A wind turbine blade nut loosening detection device

Abstract

The present invention relates to the field of blade nut loosening detection technology, specifically, to a wind power generation blade nut loosening detection device. It includes a first fixed sleeve and a second fixed sleeve, one end of the first fixed sleeve and the second fixed sleeve are hinged by a hinge, the first fixed sleeve and the second fixed sleeve are respectively provided with a slide groove 1 and a slide groove 2 inside, and the slide groove 1 and the slide groove 2 are respectively slidably installed with a semicircular swivel 1 and a semicircular swivel 2 inside, and the front of the semicircular swivel 1 and the semicircular swivel 2 are provided with a plurality of plug holes distributed in a circumferential array. Through the connecting column, the semicircular swivel 1 and the semicircular swivel 2 can be plugged in and out of the arc groove, and the semicircular swivel 1 and the semicircular swivel 2 are continuously rotated, so that the mounting frame moves to the outside of each bolt, and the bolt is ultrasonically detected, so as to facilitate the staff to detect the bolts distributed in a circumferential array on the wind power generation blade.

Description

Technical Field

[0001] The invention relates to the technical field of blade nut loosening detection, and in particular to a wind power generation blade nut loosening detection device. Background Art

[0002] Wind power generation refers to the conversion of wind kinetic energy into electrical energy. It is a clean, harmless, renewable energy source. In the process of wind power generation, the blades on the wind turbine are driven by wind to rotate and generate electricity. Since it needs to be built outdoors and exposed to the natural environment for a long time, personnel are required to regularly inspect and maintain the blades, especially the installation position of the blades and the wind turbine. The nuts may become loose during long-term operation and need to be checked regularly.

[0003] Wind turbine blades are generally connected through flanges and fixed with a circle of bolts. Maintenance personnel need to climb from the inside of the wind turbine pole to the flange connection of the wind turbine blades and use a bolt loosening detection device to detect the bolts. Generally, an ultrasonic detection device is used to detect the looseness of the bolts. Ultrasonic detection is to place an ultrasonic transducer on the top of the bolt to release ultrasonic waves, which are received by an ultrasonic detector. The data is compared when the bolts are installed and tightened to see if there are any changes, and the looseness of the bolts is detected.

[0004] The connection of the wind turbine blade is designed to be cylindrical, and bolts distributed in a circle are installed along the circumference of the wind turbine blade. When inspectors need to inspect these multiple bolts distributed in a circular array, they face many difficulties, especially when the inspection object is the bolts located at the bottom of the circumference of the wind turbine blade. Since the inspectors are located at the top of the wind turbine blade, it is difficult to directly contact these bolts, which makes it impossible to carry out the inspection work in a conventional way. The difficulty of inspection is greatly increased. In view of this, there is an urgent need for a device for detecting the looseness of the nuts of wind turbine blades so that inspectors can successfully complete the inspection task. Summary of the invention

[0005] The purpose of the present invention is to provide a wind power generation blade nut loosening detection device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention aims to provide a wind power generation blade nut loosening detection device, comprising a first fixed sleeve and a second fixed sleeve, one end of the first fixed sleeve and the second fixed sleeve are hinged by a hinge, the other side of the first fixed sleeve and the second fixed sleeve are connected by a lock, the first fixed sleeve and the second fixed sleeve are respectively provided with a slide groove 1 and a slide groove 2 inside, the slide groove 1 and the slide groove 2 are respectively slidably installed with a semicircular swivel ring 1 and a semicircular swivel ring 2 inside, and the front of the semicircular swivel ring 1 and the semicircular swivel ring 2 are both provided with a plurality of plug holes distributed in a circumferential array;

[0007] The front of the first fixed sleeve frame is provided with an annular groove connected with the slide groove 1, the front of the annular groove is fixedly installed with a fixing plate, the front of the fixing plate is provided with an arc groove, the bottom of the fixing plate is provided with a connecting sleeve, the bottom of the connecting sleeve is against the outer surface of the semicircular rotating ring 1, and the interior of the connecting sleeve is provided with a telescopic component, which can be telescoped inside the connecting sleeve and plugged into the interior of the plug hole;

[0008] The back side of the semicircular swivel one passes through the slide groove one and extends to the back side of the first fixed sleeve. A detection component is fixedly installed on the back side of the semicircular swivel one, and the detection component can rotate with the semicircular swivel one.

