Self-climbing wind power maintenance crane

Abstract

The present invention discloses a self-climbing wind power maintenance crane, belonging to the technical field of lifting equipment, including: a self-climbing device and a lifting device. A hydraulic winch is provided on the self-climbing device. The lifting device includes: a climbing mechanism and a crane body. The climbing mechanism is arranged below the self-climbing device, and the crane body is arranged on the side wall of the climbing mechanism. The self-climbing device is used to climb along the tower column to reach a predetermined working position and firmly attach to the tower column. The hydraulic winch is used to tow the climbing mechanism to rise and fall along the tower column, and at the same time drive the crane body to rise and fall along the tower column. The climbing mechanism is used to climb along the tower column during the process of the crane body being towed and climbed, and firmly attach to the tower column when the crane body reaches the working position. The climbing of the present invention is stable, efficient, has good reliability, the equipment has a small size, is less affected by weather, is convenient for installation and disassembly, can be quickly transferred, effectively reduces the cost of wind power maintenance operations, and improves efficiency and benefits.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting equipment, and particularly to a self-climbing wind power maintenance crane. Background Art

[0002] Currently, the wind power industry is in a period of rapid growth. Wind power equipment is continuously developing towards high power and high tower barrels. Wind farms are mostly located in mountainous areas, deserts, wildernesses, offshore areas, shallow seas, etc. with inconvenient transportation and harsh environments, resulting in higher requirements for equipment for the installation and maintenance of wind turbines, increasing operation difficulty, and significantly rising lifting costs.

[0003] The quality assurance period of wind turbines is generally 5 years. Basically all the wind turbines installed during the previous explosive growth period have passed the quality assurance period. Due to the low level of early design and manufacturing technology, after several years of operation, the failure rate of the units is often relatively high.

[0004] Currently, when wind farms are under maintenance, large equipment such as crawler cranes, all-terrain cranes, offshore lifting vessels or self-elevating working platforms with large lifting capacities and high lifting heights used during wind power installation are still generally used for construction, resulting in the problem of using big materials for small purposes. The purchase or rental costs of these large equipment are high. If only a small number of wind turbines are repaired, the cost is too high. Repairs are often carried out only when a certain number of damaged wind turbines are reached, which causes huge wind abandonment losses. At the same time, there are safety hazards due to the lack of timely repair of wind turbines. In addition, due to their large size and the large height from the tower bottom support surface to the tower top, these large equipment are easily affected by bad weather such as strong winds, and the transfer is slow, resulting in low maintenance efficiency. The wind power operation and maintenance industry urgently needs a wind power maintenance lifting equipment with a small size, strong adaptability and low cost.

[0005] In view of the above situation, a class of self-climbing cranes has emerged in this field, such as CN105271010. Generally, such cranes are provided with an upper arm and a lower arm that can hold the tower barrel tightly, and the telescopic cylinder between the upper arm and the lower arm is used to realize the alternate step movement of the arm along the length direction of the tower barrel.

[0006] The problem with this kind of self-climbing crane is that during climbing, the self-climbing device and the lifting device climb at the same time, resulting in an excessive load on the self-climbing device and limited effective lifting capacity. Moreover, the alternate step movement of the telescopic cylinder belongs to intermittent movement. To reduce the impact of the start and stop of the cylinder during step change, the telescopic speed of the cylinder is slow, and the climbing efficiency is low. Its adaptive arm structure and actions are relatively complex. The arm tightening cylinder is only locked by a hydraulic lock. If the hydraulic lock fails or the internal leakage of the hydraulic cylinder is too large, there is a risk of the arm loosening, resulting in low climbing efficiency and low reliability. Summary of the Invention

[0007] In view of the above problems existing in the existing self-climbing crane, the present invention aims to provide a self-climbing wind power maintenance crane, which has smooth and efficient climbing, good reliability, a relatively small equipment size, is less affected by weather, is convenient for installation and disassembly, can quickly transfer the site, effectively reduce the cost of wind power maintenance operations, and improve efficiency and benefits.

[0008] The specific technical solutions are as follows:

[0009] A self-climbing wind power maintenance crane, comprising: a self-climbing device and a lifting device. A hydraulic winch is provided on the self-climbing device. The lifting device includes a climbing mechanism and a crane body. The climbing mechanism is arranged below the self-climbing device, and the crane body is arranged on the side wall of the climbing mechanism. The self-climbing device is used to climb along the tower column to reach a predetermined working position and firmly attach to the tower column. The hydraulic winch is used to tow the climbing mechanism to lift and lower along the tower column, and at the same time drive the crane body to lift and lower along the tower column. The climbing mechanism is used to climb along the tower column during the process of the crane body being towed and climbed, and firmly attach to the tower column when the crane body reaches the working position.

