A cable fault automatic detection device and apparatus for power transmission and distribution facilities

Abstract

This invention relates to the field of cable testing technology, specifically to an automatic cable fault detection device and equipment for power transmission and transformation facilities. The device includes: a connecting assembly, of which multiple components are evenly arranged along the width of a robotic carriage; each connecting assembly includes: a line end for electrical connection to the conductor core of the cable; and a grounding end that moves synchronously with the robotic carriage and is electrically connected to a connector; the detection device also includes a cable-laying unit mounted on the robotic carriage, wherein a coiled test lead is provided in the cable-laying unit, and both ends of the test lead are electrically connected to the line end and the grounding end, respectively. This invention achieves unmanned and intelligent cable fault detection, significantly improving overall detection efficiency.

Description

Technical Field

[0001] This invention relates to the field of cable testing technology, specifically to an automatic cable fault detection device and equipment for power transmission and transformation facilities. Background Technology

[0002] When testing the electrical properties of a cable, four main parameters are involved: DC resistance, insulation resistance, capacitance, and inductance. Insulation resistance is tested using an insulation resistance tester. The two test terminals of the insulation resistance tester are connected to the cable's conductor and metal sheath, respectively. The insulation layer is located between the conductor and the metal sheath. The insulation resistance is tested by energizing the insulation resistance tester.

[0003] Chinese Patent Publication No. CN118566542B discloses a power detection device for high-altitude operations, including a base mechanism, a detection mechanism fixed to the top of the base mechanism, and a handheld terminal connected to the detection mechanism via a wireless signal. The base mechanism includes a housing with a through hole in the middle, and a blower for movement is fixed inside the through hole. A threaded sleeve is fixed to the bottom of the housing, and a pull rod mechanism is screwed onto the housing through the threaded sleeve. A second cavity is opened inside the top of the housing, and a landing mechanism for lowering is provided inside the second cavity. A lifting mechanism is provided on the housing. The detection mechanism includes two detection clamp assemblies for detecting cables. The two semi-circular detection clamp assemblies form a circular structure. A connecting shaft is fixed to the bottom of the detection clamp assembly, and the end of the connecting shaft is connected to an adjustment unit. The adjustment unit for driving the two detection clamp assemblies is fixed to the top surface of the housing.

[0004] The above-mentioned method is used to inspect cables erected at high altitudes. However, dedicated cable trenches are usually set up near power transmission and transformation facilities. The cables installed in the cable trenches are reserved with a test position for testing at intervals. The traditional testing method requires workers to enter the trench to conduct the test. During the test, one end of the insulation resistance tester is connected to the cable conductor (the cable end usually has an interface reserved for connecting to the cable conductor). Then, the workers connect the test leads of the instrument to the test positions in the cable trench one by one. This method is very labor-intensive, has low testing efficiency, and poses certain safety risks due to the confined working environment and long working time. Summary of the Invention

[0005] To address the aforementioned issues, an automatic cable fault detection device and equipment for power transmission and transformation facilities is provided. By electrically connecting the line end to the cable conductor, adapting the grounding end to the cable test position connector, and coordinating the laying unit with built-in coiled test leads, an autonomous and highly stable cable insulation resistance detection circuit is successfully established. This replaces the traditional manual wiring operation mode for establishing the detection circuit, realizing the automated establishment and disconnection of the detection circuit. It eliminates the need for personnel to enter the cable trench to perform wiring operations, avoiding safety risks such as harmful gases, limited space, and poor visibility faced by manual trench entry.

[0006] To address the problems of the prior art, the present invention provides an automatic cable fault detection device for power transmission and transformation facilities. The detection device can be electrically connected to the connector on the cable test position, and the detection device includes a robotic trolley.

[0007] The detection device also includes:

[0008] A plurality of connecting components are provided and evenly arranged on the robot car along the width direction of the robot car, the connecting components comprising:

[0009] The line end is used for electrical connection with the conductor core in the cable;

[0010] The grounding terminal moves synchronously with the machine trolley and can be electrically connected to the connector.

