A wind turbine blade downconductor system based on metal mesh lightning current conduction and its assembly device

Abstract

The present invention relates to the field of wind turbine blade design, and mainly discloses a wind turbine blade down conductor system based on metal mesh lightning current conduction and its assembly device, including a root down conductor arranged in a serpentine distribution at the root of the blade, a metal mesh system laid on the outer surface of the blade to replace the cable, a cable arranged at the tip of the blade and connected to multiple lightning receptor systems, and a tip lightning receptor at the tip of the blade for lightning reception, and the metal mesh system is composed of a main metal mesh laid in the middle of the outer surface of the blade and a first grounding metal mesh and a second grounding metal mesh overlapped at both ends of the main metal mesh. The present invention fundamentally avoids fatigue fracture of the down conductor caused by high strain of large-sized blades, and also saves the operation of pouring the down conductor on the web. Even if the down conductor is broken, the present invention only needs to polish and repair the metal mesh on the outer surface of the blade and repair it, saving maintenance time and cost.

Description

Technical Field

[0001] The invention relates to the field of wind turbine blade design, and in particular to a wind turbine blade downconductor system based on metal mesh lightning current conduction and an assembly device thereof. Background Art

[0002] Wind turbine blades are one of the core components of wind turbines. The quality of their design will be directly related to the performance and benefits of the wind turbine. Wind turbine blades are generally located in open areas or high places, so they are at risk of being struck by lightning.

[0003] In order to avoid the risk of wind turbine blades being struck by lightning, a down conductor system is generally installed on the outside of the blades. The laying of the wires in the conventional blade down conductor system is generally arranged at the center line of the web height and is cast together with the web shell. However, with the rapid development of wind power generation technology, in order to capture wind energy more efficiently, the size of blades as core components of wind turbines is getting larger and larger. The mainstream blades abroad have also entered the 90m level from the 70m level, and the mainstream blades in the domestic market have developed to 110m and above. The high axial strain brought by large-size blades poses a severe challenge to the traditional down conductor system. The root down conductor breaks frequently, and when the blades are assembled, the two pieces are often bonded to the shell last. Before the shell is bonded, the web is placed to support the two shells. The shell as the flip surface will be installed with a separate down conductor and connected to the down conductor on the web. Therefore, it is inevitable to flip the blade during assembly, and the blade is huge as a whole. Therefore, if there is insufficient support or positioning during the assembly process, the position of the blade needs to be adjusted, which will be very cumbersome.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Summary of the invention

[0005] The object of the present invention is to provide a wind turbine blade downconductor system based on metal mesh lightning current conduction and an assembly device thereof, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A wind turbine blade downconductor system based on metal mesh lightning current conduction, comprising a root downconductor arranged in a serpentine distribution at the root of the blade, a metal mesh system laid on the outer surface of the blade for replacing the cable, a cable arranged at the tip of the blade and connected to multiple lightning receptor systems, and a tip lightning receptor at the tip of the blade for lightning reception, the metal mesh system is composed of a main metal mesh laid in the middle of the outer surface of the blade, a first grounding metal mesh and a second grounding metal mesh are overlapped at both ends of the main metal mesh, the first grounding metal mesh is connected to the blade through a first grounding base, the first grounding metal mesh is connected to the tip lightning receptor through the tip downconductor, the tip downconductor is also connected to the blade body lightning receptor, the second grounding metal mesh is connected to the blade through a second grounding base, the second grounding metal mesh is also connected to the root downconductor, the root downconductor extends out of the interior of the blade and is connected to a blade root grounding device.

[0008] Furthermore, the main metal mesh exceeds the edge of the main beam width by at least 20 mm in the direction of the blade chord length, one end of the first grounding metal mesh and the second grounding metal mesh are folded and there are metal sheets at the sharp corners, the positions of the metal sheets are at the same position in the thickness direction as the first grounding base and the second grounding base placed in the blade cavity, the root down conductor is close to the inner wall of the blade shell and serpentinely distributed along the inner wall of the blade root, the root down conductor is distributed and fixed using wire clips, the wire clips and the root down conductors are connected using flexible sealant, the metal sheet is milled, a hole is drilled in the center of the metal sheet and extends along the thickness direction of the blade shell to the first grounding base and / or the second grounding base fixed in the inner cavity of the blade.

[0009] A device for assembling the above-mentioned wind turbine blade downconductor system based on metal mesh lightning current conduction, comprising a frame, wherein two frames are provided, and the two frames are fixedly connected by a connecting beam, a turning mechanism is installed on the top between the two frames, a supporting mechanism is fixedly installed on the bottom of one side of the turning mechanism, a positioning mechanism is provided above the supporting mechanism, and the positioning mechanism is fixedly installed on the top of one side of the turning mechanism facing the supporting mechanism, the turning mechanism comprises a rotating plate, a mounting shaft is fixedly installed on the center of one side of the turning plate away from the connecting beam, and the center of the side of the turning plate facing the connecting beam is fixedly connected to the turning plate on the other side through a connecting rod, a first bearing seat is fixedly installed on one side of the top of the frame, and the mounting shaft is fixedly installed on the center of the side of the turning plate facing the connecting beam. The shaft is rotatably installed in the first bearing seat, and a chain is wrapped around the outside of the rotating plate, and both ends of the chain are fixedly installed on the rotating plate. A bottom beam is fixedly installed on the bottom of the frame, and a fixed plate is fixedly installed on the top of the bottom beam. A second bearing seat is installed on the top of the fixed plate. A driving shaft is also provided at the bottom between the two frames, and both ends of the driving shaft are installed in the second bearing seat. An extension frame is also installed on the frame on one side, and a reducer is installed on the extension frame. The output shaft of the reducer is fixedly connected to the driving shaft, and the end of the reducer is also drivingly connected to a driving motor. A driving sprocket is also fixedly installed on the driving shaft near both ends, and the driving sprocket is arranged inside the chain, and the chain is connected to the driving sprocket.

