Automatic line patrol device for low-voltage cable trench

Abstract

The utility model discloses an automatic line patrol device for pressing a cable trench, which adopts a line patrol trolley to advance along a built-in track, and comprises a hollow line patrol trolley main body for accommodating driving wheels and a line patrol track; an externally or internally mounted driving motor activates the driving wheels through a transmission system; the gas cylinder assembly assembled at the top is connected with a shunting concentrator through a main gas pipe, and the concentrator distributes gas to a plurality of branch gas pipes with independent gas valves; a plurality of groups of blowing nozzles are arranged beside sensors and infrared cameras of the trolley and are used for cleaning dust and ensuring accurate monitoring; and the control module is responsible for data acquisition and storage and air valve timing control so as to maintain efficient operation of the system. According to the utility model, unattended operation of the cable trench is realized, frequent maintenance is not needed, and stable and controllable data and safety inspection are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of cable safety protection, and is applicable to low-voltage cable trenches. Specifically, it is an automatic line inspection device for low-voltage cable trenches. Background Technique

[0002] A low-voltage cable trench is an underground passage for laying low-voltage power cables. It provides space for cable installation, maintenance, and replacement, and also protects the cables from the external environment. The design of the cable trench usually includes appropriate ventilation, lighting, fire prevention measures, etc. to ensure the safe operation of the cables. The line inspection trolley in the cable trench is an automatic device used to regularly or irregularly check the internal conditions of the cable trench, including the status of the cables and the safety of the internal environment of the trench. Such trolleys are usually equipped with various sensors (such as temperature, humidity, gas detectors) and cameras to enable operators to remotely monitor the status of the cable trench. The functions of the line inspection trolley mainly include: 1. Regular inspection: Check whether the cables are damaged, overheated, etc. 2. Environmental monitoring: Monitor environmental factors such as temperature and humidity in the cable trench to prevent cable damage caused by harsh environments. 3. Abnormal alarm: Send an alarm in a timely manner when an abnormal situation is detected to remind the management to take measures. 4. Data collection: Record various data during the inspection process for later analysis. The use of the automatic line inspection trolley is very necessary for improving the safety of the cable trench and reducing the risk of manual inspection. It can reduce labor costs, improve work efficiency, and also can more accurately detect potential problems.

[0003] However, the current automatic line inspection trolleys also have some deficiencies: 1. The problem of track cleaning: If too much dust or debris accumulates on the tracks in the cable trench, it may hinder the normal operation of the inspection trolley and reduce its work efficiency. 2. The problem of sensor failure: Dust covering the sensors may cause them to not correctly read data or even completely fail. 3. Inability to respond to disasters in a timely manner: Although the inspection trolley can detect dangerous situations such as fires in advance, since it does not have its own fire extinguishing function, it still relies on external fire protection systems to extinguish the initial fire when a fire occurs. Summary of the Invention

[0004] In view of the many defects and deficiencies in the above background technique, the inventor has made improvements and innovations. After design and experiments, an automatic line inspection device for low-voltage cable trenches is finally provided, which can realize self-cleaning of the tracks and sensor components, keep the inspection vehicle running for a long time without frequent maintenance, and can improve the normal and stable operation of the sensor components. Improve the reliability of inspection data.

[0005] Specifically, the present utility model is implemented as follows: An automatic line inspection device for a low-voltage cable trench, including a main body of a line inspection trolley installed on a line inspection track erected along the inside of the low-voltage cable trench, further including:

[0006] An internal through cavity is provided in the middle of the main body of the line inspection trolley, running through the front and back of it, forming a channel-like structure for installing driving wheels; the line inspection track passes through the internal through cavity, and the driving wheels are hung on the rail surface of the line inspection track.

[0007] A driving motor is installed on the outside or inside of the main body of the line inspection trolley, and is connected to the driving wheels installed in the internal through cavity through a transmission mechanism or directly.

[0008] A gas cylinder assembly is installed on the top of the main body of the line inspection trolley, and is connected to a shunt hub installed on the main body of the line inspection trolley through a main air pipe. The intake end of the shunt hub is connected to the main air pipe, and the outlet end has several, each installed with an independent air valve, and is connected to the intake end of the branch air pipe.

