A wind turbine nacelle with a self-locking cover using a telescopic pull rod

Abstract

The present application relates to the technical field of wind turbine nacelle, in particular to a wind turbine nacelle cover with telescopic pull rod self-locking cover shell, comprising a fan nacelle and a cover head shell, an electric control signal controlled locking system, the length of the telescopic connecting rod is adjusted manually to ensure the sealing connection between the cover shell and the fan nacelle. The electric control system triggers through the electric signal between the electrode jack and the plug rod, starts the action of the electric drive rod, drives the deflection of the driving ring and the moving ring seat, and accurately completes the unfolding of the locking piece and the locking of the flange ring seat. The system not only simplifies the operation process, but also improves the reliability and stability of the locking through high-precision electric control driving. In addition, the efficient response of the electric control system ensures that the wind turbine cover can adapt to complex working environment, prevent external interference and prolong the service life of the equipment. The present application effectively solves the problems of loose operation and inconvenience of traditional mechanical locking device, and provides a more intelligent, convenient and stable wind turbine nacelle cover.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind turbine nacelle, in particular to a wind turbine nacelle cover using a telescopic pull rod self-locking cover shell. BACKGROUND

[0002] The wind turbine nacelle cover is an important protective structure of the wind turbine generator set, which mainly functions to cover and protect the generator set, transmission system and control equipment inside the nacelle, avoid the adverse effects of external environment such as wind, rain, dust, salt mist, etc. on them, and maintain the sealing and temperature stability of the nacelle. The connection firmness and sealing performance of the nacelle cover directly affect the operation safety and equipment life of the wind turbine.

[0003] In the prior art, the connection between the nacelle and the cover head shell usually adopts the way of setting flanges on the outer sides of both, and fastening and connecting the flanges through uniformly distributed bolts. This kind of flange + bolt structure is widely used due to its mature processing technology and high structural strength. However, under long-term operation and complex climate conditions, this connection mode still has some problems that cannot be ignored.

[0004] Firstly, during the long-term operation of the wind turbine generator set, the nacelle is affected by continuous wind load, mechanical vibration and diurnal temperature variation, and the bolt connection part is prone to pre-tightening force attenuation or loosening. Once the connection is loose, the sealing performance between the cover shell and the nacelle will decrease, and structural gaps will be generated, through which rainwater and dust may enter the nacelle, thereby causing problems such as equipment corrosion, insulation performance degradation, control system failure, etc., which seriously affect the operation stability and life of the wind turbine.

[0005] Secondly, the traditional bolt connection needs to fasten or loosen all the bolts one by one during installation and disassembly, which is tedious and time-consuming. In the maintenance scene of offshore wind power or high-altitude wind turbine, this mode not only has low efficiency, but also has high operation safety risk. In addition, the pre-tightening force of the bolt lock depends on manual force and construction conditions, and there is a situation that the locking torque is inconsistent, which may cause local connection to be not firm or even fail.

[0006] Therefore, the present application is developed to solve the above-mentioned problems in the prior art. SUMMARY

[0007] The present application aims to solve one of the problems in the prior art or related art.

[0008] To this end, the technical scheme adopted by the present application is as follows: a wind turbine nacelle cover using a telescopic pull rod self-locking cover shell, comprising: a wind turbine nacelle and a cover head shell; an outer buckle fixed to the outer periphery of the wind turbine nacelle and the cover head shell, and an engagement lock fixed to one end of the cover head shell; one end of the cover head shell is fixedly connected with a flange ring seat;

[0009] The outer buckle comprises a foot plate, a buckle foot plate, a buckle handle and a connecting rod; the surface of the foot plate is provided with a hooking foot; one end of the connecting rod is movably connected to the surface of the buckle handle, and the other end of the connecting rod is provided with a sleeve ring for connecting with the hooking foot; the foot plate and the buckle foot plate are fixed to the surface of the cover head shell and the fan cabin respectively, and the surfaces of the buckle foot plate and the buckle handle are respectively provided with an electrode insertion hole and an electrode insertion rod; the ends of the electrode insertion rod and the electrode insertion hole are connected with electrodes for connecting the control signal input of the locking piece;

