A nondestructive testing device and method for wind turbine blades to prevent excessive extrusion

Abstract

The present invention discloses a nondestructive testing device for wind turbine blades that prevents excessive extrusion, which relates to the technical field of wind turbine blade testing, and includes a support platform, a blade body, a first electric slide, a second electric slide, and an ultrasonic flaw detector. The upper left end of the support platform is fixedly connected with a blade support frame, and the upper middle end of the support platform is provided with a blade body, the front and rear sides of the support platform are provided with a first electric slide, and the upper end of the first electric slide is provided with a first slider, and a support rod is installed at the upper end of the first slider. The nondestructive testing device and testing method for wind turbine blades that prevents excessive extrusion can facilitate the clamping of the circular tube at the left end of the blade body at multiple angles and multiple points by setting a multi-point clamping structure, so that the force on the blade body is more uniform, deformation, cracking, etc. caused by uneven force are avoided, and damage to the blade body is avoided, and the multi-point clamping is more stable and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine blade detection, and in particular to a nondestructive detection device and a detection method for wind turbine blades that can prevent excessive extrusion. Background Art

[0002] Wind turbine blades are the core components of wind turbines that convert natural wind energy into electricity for wind turbines. They are also the main basis for measuring the design and technical level of wind turbines. After production, wind turbine blades need to be tested to ensure the overall quality, which requires the use of testing equipment.

[0003] However, there are still some problems in the use of existing non-destructive testing equipment and methods for wind turbine blades to prevent excessive extrusion:

[0004] There is a wind turbine blade detection device with a Chinese patent application number CN202110190495.9. It includes a detection base, a limit mechanism, a lifting mechanism, a moving mechanism, a power mechanism and a clamping mechanism, wherein the limit mechanism is connected to the middle of the detection base, the lifting mechanism is connected to the detection base, the moving mechanism is threadedly connected to the lifting mechanism, the left and right ends of the moving mechanism are respectively connected to a power mechanism, and each power mechanism is fixedly connected to a clamping mechanism;

[0005] 1. The existing wind turbine blade inspection equipment cannot ensure that the blades are subjected to force at multiple angles when clamping the wind turbine blades. The blades are easily deformed or even cracked due to excessive clamping force and uneven force, and the reliability of the fixed structure is poor.

[0006] 2. The existing detection is inconvenient for loading and unloading of blades. During the loading and unloading process, bumps are prone to occur, resulting in damage or destruction of the blades. The low operating efficiency leads to relatively low overall detection efficiency. The clamping structure is also cumbersome to operate, and it is impossible to automatically release the clamping of the blades after the detection is completed, affecting the overall detection efficiency.

[0007] In view of the above problems, an innovative design is carried out based on the original non-destructive testing equipment and method for wind turbine blades to prevent excessive extrusion. Summary of the invention

[0008] The purpose of the present invention is to provide a non-destructive testing device and method for wind turbine blades that can prevent excessive extrusion, so as to solve the problems raised in the above background technology that the existing clamping is unstable and can easily cause damage to the blades due to excessive force, and the loading and unloading operations are cumbersome and difficult, and the overall detection efficiency is low.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a nondestructive testing device for wind turbine blades to prevent excessive extrusion, comprising a support platform, a blade body, a first electric slide, a second electric slide and an ultrasonic flaw detector:

[0010] The upper left end of the support platform is fixedly connected with a blade support frame, and the upper middle end of the support platform is provided with a blade body, the front and rear sides of the support platform are provided with a first electric slide, and the upper end of the first electric slide is provided with a first slider, and the upper end of the first slider is installed with a support rod;

[0011] The top end of the support rod is connected to a second electric slide, the lower end of the second electric slide is equipped with a second slider, and the lower end of the second slider is equipped with an ultrasonic flaw detector;

[0012] A movable support frame is passed through the middle of the support platform, and a movable roller array is installed at the lower end of the movable support frame;

[0013] A positioning roller is fixedly connected to the middle of the blade support frame, and a movable connecting rod is arranged inside the positioning roller, and a clamping plate is connected to the inner end of the movable connecting rod.

