A wind turbine hoisting device and a hoisting method

Abstract

The present invention relates to the field of hoisting technology, and specifically to a hoisting device and a hoisting method for a wind turbine unit, including a central connection seat, a clamping part, a flipping part, a triggering part, and a shock absorption part. The clamping part is fixedly installed on the periphery of the central connection seat, with a quantity of three. The flipping part is fixedly arranged on the top of the central connection seat, the triggering part is fixedly arranged on the surface of the flipping part, and the shock absorption part is fixedly arranged inside the flipping part. After the wind turbine blade assembly is hoisted to an appropriate height, the pulley of the flipping part is triggered by the triggering part to slide along the path groove towards the direction close to the electric cylinder, causing the position of the pulley to deviate from the center of this hoisting device, resulting in the imbalance of this hoisting device and the clamped wind turbine blade assembly, and then causing it to flip until the pulley slides to the other end of the path groove, and the wind turbine blade assembly flips into an upright state, so as to be docked with the end connection flange of the main shaft of the wind turbine unit, improving the convenience of installing the wind turbine blade assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of hoisting, and particularly to a hoisting device and a hoisting method for a wind turbine unit. Background Art

[0002] A wind turbine is a power generation device that converts the kinetic energy of air flow into mechanical energy by humans using natural wind energy, and is connected to and drives a generator to operate for power generation. Since the wind turbine unit is relatively tall, hoisting equipment is required for installing the wind turbine unit;

[0003] Referring to a Chinese patent with the application number 201810608428.2, a self-lifting hoisting device for a wind turbine unit and its working method are disclosed. After positioning by the first positioning mechanism and firm installation, the hoisting work starts, realizing the simplification of the structure of the self-lifting hoisting device, facilitating operation, and having high positioning strength after the hoisting platform is hoisted to the working position, greatly promoting the application of new technologies in the field of wind power operation and maintenance; and due to the large size of the wind turbine blade assembly, it is usually difficult to erect it after being assembled on the ground. Therefore, in the prior art, the wind turbine blade assembly is generally hoisted to a certain height and then erected and flipped in the air. This requires the use of two sets of lifting arms. After the wind turbine blade assembly is hoisted to a certain height by the two sets of lifting arms, one set of lifting arms lifts one blade upward to assist in the erection and flipping of the wind turbine blade, resulting in a large dependence on hoisting equipment, high hoisting costs, and low hoisting convenience. For this reason, we propose a hoisting device and a hoisting method for a wind turbine unit to solve the above technical problems. Summary of the Invention

[0004] The present invention provides the following technical solutions: A hoisting device for a wind turbine unit, comprising:

[0005] A central connection seat;

[0006] A clamping part, fixedly installed on the periphery of the central connection seat, with a quantity of three, and the clamping part is used for clamping the wind turbine blade;

[0007] A flipping part, fixedly arranged on the top of the central connection seat, for hoisting the wind turbine blade;

[0008] A triggering part, fixedly arranged on the surface of the flipping part, for triggering the flipping of the wind turbine blade;

[0009] A damping part, fixedly arranged inside the flipping part, for damping the wind turbine blade.

[0010] As a preferred solution of the present invention, the clamping part includes:

[0011] A connecting plate, fixedly installed on the side of the central connection seat;

[0012] A picking plate, fixedly installed at the bottom of the connecting plate;

[0013] The fixing frame is symmetrically and fixedly installed on the top of the cantilever board with respect to the central axis of the cantilever board;

[0014] The clamping device is fixedly installed between the two fixing frames. The clamping device is used for clamping the wind power blade, and rubber pads are arranged on the clamping jaws of the clamping device for buffering and protecting the wind power blade.

