A hoisting device for grinding and processing large workpieces

Abstract

The present invention discloses a hoisting device for grinding and processing large workpieces, mainly relating to the field of workpiece hoisting. It includes a hoisting top plate and a towing ring which are used in cooperation with both ends of the wind power hub body. A hook is provided on the hoisting top plate. Opposite ends of the wind power hub body are respectively provided with a front hole and a spindle mounting hole. A spindle flange is provided outside the spindle mounting hole. A plurality of blade mounting holes are provided on the side surface of the wind power hub body. An annular mounting plate is provided inside the blade mounting hole, and a blade flange is provided outside the blade mounting hole. A plurality of suspension rods are provided between the hoisting top plate and the towing ring. Telescopic ropes are provided between the suspension rods and the hoisting top plate, and between the suspension rods and the towing ring. The beneficial effect of the present invention lies in that it can solve the technical problems of potential safety hazards and difficult hoisting existing during the hoisting of large workpieces such as wind power hubs. By setting a plurality of stable hoisting anchor points, the inclination or shaking of the workpiece during the hoisting process can be avoided, and the convenience and safety of hoisting are improved.

Description

Technical Field

[0001] The present invention relates to the field of workpiece hoisting, and specifically to a hoisting device for grinding and processing large workpieces. Background Art

[0002] When performing later maintenance on large workpieces such as existing wind power hubs, they need to be ground and processed at a designated location to remove rust and other impurities on them. When such large workpieces are hoisted and transferred to the grinding site, due to the large size of the workpieces and the lack of stable hoisting anchor points on them, it is relatively difficult to hoist and transfer them. Moreover, in traditional hoisting methods, the hoisting ropes are generally tied to the opening positions of the wind power hubs. It is very difficult for the positions of the hoisting ropes to remain relatively fixed with respect to the workpieces during the hoisting process. Once relative sliding occurs between the two, it is easy to cause the workpieces to shake or even tilt. Therefore, there are also relatively large safety hazards during the hoisting process. Summary of the Invention

[0003] The purpose of the present invention is to provide a hoisting device for grinding and processing large workpieces, which can solve the technical problems of safety hazards and difficult hoisting existing in the hoisting of large workpieces such as wind power hubs. By setting multiple stable hoisting anchor points, the relative stability between the hoisting device and the wind power hub is improved, the inclination or shaking of the workpiece during the hoisting process is avoided, and the convenience and safety of hoisting are improved.

[0004] To achieve the above object, the present invention is realized through the following technical solutions:

[0005] A hoisting device for grinding large workpieces, comprising a hoisting top plate and a towing ring which are used in cooperation with both ends of the main body of the wind power hub. A hook is provided on the hoisting top plate. The main body of the wind power hub is hoisted and placed on a grinding table. Opposite ends of the main body of the wind power hub are respectively provided with a front hole and a main shaft mounting hole. A main shaft flange is provided outside the main shaft mounting hole. The main shaft flange is in contact with the grinding table. The hoisting top plate and the towing ring are respectively used in cooperation with the front hole and the main shaft flange. A plurality of blade mounting holes are provided on the side surface of the main body of the wind power hub. An annular mounting plate is provided inside the blade mounting hole. A blade flange is provided outside the blade mounting hole. A plurality of suspension rods used in cooperation with the blade flange are provided between the hoisting top plate and the towing ring. Telescopic ropes are provided between the suspension rods and the hoisting top plate, and between the suspension rods and the towing ring. Fixed blocks and movable blocks used in cooperation with the annular mounting plate are provided on the suspension rods. The fixed blocks and the movable blocks are both clamped and connected to the inner ring of the annular mounting plate. A tension spring is provided between the movable block and the suspension rod. An annular groove is provided at the top of the towing ring. The annular groove is slidably sleeved outside the main shaft flange in the vertical direction. A plurality of support columns are slidably connected to the towing ring in the vertical direction. The support columns penetrate through the bottom of the annular groove and then contact the main shaft flange. A receiving groove for receiving the towing ring is provided on the grinding table. The height of the support column is not less than the depth of the receiving groove. When the support column contacts the bottom of the receiving groove, the towing ring can slide downward into the receiving groove so as to be separated from the main shaft flange.