[0010] Furthermore, a positioning block is fixedly installed on the outer side of the rotating plate, an assembly set is fixedly installed on the center of one side of the rotating plate facing the connecting rod, the end of the connecting rod is fixedly connected to the rotating plate through the assembly set, a fixing block is fixedly installed on the rotating plate, a bayonet is opened on the rotating plate, a U-shaped plate is provided between the two rotating plates, both ends of the U-shaped plate are fixedly installed in the bayonet, and a U-shaped frame is also fixedly installed on the bottom of the U-shaped plate.

[0011] Furthermore, a hanging frame is fixedly installed at the bottom of the top beam of the frame, a tensioning sprocket is rotatably installed at the bottom of the hanging frame, a supporting frame is fixedly installed at the bottom of the frame, a transmission sprocket is rotatably installed at the top of the supporting frame, the tensioning sprocket and the transmission sprocket are both arranged outside the chain, and an anti-collision block is fixedly installed on the side of the top of the frame away from the first bearing seat.

[0012] Furthermore, a sleeve is fixedly installed on the side of the rotating plate facing the connecting rod, the sleeve is arranged above the bayonet, the sleeve is arranged along the length direction of the bayonet, an insertion rod is penetrated inside the sleeve, a cylinder is fixedly installed on the side of the sleeve facing the bayonet, a push-pull plate is fixedly installed on the end of the output shaft of the cylinder, an end of the push-pull plate away from the cylinder is fixedly connected to the end of the insertion rod, a support plate is fixedly installed on the top of one end of the insertion rod away from the push-pull plate, a clamp is fixedly installed on the bottom of the support plate, the support plate is fixedly installed on the insertion rod through the clamp, and an assembly groove is also provided on the top side of the support plate.

[0013] Furthermore, the supporting mechanism includes an assembly plate, a fixing seat is fixedly installed on the top of the assembly plate, a supporting seat is installed on the top of the fixing seat, arc grooves are provided at the bottoms of both ends of the supporting seat, a guide rod is fixedly installed at the center of the arc groove, arc frames are integrally provided at both ends of the fixing seat, an arc hole is provided on the arc frame, the guide rod is slidably provided in the arc hole, and the bottom of the guide rod passes through the arc hole and is fixedly installed with a stopper.

[0014] Furthermore, a fixing buckle is integrally provided at the outer bottom of the fixing seat, and the fixing buckle is fixedly connected to the assembly plate. A worm gear arranged in a semicircular shape is integrally provided at the top center of the fixing seat. A third bearing seat is symmetrically installed along the center of the bottom center of the support seat. A worm is rotatably installed between the third bearing seats, and the worm is meshed with the worm gear. A right-angle plate is fixedly installed along the center of the bottom of the assembly plate, and the end of the U-shaped plate is arranged between the two right-angle plates. A positioning hole is opened at the bottom of the right-angle plate, and a positioning bolt is installed in the positioning hole.

[0015] Furthermore, the positioning mechanism includes a fixed frame, the two ends of the bottom of the fixed frame are fixedly installed in the assembly groove, the top center of the fixed frame is fixedly installed with a hydraulic cylinder, the bottom center of the hydraulic cylinder is installed with a lifting rod, the lifting rod passes through the top center of the fixed frame, and the bottom end of the lifting rod is integrally provided with an assembly frame, a fixed shaft is fixedly installed in the assembly frame, a gear is rotatably installed at the center of the fixed shaft, a vertical block is integrally provided on the inner side wall of the fixed frame, a sliding groove is provided on the side of the vertical block facing the lifting rod, the sliding groove is arranged along the length direction of the vertical block, a trapezoidal bar is slidably provided in the sliding groove, a rack is fixedly installed on the side of the trapezoidal bar away from the vertical block, the rack is meshed with the gear, and a top block is fixedly installed on the bottom of the side of the trapezoidal bar away from the gear.

[0016] Furthermore, a lifting block is provided at the bottom of the assembly frame, the top of the lifting block is fixedly connected to the two ends of the fixed shaft, a fixed sleeve is fixedly installed at the bottom center of the lifting block, a push rod is inserted into the bottom end of the fixed sleeve, and a tightening spring is also provided inside the fixed sleeve, and the tightening spring is arranged between the push rod and the lifting block.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention uses a high-ductility metal mesh system to replace the traditional metal down conductor fixed on the web, fundamentally avoiding the fatigue fracture of the down conductor caused by the high strain of large-sized blades, and also eliminating the operation of pouring the down conductor on the web. Compared with the traditional built-in blade cavity, the broken down conductor needs to be repaired by opening a window, which is not only difficult to repair due to limited space, but may also cause the increase of the cost of poor quality of the blade due to the damage of the additional structure. In the present invention, even if the down conductor is broken, it is only necessary to grind and repair the metal mesh on the outer surface of the blade and repair it, saving the maintenance time cost.

