To avoid huge economic losses and power supply security risks, anti-theft devices are also needed in addition to monitoring the grounding current. Existing cable anti-theft devices use high-precision sensors such as gyroscopes to monitor the cable status in order to improve sensitivity and anti-theft performance. However, gyroscope sensors are susceptible to interference from the external environment, which may lead to false alarms or missed alarms in the anti-theft system, and also increase the manufacturing cost of cable anti-theft devices. Utility Model Content

[0003] To address the aforementioned problems, the purpose of this invention is to provide a grounding loop current cable anti-theft device that can accurately send alarm signals to the controller through an anti-theft sensor, thereby reducing the risk of interference and improving the anti-theft performance of the grounding loop current cable anti-theft device.

[0004] The technical solution adopted by this utility model to solve its problem is:

[0005] This application provides a grounding circulating current cable anti-theft device, including: a housing, a sensing unit, and a controller, wherein the sensing unit and the controller are fixed inside the housing; the sensing unit includes a circulating current sensor and an anti-theft sensor; the circulating current sensor is connected to the cable through a sensing ring to monitor the current value passing through the cable in real time; the anti-theft sensor includes a distance sensor and a disconnect switch, wherein the distance sensor is positioned directly opposite the cable, and the circulating current sensor is connected to the sensing ring through the disconnect switch; the circulating current sensor, the distance sensor, and the disconnect switch are all electrically connected to the controller; a cover plate is provided on the housing, and a sealing ring is provided between the housing and the cover plate.

[0006] The aforementioned anti-theft device for grounded circulating current cables has at least the following beneficial effects: By setting up a sensing unit and a controller, the circulating current sensor can monitor the current value of the cable in real time, the distance sensor can monitor the distance between the outer casing and the cable in real time, and the disconnect switch can quickly and accurately send an alarm signal to the controller when disconnected, reducing the interference risk of the sensing unit and improving the anti-theft performance and operational stability of the anti-theft device for grounded circulating current cables; By setting up an outer casing and a sensing unit, the circulating current sensor and the anti-theft sensor can be stably fixed inside the outer casing, and the waterproof and sealing properties of the outer casing are ensured by the cover plate and sealing ring, thereby improving the service life of the anti-theft device for grounded circulating current cables.

[0007] Furthermore, the cover plate is provided with a connection port, through which the circulating current sensor is connected to the sensing ring. By providing the connection port, the circulating current sensor can be flexibly connected to the sensing ring, improving the installation convenience of the grounding circulating current cable anti-theft device.

[0008] Furthermore, the connection port is an aviation connector. Aviation connectors have the advantages of high protection and resistance to extreme environments. Using aviation connectors can effectively ensure the connection stability between the circulating current sensor and the sensing loop, and avoid false alarms caused by the anti-theft device for the grounding circulating current cable.

[0009] Furthermore, the controller is also connected to a communication module, which is used to transmit the current value and the alarm signal issued by the controller. By setting up a communication module, the controller can easily transmit the current value and alarm signal to the outside world, so as to realize real-time monitoring of the current value and rapid sending of alarm signals, thereby improving the anti-theft performance of the grounding loop current cable anti-theft device.

[0010] Furthermore, the communication module is a wireless 485 transmission module. Wireless 485 transmission modules have the advantages of wide communication range and stable data transmission, effectively improving the data transmission stability of the grounding loop current cable anti-theft device.

[0011] Furthermore, a fixing bracket is provided at the bottom of the outer casing, and the outer casing is detachably connected to the cable through the fixing bracket. By providing the fixing bracket, it is easy to quickly and stably fix the outer casing to the cable, preventing the outer casing from shifting or loosening.

[0012] Furthermore, the outer casing has an opening, and the opening has a latch that engages with the cover plate. By providing the opening, the cover plate can be easily secured to the outer casing via the latch, improving the ease of installation of the grounding loop current cable anti-theft device.

[0013] Furthermore, the sealing ring is fitted onto the opening. This structure ensures that the sealing ring can be stably installed between the opening and the cover plate, improving the sealing and waterproof performance of the housing.

[0014] Furthermore, the sealing ring is made of hydrogenated nitrile butadiene rubber. Hydrogenated nitrile butadiene rubber has excellent temperature resistance, aging resistance, and airtightness. The sealing ring made of hydrogenated nitrile butadiene rubber effectively improves the waterproof performance and service life of the anti-theft device for grounding circulating current cables.

[0015] Furthermore, the outer casing is made of SMC material. SMC material has the advantages of being lightweight, corrosion-resistant, and having strong insulation properties. Making the outer casing of the grounding loop current cable anti-theft device can effectively reduce the weight of the device and increase its service life.

