Foldable cover plate and wind turbine

Abstract

The application provides a folding cover plate and a wind turbine. The folding cover plate comprises a mounting reference element, a secondary connecting rod and a primary connecting rod. The mounting reference element is provided with a first sliding structure. A first end of the secondary connecting rod is rotatably mounted on the mounting reference element. A sub-cover plate is mounted on the secondary connecting rod. A first end of the primary connecting rod is in sliding connection with the first sliding structure, and the first end of the primary connecting rod is rotatable relative to the mounting reference element. A second end of the primary connecting rod is in rotary connection with a second end of the secondary connecting rod. The primary connecting rod has a first attitude and a second attitude relative to the mounting reference element. In the first attitude, an included angle of the secondary connecting rod relative to the mounting reference element is a first included angle. In the second attitude, the included angle of the secondary connecting rod relative to the mounting reference element is a second included angle. The first included angle is smaller than the second included angle. The wind turbine comprises the folding cover plate. The folding cover plate and the wind turbine are convenient for workers to enter the bottom of a cabin, open or close a hoisting hole of a cabin cover, and are simple to operate.

Description

Technical Field

[0001] This application relates to wind power generation technology, and more particularly to a folding cover plate and a wind turbine generator. Background Technology

[0002] A wind turbine is a system that converts wind energy into electrical energy. A wind turbine consists of a tower, nacelle, nacelle cover, generator, gearbox, and control system. The tower is the vertical structure of the entire wind turbine, supporting the nacelle, nacelle cover, generator, gearbox, and control system. The nacelle is mounted on top of the tower and includes a base and footboards. The generator, gearbox, and other components are mounted on the base. The footboards, installed on the base and nacelle cover, level the floor inside the nacelle for easy movement. The nacelle cover protects the generator, gearbox, and control system from environmental factors such as wind, rain, snow, salt spray, and ultraviolet radiation, while also providing sound and heat insulation.

[0003] In the prior art, a first hoisting hole is provided at the bottom of the cabin cover, and a first cover plate is provided at the location of the first hoisting hole. The first cover plate is used to open or close the first hoisting hole. A second hoisting hole is provided on the footboard, opposite to the first hoisting hole and located above the first hoisting hole. A second cover plate is provided at the location of the second hoisting hole on the footboard, used to close or open the second hoisting hole. It should be noted that when materials need to be transported, personnel entering the cabin need to open the second hoisting hole first, and then manually open the first hoisting hole.

[0004] However, after opening the second hoisting hole, the distance between the footboard and the bottom of the cabin cover is large, so the personnel need to lie on the footboard and reach out to reach the first cover to open it, which is inconvenient. Utility Model Content

[0005] This application provides a folding cover and a wind turbine to solve the problem of inconvenience in the operation process when workers open the cover on the nacelle.

[0006] On one hand, this application provides a folding cover plate, which includes: a mounting reference member, the mounting reference member being provided with a first sliding structure; a secondary connecting rod, the first end of which is rotatably mounted on the mounting reference member; a sub-cover plate, the sub-cover plate being mounted on the secondary connecting rod; a main connecting rod, the first end of which is slidably connected to the first sliding structure and is rotatable relative to the mounting reference member, and the second end of which is rotatably connected to the second end of the secondary connecting rod; wherein, the main connecting rod has a first posture and a second posture relative to the mounting reference member. In the first posture, the first end of the main connecting rod is located at a first extreme position relative to the first sliding structure, and the included angle between the secondary connecting rod and the mounting reference member is a first included angle. In the second posture, the second end of the main connecting rod is located at a second extreme position relative to the first sliding structure, and the included angle between the secondary connecting rod and the mounting reference member is a second included angle, wherein the first included angle is smaller than the second included angle.

[0007] In some possible implementations, the main connecting rod switches between a first posture and a second posture relative to the mounting reference member; when switching from the first posture to the second posture, the first included angle gradually increases to the second included angle.

