CN117673948A

CN117673948A - Overhead line overhauling system

Info

Publication number: CN117673948A
Application number: CN202211042672.XA
Authority: CN
Inventors: 刘恒
Original assignee: Fengyi Technology Shenzhen Co ltd
Current assignee: Fengyi Technology Shenzhen Co ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2024-03-08

Abstract

The application provides an overhead line overhaul system, which comprises an unmanned aerial vehicle, a landing gear, a cable docking device and a maintenance device, wherein the unmanned aerial vehicle is used for flying along an overhead line; the landing gear is arranged at the bottom of the unmanned aerial vehicle; the cable docking device is arranged on the landing gear and is used for docking with the overhead line in the air; the maintenance device is arranged at the bottom of the unmanned aerial vehicle and is used for maintaining the overhead line in a state that the cable docking device is docked with the overhead line. After the cable butt joint device carried on the unmanned aerial vehicle is in butt joint with the overhead line in the air, the unmanned aerial vehicle can fly along the overhead line and repair broken strand positions of the overhead line through the maintenance device. Compared with the existing overhead line maintenance technology, the overhead line maintenance system does not need to carry out manual overhead operation, is safer and more convenient, and effectively ensures personnel safety.

Description

Overhead line overhauling system

Technical Field

The application belongs to overhead line maintenance technical field, especially relates to an overhead line maintenance system.

Background

The overhead line may be broken after being used for a period of time, so that maintenance is required at the broken position of the overhead line. At present, a manual maintenance mode and a power transmission line robot maintenance mode (the power transmission line robot is required to be installed at high altitude) are mainly adopted for maintenance of the broken strand of the overhead line, however, the two maintenance modes are required to be operated at high altitude, and great personnel potential safety hazards exist.

Disclosure of Invention

The embodiment of the application provides an overhead line overhaul system to solve the problem that current overhead line overhaul technology has great personnel potential safety hazard.

The overhead line overhaul system comprises an unmanned aerial vehicle, a landing gear, a cable docking device and a maintenance device, wherein the unmanned aerial vehicle is used for flying along an overhead line; the landing gear is arranged at the bottom of the unmanned aerial vehicle; the cable docking device is arranged on the landing gear and is used for docking with the overhead line in the air; the maintenance device is arranged at the bottom of the unmanned aerial vehicle and is used for maintaining the overhead line in a state that the cable docking device is docked with the overhead line.

Optionally, the cable docking device includes a cable docking mechanism, where the cable docking mechanism includes a mounting rack and two cable docking assemblies respectively disposed on two opposite sides of the mounting rack, and the cable docking assembly includes a driving piece, a multi-link structure and a claw; the claw is rotationally connected to the mounting frame, one end of the multi-connecting-rod structure is rotationally connected with the claw, the other end of the multi-connecting-rod structure is connected with the output end of the driving piece, and the driving piece can drive the multi-connecting-rod structure to drive the claw to rotate so that the corresponding claw is close to or far away from the other claw.

Optionally, the cable docking assembly further includes a torsion spring, the claw is rotationally connected with the mounting frame through a first rotating shaft, and the torsion spring is sleeved on the first rotating shaft.

Optionally, the mounting frame is provided with a channel, the claw comprises a claw body and a connecting part, one end of the connecting part is connected with the claw, and the other end of the connecting part penetrates through the channel to be rotationally connected with the multi-connecting-rod structure; the cable butt joint assembly further comprises a limiting piece, wherein the limiting piece is arranged at one end, close to the multi-connecting-rod structure, of the connecting portion and located outside the channel, and the length of the limiting piece is larger than the width of the channel.

Optionally, the multi-connecting-rod structure comprises a rocker arm and a connecting rod, wherein a waist-shaped hole is formed in one end, connected with the rocker arm, of the connecting rod, and the waist-shaped hole extends along the length direction of the connecting rod; one end of the rocker arm is connected with the output end of the driving piece, the other end of the rocker arm is rotationally connected with the connecting rod through the waist-shaped hole, and the other end of the connecting rod is rotationally connected with the connecting part.

