Wind turbine generator blade pre-detection positioning device

Abstract

The utility model relates to the technical field of wind turbine generator pre-inspection equipment, in particular to a wind turbine generator blade pre-inspection positioning device which comprises a base, a support arranged on the top of the base, a positioning assembly arranged on the right side of the support and comprising a rotating disc, a first connecting rod arranged on the right side of the rotating disc, and a circular shell arranged at the right end of the first connecting rod. The outer wall of the circular shell is rotationally connected with three threaded rods, the outer walls of the threaded rods are in threaded connection with rectangular rods, the right sides of the rectangular rods are provided with internal clamping plates, the outer ends of the right sides of the rectangular rods are provided with external reinforcing parts, and the left side of the support is provided with a driving assembly used for driving the rotating disc to rotate. According to the wind turbine generator blade pre-detection positioning device, a bidirectional clamping structure of the internal clamping plate and the external clamping plate is adopted, the rotating function of the rotating disc is combined, multi-angle detection can be achieved only by fixing the blade at a single point, the problem that the bottom of the blade is shielded by a traditional multi-clamping mechanism is solved, it is guaranteed that no dead angle exists in detection, and the detection efficiency is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the technical field of wind turbine pre-inspection equipment, specifically a wind turbine blade pre-inspection and positioning device. Background Technology

[0002] Wind turbine blades are a crucial component of wind power generation systems, directly impacting power generation efficiency and operational lifespan. Blades are typically made of composite materials, offering advantages such as lightweight and high strength. However, quality defects such as internal material bubbles, delamination, and cracks can easily occur during production. If these problems are not detected in time, they can lead to safety hazards during operation, and in severe cases, even blade breakage or detachment, posing significant risks to equipment operation and personnel safety. Therefore, wind turbine blades require pre-inspection after production. During pre-inspection, the blades need to be positioned correctly to prevent displacement during testing.

[0003] Patent CN222222372U discloses a pre-inspection and positioning device for wind turbine blades, including a support frame. A limiting groove is formed at the top of the support frame, and a clamping mechanism is installed inside the limiting groove. The clamping mechanism includes a support plate, which is slidably connected inside the limiting groove. A support block is fixed at the top of the support plate, and a motor is embedded inside the support block. The power output end of the motor is connected to a transmission component. In this invention, the motor drives the transmission component, which in turn drives a worm gear to push a worm, allowing the limiting block to pass through the support block. The clamping width of the clamping plate can be adjusted to accommodate blades of different widths. Simultaneously, a hydraulic rod pushes a lowering block for further fixation. One set of support frames is equipped with one set of clamping mechanisms. Multiple support frames are connected and secured with bolts according to the blade length, improving applicability.

[0004] Although the device is designed to be suitable for various blade types, in practical applications, the use of multiple clamping mechanisms to hold and fix the blades increases the difficulty of inspecting the blade bottom. Furthermore, multiple support points supporting the blade can also affect the inspection results, as the blade is fixed at one end during use, and multiple support points can interfere with the accuracy of the inspection. Finally, during operation, the clamping structure relies on a motor driving a transmission component, which in turn drives a worm gear to push a worm, allowing a limit block to pass through a support block to adjust the clamping width of the clamping plate. However, the worm gear driving the worm cannot be achieved in practice, rendering the existing clamping mechanism ineffective in real-world applications. Therefore, the existing technology cannot meet the requirements for blade pre-inspection and positioning. Based on these issues, we propose a wind turbine blade pre-inspection and positioning device. Utility Model Content

[0005] The purpose of this invention is to provide a pre-inspection and positioning device for wind turbine blades to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] Wind turbine blade pre-inspection and positioning device, including base, combined with Figure 1 , Figure 3 and Figure 5 As shown, a bracket is provided at the top of the base and near the left side. The bracket is used to install the positioning component and the drive component, providing stable support. A positioning component is provided on the right side of the bracket. The positioning component is used to clamp and adjust the blade angle to achieve multi-directional detection. The positioning component includes a turntable that is rotatably connected to the bracket. The turntable rotates to drive the blade to adjust the detection angle. A first connecting rod is provided in the middle of the right side of the turntable. The first connecting rod connects the turntable and the circular housing and transmits rotational power. A circular housing is provided at the right end of the first connecting rod. The circular housing encapsulates the transmission components and protects the internal structure. A first motor is provided on the right side of the circular housing via a mounting seat. The first motor provides power to drive the clamping mechanism to extend and retract to adapt to different types of blades. The output shaft of the first motor passes through the right side of the circular housing and is coaxially connected to a driving bevel gear. The driving bevel gear meshes with the driven bevel gear to transmit power to the threaded rod.