[0008] In some possible implementations, the first sliding structure is a long strip-shaped first slide groove; the first end of the main connecting rod is provided with a first slider, which is slidably disposed in the first slide groove; wherein, in a first posture, the first slider is located at the first end of the first slide groove, and in a second posture, the first slider is located at the second end of the first slide groove.

[0009] In some possible implementations, the mounting reference member is rod-shaped, and the length direction of the first slide groove is the extension direction of the mounting reference member; a cylindrical mounting post is provided at the first end of the main connecting rod, the mounting post protruding from the side of the main connecting rod, and the mounting post is inserted into the first slide groove.

[0010] In some possible implementations, the mounting reference component includes a connector and two mounting components. The two ends of the connector are respectively connected to the first end of a mounting component. The two mounting components are arranged opposite to each other, and each mounting component is provided with a first sliding structure. There are two secondary connecting rods, which are respectively connected to the two ends of the sub-cover plate. There are two main connecting rods, and the first end of each main connecting rod is slidably connected to each of the first sliding structures, and the second end of each main connecting rod is rotatably connected to the second end of each secondary connecting rod.

[0011] In some possible implementations, each end of the sub-cover plate is rotatably mounted on a corresponding secondary connecting rod, and the rotation center lines of the sub-cover plate and the two secondary connecting rods coincide and form a first center line; the folding cover plate also includes an auxiliary connecting rod, on which a second sliding structure is provided, the auxiliary connecting rod is rotatably connected to the sub-cover plate, and the rotation center line of the auxiliary connecting rod and the sub-cover plate is a second center line, which is parallel to and does not coincide with the first center line; at least one of the main connecting rods is also provided with a third sliding structure protruding from the side of the main connecting rod, the third sliding structure being slidably connected to the second sliding structure, and the main connecting rod is rotatable relative to the auxiliary connecting rod.

[0012] In some possible implementations, the second sliding structure is a long, narrow second sliding groove; the third sliding structure is a cylindrical protrusion provided on the main connecting rod, which is inserted into the second sliding groove.

[0013] In some possible implementations, there are two auxiliary links, which are rotatably connected to both ends of the sub-cover plate; each third sliding structure is slidably connected to each second sliding structure in a one-to-one correspondence.

[0014] In some possible implementations, the sub-cover plate is a long strip-shaped plate-like pedal, each end of which has a first rotatable mounting position and a second rotatable mounting position, which are arranged along the width direction of the plate-like pedal; each end of the plate-like pedal is rotatably connected to a corresponding secondary connecting rod at the first rotatable mounting position; each end of the plate-like pedal is rotatably connected to a corresponding auxiliary connecting rod at the second rotatable mounting position.

[0015] In some possible implementations, there are at least two plate-shaped pedals, which are arranged along the length of the secondary link; each end of each plate-shaped pedal is rotatably connected to a corresponding secondary link in its first rotatable mounting position; and each end of each plate-shaped pedal is rotatably connected to a corresponding auxiliary link in its second rotatable mounting position.

[0016] On the other hand, this application provides a wind turbine generator that includes the aforementioned folding cover plate.

[0017] The folding cover and wind turbine provided in this application have a secondary connecting rod whose first end is rotatably mounted on a mounting reference component. The second end of the secondary connecting rod is rotatably connected to the second end of the main connecting rod. The first end of the main connecting rod is slidably connected to a first sliding structure on the mounting reference component, and the first end of the main connecting rod is rotatable relative to the mounting reference component. The mounting reference component, the secondary connecting rod, and the main connecting rod constitute a slider-linkage mechanism. When the first end of the main connecting rod is at a first limit position relative to the first sliding structure, the included angle between the secondary connecting rod and the mounting reference component is a first included angle. When the first end of the main connecting rod is at a second limit position relative to the first sliding structure... Position: The angle between the secondary connecting rod and the mounting reference component is the second angle, and the first angle is smaller than the second angle. The sub-cover plate mounted on the secondary connecting rod moves with the secondary connecting rod. When the mounting reference component is installed at the position of the hoisting hole of the pedal, in the first posture described above, the sub-cover plate can block the hoisting hole where the mounting reference component is located with the secondary connecting rod. In the second posture described above, the sub-cover plate can open the hoisting hole where the mounting reference component is located with the secondary connecting rod, and the sub-cover plate forms a step. In this way, the operator can step on the sub-cover plate to enter the bottom of the nacelle cover, and then easily open the nacelle cover, making the operation simpler and more convenient. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0019] Figure 1 Structural diagram of the folding cover plate provided for some possible embodiments of this application Figure 1 ;