Optionally, the overhead line overhaul system further comprises a shooting device, wherein the shooting device is arranged on the cable docking device and is used for shooting the clamping jaw and the overhead line.

Optionally, the shooting device includes first camera and second camera, first camera sets up the top of mounting bracket, the second camera sets up one side of cable docking mechanism, first camera with the camera lens of second camera all is directed towards the jack catch.

Optionally, the cable docking device further includes two buffer mechanisms respectively disposed on two opposite sides of the mounting frame, the buffer mechanisms are respectively rotatably connected with the landing gear and the mounting frame, and the second camera is mounted on one of the buffer mechanisms.

Optionally, the landing gear comprises a platform and a plurality of supporting feet, and the supporting feet are installed at the bottom of the platform and are uniformly arranged along the circumferential direction of the platform; the top of platform is provided with a plurality of bracing pieces, the top of bracing piece is connected unmanned aerial vehicle's bottom.

Optionally, the platform includes the frame, first branch and the second branch of enclosing of octagon, first branch with the second branch all is located enclose in the frame, first branch with the second branch alternately sets up and both ends are connected respectively enclose the frame.

According to the overhead line overhaul system, after the cable docking device mounted on the unmanned aerial vehicle is in butt joint with the overhead line in the air, the unmanned aerial vehicle can fly along the overhead line and repair broken strand positions of the overhead line through the maintenance device. Compared with the existing manual maintenance mode and the power transmission line robot maintenance mode, the overhead line maintenance system provided by the embodiment of the application does not need to perform manual overhead operation, is safer and more convenient, and effectively ensures personnel safety.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort to a person skilled in the art.

For a more complete understanding of the present application and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings. Wherein like reference numerals refer to like parts throughout the following description.

Fig. 1 is a schematic structural diagram of an overhead line inspection system according to an embodiment of the present application.

Fig. 2 is an exploded structural schematic view of the overhead line inspection system shown in fig. 1.

Fig. 3 is a front view of the overhead line inspection system shown in fig. 1.

Fig. 4 is a left side view of the overhead line inspection system shown in fig. 1.

Fig. 5 is a top view of the overhead line inspection system shown in fig. 1.

Fig. 6 is a schematic structural diagram of a landing gear, a cable docking device, and a photographing device according to an embodiment of the present application.

Fig. 7 is a front view of the landing gear, cable dock, and camera of fig. 6.

Fig. 8 is a schematic structural view of a landing gear according to an embodiment of the present application.

Fig. 9 is a schematic diagram of a first structure of a cable docking device according to an embodiment of the present application, where the cable docking mechanism is in a closed state.

Fig. 10 is an enlarged schematic view of a portion a of the cable docking device shown in fig. 9.

Fig. 11 is a schematic view of the cable docking device shown in fig. 9 after docking with an overhead line.

Fig. 12 is an enlarged schematic view of a portion B of the cable docking device shown in fig. 11.

Fig. 13 is a schematic view of a second structure of the cable docking device according to the embodiment of the present application, where the cable docking mechanism is in an open state.

Fig. 14 is an enlarged schematic view of a portion C of the cable docking device shown in fig. 13.

Fig. 15 is a schematic view of the cable docking device shown in fig. 13 when undocked from an overhead line.

Reference numerals illustrate:

1. an overhead line; 100. unmanned plane; 200. landing gear; 210. a platform; 211. a surrounding frame; 212. a first strut; 213. a second strut; 220. supporting feet; 230. a support rod; 300. a cable docking device; 310. a cable docking mechanism; 311. a mounting frame; 312. a driving member; 313. a multi-link structure; 3131. a rocker arm; 3132. a connecting rod; 3133. a waist-shaped hole; 314. a claw; 315. a limiting piece; 320. a buffer mechanism; 400. a maintenance device; 500. a photographing device; 510. a first camera; 520. a second camera; 531. a first bracket; 532. and a second bracket.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

