Safety protection device for high-altitude maintenance of wind turbine generator

Abstract

The invention discloses a safety protection device for high-altitude maintenance of a wind turbine generator, and relates to the technical field of high-altitude maintenance protection of the wind turbine generator, the safety protection device comprises a mounting bottom plate, a protection back plate, a supporting plate, a reinforcing rope and a tool box, protection side plates are mounted on the left side and the right side of the upper surface of the mounting bottom plate, and a through groove is formed in the protection back plate; supporting plates are mounted on the left side and the right side of the upper surface of the mounting bottom plate correspondingly, and a connector is mounted on a reinforcing rope. And tool boxes and supporting blocks are installed on the opposite sides of the supporting plates correspondingly, a cover plate is arranged above the tool boxes, and pedals are installed on the left side and the right side of the upper surface of the mounting bottom plate through telescopic springs correspondingly. According to the safety protection device for high-altitude maintenance of the wind turbine generator set, tools are stored in a classified mode through the partition plates in the tool box, and scattered tools are prevented from sliding off or being lost or occupying the operation space; the cover plate can be driven to move upwards through the connecting rope by stepping on the pedal, manual opening is not needed, the tool searching and taking time is shortened, and the overhauling efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of high-altitude maintenance and protection technology for wind turbine generators, specifically a safety protection device for high-altitude maintenance of wind turbine generators. Background Technology

[0002] As a core piece of equipment for new energy power generation, wind turbines are mostly installed in open areas such as mountains, grasslands, and coastlines. Leveraging their advantages in clean and renewable energy conversion, they have become a key force in the global energy structure transformation. Mountain wind farms often face rugged terrain and variable climates, grassland wind farms are susceptible to strong gusts and freezing temperatures, while coastal and offshore wind farms must withstand harsh conditions such as high salt spray and typhoons. The core components of wind turbines, such as the nacelle, hub, and blades, are typically installed at altitudes of 50-150 meters above the ground to capture higher wind speeds. Some offshore wind turbines even have nacelles exceeding 200 meters in height. These high-altitude components are constantly exposed to complex natural environments, affected by airflow impacts, temperature fluctuations, and salt corrosion, making them prone to gearbox wear, blade cracks, and main shaft seal failures. Regular, meticulous maintenance is necessary to ensure the unit's power generation efficiency and operational stability. The nacelle, hub, and blades, being located at high altitudes, require regular maintenance to ensure stable operation. High-altitude maintenance work presents a complex environment with multiple safety risks, including strong winds, low temperatures, falls from heights, and falling objects. For example, maintenance of equipment inside the nacelle requires moving within confined spaces, while hub and blade maintenance necessitates working around rotating components. Any oversight in safety precautions can lead to accidents. As wind turbines age, the frequency and intensity of maintenance work have increased significantly, making safety requirements for high-altitude maintenance increasingly stringent.

[0003] With the rapid growth of global wind power installed capacity, the cumulative installed capacity of wind power worldwide exceeded 1.5 terawatts by 2024. Early-operated wind turbines are gradually entering their aging phase, with over 40% of turbines having been in operation for more than 10 years. Equipment failure rates have increased significantly, leading to a substantial increase in maintenance frequency and workload. Simultaneously, the wind power industry is developing towards higher power and larger scale, with the nacelles of new-generation wind turbines weighing over 100 tons and blades exceeding 120 meters in length, further increasing the complexity and risk level of maintenance operations. Whether it's life-extending maintenance of older turbines or operation and maintenance support for new turbines, more stringent requirements are being placed on the safety protection system for high-altitude maintenance. Traditional protection methods are no longer sufficient to cover the safety needs in complex scenarios, necessitating the upgrading to more professional and reliable safety protection solutions.

