Assembly structure of root platform of wind power blade and manhole cover plate

Abstract

The application provides an assembly structure of a root platform and a manhole cover plate of a wind power blade, and relates to the technical field of wind power blade production. The assembly structure comprises: a root platform, which is provided with a manhole; a rotating shaft, which is arranged on the root platform; a manhole cover plate, which is sleeved on the rotating shaft through an axial hole and can move along the axial direction of the rotating shaft and rotate around the rotating shaft to cover or expose the manhole; a plurality of fasteners, which are fixed on the root platform and can fix the manhole cover plate and the root platform; an annular air bag, which is arranged on one side of the manhole cover plate facing the root platform, can move the manhole cover plate along the axial direction of the rotating shaft by inflating or deflating the air bag; and a sealing assembly, which is arranged on one side of the manhole cover plate facing the root platform and is used for sealing the gap between the manhole cover plate and the manhole when the manhole cover plate covers the manhole. The assembly structure solves the problem of high labor intensity of workers in the prior art due to the inconvenience of workers in moving the manhole cover plate because the manhole cover plate is heavy.

Description

Technical Field

[0001] This invention relates to the field of wind turbine blade manufacturing technology, specifically to an assembly structure for a root platform and manhole cover of a wind turbine blade. Background Technology

[0002] The root platform and manhole cover are important components at the root of wind turbine blades. Their main function is to provide maintenance personnel with a sufficiently rigid operating platform for wind turbine maintenance, and also to provide convenient access for maintenance personnel to enter the blades for maintenance.

[0003] Before entering the manhole, workers need to open the manhole cover. The space at the root platform of the wind turbine blade is limited, and the manhole cover often needs to be moved manually. If the manhole cover is too heavy, it is inconvenient to set up equipment to move the manhole cover on the narrow root platform, which makes it inconvenient for workers to move the manhole cover and increases the labor intensity of workers. Therefore, there is an urgent need for a convenient structure to solve at least one of the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide an assembly structure for the root platform and manhole cover of a wind turbine blade, which solves the problem of high labor intensity for workers caused by the inconvenience of moving the heavy manhole cover in the prior art.

[0005] To achieve the above objectives, the present invention provides an assembly structure for a root platform and a manhole cover of a wind turbine blade, the assembly structure comprising:

[0006] Manholes are provided at the base platform;

[0007] The pivot is mounted on the root platform;

[0008] The manhole cover is fitted onto the rotating shaft through an opening in the shaft hole, and can move along the axial direction of the rotating shaft and rotate around the rotating shaft to cover or expose the manhole.

[0009] Multiple fasteners are fixed to the root platform. When the manhole cover is sealed to the manhole, the manhole cover can be fixed to the root platform by multiple fasteners.

[0010] An annular airbag is installed on the side of the manhole cover facing the root platform. Inflating and deflating the annular airbag can drive the manhole cover to move axially along the rotating shaft.

[0011] A sealing assembly is provided on the side of the manhole cover facing the root platform, used to seal the gap between the manhole cover and the manhole when the manhole cover is covering the manhole.

[0012] Specifically, the assembly structure also includes: multiple rollers, which are detachably mounted on the side of the manhole cover facing the root platform.

[0013] Specifically, each fastener includes a stud and a nut screwed onto the stud, the stud being fixed to the root platform.

[0014] Specifically, the stud and the root platform are cast as a single unit.

[0015] Specifically, the pivot is positioned at a height higher than the horizontal height of each stud.

[0016] Specifically, the assembly structure further includes: a shaft cap, which is detachably mounted on the rotating shaft to limit the axial movement distance of the manhole cover on the rotating shaft.

[0017] Specifically, the sealing assembly includes felt or a brush.

[0018] Specifically, the assembly structure also includes a control rod, which is detachably mounted on the manhole cover plate and is used to control the rotation of the manhole cover plate around the pivot.

