Method for overhead line maintenance work with a combination of a lifting device and a transverse walking device

Abstract

The present application relates to overhead line maintenance operation technical field, propose a kind of overhead line maintenance operation method of combination of lifting device and transverse walking device, the present application is operated on wire, only need to cooperate with unmanned aerial vehicle, unmanned aerial vehicle is operated by ground operating personnel, drop 1 traction rope, ground operating personnel tie static rope and personal anti-falling backup protection rope for lifting device on transverse walking device, ground operating personnel hang transverse walking device on wire using traction rope, install lifting device again, equipotential operating personnel fasten safety belt, sit on lifting device, reach upper line position by oneself operation device, use transverse walking device again, enter live line defect position and carry out work, expand the application range of lifting device, so that maintenance operation in large span distance area can also realize accurate positioning, reduce the demand of operating personnel carrying soft ladder and other physical intensive equipment, reduce the physical burden of staff in high-altitude operation.

Description

Technical Field

[0001] This invention relates to the field of overhead line maintenance technology, and in particular to an overhead line maintenance method that combines a lifting device and a lateral travel device. Background Technology

[0002] Currently, during the processes of overhead line maintenance, replacement of spacers, replacement of vibration dampers, and repair of conductors, workers often need to climb towers and conductors to perform high-altitude operations. The average height of high-voltage transmission line towers is generally over 20 meters. The company requires workers to comply with various safety regulations during high-altitude maintenance, such as the requirement that they cannot lose their safety belts when climbing towers. This adds extra physical exertion to the workers and poses certain safety hazards.

[0003] When entering an electric field, methods such as climbing rope ladders, riding suspended railings, walking along insulator strings, and walking along horizontal ladders have been consistently used. Each of these methods has its own advantages and disadvantages in practical application.

[0004] Entering the electric field via an insulated rope ladder is suitable for live-line work on 110kV and above transmission lines, applicable to both straight-line and tension towers. Features: Simple to learn, but requires workers to climb, demands high physical fitness, and involves significant labor intensity.

[0005] Entering the electric field by riding a suspended platform is a method suitable for entering the electric field from straight-line towers of 500kV and above lines. Its characteristics are: 1. At least two people are required to install the platform, and the location of the anchor points on the control rope should be reasonably selected. 2. The equipotential electrician needs to climb onto the tower to sit on the platform, and at least two people are needed to work together to lower the worker down. 3. When entering the electric field on the platform, the equipotential electrician should keep their body as close to the platform (basket) as possible to reduce the effective safe distance occupied by the body in the electric field. 4. During the process of entering the electric field using the platform method, the worker must not lose the protection of the backup safety rope behind them, and the anchor points on the backup safety rope should be reasonably selected according to the actual situation.

[0006] Entering the electric field along the insulator string is a method generally applicable to 220kV and above lines. However, in actual operation, the number of good insulator discs and the combination gap of the 220kV line should be fully considered to determine whether this method should be adopted. Features: Simple and easy to learn, no external climbing tools required;

[0007] Entering the electric field via a horizontal ladder is a method suitable for straight-line and tension towers of 110kV and above lines. It is particularly suitable for 110-220kV lines (some 500kV tower types can be used as a reference). Features: Stable potential gain, but transportation and installation are difficult.

[0008] The Gansu Provincial Electric Power Company of the State Grid Corporation of China has developed a combined live-line working method using drones and electric lifting devices. The principle involves the drone first dropping a traction rope onto the conductor of the working phase. Ground personnel then use the traction rope to guide the semi-static rope of the lifting device across the conductor. The ground personnel install the lifting device on the semi-static rope. An equipotential worker, secured by a full-body safety harness, is suspended below the lifting device (the worker is suspended throughout the ascent and descent). Carrying an insulated ladder, the worker operates the lifting device to reach the vicinity of the conductor. After transferring the potential, the rigid insulated ladder head is attached to the conductor. The equipotential worker then climbs the rigid ladder head onto the conductor to begin the work. This method is physically demanding and requires high skill levels from the equipotential worker. Furthermore, the worker cannot move on the conductor, limiting its effectiveness. Given the current skill level of personnel in live-line working teams, one-third of them find this method difficult to use. Therefore, it has not been widely adopted within the Southern Power Grid system.

[0009] Given the many limitations of traditional working methods, there is an urgent need for a new high-altitude work solution to improve the convenience and safety of workers, maximize the advantages of aerial work platforms, optimize maintenance processes, and enhance overall work efficiency. Summary of the Invention

[0010] One object of the present invention is to provide a lifting device that combines a traction rope and is electrically operated for lifting, which can effectively reduce the physical exertion of workers during climbing.

[0011] Another object of the present invention is to provide a lateral travel device capable of moving laterally along a guide rail and equipped with a deceleration device, which can accurately locate the maintenance work position.

[0012] Another objective of this invention is to provide an overhead line maintenance method that combines a lifting device and a lateral walking device, which is easy to operate, highly efficient, and saves the physical energy of workers.

[0013] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0014] A lifting device, comprising a triangular balance support, an insulated anti-rope wear reduction mechanism, an explosion-proof lithium battery with an aluminum alloy shell, a descent speed control mechanism, and a backrest combination adjustable chair;

[0015] The triangular balance support is located at the bottom of the high-altitude operation lifting device of the power transmission line and is detachably connected to the insulating anti-rope wear reduction mechanism.