[0016] The beneficial effects of the aforementioned anti-theft device for grounding circulating current cables are as follows: By setting up a sensing unit and a controller, the circulating current sensor can monitor the current value of the cable in real time, the distance sensor can monitor the distance between the outer casing and the cable in real time, and the disconnect switch can quickly and accurately send an alarm signal to the controller when disconnected, reducing the interference risk of the sensing unit and improving the anti-theft performance and operational stability of the anti-theft device for grounding circulating current cables; By setting up an outer casing and a sensing unit, the circulating current sensor and the anti-theft sensor can be stably fixed inside the casing, and the waterproof and sealing properties of the casing are ensured by the cover plate and sealing ring, improving the service life of the anti-theft device for grounding circulating current cables; By setting up a connection port, the circulating current sensor can be flexibly connected to the sensing ring through the connection port, improving the installation convenience of the anti-theft device for grounding circulating current cables; By setting up a communication module, the controller can easily transmit the current value and alarm signal to the outside, so as to realize the real-time monitoring of the current value and the rapid sending of alarm signals, improving the anti-theft performance of the anti-theft device for grounding circulating current cables; By setting up a fixed bracket, the outer casing can be quickly and stably fixed to the cable, avoiding displacement or loosening of the outer casing.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a grounding circulating current cable anti-theft device according to an embodiment of the present invention;

[0019] Figure 2 This is a cross-sectional view of a grounding loop current cable anti-theft device according to an embodiment of the present invention;

[0020] Figure 3 This is an exploded view of the structure of a grounding loop current cable anti-theft device according to an embodiment of the present invention. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of the 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.

[0022] Reference Figures 1 to 3 This utility model provides a grounding circulating current cable anti-theft device, including: a housing 100, a sensing unit 200, and a controller 300, wherein the sensing unit 200 and the controller 300 are fixed inside the housing 100; the sensing unit 200 includes a circulating current sensor 210 and an anti-theft sensor 220; the circulating current sensor 210 is connected to the cable 400 through a sensing ring 211 to monitor the current value passing through the cable 400 in real time; the anti-theft sensor 220 includes a distance sensor 221 and a disconnect switch 222, wherein the distance sensor 221 is positioned directly opposite the cable 400, and the circulating current sensor 210 is connected to the sensing ring 211 through the disconnect switch 222; the circulating current sensor 210, the distance sensor 221, and the disconnect switch 222 are all electrically connected to the controller 300; a cover plate 110 is provided on the housing 100, and a sealing ring 120 is provided between the housing 100 and the cover plate 110.

[0023] By setting up the sensing unit 200 and the controller 300, the circulating current sensor 210 can monitor the current value of the cable 400 in real time, and the distance sensor 221 can monitor the distance between the housing 100 and the cable 400 in real time. When the circuit breaker 222 is disconnected, it quickly and accurately sends an alarm signal to the controller 300, reducing the interference risk of the sensing unit 200 and improving the anti-theft performance and working stability of the grounding circulating current cable anti-theft device. By setting up the housing 100 and the sensing unit 200, the circulating current sensor 210 and the anti-theft sensor 220 can be stably fixed inside the housing 100, and the waterproof and sealing properties of the housing 100 are ensured by the cover plate 110 and the sealing ring 120, thereby improving the service life of the grounding circulating current cable anti-theft device.

[0024] In another embodiment, the cover plate 110 is provided with a connection port 111, through which the circulating current sensor 210 is connected to the sensing ring 211. By providing the connection port 111, the circulating current sensor 210 can be flexibly connected to the sensing ring 211 through the connection port 111, thereby improving the installation convenience of the grounding circulating current cable anti-theft device.

[0025] In another embodiment, the connection port 111 is an aviation connector. Aviation connectors have the advantages of high protection and resistance to extreme environments. Using an aviation connector for the connection port 111 can effectively ensure the connection stability between the circulating current sensor 210 and the sensing ring 211, and avoid false alarms from the grounding circulating current cable anti-theft device.

[0026] In another embodiment, the controller 300 is also connected to a communication module 310, which is used to transmit current values ​​and alarm signals issued by the controller 300. By setting up the communication module 310, the controller 300 can easily transmit current values ​​and alarm signals to the outside world, so as to realize real-time monitoring of current values ​​and rapid sending of alarm signals, thereby improving the anti-theft performance of the grounding loop current cable anti-theft device.