[0010] The above-mentioned self-climbing wind power maintenance crane, wherein the self-climbing device includes:

[0011] A first clamping arm assembly, which is arranged on the outer wall of the tower column. The first clamping arm assembly is used to adapt to the change in the diameter range of the tower column;

[0012] A number of driving wheel assemblies, all of which are arranged on the first clamping arm assembly. The number of driving wheel assemblies is used to drive the self-climbing device to climb along the outer wall of the tower column, and the first clamping arm assembly is used to provide a pressing force for the driving wheel assemblies to generate the friction force required for climbing motion;

[0013] A number of clamping assemblies, all of which are arranged on the first clamping arm assembly. The number of clamping assemblies is used to clamp the outer wall of the tower column when the self-climbing device is at the predetermined working position.

[0014] The above-mentioned self-climbing wind power maintenance crane, wherein the climbing mechanism includes:

[0015] Two second clamping arm assemblies, both of which are arranged on the outer wall of the tower column. Both of the second clamping arm assemblies are used to adapt to the change in the diameter range of the tower column;

[0016] At least two connecting beams, the upper and lower ends of the two connecting beams are respectively fixedly connected to both sides of the two second clamping arm assemblies;

[0017] A plurality of telescopic wheel assemblies, and a plurality of the telescopic wheel assemblies are respectively arranged on the two second arm assemblies. The plurality of telescopic wheel assemblies are used for rolling cooperation with the outer wall of the tower column during the traction and climbing process of the lifting device.

[0018] A plurality of holding claws, and a plurality of the holding claws are respectively arranged on the two second arm assemblies. The plurality of holding claws are used for tightly holding the outer wall of the tower column by the contraction of the two second arm assemblies when the lifting device reaches the working position.

[0019] For the above self-climbing wind power maintenance crane, wherein, the first arm assembly and each of the second arm assemblies each include: a plurality of telescopic arms and a plurality of corner boxes. The plurality of telescopic arms and the plurality of corner boxes are arranged at intervals and are sequentially connected to form an annular frame.

[0020] For the above self-climbing wind power maintenance crane, wherein, each of the telescopic arms includes:

[0021] Two first arms, and one ends of the two first arms are respectively detachably connected to two adjacent corner boxes;

[0022] Two second arms, and one ends of the two second arms are respectively movably connected to the other ends of the two first arms, and the other ends of the two second arms are fixedly connected;

[0023] Two telescopic oil cylinders, and the two telescopic oil cylinders are respectively arranged in the two second arms. One ends of the two telescopic oil cylinders are respectively fixedly connected to the other ends of the two second arms, and the other ends of the two telescopic oil cylinders respectively extend into the other ends of the two first arms and are respectively fixedly connected to the two first arms.

[0024] For the above self-climbing wind power maintenance crane, wherein, each of the telescopic wheel assemblies includes:

[0025] A telescopic rod, and the telescopic rod is arranged on the holding claw or the second arm assembly;

[0026] A hydraulic cylinder, and the hydraulic cylinder is arranged in the telescopic rod. The hydraulic cylinder is used for driving the telescopic rod to expand and contract;

[0027] At least one guiding wheel, and the guiding wheel is rotatably connected to the end of the telescopic rod. The guiding wheel is used for rolling cooperation with the outer wall of the tower column.

[0028] For the above self-climbing wind power maintenance crane, wherein, the crane body is fixedly connected to the two second arm assemblies through a bracket. The upper and lower ends of the bracket are respectively fixedly connected to the side walls of the two second arm assemblies, and the crane body is arranged on the bracket.

[0029] For the above self-climbing wind power maintenance crane, wherein, the crane body includes:

[0030] A turntable, the turntable being rotatably connected to the upper end of the bracket;

[0031] A telescopic boom, the lower end of which is fixedly connected to the turntable, and the upper end of which is provided with a sling mechanism;

[0032] A luffing mechanism, the lower end of which is fixedly connected to the turntable, the upper end of which is fixedly connected to the telescopic boom, and the luffing mechanism is used to realize the luffing movement of the telescopic boom;

[0033] Two lifting mechanisms, both of which are arranged on the turntable, are symmetrically located on both sides of the telescopic arm, are transmission-connected to the sling mechanism, and are used to realize the lifting movement of the sling mechanism and realize the balance of the sling mechanism during the lifting movement.