[0009] As a further improvement of the present technical solution, the telescopic assembly includes a connecting column inserted into the inside of the connecting sleeve, a connecting ring is fixedly installed on the outer surface of the connecting column, an extrusion spring is sleeved on the outer surface of the connecting column, one end of the extrusion spring is installed on the front side of the connecting ring, and the other end of the extrusion spring is installed on the inner wall of the connecting sleeve, and a grip block is fixedly installed on the top of the connecting column passing through the connecting sleeve.

[0010] As a further improvement of the technical solution, the bottom of the connecting column is plugged into the inside of the plug-in hole, and the connecting sleeve can drive the connecting column and the semicircular rotating ring to rotate in the arc groove and the sliding groove.

[0011] As a further improvement of the present technical solution, the detection component includes a mounting frame fixedly mounted on the back side of a semicircular swivel, an annular frame is fixedly mounted on the inner wall of the mounting frame, a hole is provided on the outer surface of the annular frame, an adjustment component is slidably mounted inside the hole, an ultrasonic transducer is mounted inside the hole, and the adjustment component is used to perform telescopic adjustment on the ultrasonic transducer.

[0012] As a further improvement of the present technical solution, the adjustment component includes a return spring installed on the inner wall of the mounting frame, the outer surface of the return spring is provided with a rectangular frame, the front side of the rectangular frame is fixedly installed on the inner wall of the mounting frame, a movable plate is installed on the top of the return spring, the movable plate can move left and right inside the rectangular frame, an arc-shaped cleaning block is fixedly installed on the front side of the movable plate, two return springs and two rectangular frames are provided, the two return springs and the rectangular frames are symmetrically distributed on both sides of the annular frame, and one side of the movable plate passes through the rectangular frame and the annular frame and extends to the inside of the other rectangular frame.

[0013] As a further improvement of the technical solution, the ultrasonic transducer is fixedly mounted on the back of the movable plate, and the movable plate squeezes the reset spring to move, driving the arc-shaped cleaning block to move and retract together with the ultrasonic transducer.

[0014] As a further improvement of the present technical solution, a docking column is fixedly installed on the bottom of the semicircular swivel one, and a docking hole is opened on the top of the semicircular swivel two. The docking column is inserted into the inside of the docking hole to connect and fix the semicircular swivel one and the semicircular swivel two.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the wind turbine blade nut loosening detection device, the first fixing sleeve is clamped to the outer surface of the wind turbine blade, the second fixing sleeve is pulled and the docking column is inserted into the docking hole, and then the lock is closed to close the first fixing sleeve and the second fixing sleeve, so that the first fixing sleeve and the second fixing sleeve are located on the outside of the wind turbine blade bolt, and the ultrasonic transducer in the mounting frame is just clamped to the outside of the bolt, which is convenient for the installation of the fixing sleeve.

[0017] 2. In the wind turbine blade nut loosening detection device, the connecting column can be inserted and pulled out in the arc groove, and the semicircular swivel ring 1 and the semicircular swivel ring 2 are continuously rotated, so that the mounting frame moves to the outside of each bolt, and the bolts are ultrasonically detected, so as to facilitate the staff to detect the bolts distributed in a circular array on the wind turbine blade.

[0018] 3. In the wind turbine blade nut loosening detection device, while the mounting frame is moving, the arc-shaped cleaning block can clean the outer surface of the bolt, which facilitates the ultrasonic transducer to dock with the outer surface of the bolt and clean the dust on the outer surface of the bolt, making it easier to detect the looseness of the bolt and making the detection result more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the semicircular swivel 1 and the semicircular swivel 2 of the present invention;

[0021] Figure 3 It is a schematic diagram of the structure of the first fixed sleeve of the present invention;

[0022] Figure 4 It is a schematic diagram of the telescopic assembly structure of the present invention;

[0023] Figure 5 It is a schematic diagram of the plug hole structure of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the detection component of the present invention.

[0025] The meaning of each number in the figure is:

[0026] 1. First fixed sleeve; 11. Semicircular swivel 1; 12. Ring groove; 13. Fixed plate; 14. Arc groove;

[0027] 2. Second fixed sleeve; 21. Semicircular swivel second; 3. Plug-in hole;

[0028] 4. Connecting sleeve; 41. Telescopic assembly; 401. Connecting column; 402. Connecting ring; 403. Extrusion spring; 404. Grip block;

[0029] 5. Detection component; 501. Mounting frame; 502. Ring frame; 503. Ultrasonic transducer;

[0030] 6. Adjustment assembly; 601. Return spring; 602. Rectangular frame; 603. Moving plate; 604. Arc cleaning block;

[0031] 7. Docking column. DETAILED DESCRIPTION

[0032] The following will be combined with the accompanying drawings in 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.

