Self-lifting crane for wind power operation and maintenance

Abstract

The utility model discloses a crane for self-lifting wind power operation and maintenance, which comprises a plurality of self-lifting devices, a mast crane and a plurality of pulley blocks, a base is arranged on the mast crane, and the mast crane is sleeved on a fan tower drum through the base; the pulley block comprises a fixed pulley block and a movable pulley block, the fixed pulley block is mounted at the bottom of the fan cabin, and the movable pulley block is mounted on the base; the self-lifting device comprises a steel wire rope used for lifting an object, and one end of the steel wire rope is fixed to the bottom of the fan cabin and extends from the bottom of the fan cabin to be wound on the fixed pulley block and the movable pulley block. The mast crane ascends or descends along the fan tower along with winding and unwinding of the steel wire rope. According to the utility model, the tower barrel structure does not need to be changed, the hoisting capacity is stronger, each structure is simple to disassemble and assemble, each part is convenient to enter and transport after being disassembled and assembled, the cost is effectively reduced, and the adaptability of the crane to various working conditions is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power equipment, in particular to a self-lifting crane for wind power operation and maintenance. Background Art

[0002] The following methods are available for replacing and repairing key components of wind turbines, such as blades, gearboxes, generators, and bearings: (1) Using a large all-terrain crane or crawler crane, lift the components to be replaced from the ground to a height of hundreds of meters. Once the replacement is complete, lift the replacement components and lower them to the ground. (2) First, install the corresponding track on the outside of the wind turbine tower. After the wind turbine installation crane runs along the track to the corresponding height, it is fixed to the tower and the lifting operation begins. After the operation is completed, the track and crane are removed. (3) Using a small crane such as a cantilever crane, the disassembled cantilever crane is transported to the cabin through the lifting function of the tower. Professionals then assemble the cantilever crane in the cabin and start the lifting operation. After the operation is completed, the cantilever crane is removed.

[0003] However, the use of large cranes results in high maintenance costs for wind turbines. At the same time, since most wind farms are located in remote areas with complex transportation, it is difficult for large lifting equipment to enter the site, resulting in a long maintenance period, which affects the availability and power generation of the units. Installing tracks on the outside of the wind turbine tower requires a separate design for the tower, which makes the installation process of the whole machine complicated and the manufacturing and use costs high. Small cranes have weak lifting capacity and are time-consuming to disassemble and assemble, resulting in low efficiency in component replacement. Utility Model Content

[0004] Purpose of the invention: In view of the above shortcomings, the utility model provides a self-lifting wind power operation and maintenance crane which does not require changing the wind turbine tower structure, has a simple structure, is easy to disassemble and assemble, and has a strong lifting capacity.

[0005] Technical solution: In order to solve the above problems, the utility model adopts a self-lifting wind power operation and maintenance crane, including a plurality of self-lifting devices, a mast crane and a plurality of pulley blocks, the mast crane is provided with a base, and the mast crane is mounted on the wind turbine tower through the base; the pulley block includes a fixed pulley block and a movable pulley block, the fixed pulley block is installed at the bottom of the wind turbine cabin, and the movable pulley block is installed on the base; the self-lifting device includes a steel wire rope for lifting objects, one end of the steel wire rope is fixed to the bottom of the wind turbine cabin, and extends from the bottom of the wind turbine cabin and is wound around the fixed pulley block and the movable pulley block; the mast crane rises or falls along the wind turbine tower as the steel wire rope is retracted and released.

[0006] Furthermore, the mast crane also includes a boom hinged on the base and a push rod for adjusting the tilt angle of the boom, one end of the push rod is hinged to the base, and the other end is hinged to the boom.

[0007] Furthermore, the lifting arm is a portal structure, and the lifting arm includes two main arms and a crossbeam connecting the two main arms, the main arms are hinged to the push rod, and a sliding trolley for lifting objects is provided on the crossbeam.

