A hanger device for replacing a blade of an offshore wind turbine

Abstract

This utility model discloses a lifting ring device for replacing offshore wind turbine blades, including movable and fixed end clamps, a telescopic frame, movable and fixed end electric hoists, an L-shaped lower beam, a counterweight, an adhesive hook device, and a bottom-mounted sling. The movable and fixed end electric hoists are each hung at opposite ends of the lifting beam; the upper hinge shaft of the telescopic frame is hung at one end of the lifting beam and is located at the same lifting point as the movable end electric hoist; the movable end clamp is installed on the lower hinge shaft of the telescopic frame and connected to the hook of the movable end electric hoist; the fixed end clamp is connected to the hook of the fixed end electric hoist; the upper end of the vertical section of the lower beam is connected to one end of the lifting beam; the counterweight is installed at the other end of the lifting beam; the adhesive hook device is installed on the top surface of the free end of the transverse section of the lower beam; the fixed end eye of the bottom-mounted sling is hooked onto the fixed end clamp, and the high-altitude hook eye of the bottom-mounted sling is temporarily hooked onto the adhesive hook device. This utility model shortens the high-altitude hooking time of the lifting ring device.

Description

Technical Field

[0001] This utility model relates to a lifting ring device for replacing offshore wind turbine blades. Background Technology

[0002] As the offshore wind power industry matures, early-stage wind turbines face a series of maintenance challenges, including turbine aging, component failures, and turbine shutdowns. Replacing wind turbine blades, a core component, is particularly crucial. The replacement process involves first securing the old blades in the air using a shipborne crane, blade clamps, and a bottom sling. Then, workers inside the nacelle remove the bolts connecting the old blades to the nacelle. Finally, the old blades are hoisted from the air onto a transport vessel using a crane. Currently, the bottom sling requires manual hooking and unhooking by workers at height, which has the following drawbacks:

[0003] 1. Personnel will be exposed to strong winds at an altitude of 100 meters, posing an extremely high safety risk;

[0004] 2. The accuracy of manual hooking is affected by the swaying of the ship, resulting in low efficiency;

[0005] 3. The window of opportunity for operation is short in severe sea conditions, and manual operation is uncontrollable.

[0006] Chinese utility model patent ZL202422071230.9 discloses an automatic high-altitude hook device for wind power slings. It consists of a beam, a winch mounted on the beam, a traction rope at the output end of the winch, two hook mechanisms connected to both ends of the beam, and a sling with rigid connecting rings fixed to both ends; the traction rope is connected to any one of the rigid connecting rings. In use, on the ground, the rigid connecting ring away from the traction rope is placed into the through slot of the connecting frame of another hook mechanism. The cylinder of the hook mechanism then extends the telescopic shaft into the rigid connecting ring, completing the hooking operation at one end of the sling. The beam is then raised to a high altitude, with the connecting frames of the two hook mechanisms located on both sides of the blade. At this time, the sling is located below the blade. The traction rope is lifted upward by a winch, which drives the rigid connecting ring at the other end of the sling to rise and gradually raise it into the through slot of the hook mechanism. Ground personnel operate and adjust the cable to maintain the stability of the rigid connecting ring. When the rigid connecting ring rises to the position directly opposite the telescopic shaft, the operation stops. The cylinder is then activated to extend the telescopic shaft into the rigid connecting ring, thus automatically completing the high-altitude hooking operation at the other end of the sling.

[0007] The patented "Automatic High-Altitude Hooking Device for Wind Power Slings" connects a rigid connecting ring at one end of the sling to a hooking mechanism on the ground, and a rigid connecting ring at the other end of the sling to the end of the traction rope, forming a closed loop with the sling, traction rope, and beam. When the beam rises above the blade and is located at the blade tip, the closed loop is fitted onto the blade from the blade tip. The beam is then moved towards the blade root to the position where it is to be hooked. A winch then lifts the traction rope, causing the rigid connecting ring at the other end of the sling to rise until it connects to another hooking mechanism. The "Automatic High-Altitude Hooking Device for Wind Power Slings" also requires ground personnel to operate and adjust the cable connected to the movable rigid connecting ring to maintain its stability and to align the movable rigid connecting ring with the telescopic shaft of the hooking mechanism.