[0010] The locking piece comprises a fixed ring seat, a driving ring, a movable ring seat and a plurality of locking pieces; a plurality of electric driving rods for driving the movement of the driving ring are fixedly installed on the surface of the fixed ring seat; a plurality of linear sliding grooves and arc sliding grooves are respectively arranged on the surfaces of the fixed ring seat and the movable ring seat; a plurality of spiral sliding grooves are arranged on the outer periphery of the driving ring, and the inner side of the movable ring seat is provided with a sliding pin which is in sliding abutment with the surface of the spiral sliding groove; the surface of the locking piece is provided with a sliding convex which is sleeved in the inner side of the arc sliding groove, and the surface of the locking piece is also provided with a sliding convex which is sleeved in the inner side of the linear sliding groove;

[0011] The movable ring seat is rotatably installed on the surface of the fixed ring seat and sleeved on the outer periphery of the driving ring; the locking piece is connected and locked with the inner side of the flange ring seat by sliding and deflection movement, so as to complete the connection and locking of the locking piece and the flange ring seat. Through the combination of the outer buckle and the locking piece, the firm connection between the fan cabin and the cover head shell is ensured, and when the wind turbine cabin is impacted by external impact or wind fluctuation, the airtightness of the cover shell and the cabin body can be effectively maintained. The electric control driving system provides higher precision and response speed, effectively solves the problems of looseness and inaccuracy that may exist in traditional mechanical locking, and improves the reliability and stability of the whole system.

[0012] In a preferred example, the buckle handle is rotatably installed on the surface of the buckle foot plate, one end of the connecting rod is connected to the surface of the buckle handle, and the connection position is arranged offset relative to the rotation axis between the buckle handle and the buckle foot plate. Since the connection point of the connecting rod is not on the rotation axis of the buckle handle, but is offset, the buckle handle can produce greater linear displacement when rotating, reducing the force during operation and improving the efficiency of unlocking and locking. The connecting rod comprises a screw rod and a screw sleeve pipe, forming a telescopic rod structure, for adjusting the length of the connecting rod to adapt to the connection distance between the fan cabin and the cover head shell. By designing the adjustable connecting rod, the connection distance between the cover head shell and the fan cabin can be adjusted according to the size requirements of different wind turbine cabins, simplifying the installation process and improving the adaptability, so that the wind turbine cover can be stably used in different environments and conditions.

[0013] The application can be further configured in a preferred example that the inner side of the buckle handle is provided with a spherical groove, and the end of the connecting rod is provided with a ball head and is rotatably sleeved in the inner side of the spherical groove of the buckle handle. Through the design of the spherical groove and the ball head, the connection between the buckle handle and the connecting rod is more flexible, can withstand greater force and provide higher stability, avoids the jamming or damage problems that may occur in the traditional mechanical connection mode, and improves the stability and durability of the system.

[0014] The application can be further configured in a preferred example that the electrode insertion rod is movably mounted on the surface of the buckle handle, and a spring is sleeved on the surface, and the electrode insertion hole and the electrode insertion rod are metal members, which are used to form an electrical signal output through electrode connection when the two are connected. The movably mounted electrode insertion rod and the spring ensure the stability of the electrode contact, ensure the reliable connection between the electrode insertion rod and the insertion hole, and the accurate transmission of the electrical signal makes the locking and starting actions more flexible and efficient, reduces the friction and wear of the mechanical connection, and prolongs the service life of the system.

[0015] The application can be further configured in a preferred example that the spiral sliding groove and the sliding pin are arranged one by one, and the spiral sliding groove is in the shape of a spiral strip. The cooperation of the spiral sliding groove and the sliding pin improves the movement accuracy between the driving ring and the driven ring seat, so that the locking piece can more accurately complete the locking action. This design effectively reduces the wear of the system and improves the stability and reliability of the operation.