[0011] The testing device also includes a wire feeding unit mounted on the trolley, wherein a coiled test wire is provided in the wire feeding unit, and the two ends of the test wire are electrically connected to the line end and the grounding end, respectively.

[0012] Preferably, a through groove is formed on the connector along the extension direction of the cable, and conductive plates are provided at the upper and lower parts of the through groove. The grounding terminal includes:

[0013] The mounting base is located below the trolley and moves synchronously with the trolley; the mounting base can slide into the through groove.

[0014] At least two conductive springs are provided and are respectively located on the upper and lower parts of the mounting base. The conductive springs can be electrically connected to the conductive sheet.

[0015] Preferably, the through groove has an inverted "T" shape, and the width of the mounting base is less than the length of the horizontal structure in the through groove.

[0016] Preferably, the test conductor located between the wire-laying unit and the line end is called the laying section, and the straight-line distance from the machine trolley to the line end in the horizontal direction is called the reference length, and the length of the laying section is greater than the reference length.

[0017] Preferably, the wire feeding unit further includes:

[0018] Multiple winding reels are provided, each corresponding to one of the connecting components, and each winding reel is wound with one of the test wires.

[0019] A first rotary driver is used to drive the winding reel to take in and release the wire.

[0020] Preferably, the connection component further includes:

[0021] A pushing device is used to push the mounting base to move along the width direction of the machine trolley;

[0022] A camera is mounted on one side of the mounting base, with the camera's shooting end facing the mounting base.

[0023] Preferably, the connection component further includes:

[0024] A guide rail is provided at the bottom of the machine carriage along the width direction of the machine carriage;

[0025] An extension rod is vertically fixed on the upper part of the mounting base. The extension rod is slidably engaged with the guide rail. The pushing device is directly connected to the extension rod and pushes the extension rod to move.

[0026] Preferably, the front end of the robot is equipped with a visual navigator.

[0027] Preferably, the trolley includes low-pressure tires.

[0028] The present invention also relates to an automatic cable fault detection device for power transmission and transformation facilities, including a remote control and monitoring device and an automatic cable fault detection device for power transmission and transformation facilities.

[0029] The advantages of this invention compared to the prior art are:

[0030] 1. This invention successfully establishes an autonomous and highly stable cable insulation resistance detection circuit by coordinating the electrical connection between the line end and the cable conductor, the adaptive electrical connection between the grounding end and the cable test position connector, and the wire laying unit with built-in coiled test wires. This replaces the traditional manual wiring method for building the detection circuit, realizing automated construction and disconnection of the detection circuit. It eliminates the need for personnel to enter the cable trench to perform wiring operations, avoiding safety risks such as harmful gases, limited space, and poor visibility faced by manual trench entry. At the same time, the simultaneous operation of multiple connecting components enables simultaneous detection of the insulation resistance of multiple cables, reducing detection time and realizing unmanned and intelligent operation of cable fault detection, significantly improving the overall detection efficiency.

[0031] 2. By adapting the grounding end mounting base and the connector's inverted "T"-shaped through-slot structure, and through the elastic contact between the conductive spring and the conductive sheet inside the through-slot, the problem of misalignment caused by slight tilting of the machine trolley during movement and non-perfectly straight cable laying is solved. This achieves adaptive and precise docking between the grounding end and the connector, avoiding jamming and hard collisions during the docking process. At the same time, in conjunction with the position adjustment mechanism composed of the pushing device and the camera, the position of the grounding end can be adjusted in real time according to the actual cable laying direction, compensating for the defects of uneven cable connector spacing, ensuring the continuity and stability of the electrical connection between the grounding end and the connector, and improving the environmental adaptability and operational versatility of the detection device for cable trenches under different laying conditions.