[0008] In summary, the "automatic high-altitude hook device for wind power slings" in this patent still has the following shortcomings:

[0009] 1. The entire hook device forms a closed loop on the ground, and can only be put on the blade from the tip of the blade, which makes construction inconvenient;

[0010] 2. It requires assistance from ground personnel to hook the hook, resulting in a low level of automation. Utility Model Content

[0011] The purpose of this utility model is to overcome the defects of the prior art and provide a lifting ring device for replacing offshore wind turbine blades. It can greatly improve the success rate of high-altitude clamping hooks for wind turbine blades and shorten the operation time of high-altitude clamping hooks for wind turbine blades.

[0012] The purpose of this utility model is achieved as follows: a lifting ring device for replacing offshore wind turbine blades, comprising a lifting beam, a bottom sling, a movable end clamp, a fixed end clamp, a movable end electric hoist, a fixed end electric hoist, a telescopic frame, a lower beam, a counterweight, and an adhesive hook device; wherein,

[0013] The movable-end electric hoist and the fixed-end electric hoist are hung at both ends of the lifting beam in a one-to-one correspondence;

[0014] The telescopic frame is a diamond-shaped telescopic frame formed by four connecting rods. The upper hinge shaft of the telescopic frame is hung at one end of the lifting beam and is located at the same lifting point as the movable end electric hoist.

[0015] The movable end clamp includes a lifting plate, two clamping plates fixed to the bottom of the inner and outer sides of the lifting plate, an electromagnetic pin mounted on the outer side of a clamping plate fixed to the bottom of the outer side of the lifting plate, and a vision probe mounted on the inner side of a clamping plate fixed to the bottom of the outer side of the lifting plate; each of the two clamping plates has a pin hole coaxially formed in its lower middle part; the movable end clamp is mounted on the middle of the lower hinge shaft of the telescopic frame through the lifting plate and connected to the hook of the movable end electric hoist;

[0016] The structure of the fixed-end clamp is the same as that of the movable-end clamp; the fixed-end clamp is connected to the hook of the fixed-end electric hoist via a lifting plate;

[0017] The lower beam is L-shaped. The upper end of the vertical part of the lower beam is connected to one end of the lifting beam near the fixed end electric hoist by a horizontal extension beam, so that the horizontal part of the lower beam is parallel to the lower end of the lifting beam.

[0018] The counterweight is installed at the other end of the lifting beam near the movable end of the electric hoist;

[0019] The adhesive hook device is installed on the top surface of the free end of the transverse part of the lower beam, corresponding to the movable end clamp.

[0020] The bottom sling is provided with a fixed end eye and a high-altitude hook eye at each end; the fixed end eye is hooked on the fixed end clamp, and the high-altitude hook eye is temporarily hung on the adhesive hook device.

[0021] When the telescopic frame is fully retracted, the lifting ring device is C-shaped, forming a lateral insertion port for the fan blades between the bottom of the movable end clamp and the top of the adhesive hook device. When the fan blades enter the space between the lateral insertion port and the transverse part of the lifting beam and the lower beam, the telescopic frame is extended downward by the movable end electric hoist. When the electromagnetic pin on the movable end clamp is aligned with the high-altitude hook eye, the electromagnetic pin is activated to sequentially insert into the pin hole on one clamping plate, the high-altitude hook eye, and the pin hole on another clamping plate. Then, the lower end of the telescopic frame is retracted upward by the movable end electric hoist, causing the high-altitude hook eye to disengage from the adhesive hook device. The telescopic frame continues to retract until it is fully retracted, so that the bottom sling tightly holds the fan blades.

[0022] In the aforementioned lifting ring device for replacing offshore wind turbine blades, the lower parts of the two clamping plates of the movable end clamp are each bent outwards into a figure-eight shape.

[0023] In the aforementioned lifting ring device for replacing offshore wind turbine blades, the lower beam is a truss structure, and a triangular reinforcing frame is provided between the lower inner side of the vertical part and the inner top surface of the horizontal part.

[0024] The aforementioned lifting ring device for replacing offshore wind turbine blades includes a hook device comprising a base plate, a vertical plate fixed to the base plate with a U-shaped groove in the center of its top surface, a bracket fixed to the top of the inner side of the vertical plate, and a positioning plate fixed to the base plate, located on the outer side of the vertical plate, and with a V-shaped groove in the center of its top surface; the high-altitude hook eye is hung on a pair of brackets.