The existing overhead line 1 strand breakage overhauling technology has the following problems: 1. because the overhead line 1 is high, if no obvious sagging phenomenon occurs during strand breakage, only the breakpoint is broken, and photos or unmanned aerial vehicle aerial pictures shot on the ground are often not clear enough, so that the strand breakage number of the overhead line 1 is difficult to intuitively and accurately evaluate; 2. at present, the most common mode of overhead line 1 strand breakage maintenance is that the maintenance is carried out by taking an operation frame manually, and the conventional overhead line 1 strand breakage maintenance work usually depends on manual judgment of the strand breakage number and whether the maintenance of an upper person is safe or not due to lack of accurate theoretical calculation, but when the situation that the strand breakage number is large is encountered, the safety of the maintenance work is difficult to judge accurately, and great potential safety hazards exist; 3. because the overhead line 1 is not well designed with secondary protection measures, in the current broken strand maintenance work of the overhead line 1, no secondary protection measures are basically arranged for overhead operators, and if the overhead line 1 breaks suddenly, the overhead operators can fall down directly, so that the personal safety cannot be guaranteed.

In order to improve the maintenance efficiency of the overhead line 1, effectively reduce personnel safety risks and avoid major safety hazards, the embodiment of the application provides an overhead line maintenance system, which can be applied to broken strand inspection and maintenance operation of the overhead line 1 (such as an overhead ground wire).

As shown in fig. 1 to 15, the overhead line overhaul system provided in the embodiment of the present application includes an unmanned aerial vehicle 100, a landing gear 200, a cable docking device 300, and a maintenance device 400, where the unmanned aerial vehicle 100 is used for flying along an overhead line 1; landing gear 200 is disposed at the bottom of the drone 100; the cable docking device 300 is arranged on the landing gear 200, and the cable docking device 300 is used for docking with the overhead line 1 in the air; the maintenance device 400 is disposed at the bottom of the unmanned aerial vehicle 100, and the maintenance device 400 is used for performing detailed inspection and maintenance on the overhead line 1 in a state where the cable docking device 300 is docked with the overhead line 1.

According to the overhead line overhaul system, after the cable docking device 300 mounted on the unmanned aerial vehicle 100 is docked with the overhead line 1 in the air, the unmanned aerial vehicle 100 can fly along the overhead line 1 and repair broken strand positions of the overhead line 1 through the repair device 400. Compared with the existing manual maintenance mode and the power transmission line robot maintenance mode, the overhead line maintenance system provided by the embodiment of the application does not need to perform manual overhead operation, is safer and more convenient, and effectively ensures personnel safety.

The unmanned aerial vehicle 100 includes a body structure, a power system, an avionics system, a power supply battery, a communication system, and the like, and the specific structure may refer to the prior art, which is not described herein. The unmanned aerial vehicle 100 serves as a flight platform, can carry the landing gear 200, the cable docking device 300 and the maintenance device 400 for flying in the air, and can perform the work of checking, maintenance and the like on the overhead line 1 after the overhead line maintenance system is docked with the overhead line 1 through the cable docking device 300.

The landing gear 200 is used to provide corresponding mounting locations for the unmanned aerial vehicle 100, the maintenance device 400, and the cable docking device 300, and can be used as a blade protection cover during the whole flight to prevent the unmanned aerial vehicle 100 from crashing due to damage caused by blade collision. Alternatively, landing gear 200 may be comprised of carbon tubing and carbon tubing connectors. It should be noted that the highest position of the landing gear 200 should be lower than the lowest position of the unmanned aerial vehicle 100 to avoid interfering with the normal rotation of the paddles of the unmanned aerial vehicle 100.

As shown in fig. 8, the landing gear 200 includes a platform 210 and a plurality of support legs 220, and the plurality of support legs 220 are installed at the bottom of the platform 210 and uniformly arranged along the circumferential direction of the platform 210; the top of platform 210 is provided with a plurality of bracing pieces 230, and the bottom of unmanned aerial vehicle 100 is connected on the top of bracing piece 230, and the setting of bracing piece 230 can ensure that the highest position of undercarriage 200 keeps suitable distance with the lowest position of unmanned aerial vehicle 100.

