Wind turbine tower maintenance platform, mast type maintenance platform system and wind turbine generator unit

Abstract

The present application relates to the field of wind power generation technology, and provides a wind turbine tower maintenance platform, a mast type maintenance platform system and a wind turbine generator unit. The maintenance platform comprises a lifting and rotating mechanism and a foldable platform. The lifting and rotating mechanism comprises a lifting frame and a rotating frame. The lifting frame is used to movably cover the outside of the mast in the wind turbine tower and is hoisted on the lower side of the lifting equipment capable of climbing along the mast. The rotating frame is rotatably covered on the outside of the lifting frame around a vertical axis. The foldable platform is arranged on one side of the rotating frame, used to carry the maintenance personnel and move the maintenance personnel to the side close to the wind turbine tower. The present application facilitates the maintenance personnel to maintain the butt joint of the adjacent two wind turbine towers based on the maintenance platform, which not only has low maintenance cost, but also is convenient to operate, improves the maintenance operation efficiency, and reduces the operation risk possibly existing in the maintenance process of the wind turbine tower.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, and in particular to a wind turbine tower maintenance platform, a mast-type maintenance platform system, and a wind turbine generator set. Background Technology

[0002] Currently, wind turbine towers (such as concrete towers or truss towers) are typically constructed layer by layer from bottom to top, with adhesive applied at the joints between adjacent tower layers. During daily use, due to prolonged alternating stress and the aging of the adhesive, maintenance personnel need to periodically inspect the joints between adjacent tower layers to prevent structural deterioration.

[0003] However, in practical applications, it has been found that there is no universal platform for maintenance personnel to inspect the joint between two adjacent wind turbine towers. With the rapid development of wind power generation technology, high-power wind turbines are becoming more and more common. As the requirements for the height of wind turbine towers become higher and higher, the maintenance of wind turbine towers is becoming more and more difficult. Existing maintenance methods usually have problems such as high maintenance costs, high operational difficulty, and significant safety risks. Summary of the Invention

[0004] This invention provides a wind turbine tower maintenance platform, a mast-type maintenance platform system, and a wind turbine generator set, which at least solves or improves the problems of high maintenance costs, high operational difficulty, and significant safety risks in the existing maintenance of wind turbine towers.

[0005] In a first aspect, the present invention provides a wind turbine tower maintenance platform, comprising: The lifting and slewing mechanism includes a lifting frame and a slewing frame. The lifting frame is movably fitted onto the outside of the mast inside the wind turbine tower and is hoisted onto the lower side of a lifting device capable of climbing along the mast. The slewing frame is rotatably fitted onto the outside of the lifting frame around a vertical axis. A foldable platform is located on one side of the rotating frame to carry maintenance personnel and move them to a side closer to the wind turbine tower.

[0006] According to the present invention, a wind turbine tower maintenance platform is provided, wherein a first notch is formed on one side of the lifting frame and a second notch is formed on one side of the rotating frame, and the size of the second notch is adapted to the size of the first notch; During the lifting and slewing mechanism's movement along the mast, the first notch and the second notch are positioned opposite each other, allowing the lifting and slewing mechanism to cross the support assembly located on one side of the mast.

[0007] According to the present invention, a wind turbine tower maintenance platform is provided in which, when the maintenance platform is in a transfer state, the first notch and the second notch are arranged opposite to each other, and the foldable platform is in a folded state on the lower side of the lifting device, so that the entire maintenance platform can follow the lifting device through the platform channel inside the wind turbine tower.

[0008] According to the present invention, a wind turbine tower maintenance platform is provided, wherein a rotary drive mechanism is provided between the lifting frame and the rotary frame; When the maintenance platform is in operation, the slewing drive mechanism can drive the slewing frame to rotate 360° relative to the lifting frame, and the foldable platform is in the unfolded state. The maintenance personnel can then reach the side near the wind turbine tower by passing through the slewing frame and the foldable platform in sequence.