[0015] As a preferred solution of the present invention, the flipping part includes:

[0016] The fixing blocks are fixedly installed on the top of the central connection seat, and the number is two. The two fixing blocks are symmetrically distributed with respect to the central axis of the central connection seat;

[0017] The mounting plate is fixedly installed on the top of the two fixing blocks;

[0018] The flipping arm is fixedly installed on the top of the mounting plate. The middle part of the flipping arm is bent downward by 60 degrees;

[0019] The path groove is opened inside the flipping arm;

[0020] The pulley is slidably installed inside the path groove. The initial position of the pulley is located at the top of the center point of the central connection seat;

[0021] The shaft rod is rotatably installed inside the pulley through a bearing;

[0022] The U-shaped lifting lug is fixedly installed on the periphery of the shaft rod.

[0023] As a preferred solution of the present invention, the triggering part includes:

[0024] The first bearing seat is fixedly installed at the bottom of the mounting plate and located between the two fixing blocks;

[0025] The positioning pin is rotatably installed inside the first bearing seat;

[0026] The triggering flap is fixedly installed at the front end and the rear end of the outer wall of the positioning pin in a front-back symmetric distribution form;

[0027] The pushing groove is opened on the top of the triggering flap. The inner wall of the pushing groove is slidably connected to the outer wall of the pulley.

[0028] As a preferred solution of the present invention, the triggering part further includes:

[0029] The torsion bolt rod is fixedly installed between the two triggering flaps and located on the top of the positioning pin;

[0030] The second bearing seats are fixedly installed at the bottom of the flipping arm in a front-back symmetric distribution form and close to the bending position of the flipping arm;

[0031] An electric cylinder is hinged between two second bearing seats through a shaft pin, and the end of the output rod of the electric cylinder is hinged to the outer wall of the torsion bolt rod through a spherical eye joint.

[0032] As a preferred solution of the present invention, the shock absorption part includes:

[0033] Placement grooves are opened on the bottom wall and the top wall of the path groove;

[0034] Shock absorption air bags are respectively fixedly installed inside the upper and lower placement grooves. The inside of the shock absorption air bags is communicated with the inside of the placement grooves, and the outer surfaces of the upper and lower shock absorption air bags are mutually attached;

[0035] Exhaust holes are opened at the top and bottom of the flipping arm and at one end far from the mounting plate. The inside of the exhaust holes is communicated with the inside of the placement grooves;

[0036] An electromagnetic pressure relief valve is fixedly installed on the side of the central connecting seat through a sheet metal bracket;

[0037] An air pipe is fixedly installed between the exhaust hole and the input end of the electromagnetic pressure relief valve through a joint.

[0038] As a preferred solution of the present invention, the shock absorption part further includes:

[0039] Inflation holes are opened at the top and bottom of the flipping arm and near the bending position of the flipping arm. The inside of the inflation holes is communicated with the inside of the path groove;

[0040] A valve nozzle is screwed inside the inflation hole.

[0041] As a preferred solution of the present invention, the shock absorption part further includes:

[0042] A cord fabric layer is fixedly installed on the inner wall of the shock absorption air bag and is woven by multiple layers of cords distributed longitudinally and transversely. The cord fabric layer is used for internal support of the shock absorption air bag.

[0043] As a preferred solution of the present invention, the shock absorption air bag is made of flexible industrial rubber, and the thickness of the shock absorption air bag is equal to the depth of the placement groove.

[0044] A hoisting method for a hoisting device of a wind turbine generator set includes the following steps:

[0045] S1. Hook the top of the flipping part with the winch end hook of a large crane, grip and hold the wind power blade through three clamping parts, and hoist the wind power blade assembly upward;

[0046] S2. After the wind turbine blade assembly is lifted to an appropriate height, the output rod of the electric cylinder contracts. Further, under the connection action of the torsion bolt rod, the two trigger flaps are driven to rotate 90 degrees in the direction close to the electric cylinder along the connection between the positioning pin and the first bearing seat. The rotation of the trigger flaps drives the push slot to rotate together. During the rotation of the push slot, its inner wall will push the pulley to slide along the path slot in the direction close to the electric cylinder, causing the position of the pulley to deviate from the center of this hoisting device, and the hoisting device and the clamped wind turbine blade assembly to become unbalanced, so that the pulley continues to slide along the inner wall of the path slot until the pulley slides to the other end of the path slot, and the wind turbine blade assembly flips into an upright state;

[0047] S3. During the sliding of the pulley along the inner wall of the path slot, the upper and lower shock-absorbing air bags will also be squeezed, squeezing the air inside the upper and lower shock-absorbing air bags towards the end close to the exhaust hole, and slowly squeezing the air inside the upper and lower shock-absorbing air bags through the electromagnetic pressure relief valve, so that the pulley slides slowly along the inner wall of the path slot, and the wind turbine blade assembly slowly flips 90 degrees.