[0019] The rotating plate provided in the present invention can rotate, thereby driving the supporting mechanism and the positioning mechanism to flip synchronously, and the supporting mechanism and the positioning mechanism can position the ends of the blades, thereby driving the blades to flip synchronously, making it convenient to lay the metal mesh on the outer surface of the blades and install the web on the inner surface. After the blades are placed on the top of the supporting mechanism, the position of the positioning mechanism can be adjusted separately to ensure that the positioning mechanism can accurately position the blades without moving heavier blades.

[0020] The support mechanism provided in the present invention can change the inclination angle of its top surface, so that the support seat can be adjusted according to the shape of the blade contact surface, so that the support seat and the outer surface of the blade are in contact as much as possible, thereby improving the stability of the support, and the support seat can also be adjusted in position at both ends of the U-shaped plate through the assembly plate, so that it can better adapt to the position of the two ends of the blade. At the same time, the two top blocks used by the positioning mechanism can be stably positioned according to the shape of the blade surface, and the provided top rod can position the blade before the top block contacts the blade to ensure the stability of the positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1It is a structural schematic diagram of a wind turbine blade downconductor system based on metal mesh lightning current conduction according to an embodiment of the present invention;

[0023] Figure 2 This is a structural principle diagram of a wind turbine blade downconductor system based on metal mesh lightning current conduction according to an embodiment of the present invention;

[0024] Figure 3 is a cross-sectional view of a wind turbine blade downconductor system based on metal mesh lightning current conduction according to an embodiment of the present invention;

[0025] Figure 4 is a cross-sectional view of a wind turbine blade downconductor system based on metal mesh lightning current conduction according to an embodiment of the present invention;

[0026] Figure 5 is a structural schematic diagram of an assembly device according to an embodiment of the present invention;

[0027] Figure 6 is an assembly diagram of a flip mechanism in an assembly device according to an embodiment of the present invention;

[0028] Figure 7 is a structural schematic diagram of a flipping mechanism in an assembly device according to an embodiment of the present invention;

[0029] Figure 8 is an assembly diagram between two racks in an assembly device according to an embodiment of the present invention;

[0030] Fig. 9 is a schematic structural diagram of one side of a transfer plate in an assembly device according to an embodiment of the present invention;

[0031] Fig.10 is a schematic structural diagram of the other side of a transfer plate in an assembly device according to an embodiment of the present invention;

[0032] Fig.11 is a schematic diagram of the bottom structure of a U-shaped plate in an assembly device according to an embodiment of the present invention;

[0033] Fig.12 is a schematic structural diagram of a frame in an assembly device according to an embodiment of the present invention;

[0034] Fig.13 is a structural schematic diagram of a support mechanism in an assembly device according to an embodiment of the present invention;

[0035] Fig.14 is a schematic diagram of the bottom structure of a support base in an assembly device according to an embodiment of the present invention;

[0036] Fig.15is a schematic diagram of the top structure of a fixing seat in an assembly device according to an embodiment of the present invention;

[0037] Fig.16 is a schematic diagram of the bottom structure of an assembly plate in an assembly device according to an embodiment of the present invention;

[0038] Fig.17 is a structural schematic diagram of a positioning mechanism in an assembly device according to an embodiment of the present invention;

[0039] Fig.18 is a schematic structural diagram of a fixing frame in an assembly device according to an embodiment of the present invention;

[0040] Fig.19 is a schematic structural diagram of a trapezoidal bar in an assembly device according to an embodiment of the present invention;

[0041] Fig. 20 It is a schematic structural diagram of a fixing sleeve in an assembly device according to an embodiment of the present invention.

[0042] Reference numerals:

[0043] 100, main metal mesh; 101, first grounding metal mesh; 102, first grounding base; 103, blade body lightning arrester; 104, tip down conductor; 105, tip lightning arrester; 106, second grounding metal mesh; 107, second grounding base; 108, root down conductor; 109, blade root grounding device; 110, metal sheet; 200, blade shell; 1, frame; 2, flip mechanism; 3, support mechanism ; 4. Positioning mechanism; 5. Connecting beam; 6. Turn plate; 7. Mounting shaft; 8. Connecting rod; 9. First bearing seat; 10. Chain; 11. Positioning block; 12. Assembly set; 13. Fixing block; 14. Bayonet; 15. U-shaped plate; 16. U-shaped frame; 17. Casing; 18. Inserting rod; 19. Cylinder; 20. Push-pull plate; 21. Support plate; 22. Clamp; 23. Assembly groove; 24. Bottom beam; 25. Fixing fixed plate; 26, second bearing seat; 27, drive shaft; 28, driving sprocket; 29, extension frame; 30, reducer; 31, drive motor; 32, lifting frame; 33, tensioning sprocket; 34, support frame; 35, transmission sprocket; 36, anti-collision block; 37, assembly plate; 38, fixed seat; 39, support seat; 40, arc groove; 41, guide rod; 42, arc frame; 43, arc hole; 44, stopper; 4 5. Fixing buckle; 46. Worm gear; 47. Third bearing seat; 48. Worm; 49. Right-angle plate; 50. Positioning hole; 51. Positioning bolt; 52. Fixing frame; 53. Hydraulic cylinder; 54. Lifting rod; 55. Assembly frame; 56. Fixed shaft; 57. Gear; 58. Vertical block; 59. Slide; 60. Trapezoidal bar block; 61. Rack; 62. Top block; 63. Lifting block; 64. Fixing sleeve; 65. Top rod. DETAILED DESCRIPTION

[0044] Below, the invention is further described in conjunction with the accompanying drawings and specific embodiments:

[0045] Example 1: Please refer to Figure 1-4 According to an embodiment of the present invention, a wind turbine blade down conductor system based on metal mesh lightning current conduction comprises a root down conductor 108 arranged in a serpentine distribution at the root of the blade, a metal mesh system laid on the outer surface of the blade for replacing the cable, a cable arranged at the tip of the blade and connected to a plurality of lightning receptor systems, and a tip lightning receptor 105 at the tip of the blade for lightning reception, wherein the metal mesh system is composed of a main metal mesh 100 laid in the middle of the outer surface of the blade, and the two ends of the main metal mesh 100 are overlapped with a first grounding metal mesh 101 and a second grounding metal mesh 102. Two grounding metal meshes 106, the first grounding metal mesh 101 is connected to the blade through the first grounding base 102, the first grounding metal mesh 101 is connected to the tip lightning rod 105 through the tip down conductor 104, the tip down conductor 104 is also connected to the blade body lightning rod 103, the second grounding metal mesh 106 is connected to the blade through the second grounding base 107, and the second grounding metal mesh 106 is also connected to the root down conductor 108, the root down conductor 108 extends out of the blade and is connected to the blade root grounding device 109.

[0046] A metal blade tip is arranged at the blade tip to receive lightning. At least 10m in front of the blade tip, a down conductor with a sufficiently high cross-sectional area is used to connect the metal blade tip at one end and the grounding base with a built-in blade cavity at the other end. Multiple blade body lightning arresters 103 are also arranged in the interval according to needs and connected to the tip down conductor 104.

[0047] A main metal mesh 100 is arranged along the center of the main beam and on the outer surface of the blade at least 10m away from the blade root and the blade tip. The main metal mesh 100 exceeds the edge of the main beam width by at least 20mm in the direction of the blade chord length. A first grounding metal mesh 101 and a second grounding metal mesh 106 are overlapped at the root and the tip of the main metal mesh 100 in the axial direction. One end of the first grounding metal mesh 101 and the second grounding metal mesh 106 is folded and a metal sheet 110 is present at the tip position. The position of the metal sheet 110 is at the same position as the first grounding base 102 and the second grounding base 107 placed in the blade cavity in the thickness direction.

[0048] The root down conductor 108 is closely attached to the inner wall of the blade shell 200, and is distributed in a serpentine shape along the inner wall of the blade root. One end is connected to the second grounding base 107 built into the blade cavity, and the other end is connected to the blade root grounding device 109. The root down conductor 108 is distributed and fixed using a wire clip, and the wire clip and the root down conductor 108 are connected using a flexible sealant such as polyurethane or silicone.

[0049] The metal sheet 110 at the tip of the grounded metal mesh on the outer surface of the blade is milled, a hole is drilled in the center of the metal sheet 110 and extended along the thickness direction of the blade shell 200 to the first grounding base 102 and / or the second grounding base 107 fixed in the inner cavity of the blade, and the blade body lightning arrester 103 is installed to realize the electrical connection between the metal mesh system and the down conductor.

[0050] The metal mesh in the present technical solution can also be made of metal foil or a conductor that can transmit current. At the same time, two or more connectors in the present technical solution connect the metal mesh to the down conductor. In the present invention, the columnar lightning rod is connected to the metal mesh and the down conductor connecting structure through bolts, and the surface connection can be achieved with the down conductor system through a columnar metal body. At the same time, the serpentine distribution mentioned in the present technical solution refers to the laying method in which the down conductor presents periodic fluctuations and has multiple peaks and troughs. At the same time, the main metal mesh 100 laid on the outer surface of the blade can also be set on only one side.

[0051] Through the above scheme of the present invention, the present invention uses a high-ductility metal mesh system to replace the traditional metal down conductor fixed on the web, fundamentally avoiding the fatigue fracture of the down conductor caused by the high strain of large-size blades, and at the same time eliminating the operation of pouring the down conductor on the web. Compared with the traditional built-in blade cavity, the broken down conductor needs to be repaired by opening a window, which is not only difficult to repair due to limited space, but also may cause the increase of the cost of poor quality of the blade due to the damage of the additional structure. In the present invention, even if the down conductor is broken, it is only necessary to grind and repair the metal mesh on the outer surface of the blade and repair it, saving the maintenance time cost.

[0052] Example 2: Please refer to Figure 5-12 For the first embodiment, during the installation and assembly process of the wind turbine blade down conductor system based on the metal mesh lightning current conduction, it is necessary to adopt the process of layer pouring - placing the web - bonding the two-side shells - demoulding post-processing for processing. In order to facilitate the assembly and molding of the wind turbine blade down conductor system based on the metal mesh lightning current conduction, this embodiment also discloses an assembly device for the wind turbine blade down conductor system based on the metal mesh lightning current conduction, including a frame 1, wherein the frame 1 is provided with two frames 1, and the two frames 1 are fixedly connected by a connecting beam 5. A flipping mechanism 2 is installed on the top, and a supporting mechanism 3 is fixedly installed on the bottom of one side of the flipping mechanism 2. A positioning mechanism 4 is provided above the supporting mechanism 3. The positioning mechanism 4 is fixedly installed on the top of the flipping mechanism 2 on one side facing the supporting mechanism 3. The end of the blade is placed on the supporting mechanism 3, and then the blade on the top of the supporting mechanism 3 is positioned by the positioning mechanism 4. At this time, the outer surface of the pressed sheet can be layered and poured with a metal mesh. If the blade needs to be flipped later, the flipping mechanism 2 can be started to drive the blade to tilt and rotate as a whole, and the web and other operations can be installed on the inner side of the blade.