[0020] Figure 2 Structural diagram of the folding cover plate provided for some possible embodiments of this application Figure 2 ;

[0021] Figure 3 The diagram shows the structure of a wind turbine for some possible implementations of this application.

[0022] Explanation of reference numerals in the attached figures:

[0023] 100: Mounting reference component; 101: First slide groove; 102: Connector; 103: Mounting component;

[0024] 200: Secondary link;

[0025] 300: Main connecting rod; 301: Mounting post; 302: Cylindrical protrusion;

[0026] 400: Sub-cover plate;

[0027] 500: Auxiliary connecting rod; 501: Second slide rail; 502: Auxiliary straight rod; 503: Auxiliary curved rod;

[0028] 600: Hanging hole.

[0029] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0030] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0031] The prior art of this application will be introduced first.

[0032] In existing technology, the nacelle cover is generally a long, narrow box structure. The first end of the nacelle cover is far from the tower, and a first lifting hole is provided at the bottom of the first end. This first lifting hole is mainly used for transporting materials during equipment installation and component replacement. The second end of the nacelle cover is close to the tower, and an assembly hole is provided at the bottom of the second end for mating with the tower. A personnel access hole and a second lifting hole are provided on the platform. The personnel access hole is opposite to the assembly hole, allowing personnel to directly enter and exit the nacelle. The second lifting hole is opposite to the first lifting hole. A first cover plate is provided at the location of the first lifting hole on the nacelle cover, used to open or close the first lifting hole. A second cover plate is provided at the location of the second lifting hole on the platform, used to close or open the second lifting hole. It should be noted that when materials need to be transported into the nacelle, personnel first enter the tower from the bottom, then enter the nacelle through the personnel access hole. Afterwards, the second lifting hole needs to be opened, and then the first lifting hole is manually opened before material transport can proceed.

[0033] However, after opening the second hoisting hole, the distance between the footboard and the bottom cover of the cabin is relatively large. Personnel need to lie on the footboard and reach out to reach the first cover to open it, which is inconvenient.

[0034] The folding cover and wind turbine of this application are composed of a sliding link mechanism consisting of a mounting reference component, a main connecting rod, and a secondary connecting rod. The relative movement between the mounting reference component and the main connecting rod includes sliding and rotation, while the relative movement between the secondary connecting rod and the mounting reference component, as well as between the secondary connecting rod and the main connecting rod, is rotation. A sub-cover plate mounted on the secondary connecting rod forms a step. Thus, when the rotation angle between the secondary connecting rod and the mounting reference component approaches zero, the sub-cover plate moves with the secondary connecting rod and can rotate to close the first hoisting hole. When the rotation angle between the secondary connecting rod and the mounting reference component is non-zero, the sub-cover plate moves with the secondary connecting rod and can rotate to open the hoisting hole on the nacelle cover. When the angle between the secondary connecting rod and the mounting reference component is at its maximum, the sub-cover plate fully opens the hoisting hole on the nacelle cover, and the sub-cover plate forms a step.