[0048] Compared with the prior art, the beneficial effects of the present invention are:

[0049] 1. In the present invention, after the wind turbine blade assembly is lifted to an appropriate height, the pulley of the flipping part is triggered by the triggering part to slide along the path slot in the direction close to the electric cylinder, causing the position of the pulley to deviate from the center of this hoisting device, resulting in the imbalance of this hoisting device and the clamped wind turbine blade assembly, and then flipping occurs until the pulley slides to the other end of the path slot, and the wind turbine blade assembly flips into an upright state, so as to be docked with the end connection flange of the main shaft of the wind turbine generator set, improving the convenience of installing the wind turbine blade assembly.

[0050] 2. In the present invention, during the sliding of the pulley along the inner wall of the path slot, the upper and lower shock-absorbing air bags will also be squeezed, squeezing the air inside the upper and lower shock-absorbing air bags towards the end close to the exhaust hole, and slowly squeezing the air inside the upper and lower shock-absorbing air bags through the electromagnetic pressure relief valve, so that the pulley slides slowly along the inner wall of the path slot, so as to prevent the wind turbine blade assembly from flipping too fast and causing danger. At the same time, it also slows down the impact force when the outer wall of the pulley contacts the inner wall of the other end of the path slot, so as to prevent the deformation of the wind turbine blade and avoid property losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 is a schematic structure of the present invention Figure 1 ;

[0052] Figure 2 is a schematic structure of the present invention Figure 2 ;

[0053] Figure 3 is a schematic structural diagram of the flipping part in the present invention;

[0054] Figure 4 In the present invention Figure 3 partial structural schematic diagram;

[0055] Figure 5 In the present invention Figure 4 local structural schematic diagram;

[0056] Figure 6 Structural schematic diagram of the triggering part in the present invention;

[0057] Figure 7 Structural schematic diagram of the shock absorption part in the present invention;

[0058] Figure 8 In the present invention Figure 7 amplified structural schematic diagram of part A;

[0059] Figure 9 Structural schematic diagram of the flip arm in the present invention;

[0060] Figure 10 Cross-sectional structural schematic diagram of the shock absorption airbag in the present invention;

[0061] Figure 11 Structural schematic of the present invention Figure 3 ;

[0062] Figure 12 Structural schematic of the present invention Figure 4 .

[0063] In the figure: 100, central connection seat; 200, clamping part; 201, connecting plate; 202, pick plate; 203, fixing frame; 204, clamping device; 300, flipping part; 301, fixing block; 302, mounting plate; 303, flip arm; 304, path groove; 305, pulley; 306, shaft rod; 307, U-shaped lifting lug; 400, triggering part; 401, first bearing seat; 402, positioning pin; 403, triggering flap; 404, pushing groove; 405, torsion bolt rod; 406, second bearing seat; 407, electric cylinder; 500, shock absorption part; 501, placement groove; 502, shock absorption airbag; 503, exhaust hole; 504, electromagnetic pressure relief valve; 505, air pipe; 506, inflation hole; 507, valve nozzle; 508, cord fabric layer. Detailed implementation manners

[0064] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0065] Please refer to Figures 1 to 12 , the technical solution provided by the present invention specifically includes the following embodiments:

[0066] A hoisting device for a wind turbine, including a central connection seat 100, a clamping part 200, a flipping part 300, a triggering part 400 and a shock-absorbing part 500. The clamping part 200 is fixedly installed on the periphery of the central connection seat 100, with a quantity of three. The clamping part 200 is used for clamping wind turbine blades. The flipping part 300 is fixedly arranged on the top of the central connection seat 100 and is used for hoisting wind turbine blades. The triggering part 400 is fixedly arranged on the surface of the flipping part 300 and is used for triggering the flipping of wind turbine blades. The shock-absorbing part 500 is fixedly arranged inside the flipping part 300 and is used for damping wind turbine blades.