[0014] Preferably, the left end of the blade body extends into the interior of the positioning roller, and the outer wall of the left end of the blade body contacts the clamping plate. The clamping plate is designed in a fan-shaped structure, and the shape of the clamping plate is consistent with the outer wall of the left end of the blade body. The movable connecting rod is slidingly connected to the inner wall of the positioning roller, and the movable connecting rod and the clamping plate are distributed in a circular array with the center of the positioning roller as the axis.

[0015] By adopting the above technical scheme, the left end of the blade body can be clamped by cooperating with multiple sets of movable connecting rods and clamping plates. The position of the clamping plate can be synchronously adjusted by adjusting the movable connecting rod. Through multi-point clamping, the outer wall of the blade body can be uniformly stressed, thereby ensuring the clamping stability and avoiding cracking and damage of the blade body caused by excessive extrusion.

[0016] Preferably, the distal clamping plate end of the movable connecting rod passes through a limiting rod, and the limiting rod is fixedly connected to the movable connecting rod, movable grooves are provided on both sides of the positioning drum, and both ends of the limiting rod pass through the movable grooves, and both ends of the limiting rod are slidably connected to the movable grooves, and the positioning drum is symmetrically provided with positioning plates on the left and right sides, and the positioning plates are hollow in design, and the positioning plates are provided with a penetrating limiting groove in an annular array;

[0017] The limiting groove is designed in an arc shape, and the inner end of the limiting groove is farther away from the center of the positioning plate than the outer end. Both ends of the limiting rod penetrate into the limiting groove, and the limiting rod is slidably connected to the limiting groove.

[0018] By adopting the above technical solution, the limit rod can be positioned through the limit groove opened by the positioning plate. Since the movable groove limits the movable direction of the limit rod, the positioning plate can be rotated to drive the limit rod to move, and the distance between the clamping plate, the movable connecting rod and the limit rod and the center position of the positioning roller can be adjusted to facilitate clamping.

[0019] Preferably, the positioning roller is rotatably connected to a transmission gear ring on the outside, and connecting rods are fixed at both ends of the transmission gear ring, and the ends of the connecting rods are fixedly connected to the positioning plate, a positioning frame is fixed to the rear end of the left side of the support platform, and the front end of the positioning frame is slidably connected to a transmission rack, and the front end of the transmission rack is meshingly connected to the transmission gear ring.

[0020] By adopting the above technical solution, through the cooperation between the transmission gear ring and the transmission rack, the transmission gear ring and the positioning roller can be driven to move synchronously when the transmission rack is raised or lowered, thereby controlling the contact between the clamping plate and the blade body and controlling the clamping.

[0021] Preferably, a first reciprocating screw is passed through the front end of the transmission rack, and the transmission rack is threadedly connected to the first reciprocating screw, and the upper end of the first reciprocating screw is rotatably connected to the positioning frame, a first gear is passed through the lower end of the first reciprocating screw, and a first ratchet structure is connected inside the first gear, and the first ratchet structure is fixedly connected to the first reciprocating screw, and a first rack is fixed to the lower end of the left side of the rear support rod, and the first rack is meshingly connected to the first gear.

[0022] By adopting the above technical solution, through the setting of the first rack, the first rack can be driven to move synchronously when the support rod moves horizontally, and the first rack can be used to drive the first gear to rotate synchronously, and the first ratchet structure can control the first rack to move to the left. The first gear and the first ratchet structure can drive the first reciprocating screw to rotate synchronously to control the lifting of the transmission rack. When the first rack is reset to the right, the first gear rotates independently, and the first reciprocating screw does not rotate with it.

[0023] Preferably, the support platform is designed in a "C"-shaped structure, and the movable support frame is slidably connected to the support platform. A limiting groove is provided at the upper end of the movable support frame, and the limiting groove is consistent with the shape of the blade body, and the limiting groove is snap-connected with the blade body.

[0024] By adopting the above technical solution, the blade body can be locked and limited by the limiting groove design opened at the upper end of the movable support frame to prevent the blade body from sliding when placed, and the design of the movable support frame facilitates the loading and unloading of the blade body.