[0032] 3. Through the adaptive wire feeding and take-up control driven by the wire feeding unit servo drive, the precise tracking and positioning of the robot trolley's front-end vision navigator, and the anti-slip and damage-preventing movement design of the low-pressure tires, coupled with the remote control and data monitoring functions of the remote control and monitoring device, the detection device achieves autonomous movement, automatic positioning, synchronous wire feeding and take-up, and remote monitoring of the entire detection process within the cable trench. Among them, the wire feeding unit can adjust the wire feeding rhythm in real time according to the robot trolley's movement speed to avoid the test wires from slackening and causing the line end to slip off the junction box. The vision navigator ensures that the robot trolley accurately tracks along the cable extension direction and is located in the center of the cable arrangement. The low-pressure tires not only prevent damage to the cable during movement but also improve the anti-slip performance of movement within the trench. Attached Figure Description

[0033] Figure 1 This is a partial cross-sectional three-dimensional schematic diagram of an automatic cable fault detection device for power transmission and transformation facilities of the present invention installed in a pipe trench.

[0034] Figure 2 This invention relates to an automatic cable fault detection device for power transmission and transformation facilities. Figure 1 A magnified view of a portion of point A in the middle.

[0035] Figure 3 This is a three-dimensional schematic diagram of an automatic cable fault detection device for power transmission and transformation facilities of the present invention, which is installed in a trench and the cover plate on the top of the trench is removed.

[0036] Figure 4 This is a three-dimensional schematic diagram of an automatic cable fault detection device for power transmission and transformation facilities as it moves along a cable.

[0037] Figure 5 This invention relates to an automatic cable fault detection device for power transmission and transformation facilities. Figure 4 A magnified view of a portion of point B in the middle.

[0038] Figure 6This is a partial cross-sectional three-dimensional schematic diagram of the connection component and the connector in an automatic cable fault detection device for power transmission and transformation facilities according to the present invention.

[0039] Figure 7 This invention relates to an automatic cable fault detection device for power transmission and transformation facilities. Figure 6 A magnified view of a portion of point C.

[0040] Figure 8 This is a partial cross-sectional three-dimensional schematic diagram of an automatic cable fault detection device for power transmission and transformation facilities according to the present invention, when the connecting component is not connected to the connector.

[0041] Figure 9 This invention relates to an automatic cable fault detection device for power transmission and transformation facilities. Figure 8 A magnified view of a portion of point D.

[0042] The diagram is labeled as follows: 1. Robotic trolley; 11. Visual navigator; 12. Low-pressure tire; 2. Connector; 21. Through slot; 3. Connecting assembly; 31. Line end; 32. Grounding end; 321. Mounting base; 322. Conductive spring; 33. Pushing device; 331. Second rotary actuator; 332. Swing rod; 333. Groove; 34. Camera; 35. Guide rail; 36. Extension rod; 4. Wire feeding unit; 41. Test lead; 42. Winding reel; 43. First rotary actuator; 5. Junction box; 51. Connection port; 6. Cable; 7. Pipe trench. Detailed Implementation

[0043] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0044] Reference Figures 1 to 4 and Figure 6 An automatic cable fault detection device for power transmission and transformation facilities, the detection device being electrically connected to the connector 2 on the test position of the cable 6, the detection device including a trolley 1;

[0045] The detection device also includes:

[0046] Connecting components 3, having multiple components evenly arranged along the width direction of the robotic carriage 1, include:

[0047] Line end 31 is used for electrical connection with the conductor core in the cable 6;

[0048] The grounding terminal 32 moves synchronously with the machine trolley 1, and the grounding terminal 32 can be electrically connected to the connector 2;

[0049] The testing device also includes a wire feeding unit 4 mounted on the trolley 1. The wire feeding unit 4 is provided with a coiled test wire 41, and the two ends of the test wire 41 are electrically connected to the line end 31 and the grounding end 32, respectively.

[0050] In the underground cable laying process of the power transmission and transformation system, the cable trench 7 is a core supporting facility to ensure the safe operation of the cable. In accordance with the existing power engineering construction and operation and maintenance technical specifications, in addition to protecting, preventing corrosion and laying the cable in a neat manner, it is also specially designed with supporting test structures for subsequent electrical parameter testing. That is, on the laying path of the cable trench 7, dedicated test positions are reserved at preset intervals, usually ranging from tens to hundreds of meters, depending on the cable specifications, laying length and industry testing standards. A connector 2 is set at the test position. The connector 2 forms a standardized electrical connection node with the conductor and metal sheath of the cable, which is a necessary operating interface for testing core electrical parameters such as insulation resistance. The insulation resistance tester needs to complete the test circuit with the cable body through the test position in order to achieve effective testing of the cable insulation layer.

