An assembled wind turbine nacelle

Abstract

The application belongs to the technical field of wind turbine nacelle, and discloses an assembled wind turbine nacelle, which comprises a bottom cabin, a first cabin cover and a second cabin cover arranged on the upper end of the two sides of the bottom cabin, a flange plate fixed to the left side of the bottom cabin, the first cabin cover and the second cabin cover being clamped on the upper end of the bottom cabin, a cabin door connected to the right upper end of the second cabin cover, an electric push rod connected to the lower end of the cabin door, a guide plate connected to the lower end of the second cabin cover, a limiting plate clamped on the inner wall of the bottom cabin, a clamping rod connected to the inner wall of the guide plate, a clamping groove formed in the inner wall of the limiting plate, and the clamping rod being clamped and matched with the clamping groove. The assembled wind turbine nacelle is provided with multiple structural designs, such as the pre-positioning matching of the pressing plate and the pressing groove, the guiding clamping of the guide plate and the limiting plate, and the automatic positioning of the clamping rod and the reset spring piece, so that the quick alignment and assembly of the bottom cabin, the first cabin cover, the second cabin cover and the components therebetween are realized, and the dislocation risk and the operation difficulty during the high-altitude hoisting and the on-site assembly are effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of wind turbine nacelle technology, specifically to an assembled wind turbine nacelle. Background Technology

[0002] As a clean and renewable green energy source, wind energy plays an increasingly important role in the global energy structure transformation. Wind turbines are mostly deployed in complex and harsh environments such as mountainous areas, coastal mudflats, remote plateaus, and even offshore areas. The nacelle integrates core precision components such as gearboxes, generators, and control systems, making it highly susceptible to erosion and damage from external wind, sand, rain, salt spray, extreme temperatures, and strong wind loads. As the core protective structure of the wind turbine nacelle, the nacelle not only needs to have excellent sealing and protective performance, but also needs to meet the practical requirements of on-site assembly, transportation, and subsequent inspection and maintenance. Its structural design directly determines the operational stability, service life, and maintenance costs of the wind turbine.

[0003] However, existing wind turbine nacelle covers still have some problems in use: An existing modular naval canopy, as described in Chinese Patent Application No. CN202120353993.6, includes a naval compartment. Two sets of protective covers are installed on the outer side of the naval compartment. A rear cabinet is installed at the rear end of each set of protective covers. Two sets of slide rails are installed on the outer side of each set of protective covers. A slider is installed on the outer side of adjacent slide rails. A silicone plate is installed on one side of each slider. A rubber layer is installed on the inner wall of each set of protective covers. A locking block is installed on both sides of the bottom end of one set of protective covers. A slot is opened at the top end of the other set of protective covers directly below the two locking blocks. A battery is installed inside one set of rear cabinets. Electrical wires are installed through the inner wall of the top end of the battery on both sides.

[0004] Although existing wind turbine units are designed for modular assembly, the assembly process still requires simultaneous hoisting, posing safety hazards to operators. To address the aforementioned issues, an innovative design was developed based on the existing modular wind turbine nacelle. Summary of the Invention

[0005] The purpose of this invention is to provide a modular wind turbine nacelle cover to solve the problem mentioned in the background art that the existing wind turbines, although designed as separate units, pose safety hazards to operators due to simultaneous assembly operations during hoisting.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an assembled wind turbine nacelle, comprising a bottom nacelle and a first nacelle cover and a second nacelle cover disposed on both sides of the upper end: A flange is fixed on the left side of the bottom compartment. The first and second hatch covers are engaged with the upper end of the bottom compartment. The upper right end of the second hatch cover is connected to the hatch door, and the lower end of the hatch door is connected to an electric push rod. The lower end of the second hatch is connected to a guide plate, the inner wall of the bottom compartment is engaged with a limiting plate, the inner wall of the guide plate is connected to a locking rod, the inner wall of the limiting plate is provided with a locking groove, and the locking rod engages with the locking groove.

[0007] Preferably, a pressure groove is provided on the upper right side of the first hatch cover, and a pressure plate is fixed on the left side of the second hatch cover. The pressure plate extends into the pressure groove and engages with the pressure groove. A bolt is connected to the upper end of the pressure plate, and the pressure plate and the pressure groove are fastened together by the bolt.