[0009] According to the present invention, a wind turbine tower maintenance platform includes a rotary drive mechanism comprising: A C-shaped gear ring is provided on the lifting frame and is rotatably supported on the lower side of the C-shaped bearing ring of the rotating frame; Multiple gear drive components are disposed on the rotary frame, and during the rotation of the rotary frame relative to the lifting frame, at least one of the gear drive components meshes with the "C"-shaped gear ring.

[0010] According to the present invention, a wind turbine tower maintenance platform includes a gear drive component comprising: A gearbox is mounted on the slewing frame; A handwheel, which is connected to the input end of the gearbox; A transmission gear is connected to the output end of the gearbox and meshes with the "C"-shaped gear ring.

[0011] According to the wind turbine tower maintenance platform provided by the present invention, a slewing guide structure is further provided between the lifting frame and the slewing frame, the slewing guide structure comprising: A C-shaped guide ring is provided on the lifting frame; Multiple horizontal guide wheels are disposed on the rotary frame and arranged circumferentially on the rotary frame. The multiple horizontal guide wheels are located inside the "C"-shaped guide ring and are in rolling contact with the inner surface of the "C"-shaped guide ring.

[0012] According to the present invention, a wind turbine tower maintenance platform is provided, wherein the foldable platform comprises: The support arm is rotatably mounted on the slewing frame, and the support arm has a first climbing ladder structure along its extension direction, the first climbing ladder structure being used for maintenance personnel to climb. A drive assembly is disposed between the support arm and the slewing frame to drive the support arm to rotate relative to the slewing frame; The work platform is connected to the outrigger and is used to carry the maintenance personnel.

[0013] According to the present invention, a wind turbine tower maintenance platform includes a drive assembly comprising: The hoisting mechanism is installed on the rotary frame; Guide wheel assembly, mounted on the slewing frame; A cable is wound around the hoisting mechanism, the cable is wound around the guide wheel assembly, and is connected to the outrigger.

[0014] According to the present invention, a wind turbine tower maintenance platform includes a support arm comprising: The main boom and the connecting rod are arranged in parallel. The first end of the main boom and the first end of the connecting rod are rotatably connected to the slewing frame, and the second end of the main boom and the second end of the connecting rod are rotatably connected to the working platform. Multiple first step bars are arranged side by side along the extension direction of the main arm to form the first ladder structure; The slewing frame, the main boom, the connecting rod, and the working platform form a parallel four-bar linkage.

[0015] In a second aspect, the present invention also provides a mast-type maintenance platform system, comprising: Masts are used to be installed on the tower foundation and are vertically distributed within the wind turbine tower. A lifting device is movably mounted on the mast along the height direction of the mast; As described above, in the wind turbine tower maintenance platform, the lifting frame is hoisted to the lower side of the lifting equipment.

[0016] In a third aspect, the present invention also provides a wind turbine generator set, comprising: Wind turbine; A wind turbine tower, which is supported at the bottom of the wind turbine generator; The mast-type maintenance platform system described above is installed inside the wind turbine tower.

[0017] This invention provides a wind turbine tower maintenance platform, a mast-type maintenance platform system, and a wind turbine generator set. By setting a lifting and rotating mechanism based on a mast, and installing a foldable platform on one side of the rotating frame corresponding to the lifting and rotating mechanism, the lifting frame of the lifting and rotating mechanism, with its hoisting design below the lifting equipment, allows the lifting equipment to drive the entire lifting and rotating mechanism to move the foldable platform to different height positions. This eliminates the need to temporarily construct a maintenance platform for each section of the wind turbine tower, and also eliminates the need to use a suspended basket to hoist maintenance personnel during maintenance. Utilizing the rotating frame's ability to drive the foldable platform to rotate relative to the lifting frame, and the foldable platform's ability to switch between folded and extended states, maintenance personnel can reach the joint between any two adjacent wind turbine tower sections under the support of the foldable platform to perform circumferential maintenance work at the joint. This design not only reduces maintenance costs and facilitates operation, but also improves maintenance efficiency and reduces potential operational risks during wind turbine tower maintenance. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the wind turbine tower maintenance platform provided by the present invention, which is raised and lowered along the mast under the traction of the lifting equipment.

[0020] Figure 2 This is a schematic diagram of the structure of the wind turbine tower maintenance platform provided by the present invention, relative to the mast.

