Single-hook hub turnover lifting appliance

Abstract

The utility model relates to a single-hook hub turnover lifting appliance which comprises a first connecting seat, a second connecting seat and an arc-shaped connecting seat, one end of the arc-shaped connecting seat is hinged to the first connecting seat, and the other end of the arc-shaped connecting seat is hinged to the second connecting seat. An included angle exists between the connecting line of the first connecting base and the gravity center of the wind power hub and the connecting line of the second connecting base and the gravity center of the wind power hub, a swing arm is rotationally connected to the arc-shaped connecting base, a lifting hole is formed in the end, away from the arc-shaped connecting base, of the swing arm, and a driving structure used for driving the swing arm to rotate is arranged on the arc-shaped connecting base. According to the wind power hub turnover device, the swing arm is driven to rotate through the driving structure, turnover of the wind power hub can be achieved under the gravity effect after the arc-shaped connecting base, the swing arm and the wind power hub are combined, only one external lifting appliance is needed in the whole turnover process, use is easy, and meanwhile the construction cost is saved.

Description

Technical Field

[0001] This application relates to the field of wind turbine hub installation technology, and in particular to a single-hook hub turning and lifting device. Background Technology

[0002] The wind turbine hub is an important mechanical component, mainly used to support the blades of the wind turbine and withstand loads from the wind and the rotation of the rotor in all directions. In the current installation process of wind turbine hubs, the wind turbine hub is transported to the designated location by transportation equipment, and then lifted to the installation position by lifting tools such as truck cranes. After that, the wind turbine hub is turned over by manual control with the lifting tools until the installation plate of the wind turbine hub aligns with the installation interface of the base. Then, the wind turbine hub can be manually connected to the base. Finally, the lifting tools are removed to complete the installation of the wind turbine hub.

[0003] In the aforementioned wind turbine hub lifting and turning operation, due to the weight of the wind turbine hub itself, the industry typically requires at least two lifting devices to work together. That is, a main lifting device is connected to the outer wall of the wind turbine hub, and an auxiliary lifting device is connected to another connection point on the outer wall of the wind turbine hub. Then, the main lifting device lifts the wind turbine hub to a high altitude, and after it is aligned with the mounting interface of the turbine base, the auxiliary lifting device works with the main lifting device to turn the wind turbine hub over, thereby connecting the mounting plate of the wind turbine hub with the mounting interface of the turbine base.

[0004] However, while using the two lifting devices together can achieve relatively stable lifting and turning of wind turbine hubs, it requires the cooperation of two cranes, which is more troublesome and has higher construction costs. In addition, the connection and disassembly process between the lifting devices and the hub is also more complicated, and there are areas for improvement in the overall use. Utility Model Content

[0005] To address the issues of cumbersome operation and high construction costs associated with existing wheel hub lifting and turning operations using two lifting devices, this application provides a single-hook wheel hub turning lifting device.

[0006] This application provides a single-hook wheel hub turning and lifting device, which adopts the following technical solution:

[0007] A single-hook hub turning lifting device includes a first connecting seat and a second connecting seat for connecting a wind turbine hub, and an arc-shaped connecting seat disposed between the first connecting seat and the second connecting seat. One end of the arc-shaped connecting seat is connected to the first connecting seat, and the other end of the arc-shaped connecting seat is connected to the second connecting seat. There is an angle between the line connecting the first connecting seat and the center of gravity of the wind turbine hub and the line connecting the second connecting seat and the center of gravity of the wind turbine hub. A swing arm is rotatably connected to the arc-shaped connecting seat. A lifting hole for connecting the lifting device is provided at the end of the swing arm away from the arc-shaped connecting seat. A drive structure for driving the swing arm to rotate is provided on the arc-shaped connecting seat.