[0004] Against this backdrop, the development of safety protection devices for high-altitude maintenance of wind turbines is of great practical significance. Their application can not only significantly reduce the safety risks of high-altitude maintenance of wind turbines and protect the lives of maintenance personnel, but also improve the efficiency and reliability of maintenance operations, playing an important supporting role in promoting the safe and sustainable development of the wind power industry.

[0005] For example, Chinese utility model patent application number 202022094267.5 discloses a high-altitude maintenance platform for wind turbine blades, including a base and a support platform mounted on the base via a rotating mechanism. Vertical guardrails are installed along the edges of the support platform, with one side featuring an outward-facing guardrail. The bottom of the outward-facing guardrail is hinged to the support platform, and a lock is installed at the top of the outward-facing guardrail for locking with adjacent guardrails. Several safety chains connect the outward-facing guardrails to adjacent guardrails. A horizontally positioned limiting support plate is also fixedly installed at the bottom of the support platform on the side with the outward-facing guardrail. This maintenance platform is reasonably designed and safe and reliable. The outward-facing guardrails effectively expand the working space for maintenance personnel, facilitating adjustments to their maintenance positions and significantly improving the efficiency of wind turbine blade maintenance. However, the device still has certain shortcomings.

[0006] The lack of proper storage and retrieval of tools for maintenance makes it difficult to organize and access them. During operation, scattered tools are often placed on the nacelle platform or equipment surface, not only occupying limited working space but also potentially slipping into the nacelle or onto the ground due to collisions, causing tool damage or secondary safety accidents. In addition, different maintenance procedures require frequent switching of tools such as wrenches, screwdrivers, and testing instruments. The lack of a categorized storage structure leads to time-consuming tool searches and prolongs the operation time. This problem is particularly prominent in harsh environments such as strong winds and low temperatures, where hand dexterity is reduced and tool retrieval becomes more difficult. More importantly, disorderly tool storage can easily lead to the loss of small parts, affecting the quality of maintenance and assembly. Once tools are dropped or lost, they need to be redistributed, further delaying the maintenance progress and making it difficult to meet the "efficient, safe, and orderly" operation requirements for high-altitude maintenance of wind turbine units.

[0007] Therefore, we propose a safety protection device for high-altitude maintenance of wind turbine units to solve the problems mentioned above. Summary of the Invention

[0008] The purpose of this invention is to provide a safety protection device for high-altitude maintenance of wind turbines, addressing the aforementioned issues raised in the background section regarding the inconvenience of storing and retrieving maintenance tools on the market. During operation, scattered tools are often placed on the nacelle platform or equipment surface, not only occupying limited working space but also potentially slipping into the nacelle or onto the ground due to collisions, causing tool damage or secondary safety accidents. Furthermore, different maintenance procedures require frequent switching between wrenches, screwdrivers, testing instruments, etc., and the lack of a categorized storage structure leads to time-consuming tool searches, extending operation time. This is especially pronounced in harsh environments such as strong winds and low temperatures, where reduced hand dexterity exacerbates the difficulty in tool retrieval. More importantly, disorderly tool storage easily leads to the loss of small parts, affecting the quality of maintenance and assembly. Furthermore, tools that fall or are lost require relocation, further delaying the maintenance progress and failing to meet the "efficient, safe, and orderly" operational requirements for high-altitude maintenance of wind turbines.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a safety protection device for high-altitude maintenance of wind turbine units, comprising a mounting base plate, a protective back plate, a support plate, a reinforcing rope, and a toolbox. Protective side plates are installed on both the left and right sides of the upper surface of the mounting base plate, and protective door components and a protective back plate are respectively installed on the front and rear sides of the mounting base plate. A through groove is provided on the protective back plate, and a protective railing is provided inside the through groove.

[0010] Support plates are installed on both the left and right sides of the upper surface of the mounting base plate, and a reinforcing rope is installed on the upper part of the support plate through a connecting block. A connector is installed on the reinforcing rope, and a fall arrestor is installed above the connector.