[0009] There are several blowing nozzles, each installed on the main body of the line inspection trolley through a nozzle bracket. The blowing nozzles are connected to the outlet ends of the branch air pipes, and the blowing nozzles are respectively arranged near the sensing components and infrared cameras on the line inspection trolley and obliquely face the sensing components and infrared cameras.

[0010] A control module is used to connect to the sensing components and infrared cameras for data collection and storage, and is also connected to the air valves, and can control the timing opening and closing of the air valves.

[0011] Preferably, the gas cylinder assembly is a single gas cylinder filled with compressed air, and further includes several track cleaning nozzles. The track cleaning nozzles are respectively installed at the front and rear ends of the line inspection trolley, and obliquely face the track surface downward from above the track surface of the line inspection track, and are all connected to the shunt hub through their respective branch air pipes.

[0012] Preferably, a pressure reducing valve is installed at the air outlet of the gas cylinder assembly, and is connected to the main air pipe through the pressure reducing valve. The shunt hub is in the shape of a manifold and has at least two electromagnetic air valves. One is connected to the branch air pipe connected to the track cleaning nozzles, and the other is connected to the branch air pipe connected to the blowing nozzles; the electromagnetic air valves are connected to the control module.

[0013] Preferably, a storage battery is installed on the main body of the line inspection trolley to supply power to the driving motor, sensing components, infrared cameras, control module, and air valves; the line inspection track is an I-beam track, and the driving wheels are an active driving wheel and a passive driving wheel. Among them, the active driving wheel is connected to the driving motor through a transmission mechanism or directly, and the passive driving wheel is arranged on the opposite side of the active driving wheel. The active driving wheel and the passive driving wheel can be multiple groups, or one active driving wheel and several passive driving wheels, which are respectively installed on the two track surfaces of the line inspection track.

[0014] Preferably, at least a pair of limiting guide wheels are further installed in the internal through cavity. The limiting guide wheels are horizontally arranged and are respectively installed on the two side walls of the internal through cavity, and respectively contact the vertical surfaces on both sides of the I-beam track from the two sides of the vertical surface.

[0015] Preferably, the sensing components include an infrared sensor, a temperature and humidity sensor, a gas detection sensor, a partial discharge detection sensor, and a smoke sensor; they are respectively installed on the main body of the line patrol vehicle; there are four infrared cameras, with every two as a group, which are respectively installed on both sides of the main body of the line patrol vehicle for image acquisition of the low-voltage cable areas on both sides.

[0016] Preferably, the gas cylinder assembly further includes a carbon dioxide fire extinguishing gas cylinder. The carbon dioxide fire extinguishing gas cylinder is connected to the release mechanism. The release mechanism is installed on the top of the main body of the line patrol vehicle and includes a fire extinguishing control valve connected to the control module. A carbon dioxide gas pipe is connected between the fire extinguishing nozzle and the fire extinguishing control valve. There are at least two fire extinguishing nozzles, which are located on both sides of the main body of the line patrol vehicle, and the spraying range can cover the areas where the cables are located on both sides.

[0017] Preferably, a communication module is further included. The communication module is connected to the control module and is internally provided with a wireless signal transmission antenna and a wireless signal receiving and transmitting unit. The wireless signal transmission antenna can transmit the data signal sent by the control module to the background monitoring terminal through the wireless signal receiving and transmitting unit for data transmission and reception, and can feedback to the control module to realize remote data reception or remote control of the line patrol vehicle.