[0019] Specifically, the assembly structure further includes: a guardrail, the edge of which is fitted to the manhole cover and positioned between the manhole cover and the root platform.

[0020] Specifically, the railing is made of rubber.

[0021] The present invention provides an assembly structure for a wind turbine blade root platform and a manhole cover. A rotating shaft is installed on the root platform, and the manhole cover's shaft hole fits onto the rotating shaft, allowing the manhole cover to move axially along the shaft and rotate around it. Controlling the manhole cover's rotation around and axial movement along the shaft allows it to either seal or expose the manhole. To ensure the manhole cover remains stationary when sealing the manhole, multiple fasteners securely connect the manhole cover to the root platform, ensuring a proper seal. To facilitate opening the manhole cover, an annular airbag is installed on the side of the manhole cover facing the root platform. Inflating the annular airbag causes the manhole cover to move axially along the rotating shaft, moving it away from the manhole. To avoid interference with fasteners when the manhole cover rotates around the axis, the assembly structure of the wind turbine blade root platform and manhole cover provided by this invention allows the manhole cover to be either closed or exposed by controlling the axial movement and rotation of the manhole cover along the axis. This avoids the need for workers to move the manhole cover when entering the manhole to inspect and maintain the wind turbine blade, which not only facilitates operation but also reduces the labor intensity of workers. Furthermore, it allows workers to re-close the manhole after maintenance by controlling the axial movement and rotation of the manhole cover around the axis. This solves the problem of high labor intensity for workers caused by the inconvenience of moving the heavy manhole cover in existing technologies.

[0022] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0024] Figure 1 This is a top view of the assembly structure of the root platform and manhole cover of the wind turbine blade provided by the present invention.

[0025] Figure 2 yes Figure 1 A cross-sectional view (AA) of the assembly structure of the root platform and manhole cover of the wind turbine blade;

[0026] Figure 3 yes Figure 1 A cross-sectional view (AA) of the annular airbag being inflated in the assembly structure of the root platform and manhole cover of a wind turbine blade.

[0027] Explanation of reference numerals in the attached figures

[0028] 1-Root platform; 2-Spindle; 3-Manhole cover; 4-Annular airbag; 5-Roller; 6-Fastener; 7-Shaft cap; 8-Sealing assembly; 10-Manhole; 61-Stud; 62-Nut. Detailed Implementation

[0029] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0030] Figure 1 This is a top view of the assembly structure of the root platform and manhole cover of the wind turbine blade; Figure 2 yes Figure 1 A cross-sectional view (AA) of the assembly structure of the root platform and manhole cover of the wind turbine blade; Figure 3 yes Figure 1 A cross-sectional view (AA) of the annular airbag during inflation in the assembly structure of the root platform and manhole cover of a wind turbine blade. (See attached image.) Figures 1-3 As shown, the assembly structure of the root platform and manhole cover of the wind turbine blade provided by the present invention includes:

[0031] Root platform 1, with 10 manholes;

[0032] The rotating shaft 2 is mounted on the root platform 1;

[0033] The manhole cover 3 is fitted onto the rotating shaft 2 through an opening in the shaft hole, and can move along the axial direction of the rotating shaft 2 and rotate around the rotating shaft 2 to cover or expose the manhole 10.

[0034] Multiple fasteners 6 are fixed on the root platform 1. When the manhole cover 3 covers the manhole 10, the manhole cover 3 and the root platform 1 can be fixed by the multiple fasteners 6.

[0035] An annular airbag 4 is installed on the side of the manhole cover 3 facing the root platform 1. Inflating and deflating the annular airbag 4 can drive the manhole cover 3 to move axially along the rotating shaft 2.

[0036] The sealing assembly 8 is disposed on the side of the manhole cover 3 facing the root platform 1, and is used to seal the gap between the manhole cover 3 and the manhole 10 when the manhole cover 3 covers the manhole 10.

