Hoisting device for polishing large workpiece

Abstract

The invention discloses a hoisting device for grinding and machining a large workpiece, and mainly relates to the field of workpiece hoisting. Comprising a lifting top plate and a towing ring which are matched with the two ends of a wind power hub body for use, a lifting hook is arranged on the lifting top plate, a front hole and a main shaft mounting hole are formed in the two opposite ends of the wind power hub body respectively, a main shaft flange is arranged on the outer side of the main shaft mounting hole, and a plurality of paddle mounting holes are formed in the side face of the wind power hub body. An annular mounting plate is arranged in the paddle mounting hole, a paddle flange is arranged on the outer side of the paddle mounting hole, a plurality of lifting rods are arranged between the lifting top plate and the towing ring, and telescopic ropes are arranged between the lifting rods and the lifting top plate and between the lifting rods and the towing ring. The hoisting device has the beneficial effects that the technical problems that potential safety hazards exist and hoisting is difficult when large workpieces such as wind power hubs are hoisted can be solved, by arranging the multiple stable hoisting anchor points, inclination or shaking of the workpieces in the hoisting process is avoided, and hoisting convenience and safety are improved.

Description

Technical Field

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

[0002] Large workpieces such as existing wind turbine hubs need to be polished at designated locations during later inspection and maintenance to remove rust and other impurities. When such large workpieces are hoisted and transferred to the polishing site, it is difficult to hoist and transfer them due to their large size and lack of stable hoisting anchor points. In addition, the traditional hoisting method generally binds the lifting rope to the opening position of the wind turbine hub. During the hoisting process, it is difficult to keep the position of the lifting rope relatively fixed with the workpiece. Once the two slide relative to each other, it is easy to cause the workpiece to shake or even tilt. Therefore, there are also great safety hazards during the hoisting process. Summary of the invention

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

[0004] In order to achieve the above object, the present invention is implemented through the following technical solutions: A hoisting device for grinding large workpieces comprises a hoisting top plate and a drag ring used in conjunction with two ends of a wind turbine hub body, a hoisting hook is arranged on the hoisting top plate, the wind turbine hub body is placed on a grinding table by hoisting, a front hole and a main shaft mounting hole are respectively arranged at opposite ends of the wind turbine hub body, a main shaft flange is arranged on the outer side of the main shaft mounting hole, the main shaft flange contacts the grinding table, the hoisting top plate and the drag ring are respectively used in conjunction with the front hole and the main shaft flange, a plurality of blade mounting holes are arranged on the side of the wind turbine hub body, an annular mounting plate is arranged inside the blade mounting hole, a blade flange is arranged on the outer side of the blade mounting hole, a plurality of suspension rods used in conjunction with the blade flanges are arranged between the hoisting top plate and the drag ring, and the suspension rods are connected to the main shaft Retractable ropes are provided between the lifting top plate, the lifting rod and the drag ring, the lifting rod is provided with a fixed block and a movable block used in conjunction with the annular mounting plate, the fixed block and the movable block are both clamped and connected with the inner ring of the annular mounting plate, a tension spring is provided between the movable block and the lifting rod, an annular groove is provided on the top of the drag ring, the annular groove is vertically slidably sleeved on the outer side of the main shaft flange, a plurality of support columns are vertically slidably connected on the drag ring, the support columns penetrate the bottom of the annular groove and contact with the main shaft flange, a receiving groove for accommodating the drag ring is provided on the grinding table, the height of the support column is not less than the depth of the receiving groove, and when the support column contacts the bottom of the receiving groove, the drag ring can slide downward into the receiving groove and thus separate from the main shaft flange.

[0005] Furthermore, a plurality of penetrating sliding holes are provided at the bottom of the annular groove, the support column passes through the sliding holes and is slidably connected thereto, and a limiting top block in contact with the main shaft flange is provided at the top of the support column, and the cross-sectional diameter of the limiting top block is larger than the cross-sectional diameter of the sliding hole.