[0025] Preferably, a movable square rod is passed through the lower end of the rear side of the front support rod, and a positioning shaft is passed through the rear end of the movable square rod, a return spring is provided at the rear end inside the movable square rod, and the front and rear ends of the return spring are respectively fixedly connected to the inner wall of the movable square rod and the positioning shaft, a positioning plate is fixed to the front end of the left side of the movable support frame, and a positioning hole is opened at the front end of the positioning plate, and the positioning hole is engaged and connected with the positioning shaft.

[0026] By adopting the above technical solution, through the design of the reset spring, the positioning shaft inside the movable square rod can be pushed to move backward, and when the positioning shaft is engaged with the positioning hole, the movement of the support rod can drive the movable support rod frame to move horizontally synchronously, so that after the detection is completed, the blade body can be directly driven out of the clamping structure and unloaded.

[0027] Preferably, a second reciprocating screw is passed through the lower end of the front support rod, and the second reciprocating screw is rotatably connected to the support rod, and the rear end of the second reciprocating screw is threadedly connected to the movable square rod, a second gear is passed through the front end of the second reciprocating screw, and a second ratchet structure is connected inside the second gear, and the inner wall of the second ratchet structure is fixedly connected to the second reciprocating screw, and a second rack is fixed to the upper end of the left side of the support platform, and the second rack is meshingly connected to the second gear.

[0028] By adopting the above technical solution, through the cooperation of the second gear and the second rack, the second rack can be used to drive the second gear to rotate when the support rod slides to the left. Since the second gear and the second reciprocating screw are connected through the second ratchet structure, the second reciprocating screw can only be driven to rotate when the gear moves to the left. The rotation of the second reciprocating screw drives the movable square rod to move forward and backward, which can control the connection between the positioning shaft and the positioning hole, and control the synchronous movement of the support rod and the movable support frame as well as the separation between them.

[0029] Preferably, a method for detecting a nondestructive testing device for wind turbine blades to prevent excessive extrusion comprises the following steps:

[0030] Step 1: First, the blade body can be suspended and placed on the upper end of the movable support frame through the lifting equipment, and engaged with the limiting groove. The support rod and the second electric slide are driven to move synchronously through the cooperation of the first electric slide and the first slider. The reset spring is used to push the inner wall of the movable square rod to make the positioning shaft engage with the positioning hole opened on the positioning plate connected to the front end of the movable support frame, so that the support rod moves and drives the movable support frame to move synchronously for loading;

[0031] Step 2: When the support rod moves to the left, the second rack is first used to drive the second gear to rotate. When the support rod moves to the left, the second ratchet structure can drive the second reciprocating screw to rotate synchronously, and drive the movable square rod to move backward, contacting the positioning shaft and the positioning hole, and the movable support frame stops moving. At this time, the left end of the blade body penetrates into the clamping structure;

[0032] Step 3, when the support rod continues to move to the left, the first rack is driven to contact the first gear and drive it to rotate, and the first ratchet structure can drive the first reciprocating screw to rotate synchronously when the first rack moves to the left, and the first reciprocating screw is used to drive the transmission rack to move vertically, and the transmission rack is used to drive the transmission gear ring, the connecting rod, and the positioning plate to rotate synchronously, the positioning plate rotates to change the position of the limit groove, and the limit rod is used to cooperate with the limit groove. The limit rod moves inside the limit groove to change the distance to the center of the positioning roller, and the clamping plate is driven by the movable connecting rod to contact and clamp the outer wall of the blade body;

[0033] Step 4. After the blade body is fixed, the first electric slide uses the first slider to drive the support rod and the second electric slide to move to the right again for detection. During the detection, the front and rear positions of the ultrasonic flaw detector can be adjusted through the cooperation of the second electric slide and the second slider to ensure the accuracy of the detection.

[0034] Compared with the prior art, the beneficial effects of the present invention are: the non-destructive testing equipment and method for wind turbine blades that prevent over-extrusion, by setting a multi-point clamping structure, can facilitate multi-angle and multi-point clamping of the circular tube at the left end of the blade body, so that the force on the blade body is more uniform, avoiding deformation, cracking, etc. caused by uneven force, avoiding damage to the blade body, and multi-point clamping is more stable and reliable.