[0037] The assembly structure of the root platform and manhole cover of the wind turbine blade provided by this invention includes a vertically mounted rotating shaft 2 on the root platform 1. A manhole cover 3 has a shaft hole that fits into the rotating shaft 2. The manhole cover 3 is fitted onto the rotating shaft 2 through the shaft hole, allowing it to move axially along the rotating shaft 2 and rotate around it. By controlling the axial movement and rotation of the manhole cover 3 along and around the rotating shaft 2, the manhole cover 3 can either cover or expose the manhole 10. When the manhole cover 3 is covering the manhole 10, multiple fasteners 6 are used to secure it to the root platform 1 to prevent it from shifting and to ensure effective sealing. When the manhole cover 3 is exposed above the manhole 10, it facilitates personnel entering the manhole 10 for inspection and maintenance of the wind turbine blade. To open the manhole cover 3, the personnel first loosen the fasteners 6. After tightening, the manhole cover 3 is lifted away from the manhole 10 by inflating the annular airbag 4. Then, the manhole cover 3 is rotated to expose the manhole 10. Lifting the manhole cover 3 first can avoid interference between the manhole cover 3 and the fastener 6 when the manhole cover 3 rotates. The entire operation of opening the manhole cover 3 is easy to perform. By controlling the movement of the manhole cover 3 along the axis of the rotating shaft 2 and its rotation around the rotating shaft 2, the manhole cover 3 can be used to cover the manhole 10 or expose the manhole 10. This operation is more time-saving and labor-saving, avoiding the need for workers to move the manhole cover 3 when inspecting the blades. It not only facilitates the operation but also reduces the labor intensity of the workers. At the same time, it is convenient for workers to re-cover the manhole 10 by controlling the movement of the manhole cover along the axis of the rotating shaft 2 and its rotation around the rotating shaft 2 after the maintenance and inspection of the wind turbine blades. This solves the problem of high labor intensity caused by the inconvenience of workers moving the manhole cover due to its large weight in the existing technology.

[0038] In one embodiment, such as Figures 1-2As shown, the manhole cover 3 is circular, and the rotating shaft 2 is a stepped shaft. The shaft hole on the manhole cover 3 is fitted onto the rotating shaft 2. Each fastener 6 includes a stud 61 and a nut 62 screwed onto the stud 61. The stud 61 is fixed to the root platform 1. The stud 61 and the root platform 1 are integrally cast. The manhole cover 3 has through holes corresponding to the studs 61. When fixing the manhole cover 3, rotating the manhole cover 3 makes the through holes correspond one-to-one with the studs 61, gradually releasing the gas in the annular airbag 4. The manhole cover 3 moves axially along the rotating shaft 2 and gradually approaches the manhole 10. At the same time, the through holes on the manhole cover 3 gradually fit onto the corresponding studs 61. When the annular airbag 4 is deflated and the manhole cover 3 moves closer to the manhole 10, the corresponding nut 62 on each stud 61 is tightened onto the corresponding stud 61, thereby securing the manhole cover 3 and the root platform 1. In this way, the manhole cover 3 can be prevented from moving when sealing the manhole 10, thus affecting the sealing effect. In order to avoid the stud 61 from rotating continuously when tightening the nut 62, before casting the root platform 1, the stud 61 is pre-embedded in the holes of the fiberglass fabric and core material layup of the root platform 1. Then, the resin is introduced into the fiberglass fabric and core material layup using a vacuum injection process to fix the stud 61 to the root platform 1, so that each stud 61 is cast into the root platform 1 as one piece. In this way, the stud 61 will not rotate continuously when tightening the nut 62.