[0016] The insulating anti-rope wear reduction mechanism is powered by an explosion-proof lithium battery with an aluminum alloy shell fixed on one side, and can rotate to wind the insulating rope. The other side of the insulating anti-rope wear reduction mechanism is equipped with a descent speed control mechanism.

[0017] The descent speed control mechanism is connected to the insulating anti-rope wear reduction mechanism, and the descent speed can be controlled through the insulating anti-rope wear reduction mechanism.

[0018] The adjustable backrest chair is located at the top of the high-altitude operation lifting device for the power transmission line. Its bottom sides are fixedly connected to the descent speed control mechanism and the explosion-proof lithium battery with an aluminum alloy shell, respectively, and its front end is fixedly installed.

[0019] The insulated rope wear-resistant deceleration mechanism includes a rope clamping assembly, a wire blocking assembly, an insulated rope reel, a gearbox, and a brushless motor.

[0020] A lateral walking device includes: a left and a right bracket connected to a guide wire at their upper ends; several connecting crossbars connected at one end to the left bracket and at the other end to the right bracket; a drive device located on the front side of the right bracket; a deceleration device located inside the left or right bracket; and a rope threader detachably connected to the connecting crossbars. The bottom of the rope threader is connected to a high-altitude lifting device. The bottom of the deceleration device abuts against the guide wire. The upper ends of the left and right brackets are provided with inverted U-shaped hooks. An auxiliary wheel is rotatably connected to the top of the inverted U-shaped hook on the left bracket, and a traveling wheel is rotatably connected to the top of the inverted U-shaped hook on the right bracket. The auxiliary wheel and the traveling wheel are positioned above the guide wire. The traveling wheel is sleeved on the right bracket via a third rotating shaft, which is rotatably connected to the right bracket. The traveling wheel is fixedly connected to the third rotating shaft, and one end of the third rotating shaft extends out from the front side of the right bracket.

[0021] The drive device includes: a fifth connecting shaft with one end sleeved on the front side of the right bracket, a drive pulley coaxially fixedly connected to the other end of the fifth connecting shaft, an electric wrench connector coaxially fixedly connected to the drive pulley, a driven pulley fixedly connected to one end of the third rotating shaft, and a transmission belt sleeved on the drive pulley and the driven pulley. The fifth connecting shaft and the right bracket can rotate relative to each other.

[0022] Preferably, the left bracket is connected to the auxiliary wheel via a first rotating shaft, and a bearing is provided between the first rotating shaft and the auxiliary wheel. The bottom of the inverted U-shaped hook of the left bracket is rotatably connected to a first stop bar via a second rotating shaft. The top of the first stop bar contacts the inner side of the inverted U-shaped hook of the left bracket, and a first spring is provided between the inner side of the first stop bar and the left bracket.

[0023] Preferably, a bearing is provided between the right bracket and the third rotating shaft, a fixing key is provided between the traveling wheel and the third rotating shaft, and a second stop bar is rotatably connected to the bottom of the inverted U-shaped hook of the right bracket through a fourth rotating shaft. The top of the second stop bar contacts the inner side of the inverted U-shaped hook of the right bracket, and a second spring is provided between the inner side of the second stop bar and the right bracket.

[0024] Preferably, the bottom front side of the right bracket is provided with a limiting groove, and several connecting holes are provided on both sides of the limiting groove. An adjusting block is slidably connected in the limiting groove. The adjusting block is sleeved on the end of the fifth connecting shaft away from the drive pulley. A bearing is provided between the adjusting block and the fifth connecting shaft. The adjusting block is provided with a limiting protrusion that matches the limiting groove. The limiting protrusion is provided with a waist-shaped hole on both sides. The top of the adjusting block is provided with a through hole, and a limiting bolt is provided in the through hole.

[0025] Preferably, the drive unit has a protective shell on the front side, and the protective shell is detachably connected to the right bracket.

[0026] Preferably, the deceleration device includes: a connecting block fixedly connected to the inner side of the left or right bracket, a screw sleeved with the connecting block, both ends of the screw protruding from the connecting block, a pressure block fixedly connected to one end of the screw, a rotating handle fixedly connected to the unloaded end of the screw, an internal thread matching the external thread of the screw provided at the sleeve location of the connecting block and the screw, and an anti-slip pad provided at the bottom of the pressure block.

[0027] Preferably, the rope threader has a receiving groove on the front side, a guide wheel on the top of the receiving groove, a safety bar in front of the guide wheel, and several hooks on the front and rear sides of the rope threader.

[0028] Preferably, the bottom of the left and right hanging brackets are provided with extension sections, one end of the connecting crossbar is connected to the extension section of the left hanging bracket and the other end is connected to the extension section of the right hanging bracket.

[0029] A method for maintaining overhead power lines that combines a lifting device with a lateral travel device includes the following steps:

[0030] S1. Deploy the traction rope. Based on the rope length of the work team, select the location where the rope needs to be deployed and use a drone to deploy the traction rope.