[0006] Further, a plurality of through sliding holes are provided at the bottom of the annular groove. The support columns pass through the sliding holes and are slidably connected thereto. A limiting top block in contact with the main shaft flange is provided at the top of the support column. The cross-sectional diameter of the limiting top block is larger than the cross-sectional diameter of the sliding hole.

[0007] Further, a limiting bottom block in contact with the bottom of the receiving groove is provided at the bottom of the support column. The cross-sectional diameter of the limiting bottom block is larger than the cross-sectional diameter of the sliding hole. A return spring is provided between the bottom of the towing ring and the limiting bottom block.

[0008] Further, anti-slip stripes are provided on both the limiting top block and the limiting bottom block.

[0009] Further, the longitudinal sections of the fixed block and the movable block are both L-shaped. The horizontal part of the L-shape is in contact with the inner ring of the annular mounting plate, and the vertical part of the L-shape is in contact with the side wall of the annular mounting plate.

[0010] Further, a sliding groove is provided on the suspension rod. The horizontal part of the L-shape of the movable block is slidably connected in the sliding groove. The tension spring is located between the movable block and the side wall of the sliding groove.

[0011] Further, a guiding post is arranged inside the sliding groove. The guiding post penetrates through the horizontal part of the L-shaped moving clamping block and is slidably connected thereto. The tension spring is sleeved outside the guiding post.

[0012] Further, the telescopic rope is an electric chain hoist.

[0013] Further, the electric chain hoist is fixed on the hoisting top plate or the towing ring. A hook is arranged on the electric chain hoist. Hoisting rings are arranged at both ends of the suspender. The hook is hung on the hoisting ring.

[0014] Further, an arc-shaped guard plate is arranged on the side surface of the hoisting top plate. The arc-shaped guard plate is in contact with the side surface of the wind power hub body.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. By arranging the hoisting top plate and the towing ring at the opposite ends of the wind power hub body, the present invention is matched with the spindle flange at the front hole and the spindle mounting hole on the wind power hub body, so that the hoisting top plate is firmly pressed and fixed at the front hole, and the annular groove on the towing ring is slidably sleeved outside the spindle flange to support the wind power hub body from the bottom. A plurality of suspenders for cooperating with the blade flange are arranged between the hoisting top plate and the towing ring, and a plurality of stable hoisting anchor points are formed at the front hole, the blade mounting hole, and the spindle mounting hole, so that the formed hoisting device is firmly attached to the outside of the wind power hub body. When the hoisting device is connected to the hook on the hoisting top plate for hoisting and transferring, the hoisting device is not easy to slide relative to the wind power hub body, thereby effectively avoiding the situation that the wind power hub body tilts or shakes, and greatly improving the safety of hoisting;

[0017] 2. Fixed clamping blocks and moving clamping blocks for cooperating with the annular mounting plate are arranged on the suspender. Through the sliding of the moving clamping block and the cooperation with the tension spring, the fixed clamping block and the moving clamping block are firmly clamped at the inner ring of the annular mounting plate, thereby firmly fixing the whole suspender at the position of the blade flange, so that the suspender is not easy to move relative to the wind power hub body during hoisting, and the suspender can adapt to the sizes of the annular mounting plates on different wind power hub bodies, thereby making the cooperation between the hoisting device and the wind power hub body more convenient and stable, and the formed hoisting anchor points more firm;

[0018] 3. Telescopic ropes are arranged between the suspender and the hoisting top plate, and between the suspender and the towing ring. The length of the telescopic rope can be changed and adjusted. After the suspender is connected to the blade flange and the towing ring is connected to the spindle flange, the telescopic rope is tightened, so that the hoisting top plate, the suspender, and the towing ring are pressed and fixed on the surface of the wind power hub body. Each anchor point can complete anchoring separately and then be connected and fixed, making the cooperation between the hoisting device and the wind power hub body more efficient and convenient;

