A protective device for a wind turbine nacelle cover

Abstract

A protection device for a wind turbine nacelle cover provided by the present invention relates to the field of protection devices and includes a nacelle cover body. An adjustable displacement protection mechanism is connected to the upper end of the nacelle cover body. The adjustable displacement protection mechanism includes a protection support shell, a displacement conveyor belt closing mechanism, a heat dissipation mechanism, and a winding displacement conveyor belt spacing adjustment mechanism. There is a heat dissipation opening on the protection support shell. The displacement conveyor belt closing mechanism is inside the protection support shell, the heat dissipation mechanism is in the middle of the displacement conveyor belt closing mechanism, and the winding displacement conveyor belt spacing adjustment mechanism is connected to the heat dissipation mechanism and the displacement conveyor belt closing mechanism. The displacement conveyor belt closing mechanism closes the heat dissipation opening. When the heat dissipation position is adjusted, a sealing protection effect is achieved. The winding displacement conveyor belt spacing adjustment mechanism adjusts the size of the heat dissipation opening closed by the displacement conveyor belt closing mechanism. The heat dissipation mechanism is arranged on the displacement conveyor belt closing mechanism and moves along with the displacement conveyor belt closing mechanism to adjust the heat dissipation position.

Description

Technical Field

[0001] The present invention relates to the technical field of protective devices, and particularly to a protective device for a wind turbine nacelle cover. Background Art

[0002] A wind turbine nacelle cover refers to an external cover used to protect the internal components of a wind turbine. It is located at the top of the wind turbine. Some power generation equipment is installed inside the nacelle of the wind turbine unit, and these equipment operate continuously. Therefore, the nacelle cover body will heat up with the operation of these power equipment. The heating of the power equipment will affect its working performance, and continuous heat generation that cannot be released will also pose a safety hazard.

[0003] To solve the above problems, the publication (announcement) number: CN117365882B, application number: CN202311544581.0, discloses a heat dissipation device for a wind turbine nacelle cover, including a nacelle cover body. An installation chamber is opened inside the nacelle cover body. A heat dissipation port is opened at the inner wall of the top end of the installation chamber and penetrates through the bottom end of the nacelle cover body. A heat dissipation mechanism for ventilating the installation chamber is arranged at the inner wall of the top end of the installation chamber at the position of the heat dissipation port. The heat dissipation mechanism includes a control frame for fixing. An exhaust air assembly is arranged at the bottom of the control frame. A wind guiding assembly is arranged at the top of the exhaust air assembly and slidably inserted and connected at the position of the heat dissipation port. A shielding assembly is symmetrically connected to the front and back of the wind guiding assembly inside the heat dissipation port. The present invention uses the cooperation of the heat dissipation mechanism and the heat dissipation port to dissipate heat from the nacelle cover body, and then uses the shielding assembly to cooperate with the exhaust air assembly and the wind guiding assembly to implement shielding of the heat dissipation port, achieving shielding protection of the heat dissipation port while ensuring heat dissipation, so that the inside of the nacelle cover body can be protected.

[0004] In the above patent, during the movement of the sliding connection block, it will drive the folding baffle cloth on the corresponding side to be folded or extended to shield the heat dissipation port. However, after the folding baffle cloth is folded, the gap between it and the heat dissipation port will become larger, failing to achieve an ideal protection effect. Moreover, the size of the heat dissipation port is fixed and cannot be adjusted according to the actual situation, resulting in low adaptability.

[0005] In view of the above problems, we propose a protective device for a wind turbine nacelle cover. Summary of the Invention

[0006] In view of the poor protection effect at the heat dissipation port in the above prior art and the problem that the size of its heat dissipation port cannot be effectively adjusted, we propose a protective device for a wind turbine nacelle cover.