[0018] Working principle of the utility model: The main body of the line patrol vehicle moves along a pre-laid line patrol track (such as an I-beam track), and runs on the track through the driving wheels (including the active driving wheels and the passive driving wheels) in the internal through cavity. The driving wheels are driven by a driving motor through a transmission mechanism, enabling the line patrol vehicle to move forward or backward automatically. The compressed air provided by the gas cylinder assembly is distributed to different gas nozzles via the main air pipe, the shunt hub, and the branch air pipes, including the blowing nozzle and the track cleaning nozzle. The blowing nozzle is installed on the main body of the line patrol vehicle to remove dust and debris around the sensing element and the camera, keeping them clean. The track cleaning nozzles are installed at the front and rear ends of the line patrol vehicle to clean the track surface, ensuring good grip of the driving wheels. Usually, the cleaning operation can be set to start once every few days, lasting for dozens of seconds each time; The control module collects data from various sensors (such as infrared sensors, temperature and humidity sensors, gas detection sensors, etc.), stores this data, and can also send data to the server terminal regularly or passively. It can also accept control operations of the server side to operate the vehicle. In addition, it can control the opening and closing of the electromagnetic air valve, thereby regulating the flow of compressed air. The control module can also communicate bidirectionally with the background monitoring terminal through the communication module to achieve remote monitoring and control. To deal with emergencies such as fires, the device is equipped with a carbon dioxide fire extinguishing gas cylinder. When a fire is detected, the control module will send an alarm message to the server terminal, and the fire extinguishing control valve will be manually operated remotely or automatically activated to spray carbon dioxide through the fire extinguishing nozzle to extinguish the possible fire source. Each component of the line patrol vehicle (such as the motor, sensor, camera, control module, etc.) is powered by a storage battery installed on the vehicle to ensure its continuous operation. The design of the storage battery can be set to charge in contact when stalled at the initial position, ensuring the long-term operable state of the vehicle. The limit guide wheels are installed on both sides of the internal through cavity to prevent the line patrol vehicle from deviating on the track. Multiple sensors and infrared cameras provide all-round monitoring to ensure the safety of the cable trench environment.

[0019] The beneficial effects of the utility model compared with the prior art are as follows:

[0020] (1) Reliable inspection data and high inspection efficiency: Due to the environmental factors in the underground cable trench, there may be more dust, which will cover the surface of the sensor components over a long period of time in a few days. The compressed air is used to remove the dust or impurities around the sensing components and the infrared camera through the blowing nozzle, keeping the surfaces of these key components clean, ensuring that they can continue to work normally during operation, improving the maintenance conditions during the line patrol process without manual handling; increasing the stability and reliability of the inspection data. And the blowing treatment of the track surface can blow away the dust and debris falling on the track surface.

[0021] (2) Enhanced safety: The gas cylinder assembly not only provides a cleaning function but also can be equipped with a carbon dioxide fire extinguishing gas cylinder for fire emergency treatment, increasing the safety protection function of the cable trench inspection trolley and reducing the risk of fire caused by cable failures in the cable trench. Compared with the traditional brush for cleaning the track, when the brush contacts and moves on the track surface, charge separation may occur due to friction, resulting in static electricity. Static electricity discharge can become a safety hazard, such as potentially causing sparks and then leading to fire or explosion, especially if there are special circumstances in the cable trench, such as leakage of flammable and explosive gases or other sensitive electrical equipment. Using air or carbon dioxide as the purging gas source is cost-effective, safe and reliable, with high purging accuracy, small gas volume and high cleaning efficiency. This utility model is equipped with various types of sensing components (such as infrared sensors, temperature and humidity sensors, etc.) and infrared cameras, which can comprehensively monitor the environmental status of the cable trench, promptly detect potential hazards and ensure the safe operation of the cables.

[0022] (3) Facilitate remote management: The addition of the communication module enables the cable trench inspection trolley to communicate bidirectionally with the background monitoring terminal, facilitating managers to understand the status of the cable trench in real time and remotely control the operation of the cable trench inspection trolley, enhancing the flexibility and response speed of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following further elaborates on the specific implementation manners of the present invention in conjunction with the drawings, where:

[0024] Figure 1 is a three-dimensional structure diagram of the automatic cable trench inspection device of the present utility model;

[0025] Figure 2 is a schematic diagram of the automatic cable trench inspection device of the present utility model installed on the inspection track;

[0026] Figure 3 is a schematic diagram of the usage state of the automatic cable trench inspection device of the present utility model in the low-voltage cable trench;

[0027] Figure 4 is a three-dimensional diagram of the usage state of the automatic cable trench inspection device of the present utility model in the low-voltage cable trench;

[0028] Figure 5 is a schematic diagram of the installation position of the blowing nozzle facing the sensor;

