Phased array ultrasonic flaw detection device for high-strength bolts of wind turbine units

Abstract

This invention relates to the field of phased array ultrasonic flaw detection technology, specifically to a phased array ultrasonic flaw detection device for high-strength bolts in wind turbine generators. It includes a mounting plate, with a first and second roller rotatably mounted on the lower end of the mounting plate. An ultrasonic detection head is mounted on the mounting plate. A liquid storage device is fixed inside the second roller, and a cotton sleeve is fixedly fitted over the liquid storage device. Rotating components are rotatably mounted at the ends of the liquid storage device. The two rotating components are connected by multiple second airbags. Connecting strips for sealing drainage holes on one side of each second airbag are fixedly attached to the rotating components on both sides. This invention ensures sufficient couplant discharge, providing adequate couplant to the outside of the high-strength bolt, thereby improving the accuracy and efficiency of high-strength bolt flaw detection results.

Description

Technical Field

[0001] This invention relates to the field of phased array ultrasonic flaw detection technology, specifically to a phased array ultrasonic flaw detection device for high-strength bolts of wind turbine generators. Background Technology

[0002] In recent years, there have been frequent incidents of high-strength bolts breaking in wind turbines from the date of commissioning, which seriously affects the safe operation of wind turbines. If the high-strength bolts of the tower break, it will lead to increased tower vibration and even tower collapse. Therefore, it is necessary to strictly control the quality of high-strength bolts before the wind turbines leave the factory.

[0003] Because ultrasonic testing can rapidly and accurately detect surface and internal defects in metals, non-metals, ceramics, and composite materials, phased array ultrasonic testing is particularly suitable for inspecting high-strength bolts in wind turbines. However, before inspecting high-strength bolts, a coupling agent needs to be applied to their surface. Often, this is done manually, which can lead to uneven application, affecting the ultrasonic probe's detection of the bolts and causing inaccurate measurements. Furthermore, manual application of the coupling agent is inefficient, severely impacting the overall inspection efficiency for high-strength bolts. Summary of the Invention

[0004] The technical problem to be solved by the present invention is a phased array ultrasonic flaw detection device for high-strength bolts of wind turbine units, which can automatically apply coupling agent to high-strength bolts, uniformly apply coupling agent to high-strength bolts, and improve the flaw detection efficiency of high-strength bolts.

[0005] To achieve the above objectives, the technical solution provided by this invention is as follows:

[0006] A phased array ultrasonic flaw detection device for high-strength bolts of wind turbine units includes a mounting plate. A first roller and a second roller are rotatably mounted on the lower end of the mounting plate. An ultrasonic detection head is installed between the first roller and the second roller on the mounting plate. A liquid storage device is fixed inside the second roller. A cotton sleeve is fixed outside the liquid storage device and the liquid storage device is connected to the cotton sleeve. Rotating components are rotatably mounted at the ends of the liquid storage device. A driving device for driving the rotating components on the corresponding side is installed inside the end of the second roller. The two rotating components rotate in opposite directions and are connected by multiple second airbags. The cylinder wall of the second roller has drainage holes corresponding to the second airbags. A connecting strip is fixed on the second airbag for sealing the drainage holes on one side. The connecting strip is fixedly connected to the rotating components on both sides.

[0007] The rotating assembly includes a rotating sleeve rotatably disposed at the end of the liquid storage device. A first movable ring and a second movable ring are slidably disposed on the rotating sleeve along its axial direction. The first movable ring and the second movable ring are elastically connected to the rotating sleeve. The first movable ring and the second movable ring are connected through a first air bladder. The end of the second air bladder and the connecting strip are fixedly connected to the second movable ring. A channel connecting the first air bladder and the second air bladder is opened in the second movable ring.

[0008] Specifically, the rotating sleeve has multiple first sliding grooves, the length direction of which is parallel to the axial direction of the rotating sleeve. The first movable ring is slidably connected to the first sliding groove via a first slider. A first spring is fixed inside the first sliding groove, and the first spring abuts against the first slider on the first movable ring. The rotating sleeve also has multiple second sliding grooves, the length direction of which is parallel to the axial direction of the rotating sleeve. The second movable ring is slidably connected to the second sliding groove via a second slider. A second spring is fixed inside the second sliding groove, and the second spring abuts against the second slider on the second movable ring. The elastic coefficient of the second spring is less than that of the first spring.