[0019] 4. Multiple support columns are provided on the towing ring. After the support columns penetrate through the bottom of the annular groove, they come into contact with the main shaft flange. A receiving groove for accommodating the towing ring is provided on the grinding table. The height of the support columns is not lower than the depth of the receiving groove. When the support columns contact the bottom of the receiving groove, the towing ring slides downward into the receiving groove and disengages from the main shaft flange. Such a structure makes the towing ring slide and sleeved outside the main shaft flange due to the tightening of the telescopic rope during the hoisting process, supporting the main body of the wind power hub from the bottom to ensure the stability of the hoisting. When the main body of the wind power hub is hoisted and placed on the grinding table, the multiple support columns at the bottom of the towing ring enter the receiving groove and contact the bottom of the receiving groove. At this time, the multiple support columns support the main body of the wind power hub. After the telescopic rope is relaxed, under the action of gravity, the towing ring automatically slides downward into the receiving groove and disengages from the main shaft flange, exposing the side surface of the main shaft flange. Thereafter, the exposed side surface of the main shaft flange can be ground. On the premise of effectively supporting the bottom of the main body of the wind power hub during the hoisting process, it will not interfere with the grinding process of the bottom main shaft flange, greatly improving the cooperation effect with the main body of the wind power hub and the convenience of grinding and hoisting. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Attached Figure 1 is a three-dimensional structural schematic diagram of the present invention.

[0021] Attached Figure 2 is a front view of the present invention.

[0022] Attached Figure 3 is the attached Figure 2 cross-sectional view taken along the A-A direction in the attached

[0023] Attached Figure 4 is the attached Figure 2 cross-sectional view taken along the B-B direction in the attached

[0024] Attached Figure 5 is the attached Figure 4 partial enlarged view of part C in the attached

[0025] Attached Figure 6 is the attached Figure 4 partial enlarged view of part D in the attached

[0026] Reference numerals shown in the drawings:

[0027] 1. Wind turbine hub body; 2. Lifting top plate; 3. Tow ring; 4. Hook; 5. Grinding table; 6. Front hole; 7. Main shaft mounting hole; 8. Main shaft flange; 9. Blade mounting hole; 10. Ring mounting plate; 11. Blade flange; 12. Suspension rod; 13. Fixed clamping block; 14. Movable clamping block; 15. Tensile spring; 16. Ring groove; 17. Support column; 18. Accommodating groove; 19. Slide hole; 20. Limit top block; 21. Limit bottom block; 22. Return spring; 23. Slide groove; 24. Guide post; 25. Electric chain hoist; 26. Hook; 27. Suspension ring; 28. Arc-shaped guard plate. Detailed implementation manners

[0028] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by this application.

[0029] Refer to Figure 1 and Figure 2, the present invention relates to a hoisting device for grinding large workpieces. The main structure includes a hoisting top plate 2 and a towing ring 3 that are used in cooperation with both ends of the wind power hub body 1. The wind power hub body 1 is a connecting structure between the blade and the main shaft of a wind power generation device. Its overall contour is a hollow sphere, and multiple mounting holes are provided on the surface for connecting and installing the blade and the main shaft. The hoisting top plate 2 is connected to the hoisting equipment. The cross-section of the towing ring 3 is an annular structure. The towing ring 3 contacts the bottom of the wind power hub body 1 and is used to support the wind power hub body 1 during hoisting to avoid the risk of falling. A hook 4 is fixedly attached to the hoisting top plate 2 by welding or integrally forming. The wind power hub body 1 is placed on the grinding table 5 by hoisting. The grinding table 5 is used to carry the wind power hub body 1, and a grinding robot is used to grind the flange side and the bolt holes of the flange of the wind power hub body 1 on the grinding table 5 to remove rust on the side or in the bolt holes, thereby achieving effective cleaning and maintenance of the wind power hub body 1. Opposite ends of the wind power hub body 1 are respectively provided with a front hole 6 and a main shaft mounting hole 7. The front hole 6 is a passage for repairing and inspecting the wind power hub body 1, and internal components can be repaired and maintained without disassembly. The main shaft mounting hole 7 is used to connect to the main shaft of the wind power generation device. The two are located at opposite ends of the wind power hub body 1. A main shaft flange 8 is fixedly attached to the outside of the main shaft mounting hole 7 by welding or integrally forming. The main shaft flange 8 is connected to the flange on the main shaft of the wind power generation device by bolts. The main shaft flange 8 contacts the grinding table 5, that is, after hoisting, the position of the main shaft flange 8 of the wind power hub body 1 is placed on the grinding table 5 as the bottom, which is convenient for grinding the positions of multiple mounting holes on the side. The hoisting top plate 2 and the towing ring 3 are respectively used in cooperation with the front hole 6 and the main shaft flange 8. That is, during hoisting, the position of the front hole 6 is above, and the position of the main shaft flange 8 is at the bottom. The hoisting top plate 2 is fixed at the front hole 6, and the towing ring 3 is fixed at the main shaft flange 8 to support the wind power hub body 1. Multiple blade mounting holes 9 are provided on the side of the wind power hub body 1. The blade mounting holes 9 are used to install the blades of the wind power generation device. An annular mounting plate 10 is fixedly attached to the inside of the blade mounting holes 9 by welding or bolts. Multiple motor mounting holes are provided on the annular mounting plate 10 for installing equipment such as pitch motors of the blades. A blade flange 11 is fixedly attached to the outside of the blade mounting holes 9 by welding or integrally forming. The blade flange 11 is connected to the flange on the blade of the wind power generation device by bolts;

