Leakage current monitoring device for assembled power distribution system

Abstract

The invention provides an assembled power distribution system leakage current monitoring device which comprises a supporting base, a separable adjusting assembly is assembled in one side of the supporting base, an equipment integration box body is fixedly installed at the top of the adjusting assembly, a liftable lifting assembly is assembled on one side of the interior of the equipment integration box body, and the lifting assembly is fixedly installed on the other side of the interior of the equipment integration box body. A detachable electric leakage monitoring assembly is fixedly installed on the top of the lifting assembly, a wire sleeving assembly is assembled on one side of the lifting assembly, and a cable testing assembly is assembled on the lifting assembly on one side of the electric leakage monitoring assembly. The arc-shaped folding blocks are driven by the screw to move oppositely, a cable is gently folded and accurately guided to the center position right in front of the monitoring head, and by controlling the meshing state of the magnetic coupling, when a flapping test mode is switched, the transmission wheel is driven by power to rotate, the insulated flapping head is driven to flap the cable at a constant frequency, external disturbance is simulated, and the cable flapping test efficiency is improved. Hidden mechanical faults such as cable joint loosening and poor contact can be effectively diagnosed, and monitoring comprehensiveness is improved.

Description

Technical Field

[0001] This invention relates to the field of power distribution system technology, and more specifically to a modular power distribution system leakage current monitoring device. Background Technology

[0002] In power system operation and maintenance, leakage current and short-circuit faults in distribution lines are core safety hazards that can cause electrical fires and equipment damage, seriously threatening power supply reliability and the safety of personnel and property. Especially in urban distribution networks and industrial parks, where lines are densely distributed and some cables are erected at high altitudes, real-time monitoring of leakage current and rapid fault location have become crucial for ensuring power supply safety. With the intelligent upgrading of distribution networks, operation and maintenance work places higher demands on the operational flexibility, monitoring efficiency, and safety performance of leakage current monitoring devices. However, current mainstream monitoring equipment still suffers from numerous technical bottlenecks, making it difficult to adapt to diverse operation and maintenance needs.

[0003] The core pain point of existing leakage current monitoring devices is their poor adaptability to different operating scenarios, which is particularly prominent in monitoring scenarios with multiple cables. Traditional monitoring equipment is mainly fixed-installation type. These devices require pre-wiring and fixed installation, can only monitor preset areas, and cannot be flexibly moved to monitor temporary fault points. Moreover, the maintenance cost of these devices is high, making it difficult to adapt to dynamically changing operation and maintenance needs. In addition, when monitoring high-altitude cables, existing monitoring devices have difficulty accurately guiding the monitoring head to the center when locating multiple or loose cables, affecting monitoring accuracy.

[0004] Currently, to address the issues of portability, efficiency, stability, monitoring accuracy, and operational safety in power distribution system leakage current monitoring devices, existing patent CN114955952A discloses an online safety monitoring device for power transmission and distribution. This device includes a support frame and a maintenance frame. The maintenance frame has openings, and a maintenance roller is rotatably connected inside the frame. A drive motor for rotating the maintenance roller is mounted on the frame. The maintenance roller is mounted on the power transmission cable, and a camera is also installed inside the frame. The purpose is to perform real-time, close-range online monitoring and inspection of the power transmission cable based on images captured by the camera, thereby improving the monitoring and inspection effectiveness of the power transmission cable.

[0005] However, there are significant positioning defects in guiding the power transmission cable to the center of the monitoring head (camera). Specifically, the entire inspection frame is pushed horizontally towards the cable by the first electric push rod, relying on the rough alignment of the opening and the cable to passively enter the frame. This pushing process lacks an active guiding and centering mechanism, failing to actively and gently gather the cable after insertion and accurately center it directly below the inspection roller and in the center of the camera's field of view. This results in the cable always being biased to one side, causing uneven contact with the inspection roller, unstable drive, and skewed camera shooting angle, affecting comprehensive and clear monitoring of the cable's surface condition (such as damage or foreign objects). Furthermore, the frame only has fixed guide plates and limiting rollers for passive positioning, unable to dynamically adjust the cable's posture during docking, and unable to ensure the cable is accurately positioned in the core monitoring area directly in front of the camera. This reduces the accuracy and reliability of online safety monitoring.

[0006] Therefore, there is an urgent need for a device that can stably support monitoring equipment on the ground, enabling safe, labor-saving, and precise remote operation, and can achieve rapid, accurate, and automated electrical connection with cables, while ensuring the stability and reliability of monitoring signals. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a modular power distribution system leakage current monitoring device, which solves the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: A modular power distribution system leakage current monitoring device includes: an integrated equipment housing with an adjustment component fixedly connected to the bottom for coarse adjustment of the overall height of the device, and a lifting component fixedly installed inside for precise adjustment of the height of the monitoring unit; a cable testing component including retracting modules symmetrically installed on both sides of the top of the lifting component for actively guiding and positioning the target cable to a predetermined monitoring position of the device; and a leakage current monitoring component installed on the lifting component and located at the end of the guide path of the cable testing component for monitoring the leakage current of the positioned cable; wherein, the retracting module includes a flipping arm that can be flipped outward or folded inward, and an arc-shaped cable guide block installed at the top of the flipping arm, the arc-shaped cable guide block moving linearly under a driving action, thereby retracting and stably positioning the target cable from both sides towards the center; and the leakage current monitoring component including a mounting base, a leakage current monitor detachably installed on the mounting base, and an openable current transformer located on the top of the leakage current monitor, the current transformer being opened and closed by a power drive to attach or detach the target cable that has been guided to its front.