[0009] Specifically, the liquid storage device includes a liquid storage cylinder, which is concentrically arranged with the second roller. The cylinder wall of the liquid storage cylinder has multiple through holes that communicate with the cotton sleeve. At both ends of the liquid storage cylinder, there are fixed rods and fixed tubes that are concentric with it. The fixed rods and fixed tubes are fixedly connected to the second roller, and the fixed tubes communicate with the liquid storage cylinder. The rotating sleeves of the rotating components on both sides are rotatably sleeved on the fixed rods and fixed tubes, respectively.

[0010] Specifically, the driving device includes a motor fixed at both ends inside the second drum, a gear fixed on the output shaft of the motor, and a gear ring fitted on the rotating sleeve to mesh with the gear.

[0011] Specifically, both the first and second rollers are rotatably connected to support plates at their ends, and the support plates are fixedly connected to the mounting plate. The first and second rollers are arranged in parallel.

[0012] Specifically, a connecting pipe concentric with the second roller end on one side of the fixed pipe is fixed, the connecting pipe is rotatably connected to the support plate on one side of the fixed pipe, and a sealing cap is installed on the connecting pipe.

[0013] Specifically, the connecting strip includes a steel wire rope, and a rubber sleeve is fitted on the outside of the steel wire rope.

[0014] Specifically, the plurality of second airbags are evenly distributed on the outside of the cotton cover. The second airbags are elongated, the first airbags are annular, and the first airbags are fitted onto the rotating cover.

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

[0016] This invention can effectively squeeze out the coupling agent adsorbed inside the cotton sleeve. During the process of applying coupling agent to high-strength bolts, it can ensure the amount of coupling agent discharged, so that there is a sufficient amount of coupling agent on the outside of the high-strength bolts. After the coupling agent is applied to the outside of the high-strength bolts, the first roller can spread the coupling agent evenly, so that the coupling agent is evenly applied to the high-strength bolts. This can improve the accuracy of the flaw detection results of high-strength bolts, and at the same time improve the efficiency of flaw detection of high-strength bolts. Attached Figure Description

[0017] Figure 1 This is a three-dimensional view of the present invention.

[0018] Figure 2 This is a cross-sectional view of the second roller.

[0019] Figure 3 for Figure 2 A magnified view of region A in the middle.

[0020] Figure 4 A three-dimensional view showing the connection and mating of the rotating assembly with the second airbag and connecting strip.

[0021] The names of the components in the attached diagram are:

[0022] 1. Mounting plate; 2. Ultrasonic detection head; 3. First roller; 4. Second roller; 5. Drain hole; 6. Liquid storage cylinder; 7. Through hole; 8. Fixing pipe; 9. Fixing rod; 10. Cotton sleeve; 11. Connecting pipe; 12. Sealing cap; 13. Support plate; 14. Rotating sleeve; 15. First movable ring; 16. First slide groove; 17. First spring; 18. First airbag; 19. Second movable ring; 20. Second slide groove; 21. Second spring; 22. Second airbag; 23. Connecting strip; 24. Gear ring; 25. Gear; 26. Motor. Detailed Implementation

[0023] like Figure 1-4 As shown, the phased array ultrasonic flaw detection device for high-strength bolts of wind turbine generators includes a mounting plate 1. A first roller 3 and a second roller 4 are rotatably mounted on the lower end of the mounting plate 1, and support plates 13 are rotatably connected to the ends of both the first roller 3 and the second roller 4. Support plates 13 are fixedly connected to the mounting plate 1. The first roller 3 and the second roller 4 are arranged in parallel. An ultrasonic detection head 2 is installed on the mounting plate 1 between the first roller 3 and the second roller 4. A liquid storage device is fixed inside the second roller 4.

