CN211971517U - A spreader that can adjust the aerial attitude of wind turbine blades - Google Patents

Abstract

The utility model discloses a lifting appliance capable of adjusting the air attitude of a wind power blade, which relates to the technical field of wind power equipment installation and maintenance, and comprises a blade clamp and an orientation adjusting mechanism, wherein the blade clamp is connected with a lifting hook of a crane through the orientation adjusting mechanism; the orientation adjusting mechanism comprises an upper platform, a plurality of actuators, a plurality of movable pulleys, a flexible body and a plurality of guide pulleys, the upper platform is connected with the lifting hook, the plurality of actuators and the plurality of guide pulleys are respectively arranged on the upper platform, the plurality of movable pulleys are respectively arranged on the blade clamp, and the flexible body is connected with the plurality of actuators, the plurality of movable pulleys, the plurality of guide pulleys and the upper platform, so that the efficiency of blade installation and disassembly can be greatly improved.

Description

A spreader that can adjust the aerial attitude of wind turbine blades

technical field

The utility model relates to the technical field of installation and maintenance of wind power equipment, in particular to a spreader capable of adjusting the aerial attitude of wind power blades.

Background technique

A wind turbine is a machine that converts the kinetic energy of the wind into mechanical energy and converts the mechanical energy into electrical energy through a generator. Typically used is a horizontal axis rotating wind turbine comprising a horizontal axis rotatable rotor shaft and a nacelle at the top of the tower. The hub is mounted on the rotor shaft, and the wind turbine blades are mounted on the hub. Most of the wind turbines in use today contain three wind turbine blades.

Some wind turbines include a gearbox that can be used to rotate the hub by external or integral actuators (eg, electric motors) during installation of the blades to the hub. Other wind turbines (so-called direct-drive, semi-direct-drive turbines, etc. without gearbox or with relatively small rotating gears) do not allow rotation of the hub by means of an actuator, because sufficient torque cannot be generated to rotate the hub. These wind turbines are only allowed to rotate the hub during normal operation when the blades are driven by the impinging air to convert wind energy into mechanical energy.

At present, one of the installation methods of wind turbine blades is to hoist the first wind turbine blade horizontally, install it at the hub, and then rotate the hub to make the axis of the installation position of the second wind turbine blade horizontal. Lift the second wind turbine blade horizontally and install it to the hub. Rotate the hub so that the axis of the installation position of the third wind turbine blade is horizontal. The third wind turbine blade is horizontally hoisted and installed at the hub. This method is suitable for wind turbines with large transmission ratio gearboxes, but cannot be directly applied to turbines without gearboxes or with rotating gears with relatively small transmission ratios, such as direct-drive and semi-direct-drive turbines.

For direct-drive and semi-direct-drive turbines without a gearbox or with a relatively small rotating gear, the current installation method is: install a barring at the hub of the wind turbine to drive the rotation of the hub to make the turbine The aforementioned installation method can be applied. However, it takes about 10 hours to disassemble and assemble the turning wheel, which greatly affects the installation efficiency of the blade. Moreover, for different turbines, the barring needs to be re-customized, which increases the cost of installation and maintenance.

In response to the above problems, European Patent: A Tool for Wind Turbine Blade Management (Publication No.: EP2670977B1, Publication Date: May 01, 2019). The tool for wind turbine blade management can realize the orientation adjustment of the blade in the air, allowing the installation of the blade in directions other than the horizontal direction of the axis of the wind turbine blade installation location. However, the tool used for wind turbine blade management has a complex structure and is too heavy, which is several times the weight of the wind turbine blade. It requires a large crane to complete the installation, and the application scenarios are greatly limited, especially the installation of offshore wind turbine blades. In addition, the tool for wind turbine blade management has high cost, complicated maintenance, and is difficult to be widely used.

Utility model content

The purpose of this utility model is to provide a spreader capable of adjusting the aerial attitude of wind turbine blades, which is used to solve the above-mentioned technical problems.

The technical scheme adopted by the utility model is as follows:

A spreader capable of adjusting the aerial attitude of a wind power blade, comprising: a blade clamp and an orientation adjustment mechanism, wherein the blade clamp is connected with a hook of a crane through the orientation adjustment mechanism;

The orientation adjustment mechanism includes an upper platform, a plurality of actuators, a plurality of movable pulleys, a flexible body and a plurality of guide pulleys, the upper platform is connected with the hook, and a plurality of the actuators and a plurality of the guide pulleys are respectively is arranged on the upper platform, a plurality of the movable pulleys are respectively arranged on the blade clamp, and the flexible body is connected with a plurality of the actuators, a plurality of the movable pulleys, a plurality of the guide pulleys and the upper platform.