[0025] The aforementioned lifting ring device for replacing offshore wind turbine blades, wherein the hook device has a right-angled triangle bracket with Velcro fasteners installed on the top surface.

[0026] The features of this utility model of the lifting ring device for replacing offshore wind turbine blades are: based on machine vision control and the adjustable position of the hook device, the success rate of grabbing the high-altitude hook eye of the bottom sling is basically 100%, and the high-altitude hook eye of the bottom sling does not rely on manual assistance during the high-altitude hooking process, with a high degree of automation; the high-altitude hooking operation time of a single high-altitude hook eye is shortened from 60 minutes to 30 minutes, and it can operate stably under the condition of wind speed less than 8m / s. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the lifting ring device for replacing offshore wind turbine blades according to this utility model;

[0028] Figure 2 This is a schematic diagram of the lifting ring device of this utility model when lifting and inserting fan blades;

[0029] Figure 3 This is a schematic diagram of the lifting ring device of this utility model after the fan blades are inserted;

[0030] Figure 4 This is a schematic diagram of the lifting ring device of this utility model when it is automatically hooking.

[0031] Figure 5 This is a schematic diagram of the lifting ring device of this utility model when tightening the bottom sling. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings.

[0033] Please see Figures 1 to 5 The lifting ring device for replacing offshore wind turbine blades of this utility model includes a lifting beam 1, a movable end electric hoist 2A, a fixed end electric hoist 2B, a telescopic frame 3, a movable end clamp 4A, a fixed end clamp 4B, a lower beam 5, a counterweight block 6, an adhesive hook device 7, and a bottom sling 8.

[0034] The top surface of the lifting beam 1 is equipped with a hanging column that connects to the lifting equipment.

[0035] The movable-end electric hoist 2A and the fixed-end electric hoist 2B are hung at both ends of the lifting beam 1 in a one-to-one correspondence.

[0036] The telescopic frame 3 is a diamond-shaped telescopic frame formed by four connecting rods. The upper hinge shaft of the telescopic frame 3 is hung on one end of the lifting beam 1 and is located at the same lifting point as the movable end electric hoist 2A.

[0037] The movable end gripper 4A includes a lifting plate 41, two gripping plates 42, an electromagnetic pin 40, and a vision probe. The lifting plate 41 has a through hole at its upper and lower parts. The two gripping plates 42 are fixed to the bottom of the inner and outer sides of the lifting plate 41 and are perpendicular to the lifting plate 41. A pin hole coaxial with the electromagnetic pin 40 is opened in the lower middle part of each of the two gripping plates 42. The lower parts of each gripping plate 42 are bent outwards in a V-shape. The electromagnetic pin 40 is installed on the outer side of a clamping plate 42 fixed to the bottom of the outer side of the lifting plate 41; the vision probe (not shown) is fixed on the inner side of the clamping plate 42 fixed to the bottom of the outer side of the lifting plate 41; the movable end clamp 4A is fitted onto the lower hinge shaft of the telescopic frame 3 through the lower through hole of the lifting plate 41, and the movable end clamp 4A is connected to the hook of the movable end electric hoist 2A through the upper through hole of the lifting plate 41.

[0038] The structure of the fixed end clamp 4B is the same as that of the movable end clamp 4A; the fixed end clamp 4B is connected to the hook of the fixed end electric hoist 2A through the upper through hole of the hoisting plate 41.

[0039] The lower beam 5 is L-shaped. The upper end of the vertical part of the lower beam 5 is connected to one end of the lifting beam 1 near the fixed end electric hoist 2b by a transverse extension beam 50, so that the transverse part of the lower beam 5 is parallel to the lower end of the lifting beam 1. The lower beam 5 is a truss structure, and a triangular reinforcing frame is provided between the lower inner side of the vertical part and the inner top surface of the transverse part.

[0040] The counterweight 6 is installed at the other end of the lifting beam 1 near the moving end electric hoist 2A by four sets of high-strength bolts.