[0067] Further, specifically refer to Figure 2 as shown:

[0068] The clamping part 200 includes a connecting plate 201, a picking plate 202, a fixing frame 203 and a clamping device 204. The connecting plate 201 is fixedly installed on the side of the central connection seat 100. The picking plate 202 is fixedly installed at the bottom of the connecting plate 201. The fixing frame 203 is symmetrically fixedly installed on the top of the picking plate 202 with the central axis of the picking plate 202 as the symmetry axis. The clamping device 204 is fixedly installed between the two fixing frames 203. The clamping device 204 is used for clamping wind turbine blades, and rubber gaskets are arranged on the clamping jaws of the clamping device 204.

[0069] Specifically, hook the top of the U-shaped lifting lug 307 with the hoisting end hook of a large crane (as shown in the attachment Figure 1 ), lift this hoisting device directly above the wind turbine blade assembly, and align the three clamping parts 200 with the three blades of the wind turbine blade assembly. Lower this hoisting device by the hoisting end of the crane, so that the clamping jaws of the clamping devices 204 of the three clamping parts 200 are respectively located outside the three blades. Drive the clamping jaws to contract through the output parts of the three clamping devices 204 (the clamping device 204 is a prior art means, and its specific structure and principle will not be described in detail), clamp and grip the wind turbine blade. Subsequently, lift this hoisting device by the hoisting end of the crane and lift the wind turbine blade assembly upward.

[0070] Further, specifically refer to Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 8 as shown:

[0071] The flipping part 300 includes a fixed block 301, a mounting plate 302, a flipping arm 303, a path groove 304, a pulley 305, a shaft rod 306 and a U-shaped lifting lug 307. The fixed block 301 is fixedly installed on the top of the central connection seat 100, and the number is two. The two fixed blocks 301 are symmetrically distributed about the central axis of the central connection seat 100. The mounting plate 302 is fixedly installed on the top of the two fixed blocks 301. The flipping arm 303 is fixedly installed on the top of the mounting plate 302. The middle part of the flipping arm 303 is bent downward by 60 degrees. The path groove 304 is opened inside the flipping arm 303. The pulley 305 is slidably installed inside the path groove 304. The initial position of the pulley 305 is at the top of the center point of the central connection seat 100. The shaft rod 306 is rotatably installed inside the pulley 305 through a bearing. The U-shaped lifting lug 307 is fixedly installed on the periphery of the shaft rod 306;

[0072] The triggering part 400 includes a first bearing seat 401, a positioning pin 402, a triggering flap 403, a pushing groove 404, a torsion bolt rod 405, a second bearing seat 406 and an electric cylinder 407. The first bearing seat 401 is fixedly installed at the bottom of the mounting plate 302 and is located between the two fixed blocks 301. The positioning pin 402 is rotatably installed inside the first bearing seat 401. The triggering flaps 403 are fixedly installed at the front end and the rear end of the outer wall of the positioning pin 402 in a front-back symmetrical distribution form. The pushing groove 404 is opened on the top of the triggering flap 403. The inner wall of the pushing groove 404 is slidably connected to the outer wall of the pulley 305. The torsion bolt rod 405 is fixedly installed between the two triggering flaps 403 and is located on the top of the positioning pin 402. The second bearing seats 406 are fixedly installed at the bottom of the flipping arm 303 in a front-back symmetrical distribution form and are close to the bending position of the flipping arm 303. The electric cylinder 407 is hinged between the two second bearing seats 406 through a shaft pin. The end of the output rod of the electric cylinder 407 is hinged to the outer wall of the torsion bolt rod 405 through a ball eye joint.