Optionally, the platform 210 includes an octagonal surrounding frame 211, a first supporting rod 212 and a second supporting rod 213, where the first supporting rod 212 and the second supporting rod 213 are both located in the surrounding frame 211, the first supporting rod 212 and the second supporting rod 213 are disposed in a crossing manner, and two ends of the first supporting rod 212 and the second supporting rod 213 are respectively connected with the surrounding frame 211, so that the platform 210 with the structure is more stable. Optionally, the number of the first supporting rods 212, the second supporting rods 213, the supporting legs 220 and the supporting rods 230 may be set according to actual requirements, which is not limited herein. As shown in fig. 8, the number of the supporting legs 220 and the supporting rods 230 is four, the number of the first supporting rods 212 and the second supporting rods 213 is two, and the first supporting rods 212 and the second supporting rods 213 are perpendicular to each other; the four support rods 230 are respectively disposed at four crossing points of the two first support rods 212 and the two second support rods 213, wherein one end of each of the two support legs 220 is connected to one of the first connecting rods and disposed at intervals, and one end of each of the other two support legs 220 is connected to the other first connecting rod and disposed at intervals.

As shown in fig. 9 to 15, the cable docking device 300 includes a cable docking mechanism 310, the cable docking mechanism 310 including a mounting frame 311 and two cable docking mechanisms respectively disposed at opposite sides of the mounting frame 311, each cable docking mechanism including a driving member 312, a multi-link structure 313 and a claw 314; the clamping jaw 314 is rotatably connected to the mounting frame 311, one end of the multi-link structure 313 is rotatably connected to the clamping jaw 314, the other end of the multi-link structure 313 is connected to the output end of the driving member 312, and the driving member 312 can drive the multi-link structure 313 to drive the clamping jaw 314 to rotate, so that the corresponding clamping jaw 314 is close to or far from the other clamping jaw 314. The driving member 312 may be a steering engine, a motor, or other driving member capable of driving the multi-link structure 313 to rotate.

Specifically, as shown in fig. 10-12, when the claws 314 of the two cable docking assemblies approach each other, the two claws 314 clamp the overhead line 1 together, so as to achieve docking with the overhead line 1, so that the unmanned aerial vehicle 100 can fly along the overhead line 1; as shown in conjunction with fig. 14 and 15, when the claws 314 of the two cable docking assemblies are moved away from each other, the two claws 314 release the overhead wire 1, thereby releasing the docking with the overhead wire 1. It should be noted that, when the claws 314 of the two cable docking assemblies are close to each other and are docked, the space between the two claws 314 is larger than the diameter of the overhead wire 1, so as to avoid the crash caused by locking with the overhead wire 1.

Optionally, the cable docking assembly further includes a torsion spring, the claw 314 is rotationally connected with the mounting frame 311 through the first rotating shaft, the torsion spring is sleeved on the first rotating shaft, and an acting force for enabling the claw 314 to rotate and reset can be provided through the torsion spring, so that the claw 314 can be in a tightening state when the two claws 314 clamp the overhead line 1, and the overhead line 1 is not easy to slide.

Optionally, the mounting frame 311 is provided with a channel, the claw 314 comprises a claw body and a connecting part, one end of the connecting part is connected with the claw 314, and the other end of the connecting part penetrates through the channel of the mounting frame 311 and is rotationally connected with the multi-connecting-rod structure 313; as shown in fig. 10 and 14, the cable docking assembly further includes a limiting member 315, where the limiting member 315 is disposed at one end of the connecting portion near the multi-link structure 313 and is located outside the channel, and the length of the limiting member 315 is greater than the width of the channel. Through setting up spacing piece 315, can restrict the rotation scope of jack catch 314, can keep predetermineeing the clearance when making two jack catches 314 be close to each other, even make two jack catches 314 not fully seal in order to form an opening, open-ended width is less than the diameter of overhead wire 1, when one of them driving piece 312 inefficacy, another driving piece 312 can normally drive corresponding jack catch 314 open and close to can normally dock with overhead wire 1 and release the butt joint, in order to guarantee cable docking mechanism 310 normal operating.