[0034] The above-mentioned self-climbing wind power maintenance crane, wherein each of the active wheel assemblies comprises:

[0035] A vehicle frame, wherein the vehicle frame is fixedly connected to the first arm assembly;

[0036] Two driving mechanisms, both of which are arranged on the frame;

[0037] Two wheels, the two wheels are respectively connected to the two driving mechanisms in transmission.

[0038] The above-mentioned self-climbing wind power maintenance crane, wherein each of the clamping assemblies comprises:

[0039] A support, the support being fixedly connected to the first arm assembly;

[0040] a balance beam, the middle portion of which is rotatably connected to the support;

[0041] Two clamping cylinders, one end of each of the clamping cylinders being fixedly connected to two ends of the balance beam respectively;

[0042] Two clamping blocks are respectively fixedly connected to the other ends of the two clamping oil cylinders.

[0043] The above-mentioned self-climbing wind power maintenance crane, wherein the first arm assembly further comprises:

[0044] A plurality of guide rollers, wherein the plurality of guide rollers are arranged on the outer wall of the first arm assembly, and the plurality of guide rollers are arranged at equal intervals along the outer circumference of the first arm assembly;

[0045] Two hydraulic rollers, both of the two hydraulic rollers are arranged on the outer wall of the first arm assembly, and both of the two hydraulic rollers are located between any two adjacent guiding rollers;

[0046] At least two ropes, each of the ropes is respectively in transmission connection with the four guiding rollers and the two hydraulic rollers.

[0047] The positive effects of the above technical solution compared with the prior art are as follows:

[0048] The present invention includes two separate moving components, namely a self-climbing device and a lifting device. The self-climbing device is used to roll along the tower column to climb to the top of the tower, and then use the hydraulic winch arranged thereon to lift the lifting device to the working position. The lifting device is used to perform maintenance hoisting operations after being lifted to the working position by the hydraulic winch. The equipment of the present invention has a small size, the self-weights of the respective moving components are relatively light, the climbing movement is stable and efficient, the reliability is high, and the adaptable tower diameter change range is large, the adaptability is strong. It is attached to the top of the tower for hoisting operations, has good stability, is less affected by harsh weather such as strong winds, is convenient for disassembly, installation and transfer, and can effectively reduce the maintenance cost of onshore and offshore wind power equipment and improve the maintenance efficiency. Description of the Drawings

[0049] Figure 1 It is a schematic diagram of the overall structure of a self-climbing type wind power maintenance crane of the present invention;

[0050] Figure 2 It is a schematic diagram of the state where the self-climbing device of a self-climbing type wind power maintenance crane of the present invention pulls the lifting device;

[0051] Figure 3 It is a schematic diagram of the structure of the lifting device of a self-climbing type wind power maintenance crane of the present invention;

[0052] Figure 4 It is a schematic diagram of the structure of the first embodiment of the first arm assembly and the second arm assembly of a self-climbing type wind power maintenance crane of the present invention;

[0053] Figure 5 It is a schematic diagram of the structure of the driving wheel assembly of a self-climbing type wind power maintenance crane of the present invention;

[0054] Figure 6 It is a schematic diagram of the structure of the clamping assembly of a self-climbing type wind power maintenance crane of the present invention;

[0055] Figure 7 It is a schematic diagram of the structure of the telescopic wheel assembly of a self-climbing type wind power maintenance crane of the present invention;

[0056] Figure 8 It is a schematic diagram of the structure of the second embodiment of the first arm assembly of a self-climbing type wind power maintenance crane of the present invention;

[0057] In the attached drawings: 1. Self-climbing device; 2. Lifting device; 3. Hydraulic winch; 4. Climbing mechanism; 5. Crane body; 6. Tower column; 7. Bracket; 11. First arm assembly; 12. Driving wheel assembly; 121. Frame; 122. Driving mechanism; 123. Wheel; 13. Clamping assembly; 131. Support; 132. Balance beam; 133. Clamping oil cylinder; 134. Clamping block; 17. Guide roller; 18. Hydraulic reel; 19. Rope; 31. Telescopic arm; 311. First arm; 312. Second arm; 313. Telescopic oil cylinder; 32. Angle box; 41. Second arm assembly; 42. Connecting beam; 43. Telescopic wheel assembly; 431. Telescopic rod; 432. Guide wheel; 44. Claw; 51. Slewing platform; 52. Telescopic boom; 53. Luffing mechanism; 54. Hoisting mechanism; 55. Sling mechanism. Specific embodiments

[0058] The present invention will be further described below in conjunction with the attached drawings and specific embodiments, but it is not intended to limit the present invention.