[0033] Example

[0034] See also Figure 1-Figure 6As shown, the purpose of this embodiment is to provide a wind power blade nut loosening detection device, including a first fixed sleeve 1 and a second fixed sleeve 2, one end of the first fixed sleeve 1 and the second fixed sleeve 2 are hinged by a hinge, and the other side of the first fixed sleeve 1 and the second fixed sleeve 2 are connected by a lock, and the first fixed sleeve 1 and the second fixed sleeve 2 are respectively provided with a slide groove 1 and a slide groove 2 inside, and a semicircular swivel 1 11 and a semicircular swivel 21 are slidably installed inside the slide groove 1 and the slide groove 2 respectively, and the front of the semicircular swivel 1 11 and the semicircular swivel 21 are provided with a plurality of plug-in holes 3 distributed in a circular array; a docking column 7 is fixedly installed at the bottom of the semicircular swivel 11, and a docking hole is provided on the top of the semicircular swivel 21, and the docking column 7 is plugged into the inside of the docking hole to connect and fix the semicircular swivel 11 and the semicircular swivel 21.

[0035] The front of the first fixed sleeve frame 1 is provided with an annular groove 12 connected with the slide groove 1, a fixing plate 13 is fixedly installed on the front of the annular groove 12, an arc groove 14 is provided on the front of the fixing plate 13, a connecting sleeve 4 is installed at the bottom of the fixing plate 13, the bottom of the connecting sleeve 4 is against the outer surface of the semicircular rotating ring 11, and a telescopic component 41 is arranged inside the connecting sleeve 4, and the telescopic component 41 can be telescoped inside the connecting sleeve 4 and plugged into the inside of the plug hole 3;

[0036] The back side of the semicircular rotating ring 11 passes through the slide groove 1 and extends to the back side of the first fixed sleeve 1. The back side of the semicircular rotating ring 11 is fixedly installed with a detection component 5, and the detection component 5 can rotate along with the semicircular rotating ring 11.

[0037] Furthermore, one end of the first fixing sleeve 1 and the second fixing sleeve 2 are hinged, and the other end is fixed by a lock. When inspecting the wind turbine blade, the first fixing sleeve 1 and the second fixing sleeve 2 can be docked and fixed to the outside of the bolt to be inspected, and the semicircular swivel 11 and the semicircular swivel 21 slidably installed in the internal slide grooves 1 and 2 of the first fixing sleeve 1 and the second fixing sleeve 2 can be plugged into the docking hole through the docking column 7 for docking installation, so that the semicircular swivel 11 and the semicircular swivel 21 can be combined into a circular swivel and rotate in the slide grooves 1 and 2. In addition, a connecting sleeve 4 and a telescopic component 41 are provided on the front side of the first fixing sleeve 1, which can be plugged into the plug-in hole 3 opened on the front sides of the semicircular swivel 11 and the semicircular swivel 21 to drive the semicircular swivel 11 and the semicircular swivel 21 to rotate, and cooperate with the detection component 5 connected to the back side of the semicircular swivel 11 to detect the looseness of the bolts on the wind turbine blade.

[0038] First, consider how the telescopic assembly 41 in the connecting sleeve 4 connects and rotates the semicircular rotating ring 11. Figure 1-Figure 5, the specific structure of the telescopic component 41 is disclosed. The telescopic component 41 includes a connecting column 401 inserted into the inside of the connecting sleeve 4, a connecting ring 402 is fixedly installed on the outer surface of the connecting column 401, an extrusion spring 403 is sleeved on the outer surface of the connecting column 401, one end of the extrusion spring 403 is installed on the front side of the connecting ring 402, and the other end of the extrusion spring 403 is installed on the inner wall of the connecting sleeve 4, and the top of the connecting column 401 passes through the connecting sleeve 4 and is fixedly installed with a grip block 404.