[0007] A protective device for a wind turbine nacelle cover provided by the present invention includes a nacelle cover body, and an adjustable displacement protection mechanism is connected to the upper end of the nacelle cover body;

[0008] The adjustable displacement protection mechanism includes a protection support shell, a displacement conveyor belt closing mechanism, a heat dissipation mechanism, a winding displacement conveyor belt spacing adjustment mechanism, and a plugging mechanism;

[0009] The protection support shell is integrally formed and connected to the upper end of the nacelle cover body. A placement bin is provided inside the protection support shell, and the placement bin is connected to the inside of the nacelle cover body in a communicating manner. A heat dissipation port communicating with the placement bin is provided at the upper end of the protection support shell;

[0010] The displacement conveyor belt closing mechanism is arranged inside the protection support shell. The heat dissipation mechanism is arranged at the middle position of the displacement conveyor belt closing mechanism. One end of the winding displacement conveyor belt spacing adjustment mechanism is connected to the heat dissipation mechanism, and the other end is connected to the displacement conveyor belt closing mechanism;

[0011] The plugging mechanism covers the upper end of the heat dissipation port.

[0012] In a further improvement scheme of the present invention, the displacement conveyor belt closing mechanism includes a displacement conveying mechanism, a support side plate, a guiding mechanism, and a protection belt mechanism;

[0013] The displacement conveying mechanism is arranged inside the placement bin and is connected to the protection support shell. The support side plate is threadedly connected to the displacement conveying mechanism and is slidably connected to the protection support shell. The guiding mechanism is arranged inside the placement bin and is connected to the protection support shell. The lower end of the protection belt mechanism is arranged inside the placement bin, and the upper end is arranged inside the heat dissipation port. The protection belt mechanism fits around the guiding mechanism, and both ends of the protection belt mechanism are slidably connected to the support side plate through a sliding mechanism;

[0014] In a further improvement scheme of the present invention, the displacement conveying mechanism includes a driving motor, a threaded rod, and a pulley mechanism. The driving motor is fixedly connected to the protection support shell. There are two groups of threaded rods. One of the threaded rods is fixedly connected to the output end of the driving motor, and the other threaded rod is rotatably connected to the protection support shell through a bearing seat. The two groups of threaded rods are connected through a pulley mechanism, and the threaded rods are threadedly connected to the support side plate;

[0015] The pulley mechanism includes pulleys and an endless belt. There are two pulleys, which are respectively coaxially fixedly sleeved on the two threaded rods, and the two pulleys are connected through an endless belt;

[0016] In a further improvement scheme of the present invention, there are four groups of guiding mechanisms, and the four groups of guiding mechanisms are symmetrically distributed in the X direction and the Y direction. The guiding mechanism includes a rotating rod and a conveying roller. Both ends of the rotating rod are connected to the protection support shell, and the conveying roller is correspondingly arranged at the lower end of the heat dissipation port and is coaxially sleeved on the surface of the rotating rod;

[0017] A further improvement of the present invention, the protective belt mechanism includes a protective belt, a winding roller, and a coupling shaft. The two ends of the protective belt are adhesively wound around the conveying rollers and are arranged at the heat dissipation openings. There are two groups of winding rollers, which are respectively fixedly connected to the two end heads of the protective belt. The coupling shaft is fixedly connected to the side end of the winding roller;

[0018] A further improvement of the present invention, a moving cavity is provided on the end face of the support side plate close to the protective belt. The sliding mechanism includes a guide rail and a slider. The guide rail is arranged in the moving cavity and is fixedly connected to the support side plate. The slider is arranged in the moving cavity and is slidably connected to the guide rail. The slider is rotatably connected to the coupling shaft, and a perforated groove for the threaded rod to pass through is provided on the slider.

[0019] A further improvement of the present invention, the heat dissipation mechanism includes a support plate, a support block, and a blower radiator fan. The support plate is arranged between the two end heads of the protective belt. The support block is connected to the side end of the support plate and is arranged in the moving cavity and is slidably connected to the guide rail. A cylindrical hole for the threaded rod to pass through is provided on the support block. A through hole groove is provided on the support plate, and the blower radiator fan is arranged in the through hole groove;

[0020] A further improvement of the present invention, the winding displacement type conveyor belt spacing adjustment mechanism includes a double-headed electric telescopic rod, a U-shaped frame, a gear, and a rack. The double-headed electric telescopic rod is fixedly connected to the support plate. The U-shaped frame is fixedly connected to the end head of the double-headed electric telescopic rod and is rotatably connected to the coupling shaft. The gear is coaxially fixedly sleeved on the coupling shaft. The rack is engaged with the gear and is fixedly connected to the support side plate through a bracket. One group of the racks on both sides of the support plate is arranged above the gear correspondingly, and the other group is arranged below the corresponding gear.