As shown in fig. 10 and 14, the multi-link structure 313 includes a rocker arm 3131 and a link 3132, a waist-shaped hole 3133 is provided at one end of the link 3132 connected to the rocker arm 3131, and the waist-shaped hole 3133 extends along the length direction of the link 3132; one end of the rocker arm 3131 is connected to the output end of the driving member 312, the other end of the rocker arm 3131 is rotatably connected to the link 3132 through the waist-shaped hole 3133, and the other end of the link 3132 is rotatably connected to the connecting portion of the claw 314. By providing the waist-shaped hole 3133 on the connecting rod 3132 and combining the limiting member 315, when the two driving members 312 fail at the same time, the two clamping jaws 314 can be given a releasing force by the overhead wire 1 when the unmanned aerial vehicle 100 climbs vertically, so that the overhead wire 1 can be safely released from the cable docking mechanism 310 in an emergency state.

Specifically, as shown in fig. 10 and 12, when the cable docking mechanism 310 is in the closed state, the two claws 314 are in the non-closed state, and the width of the opening is smaller than the diameter of the overhead wire 1, so that the overhead wire 1 does not come out of the two claws 314. When the corresponding claw 314 cannot be opened due to the failure of the driving member 312 on one side, the driving member 312 on the other side can normally drive the corresponding claw 314 to be opened and closed, and the normal operation of the whole cable docking mechanism 310 can be ensured. In the case that the driving members 312 at both sides fail at the same time, when the cable docking mechanism 310 is to be disconnected from the overhead wire 1 (i.e., undocked), since the two claws 314 are in an unsealed state, the overhead wire 1 can be ensured to be safely disconnected from the cable docking mechanism 310 in an emergency state by controlling the unmanned aerial vehicle 100 to vertically climb so that the overhead wire 1 gives one of the two claws 314 a releasing force.

As shown in connection with fig. 6, 7, 10 and 14, in some embodiments of the present application, the cable docking device 300 further includes two buffer mechanisms 320 disposed on opposite sides of the mounting frame 311, and the buffer mechanisms 320 rotatably connect the landing gear 200 and the mounting frame 311, respectively. The buffer mechanism 320 has a telescopic capability, and has a certain buffer capability when the cable docking mechanism 310 is docked with the overhead wire 1 and locked. Specifically, as shown in fig. 9 and 13, two ends of one buffer mechanism 320 are respectively connected to one side of the landing gear 200 by rotating the supporting leg 220 and one side of the mounting frame 311, and two ends of the other buffer mechanism 320 are respectively connected to the supporting leg 220 and the other side of the mounting frame 311 on the other side of the landing gear 200 by rotating, the cable docking mechanism 310 and the buffer mechanisms 320 on both sides together form a V-shaped structure, so that the whole cable docking mechanism 310 is connected to the landing gear 200 through the two buffer mechanisms 320.

In some embodiments of the present application, the overhead line inspection system further includes a photographing device 500, the photographing device 500 being disposed on the cable docking device 300, the photographing device 500 being used to photograph the claw 314 and the overhead line 1. It can be appreciated that in the process of docking the cable docking structure 310 with the overhead wire, the claw 314 and the overhead wire 1 can be photographed by the photographing device 500, so that a ground person observes the whole docking process, and further controls and manipulates the flight of the unmanned aerial vehicle 100 to adjust the relative position of the cable docking structure 310 and the overhead wire 1 until the docking is completed; when the cable docking mechanism 310 is successfully docked with the overhead line 1, the overhead line 1 can be closely inspected by the photographing device 500 during the flying process of the unmanned aerial vehicle 100 along the overhead line 1, and when the problem of strand breakage at a certain position of the overhead line 1 is found, the maintenance device 400 can be used for performing maintenance operation on the strand breakage position. Compared with the existing overhead line inspection technology such as manual ground observation, manual on-line inspection and aerial inspection shooting of the unmanned aerial vehicle 100, the overhead line maintenance system provided by the embodiment of the application can realize close-range inspection, so that judgment on the broken strand position of the overhead line 1 is more accurate and reliable.