[0029] Figure 6 is a schematic diagram of the structure of the present utility model with a carbon dioxide fire extinguishing gas cylinder installed;

[0030] Figure 7 is a schematic diagram of the installation position of the blowing nozzle facing the infrared camera;

[0031] Wherein: 1 - line patrol track, 2 - drive motor, 3 - gas cylinder assembly, 4 - shunt hub, 5 - branch air pipe, 6 - air blowing nozzle, 7 - nozzle bracket, 8 - infrared camera, 9 - track cleaning nozzle, 10 - main air pipe, 11 - active driving wheel, 12 - passive driving wheel, 13 - limit guide wheel, 14 - carbon dioxide fire extinguishing gas cylinder, 15 - release mechanism, 16 - fire extinguishing nozzle. Detailed implementation mode

[0032] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the technical solutions of the present utility model will be further described in detail below in conjunction with the attached drawings and specific implementation modes. It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0033] Embodiment 1: An automatic line patrol device for a low-voltage cable trench, including a line patrol trolley body installed on a line patrol track 1 erected along the inside of the low-voltage cable trench, further including:

[0034] An internal through cavity is arranged in the middle of the line patrol trolley body and penetrates through the front and rear thereof, forming a channel-like structure for installing driving wheels; the line patrol track 1 passes through the internal through cavity, and the driving wheels are hung on the rail surface of the line patrol track 1; at least a pair of limit guide wheels 13 are also installed in the internal through cavity, the limit guide wheels 13 are horizontally arranged and are respectively installed on both side walls of the internal through cavity, and respectively contact the vertical surfaces of the I-beam track from both sides of the vertical surface. The internal through cavity is a hollow structure designed in the center of the line patrol trolley body, and its function is to accommodate the line patrol track 1 and install driving wheels. The driving wheels are hung on the line patrol track 1, so that the trolley can move stably along the track. This design ensures the straight-line travel and stable support of the trolley in the cable trench. At the same time, the limit guide wheels 13 are installed on both sides of the through cavity, further ensuring the accurate guiding of the trolley on the track and preventing deviation. In actual use, the line patrol track 1 can use a rack structure, and the driving wheels can use matching gears.

[0035] A drive motor 2 is installed on the outside of the line patrol trolley body and is connected to the driving wheels installed in the internal through cavity through a transmission mechanism or directly; the drive motor 2 is installed outside the trolley, and it is connected to the driving wheels through a transmission mechanism such as a belt, a gear, etc. or directly, providing power for the trolley to move forward. This design facilitates the maintenance and replacement of the drive components, and at the same time ensures the efficiency and reliability of power transmission.