[0030] A plurality of suspension rods 12 for cooperating with the blade flange 11 are provided between the hoisting top plate 2 and the towing ring 3. Generally, there are 3 blade mounting holes 9, which can also be set according to actual usage requirements. Correspondingly, there are also 3 corresponding blade flanges 11 and suspension rods 12. The two ends of the suspension rod 12 are respectively connected to the hoisting top plate 2 and the towing ring 3. The suspension rod 12 is fixed on the blade flange 11 outside the blade mounting hole 9, so as to form a hoisting anchor point at each blade flange 11, ensuring the stability of the connection between the hoisting device and the wind turbine hub body 1. Telescopic ropes are provided between the suspension rod 12 and the hoisting top plate 2, and between the suspension rod 12 and the towing ring 3. The telescopic ropes adopt a stainless steel rope structure with adjustable length, ensuring sufficient load-bearing strength on the premise of ensuring the connection effect. Such a structure enables the multiple hoisting anchor points to be installed separately. Before installation, the telescopic ropes are relaxed, and after the installation of the multiple hoisting anchor points is completed, the telescopic ropes are tightened, so that the hoisting device firmly adheres to the wind turbine hub body 1, making the cooperation between the hoisting device and the wind turbine hub body 1 more convenient and efficient. Fixed blocks 13 and movable blocks 14 for cooperating with the annular mounting plate 10 are provided on the suspension rod 12. When the suspension rod 12 contacts the blade flange 11, the fixed block 13 and the movable block 14 on it are respectively clamped at the inner ring of the annular mounting plate 10. Both the fixed block 13 and the movable block 14 are clamped and connected to the inner ring of the annular mounting plate 10. A tension spring 15 is provided between the movable block 14 and the suspension rod 12. In such a structure, during installation, the movable block 14 is first slid in the direction of the fixed block 13 to stretch the tension spring 15, and then the fixed block 13 is clamped on one side of the inner ring of the annular mounting plate 10. After that, the movable block 14 is released, and under the action of the tension spring 15, the movable block 14 automatically slides back and is clamped on the other side of the annular mounting plate 10. During hoisting, the fixed block 13 at the top plays a major load-bearing effect, and the movable block 14 below plays a limiting role to maintain the clamped state of the suspension rod 12 and the annular mounting plate 10, preventing the suspension rod 12 from separating from the blade flange 11. An annular groove 16 is provided at the top of the towing ring 3. The annular groove 16 is recessed downward from the top of the towing ring 3. The annular groove 16 is slidably sleeved on the outside of the main shaft flange 8 in the vertical direction. Such a structure enables the towing ring 3 to be in a stable connection state with the main shaft flange 8 when the towing ring 3 contacts the bottom of the wind turbine hub body 1 for support, achieving a more firm and effective support effect and preventing the towing ring 3 from detaching from the wind turbine hub body 1. A plurality of support columns 17 are slidably connected to the towing ring 3 in the vertical direction. The support columns 17 pass through the bottom of the annular groove 16 and contact the main shaft flange 8. When the annular groove 16 slides upward and is sleeved on the outside of the main shaft flange 8, the support columns 17 slide downward relative to the towing ring 3 so that the tops of the support columns 17 contact the main shaft flange 8. A receiving groove 18 for receiving the towing ring 3 is provided on the grinding table 5. The provision of the receiving groove 18 enables the wind turbine hub body 1 to be placed on the grinding table 5,The towing ring 3 sleeved on the bottom spindle flange 8 enters the receiving groove 18. At the same time, a plurality of support columns 17 on the towing ring 3 also enter the receiving groove 18. The height of the support column 17 is not lower than the depth of the receiving groove 18. When the bottom of the support column 17 contacts the bottom of the receiving groove 18, the spindle flange 8 in contact with the top of the support column 17 will not enter the interior of the receiving groove 18 but is located above the grinding table 5, so that the side surface of the spindle flange 8 can be exposed, facilitating the grinding process of the side surface of the spindle flange 8. When the support column 17 contacts the bottom of the receiving groove 18, the towing ring 3 can slide downward into the receiving groove 18 to disengage from the spindle flange 8. Such a structure enables the plurality of support columns 17 to contact the bottom of the receiving groove 18 to form a stable support for the wind power hub body 1. After that, the telescopic rope on the towing ring 3 is relaxed, and the towing ring 3 can automatically slide downward under the action of gravity to disengage from the spindle flange 8. Since the height of the support column 17 is greater than the depth of the receiving groove 18, the spindle flange 8 is automatically exposed and located above the grinding table 5. Such a structure, on the premise of using the annular groove 16 to be sleeved outside the spindle flange 8 for effectively supporting the wind power hub body 1, enables the spindle flange 8 at the bottom to be automatically exposed when the wind power hub body 1 is placed on the grinding table 5, thus ensuring the smooth grinding process of the side surface of the spindle flange 8 later, preventing the lifting device from interfering with the normal grinding process of the spindle flange 8, ensuring the convenience and smoothness of later maintenance and repair, and making the cooperation between the lifting device and the wind power hub body 1 more convenient and smooth.