[0051] Traditional insulation resistance testing of cables within cable trenches relies entirely on manual on-site operation and requires strict adherence to the existing operating procedures of insulation resistance testers. Workers must first enter the cable trench and, in the dimly lit, confined environment, locate the dedicated connection interface for the conductor core at the end of the cable. Using terminals, clamps, and other auxiliary materials, they securely connect one testing end of the insulation resistance tester to the conductor core of the cable, ensuring a tight, secure connection to prevent data distortion due to poor contact. After connecting the conductor core, workers must hold the test lead of the tester and move it along the trench's laying path to each designated test position, precisely aligning the other testing end of the tester with the metal sheath connection at that position. Only after the testing circuit is fully established can the instrument be activated to complete a single insulation resistance test. After completing the test at a single position, the wire must be manually disconnected before moving to the next test position to repeat the connection, testing, and disconnection process.

[0052] This traditional manual trench-entry inspection method has significant operational drawbacks and contradicts the requirements for high efficiency and safety in the current power inspection field. Firstly, the limited space inside cable trenches makes it difficult for workers to maneuver. Furthermore, the linear, continuous distribution of test positions necessitates repeated manual movement, bending over to connect wires, and stooping to disconnect wires, making the process cumbersome and lacking mechanized assistance, significantly increasing the physical workload for on-site personnel. Secondly, cable trenches are mostly enclosed or semi-enclosed spaces with poor ventilation, easily accumulating harmful underground gases and dust. The dim lighting and the presence of water accumulation and debris in some trenches further complicate the process. Prolonged work in this environment not only leads to poor visibility and limited space, resulting in low inspection efficiency and significantly extended inspection time, but also increases the risk of mechanical injuries such as bumps and falls. There are also potential safety risks of poisoning from harmful gases and oxygen deficiency, posing a significant challenge to on-site safety management.

[0053] To avoid the above-mentioned situations, this invention optimizes the design of existing automatic detection devices, enabling autonomous detection of the insulation resistance of cables 6 located in the trench 7 without requiring personnel to enter the entire section for operation, thus reducing safety risks during operation. Furthermore, it allows for simultaneous detection of the insulation resistance of all cables 6 in a single operation, improving detection efficiency. The specific structure and working principle of this invention are as follows:

[0054] The cable 6 laid in the trench 7 includes a conductor, an insulation layer, a metal sheath, and an outer sheath from the inside out. To facilitate later inspection, a connector 2 is installed between two cable segments 6 during cable laying to connect the two cable segments 6. The connector 2 is connected to the metal sheath of the cable 6. A junction box 5 is installed at the end of the trench 7 to connect to the end of the cable 6. The junction box 5 has a wiring port 51 that corresponds to the cable 6. The line end 31 is plugged into the wiring port 51. The conductor of the cable 6 is electrically connected to the line end 31 through the junction box 5.

[0055] During testing, the cable 6 to be tested must be de-energized and discharged. Then, the cover plate on the top of the trench 7 is lifted, and the automatic testing device is placed into the trench 7. The line ends 31 of the automatic testing device are then inserted into the wiring ports 51 of the junction box 5. The trolley 1 then begins to move, and the wire release unit 4 releases the test lead 41 to avoid pulling on the line ends 31 inserted into the wiring ports 51 when the trolley 1 moves. When the trolley 1 moves, it can automatically locate the position of the cable 6 and track the cable 6 according to its extension direction to ensure that the connecting components 3 are aligned with the cable 6. The tracking principle of the trolley 1 will be described below. As the trolley 1 moves, the grounding terminal 32, which moves along with the trolley 1, gradually approaches the connector 2 on the cable 6. Finally, the grounding terminal 32 connects with the connector 2. At this point, the trolley 1 stops moving. All the grounding terminals 32 in the connecting components 3 are now connected to the corresponding connectors 2 on the cable 6. The trolley 1 is then powered on. The grounding terminal 32, the test wire 41, the line terminal 31, the junction box 5, and the cable segment under test 6 form a test circuit, thereby completing the insulation resistance test of the insulation layer.