[0006] Furthermore, a limiting bottom block in contact with the bottom of the accommodating 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, and a reset spring is provided between the bottom of the drag ring and the limiting bottom block.

[0007] Furthermore, the limiting top block and the limiting bottom block are both provided with anti-slip stripes.

[0008] Furthermore, the longitudinal sections of the fixed block and the movable block are both L-shaped, the transverse portion of the L-shape contacts the inner ring of the annular mounting plate, and the vertical portion of the L-shape contacts the side wall of the annular mounting plate.

[0009] Furthermore, a slide groove is provided on the suspension rod, the L-shaped transverse part of the movable clamping block is slidably connected in the slide groove, and the tension spring is located between the movable clamping block and the side wall of the slide groove.

[0010] Furthermore, a guide column is provided inside the slide groove, the guide column passes through the L-shaped transverse part of the movable block and is slidably connected thereto, and the tension spring is sleeved on the outside of the guide column.

[0011] Furthermore, the telescopic rope is an electric fall chain.

[0012] Furthermore, the electric fall chain is fixed on a hoisting top plate or a towing ring, a hook is provided on the electric fall chain, and both ends of the hoist rod are provided with lifting rings, and the hook is hung on the lifting rings.

[0013] Furthermore, a curved guard plate is provided on the side of the hoisting top plate, and the curved guard plate is in contact with the side of the wind turbine hub body.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention arranges a lifting top plate and a drag ring at opposite ends of the wind turbine hub body, thereby cooperating with the main shaft flange at the front hole on the wind turbine hub body and the main shaft mounting hole, so that the lifting top plate is firmly pressed and fixed at the front hole, and the annular groove on the drag ring is slidably sleeved on the outside of the main shaft flange, supporting the wind turbine hub body from the bottom, and a plurality of suspension rods used in conjunction with the blade flange are arranged between the lifting top plate and the drag ring, and a plurality of stable lifting anchor points are formed at the front hole, the blade mounting hole, and the main shaft mounting hole, so that the formed lifting device is firmly attached to the outside of the wind turbine hub body, so that when the lifting equipment is connected to the hook on the lifting top plate for lifting and transfer, the lifting device is not easy to slide relative to the wind turbine hub body, thereby effectively avoiding the situation that the wind turbine hub body is tilted or shaken, and greatly improving the safety of lifting; 2. The boom is provided with a fixed block and a movable block used in conjunction with the annular mounting plate. The fixed block and the movable block are firmly connected to the inner ring of the annular mounting plate through the sliding of the movable block and the cooperation with the tension spring, thereby firmly fixing the boom as a whole to the position of the blade flange, so that the boom is not easy to move relative to the wind turbine hub body during the hoisting process, and the boom can adapt to the size of the annular mounting plates on different wind turbine hub bodies, thereby making the cooperation between the hoisting device and the wind turbine hub body more convenient and stable, and the formed hoisting anchor point is more solid; 3. Telescopic ropes are provided between the boom and the hoisting top plate, and between the boom and the drag ring. The length of the telescopic ropes can be adjusted. After the boom is connected to the blade flange and the drag ring is connected to the main shaft flange, the telescopic ropes are tightened to press and fix the hoisting top plate, the boom and the drag ring on the surface of the wind turbine hub body. Each anchor point can be anchored separately and then connected and fixed, making the coordination between the hoisting device and the wind turbine hub body more efficient and convenient. 4. The drag ring is provided with a plurality of support columns, which penetrate the bottom of the annular groove and contact the main shaft flange. The polishing table is provided with a receiving groove for accommodating the drag ring. 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 drag ring slides downward into the receiving groove and is separated from the main shaft flange. In this structure, the drag ring is slidably sleeved on the outside of the main shaft flange due to the tightening of the telescopic rope during the hoisting process, and the wind turbine hub body is supported from the bottom to ensure the stability of the hoisting. When the wind turbine hub body is hoisted and placed on the polishing table, the plurality of support columns at the bottom of the drag ring The support column enters the accommodating groove and contacts the bottom of the accommodating groove. At this time, multiple support columns support the wind turbine hub body. After the telescopic rope is relaxed, the drag ring automatically slides downward into the accommodating groove under the action of gravity, thereby disengaging from the main shaft flange, exposing the side of the main shaft flange. Thereafter, the exposed side of the main shaft flange can be polished. Under the premise of ensuring effective support for the bottom of the wind turbine hub body during the lifting process, it will not interfere with the grinding of the bottom main shaft flange, greatly improving the effect of coordination with the wind turbine hub body and improving the convenience of grinding and lifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0016] Attached Figure 2 It is a front view of the present invention.