[0031] Preferably, referring to Figure 6 Figure, a plurality of through sliding holes 19 are provided at the bottom of the annular groove 16. The support column 17 passes through the sliding hole 19 and is slidably connected thereto. Such a structure enables the support column 17 to slide vertically relative to the towing ring 3 after passing through the sliding hole 19, making the vertical sliding structure more smooth and stable. The top of the support column 17 is fixed with a limit top block 20 in contact with the spindle flange 8 by welding or bolts. The cross-sectional diameter of the limit top block 20 is greater than the cross-sectional diameter of the sliding hole 19. When the annular groove 16 on the towing ring 3 slides vertically and is sleeved outside the spindle flange 8, under the action of gravity, the support column 17 automatically slides downward so that the limit top block 20 contacts the bottom of the spindle flange 8. Since the cross-sectional size of the limit top block 20 is greater than that of the sliding hole 19, the support column 17 will not separate from the towing ring 3, ensuring the stability of the relative structure between the support column 17 and the towing ring 3 and ensuring the effective support of the support column 17 for the wind power hub body 1 in the future.

[0032] Preferably, a limit bottom block 21 in contact with the bottom of the receiving groove 18 is fixed to the bottom of the support column 17 by welding or bolts. The cross-sectional diameter of the limit bottom block 21 is larger than the cross-sectional diameter of the sliding hole 19. When the bottom of the support column 17 contacts the bottom of the receiving groove 18 and the drag ring 3 slides downward under the action of gravity and separates from the main shaft flange 8, the setting of the limit bottom block 21 can prevent the drag ring 3 from separating from the support column 17, so that when the wind power hub body 1 is lifted again later, the drag ring 3 can be timely and accurately sleeved outside the main shaft flange 8, ensuring the smooth subsequent hoisting. A return spring 22 is arranged between the bottom of the drag ring 3 and the limit bottom block 21. The setting of the return spring 22 enables the return spring 22 to be stretched when the drag ring 3 slides upward and is sleeved outside the main shaft flange 8. When the bottom of the support column 17 contacts the bottom of the receiving groove 18 and the drag ring 3 loses the pulling effect of the telescopic rope, the drag ring 3 slides downward into the receiving groove 18 under the dual action of gravity and the return spring 22, making the separation of the drag ring 3 from the main shaft flange 8 smoother.