[0039] The bottom of the connecting column 401 is inserted into the inside of the plug hole 3, and the connecting sleeve 4 can drive the connecting column 401 and the semicircular rotating ring 11 to rotate in the arc groove 14 and the sliding groove 1.

[0040] Furthermore, an annular groove 12 connected with the slide groove 1 is opened on the front of the first fixed sleeve frame 1, and a fixed plate 13 is fixedly installed on the top of the annular groove 12 to cover it, so that an arc groove 14 penetrating the sleeve annular groove 12 can be opened on the front of the fixed plate 13. The back of the connecting sleeve 4 arranged inside the annular groove 12 abuts against the outer surface of the semicircular rotating ring 11, and the front abuts against the back of the fixed plate 13. The connecting column 401 is inserted from the outside of the fixed plate 13, so that the connecting column 401 passes through the arc groove 14 and the connecting sleeve 4, and is connected to the plug-in hole 3 of the semicircular rotating ring 11, and a connecting ring 402 is fixedly installed on the outer surface of the connecting column 401, so that one end of the extrusion spring 403 is installed on the outer surface of the connecting ring 402, and the other end is installed on the inner wall of the connecting sleeve 4. The length of the arc groove 14 is the spacing of the bolt installation on the wind turbine blade. Hold the grip block 404 at the top of the connecting column 401. Pull the connecting column 401 in the arc groove 14, so that the connecting column 401 drives the semicircular rotating ring and the semicircular rotating ring 21 to rotate in the slide groove 1 and the slide groove 2, and rotates the detection component 5 on the back of the semicircular rotating ring 11 together, so that the clamping component can adjust the position and detect the looseness of the bolt. After completion, the connecting column 401 can be pulled forward so that the connecting column 401 retracts into the connecting sleeve 4. At this time, the connecting column 401 is no longer connected to the plug hole 3. The connecting column 401 is reset and pulled in the arc groove 14 to return to its original position, and the connecting column 401 is released. The connecting column 401 is squeezed by the squeezing force of the squeezing spring 403 and is plugged into the adjacent plug hole 3 on the left side of the plug hole 3. After the detection component 5 is detected, the connecting column 401 can be pulled again. This can be repeated to change the position of the detection component 5 and detect the looseness of the bolts distributed in a circle on the wind turbine blade.

[0041] It should be noted that the length of the arc groove 14 is the same as the adjacent spacing of the circumferentially distributed bolts, and the position of the plug hole 3 corresponds to the bolt one by one. Each time the connecting column 401 moves the semicircular swivel 11 and the semicircular swivel 21, one bolt can correspond.

[0042] After considering the problem of how the detection component 5 performs contact detection with the bolt, Figure 2-Figure 6 The detection component 5 includes a mounting frame 501 fixedly mounted on the back of a semicircular rotating ring 11, a ring frame 502 is fixedly mounted on the inner wall of the mounting frame 501, a hole is opened on the outer surface of the ring frame 502, an adjustment component 6 is slidably mounted inside the hole, an ultrasonic transducer 503 is mounted inside the hole, and the adjustment component 6 is used to telescopically adjust the ultrasonic transducer 503.

[0043] The adjustment component 6 includes a return spring 601 installed on the inner wall of the mounting frame 501, a rectangular frame 602 is provided on the outer surface of the return spring 601, the front of the rectangular frame 602 is fixedly installed on the inner wall of the mounting frame 501, a moving plate 603 is installed on the top of the return spring 601, the moving plate 603 can move left and right inside the rectangular frame 602, an arc-shaped cleaning block 604 is fixedly installed on the front of the moving plate 603, and two return springs 601 and rectangular frames 602 are provided. The two return springs 601 and the rectangular frame 602 are symmetrically distributed on both sides of the annular frame 502, and one side of the moving plate 603 penetrates the rectangular frame 602 and the annular frame 502 and extends to the inside of another rectangular frame 602. The ultrasonic transducer 503 is fixedly installed on the back of the moving plate 603, and the moving plate 603 squeezes the return spring 601 to move, driving the arc-shaped cleaning block 604 to move and retract together with the ultrasonic transducer 503.