[0011] Toolboxes and support blocks are installed on opposite sides of the support plate, and pulley assemblies are installed on opposite sides of the support blocks. Connecting ropes are installed on the pulley assemblies. A cover plate is provided above the toolbox. Pedals are installed on the left and right sides of the upper surface of the mounting base plate via telescopic springs.

[0012] Preferably, guide rails are installed on both the left and right sides of the inside of the through groove, and the guardrail is slidably connected to the guide rails.

[0013] With the above structural design, the guide rail provides a sliding trajectory for the guardrail, restricts the direction of movement of the guardrail, avoids deviation during adjustment, and ensures that the gaps in the guardrail are accurately aligned with the maintenance position.

[0014] Preferably, a threaded rod is installed on the protective back plate, and the lower end of the threaded rod is connected to the guardrail through a bearing seat.

[0015] With the above structural design, the threaded rod on the rotating protective back plate drives the guardrail to move along the guide rail through the bearing seat, adjusting the gap position of the guardrail, which can be adapted to small maintenance areas without moving the lifting platform.

[0016] Preferably, the fall arrestor is equipped with a fall arrest rope, the lower end of which is connected to a connector, and a locking hook is installed on the top of the fall arrestor.

[0017] With the above structural design, the fall arrestor is fixed by a locking hook, and the lower end of the fall arrestor rope is connected to the connector of the reinforcing rope, forming a double fall arrestor structure. When the device is at risk of falling, the fall arrestor locks and pulls to prevent it from falling.

[0018] Preferably, the toolbox has a partition plate installed inside, and through holes are provided on the bottom and cover of the toolbox, through which the connecting rope passes.

[0019] With the above structural design, the partitions categorize and store tools to prevent them from slipping or being lost; the through holes at the bottom of the toolbox and the cover allow connecting ropes to pass through, providing a structural basis for the linkage of the cover.

[0020] Preferably, the support block is located above the toolbox, and the toolbox is detachably connected to the support plate.

[0021] With the above structural design, the toolbox and support plate can be detachably connected, which facilitates the maintenance and replacement of the toolbox, or the centralized replenishment of tools, and is suitable for long-term maintenance operations.

[0022] Preferably, a central block is installed on the upper surface of the cover plate, and the upper part of the central block is connected to a connecting rope.

[0023] With the above structural design, when the connecting rope is pulled by force, the cover plate is moved through the central block, thereby realizing the opening and closing of the cover plate.

[0024] Preferably, a guide frame is provided below the support block, the guide frame is fixed on the support plate, the cover plate passes through the guide frame, and the cover plate is slidably connected to the guide frame.

[0025] With the above structural design, the guide frame limits the cover plate, ensuring that the cover plate slides along a fixed trajectory, avoiding jamming or offset when opening or closing, and ensuring smooth tool handling.

[0026] Preferably, each of the protective side plates is provided with a guide groove, the pedal is located in the guide groove, and the upper surface of the pedal is provided with anti-slip texture.

[0027] With the above structural design, the guide groove provides installation space for the pedal, and the anti-slip texture on the pedal increases the friction of the foot, preventing slippage during high-altitude operations and improving operational safety.

[0028] Preferably, a guide rod is installed inside the guide groove, the guide rod passes through the pedal, the pedal is slidably connected to the guide rod, and the pedal is connected to the lower front end of the connecting rope.

[0029] With the above structural design, the guide rod passes through the pedal to limit the pedal's movement trajectory; the pedal is connected to the connecting rope, and when the foot steps on the pedal, the connecting rope drives the cover plate to move upward. After releasing, the telescopic spring drives the pedal to return to its original position, and the cover plate closes synchronously.

[0030] Compared with the prior art, the beneficial effects of the present invention are: a safety protection device for high-altitude maintenance of wind turbine units:

[0031] 1. High safety for working at heights, with comprehensive fall protection.