[0008] Furthermore, the base includes a first base and a second base, the first base and the second base are provided with bosses and grooves that cooperate with each other, the base is spliced ​​by the first base and the second base, and the base is provided with a through hole for the wind turbine tower to pass through.

[0009] Furthermore, the base is provided with an opening for the steel wire rope to pass through.

[0010] Furthermore, the self-lifting device also includes a pallet, a self-lifting winch installed on the pallet and a counterweight placed on the pallet, the wire rope is wound around the self-lifting winch and the other end of the wire rope is fixed to the winch.

[0011] Furthermore, the self-lifting winch is installed on the pallet through ear plates and pin shafts.

[0012] Furthermore, the self-lifting winch is hydraulically driven, and the hydraulic source is provided by a ground pump station.

[0013] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: (1) by setting up a crane base, the crane can be moved up and down along the tower without changing the structure of the wind turbine tower and without installing rails, so the lifting method is simple and the cost is lower; (2) the crane has a simple structure and a strong lifting capacity, and no long boom is installed on the crane, so that the lifting operation is not affected by the terrain and wind speed, and the adaptability is stronger; (3) the disassembly and installation process of each structure is simple, and the size of each structure after disassembly is small, which is convenient for transportation and transfer, saving the entry and transportation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the wind power operation and maintenance crane of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the mast crane of the utility model;

[0016] Figure 3 This is a schematic diagram of the pulley block and its connection relationship structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the pulley block and its connection relationship of the utility model from a bottom-up perspective;

[0018] Figure 5 This is a schematic diagram of the structure of the self-lifting device of the utility model;

[0019] Figure 6 for Figure 5A magnified schematic diagram of the structure in the middle. DETAILED DESCRIPTION

[0020] like Figure 1 As shown, a self-lifting crane for wind power operation and maintenance in this embodiment includes two self-lifting devices 1, a mast crane 2 and two pulley blocks 3. Figure 2 As shown, the mast crane 2 includes a base 21, a boom 22 hinged on the base 21, and an electric push rod 23 for adjusting the tilt angle of the boom 22. The base 21 is formed by splicing a first base 211 and a second base 212. The first base 211 and the second base 212 are provided with bosses and grooves that match each other. A through hole is provided in the middle of the base 21 for the wind turbine tower 4 to pass through. The splicing structure facilitates the installation and removal of the mast crane 2 on the wind turbine tower 4. The base 21 is also provided with an opening for the wire rope 11 to pass through, so as to avoid friction between the wire rope 11 and the base 21. The boom 22 is a portal structure, and the boom 22 includes two main arms 221 and a crossbeam 222 connecting the two main arms 221. The main arm 221 is hinged with the electric push rod 23, and a sliding trolley 24 is provided on the crossbeam 222. The sliding trolley 24 is provided with a wire rope retracting and releasing system for lifting objects.

[0021] like Figure 3 and Figure 4 As shown, the pulley block 3 includes a fixed pulley block 31 and a movable pulley block 32. The fixed pulley block 31 is installed at the bottom of the wind turbine nacelle 5, and the movable pulley block 32 is installed on the base 21. Figure 5 As shown, the self-lifting device 1 includes a wire rope 11, a tray 12, a self-lifting winch 13 and a counterweight 14 placed on the tray 12. Figure 6 As shown, the self-lifting winch 13 is installed on the tray 12 through the ear plate 15 and the pin shaft 16. The self-lifting winch 13 is electrically driven or hydraulically driven, and the hydraulic source is provided by the ground pump station. The end of the wire rope 11 is fixed to the bottom of the fan nacelle 5. The wire rope 11 extends from the bottom of the fan nacelle 5 and is sequentially wound around the self-lifting winch 13, the fixed pulley block 31 and the movable pulley block 32, and passes through the opening of the base 21.