Preferably, a plurality of said actuators are the first actuator, the second actuator, the third actuator and the fourth actuator, wherein the first actuator and the second actuator are arranged in On both sides of the upper platform, the third actuator is located between the first actuator and the second actuator, and the fourth actuator is located between the first actuator and the first actuator. side.

As a further preference, several of the guide pulleys include a first guide pulley and a second guide pulley, the first guide pulley is located on the other side of the first actuator, and the second guide pulley is located on the second actuator. side of the actuator.

Preferably, the flexible body is, but not limited to, a wire rope, a chain, and a sling.

As a further preference, the first actuator, the second actuator, the third actuator and the fourth actuator are all but not limited to electric reels and hydraulic reels.

Preferably, there are two or four movable pulleys.

A blade installation method for installing a wind power blade on a wind turbine hub located at a wind turbine tower top nacelle, the installation method comprising:

S1. Connect the blade clamp to the hook of the crane through the orientation adjustment mechanism, lift the blade clamp through the crane, and adjust the position of the blade clamp;

S2. Sleeve the blade clamp on one end of the wind power blade, and lift the wind power blade by the crane;

S3. Control the blade clamp through the orientation adjustment mechanism, so that the wind power blade rotates along the transverse axis direction of the wind power blade, and then adjust the position of the wind power blade;

S4, installing the wind turbine blade on the wind turbine hub through locking bolts;

S5. Remove the blade clamp.

A blade disassembly method for disassembling a wind turbine blade from a wind turbine hub at a wind turbine tower top nacelle, the disassembly method comprising:

S1. Connect the blade clamp to the hook of the crane through the orientation adjustment mechanism, lift the blade clamp through the crane, and adjust the position of the blade clamp;

S2. Sleeve the blade clamp on one end of the wind power blade, so that the blade clamp clamps the wind power blade;

S3, removing the wind power blade, the wind power blade is separated from the wind turbine hub;

S4, adjusting the position of the wind turbine blade;

S5. Place the wind turbine blade, and remove the blade clamp.

The above-mentioned technical scheme has the following advantages or beneficial effects:

(1) In this utility model, by setting the blade clamp and the setting of the orientation adjustment mechanism, it can be directly applied to the installation and installation of wind turbine blades without a gearbox or with a relatively small rotating gear, such as direct-drive and semi-direct-drive turbines. The disassembly work does not require the rotation of the turbine hub, which saves the installation and disassembly time of the barring, and can greatly improve the efficiency of blade installation and disassembly;

(2) In this utility model, the differential principle is used to adjust the posture of the wind turbine blade or the blade clamp, which can greatly reduce the size of the first actuator, the second actuator, the third actuator and the fourth actuator. power and size, thereby reducing overall weight and cost;

(3) In the present utility model, during the attitude adjustment process of the wind turbine blade or the blade clamp, the center of gravity of the wind turbine blade and the blade clamp is at the same point, and the lifting point and the aforementioned center of gravity are always on the same vertical line, and no additional counterweight is required To balance the center of gravity of the blade, the weight of the structure is greatly reduced.

Description of drawings

1 is a schematic diagram of the overall structure of a spreader capable of adjusting the aerial attitude of wind turbine blades in the present utility model;

Fig. 2 is the layout diagram of the upper platform in the present utility model;

Fig. 3 is the structural representation of the first guide pulley in the present invention;

4 is a schematic structural diagram of the present invention when the first wind turbine blade is installed;

5 is a schematic structural diagram of the present utility model when the second wind turbine blade is installed;

FIG. 6 is a schematic structural diagram of the present invention when the third wind turbine blade is installed.

In the figure: 1. Blade clamp; 2. Wind power blade; 201, First wind power blade; 202, Second wind power blade; 203, Third wind power blade; 3, Orientation adjustment mechanism; 301, Upper platform; 302, Lanyard; 303, the fourth actuator; 304, the first actuator; 305, the third actuator; 306, the second actuator; 307, the first movable pulley; 308, the second movable pulley; 309, the flexible body; 310 3101, the pulley; 3102, the lateral rotating bracket; 3103, the fixed bracket; 3104, the pin shaft; 3105, the rotating shaft; 311, the second guide pulley;

Detailed ways

The present utility model will be further described below with reference to the accompanying drawings and specific embodiments, but not as a limitation of the present utility model.