[0021] A further improvement of the present invention, the blocking mechanism includes a blocking support plate, a blocking plate, an ear plate, and an electric telescopic rod. The blocking support plate is arranged above the protective support shell. The blocking plate is integrally formed and connected to the lower part of the blocking support plate for embedding into the heat dissipation opening. The ear plate is integrally formed and connected to the side end of the blocking support plate. The electric telescopic rod is fixedly connected to the upper part of the protective support shell, and its output end is fixedly connected to the ear plate.

[0022] A further improvement of the present invention, a moving groove is provided on the protective support shell, and the two groups of racks at the upper end are arranged in the moving groove.

[0023] The beneficial effects of the present invention: A protective device for a wind turbine nacelle cover provided by the present invention:

[0024] First, the heat dissipation opening is closed by the displacement type conveyor belt closing mechanism, and a good sealing and protection effect can still be achieved when the position of heat dissipation is adjusted.

[0025] II. Adjust the size of the heat dissipation opening closed by the displacement conveyor belt closing mechanism through the winding displacement type conveyor belt spacing adjustment mechanism, so as to adjust the heat dissipation amount;

[0026] III. Dissipate the heat generated by the internal components of the nacelle body through the heat dissipation mechanism to achieve a good heat dissipation effect;

[0027] IV. The heat dissipation mechanism is arranged on the displacement conveyor belt closing mechanism and moves along with the displacement conveyor belt closing mechanism to adjust the heat dissipation position. Description of the Drawings

[0028] Figure 1 This is the structure of a protection device for a wind turbine nacelle of the present invention Figure One .

[0029] Figure 2 This is the structure of a protection device for a wind turbine nacelle of the present invention Figure Two .

[0030] Figure 3 This is the structural diagram of the adjustable displacement protection mechanism of a protection device for a wind turbine nacelle of the present invention.

[0031] Figure 4 This is the structural diagram of the displacement conveyor belt closing mechanism of a protection device for a wind turbine nacelle of the present invention.

[0032] Figure 5 This is the position diagram of the displacement conveying mechanism, protection belt mechanism, and support side plate of a protection device for a wind turbine nacelle of the present invention.

[0033] Figure 6 This is the structural diagram of the heat dissipation mechanism of a protection device for a wind turbine nacelle of the present invention.

[0034] Figure 7 This is of a protection device for a wind turbine nacelle of the present invention Figure 5 Enlarged view of part A

[0035] Figure 8 This is the structural diagram of the plugging mechanism of a protection device for a wind turbine nacelle of the present invention.

[0036] Figure 9 This is the position diagram of the moving groove of a protection device for a wind turbine nacelle of the present invention on the protection support shell.

[0037] In the attached drawings: 1, nacelle cover body; 2, adjustable displacement protection mechanism; 3, protection support shell; 4, displacement conveyor belt closing mechanism; 5, heat dissipation mechanism; 6, winding displacement conveyor belt spacing adjustment mechanism; 7, plugging mechanism; 8, heat dissipation port; 9, displacement conveying mechanism; 10, support side plate; 11, guiding mechanism; 12, protection belt mechanism; 13, sliding mechanism; 14, driving motor; 15, threaded rod; 16, pulley mechanism; 17, rotating rod; 18, conveying roller; 19, protection belt; 20, winding roller; 21, coupling shaft; 22, moving cavity; 23, slider; 24, support plate; 25, support block; 26, fan heat dissipation fan; 27, cylindrical hole; 28, double-headed electric telescopic rod; 29, U-shaped frame; 30, gear; 31, rack; 32, bracket; 33, plugging support plate; 34, plugging plate; 35, ear plate; 36, electric telescopic rod; 37, moving groove. Detailed implementation manners

[0038] For the convenience of understanding the present invention, the present application will be described more comprehensively below with reference to the relevant attached drawings; the attached drawings show the preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein; similarly, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.

