Portable low-voltage cable fault hidden danger accurate positioning device

Abstract

The invention provides a portable low-voltage cable fault hidden danger accurate positioning device, and relates to the technical field of power equipment detection, the portable low-voltage cable fault hidden danger accurate positioning device comprises a detector, the detector is connected with two groups of wires, and the other end of each group of wires is connected with a probe; the device further comprises an auxiliary detection mechanism, the auxiliary detection mechanism comprises a U-shaped clamp, two sets of connecting rods are arranged on the left side wall and the right side wall of the U-shaped clamp, and a pedal is connected to the other side wall of the U-shaped clamp. Two groups of quick release mechanisms are further included, each quick release mechanism comprises a fixing cylinder, the fixing cylinders are fixedly connected with the side walls of the connecting rods, a plurality of groups of first inclined surface grooves are formed in the fixing cylinders, a plurality of groups of second inclined surface grooves are correspondingly formed in the fixing cylinders, and dodecagonal rods are slidably connected in the fixing cylinders; according to the device, the auxiliary detection mechanism is designed to be matched with the rapid disassembly and assembly mechanism, so that the optimization of rapid installation and fixation, labor-saving insertion, accurate positioning and convenient disassembly of the probe is realized, and the efficiency and quality of low-voltage cable fault hidden danger troubleshooting work are improved.

Description

Technical Field

[0001] This invention relates to the field of power equipment testing technology, and more specifically, to a portable device for accurately locating potential faults in low-voltage cables. Background Technology

[0002] In current engineering practice for fault location and troubleshooting of low-voltage cable lines, the step voltage method is a traditional and widely used cable fault location technique. Its basic principle is to apply a specific test signal to the cable and utilize the potential distribution characteristics formed by the leakage current at the fault point in the soil. A dual-probe method is used to measure the potential difference changes on the soil surface point by point along the cable path. The specific location of the fault point is determined based on abnormal fluctuations in the potential gradient. This method is applicable to situations where cables are buried, the fault point is unclear, and direct observation is not possible. It is particularly effective for detecting grounding faults caused by cable insulation breakdown or sheath damage. However, in practical applications, the step voltage method relies heavily on manual operation and experience-based judgment by on-site personnel. The entire testing process requires personnel to carry testing instruments and probe assemblies along the cable laying path. The process involves checking each section segment by segment. At each test point, two sets of metal probes need to be manually inserted into the soil at specified intervals. The probes must be inserted to a sufficient depth to make full contact with the soil and obtain a stable and reliable potential signal. After completing the measurement at one point, the probes need to be pulled out of the soil and then moved to the next test point to repeat the same insertion operation. This repetitive manual insertion and removal not only makes the testing work extremely tedious and time-consuming, but also consumes a lot of the staff's physical strength. Especially when the cable line is long and the location of the fault is unclear, requiring a large-scale investigation, the staff may need to set up dozens or even hundreds of test points within a line range of hundreds of meters or even longer. At each point, a series of operations such as probe insertion, measurement, removal, and movement must be completed. The entire testing process may last for several hours or even a whole day, highlighting the problems of high workload and low efficiency.

[0003] More importantly, the manual insertion of probes is subject to numerous objective constraints and influences. Differences in soil properties, surface hardness, distribution of gravel and debris, and obstruction from vegetation roots can all make probe insertion difficult. In areas with hard soil and high stone content, workers often need to exert considerable force to insert the probe to the predetermined depth, sometimes even failing to insert it and having to change the test point. In soft, moist soil, although the probe is easier to insert, its stability is poor, and it is prone to tilting or loosening, affecting measurement accuracy. In addition, the randomness and non-standardization of manual operation are also important factors affecting the quality of testing. Different workers have different operating habits, force control, and depth judgment. Even the same worker may experience a decline in operation quality due to fatigue after repeated operations for a long time. Problems such as inconsistent probe insertion depth, large deviations in the distance between two probes, and poor contact between the probe and the soil occur frequently. These non-standard operations directly affect the accuracy and comparability of measurement data, significantly reducing the accuracy of fault location. Summary of the Invention

[0004] (a) Technical problems to be solved To address the problems existing in the prior art, the present invention provides a portable device for accurately locating potential faults in low-voltage cables, thereby solving the technical problems mentioned in the background art.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: A portable device for accurately locating potential low-voltage cable faults includes a detector connected to two sets of wires, each set of wires having a probe connected to its other end; an auxiliary detection mechanism including a U-shaped clamp with two sets of connecting rods on its left and right side walls and a pedal connected to its other side wall; and a quick-release mechanism with two sets, including a fixed cylinder fixedly connected to the side wall of the connecting rods. The fixed cylinder has multiple sets of first inclined grooves and correspondingly multiple sets of second inclined grooves. A twelve-sided rod is slidably connected inside the fixed cylinder.