[0017] Attached Figure 3 This invention is attached Figure 2 Cross-sectional view along the AA direction.

[0018] Attached Figure 4 This invention is attached Figure 2 Cross-sectional view along the BB direction.

[0019] Attached Figure 5 This invention is attached Figure 4 A partial enlarged view of area C in the middle.

[0020] Attached Figure 6 This invention is attached Figure 4 A partial enlarged view of area D in the middle.

[0021] Numbers shown in the accompanying drawings: 1. Wind turbine hub body; 2. Lifting top plate; 3. Drag ring; 4. Hook; 5. Grinding table; 6. Front hole; 7. Main shaft mounting hole; 8. Main shaft flange; 9. Blade mounting hole; 10. Annular mounting plate; 11. Blade flange; 12. Hanging rod; 13. Fixed block; 14. Moving block; 15. Tension spring; 16. Annular groove; 17. Support column; 18. Accommodating groove; 19. Sliding hole; 20. Limiting top block; 21. Limiting bottom block; 22. Reset spring; 23. Slide groove; 24. Guide column; 25. Electric fall chain; 26. Hook; 27. Lifting ring; 28. Arc guard plate. DETAILED DESCRIPTION

[0022] 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 are not intended 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 fall within the scope limited by the application equally.

[0023] Reference Figure 1 and Figure 2The present invention is a hoisting device for grinding large workpieces. The main structure includes a hoisting top plate 2 and a drag ring 3 used in conjunction with the two ends of a wind turbine hub body 1. The wind turbine hub body 1 is a connecting structure between the blades and the main shaft of a wind turbine generator. The overall profile is a hollow sphere. A plurality of mounting holes are provided on the surface for connecting and mounting the blades and the main shaft. The hoisting top plate 2 is connected to the hoisting equipment. The cross section of the drag ring 3 is an annular structure. The drag ring 3 contacts the bottom of the wind turbine hub body 1 and is used to support the wind turbine hub body 1 during the hoisting process to avoid the risk of falling. The hoisting top plate 2 is welded or integrated. The wind turbine hub body 1 is fixed with a hook 4, and the wind turbine hub body 1 is placed on a grinding table 5 by hoisting. The grinding table 5 is used to carry the wind turbine hub body 1. The flange side and the bolt hole of the flange of the wind turbine hub body 1 on the grinding table 5 are ground by a grinding robot to remove rust on the side or in the bolt hole, so as to achieve effective cleaning and maintenance of the wind turbine hub body 1. The opposite ends of the wind turbine hub body 1 are respectively provided with a front hole 6 and a main shaft mounting hole 7. The front hole 6 is a channel for repairing and inspecting the wind turbine hub body 1, and the internal components can be inspected and maintained without disassembling. The main shaft mounting hole 7 is used to The main shaft of the wind turbine hub is connected, and the two are located at opposite ends of the wind turbine hub body 1. The outer side of the main shaft mounting hole 7 is fixed with a main shaft flange 8 by welding or integral molding. The main shaft flange 8 is connected to the flange on the main shaft of the wind turbine hub by bolts. The main shaft flange 8 is in contact with the grinding table 5, that is, the main shaft flange 8 of the wind turbine hub body 1 is placed on the grinding table 5 as the bottom after hoisting, which is convenient for grinding multiple mounting hole positions on the side. The hoisting top plate 2 and the drag ring 3 are used in conjunction with the front hole 6 and the main shaft flange 8 respectively, that is, the position of the front hole 6 is at the top during hoisting, 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 drag ring 3 is fixed at the main shaft flange 8 to support the wind turbine hub body 1. The side of the wind turbine hub body 1 is provided with a plurality of blade mounting holes 9, and the blade mounting holes 9 are used to install the blades of the wind power generation equipment. The inside of the blade mounting hole 9 is fixed with an annular mounting plate 10 by welding or bolts, and the annular mounting plate 10 is provided with a plurality of motor mounting holes for installing the variable pitch motor of the blade and other equipment. The outer side of the blade mounting hole 9 is fixed with a blade flange 11 by welding or integral molding, and the blade flange 11 is connected to the flange on the blade of the wind power generation equipment by bolts; A plurality of suspension rods 12 for use with the blade flange 11 are arranged between the lifting top plate 2 and the drag ring 3. The blade mounting holes 9 are generally 3, and can also be set according to actual use requirements. The corresponding blade flanges 11 and suspension rods 12 are also 3 corresponding ones. The two ends of the suspension rod 12 are respectively connected to the lifting top plate 2 and the drag ring 3. The suspension rod 12 is fixed on the blade flange 11 outside the blade mounting hole 9, thereby forming a lifting anchor point at each blade flange 11 to ensure the stability of the connection between the lifting device and the wind turbine hub body 1. Telescopic ropes are arranged between the suspension rod 