[0039] It should be noted that the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only embodiments.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs; the terms used in the description of the present invention in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0041] According to Figures 1 - 9 As shown in the figure, a protection device for a wind turbine nacelle cover includes a nacelle cover body 1. An adjustable displacement protection mechanism 2 is connected to the upper end of the nacelle cover body 1. The adjustable displacement protection mechanism 2 includes a protection support shell 3. The protection support shell 3 is integrally formed and connected to the upper end of the nacelle cover body 1. A placement chamber is provided inside the protection support shell 3, and the placement chamber is connected to the inside of the nacelle cover body 1. A heat dissipation port 8 communicating with the placement chamber is provided at the upper end of the protection support shell 3, and heat dissipation is carried out through the heat dissipation port 8.

[0042] The adjustable displacement protection mechanism 2 includes a displacement conveyor belt closing mechanism 4. The displacement conveyor belt closing mechanism 4 is arranged inside the protection support shell 3. The displacement conveyor belt closing mechanism 4 includes a displacement conveying mechanism 9, support side plates 10, a guiding mechanism 11, and a protection belt mechanism 12. The displacement conveying mechanism 9 is arranged inside the placement bin and is connected to the protection support shell 3. The displacement conveying mechanism 9 includes a driving motor 14, a threaded rod 15, and a pulley mechanism 16. The driving motor 14 is fixedly connected to the protection support shell 3. There are two groups of threaded rods 15. One of the threaded rods 15 is fixedly connected to the output end of the driving motor 14, and the other threaded rod 15 is rotatably connected to the protection support shell 3 through a bearing seat. The two groups of threaded rods 15 are connected by the pulley mechanism 16. The pulley mechanism 16 includes pulleys and an endless belt. There are two pulleys, which are respectively coaxially fixedly sleeved on the two threaded rods 15. The two pulleys are connected by the endless belt. The threaded rod 15 is threadedly connected to the support side plate 10. When the driving motor 14 is started, it drives the threaded rod 15 to rotate, and then drives the support side plate 10 threadedly connected to the threaded rod 15 to move. The support side plate 10 is threadedly connected to the displacement conveying mechanism 9 and is slidably connected to the protection support shell 3. The guiding mechanism 11 is arranged inside the placement bin and is connected to the protection support shell 3. There are four groups of guiding mechanisms 11, which are symmetrically distributed in the X and Y directions. The guiding mechanism 11 includes a rotating rod 17 and a conveying roller 18. Both ends of the rotating rod 17 are connected to the protection support shell 3. The conveying roller 18 is correspondingly arranged at the lower end of the heat dissipation port 8 and is coaxially sleeved on the surface of the rotating rod 17 to guide the protection belt mechanism 12. The lower end of the protection belt mechanism 12 is arranged inside the placement bin, and the upper end is arranged inside the heat dissipation port 8. The protection belt mechanism 12 fits around the guiding mechanism 11. The two ends of the protection belt mechanism 12 are slidably connected to the support side plate 10 through a sliding mechanism 13. The protection belt mechanism 12 includes a protection belt 19, a winding roller 20, and a connecting shaft 21. Both ends of the protection belt 19 are fitted around the conveying roller 18 and are arranged at the heat dissipation port 8 to close the heat dissipation port 8 through the protection belt 19. There are two groups of winding rollers 20, which are respectively fixedly connected to the two ends of the protection belt 19. The connecting shaft 21 is fixedly connected to the side end of the winding roller 20. A moving cavity 22 is arranged on the end face of the support side plate 10 close to the protection belt 19. The sliding mechanism 13 includes a guide rail and a slider 23. The guide rail is arranged inside the moving cavity 22 and is fixedly connected to the support side plate 10. The slider 23 is arranged inside the moving cavity 22 and is slidably connected to the guide rail. The slider 23 is rotatably connected to the connecting shaft 21. A perforation groove for the threaded rod 15 to pass through is arranged on the slider 23.