[0009] This invention provides a modular power distribution system leakage current monitoring device. Compared with the prior art, it has the following advantages: 1. To address the problems of dangerous, inefficient, and easily affected monitoring signals caused by manual cable connection at heights, this invention utilizes a combination of a lifting assembly, a cable-sleeving assembly, and a leakage current monitoring assembly to achieve precise mounting and signal acquisition. Specifically, the lifting assembly, driven by a motor, engages a gear and rack to precisely raise and lower the lifting frame along the guide rail, completing the final fine-tuning of the height. Upon reaching the target position, the upper and lower clamping arms of the cable-sleeving assembly automatically close under motor drive, firmly mounting the entire device onto the cable and establishing a stable operating reference. Subsequently, the driving module of the leakage current monitoring assembly, via a cam, pushes the driving arm, causing the current transformer to automatically engage with the cable. This eliminates the need for manual operation at heights, ensuring rapid and accurate electrical connection and stable and reliable monitoring signals.

[0010] 2. To address the challenges of accurately centering multiple or loose cables to the monitoring point and the difficulty in detecting mechanical faults such as loose cable joints, this invention proposes a two-stage cable-gathering module. A screw drives an arc-shaped cable-gathering block to move in opposite directions, gently gathering and precisely guiding the cable to the center position directly in front of the monitoring head. By controlling the engagement state of the magnetic coupling, when switching to the tapping test mode, the power drives the transmission wheel to rotate. Through the cooperation of the eccentric guide post and the strip guide groove, the insulated tapping head taps the cable at a constant frequency, simulating external disturbances. This effectively diagnoses hidden mechanical faults such as loose cable joints and poor contact, improving the comprehensiveness of the monitoring.

[0011] 3. To address the problems of cumbersome and laborious lifting of handheld devices and the complicated setup of aerial work platforms in existing technologies, this invention utilizes a foldable support frame of the support base to unfold and form a stable triangular truss structure, providing a stable platform for ground operations. The quick-locking module and the base locking hole at the lower end of the adjustment component enable rapid locking, while the electromagnet-controlled positioning locking module engages with the height positioning hole, achieving length adjustment and rigid locking. This allows operators to safely and stably lift the main body of the device to the initial cable position several meters high from the ground, reducing work intensity and safety risks. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 A schematic diagram of the internal structure of the integrated housing of the device of the present invention is shown. Figure 1 ; Figure 2 A schematic diagram of the internal structure of the integrated housing of the device of the present invention is shown. Figure 2 ; Figure 3 This diagram illustrates the structure of the primary gathering module and the flapping test component of the present invention. Figure 4 A schematic diagram of the first-stage retraction module and the power transmission module of the present invention is shown; Figure 5 The present invention is shown. Figure 4 A magnified structural diagram of part A in the diagram; Figure 6 A schematic diagram of the leakage current monitoring component and lifting component of the present invention is shown; Figure 7 A schematic diagram of the leakage current monitoring component of the present invention is shown; Figure 8 A schematic diagram of the mounting base and snap-fit ​​module structure of the present invention is shown; Figure 9 The present invention is shown. Figure 8 A schematic diagram of the enlarged structure of part B in the diagram; Figure 10 A schematic diagram of the overall structure of the present invention is shown; Figure 11 A schematic diagram of the folding ladder frame structure of the present invention is shown; Figure 12 A schematic diagram of the adjustment component and positioning locking module of the present invention is shown; Figure 13 A schematic diagram of the positioning and locking module structure of the present invention is shown; Figure 14 A schematic diagram of the folding ladder frame and quick-locking module of the present invention is shown; Figure 15 A schematic diagram of the working state structure of the present invention is shown; Figure 16 A schematic diagram of the two-stage gathering module of the present invention is shown. As shown in the figure:

[0014] 100. Support base; 110. Quick-locking module; 111. Locking seat; 112. Elastic locking rod; 113. Locking pin; 120. Folding ladder frame; 121. Central column; 122. Side support rod; 123. Auxiliary support rod; 124. Hinge seat; 125. Hinge shaft; 126. Insertion cavity; 127. Inner cavity; 200. Equipment integrated enclosure; 300. Cable testing assembly; 310. First-stage cable retraction module; 311. Transmission housing; 312. Housing support block; 313. Tilting arm; 314. Lifting frame mounting base; 315. Arc-shaped cable guide block; 316. Linear drive block; 317. Retraction drive screw; 318. Screw transmission cavity; 319. Power input cavity; 320. Beating test assembly; 321. Insulated beater head; 322. Beater arm; 323. Eccentric guide... Column; 324, Transmission wheel; 325, Strip guide groove; 330, Power transmission module; 331, Main drive input shaft; 332, First magnetic coupling; 333, First bevel gear commutator; 334, First vertical transmission shaft; 335, Second magnetic coupling; 336, Second vertical transmission shaft; 337, Second bevel gear commutator; 338, Transmission mechanism protective cover; 339, Output shaft; 340, Secondary retraction module; 400. Adjustment component; 401. Outer rod; 402. Inner guide rod; 403. Height positioning hole; 404. Mounting head; 405. Base locking hole; 406. Handle; 410. Positioning and locking module; 411. Locking device protective cover; 412. Wedge-shaped thrust head; 413. Elastic positioning block; 414. Angled guide groove; 415. Positioning teeth; 500. Leakage current monitoring component; 501. Current transformer; 502. Mounting base; 503. Leakage current monitor; 504. Drive swing arm; 510. Drive module; 511. Cam drive protective cover; 512. Cam; 513. Cam drive shaft; 520. Snap-fit ​​module; 521. Mounting seat; 522. Elastic snap-fit; 523. Limit block; 524. Guide block; 600. Lifting assembly; 601. Lifting frame; 602. Guide rail slider; 603. Guide rail; 604. Rack; 605. Support plate; 606. Drive gear; 700, Cable assembly; 701, Upper clamp arm; 702, Lower clamp arm. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] As an embodiment of the present invention, in order to solve the technical problems in the background art, the following modular power distribution system leakage current monitoring device is provided: Combination Figures 1-15As shown, the present invention provides an assembled power distribution system leakage current monitoring device, comprising: a support base 100, an adjustment component 400, an equipment integration box 200, a lifting component 600, a leakage current monitoring component 500, a cable testing component 300, and a cable assembly 700.

[0017] It should be noted that the support base 100 provides a stable ground operating platform for the entire monitoring device; a detachable adjustment component 400 is built into one side of the base, the length of which is adjustable, and is used to lift the monitoring unit from the ground to the target cable for positioning; an integrated equipment housing 200 is fixedly installed on the top of the adjustment component 400, and a liftable lifting component 600 is installed on one side inside the integrated equipment housing 200 for achieving a final precise connection with the cable; a detachable leakage current monitoring component 500 is fixedly installed on the top of the lifting component 600 for collecting and monitoring the leakage current of the cable to ensure the accuracy and stability of the electrical connection; a cable sleeve component 700 is installed on one side of the lifting component 600 for automatically clamping and securely mounting the entire device onto the target cable; a cable testing component 300 is installed on the lifting component 600 on one side of the leakage current monitoring component 500 to assist in the gathering and positioning of the cable before monitoring and to determine the mechanical stability of the cable connection.

[0018] In one embodiment of the present invention, to solve the problems of the handheld adjustment component lifting device being bulky, laborious, and unstable. For example... Figure 10 , Figure 11 As shown, the support base 100 includes a foldable support frame 120 and a quick-locking module 110.

[0019] In practice, the foldable support frame 120 serves as the main load-bearing structure of the base, and is hinged together by a main support rod 121 as the main trunk, multiple climbing rods 122, and a secondary support rod 123. The bottom of the main support rod 121 is equipped with anti-slip pads.

[0020] Furthermore, the secondary support rod 123 is arranged parallel to the main support rod 121, and the two are hinged to the two ends of multiple climbing rods 122 through multiple connectors 124 and pins 125, thereby forming a deployable and stable triangular truss structure.

[0021] Furthermore, the secondary support rod 123 has an adjustment component insertion cavity 126 inside, which is used to accommodate and fix the lower end of the adjustment component 400. When the foldable support frame 120 is unfolded through the hinge point, it forms a stable A-shaped or trapezoidal support structure. When it is folded, the rods can be brought together on one side of the main support rod 121, and the secondary support rod 123 and climbing rod 122 are accommodated by the inner cavity 127, which greatly reduces the space occupied.

[0022] Furthermore, the quick-locking module 110 is mounted on the secondary support rod 123 for quickly locking the adjusting assembly 400 inserted into the insertion cavity 126. It includes a locking seat 111 fixed to the secondary support rod, which contains a laterally sliding elastic locking rod 112. The elastic locking rod 112 has a locking pin 113 at its inner end and a pull cap at its outer end. It is understood that, as... Figure 14 As shown, when the lower end of the adjusting component 400 is inserted into the insertion cavity 126, the base locking hole 405 on its side aligns with the locking pin 113. Under the action of the spring, the locking pin 113 automatically springs into the base locking hole 405 to complete the locking. When disassembling, it is only necessary to pull the elastic locking rod 112 outward to make the locking pin 113 exit the hole.

[0023] In one embodiment of the present invention, to solve the problem of operators needing to safely and stably lift the monitoring device to the cable several meters high from the ground, and to avoid using heavy climbing machinery, such as... Figures 11-12 As shown, the proposed adjustment assembly 400 includes an outer rod 401, an inner guide rod 402, and a positioning and locking module 410. The top of the inner guide rod 402 is fixedly connected to the bottom of the integrated housing 200 via a mounting head 404. A retractable outer rod 401 is fitted onto the outer side of the inner guide rod 402, and multiple height positioning holes 403 are evenly distributed on the side of the inner guide rod 402. A positioning and locking module 410 extending into the inner side of the outer rod 401 is fitted onto the side of the outer rod 401, which mates with different height positioning holes 403 to achieve height locking after extension and retraction. A handle 406 is fixedly installed at the bottom of the outer side of the outer rod 401 for easy gripping and operation by the operator.