[0039] When workers open the manhole cover 3 to enter the manhole for wind turbine blade maintenance, they first loosen the nuts 62 fastened to each stud 61. Then, they inflate the annular airbag 4. The annular airbag 4 expands continuously, pushing the manhole cover 3 axially along the rotating shaft 2 until the through hole on the manhole cover 3 disengages from the stud 61. Afterward, they rotate the manhole cover 3 around the rotating shaft 2 to expose the manhole 10. The annular airbag 4 pushes the manhole cover 3 out of the stud 61, preventing it from colliding with the stud 61 when the manhole cover 3 is rotated later. To prevent interference during the rotation of the manhole cover 3, multiple rollers 5 are installed on the side of the manhole cover 3 facing the root platform 1 to facilitate easy rotation of the manhole cover 3 around the pivot 2. The rollers 5 are detachably mounted on the root platform 1. After each through-hole on the manhole cover 3 disengages from its corresponding stud 61, the roller 5 is installed onto the manhole cover 3, controlling its rotation around the pivot 2. Supported by the rollers 5, the manhole cover 3 can easily rotate around the pivot 2 to move away from above the manhole 10. Figure 3As shown, a bayonet can be set on the manhole cover 3, and the roller 5 can be inserted into the corresponding bayonet to complete the connection with the manhole cover 3. During the rotation of the manhole cover 3, the gas in the annular airbag 4 can be released to avoid friction between the annular airbag 4 and the root platform 1 when the manhole cover 3 is rotated. After the manhole 10 is exposed, the workers can enter the manhole 10 to work. When the manhole cover 3 is firmly connected to the root platform 1, an appropriate amount of gas can be injected into the annular airbag 4 to seal the gap between the manhole cover 3 and the root platform 1 through the annular airbag 4, so as to play the role of dust prevention and moisture prevention.

[0040] like Figure 2 and Figure 3 As shown, the height of the rotating shaft 2 is higher than the horizontal height of each stud 61. In order to avoid the studs 61 restricting the rotation of the manhole cover 3, the height of the rotating shaft 2 is higher than the horizontal height of the studs 61. By continuously inflating the annular air bladder 4, the annular air bladder 4 expands and drives the manhole cover 3 to move axially on the rotating shaft 2 until the manhole cover 3 is disengaged from the studs 61. After that, the manhole cover 3 will not be blocked by the studs 61 when rotating.

[0041] To prevent the manhole cover 3 from detaching from the rotating shaft 2, the assembly structure of the wind turbine blade root platform and the manhole cover also includes: a shaft cap 7, detachably mounted on the rotating shaft 2, used to limit the axial movement distance of the manhole cover 3 on the rotating shaft 2. Figure 2 As shown, when the manhole cover 3 covers the manhole 10, the shaft cap 7 is screwed onto the top of the rotating shaft 2. The shaft cap 7 restricts the axial movement distance of the manhole cover 3 on the rotating shaft 2, preventing the manhole cover 3 from detaching from the rotating shaft 2.

[0042] To prevent dust and moisture from entering the manhole 10 through the gap between the manhole cover 3 and the manhole 10, the sealing assembly 8 includes felt or a brush. A ring of felt or a brush is provided around the edge of the manhole 10, or a double-layer sealing assembly 8 is provided, using felt or a brush to block dust or moisture from entering the manhole 10.

[0043] To facilitate the operation of the manhole cover 3 around the pivot 2, the assembly structure also includes a control rod, which is detachably mounted on the manhole cover 3 for controlling the rotation of the manhole cover 3 around the pivot 2.

[0044] In another embodiment, a receiving groove is formed on the manhole cover plate 3, and a control rod is hinged in the receiving groove of the manhole cover plate 3. The control rod has a working state that protrudes vertically from the manhole cover plate 3 and a retracted state that is embedded in the receiving groove. The control rod is operated to rotate around the hinge point with the manhole cover plate 3. The control rod can switch between the working state and the retracted state. When it is necessary to control the rotation of the manhole cover plate 3, the control rod is adjusted to the working state, and the operator holds the control rod to control the rotation of the manhole cover plate 3.

[0045] To enhance dustproof performance, the assembly structure further includes a guardrail, which fits the edge of the manhole cover 3 and is positioned between the manhole cover 3 and the root platform 1. The guardrail is made of rubber. Figure 2 As shown, a rubber edging is provided around the edge of the manhole cover 3. The edging first blocks dust and moisture from entering the manhole 10, and then the sealing component 8 further seals it, thereby improving the protective effect.