[0043] The adjustable displacement protection mechanism 2 includes a heat dissipation mechanism 5. The heat dissipation mechanism 5 is arranged at the middle position of the displacement conveyor belt closing mechanism 4. The heat dissipation mechanism 5 includes a support plate 24, a support block 25, and a fan heat radiator 26. The support plate 24 is arranged between the two ends of the protection belt 19. The support block 25 is connected to the side end of the support plate 24 and is arranged in the moving cavity 22 and is slidably connected to the guide rail. A cylindrical hole 27 for the threaded rod 15 to pass through is provided on the support block 25. A through hole groove is provided on the support plate 24. The fan heat radiator 26 is arranged in the through hole groove for heat dissipation.

[0044] The adjustable displacement protection mechanism 2 includes a winding displacement conveyor belt spacing adjustment mechanism 6. One end of the winding displacement conveyor belt spacing adjustment mechanism 6 is connected to the heat dissipation mechanism 5, and the other end is connected to the displacement conveyor belt closing mechanism 4. The winding displacement conveyor belt spacing adjustment mechanism 6 includes a double-headed electric telescopic rod 28, a U-shaped frame 29, a gear 30, and a rack 31. The double-headed electric telescopic rod 28 is fixedly connected to the support plate 24. The U-shaped frame 29 is fixedly connected to the end of the double-headed electric telescopic rod 28 and is rotatably connected to the coupling shaft 21. The gear 30 is coaxially and fixedly sleeved on the coupling shaft 21. The rack 31 meshes with the gear 30 and is fixedly connected to the support side plate 10 through a bracket 32. One set of the racks 31 on both sides of the support plate 24 is correspondingly arranged above the gear 30, and the other set is arranged below the corresponding gear 30. When the double-headed electric telescopic rod 28 is started, it drives the U-shaped frame 29 to move, drives the coupling shaft 21 to move, drives the gear 30 to move. With the assistance of the rack 31, the gear 30 rotates while moving, driving the coupling shaft 21 and the winding roller 20 to rotate. Since the racks 31 at the left and right ends of the support plate 24 are distributed up and down, the rotation directions of the two winding rollers 20 are opposite. Therefore, one winding roller 20 moves to wind up the protection belt 19, and the other winding roller 20 moves to loosen the protection belt 19. And the moving directions of the two winding rollers 20 are opposite. Therefore, the shielding of the heat dissipation port 8 by the protection belt 19 can be adjusted, thereby adjusting the size of the heat dissipation port 8. A moving groove 37 is provided on the protection support shell 3, and the two sets of racks 31 at the upper end are arranged in the moving groove 37 to give enough space for the racks 31.

[0045] The adjustable displacement protection mechanism 2 includes a blocking mechanism 7. The blocking mechanism 7 covers the upper end of the heat dissipation port 8. The blocking mechanism 7 includes a blocking support plate 33, a blocking plate 34, an ear plate 35, and an electric telescopic rod 36. The blocking support plate 33 is arranged above the protection support shell 3. The blocking plate 34 is integrally formed and connected to the lower part of the blocking support plate 33 for embedding into the heat dissipation port 8. The ear plate 35 is integrally formed and connected to the side end of the blocking support plate 33. The electric telescopic rod 36 is fixedly connected to the upper part of the protection support shell 3, and its output end is fixedly connected to the ear plate 35. When the electric telescopic rod 36 is started, it drives the ear plate 35, the blocking support plate 33, and the blocking plate 34 to move upward, and the blocking plate 34 does not block the heat dissipation port 8.

[0046] Principle of the present invention:

[0047] During use, the electric telescopic rod 36 is activated to drive the ear plate 35, the plugging support plate 33, and the plugging plate 34 to move upward. The plugging plate 34 does not block the heat dissipation port 8, and the fan radiator 26 is activated to dissipate heat inside the nacelle body 1.