[0056] Reference Figure 8 and Figure 9 A through groove 21 is provided on the connector 2 along the extension direction of the cable 6. Conductive plates are provided at both the upper and lower parts of the through groove 21. The grounding terminal 32 includes:

[0057] Mounting base 321 is disposed below the machine carriage 1 and moves synchronously with the machine carriage 1. Mounting base 321 can slide into the through groove 21.

[0058] At least two conductive spring contacts 322 are provided and are respectively provided on the upper and lower parts of the mounting base 321. The conductive spring contacts 322 can be electrically connected to the conductive sheet.

[0059] The vertical thickness of the mounting base 321 is less than the vertical dimension of the through groove 21. This means that when the mounting base 321 enters the through groove 21 along with the machine carriage 1, without the conductive springs 322, neither the upper nor lower parts of the mounting base 321 will contact the two conductive pieces on the through groove 21. This design is because the machine carriage 1 is not perfectly horizontal when moving through the trench 7. If the machine carriage 1 is slightly tilted, the mounting base 321 can still smoothly slide into the through groove 21 as the machine carriage 1 passes through it. Due to this issue, to ensure a stable connection between the grounding terminal 32 and the conductive pieces in the through groove 21, conductive springs 322 are provided on both the upper and lower parts of the mounting base 321. The elasticity of the conductive springs 322 ensures a stable connection between the conductive springs 322 and the conductive pieces after the mounting base 321 slides into the through groove 21.

[0060] Reference Figure 2 The through groove 21 has an inverted "T" shape, and the width of the mounting base 321 is less than the length of the horizontal structure in the through groove 21.

[0061] When laying cable 6, it is impossible to guarantee that cable 6 is completely straight. Therefore, the cables 6 laid in the trench 7 are not completely parallel to each other, which causes the connectors 2 set on cable 6 to be not equidistant. In order to improve the matching of connector 2 and grounding terminal 32 and avoid jamming when connector 2 and grounding terminal 32 are connected, the width of mounting base 321 is made smaller than the length of the horizontal structure in the through groove 21. This allows for displacement play between mounting base 321 and through groove 21 in the width direction of trench 7, ensuring that even if there is a slight deviation in the laying direction of cable 6, mounting base 321 can still slide smoothly into through groove 21.

[0062] Reference Figures 1 to 9 The test conductor 41 located between the wire-laying unit 4 and the line end 31 is called the laying section. In the horizontal direction, the straight-line distance from the machine trolley 1 to the line end 31 is called the reference length. The length of the laying section is greater than the reference length.

[0063] As the trolley 1 moves within the trench 7, its body is affected by the bottom of the trench 7. For example, when passing the connector 2, the trolley 1 needs to cross the connector 2, causing slight bumps in the trolley 1. By making the length of the extended section greater than the reference length, it is ensured that the extended section of the test wire 41 is bent when the trolley 1 moves, thus avoiding the situation where the extended section of the test wire 41 is straightened, causing the line end 31 to slip off from the connection port 51 of the junction box 5.

[0064] As a supplement, the vertical distance from the wire feeding unit 4 to the bottom of the trench 7 is called the first length, and the horizontal length from the tail of the machine trolley 1 to the junction box 5 is called the second length (reference length). The length of the feeding section is equal to the sum of the first length and the second length. When the machine trolley 1 moves, the first length remains basically unchanged, while the second length gradually increases. Therefore, the wire feeding unit 4 only needs to adjust the wire feeding speed according to the moving speed of the machine trolley 1.

[0065] Reference Figure 6 and Figure 8 The wire feeding unit 4 further includes:

[0066] Multiple winding reels 42 are provided and correspond one-to-one with the connecting component 3. Each winding reel 42 is wound with one of the test wires 41.

[0067] The first rotary driver 43 is used to drive the winding reel 42 to take in and release the wire.