[0041] The adhesive hook device 7 is installed on the top surface of the free end of the transverse part of the lower beam 5, corresponding to the movable end clamp 4A. The adhesive hook device 7 includes a base plate, a vertical plate 71 fixed on the base plate and having a U-shaped groove in the middle of its top surface, a bracket 72 fixed on the upper part of the inner side of the vertical plate 71, and a positioning plate 70 fixed on the base plate and located on the outside of the vertical plate 71. A V-shaped groove is opened in the middle of the top surface of the positioning plate 70. The bracket 72 is a right triangle and has Velcro fasteners fixed on its top surface. Several sets of mounting holes are opened transversely at intervals on the top surface of the free end of the transverse part of the lower beam 5, so that the position of the adhesive hook device 7 on the transverse part of the lower beam 5 can be adjusted according to the width of the fan blade 9.

[0042] The bottom sling 8 has a fixed end eye 81 and a high-altitude hook eye 82 at each end. The fixed end eye 81 is hooked on the fixed end clamp 4B, and the high-altitude hook eye 82 is hung on the bracket 72 of the hook-attachment device 7, so that the center of the high-altitude hook eye 82 is aligned with the U-shaped groove on the upright plate 71, and is temporarily fixed to the bracket 72 of the hook-attachment device 7 by Velcro, so as to prevent the high-altitude hook eye 82 from shifting or falling off the bracket 72 when the lifting ring device rises, which would affect the hook of the subsequent movable end clamp 4A.

[0043] The working process of the lifting ring device for replacing offshore wind turbine blades of this utility model is as follows:

[0044] 1. After raising the lifting beam 1 above the lower beam 5 from the ground, use a lifting vehicle or scaffolding to assemble the lower beam 5 with the lifting beam 1 using eight sets of high-strength bolts and quick-release pins. Adjust the distance between the movable end electric hoist 2A and the fixed end electric hoist 2B on the lifting beam 1 according to the width of the fan blade 9 to be replaced. Then, fix the fixed end eye 81 of the bottom sling 8 to the fixed end clamp 4B, and hang the high-altitude hook eye 82 on the adhesive hook device 7. Adjust the bottom sling 8 so that it lies flat on the top surface of the transverse part of the lower beam 5. At this time, the telescopic frame 3 is fully retracted, and the lifting ring device is C-shaped, that is, the bottom of the movable end clamp 4A and the top of the adhesive hook device 7 form a lateral insertion port for the fan blade 9 (see Figure 1 );

[0045] 2. Before lifting, first lower the telescopic frame 3 using the movable end electric hoist 2A, that is, lower the movable end clamp 4A. By adjusting the position of the hook device 7, ensure that the lower part of the pair of clamping plates 42 of the movable end clamp 4A can be locked on the positioning plate 70 and the upright plate 71 of the hook device 7, and make the electromagnetic pin 40 embedded in the V-shaped groove of the positioning plate 70, ensuring that the movable end clamp 4A can hook with the high-altitude hook eye 82; then conduct a trial lift. The weight of the counterweight 6 can be adjusted to ensure that the entire lifting ring device is in a horizontal state.

[0046] 3. After the trial lift is completed, reattach the high-altitude hook eye 82 to the adhesive hook device 7, retract the telescopic frame 3 using the movable end electric hoist 2A, lift the lifting ring device to the same height as the fan blade 9, and move it laterally in the direction of the fan blade 9 (see...). Figure 2 ), until the fan blade 9 enters the middle of the space between the lifting beam 1 and the lower beam 5 from the side insertion port of the lifting ring device, at which point the lifting ring device stops moving and remains balanced (see Figure 3 );

[0047] 4. Using the electric hoist 2A, extend the telescopic frame 3 downwards until the pair of clamping plates 42 of the movable end gripper 4A can be engaged with the positioning plate 70 and the upright plate 71 of the hook-attaching device 7, and make the electromagnetic pin 40 embedded in the V-groove of the positioning plate 70. After confirming that the electromagnetic pin 40 is aligned with the high-altitude hook ring eye 82 on the hook-attaching device 7 by using a visual probe, activate the electromagnetic pin 40 so that it is sequentially inserted into the pin hole on one clamping plate 42, the high-altitude hook ring eye 82, and the pin hole on the other clamping plate 42, thereby realizing the automatic hooking of the movable end gripper 4A with the high-altitude hook ring eye 82 (see...). Figure 4 Then, using the electric hoist 2A at the movable end, the lower end of the telescopic frame 3 is retracted upwards, causing the high-altitude hook eye 82 to disengage from the Velcro on the hook device 7. The telescopic frame 3 continues to retract until it is fully retracted. The bottom sling 8 is tightened, and then the pressure plate 10 on the lifting beam 1 is activated to press against the top surface of the fan blade 9, completing the clamping of the fan blade 9 (see...). Figure 5 This allows you to disassemble the fan blades 9.