[0008] By adopting the above technical solution, during use, the arc-shaped connecting seat, the first connecting seat, and the second connecting seat are installed together with the wind turbine hub to be turned over. After connecting the external lifting tool to the lifting hole, the arc-shaped connecting seat and the wind turbine hub are first lifted off the ground by the external lifting tool, thus leaving space for the wind turbine hub to rotate and turn over. Then, the swing arm is driven to rotate by the drive structure. During the rotation of the swing arm, under the action of the wind turbine hub's own weight, the wind turbine hub and the arc-shaped connecting seat rotate synchronously, so that the lifting hole, the lifting point of the external lifting tool, and the center of gravity of the wind turbine hub and the arc-shaped connecting seat are always in the same straight line. In this way, the wind turbine hub can be turned over by single hook control. Then, the turned wind turbine hub is lifted to the corresponding position on the base by the external lifting tool, and the wind turbine hub can be installed on the base by bolts. Finally, the first connecting seat and the second connecting seat are removed from the wind turbine hub. The whole process is simpler, more convenient, safer, and saves construction costs compared to the existing technology that requires two cranes to cooperate for high-altitude turning operations.

[0009] Preferably, the angle between the line connecting the first connecting seat and the center of gravity of the wind turbine hub and the line connecting the second connecting seat and the center of gravity of the wind turbine hub is between 60 and 90 degrees.

[0010] By adopting the above technical solution, during use, the angle between the line connecting the first connecting seat and the center of gravity of the wind turbine hub and the line connecting the second connecting seat and the center of gravity of the wind turbine hub ensures the stable implementation of the subsequent turning process, thereby ensuring the turning effect of the wind turbine hub and making it more conducive to use.

[0011] Preferably, the drive structure includes a hydraulic cylinder mounted on an arc-shaped connecting seat. The cylinder body end of the hydraulic cylinder is hinged to one end of the arc-shaped connecting seat near the first connecting seat. The piston rod end of the hydraulic cylinder is hinged to the end of the swing arm away from the lifting hole. The hinge point between the piston rod end of the hydraulic cylinder and the swing arm, the lifting hole, and the rotation point between the swing arm and the arc-shaped connecting seat are arranged in a triangle.

[0012] By adopting the above technical solution, the purpose of driving the swing arm to rotate can be achieved by setting up the hydraulic cylinder and coordinating the connection position between the hydraulic cylinder and the arc-shaped connecting seat and the swing arm.

[0013] Preferably, the first connecting seat and the arc-shaped connecting seat are rotatably connected by a first pivot pin, and the second connecting seat and the arc-shaped connecting seat are rotatably connected by a second pivot pin.

[0014] By adopting the above technical solution, during use, the first connecting seat and the arc-shaped connecting seat are rotatably connected, and the second connecting seat and the arc-shaped connecting seat are rotatably connected, which ensures the connection stability of the first connecting seat, the second connecting seat and the wind turbine hub, and improves the convenience of connecting the whole device with the wind turbine hub.

[0015] Preferably, the first connecting seat includes a base plate bolted to the wind turbine hub and two ear plates fixed on the base plate. The two ear plates are arranged in parallel and perpendicular to the base plate. The arc-shaped connecting seat is located between the two ear plates and is rotatably connected to the ear plates.

[0016] By adopting the above technical solution, during use, the stable connection between the arc-shaped connecting seat and the wind turbine hub is ensured through the cooperation of the base plate and the two ear plates without affecting the rotational connection between the ear plates and the arc-shaped connecting seat.

[0017] Preferably, a triangular plate is also provided between the ear plate and the base plate, and the two right-angled sides of the triangular plate are fixedly connected to the ear plate and the base plate respectively.

[0018] By adopting the above technical solution, the structural strength between the base plate and the ear plate is increased when the triangular plate is set.

[0019] Preferably, the swing arm includes two parallel side plates and a horizontal plate disposed between the two side plates. The two ends of the horizontal plate are fixedly connected to the corresponding side plates. A plurality of horizontal plates are provided, and a plurality of weight-reducing cavities are formed between the plurality of horizontal plates and the two side plates.

[0020] By adopting the above technical solution, the weight of the swing arm is reduced while ensuring the overall structural strength of the swing arm through the setting of side plates and cross plates, thus facilitating the use and installation of the swing arm.

[0021] Preferably, the arc-shaped connecting seat is further provided with a limiting structure for limiting the rotation angle of the swing arm.