12 and the lifting top plate 2, and between the suspension rod 12 and the drag ring 3. The telescopic rope adopts a stainless steel rope structure with adjustable length to ensure sufficient load-bearing strength while ensuring the connection effect. The structure allows multiple lifting anchor points to be installed separately. The telescopic rope is loosened before installation. After the multiple lifting anchor points are installed, the telescopic rope is tightened, so that the lifting device is firmly attached to the wind turbine hub body 1, making the cooperation between the lifting device and the wind turbine hub body 1 more convenient and efficient. The suspension rod 12 is provided with a fixed card block 13 and a movable card block 14 used in conjunction with the annular mounting plate 10. When the suspension rod 12 contacts the blade flange 11, the fixed card block 13 and the movable card block 14 thereon are respectively clamped at the inner ring of the annular mounting plate 10. The fixed card block 13 and the movable card block 14 are both clamped and connected with the inner ring of the annular mounting plate 10. A tension spring 15 is provided between the movable card block 14 and the suspension rod 12. Such a structure is first directed toward the wind turbine hub body 1 during installation. The movable clamping block 14 is slid in the direction of the fixed clamping block 13 to stretch the tension spring 15, and then the fixed clamping block 13 is clamped on one side of the inner ring of the annular mounting plate 10, and then the movable clamping block 14 is released. Under the action of the tension spring 15, the movable clamping block 14 automatically slides and resets to be clamped on the other side of the annular mounting plate 10. During hoisting, the top fixed clamping block 13 plays a major load-bearing role, and the bottom movable clamping block 14 plays a limiting role, which is used to maintain the clamping state of the boom 12 and the annular mounting plate 10 to prevent the boom 12 from separating from the blade flange 11. The top of the drag ring 3 is provided with an annular groove 16, which is recessed downward from the top of the drag ring 3. The annular groove 16 is vertically slidably sleeved on the outer side of the main shaft flange 8. Such a structure makes the drag ring 3 When contacting with the bottom of the wind turbine hub body 1 for support, the annular groove 16 is sleeved on the outside of the main shaft flange 8, so that the drag ring 3 and the main shaft flange 8 maintain a firmly connected state, which plays a more firm and effective supporting effect and avoids the separation of the drag ring 3 and the wind turbine hub body 1. The drag ring 3 is vertically slidably connected with a plurality of support columns 17, and the support columns 17 penetrate the bottom of the annular groove 16 and contact with 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 drag ring 3 so that the top of the support columns 17 contacts with the main shaft flange 8. The polishing table 5 is provided with a receiving groove 18 for accommodating the drag ring 3. The setting of the receiving groove 18 enables the wind turbine hub body 1 to be placed on the polishing table 5.The drag ring 3 sleeved on the bottom main shaft flange 8 enters the receiving groove 18, and the multiple support columns 17 on the drag ring 3 also enter the receiving groove 18. The height of the support column 17 is not less than the depth of the receiving groove 18, so that when the bottom of the support column 17 contacts the bottom of the receiving groove 18, the main shaft flange 8 contacting the top of the support column 17 will not enter the interior of the receiving groove 18 but will be located above the grinding table 5, so that the side of the main shaft flange 8 can be exposed, which is convenient for grinding the side of the main shaft flange 8. When the support column 17 contacts the bottom of the receiving groove 18, the drag ring 3 can slide downward into the receiving groove 18 and thus be separated from the main shaft flange 8. Such a structure enables multiple support columns 17 to contact the bottom of the receiving groove 18 to form a stable support for the wind turbine hub body 1 After that, the telescopic rope on the drag ring 3 is relaxed, and the drag ring 3 can automatically slide downward and disengage from the main shaft flange 8 under the action of gravity. Since the height of the support column 17 is greater than the depth of the accommodating groove 18, the main shaft flange 8 is automatically exposed and located above the grinding table 5. Under the premise of using the annular groove 16 to be sleeved on the outside of the main shaft flange 8 to effectively support the wind turbine hub body 1, such a structure automatically exposes the main shaft flange 8 at the bottom when the wind turbine hub body 1 is placed on the grinding table 5, thereby ensuring the subsequent smooth grinding of the side of the main shaft flange 8, so that the lifting device will not interfere with the normal grinding of the main shaft flange 8, ensuring the convenience and fluency of the subsequent inspection and maintenance, and making the cooperation between the lifting device and the wind turbine hub body 1 more convenient and smooth.