[0053] In order to enable the flipping mechanism 2 to drive the blade to flip as a whole, in this embodiment, the flipping mechanism 2 includes a rotating plate 6, and a mounting shaft 7 is fixedly installed at the center of one side of the rotating plate 6 away from the connecting beam 5. The center of one side of the rotating plate 6 facing the connecting beam 5 is fixedly connected to the rotating plate 6 on the other side through a connecting rod 8. A first bearing seat 9 is fixedly installed on one side of the top of the frame 1, and the mounting shaft 7 is rotatably installed in the first bearing seat 9. A chain 10 is wrapped around the outside of the rotating plate 6, and both ends of the chain 10 are fixedly installed on the rotating plate 6. A bottom beam 24 is fixedly installed at the bottom of the frame 1, and the top of the bottom beam 24 is fixed. A fixing plate 25 is installed, a second bearing seat 26 is installed on the top of the fixing plate 25, a driving shaft 27 is also provided at the bottom between the two frames 1, both ends of the driving shaft 27 are installed in the second bearing seat 26, an extension frame 29 is also installed on one side of the frame 1, a reducer 30 is installed on the extension frame 29, the output shaft of the reducer 30 is fixedly connected to the driving shaft 27, and the end of the reducer 30 is also drivingly connected to the driving motor 31, and a driving sprocket 28 is also fixedly installed on the driving shaft 27 near both ends, the driving sprocket 28 is arranged inside the chain 10, and the chain 10 is connected to the driving sprocket 28.

[0054] Start the drive motor 31, and the drive motor 31 can drive the drive shaft 27 to rotate through the reducer 30, and the drive shaft 27 can then pull the chain 10 to move through the active sprocket 28. At this time, the chain 10 can drive the rotating plate 6 to rotate through its two ends, and the rotating plate 6 will rotate on the top of the frame 1 through the mounting shaft 7. The rotation of the rotating plate 6 will drive the supporting mechanism 3 and the positioning mechanism 4 installed thereon to rotate synchronously, and the blades supported and positioned by the supporting mechanism 3 and the positioning mechanism 4 will rotate synchronously.

[0055] In order to ensure the stability of the chain 10, in this embodiment, a plurality of positioning blocks 11 are fixedly installed on the outer side of the rotating plate 6, and the positioning blocks 11 are used to position the chain 10 to ensure that the chain 10 can be stably wound around the outer side of the rotating plate 6. An assembly sleeve 12 is fixedly installed on the center of one side of the rotating plate 6 facing the connecting rod 8, and the end of the connecting rod 8 is fixedly connected to the rotating plate 6 through the assembly sleeve 12. A fixing block 13 is fixedly installed on the rotating plate 6, and the fixing block 13 is used to fix the end of the chain 10.

[0056] In order to facilitate the installation of the support mechanism 3, in this embodiment, a bayonet 14 is provided on the rotating plate 6, and a U-shaped plate 15 is provided between the two rotating plates 6. The two ends of the U-shaped plate 15 are fixedly installed in the bayonet 14. A U-shaped frame 16 is also fixedly installed at the bottom of the U-shaped plate 15. The U-shaped frame 16 can improve the rigidity of the U-shaped plate 15, and the support mechanism 3 is fixedly installed at the two ends of the U-shaped plate 15. When the two rotating plates 6 rotate, the U-shaped plate 15 can be driven to rotate synchronously through the bayonet 14, and then the blades are driven to flip through the support mechanism 3. The use of the U-shaped plate 15 to install the support mechanism 3 can ensure the stability of the two support mechanisms 3 when they are flipped synchronously.

[0057] To facilitate the installation of the positioning mechanism 4, in this embodiment, a sleeve 17 is fixedly installed on the side of the rotating plate 6 facing the connecting rod 8. The sleeve 17 is arranged above the bayonet 14 and is arranged along the length direction of the bayonet 14. An insertion rod 18 is penetrated inside the sleeve 17. A cylinder 19 is fixedly installed on the side of the sleeve 17 facing the bayonet 14. A push-pull plate 20 is fixedly installed on the end of the output shaft of the cylinder 19. The end of the push-pull plate 20 away from the cylinder 19 is fixedly connected to the end of the insertion rod 18. A support plate 21 is fixedly installed on the top of the end of the insertion rod 18 away from the push-pull plate 20. A clamp 22 is fixedly installed on the bottom of the support plate 21. The support plate 21 is fixedly installed on the insertion rod 18 through the clamp 22. An assembly groove 23 is also opened on one side of the top of the support plate 21, and the positioning mechanism 4 is installed in the assembly groove 23. The position of the insertion rod 18 can be adjusted by the cylinder 19, which in turn drives the positioning mechanism 4 to move, so that the positioning mechanism 4 can be moved along the end length direction of the U-shaped plate 15. If the position of the blade on the supporting mechanism 3 is skewed, it is only necessary to adjust the position of the positioning mechanism 4 by the cylinder 19, without moving the blade, thereby reducing the trouble of moving the blade.

[0058] In order to enable the chain 10 to drive the rotating plate 6 to rotate more stably, in the present embodiment, a hanging frame 32 is fixedly installed at the bottom of the top beam of the frame 1, and a tensioning sprocket 33 is rotatably installed at the bottom of the hanging frame 32. A supporting frame 34 is fixedly installed at the bottom of the frame 1, and a transmission sprocket 35 is rotatably installed at the top of the supporting frame 34. The tensioning sprocket 33 and the transmission sprocket 35 are both arranged on the outside of the chain 10.