As shown in fig. 9-15, the photographing device 500 includes a first camera 510 and a second camera 520, the first camera 510 is disposed at the top of the mounting frame 311, the second camera 520 is disposed at one side of the cable docking mechanism 310, and lenses of the first camera 510 and the second camera 520 face the claw 314. Specifically, the second camera 520 is mounted on one of the buffer mechanisms 320. Wherein, the ground operator can look down at the cable docking mechanism 310 and the position of the overhead line 1 in the left-right direction through the first camera 510; the ground operator can observe the cable docking mechanism 310 and the position of the overhead line 1 in the height direction from one side through the second camera 520, so that the observation is more comprehensive to improve the docking efficiency, and meanwhile, the shooting effect on the overhead line 1 is clearer and more reliable.

Specifically, as shown in fig. 9 and 13, the first camera 510 is mounted on the top of the mounting frame 311 by the first bracket 531, and can look down the cable docking mechanism 310, the overhead line 1 and the whole docking process from top to bottom; the second camera 520 is mounted on the buffer mechanism 320 at one side through the second bracket 532, and the cable docking mechanism 310, the overhead wire 1, and the entire docking process can be observed from one side.

When the cable docking mechanism 310 is docked with the overhead line 1, the two claws 314 are driven away from each other by the two driving pieces 312 to open the two claws 314; the two claws 314 of the cable docking mechanism 310 and the overhead wire 1 are observed through the first camera 510 and the second camera 520, the positions of the unmanned aerial vehicle 100 in the left-right direction and the height direction are adjusted until the overhead wire 1 is clamped into the space between the two claws 314, and then the two driving pieces 312 are controlled to respectively drive the two claws 314 to be close to each other so as to close the two claws 314, so that the docking task is completed.

Optionally, the maintenance device 400 may include a mounting bracket, two mechanical arms and a control unit, where the two mechanical arms are inserted into the landing gear 200, and the mechanical arms are provided with a camera, so that detailed contact inspection and maintenance operation can be performed on the overhead line 1, and the specific structure of the maintenance device 400 may refer to the prior art, which is not described in detail herein.

The working principle of the overhead line overhaul system provided by the embodiment of the application is as follows:

when overhauling, after a ground person controls the unmanned aerial vehicle 100 to fly above an overhead ground wire, the unmanned aerial vehicle 100 is controlled to enable the cable docking mechanism 310 to dock with the overhead wire 1 in the air, and after the cable docking device 300 of the cable docking mechanism 310 and the overhead wire 1 are successfully docked in the air, the unmanned aerial vehicle 100 can fly along the overhead wire 1 and can be unfolded and patrolled through the shooting device 500; if the overhead line 1 is found to have a broken strand risk point in the inspection process, the maintenance device 400 mounted on the unmanned aerial vehicle 100 can be used for detailed contact inspection and broken strand maintenance.

In summary, the overhead line overhaul system provided by the embodiment of the application has the following advantages:

1. the current unmanned aerial vehicle 100 inspection mode can only shoot through the camera outside 5 meters ~ 10 meters distance, and the picture of shooing is not clear enough, and the overhead line inspection system that this application embodiment provided uses unmanned aerial vehicle 100 direct with 1 butt joint of overhead line, can patrol and examine and maintenance work closely, shooting effect is better, and is more accurate reliable to the judgement of 1 broken strands department of overhead line.

2. Compared with the existing manual maintenance mode, the overhead line maintenance system provided by the embodiment of the application does not need to perform manual overhead operation, is high in automation degree and low in risk, and has a maintenance effect which is not inferior to that of the manual maintenance mode.

3. Compared with the maintenance mode of the transmission line robot, the overhead line maintenance system provided by the application embodiment has the advantages of good mobility, wide operation range, no need of normal residence, low cost and no need of manual overhead installation of the transmission line robot.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

In the description of the present application, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first," "second," etc. may explicitly or implicitly include one or more features.

The overhead line overhaul system provided by the embodiment of the present application is described in detail, and specific examples are applied to illustrate the principles and embodiments of the present application, and the description of the above embodiments is only used for helping to understand the method and core ideas of the present application; meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the ideas of the present application, the contents of the present specification should not be construed as limiting the present application in summary.