[0031] S2. Install the lateral travel device, attach the traction rope to the lateral travel device, and activate the deceleration device of the lateral travel device; attach the high-strength static rope for the lifting device and the fall protection backup rope for the equipotential workers to the lateral travel device; the ground workers operate the traction rope to hang the lateral travel device on the conductor.

[0032] S3. Install the lifting device and check whether the appearance and components of the lifting device are normal; the ground workers connect the rope threader to the lifting device, pass the static rope through the rope threader, and connect the static rope to the rope clamping assembly in the insulated rope anti-wear deceleration mechanism of the lifting device.

[0033] S4. When equipotential workers enter the electric field, they should wear a full set of qualified shielding clothing, sit in a chair, and fasten the fall protection rope. They should then sit on the lifting device and operate the lifting device to enter the electric field.

[0034] S5. Enter the location of the fault on the live line and carry out the work. Connect the rope threader to the connecting crossbar of the lateral travel device, close the deceleration device of the lateral travel device, and use the lateral travel device to drive the lifting device and the workers to move laterally along the conductor to enter the location of the fault on the live line. Open the deceleration device of the lateral travel device, lock the lateral travel device, and carry out the overhead line maintenance work.

[0035] S6. Exit the faulty location of the live line. After the overhead line maintenance work is completed, turn off the deceleration device of the lateral travel device. Use the lateral travel device to drive the lifting device and the workers to move laterally along the conductor back to the lower line position. Turn on the deceleration device of the lateral travel device.

[0036] S7. After the equipotential work personnel leave the electric field, check that there are no leftover items, check the connection of each point of the shielding suit, and report to the work supervisor after confirming that the connection is secure. After receiving the permission order, use the potential transfer rod to transfer the potential, leave the electric field, and operate the lifting device to return to the ground.

[0037] S8. Remove work tools and clean up the work site. Ground workers remove the lateral walking device hanging on the guide wire, lower it to the ground with a traction rope, clean up the work site, and the work is completed.

[0038] Preferably, the deployment of the traction rope by the drone in step S1 includes the following steps:

[0039] a. Setting up drones: Set up an observation line 10m away from the vertical projection of the side phase conductor; set up a landing pad and a moisture-proof mat in parallel around the 10m observation line; set up drones on the landing pad; arrange insulated traction ropes in an S-shape on the moisture-proof mat; connect one end of the insulated traction rope to a plumb bob; and connect the plumb bob to the drone's drag hook device.

[0040] b. Inspect the drone: The operator checks and confirms that the drone's airframe structure, the remote controller's battery level, the data transmission facilities between the drone and the remote controller, and the status of the drag link are all normal;

[0041] c. Drone Rope Throwing: The operator checks the wind speed. If the wind speed is ≤5m / s, which meets the requirements for drone flight, the drone throws the rope. The drone operator takes off vertically with the drone carrying the plumb bob and the traction rope. After reaching a height of twice the distance between the conductor and the ground, the operator flies the drone horizontally towards the inside of the line, maintaining a constant vertical distance from the ground. The observer stands on the ground between the side phase conductor and the ground wire to observe. When the drone reaches the distance between the side phase conductor and the ground wire, the operator remotely opens the drag device, causing the plumb bob carrying the traction rope to fall vertically to the ground. The drone returns along the same path and lands back on the helipad. After the drone lands, ensure that the remote controller is locked. First, disconnect all power supplies to the drone, and then disconnect the power to the remote controller.

[0042] Preferably, in step S2, after the lateral walking device is hung on the guide wire, two workers conduct an impact test to confirm whether it is securely attached.

[0043] Preferably, in step S4, the equipotential worker operates the lifting device and pauses when it is 1m above the ground. Two ground workers conduct an impact test on the lifting device and backup protection. After confirming that the impact test is qualified, the equipotential worker operates the lifting device to rise to 0.5m away from the conductor and pauses. The worker then checks the connection points of the shielding suit again and confirms that the connection is secure. The worker reports to the work supervisor and, after receiving permission, uses a potential transfer rod to complete the potential transfer. The worker then continues to operate the lifting device to raise the personnel to the work position for maintenance work.

[0044] Preferably, in step S4, a fall arrestor is installed on the safety rope, and the equipotential worker, wearing a full set of qualified protective clothing, sits on a chair and connects the fall arrestor.

[0045] Preferably, in step S4, during the lifting process of the lifting device, tools or materials can be lifted together within the safe load limit of the lifting device.

[0046] Preferably, in step S3, the components of the lifting device are checked for normal operation, the power supply of the electric device is turned on, the power is checked and confirmed to be sufficient, and the raising and lowering functions of the electric device are checked and confirmed to be normal.

[0047] This invention discloses a method for overhead line maintenance combining a lifting device and a lateral travel device, which has the following beneficial effects. This invention allows for work on the conductor, requiring only cooperation with a drone. Ground personnel operate the drone, deploying a traction rope. The ground personnel attach the static rope for the lifting device and a backup fall protection rope to the lateral travel device. The ground personnel then use the traction rope to attach the lateral travel device to the conductor, and finally install the lifting device and static rope. The equipotential worker, secured with a safety belt and backup safety rope, sits on the lifting device and operates it to reach the overhead position. The lateral travel device is then used to access the fault location on the live line to carry out the work. This expands the application range of the lifting device, enabling precise positioning even in maintenance work across large spans. It reduces the need for workers to carry rope ladders or use physically demanding equipment such as gantry cranes, thus reducing the physical burden on workers during high-altitude operations and minimizing the need for dangerous actions (such as self-propelled line walking or using rope ladders), thereby increasing the safety of high-altitude work. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of the overall structure of the lateral walking device of the present invention.