[0006] Preferably, the inner wall of the U-shaped clamp is provided with a first protrusion, the surface of the first protrusion is provided with multiple sets of friction strips, and the other end of the U-shaped clamp is provided with a second protrusion corresponding to the first protrusion.

[0007] Preferably, the inner wall of the U-shaped clamp is provided with a sliding groove, the sliding groove is located between the first protrusion and the second protrusion, a rotating clamp is rotatably connected inside the U-shaped clamp, and the outer wall of the rotating clamp is provided with a sliding strip adapted to the sliding groove, the sliding strip being embedded in the sliding groove.

[0008] Preferably, the upper end face of the rotating clamp is provided with two sets of connecting rods, and the other end of the connecting rod is connected to a rotating ring.

[0009] Preferably, the rotating clamp has a rotating groove on its side wall, a middle tube is rotatably connected in the rotating groove, the middle tube has multiple sets of semi-circular grooves on its outer side wall, and the middle tube has multiple sets of arc-shaped springs on its outer side wall.

[0010] Preferably, a rubber sleeve is coaxially fitted on the outer side of the intermediate tube, and the other end of the arc spring is fixedly connected to the inner wall of the rubber sleeve. The inner wall of the rubber sleeve is provided with four sets of adjustment grooves, and an adjustment plate adapted to the semi-circular groove is slidably connected in the adjustment groove.

[0011] Preferably, a support rod is connected to one side wall of the dodecagonal bar, and a pull rod is connected to the other side wall of the support rod.

[0012] Preferably, a slider is slidably connected in the first inclined groove, one end of the slider is connected to a threaded plate, the threaded plate is slidably connected to the corresponding second inclined groove, the number of sliders corresponds to the twelve-sided rod, and the sidewall of the slider abuts against the sidewall of the twelve-sided rod.

[0013] Preferably, a rotating cylinder is rotatably connected inside the fixed cylinder, an adjusting ring is connected to one end of the rotating cylinder, and a tapered threaded sleeve is connected to the other end of the rotating cylinder. The tapered threaded sleeve is adapted to multiple sets of threaded plates, and an intermediate ring is rotatably connected inside the rotating cylinder. The intermediate ring is sleeved on the outside of the twelve-sided rod.

[0014] Preferably, the outer side wall of the rotating cylinder is provided with a first limiting ring, and the inner side wall of the fixed cylinder is provided with a second limiting ring, wherein the first limiting ring and the second limiting ring rotate and abut against each other.

[0015] (III) Beneficial Effects Compared with existing technologies, this invention provides a portable device for accurately locating potential low-voltage cable faults, which has the following advantages: This portable device for accurately locating potential low-voltage cable faults solves the problems of cumbersome probe insertion, high labor intensity, poor positioning accuracy, and inconvenience in carrying the device in traditional step voltage detection technology by designing an auxiliary detection mechanism in conjunction with a quick disassembly mechanism. It achieves optimization of quick probe installation and fixation, labor-saving insertion, accurate positioning, and convenient disassembly, thereby improving the efficiency and quality of low-voltage cable fault hazard investigation.