[0035] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0036] like Figure 1 and Figure 2 As shown, Figure 1 Structural diagram of the folding cover plate provided for some possible embodiments of this application Figure 1 , Figure 2 Structural diagram of the folding cover plate provided for some possible embodiments of this application Figure 2 The folding cover provided in this embodiment includes a mounting reference 100, a secondary connecting rod 200, and a main connecting rod 300. The mounting reference 100 is provided with a first sliding structure. The first end of the secondary connecting rod 200 is rotatably mounted on the mounting reference 100. The first end of the main connecting rod 300 is slidably connected to the first sliding structure and is rotatable relative to the mounting reference 100. The second end of the main connecting rod 300 is rotatably connected to the second end of the secondary connecting rod 200. The mounting reference 100, the secondary connecting rod 200, and the main connecting rod 300 form a slider-linkage mechanism. The movement between the main connecting rod 300 and the mounting reference 100 is sliding plus rotation, and the movement between the main connecting rod 300 and the secondary connecting rod 200 is rotation. The main connecting rod 300 forms a crank in the slider-linkage mechanism, and the movement between the secondary connecting rod 200 and the mounting reference 100 is rotation.

[0037] The main connecting rod 300 has a first posture and a second posture relative to the mounting reference member 100. In the first posture, the first end of the main connecting rod 300 is located at a first extreme position relative to the first sliding structure, and the angle between the secondary connecting rod 200 and the mounting reference member 100 is the first included angle. In the second posture, the second end of the main connecting rod 300 is located at a second extreme position relative to the first sliding structure, and the angle between the secondary connecting rod 200 and the mounting reference member 100 is the second included angle. The first included angle is smaller than the second included angle. In some possible embodiments, the first included angle between the secondary connecting rod 200 and the mounting reference member 100 can be, for example, zero degrees, or a non-zero angle close to zero degrees, such as any angle within 1°. The second included angle between the secondary connecting rod 200 and the mounting reference member 100 can be a non-zero included angle. The size of the second included angle is determined by the dimensions of the secondary connecting rod 200, the dimensions of the main connecting rod 300, and the positions of the first and second extreme positions on the mounting reference member 100.

[0038] like Figure 1 As shown, the folding cover provided in this embodiment of the application also includes a sub-cover plate 400, which is mounted on the secondary connecting rod 200. When the secondary connecting rod 200 rotates relative to the mounting reference member 100, the sub-cover plate 400 also rotates relative to the mounting reference member 100 along with the secondary connecting rod 200.

[0039] The folding cover provided in this application can be installed inside the nacelle of a wind turbine, specifically at the hoisting hole of the footplate. Figure 3 As shown, the pedal is equipped with a lifting hole, which can be rectangular. A mounting reference piece 100 is mounted on the pedal, near one side of the lifting hole. A sub-cover plate 400 can be configured to be opposite the lifting hole. When the sub-cover plate 400 rotates with the secondary connecting rod 200, it rotates relative to the mounting reference piece 100. When the angle between the secondary connecting rod 200 and the mounting reference piece 100 is the first angle, the sub-cover plate 400 covers the lifting hole. When the angle between the secondary connecting rod 200 and the mounting reference piece 100 is the second angle, the sub-cover plate 400 opens the lifting hole, forming a step. Thus, in actual use, when the operator needs to open the nacelle cover, only force needs to be applied to the main connecting rod 300 to open the lifting hole and form a step. The operator can then step on the step formed by the sub-cover plate 400 to enter the bottom of the nacelle cover and open the cover, making the entire operation much simpler.

[0040] The folding cover provided in this application allows the step formed by the sub-cover 400 to be either above or below the foot pedal. Only when the step formed by the sub-cover 400 is below the foot pedal, in this state, the main connecting rod 300 is in its first extreme position, allowing personnel to step onto the step formed by the sub-cover 400 to enter the bottom of the cabin. When the step formed by the sub-cover 400 is above the foot pedal, in this state, the main connecting rod 300 is also in its first extreme position, allowing personnel to step onto the step formed by the sub-cover 400 to reach the top of the cabin canopy and then attach their safety rope to the top of the cabin canopy. Compared to personnel not being able to reach the top of the cabin canopy and directly setting the safety anchor point at the bottom of the cabin canopy, setting the safety anchor point at the top of the cabin canopy better meets the industry's high anchor point requirements. The main connecting rod 300 switches between a first and a second posture relative to the mounting reference component 100. When switching from the first posture to the second posture, the first included angle gradually increases to the second included angle, and when switching from the second posture to the first posture, the second included angle gradually decreases to the first included angle. In this way, the main connecting rod 300 smoothly switches between the first and second postures relative to the mounting reference component 100. Figure 1 and Figure 2 As shown, the first sliding structure is an elongated first slide groove 101, and a first slider is provided at the first end of the main connecting rod 300. The first slider is slidably disposed within the first slide groove 101. In a first posture, the first slider is located at the first end of the first slide groove 101, and in a second posture, the first slider is located at the second end of the first slide groove 101. The first slide groove 101 can be a hole provided on the mounting reference member 100, and the cross-section of the first slide groove 101 in the direction perpendicular to its depth is an elongated hole. The first slider can be cylindrical or cubic. Of course, when the first slider is cubic, the first end of the main connecting rod 300 and the cubic first slider are rotatably connected.