[0049] Figure 2 This is a schematic diagram of the lateral walking device of the present invention after the protective shell has been removed.

[0050] Figure 3 This is another structural diagram of the lateral walking device of the present invention after the protective shell has been removed.

[0051] Figure 4 This is a right-side view of the lateral walking device of the present invention after the protective shell has been removed.

[0052] Figure 5 This is a front view of the lateral walking device of the present invention after the protective shell has been removed.

[0053] Figure 6 for Figure 5 A schematic diagram of the cross-sectional structure of section AA.

[0054] Figure 7 This is a schematic diagram of the adjustment block structure of the lateral walking device of the present invention.

[0055] Figure 8 This is a schematic diagram showing the connection between the lateral walking device and the lifting device of the present invention on the guide wire.

[0056] Figure 9 This is another schematic diagram showing the connection between the lateral walking device and the lifting device of the present invention on the guide wire.

[0057] Figure 10This is a flowchart of the overhead line maintenance operation method combining the lifting device and the lateral travel device of the present invention.

[0058] In the attached diagram: 1. Left bracket; 11. Auxiliary wheel; 12. First pivot; 13. First stop lever; 14. Second pivot; 15. First spring; 2. Right bracket; 21. Traveling wheel; 22. Third pivot; 23. Second stop lever; 24. Fourth pivot; 25. Second spring; 26. Limiting groove; 27. Connecting hole; 28. Fixing key; 3. Connecting crossbar; 4. Drive unit; 41. Adjusting block; 411. Oblong hole; 412. Through hole; 413. Limiting protrusion; 42. Fifth connecting shaft; 43. Drive pulley; 44. Electric wrench connector; 45. Driven pulley; 46. Drive belt; 47. 48. Connecting sleeve; 5. Limiting bolt; 6. Protective shell; 7. Reduction device; 8. Connecting block; 9. Screw; 10. Rotating handle; 11. Pressure block; 12. Anti-slip pad; 13. Rope threader; 24. Receiving groove; 35. Hook; 46. Guide wheel; 57. Safety bar; 68. Static rope; A1. Triangular balance bracket; A2. Insulated anti-rope wear reduction mechanism; A3. Aluminum alloy shell explosion-proof lithium battery; A4. Descent speed control mechanism; A5. Backrest combination adjustment chair; A16. Rope clamping assembly; A17. Rope blocking assembly; A18. Insulated rope reel; A19. Gearbox; A10. Brushless motor. Detailed Implementation

[0059] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0060] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0061] Example 1

[0062] Reference Figures 1 to 6A lateral walking device includes: a left bracket 1 and a right bracket 2, the upper ends of which are engaged with the top of a guide wire; a plurality of connecting crossbars 3, one end of which is bolted to the left bracket 1 and the other end of which is bolted to the right bracket 2; a drive device 4 located on the front side of the right bracket 2; a deceleration device 6 located inside the left bracket 1 or the right bracket 2; and a rope threader 7 engaged with the connecting crossbars 3. In this embodiment, there are two connecting crossbars 3, the deceleration device 6 is located inside the right bracket 2, and the bottom of the rope threader 7 is connected to the high-altitude lifting device; the bottom of the deceleration device 6 abuts against the guide wire; the left bracket... 1. The upper end of the right bracket 2 is provided with an inverted U-shaped hook 72. The top of the inverted U-shaped hook 72 of the left bracket 1 is rotatably connected to an auxiliary wheel 11, which can rotate relative to the wire. The top of the inverted U-shaped hook 72 of the right bracket 2 is rotatably connected to a traveling wheel 21, which can rotate relative to the wire. The auxiliary wheel 11 and the traveling wheel 21 are placed above the wire. The traveling wheel 21 is sleeved on the right bracket 2 through a third rotating shaft 22. The third rotating shaft 22 is rotatably connected to the right bracket 2, and the traveling wheel 21 is fixedly connected to the third rotating shaft 22. One end of the third rotating shaft 22 extends out of the front side of the right bracket 2.

[0063] Preferably, the left bracket 1 is connected to the auxiliary wheel 11 via the first rotating shaft 12. A bearing is provided between the first rotating shaft 12 and the auxiliary wheel 11. The bottom of the inverted U-shaped hook 72 of the left bracket 1 is rotatably connected to the first stop bar 13 via the second rotating shaft 14. The top of the first stop bar 13 contacts the inner side of the inverted U-shaped hook 72 of the left bracket 1. A first spring 15 (not shown in the figure) is provided between the inner side of the first stop bar 13 and the left bracket 1. The first stop bar 13 contacts the inner side of the inverted U-shaped hook 72 of the left bracket 1 under the push of the spring, preventing the wire from detaching from the left bracket 1.

