A belt-type cleaning device for the outer wall of a wind turbine tower

Abstract

The present invention discloses a cleaning device for the outer wall of a belt-type wind turbine tower barrel, which includes a transmission box arranged outside the side wall of the tower barrel. The transmission box is penetrated by an annular belt. A driving roller frictionally connected to the belt is arranged in the transmission box. The driving roller is rotationally connected to the transmission box. A driving motor drivingly connected to the driving roller is fixedly arranged on the transmission box. A liquid storage tank filled with a cleaning agent is also arranged on the transmission box. The bottom of the liquid storage tank is connected with a nozzle. A tilted cylindrical roller is rotationally connected to one side of the transmission box close to the tower barrel. Both the roller and the belt are pressed against the outer wall of the tower barrel. After using the present invention, there is no need for high-altitude operation, and the accident of high-altitude falling of operators will not occur, improving the cleaning efficiency and reducing the cleaning cost. Since the nozzle is very close to the surface of the tower barrel, the influence of the wind at high altitude on the cleaning effect is very small, and the cleaning quality can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of maintenance of wind turbine towers, and in particular to a belt-type cleaning device for the outer wall of a wind turbine tower. Background Art

[0002] Wind turbines are long-term exposed to the natural environment. The dust accumulated on the outer wall of the wind turbine tower for a long time may be corrosive. After years of accumulation, it will bring great difficulties to the subsequent cleaning.

[0003] Currently, when cleaning the outer wall of the tower, ropes are usually lowered from the fan on the top of the tower, and then workers are suspended on the ropes to clean the tower. When using this "spiderman" working method to clean the tower at high altitude, it is not only dangerous, but also very costly. Moreover, the wind is very strong at high altitude, and it is not easy to ensure the cleaning effect. The cleaning is time-consuming and laborious, and the efficiency is low.

[0004] At the same time, during cleaning, to prevent the blades of the wind turbine from hurting the operators, the blades of the wind turbine need to stop rotating, thus affecting the normal power generation operation.

[0005] The patent application with the publication number CN110985316A discloses a tower cleaning device for a wind turbine. It pulls two water storage boxes and the bottom first clamp seat and second clamp seat upward through one end of a transmission belt to clean the tower. Since the upper end of the transmission belt needs to be connected to the top of the tower, it still requires workers to climb to the top of the tower to install the transmission belt, which requires high-altitude operation and has a certain degree of danger.

[0006] The patent application with the publication number CN209671146U discloses a cleaning tool for a wind turbine tower, including: a lower ring for clamping with the tower and supporting the workers to stand, and a hoist. The hoist drives the lower ring and the workers on the lower ring to move up and down, and the operators clean the tower. Although it reduces the influence of the wind on the operation, due to the need for high-altitude operation, there is still a risk of falling. The cleaning is time-consuming and laborious, with low efficiency and high cleaning cost. Summary of the Invention

[0007] The purpose of the present invention is to provide a belt-type cleaning device for the outer wall of a wind turbine tower with a simple structure, which is used to replace manual cleaning of the outer wall of the wind turbine tower, so as to improve the cleaning efficiency, reduce the cleaning cost and danger.

[0008] To achieve the above purpose, the technical solution adopted by the present invention is:

[0009] A cleaning device for the outer wall of a belt - type wind turbine tower barrel, comprising a transmission box arranged outside the side wall of the tower barrel. The transmission box is penetrated by an annular belt. A driving roller in frictional transmission connection with the belt is arranged inside the transmission box. The driving roller is rotationally connected to the transmission box. The belt is sleeved outside the tower barrel. The driving roller is aligned with the axial direction of the tower barrel. A driving motor in transmission connection with the driving roller is fixedly arranged on the transmission box. A liquid storage tank filled with a cleaning agent is also arranged on the transmission box. The bottom of the liquid storage tank is connected with a nozzle, and the nozzle faces the outer wall of the tower barrel. A tilted cylindrical roller is rotationally connected to one side of the transmission box close to the tower barrel. Both the roller and the belt are pressed against the outer wall of the tower barrel. When the driving motor drives the driving roller to rotate, under the action of the roller, the transmission box together with the liquid storage tank moves in a spiral shape on the outer wall of the tower barrel.

[0010] Further, there are two symmetrically arranged driving rollers. A tensioning roller is also arranged between the two driving rollers. The tensioning roller is arranged inside the box body. The tensioning roller is parallel to the driving rollers. The two driving rollers and the tensioning roller are arranged in a triangular shape. The belt sequentially bypasses one of the driving rollers, the tensioning roller, and the other driving roller. The tensioning roller is connected to the transmission box.

[0011] Further, a strip - shaped sponge is arranged on the inner side of the belt.

[0012] Further, the sponge is arranged in a tilted manner.