[0035] 1. By providing a linkage structure, when the support rod moves to the left after the detection is completed, the first rack, the first gear and the first ratchet structure cooperate to provide rotational power for the clamping structure, thereby completing the position adjustment of the holding plate and releasing the clamping and fixing of the blade body. The operation is simple, and after the unloading is completed, the blade body can be loaded and the blade can be further clamped synchronously;

[0036] 2. By setting up a material discharge structure and utilizing the coordination of structures such as gear racks, after the inspection is completed, the support rod of the inspection structure can be used to drive the movable support frame to move synchronously, thereby driving the blade body to separate from the clamping structure and move to the edge, making it easier to take and place the blade body and improving the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a left side structural schematic diagram of the present invention;

[0038] Figure 2 It is a schematic diagram of the structure of the right side of the present invention;

[0039] Figure 3 It is a schematic diagram of the cross-sectional structure of the movable square rod of the present invention;

[0040] Figure 4 It is a schematic diagram of the structure of the movable support frame and the movable roller of the present invention;

[0041] Figure 5 It is a schematic diagram of the structure of the first reciprocating screw rod and the transmission rack of the present invention;

[0042] Figure 6 It is a schematic diagram of the structure of the movable connecting rod and the clamping plate of the present invention;

[0043] Figure 7 It is a schematic diagram of the transmission gear ring and connecting rod structure of the present invention;

[0044] Figure 8 This is a schematic diagram of the positioning plate and positioning hole structure of the present invention;

[0045] Fig. 9 It is a schematic diagram of the structure of the first gear and the first ratchet of the present invention.

[0046] In the figure: 1. support platform; 2. blade support frame; 3. blade body; 4. first electric slide; 5. first slider; 6. support rod; 7. second electric slide; 8. second slider; 9. ultrasonic flaw detector; 10. movable support frame; 11. limiting groove; 12. moving roller; 13. positioning roller; 14. movable connecting rod; 15. clamping plate; 16. limiting rod; 17. positioning plate; 18. limiting groove; 19. transmission gear ring; 20. connecting rod; 21. positioning frame; 22. transmission rack; 23. first reciprocating screw; 24. first gear; 25. first ratchet structure; 26. first rack; 27. positioning plate; 28. positioning hole; 29. ​​movable square rod; 30. positioning shaft; 31. reset spring; 32. second reciprocating screw; 33. second gear; 34. movable groove; 35. second rack. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] See also Figure 1-9The present invention provides a technical solution: a nondestructive testing device for wind turbine blades that prevents excessive extrusion, comprising a supporting platform 1, a blade body 3, a first electric slide 4, a second electric slide 7 and an ultrasonic flaw detector 9, wherein a blade supporting frame 2 is fixedly connected to the upper left end of the supporting platform 1, and a blade body 3 is arranged at the upper middle end of the supporting platform 1, a first electric slide 4 is arranged on both front and rear sides of the supporting platform 1, and a first slider 5 is arranged on the upper end of the first electric slide 4, and a supporting rod 6 is installed on the upper end of the first slider 5; a second electric slide 7 is connected to the top of the supporting rod 6, and a second slider 8 is installed on the lower end of the second electric slide 7, and an ultrasonic flaw detector 9 is installed on the lower end of the second slider 8; through the cooperation between the first electric slide 4, the first slider 5 and the supporting rod 6, the second electric slide 7, the second slider 8 and the ultrasonic flaw detector 9 can be driven to move horizontally synchronously, and the second electric slide 7 can drive the second slider 8 and the ultrasonic flaw detector 9 to move forward and backward, so that the surface of the blade body 3 can be fully covered and tested, thereby improving the accuracy of the test, and the power cord of the device is connected to the external power grid before use.