1 is a schematic diagram of the overall structure of a spreader capable of adjusting the aerial attitude of wind turbine blades in the present utility model, FIG. 2 is a layout diagram of an upper platform in the present utility model, and FIG. 3 is a schematic structural diagram of a first guide pulley in the present utility model. 4 is a schematic structural diagram of the present utility model when the first wind turbine blade is installed, FIG. 5 is a structural schematic diagram of the present utility model when the second wind turbine blade is installed, and FIG. 6 is a structural schematic diagram of the present utility model when the third wind turbine blade is installed, Please refer to FIG. 1 to FIG. 6 , which show a preferred embodiment, a sling that can adjust the attitude of wind power blades in the air, including: a blade clamp 1 and an orientation adjustment mechanism 3 , a blade clamp 1 It is connected to the hook of the crane through the orientation adjustment mechanism 3 . In this embodiment, the blade clamp 1 is used to clamp and fix the wind power blade 2 . The orientation adjustment mechanism 3 is used to adjust the direction and position of the blade clamp 1 and the wind turbine blade 2 . In this embodiment, both ends of the blade clamp 1 are provided with two clamping parts, and the two clamping parts are sleeved on both sides of the largest circumference of the wind turbine blade 2 , such as the left side of the wind turbine blade 2 shown in FIG. 1 . or the upper side of the wind turbine blade 2 shown in FIG. 4 . It is used to improve the force of the wind power blade 2 during the attitude adjustment process, and can prevent the blade root of the wind power blade 2 from being detached from the blade clamp 1 when the blade root is inclined downward over 30°. The center of gravity of the blade clamp 1 in this embodiment coincides with the center of gravity of the wind turbine blade 2 .

The orientation adjustment mechanism 3 includes an upper platform 301, a number of actuators, a number of movable pulleys, a flexible body 309 and a number of guide pulleys, the upper platform 301 is connected with a hook, and a number of actuators and a number of guide pulleys are respectively arranged on the upper platform 301. , a plurality of movable pulleys are respectively arranged on the blade clamp 1 , and the flexible body 309 is connected to a plurality of actuators, a plurality of movable pulleys, a plurality of guide pulleys and the upper platform 301 . In this embodiment, four hanging ropes 302 are fixed on the upper surface of the upper platform 301, and the four hanging ropes 302 are connected with the four included angles of the upper platform 301. The upper platform 301 is also provided with a generator and a control cabinet. , wire reel and other devices, the wire reel is used for retracting and placing the flexible body between the upper platform 301 and the blade clamp 1 . In this embodiment, a preset distance is set between the upper platform 301 and the hook.

Further, as a preferred embodiment, a plurality of actuators are the first actuator 304, the second actuator 306, the third actuator 305 and the fourth actuator 303, wherein the first actuator 304 and the second actuator 306 are arranged on both sides of the upper platform 301, the third actuator 305 is located between the first actuator 304 and the second actuator 306, and the fourth actuator 303 is located between the first actuator 304 and the second actuator 306. one side of actuator 304. In this embodiment, the first actuator 304 , the second actuator 306 , the third actuator 305 and the fourth actuator 303 are all arranged on the upper platform 301 , and the flexible body 309 is adjusted by the differential principle. Position or length, realize the orientation adjustment of blade clamp 1 and wind turbine blade 2.

Further, as a preferred embodiment, the plurality of guide pulleys include a first guide pulley 310 and a second guide pulley 311, the first guide pulley 310 is located on the other side of the first actuator 304, and the second guide pulley 311 is located on the other side of the first actuator 304. One side of the second actuator 306 .

Further, as a preferred embodiment, the flexible body 309 is, but not limited to, a wire rope, a chain, and a suspender. The flexible body 309 in this embodiment is preferably a steel wire rope.

Further, as a preferred embodiment, the first actuator 304 , the second actuator 306 , the third actuator 305 and the fourth actuator 303 are but not limited to electric reels and hydraulic reels . The first actuator 304 , the second actuator 306 , the third actuator 305 and the fourth actuator 303 in this embodiment are all preferably electric reels.

