Wind driven generator blade inspection device

Abstract

The utility model discloses a wind driven generator blade inspection device which comprises two semicircular lifting frames which are in butt joint with each other and are arranged on the periphery of a tower body in a sleeving mode, and each lifting frame is provided with at least two walking devices used for walking on the surface of the tower body in a guiding mode and at least two lifting lugs used for lifting. Wherein the outer side of one lifting frame is provided with a telescopic arm arranged in the radial direction, the tail end of the telescopic arm is provided with a maintenance frame with a blade avoiding structure, and the maintenance frame is provided with a maintenance camera capable of moving around the blade along a specific route. And a maintenance camera is arranged on the base. The unmanned operation platform is adopted, the structure of the device can be greatly simplified, the lifting weight of the device is reduced, the manufacturing cost and the use cost of the device are greatly reduced, field installation is rapid and convenient, and the inspection process is safer and faster.

Description

Technical Field

[0001] The invention belongs to the technical field of wind power equipment, and in particular relates to a wind turbine blade inspection device. Background Art

[0002] When the wind turbine is running for a long time, the blades of the wind turbine will be eroded by the environment and even damaged. Therefore, the blades of the wind turbine need to be inspected and repaired regularly, and inspection and repair necessarily require a maintenance platform.

[0003] The patent with publication number CN207161274U discloses a wind turbine blade maintenance platform device, and its practical application is as follows: Figure 6 As shown. It can be seen that when using this type of device, maintenance personnel need to stand on the working platform. On the one hand, the structure of the entire device will be more complicated and bulky in order to meet safety requirements, which is not conducive to transportation and early installation, and has certain operating difficulties. On the other hand, maintenance personnel have to stand on the platform during the entire inspection process, which is dangerous, and long-term standing is more prone to fatigue. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a wind turbine blade inspection device which has an ingenious structure and is therefore more lightweight and easy to operate, and can achieve the purpose of unmanned high-altitude inspection.

[0005] In order to solve the problems of the prior art, the present invention discloses a wind turbine blade inspection device, comprising two semicircular lifting frames that are butt-jointed with each other and sleeved on the outer periphery of a tower body, the lifting frames being provided with at least two walking devices for guiding walking on the surface of the tower body and at least two lifting ears for lifting; a telescopic arm arranged radially is provided on the outer side of one of the lifting frames, a maintenance frame with a blade avoidance structure is provided at the end of the telescopic arm, and a maintenance camera that can move around the blade along a predetermined route is provided on the maintenance frame.

[0006] Furthermore, the walking device includes two swing arms which are rotatably installed one up and one down, rollers are installed at the ends of the swing arms, and an elastic element is connected between the two swing arms to make the two swing arms have a tendency to swing inwards.

[0007] Furthermore, the elastic element is a leaf spring, an end of which is pivotally connected to the swing arm.

[0008] Furthermore, the inspection frame is provided with a driving device for driving the inspection camera to perform circular motion.

[0009] Furthermore, the driving device includes an annular track, a pulley, a driving motor, a slider and a belt;

[0010] The two ends of the annular track are semicircular tracks, and the middle is a straight track. The slider is slidably installed on the annular track, and the inspection camera is installed on the slider;

[0011] The pulleys are respectively installed at the two ends of the maintenance frame and are concentrically arranged with the two ends of the annular track. The belt is sleeved on the two pulleys and connected to the slider. The driving motor is connected to one of the pulleys.

[0012] Furthermore, a rangefinder is provided on the maintenance frame.

[0013] Furthermore, two ends of the lifting frame are provided with docking parts, and the docking parts of the two lifting frames are connected by bolts.

[0014] The present invention has the beneficial effects:

[0015] 1. The unmanned working platform used in the present invention can greatly simplify the structure of the device, reduce the lifting weight of the device, greatly reduce the manufacturing cost and use cost of the device, and the on-site installation is quick and convenient, making the inspection process safer and faster.

[0016] 2. The inspection camera in the present invention can perform surround shooting around the blade, thereby recording the damage on the blade surface, which is clearer and more accurate than human eye observation.