[0021] Figure 3 This is a schematic diagram of the lifting frame provided by the present invention, arranged relative to the mast.

[0022] Figure 4 This is a schematic diagram of the structure of the rotary frame provided by the present invention.

[0023] Figure 5 This invention provides Figure 2 A magnified view of a portion of point K1.

[0024] Figure 6 This invention provides Figure 2 A magnified view of a portion of point K2.

[0025] Figure 7 This is a schematic diagram of the mast-type maintenance platform system provided by the present invention installed inside the wind turbine tower.

[0026] Figure 8 This is a three-dimensional structural diagram of the mast provided by the present invention.

[0027] Figure 9 This is a top view of the mast structure provided by the present invention.

[0028] Figure 10 This is a three-dimensional structural schematic diagram of the standard truss section provided by the present invention.

[0029] Figure 11 This is a schematic diagram of the connection between the support component and the standard truss section provided by the present invention.

[0030] Figure 12 This invention provides Figure 11 A magnified view of a portion of section K3.

[0031] Figure label: 1. Mast; 101. Second Ladder Structure; 102. Guide Rail Structure; 103. Fixing Structure; 1031. First Fixing Hole; 1032. Second Fixing Hole; 1033. Third Fixing Hole; 11. Truss Standard Section; 111. Main Column; 11101. Insertion Part; 11102. Receiving Part; 112. Second Step; 113. Cross Bracing; 1131. Connecting Hole; 114. Diagonal Bracing; 115. Rack; 1101. Passageway; 1102. Manhole; 121. First Cable Clamp; 122. Second Cable Clamp; 131. Lighting System; 132. Sliding Contact Line; 133. Lifeline; 2. Support components; 21. First mounting base; 22. Second mounting base; 221. Hinge shaft; 222. Clamp; 23. Connecting bracket; 231. First frame; 232. Second frame; 2321. Adjusting rod; 3. Lifting and slewing mechanism; 31. Lifting frame; 310. First notch; 311. Guide wheel assembly; 32. Slewing frame; 320. Second notch; 321. "C"-shaped bearing ring; 33. Slewing drive mechanism; 331. "C"-shaped gear ring; 332. Gear drive component; 3321. Gearbox; 3322. Handwheel; 3323. Transmission gear; 34. Slewing guide structure; 341. "C"-shaped guide ring; 342. Horizontal guide wheel; 4. Foldable platform; 41. Support arm; 410. First ladder structure; 411. Main arm; 412. Connecting rod; 413. First footboard; 42. Drive assembly; 421. Hoisting mechanism; 422. Guide wheel assembly; 423. Cable; 43. Working platform; 431. Step platform; 4310. Opening; 432. Guardrail; 433. Flip-up door; 5. Traction component; 6. Lifting equipment; 601. Trigger switch; 7. Wind turbine tower; 701. Platform access; 8. Tower foundation; 9. Transfer platform. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0033] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the invention, and should not be construed as limiting the invention. Specific terminology used in this specification is for illustrative purposes only and is not intended to limit the illustrated embodiments. For example, expressions such as "same" and "identical" not only indicate a strictly identical state, but also indicate a state with tolerances or differences in the degree of functionality. For example, expressions indicating relative or absolute arrangement such as "in a certain direction," "along a certain direction," "side by side," "perpendicular," and "coaxial" not only strictly indicate such an arrangement, but also indicate a state of relative displacement by tolerances or angles or distances with the same degree of functionality.

[0034] The terms “length,” “width,” “up,” “down,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0035] Furthermore, features specified as "first" or "second" may explicitly or implicitly include one or more of those features. In the description of this invention, unless otherwise stated, "multiple" means two or more. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly specified. In the description of the embodiments of this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, B1 and / or B2 can represent: B1 existing alone, B1 and B2 existing simultaneously, and B2 existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] In related technologies, wind turbine towers typically consist of concrete towers or truss towers. In practical applications, depending on the type of wind turbine tower, different maintenance methods are used for the joints between adjacent tower layers, as detailed below: For truss tower sections, a maintenance platform is usually set up at the joint of each truss tower section so that workers can perform maintenance on the joint based on the maintenance platform, such as replacing the joint adhesive. This maintenance method requires the construction of a large number of maintenance platforms, which is costly.