[0059] In order to prevent the U-shaped plate 15 from hitting the end of the top of the frame 1 away from the first bearing seat 9 when the U-shaped plate 15 flips over with the rotating plate 6, in this embodiment, an anti-collision block 36 is fixedly installed on one side of the top of the frame 1 away from the first bearing seat 9.

[0060] Through the above-mentioned scheme of the present invention, the rotating plate 6 provided in the present invention can be rotated, thereby driving the supporting mechanism 3 and the positioning mechanism 4 to flip synchronously, and the supporting mechanism 3 and the positioning mechanism 4 can position the ends of the blades, thereby driving the blades to flip synchronously, making it convenient to lay the metal mesh on the outer surface of the blades and to install the webs on the inner surface, and after the blades are placed on the top of the supporting mechanism 3, the position of the positioning mechanism 4 can be adjusted separately to ensure that the positioning mechanism 4 can accurately position the blades without moving heavier blades.

[0061] Example 3: Please refer to Figure 13-16 For the second embodiment, when the support mechanism 3 is used to support the end of the blade, the two ends of the blade are not completely on the same plane. In order to enable the support mechanism 3 to have a larger contact surface with both ends of the blade, in this embodiment, the support mechanism 3 includes an assembly plate 37, a fixing seat 38 is fixedly installed on the top of the assembly plate 37, a support seat 39 is installed on the top of the fixing seat 38, an arc groove 40 is opened at the bottom of both ends of the support seat 39, and a guide rod 41 is fixedly installed at the center of the arc groove 40. The two ends of the fixing seat 38 are integrally provided with an arc frame 42, an arc hole 43 is opened on the arc frame 42, and the guide rod 41 is slidably arranged in the arc hole 43, and the bottom of the guide rod 41 passes through the arc hole 43 and is fixedly installed with a stopper 44. The two ends of the support seat 39 can slide in the arc hole 43 through the guide rod 41, and then the inclination angle of the support seat 39 is changed, so that the support seat 39 can support the blade well according to the position of the blade.

[0062] In order to enable the adjustment of the support seat 39 to achieve automatic locking, in this embodiment, a fixing buckle 45 is integrally provided at the outer bottom of the fixing seat 38, and the fixing buckle 45 is fixedly connected to the assembly plate 37. A worm wheel 46 arranged in a semicircular shape is integrally provided at the top center of the fixing seat 38. A third bearing seat 47 is symmetrically installed along the center of the bottom center of the support seat 39. A worm 48 is rotatably installed between the third bearing seats 47, and the worm 48 is meshed with the worm wheel 46. By rotating the worm 48 with an external force, the worm 48 can move along the length direction of the worm wheel 46 through the worm wheel 46, and at this time, the worm 48 can drive the support seat 39 to move synchronously through the third bearing seat 47, thereby realizing the change of the inclination angle of the support seat 39.

[0063] In order to stably mount the assembly plate 37 on the U-shaped plate 15, in this embodiment, a right-angle plate 49 is fixedly mounted along the center of the bottom of the assembly plate 37, and the end of the U-shaped plate 15 is arranged between the two right-angle plates 49. A positioning hole 50 is opened at the bottom of the right-angle plate 49, and a positioning bolt 51 is installed in the positioning hole 50. This arrangement allows the assembly plate 37 to move at the end of the U-shaped plate 15, and the position of the assembly plate 37 can adapt to the end position of the blade.

[0064] See also Figure 17-20 The outer surface of the blade is generally not a plane, and in order to enable the positioning mechanism 4 to stably position the blade, in this embodiment, the positioning mechanism 4 includes a fixing frame 52, the fixing frame 52 The two ends of the bottom are fixedly installed in the assembly groove 23, a hydraulic cylinder 53 is fixedly installed at the top center of the fixed frame 52, a lifting rod 54 is installed at the bottom center of the hydraulic cylinder 53, the lifting rod 54 passes through the top center of the fixed frame 52, and an assembly frame 55 is integrally provided at the bottom end of the lifting rod 54, a fixed shaft 56 is fixedly installed in the assembly frame 55, a gear 57 is rotatably installed at the center of the fixed shaft 56, a vertical block 58 is integrally provided on the inner side wall of the fixed frame 52, a slide groove 59 is opened on the side of the vertical block 58 facing the lifting rod 54, the slide groove 59 is arranged along the length direction of the vertical block 58, a trapezoidal bar 60 is slidably provided in the slide groove 59, a rack 61 is fixedly installed on the side of the trapezoidal bar 60 away from the vertical block 58, the rack 61 is meshed with the gear 57, and a top block 62 is fixedly installed on the bottom of the side of the trapezoidal bar 60 away from the gear 57.

[0065] Start the hydraulic cylinder 53, and the hydraulic cylinder 53 can drive the gear 57 to rise and fall synchronously through the lifting rod 54. When the gear 57 rises and falls, it will drive the trapezoidal bar block 60 to rise and fall synchronously through the rack 61. When the bottom end of one of the top blocks 62 first contacts the outer wall of the blade, the rack 61 on the trapezoidal bar block 60 can be limited by the trapezoidal bar block 60. At this time, the lifting rod 54 continues to move, and the gear 57 at the bottom of the lifting rod 54 will roll on the stopped rack 61. The rolling of the gear 57 will drive the rack 61 on the other side to move until the top block 62 on the other side also contacts the outer wall of the blade, thereby realizing the positioning of the blade.