Further, as a preferred embodiment, there are two or four movable pulleys. In this embodiment, four movable pulleys are preferably set, and the plurality of movable pulleys include a first movable pulley 307, a second movable pulley 308, a third movable pulley (not shown in the figure) and a fourth movable pulley (not shown in the figure), as shown in FIG. 1 As shown, the first movable pulley 307 and the fourth movable pulley are respectively arranged at one end of the blade clamp 1, and the second movable pulley 308 and the third movable pulley are arranged at the other end of the blade clamp 1, wherein the first movable pulley 307 and the second movable pulley 308 are located in the blade On one side of the clamp 1, the third movable pulley and the fourth movable pulley are located on the other side of the blade clamp. Moreover, the first movable pulley 307 , the second movable pulley 308 , the third movable pulley and the fourth movable pulley are respectively connected with the blade clamp 1 through hinges, which can reduce the load of the flexible body 309 . Therefore, a thinner flexible body 309 can be selected to improve the flexibility of the flexible body 309 and make the overall mechanism run more smoothly. At the same time, the control accuracy of the first actuator 304 , the second actuator 306 , the third actuator 305 and the fourth actuator 303 on the orientation of the wind turbine blade 2 can also be improved. In this embodiment, one end of the flexible body 309 is connected to the fourth actuator 303, and the other end of the flexible body 309 passes through the fourth movable pulley, the first actuator 304, the third movable pulley, the first guide pulley 310, the first The three actuators 305 , the second guide pulley 311 , the second movable pulley 308 , the second actuator 306 , and the first movable pulley 307 are connected to the upper platform 301 . In this embodiment, when the flexible body 309 passes through the first actuator 304 , the third actuator 305 and the second actuator 306 , the flexible body 309 wraps around the first actuator 304 and the third actuator respectively. 305 and the second actuator 306 three to five turns. In this embodiment, the fourth actuator 303 is used to directly adjust the length of the flexible body 309 , while the first actuator 304 , the third actuator 305 , and the second actuator 306 operate to stabilize the wind turbine blade 2 Or the orientation position of the blade clamp 1 , so that the flexible body 309 on each side connected with the blade clamp 1 is extended or shortened, so as to achieve the purpose of adjusting the distance between the upper platform 301 and the blade clamp 1 .

The preferred installation method of the wind power blade in the present invention will be described below.

A blade (wind power blade) installation method for installing a wind power blade 2 on a wind turbine hub 4 located at a wind turbine tower top pod, the installation method comprising:

S1 , connect the blade clamp 1 to the hook of the crane through the orientation adjustment mechanism 3 , lift the blade clamp 1 by the crane, and adjust the position of the blade clamp 1 .

S2. Set the blade clamp 1 on one end of the wind power blade 2, and lift the wind power blade 2 by a crane.

S3. The blade clamp 1 is controlled by the orientation adjustment mechanism 3, so that the wind power blade 2 is rotated along the transverse axis direction of the wind power blade 2, and then the position of the wind power blade 2 is adjusted. In this embodiment, the transverse axis direction of the wind turbine blade 2 is based on the forward direction shown in FIG. 4 , FIG. 5 or FIG. 6 .

S4. Install the wind turbine blade 2 on the wind turbine hub 4 through locking bolts.