[0022] The method of using the utility model is as follows: When operating and maintaining wind power equipment, the self-lifting device 1 is placed on the ground directly below the wind turbine, and the self-lifting winch 13 is started to reel in the steel wire rope 11. The steel wire rope 11 drives the mast crane 2 to rise along the wind turbine tower 4 to the designated position through the pulley block 3 and then stops. The electric push rod 23 is started to adjust the inclination angle of the crane arm 22, and the sliding trolley 24 moves on the crossbeam and lifts the object. After the operation and maintenance is completed, the self-lifting winch 13 is started to release the steel wire rope 11, and the mast crane 2 is lowered to the ground along the wind turbine tower 4. The pulley block 3, the crane arm 22, and the electric push rod 23 are removed from the base 21, and then the first base 211 and the second base 212 are removed from both sides of the wind turbine tower 4 to complete the disassembly of the operation and maintenance lifting device.

[0023] The utility model provides a crane base, so that the crane can move up and down along the tower without changing the structure of the wind turbine tower and without installing tracks, and the lifting method is simple and the cost is lower; the crane has a simple structure and a strong lifting capacity, and no long boom is installed on the crane, so that the lifting operation is not affected by the terrain and wind speed, and the adaptability is stronger; the disassembly and installation process of each structure of the utility model is simple, and the volume of each structure after disassembly is small, which is convenient for transportation and transfer, saving the entry and transportation costs.

Claims

1. A self-lifting crane for wind power operation and maintenance, characterized in that: The invention comprises a plurality of self-lifting devices (1), a mast crane (2) and a plurality of pulley blocks (3); the mast crane (2) is provided with a base (21), and the mast crane (2) is sleeved on a wind turbine tower (4) through the base (21); the pulley block (3) comprises a fixed pulley block (31) and a movable pulley block (32); the fixed pulley block (31) is installed at the bottom of a wind turbine cabin (5), and the movable pulley block (32) is installed on the base (21); the self-lifting device (1) comprises a steel wire rope (11) for lifting an object, one end of the steel wire rope (11) is fixed to the bottom of the wind turbine cabin (5), and extends from the bottom of the wind turbine cabin (5) and is wound around the fixed pulley block (31) and the movable pulley block (32); the mast crane (2) rises or falls along the wind turbine tower (4) as the steel wire rope (11) is retracted or extended.

2. The self-lifting wind power operation and maintenance crane according to claim 1, characterized in that: The mast crane (2) further comprises a lifting arm (22) hinged on the base (21) and a push rod (23) for adjusting the tilt angle of the lifting arm (22); one end of the push rod (23) is hinged to the base (21), and the other end is hinged to the lifting arm (22).

3. The self-lifting wind power operation and maintenance crane according to claim 2, characterized in that: The lifting arm (22) is a portal structure, comprising two main arms (221) and a crossbeam (222) connecting the two main arms (221), the main arms (221) being hinged to a push rod (23), and a sliding trolley (24) for lifting an object is provided on the crossbeam (222).

4. The self-lifting wind power operation and maintenance crane according to claim 1, characterized in that: The base (21) comprises a first base (211) and a second base (212), wherein the first base (211) and the second base (212) are provided with bosses and grooves that cooperate with each other, the base (21) is formed by splicing the first base (211) and the second base (212), and the base (21) is provided with a through hole for the wind turbine tower (4) to pass through.

5. The self-lifting wind power operation and maintenance crane according to claim 4, characterized in that: The base (21) is also provided with an opening for the steel wire rope (11) to pass through.

6. The self-lifting wind power operation and maintenance crane according to claim 1, characterized in that: The self-lifting device (1) also includes a tray (12), a self-lifting winch (13) installed on the tray (12), and a counterweight (14) placed on the tray (12); the steel wire rope (11) is wound around the self-lifting winch (13), and the other end of the steel wire rope (11) is fixed to the winch (13).

7. The self-lifting wind power operation and maintenance crane according to claim 6, characterized in that: The self-lifting winch (13) is installed on the tray (12) through the ear plate (15) and the pin shaft (16).

8. The self-lifting wind power operation and maintenance crane according to claim 6, characterized in that: The self-lifting winch (13) is hydraulically driven, and the hydraulic source is provided by a ground pump station.

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