[0008] The outer wall of the circular shell has three rectangular tubes arranged in a ring array. The rectangular tubes provide linear guidance for the threaded rod and the rectangular rod. The threaded rod is rotatably connected to the outer wall of the circular shell and inside the rectangular tubes. The threaded rod drives the rectangular rod to move by rotation to adjust the clamping distance. The bottom end of the threaded rod is provided with a driven bevel gear that meshes with the driving bevel gear. The driven bevel gear converts the power of the driving bevel gear into the rotational motion of the threaded rod. The outer wall of the threaded rod is threaded with a rectangular rod. The rectangular rod slides along the rectangular tube and drives the clamping plate to fix the blade. The right side of the rectangular rod and near the outer end is provided with an inner clamping plate. The inner clamping plate clamps the blade from the inside and prevents displacement. The outer end of the right side of the rectangular rod is provided with an external reinforcement. The external reinforcement is hydraulically driven to enhance clamping stability. The left side of the bracket is provided with a drive assembly for driving the turntable to rotate. The drive assembly drives the turntable to rotate through gear transmission.

[0009] Preferred, such as Figure 5 As shown, a second connecting rod is provided on the left side of the rectangular tube. The left end of the second connecting rod is fixedly connected to the right side of the turntable. The second connecting rod fixes the rectangular tube and the turntable to ensure synchronous rotation.

[0010] The external reinforcement includes a fixing plate fixedly connected to the right side of the rectangular rod. The fixing plate provides a mounting base for the first hydraulic cylinder. The top of the fixing plate is provided with the first hydraulic cylinder. The first hydraulic cylinder drives the external clamping plate to move up and down to strengthen the clamping force. The movable rod of the first hydraulic cylinder passes through the top of the fixing plate and is fixedly connected to the external clamping plate. The external clamping plate presses the blade from the outside for double fixation.

[0011] The top of the inner clamping plate is provided with a first rubber pad, which buffers the clamping pressure and prevents damage to the inner wall of the blade. The bottom of the outer clamping plate is provided with a second rubber pad, which enhances the anti-slip and protective properties of the outer clamping.

[0012] Preferred, such as Figure 3 As shown, the drive assembly includes a mounting bracket fixedly connected to the left side of the bracket. The mounting bracket fixes the second motor and ensures the stability of the gear transmission. The second motor is provided on the mounting bracket. Both the first motor and the second motor are powered by an external power source. The second motor provides the power source for the rotation of the turntable. The output shaft of the second motor is coaxially connected to a drive gear. The drive gear meshes with the driven gear to transmit torque.

[0013] The drive assembly also includes a rotating shaft rotatably connected to the left side of the bracket. The rotating shaft connects the driven gear and the turntable to realize power transmission. The right end of the rotating shaft is coaxially connected to the left end of the turntable shaft. The outer wall of the rotating shaft is provided with a driven gear that meshes with the driving gear. The driven gear amplifies the torque and drives the turntable to rotate.

[0014] Preferred, such as Figure 6 As shown, the top of the base is provided with an auxiliary support for supporting the blade tip. The auxiliary support adjusts the support height and width to accommodate blades of different sizes. The auxiliary support includes a second hydraulic cylinder fixedly connected to the top of the base. The second hydraulic cylinder drives the frame support plate to rise and fall to adapt to the blade height. The second hydraulic cylinder is threadedly installed on the top of the base. Both the first hydraulic cylinder and the second hydraulic cylinder are externally connected to a hydraulic drive system.