[0049] A movable support frame 10 runs through the middle of the support platform 1, and a movable roller 12 is installed in an array at the lower end of the movable support frame 10; the support platform 1 is designed in a "C"-shaped structure, and the movable support frame 10 is slidably connected to the support platform 1, and a limiting groove 11 is provided at the upper end of the movable support frame 10, and the limiting groove 11 is consistent with the shape of the blade body 3, and the limiting groove 11 is connected with the blade body 3 by snapping; a movable square rod 29 runs through the lower end of the rear side of the front end support rod 6, and a positioning shaft 30 runs through the rear end of the movable square rod 29, a reset spring 31 is arranged at the rear end of the movable square rod 29, and the front and rear ends of the reset spring 31 are respectively fixedly connected to the inner wall of the movable square rod 29 and the positioning shaft 30, and the movable A positioning plate 27 is fixed to the front end of the left side of the support frame 10, and a positioning hole 28 is opened at the front end of the positioning plate 27, and the positioning hole 28 is engaged with the positioning shaft 30; a second reciprocating screw 32 is passed through the lower end of the front support rod 6, and the second reciprocating screw 32 is rotatably connected to the support rod 6, and the rear end of the second reciprocating screw 32 is threadedly connected to the movable square rod 29, a second gear 33 is passed through the front end of the second reciprocating screw 32, and a second ratchet structure is connected inside the second gear 33, and the inner wall of the second ratchet structure is fixedly connected to the second reciprocating screw 32, a second rack 35 is fixed to the upper end of the left side of the support platform 1, and the second rack 35 is meshed with the second gear 33; a reset spring 31 can be used to The positioning shaft 30 is pushed to move backward and engage with the positioning hole 28 provided in the positioning plate 27 connected to the front end of the support rod 6, so that when the support rod 6 moves horizontally left and right, it can drive the movable support frame 10 to move synchronously, which is convenient for loading the blade body 3. The limiting groove 11 provided at the upper end of the blade body 3 can be used to prevent the blade body 3 from sliding and deflecting. When the support rod 6 moves to the left, it drives the movable support frame 10 to move, and after the second gear 33 and the second rack 35 are released, the second gear 33 is driven to rotate synchronously with the second ratchet structure, and the second ratchet structure is used to drive the second reciprocating screw rod 32 to rotate synchronously, and the second reciprocating screw rod 3 2 rotation can drive the movable square rod 29 to move forward, and then contact the positioning hole 28 and the positioning shaft 30, the movable support frame 10 stops moving to complete the unloading, at this time, the left end of the blade body 3 penetrates into the inside of the blade support frame 2, due to the design of the second ratchet structure, when the support rod 6 drives the second gear 33 to move rightward, it will not drive the second reciprocating screw 32 to rotate, and when the support rod 6 is reset to the left again after the detection of the blade body 3 is completed, it drives the second reciprocating screw 32 to rotate again, so that the movable square rod 29 moves backward, and the positioning shaft 30 is engaged with the positioning hole 28 again, so that the support rod 6 moves to the right to unload the blade body 3 after the detection is completed, thereby improving the convenience of operation.