[0044] Furthermore, the semicircular swivel 11 and the semicircular swivel 21 are both passed through the back of the first fixed sleeve 1 and the second fixed sleeve 2, so that the semicircular swivel 11 can be fixedly connected to the mounting frame 501, and the mounting frame 501 can rotate with the semicircular swivel 11 and the semicircular swivel 21, and the annular frame 502 is fixedly installed on the inner wall of the mounting frame 501, and a through hole is opened on the outer surface of the annular frame 502, so that the movable plate 603 can be inserted into the inside of the hole, and the two ends of the movable plate 603 are inserted into the two rectangular frames 602, and the two A hole is also provided on one side of the rectangular frame 602 close to the annular frame 502, so that the movable plate 603 can move forward and backward in the rectangular frame 602 and the annular frame 502. A horizontally distributed return spring 601 is installed inside the rectangular frame 602, one end of the return spring 601 is installed on the back of the semicircular swivel 11, and the other end is installed on the front of the movable plate 603, so that the movable plate 603 can be reset by the return spring 601 after being squeezed. An arc-shaped cleaning block 604 is installed on the back of the movable plate 603 in the rectangular frame 602, and a return spring 601 is installed on the back of the movable plate 603 in the annular frame 502. When the connecting column 401 rotates the semicircular rotating ring 11, the mounting frame 501 moves together, and the arc cleaning block 604 first contacts the bolt. Since the side of the arc cleaning block 604 is set to an arc shape, the arc cleaning block 604 can be squeezed and then retracted forward to squeeze the reset spring 601. As the arc cleaning block 604 moves, the dust on the outer surface of the bolt can be cleaned. When the bolt passes through the arc cleaning block 604, the ultrasonic transducer at this time shrinks together with the moving plate 603 to contact the bolt. When the connecting column 401 moves to the arc When the ultrasonic transducer 503 is at the other end of the groove 14, the ultrasonic transducer 503 is just in the middle of the outer surface of the bolt. The ultrasonic detector starts the ultrasonic transducer 503 to detect the looseness of the bolt. After completion, the connecting column 401 is reset, and the mounting frame 501 continues to be moved. The arc cleaning block 604 and the ultrasonic transducer 503 repeat the above operation, and continue to detect the looseness of the next bolt. In this way, the mounting frame 501 can be made to circle around the wind turbine blade, and the bolts in a circle can be detected one by one, so as to achieve the effect of detecting the looseness of the bolts, which can facilitate the staff to detect the bolts at the bottom of the wind turbine blade.

[0045] In summary, the working principle of this solution is as follows:

[0046] When detecting the looseness of the bolts of the wind turbine blade, the staff climbs to the bolt connection of the wind turbine blade, clamps the first fixing sleeve 1 to the outer surface of the wind turbine blade, pulls the second fixing sleeve 2 and inserts the docking column 7 into the docking hole, and then closes the lock to close the first fixing sleeve 1 and the second fixing sleeve 2, so that the first fixing sleeve 1 and the second fixing sleeve 2 are located on the outside of the bolts of the wind turbine blade, and the ultrasonic transducer 503 in the mounting frame 501 is just clamped to the outside of the bolts;

[0047] The staff pulls the connecting column 401 connected to the plug hole 3, driving the semicircular rotating ring 11 and the semicircular rotating ring 21 to rotate together, and the mounting frame 501 also rotates together, and the arc cleaning block 604 in the mounting frame 501 contacts the bolt, and the bolt presses the arc cleaning block 604 forward, so that the arc cleaning block 604 presses the movable plate 603, and the ultrasonic transducer 503 installed on the movable plate 603 also moves forward with the arc cleaning block 604, and the arc cleaning block 604 cleans the outer surface of the bolt. After the connecting column 401 moves to the other end of the arc groove 14, the ultrasonic transducer 503 is just on the outer surface of the bolt. The staff starts the ultrasonic detector, which can make the ultrasonic transducer 503 work to perform ultrasonic detection on the bolt. The staff can judge whether the bolt is loose by comparing the ultrasonic wave when the bolt is installed;

[0048] The connecting column 401 can be inserted and pulled out and moved in the arc groove 14, and the semicircular swivel ring 11 and the semicircular swivel ring 21 are continuously rotated, so that the mounting frame 501 moves to the outside of each bolt, and the bolts are ultrasonically tested, so as to facilitate the staff to detect the bolts distributed in a circular array on the wind turbine blades.