[0016] The auxiliary detection mechanism employs a rotating clamp combined with a rubber sleeve and arc springs for elastic clamping, enabling rapid probe installation and reliable fixation. Operators simply rotate the rotating ring to align the opening of the rotating clamp with the opening of the U-shaped clamp, place the probe into the rotating clamp, and then rotate the ring another 180 degrees to engage the first and second protrusions to complete the probe installation and fixation. Multiple sets of arc springs connected to the inner side of the rubber sleeve form a flexible clamping system with radial elasticity. When the probe is placed in the rotating clamp and rotated into position, the rubber sleeve contracts inward under the action of the first and second protrusions, forming a tight annular grip with the probe's sidewall. The arc springs undergo elastic deformation during compression, storing elastic potential energy and applying a continuous and uniform radial clamping force to the probe. The soft material of the rubber sleeve also provides cushioning protection, preventing scratches or wear that the metal clamping mechanism might cause to the probe surface, thus extending the probe's service life. The slidingly connected adjusting plate within the adjusting groove and the semi-circular groove on the outer wall of the intermediate tube constitute a position locking mechanism. Once the rubber sleeve has retracted to its proper position, the adjusting plate, pushed by the arc spring, embeds itself into the corresponding semi-circular groove. This mechanical locking mechanism locks the retracted state of the rubber sleeve in place, preventing the probe from loosening or falling off due to vibration or stress during subsequent use. This dual fixing mechanism, combining elastic clamping and mechanical locking, ensures the reliability and stability of the probe installation. Multiple friction strips on the surface of the first protrusion form multi-point frictional contact with the probe's sidewall, increasing the friction between the probe and the fixing mechanism. When the probe encounters axial resistance during soil insertion, the friction strips effectively prevent axial slippage relative to the rotating clamp, ensuring the accuracy of the probe insertion depth. By replacing adjusting plates of different thicknesses, the degree of rubber sleeve retraction can be adjusted, allowing the device to accommodate probes of various sizes, from small to large diameters. One device can meet the needs of different testing scenarios, avoiding the need for different fixing clamps for different probe sizes in traditional methods, thus reducing the configuration cost and carrying burden of the device.

[0017] The lever structure design of the pedal and U-clamp achieves effortless operation and stable control during probe insertion. After the operator holds the two sets of handles and aligns the probe with the desired insertion position, they can insert the probe by stepping on the pedal. This foot-operated method fully utilizes the strength of the lower limbs, and frees the hands to focus on directional control and stable gripping of the device, improving operational accuracy and safety. The U-clamp serves as the main frame of the lever mechanism, the pedal connection point serves as the power input point, and the probe's fixed position serves as the force application point. Through a reasonable lever arm length design, a force amplification effect is achieved. The force applied by the operator to the pedal is transmitted and amplified by the lever mechanism and then acts on the probe, enabling the probe to overcome soil resistance and smoothly insert to the predetermined depth with a large thrust. The device is designed with a self-locking anti-slip mechanism to cope with the complex force conditions during probe insertion. When the operator steps on the pedal downwards, due to the hinge position between the pedal and the U-clamp, and the connection between the probe and the U-clamp... Due to their relative positions, the probe is subjected not only to a downward axial thrust but also to a horizontal lateral force. This lateral force component causes the probe to tend to compress towards the first and second protrusions within the rotating clamp. Consequently, the radial clamping force of the rubber sleeve on the probe increases, and the contact pressure between the friction strip on the surface of the first protrusion and the sidewall of the probe also increases synchronously, enhancing friction. This self-locking characteristic, where the greater the force, the tighter the clamping, ensures that the probe remains stable and fixed during insertion, preventing slippage or wobbling within the clamping mechanism due to soil resistance. This effectively guarantees the accuracy of the insertion depth and the perpendicularity of the insertion direction. After the test is completed, the operator holds the pull rod and pulls upwards. The pulling force applied by the pull rod overcomes the friction between the soil and the probe, pulling the probe out of the soil. The pull rod provides a stable and reliable point of force for the operator, avoiding loosening or damage to the connection that may be caused by directly pulling the probe or wire. This foot-operated insertion and hand-operated extraction mode conforms to ergonomic principles, saving effort and increasing efficiency.