[0024] Preferably, refer to Figure 6 The bottom of the annular groove 16 is provided with a plurality of penetrating sliding holes 19, and the support column 17 passes through the sliding holes 19 and is slidably connected thereto. Such a structure enables the support column 17 to slide vertically relative to the drag ring 3 after passing through the sliding holes 19, so that the vertical sliding structure is more smooth and stable. The top of the support column 17 is fixed with a limiting top block 20 in contact with the main shaft flange 8 by welding or bolts. The cross-sectional diameter of the limiting top block 20 is larger than the cross-sectional diameter of the sliding hole 19. When the annular groove 16 on the drag ring 3 is vertically slidably sleeved on the outer side of the main shaft flange 8, the support column 17 automatically slides downward under the action of gravity so that the limiting top block 20 contacts the bottom of the main shaft flange 8. Since the cross-sectional size of the limiting top block 20 is larger than the sliding hole 19, the support column 17 will not be separated from the drag ring 3, thereby ensuring the stability of the relative structure of the support column 17 and the drag ring 3, and ensuring the subsequent effective support of the wind turbine hub body 1 by the support column 17.

[0025] Preferably, a limiting bottom block 21 in contact with the bottom of the receiving groove 18 is fixed at the bottom of the support column 17 by welding or bolts, and the cross-sectional diameter of the limiting 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 so that the drag ring 3 slides downward under the action of gravity and separates from the main shaft flange 8, the setting of the limiting bottom block 21 can prevent the drag ring 3 from being separated from the support column 17, so that the drag ring 3 can be timely and accurately sleeved on the main shaft flange 8 when the wind turbine hub body 1 is subsequently lifted again. The outer side of the main shaft flange 8 ensures the subsequent smooth lifting. A reset spring 22 is provided between the bottom of the drag ring 3 and the limiting bottom block 21. The setting of the reset spring 22 enables the drag ring 3 to slide upward and be sleeved on the outside of the main shaft flange 8 to stretch the reset spring 22. When the support column 17 contacts the bottom of the accommodating groove 18 so that the drag ring 3 loses the pulling effect of the telescopic rope, the drag ring 3 slides downward into the accommodating groove 18 under the dual action of gravity and the reset spring 22, so that the drag ring 3 and the main shaft flange 8 can be separated more smoothly.

[0026] Preferably, the limiting top block 20 and the limiting bottom block 21 are both provided with anti-slip stripes. The setting of the anti-slip stripes allows the contact position between the limiting top block 20 and the main shaft flange 8, and the contact position between the limiting bottom block 21 and the bottom of the accommodating groove 18 to maintain a large friction force, making it difficult for the contact surfaces to slide and dislocate relative to each other, thereby forming a more stable support structure for the wind turbine hub body 1.