[0024] The liquid storage device includes a liquid storage cylinder 6. The liquid storage cylinder 6 is concentrically arranged with the second roller 4. Multiple through holes 7 are formed in the cylinder wall of the liquid storage cylinder 6, and the through holes 7 communicate with the cotton sleeve 10. A fixing rod 9 and a fixing pipe 8, concentrically located, are fixed to both ends of the liquid storage cylinder 6. The fixing rod 9 and the fixing pipe 8 are fixedly connected to the second roller 4. The fixing pipe 8 communicates with the liquid storage cylinder 6. A connecting pipe 11, concentrically located, is fixed to the end of the second roller 4 on one side of the fixing pipe 8. The connecting pipe 11 is rotatably connected to a support plate 13 on one side of the connecting pipe 11. A sealing cap 12 is sealed and installed on the connecting pipe 11.

[0025] A cotton sleeve 10 is fixedly fitted on the outside of the liquid storage device, and the liquid storage device is connected to the cotton sleeve 10.

[0026] Rotating components are rotatably mounted at the ends of the liquid storage device. The two rotating components rotate in opposite directions, and the rotating sleeves 14 of the two rotating components are respectively rotatably mounted on the fixed rod 9 and the fixed tube 8. The two rotating components are connected by multiple second airbags 22, which are evenly distributed on the outside of the cotton sleeve 10. The second airbags 22 are elongated, and the cylinder wall of the second roller 4 has drainage holes 5 corresponding to the second airbags 22. A connecting strip 23 is fixed to the second airbag 22 to seal the drainage hole 5 on one side. The connecting strip 23 is fixedly connected to the rotating components on both sides. The connecting strip 23 includes a steel wire rope, and a rubber sleeve is fitted over the outside of the steel wire rope.

[0027] The rotating assembly includes a rotating sleeve 14 rotatably disposed at the end of the liquid storage device. A first movable ring 15 and a second movable ring 19 are slidably disposed on the rotating sleeve 14 along its axial direction. The first movable ring 15 and the second movable ring 19 are elastically connected to the rotating sleeve 14. The first movable ring 15 and the second movable ring 19 are connected by a first airbag 18. The first airbag 18 is annular and is sleeved on the rotating sleeve 14. The ends of the second airbag 22 and the connecting strip 23 are fixedly connected to the second movable ring 19. A channel connecting the first airbag 18 and the second airbag 22 is opened in the second movable ring 19.

[0028] The rotating sleeve 14 has multiple first sliding grooves 16. The length direction of the first sliding groove 16 is parallel to the axial direction of the rotating sleeve 14. The first movable ring 15 is slidably connected to the first sliding groove 16 via a first slider. A first spring 17 is fixed inside the first sliding groove 16, and the first spring 17 abuts against the first slider on the first movable ring 15. The rotating sleeve 14 has multiple second sliding grooves 20. The length direction of the second sliding groove 20 is parallel to the axial direction of the rotating sleeve 14. The second movable ring 19 is slidably connected to the second sliding groove 20 via a second slider. A second spring 21 is fixed inside the second sliding groove 20, and the second spring 21 abuts against the second slider on the second movable ring 19.

[0029] The elastic coefficient of the second spring 21 is less than that of the first spring 17.

[0030] The second roller 4 has a drive device inside its end for driving the rotating component on the corresponding side to rotate. The drive device includes a motor 26 fixed at both ends inside the second roller 4, a gear 25 fixed on the output shaft of the motor 26, and a gear ring 24 that meshes with the gear 25 is fitted and fixed on the rotating sleeve 14.

[0031] When it is necessary to apply coupling agent to the outside of the high-strength bolt, open the sealing cap 12 and pour the coupling agent into the connecting pipe 11. The coupling agent enters the reservoir 6 through the fixed pipe 8 and then enters the cotton sleeve 10 through the through hole 7, where the cotton sleeve 10 absorbs the coupling agent. When the cotton sleeve 10 is saturated with coupling agent and the reservoir 6, fixed pipe 8, and connecting pipe 11 are filled with coupling agent, close the sealing cap 12. During the coupling agent injection process, the rubber sleeve on the outside of the connecting strip 23 seals the drain hole 5 on the second roller 4 to prevent the coupling agent from prematurely draining to the outside of the second roller 4.