[0018] The quick-assembly and disassembly mechanism, through a tapered threaded sleeve driving multiple sets of threaded plates in conjunction with sliders to move radially along the inclined groove, enables rapid installation and disassembly of the handrail. This resolves the inherent contradiction between portability and stability in traditional portable testing devices. Before testing begins, the operator inserts the twelve-sided rod connected to the handrail into the fixed cylinder and manually rotates the adjusting ring to drive the rotating cylinder and tapered threaded sleeve to rotate synchronously. The tapered outer surface of the tapered threaded sleeve is threadedly connected to multiple sets of threaded plates. When the tapered threaded sleeve rotates in the locking direction, its tapered design causes the threaded plates to not only rotate around their axis during rotation but also be forced to move radially inward. The threaded plates, through a mechanical connection, drive the corresponding sliders along the first inclined groove towards the smaller diameter... The sliding mechanism at one end, along with the inclined angle design of the first inclined groove, enables the conversion from circumferential rotation to radial movement. Multiple sliders gradually converge from their initial loose distribution on the inner wall of the fixed cylinder towards the central dodecagonal rod until the inner surfaces of all sliders and the outer surface of the dodecagonal rod form a tight, multi-point distributed clamping state. The clamping force is evenly transmitted to the dodecagonal rod through multiple evenly distributed contact points in the circumferential direction, ensuring a stable and reliable connection between the handrail and the fixed cylinder. The dodecagonal rod features a dodecagonal cross-section design, which offers better anti-rotation capabilities compared to a circular cross-section. Once the sliders are clamped to the side wall of the dodecagonal rod, the rod is effectively locked and cannot rotate around its axis, preventing the handrail from rotating due to stress during use. In operation, the intermediate ring is fitted outside the twelve-sided rod and rotates relative to the rotating cylinder, effectively isolating the rotational movement of the rotating cylinder from the inserted twelve-sided rod. This ensures that the twelve-sided rod remains stable during the rotational locking process and will not rotate with the rotating cylinder, thus preventing locking failure or positioning deviation of the twelve-sided rod. The rotational abutment design of the first and second limiting rings restricts the axial movement of the rotating cylinder, ensuring that the rotating cylinder can only rotate around its axis and cannot move axially. This guarantees a stable thread engagement between the tapered threaded sleeve and the threaded plate. The entire installation process can be completed by manually rotating the adjusting ring. After the inspection is completed, the operator rotates the adjusting ring in the opposite direction, causing the tapered threaded sleeve to rotate in the opposite direction, driving the screw... The textured plate drives the slider to slide along the first inclined groove towards the larger diameter end. The clamping force between the slider and the twelve-sided rod disappears, and the twelve-sided rod can be easily pulled out to complete the disassembly of the handle. The two sets of handles that are disassembled can be stored separately from the main device, which is suitable for mobile testing operations that need to be frequently moved between multiple testing sites. The quick-release mechanism design also makes the device highly adjustable. Operators can change the handles of different lengths according to their own height and operating habits, so that the height of the handle matches the height of the operator. This ensures that the body posture is comfortable and the force is reasonable when inserting the probe, avoiding inconvenience or physical fatigue caused by unsuitable handle height, and improving the applicability and operating comfort of the device.

[0019] In summary, this portable, precise location device for low-voltage cable faults solves the problems of difficult probe insertion, cumbersome operation, low spacing accuracy, and inconvenient portability in traditional step voltage detection technology by using the elastic adaptive clamping, self-locking anti-slip, and foot-operated effortless design of the auxiliary detection mechanism, along with the tool-based installation and split storage function of the quick-assembly and disassembly mechanism. It provides a convenient, portable, and highly applicable tool for low-voltage cable fault hazard investigation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a portable low-voltage cable fault hazard precise positioning device according to the present invention; Figure 2 This is a schematic diagram of the detector and wire structure in this invention; Figure 3 This is a schematic diagram of the structure of the handrail and U-shaped clamp in this invention; Figure 4 This is a schematic diagram of the structure of the U-shaped clamp and the rotating clamp in this invention; Figure 5 This is a cross-sectional view of the U-shaped clamp in this invention; Figure 6 This is a schematic diagram of the structure of the rotating ring and the rotating clamp in this invention; Figure 7 This is a schematic diagram of the structure of the rubber sleeve and the intermediate tube in this invention; Figure 8 In this invention Figure 7 A schematic diagram of the cross-sectional structure; Figure 9 This is a schematic diagram of the quick-release mechanism in this invention; Figure 10 In this invention Figure 9 A schematic diagram of the cross-sectional structure; Figure 11 In this invention Figure 9 A schematic diagram of the exploded structure; Figure 12 This is a schematic diagram of the structure of the adjusting ring and the rotating cylinder in this invention.