[0041] The first sliding structure is a long strip-shaped first sliding groove 101. The first end of the main connecting rod 300 is provided with a first slider. The first slider is slidably disposed in the first sliding groove 101, which can realize the sliding connection between the first end of the main connecting rod 300 and the first sliding structure. It can also make it easier to install the reference part 100 at the position to be installed, and it is less likely to interfere with the parts at the position to be installed.

[0042] like Figure 1 and Figure 2As shown, the mounting reference component 100 is rod-shaped, and the length direction of the first sliding groove 101 is the extension direction of the mounting reference component 100. A cylindrical mounting post 301 is provided at the first end of the main connecting rod 300, protruding from the side of the main connecting rod 300. The mounting post 301 and the main connecting rod 300 can be an integral structure. The mounting post 301 can also be fixed to the side of the main connecting rod 300 by conventional mechanical connection methods such as welding, insertion, or hinge. The mounting post 301 is inserted into the first sliding groove 101. The mounting post 301 can not only slide within the first sliding groove 101, but also rotate within the first sliding groove 101, thereby achieving a rotatable connection between the main connecting rod 300 and the mounting reference.

[0043] In the embodiment shown above, the first extreme position is when the main connecting rod 300 is located at one end of the first slide groove 101 near the constrained end of the mounting reference member 100, and the second extreme position is when the main connecting rod 300 is located at one end of the first slide groove 101 near the free end of the mounting reference member 100.

[0044] The mounting reference component 100 is rod-shaped, and the length direction of the first sliding groove 101 is the extension direction of the mounting reference component 100. The first end of the main connecting rod 300 is provided with a cylindrical mounting post 301, which protrudes from the side of the main connecting rod 300. The mounting post 301 is inserted into the first sliding groove 101. This not only realizes the sliding connection and rotational connection between the mounting reference component 100 and the first end of the main connecting rod 300, but also simplifies the structure and reduces the cost by using only the cooperation of the first sliding groove 101 and the mounting post 301.

[0045] like Figure 1 and Figure 2 As shown, the mounting reference component 100 includes a connector 102 and two mounting components 103. Each end of the connector 102 is connected to the first end of one mounting component 103. The two mounting components 103 are positioned opposite each other, and each mounting component 103 has a first sliding structure. The connector 102 and each mounting component 103 can be integrally formed or connected by welding or other conventional mechanical means. The connector 102 and the two mounting components 103 can be rods with a rectangular cross-section.

[0046] like Figure 1 and Figure 2 As shown, there are two secondary connecting rods 200, which are respectively connected to the two ends of the sub-cover plate 400. There are two main connecting rods 300, with the first end of each main connecting rod 300 being slidably connected to each first sliding structure, and the second end of each main connecting rod 300 being rotatably connected to the second end of each secondary connecting rod 200.

[0047] For example, when the folding cover plate of this application is installed at the rectangular lifting hole of the pedal in the wind turbine, the connector 102 and the two mounting parts 103 are respectively installed at the three sides of the lifting hole. The two mounting parts 103 are arranged opposite each other on the two opposite sides of the lifting hole. Correspondingly, the two secondary connecting rods 200 are also located opposite each other on the two opposite sides of the lifting hole, and the two main connecting rods 300 are also located opposite each other on the two opposite sides of the lifting hole. Each mounting part 103, each secondary connecting rod 200 and each main connecting rod 300 are arranged in a one-to-one correspondence. The sub-cover plate 400 is located between the two secondary connecting rods 200 and is arranged opposite to the lifting hole.