[0046] The present invention provides an assembly structure for a wind turbine blade root platform and a manhole cover. A rotating shaft is installed on the root platform, and the manhole cover's shaft hole fits onto the rotating shaft, allowing the manhole cover to move axially along the shaft and rotate around it. Controlling the manhole cover's rotation around and axial movement along the shaft allows it to either seal or expose the manhole. To ensure the manhole cover remains stationary when sealing the manhole, multiple fasteners securely connect the manhole cover to the root platform, ensuring a proper seal. To facilitate opening the manhole cover, an annular airbag is installed on the side of the manhole cover facing the root platform. Inflating the annular airbag causes the manhole cover to move axially along the rotating shaft, moving it away from the manhole. To avoid interference with fasteners when the manhole cover rotates around the axis, the assembly structure of the wind turbine blade root platform and manhole cover provided by this invention allows the manhole cover to be either closed or exposed by controlling the axial movement and rotation of the manhole cover along the axis. This avoids the need for workers to move the manhole cover when entering the manhole to inspect and maintain the wind turbine blade, which not only facilitates operation but also reduces the labor intensity of workers. Furthermore, it allows workers to re-close the manhole after maintenance by controlling the axial movement and rotation of the manhole cover around the axis. This solves the problem of high labor intensity for workers caused by the inconvenience of moving the heavy manhole cover in existing technologies.

[0047] The optional embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above embodiments. Within the scope of the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all fall within the protection scope of the embodiments of the present invention.

[0048] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not describe the various possible combinations separately.

[0049] Furthermore, various different implementations of the present invention can be combined arbitrarily, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed in the present invention.

Claims

1. An assembly structure of a root platform and a manhole cover plate of a wind turbine blade, characterized by, The assembly structure includes: The root platform (1) has a manhole (10). A rotating shaft (2) is mounted on the root platform (1); The manhole cover (3) is fitted onto the rotating shaft (2) through an opening in the shaft hole, and can move along the axial direction of the rotating shaft (2) and rotate around the rotating shaft (2) to cover or expose the manhole (10). Multiple fasteners (6) are fixed on the root platform (1). When the manhole cover (3) covers the manhole (10), the manhole cover (3) can be fixed to the root platform (1) by the multiple fasteners (6). An annular airbag (4) is set on the side of the manhole cover (3) facing the root platform (1). Inflating and deflating the annular airbag (4) can drive the manhole cover (3) to move axially along the rotating shaft (2). A sealing assembly (8) is provided on the side of the manhole cover (3) facing the root platform (1) for sealing the gap between the manhole cover (3) and the manhole (10) when the manhole cover (3) covers the manhole (10); The assembly structure also includes: multiple rollers (5), which are detachably mounted on the side of the manhole cover (3) facing the root platform (1); Each fastener (6) includes: a stud (61) and a nut (62) screwed onto the stud (61), the stud (61) being fixed to the root platform (1); The stud (61) and the root platform (1) are integrally cast; The setting height of the rotating shaft (2) is higher than the horizontal height of each stud (61).

2. The assembly of claim 1, wherein The assembly structure also includes a shaft cap (7), which is detachably mounted on the rotating shaft (2) to limit the axial movement distance of the manhole cover (3) on the rotating shaft (2).

3. The assembly of claim 1, wherein The sealing assembly (8) includes a felt or a brush.

4. The assembly of claim 1, wherein The assembly structure also includes a control rod, which is detachably mounted on the manhole cover (3) for controlling the manhole cover (3) to rotate around the pivot (2).

5. The assembly of claim 1, wherein The assembly structure also includes: a railing edge, the edge of which fits the manhole cover (3) and is located between the manhole cover (3) and the root platform (1).

6. The assembly of claim 5, wherein, The railing is made of rubber.

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