[0066] In order to position the blades to a certain extent before the two top blocks 62 contact the blades, in this embodiment, a hanging block 63 is provided at the bottom of the assembly frame 55, the top of the hanging block 63 is fixedly connected to the two ends of the fixed shaft 56, a fixed sleeve 64 is fixedly installed at the bottom center of the hanging block 63, a top rod 65 is inserted inside the bottom end of the fixed sleeve 64, and a top spring (not shown) is also provided inside the fixed sleeve 64, which is arranged between the top rod 65 and the hanging block 63. When the lifting rod 54 moves, it will drive the hanging block 63 to move synchronously through the assembly frame 55, and then the top rod 65 will contact the blade first, so that the blade can be positioned first.

[0067] Through the above-mentioned scheme of the present invention, the support mechanism 3 provided in the present invention can change the inclination angle of its top surface, so that the support seat 39 can be adjusted according to the shape of the blade contact surface, so that the support seat 39 and the outer surface of the blade are in contact as much as possible, thereby improving the stability of the support, and the support seat 39 can also be adjusted in position at both ends of the U-shaped plate 15 through the assembly plate 37, so that it can better adapt to the position of the two ends of the blade. At the same time, the two top blocks 62 used by the positioning mechanism 4 can be stably positioned according to the shape of the blade surface, and the top rod 65 can be used to position the blade before the top block 62 contacts the blade to ensure the stability of the positioning.

[0068] In order to facilitate understanding of the above technical solutions of the present invention, the working principle or operation mode of the present invention in the actual process is described in detail below.

[0069] The present invention uses a high-ductility metal mesh system to replace the traditional metal down conductor fixed on the web, fundamentally avoiding the fatigue fracture of the down conductor caused by the high strain of large-sized blades, and also eliminating the operation of pouring the down conductor on the web. Compared with the traditional built-in blade cavity, the broken down conductor needs to be repaired by opening a window, which is not only difficult to repair due to limited space, but may also cause the increase of the cost of poor quality of the blade due to the damage of the additional structure. In the present invention, even if the down conductor is broken, it is only necessary to grind and repair the metal mesh on the outer surface of the blade and repair it, saving the maintenance time cost.

[0070] The rotating plate 6 provided in the present invention can rotate, thereby driving the supporting mechanism 3 and the positioning mechanism 4 to flip synchronously, and the supporting mechanism 3 and the positioning mechanism 4 can position the ends of the blades, thereby driving the blades to flip synchronously, making it convenient to lay the metal mesh on the outer surface of the blades and to install the webs on the inner surface. After the blades are placed on the top of the supporting mechanism 3, the position of the positioning mechanism 4 can be adjusted separately to ensure that the positioning mechanism 4 can accurately position the blades without moving heavier blades.

[0071] The support mechanism 3 provided in the present invention can change the inclination angle of its top surface, so that the support seat 39 can be adjusted according to the shape of the blade contact surface, so that the support seat 39 and the outer surface of the blade are in contact as much as possible, thereby improving the stability of the support, and the support seat 39 can also be adjusted at both ends of the U-shaped plate 15 through the assembly plate 37, so that it can better adapt to the position of the two ends of the blade. At the same time, the two top blocks 62 used by the positioning mechanism 4 can be stably positioned according to the shape of the blade surface, and the top rod 65 can be used to position the blade before the top block 62 contacts the blade to ensure the stability of the positioning.