[0022] By adopting the above technical solution, the rotation angle of the swing arm is limited by the limiting structure during use, so as to avoid the swing arm rotation angle being too large, which would affect the subsequent lifting and the turning effect of the wind turbine hub.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The curved connecting seat and the wind turbine hub are lifted off the ground by external lifting equipment, leaving space for the wind turbine hub to rotate and turn. Then, the swing arm is driven to rotate by the drive structure. During the rotation of the swing arm, the wind turbine hub and the curved connecting seat rotate synchronously under the action of the wind turbine hub's own weight. This ensures that the lifting hole, the lifting point of the external lifting equipment, and the center of gravity of the wind turbine hub and the curved connecting seat are always in the same straight line. In this way, the wind turbine hub can be turned over by single hook control. Then, the turned wind turbine hub is lifted to the corresponding position on the base by external lifting equipment. The wind turbine hub can then be installed on the base by bolts. Finally, the first and second connecting seats are removed from the wind turbine hub. The whole process is simpler, more convenient, safer and more cost-effective than the existing technology that requires two cranes to work together for high-altitude turning.

[0025] 2. By using the angle between the line connecting the first connecting seat and the center of gravity of the wind turbine hub and the line connecting the second connecting seat and the center of gravity of the wind turbine hub, and in conjunction with the hydraulic cylinder, as well as the connection position between the hydraulic cylinder and the arc-shaped connecting seat and the swing arm, the effect and quality of the subsequent wind turbine hub flipping are ensured.

[0026] 3. The connection method between the first connecting seat, the second connecting seat and the arc-shaped connecting seat, combined with the structural design of the swing arm, makes the overall use of the turning hoist more convenient. Attached Figure Description

[0027] Figure 1 This is a schematic diagram illustrating the main usage state of the turning and lifting device in Embodiment 1 of this application;

[0028] Figure 2 This is an isometric schematic diagram of the overall structure of the turning and lifting device, which is the main feature of Embodiment 1 of this application;

[0029] Figure 3 This is a cross-sectional view of the main structure of the turning and lifting device in Embodiment 1 of this application;

[0030] Figure 4 This is a schematic diagram illustrating the state of the wind turbine hub before it is lifted, as shown in Embodiment 1 of this application.

[0031] Figure 5 This is a schematic diagram illustrating the state during the wind turbine hub flipping process, which is the main feature of Embodiment 1 of this application;

[0032] Figure 6 This is a schematic diagram illustrating the state of the wind turbine hub after it has overturned, as shown in Embodiment 1 of this application.

[0033] Figure 7 This is a schematic diagram illustrating the main structure of the turning and lifting device in Embodiment 2 of this application;

[0034] Figure 8This is an exploded view of the main structure of the turning and lifting device in Embodiment 2 of this application;

[0035] Figure 9 This is a schematic diagram illustrating the arc-shaped connecting seat structure in Embodiment 2 of this application.

[0036] Reference numerals: 1. First connecting seat; 11. Base plate; 12. Ear plate; 13. Triangular plate; 2. Second connecting seat; 3. Arc-shaped connecting seat; 31. Third seat body; 32. Fourth seat body; 33. Positioning hole; 34. Limiting hole; 35. Positioning bolt; 4. Swing arm; 41. Lifting hole; 42. Side plate; 43. Horizontal plate; 44. Weight reduction cavity; 5. Hydraulic cylinder; 6. First pivot pin; 7. Second pivot pin; 8. Diagonal brace plate; 9. Side enclosure plate; 10. Extension seat; 101. First seat body; 102. Second seat body; 103. Storage groove; 104. Snap-fit ​​protrusion ring; 20. Wind turbine hub. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1 -Appendix Figure 9 This application will be described in further detail.

[0038] This application discloses a single-hook wheel hub turning lifting device.

[0039] Example 1:

[0040] Reference Figure 1 and Figure 2 A single-hook hub turning hoist includes a first connecting seat 1, a second connecting seat 2, and an arc-shaped connecting seat 3. Before hoisting, the wind turbine hub 20 is placed horizontally on the ground or on a transport device. The first connecting seat 1 is fixedly connected to one connection point on the wind turbine hub 20, and the second connecting seat 2 is fixedly connected to another connection point on the wind turbine hub 20. The arc-shaped connecting seat 3 is located between the first connecting seat 1 and the second connecting seat 2, and one end of the arc-shaped connecting seat 3 is detachably connected to the first connecting seat 1, and the other end of the arc-shaped connecting seat 3 is detachably connected to the second connecting seat 2.