[0015] The movable rod of the second hydraulic cylinder is fixedly connected to a frame-shaped support plate. The frame-shaped support plate is equipped with a bidirectional screw and supports a U-shaped support plate. The bidirectional screw is rotatably connected between the front and rear sides of the inner wall of the frame-shaped support plate. The bidirectional screw adjusts the distance between the two U-shaped support plates by rotation. The bidirectional screw is threadedly connected to two U-shaped support plates. The U-shaped support plates slide relative to the frame-shaped support plate. The relative distance between the two U-shaped support plates can be adjusted to accommodate different types of blades. Support rollers are rotatably connected between the left and right sides of the inner wall of the U-shaped support plate. The support rollers reduce blade movement friction and assist in rotation detection. The two support rollers provide auxiliary support for the position of the blade near the connection end, improving the stability of the positioning assembly.

[0016] The front end of the bidirectional lead screw penetrates the front side of the inner wall of the frame-shaped support plate to the outside, and the front end of the bidirectional lead screw is provided with a handwheel, which facilitates manual adjustment of the rotation of the bidirectional lead screw;

[0017] The auxiliary support includes two circular uprights arranged symmetrically front to back. The circular uprights provide a vertical guide channel for the positioning vertical rod. The bottom of the circular uprights is bolted to the top of the base. The positioning vertical rod is slidably connected inside the circular uprights. The top of the positioning vertical rod is threaded to the bottom of the frame support plate. The positioning vertical rod connects the frame support plate and the circular uprights to ensure support stability.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. The wind turbine blade pre-inspection and positioning device adopts a bidirectional clamping structure with internal and external clamping plates. Combined with the rotation function of the turntable, it can achieve multi-angle detection by fixing the blade at a single point. This avoids the problem of the blade bottom being blocked by the traditional multi-clamping mechanism, ensuring no blind spots in the detection and significantly improving the detection efficiency.

[0020] 2. The wind turbine blade pre-inspection and positioning device has auxiliary support components whose support height and spacing can be flexibly adjusted according to the blade size. At the same time, it only provides auxiliary support to the blade end, simulating the actual installation state of the blade, avoiding interference from multiple support points with the test results, and ensuring that the test data is consistent with the actual working conditions.

[0021] 3. The wind turbine blade pre-inspection and positioning device has rubber pads on the internal and external clamping plates to effectively buffer the clamping pressure and prevent scratches or deformation on the blade surface; the handwheel adjustment and hydraulic lifting functions of the auxiliary support components simplify the operation process, reduce the intensity of manual intervention, and improve the convenience of inspection. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the overall structure of this utility model in use.

[0024] Figure 3 This is a schematic diagram of the assembly structure of the bracket, positioning component and driving component in this utility model;

[0025] Figure 4 This is a partial structural schematic diagram of the present invention;

[0026] Figure 5 This is a partial structural diagram of the positioning component in this utility model;

[0027] Figure 6 This is a schematic diagram of the auxiliary support structure in this utility model;

[0028] In the diagram: 1. Base; 2. Bracket; 3. Positioning assembly; 30. Turntable; 31. First connecting rod; 32. Circular housing; 33. First motor; 34. Driving bevel gear; 35. Rectangular tube; 350. Second connecting rod; 36. Threaded rod; 360. Driven bevel gear; 37. Rectangular rod; 370. Internal clamping plate; 371. First rubber pad; 38. External reinforcement; 380. Fixing plate; 381. First hydraulic cylinder; 382. External clamping plate; 383. Second rubber pad; 4. Drive assembly; 40. Mounting bracket; 41. Second motor; 42. Driving gear; 43. Rotating shaft; 44. Driven gear; 5. Auxiliary support component; 50. Second hydraulic cylinder; 51. Frame-shaped support plate; 52. Bidirectional lead screw; 53. U-shaped support plate; 54. Support roller; 55. Handwheel; 56. Circular vertical tube; 57. Positioning vertical rod. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] Please see Figures 1-6 This utility model provides a technical solution:

[0032] Wind turbine blade pre-inspection and positioning device, including base 1, combined with Figure 1 , Figure 3 and Figure 5As shown, a bracket 2 is provided on the top of the base 1 and near the left side. The bracket 2 is used to install the positioning component 3 and the drive component 4, providing stable support. The positioning component 3 is provided on the right side of the bracket 2. The positioning component 3 is used to clamp and adjust the blade angle to achieve multi-directional detection. The positioning component 3 includes a turntable 30 that is rotatably connected to the bracket 2. The turntable 30 drives the blade to adjust the detection angle by rotating. A first connecting rod 31 is provided in the middle of the right side of the turntable 30. The first connecting rod 31 connects the turntable 30 and the circular housing 32 to transmit rotational power. A circular housing 32 is provided at the right end of the first connecting rod 31. The circular housing 32 encapsulates the transmission components and protects the internal structure. A first motor 33 is provided on the right side of the circular housing 32 through a mounting seat. The first motor 33 provides power to drive the clamping mechanism to extend and retract to adapt to different types of blades. The output shaft of the first motor 33 passes through the right side of the circular housing 32 and is coaxially connected to the driving bevel gear 34. The driving bevel gear 34 meshes with the driven bevel gear 360 to transmit power to the threaded rod 36.

[0033] The outer wall of the circular housing 32 is provided with three rectangular tubes 35 arranged in a ring array. The rectangular tubes 35 provide linear guidance for the threaded rod 36 and the rectangular rod 37. The threaded rod 36 is rotatably connected to the outer wall of the circular housing 32 and located inside the rectangular tubes 35. The threaded rod 36 drives the rectangular rod 37 to move by rotation to adjust the clamping distance. The bottom end of the threaded rod 36 is provided with a driven bevel gear 360 that meshes with the driving bevel gear 34. The driven bevel gear 360 converts the power of the driving bevel gear 34 into the rotational motion of the threaded rod 36. A rectangular rod 37 is threaded onto the outer wall of the threaded rod 36. The rectangular rod 37 slides along the rectangular tube 35 and drives the clamping plate to fix the blade. An internal clamping plate 370 is provided on the right side of the rectangular rod 37 near the outer end. The internal clamping plate 370 clamps the blade from the inside and prevents it from shifting. An external reinforcement 38 is provided at the outer end of the right side of the rectangular rod 37. The external reinforcement 38 enhances the clamping stability through hydraulic drive. A drive assembly 4 for driving the turntable 30 to rotate is provided on the left side of the bracket 2. The drive assembly 4 drives the turntable 30 to rotate through gear transmission.

[0034] In this embodiment, as Figure 5 As shown, a second connecting rod 350 is provided on the left side of the rectangular tube 35. The left end of the second connecting rod 350 is fixedly connected to the right side of the turntable 30. The second connecting rod 350 fixes the rectangular tube 35 and the turntable 30 to ensure synchronous rotation.

[0035] The external reinforcement 38 includes a fixing plate 380 fixedly connected to the right side of the rectangular rod 37. The fixing plate 380 provides a mounting base for the first hydraulic cylinder 381. The first hydraulic cylinder 381 is provided on the top of the fixing plate 380. The first hydraulic cylinder 381 drives the external clamping plate 382 to move up and down to strengthen the clamping force. The movable rod of the first hydraulic cylinder 381 passes through the top of the fixing plate 380 and is fixedly connected to the external clamping plate 382. The external clamping plate 382 presses the blade from the outside for double fixation.

[0036] The top of the inner clamping plate 370 is provided with a first rubber pad 371, which buffers the clamping pressure and prevents damage to the inner wall of the blade. The bottom of the outer clamping plate 382 is provided with a second rubber pad 383, which enhances the anti-slip and protective properties of the outer clamping.

[0037] Specifically, such as Figure 3 As shown, the drive assembly 4 includes a mounting bracket 40 fixedly connected to the left side of the bracket 2. The mounting bracket 40 fixes the second motor 41 and ensures the stability of the gear transmission. The second motor 41 is mounted on the mounting bracket 40. Both the first motor 33 and the second motor 41 are connected to an external power source. The second motor 41 provides the power source for the rotation of the turntable 30. The output shaft of the second motor 41 is coaxially connected to the drive gear 42. The drive gear 42 meshes with the driven gear 44 to transmit torque.

[0038] The drive assembly 4 also includes a rotating shaft 43 rotatably connected to the left side of the bracket 2. The rotating shaft 43 connects the driven gear 44 to the turntable 30 to realize power transmission. The right end of the rotating shaft 43 is coaxially connected to the left end of the rotating shaft of the turntable 30. The outer wall of the rotating shaft 43 is provided with a driven gear 44 that meshes with the driving gear 42. The driven gear 44 amplifies the torque and drives the turntable 30 to rotate.