[0017] 3. The lifting frame in the present invention can be rolled together with the tower body through the walking device, so that the entire lifting frame can move along the axial direction of the tower body under the traction of the traction rope, making the moving process more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A structural stereogram of a preferred embodiment of the present invention;

[0019] Figure 2 for Figure 1 A partial enlarged view of point I in the middle;

[0020] Figure 3 for Figure 1 A top view of the structure of the illustrated embodiment;

[0021] Figure 4 for Figure 1 A front view of the structure of the illustrated embodiment;

[0022] Figure 5 for Figure 3 Structural cross-section view along the AA axis;

[0023] Figure 6 This is a working status diagram of the prior art. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0025] like Figures 1 to 6 As shown, a wind turbine blade inspection device includes two semicircular lifting frames 1 that are butt-jointed with each other and sleeved on the outer circumference of a tower body 100. The lifting frame 1 can be made by bending two square steel pipes or round steel pipes and then connecting a plurality of square steel pipes or round steel pipes between the two bent pipe bodies. A butt joint 1.2 is provided at both ends of the lifting frame 1, and the butt joints 1.2 of the two lifting frames 1 are connected by bolts. After the two lifting frames 1 are butt-jointed, a complete circular frame is formed, and the purpose of adopting a split design is to facilitate transportation and installation. As a preferred example, the lifting frame 1 is provided with three walking devices for guiding walking on the surface of the tower body 100 and six lifting ears 1.1 for lifting.

[0026] As a preferred example, the walking device includes two swing arms 2 which are installed to rotate one above and one below. Obviously, each lifting frame 1 is provided with a total of six swing arms 2, of which three swing arms 2 are evenly distributed on the upper side of the lifting frame 1 along the circumferential direction, and three swing arms 2 are evenly distributed on the lower side of the lifting frame 1 along the circumferential direction, and the lifting lugs 1.1 are also distributed in this way. Rollers 4 are installed at the ends of the swing arms 2, and elastic elements 3 are connected between the two swing arms 2 to make the two swing arms 2 have a tendency to swing inwards. The tower body 100 is not a cylindrical tower body, but a conical tower body. Therefore, when the lifting frame 2 moves along the axis of the tower body 100, the outer diameter of the tower body 100 changes gradually. Therefore, through the tension of the elastic element 3, the swing arms 2 are driven to always swing inwards, so that the rollers 4 are always in contact with the surface of the tower body 100. It should be noted that when the lifting frame 1 moves downward, the outer diameter of the tower body 100 increases, and the outward pressure of the tower body 100 on the roller 4 increases, thereby slowing down the descent speed, especially in the critical situation of the traction rope breaking, it can achieve buffering and avoid rapid falling.

[0027] As a preferred example, the elastic element 3 is a leaf spring, an end of which is pivotally connected to the swing arm 2 .

[0028] like Figure 2 and 3As shown, a radially arranged telescopic arm 5 is provided at the center of the outer side of one of the lifting frames 1, and an inspection frame 6 with a blade avoidance structure is provided at the end of the telescopic arm 5. An inspection camera 8 capable of moving around the blade 200 along a predetermined route is provided on the inspection frame 6. The telescopic arm 5 can be a manually controlled telescopic arm, or an electric or hydraulic telescopic arm. The former requires manual adjustment of the telescopic length of the telescopic arm 5 on the ground, while the latter can adjust the telescopic length of the telescopic arm 5 when approaching the blade 200. The blade avoidance structure of the inspection frame 6 enables the blade 200 to pass through, so that the inspection camera 8 can take pictures around the blade 200.

[0029] As a preferred example, a driving device 7 for driving the maintenance camera 8 to make a circular motion is arranged on the maintenance frame 6. Specifically, the driving device 7 comprises a circular track 7.5, a pulley 7.2, a driving motor 7.1, a slider 7.3 and a belt 7.4.

[0030] The two ends of the annular track 7.5 are semicircular tracks and the middle is a straight track. The length and width of the track are determined according to the size of the blade 200 so that the blade 200 can pass through normally. The slider 7.3 is slidably installed on the annular track 7.5, and the maintenance camera 8 is installed on the slider 7.3. The pulleys 7.2 are respectively installed at both ends of the maintenance frame 6 and are concentrically arranged with the two ends of the annular track 7.5. The belt 7.4 is sleeved on the two pulleys 7.2 and connected to the slider 7.3. The drive motor 7.1 is connected to one of the pulleys 7.2. The power for the slider 7.3 to move on the annular track 7.5 comes from the movement of the belt 7.4 driven by the drive motor 7.1. The drive motor 7.1 uses a servo motor.