[0059] First embodiment:

[0060] Figure 1 It is a schematic diagram of the overall structure of a self-climbing wind power maintenance crane of the present invention. Figure 2 It is a schematic diagram of the state where the self-climbing device of a self-climbing wind power maintenance crane of the present invention pulls the lifting device. Figure 3 is a schematic diagram of the structure of the lifting device in a self-climbing wind power maintenance crane of the present invention. Figure 4 It is a schematic diagram of the first embodiment of the first arm assembly and the structure of the second arm assembly in a self-climbing wind power maintenance crane of the present invention. Figure 5 It is a schematic diagram of the structure of the driving wheel assembly in a self-climbing wind power maintenance crane of the present invention. Figure 6 It is a schematic diagram of the structure of the clamping assembly in a self-climbing wind power maintenance crane of the present invention. Figure 7 It is a schematic diagram of the structure of the telescopic wheel assembly in a self-climbing wind power maintenance crane of the present invention. As Figures 1 to 7 shown, a preferred embodiment of a self-climbing wind power maintenance crane is shown, including: a self-climbing device 1 and a lifting device 2. A hydraulic winch 3 is provided on the self-climbing device. The lifting device 2 includes: a climbing mechanism 4 and a crane body 5. The climbing mechanism 4 is arranged below the self-climbing device 1, and the crane body 5 is arranged on the side wall of the climbing mechanism 4. The self-climbing device 1 is used to climb along the tower column 6 to reach a predetermined working position and firmly attach to the tower column 6. The hydraulic winch 3 is used to pull the climbing mechanism 4 to move up and down along the tower column 6, and at the same time drive the crane body 5 to move up and down along the tower column 6. The climbing mechanism 4 is used to climb along the tower column 6 during the process of the crane body 5 being pulled and climbed, and firmly attach to the tower column 6 when the crane body 5 reaches the working position.

[0061] Preferably, the hydraulic winch 3 is fixedly connected to the climbing mechanism 4 via a rope, and the hydraulic winch 3 is transmission-connected to the climbing mechanism 4 .

[0062] Further, as a preferred embodiment, the self-climbing device 1 includes: a first arm assembly 11, a plurality of active wheel assemblies 12 and a plurality of clamping assemblies 13. The first arm assembly 11 is arranged on the outer wall of the tower column 6, and the first arm assembly 11 is used to adapt to the range of changes in the diameter of the tower column 6. The plurality of active wheel assemblies 12 are all arranged on the inner wall of the first arm assembly 11. The plurality of active wheel assemblies 12 are used to drive the self-climbing device 1 to climb along the outer wall of the tower column 6, and the first arm assembly 11 is used to provide the active wheel assembly 12 with a clamping force that can generate the friction force required for climbing movement. The plurality of clamping assemblies 13 are all arranged on the inner wall of the first arm assembly 11. The plurality of clamping assemblies 13 are used to clamp the outer wall of the tower column 6 when the self-climbing device 1 is in a predetermined working position.

[0063] Preferably, the first arm assembly 11 adapts to changes in the diameter range of the tower column 6 under the coordinated telescopic action of the telescopic cylinder 313.

[0064] Preferably, the first arm assembly 11 is provided with a pressure sensor, a displacement sensor and an inclination sensor.

[0065] Further, as a preferred embodiment, the climbing mechanism 4 includes: two second arm assemblies 41, at least two connecting beams 42, a plurality of telescopic wheel assemblies 43 and a plurality of claws 44, the two second arm assemblies 41 are both arranged on the outer wall of the tower column 6, the two second arm assemblies 41 are both used to adapt to the range of changes in the diameter of the tower column 6, the upper and lower ends of the two connecting beams 42 are respectively fixedly connected to the two sides of the two second arm assemblies 41, the plurality of telescopic wheel assemblies 43 are respectively arranged on the inner walls of the two second arm assemblies 41, the plurality of telescopic wheel assemblies 43 are used to roll with the outer wall of the tower column 6 during the process of the lifting device 2 being towed and climbed, the plurality of claws 44 are respectively arranged on the inner walls of the two second arm assemblies 41, the plurality of claws 44 are used to hold the outer wall of the tower column 6 by contracting the two second arm assemblies 41 when the lifting device 2 reaches the working position.