[0032] The mounting base plate can be firmly fixed to an external lift or crane, and can be flexibly raised and lowered with the equipment to accurately reach high-altitude maintenance areas such as the wind turbine nacelle and hub. The fall arrestor is connected to the external stabilizing structure through a locking hook, and the fall arrest rope at its lower end is tightly connected to the connector on the reinforcing rope to form double fall protection. Even if the mounting base plate is unstable, the risk of falling can be effectively avoided through double traction, building a solid safety line for maintenance personnel at high altitudes. The protective side plates, protective door components and protective back plate form a closed protective space to block interference from strong winds at high altitudes, while preventing tools or parts from falling accidentally and avoiding secondary safety accidents. The protective railing in the through groove of the protective back plate can slide flexibly along the guide rail, and the gap position of the protective railing can be precisely adjusted by rotating the threaded rod. For small maintenance points close to the protected area, the maintenance position can be exposed in the gap of the protective railing without moving the lift or crane, which not only ensures safety protection during the operation, but also does not affect the flexibility and convenience of maintenance operations, adapting to the diverse high-altitude maintenance needs of wind turbines.

[0033] 2. Tools are neatly organized and easy to access.

[0034] The toolbox's internal dividers allow for categorized storage of tools, preventing loose tools from slipping, getting lost, or taking up workspace. Stepping on a pedal allows the cover to be raised via a connecting rope, eliminating the need for manual opening, reducing tool search and retrieval time, and improving maintenance efficiency.

[0035] 3. Highly flexible in maintenance, adaptable to various scenarios.

[0036] The threaded rod on the rotating protective backplate transmits power through the bearing housing, precisely driving the guardrail to slide smoothly along the guide rail in the through groove, flexibly adjusting the position and gap orientation of the guardrail. For small maintenance areas such as the edge of the wind turbine nacelle and blade connection points, there is no need to frequently move external lifts or cranes to adjust the overall device position. Simply adjusting the guardrail allows the maintenance point to be precisely aligned with the gap, reducing the cumbersome process of equipment scheduling and avoiding the safety hazards of moving the device at high altitudes. It efficiently adapts to the maintenance needs of wind turbines at different heights and locations. The toolbox on the support plate is detachable, and can be easily separated from the support plate. When maintenance tools are worn out, the toolbox can be quickly removed for replenishment, or the appropriate tool set can be replaced according to different maintenance procedures. At the same time, the detachable structure also facilitates the cleaning and maintenance of the toolbox itself, avoiding problems such as dust accumulation and component aging caused by long-term use at high altitudes. This design allows the device to not only meet the needs of single maintenance operations, but also adapt to long-term, high-frequency wind turbine maintenance scenarios, significantly improving the continuity and practicality of operations.

[0037] 4. Stable and reliable operation, suitable for high-altitude environments.

[0038] The anti-slip texture on the pedal increases the contact friction between the foot and the pedal, effectively preventing slippage even in harsh environments such as high-altitude strong winds and low-temperature condensation, providing stable support for maintenance personnel. Simultaneously, a guide rod within the guide groove runs through the pedal, strictly limiting its movement trajectory and ensuring smooth, non-deviation-free pedaling, further enhancing operational safety. The cover plate runs through a guide frame on the support plate, which precisely limits the cover plate's position, preventing deviation or jamming during opening or closing, ensuring smooth and efficient tool retrieval and storage. The telescopic spring on the mounting plate remains in a charged state; when the pedal is released, the spring's elastic restoring force quickly drives the pedal to reset, and the cover plate automatically closes via a connecting rope, requiring no additional manual intervention. This linked reset design reduces the amount of hand manipulation during high-altitude operations, lowers safety hazards caused by hand fatigue or operational errors, significantly simplifies the work process, and allows maintenance personnel to focus more on core maintenance tasks. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the overall main structure of the present invention;

[0040] Figure 2 This is a schematic diagram of the two-dimensional main view structure of the present invention;

[0041] Figure 3 This is a schematic diagram of the structure of the cover plate of the present invention when it is closed;