[0033] Preferably, anti-slip stripes are provided on both the limit top block 20 and the limit bottom block 21. The setting of the anti-slip stripes enables the contact positions between the limit top block 20 and the main shaft flange 8 and between the limit bottom block 21 and the bottom of the receiving groove 18 to maintain a large frictional force, making the contact surfaces not easily slide and misalign relative to each other, so that the support structure formed for the wind power hub body 1 is more stable.

[0034] Preferably, referring to Figure 3 and Figure 4 , the longitudinal sections of the fixed clamping block 13 and the movable clamping block 14 are both L-shaped. The horizontal part of the L-shape contacts the inner ring of the annular mounting plate 10, and the vertical part of the L-shape contacts the side wall of the annular mounting plate 10. Such a structure enables the corner of the L-shape to be smoothly stuck at the inner ring of the annular mounting plate 10. Thus, when the horizontal part of the L-shape contacts the inner ring to provide vertical support, the vertical part of the L-shape and the suspension rod 12 can be respectively located on the inner and outer sides of the annular mounting plate 10, forming accurate contact with the annular mounting plate 10 and preventing the suspension rod 12 from separating from the blade flange 11, further improving the stability of the connection between the suspension rod 12 and the blade flange 11.

[0035] Preferably, referring to Figure 5, a chute 23 is provided on the suspension rod 12, and the chute 23 penetrates through one side of the suspension rod 12. The horizontal part of the L-shaped moving block 14 is slidably connected in the chute 23. The tension spring 15 is located between the moving block 14 and the side wall of the chute 23. Such a structure enables the moving block 14 to slide up and down in the chute 23 when sliding relative to the suspension rod 12, provides guiding and limiting for the sliding of the moving block 14, ensures the stability and accuracy of the sliding fit between the moving block 14 and the suspension rod 12, and can accurately stretch the tension spring 15 between the two during sliding, making the subsequent sliding and resetting of the moving block 14 more accurate and stable.

[0036] Preferably, a guiding post 24 is fixedly provided inside the chute 23 by welding or integrally molding. The guiding post 24 penetrates through the horizontal part of the L-shaped moving block 14 and is slidably connected thereto. The tension spring 15 is sleeved outside the guiding post 24. The setting of the guiding post 24, on the one hand, prevents the moving block 14 from detaching from the chute 23 during sliding, and on the other hand, provides support for the tension spring 15, enabling the tension spring 15 to maintain a vertical state and not easily bend during telescopic movement, ensuring the accuracy of the subsequent sliding and resetting of the moving block 14.

[0037] Preferably, the telescopic rope is an electric chain hoist 25. The electric chain hoist 25 realizes the tightening or loosening of the rope by the rotation of the motor, thereby realizing the change of the rope length, can meet the telescopic requirements while maintaining sufficient load-bearing strength, and further improves the convenience of the connection and cooperation between the suspension rod 12 and the hoisting top plate 2 and the towing ring 3.

[0038] Preferably, the electric chain hoist 25 is fixedly connected to the hoisting top plate 2 or the towing ring 3 by welding or bolts. A hook 26 is provided on the electric chain hoist 25. Specifically, the hook 26 is fixed at the end of the rope of the electric chain hoist 25. Both ends of the suspension rod 12 are fixedly connected to a hanging ring 27 by welding or bolts. The hook 26 is hung on the hanging ring 27. Such a structure enables the electric chain hoist 25 to be connected or separated from the hanging ring 27 on the suspension rod 12 through the hook 26, so that the hoisting device can be disassembled into several parts, which is convenient for movement and storage, and is also more convenient for installation, further improving the convenience of the use and storage of the hoisting device.

[0039] Preferably, an arc-shaped guard plate 28 is fixedly connected to the side of the hoisting top plate 2 by welding or integrally molding. The arc-shaped guard plate 28 is in contact with the side of the wind power hub main body 1. The setting of the arc-shaped guard plate 28 can increase the contact area by contacting the side of the wind power hub main body 1, so that the hoisting top plate 2 can better connect and cooperate with the front hole 6, thereby increasing the stability of the contact between the hoisting top plate 2 and the top of the wind power hub main body 1, and further improving the stability of the hoisting device during hoisting.