[0024] Furthermore, the lower end of the outer rod 401 is designed as a column that mates with the insertion cavity 126 of the support base 100, and a base locking hole 405 is provided. The positioning and locking module 410 is used to realize the telescopic locking between the outer rod 401 and the inner guide rod 402.

[0025] Understandably, the inner guide rod 402 and outer rod 401 of the adjustment component 400 are telescopically compatible, and the positioning locking module 410 connects with the height positioning hole 403 to achieve precise height positioning and adapt to different ground monitoring height requirements; the base locking hole 405 cooperates with the quick locking module 110 to ensure stable connection with the support base 100; the handle 406 at the bottom of the outer rod 401 makes it easy for operators to hold and lift, reducing work fatigue; the mounting head 404 achieves a stable connection between the adjustment component 400 and the equipment integrated housing 200, preventing the equipment from shaking during extension and retraction.

[0026] To ensure that the adjustment assembly maintains a fixed length during lifting and operation, prevents accidental retraction, and enables rapid remote adjustment, the positioning and locking module 410 proposed in this invention includes a locking device protective cover 411, a wedge-shaped thrust head 412, an elastic positioning block 413, an inclined guide groove 414, and a miniature electromagnet. The locking device protective cover 411 is fixedly attached to the side of the outer rod 401, and the elastic positioning block 413 is elastically installed inside it. Positioning teeth 415 are fixedly installed on the side of the elastic positioning block 413 for engaging with the height positioning hole 403 on the inner guide rod for locking.

[0027] Furthermore, the outer edge of the elastic positioning block 413 is provided with inclined guide grooves 414 on both sides. A movable wedge-shaped thrust head 412 is installed on the front and back of the locking device protective cover 411. The inner end of the wedge-shaped thrust head 412 extends into the inclined guide groove 414, and the mating surface is inclined. A miniature electromagnet is integrated into the locking device protective cover 411 and connected to the wedge-shaped thrust head 412. When height adjustment is required, the main unit controls the miniature electromagnet to push the wedge-shaped thrust head 412, forcing the elastic positioning block 413 to move laterally through the inclined surface of the inclined guide groove 414, causing the positioning teeth 415 to disengage from the height positioning hole 403, allowing the outer sleeve rod 401 to extend and retract freely. After adjusting to the target height, the electromagnet thrust is released, and the elastic positioning block 413 resets under its own elastic force, with the positioning teeth 415 engaging the corresponding height positioning hole 403, achieving rigid locking.

[0028] In one embodiment of the present invention, to achieve rapid, accurate, and automated electrical connection with cables, avoid the dangers and inefficiencies of manual operation at heights, and ensure the stability and reliability of monitoring signals, as follows: Figure 1 , Figure 6 As shown, the proposed leakage current monitoring component 500 is used to electrically connect with the cable to monitor leakage current, and includes a current transformer 501, a mounting base 502, a leakage current monitor 503, and a drive module 510.

[0029] In practice, the mounting base 502 is fixedly installed on the top of the lifting assembly 600. The mounting base 502 contains a leakage current monitor 503 for signal acquisition and preliminary processing. The leakage current monitor 503 is connected to an external host for monitoring and management. The host is electrically connected to all actuators (motors, electromagnets) to issue control commands.

[0030] Furthermore, to achieve automatic opening and closing of the monitoring head, such as Figure 7As shown, openings are provided on both sides of the top of the leakage current monitor 503. Multiple drive arms 504 are rotatably installed inside the openings. A current transformer 501 for monitoring leakage current is fixedly installed on the top of the drive arms 504, and its bottom is fixedly installed on the top of the two drive arms 504. To ensure docking accuracy and operational safety, at least two laser range sensors are installed symmetrically inside the opening of the current transformer 501 for accurately measuring the distance to the target cable. A miniature torque sensor is embedded on the rotation axis of the drive arms 504 for real-time monitoring of the torque applied to the cable by the current transformer 501 during the closing process, preventing damage to the cable due to excessive tightness or instability of the monitoring signal due to excessive looseness.

[0031] Furthermore, the drive module 510 provides the power for automatic opening and closing. In specific implementations, it is installed on both sides of the mounting base 502, including a cam drive protective cover 511 and a cam 512. The drive end (cam 512) extends into the opening and closing port and directly engages with a specific contour surface of the drive swing arm 504. Figure 1 , Figure 7 As shown, the cam-driven protective cover 511 is fixedly mounted on the mounting base 502 and communicates with the opening and closing port. A drive motor is fixed inside the cam-driven protective cover 511. The output shaft of the motor drives the cam drive shaft 513 to rotate, and the cam 512 fixed on the cam drive shaft 513 rotates accordingly. It can be understood that by rotating the specific surface of the cam 512, the drive swing arm 504 is periodically squeezed or released, thereby converting its rotational motion into the swing of the drive swing arm 504, and finally driving the current transformer 501 to achieve precise opening and closing actions.

[0032] Furthermore, to facilitate rapid on-site maintenance or replacement of the leakage current monitor 503, this invention also proposes to fix a snap-fit ​​module 520 at the bottom of the leakage current monitor 503. For example... Figure 8 , Figure 9 As shown, the snap-fit ​​module 520 includes a mounting base 521 fixed to the bottom of the leakage current monitor 503, an elastic buckle 522, and a limiting block 523.