[0008] Using the above technical solution, the clamping plate and the clamping groove can achieve precise alignment and engagement of the first and second hatch covers. The structural design of the clamping plate embedded in the clamping groove plays a pre-positioning role, reducing assembly deviation. Then, the bolts are tightened to achieve double fixation, which effectively improves the structural stability and sealing of the connection between the two hatch covers, prevents the connection from loosening and the gap from widening due to vibration during the operation of the wind turbine, avoids the infiltration of external sand and rainwater, and simplifies the assembly and disassembly process of the two hatch covers, improving assembly efficiency.

[0009] Preferably, the hatch is hinged to the upper end of the second hatch cover, the hatch is rotatably connected to the upper end of the electric push rod, a bracket is fixed to the inner wall of the second hatch cover, and the lower end of the electric push rod is rotatably connected to the lower end of the bracket.

[0010] By adopting the above technical solution, the flexible opening and closing of the hatch is achieved through hinge connection, and the electric push rod replaces the traditional manual operation, improving the convenience of operation; the bracket provides stable support for the electric push rod, ensuring that the electric push rod drive process is smooth and reliable, and can keep the hatch stable at any opening angle, avoiding the hatch shaking or accidental closure in strong winds, eliminating safety hazards for high-altitude operations, and improving the convenience and safety of maintenance operations.

[0011] Preferably, two sets of limiting seats are fixed to the inner wall of the first hatch, and a connecting rod is rotatably connected in the middle of the limiting seats. The lower end of the connecting rod is designed in an "n" shape, and a limiting rod is installed at the lower end of the connecting rod. Sliding grooves are opened on both sides of the connecting rod, and the two ends of the limiting rod extend into the sliding grooves for sliding engagement. A bolt rod passes through the middle of the limiting rod, and the bolt rod is threadedly connected to the inner wall of the first hatch.

[0012] By adopting the above technical solution, the core components inside the first hatch can be flexibly limited and fixed through the cooperation of the limiting seat, connecting rod, limiting rod and bolt rod. The "n"-shaped design at the lower end of the connecting rod is adapted to the installation and sliding of the limiting rod. With the threaded connection between the threaded rod and the inner wall of the first hatch, the connection between the first hatch and the bottom compartment can be realized.

[0013] Preferably, the lower end of the connecting rod is designed with an inclined surface close to the inner side of the first hatch, and a limiting strip is fixed to the inner wall of the first hatch. The limiting strip contacts the inclined section of the lower end of the connecting rod, and the contact end between the limiting strip and the connecting rod is designed with an arc shape.

[0014] By adopting the above technical solution, the inclined surface design at the lower end of the connecting rod is matched with the arc-shaped contact end of the limiting strip. On the one hand, it can reduce the contact friction between the connecting rod and the limiting strip, avoid wear after long-term use of the components, and extend the service life. On the other hand, the inclined surface contact and arc transition can enable the limiting strip to play a more precise limiting role on the connecting rod. When the connecting rod continuously applies pressure to the limiting strip, it can improve the tightness of the connection between the first hatch and the bottom compartment.

[0015] Preferably, a sunroof is snapped onto the top of the first hatch cover, the sunroof is bolted to the first hatch cover, and a rubber gasket is connected at the connection between the sunroof and the first hatch cover; A heat dissipation grille is installed on the right side of the second hatch.

[0016] The above technical solution uses bolted connections and rubber gaskets, which not only allows for detachable installation of the skylight, facilitating lighting during later maintenance, but also enhances the sealing of the connection between the skylight and the first hatch cover through the rubber gaskets, effectively preventing rainwater and sand from seeping in. In addition, if the electric push rod malfunctions, the skylight can be opened to access the interior of the hatch. The heat dissipation grille uses a snap-fit ​​installation method, which is convenient to install and remove, and allows for quick cleaning of dust and debris from the grille surface, ensuring the heat dissipation effect inside the engine room and preventing internal equipment from malfunctioning due to overheating. This achieves a balance between sealing protection and heat dissipation functions.

[0017] Preferably, the guide plate is bolted to the second hatch cover, the lower end of the guide plate is triangular, the lower end of the guide plate is fitted with the limiting plate, the front end of the limiting plate is threaded through the fixing bolt, and the fixing bolt is connected to the inner wall of the second hatch cover.

[0018] The above technical solution utilizes the triangular design at the lower end of the guide plate to provide precise guidance, facilitating quick engagement and alignment between the guide plate and the limiting plate, reducing assembly difficulty and improving assembly efficiency. The fixing bolts securely connect the limiting plate to the inner wall of the second hatch cover. Combined with the engagement of the guide plate and the limiting plate, this reduces assembly difficulty when hoisting the second hatch cover and assembling it with the bottom compartment.