[0021] In the diagram: 11. Detector; 12. Wire; 13. Probe; 14. Handrail; 15. Pull rod; 21. U-shaped clamp; 22. Connecting rod; 23. Pedal; 24. First protrusion; 25. Friction strip; 26. Second protrusion; 27. Slide groove; 28. Rotating clamp; 29. ​​Slide bar; 31. Fixed cylinder; 32. First inclined groove; 33. Second inclined groove; 34. Dodecagonal rod; 35. Slider; 36. Threaded plate; 37. Rotating cylinder; 38. Adjusting ring; 39. Tapered threaded sleeve; 210. Connecting rod; 211. Rotating ring; 212. Rotating groove; 213. Intermediate tube; 214. Semicircular groove; 215. Arc spring; 216. Rubber sleeve; 217. Adjusting groove; 218. Adjusting plate; 310. Intermediate ring; 311. First limiting ring; 312. Second limiting ring. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0024] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0025] Please see Figures 1-12A portable, precise location device for low-voltage cable fault hazards includes a detector 11 connected to two sets of wires 12, each set of wires 12 having a probe 13 connected to its other end. It also includes an auxiliary detection mechanism comprising a U-shaped clamp 21. Two sets of connecting rods 22 are provided on the left and right side walls of the U-shaped clamp 21. A pedal 23 is connected to the other side wall of the U-shaped clamp 21. A first protrusion 24 is provided on the inner side wall of the U-shaped clamp 21, with multiple friction strips 25 on its surface. A second protrusion 26 corresponding to the first protrusion 24 is provided at the other end of the U-shaped clamp 21. A sliding groove 27 is formed on the inner side wall of the U-shaped clamp 21, located between the first protrusion 24 and the second protrusion 26. A rotating clamp 28 is rotatably connected inside the U-shaped clamp 21. The outer wall of the movable clamp 28 is provided with a slide bar 29 that is adapted to the slide groove 27. The slide bar 29 is embedded in the slide groove 27. The upper end face of the rotating clamp 28 is provided with two sets of connecting rods 210. The other end of the connecting rods 210 is connected to a rotating ring 211. The side wall of the rotating clamp 28 is provided with a rotating groove 212. The rotating groove 212 is rotatably connected to a middle tube 213. The outer wall of the middle tube 213 is provided with multiple sets of semi-circular grooves 214. The outer wall of the middle tube 213 is provided with multiple sets of arc springs 215. The outer side of the middle tube 213 is coaxially fitted with a rubber sleeve 216. The other end of the arc spring 215 is fixedly connected to the inner side wall of the rubber sleeve 216. The inner side wall of the rubber sleeve 216 is provided with four sets of adjusting grooves 217. The adjusting grooves 217 are slidably connected with adjusting plates 218 that are adapted to the semi-circular grooves 214. It also includes a quick-release mechanism, which has two sets, including a fixed cylinder 31, which is fixedly connected to the side wall of the connecting rod 22. Multiple sets of first inclined grooves 32 and corresponding sets of second inclined grooves 33 are formed inside the fixed cylinder 31. A dodecagonal rod 34 is slidably connected inside the fixed cylinder 31. A support rod 14 is connected to the side wall of the dodecagonal rod 34, and a pull rod 15 is connected to the other side wall of the support rod 14. A slider 35 is slidably connected inside the first inclined groove 32. One end of the slider 35 is connected to a threaded plate 36, which is slidably connected to the corresponding second inclined groove 33. The number of sliders 35 is the same as that of the dodecagonal rod. Corresponding to 34, the side wall of slider 35 abuts against the side wall of dodecagonal rod 34. A rotating cylinder 37 is rotatably connected inside the fixed cylinder 31. One end of the rotating cylinder 37 is connected to an adjusting ring 38, and the other end of the rotating cylinder 37 is connected to a tapered threaded sleeve 39. The tapered threaded sleeve 39 is adapted to multiple sets of threaded plates 36. An intermediate ring 310 is rotatably connected inside the rotating cylinder 37. The intermediate ring 310 is sleeved on the outside of the dodecagonal rod 34. A first limiting ring 311 is provided on the outer wall of the rotating cylinder 37, and a second limiting ring 312 is provided on the inner wall of the fixed cylinder 31. The first limiting ring 311 and the second limiting ring 312 rotatably abut against each other.