[0033] In practice, the mounting base 521 has elastically retractable buckles 522 on both sides inside. Correspondingly, limit blocks 523 are fixedly installed on both sides inside the mounting base 502, and guide blocks 524 with inclined guide surfaces are slidably installed below the limit blocks 523. It is understood that when the leakage current monitor 503 needs to be installed, it is aligned with the slot of the mounting base 502 and pressed down. The elastic buckles 522 first contact the inclined surface of the guide block 524 and are squeezed inward. Continuing to press down, when the elastic buckles 522 pass the lower edge of the limit block 523, they will pop outward under their own elastic force, and their top hooks will precisely lock under the limit block 523, thus firmly locking the leakage current monitor 503 inside the mounting base 502. For disassembly, simply press the elastic buckles 522 on both sides inward simultaneously to release them from the constraint of the limit blocks 523, and the leakage current monitor 503 can be removed upward.

[0034] In one embodiment of the present invention, to solve the problem of difficulty in accurately locating multiple or loose cables to the center of the monitoring head, such as... Figure 1 As shown, the proposed cable testing assembly 300 includes a primary coiling module 310, a secondary coiling module 340, a flapping test assembly 320, and a power transmission module 330 that provides power to both. In specific implementation, as... Figure 3 As shown, the primary retraction module 310 and the secondary retraction module 340 are symmetrically mounted on both sides of the top of the lifting assembly 600 via the lifting frame mounting base 314 and another lifting frame mounting base, respectively, and can cooperate to move in opposite directions. The flapping test assembly 320 is mounted on the side of the primary retraction module 310 and is driven by the power transmission module 330, as shown. Figure 5 As shown, the power transmission module 330 is installed inside the first-stage retraction module 310 and can selectively output power to the retraction or flapping test component.

[0035] Furthermore, such as Figure 1 , Figures 3-5As shown, the primary retracting module 310 includes a flipping arm 313, a lifting frame mounting base 314, a transmission housing 311, an arc-shaped cable guide block 315, and a linear drive block 316. The lifting frame mounting base 314 is fixed to the lifting assembly 600, and the flipping arm 313 is mounted on its side via a pivot, allowing the entire module to be flipped outwards or folded inwards for storage. The transmission housing 311 is fixed to the top of the flipping arm 313, and the bottom of the housing is supported on the integrated equipment housing 200 during operation via a housing support block 312 to enhance stability. The top of the transmission housing 311 has a screw transmission cavity 318, within which a retracting drive screw 317 is rotatably mounted. The linear drive block 316 is threaded onto the retracting drive screw 317 and can move linearly along its axis when the screw rotates. The arc-shaped cable guide block 315 is mounted on the top of the linear drive block 316 via an elastic hinge, and its concave arc surface is used to fit the cable. The function of this module is: when the retraction drive screw 317 is driven, the linear drive block 316 drives the arc-shaped cable guide block 315 to move linearly, thereby gently retracting the cable towards the central area of ​​the device, ensuring that the cable is accurately guided to the monitoring position directly in front of the leakage current monitoring component 500, and improving docking efficiency and accuracy.

[0036] Furthermore, such as Figure 16 As shown, the structure of the secondary gathering module 340 is mirror-symmetrical to that of the primary gathering module 310. The purpose is to coordinate with the arc-shaped cable guide block 315 of the primary gathering module 310 to move in opposite directions or in the opposite direction, thereby achieving the centering positioning of a single cable or the synchronous gathering and aggregation of multiple cables.

[0037] Furthermore, such as Figures 3-4 As shown, the tapping test assembly 320 includes an insulated tapping head 321, a tapping arm 322, an eccentric guide post 323, and a drive wheel 324. The tapping arm 322 is movably mounted on the side of the flipping arm 313, with the insulated tapping head 321 for contacting the cable fixed at its top. A strip-shaped guide groove 325 is formed on the tapping arm 322. The drive wheel 324 is driven to rotate by the power transmission module 330, and an eccentric guide post 323 is fixedly mounted on its surface, inserted into the strip-shaped guide groove 325 of the tapping arm 322. The purpose is that when the drive wheel 324 rotates at a constant speed, the eccentric guide post 323 performs a circular motion accordingly. Through its sliding and limiting action within the strip-shaped guide groove 325, the rotational motion is converted into the reciprocating oscillation of the tapping arm 322 around its hinge point, thereby driving the insulated tapping head 321 to tap the cable at a constant frequency and amplitude. This action can be used to simulate external vibration or disturbance, and combined with changes in leakage current monitoring signals, to diagnose hidden mechanical faults such as loose cable joints and poor contact.