[0013] Further, a sliding frame is slidably connected to the transmission box. The tensioning roller is rotationally connected to the sliding frame. A lead screw is penetrated through the sliding frame. The lead screw is perpendicular to the outer wall of the tower barrel. A tensioning motor in transmission connection with the lead screw is fixedly arranged on the transmission box.

[0014] Further, a guide rod is fixedly arranged on the transmission box. The guide rod is parallel to the lead screw. The guide rod is slidably penetrated through the sliding frame.

[0015] Further, it also includes a controller and a power supply.

[0016] The positive effects of the present invention are as follows:

[0017] 1. The present invention is provided with a belt and a transmission box. The transmission box is provided with a liquid storage tank, a spray head, a driving roller, a tensioning roller, a driving motor, and a roller. When the driving motor drives the driving roller to rotate, the present invention moves vertically along the tower barrel. At the same time, the spray head sprays the cleaning agent in the liquid storage tank onto the surface of the tower barrel to clean the surface of the tower barrel. Therefore, there is no need for high - altitude operation, and the accident of high - altitude falling of operators will not occur. The cleaning efficiency is improved, and the cleaning cost is reduced. Since the nozzle is very close to the surface of the tower barrel, the influence of the wind at high altitude on the cleaning effect is very small, and the cleaning quality can be guaranteed.

[0018] 2. The present invention is provided with a tensioning motor, a lead screw and a sliding frame. The sliding frame is connected to a tensioning roller. When the tensioning motor drives the lead screw to rotate, the tensioning roller pulls the belt, thereby compensating for the change in the diameter of the tower barrel during cleaning, so that the belt is always tightly held on the outer wall of the tower barrel, making the present invention applicable to tower barrels that are thinner at the top and thicker at the bottom. Description of the Drawings

[0019] Figure 1 is a schematic external view of Embodiment 1;

[0020] Figure 2 is a schematic internal structure view of the box body in Embodiment 1;

[0021] Figure 3 is a usage diagram of Embodiment 1;

[0022] Figure 4 is a schematic external view of Embodiment 2;

[0023] Figure 5 is a schematic external view of Embodiment 3;

[0024] Figure 6 is a schematic internal structure view of the box body in Embodiment 3;

[0025] Figure 7 is a schematic connection view of the box body and the sliding frame in Embodiment 3;

[0026] Figure 8 is a schematic internal structure view of the box body in Embodiment 3;

[0027] In the figure:

[0028] 1. Belt; 2. Joint; 3. Driving motor; 4. Nozzle; 5. Liquid storage tank; 6. Cover plate; 7. Box body; 8. Roller; 9. Tensioning roller; 10. Tower barrel; 11. Driving roller; 12. Sponge; 13. Sliding frame; 14. Lead screw; 15. Guide rod; 16. Tensioning motor; 17. Notch. Detailed Embodiments

[0029] Embodiment 1

[0030] As Figures 1 to 3 shown, a belt - type cleaning device for the outer wall of a wind turbine tower barrel includes a transmission box arranged outside the side wall of the tower barrel 10. The transmission box includes a rectangular box body 7 at the lower part and a rectangular cover plate 6 fixedly arranged on the top of the box body 7 by screws. Both edges of the side of the box body 7 close to the tower barrel 10 are provided with notches. The box body 7 is penetrated by a belt 1. The belt 1 passes through the corresponding notches, and the belt 1 is connected into a ring through a joint 2 arranged at the end.

[0031] Inside the box body 7, driving rollers 11 that are frictionally driven and connected to the belt 1 are provided at positions corresponding to the notches. The upper ends of the driving rollers 11 are respectively rotatably connected to the cover plate 6, and the lower ends of the driving rollers 11 are respectively rotatably connected to the box body 7. The belt 1 is sleeved outside the tower barrel 10. The driving rollers 11 are vertically arranged. Driving motors 3 are fixedly provided on the box cover 1 at positions corresponding to the driving rollers 11 through screws. The output shafts of the driving motors 3 all face downward, and the output shafts of the driving motors 3 are respectively transmission-connected to the corresponding driving rollers 11 through couplings.

[0032] On the top surface of the cover plate 6, a liquid storage tank 5 filled with a cleaning agent is fixedly connected through a bracket. A nozzle 4 is connected to the bottom of the liquid storage tank 5. An electric water pump is provided between the nozzle 4 and the liquid storage tank 5. The nozzle 4 faces the outer wall of the tower barrel 10.

[0033] On one side of the transmission box close to the tower barrel 10, five cylindrical rollers 8 arranged in a cross shape are provided. The surfaces of the rollers 8 protrude outward in a drum shape. The rollers 8 are all rotatably connected to the box body 7. The rollers 8 are all inclined and the inclination angle is 45 degrees (the included angle with the horizontal direction).