[0019] Preferably, the locking rod is slidably installed inside the guide plate, with a slide rail in the middle of the locking rod, through which the guide rod passes, and the guide rod slides in cooperation with the slide rail. A reset spring is connected to the middle of the guide plate, and the two sides of the reset spring are connected to the locking rod.

[0020] Using the above technical solution, the locking rod achieves precise sliding through the guide rod, and the reset spring can drive the locking rod to automatically engage with the locking groove of the limiting plate, realizing the rapid positioning and fixing of the guide plate and the limiting plate, simplifying the assembly process; after the second hatch cover engages with the bottom hatch, it can quickly achieve pre-positioning, ensuring structural reliability and avoiding safety hazards caused by misalignment or displacement of the second hatch cover during subsequent manual assembly.

[0021] Preferably, a positioning plate is provided inside the second hatch cover, with both ends of the positioning plate engaging with the second hatch cover and the bottom compartment respectively, and the positioning plate being bolted to both the second hatch cover and the bottom compartment.

[0022] The above technical solution is adopted, and the two ends of the positioning plate are respectively fastened to the second hatch cover and the bottom hatch with bolts to form a double fixation, which further strengthens the connection strength between the second hatch cover and the bottom hatch and effectively disperses the wind load and vibration load on the cabin during operation. At the same time, the positioning plate plays an auxiliary positioning role, ensuring the flatness and alignment accuracy of the second hatch cover and the bottom hatch during assembly, avoiding cabin structure deformation, and improving the overall structural stability and service life of the cabin cover.

[0023] Compared with existing technologies, the beneficial effects of this invention are as follows: This modular wind turbine nacelle, through multiple structural designs such as the pre-positioning and matching of the pressure plate and pressure groove, the guiding engagement of the guide plate and the limiting plate, and the automatic positioning of the engagement rod and the reset spring, achieves rapid alignment and assembly between the nacelle, the first nacelle cover, the second nacelle cover, and various components, effectively reducing the risk of misalignment and operational difficulty during high-altitude hoisting and on-site assembly; at the same time, most components adopt detachable structures such as bolted connections and snap-fit ​​connections, combined with electrically driven doors, detachable skylights, and heat dissipation grilles, which not only simplifies the assembly and disassembly process, but also provides convenience for later internal component inspection, equipment maintenance, and replacement of vulnerable parts, significantly improving operation and maintenance efficiency and reducing labor and time costs.

[0024] 1. The bolt fastening of the pressure plate and pressure groove, the double fixing of the positioning plate, and the precise positioning of the connecting rod and limit strip effectively strengthen the strength of each connection part of the nacelle. This effectively disperses the alternating wind load and equipment vibration load experienced by the wind turbine during operation, preventing displacement, loosening, or deformation of the nacelle. At the same time, the rubber gaskets at the skylight connection and the sealing fit of each latch and bolt connection effectively prevent external wind, sand, rain, salt spray, and other impurities from seeping into the nacelle, protecting the internal core precision components from corrosion. Combined with the efficient heat dissipation of the heat dissipation grille, this prevents equipment failure due to overheating, further improving the stability and reliability of the wind turbine operation and extending the service life of the nacelle and the equipment inside the nacelle. 2. The adjustable design of the connecting rod and limit rod improves the tightness of the connection between the hull cover and the nacelle; the electrically driven door can stably maintain any opening angle, avoiding door swaying and accidental closure in strong winds, eliminating safety hazards in high-altitude maintenance operations, and improving operational safety; the synergistic effect of the positioning plate, limit plate, guide plate and other structures further enhances the overall load-bearing capacity and vibration resistance of the hull cover, enabling it to adapt to complex and harsh operating environments such as mountainous areas and coastal mudflats, ensuring that the hull cover can stably perform its protective function for a long time, and providing reliable protection for the safe and efficient operation of wind turbine units. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall split structure of the present invention; Figure 3 This is a schematic diagram of the bottom compartment and the first hatch structure of the present invention; Figure 4 This is a schematic diagram of the first hatch and sunroof structure of the present invention; Figure 5 This is a schematic diagram of the limiting seat and connecting rod structure of the present invention; Figure 6 This is a schematic diagram of the second hatch and door structure of the present invention; Figure 7 This is a schematic diagram of the second hatch cover and pressure plate structure of the present invention; Figure 8 This is a schematic diagram of the limiting plate and guide plate structure of the present invention; Figure 9 This is a schematic diagram of the locking rod and guide rod structure of the present invention; Figure 10 This is a schematic diagram of the limiting plate and engaging groove structure of the present invention.