[0016] The application can be further configured in a preferred example that the arc sliding groove and the line sliding groove are arranged one by one with the sliding convex and the sliding convex respectively, the line sliding groove is arranged along the tangent straight line on the surface of the fixed ring seat, the arc sliding groove is in the shape of an arc, and the two ends of the arc sliding groove are close to and away from the center of the driven ring seat respectively. Through the accurate cooperation of the sliding groove and the sliding convex, the deflection of the locking piece is more stable and accurate, and the jamming phenomenon that may occur in the traditional structure is avoided. This design greatly improves the accuracy and response speed of the locking action, and improves the reliability and working efficiency of the system.

[0017] The application can be further configured in a preferred example that the plurality of locking pieces are uniformly distributed in the circumferential direction, and one side of the locking piece is in the shape of an inclined plane for sliding abutment with the inner side of the flange ring seat. The uniform distribution and inclined plane design of the locking piece make the locking piece more evenly distribute the pressure, reduce local wear, and improve the contact stability with the inner side of the flange ring seat during the locking process, ensuring the sealing and firmness of the cover and the cabin body.

[0018] The application can be further configured in a preferred example that the input end of the electric driving rod is electrically connected with a control module, and the input end of the control module is electrically connected with the electrode socket and the end of the electrode plug rod. The introduction of the control module enables the action of the electric driving rod to be accurately adjusted according to the electrical signals of the electrode socket and the electrode plug rod. The efficient response of the control module ensures the accuracy of the locking and starting actions, improves the intelligent degree of the system, and enhances the convenience and stability of the operation.

[0019] The wind turbine cabin provided by the application can ensure the structural stability while improving the operation accuracy and sealing performance by adopting the telescopic pull rod self-locking shell design, electric control driving control and precise locking mechanism. The system integration design not only simplifies the operation process, but also reduces the defects and maintenance costs of the traditional mechanical structure, greatly improving the overall reliability and working efficiency of the wind turbine.

[0020] The application has the following beneficial effects:

[0021] 1. In the application, the connection between the fan cabin and the cover head shell is more firm through the cooperative action of the outer buckle and the joint lock, avoiding the loose connection in the traditional way. The joint lock can fully abut the inner side of the flange ring seat during the locking process, realizing reliable locking and enhancing the stability of the structure. Especially when the wind turbine cabin is impacted by external impact or wind fluctuation, the sealing performance of the cover shell and the cabin body can be effectively maintained.

[0022] 2. In the application, the electrical signal input function of the electrode socket and the electrode plug rod realizes the double control of the buckle lock and the joint lock, which has higher accuracy and response speed compared with the traditional mechanical locking method. The electric control system can accurately execute the locking and starting actions according to the input electrical signal, avoiding the problem of inaccurate locking or starting failure caused by mechanical structure error, and enhancing the reliability of the overall system.

[0023] 3. In the application, the plurality of lock plates are uniformly distributed and obliquely abut the flange ring seat, ensuring uniform contact and stable sealing performance during the locking process, reducing the risk of rainwater and dust entering the cabin, and reducing stress concentration during installation, reducing the risk of structural fatigue and damage, and prolonging the service life. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the application;

[0025] Figure 2 It is a schematic diagram of the internal structure of the fan cabin and the cover head shell of an embodiment of the application;

[0026] Figure 3Fig. 1 is a schematic view of a cover head shell and engagement lock structure according to an embodiment of the present application;

[0027] Figure 4 Fig. 2 is a schematic view of an engagement lock and flange ring seat structure according to an embodiment of the present application;

[0028] Figure 5 Fig. 3 is a schematic view of an engagement lock exploded structure according to an embodiment of the present application;

[0029] Figure 6 Fig. 4 is a schematic view of a lock piece structure according to an embodiment of the present application;

[0030] Figure 7 Fig. 5 is a schematic view of an outer buckle structure according to an embodiment of the present application;

[0031] Figure 8 Fig. 6 is a schematic view of an outer buckle engaged state structure according to an embodiment of the present application.