[0026] In this invention, workers can quickly insert probes 13 into the soil using an auxiliary detection mechanism, improving work efficiency and reducing labor intensity. Specifically, workers first need to rotate the rotating ring 211 to turn the open end of the rotating clamp 28 to the open end of the U-shaped clamp 21. The slide bar 29 rotates along the slide groove 27. Then, a set of probes 13 is placed into the rotating clamp 28. The side wall of the rubber sleeve 216 abuts against the side wall of the probe 13, and the side wall of the probe 13 abuts against the side walls of the first protrusion 24 and the second protrusion 26. Multiple friction strips 25 provided on the side wall of the first protrusion 24 abut tightly against the side wall of the probe 13. Workers then rotate the rotating ring 211 again, which drives the rotating clamp 28 to rotate 180 degrees through the connecting rod 210 so that the open end of the rotating clamp 28 faces the inside of the U-shaped clamp 21. At this time, under the action of the first protrusion 24 and the second protrusion 26, the rubber sleeve 216 abuts tightly against the side wall of the probe 13. The arc spring 215 inside the rubber sleeve 216 is compressed and deformed until the adjusting plate 218 is engaged. Within the semi-circular groove 214, a set of probes 13 is fixed. Then, the worker holds the two sets of handles 14 and aligns the probes 13 with the position to be inserted into the soil. The worker steps on the pedal 23 and pushes the probes 13 into the soil. When the worker steps down on the pedal 23, the probes 13 are subjected to not only a vertical downward force but also a horizontal force. At this time, under the action of the first protrusion 24, the second protrusion 26, and the rubber sleeve 216, the probes 13 will self-lock, thus allowing the probes 13 to be smoothly inserted into the preset detection position. After the detection is completed, the worker holds the pull rod 15 and pulls it upward to remove the probes 13. Then, the worker manually rotates the rotating ring 211 again so that the open end of the rotating ring 211 is aligned with the open end of the U-shaped clamp 21, and the probes 13 can be removed. The adjusting plate 218, which is slidably connected inside the rubber sleeve 216, can be replaced. By replacing the adjusting plate 218, the distance between the adjusting plate 218 and the semi-circular groove 214 can be adjusted, thereby adapting to probes 13 of different sizes. For ease of storage and transportation, the handrail 14 can be quickly assembled and disassembled. Specifically, before the testing begins, both sets of handrails 14 need to be installed. The operator inserts the dodecagonal rod 34 connected to the handrail 14 into the fixed cylinder 31, and then manually rotates the adjusting ring 38. The adjusting ring 38 drives the rotating cylinder 37 and the tapered threaded sleeve 39 to rotate synchronously. The intermediate ring 310 rotates relative to the rotating cylinder 37. The design of the intermediate ring 310 effectively prevents the rotation of the rotating cylinder 37 from affecting the inserted dodecagonal rod 34. The rotation of the tapered threaded sleeve 39 drives multiple sets of threaded plates 36 connected to it to slide along the second inclined groove 33. The threaded plates 36 drive the corresponding slider 35 to slide along the first inclined groove 32 towards the end with the smaller diameter of the first inclined groove 32, so that the slider 35 is sideways. The wall is tightly abutted against the side wall of the dodecagonal rod 34, thereby fixing the dodecagonal rod 34. After the two sets of support rods 14 are installed in sequence, the testing work can be carried out. After the testing work is completed, the support rods 14 can be disassembled for subsequent transportation. The staff needs to rotate the adjusting ring 38 in the opposite direction, which in turn drives the tapered threaded sleeve 39 to rotate in the opposite direction through the rotating cylinder 37. This drives the threaded plate 36 connected to it to drive the corresponding slider 35 to slide along the first inclined groove 32 towards the end with the larger diameter of the first inclined groove 32, so that the slider 35 is released from the state of tight abutment with the side wall of the dodecagonal rod 34. Then the dodecagonal rod 34 can be pulled out, and the support rods 14 can be removed. The staff can also change the length of the support rods 14 to adapt to their own height for subsequent testing work.

[0027] In all the solutions mentioned above, for connections between two components, welding, bolt and nut connection, bolt or screw connection, or other known connection methods can be selected according to the actual situation. They will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. In all the solutions mentioned above, those involving the operation of electrical components, unless otherwise specified, are controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and circuit connections are existing, well-known, and mature technologies, and their electrical connection relationships and specific circuit structures will not be elaborated here. Of all the solutions mentioned above, those involving motors can be combined with reducers if necessary. The connection structure and working principle between the motor and the reducer are existing known technologies and will not be elaborated upon in this invention. Of all the solutions mentioned above, those involving the connection between solar panels and batteries can be equipped with essential accessories such as inverters, battery charging controllers, cables, fuses, and brackets. Their control principles and circuit connections are all existing, well-known, and mature technologies, so their electrical connection relationships and specific circuit structures will not be elaborated here.