[0026] In the diagram: 1. Bottom compartment; 2. Flange; 3. First hatch cover; 4. Skylight; 5. Second hatch cover; 6. Pressure groove; 7. Pressure plate; 8. Hatch door; 9. Bracket; 10. Electric push rod; 11. Radiator grille; 12. Limiting seat; 13. Connecting rod; 14. Bolt rod; 15. Limiting rod; 16. Limiting strip; 17. Positioning plate; 18. Limiting plate; 19. Guide plate; 20. Engaging rod; 21. Engaging groove; 22. Fixing bolt; 23. Reset spring; 24. Guide rod. Detailed Implementation

[0027] 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.

[0028] Please see Figure 1-10 This invention provides a technical solution: an assembled wind turbine nacelle, comprising a nacelle 1 and a first nacelle cover 3 and a second nacelle cover 5 arranged on both sides of the upper end. A flange 2 is fixed to the left side of the nacelle 1, and the first nacelle cover 3 and the second nacelle cover 5 are engaged with the upper end of the nacelle 1. The core structure of this assembled wind turbine nacelle includes the nacelle 1 and the first nacelle cover 3 and the second nacelle cover 5 symmetrically arranged on both sides of the upper end. Each component adopts a modular design, which facilitates transportation, hoisting and on-site assembly, and is suitable for the actual needs of wind turbine installation in the field. Among them, the flange 2 is integrally formed and fixed on the left side of the nacelle 1. The flange 2 is used to realize the stable connection between the entire nacelle and the wind turbine tower or other connecting components. The surface of the flange 2 has pre-set evenly distributed connection holes. High-strength bolts pass through the connection holes to realize the overall fixation of the nacelle, ensuring that the nacelle will not shift or shake in strong wind environments, and ensuring the reliability of the connection. During assembly, the nacelle 1 is first placed stably and fixed to the corresponding parts of the wind turbine. Then, the first cover 3 and the second cover 5 are respectively snapped into the pre-set snapping position on the upper end of the nacelle 1 from top to bottom, so as to achieve the initial positioning of the nacelle 1 and the two covers, laying the foundation for subsequent precise assembly.

[0029] The upper right side of the second hatch 5 is connected to the hatch door 8, and the lower end of the hatch door 8 is connected to the electric push rod 10. The hatch door 8 is hinged to the upper end of the second hatch 5, and the hatch door 8 is rotatably connected to the upper end of the electric push rod 10. A bracket 9 is fixed to the inner wall of the second hatch 5, and the lower end of the electric push rod 10 is rotatably connected to the lower end of the bracket 9. The top of the first hatch 3 is fitted with a skylight 4, which is bolted to the first hatch 3. A rubber gasket is connected at the connection between the skylight 4 and the first hatch 3. The right side of the second hatch 5 is fitted with a heat dissipation grille 11. The upper end of the second hatch 5 is rotatably connected to the hatch door 8. The opening and closing of the hatch door 8 is controlled by the electric push rod 10, and the lower end of the electric push rod 10 is connected to the hatch door 8 through the bracket 9. When the electric push rod 10 extends or retracts, it can drive the hatch door 8 to rotate around the connection point with the second hatch 5. The electric push rod 10 controls the opening and closing of the hatch door 8, which improves the convenience of maintenance operations. The heat dissipation grille 11 installed on the side of the second hatch 5 facilitates air circulation. Meanwhile, a skylight 4 is bolted to the upper end of the first hatch cover 3. The skylight 4 is bolted and equipped with a rubber gasket, which not only allows the skylight 4 to be detached and installed, facilitating lighting during later maintenance, but also enhances the sealing of the connection between the skylight 4 and the first hatch cover 3 through the rubber gasket, effectively preventing rainwater and sand from seeping in. In addition, when the electric push rod 10 malfunctions and the hatch door 8 cannot be opened, the skylight 4 can be opened for emergency access to the inside of the hatch.