[0036] The gas cylinder assembly 3 is installed on the top of the main body of the line inspection trolley and is connected to the flow dividing hub 4 installed on the main body of the line inspection trolley through the main air pipe 10. The intake end of the flow dividing hub 4 is connected to the main air pipe 10, and the outlet end has several outlets, all of which are equipped with independent air valves and are connected to the intake ends of the branch air pipes 5; the gas cylinder assembly 3 is a single gas cylinder filled with compressed air, and further includes several track cleaning nozzles 9. The track cleaning nozzles 9 are respectively installed at the front and rear ends of the line inspection trolley and are obliquely downward from above the track surface of the line inspection track 1 towards the track surface, and are all connected to the flow dividing hub 4 through their respective branch air pipes 5. A pressure reducing valve is installed at the outlet of the gas cylinder assembly 3 and is connected to the main air pipe 10 through the pressure reducing valve. The flow dividing hub 4 is in the shape of a manifold and has at least two electromagnetic air valves, one is connected to the branch air pipe 5 connected to the track cleaning nozzle 9, and the other is connected to the branch air pipe 5 connected to the blowing nozzle 6; the electromagnetic air valve is connected to the control module. The gas cylinder assembly 3 mainly includes a gas cylinder filled with compressed air, which is connected to the flow dividing hub 4 through the main air pipe 10, and the latter then distributes air to each functional component, such as the track cleaning nozzle 9 and the blowing nozzle 6. The track cleaning nozzles 9 are installed at both ends of the trolley and spray compressed air to remove dust and debris on the track, keep the track clean, and ensure the smooth operation of the trolley. The blowing nozzle 6 is used to clean or protect the sensors and the infrared camera 8 to prevent them from being blocked by dust and ensure the accuracy of data collection. The gas cylinder assembly 3 further includes a carbon dioxide fire extinguishing gas cylinder 14. The carbon dioxide fire extinguishing gas cylinder 14 is connected to the release mechanism 15. The release mechanism 15 is installed on the top of the main body of the line inspection trolley and includes a fire extinguishing control valve connected to the control module. The carbon dioxide gas pipe is connected between the fire extinguishing nozzle 16 and the fire extinguishing control valve. There are at least two fire extinguishing nozzles 16, which are located on both sides of the main body of the line inspection trolley, and the spraying range can cover the areas where the cables are located on both sides. In order to ensure the autonomous operation of the device, a storage battery is used to supply power to the entire system, including the drive motor 2, sensors, cameras, and air valves, etc. In a specific configuration, a carbon dioxide fire extinguishing gas cylinder 14 is also equipped, and the release mechanism 15 connected to the control module can automatically release carbon dioxide for fire extinguishing when a fire risk is detected, improving the safety of the device. The control module receives information from the fire detector, namely the smoke sensor, and judges whether to start the fire extinguishing system according to the preset logic. During specific fire extinguishing, the remote operator can control the trolley to reach the fire source point according to the camera, operate the fire extinguishing control valve to start, and spray carbon dioxide fire extinguishing gas.

[0037] There are several air-blowing nozzles 6, all of which are installed on the main body of the line inspection trolley through air nozzle brackets 7. The air-blowing nozzles 6 are connected to the air outlet ends of the branch air pipes 5. Each of the air-blowing nozzles 6 is disposed near the sensing components and the infrared camera 8 on the line inspection trolley and obliquely faces the sensing components and the infrared camera 8. The control module is used to connect the sensing components and the infrared camera 8 for data collection and storage, and is also connected to the air valve to control the timing opening and closing of the air valve. The control module is the "central nervous system" of the entire device, responsible for connecting and managing all components such as sensors, cameras, and air valves. It not only collects data from infrared sensors, temperature and humidity sensors, etc., but also can control the opening and closing of the air valve according to a preset program to achieve automated operation. In addition, the control module can also process and store these data to provide a basis for subsequent analysis. During actual use, it is necessary to ensure stable air flow and avoid excessive pressure leading to too high gas injection pressure, and a moderate level is sufficient. Before installation, ensure that the gas cylinder has no corrosion, damage or other safety hazards.

[0038] Preferably, the storage battery is installed on the main body of the line inspection trolley to supply power to the drive motor 2, the sensing components, the infrared camera 8, the control module, and the air valve. The line inspection track 1 is an I-beam track. The traveling wheels include a driving traveling wheel 11 and a driven traveling wheel 12. Among them, the driving traveling wheel 11 is connected to the drive motor 2 through a transmission mechanism or directly. The driven traveling wheel 12 is disposed on the opposite side of the driving traveling wheel 11. The driving traveling wheel 11 and the driven traveling wheel 12 can be multiple groups, or one driving traveling wheel 11 and several driven traveling wheels 12, which are respectively installed on the two side track surfaces of the line inspection track 1.

[0039] Preferably, the sensing components include infrared sensors, temperature and humidity sensors, gas detection sensors, partial discharge detection sensors, and smoke sensors; they are installed on the main body of the line patrol car respectively; the infrared cameras 8 are four, two in a group, and are installed on both sides of the main body of the line patrol car respectively, for collecting images of the low-voltage cable areas on both sides. The smoke sensor is mainly used to detect particles suspended in the air, usually smoke generated in the early stage of a fire. Smoke sensors can be applied ion type or photoelectric type. Ion type smoke sensors work by detecting the influence of smoke particles on ion flow; photoelectric type relies on the degree of light beam scattered by smoke particles for detection. Partial discharge detection sensors are used to detect partial discharge phenomena occurring in power equipment, and can be used as an important indicator reference for evaluating the early degradation of electrical insulation systems. Ultra-high frequency (UHF) sensors, radio frequency (RF) sensors, or acoustic emission (AE) sensors can be selected. Infrared sensors detect obstacles and heat sources, and can be used to identify potential hot spots or fire risks. The infrared camera 8 is used to capture high-definition images or videos to help check whether the appearance of the cable is damaged or worn. Thermal imaging cameras can also be installed when necessary to detect different temperature areas, helping to identify overheated components or connection points and predict potential failures. Gas detection sensors monitor gas concentrations in the air, such as oxygen levels, toxic or flammable gases, to ensure a safe environment. Humidity and temperature sensors monitor environmental conditions to help prevent equipment damage caused by high temperature and humidity.