[0038] Furthermore, to ensure stable power transmission and convenient switching. For example... Figure 5As shown, the power transmission module 330 proposed in this invention includes a main drive input shaft 331, a first magnetic coupling 332, a second magnetic coupling 335, a first vertical transmission shaft 334, a second vertical transmission shaft 336, an output shaft 339, a first bevel gear commutator 333, and a second bevel gear commutator 337. The top of the transmission housing 311 has a power input cavity 319, inside which the main drive input shaft 331 is rotatably mounted. A first magnetic coupling 332 is fitted between the main drive input shaft 331 and the retracting drive screw 317 for transmission cooperation. A first vertical transmission shaft 334 extending out of the transmission housing 311 is rotatably mounted at the bottom of the power input cavity 319. A transmission mechanism protective cover 338 is fixedly mounted on the side of the tilting arm 313. A second vertical transmission shaft 336 extending into the top of the transmission mechanism protective cover 338 is rotatably mounted therein. 36 corresponds to the first vertical drive shaft 334. A second magnetic coupling 335 is installed between the second vertical drive shaft 336 and the first vertical drive shaft 334 for transmission cooperation. A vibrating output shaft 339 extending into the side of the transmission mechanism protective cover 338 is rotatably mounted. The outer end of the output shaft 339 is installed and connected to the transmission wheel 324. The inner end of the output shaft 339 is equipped with a second bevel gear commutator 337 that is transmission connected to the second vertical drive shaft 336. The top end of the first vertical drive shaft 334 is equipped with a first bevel gear commutator 333 that is transmission connected to the main drive input shaft 331.

[0039] Understandably, the main drive input shaft 331 receives input power from the main control motor. By controlling the engagement and disengagement of the two magnetic couplings, it achieves rapid and lossless switching of the power path. When cable retraction is required: the first magnetic coupling 332 engages, the second magnetic coupling 335 disengages, and the power autonomous shaft 331 is reversed via the first bevel gear commutator 333 and then directly transmitted to the retraction drive screw 317 via the first magnetic coupling 332, driving it to rotate and thus performing the retraction action. When a tapping test is required: the first magnetic coupling 332 disengages, the second magnetic coupling 335 engages, the power autonomous shaft 331 transmits power to the first vertical transmission shaft 334 via the first bevel gear commutator 333, and then to the second vertical transmission shaft 336 via the engaging second magnetic coupling 335. Subsequently, the direction is changed by the second bevel gear commutator 337, ultimately driving the output shaft 339 and the transmission wheel 324 mounted at its end to rotate, thereby driving the tapping test assembly 320 to work.

[0040] It should be noted that the non-contact transmission characteristics of the magnetic coupling enable rapid switching of power channels and overload protection, reducing mechanical wear and maintenance difficulty; at the same time, the first bevel gear commutator ensures stable and efficient power transmission in different directions, saving space.

[0041] In one embodiment of the present invention, to achieve precise height adjustment of the monitoring unit relative to the device body and the target cable, such as... Figures 1-2 As shown, the lifting assembly 600 proposed in this invention includes a lifting frame 601, a guide rail slider 602, two sets of guide rails 603 fixedly installed on one side inside the equipment integration box 200, and a lifting drive mechanism fixedly installed on the equipment integration box 200 and connected to the lifting frame 601 for transmission.

[0042] In practical implementation, two sets of guide rails 603 are vertically fixedly installed on one side inside the integrated housing 200 of the equipment, forming a guide rail for lifting movement. A guide rail slider 602, which cooperates with the guide rails 603, is slidably installed on the guide rails. The lifting frame 601 is fixedly connected to the guide rail slider 602, thus constraining it to only be able to move in a vertical straight line along the guide rails 603. This provides driving power and precisely controls the lifting position.

[0043] Furthermore, the lifting drive mechanism includes a rack 604 and a drive gear 606 fixedly mounted on a housing structure between two guide rails 603. The drive gear 606, driven by a lifting drive motor, is fixedly mounted on the side of the lifting frame 601, and meshes with the rack 604 for transmission. A support plate 605 is fixedly mounted on the other side of the lifting frame 601, and a mounting base 502 is mounted on the support plate 605. Thus, by controlling the forward and reverse rotation of the motor, the drive gear 606 can be driven to roll along the rack 604, thereby smoothly lifting and lowering the entire lifting frame 601. On the other side of the lifting frame 601, a support plate 605 is fixedly mounted for directly mounting the mounting base 502 of the leakage current monitoring component 500.

[0044] Based on the above technical concept, it can be understood that the lifting height of the lifting frame 601 can be precisely and controllably adjusted through the meshing transmission of the motor-driven gear and rack, thereby ensuring that the leakage current monitoring component 500 on its top can achieve precise spatial docking with target cables at different heights or positions. The lifting frame 601 ensures smooth and stable movement without shaking during the lifting process through the sliding cooperation between the guide rail slider 602 and the sturdy guide rail 603, providing a stable working platform for the leakage current monitoring component 500 and the cable testing component 300 installed above, and ensuring the accuracy and reliability of the monitoring action.

[0045] In one embodiment of the present invention, in order to achieve a rapid and stable connection between the monitoring device and the target cable during the mounting operation, and to form a reliable aerial operation reference point, as follows: Figures 1-2As shown, the cable clamping assembly 700 proposed in this invention consists of an upper clamping arm 701 and a lower clamping arm 702, both of which are hinged to the same side of the lifting frame 601 via built-in drive motors. The upper clamping arm 701 is controlled to rotate downwards, while the lower clamping arm 702 rotates upwards simultaneously, forming a circular clamping mechanism with the upper clamping arm 701. It can be understood that the automatic opening and closing of the clamping plates via electric drive enables rapid and secure clamping of target cables of different diameters, thereby reliably transferring the weight and workload of the entire device to the cable itself. This effectively prevents the device from slipping or falling during monitoring. Simultaneously, the ring-shaped structure of the semi-circular clamping plate can adapt to cables of different diameters, avoiding the risk of the device falling. Its rotatable connection to the lifting frame 601 allows for adjustment of the cable angle according to the device, ensuring monitoring stability.