S5 , remove the blade clamp 1 . In this embodiment, the yaw of the wind turbine nacelle (not shown in the figure) is also included, so as to adapt to the installation and removal of the wind turbine blades 2 at different positions. The wind power blades 2 in this embodiment are a first wind power blade 201 , a second wind power blade 202 and a third wind power blade 203 . When the blade clamp 1 is lifted by a crane, at this time, the fourth actuator 303 operates to release the flexible body 309, while the first actuator 304, the third actuator 305 and the second actuator 306 operate to adjust The length of the flexible body 309 connected with the first movable pulley 307 , the second movable pulley 308 , the third movable pulley and the fourth movable pulley to maintain the horizontal state of the blade clamp 1 . At this time, the distance between the upper platform 301 and the blade clamp 1 continues to increase until the distance reaches 13m, the first actuator 304, the second actuator 306, the third actuator 305 and the fourth actuator 303 stops running. Then, the crane drives the blade clamp 1 to move to the blade storage position, and firstly clamps the first wind turbine blade 201 and lifts the first wind turbine blade 201 into the air, and then the first actuator 304 and the second actuator 306 operate, using the difference The moving principle makes the part of the flexible body 309 connected to the second moving pulley 308 and the third moving pulley on the blade root side of the first wind turbine blade 201 shorter, and the first moving pulley 307 and the fourth moving pulley on the tip side of the first wind turbine blade 201 become shorter. The side length of the part of the flexible body 309 connected by the movable pulley. Specifically, as shown in FIG. 4 , the blade root of the first wind turbine blade 201 is raised and the blade tip is lowered until the horizontal axis of the first wind turbine blade 201 is about 85° from the horizontal direction, and then the crane drives the blade clamp 1 to move the first wind turbine blade 201. The blade 201 is moved to just below the vertical downward installation position of the wind turbine hub 4, and after the installation is in place, the first wind turbine blade 201 and the wind turbine hub 4 are fixed by locking bolts, and finally the blade clamp 1 is removed. . When the second wind turbine blade 202 needs to be installed, the second wind turbine blade 202 needs to be installed on the wind turbine hub 4 by yawing the wind turbine nacelle clockwise by about 80°, and then repeating the above steps of installing the first wind turbine blade 201. When the third wind turbine blade 203 needs to be installed, it is necessary to yaw the wind turbine nacelle by about 160° counterclockwise, and then repeat the above steps of installing the first wind turbine blade 201 to fix the third wind turbine blade 203 on the wind turbine hub 4. In this embodiment, the lateral axis of the first wind turbine blade 201 , the lateral axis of the second wind turbine blade 202 and the lateral axis of the third wind turbine blade 203 are parallel, and the lateral axis of the first wind turbine blade 201 is parallel to the center line of the first wind turbine blade 201 The direction is vertical, the transverse axis of the second wind turbine blade 202 is perpendicular to the centerline direction of the second wind turbine blade 202 , and the transverse axis of the third wind turbine blade 203 is perpendicular to the centerline direction of the third wind turbine blade 203 . The rotation direction of the second wind turbine blade 202 around its lateral axis is the same as the rotation direction of the third wind turbine blade 203 around its lateral axis, and the rotation direction of the first wind turbine blade 201 around its lateral axis is the same as the rotation direction of the second wind turbine blade 202 around its lateral axis. The axis rotates in the opposite direction. The absolute value of the angle at which the first wind turbine blade 201 rotates around its lateral axis is 90°, the absolute value of the angle at which the second wind turbine blade 202 rotates around its lateral axis, and the absolute value of the angle at which the third wind turbine blade 203 rotates around its lateral axis Both are 60°.

The preferred disassembly method of the wind turbine blade in the present invention will be described below.

A blade (wind power blade) disassembly method for dismantling the wind power blade 2 from the wind turbine hub 4 at the wind turbine tower top pod, the disassembly method comprising:

S1 , connect the blade clamp 1 to the hook of the crane through the orientation adjustment mechanism 3 , lift the blade clamp 1 by the crane, and adjust the position of the blade clamp 1 .

S2, the blade clamp 1 is sleeved on one end of the wind power blade 2, so that the blade clamp 1 clamps the wind power blade 2.

S3 , the wind power blade 2 is removed, and the wind power blade 2 is separated from the wind turbine hub 4 .

S4 , adjust the position of the wind turbine blade 2 .

S5 , place the wind turbine blade 2 , and remove the blade clamp 1 . In this embodiment, when disassembling the first wind turbine blade 201 , the second wind turbine blade 202 or the third wind turbine blade 203 , it is only necessary to connect the blade clamp 1 to the hook of the crane through the orientation adjustment mechanism 3 and adjust the blade clamp 1 appropriately The position of the blade clamp 1 is adjusted in the same manner as when the first wind turbine blade 201 is installed. Then, clamp the first wind turbine blade 201, the second wind turbine blade 202 or the third wind turbine blade 203 by the blade clamp 1, and finally loosen the locking bolts to directly connect the first wind turbine blade 201, the second wind turbine blade 202 or the third wind turbine blade 203. The third wind turbine blade 203 is removed. The method for disassembling the wind power blade 2 in this embodiment is suitable for disassembling the wind power blade 2 in the range of +60° to -240°. Specifically, when disassembling the wind power blade 2 in the range of 0° to -180°, it is necessary to The distance between the upper platform 301 and the blade clamp 1 is adjusted to 13m. When disassembling the wind turbine blades 2 in the range of 0° to +60° and -180° to -240°, the distance between the upper platform 301 and the blade clamp 1 needs to be adjusted to 7m.