[0068] When the trolley 1 starts moving from one end of the trench 7, the first rotary driver 43 drives the winding reel 42 to release the test lead 41. When the trolley 1 completes the test and begins to reset, the output shaft of the first rotary driver 43 rotates in the opposite direction, causing the winding reel 42 to retract the released test lead 41, thus preventing the trolley 1 from crushing the released test lead 41 during the reset process. The first rotary driver 43 is preferably a servo motor.

[0069] Reference Figures 5 to 7 The connection component 3 further includes:

[0070] The pushing device 33 is used to push the mounting base 321 to move along the width direction of the trolley 1;

[0071] A camera 34 is disposed on one side of the mounting base 321, with the shooting end of the camera 34 facing the mounting base 321.

[0072] Because the cable 6 cannot be laid perfectly straight and the distance between adjacent cables 6 in different trenches 7 varies, a pushing device 33 and a camera 34 are installed to improve the adaptability of the automatic detection device.

[0073] Since the camera 34 is located on one side of the mounting base 321, it needs to be tilted downwards to capture the mounting base 321. The cable 6 located below the mounting base 321 can also be captured by the camera 34. Thus, the camera 34 can use the cable 6 as a reference to determine whether the mounting base 321 is in the direction of the cable 6's extension. If the mounting base 321 is not in the direction of the cable 6's extension, the pushing device 33 is activated, pushing the mounting base 321 to move along the width of the trolley 1. This ensures that the mounting base 32 can smoothly move into the direction of the cable 6's extension, guaranteeing that the grounding terminal 32 can be successfully connected to the connector 2. When the camera 34 detects that the grounding terminal 32 is successfully connected to the connector 2, the trolley 1 stops moving, ensuring that the insulation resistance detection can proceed normally.

[0074] The pushing device 33 includes a second rotary driver 331, a swing rod 332, and a groove 333. The second rotary driver 331 is mounted on the trolley 1, and the output shaft of the second rotary driver 331 extends vertically through the body of the trolley 1. One end of the swing rod 332 is fixedly mounted on the output end of the second rotary driver 331. The groove 333 is formed on the swing rod 332 along the extension direction of the swing rod 332. An extension rod 36 is provided on the upper part of the mounting base 321. The extension rod 36 extends into the groove 333 and slides in cooperation with the groove 333. A guide rail 35 is provided on one side of the extension rod 36 to limit the movement direction of the extension rod 36. The guide rail 35 is arranged along the width direction of the trolley 1. When the position of the grounding terminal 32 needs to be adjusted, the second rotary driver 331 is activated, and the second rotary driver 331 drives the swing rod 332 to rotate. The swing rod 332 pushes the extension rod 36 through the groove 333. Under the limiting action of the guide rail 35, the extension rod 36 moves along the width direction of the trolley 1, thereby realizing the automatic reset of the grounding terminal 32 to the extension direction of the cable 6.

[0075] Reference Figure 5 and Figure 7 The connection component 3 further includes:

[0076] Guide rail 35 is provided at the bottom of the machine carriage 1 along the width direction of the machine carriage 1;

[0077] An extension rod 36 is vertically fixed on the upper part of the mounting base 321. The extension rod 36 is slidably engaged with the guide rail 35. The pushing device 33 is directly connected to the extension rod 36 and pushes the extension rod 36 to move.

[0078] Reference Figure 6 The front end of the robot 1 is equipped with a visual navigator 11.

[0079] By setting up a visual navigator 11, the robotic carriage 1 can automatically determine the extension direction of the cable 6 and ensure that the robotic carriage 1 is at the center of the cable 6 arranged in the trench 7. For example, when there are 6 cables 6 in the trench 7, the third or fourth cable in the middle is used as a reference. The connecting component 3 set in the middle of the robotic carriage 1 is used to initially position the third or fourth cable 6. The connecting components 3 on both sides of the robotic carriage 1 do not participate in the initial positioning. During the initial positioning, the robotic carriage 1 changes the relative position of the connecting component 3 and the third or fourth cable 6 by adjusting the direction of the carriage. Then, the connecting component 3 uses the camera 34 to accurately position the third or fourth cable 6, thereby ensuring that the robotic carriage 1 is always at the center of the row of cables 6 being detected.