[0064] A bearing is provided between the right bracket 2 and the third rotating shaft 22, and a fixing key 28 is provided between the traveling wheel 21 and the third rotating shaft 22 to ensure that there is no relative rotation between the third rotating shaft 22 and the traveling wheel 21. The bottom of the inverted U-shaped hook 72 of the right bracket 2 is rotatably connected to the second stop 23 through the fourth rotating shaft 24. The top of the second stop 23 contacts the inner side of the inverted U-shaped hook 72 of the right bracket 2. A second spring 25 is provided between the inner side of the second stop 23 and the right bracket 2. The second stop 23 contacts the inner side of the inverted U-shaped hook 72 of the right bracket 2 under the push of the spring to prevent the wire from detaching from the right bracket 2.

[0065] The bottom of the left bracket 1 and the right bracket 2 are provided with extension sections, one end of the connecting crossbar 3 is connected to the extension section of the left bracket 1 and the other end is connected to the extension section of the right bracket 2.

[0066] The left hanging bracket 1, the right hanging bracket 2, and the rope threader 7 are equipped with several weight-reducing grooves. The left hanging bracket 1 and the right hanging bracket 2 are not distinguishable as left and right. Since most people are right-handed, the hanging bracket with the drive device 4 is located on the right side for easy use with an electric wrench.

[0067] The left hanging bracket 1, the right hanging bracket 2, and the rope threader 7 are equipped with several weight-reducing grooves. It is worth noting that the left hanging bracket 1 and the right hanging bracket 2 are not distinguished by left and right. Since most people are right-handed, the hanging bracket with the drive device 4 is located on the right side for easy use of an electric wrench.

[0068] Please refer to Figure 6 The drive unit 4 includes: a fifth connecting shaft 42 with one end sleeved on the front side of the right bracket 2; a drive pulley 43 coaxially fixedly connected to the other end of the fifth connecting shaft 42; an electric wrench connector 44 coaxially fixedly connected to the drive pulley 43; a driven pulley 45 fixedly connected to one end of the third rotating shaft 22; and a transmission belt 46 sleeved on the drive pulley 43 and the driven pulley 45. The fifth connecting shaft 42 and the right bracket 2 are rotatable relative to each other. Two bearings are provided at the position where the fifth connecting shaft 42 and the right bracket 2 are sleeved. The electric wrench connector 44 is fixedly connected to the fifth connecting shaft 42 through a connecting sleeve 47. The electric wrench connector 44 is driven by an electric wrench, which drives the fifth connecting shaft 42 to rotate, thereby driving the drive pulley 43 to rotate, which in turn drives the transmission belt 46 to rotate, thereby driving the driven pulley 45 to rotate, which in turn drives the third rotating shaft 22 to rotate, thereby driving the traveling wheel 21 to rotate relative to the guide wire, thereby driving the entire device to move laterally along the guide wire.

[0069] This embodiment features several connecting crossbars 3 between the left hanger 1 and the right hanger 2. Detachable rope threaders 7 are mounted on these crossbars 3, connecting to the aerial work platform. A drive unit 4, powered by an electric wrench, is installed on the right hanger 2. This drive unit 4 rotates the traveling wheels 21 on the right hanger 2, causing the entire device to move laterally along the guide wire. Furthermore, a deceleration device 6 is included; when deceleration is needed, the pressure block 64 rubs against the guide wire to achieve braking. This expands the application range of the aerial work platform, enabling precise positioning during maintenance operations in areas with large span distances.

[0070] Please refer to Figure 3 , Figure 4 , Figure 6 and Figure 7The bottom front side of the right bracket 2 is provided with a limiting groove 26. Three connecting holes 27 are provided on both sides of the limiting groove 26. An adjusting block 41 is slidably connected in the limiting groove 26. The adjusting block 41 is sleeved on the end of the fifth connecting shaft 42 away from the driving pulley 43. A bearing is provided between the adjusting block 41 and the fifth connecting shaft 42. The adjusting block 41 is provided with a limiting protrusion 413 that matches the limiting groove 26. The limiting protrusion 413 is provided with a waist-shaped hole 411 on both sides. The top of the adjusting block 41 is provided with a through hole 412. A limiting bolt 48 is provided in the through hole 412. By first connecting the fifth connecting shaft 42 to the adjusting block 41, and then slidably connecting the adjusting block 41 to the bottom front side of the right bracket 2, the distance between the driving pulley 43 and the driven pulley 45 can be adjusted within a certain range. This can prevent relative slippage between the transmission belt 46 and the driving pulley 43 and the driven pulley 45 even after the transmission belt 46 is stretched, thus better ensuring the driving effect. The front of the drive unit 4 is provided with a protective shell 5, which is detachably connected to the right bracket 2 to prevent the drive unit 4 from injuring people.

[0071] Please refer to Figure 2 The deceleration device 6 includes: a connecting block 61 fixedly connected to the inner side of the left bracket 1 or the right bracket 2; a screw 62 sleeved on the connecting block 61; both ends of the screw 62 protruding from the connecting block 61; a pressure block 64 fixedly connected to one end of the screw 62; and a rotating handle 63 fixedly connected to the unloaded end of the screw 62. The connection point where the connecting block 61 and the screw 62 are sleeved has an internal thread matching the external thread of the screw 62. An anti-slip pad 65 is provided at the bottom of the pressure block 64, which prevents the deceleration mechanism from failing and avoids damage to the wires. By turning the rotating handle 63, the screw 62 rotates, causing the pressure block 64 to move up and down, pressing or releasing the wires. After the device moves laterally to a suitable position, it is fixed in that position by the deceleration mechanism to prevent movement.