[0031] As a preferred example, a distance meter 9 is provided on the inspection frame 6. The distance meter 9 is installed downwards, and its function is to detect the distance between the lifting frame 1 and the ground during the movement of the lifting frame 1, so as to determine the height of the lifting frame 1. For example, when damage is detected on the surface of the blade 200, the height at that time is recorded by the distance meter 9, so that the corresponding height can be directly reached for repair in the subsequent manual repair, which provides convenience for the repair operation.

[0032] When inspecting the blades 200, first adjust one of the blades 200 to an angle facing and perpendicular to the ground. Then complete the installation of the lifting frame 1 at the bottom of the tower body 100, the roller 4 is tightly attached to the surface of the tower body 100, and then a plurality of traction ropes 300 are lowered from the top of the tower body 100 and connected to the lifting lugs 1.1. Adjust the length of the telescopic arm 5 so that the blade avoidance structure of the maintenance frame 6 is aligned with the blade 200, and then lift the lifting frame 1 to the height of the blade 200. When the lifting frame 1 reaches the tip of the blade, the speed of the lifting frame 1 is reduced, and the maintenance camera 8 is driven to shoot around the blade 200. When the damaged part is found, the height at this time is recorded until the inspection of the entire blade 200 is completed.

[0033] Finally, the blade 200 is repaired manually according to the damaged position. In the present invention, the "inspection" and "repair" of the existing inspection platform device are simplified to only "inspection" without "repair", and the blade is repaired manually after the inspection is completed. In this way, the risk of the inspection process is reduced.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A wind turbine blade inspection device, characterized in that: The invention comprises two semicircular lifting frames (1) which are butt-jointed and sleeved on the outer circumference of a tower body (100), wherein the lifting frames (1) are provided with at least two walking devices for guiding walking on the surface of the tower body (100) and at least two lifting ears (1.1) for lifting. A telescopic arm (5) arranged radially is arranged on the outer side of one of the lifting frames (1), and a maintenance frame (6) having a blade avoidance structure is arranged at the end of the telescopic arm (5), and a maintenance camera (8) capable of moving around a blade (200) along a predetermined route is arranged on the maintenance frame (6).

2. A wind turbine blade inspection device according to claim 1, characterized in that: The walking device comprises two swing arms (2) which are rotatably mounted one above the other, rollers (4) being mounted at the ends of the swing arms (2), and an elastic element (3) which enables the two swing arms (2) to have an inward swinging tendency being connected between the two swing arms (2).

3. A wind turbine blade inspection device according to claim 2, characterized in that: The elastic element (3) is a leaf spring, an end of which is pivotally connected to the swing arm (2).

4. The wind turbine blade inspection device according to claim 1, characterized in that: The inspection frame (6) is provided with a driving device (7) for driving the inspection camera (8) to perform circular motion.

5. A wind turbine blade inspection device according to claim 4, characterized in that: The driving device (7) comprises a ring track (7.5), a pulley (7.2), a driving motor (7.1), a slider (7.3) and a belt (7.4); The two ends of the annular track (7.5) are semicircular tracks and the middle is a linear track; the slider (7.3) is slidably mounted on the annular track (7.5); and the inspection camera (8) is mounted on the slider (7.3); The pulleys (7.2) are respectively mounted on the two ends of the inspection frame (6) and are arranged concentrically with the two ends of the annular track (7.5); the belt (7.4) is sleeved on the two pulleys (7.2) and connected to the slider (7.3); and the drive motor (7.1) is connected to one of the pulleys (7.2).

6. The wind turbine blade inspection device according to claim 1, characterized in that: The inspection frame (6) is provided with a distance meter (9).

7. The wind turbine blade inspection device according to claim 1, characterized in that: Both ends of the lifting frame (1) are provided with butt joints (1.2), and the butt joints (1.2) of the two lifting frames (1) are connected by bolts.

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