[0027] In another embodiment, the communication module 310 is a wireless 485 transmission module. Wireless 485 transmission modules have the advantages of wide communication range and stable data transmission. The communication module 310, being a wireless 485 transmission module, effectively improves the data transmission stability of the grounding loop current cable anti-theft device.

[0028] In another embodiment, a fixing bracket 130 is provided below the outer casing 100, and the outer casing 100 is detachably connected to the cable 400 through the fixing bracket 130. By providing the fixing bracket 130, it is easy to quickly and stably fix the outer casing 100 to the cable 400, and to prevent the outer casing 100 from shifting or becoming loose.

[0029] In another embodiment, the housing 100 is provided with an opening 140, and the opening 140 is provided with a buckle 141 that cooperates with the cover plate 110. By providing the opening 140, the cover plate 110 can be easily fixed to the housing 100 by the buckle 141, thereby improving the ease of installation of the grounding loop current cable anti-theft device.

[0030] In another embodiment, the sealing ring 120 is fitted onto the opening 140. This structure ensures that the sealing ring 120 can be stably installed between the opening 140 and the cover plate 110, improving the sealing and waterproof performance of the housing 100.

[0031] In another embodiment, the sealing ring 120 is made of hydrogenated nitrile butadiene rubber. Hydrogenated nitrile butadiene rubber has excellent temperature resistance, aging resistance, and airtightness. The sealing ring 120, made of hydrogenated nitrile butadiene rubber, effectively improves the waterproof performance and service life of the anti-theft device for grounding circulating current cables.

[0032] In another embodiment, the housing 100 is made of SMC material. SMC material has the advantages of being lightweight, corrosion-resistant, and having strong insulation properties. Making the housing 100 of SMC material can effectively reduce the weight of the grounding loop current cable anti-theft device and increase its service life.

[0033] The working principle of this utility model will be further explained below.

[0034] In the installation process of the grounding loop current cable anti-theft device in this embodiment, a housing 100 corresponding to the sensing unit 200 and the controller 300 is selected to ensure that the sensing unit 200 and the controller 300 can be stably fixed inside the housing 100. In some embodiments, the controller 300 has up to 11 sensor access ports, which can realize a variety of combined applications and solve the adaptability problem of different applications under various complex field applications. Next, the sensing loop 211 is installed on the cable 400. Then, the loop current sensor 210, distance sensor 221, disconnect switch 222, communication module 310 and controller 300 are installed inside the housing 100, wherein one end of the loop current sensor 210 is connected to the controller 300. The other end of the circulating current sensor 210 is connected to the connection port 111 via the disconnect switch 222. Furthermore, the communication module 310, disconnect switch 222, and distance sensor 221 are all electrically connected to the controller 300, with the distance sensor 221 aligned with the cable 400. Then, a sealing ring 120 is fitted onto the opening 140, and the cover plate 110 is closed onto the opening 140. The sensing ring 211 is connected to the connection port 111 via the connecting wire 230, allowing the circulating current sensor 210 to connect with the sensing ring 211, enabling real-time monitoring of the current value within the cable 400. Finally, the housing 100 is fixed to the cable 400 using the fixing bracket 130, completing the installation of the grounding circulating current cable anti-theft device. Since the distance sensor 221, disconnect switch 222, and circulating current sensor 210 are not high-precision sensors, the installation efficiency of the grounding circulating current cable anti-theft device is greatly improved.

[0035] In the use of the grounding loop current cable anti-theft device in this embodiment, the loop current sensor 210 achieves a current measurement range of 0 to 2000A and a measurement accuracy of 0.5 class, solving the problem that existing monitoring devices cannot meet the higher requirements of power grid bidding in some areas. The anti-theft sensor 220 outputs switching signals from the distance sensor 221 and the disconnect switch 222. The controller 300 detects the reading of the distance sensor 221 and the switching signal status of the disconnect switch 222 to implement the anti-theft cutting function. When the cable 400 is cut and during transportation, the anti-theft sensor 220 installed on the cable 400 must be removed, or the connection wire between the disconnect switch 222 and the controller 300 must be cut. The anti-theft sensor 220, through the distance sensor 221, determines that the grounding loop current cable anti-theft device has been removed from the cable 400 when the reading of the distance sensor 221 is greater than a preset threshold. Furthermore, the disconnect switch 222 also has a disconnection detection function, detecting whether the connection wire between the anti-theft sensor 220 and the controller 300 has been cut. When either of the above two conditions is met, the controller 300 determines that the cable has been stolen and reports the alarm information through the communication module 310. Since the disconnect switch 222 outputs a switching signal, which has strong anti-interference capabilities, simple logic processing, and is more stable and reliable, compared to existing anti-theft devices that use gyroscope sensors and require complex logic processing, the anti-theft sensor 220 of this embodiment is not affected by the complex movement of the housing 100, such as slow movement or minimal vibration, nor is it affected by external environmental interference, such as magnetic fields or temperature, which would prevent accurate detection of cable 400 theft. The anti-theft sensor 220 only requires a proximity disconnect switch 222 and a disconnection detection circuit to achieve the anti-theft function; it does not require an internal circuit board, and this simple design increases the reliability of the device while reducing costs.