[0072] Please refer to Figure 1 The rope threader 7 has a receiving groove 71 on the front side, a guide wheel 73 on the top of the receiving groove 71, and a safety bar 74 in front of the guide wheel 73. The rope threader 7 has two hooks 72 on the front and rear sides. One end of the static rope 8 is attached to the guide wire, and the other end passes through the rope threader 7 and is fixed in position. The bottom of the rope threader 7 is connected to the aerial lifting device. The aerial lifting device is pulled up, and the rope threader 7 is attached to the connecting crossbar through the hooks 72. At this time, the aerial lifting device is in position. If it needs to move left or right, it is only necessary to use the drive device 4, which is powered by an electric wrench, set on the right bracket 2. The drive device 4 drives the traveling wheel 21 on the right bracket 2 to rotate, thereby driving the entire device to move laterally along the guide wire.

[0073] Example 2

[0074] Please refer to Figure 10Based on Embodiment 1, this embodiment provides an overhead line maintenance operation method that combines a lifting device and a lateral walking device. The lifting device used in this embodiment has been disclosed in the patent with publication number CN112117703B. The lifting device includes a triangular balance support A1, an insulated anti-rope wear reduction mechanism A2, an aluminum alloy shell explosion-proof lithium battery A3, a descent speed control mechanism and a backrest combination adjustment chair A5.

[0075] A triangular balance support A1 is located at the bottom of the high-altitude work lifting device for the power transmission line and is detachably connected to an insulated rope wear prevention and deceleration mechanism A2. The insulated rope wear prevention and deceleration mechanism A2 is powered by an aluminum alloy shell explosion-proof lithium battery A3 fixed on one side and can rotate to wind the insulated rope. A descent speed control mechanism is located on the other side of the insulated rope wear prevention and deceleration mechanism A2. The descent speed control mechanism is connected to the insulated rope wear prevention and deceleration mechanism A2 and can control the descent speed through the insulated rope wear prevention and deceleration mechanism A2. A backrest combination adjustable chair A5 is located at the top of the high-altitude work lifting device for the power transmission line. Its bottom two sides are fixedly connected to the descent speed control mechanism and the aluminum alloy shell explosion-proof lithium battery A3 A4, respectively, and its front end is fixedly installed. The insulated rope wear prevention and deceleration mechanism includes a rope clamping assembly A15, a wire blocking assembly A16, an insulated rope reel A17, a gearbox A18, and a brushless motor A19.

[0076] A method for maintaining overhead power lines that combines a lifting device with a lateral travel device includes the following steps:

[0077] S1. Deploy the traction rope. Based on the rope length of the work team, select the location to be deployed onto the power line and use a drone to deploy the traction rope. It is worth noting that the selected deployment location does not necessarily have to be the location of the live line defect. Other lower locations can be selected. Then, the workers can walk along the conductor to the location of the live line defect. For example, for long spans (rivers, deep ditches, highway canyons, dense forests, etc.), it is necessary to select a location with a low distance from the ground to send the workers onto the conductor. The workers can then walk along the conductor to the location of the live line defect. Choosing to enter the conductor from a lower location can save the length of all auxiliary ropes used.

[0078] Preferably, in this embodiment, the step S1 of the drone deploying the traction rope includes the following steps:

[0079] a. Setting up drones: Set up an observation line 10m away from the vertical projection of the side phase conductor; set up a landing pad and a moisture-proof mat in parallel around the 10m observation line; set up drones on the landing pad; arrange insulated traction ropes in an S-shape on the moisture-proof mat; connect one end of the insulated traction rope to a plumb bob; and connect the plumb bob to the drone's drag hook device.

[0080] b. Inspect the drone: The operator checks and confirms that the drone's airframe structure, the remote controller's battery level, the data transmission facilities between the drone and the remote controller, and the status of the drag link are all normal;

[0081] c. Drone Rope Throwing: The operator checks the wind speed. If the wind speed is ≤5m / s, which meets the requirements for drone flight, the drone throws the rope. The drone operator takes off vertically with the drone carrying the plumb bob and the traction rope. After reaching a height of twice the distance between the conductor and the ground, the operator flies the drone horizontally towards the inside of the line, maintaining a constant vertical distance from the ground. The observer stands on the ground between the side phase conductor and the ground wire to observe. When the drone reaches the distance between the side phase conductor and the ground wire, the operator remotely opens the drag device, causing the plumb bob carrying the traction rope to fall vertically to the ground. The drone returns along the same path and lands back on the helipad. After the drone lands, ensure that the remote controller is locked. First, disconnect all power supplies to the drone, and then disconnect the power to the remote controller.

[0082] S2. Install the lateral travel device, attach the traction rope to the lateral travel device, and activate the deceleration device 6 of the lateral travel device; attach the high-strength static rope 8 for the lifting device and the fall protection rope for equipotential workers to the lateral travel device; ground workers operate the traction rope to hang the lateral travel device on the guide wire; make the lower plane of the pressure block 64 lower than the contact surface between the travel wheel 21 and the guide wire; place the guide wire below the auxiliary wheel 11 between the first stop 13 and the left bracket 11 and below the travel wheel 21 between the second stop 23 and the right bracket 2.