[0034] A vertical tensioning roller 9 is further provided between the two driving rollers 11. The tensioning roller 9 is arranged inside the box body 7. The two driving rollers 11 and the tensioning roller 9 are arranged in a triangular shape. The belt 1 sequentially bypasses one of the driving rollers 11, the tensioning roller 9, and the other driving roller 11. The upper end of the tensioning roller 9 is connected to the cover plate 6, and the lower end is connected to the box body 7.

[0035] A controller and a power supply are also provided inside the box body. The electric water pump, the driving motor 3, and the power supply are all electrically connected to the controller.

[0036] The working process of the present invention is as follows:

[0037] 1. Disconnect the joint 2, sleeved the belt 1 on the outer wall of the tower barrel 10, and then connect the belt 1 into a ring through the joint 2. At this time, both the belt 1 and the rollers 8 are pressed against the outer wall of the tower barrel 10.

[0038] 2. The controller controls the drive motor 3, which in turn drives the drive roller 11 to rotate in the same direction. Since the belt 1 and the tower 10 rely on friction to maintain the relative circumferential position unchanged, the drive roller 11 will move along the belt 1 when it rotates, and then drive the roller 8 to roll along the surface of the tower 10. Since the roller 8 is set at an angle, the roller 8 will apply a downward force to the box 7 while rolling clockwise along the surface of the tower 10 (looking from top to bottom), and then the drive roller 11 will apply a downward pulling force to the belt 1 in contact with the drive roller 11, so that the belt 1 gradually moves downward. Similarly, the roller 8 rolls counterclockwise along the surface of the tower 10 (looking from top to bottom), and the box 7 and the belt 1 move upward. The movement trajectory of the roller 8 is spiral. At the same time, the controller controls the electric water pump to spray the cleaning agent to the surface of the tower 10 through the nozzle 4 to clean the surface of the tower 10.

[0039] The present invention has a simple structure. By using the present invention, the surface of the tower 10 can be cleaned instead of manually, and there is no need to perform high-altitude operations, so there will be no accidents of workers falling from high altitudes, the cleaning efficiency is improved, and the cleaning cost is reduced. Since the nozzle 4 is very close to the surface of the tower 10, the wind in the high altitude has little effect on the cleaning effect, and the cleaning quality can be guaranteed.

[0040] Example 2

[0041] like Figure 4 As shown, the difference between this embodiment and embodiment 1 is that:

[0042] The inner side of the belt 1 is inlaid with a strip of sponge 12, and the sponge 12 is arranged obliquely.

[0043] When the sponge 12 contacts the tower 10 , friction is generated with the surface of the tower 10 , thereby further improving the cleaning quality.

[0044] Example 3

[0045] like Figures 5 to 8 As shown, the difference between this embodiment and embodiment 2 is that:

[0046] The box body 7 is provided with a C-shaped sliding frame 13 outside, and the bottom of the box body 7 and the cover plate 6 are provided with strip-shaped notches 17 at positions corresponding to the tensioning roller 9. The rotating shafts at both ends of the tensioning roller 9 are respectively located in the corresponding notches 17, and the tensioning roller 9 and the box body 7, as well as the cover plate 6 and the tensioning roller 9 are all connected in a sliding and rotating manner. The upper end and the lower end of the tensioning roller 9 are respectively connected in rotation with the upper part and the lower part of the sliding frame 13. A lead screw 14 is provided through the middle of the sliding frame 13, and the lead screw 14 is perpendicular to the outer wall of the tower 10. A tensioning motor 16 is fixedly provided on the side of the box body 7 away from the tower 10 by screws, and the tensioning motor 16 is electrically connected to the controller, and the tensioning motor 16 is connected to the lead screw 14 through a coupling.

[0047] On one side of the box body 7 away from the tower barrel 10, a guide rod 15 is fixedly arranged by screws. The guide rod 15 is arranged parallel to the lower part of the lead screw 14, and the guide rod 15 is connected with the sliding frame 13 through penetration and sliding.

[0048] When the present invention is applied to a tower barrel 10 with a smaller upper part and a larger lower part, the controller controls the tensioning motor 16 to drive the lead screw 14 to rotate, and then drives the tensioning roller 9 to move in a direction perpendicular to the surface of the tower barrel 10 through the sliding frame 13, so as to compensate for the change in the diameter of the tower barrel 10 during cleaning, and make the belt 1 always tightly hold on the outer wall of the tower barrel 10.

[0049] The tensioning roller 9 pulls the belt 1 to apply a tension force to the belt 1, so that the belt 1 is tightened, and thus the belt 1 tightly holds on the tower barrel 10. The magnitude of the tension force is realized by controlling the current of the tensioning motor 16. The method is as follows:

[0050] When the current of the tensioning motor 16 is I0, the tension force is F0, and at this time the belt 1 tightly holds on the tower barrel 10 reliably. After the belt 1 rises, since the diameter of the tower barrel 10 becomes smaller, the tension force received by the belt 1 becomes smaller, and the real-time tension force received by the belt 1 at this time is F1.