[0027] Preferably, refer to Figure 3 and Figure 4 The longitudinal sections of the fixed block 13 and the movable 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 L-shaped corner to be smoothly stuck in the inner ring of the annular mounting plate 10, so that 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, avoiding the separation of the suspension rod 12 and the blade flange 11, and further improving the stability of the connection between the suspension rod 12 and the blade flange 11.

[0028] Preferably, refer to Figure 5The suspension rod 12 is provided with a slide groove 23, and the slide groove 23 runs through one side of the suspension rod 12. The L-shaped lateral part of the movable block 14 is slidably connected in the slide groove 23, and the tension spring 15 is located between the movable block 14 and the side wall of the slide groove 23. Such a structure enables the movable block 14 to slide up and down in the slide groove 23 when sliding relative to the suspension rod 12, providing a guide limit for the sliding of the movable block 14, ensuring the stability and accuracy of the sliding cooperation between the movable block 14 and the suspension rod 12, and the tension spring 15 between the two can be accurately stretched during sliding, so that the subsequent sliding reset of the movable block 14 is more accurate and stable.

[0029] Preferably, a guide column 24 is fixed to the interior of the slide groove 23 by welding or integral molding, and the guide column 24 passes through the L-shaped transverse part of the movable block 14 and is slidably connected thereto, and the tension spring 15 is sleeved on the outside of the guide column 24. The setting of the guide column 24, on the one hand, prevents the movable block 14 from detaching from the slide groove 23 when sliding, and on the other hand, provides support for the tension spring 15, so that the tension spring 15 remains in a vertical state during telescopic movement and is not prone to bending, thereby ensuring the accuracy of the subsequent sliding reset of the movable block 14.

[0030] Preferably, the telescopic rope is an electric fall chain 25, which utilizes the rotation of the motor to achieve the tightening or loosening of the rope, thereby achieving the change of the rope length, which can meet the telescopic requirements while maintaining sufficient load-bearing strength, and further improves the convenience of connecting the boom 12 with the lifting top plate 2 and the towing ring 3.

[0031] Preferably, the electric fall chain 25 is fixed to the lifting top plate 2 or the towing ring 3 by welding or bolts, and a hook 26 is provided on the electric fall chain 25. Specifically, the hook 26 is fixed to the rope end of the electric fall chain 25. Both ends of the suspension rod 12 are fixed with lifting rings 27 by welding or bolts, and the hook 26 is hung on the lifting ring 27. Such a structure enables the electric fall chain 25 to be connected or separated from the lifting ring 27 on the suspension rod 12 through the hook 26, so that the lifting device can be disassembled and divided into several parts, which is convenient for movement and storage, and is also more convenient during installation, further improving the convenience of use and storage of the lifting device.