[0083] Preferably, in this embodiment, after the lateral walking device is hung on the guide wire in step S2, two workers conduct an impact test on it to confirm whether it is securely hung.

[0084] S3. Install the lifting device and check whether the appearance and main components of the lifting device are normal. Ground workers connect the rope threader 7 to the lifting device, pass the static rope 8 through the rope threader 7, and connect the static rope 8 to the rope clamping assembly A15 in the insulated rope anti-wear deceleration mechanism of the lifting device.

[0085] Preferably, in this embodiment, in step S3, to check whether the main components of the lifting device are normal, the power supply of the electric device needs to be turned on, the power supply needs to be checked to ensure that the power is sufficient, and the raising and lowering functions of the electric device are confirmed to be normal.

[0086] S4. When equipotential workers enter the electric field, they should wear a full set of qualified shielding clothing, sit in a chair, and fasten the fall protection rope. They should then sit on the lifting device and operate the lifting device to enter the electric field.

[0087] Preferably, in this embodiment, in step S4, the equipotential worker operates the lifting device and pauses when it is about 1m above the ground. Two ground workers conduct an impact test on the lifting device and backup protection. After confirming that the impact test is qualified, the equipotential worker operates the lifting device to rise to 0.5m away from the conductor and pauses. The worker then checks the connection points of the shielding suit again and confirms that the connection is secure. The worker reports to the work supervisor and, after receiving permission, uses a potential transfer rod to complete the potential transfer. The worker then continues to operate the lifting device to lift the personnel to the work position for maintenance work.

[0088] In step S4, a fall arrestor is installed on the safety rope. After the electrician wearing a full set of qualified protective clothing sits on the chair, the fall arrestor is connected. In step S4, during the lifting process, tools or materials can be carried along with the lifting device within the safe load limit of the lifting device.

[0089] S5. Enter the location of the faulty live line and perform the operation. Connect the rope threader 7 to the connecting crossbar 3 of the lateral travel device, and turn off the deceleration device 6 of the lateral travel device. The positional relationship between the lateral travel device and the lifting device is as follows: Figure 8 and Figure 9 As shown, the lateral travel device drives the lifting device and the operator to move laterally along the conductor to the location of the fault on the live line. The deceleration device 6 of the lateral travel device is activated, the lateral travel device is locked, and the overhead line maintenance work is carried out.

[0090] Preferably, in this embodiment, by fitting the electric wrench with the electric wrench connector 44, the electric wrench drives the lateral travel device to move the lifting device and the operator laterally along the conductor back to the lower position. Specifically, by fitting the electric wrench with the electric wrench connector 44, the electric wrench drives the travel wheel 21 to move the lifting device and the operator laterally along the conductor to enter the defect location of the live line.

[0091] S6. Exit the faulty position of the live line. After the maintenance work of the overhead line is completed, turn off the deceleration device 6 of the lateral travel device. Drive the lifting device and the workers to move laterally along the conductor to return to the lower position through the lateral travel device. Turn on the deceleration device 6 of the lateral travel device.

[0092] Preferably, in this embodiment, the electric wrench is fitted with the electric wrench connector 44, and the electric wrench drives the lateral travel device to move the lifting device and the operator laterally along the conductor to the location of the fault in the live line. Specifically, the electric wrench is fitted with the electric wrench connector 44, and the electric wrench drives the travel wheel 21 to move the lifting device and the operator laterally along the conductor back to the lower position.

[0093] S7. After the equipotential work personnel leave the electric field, check that there are no leftover items, check the connection of each point of the shielding suit, and report to the work supervisor after confirming that the connection is secure. After receiving the permission order, use the potential transfer rod to transfer the potential, leave the electric field, and operate the lifting device to return to the ground.

[0094] S8. Remove work tools and clean up the work site. Ground workers remove the lateral walking device hanging on the guide wire, lower it to the ground with a traction rope, clean up the work site, and the work is completed.

[0095] In this embodiment, working on the conductor only requires cooperation with a drone. Ground personnel operate the drone to deploy a traction rope. The ground personnel attach the static rope 8 for the lifting device and the backup fall protection rope to the lateral travel device. The ground personnel use the traction rope to hang the lateral travel device on the conductor, and then install the lifting device and static rope 8. The equipotential worker, wearing a safety belt and fall protection rope, sits on the lifting device and operates the device to reach the upper position. Then, using the lateral travel device, they enter the location of the fault in the live line to carry out work (replacing spacers, replacing vibration dampers, repairing conductors, etc.). This expands the application range of the lifting device, enabling precise positioning for maintenance work in areas with large spans and distances. It reduces the need for workers to carry rope ladders or use physically demanding equipment such as gantry cranes, thereby reducing the physical burden on workers when working at height, reducing the need for workers to perform dangerous actions (such as self-propelled line walking or using rope ladder frames for movement), and increasing the safety of working at height.

[0096] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Substitutions may include replacements for some structures, devices, or method steps, or may be complete technical solutions. Equivalent substitutions or modifications made to the technical solutions and inventive concepts of the present invention should all be covered within the scope of protection of the present invention.