[0050] A positioning roller 13 is fixedly connected to the middle of the blade support frame 2, and a movable connecting rod 14 is arranged inside the positioning roller 13, and a clamping plate 15 is connected to the inner end of the movable connecting rod 14; the left end of the blade body 3 extends to the inside of the positioning roller 13, and the outer wall of the left end of the blade body 3 contacts the clamping plate 15, the clamping plate 15 is designed in a fan-shaped structure, and the shape of the clamping plate 15 and the outer wall of the left end of the blade body 3 are consistent, the movable connecting rod 14 is slidably connected to the inner wall of the positioning roller 13, and the movable connecting rod 14 and the clamping plate 15 are both connected to the positioning roller 13 is distributed in an annular array with an axis at the center; the end of the movable connecting rod 14 far from the clamping plate 15 penetrates the limiting rod 16, and the limiting rod 16 is fixedly connected to the movable connecting rod 14, and movable grooves 34 are opened on both sides of the positioning roller 13, and the two ends of the limiting rod 16 penetrate the movable grooves 34, and the two ends of the limiting rod 16 are slidably connected to the movable grooves 34, and the positioning plates 17 are symmetrically arranged on the left and right sides of the positioning roller 13, and the positioning plates 17 are hollow in design, and the internal annular array of the positioning plates 17 is opened with penetrating limiting grooves 18; the limiting grooves 18 are arc-shaped The inner end of the limit groove 18 is larger than the outer end from the center of the positioning plate 17, and the two ends of the limit rod 16 penetrate into the limit groove 18, and the limit rod 16 is slidably connected to the limit groove 18; the positioning roller 13 is externally rotatably connected with a transmission gear ring 19, and connecting rods 20 are fixed at both ends of the transmission gear ring 19, and the end of the connecting rod 20 is fixedly connected to the positioning plate 17, a positioning frame 21 is fixed at the rear end of the left side of the support platform 1, and a transmission rack 22 is slidably connected to the front end of the positioning frame 21, and the front end of the transmission rack 22 meshes with the transmission gear ring 19. The front end of the transmission rack 22 is penetrated by a first reciprocating screw rod 23, and the transmission rack 22 is threadedly connected to the first reciprocating screw rod 23, and the upper end of the first reciprocating screw rod 23 is rotatably connected to the positioning frame 21, and the lower end of the first reciprocating screw rod 23 is penetrated by a first gear 24, and the first gear 24 is internally connected to a first ratchet structure 25, and the first ratchet structure 25 is internally fixedly connected to the first reciprocating screw rod 23, and the lower end of the left side of the rear support rod 6 is fixed with a first rack 26, and the first rack 26 is meshed with the first gear 24;When the movable square rod 29 moves forward, the positioning shaft 30 is released from the positioning hole 28, and the support rod 6 is driven by the first electric slide 4 to move leftward, and the first rack 26 contacts the first gear 24, the first rack 26 drives the first gear 24 to rotate, and the first ratchet structure 25 drives the first reciprocating screw 23 to rotate synchronously, and the first reciprocating screw 23 can drive the transmission rack 22 to move downward, and the transmission rack 22 drives the transmission gear ring 19, the connecting rod 20, and the positioning plate 17 to rotate synchronously. Because the rotation of the positioning plate 17 changes the position of the limit slot 18, the rotation of the limit slot 18 will drive the limit rod 16 to move synchronously, and because the movable slot 34 limits the activity trajectory of the limit rod 16, the limit slot 18 rotates the limit rod 16 and the positioning roller 13 center distance becomes smaller, and the clamping plate 15 is moved toward the blade body 3 by the movable connecting rod 14, so that multiple groups of clamping plates 15 can clamp the tubular part on the left side of the blade body 3 at the same time. The multi-point clamping ensures the uniformity of the clamping force and can improve the stability of the clamping. The synchronous control operation is simple during feeding, and the detection efficiency is improved. With the cooperation of the first ratchet structure 25, after the detection is completed, when the support rod 6 drives the first rack 26 to move to the left again, the first reciprocating screw 23 drives the transmission rack 22 to move in the opposite direction, and the transmission gear ring 19 rotates in the opposite direction, thereby releasing the fixation of the blade body 3, and the first ratchet structure 25 can ensure that when the first rack 26 moves to the right, the first gear 24 will not drive the first reciprocating screw 23 to rotate. ;

[0051] A method for detecting a nondestructive testing device for wind turbine blades to prevent excessive extrusion, comprising the following steps:

[0052] Step 1: First, the blade body 3 can be suspended and placed on the upper end of the movable support frame 10 through the lifting equipment, and engaged with the limiting groove 11. The support rod 6 and the second electric slide 7 are driven to move synchronously through the cooperation of the first electric slide 4 and the first slider 5. The reset spring 31 is used to push the inner wall of the movable square rod 29 to make the positioning shaft 30 engage with the positioning hole 28 opened on the positioning plate 27 connected to the front end of the movable support frame 10, so that the support rod 6 moves to drive the movable support frame 10 to move synchronously for loading;

[0053] Step 2: When the support rod 6 moves to the left, the second rack 35 is first used to drive the second gear 33 to rotate. When the support rod 6 moves to the left, the second ratchet structure can drive the second reciprocating screw 32 to rotate synchronously, and drive the movable square rod 29 to move backward, contacting the positioning shaft 30 and the positioning hole 28, and the movable support frame 10 stops moving. At this time, the left end of the blade body 3 penetrates into the clamping structure;

[0054] Step 3, when the support rod 6 continues to move to the left, it drives the first rack 26 to contact with the first gear 24 and drives it to rotate, and the first ratchet structure 25 can drive the first reciprocating screw 23 to rotate synchronously when the first rack 26 moves to the left, and use the first reciprocating screw 23 to drive the transmission rack 22 to move vertically, and use the transmission rack 22 to drive the transmission gear ring 19, the connecting rod 20, and the positioning plate 17 to rotate synchronously, and the positioning plate 17 rotates to change the position of the limiting groove 18, and the limiting rod 16 cooperates with the limiting groove 18, and the limiting rod 16 moves inside the limiting groove 18 to change the distance to the center of the positioning roller 13, and the clamping plate 15 is driven by the movable connecting rod 14 to contact and clamp the outer wall of the blade body 3;

[0055] Step 4. After the blade body 3 is fixed, the first electric slide 4 uses the first slider 5 to drive the support rod 6 and the second electric slide 7 to move to the right again for detection. During the detection, the front and rear positions of the ultrasonic flaw detector 9 can be adjusted through the cooperation of the second electric slide 7 and the second slider 8 to ensure the accuracy of the detection.