[0042] Figure 4 This is a schematic diagram showing the position and structure of the cover plate and guide frame of the present invention;

[0043] Figure 5 This is a schematic diagram of the internal structure of the toolbox of the present invention;

[0044] Figure 6 This is a schematic diagram of the connection structure between the telescopic spring and the pedal of the present invention;

[0045] Figure 7 This is a schematic diagram of the guide groove position structure of the present invention;

[0046] Figure 8 This is a schematic diagram of the protective backplate structure of the present invention;

[0047] Figure 9 This is a schematic diagram showing the position and structure of the guardrail and guide rail of the present invention;

[0048] Figure 10 This is a schematic diagram of the connection structure of the fall arrestor of the present invention.

[0049] In the diagram: 1. Mounting base plate; 2. Protective side plate; 3. Protective door assembly; 4. Protective back plate; 5. Through groove; 6. Guide rail; 7. Guardrail; 8. Threaded rod; 9. Support plate; 10. Connecting block; 11. Reinforcing rope; 12. Connector; 13. Fall arrestor; 14. Fall arrest rope; 15. Locking hook; 16. Toolbox; 17. Divider plate; 18. Support block; 19. Pulley assembly; 20. Connecting rope; 21. Center block; 22. Cover plate; 23. Guide frame; 24. Guide groove; 25. Telescopic spring; 26. Pedal; 27. Guide rod. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] Please see Figures 1-10This invention provides a technical solution: a safety protection device for high-altitude maintenance of wind turbine units, comprising a mounting base plate 1, protective side plates 2, a protective door assembly 3, a protective back plate 4, a through groove 5, a guide rail 6, a guardrail 7, a threaded rod 8, a support plate 9, a connecting block 10, a reinforcing rope 11, a connector 12, a fall arrestor 13, a fall arrest rope 14, a locking hook 15, a toolbox 16, a partition plate 17, a support block 18, a pulley assembly 19, a connecting rope 20, a center block 21, a cover plate 22, a guide frame 23, a guide groove 24, a telescopic spring 25, a pedal 26, and a guide rod 27. Protective side plates 2 are installed on both the left and right sides of the upper surface of the mounting base plate 1, and protective side plates 2 are installed on the front and rear sides of the mounting base plate 1 respectively. The device is equipped with a protective door assembly 3 and a protective back panel 4. The protective back panel 4 has a through groove 5, and a protective railing 7 is installed inside the through groove 5. Guide rails 6 are installed on both the left and right sides inside the through groove 5. The protective railing 7 is slidably connected to the guide rails 6. The guide rails 6 provide a sliding track for the protective railing 7, restrict the movement direction of the protective railing 7, prevent deviation during adjustment, and ensure that the gap of the protective railing 7 is accurately aligned with the maintenance position. A threaded rod 8 is installed on the protective back panel 4. The lower end of the threaded rod 8 is connected to the protective railing 7 through a bearing seat. Rotating the threaded rod 8 on the protective back panel 4 drives the protective railing 7 to move along the guide rail 6 through the bearing seat, adjusting the gap position of the protective railing 7. It can adapt to small maintenance areas without moving the lifting platform.

[0052] Support plates 9 are installed on both the left and right sides of the upper surface of the mounting base plate 1. A reinforcing rope 11 is installed on the upper part of the support plate 9 via a connecting block 10. A connector 12 is installed on the reinforcing rope 11, and a fall arrestor 13 is installed above the connector 12. A fall arrestor rope 14 is installed on the fall arrestor 13. The lower end of the fall arrestor rope 14 is connected to the connector 12. A locking hook 15 is installed on the upper part of the fall arrestor 13. The fall arrestor 13 is fixed by the locking hook 15. The lower end of the fall arrestor rope 14 is connected to the connector 12 of the reinforcing rope 11, forming a double fall arrestor structure. When the device is at risk of falling, the fall arrestor 13 locks and pulls to prevent it from falling.