[0046] In one embodiment of the present invention, the principle for achieving efficient remote ground monitoring is as follows: S1. Ground support base deployment and device assembly First, unfold the foldable support frame 120 of the ground support base 100 from the folded state to form a stable triangular support structure. Insert the lower end of the adjustment component 400 into the adjustment component insertion cavity 126 at the top of the support base. Use the elastic locking rod 112 and locking head 113 of the quick locking module 110 to automatically lock into the base locking hole 405, completing the quick rigid connection between the two and establishing a stable ground working platform.

[0047] S2, Adjustment component lifting and initial positioning The operator holds the device with the handle 406 and adjusts the relative length of the outer rod 401 and the inner guide rod 402 by controlling the positioning and locking module 410 of the main unit control adjustment component 400. This raises the upper unit of the integrated equipment housing 200 to the approximate height of the target cable and locks it to accommodate cables of different heights.

[0048] S3, Lifting mechanism extends and is fixed to cable clamp. The lifting assembly 600 is activated, and the motor drives the drive gear 606 to move along the rack 604, causing the lifting frame 601 to rise smoothly along the guide rail 603, so that the cable clamping assembly 700 and the leakage current monitoring assembly 500 are fully extended out of the equipment integrated housing. The operator fine-tunes the position of the device, and through the main unit, controls the upper clamping arm 701 and the lower clamping arm 702 of the cable clamping assembly 700 to rotate and close in opposite directions, firmly clamping the target cable.

[0049] S4. Precise cable retraction and connection to the monitoring head. When the control cable testing assembly 300 is in operation, the power transmission module 330 switches the power to the retraction mode, driving the arc-shaped retraction blocks of the first-level retraction module 310 and the second-level retraction module 340 to move towards each other, accurately retracting the cable to the center of the monitoring area. Through the drive module 510, the cam 512 rotates, pushing the drive swing arm 504 to drive the current transformer 501 to automatically open, fit the cable, and close. Laser ranging and torque sensors are used to ensure the accuracy and safety of the docking process and guarantee signal acquisition.

[0050] S5, Comprehensive Monitoring and Diagnostic Testing While the current transformer 501 continuously monitors the leakage current, the power transmission module 330 switches the power to vibration mode through the tapping test function of the cable test assembly 300, driving the insulated tapping head 321 of the tapping test assembly 320 to tap the cable at a set frequency to simulate mechanical disturbance.

[0051] S6. Work Completion and Equipment Storage After monitoring is completed, control each actuator to reset in reverse order: stop the tapping, open the current transformer, reset the retracting block, loosen the cable of the cable assembly, lower and retract the lifting frame, and finally, release the lock between the adjustment assembly and the support base, separate the two, and fold the support base and adjustment assembly respectively to complete the equipment storage.

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A modular power distribution system leakage current monitoring device, characterized in that, include: The equipment is integrated into a housing (200), with an adjustment component (400) fixedly connected to the bottom for coarse adjustment of the overall height of the device, and a lifting component (600) fixedly installed inside for precise adjustment of the height of the monitoring unit. The cable testing assembly (300) includes a folding module symmetrically installed on both sides of the top of the lifting assembly (600) for actively guiding and positioning the target cable to a predetermined monitoring position of the device; A leakage current monitoring component (500) is installed on the lifting component (600) and located at the end of the guide path of the cable testing component (300) for monitoring leakage current of the positioned cable. The gathering module includes a flip arm (313) that can be flipped outward or folded inward and an arc-shaped cable guide block (315) installed on the top of the flip arm (313). The arc-shaped cable guide block (315) moves linearly under the driving action, thereby gathering the target cable from both sides toward the center and positioning it stably. The leakage current monitoring component (500) includes a mounting base (502), a leakage current monitor (503) detachably mounted on the mounting base (502), and an openable current transformer (501) disposed on the top of the leakage current monitor (503). The current transformer (501) is opened and closed by power drive to attach or detach from the target cable that has been guided to its front.

2. The assembled power distribution system leakage current monitoring device according to claim 1, characterized in that: The retraction module also includes a transmission housing (311), a lifting frame mounting base (314), a linear drive block (316), and a retraction drive screw (317). The lifting frame mounting base (314) is fixed on the lifting assembly (600), and the flipping arm (313) is mounted on its side via a rotating shaft, so that the entire folding module can be flipped outward or folded inward for storage. The transmission housing (311) is fixed to the top of the flipping arm (313), and a transmission cavity is formed inside it. Its bottom is supported on the equipment integrated box (200) during operation by the housing support block to enhance stability. The retracting drive screw (317) is rotatably installed in the transmission cavity, and the linear drive block (316) is threadedly connected to the retracting drive screw (317). When the retracting drive screw (317) is driven, the linear drive block (316) drives the arc-shaped cable guide block (315) to move linearly, thereby gently retracting the cable towards the central area of ​​the device, ensuring that the cable is accurately guided to the monitoring position directly in front of the leakage current monitoring component (500), and improving docking efficiency and accuracy.