[0048] When the position needs to be adjusted, the drive motor 14 is activated to drive the threaded rod 15 to rotate, and drives another threaded rod 15 to rotate through the pulley mechanism 16. Through the rotation of the two threaded rods 15, the movement of the two support side plates 10 is driven, and then the movement of the support block 25 and the support plate 24 is driven, and then the movement of the double-headed electric telescopic rod 28 is driven, and then the movement of the U-shaped frame 29, the connecting shaft 21, and the protective belt 19 is driven. The guiding mechanism 11 guides and conveys the protective belt 19, so that displacement can occur between the two ends of the protective belt 19, and the distance can remain unchanged. The remaining positions of the heat dissipation port 8 are blocked by the protective belt 19, which can not only ensure the heat dissipation effect at each position, but also ensure the sealing of the heat dissipation port 8 during heat dissipation.

[0049] When the size of the heat dissipation port 8 needs to be adjusted, the double-headed electric telescopic rod 28 is activated to drive the U-shaped frame 29 to move, drive the connecting shaft 21 to move, drive the gear 30 to move. With the assistance of the rack 31, the gear 30 rotates while moving, driving the connecting shaft 21 and the winding roller 20 to rotate. Since the racks 31 at the left and right ends of the support plate 24 are distributed up and down, the rotation directions of the two winding rollers 20 are opposite. Therefore, one winding roller 20 moves to wind up the protective belt 19, and the other winding roller 20 moves to release the protective belt 19, and the moving directions of the two winding rollers 20 are opposite. Therefore, the shielding of the heat dissipation port 8 by the protective belt 19 can be adjusted, thereby adjusting the size of the heat dissipation port 8.

[0050] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this technology can make various modifications and decorations without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be defined by the claims.

Claims

1. A protective device for a wind turbine nacelle cover, comprising a nacelle cover body (1), characterized in that: An adjustable displacement protection mechanism (2) is connected to the upper end of the nacelle cover body (1); The adjustable displacement protection mechanism (2) includes a protection support shell (3), a displacement conveyor belt closing mechanism (4), a heat dissipation mechanism (5), a winding displacement conveyor belt spacing adjustment mechanism (6), and a plugging mechanism (7); The protection support shell (3) is integrally formed and connected to the upper end of the nacelle cover body (1). A placement bin is provided inside the protection support shell (3), and the placement bin is connected to the inside of the nacelle cover body (1). A heat dissipation port (8) communicating with the placement bin is provided at the upper end of the protection support shell (3); The displacement conveyor belt closing mechanism (4) is arranged inside the protection support shell (3). The heat dissipation mechanism (5) is arranged at the middle position of the displacement conveyor belt closing mechanism (4). One end of the winding displacement conveyor belt spacing adjustment mechanism (6) is connected to the heat dissipation mechanism (5), and the other end is connected to the displacement conveyor belt closing mechanism (4); The plugging mechanism (7) covers the upper end of the heat dissipation port (8); The displacement conveyor belt closing mechanism (4) includes a displacement conveying mechanism (9), support side plates (10), a guiding mechanism (11), and a protection belt mechanism (12); The displacement conveying mechanism (9) is arranged inside the placement bin and is connected to the protection support shell (3). The support side plates (10) are threadedly connected to the displacement conveying mechanism (9) and are slidably connected to the protection support shell (3). The guiding mechanism (11) is arranged inside the placement bin and is connected to the protection support shell (3). The lower end of the protection belt mechanism (12) is arranged inside the placement bin, and the upper end is arranged inside the heat dissipation port (8). The protection belt mechanism (12) fits around the guiding mechanism (11), and both ends of the protection belt mechanism (12) are slidably connected to the support side plates (10) through a sliding mechanism (13).