[0073] Specifically, when the wind turbine blade assembly is lifted to a suitable height, the output rod of the electric cylinder 407 contracts. Further, under the connection action of the torsion bolt rod 405, the two triggering flaps 403 are driven to rotate 90 degrees in the direction close to the electric cylinder 407 along the connection point of the positioning pin 402 and the first bearing seat 401. At the same time, the rotation of the triggering flap 403 drives the pushing groove 404 to rotate together. During the rotation of the pushing groove 404, its inner wall will push the pulley 305 to slide along the path groove 304 in the direction close to the electric cylinder 407, so that the position of the pulley 305 deviates from the center of this hoisting equipment, resulting in the imbalance of this hoisting equipment and the clamped wind turbine blade assembly, and then causing it to flip. When the triggering flap 403 rotates 90 degrees, the pushing groove 404 is separated from the outer wall of the pulley 305. After that, under the gravity of this hoisting equipment and the wind turbine blade assembly, the pulley 305 continues to slide along the inner wall of the path groove 304 until the pulley 305 slides to the other end of the path groove 304 (as shown in the appendixFigure 11 and the attached Figure 12 at the position shown. At this time, the wind power blade assembly is flipped into an upright state to be butt - jointed with the end - connecting flange of the main shaft of the wind turbine generator, improving the convenience of installing the wind power blade assembly.

[0074] Further, specifically referring to Figure 3 , Figure 4 , Figure 7 , Figure 9 and Figure 10 shown as follows:

[0075] The shock - absorbing part 500 includes a placement groove 501, a shock - absorbing airbag 502, an exhaust hole 503, an electromagnetic pressure - relief valve 504, an air pipe 505, an inflation hole 506, a valve nozzle 507 and a cord fabric layer 508. The placement groove 501 is opened on the bottom wall and the top wall of the path groove 304. The shock - absorbing airbags 502 are respectively fixedly installed inside the upper and lower placement grooves 501. The inside of the shock - absorbing airbag 502 is communicated with the inside of the placement groove 501, and the outer surfaces of the upper and lower shock - absorbing airbags 502 are mutually attached. The shock - absorbing airbag 502 is made of flexible industrial rubber, and the thickness of the shock - absorbing airbag 502 is equal to the depth of the placement groove 501. The exhaust hole 503 is opened at the top and bottom of the flipping arm 303 and at the end far from the mounting plate 302. The inside of the exhaust hole 503 is communicated with the inside of the placement groove 501. The electromagnetic pressure - relief valve 504 is fixedly installed on the side of the central connection seat 100 through a sheet - metal bracket. The air pipe 505 is fixedly installed between the exhaust hole 503 and the input end of the electromagnetic pressure - relief valve 504 through a joint. The inflation hole 506 is opened at the top and bottom of the flipping arm 303 and near the bending position of the flipping arm 303. The inside of the inflation hole 506 is communicated with the inside of the path groove 304. The valve nozzle 507 is screwed inside the inflation hole 506.

[0076] Specifically, before use, it is connected to the valve stem 507 through the air pump pipeline, and sufficient air is filled into the inside of the shock-absorbing airbag 502 through the inflation hole 506 to make it expand. When the pulley 305 slides along the inner wall of the path groove 304, the upper and lower shock-absorbing airbags 502 are squeezed, and the air inside the upper and lower shock-absorbing airbags 502 is squeezed towards one end close to the exhaust hole 503, resulting in an increase in the internal pressure of the two shock-absorbing airbags 502. The air inside the shock-absorbing airbag 502 is connected to the input end of the electromagnetic pressure relief valve 504 through the exhaust hole 503 and the air pipe 505. Therefore, when the air pressure value inside the shock-absorbing airbag 502 triggers the pressure relief value of the electromagnetic pressure relief valve 504, the valve of the electromagnetic pressure relief valve 504 opens. Thus, during the sliding of the pulley 305 along the inside of the path groove 304, the air inside the upper and lower shock-absorbing airbags 502 is slowly squeezed out through the electromagnetic pressure relief valve 504. And because the air inside the upper and lower shock-absorbing airbags 502 is slowly released, that is to say, the sliding speed of the pulley 305 along the inner wall of the path groove 304 is also slow, so as to prevent the wind turbine blade assembly from flipping too fast and causing danger. At the same time, it also slows down the impact force when the outer wall of the pulley 305 contacts the inner wall at the other end of the path groove 304, so as to prevent the deformation of the wind turbine blade and avoid property losses.