[0049] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A wind turbine blade nut loosening detection device, comprising a first fixing sleeve (1) and a second fixing sleeve (2), wherein one end of the first fixing sleeve (1) and the second fixing sleeve (2) are hingedly connected by a hinge, and the other side of the first fixing sleeve (1) and the second fixing sleeve (2) are connected by a lock, characterized in that: A first slide groove and a second slide groove are respectively provided inside the first fixed sleeve (1) and the second fixed sleeve (2), and a semicircular swivel ring (11) and a semicircular swivel ring (21) are slidably installed inside the first slide groove and the second slide groove, respectively. The front surfaces of the semicircular swivel ring (11) and the semicircular swivel ring (21) are provided with a plurality of plug holes (3) distributed in a circumferential array. The front of the first fixed sleeve frame (1) is provided with an annular groove (12) which is connected with the slide groove 1; the front of the annular groove (12) is fixedly mounted with a fixing plate (13); the front of the fixing plate (13) is provided with an arc groove (14); the bottom of the fixing plate (13) is provided with a connecting sleeve (4); the bottom of the connecting sleeve (4) is against the outer surface of the semicircular rotating ring 1 (11); the interior of the connecting sleeve (4) is provided with a telescopic component (41); the telescopic component (41) can be telescoped inside the connecting sleeve (4) and plugged into the interior of the plug hole (3); The back side of the semicircular rotating ring 1 (11) passes through the slide groove 1 and extends to the back side of the first fixed sleeve (1). A detection component (5) is fixedly mounted on the back side of the semicircular rotating ring 1 (11). The detection component (5) can rotate along with the semicircular rotating ring 1 (11).

2. The wind turbine blade nut loosening detection device according to claim 1, characterized in that: The telescopic assembly (41) comprises a connecting column (401) inserted into the interior of the connecting sleeve (4), a connecting ring (402) being fixedly mounted on the outer surface of the connecting column (401), a squeezing spring (403) being sleeved on the outer surface of the connecting column (401), one end of the squeezing spring (403) being mounted on the front side of the connecting ring (402), and the other end of the squeezing spring (403) being mounted on the inner wall of the connecting sleeve (4), and a gripping block (404) being fixedly mounted on the top of the connecting column (401) penetrating the connecting sleeve (4).

3. The wind turbine blade nut loosening detection device according to claim 2 is characterized in that: The bottom of the connecting column (401) is inserted into the interior of the plug hole (3), and the connecting sleeve (4) can drive the connecting column (401) and the semicircular rotating ring (11) to rotate in the arc groove (14) and the sliding groove (1).

4. The wind turbine blade nut loosening detection device according to claim 1, characterized in that: The detection component (5) comprises a mounting frame (501) fixedly mounted on the back of a semicircular rotating ring (11); an annular frame (502) is fixedly mounted on the inner wall of the mounting frame (501); a hole is provided on the outer surface of the annular frame (502); an adjustment component (6) is slidably mounted inside the hole; an ultrasonic transducer (503) is mounted inside the hole; and the adjustment component (6) is used to perform telescopic adjustment on the ultrasonic transducer (503).

5. The wind turbine blade nut loosening detection device according to claim 4, characterized in that: The adjustment component (6) comprises a return spring (601) mounted on the inner wall of the mounting frame (501); a rectangular frame (602) is arranged on the outer surface of the return spring (601); the front side of the rectangular frame (602) is fixedly mounted on the inner wall of the mounting frame (501); a movable plate (603) is mounted on the top of the return spring (601); the movable plate (603) can move left and right inside the rectangular frame (602); an arc-shaped cleaning block (604) is fixedly mounted on the front side of the movable plate (603); two return springs (601) and two rectangular frames (602) are arranged; the two return springs (601) and the rectangular frames (602) are symmetrically distributed on both sides of the annular frame (502); one side of the movable plate (603) penetrates the rectangular frame (602) and the annular frame (502) and extends to the inside of the other rectangular frame (602).

6. The wind turbine blade nut loosening detection device according to claim 4, characterized in that: The ultrasonic transducer (503) is fixedly mounted on the back of the movable plate (603), and the movable plate (603) squeezes the return spring (601) to move, thereby driving the arc-shaped cleaning block (604) to move and retract together with the ultrasonic transducer (503).

7. The wind turbine blade nut loosening detection device according to claim 1, characterized in that: A docking post (7) is fixedly mounted on the bottom of the semicircular swivel (11), and a docking hole is opened on the top of the semicircular swivel (21). The docking post (7) is inserted into the docking hole to connect and fix the semicircular swivel (11) and the semicircular swivel (21).

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