[0041] Reference Figure 1 and Figure 2The first connecting seat 1 includes a base plate 11 and an ear plate 12. The base plate 11 is fixed to a connection point on the outer wall of the wind turbine hub 20 by bolts. There are two ear plates 12, which are arranged in parallel. The ear plates 12 are welded and fixed to the base plate 11 and are perpendicular to the base plate 11. In order to ensure the strength of the connection structure between the ear plate 12 and the base plate 11, a triangular plate 13 is also provided between the ear plate 12 and the base plate 11. One right-angle side of the triangular plate 13 is welded and fixed to the ear plate 12, and the other right-angle side of the triangular plate 13 is welded and fixed to the base plate 11. There are several triangular plates 13, which are spaced apart on the base plate 11. In this embodiment, one ear plate 12 is provided with two triangular plates 13. The arc-shaped connecting seat 3 is rotatably arranged between the two ear plates 12.

[0042] Reference Figure 1 and Figure 2 In this application, a first pivot pin 6 is fixed to the ear plate 12 by a nut, and the end of the arc-shaped connecting seat 3 is rotatably connected to the first pivot pin 6. A second pivot pin 7 is installed on the second connecting seat 2, and the other end of the arc-shaped connecting seat 3 is rotatably connected to the second pivot pin 7. In use, through the cooperation of the first pivot pin 6 and the second pivot pin 7, the first connecting seat 1 and the second connecting seat 2 are both hinged to the arc-shaped connecting seat 3, which facilitates the connection between the arc-shaped connecting seat 3 and the wind turbine hub 20, making it more convenient to use.

[0043] Reference Figure 1 and Figure 2 Meanwhile, during the assembly of the first connecting seat 1, the second connecting seat 2 and the wind turbine hub 20, in order to facilitate the subsequent turning of the wind turbine hub 20, it is necessary to ensure that there is an angle between the line connecting the center of gravity of the first connecting seat 1 and the center of gravity of the wind turbine hub 20 and the line connecting the second connecting seat 2 and the center of gravity of the wind turbine hub 20, so as to ensure the normal turning effect of the wind turbine hub 20. In this embodiment, the setting range of this angle should be between 60 degrees and 90 degrees.

[0044] Reference Figure 2 and Figure 3 A swing arm 4 is also provided on the arc-shaped connecting seat 3. One end of the swing arm 4 is hinged to the arc-shaped connecting seat 3, and the other end of the swing arm 4 is provided with a lifting hole 41. In this application, the swing arm 4 is composed of two side plates 42 and several horizontal plates 43. The two side plates 42 are arranged parallel to each other, and the horizontal plates 43 are located between the two side plates 42. The two ends of the horizontal plates 43 are welded and fixed to the corresponding side plates 42. The several horizontal plates 43 form a weight-reducing cavity 44. The lifting hole 41 is opened on the side plates 42. In use, the arrangement of several horizontal plates 43 and side plates 42 ensures the structural strength of the swing arm 4 on the one hand, and reduces the weight of the swing arm 4 on the other hand, making it more convenient to use and saving processing costs.

[0045] Reference Figure 2 and Figure 3 A driving structure is provided on the arc-shaped connecting seat 3. The driving structure is used to drive the swing arm 4 to rotate. The driving structure includes a hydraulic cylinder 5. The hydraulic cylinder 5 is integrally set on the arc-shaped connecting seat 3, and the end of the cylinder body of the hydraulic cylinder 5 is hinged to the end of the arc-shaped connecting seat 3 near the first connecting seat 1. The end of the piston rod of the hydraulic cylinder 5 is hinged to the end of the swing arm 4 away from the lifting hole 41. At the same time, it is necessary to ensure that, in this application, the position of the hinge point between the end of the piston rod of the hydraulic cylinder 5 and the swing arm 4, the lifting hole 41 on the swing arm 4, and the rotation point of the swing arm 4 and the arc-shaped connecting seat 3 are triangularly distributed. By setting the position of the hydraulic cylinder 5 and coordinating the connection position between the hydraulic cylinder 5 and the swing arm 4, the rotation of the piston rod of the hydraulic cylinder 5 can achieve the purpose of driving the swing arm 4 to rotate.