[0032] Reference signs:

[0033] 100, fan cabin; 110, cover head shell; 120, flange ring seat;

[0034] 200, outer buckle; 210, foot plate; 220, buckle foot plate; 230, buckle handle; 240, connecting rod; 211, hook foot; 221, electrode insertion hole; 232, electrode insertion rod; 241, sleeve ring;

[0035] 300, engagement lock; 310, fixed ring seat; 320, driving ring; 330, movable ring seat; 340, lock piece; 311, wire sliding groove; 321, electric driving rod; 322, screw sliding groove; 331, arc sliding groove; 332, sliding pin; 341, sliding convex; 342, shaft pin. DETAILED DESCRIPTION

[0036] In order to make the objects, technical solutions and advantages of the present application clearer, further detailed description will be made to the present application with reference to the specific embodiments and the accompanying drawings. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0037] It is to be understood that the above description is only exemplary and is not intended to limit the scope of the present application.

[0038] The accompanying drawings are referred to in the following description of the present application. Figures 1 to 8 Some embodiments of the present application provide a wind turbine cabin cover using a telescopic pull rod self-locking cover shell.

[0039] Embodiment 1: basic structure and operation process

[0040] Figure 1The overall structure of the wind turbine nacelle with the telescopic pull rod self-locking cover of the application is shown, Figures 2 to 8 Detailed views of different structural components are shown. The technical solution in this embodiment includes the following main parts:

[0041] The fixed connection between the fan nacelle 100 and the cover head shell 110

[0042] In this embodiment, the fan nacelle 100 and the cover head shell 110 are connected through the outer fastener 200. The outer fastener 200 includes a foot plate 210, a fastening foot plate 220, a fastening handle 230, and a connecting rod 240. The foot plate 210 and the fastening foot plate 220 are fixed to the surfaces of the cover head shell 110 and the fan nacelle 100, respectively. The fastening handle 230 is movably connected to the foot plate 210 through the connecting rod 240. The length of the connecting rod 240 can be adjusted by a screw and a sleeve pipe, so as to adapt to the connection spacing between different fan nacelles 100 and cover head shells 110.

[0043] The electrical signal input of the electrode insertion hole 221 and the electrode insertion rod 232

[0044] In this embodiment, the surfaces of the fastening foot plate 220 and the fastening handle 230 are respectively provided with the electrode insertion hole 221 and the electrode insertion rod 232. These two parts form an electrical signal input through electrode connection, which controls the action of the joint locking piece 300. The electrode insertion hole 221 and the electrode insertion rod 232 are both metal components. The input of the electrical signal triggers the control module to adjust the joint locking piece 300. The fastening handle 230 is rotatably installed on the surface of the fastening foot plate 220. One end of the connecting rod 240 is connected to the surface of the fastening handle 230, and the connection position is offset relative to the rotation axis between the fastening handle 230 and the fastening foot plate 220. The fastening handle is rotatably installed on the surface of the fastening foot plate, and the connection point of the connecting rod and the surface of the fastening handle is offset from the connection axis of the fastening handle and the fastening foot plate. Since the connection point of the connecting rod is not on the rotation axis of the fastening handle, but is offset, the fastening handle can produce greater linear displacement to the connecting rod when it rotates, reducing the force during operation and improving the efficiency of unlocking and locking.

[0045] The structure and working principle of the joint locking piece 300

[0046] The engagement lock 300 comprises a fixed ring seat 310, a driving ring 320, a movable ring seat 330 and a plurality of locking pieces 340. The surface of the fixed ring seat 310 is fixedly installed with an electric driving rod 321 for driving the driving ring 320 to move. The outer periphery of the driving ring 320 is provided with a plurality of spiral sliding grooves 322, and the inner side of the movable ring seat 330 is provided with sliding pins 332 that slide against the surface of the spiral sliding grooves 322. The surface of the locking piece 340 is provided with a sliding convex 341 that is sleeved in the inner side of the arc sliding groove 331, and the surface of the locking piece 340 is also provided with a sliding convex 341 that is sleeved in the inner side of the linear sliding groove 311. The movable ring seat 330 is rotationally installed on the surface of the fixed ring seat 310 and is sleeved on the outer periphery of the driving ring 320. When the electric driving rod 321 inputs an electric signal, the driving ring 320 moves axially to drive the movable ring seat 330 to perform a deflection movement, and the locking piece 340 realizes the abutting locking of the inner side of the flange ring seat 120 through sliding and deflection movement, thereby completing the connection and locking of the engagement lock 300 and the flange ring seat 120.