[0066] Preferably, the claws 44 are used to hold the tower 6 tightly to reduce the contact pressure after the telescopic wheel assembly 43 is retracted.

[0067] Preferably, the upper and lower ends of a connecting beam 42 are respectively fixedly connected to one side of a second arm assembly 41 and one side of another second arm assembly 41, and the upper and lower ends of another connecting beam 42 are respectively fixedly connected to the other side of the second arm assembly 41 and the other side of another second arm assembly 41.

[0068] The above are only the preferred embodiments of the present invention, and do not limit the implementation manners and protection scope of the present invention accordingly.

[0069] On the basis above, the present invention further has the following implementation manners:

[0070] In a further embodiment of the present invention, please continue to refer to Figures 1 to 7 As shown, the first arm assembly 11 and each second arm assembly 41 each include: a plurality of telescopic arms 31 and a plurality of angle boxes 32. The plurality of telescopic arms 31 and the plurality of angle boxes 32 are arranged at intervals and are sequentially connected to form an annular frame.

[0071] Preferably, the structures and principles of the first arm assembly 11 and the second arm assembly 41 are the same.

[0072] Preferably, the first arm assembly 11 and each second arm assembly 41 each include: four telescopic arms 31 and four angle boxes 32. The four telescopic arms 31 and the four angle boxes 32 are arranged at intervals and are sequentially connected to form a square frame.

[0073] In a further embodiment of the present invention, each telescopic arm 31 includes: two first arms 311, two second arms 312 and two telescopic oil cylinders 313. One ends of the two first arms 311 are respectively detachably connected to two adjacent angle boxes 32. One ends of the two second arms 312 are respectively movably connected to the other ends of the two first arms 311. The other ends of the two second arms 312 are fixedly connected. The two telescopic oil cylinders 313 are respectively arranged in the two second arms 312. One ends of the two telescopic oil cylinders 313 are respectively fixedly connected to the other ends of the two second arms 312. The other ends of the two telescopic oil cylinders 313 respectively extend into the other ends of the two first arms 311 and are respectively fixedly connected to the two first arms 311.

[0074] Preferably, one ends of the two second arms 312 are respectively slidably connected or rollingly connected to the other ends of the two first arms 311.

[0075] Preferably, each telescopic arm further includes: two mechanical locking devices. The mechanical locking device can adopt a mechanical locking device built inside the hydraulic cylinder, or can adopt a locking mechanism such as a wedge block mechanism or a rack and pinion acting between the first arm and the second arm.

[0076] Preferably, each telescopic arm further includes: two hydraulic locking devices. The two hydraulic locking devices are respectively arranged in the oil circuits of the two telescopic oil cylinders 313. The hydraulic locking device is a balance valve or a hydraulic lock.

[0077] In a further embodiment of the present invention, each telescopic wheel assembly 43 includes: a telescopic rod 431, a hydraulic cylinder (not shown in the figure) and at least one guide wheel 432, the telescopic rod 431 is arranged on the claw 44 or on the inner wall of the second arm assembly 41, the hydraulic cylinder is arranged in the telescopic rod 431, the hydraulic cylinder is used to drive the telescopic rod 431 to extend and retract, the guide wheel 432 is rotatably connected to the end of the telescopic rod 431, and the guide wheel 432 is used to roll with the outer wall of the tower column 6.

[0078] Preferably, the guide wheel 432 is made of polyurethane or rubber. Furthermore, the material of the portion where the guide wheel 432 contacts the outer wall of the tower column 6 is made of polyurethane or rubber.

[0079] In a further embodiment of the present invention, the crane body 5 is fixedly connected to the two second boom assemblies 41 via a bracket 7 , the upper and lower ends of the bracket 7 are respectively fixedly connected to the side walls of the two second boom assemblies 41 , and the crane body 5 is disposed on the bracket 7 .

[0080] Preferably, the bracket 7 is used to support the crane body.