[0046] Reference Figure 1 and Figure 3 In use, the wind turbine hub 20 is placed on the ground. After the arc-shaped connecting seat 3, the first connecting seat 1, and the second connecting seat 2 are assembled on the corresponding positions on the wind turbine hub 20, the external lifting device is connected to the lifting hole 41 on the swing arm 4. The wind turbine hub 20 with the arc-shaped connecting seat 3 can then be lifted by the external lifting device. After the wind turbine hub 20 is lifted off the ground, it rotates synchronously under the action of its own gravity until the center of gravity of the wind turbine hub 20 and the arc-shaped connecting seat 3 are aligned with the lifting point and lifting hole 41 of the external lifting device on the same vertical line. The wind turbine hub 20 remains in a stable state. As the wind turbine hub 20 continues to be lifted until there is enough space for it to turn over, the piston rod of the hydraulic cylinder 5 can be extended to drive the swing arm 4 to rotate. This causes the center of gravity of the wind turbine hub 20 and the arc-shaped connecting seat 3 to shift, thereby achieving the turning and rotation of the wind turbine hub 20 under the action of gravity.

[0047] Reference Figure 1 and Figure 3 During the overturning process of the wind turbine hub 20, in order to prevent the swing arm 4 from rotating too much when the piston rod of the hydraulic cylinder 5 extends, a limiting structure is also provided on the arc-shaped connecting seat 3. The limiting structure is used to limit the rotation angle of the swing arm 4. The limiting structure includes a diagonal brace 8 set on the arc-shaped connecting seat 3. The diagonal brace 8 is welded and fixed on the arc-shaped connecting seat 3. The diagonal brace 8 is used to abut and support the swing arm 4. In this embodiment, when the swing arm 4 rotates to abut against the diagonal brace 8, the wind turbine hub 20 rotates and overturns to a specified angle, that is, aligned with the angle of the mounting interface on the base.

[0048] Reference Figure 1 and Figure 3A side plate 9 is also provided at one end of the arc-shaped connecting seat 3 near the first connecting seat 1. The side plate 9 is welded and fixed to the arc-shaped connecting seat 3, and the side plate 9 surrounds the outside of the first pivot pin 6. In actual use, the side plate 9 can limit the rotation range of the hydraulic cylinder 5 without affecting the rotation of the piston rod of the hydraulic cylinder 5 during the extension and retraction process, so as to cooperate with the inclined support plate 8 to limit the rotation angle of the swing arm 4.

[0049] Reference Figure 4 , Figure 5 and Figure 6 A method for using a single-hook wheel hub turning lifting device includes the following steps:

[0050] S1. Select the corresponding arc-shaped connecting seat 3 according to the size and specifications of the wind turbine hub 20 to be hoisted. That is, ensure that after the arc-shaped connecting seat 3, the first connecting seat 1 and the second connecting seat 2 are installed together with the wind turbine hub 20, the angle between the line connecting the first connecting seat 1 and the center of gravity of the wind turbine hub 20 and the line connecting the second connecting seat 2 and the center of gravity of the wind turbine hub 20 is between 60 and 90 degrees.

[0051] S2. Fix the first connecting seat 1 and the second connecting seat 2 to the wind turbine hub 20 with bolts. Connect the external lifting device to the lifting hole 41 of the swing arm 4. Control the external lifting device to lift the swing arm 4, the arc-shaped connecting seat 3 and the wind turbine hub 20 to a certain height above the ground. In this embodiment, it needs to be lifted about one meter above the ground. During the process of the wind turbine hub 20 rising above the ground, the wind turbine hub 20 will rotate under the action of gravity until the center of gravity of the wind turbine hub 20 and the arc-shaped connecting seat 3 are on the same vertical line as the lifting point and the lifting hole 41 of the external lifting device. The wind turbine hub 20 will then remain in a stable state. After that, stop lifting the wind turbine hub 20.