[0056] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. Although the embodiments of the present invention have been shown and described, it is understood by ordinary technicians in the field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A non-destructive testing device for wind turbine blades to prevent excessive extrusion, comprising a support platform (1), a blade body (3), a first electric slide (4), a second electric slide (7) and an ultrasonic flaw detector (9), characterized in that: The upper left end of the support platform (1) is fixedly connected to a blade support frame (2), and the upper middle end of the support platform (1) is provided with a blade body (3), the front and rear sides of the support platform (1) are provided with a first electric slide (4), the upper end of the first electric slide (4) is provided with a first slider (5), and the upper end of the first slider (5) is installed with a support rod (6); The top end of the support rod (6) is connected to a second electric slide (7), the lower end of the second electric slide (7) is equipped with a second slider (8), and the lower end of the second slider (8) is equipped with an ultrasonic flaw detector (9); A movable support frame (10) is passed through the middle of the support platform (1), and movable rollers (12) are installed in an array at the lower end of the movable support frame (10); A positioning roller (13) is fixedly connected to the middle of the blade support frame (2), a movable connecting rod (14) is arranged inside the positioning roller (13), and a clamping plate (15) is connected to the inner end of the movable connecting rod (14); The left side end of the blade body (3) extends into the interior of the positioning roller (13), and the outer wall of the left side end of the blade body (3) contacts the clamping plate (15), the clamping plate (15) is designed in a fan-shaped structure, and the shape of the clamping plate (15) and the outer wall of the left side end of the blade body (3) are consistent, the movable connecting rod (14) is slidably connected to the inner wall of the positioning roller (13), and the movable connecting rod (14) and the clamping plate (15) are both distributed in a ring array with the center of the positioning roller (13) as the axis; The end of the movable connecting rod (14) far from the clamping plate (15) passes through the limiting rod (16), and the limiting rod (16) is fixedly connected to the movable connecting rod (14); movable grooves (34) are provided on both sides of the positioning roller (13), and both ends of the limiting rod (16) pass through the movable grooves (34), and both ends of the limiting rod (16) are slidably connected to the movable grooves (34); the positioning roller (13) is symmetrically provided with positioning plates (17) on the left and right sides, and the positioning plates (17) are hollow in design, and the positioning plates (17) are provided with limiting grooves (18) penetrating therein in an annular array; The limiting groove (18) is designed in an arc shape, and the inner end of the limiting groove (18) is farther from the center of the positioning plate (17) than the outer end, and both ends of the limiting rod (16) penetrate into the limiting groove (18), and the limiting rod (16) is slidably connected to the limiting groove (18); The support platform (1) is designed in a "C"-shaped structure, and the movable support frame (10) is slidably connected to the support platform (1), a limiting groove (11) is provided at the upper end of the movable support frame (10), and the limiting groove (11) matches the shape of the blade body (3), and the limiting groove (11) is snap-fitted and connected to the blade body (3).

2. The nondestructive testing device for wind turbine blades to prevent over-extrusion according to claim 1 is characterized in that: The positioning roller (13) is externally rotatably connected to a transmission gear ring (19), and connecting rods (20) are fixed at both ends of the transmission gear ring (19), and the ends of the connecting rods (20) are fixedly connected to the positioning plate (17). A positioning frame (21) is fixed at the rear end of the left side of the support platform (1), and a transmission rack (22) is slidably connected to the front end of the positioning frame (21), and the front end of the transmission rack (22) is meshedly connected to the transmission gear ring (19).