[0077] A hoisting method for a wind turbine hoisting device includes the following steps:

[0078] S1. Hook the top of the flipping part 300 with the hoisting end hook of a large crane, and grip the wind turbine blade with three clamping parts 200, and hoist the wind turbine blade assembly upward;

[0079] S2. When the wind turbine blade assembly is hoisted to an appropriate height, the output rod of the electric cylinder 407 contracts, and further drives the two trigger flaps 403 to rotate 90 degrees towards the direction close to the electric cylinder 407 along the connection between the positioning pin 402 and the first bearing seat 401 under the connection action of the torsion bolt rod 405. The rotation of the trigger flap 403 drives the push slot 404 to rotate together. During the rotation of the push slot 404, its inner wall will push the pulley 305 to slide along the path groove 304 towards the direction close to the electric cylinder 407, so that the position of the pulley 305 deviates from the center of this hoisting device, and the hoisting device and the clamped wind turbine blade assembly are unbalanced, making the pulley 305 continue to slide along the inner wall of the path groove 304 until the pulley 305 slides to the other end of the path groove 304, and the wind turbine blade assembly flips into an upright state;

[0080] S3. During the sliding of the pulley 305 along the inner wall of the path groove 304, the upper and lower shock-absorbing airbags 502 will also be squeezed, and the air inside the upper and lower shock-absorbing airbags 502 will be squeezed towards one end close to the exhaust hole 503, and the air inside the upper and lower shock-absorbing airbags 502 will be slowly squeezed out through the electromagnetic pressure relief valve 504, so that the pulley 305 slides slowly along the inner wall of the path groove 304, and the wind turbine blade assembly slowly flips 90 degrees.

[0081] When a wind turbine hoisting device in this solution is working, it is divided into the following processes:

[0082] Clamping of the wind turbine blade assembly: Hook the top of the U-shaped lifting lug 307 with the winch end hook of the large crane (as shown in the attachment Figure 1 ), hoist this hoisting device directly above the wind turbine blade assembly, and align the three clamping parts 200 with the three blades of the wind turbine blade assembly. Release this hoisting device downward through the winch end of the crane, so that the clamping jaws of the clamping devices 204 of the three clamping parts 200 are respectively located outside the three blades. Drive the clamping jaws to contract through the output parts of the three clamping devices 204 to clamp and grip the wind turbine blade. Subsequently, lift this hoisting device by the winch end of the crane, thereby lifting the wind turbine blade assembly upward;

[0083] Flipping of the wind turbine blade assembly: When the wind turbine blade assembly is hoisted to an appropriate height, contract the output rod of the electric cylinder 407. Further, under the connection action of the torsion bolt rod 405, drive the two trigger flaps 403 to rotate 90 degrees along the transfer joint of the positioning pin 402 and the first bearing seat 401 towards the direction close to the electric cylinder 407. At the same time, the rotation of the trigger flap 403 drives the push slot 404 to rotate together. During the rotation of the push slot 404, its inner wall will push the pulley 305 to slide along the path slot 304 towards the direction close to the electric cylinder 407, causing the position of the pulley 305 to deviate from the center of this hoisting device, resulting in the imbalance of this hoisting device and the clamped wind turbine blade assembly, and then causing it to flip. When the trigger flap 403 rotates 90 degrees, the push slot 404 will separate from the outer wall of the pulley 305. After that, under the gravity of this hoisting device and the wind turbine blade assembly, the pulley 305 continues to slide along the inner wall of the path slot 304 until the pulley 305 slides to the other end of the path slot 304 (as shown in the attachment Figure 11 and the attachment Figure 12 ), at this time, the wind turbine blade assembly flips into an upright state to facilitate docking with the end connection flange of the main shaft of the wind turbine, improving the convenience of installing the wind turbine blade assembly;