[0052] S3. By controlling the piston rod of the hydraulic cylinder 5 to extend and drive the swing arm 4 to rotate, under the action of gravity, when the swing arm 4 rotates, the center of gravity of the wind turbine hub 20 and the arc-shaped connecting seat 3 shifts, thereby causing the wind turbine hub 20 to rotate and turn over. During the turning process of the wind turbine hub 20, the center of gravity of the wind turbine hub 20, the arc-shaped connecting seat 3, and the swing arm 4 as a whole is always on the same straight line as the lifting hole 41 on the swing arm 4 and the lifting point of the external lifting device. Until the piston rod of the hydraulic cylinder 5 drives the swing arm 4 to abut against the inclined support plate 8, the wind turbine hub 20 turns over to the designated state. At this time, the mounting plate angle of the wind turbine hub 20 is aligned with the mounting interface angle of the base, and the turning of the wind turbine hub 20 ends.

[0053] S4. Using external lifting equipment, continue to lift the overturned wind turbine hub 20 to the corresponding base, and align the mounting plate of the wind turbine hub 20 with the mounting interface of the base;

[0054] S5. The workers use tools to screw the bolts one by one into the mounting plate, thereby connecting the wind turbine hub 20 and the base bolts together, thus completing the assembly of the wind turbine hub 20.

[0055] S6. Remove the first connecting seat 1 and the second connecting seat 2 from the wind turbine hub 20, so that the arc-shaped connecting seat 3 is detached from the wind turbine hub 20. Then, use an external hoist to move the arc-shaped connecting seat 3, the swing arm 4, the first connecting seat 1 and the second connecting seat 2 as a whole to the ground, so as to facilitate connection with the subsequent wind turbine hub 20 and thus facilitate secondary use.

[0056] The implementation principle of this application embodiment is as follows: In use, the wind turbine hub 20 is transported to the designated location by a transport device. Then, an arc-shaped connecting seat 3 of the corresponding specification is selected, and the first connecting seat 1 and the second connecting seat 2 on the arc-shaped connecting seat 3 are fixed to the connection point of the wind turbine hub 20 by bolts. The external lifting device is connected to the lifting hole 41 on the swing arm 4. Then, the external lifting device is started to lift the wind turbine hub 20 with the arc-shaped connecting seat 3. During the process of the wind turbine hub 20 leaving the ground and rising, the wind turbine hub 20 rotates due to its own gravity. When the center of gravity of the wind turbine hub 20 and the arc-shaped connecting seat 3 are on the same vertical line as the lifting point and the lifting hole 41 of the external lifting device, the wind turbine hub 20 remains in a stable state. At this time, it is in a low-altitude environment. Then, the hydraulic cylinder 5 can be controlled to drive the swing arm 4 to rotate. The rotation of the swing arm 4 causes the center of gravity of the wind turbine hub 20, the arc-shaped connecting seat 3 and the swing arm 4 to shift, thereby causing the wind turbine hub 20 to rotate and turn over. When the side wall of the swing arm 4 abuts against the inclined support plate 8, the swing arm 4 rotates to the designated position. At this time, the wind turbine hub 20 has completed its turnover. Then, the wind turbine hub 20 after being turned over is transported to the corresponding base installation position by external lifting equipment. The wind turbine hub 20 can then be installed on the base by the staff. Finally, the first connecting seat 1 and the second connecting seat 2 are removed from the wind turbine hub 20. The overall operation process is simple and convenient. Compared with the existing method of using two cranes to lift the wind turbine hub 20 and turn it over at high altitude, the construction cost is lower and the construction safety is higher.