[0047] Embodiment 2: Optimization design of spherical groove and ball head

[0048] This embodiment is similar to embodiment 1, and the main difference is that the connection design between the buckle 230 and the connecting rod 240 is optimized.

[0049] Spherical groove and ball head connection structure

[0050] In this embodiment, the inner side of the buckle 230 is provided with a spherical groove, and the end of the connecting rod 240 is provided with a ball head and is rotationally sleeved in the inner side of the spherical groove of the buckle 230. This design makes the connection between the buckle 230 and the connecting rod 240 more flexible, can withstand greater force and provide higher stability. Through the design of the ball head and the spherical groove, the buckle 230 and the connecting rod 240 can be adjusted more smoothly, avoiding the jamming problem that may occur in the traditional connection mode.

[0051] Electrode connection and spring design

[0052] The electrode insertion rod 232 is movably installed on the surface of the buckle 230 and is sleeved with a spring. The electrode insertion hole 221 and the electrode insertion rod 232 are both metal components, and the electrode insertion rod 232 can stably contact the electrode insertion hole 221 during the engagement process through the action of the spring, ensuring that the two can form an electrical signal connection and control the action of the engagement lock 300 through the electrical signal to complete the locking.

[0053] In this embodiment, the surface of the foot plate 210 is provided with a plurality of hooks 211, which are hook-shaped structures protruding outwardly towards the cover head shell 110, and are used to interlock with the collar 241 at the end of the connecting rod 240, so as to quickly fix and connect the cover head shell 110 and the fan cabin 100 after the rotation operation of the buckle 230 is completed. The hook 211 ensures the stability and reliability of the outer buckle 200 during the connection process through mechanical clamping.

[0054] Operation flow

[0055] In this embodiment, by adjusting the length of the connecting rod 240, the connection distance between the fan cabin 100 and the cover head shell 110 can be accurately controlled. At the same time, the operation of the electrode signal input control system drives the linear motion of the driving ring 320 through the driving of the electric driving rod 321, thereby driving the deflection of the driving ring seat 330, and the locking plate 340 completes the locking action inside the flange ring seat 120.

[0056] One end of the connecting rod 240 is provided with a collar 241, which is an open metal ring structure, and a limiting inclined surface is arranged at the opening, so as to be slidably hung on the hook 211 on the foot plate 210 during the operation of the buckle 230. This structure can realize self-adaptive clamping when the cover head shell 110 and the fan cabin 100 are assembled, and provide axial locking force after the connection is completed, thereby enhancing the anti-vibration performance of the overall structure.

[0057] Embodiment 3: Integration of electric driving system and control module

[0058] This embodiment optimizes the integration of the electric driving system and the control module, and improves the response speed and accuracy of the system.

[0059] Connection of control module and electric driving rod 321: In this embodiment, the electric driving rod 321 is connected with the control module, and the electric signal input from the electrode plug rod 232 and the electrode socket 221 is received by the control module. The control module accurately adjusts the action of the electric driving rod 321 according to the input of the electric signal, thereby controlling the linear motion of the driving ring 320 and driving the deflection motion of the driving ring seat 330. Through this accurate control, the locking plate 340 can complete the locking operation with very high precision.

[0060] Real-time feedback and optimization: In this embodiment, a plurality of sensors are arranged on the driving ring 320 for real-time monitoring of the motion state. The motion information fed back by the sensors is transmitted to the control module, and the control module adjusts the working state of the electric driving rod 321 in real time according to the feedback signal, optimizes the motion process of the locking plate 340, and further improves the response speed and operation accuracy of the system.

[0061] Locking piece 340 structure optimization: the contact surface between the movable ring seat 330 and the fixed ring seat 310 is optimized to make the movement of the locking piece 340 more stable, reduce the friction that may be generated during movement, and prolong the service life of the device.