[0040] Preferably, a communication module is also included, the communication module is connected to the control module, and is equipped with a wireless signal transmission antenna and a wireless signal receiving and transmitting unit. The wireless signal transmission antenna can transmit the data signal sent by the control module to the background monitoring terminal through the wireless signal receiving and transmitting unit for data transmission and reception, and can feedback the control module to realize remote data reception or remote control of the line patrol car. The addition of the communication module enables the car to communicate wirelessly with the background monitoring terminal. Through the built-in wireless signal transmission antenna and receiving and transmitting unit, the data collected by the line patrol car can be transmitted to the monitoring center in real time. At the same time, the monitoring center can also remotely issue instructions to realize remote monitoring and control of the line patrol car, which greatly improves the efficiency and response speed of the inspection.

[0041] During operation, the wireless signal transmission antenna receives external inspection instructions and transmits them to the wireless signal receiving and transmitting unit. The wireless signal receiving and transmitting unit transmits the control instructions to the control module for data information processing, and at the same time, after translating the instructions, it sends them to the signal acquisition unit respectively to start signal acquisition. The infrared imaging camera, gas monitoring sensor, etc. detect the temperature of the low-voltage cable and the gas situation in the cable trench according to the instruction requirements. The data information processing unit transmits the signal to the control module, and the control module controls the operation of the drive motor 2 to drive the driving wheels to rotate, and the detection device starts to walk along the track for detection, collecting data, images, videos, temperature and humidity, gas components and other data in each section. When the infrared imaging detection unit detects high temperature of the cable, or the gas signal detection unit detects that the humidity in the cable trench exceeds the standard or there is thick smoke, or the partial discharge detection device detects partial discharge of the cable and a cable fault is found, the signal is transmitted to the signal acquisition unit. The signal acquisition unit synchronously acquires the position information of the equipment control module and sends the collected data to the data information processing unit. The data information processing unit transmits the signal to the wireless signal receiving and transmitting unit, and the wireless signal receiving and transmitting unit transmits the information of the cable fault, including temperature, position, etc. to the administrator terminal through the wireless signal transmission antenna for fault handling.

[0042] Finally, it should be noted that the above has clearly and completely described the concept, specific structure and technical effects generated by the present invention in combination with the embodiments and the drawings to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention. In addition, all the connection and coupling relationships mentioned in the text do not refer to the direct connection of components alone, but refer to the formation of a better coupling structure by adding or reducing coupling accessories according to the specific implementation situation. The various technical features in the present invention can be combined with each other without conflict.

Claims

1. An automatic line inspection device for a low-voltage cable trench, comprising a line inspection trolley main body installed on a line inspection track (1) erected along the inside of the low-voltage cable trench, characterized in that It further includes: An internal through cavity, which is arranged in the middle of the main body of the line patrol vehicle and penetrates through the front and rear thereof, forming a channel-like structure for installing driving wheels; The line patrol track (1) passes through the internal through cavity, and the driving wheels are hung on the track surface of the line patrol track (1); A driving motor (2), which is installed on the outer or inner side of the main body of the line patrol vehicle and is connected to the driving wheels installed in the internal through cavity through a transmission mechanism or directly; A gas cylinder assembly (3), which is installed on the top of the main body of the line patrol vehicle and is connected to a shunt hub (4) installed on the main body of the line patrol vehicle through a main air pipe (10). The intake end of the shunt hub (4) is connected to the main air pipe (10), and the outlet end has several, all of which are installed with independent air valves and are connected to the intake ends of branch air pipes (5); Blowing nozzles (6), there are several of them, and they are all installed on the main body of the line patrol vehicle through nozzle brackets (7). The blowing nozzles (6) are connected to the outlet ends of the branch air pipes (5), and the blowing nozzles (6) are respectively arranged near the sensing components and the infrared camera (8) on the line patrol vehicle and obliquely face the sensing components and the infrared camera (8); A control module, which is used to connect the sensing components and the infrared camera (8) for data acquisition and storage, and is also connected to the air valves to control the timing opening and closing of the air valves.