[0048] By providing two mounting parts 103, two main connecting rods 300, and two secondary connecting rods 200, the two ends of the sub-cover plate 400 can rotate simultaneously relative to the mounting reference part 100, making the rotation process smoother and more reliable. Furthermore, the two mounting parts 103 are installed through the connector 102, ensuring a reliable connection between the two mounting parts 103 and the connector 102. When the secondary connecting rods 200 rotate relative to the mounting reference part 100, the rotation is smoother and more stable. In other words, the rotation of the sub-cover plate 400 relative to the mounting reference part 100 is more stable and reliable.

[0049] like Figure 1 and Figure 2 As shown, each end of the sub-cover plate 400 is rotatably mounted on a corresponding secondary connecting rod 200. The rotation center lines of the sub-cover plate 400 and the two secondary connecting rods 200 coincide and form a first center line. The folding cover plate also includes an auxiliary connecting rod 500, which is provided with a second sliding structure. The auxiliary connecting rod 500 is rotatably connected to the sub-cover plate 400. The rotation center lines of the auxiliary connecting rod 500 and the sub-cover plate 400 are the second center line, which is parallel to and does not coincide with the first center line. At least one of the main connecting rods 300 is also provided with a third sliding structure protruding from the side of the main connecting rod 300. The third sliding structure is slidably connected to the second sliding structure, and the main connecting rod 300 is rotatable relative to the auxiliary connecting rod 500.

[0050] By setting an auxiliary link 500 and rotatably connecting the auxiliary link 500 to the sub-cover plate 400, and rotatably connecting the auxiliary link 500 to the main link 300 and slidably connecting the sub-cover plate 400 to the secondary link 200, the sub-cover plate 400 can not only rotate with the rotation of the secondary link 200, but also the rotation of the sub-cover plate 400 can be interfered with by the auxiliary link 500, thereby helping to fix the movement trajectory of the main link 300.

[0051] In the above-described embodiment, when the folding cover is installed at the hoisting hole position of the footplate in the wind turbine, the sub-cover 400 can close the hoisting hole in a first position and switch from the first position to a second position, or switch from the second position to the first position. Alternatively, in the second position, not only can the hoisting hole be opened, but the sub-cover 400 can also remain parallel to the mounting reference member 100, allowing it to be used as a staircase. Furthermore, when the sub-cover 400 has its hoisting hole open and is located above the footplate, workers can step on the sub-cover 400 to suspend their safety ropes from the top of the nacelle cover, ensuring reliable and safe operation. When the sub-cover 400 has its hoisting hole open and is located below the footplate, workers can step on the sub-cover 400 to enter the bottom of the nacelle cover and then open the hoisting hole cover at the bottom of the nacelle cover, making the operation simple and convenient.

[0052] like Figure 1 and Figure 2 As shown, the second sliding structure is a long, narrow second sliding groove 501, and the third sliding structure is a cylindrical protrusion 302 provided on the main connecting rod 300, which is inserted into the second sliding groove 501. The cylindrical protrusion 302 and the main connecting rod 300 can be integrally formed, or they can be connected by conventional mechanical methods such as welding.

[0053] The cylindrical protrusion 302 is inserted into the second sliding groove 501, which not only enables the sliding connection between the auxiliary connecting rod 500 and the main connecting rod 300, but also enables the rotational connection between the auxiliary connecting rod 500 and the main connecting rod 300. This makes the connection between the auxiliary connecting rod and the main connecting rod 300 simple and reliable, and simplifies the structure.

[0054] like Figure 1 and Figure 2 As shown, there are two auxiliary connecting rods 500. The two auxiliary connecting rods 500 are rotatably connected to both ends of the sub-cover plate 400. Each third sliding structure is slidably connected to each second sliding structure.