[0084] It should be noted that during the sliding of the pulley 305 along the inner wall of the path groove 304, the upper and lower shock-absorbing air bags 502 will also be squeezed, and the air inside the upper and lower shock-absorbing air bags 502 will be squeezed towards one end close to the exhaust hole 503, resulting in an increase in the internal pressure of the two shock-absorbing air bags 502. The air inside the shock-absorbing air bags 502 is connected to the input end of the electromagnetic pressure relief valve 504 through the exhaust hole 503 and the air pipe 505. Therefore, when the air pressure value inside the shock-absorbing air bag 502 triggers the pressure relief value of the electromagnetic pressure relief valve 504, the valve of the electromagnetic pressure relief valve 504 opens. Thus, during the sliding of the pulley 305 along the inside of the path groove 304, the air inside the upper and lower shock-absorbing air bags 502 is slowly squeezed out through the electromagnetic pressure relief valve 504. And because the air inside the upper and lower shock-absorbing air bags 502 is slowly released, that is to say, the sliding speed of the pulley 305 along the inner wall of the path groove 304 is also slow, so as to prevent the wind power blade assembly from flipping too fast and causing danger. At the same time, it also slows down the impact force when the outer wall of the pulley 305 contacts the inner wall at the other end of the path groove 304, so as to prevent the wind power blade from deforming and avoid property losses.

[0085] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A wind turbine hoisting device, characterized in that: include: A central connecting seat (100); a clamping portion (200) fixedly mounted on the periphery of the central connecting seat (100), the number of which is three, the clamping portion (200) being used for clamping wind turbine blades, the clamping portion (200) comprising: a connecting plate (201) fixedly mounted on the side of the central connecting seat (100); a lifting plate (202) fixedly mounted on the bottom of the connecting plate (201); a fixing frame (203) fixedly mounted on the top of the lifting plate (202) symmetrically with the central axis of the lifting plate (202); a clamping device (204) fixedly mounted between the two fixing frames (203), the clamping device (204) being used for clamping wind turbine blades, the clamping claws of the clamping device (204) being provided with rubber pads for wind turbine blades. The invention relates to a buffer protection for wind turbine blades; a flip part (300) fixedly mounted on the top of a central connection seat (100) and used for hoisting wind turbine blades, wherein the flip part (300) comprises: a fixing block (301) fixedly mounted on the top of the central connection seat (100), and the number of the fixing blocks (301) is two, and the two fixing blocks (301) are symmetrically distributed about the central axis of the central connection seat (100); a mounting plate (302) fixedly mounted on the top of the two fixing blocks (301); a flip arm (303) fixedly mounted on the top of the mounting plate (302), and the middle part of the flip arm (303) is bent downward at 60 degrees; a path groove (304) is provided inside the flip arm (303); a pulley (305) is slidably mounted in the path groove (304), the pulley (305) is initially located at the top of the center point of the central connecting seat (100); the shaft (306) is rotatably mounted inside the pulley (305) through a bearing; the U-shaped lifting lug (307) is fixedly mounted on the periphery of the shaft (306); the trigger part (400) is fixedly arranged on the surface of the flipping part (300) and is used to trigger the flipping of the wind turbine blade, the trigger part (400) comprising: a No. 1 bearing seat (401) fixedly mounted on the bottom of the mounting plate (302) and located between the two fixing blocks (301); a positioning pin (402) is rotatably mounted inside the No. 1 bearing seat (401); a trigger flap (403) is fixedly mounted on the positioning pin (403) in a front-rear symmetrical distribution. 402); a push-pull groove (404) is provided at the top of the trigger flap (403), and the inner wall of the push-pull groove (404) is slidably connected to the outer wall of the pulley (305); the trigger part (400) further comprises: a torsion bolt rod (405) fixedly mounted between the two trigger flaps (403) and located at the top of the positioning pin (402); a No. 2 bearing seat (406) fixedly mounted at the bottom of the flip arm (303) in a front-to-back symmetrical distribution and close to the bending position of the flip arm (303); an electric cylinder (407) is hinged between the two No. 2 bearing seats (406) through an axle pin, and the output rod end of the electric cylinder (407) is hinged to the outer wall of the torsion bolt rod (405) through a fisheye joint;The shock absorbing part (500) is fixedly arranged inside the flip part (300) and is used for shock absorbing of the wind turbine blade. ; 2. A wind turbine hoisting device according to claim 1, characterized in that: The shock absorbing part (500) comprises: a placement groove (501) provided on the bottom wall and the top wall of the path groove (304); a shock absorbing airbag (502) fixedly installed in the interior of the upper and lower placement grooves (501), the interior of the shock absorbing airbag (502) being connected to the interior of the placement groove (501), and the outer surfaces of the upper and lower shock absorbing airbags (502) being in contact with each other; an exhaust hole (503) provided at the top and bottom of the flip arm (303) and at one end away from the mounting plate (302), the interior of the exhaust hole (503) being connected to the interior of the placement groove (501); an electromagnetic pressure relief valve (504) fixedly installed on the side of the central connecting seat (100) via a sheet metal bracket; and an air pipe (505) fixedly installed between the exhaust hole (503) and the input end of the electromagnetic pressure relief valve (504) via a joint.