[0081] In a further embodiment of the present invention, the crane body 5 includes: a slewing table 51, a telescopic boom 52, a luffing mechanism 53 and two lifting mechanisms 54. The slewing table 51 is rotatably connected to the upper end of the bracket 7, the lower end of the telescopic boom 52 is fixedly connected to the slewing table 51, and the upper end of the telescopic boom 52 is provided with a sling mechanism 55. The lower end of the luffing mechanism 53 is fixedly connected to the slewing table 51, and the upper end of the luffing mechanism 53 is fixedly connected to the telescopic boom 52. The luffing mechanism 53 is used to realize the luffing movement of the telescopic boom 52. The two lifting mechanisms 54 are both arranged on the slewing table 51, and the two lifting mechanisms 54 are symmetrically located on both sides of the telescopic boom 52. The two lifting mechanisms 54 are both transmission-connected to the sling mechanism 55. The two lifting mechanisms 54 are both used to realize the lifting movement of the sling mechanism 55 and realize the balance of the sling mechanism 55 during the lifting movement.

[0082] Preferably, the crane body 5 is used to realize the rotation, luffing and lifting movements required for the lifting operation.

[0083] Preferably, the turntable 51 is driven by a hydraulic motor.

[0084] In a further embodiment of the present invention, each active wheel assembly 12 includes: a frame 121, two driving mechanisms 122 and two wheels 123, the frame 121 is fixedly connected to the inner wall of the first arm assembly 11, the two driving mechanisms 122 are both arranged on the frame 121, and the two wheels 123 are respectively connected to the two driving mechanisms 122 in transmission.

[0085] Preferably, the wheels are made of solid tires, and the driving mechanism 122 is made of a hydraulic motor or a reduction motor with a brake and a speed sensor.

[0086] In a further embodiment of the present invention, each clamping assembly 13 includes: a support 131, a balance beam 132, two clamping cylinders 133 and two clamping blocks 134. The support 131 is fixedly connected to the inner wall of the first arm assembly 11. The middle of the balance beam 132 is rotatably connected to the support 131. One end of each of the two clamping cylinders 133 is fixedly connected to both ends of the balance beam 132 respectively. The two clamping blocks 134 are respectively fixedly connected to the other ends of the two clamping cylinders 133.

[0087] Preferably, a plurality of driving wheel assemblies 12 and a plurality of clamping assemblies 13 are respectively fixedly connected to the four-corner box 32 or the four telescopic arms 31.

[0088] Preferably, the plurality of driving wheel assemblies 12 are four driving wheel assemblies 12, and the four driving wheel assemblies 12 are respectively fixedly connected to the four-corner box 32 or the four telescopic arms 31.

[0089] Preferably, the plurality of clamping assemblies 13 are eight clamping assemblies 13, and the eight clamping assemblies 13 are respectively fixedly connected to the four-corner box 32 or the four telescopic arms 31. Every two clamping assemblies 13 are respectively located on both sides of a driving wheel assembly 12.

[0090] Preferably, the front flange of the clamping cylinder 133 is connected to the balance beam 132, and the piston rod of the clamping cylinder 133 is connected to the clamping block 134.

[0091] Preferably, the driving wheel assembly 12 and the clamping assembly 13 are connected to the telescopic arm 31 and the corner box 32 of the self-climbing device 1, which can make the pulling force of the telescopic cylinder 313 smaller. That is, if the pressing force required for each corner is F, the pulling force of the telescopic cylinder 313 is 0.707F.

[0092] Second Embodiment:

[0093] Figure 8 It is a schematic structural diagram of the second embodiment of the first arm assembly in a self-climbing type wind power maintenance crane of the present invention. As Figure 8 shown, the main structure of the second embodiment is the same as that of the first embodiment. The difference lies in that: the first arm assembly 11 further includes: a plurality of guide rollers 17, two hydraulic winches 18 and at least two ropes 19. A plurality of guide rollers 17 are all arranged on the outer wall of the first arm assembly 11. The plurality of guide rollers 17 are arranged at equal intervals along the outer circumference of the first arm assembly 11. The two hydraulic winches 18 are both arranged on the outer wall of the first arm assembly 11. The two hydraulic winches 18 are both located between any two adjacent guide rollers 17. Each rope 19 is respectively in transmission connection with the four guide rollers 17 and the two hydraulic winches 18. Preferably, the hydraulic winch 18 is equipped with a brake.

[0094] Preferably, the rope 19 is a flexible rope.

[0095] Preferably, the four guiding rollers 17 are arranged at equal intervals along the outer periphery of the first arm component 11.

[0096] Preferably, two or more ropes can improve the service life of the arm component, and two or more ropes are arranged in parallel.

[0097] The present invention realizes the contraction action by using the hydraulic winch 18 to tighten the rope 19 wound around the four guiding rollers 17 on the outer periphery of the first arm component 11.