[0057] Example 2:

[0058] Reference Figure 7 and Figure 8The difference between this embodiment and embodiment 1 is that an extension seat 10 is provided at the end of the swing arm 4 away from the arc-shaped connecting seat 3. The end of the extension seat 10 facing the swing arm 4 is hinged to the lifting hole 41 of the swing arm 4 by bolts. The other end of the extension seat 10 is provided with a connecting hole with the same inner diameter as the lifting hole 41. The extension seat 10 includes a first seat body 101 and a second seat body 102 arranged opposite to each other. A storage groove 103 is provided on the side of the first seat body 101 facing the second seat body 102 and on the side of the second seat body 102 facing the first seat body 101. A counterweight can be placed in the storage groove 103. A snap-fit ​​protrusion ring 104 is integrally formed on the side of the first seat body 101 facing the second seat body 102, and an annular groove is formed on the side of the second seat body 102 facing the first seat body 101.

[0059] Reference Figure 7 and Figure 8 In use, by adding several extension seats 10 of different sizes to the end of the swing arm 4, and hinged between adjacent extension seats 10, the overall length of the swing arm 4 is increased. At the same time, before installing the extension seats 10, the first seat body 101 and the second seat body 102 can be separated as needed, so that a counterweight block can be set in the storage groove 103 to change the overall weight of the swing arm 4, thereby adjusting the overall weight and center of gravity of the turning hoist, so as to adapt to wind turbine hubs 20 of different specifications.

[0060] Reference Figure 7 and Figure 9 Furthermore, in this embodiment, the arc-shaped connecting seat 3 is composed of two parts: a third seat body 31 and a fourth seat body 32. The fourth seat body 32 is located outside the third seat body 31. The first connecting seat 1 is hinged to the end of the fourth seat body 32, and the second connecting seat 2 is hinged to the end of the third seat body 31 away from the fourth seat body 32. The hydraulic cylinder 5 is installed at the end of the third seat body 31 near the fourth seat body 32, and the rotation axis of the hydraulic cylinder 5 and the third seat body 31 is located above the rotation axis of the fourth seat body 32 and the first connecting seat 1.

[0061] Reference Figure 7 and Figure 9 A set of positioning holes 33 is provided on the side wall of the third seat 31, and several sets of limiting holes 34 are provided on the side wall of the fourth seat 32. The several sets of limiting holes 34 are evenly distributed along the arc-shaped edge of the third seat 31. The positioning holes 33 and the limiting holes 34 are matched and arranged, and a positioning bolt 35 is inserted in the positioning hole 33. The movable end of the positioning bolt 35 passes through the positioning hole 33 and a set of limiting holes 34 and is locked by a locking nut.

[0062] Reference Figure 7 and Figure 9In use, staff can adjust the relative positions of the third seat 31 and the fourth seat 32 according to the specifications of the wind turbine hub 20 to be turned over. This is achieved by controlling the positioning bolts 35 to pass into the limiting holes 34 at different positions, thereby adjusting the overall length of the arc-shaped connecting seat 3. After the first connecting seat 1 and the second connecting seat 2 are installed with the wind turbine hub 20, the angle between the line connecting the center of gravity of the first connecting seat 1 and the center of gravity of the wind turbine hub 20 and the line connecting the center of gravity of the second connecting seat 2 and the center of gravity of the wind turbine hub 20 is controlled to be between 60 and 90 degrees. Combined with the adjustment of the length and weight of the swing arm 4, it is possible to effectively turn over wind turbine hubs 20 of different specifications and models, thus improving the overall applicability of the device.

[0063] The implementation principle of this application embodiment is as follows: In use, after the wind turbine hub 20 is transported to the designated position, the length of the arc-shaped connecting seat 3 and the length and weight of the swing arm 4 can be adjusted according to the size specifications of the wind turbine hub 20. The first connecting seat 1 and the second connecting seat 2 are fixed to the connection point of the wind turbine hub 20 with bolts. The external lifting device is connected to the lifting hole 41 on the swing arm 4. Then, the external lifting device is activated to lift the wind turbine hub 20 with the arc-shaped connecting seat 3. When the wind turbine hub 20 is lifted about one meter off the ground, that is, when the minimum turning space requirement of the wind turbine hub 20 is met, the hydraulic cylinder 5 can be controlled again. The swing arm 4 is driven to rotate, causing the center of gravity of the wind turbine hub 20, the arc-shaped connecting seat 3, and the swing arm 4 as a whole to shift, thereby causing the wind turbine hub 20 to rotate and turn over. When the side wall of the swing arm 4 abuts against the inclined support plate 8, the swing arm 4 rotates to the designated position, at which point the wind turbine hub 20 completes its turnover. Then, the wind turbine hub 20 after turning over is transported to the corresponding base installation position by external lifting equipment, and the wind turbine hub 20 can be installed on the base by the staff. Finally, the first connecting seat 1 and the second connecting seat 2 are removed from the wind turbine hub 20. The overall operation process is simple and convenient, and the overall applicability of the device is higher.