[0051] Then the controller controls the tensioning motor 16 to rotate, and measures that the real-time current of the tensioning motor 16 at this time is I1. Since the tension force received by the belt 1 becomes smaller, I1 < I0. As the tensioning motor 16 rotates, the belt 1 is gradually tightened, the real-time tension force F1 received by the belt 1 gradually approaches F0, and at the same time the real-time current of the tensioning motor 16 gradually approaches I0. When I1 = I0, the tensioning motor 16 stops running. At this time, F1 = F0, and the belt 1 tightly holds on the tower barrel 10 again.

[0052] Therefore, by monitoring the current of the tensioning motor 16, the tension force of the belt 1 can be indirectly detected, so that the belt 1 tightly holds on the outside of the tower barrel 1.

[0053] Similarly, when the present invention moves downward, I1 will be greater than I0, and the tensioning motor 16 can be rotated in the opposite direction to the previous one for adjustment.

[0054] The above-described embodiments are described in detail and specifically, expressing the preferred embodiments of the present invention. They are only used to illustrate the technical ideas and characteristics of the present invention. The purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. However, it is not limited to the present invention alone. The patent scope of the present invention cannot be limited only by this embodiment. That is, any equivalent changes or modifications made in accordance with the spirit disclosed by the present invention, for researchers or technicians in the field, within the structure of the present invention, local improvements within the system and changes and transformations between subsystems are still within the patent scope of the present invention. Currently, the technical solution of this application has undergone pilot testing, that is, small-scale experiments before large-scale production of the product; after the pilot test, user usage research has been carried out on a small scale, and the research results show that user satisfaction is relatively high; now preparations are underway for the formal production and industrialization of the product, including research on intellectual property risk early warning.

Claims

1. A cleaning device for the outer wall of a belt-type wind turbine tower barrel, characterized in that, It includes a transmission box arranged outside the side wall of the tower barrel (10). A belt (1) is arranged through the transmission box. The belt (1) is connected into a ring through a joint (2) arranged at the end. A driving roller (11) that is frictionally connected to the belt (1) is arranged inside the transmission box. The driving roller (11) is rotationally connected to the transmission box. The belt (1) is sleeved outside the tower barrel (10). The driving roller (11) is aligned with the axial direction of the tower barrel (10). A driving motor (3) that is transmissionally connected to the driving roller (11) is fixedly arranged on the transmission box. A liquid storage tank (5) filled with a cleaning agent is also arranged on the transmission box. The bottom of the liquid storage tank (5) is connected with a nozzle (4). The nozzle (4) faces the outer wall of the tower barrel (10). A tilted cylindrical roller (8) is rotationally connected to one side of the transmission box close to the tower barrel (10). Both the roller (8) and the belt (1) are pressed against the outer wall of the tower barrel (10). When the driving motor (3) drives the driving roller (11) to rotate, under the action of the roller (8), the transmission box together with the liquid storage tank (5) moves spirally on the outer wall of the tower barrel (10). There are two symmetrically arranged driving rollers (11). A tensioning roller (9) is also arranged between the two driving rollers (11). The tensioning roller (9) is arranged inside a box body (7). The tensioning roller (9) is parallel to the driving rollers (11). The two driving rollers (11) and the tensioning roller (9) are arranged in a triangular formation. The belt (1) sequentially bypasses one of the driving rollers (11), the tensioning roller (9), and the other driving roller (11). The tensioning roller (9) is connected to the transmission box.

2. The outer wall cleaning device for the tower barrel of a belt-type wind turbine according to claim 1, wherein, A strip-shaped sponge (12) is arranged on the inner side of the belt (1).

3. The outer wall cleaning device for the tower barrel of a belt-driven wind turbine according to claim 2, characterized in that, The sponge (12) is arranged in a tilted manner.

4. The outer wall cleaning device for the tower barrel of the belt-type wind turbine according to claim 1, characterized in that A sliding frame (13) is slidably connected to the transmission box. The tensioning roller (9) is rotationally connected to the sliding frame (13). A lead screw (14) is arranged through the sliding frame (13). The lead screw (14) is perpendicular to the outer wall of the tower barrel (10). A tensioning motor (16) that is transmissionally connected to the lead screw (14) is fixedly arranged on the transmission box.

5. The outer wall cleaning device for the tower barrel of a belt-type wind turbine according to claim 4, characterized in that, A guide rod (15) is fixedly arranged on the transmission box. The guide rod (15) is parallel to the lead screw (14). The guide rod (15) is slidably connected to the sliding frame (13) in a penetrating manner.

6. The outer wall cleaning device for the tower barrel of the belt-type wind turbine according to any one of claims 1 to 5, characterized in that, It also includes a controller and a power supply.

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