[0098] The hydraulic winch 3 on the self-climbing device 1 of the present invention can also be relocated to the lifting device according to the needs of the working conditions.

[0099] When performing hoisting operations such as for gearboxes, engines, blades, etc., first, the first arm component 11 of the self-climbing device 1 is contracted, so that the driving wheel assembly 12 is pressed against the outer wall of the tower column 6, and the clamping cylinder 133 is in the retracted state, and the clamping block 134 does not contact the outer wall of the tower column 6. The driving mechanism 122 drives the wheels 123 to roll along the outer wall of the tower column 6 and climb to the top of the tower column 6. The clamping assembly 13 acts to tightly hold the outer wall of the tower column. Then, the hydraulic winch is used to tow the lifting device to rise and fall along the tower column. During the traction and climbing process, the telescopic wheel assembly 43 is in the extended state, and the clamping claws 44 do not contact the outer wall of the tower column. After the lifting device 2 reaches the working position, the telescopic wheel assembly 43 is in the retracted state, and the clamping claws 44 tightly hold the outer wall of the tower column 6, and the crane body 5 can then perform replacement hoisting operations such as for gearboxes, engines, blades, etc.

[0100] After the hoisting operation is completed, the lifting device 2 is placed on the ground by using the hydraulic winch 3. If maintenance operations such as inspection, cleaning, or painting of the tower column 6 are still required, the maintenance basket can be lifted to the working position by using the hydraulic winch 3. After the operation is completed, the basket is lowered, and the self-climbing device 1 climbs from the top of the tower column 6 to the bottom of the tower column 6, and then disassembly and transfer can be carried out.

[0101] The self-climbing wind power maintenance crane provided by the present invention includes two separate moving parts, namely the self-climbing device 1 and the lifting device 2. The self-weight of each moving part is relatively light, and it adopts wheeled continuous rolling, so the climbing movement is stable and efficient, and the lifting efficiency of the hydraulic winch 3 is also relatively high.

[0102] Both the first arm component 11 and the second arm component 41 of the present invention adopt hydraulic locking and mechanical locking, with high reliability, and can adapt to a large range of diameter changes of the tower column 6, and have strong adaptability.

[0103] The equipment of the present invention is relatively small in size, is attached to the top of the tower column 6 for hoisting operations, has good stability, and is less affected by bad weather such as strong winds.

[0104] The effective lifting capacity of the present invention is relatively large. It can not only replace large components such as the gearbox, generator, and blades of the wind turbine as a whole, but also carry a hanging basket to perform maintenance operations such as tower inspection, cleaning, and painting. The function combination is diverse, the maintenance efficiency is high, the disassembly, assembly, and transfer are convenient, and it can effectively reduce the maintenance cost of onshore and offshore wind power equipment and improve the maintenance efficiency.

[0105] The above are only the preferred embodiments of the present invention, and do not limit the implementation manners and protection scope of the present invention accordingly. For those skilled in the art, it should be realized that all the equivalent replacements and obvious changes made by using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-climbing wind power maintenance crane, characterized in that, Comprising: A self-climbing device and a lifting device. A hydraulic winch is provided on the self-climbing device. The lifting device includes a climbing mechanism and a crane body. The climbing mechanism is arranged below the self-climbing device, and the crane body is arranged on the side wall of the climbing mechanism. The self-climbing device is used to climb along the tower column to a predetermined working position and firmly attach to the tower column. The hydraulic winch is used to tow the climbing mechanism to move up and down along the tower column, and at the same time drive the crane body to move up and down along the tower column. The climbing mechanism is used to climb along the tower column during the process of the crane body being towed and climbed, and firmly attach to the tower column when the crane body reaches the working position; The self-climbing device includes: A first arm assembly arranged on the outer wall of the tower column, and the first arm assembly is used to adapt to the change in the range of the diameter of the tower column; A number of active wheel assemblies, all of the active wheel assemblies are arranged on the first arm assembly. The number of active wheel assemblies is used to drive the self-climbing device to climb along the outer wall of the tower column, and the first arm assembly is used to provide a pressing force that can generate the friction force required for the climbing movement for the active wheel assemblies; A number of clamping assemblies, all of the clamping assemblies are arranged on the first arm assembly. The number of clamping assemblies is used to clamp the outer wall of the tower column when the self-climbing device is at the predetermined working position; The first arm assembly further includes: a number of guiding rollers, two hydraulic reels and at least two ropes. All of the guiding rollers are arranged on the outer wall of the first arm assembly, and the number of guiding rollers is arranged at equal intervals along the outer circumference of the first arm assembly. Both of the hydraulic reels are arranged on the outer wall of the first arm assembly, and both of the hydraulic reels are located between any two adjacent guiding rollers. Each rope is respectively in transmission connection with a number of the guiding rollers and the two hydraulic reels; The contraction action is realized by using the hydraulic reel to tighten the ropes wound on a number of the guiding rollers on the outer circumference of the first arm assembly.