[0053] Toolboxes 16 and support blocks 18 are installed on opposite sides of support plate 9, and pulley assemblies 19 are installed on opposite sides of support blocks 18. Connecting ropes 20 are installed on pulley assemblies 19. Dividers 17 are installed inside toolboxes 16. Through holes are opened on the bottom of toolboxes 16 and cover plate 22. Connecting ropes 20 pass through the through holes. Dividers 17 classify and store tools to prevent loose tools from slipping or being lost. The through holes at the bottom of toolboxes 16 and cover plate 22 allow connecting ropes 20 to pass through, providing a structural basis for the linkage of cover plate 22. Support blocks 18 are located on the toolboxes. Above toolbox 16, toolbox 16 is detachably connected to support plate 9. This detachable connection facilitates maintenance, replacement, and centralized replenishment of tools, adapting to long-term maintenance needs. A cover plate 22 is installed above toolbox 16, with a center block 21 mounted on its upper surface. The center block 21 is connected to a connecting rope 20. When the connecting rope 20 is pulled, the center block 21 moves the cover plate 22, opening and closing it. A guide frame 23 is installed below support block 18 to guide... The frame 23 is fixed to the support plate 9. The cover plate 22 passes through the guide frame 23 and is slidably connected to the guide frame 23. The guide frame 23 limits the cover plate 22, ensuring that the cover plate 22 slides along a fixed trajectory, avoiding jamming or offset when opening or closing, and ensuring smooth tool retrieval. The upper surface of the mounting base plate 1 has pedals 26 installed on both the left and right sides via telescopic springs 25. The protective side plates 2 are provided with guide grooves 24, and the pedals 26 are located in the guide grooves 24. The upper surface of the pedals 26 is provided with anti-slip textures, and the guide grooves 24 provide installation space for the pedals 26. The anti-slip texture on the pedal 26 increases the friction of the foot, preventing slippage during high-altitude operations and improving operational safety. A guide rod 27 is installed inside the guide groove 24, passing through the pedal 26. The pedal 26 is slidably connected to the guide rod 27. The pedal 26 is connected to the lower front end of the connecting rope 20. The guide rod 27 passes through the pedal 26, limiting the movement trajectory of the pedal 26. The pedal 26 is connected to the connecting rope 20. When the foot steps on the pedal 26, the connecting rope 20 drives the cover plate 22 to move upward. After releasing, the telescopic spring 25 drives the pedal 26 to return to its original position, and the cover plate 22 closes simultaneously.

[0054] It should be noted that the fall arrestor 13 in this application is an existing component in the field, so its working principle and technical mechanism will not be described in detail. At the same time, a locking strap can be provided above the mounting base plate 1. The locking strap is connected by a rope. When workers are performing maintenance, they can fix the locking strap to their body, which can further enhance the protective effect.

[0055] Working principle: When using this safety protection device for high-altitude maintenance of wind turbine units, first, fix the mounting base plate 1 to the external elevator or crane, fix the fall arrestor 13 by locking hook 15, and connect the fall arrestor rope 14 of the fall arrestor 13 to the connector 12 of the reinforcing rope 11 to form double fall protection. The protective side plate 2, the protective door assembly 3 and the protective back plate 4 form a closed protective space.

[0056] When small-area maintenance is required, rotate the threaded rod 8 on the protective back plate 4 to drive the guardrail 7 to slide along the guide rail 6 in the through groove 5, so that the maintenance position is aligned with the gap of the guardrail 7, without moving the lift.

[0057] Tools are categorized and stored between the partitions 17 of the toolbox 16. Stepping on the pedal 26 on the mounting base 1 causes the pedal 26 to move down along the guide rod 27 in the guide groove 24. Through the connecting rope 20 and the pulley assembly 19, the pedal moves the center block 21 of the cover plate 22, causing the cover plate 22 to move up along the guide frame 23, allowing the tools to be retrieved.