In the present utility model, in order to better adapt to the positions of different wind power blades 2, the present utility model also provides a rotating action around the horizontal axis of the wind power blade 2 or the blade clamp 1. The principle is as follows: the third actuator is operated 305, using Differential principle, adjust the length of the flexible body 309 on both sides of the third actuator 305, so that the wind power blade 2 or the blade clamp 1 on the side where the flexible body 309 is shortened is raised, and the wind power blade 2 on the side where the flexible body 309 is elongated is raised Or the blade clamp 1 is lowered, so as to achieve the purpose of rotating the wind turbine blade 2 or the blade clamp 1 . While the third actuator 305 operates, the first actuator 304 and the second actuator 306 operate simultaneously to maintain the oriented position of the wind turbine blade 2 or blade clamp 1 about its transverse axis.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the implementation and protection scope of the present invention.

The present invention further has the following embodiments on the basis of the above-mentioned embodiments.

As an embodiment, both the first guide pulley 310 and the second guide pulley 311 include: a pulley 3101, a lateral rotation bracket 3102 and a fixed bracket 3103, wherein the pulley 3101 is mounted on the lateral rotation bracket 3102 through a pin 3104, And along with the rotation of the side rotation bracket 3102 , the side rotation bracket 3102 is disposed on the fixed bracket 3103 through the rotation shaft 3105 , and the side rotation bracket 3102 can rotate relative to the fixed bracket 3103 . The flexible body 309 runs through the axis of the rotating shaft 3105 .

As an embodiment, the clear distance between the first actuator 304 and the second actuator 306 is the same as the clear distance between the second movable pulley 308 and the third movable pulley, and between the second movable pulley 308 and the third movable pulley The clear distance is the same as the clear distance between the first movable pulley 307 and the fourth movable pulley.

As an embodiment, the first movable pulley 307 and the fourth movable pulley are on the same horizontal plane, and the plane where the first movable pulley 307 and the fourth movable pulley are located is higher than the plane where the horizontal axis of the blade clamp 1 is located. In this embodiment, the clear distance between the first movable pulley 307 and the second movable pulley 308 is greater than the clear distance between the first movable pulley 307 and the fourth movable pulley. The clear distance between the third movable pulley and the fourth movable pulley is greater than the clear distance between the second movable pulley 308 and the third movable pulley. In this embodiment, the plane where the first movable pulley 307 and the fourth movable pulley are located is 0.8 m higher than the plane where the horizontal axis of the blade clamp 1 is located.

As an embodiment, the second movable pulley 308 and the third movable pulley are on the same horizontal plane, and the plane where the second movable pulley 308 and the third movable pulley are located is lower than the plane where the horizontal axis of the blade clamp 1 is located. In this embodiment, the plane where the second movable pulley 308 and the third movable pulley are located is 3 m lower than the plane where the horizontal axis of the blade clamp 1 is located.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the implementation and protection scope of the present invention. Those skilled in the art should be able to realize that any application of the description and illustrations of the present invention has The solutions obtained from equivalent substitutions and obvious changes should be included in the protection scope of the present invention.

Claims (6)

1. The utility model provides a can adjust hoist of wind-powered electricity generation blade attitude in air which characterized in that includes: the blade clamp is connected with a lifting hook of the crane through the orientation adjusting mechanism;

the orientation adjusting mechanism comprises an upper platform, a plurality of actuators, a plurality of movable pulleys, a flexible body and a plurality of guide pulleys, wherein the upper platform is connected with the lifting hook, the plurality of actuators and the plurality of guide pulleys are respectively arranged on the upper platform, the plurality of movable pulleys are respectively arranged on the blade clamp, and the flexible body is connected with the plurality of actuators, the plurality of movable pulleys, the plurality of guide pulleys and the upper platform.

2. The wind blade aerial attitude adjustment spreader of claim 1, wherein a number of said actuators are a first actuator, a second actuator, a third actuator and a fourth actuator, wherein said first and second actuators are disposed on both sides of said upper platform, said third actuator is located between said first and second actuators, and said fourth actuator is located on one side of said first actuator.

3. The wind turbine blade aerial attitude adjustment spreader of claim 2, wherein the plurality of guide pulleys includes a first guide pulley and a second guide pulley, the first guide pulley being located on the other side of the first actuator, and the second guide pulley being located on one side of the second actuator.

4. The lifting appliance capable of adjusting the air attitude of the wind power blade of claim 1, wherein the flexible body is a steel wire rope, a chain or a sling.

5. The wind blade aerial attitude adjustment spreader of claim 2, wherein the first actuator, the second actuator, the third actuator, and the fourth actuator are all electric drums or hydraulic drums.

6. The lifting appliance capable of adjusting the air attitude of the wind power blade as claimed in claim 1, wherein the number of the movable pulleys is two or four.

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