[0062] In this embodiment, the surface of the locking piece 340 is provided with a shaft pin 342, which is a short cylindrical structure installed in the proximal region of the locking piece 340 and slidingly fitted inside the arc sliding groove 331 on the surface of the movable ring seat 330. The two ends of the arc sliding groove 331 are different distances from the center of the movable ring seat 330, and under the double guidance of the arc sliding groove 331 and the linear sliding groove 311, the locking piece 340 is simultaneously deflected and radially moved; through the sliding fit between the shaft pin 342 and the arc sliding groove 331, the locking piece 340 can rotate along an arc trajectory under the rotation of the movable ring seat 330, thereby cooperating with the sliding convexity 341 in the linear sliding groove 311 to complete the deflection locking of the inner wall of the flange ring seat 120.

[0063] The working principle and use process of the present application are as follows:

[0064] The wind turbine cabin cover of the present application adopts a design of using a telescopic pull rod self-locking cover. The design mainly consists of a fan cabin 100, a cover head shell 110, an outer buckle 200, a joint locking piece 300, and a flange ring seat 120. The working principle is as follows:

[0065] 1. Connection of the fan cabin 100 and the cover head shell 110: the fan cabin 100 and the cover head shell 110 are connected through the outer buckle 200, which includes a connecting foot plate 210, a buckling foot plate 220, a buckling handle 230, and a connecting rod 240. The connecting foot plate 210 and the buckling foot plate 220 are fixed to the surfaces of the fan cabin 100 and the cover head shell 110, respectively, and the buckling handle 230 is movably connected to the connecting foot plate 210 through the connecting rod 240.

[0066] 2. Locking function of the outer buckle 200: by adjusting the length of the connecting rod 240, the connection distance between the fan cabin 100 and the cover head shell 110 is adapted. When the outer buckle 200 is in the correct position, the buckling handle 230 and the connecting foot plate 210 form a firm locking structure. The surfaces of the buckling handle 230 and the buckling foot plate 220 are respectively provided with an electrode insertion hole 221 and an electrode insertion rod 232 for the control signal input of the joint locking piece 300, to ensure that the two are not loose after connection.

[0067] 3. The driving and locking function of the engagement lock 300: The engagement lock 300 includes a fixed ring seat 310, a driving ring 320, a movable ring seat 330, and a locking piece 340. When the engagement lock 300 is connected with the cover head shell 110, the electrical signal is transmitted between the electrode insertion rod 232 and the electrode insertion hole 221, and the control module receives the electrical signal and drives the electric driving rod 321 to work. The electric driving rod 321 pushes the driving ring 320, drives the movable ring seat 330 to slide, and then pushes the locking piece 340 to complete the locking of the inside of the flange ring seat 120.

[0068] 4. The cooperation of the locking piece 340 and the flange ring seat 120: When the driving ring 320 starts to move through the electric driving rod 321, the movable ring seat 330 drives the locking piece 340 to slide and deflect, and the locking piece 340 finally contacts and locks the inside of the flange ring seat 120, ensuring the firm connection between the fan cabin 100 and the cover head shell 110.