[0040] Working principle: In the present invention, hoisting top plates 2 and towing rings 3 are provided at opposite ends of the wind power hub body 1, so as to cooperate with the spindle flange 8 at the front hole 6 and the spindle mounting hole 7 on the wind power hub body 1, making the hoisting top plate 2 firmly pressed and fixed at the front hole 6, while the annular groove 16 on the towing ring 3 is slidably sleeved outside the spindle flange 8 to support the wind power hub body 1 from the bottom. A plurality of suspension rods 12 for cooperating with the blade flange 11 are provided between the hoisting top plate 2 and the towing ring 3, forming a plurality of stable hoisting anchor points at the front hole 6, the blade mounting hole 9, and the spindle mounting hole 7, so that the formed hoisting device firmly adheres to the outside of the wind power hub body 1. When the hoisting equipment is connected to the hook 4 on the hoisting top plate 2 for hoisting and transferring, the hoisting device is not prone to sliding relative to the wind power hub body 1, thereby effectively avoiding the situation of the wind power hub body 1 tilting or shaking, and greatly improving the safety of hoisting; Fixed blocks 13 and movable blocks 14 for cooperating with the annular mounting plate 10 are provided on the suspension rod 12. Through the sliding of the movable block 14 and its cooperation with the tension spring 15, the fixed block 13 and the movable block 14 are firmly clamped at the inner ring of the annular mounting plate 10, thereby firmly fixing the entire suspension rod 12 at the position of the blade flange 11, so that the suspension rod 12 is not prone to moving relative to the wind power hub body 1 during hoisting, and the suspension rod 12 can adapt to the sizes of the annular mounting plates 10 on different wind power hub bodies 1, making the cooperation between the hoisting device and the wind power hub body 1 more convenient and stable, and the formed hoisting anchor points more firm; Telescopic ropes are provided between the suspension rod 12 and the hoisting top plate 2, and between the suspension rod 12 and the towing ring 3. The length of the telescopic rope can be changed and adjusted. After the suspension rod 12 is connected to the blade flange 11 and the towing ring 3 is connected to the spindle flange 8, the telescopic rope is tightened, so as to press and fix the hoisting top plate 2, the suspension rod 12, and the towing ring 3 on the surface of the wind power hub body 1. Each anchor point can complete anchoring independently and then be connected and fixed, making the cooperation between the hoisting device and the wind power hub body 1 more efficient and convenient;The towing ring 3 is provided with a plurality of support columns 17. The support columns 17 penetrate through the bottom of the annular groove 16 and then contact the main shaft flange 8. The grinding table 5 is provided with a receiving groove 18 for receiving the towing ring 3. The height of the support columns 17 is not lower than the depth of the receiving groove 18. When the support columns 17 contact the bottom of the receiving groove 18, the towing ring 3 slides downward into the receiving groove 18 and thus disengages from the main shaft flange 8. Such a structure makes the towing ring 3 slide and sleeved on the outside of the main shaft flange 8 due to the tightening of the telescopic rope during the hoisting process, and supports the wind power hub body 1 from the bottom to ensure the stability of the hoisting. When the wind power hub body 1 is hoisted and placed on the grinding table 5, the plurality of support columns 17 at the bottom of the towing ring 3 enter the receiving groove 18 and contact the bottom of the receiving groove 18. At this time, the plurality of support columns 17 support the wind power hub body 1. After the telescopic rope is relaxed, under the action of gravity, the towing ring 3 automatically slides downward into the receiving groove 18 and thus disengages from the main shaft flange 8, exposing the side surface of the main shaft flange 8. Thereafter, the side surface of the exposed main shaft flange 8 can be polished. On the premise of ensuring the effective support of the bottom of the wind power hub body 1 during the hoisting process, it will not interfere with the grinding process of the bottom main shaft flange 8, greatly improving the matching effect with the wind power hub body 1 and the convenience of grinding and hoisting.