[0072] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0073] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0075] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An assembly device for a wind turbine blade downconductor system based on metal mesh lightning current conduction, comprising a frame (1), characterized in that: Two frames (1) are provided, and the two frames (1) are fixedly connected via a connecting beam (5); a turning mechanism (2) is installed at the top between the two frames (1); a supporting mechanism (3) is fixedly installed at the bottom of one side of the turning mechanism (2); a positioning mechanism (4) is provided above the supporting mechanism (3); and the positioning mechanism (4) is fixedly installed at the top of one side of the turning mechanism (2) facing the supporting mechanism (3); The turning mechanism (2) comprises a rotating plate (6), a mounting shaft (7) is fixedly mounted on the center of one side of the rotating plate (6) away from the connecting beam (5), the center of one side of the rotating plate (6) facing the connecting beam (5) is fixedly connected to the rotating plate (6) on the other side via a connecting rod (8), a first bearing seat (9) is fixedly mounted on one side of the top of the frame (1), the mounting shaft (7) is rotatably mounted in the first bearing seat (9), a chain (10) is wound around the outside of the rotating plate (6), both ends of the chain (10) are fixedly mounted on the rotating plate (6), a bottom beam (24) is fixedly mounted on the bottom of the frame (1), a fixing plate (25) is fixedly mounted on the top of the bottom beam (24), and the fixing plate ( A second bearing seat (26) is installed on the top of the frame (25), a driving shaft (27) is also provided at the bottom between the two frames (1), both ends of the driving shaft (27) are installed in the second bearing seat (26), an extension frame (29) is also installed on one side of the frame (1), a reducer (30) is installed on the extension frame (29), an output shaft of the reducer (30) is fixedly connected to the driving shaft (27), and the end of the reducer (30) is also drivingly connected to a driving motor (31), and a driving sprocket (28) is fixedly installed on the driving shaft (27) near both ends, and the driving sprocket (28) is arranged inside the chain (10), and the chain (10) is connected to the driving sprocket (28); A sleeve (17) is fixedly mounted on the side of the rotating plate (6) facing the connecting rod (8); a bayonet (14) is provided on the rotating plate (6); the sleeve (17) is arranged above the bayonet (14); the sleeve (17) is arranged along the length direction of the bayonet (14); an insertion rod (18) is penetrated through the interior of the sleeve (17); a cylinder (19) is fixedly mounted on the side of the sleeve (17) facing the bayonet (14); an output shaft end of the cylinder (19) is fixedly mounted A push-pull plate (20) is provided, wherein the end of the push-pull plate (20) away from the cylinder (19) is fixedly connected to the end of the insertion rod (18), a support plate (21) is fixedly installed on the top of the end of the insertion rod (18) away from the push-pull plate (20), a clamp (22) is fixedly installed on the bottom of the support plate (21), the support plate (21) is fixedly installed on the insertion rod (18) via the clamp (22), and a mounting groove (23) is also provided on one side of the top of the support plate (21); The support mechanism (3) comprises an assembly plate (37), a fixing seat (38) is fixedly mounted on the top of the assembly plate (37), a support seat (39) is mounted on the top of the fixing seat (38), arc grooves (40) are provided at the bottom of both ends of the support seat (39), a guide rod (41) is fixedly mounted at the center of the arc groove (40), an arc frame (42) is integrally provided at both ends of the fixing seat (38), an arc hole (43) is provided on the arc frame (42), the guide rod (41) is slidably arranged in the arc hole (43), and a stopper (44) is fixedly mounted on the bottom of the guide rod (41) through the arc hole (43); The positioning mechanism (4) comprises a fixed frame (52), the bottom ends of the fixed frame (52) are fixedly installed in the assembly groove (23), a hydraulic cylinder (53) is fixedly installed at the top center of the fixed frame (52), a lifting rod (54) is installed at the bottom center of the hydraulic cylinder (53), the lifting rod (54) passes through the top center of the fixed frame (52), the bottom end of the lifting rod (54) is integrally provided with an assembly frame (55), a fixed shaft (56) is fixedly installed in the assembly frame (55), a gear (57) is rotatably installed at the center of the fixed shaft (56), and the fixed frame (52) A vertical block (58) is integrally provided on the inner side wall, a slide groove (59) is provided on the side of the vertical block (58) facing the lifting rod (54), the slide groove (59) is arranged along the length direction of the vertical block (58), a trapezoidal bar (60) is slidably arranged in the slide groove (59), a rack (61) is fixedly installed on the side of the trapezoidal bar (60) away from the vertical block (58), the rack (61) is meshed with the gear (57), and a top block (62) is fixedly installed on the bottom of the side of the trapezoidal bar (60) away from the gear (57).

2. The assembly device of a wind turbine blade downconductor system based on metal mesh lightning current conduction according to claim 1, characterized in that: A positioning block (11) is fixedly mounted on the outer side of the rotating plate (6); an assembly sleeve (12) is fixedly mounted on the center of one side of the rotating plate (6) facing the connecting rod (8); the end of the connecting rod (8) is fixedly connected to the rotating plate (6) via the assembly sleeve (12); a fixing block (13) is fixedly mounted on the rotating plate (6); a U-shaped plate (15) is provided between the two rotating plates (6); both ends of the U-shaped plate (15) are fixedly mounted in the bayonet (14); and a U-shaped frame (16) is fixedly mounted on the bottom of the U-shaped plate (15).

3. The assembly device of a wind turbine blade downconductor system based on metal mesh lightning current conduction according to claim 2, characterized in that: A hanging frame (32) is fixedly mounted on the bottom of the top beam of the frame (1); a tensioning sprocket (33) is rotatably mounted on the bottom of the hanging frame (32); a supporting frame (34) is fixedly mounted on the bottom of the frame (1); a driving sprocket (35) is rotatably mounted on the top of the supporting frame (34); the tensioning sprocket (33) and the driving sprocket (35) are both arranged outside the chain (10); and an anti-collision block (36) is fixedly mounted on a side of the top of the frame (1) away from the first bearing seat (9).

4. The assembly device of a wind turbine blade downconductor system based on metal mesh lightning current conduction according to claim 3, characterized in that: A fixing buckle (45) is integrally provided at the outer bottom of the fixing seat (38), and the fixing buckle (45) is fixedly connected to the assembly plate (37). A worm gear (46) arranged in a semicircular shape is integrally provided at the top center of the fixing seat (38). A third bearing seat (47) is symmetrically installed along the center of the bottom center of the support seat (39). A worm (48) is rotatably installed between the third bearing seats (47), and the worm (48) is meshed with the worm gear (46). A right-angle plate (49) is fixedly installed along the center of the bottom of the assembly plate (37). The end of the U-shaped plate (15) is arranged between the two right-angle plates (49). A positioning hole (50) is opened at the bottom of the right-angle plate (49), and a positioning bolt (51) is installed in the positioning hole (50).

5. The assembly device of a wind turbine blade downconductor system based on metal mesh lightning current conduction according to claim 4, characterized in that: A hanging block (63) is provided at the bottom of the assembly frame (55), the top of the hanging block (63) is fixedly connected to the two ends of the fixed shaft (56), a fixed sleeve (64) is fixedly installed at the bottom center of the hanging block (63), a push rod (65) is inserted into the bottom end of the fixed sleeve (64), and a tightening spring is also provided inside the fixed sleeve (64), and the tightening spring is arranged between the push rod (65) and the hanging block (63).

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