[0058] After releasing pedal 26, the telescopic spring 25 drives pedal 26 to return to its original position, and the connecting rope 20 pulls the cover plate 22 to close. The toolbox 16 and support plate 9 are detachable, facilitating maintenance and replenishment of tools, thereby completing a series of tasks. Content not described in detail in this specification constitutes prior art known to those skilled in the art.

[0059] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A safety protection device for high-altitude maintenance of wind turbine units, comprising a mounting base plate (1), a protective back plate (4), a support plate (9), a reinforcing rope (11), and a toolbox (16), wherein protective side plates (2) are installed on both the left and right sides of the upper surface of the mounting base plate (1), and protective door assemblies (3) and protective back plates (4) are respectively installed on the front and rear sides of the mounting base plate (1), characterized in that: The protective back plate (4) has a through groove (5), and a protective railing (7) is provided inside the through groove (5); Support plates (9) are installed on both the left and right sides of the upper surface of the mounting base plate (1), and a reinforcing rope (11) is installed above the support plate (9) via a connecting block (10). A connector (12) is installed on the reinforcing rope (11), and a fall arrester (13) is installed above the connector (12). Toolboxes (16) and support blocks (18) are installed on opposite sides of the support plate (9), and pulley assemblies (19) are installed on opposite sides of the support blocks (18). Connecting ropes (20) are installed on the pulley assemblies (19). A cover plate (22) is provided above the toolboxes (16). Pedals (26) are installed on the left and right sides of the upper surface of the mounting base plate (1) via telescopic springs (25).

2. The safety protection device for high-altitude maintenance of wind turbine units according to claim 1, characterized in that: Guide rails (6) are installed on both the left and right sides of the inside of the through groove (5), and the guardrail (7) is slidably connected to the guide rails (6).

3. The safety protection device for high-altitude maintenance of wind turbine units according to claim 2, characterized in that: A threaded rod (8) is installed on the protective back plate (4), and the lower end of the threaded rod (8) is connected to the guardrail (7) through a bearing seat.

4. The safety protection device for high-altitude maintenance of wind turbine units according to claim 1, characterized in that: The fall arrestor (13) is equipped with a fall arrestor rope (14), the lower end of which is connected to a connector (12), and a locking hook (15) is installed on the top of the fall arrestor (13).

5. The safety protection device for high-altitude maintenance of wind turbine units according to claim 1, characterized in that: The toolbox (16) is equipped with a partition plate (17) inside. The bottom of the toolbox (16) and the cover plate (22) are provided with through holes, through which the connecting rope (20) passes.

6. The safety protection device for high-altitude maintenance of wind turbine units according to claim 1, characterized in that: The support block (18) is located above the toolbox (16), and the toolbox (16) is detachably connected to the support plate (9).

7. The safety protection device for high-altitude maintenance of wind turbine units according to claim 1, characterized in that: A center block (21) is installed on the upper surface of the cover plate (22), and the upper part of the center block (21) is connected to the connecting rope (20).

8. The safety protection device for high-altitude maintenance of wind turbine units according to claim 7, characterized in that: A guide frame (23) is provided below the support block (18). The guide frame (23) is fixed on the support plate (9). The cover plate (22) passes through the guide frame (23) and is slidably connected to the guide frame (23).

9. The safety protection device for high-altitude maintenance of wind turbine units according to claim 1, characterized in that: The protective side plate (2) is provided with guide grooves (24), the pedal (26) is located in the guide grooves (24), and the upper surface of the pedal (26) is provided with anti-slip texture.

10. The safety protection device for high-altitude maintenance of wind turbine units according to claim 9, characterized in that: A guide rod (27) is installed inside the guide groove (24). The guide rod (27) passes through the pedal (26). The pedal (26) is slidably connected to the guide rod (27). The pedal (26) is connected to the lower front end of the connecting rope (20).

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