[0032] Preferably, the side of the lifting top plate 2 is welded or integrally formed with an arc-shaped guard plate 28, and the arc-shaped guard plate 28 is in contact with the side of the wind turbine hub body 1. The setting of the arc-shaped guard plate 28 can increase the contact area by contacting the side of the wind turbine hub body 1, so that the lifting top plate 2 can be better connected and cooperated with the front hole 6, thereby increasing the stability of the contact between the lifting top plate 2 and the top of the wind turbine hub body 1, and further improving the stability of the lifting device during the lifting process.

[0033] Working principle: The present invention arranges a hoisting top plate 2 and a drag ring 3 at opposite ends of the wind turbine hub body 1, so as to cooperate with the main shaft flange 8 at the front hole 6 and the main shaft mounting hole 7 on the wind turbine hub body 1, so that the hoisting top plate 2 is firmly pressed and fixed at the front hole 6, and the annular groove 16 on the drag ring 3 is slidably sleeved on the outside of the main shaft flange 8, supporting the wind turbine hub body 1 from the bottom, and a plurality of hanging rods 12 used for matching the blade flange 11 are arranged between the hoisting top plate 2 and the drag ring 3, and the front hole 6 and the blade mounting hole 7 are provided. 9. A plurality of stable lifting anchor points are formed at the main shaft mounting hole 7, so that the formed lifting device is firmly attached to the outer side of the wind turbine hub body 1, so that when the lifting device is connected to the hook 4 on the lifting top plate 2 for lifting and transfer, the lifting device is not easy to slide relative to the wind turbine hub body 1, thereby effectively avoiding the situation that the wind turbine hub body 1 tilts or shakes, greatly improving the safety of lifting; a fixed card block 13 and a movable card block 14 used in conjunction with the annular mounting plate 10 are arranged on the suspension rod 12, through The sliding movement of the movable block 14 and the cooperation with the tension spring 15, the fixed block 13 and the movable block 14 are firmly connected to the inner ring of the annular mounting plate 10, and then the suspension rod 12 is firmly fixed to the position of the blade flange 11 as a whole, so that the suspension rod 12 is not easy to move relative to the wind turbine hub body 1 during the lifting process, and the suspension rod 12 can adapt to the size of the annular mounting plate 10 on different wind turbine hub bodies 1, so that the cooperation between the lifting device and the wind turbine hub body 1 is more convenient and stable, and the lifting anchor formed The points are more secure; telescopic ropes are provided between the boom 12 and the hoisting top plate 2, and between the boom 12 and the drag ring 3, and the length of the telescopic ropes can be changed and adjusted, so that after the boom 12 and the blade flange 11 are connected, and the drag ring 3 and the main shaft flange 8 are connected, the telescopic ropes are tightened to press and fix the hoisting top plate 2, the boom 12, and the drag ring 3 on the surface of the wind turbine hub body 1, and each anchor point can be anchored separately and then connected and fixed, so that the cooperation between the hoisting device and the wind turbine hub body 1 is more efficient and convenient;The drag ring 3 is provided with a plurality of support columns 17, which penetrate the bottom of the annular groove 16 and contact the main shaft flange 8. The polishing table 5 is provided with a receiving groove 18 for accommodating the drag ring 3, and 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 drag ring 3 slides downward into the receiving groove 18 and thus separates from the main shaft flange 8. In such a structure, during the hoisting process, the drag ring 3 is slidably sleeved on the outer side of the main shaft flange 8 due to the tightening of the telescopic rope, and the wind turbine hub body 1 is supported from the bottom to ensure the stability of the hoisting. When the wind turbine hub body 1 is hoisted and placed on the polishing table 5, the bottom of the drag ring 3 The multiple support columns 17 at the bottom enter the receiving groove 18 and contact the bottom of the receiving groove 18. At this time, the multiple support columns 17 support the wind turbine hub body 1. After the telescopic rope is relaxed, the drag ring 3 automatically slides downward into the receiving groove 18 under the action of gravity, thereby separating from the main shaft flange 8, exposing the side of the main shaft flange 8. After that, the exposed side of the main shaft flange 8 can be polished. Under the premise of ensuring that the bottom of the wind turbine hub body 1 is effectively supported during the hoisting process, it will not interfere with the polishing of the bottom main shaft flange 8, greatly improving the effect of cooperation with the wind turbine hub body 1 and improving the convenience of polishing and hoisting. ;