[0080] Reference Figure 6 The machine vehicle 1 includes low-pressure tires 12.

[0081] By setting low-pressure tires 12, the robot trolley 1 can move directly on the cable 6 via the low-pressure tires 12. When the low-pressure tires 12 roll on the cable 6, they will not damage the cable 6 due to their flexibility. At the same time, the contact area between the low-pressure tires 12 and the bottom of the trench 7 is increased, reducing the probability of the robot trolley 1 slipping when moving in the trench 7.

[0082] Reference Figures 1 to 9 The present invention also relates to an automatic cable fault detection device for power transmission and transformation facilities, including a remote control and monitoring device and an automatic cable fault detection device for power transmission and transformation facilities.

[0083] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. An automatic cable fault detection device for power transmission and transformation facilities, the detection device being electrically connected to a connector (2) at a test position of a cable (6), the detection device comprising a trolley (1). Its features are, The detection device also includes: A connecting component (3) is provided, and multiple components are evenly arranged on the machine carriage (1) along the width direction. The connecting component (3) includes: Line end (31) is used for electrical connection with the conductor core in the cable (6); The grounding terminal (32) moves synchronously with the machine trolley (1), and the grounding terminal (32) can be electrically connected to the connector (2); The testing device also includes a wire feeding unit (4) installed on the machine trolley (1), in which a coiled test wire (41) is provided, and the two ends of the test wire (41) are electrically connected to the line end (31) and the ground end (32) respectively. A through groove (21) is provided on the connector (2) along the extension direction of the cable (6). Conductive plates are provided at the upper and lower parts of the through groove (21). The grounding terminal (32) includes: Mounting base (321) is located below the machine carriage (1) and moves synchronously with the machine carriage (1). Mounting base (321) can slide into through groove (21). At least two conductive springs (322) are provided and are respectively provided on the upper and lower parts of the mounting base (321). The conductive springs (322) can be electrically connected to the conductive sheet. The connection component (3) further includes: A pushing device (33) is used to push the mounting base (321) to move along the width direction of the trolley (1); A camera (34) is disposed on one side of the mounting base (321), with the shooting end of the camera (34) facing the mounting base (321). The connection component (3) further includes: The guide rail (35) is arranged at the bottom of the machine carriage (1) along the width direction of the machine carriage (1); An extension rod (36) is vertically fixed on the upper part of the mounting base (321). The extension rod (36) is slidably engaged with the guide rail (35). The pushing device (33) is directly connected to the extension rod (36) and pushes the extension rod (36) to move.

2. The automatic cable fault detection device for power transmission and transformation facilities according to claim 1, characterized in that, The through groove (21) has an inverted "T" shape, and the width of the mounting base (321) is less than the length of the horizontal structure in the through groove (21).

3. The automatic cable fault detection device for power transmission and transformation facilities according to claim 1, characterized in that, The test conductor (41) located between the wire-laying unit (4) and the line end (31) is called the laying section. In the horizontal direction, the straight distance from the machine trolley (1) to the line end (31) is called the reference length. The length of the laying section is greater than the reference length.

4. The automatic cable fault detection device for power transmission and transformation facilities according to claim 3, characterized in that, The wire feeding unit (4) also includes: Multiple winding reels (42) are provided and correspond one-to-one with the connecting components (3). Each winding reel (42) is wound with one of the test wires (41). The first rotary driver (43) is used to drive the winding reel (42) to take in and release the wire.

5. An automatic cable fault detection device for power transmission and transformation facilities according to claim 1, characterized in that, The front end of the robot (1) is equipped with a visual navigator (11).

6. The automatic cable fault detection device for power transmission and transformation facilities according to claim 1, characterized in that, The robot (1) includes low-pressure tires (12).

7. An automatic cable fault detection device for power transmission and transformation facilities, characterized in that, It includes a remote control and monitoring device and an automatic cable fault detection device for power transmission and transformation facilities as described in any one of claims 1-6.

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