[0039] Furthermore, such as Figure 6 As shown, the top of the base 1 is provided with an auxiliary support 5 for supporting the blade end. The auxiliary support 5 adjusts the support height and width to adapt to blades of different sizes. The auxiliary support 5 includes a second hydraulic cylinder 50 fixedly connected to the top of the base 1. The second hydraulic cylinder 50 drives the frame support plate 51 to rise and fall to adapt to the blade height. The second hydraulic cylinder 50 is threadedly installed on the top of the base 1. Both the first hydraulic cylinder 381 and the second hydraulic cylinder 50 are externally connected to a hydraulic drive system.

[0040] The movable rod of the second hydraulic cylinder 50 is fixedly connected to a frame-shaped support plate 51. The frame-shaped support plate 51 is equipped with a bidirectional screw 52 and supports a U-shaped support plate 53. The bidirectional screw 52 is rotatably connected between the front and rear sides of the inner wall of the frame-shaped support plate 51. The bidirectional screw 52 adjusts the distance between the two U-shaped support plates 53 by rotation. The bidirectional screw 52 is threadedly connected to two U-shaped support plates 53. The U-shaped support plates 53 slide relative to the frame-shaped support plate 51. The relative distance between the two U-shaped support plates 53 can be adjusted to accommodate different types of blades. The left and right sides of the inner wall of the U-shaped support plate 53 are rotatably connected to support rollers 54. The support rollers 54 reduce blade movement friction and assist rotation detection. The two support rollers 54 provide auxiliary support for the blade near the connection end, improving the stability of the positioning assembly 3.

[0041] The front end of the bidirectional lead screw 52 extends through the front side of the inner wall of the frame support plate 51 to the outside, and the front end of the bidirectional lead screw 52 is provided with a handwheel 55, which facilitates manual adjustment of the rotation of the bidirectional lead screw 52.

[0042] The auxiliary support component 5 includes two circular risers 56 arranged symmetrically front to back. The circular risers 56 provide a vertical guide channel for the positioning vertical rod 57. The bottom of the circular risers 56 is bolted to the top of the base 1. The positioning vertical rod 57 is slidably connected inside the circular risers 56. The top of the positioning vertical rod 57 is threaded to the bottom of the frame support plate 51. The positioning vertical rod 57 connects the frame support plate 51 and the circular risers 56 to ensure the stability of the support.

[0043] In this embodiment, the wind turbine blade pre-inspection and positioning device is used by aligning the connecting end of the wind turbine blade with the positioning component 3, so that all three internal clamping plates 370 are located inside the blade connecting end. The first motor 33 of the positioning component 3 is started, driving the active bevel gear 34 and the driven bevel gear 360 to mesh and drive the threaded rod 36 to rotate and push the rectangular rod 37 to extend outward along the rectangular tube 35, so that the internal clamping plates 370 contact the inner wall of the blade. At the same time, the first hydraulic cylinder 381 of the external reinforcement 38 drives the external clamping plate 382 to press down, which, together with the second rubber pad 383, clamps the outer wall of the blade. Then, the second hydraulic cylinder 50 of the auxiliary support 5 drives the frame support. The plate 51 is raised and lowered to a suitable height, and then the handwheel 55 is turned to adjust the bidirectional lead screw 52, ​​so that the two U-shaped support plates 53 slide along the frame support plate 51 to both sides of the blade end. The support roller 54 contacts the blade surface and provides rolling support. After that, the operator can inspect the blade. The second motor 41 of the drive assembly 4 can be started, and the drive gear 42 and the driven gear 44 mesh to drive the rotating shaft 43 to rotate the turntable 30 and the first connecting rod 31, so that the circular shell 32, the rectangular tube 35 and the clamping mechanism rotate as a whole, realizing 360-degree multi-angle inspection of the blade. After the inspection is completed, the clamping pressure is released by reversing the operation, and the auxiliary support 5 is adjusted to remove the blade.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A wind turbine blade pre-certification positioning device comprising a base (1), characterized in that: The top of the base (1) and the position close to the left side is equipped with a support (2), the right side of the support (2) is equipped with a positioning assembly (3), the positioning assembly (3) includes a rotating disc (30) which is rotatably connected with the support (2), the right side of the rotating disc (30) is equipped with a first connecting rod (31), the right end of the first connecting rod (31) is equipped with a circular shell (32), the right side of the circular shell (32) is equipped with a first motor (33) through a mounting seat, the output shaft of the first motor (33) penetrates through the right side of the circular shell (32) and is coaxially connected with a driving bevel gear (34), the outer wall of the circular shell (32) is equipped with three rectangular tubes (35) which are arranged in an annular array, the outer wall of the circular shell (32) and the position inside the rectangular tube (35) is rotatably connected with a threaded rod (36), the bottom end of the threaded rod (36) is equipped with a driven bevel gear (360) which is in meshing transmission with the driving bevel gear (34), the outer wall of the threaded rod (36) is threadedly connected with a rectangular rod (37), the right side of the rectangular rod (37) and the position close to the outer end is equipped with an inner clamping plate (370), the outer end of the right side of the rectangular rod (37) is equipped with an outer reinforcing part (38), the left side of the support (2) is equipped with a driving assembly (4) for driving the rotating disc (30) to rotate.