[0064] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A single-hook wheel hub turning lifting device, characterized in that: The device includes a first connecting seat (1) and a second connecting seat (2) for connecting a wind turbine hub (20), and an arc-shaped connecting seat (3) disposed between the first connecting seat (1) and the second connecting seat (2). One end of the arc-shaped connecting seat (3) is connected to the first connecting seat (1), and the other end of the arc-shaped connecting seat (3) is connected to the second connecting seat (2). There is an angle between the line connecting the first connecting seat (1) and the center of gravity of the wind turbine hub (20) and the line connecting the second connecting seat (2) and the center of gravity of the wind turbine hub (20). A swing arm (4) is rotatably connected to the arc-shaped connecting seat (3). A lifting hole (41) for connecting a lifting device is provided at the end of the swing arm (4) away from the arc-shaped connecting seat (3). A drive structure for driving the swing arm (4) to rotate is provided on the arc-shaped connecting seat (3).

2. The single-hook wheel hub turning lifting device according to claim 1, characterized in that: The angle between the line connecting the center of gravity of the first connecting seat (1) and the center of gravity of the wind turbine hub (20) and the line connecting the center of gravity of the second connecting seat (2) and the center of gravity of the wind turbine hub (20) is between 60 and 90 degrees.

3. The single-hook wheel hub turning lifting device according to claim 1, characterized in that: The drive structure includes a hydraulic cylinder (5) mounted on an arc-shaped connecting seat (3). The cylinder body end of the hydraulic cylinder (5) is hinged to one end of the arc-shaped connecting seat (3) near the first connecting seat (1). The piston rod end of the hydraulic cylinder (5) is hinged to one end of the swing arm (4) away from the lifting hole (41). The hinge point between the piston rod end of the hydraulic cylinder (5) and the swing arm (4), the lifting hole (41), and the rotation point between the swing arm (4) and the arc-shaped connecting seat (3) are arranged in a triangle.

4. The single-hook wheel hub turning lifting device according to claim 3, characterized in that: The first connecting seat (1) and the arc-shaped connecting seat (3) are rotatably connected by the first pivot pin (6), and the second connecting seat (2) and the arc-shaped connecting seat (3) are rotatably connected by the second pivot pin (7).

5. The single-hook wheel hub turning lifting device according to claim 4, characterized in that: The first connecting seat (1) includes a base plate (11) bolted to the wind turbine hub (20) and two ear plates (12) fixed on the base plate (11). The two ear plates (12) are arranged in parallel and are perpendicular to the base plate (11). The arc-shaped connecting seat (3) is located between the two ear plates (12) and is rotatably connected to the ear plates (12).

6. The single-hook wheel hub turning lifting device according to claim 5, characterized in that: A triangular plate (13) is also provided between the ear plate (12) and the base plate (11), and the two right-angled sides of the triangular plate (13) are fixedly connected to the ear plate (12) and the base plate (11) respectively.

7. The single-hook hub turning and lifting device according to claim 1, characterized in that: The swing arm (4) includes two parallel side plates (42) and a horizontal plate (43) disposed between the two side plates (42). The two ends of the horizontal plate (43) are fixedly connected to the corresponding side plates (42). There are several horizontal plates (43), and several weight-reducing cavities (44) are formed between the several horizontal plates (43) and the two side plates (42).

8. The single-hook wheel hub turning lifting device according to claim 1, characterized in that: The arc-shaped connecting seat (3) is also provided with a limiting structure for limiting the rotation angle of the swing arm (4).

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