3. The assembled power distribution system leakage current monitoring device according to claim 2, characterized in that: The top of the transmission housing (311) is provided with a power input cavity (319), and a main drive input shaft (331) is rotatably mounted inside the power input cavity (319). The main drive input shaft (331) is connected to a first vertical transmission shaft (334) located below and coaxially arranged through a first-stage bevel gear commutator (333). The first vertical transmission shaft (334) extends rotatably from the bottom of the power input cavity (319) out of the transmission housing (311), and its end is selectively connected to the top of the second vertical transmission shaft (336) through a second magnetic coupling (335). The second vertical drive shaft (336) is rotatably mounted inside the transmission mechanism protective cover (338) fixed on the side of the tilting arm (313); the bottom end of the second vertical drive shaft (336) is connected to the horizontally set output shaft (339) through a two-stage bevel gear commutator (337) to drive the tapping test assembly (320). The main drive input shaft (331) is selectively connected to the retraction drive screw (317) via a first magnetic coupling (332). By controlling the engagement and disengagement states of the first magnetic coupling (332) and the second magnetic coupling (335), the power output can be switched to the retraction function or the flapping test function.

4. The assembled power distribution system leakage current monitoring device according to claim 3, characterized in that: The tapping test assembly (320) includes an insulated tapping head (321), a tapping arm (322), an eccentric guide post (323), and a transmission wheel (324). The vibrating arm (322) is movably mounted on the side of the flipping arm (313), and an insulated vibrating head (321) for contacting the cable is fixed at its top. A strip-shaped guide groove (325) is provided on the vibrating arm (322). The transmission wheel (324) is connected to the output shaft (339), and an eccentric guide post (323) is fixedly mounted on its wheel surface. The eccentric guide post (323) is slidably disposed in the strip-shaped guide groove (325).

5. The assembled power distribution system leakage current monitoring device according to claim 1, characterized in that: The adjustment assembly (400) includes an outer rod (401), an inner guide rod (402), and a positioning and locking module (410). The lower end of the outer rod (401) is connected to the external support structure; the inner guide rod (402) is slidably sleeved inside the outer rod (401), and its top end is fixedly connected to the bottom of the integrated equipment box (200), and multiple height positioning holes (403) are evenly distributed on the side; the positioning locking module (410) is installed on the side wall of the outer rod (401) and is used to selectively engage with different height positioning holes (403) to lock the relative extension and retraction position of the outer rod (401) and the inner guide rod (402).

6. The assembled power distribution system leakage current monitoring device according to claim 5, characterized in that: The positioning and locking module (410) includes a locking device protective cover (411), a wedge-shaped thrust head (412), an elastic positioning block (413), and an inclined guide groove (414). The locking device protective cover (411) is fixed to the side wall of the outer sleeve rod (401), and an elastic positioning block (413) is elastically installed inside it. The side of the elastic positioning block (413) is provided with positioning teeth (415) for cooperating with the height positioning hole (403), and an inclined guide groove (414) is provided on the outer edge surface. The wedge-shaped thrust head (412) is movably installed on the locking device protective cover (411), with its inner end extending into the inclined guide groove (414) and its outer end connected to a miniature electromagnet.

7. The assembled power distribution system leakage current monitoring device according to claim 1, characterized in that: The leakage current monitoring component (500) also includes a snap-fit ​​module (520) for quickly locking and releasing the bottom of the leakage current monitor (503) from the mounting base (502); the snap-fit ​​module (520) includes a mounting base (521), an elastic buckle (522), and a limiting block (523). The mounting base (521) is fixed to the bottom of the leakage current monitor (503), and elastic buckles (522) that can be elastically extended and retracted are provided on both sides inside the base; the limiting block (523) is fixed to both sides inside the mounting base (502), and a guide block (524) with an inclined guide surface is slidably installed below the limiting block (523).

8. A modular power distribution system leakage current monitoring device according to claim 1 or 7, characterized in that: The leakage current monitoring component (500) also includes a drive module (510), which includes a cam drive protective cover (511), a drive motor and a cam (512), and a cam drive shaft (513). The cam drive protective cover (511) is fixed on the mounting base (502) and communicates with the opening and closing port on the top of the leakage current monitor (503). The drive motor is fixed inside the cam drive protective cover (511) and its output shaft is connected to the cam drive shaft (513). The cam (512) is fixed on the cam drive shaft (513) and its drive end extends into the opening and closing port. The two sides of the opening are respectively rotatably installed with drive swing arms (504), the top of the drive swing arms (504) is connected to the current transformer (501), and the drive swing arms (504) have a contour surface that matches the outer edge surface of the cam (512) so that the rotational motion of the cam (512) can be converted into the swing of the drive swing arms (504).

9. The assembled power distribution system leakage current monitoring device according to claim 1, characterized in that: The lifting assembly (600) includes a guide rail (603) fixed inside the equipment integrated housing (200), a lifting frame (601) slidably engaged with the guide rail (603), and a lifting drive mechanism fixedly installed on the equipment integrated housing (200) and connected to the lifting frame (601) for transmission. The lifting frame (601) moves up and down along the guide rail (603).

10. A modular power distribution system leakage current monitoring device according to claim 9, characterized in that: The lifting drive mechanism includes a rack (604) fixed on the integrated housing (200) of the equipment and a drive gear (606) mounted on the lifting frame (601) and meshing with the rack (604). The drive gear (606) is driven by a lifting drive motor.

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