[0032] Then, the device is placed on the high-strength bolt to be tested. At this time, the second roller 4 and the first roller 3 come into contact with the high-strength bolt, causing the high-strength bolt to be close to the first roller 3 and the second roller 4 and rotate, causing the first roller 3 and the second roller 4 to move around the high-strength bolt.

[0033] Then, motor 26 is started, which drives rotating sleeve 14 to rotate via gear 25 and gear ring 24. Under the rotation control of the two motors 26, the rotating sleeves 14 on the left and right sides rotate in opposite directions. Rotating sleeve 14 drives the second movable ring 19, the first airbag 18, and the first movable ring 15 to rotate. Since the rotation directions of the second movable rings 19 on both sides are opposite, the second airbags 22 and the connecting strip 23 will be twisted together in a spiral shape. At this time, the connecting strip 23 loses its sealing effect on the drain hole 5. The multiple twisted second airbags 22 will first contact and squeeze the middle of the cotton sleeve 10. Then, as the second movable ring 19 continues to rotate, the multiple twisted second airbags 22 will squeeze the sides of the cotton sleeve 10. At this time, the multiple twisted second airbags 22 will wrap around and cover the outside of the cotton sleeve 10. During the process of the connecting strip 23 and the second airbags 22 wrapping around the outside of the cotton sleeve 10, the second movable rings 19 on both sides will move closer to each other under the pulling force of the connecting strip 23. Under the tension of the connecting strip 23, the second movable ring 19 moves towards the center of the liquid storage cylinder 6 along the length of the second slide groove 20. Simultaneously, the second movable ring 19 pushes the first airbag 18 and the first movable ring 15. The first movable ring 15 moves towards the center of the liquid storage cylinder 6 along the length of the first slide groove 16. During the movement of the first movable ring 15 and the second movable ring 19, because the elastic coefficient of the second spring 21 is less than that of the first spring 17, the speed at which the second movable ring 19 moves towards the center of the liquid storage cylinder 6 is greater than the speed at which the first movable ring 15 moves towards the center of the liquid storage cylinder 6. Therefore, during the movement of the first movable ring 15 and the second movable ring 19 on the same side towards the center of the liquid storage cylinder 6, the first airbag 18 is compressed by the first movable ring 15 and the second movable ring 19, and the gas inside the first airbag 18 is transferred to the second airbag 22 through the channel inside the second movable ring 19. After the second airbag 22 is inflated, it expands, further compressing the cotton sleeve 10. Simultaneously, as the first movable rings 15 on both sides move towards the center of the liquid storage cylinder 6, they squeeze both sides of the cotton sleeve 10. Under the wrapping and squeezing action of the second airbag 22, the expansion and squeezing action of the first movable rings 15, the coupling agent inside the cotton sleeve 10 can be fully squeezed out. The coupling agent squeezed out from the cotton sleeve 10 can then flow onto the high-strength bolt through the discharge hole 5. During the rotation and movement of the high-strength bolt, the coupling agent discharged from the discharge hole 5 is evenly coated on the outside of the high-strength bolt. After being rolled by the first roller 3 and the second roller 4, the coupling agent on the surface of the high-strength bolt is evenly spread. During the flaw detection of the high-strength bolt using the ultrasonic detection head 2, the clarity of the ultrasonic imaging can be ensured.

[0034] The output shaft of motor 26 will stop rotating after a set number of revolutions, thus preventing the rotating component from over-rotating and causing the connecting bar 23 and the second airbag 22 to break. After use, simply reverse the rotation of motor 26 to return the rotating component to its initial position.