[0055] Two auxiliary links 500 are provided, and the two auxiliary links 500 are rotatably connected to the sub-cover plate 400. The third sliding structure is slidably connected to the second sliding structure in a one-to-one correspondence. This makes the movement of the auxiliary links 500 more stable and reliable when interfering with the movement trajectory of the main link 300 and the sub-cover plate 400.

[0056] like Figure 1 and Figure 2As shown, the sub-cover plate 400 is a long strip-shaped plate-like pedal. Each end of the plate-like pedal has a first rotating mounting position and a second rotating mounting position. The first rotating mounting position and the second rotating mounting position are arranged along the width direction of the plate-like pedal. Each end of the plate-like pedal is rotatably connected to a corresponding secondary connecting rod 200 at the first rotating mounting position. Each end of the plate-like pedal is rotatably connected to a corresponding auxiliary connecting rod 500 at the second rotating mounting position.

[0057] When the folding cover plate of this application is installed at the hoisting hole position of the pedal in the wind turbine, the sub-cover plate 400 is in the shape of a plate-shaped pedal. The sub-cover plate 400 not only better matches the shape of the pedal hoisting hole and more reliably covers the hoisting hole of the pedal, but also forms a staircase for workers to walk on, making it convenient for personnel to hang safety anchors or open the hoisting hole of the nacelle cover.

[0058] like Figure 1 and Figure 2 As shown, the number of plate-shaped pedals is at least two, for example, three, four, five, etc. At least two plate-shaped pedals are arranged along the length of the secondary connecting rod 200; each end of each plate-shaped pedal is rotatably connected to a corresponding secondary connecting rod 200 in its first rotatable mounting position; each end of each plate-shaped pedal is rotatably connected to a corresponding auxiliary connecting rod 500 in its second rotatable mounting position. In the first posture, at least two plate-shaped pedals at least partially cover the lifting hole. Of course, in the first posture, at least two plate-shaped pedals can completely cover the lifting hole, which is safer and more reliable.

[0059] By providing at least two plate-shaped steps, the height of each step of the staircase formed by the sub-cover plate 400 can be more suitable for people to walk on when the lifting hole of the sub-cover plate 400 is opened.

[0060] like Figure 1 and Figure 2 In the illustrated embodiment, there are three sub-cover plates 400. The auxiliary connecting rod 500 includes auxiliary straight rods 502 and auxiliary bent rods 503. The number of auxiliary straight rods 502 and auxiliary bent rods 503 is equal, and each is one less than the number of sub-cover plates 400. One auxiliary straight rod 502 and one auxiliary bent rod 503 are arranged between every two sub-cover plates 400. In two adjacent sub-cover plates 400, one sub-cover plate 400 is connected to one end of the auxiliary bent rod 503, the other end of the auxiliary bent rod 503 is connected to one end of the auxiliary straight rod 502, and the other end of the auxiliary connecting rod 502 is connected to the other sub-cover plate 400. The aforementioned second sliding groove 501 is provided on one of the auxiliary straight rods 502, and the auxiliary straight rod 502 is rotatably connected to the sub-cover plate 400.

[0061] like Figure 3As shown in the illustration, this application also provides a wind turbine generator set, which includes the aforementioned folding cover plate. The folding cover plate is installed at the lifting hole 600 position of the internal pedal of the wind turbine generator set.

[0062] The wind turbine provided in this application has all the beneficial effects of the aforementioned folding cover plate because it uses the folding cover plate described above.

[0063] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0064] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A folding cover plate, characterized in that, include: The mounting reference component is provided with a first sliding structure; Secondary connecting rod, the first end of which is rotatably mounted on the mounting reference member; Sub-cover plate, the sub-cover plate being mounted on the secondary connecting rod; The main connecting rod has a first end that is slidably connected to the first sliding structure and is rotatable relative to the mounting reference member. The second end of the main connecting rod is rotatably connected to the second end of the secondary connecting rod. The main connecting rod has a first posture and a second posture relative to the mounting reference component. In the first posture, the first end of the main connecting rod is located at a first extreme position relative to the first sliding structure, and the angle between the secondary connecting rod and the mounting reference component is a first angle. In the second posture, the second end of the main connecting rod is located at a second extreme position relative to the first sliding structure, and the angle between the secondary connecting rod and the mounting reference component is a second angle. The first angle is smaller than the second angle.