3. A wind turbine hoisting device according to claim 2, characterized in that: The shock absorbing part (500) further comprises: an air filling hole (506) which is provided at the top and the bottom of the flip arm (303) and is close to the bending position of the flip arm (303), the interior of the air filling hole (506) being connected to the interior of the path groove (304); and a valve (507) which is screwed onto the interior of the air filling hole (506).

4. A wind turbine hoisting device according to claim 3, characterized in that: The shock absorbing part (500) further comprises: a cord layer (508) fixedly mounted on the inner wall of the shock absorbing airbag (502) and composed of multiple layers of cord weaving distributed vertically and horizontally, the cord layer (508) being used for internal support of the shock absorbing airbag (502).

5. A wind turbine hoisting device according to claim 4, characterized in that: The shock-absorbing airbag (502) is made of flexible industrial rubber, and the thickness of the shock-absorbing airbag (502) is equal to the depth of the placement groove (501).

6. A method for hoisting a wind turbine hoisting device according to claim 5, characterized in that: The following steps are involved: S1, hooking the top of the flipping part (300) with a hook at the hoisting end of a large crane, clamping and gripping the wind turbine blade with three clamping parts (200), and lifting the wind turbine blade assembly upward; S2. After the wind turbine blade assembly is lifted to a suitable height, the output rod of the electric cylinder (407) contracts, and further, under the connecting action of the torsion bolt rod (405), the two trigger flaps (403) are driven to rotate 90 degrees along the junction between the positioning pin (402) and the No. 1 bearing seat (401) in the direction close to the electric cylinder (407). The rotation of the trigger flap (403) drives the push-pull groove (404) to rotate together. During the rotation of the push-pull groove (404), the inner wall of the push-pull groove (404) pushes the pulley (305) to slide along the path groove (304) in the direction close to the electric cylinder (407), so that the position of the pulley (305) deviates from the center of the lifting device, and the lifting device and the clamped wind turbine blade assembly are unbalanced, so that the pulley (305) continues to slide along the inner wall of the path groove (304) until the pulley (305) slides to the other end of the path groove (304), and the wind turbine blade assembly is flipped to an upright state; S3. While the pulley (305) slides along the inner wall of the path groove (304), it also squeezes the upper and lower shock-absorbing airbags (502), and squeezes the air inside the upper and lower shock-absorbing airbags (502) toward one end close to the exhaust hole (503). The air inside the upper and lower shock-absorbing airbags (502) is slowly squeezed out through the electromagnetic pressure relief valve (504), so that the pulley (305) slowly slides along the inner wall of the path groove (304), and the wind turbine blade assembly slowly flips 90 degrees.

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