[0035] 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, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A phased array ultrasonic flaw detection device for high-strength bolts of wind turbine generators, comprising a mounting plate (1), wherein a first roller (3) and a second roller (4) are rotatably mounted on the lower end of the mounting plate (1), and an ultrasonic detection head (2) is mounted on the mounting plate (1) between the first roller (3) and the second roller (4), characterized in that, The second roller (4) has a liquid storage device fixed inside. A cotton sleeve (10) is fixed on the outside of the liquid storage device. The liquid storage device is connected to the cotton sleeve (10). The ends of the liquid storage device are rotatably equipped with rotating components. The ends of the second roller (4) are equipped with a driving device for driving the rotating components on the corresponding side to rotate. The two rotating components rotate in opposite directions. The two rotating components are connected by multiple second airbags (22). The cylinder wall of the second roller (4) is provided with a drain hole (5) corresponding to the second airbag (22). A connecting strip (23) is fixed on the second airbag (22) for sealing the drain hole (5) on one side. The connecting strip (23) is fixedly connected to the rotating components on both sides. The rotating assembly includes a rotating sleeve (14) rotatably disposed at the end of the liquid storage device. A first movable ring (15) and a second movable ring (19) are slidably disposed on the rotating sleeve (14) along its axial direction. The first movable ring (15) and the second movable ring (19) are elastically connected to the rotating sleeve (14). The first movable ring (15) and the second movable ring (19) are connected through a first airbag (18). The ends of the second airbag (22) and the connecting strip (23) are fixedly connected to the second movable ring (19). A channel communicating with the first airbag (18) and the second airbag (22) is opened in the second movable ring (19). The rotating sleeve (14) is provided with a plurality of first sliding grooves (16), the length direction of the first sliding grooves (16) is parallel to the axial direction of the rotating sleeve (14), the first movable ring (15) is slidably connected to the first sliding grooves (16) through the first slider, the first spring (17) is fixed in the first sliding groove (16), the first spring (17) is tightly against the first slider on the first movable ring (15), the rotating sleeve (14) is provided with a plurality of second sliding grooves (20), the length direction of the second sliding grooves (20) is parallel to the axial direction of the rotating sleeve (14), the second movable ring (19) is slidably connected to the second sliding grooves (20) through the second slider, the second spring (21) is fixed in the second sliding grooves (20), the second spring (21) is tightly against the second slider on the second movable ring (19), the elastic coefficient of the second spring (21) is less than the elastic coefficient of the first spring (17).

2. The phased array ultrasonic flaw detection device for high-strength bolts of wind turbine units according to claim 1, characterized in that, The liquid storage device includes a liquid storage cylinder (6), which is concentrically arranged with the second roller (4). The cylinder wall of the liquid storage cylinder (6) is provided with multiple through holes (7), which are connected to the cotton sleeve (10). At both ends of the liquid storage cylinder (6), there are fixed rods (9) and fixed tubes (8) that are concentric with it. The fixed rods (9) and fixed tubes (8) are fixedly connected to the second roller (4), and the fixed tubes (8) are connected to the liquid storage cylinder (6). The rotating sleeves (14) of the rotating components on both sides are rotatably sleeved on the fixed rods (9) and fixed tubes (8).

3. The phased array ultrasonic flaw detection device for high-strength bolts of wind turbine units according to claim 1, characterized in that, The driving device includes a motor (26) fixed at both ends inside the second drum (4), a gear (25) fixed on the output shaft of the motor (26), and a gear ring (24) that meshes with the gear (25) is fitted on the rotating sleeve (14).

4. The phased array ultrasonic flaw detection device for high-strength bolts of wind turbine units according to claim 2, characterized in that, The first roller (3) and the second roller (4) are rotatably connected to support plates (13) at their ends. The support plates (13) are fixedly connected to the mounting plate (1). The first roller (3) and the second roller (4) are arranged in parallel.

5. The phased array ultrasonic flaw detection device for high-strength bolts of wind turbine units according to claim 4, characterized in that, The end of the second roller (4) on one side of the fixed pipe (8) is fixed with a connecting pipe (11) concentric with it. The connecting pipe (11) is rotatably connected to the support plate (13) on one side of it. A sealing cap (12) is installed on the connecting pipe (11).

6. The phased array ultrasonic flaw detection device for high-strength bolts of wind turbine units according to claim 1, characterized in that, The connecting strip (23) includes a steel wire rope, and a rubber sleeve is fitted on the outside of the steel wire rope.

7. The phased array ultrasonic flaw detection device for high-strength bolts of wind turbine units according to claim 1, characterized in that, The multiple second airbags (22) are evenly distributed on the outside of the cotton cover (10). The second airbags (22) are long strips, and the first airbags (18) are ring-shaped. The first airbags (18) are sleeved on the rotating cover (14).

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