[0030] A pressure groove 6 is provided on the upper right side of the first hatch cover 3. A pressure plate 7 is fixed to the left end of the second hatch cover 5. The pressure plate 7 extends into the pressure groove 6 and engages with the pressure groove 6. Bolts are connected to the upper end of the pressure plate 7, and the pressure plate 7 and the pressure groove 6 are fastened together with the bolts. During hatch cover assembly, the first hatch cover 3 is first hoisted and engaged with the bottom hatch 1. Then, the second hatch cover 5 is assembled. The left side of the second hatch cover 5 presses against the right side of the first hatch cover 3. A sealing strip is provided at the press cover, and the left end of the second hatch cover 5 is connected to the pressure plate 7. The pressure plate 7 can cooperate with the pressure groove 6 and is fastened to the first hatch cover 3 and the second hatch cover 5 with bolts, improving installation stability and sealing.

[0031] Two sets of limiting seats 12 are fixed to the inner wall of the first hatch cover 3. A connecting rod 13 is rotatably connected to the middle of the limiting seat 12. The lower end of the connecting rod 13 has an "n" shape design. A limiting rod 15 is installed at the lower end of the connecting rod 13. Sliding grooves are opened on both sides of the connecting rod 13. The two ends of the limiting rod 15 extend into the sliding grooves for sliding fit. A bolt rod 14 passes through the middle of the limiting rod 15. The bolt rod 14 is threaded to the inner wall of the first hatch cover 3. The lower end of the connecting rod 13 is designed with an inclined surface close to the inner side of the first hatch cover 3. A limiting strip 16 is fixed to the inner wall of the first hatch cover 3. The limiting strip 16 contacts the inclined section of the lower end of the connecting rod 13, and the contact end of the limiting strip 16 with the connecting rod 13 has an arc-shaped design. When the first hatch cover 3 is hoisted and assembled with the bottom hatch 1, the left side of the first hatch cover 3 is adapted to the shape of the left flange 2 of the bottom hatch 1. After engagement, it can prevent the first hatch cover 3 from shifting. After splicing, the bolt rod 14, which runs through the middle of the limiting rod 15, is further connected to the inner wall of the bottom compartment 1. When the bolt rod 14 is connected to the inner wall of the bottom compartment 1, the lower inclined section of the connecting rod 13 contacts the limiting strip 16. As the connecting rod 13 gradually applies pressure to the limiting strip 16, it can pull down the first hatch cover 3, increase the downward pressure applied by the first hatch cover 3 to the bottom compartment 1, and improve the connection sealing.

[0032] The lower end of the second hatch cover 5 is connected to a guide plate 19. A limiting plate 18 is engaged with the inner wall of the bottom compartment 1. A locking rod 20 is connected to the inner wall of the guide plate 19. A locking groove 21 is opened on the inner wall of the limiting plate 18. The locking rod 20 engages with the locking groove 21. The guide plate 19 is bolted to the second hatch cover 5. The lower end of the guide plate 19 has a triangular design. The lower end of the guide plate 19 engages with the limiting plate 18. A fixing bolt 22 passes through the front end of the limiting plate 18. The fixing bolt 22 is connected to the inner wall of the second hatch cover 5. The locking rod 20 is slidably installed inside the guide plate 19. A slide rail is opened in the middle of the locking rod 20. A guide rod 24 passes through the middle of the slide rail. The guide rod 24 engages with the slide rail. A reset spring 23 is connected to the middle of the guide plate 19. The two sides of the reset spring 23 are connected to the locking rod 20. The second hatch cover 5 has a positioning plate 17 inside. The two ends of the positioning plate 17 engage with the second hatch cover 5 and the bottom compartment 1 respectively, and the positioning plate 17 is bolted to both the second hatch cover 5 and the bottom compartment 1. During assembly of the second hatch cover 5 and the bottom compartment 1, the triangular-designed guide plate 19 improves guidance, facilitating easier and more precise engagement of the second hatch cover 5 and the bottom compartment 1. Simultaneously, the guide plate 19, after engaging with the limiting plate 18, further prevents the second hatch cover 5 from shifting, improving operational safety during further tightening. The limiting plate 18 is bolted to the inner wall of the bottom compartment 1. During the engagement of the guide plate 19 and the limiting plate 18, the limiting plate 18 first pushes the engaging rod 20 to retract into the guide plate 19. After the guide plate 19 and the limiting plate 18 are engaged in place, the reset spring 23 pushes the engaging rod 20 outward to reset. The engaging rod 20 extends into the engaging groove 21, thereby achieving the pre-fixation of the second hatch cover 5 and the bottom compartment 1. This ensures the safety of the operators during subsequent further fixing and avoids the danger caused by the collapse of the second hatch cover 5 due to displacement or other reasons. After the second hatch cover 5 and the bottom compartment 1 are pre-fixed, the operators enter the bottom compartment 1 and further tighten the second hatch cover 5 and the bottom compartment 1 using bolts and the positioning plate 17.