[0036] Meanwhile, the outer casing 100 and the cover plate 110 are sealed by a sealing ring 120 and then fixed by a buckle 141. The connecting wire 230 is connected to the disconnect switch 222 through the connecting port 111. It has advantages such as corrosion resistance, pressure resistance, waterproofing, safety, and convenience. This allows the outer casing 100 to maintain a good waterproof effect even under harsh environmental corrosion for a long time, ensuring that the waterproof performance of the grounding loop current cable anti-theft device reaches IP68 level and remains so for more than 10 years.

[0037] As can be seen from the above description, the grounding loop current cable anti-theft device of this utility model, by setting up a sensing unit 200 and a controller 300, allows the loop current sensor 210 to monitor the current value of the cable 400 in real time, and the distance sensor 221 to monitor the distance between the outer casing 100 and the cable 400 in real time. When the disconnect switch 222 is disconnected, it quickly and accurately sends an alarm signal to the controller 300, reducing the interference risk of the sensing unit 200 and improving the anti-theft performance and operational stability of the grounding loop current cable anti-theft device. By setting up the outer casing 100 and the sensing unit 200, the loop current sensor 210 and the anti-theft sensor 220 can be stably fixed inside the outer casing 100, and connected via the cover plate 110 and... The sealing ring 120 ensures the waterproofness and sealing of the outer casing 100, improving the service life of the grounding current cable anti-theft device; the connection port 111 facilitates the flexible connection of the current sensor 210 to the sensing ring 211, improving the installation convenience of the grounding current cable anti-theft device; the communication module 310 facilitates the controller 300 to transmit current values ​​and alarm signals, enabling real-time monitoring of current values ​​and rapid alarm signal transmission, improving the anti-theft performance of the grounding current cable anti-theft device; the fixed bracket 130 facilitates the quick and stable fixing of the outer casing 100 to the cable 400, preventing displacement or loosening of the outer casing 100.

[0038] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A grounding circulating current cable anti-theft device, characterized in that, include: The system comprises a housing, a sensing unit, and a controller, wherein the sensing unit and the controller are fixed within the housing; the sensing unit includes a circulating current sensor and an anti-theft sensor. The circulating current sensor is connected to the cable via an induction ring to monitor the current value passing through the cable in real time; the anti-theft sensor includes a distance sensor and a disconnect switch, the distance sensor is positioned directly opposite the cable, and the circulating current sensor is connected to the induction ring via the disconnect switch; the circulating current sensor, the distance sensor, and the disconnect switch are all electrically connected to the controller; the housing is provided with a cover plate, and a sealing ring is provided between the housing and the cover plate.

2. The anti-theft device for a grounded circulating current cable according to claim 1, characterized in that, The cover plate is provided with a connection port, and the circulating current sensor is connected to the sensing ring through the connection port.

3. The anti-theft device for a grounded circulating current cable according to claim 2, characterized in that, The connection port is an aviation connector.

4. The anti-theft device for a grounded circulating current cable according to claim 1, characterized in that, The controller is also connected to a communication module, which is used to transmit the current value and the alarm signal issued by the controller.

5. The anti-theft device for a grounded circulating current cable according to claim 4, characterized in that, The communication module is a wireless transmission module.

6. The anti-theft device for a grounded circulating current cable according to claim 1, characterized in that, A fixing bracket is also provided at the bottom of the housing, and the housing is detachably connected to the cable through the fixing bracket.

7. The anti-theft device for a grounded circulating current cable according to claim 1, characterized in that, The outer casing has an opening, and the opening has a buckle that engages with the cover plate.

8. The anti-theft device for a grounded circulating current cable according to claim 7, characterized in that, The sealing ring is fitted onto the opening.

9. A grounding loop current cable anti-theft device according to claim 8, characterized in that, The sealing ring is made of hydrogenated nitrile rubber.

10. A grounding loop current cable anti-theft device according to claim 1, characterized in that, The outer shell is made of SMC material.

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