[0048] The above embodiments are for illustrative purposes only and are not intended to limit the present invention. Those skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the scope of the present invention and should be defined by the claims.

Claims

1. A hanger device for replacing a wind turbine blade at sea, comprising a spreader beam, a pocketed sling, a movable end gripper and a fixed end gripper; characterized in that, The lifting ring device also includes a movable end electric hoist, a fixed end electric hoist, a telescopic frame, a lower beam, a counterweight, and an adhesive hook device; The movable-end electric hoist and the fixed-end electric hoist are hung at both ends of the lifting beam in a one-to-one correspondence; The telescopic frame is a diamond-shaped telescopic frame formed by four connecting rods. The upper hinge shaft of the telescopic frame is hung at one end of the lifting beam and is located at the same lifting point as the movable end electric hoist. The movable end clamp includes a lifting plate, two clamping plates fixed to the bottom of the inner and outer sides of the lifting plate, an electromagnetic pin mounted on the outer side of a clamping plate fixed to the bottom of the outer side of the lifting plate, and a vision probe mounted on the inner side of a clamping plate fixed to the bottom of the outer side of the lifting plate; each of the two clamping plates has a pin hole coaxially formed in its lower middle part; the movable end clamp is mounted on the middle of the lower hinge shaft of the telescopic frame through the lifting plate and connected to the hook of the movable end electric hoist; The structure of the fixed-end clamp is the same as that of the movable-end clamp; the fixed-end clamp is connected to the hook of the fixed-end electric hoist via a lifting plate; The lower beam is L-shaped. The upper end of the vertical part of the lower beam is connected to one end of the lifting beam near the fixed end electric hoist by a horizontal extension beam, so that the horizontal part of the lower beam is parallel to the lower end of the lifting beam. The counterweight is installed at the other end of the lifting beam near the movable end of the electric hoist; The adhesive hook device is installed on the top surface of the free end of the transverse part of the lower beam, corresponding to the movable end clamp. The bottom sling is provided with a fixed end eye and a high-altitude hook eye at each end; the fixed end eye is hooked on the fixed end clamp, and the high-altitude hook eye is temporarily hung on the adhesive hook device. When the telescopic frame is fully retracted, the lifting ring device is C-shaped, forming a lateral insertion port for the fan blades between the bottom of the movable end clamp and the top of the adhesive hook device. When the fan blades enter the space between the lateral insertion port and the transverse part of the lifting beam and the lower beam, the telescopic frame is extended downward by the movable end electric hoist. When the electromagnetic pin on the movable end clamp is aligned with the high-altitude hook eye, the electromagnetic pin is activated to sequentially insert into the pin hole on one clamping plate, the high-altitude hook eye, and the pin hole on another clamping plate. Then, the lower end of the telescopic frame is retracted upward by the movable end electric hoist, causing the high-altitude hook eye to disengage from the adhesive hook device. The telescopic frame continues to retract until it is fully retracted, so that the bottom sling tightly holds the fan blades.

2. A hoisting ring device for replacing a blade of an offshore wind turbine according to claim 1, characterized in that The lower parts of the two clamping plates of the movable end clamp are each bent outwards to form a figure-eight shape.

3. A hoisting ring device for replacing a blade of an offshore wind turbine according to claim 1, characterized in that The lower beam is a truss structure, and a triangular reinforcing frame is provided between the lower inner side of the vertical part and the inner top surface of the horizontal part.

4. The lifting ring device for replacing offshore wind turbine blades according to claim 1, characterized in that, The adhesive hook device includes a base plate, a vertical plate fixed to the base plate with a U-shaped groove in the center of its top surface, a bracket fixed to the top of the inner side of the vertical plate, and a positioning plate fixed to the base plate, located on the outer side of the vertical plate, with a V-shaped groove in the center of its top surface; the high-altitude hook eye is hung on a pair of brackets.

5. The lifting ring device for replacing offshore wind turbine blades according to claim 4, characterized in that, The hook device has a right-angled triangle frame with Velcro attached to the top surface.

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