3. The nondestructive testing device for wind turbine blades to prevent over-extrusion according to claim 2 is characterized in that: A first reciprocating screw rod (23) is passed through the front end of the transmission rack (22), and the transmission rack (22) is threadedly connected to the first reciprocating screw rod (23), and the upper end of the first reciprocating screw rod (23) is rotatably connected to the positioning frame (21), a first gear (24) is passed through the lower end of the first reciprocating screw rod (23), and a first ratchet structure (25) is connected inside the first gear (24), and the first ratchet structure (25) is fixedly connected to the first reciprocating screw rod (23), and a first rack (26) is fixed to the lower left end of the rear support rod (6), and the first rack (26) is meshingly connected to the first gear (24).

4. The nondestructive testing device for wind turbine blades to prevent over-extrusion according to claim 3 is characterized in that: A movable square rod (29) is passed through the lower rear end of the front support rod (6), and a positioning shaft (30) is passed through the rear end of the movable square rod (29). A return spring (31) is provided at the rear end of the movable square rod (29), and the front and rear ends of the return spring (31) are respectively fixedly connected to the inner wall of the movable square rod (29) and the positioning shaft (30). A positioning plate (27) is fixed to the front end of the left side of the movable support frame (10), and a positioning hole (28) is provided at the front end of the positioning plate (27), and the positioning hole (28) is engaged and connected with the positioning shaft (30).

5. The nondestructive testing device for wind turbine blades to prevent over-extrusion according to claim 4 is characterized in that: A second reciprocating screw (32) is passed through the lower end of the front support rod (6), and the second reciprocating screw (32) is rotatably connected to the support rod (6), and the rear end of the second reciprocating screw (32) is threadedly connected to the movable square rod (29), a second gear (33) is passed through the front end of the second reciprocating screw (32), and a second ratchet structure is connected inside the second gear (33), and the inner wall of the second ratchet structure is fixedly connected to the second reciprocating screw (32), and a second rack (35) is fixed to the upper end of the left side of the support platform (1), and the second rack (35) is meshingly connected to the second gear (33).

6. The detection method of the wind turbine blade nondestructive testing device for preventing excessive extrusion according to claim 5 comprises the following steps: Step 1: First, the blade body (3) can be suspended and placed on the upper end of the movable support frame (10) by means of a lifting device, and engaged with the limiting groove (11), and the support rod (6) and the second electric slide (7) can be driven to move synchronously by the cooperation of the first electric slide (4) and the first sliding block (5), and the inner wall of the movable square rod (29) can be pushed by the return spring (31) to make the positioning shaft (30) engage with the positioning hole (28) provided on the positioning plate (27) connected to the front end of the movable support frame (10), so that the support rod (6) moves to drive the movable support frame (10) to move synchronously for loading; Step 2: When the support rod (6) moves to the left, the second rack (35) is first used to drive the second gear (33) to rotate. When the support rod (6) moves to the left, the second ratchet structure can drive the second reciprocating screw (32) to rotate synchronously, and drive the movable square rod (29) to move backward, contacting the positioning shaft (30) and the positioning hole (28) to engage, and the movable support frame (10) stops moving. At this time, the left end of the blade body (3) penetrates into the inside of the clamping structure; Step 3: When the support rod (6) continues to move to the left, it drives the first rack (26) to contact the first gear (24) and drive it to rotate. When the first rack (26) moves to the left, the first ratchet structure (25) can drive the first reciprocating screw (23) to rotate synchronously, and use the first reciprocating screw (23) to drive the transmission rack (22) to move vertically. Use the transmission rack (22) to drive the transmission gear ring (19), the connecting rod (20), and the positioning plate (17) to rotate synchronously. The positioning plate (17) rotates to change the position of the limiting groove (18). By using the cooperation between the limiting rod (16) and the limiting groove (18), the limiting rod (16) moves inside the limiting groove (18) to change the distance to the center of the positioning roller (13). The clamping plate (15) contacts the outer wall of the blade body (3) and clamps it through the movable connecting rod (14). Step 4: After the blade body (3) is fixed, the first electric slide (4) uses the first slider (5) to drive the support rod (6) and the second electric slide (7) to move rightward again for testing. During the testing, the front and rear positions of the ultrasonic flaw detector (9) can be adjusted by the cooperation of the second electric slide (7) and the second slider (8) to ensure the accuracy of the testing.

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