[0069] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "a specific embodiment", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0070] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A wind turbine nacelle using a retractable pull rod self-locking cover, characterized in that: include: A wind turbine cabin (100), a cover head shell (110), an external fastener (200) fixed to the outer periphery of the wind turbine cabin (100) and the cover head shell (110), and a joint lock (300) fixed to one end of the cover head shell (110); one end of the cover head shell (110) is fixedly connected to a flange ring seat (120); The external fastener (200) includes a pin plate (210), a buckle plate (220), a buckle handle (230) and a connecting rod (240); a hook foot (211) is provided on the surface of the pin plate (210); one end of the connecting rod (240) is movably connected to the surface of the buckle handle (230), and the other end of the connecting rod (240) is provided with a collar (241) for connecting with the hook foot (211); the pin plate (210) and the buckle plate (220) are respectively fixed to the surface of the hood shell (110) and the wind turbine cabin (100), and the surfaces of the buckle plate (220) and the buckle handle (230) are respectively provided with an electrode socket (221) and an electrode plug rod (232); the ends of the electrode plug rod (232) and the electrode socket (221) are both connected with electrodes for engaging the control signal input of the lock member (300); The engaging lock member (300) comprises a fixed ring seat (310), an active ring (320), a dynamic ring seat (330) and a plurality of locking plates (340); a plurality of electric drive rods (321) for driving the active ring (320) to move are fixedly mounted on the surface of the fixed ring seat (310); a plurality of linear slide grooves (311) and arc slide grooves (331) are respectively provided on the surfaces of the fixed ring seat (310) and the dynamic ring seat (330); a plurality of spiral slide grooves (322) are provided on the outer periphery of the active ring (320), and a sliding pin (332) that is in sliding contact with the surface of the spiral slide groove (322) is provided on the inner side of the dynamic ring seat (330); a shaft pin (342) that is slidably sleeved on the inner side of the arc slide groove (331) is provided on the surface of the locking plate (340). , and the surface of the locking piece (340) is further provided with a sliding protrusion (341) that is slidably sleeved on the inner side of the line slide groove (311); the dynamic ring seat (330) is rotatably mounted on the surface of the fixed ring seat (310) and sleeved on the outer periphery of the active ring (320); the locking piece (340) achieves abutment and locking against the inner side of the flange ring seat (120) through sliding and deflecting movements, thereby completing the connection and locking of the joint locking member (300) and the flange ring seat (120).

2. The wind turbine nacelle cover using a retractable pull rod self-locking cover according to claim 1, characterized in that: The buckle handle (230) is rotatably mounted on the surface of the buckle foot plate (220), one end of the connecting rod (240) is connected to the surface of the buckle handle (230), and the connection position is offset relative to the rotation axis between the buckle handle (230) and the buckle foot plate (220), and the connecting rod (240) includes a screw and a screw sleeve to form a telescopic rod structure, which is used to adapt the connection distance between the wind turbine cabin (100) and the hood shell (110) by adjusting the length of the connecting rod (240).

3. The wind turbine nacelle cover using a retractable pull rod self-locking cover according to claim 1, characterized in that: A spherical groove is provided on the inner side of the buckle handle (230), and a ball head is provided on the end of the connecting rod (240) and is rotatably sleeved on the inner side of the spherical groove of the buckle handle (230).

4. The wind turbine nacelle cover using a retractable pull rod self-locking cover according to claim 1, characterized in that: The electrode plug rod (232) is movably mounted on the surface of the buckle handle (230), and a spring is sleeved on the surface. The electrode socket (221) and the electrode plug rod (232) are both metal components, and are used to form an electrical signal output through electrode connection when the two are joined.

5. The wind turbine nacelle cover using a retractable pull rod self-locking cover according to claim 1, characterized in that: The spiral chute (322) and the sliding pin (332) are arranged in a one-to-one correspondence, and the spiral chute (322) is in the shape of a spiral strip.

6. The wind turbine nacelle cover using a retractable pull rod self-locking cover according to claim 1, characterized in that: The arc chute (331) and the linear chute (311) are arranged in one-to-one correspondence with the sliding protrusion (341) and the shaft pin (342), respectively. The linear chute (311) is arranged along a tangential straight line on the surface of the fixed ring seat (310). The arc chute (331) is arc-shaped, and the distances between the two ends of the arc chute (331) and the center of the movable ring seat (330) are unequal.

7. The wind turbine nacelle cover using a retractable pull rod self-locking cover according to claim 1, characterized in that: The plurality of locking pieces (340) are evenly distributed in the circumferential direction, and one side of the locking piece (340) is in an inclined surface shape for slidingly abutting against the inner side of the flange ring seat (120).

8. The wind turbine nacelle cover using a retractable pull rod self-locking cover according to claim 1, characterized in that: The input end of the electric drive rod (321) is electrically connected to a control module, and the input end of the control module is electrically connected to the electrode socket (221) and the end of the electrode rod (232).

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