2. A wind turbine blade pre-certification positioning device according to claim 1, characterised in that: The left side of the rectangular tube (35) is equipped with a second connecting rod (350), the left end of the second connecting rod (350) is fixedly connected with the right side of the rotating disc (30).

3. A wind turbine blade pre-certification positioning device according to claim 1, characterised in that: The outer reinforcing part (38) includes a fixed plate (380) which is fixedly connected with the right side of the rectangular rod (37), the top of the fixed plate (380) is equipped with a first hydraulic cylinder (381), the movable rod of the first hydraulic cylinder (381) penetrates through the top of the fixed plate (380) and is fixedly connected with an outer clamping plate (382).

4. A wind turbine blade pre-certification positioning device according to claim 3, characterised in that: The top of the inner clamping plate (370) is equipped with a first rubber pad (371), the bottom of the outer clamping plate (382) is equipped with a second rubber pad (383).

5. The wind turbine blade pre-certification positioning device of claim 1, wherein: The driving assembly (4) includes a mounting frame (40) which is fixedly connected with the left side of the support (2), the mounting frame (40) is equipped with a second motor (41), the output shaft of the second motor (41) is coaxially connected with a driving gear (42).

6. A wind turbine blade pre-certification positioning device according to claim 5, characterised in that: The driving assembly (4) further includes a rotating shaft (43) which is rotatably connected with the left side of the support (2), the right end of the rotating shaft (43) is coaxially connected with the left end of the rotating shaft of the rotating disc (30), the outer wall of the rotating shaft (43) is equipped with a driven gear (44) which is in meshing transmission with the driving gear (42).

7. The wind turbine blade pre-certification positioning device of claim 1, wherein: The top of the base (1) is provided with an auxiliary support (5) for supporting the blade end, the auxiliary support (5) comprises a second hydraulic cylinder (50) fixedly connected to the top of the base (1), the movable rod of the second hydraulic cylinder (50) is fixedly connected with a frame-shaped support plate (51), the front and back sides of the inner wall of the frame-shaped support plate (51) are rotatably connected with a bidirectional screw rod (52), the bidirectional screw rod (52) is threadedly connected with two U-shaped support plates (53), the left and right sides of the inner wall of the U-shaped support plate (53) are rotatably connected with a support roller (54).

8. A wind turbine blade pre-certification positioning device according to claim 7, characterised in that: The front end of the bidirectional screw rod (52) penetrates through the front side of the inner wall of the frame-shaped support plate (51) to the outside, and the front end of the bidirectional screw rod (52) is provided with a hand wheel (55).

9. The wind turbine blade pre-certification positioning device of claim 7, wherein: The auxiliary support (5) comprises two circular risers (56) symmetrically arranged front and back, the bottom of the circular riser (56) is bolted to the top of the base (1), the circular riser (56) is slidably connected with a positioning vertical rod (57), and the top end of the positioning vertical rod (57) is threadedly installed on the bottom of the frame-shaped support plate (51).

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