Claims

1. A method of overhead line maintenance work in which a lifting device is combined with a lateral walking device, characterized in that, The method comprises the following steps: S1, releasing a traction rope, connecting the rope length of the work team, selecting the position needed to be on line, and releasing the traction rope by using a drone; S2, installing a transverse walking device, tying the traction rope on the transverse walking device, and starting the speed reducer of the transverse walking device; tying the high-strength static rope for the lifting device and the anti-falling backup protection rope for the equipotential worker on the transverse walking device; the ground worker operates the traction rope to hang the transverse walking device on the conductor; S3, installing a lifting device, checking whether the appearance and components of the lifting device are normal; the ground worker connects the rope threading device with the lifting device, threads the static rope through the rope threading device, and connects the static rope with the rope clamping assembly in the anti-abrasion speed reducer mechanism of the insulating rope of the lifting device; S4, the equipotential worker enters the electric field, the equipotential worker wears a complete set of qualified shielding clothes and sits on the seat, and fastens the anti-falling protection rope; sitting on the lifting device, operating the lifting device to enter the electric field; S5, entering the live line defect position and performing work, connecting the rope threading device with the connecting crossbar of the transverse walking device, closing the speed reducer of the transverse walking device, moving the lifting device and the worker along the conductor by the transverse walking device to enter the live line defect position, opening the speed reducer of the transverse walking device, locking the transverse walking device, and performing overhead line maintenance work; S6, exiting the live line defect position, closing the speed reducer of the transverse walking device after the overhead line maintenance work is completed, moving the lifting device and the worker along the conductor by the transverse walking device to return to the off-line position, and opening the speed reducer of the transverse walking device; S7, the equipotential worker exits the electric field, after the maintenance work is completed, the equipotential worker checks whether there is any work left, checks the connection of each point of the shielding clothes, confirms that the connection is firm, reports to the work director, shifts the potential by using the potential shifting rod after obtaining the permission order, exits the electric field, and operates the lifting device to return to the ground; S8, removing the work tools and cleaning the work site, the ground worker removes the transverse walking device hung on the conductor, releases the traction rope to the ground, cleans the work site, and ends the work.

2. The aerial maintenance method according to claim 1, wherein The step S1 of releasing the traction rope by using the drone comprises the following steps: a. setting the drone: setting an observation line at a distance of 10 m from the vertical projection of the phase conductor; setting a landing pad and a moisture pad in sequence and side by side outside the 10 m observation line, setting the drone on the landing pad, and arranging the insulating traction rope in an S shape on the moisture pad, with one end of the insulating traction rope being connected with a plumb bob, and the plumb bob being connected with a towing buckle device of the drone; b. checking the drone: the worker checks and confirms that the body structure of the drone, the battery capacity of the remote controller, the data transmission facilities of the drone and the remote controller, and the state of the towing buckle device are normal. c. UAV rope throwing: the operator detects the wind speed, and when the wind speed meets the UAV flight requirement of ≤5 m / s, the UAV rope is thrown; the UAV pilot operates the UAV to vertically take off with the vertical ball and the traction rope, and when the height reaches twice the distance of the ground, the pilot operates the UAV to fly horizontally inside the line, that is, the vertical distance to the ground is kept unchanged, and the ground observation is observed between the phase conductor and the ground wire; when the UAV reaches between the phase conductor and the ground wire, the operator remotely controls the opening of the drag buckle device, so that the vertical ball carries the traction rope vertically and falls to the ground, the UAV returns to the original route and lands on the parking lot, and after the UAV lands, it is ensured that the remote controller is locked, the power of the UAV is cut off first, and then the power of the remote controller is cut off.

3. The aerial maintenance method according to claim 1, wherein, After the transverse walking device is hung on the conductor in the step S2, two operators perform an impact test on it to confirm whether it is hung stably and firmly.

4. The aerial maintenance method according to claim 1, wherein In the step S4, the equal-potential operator operates the lifting device to leave the ground by 1 m, and then stops; two ground operators perform an impact test on the lifting device and the backup protection, and after confirming that the impact test is qualified, the equal-potential operator operates the lifting device to rise to a distance of 0.5 m from the conductor, and then stops; the equal-potential operator rechecks the connection points of the shielding clothes and confirms that the connection is firm, reports to the work supervisor, and after obtaining the permission order, completes the potential transfer by using the potential transfer rod, and continues to operate the lifting device to lift the operator to the operation position to perform the maintenance operation.

5. The overhead line maintenance work method according to claim 1 or 4, wherein In the step S4, the fall arrestor is installed on the protection rope, and after the equal-potential operator wears the complete set of qualified shielding clothes and sits on the seat, the fall arrestor is connected.

6. The overhead line maintenance work method according to claim 1 or 4, wherein In the step S4, during the lifting of the lifting device, tools or materials can be carried together within the safe load range of the lifting device.

7. The aerial maintenance method according to claim 1, wherein, In the step S3, it is checked whether the components of the lifting device are normal, the power of the electric device is turned on, it is checked and confirmed that the power is sufficient, and it is checked and confirmed that the lifting and descending functions of the electric device are normal.

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