2. The protective device for a wind turbine nacelle cover according to claim 1, characterized in that: The displacement conveying mechanism (9) includes a driving motor (14), a threaded rod (15), and a pulley mechanism (16). The driving motor (14) is fixedly connected to the protection support shell (3). There are two groups of threaded rods (15). One of the threaded rods (15) is fixedly connected to the output end of the driving motor (14), and the other threaded rod (15) is rotatably connected to the protection support shell (3) through a bearing seat. The two groups of threaded rods (15) are connected through the pulley mechanism (16); The pulley mechanism (16) includes pulleys and an endless belt. There are two pulleys, which are respectively coaxially fixed on the two threaded rods (15). The two pulleys are connected through the endless belt.

3. The protection device for a wind turbine nacelle cover according to claim 2, characterized in that: There are four groups of the guiding mechanisms (11). The four groups of guiding mechanisms (11) are symmetrically distributed in the X direction and the Y direction. The guiding mechanism (11) includes a rotating rod (17) and a conveying roller (18). Both ends of the rotating rod (17) are connected to the protection support shell (3). The conveying roller (18) is correspondingly arranged at the lower end of the heat dissipation port (8) and is coaxially sleeved on the surface of the rotating rod (17).

4. The protective device for a wind turbine nacelle cover according to claim 3, characterized in that: The protective belt mechanism (12) includes a protective belt (19), a winding roller (20), and a coupling shaft (21). Both ends of the protective belt (19) are closely wound around the conveying roller (18) and are arranged at the heat dissipation opening (8). There are two sets of winding rollers (20), which are respectively fixedly connected to both ends of the protective belt (19), and the coupling shaft (21) is fixedly connected to the side end of the winding roller (20).

5. The protective device for a wind turbine nacelle cover according to claim 4, characterized in that: A moving cavity (22) is provided on the end face of the support side plate (10) close to the protective belt (19). The sliding mechanism (13) includes a guide rail and a slider (23). The guide rail is arranged in the moving cavity (22) and is fixedly connected to the support side plate (10). The slider (23) is arranged in the moving cavity (22) and is slidably connected to the guide rail. The slider (23) is rotatably connected to the coupling shaft (21).

6. The protective device for a wind turbine nacelle cover according to claim 5, wherein: The heat dissipation mechanism (5) includes a support plate (24), a support block (25), and a fan heat radiator (26). The support plate (24) is arranged between the two ends of the protective belt (19). The support block (25) is connected to the side end of the support plate (24) and is arranged in the moving cavity (22) and is slidably connected to the guide rail. A cylindrical hole (27) for the threaded rod (15) to pass through is provided on the support block (25), and a through hole groove is provided on the support plate (24). The fan heat radiator (26) is arranged in the through hole groove.

7. The protective device for a wind turbine nacelle cover according to claim 6, wherein: The winding displacement type conveyor belt spacing adjustment mechanism (6) includes a double-headed electric telescopic rod (28), a U-shaped frame (29), a gear (30), and a rack (31). The double-headed electric telescopic rod (28) is fixedly connected to the support plate (24). The U-shaped frame (29) is fixedly connected to the end of the double-headed electric telescopic rod (28) and is rotatably connected to the coupling shaft (21). The gear (30) is coaxially and fixedly sleeved on the coupling shaft (21). The rack (31) is meshed with the gear (30) and is fixedly connected to the support side plate (10) through a bracket (32). One set of the racks (31) on both sides of the support plate (24) is correspondingly arranged above the gear (30), and the other set is arranged below the corresponding gear (30).

8. The protective device for a wind turbine nacelle cover according to claim 7, characterized in that: The blocking mechanism (7) includes a blocking support plate (33), a blocking plate (34), an ear plate (35), and an electric telescopic rod (36). The blocking support plate (33) is arranged above the protective support shell (3). The blocking plate (34) is integrally formed and connected to the lower part of the blocking support plate (33) for embedding into the heat dissipation opening (8). The ear plate (35) is integrally formed and connected to the side end of the blocking support plate (33). The electric telescopic rod (36) is fixedly connected above the protective support shell (3), and its output end is fixedly connected to the ear plate (35).

9. The protective device for a wind turbine nacelle cover according to claim 8, characterized in that: A moving groove (37) is provided on the protective support shell (3), and the two sets of racks (31) at the upper end are arranged in the moving groove (37).

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