Claims

1. An overhead line inspection system, comprising:

an unmanned aerial vehicle (100) for flying along an overhead line (1);

-a landing gear (200), the landing gear (200) being arranged at the bottom of the unmanned aerial vehicle (100);

a cable docking device (300), the cable docking device (300) being arranged on the landing gear (200), the cable docking device (300) being for docking with the overhead line (1) in the air; the maintenance device (400), the maintenance device (400) sets up the bottom of unmanned aerial vehicle (100), maintenance device (400) are used for in cable interfacing device (300) with under the state of overhead wire (1) butt joint to overhead wire (1) maintenance.

2. The overhead line inspection system according to claim 1, wherein the cable docking device (300) comprises a cable docking mechanism (310), the cable docking mechanism (310) comprising a mounting bracket (311) and two cable docking assemblies disposed on opposite sides of the mounting bracket (311), respectively, the cable docking assemblies comprising a driver (312), a multi-link structure (313) and a pawl (314);

the claw (314) is rotationally connected to the mounting frame (311), one end of the multi-link structure (313) is rotationally connected to the claw (314), the other end of the multi-link structure (313) is connected to the output end of the driving piece (312), and the driving piece (312) can drive the multi-link structure (313) to drive the claw (314) to rotate so that the corresponding claw (314) is close to or far away from the other claw (314).

3. The overhead line inspection system according to claim 2, wherein the cable docking assembly further comprises a torsion spring, the claw (314) is rotatably connected to the mounting frame (311) through a first rotating shaft, and the torsion spring is sleeved on the first rotating shaft.

4. Overhead line inspection system according to claim 2, characterized in that the mounting frame (311) is provided with a channel, the claw (314) comprises a claw body and a connecting part, one end of the connecting part is connected with the claw (314), and the other end of the connecting part passes through the channel to be rotationally connected with the multi-link structure (313);

the cable docking assembly further comprises a limiting piece (315), the limiting piece (315) is arranged at one end, close to the multi-connecting-rod structure (313), of the connecting portion and located outside the channel, and the length of the limiting piece (315) is larger than the width of the channel.

5. The overhead line inspection system according to claim 4, wherein the multi-link structure (313) includes a rocker arm (3131) and a link (3132), a waist-shaped hole (3133) is provided at an end of the link (3132) connected to the rocker arm (3131), and the waist-shaped hole (3133) extends in a length direction of the link (3132);

one end of the rocker arm (3131) is connected with the output end of the driving piece (312), the other end of the rocker arm (3131) is rotationally connected with the connecting rod (3132) through the waist-shaped hole (3133), and the other end of the connecting rod (3132) is rotationally connected with the connecting part.

6. The overhead line inspection system according to any one of claims 2 to 5, further comprising a camera (500), the camera (500) being arranged on the cable docking device (300), the camera (500) being adapted to take a picture of the jaw (314) and the overhead line (1).

7. The overhead line inspection system according to claim 6, wherein the photographing device (500) comprises a first camera (510) and a second camera (520), the first camera (510) is disposed at the top of the mounting frame (311), the second camera (520) is disposed at one side of the cable docking mechanism (310), and lenses of the first camera (510) and the second camera (520) are both directed toward the claw (314).

8. The overhead line inspection system according to claim 7, wherein the cable docking device (300) further comprises two buffer mechanisms (320) respectively disposed on two opposite sides of the mounting frame (311), the buffer mechanisms (320) respectively rotatably connect the landing gear (200) and the mounting frame (311), and the second camera (520) is mounted on one of the buffer mechanisms (320).

9. The overhead line inspection system according to claim 1, wherein the landing gear (200) includes a platform (210) and a plurality of support legs (220), the plurality of support legs (220) being mounted at a bottom of the platform (210) and being uniformly arranged along a circumferential direction of the platform (210); the top of platform (210) is provided with a plurality of bracing pieces (230), the top of bracing piece (230) is connected the bottom of unmanned aerial vehicle (100).

10. The overhead line inspection system according to claim 9, wherein the platform (210) comprises an octagonal enclosure frame (211), a first support rod (212) and a second support rod (213), the first support rod (212) and the second support rod (213) are both located in the enclosure frame (211), and the first support rod (212) and the second support rod (213) are arranged in a crossing manner and are connected to the enclosure frame (211) at two ends respectively.