Claims

1. A portable device for accurately locating potential low-voltage cable faults, comprising a detector (11), characterized in that: The detector (11) is connected to two sets of wires (12), and the other end of each set of wires (12) is connected to a probe (13); it also includes an auxiliary detection mechanism, which includes a U-shaped clamp (21), and two sets of connecting rods (22) are provided on the left and right side walls of the U-shaped clamp (21), and a pedal (23) is connected to the other side wall of the U-shaped clamp (21); it also includes a quick-release mechanism, which has two sets, including a fixed cylinder (31), which is fixedly connected to the side wall of the connecting rod (22), and multiple sets of first inclined grooves (32) are opened in the fixed cylinder (31), and multiple sets of second inclined grooves (33) are also opened accordingly. A twelve-sided rod (34) is slidably connected in the fixed cylinder (31).

2. The portable low-voltage cable fault hazard positioning device according to claim 1, characterized in that: The inner wall of the U-shaped clamp (21) is provided with a first protrusion (24), and the surface of the first protrusion (24) is provided with multiple sets of friction strips (25). The other end of the U-shaped clamp (21) is provided with a second protrusion (26) corresponding to the first protrusion (24).

3. The portable low-voltage cable fault hazard precise positioning device according to claim 2, characterized in that: The inner wall of the U-shaped clamp (21) is provided with a sliding groove (27), which is located between the first protrusion (24) and the second protrusion (26). A rotating clamp (28) is rotatably connected inside the U-shaped clamp (21). The outer wall of the rotating clamp (28) is provided with a sliding strip (29) that is adapted to the sliding groove (27), and the sliding strip (29) is embedded in the sliding groove (27).

4. The portable low-voltage cable fault hazard positioning device according to claim 3, characterized in that: The upper end face of the rotating clamp (28) is provided with two sets of connecting rods (210), and the other end of the connecting rod (210) is connected to a rotating ring (211).

5. The portable low-voltage cable fault hazard precise positioning device according to claim 4, characterized in that: The rotating clamp (28) has a rotating groove (212) on its side wall. A middle tube (213) is rotatably connected in the rotating groove (212). The middle tube (213) has multiple sets of semi-circular grooves (214) on its outer side wall. The middle tube (213) has multiple sets of arc springs (215) on its outer side wall.

6. The portable low-voltage cable fault hazard precise positioning device according to claim 5, characterized in that: A rubber sleeve (216) is coaxially fitted on the outside of the intermediate tube (213). The other end of the arc spring (215) is fixedly connected to the inner wall of the rubber sleeve (216). Four sets of adjustment grooves (217) are opened on the inner wall of the rubber sleeve (216). An adjustment plate (218) adapted to the semi-circular groove (214) is slidably connected in the adjustment groove (217).

7. The portable low-voltage cable fault hazard positioning device according to claim 1, characterized in that: The side wall of the dodecagonal bar (34) is connected to a support bar (14), and the other side wall of the support bar (14) is connected to a pull bar (15).

8. The portable low-voltage cable fault hazard precise positioning device according to claim 7, characterized in that: A slider (35) is slidably connected in the first inclined groove (32). One end of the slider (35) is connected to a threaded plate (36). The threaded plate (36) is slidably connected to the corresponding second inclined groove (33). The number of sliders (35) corresponds to the number of twelve-sided rods (34). The sidewall of the slider (35) abuts against the sidewall of the twelve-sided rod (34).

9. A portable, precise location device for potential low-voltage cable faults according to claim 8, characterized in that: A rotating cylinder (37) is rotatably connected inside the fixed cylinder (31). An adjusting ring (38) is connected to one end of the rotating cylinder (37), and a tapered threaded sleeve (39) is connected to the other end of the rotating cylinder (37). The tapered threaded sleeve (39) is adapted to multiple sets of threaded plates (36). An intermediate ring (310) is rotatably connected inside the rotating cylinder (37), and the intermediate ring (310) is sleeved on the outside of the twelve-sided rod (34).

10. A portable, precise location device for potential low-voltage cable faults according to claim 9, characterized in that: The outer side wall of the rotating cylinder (37) is provided with a first limiting ring (311), and the inner side wall of the fixed cylinder (31) is provided with a second limiting ring (312). The first limiting ring (311) and the second limiting ring (312) rotate and abut against each other.

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