2. The folding cover plate according to claim 1, characterized in that, The main connecting rod switches between the first posture and the second posture relative to the mounting reference component; When switching from the first posture to the second posture, the first included angle gradually increases to the second included angle.

3. The folding cover plate according to claim 2, characterized in that, The first sliding structure is a long strip-shaped first groove; The first end of the main connecting rod is provided with a first slider, which is slidably disposed in the first groove. In the first posture, the first slider is located at the first end of the first groove, and in the second posture, the first slider is located at the second end of the first groove.

4. The folding cover plate according to claim 3, characterized in that, The mounting reference component is rod-shaped, and the length direction of the first groove is the extension direction of the mounting reference component; The first end of the main connecting rod is provided with a cylindrical mounting post, which protrudes from the side of the main connecting rod and is inserted into the first sliding groove.

5. The folding cover plate according to any one of claims 1-4, characterized in that, The mounting reference component includes a connector and two mounting components. The two ends of the connector are respectively connected to the first end of one of the mounting components. The two mounting components are arranged opposite to each other, and each mounting component is provided with a first sliding structure. The number of secondary connecting rods is two, and the two secondary connecting rods are respectively connected to the two ends of the sub-cover plate; The number of main connecting rods is two, and the first end of each main connecting rod is slidably connected to each of the first sliding structures, and the second end of each main connecting rod is rotatably connected to the second end of each secondary connecting rod.

6. The folding cover plate according to claim 5, characterized in that, Each end of the sub-cover plate is rotatably mounted on a corresponding secondary connecting rod, and the rotation center lines of the sub-cover plate and the two secondary connecting rods coincide and form the first center line; The folding cover also includes an auxiliary connecting rod, on which a second sliding structure is provided. The auxiliary connecting rod is rotatably connected to the sub-cover. The rotation center line of the auxiliary connecting rod and the sub-cover is a second center line, which is parallel to and does not coincide with the first center line. At least one of the main connecting rods is also provided with a third sliding structure protruding from the side of the main connecting rod, the third sliding structure being slidably connected to the second sliding structure, and the main connecting rod being rotatable relative to the auxiliary connecting rod.

7. The folding cover plate according to claim 6, characterized in that, The second sliding structure is a long strip-shaped second sliding groove; The third sliding structure is a cylindrical protrusion provided on the main connecting rod, and the cylindrical protrusion is inserted into the second sliding groove.

8. The folding cover plate according to claim 6, characterized in that, The number of auxiliary connecting rods is two, and the two auxiliary connecting rods are rotatably connected to both ends of the sub-cover plate; Each of the third sliding structures is slidably connected to each of the second sliding structures.

9. The folding cover plate according to claim 8, characterized in that, The sub-cover plate is a long strip-shaped plate-like pedal. Each end of the plate-like pedal has a first rotating mounting position and a second rotating mounting position. The first rotating mounting position and the second rotating mounting position are arranged along the width direction of the plate-like pedal. Each end of the plate-shaped pedal is rotatably connected to a corresponding secondary connecting rod at the first rotatable mounting position. Each end of the plate-shaped pedal is rotatably connected to a corresponding auxiliary link in the second rotatable mounting position.

10. The folding cover plate according to claim 9, characterized in that, The number of plate-shaped pedals is at least two, and the at least two plate-shaped pedals are arranged along the length direction of the secondary connecting rod. Each end of each of the plate-shaped pedals is rotatably connected to a corresponding secondary connecting rod at its first rotatable mounting position. Each end of each of the plate-shaped pedals is rotatably connected to a corresponding auxiliary link in its second rotatable mounting position.

11. A wind turbine generator set, characterized in that, Includes the folding cover plate as described in any one of claims 1-10.

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