2. The self-climbing wind power maintenance crane according to claim 1, characterized in that, The climbing mechanism includes: Two second arm assemblies, both of the second arm assemblies are arranged on the outer wall of the tower column, and both of the second arm assemblies are used to adapt to the change in the range of the diameter of the tower column; At least two connecting beams, the upper and lower ends of the two connecting beams are respectively fixedly connected to both sides of the two second arm assemblies; A number of telescopic wheel assemblies, and the number of telescopic wheel assemblies are respectively arranged on the two second arm assemblies. The number of telescopic wheel assemblies is used to rollingly cooperate with the outer wall of the tower column during the process of the lifting device being towed and climbed; A number of holding claws, and the number of holding claws are respectively arranged on the two second arm assemblies. The number of holding claws is used to tightly hold the outer wall of the tower column through the contraction of the two second arm assemblies when the lifting device reaches the working position.

3. The self-climbing wind power maintenance crane according to claim 2, characterized in that, The first arm assembly and each of the second arm assemblies each include: a number of telescopic arms and a number of angle boxes. The number of telescopic arms and the number of angle boxes are arranged at intervals and are sequentially connected to form an annular frame.

4. The self-climbing wind power maintenance crane according to claim 3, characterized in that, Each telescopic arm includes: Two first arms, one end of each of the two first arms being detachably connected to two adjacent corner boxes respectively; Two second arms, one end of the two second arms is movably connected to the other end of the two first arms, and the other end of the two second arms is fixedly connected; Two telescopic cylinders are respectively arranged in the two second arms, one end of the two telescopic cylinders is respectively fixedly connected to the other end of the two second arms, and the other end of the two telescopic cylinders extends into the other end of the two first arms and is respectively fixedly connected to the two first arms.

5. The self-climbing wind power maintenance crane according to claim 2, wherein, Each of the telescopic wheel assemblies comprises: a telescopic rod, the telescopic rod being arranged on the claw or the second arm assembly; a hydraulic cylinder, the hydraulic cylinder being disposed in the telescopic rod and being used to drive the telescopic rod to extend and retract; At least one guide wheel is rotatably connected to the end of the telescopic rod, and the guide wheel is used for rolling cooperation with the outer wall of the tower column.

6. The self-climbing wind power maintenance crane according to claim 2, characterized in that, The crane body is fixedly connected to the two second boom assemblies via a bracket, the upper and lower ends of the bracket are respectively fixedly connected to the side walls of the two second boom assemblies, and the crane body is arranged on the bracket.

7. The self-climbing wind power maintenance crane according to claim 6, characterized in that, The crane body comprises: A turntable, the turntable being rotatably connected to the upper end of the bracket; A telescopic boom, the lower end of which is fixedly connected to the turntable, and the upper end of which is provided with a sling mechanism; A luffing mechanism, the lower end of which is fixedly connected to the turntable, the upper end of which is fixedly connected to the telescopic boom, and the luffing mechanism is used to realize the luffing movement of the telescopic boom; Two lifting mechanisms, both of which are arranged on the turntable, are symmetrically located on both sides of the telescopic arm, are transmission-connected to the sling mechanism, and are used to realize the lifting movement of the sling mechanism and realize the balance of the sling mechanism during the lifting movement.

8. The self-climbing wind power maintenance crane according to claim 1, wherein, Each of the active wheel assemblies comprises: A frame, the frame is fixedly connected to the first arm assembly; Two driving mechanisms, both of which are arranged on the frame; Two wheels, the two wheels are respectively connected to the two driving mechanisms in transmission.

9. The self-climbing wind power maintenance crane according to claim 1, wherein, Each of the clamping assemblies comprises: A support, the support being fixedly connected to the first arm assembly; a balance beam, the middle portion of which is rotatably connected to the support; Two clamping oil cylinders, one end of each of the clamping oil cylinders is fixedly connected to the two ends of the balance beam respectively; and two clamping blocks, each of the clamping blocks is fixedly connected to the other end of each of the clamping oil cylinders respectively.

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