2. The automatic cable trench patrol device for low-voltage cables according to claim 1, wherein, The gas cylinder assembly (3) is a single gas cylinder filled with compressed air, and it further includes several track cleaning nozzles (9). The track cleaning nozzles (9) are respectively installed at the front and rear ends of the line patrol vehicle, and obliquely face the track surface downward from above the track surface of the line patrol track (1), and are all connected to the shunt hub (4) through their respective branch air pipes (5).

3. The automatic line inspection device for low-voltage cable trenches according to claim 2, wherein A pressure reducing valve is installed at the air outlet of the gas cylinder assembly (3), and is connected to the main air pipe (10) through the pressure reducing valve. The shunt hub (4) is in a manifold shape and has at least two electromagnetic air valves. One is connected to the branch air pipe (5) connected to the track cleaning nozzles (9), and the other is connected to the branch air pipe (5) connected to the blowing nozzles (6); the electromagnetic air valves are connected to the control module.

4. The automatic line inspection device for low-voltage cable trenches according to claim 1, wherein A storage battery is installed on the main body of the line patrol vehicle to supply power to the driving motor (2), the sensing components, the infrared camera (8), the control module, and the air valves; the line patrol track (1) is an I-beam track, and the driving wheels are a driving driving wheel (11) and a driven driving wheel (12). Among them, the driving driving wheel (11) is connected to the driving motor (2) through a transmission mechanism or directly, and the driven driving wheel (12) is arranged on the opposite side of the driving driving wheel (11). The driving driving wheel (11) and the driven driving wheel (12) can be multiple groups, or one driving driving wheel (11) and several driven driving wheels (12), which are respectively installed on the two track surfaces of the line patrol track (1).

5. The automatic line inspection device for low-voltage cable trenches according to claim 4, characterized in that, At least a pair of limiting guide wheels (13) are also installed in the internal through cavity. The limiting guide wheels (13) are horizontally arranged and are respectively installed on the two side walls of the internal through cavity, and respectively contact the vertical surfaces of the I-beam track from both sides of the vertical surface.

6. The automatic line patrol device for low-voltage cable trenches according to claim 1, wherein The sensing components include infrared sensors, temperature and humidity sensors, gas detection sensors, partial discharge detection sensors, and smoke sensors, which are respectively installed on the main body of the line patrol vehicle. The infrared cameras (8) are four, two in each group, which are respectively installed on both sides of the main body of the line patrol vehicle for collecting images of the low-voltage cable areas on both sides.

7. The automatic line inspection device for low-voltage cable trenches according to claim 6, wherein, The gas cylinder assembly (3) also includes a carbon dioxide fire extinguishing gas cylinder (14), which is connected to a release mechanism (15). The release mechanism (15) is installed on the top of the line patrol vehicle body and includes a fire extinguishing control valve connected to the control module. The carbon dioxide gas pipe is connected between the fire extinguishing nozzle (16) and the fire extinguishing control valve. There are at least two fire extinguishing nozzles (16) located on both sides of the line patrol vehicle body, and the spraying range can cover the cable areas on both sides.

8. The automatic line patrol device for low-voltage cable trenches according to claim 1, characterized in that, It also includes a communication module, which is connected to the control module and has a built-in wireless signal transmission antenna and a wireless signal receiving and transmitting unit. The wireless signal transmission antenna can transmit the data signal sent by the control module to the background monitoring terminal through the wireless signal receiving and transmitting unit for data transmission and reception, and can provide feedback to the control module to realize remote data reception or remote control of the line patrol car.

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