Claims

1. A hoisting device for grinding large workpieces, comprising a hoisting top plate (2) and a towing ring (3) used in conjunction with two ends of a wind turbine hub body (1), wherein a hook (4) is provided on the hoisting top plate (2), and the wind turbine hub body (1) is placed on a grinding table (5) by hoisting, characterized in that: The wind turbine hub body (1) is provided with a front hole (6) and a main shaft mounting hole (7) at opposite ends thereof, a main shaft flange (8) is provided on the outer side of the main shaft mounting hole (7), and the main shaft flange (8) contacts the grinding table (5). The hoisting top plate (2) and the drag ring (3) are used in conjunction with the front hole (6) and the main shaft flange (8), respectively. A plurality of blade mounting holes (9) are provided on the side of the wind turbine hub body (1), an annular mounting plate (10) is provided inside the blade mounting hole (9), and a blade flange (11) is provided on the outer side of the blade mounting hole (9). A plurality of suspension rods (12) used in conjunction with the blade flange (11) are provided between the hoisting top plate (2) and the drag ring (3), and telescopic ropes are provided between the suspension rod (12) and the hoisting top plate (2), and between the suspension rod (12) and the drag ring (3). A fixing block (11) used in conjunction with the annular mounting plate (10) is provided on the suspension rod (12). 3) and a movable clamping block (14), the fixed clamping block (13) and the movable clamping block (14) are both clamped and connected with 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 drag ring (3), the annular groove (16) is vertically slidably sleeved on the outer side of the main shaft flange (8), a plurality of support columns (17) are vertically slidably connected to the drag ring (3), the support columns (17) penetrate the bottom of the annular groove (16) and contact the main shaft flange (8), a receiving groove (18) for accommodating the drag 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), and when the support column (17) contacts the bottom of the receiving groove (18), the drag ring (3) can slide downward into the receiving groove (18) and thus be separated from the main shaft flange (8).

2. A hoisting device for grinding large workpieces according to claim 1, characterized in that: A plurality of penetrating sliding holes (19) are provided at the bottom of the annular groove (16), the support column (17) passes through the sliding holes (19) and is slidably connected thereto, and 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) being greater than the cross-sectional diameter of the sliding holes (19).

3. A hoisting device for grinding large workpieces according to claim 2, characterized in that: A limiting bottom block (21) in contact with the bottom of the accommodating 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); and a return spring (22) is provided between the bottom of the drag ring (3) and the limiting bottom block (21).

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

5. A hoisting device for grinding 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 transverse portion of the L-shape contacts the inner ring of the annular mounting plate (10), and the vertical portion of the L-shape contacts the side wall of the annular mounting plate (10).

6. A hoisting device for grinding large workpieces according to claim 5, characterized in that: The suspension rod (12) is provided with a slide groove (23), the L-shaped transverse portion of the movable block (14) is slidably connected in the slide groove (23), and the tension spring (15) is located between the movable block (14) and the side wall of the slide groove (23).

7. A hoisting device for grinding large workpieces according to claim 6, characterized in that: A guide column (24) is provided inside the slide groove (23), and the guide column (24) penetrates the L-shaped transverse portion of the movable block (14) and is slidably connected thereto, and the tension spring (15) is sleeved on the outside of the guide column (24).

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

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

10. A hoisting device for grinding large workpieces according to claim 1, characterized in that: A curved guard plate (28) is provided on the side of the hoisting top plate (2), and the curved guard plate (28) is in contact with the side of the wind turbine hub body (1).

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