Claims

1. A hoisting device for grinding large workpieces, comprising a hoisting top plate (2) and a towing ring (3) which are used in cooperation with both ends of a wind power hub body (1), a hook (4) is arranged on the hoisting top plate (2), and the wind power hub body (1) is placed on a grinding table (5) through hoisting, and is characterized in that: The opposite ends of the wind power hub body (1) are respectively provided with a front hole (6) and a main shaft mounting hole (7). A main shaft flange (8) is provided outside the main shaft mounting hole (7). After hoisting, the position of the main shaft flange (8) of the wind power hub body (1) is placed on the grinding table (5) as the bottom. The hoisting top plate (2) and the towing ring (3) are respectively used in cooperation with the front hole (6) and the main shaft flange (8). A plurality of blade mounting holes (9) are provided on the side surface of the wind power hub body (1). An annular mounting plate (10) is provided inside the blade mounting hole (9). A blade flange (11) is provided outside the blade mounting hole (9). A plurality of suspension rods (12) used in cooperation with the blade flange (11) are provided between the hoisting top plate (2) and the towing ring (3). Telescopic ropes are provided between the suspension rod (12) and the hoisting top plate (2), and between the suspension rod (12) and the towing ring (3). A fixed clamping block (13) and a movable clamping block (14) used in cooperation with the annular mounting plate (10) are provided on the suspension rod (12). The fixed clamping block (13) and the movable clamping block (14) are both clamped and connected to the inner ring of the annular mounting plate (10). A tension spring (15) is provided between the movable clamping block (14) and the suspension rod (12). An annular groove (16) is provided at the top of the towing ring (3). The annular groove (16) is slidably sleeved outside the main shaft flange (8) in the vertical direction. A plurality of support columns (17) are slidably connected to the towing ring (3) in the vertical direction. The support columns (17) penetrate through the bottom of the annular groove (16) and contact the main shaft flange (8). A receiving groove (18) for receiving the towing ring (3) is provided on the grinding table (5). The height of the support column (17) is not less than the depth of the receiving groove (18). When the support column (17) contacts the bottom of the receiving groove (18), the towing ring (3) can slide downward into the receiving groove (18) to disengage from the main shaft flange (8).

2. The hoisting device for grinding and processing large workpieces according to claim 1, wherein: A plurality of through sliding holes (19) are provided at the bottom of the annular groove (16). The support columns (17) pass through the sliding holes (19) and are slidably connected thereto. A limiting top block (20) in contact with the main shaft flange (8) is provided at the top of the support column (17). The cross-sectional diameter of the limiting top block (20) is larger than the cross-sectional diameter of the sliding hole (19).

3. The hoisting device for grinding and machining of large workpieces according to claim 2, wherein: A limiting bottom block (21) in contact with the bottom of the receiving groove (18) is provided at the bottom of the support column (17). The cross-sectional diameter of the limiting bottom block (21) is larger than the cross-sectional diameter of the sliding hole (19). A return spring (22) is provided between the bottom of the towing ring (3) and the limiting bottom block (21).

4. The hoisting device for grinding and processing large workpieces according to claim 3, characterized in that: Anti-slip stripes are provided on both the limiting top block (20) and the limiting bottom block (21).

5. The hoisting device for grinding and processing large workpieces according to claim 1, characterized in that: The longitudinal sections of the fixed clamping block (13) and the movable clamping block (14) are both L-shaped. The horizontal part of the L-shape contacts the inner ring of the annular mounting plate (10), and the vertical part of the L-shape contacts the side wall of the annular mounting plate (10).

6. The hoisting device for grinding and machining of large workpieces according to claim 5, wherein: A chute (23) is provided on the suspension rod (12). The horizontal part of the L-shaped moving clamping block (14) is slidably connected in the chute (23), and the tension spring (15) is located between the moving clamping block (14) and the side wall of the chute (23).

7. The hoisting device for grinding and machining of large workpieces according to claim 6, characterized in that: A guide post (24) is provided inside the chute (23). The guide post (24) penetrates through the horizontal part of the L-shaped moving clamping block (14) and is slidably connected thereto, and the tension spring (15) is sleeved outside the guide post (24).

8. The hoisting device for grinding and processing large workpieces according to claim 1, characterized in that: The telescopic rope is an electric chain hoist (25).

9. The hoisting device for grinding and machining of large workpieces according to claim 8, characterized in that: The electric chain hoist (25) is fixed on the hoisting top plate (2) or the towing ring (3). A hook (26) is provided on the electric chain hoist (25). Hoisting rings (27) are provided at both ends of the suspension rod (12), and the hook (26) is hung on the hoisting ring (27).

10. The hoisting device for grinding and machining large workpieces according to claim 1, wherein: An arc-shaped guard plate (28) is provided on the side of the hoisting top plate (2), and the arc-shaped guard plate (28) is in contact with the side of the wind power hub body (1).

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