[0033] The contents not described in detail in this specification are prior art known to those skilled in the art. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A modular wind turbine nacelle, comprising a nacelle (1) and a first nacelle cover (3) and a second nacelle cover (5) disposed on both sides of the upper end, characterized in that: A flange (2) is fixed on the left side of the bottom compartment (1). The first hatch cover (3) and the second hatch cover (5) are engaged at the upper end of the bottom compartment (1). The upper right end of the second hatch cover (5) is connected to the hatch door (8), and the lower end of the hatch door (8) is connected to the electric push rod (10). The lower end of the second hatch cover (5) is connected to a guide plate (19), the inner wall of the bottom compartment (1) is engaged with a limiting plate (18), the inner wall of the guide plate (19) is connected to a locking rod (20), the inner wall of the limiting plate (18) is provided with a locking groove (21), and the locking rod (20) engages with the locking groove (21).

2. The assembled wind turbine nacelle cover according to claim 1, characterized in that: The first hatch (3) has a pressure groove (6) on the upper right side. The second hatch (5) has a pressure plate (7) fixed on the left side. The pressure plate (7) extends into the pressure groove (6). The pressure plate (7) engages with the pressure groove (6). The upper end of the pressure plate (7) is connected with bolts. The pressure plate (7) and the pressure groove (6) are fastened by bolts.

3. The assembled wind turbine nacelle cover according to claim 1, characterized in that: The hatch (8) is hinged to the upper end of the second hatch cover (5), and the hatch (8) is rotatably connected to the upper end of the electric push rod (10). A bracket (9) is fixed on the inner wall of the second hatch cover (5), and the lower end of the electric push rod (10) is rotatably connected to the lower end of the bracket (9).

4. The assembled wind turbine nacelle cover according to claim 1, characterized in that: Two sets of limiting seats (12) are fixed to the inner wall of the first hatch (3). The middle of the limiting seat (12) is rotatably connected to the connecting rod (13). The lower end of the connecting rod (13) is designed in an "n" shape. The lower end of the connecting rod (13) is equipped with a limiting rod (15). The connecting rod (13) has sliding grooves on both sides. The two ends of the limiting rod (15) extend into the sliding grooves for sliding cooperation. The middle of the limiting rod (15) is through a bolt rod (14). The bolt rod (14) is threadedly connected to the inner wall of the first hatch (3).

5. The assembled wind turbine nacelle cover according to claim 4, characterized in that: The lower end of the connecting rod (13) is close to the inner side of the first hatch (3) and has a sloping design. The inner wall of the first hatch (3) is fixed with a limiting strip (16). The limiting strip (16) contacts the sloping section at the lower end of the connecting rod (13), and the contact end between the limiting strip (16) and the connecting rod (13) has an arc-shaped design.

6. The assembled wind turbine nacelle cover according to claim 1, characterized in that: A skylight (4) is fitted onto the top of the first hatch (3), and the skylight (4) is bolted to the first hatch (3). A rubber gasket is connected at the connection between the skylight (4) and the first hatch (3). The second hatch (5) has a heat dissipation grille (11) installed on its right side.

7. The assembled wind turbine nacelle cover according to claim 1, characterized in that: The guide plate (19) is bolted to the second hatch cover (5). The lower end of the guide plate (19) is triangular. The lower end of the guide plate (19) fits into the limiting plate (18). The front end of the limiting plate (18) is connected to the fixing bolt (22). The fixing bolt (22) is connected to the inner wall of the second hatch cover (5).

8. The assembled wind turbine nacelle cover according to claim 1, characterized in that: The locking rod (20) is slidably installed inside the guide plate (19). A slide is opened in the middle of the locking rod (20), and the guide rod (24) passes through the middle of the slide. The guide rod (24) slides with the slide. The middle of the guide plate (19) is connected to the reset spring (23), and the two sides of the reset spring (23) are connected to the locking rod (20).

9. The assembled wind turbine nacelle cover according to claim 1, characterized in that: The second hatch (5) is provided with a positioning plate (17) inside. The two ends of the positioning plate (17) are respectively engaged with the second hatch (5) and the bottom compartment (1), and the positioning plate (17) is bolted to the second hatch (5) and the bottom compartment (1).

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