[0038] For concrete tower sections, each section is 3-4 meters high. To save costs, a maintenance platform is usually not set up at the joint of each section. Instead, a suspended basket is set up inside the wind turbine tower. During maintenance, maintenance personnel are hoisted to the joint using the basket. This maintenance method is cumbersome and it is difficult to control the position of the basket stably, resulting in low maintenance efficiency. Maintenance personnel also face significant safety risks when working at height.

[0039] As can be seen from the above, there is currently no universal platform for maintenance personnel to inspect the joint between adjacent wind turbine towers, resulting in high maintenance costs, high operational difficulty, and significant safety risks in the existing maintenance methods.

[0040] To solve the above problems, the following will be combined with... Figures 1 to 12 The present invention describes a wind turbine tower maintenance platform, a mast-type maintenance platform system, and a wind turbine generator set.

[0041] In the first aspect, such as Figure 1 , Figure 2 and Figure 7 As shown, this embodiment of the invention provides a wind turbine tower maintenance platform, including a lifting and rotating mechanism 3 and a foldable platform 4. The lifting and rotating mechanism 3 includes a lifting frame 31 and a rotating frame 32. The lifting frame 31 is movably fitted onto the outside of the mast 1 inside the wind turbine tower 7 and is hoisted onto the lower side of a lifting device 6 that can climb along the mast 1. The rotating frame 32 is rotatably fitted onto the outside of the lifting frame 31 around a vertical axis. The foldable platform 4 is disposed on one side of the rotating frame 32 and is used to carry maintenance personnel and transfer maintenance personnel to the side closer to the wind turbine tower 7.

[0042] It is understandable that the mast 1 is installed vertically inside the wind turbine tower 7. The mast 1 is located near the center of the wind turbine tower 7. Based on the guiding effect of the mast 1, it can be ensured that the lifting frame 31 can be moved along the height direction of the mast 1.

[0043] When maintenance is required at the joint between two adjacent wind turbine towers 7, the lifting frame 31 is simply hoisted onto the lower side of the lifting device 6. The lifting device 6 drives the lifting frame 31 to move along the height direction of the mast 1. The lifting frame 31, through the slewing frame 32, moves the foldable platform 4 to different height positions. During maintenance, the maintenance personnel can reach the joint between the two adjacent wind turbine towers 7 at any height based on the foldable platform 4. Since the slewing frame 32 is rotatably mounted on the outside of the lifting frame 31 around the vertical axis, the slewing frame 32 can support the foldable platform 4 to rotate relative to the lifting frame 31, facilitating the circumferential movement of maintenance personnel under the support of the foldable platform 4 to perform maintenance operations at the joint between the two adjacent wind turbine towers 7.

[0044] In practical applications, such as Figure 3 and Figure 5 As shown, the mast 1 has a guide rail structure 102 formed along its height direction. For example, the guide rail structure 102 can be the main column on the side of the mast 1. In order to ensure that the lifting frame 31 moves stably along the height direction of the mast 1, the lifting frame 31 is also equipped with multiple sets of guide wheel sets 311. Each set of guide wheel sets 311 rolls in contact with the guide rail structure 102 along the extension direction of the guide rail structure 102. The mutual cooperation between the guide wheel sets 311 and the guide rail structure 102 establishes a horizontal constraint for the lifting frame 31, so that the lifting frame 31 is stably fitted on the outside of the mast 1 and will not detach from the mast 1 during the lifting movement.

[0045] Meanwhile, the slewing frame 32 is rotatably connected to the lifting frame 31 around a vertical axis. A slewing drive mechanism 33 is provided between the lifting frame 31 and the slewing frame 32, so that the slewing frame 32 is driven to rotate relative to the lifting frame 31 based on the slewing drive mechanism 33. The rotation angle of the slewing frame 32 can be arbitrarily switched between 0° and 360°. In this embodiment, the vertical axis can be the central axis of the mast 1 along its height direction.

[0046] The foldable platform 4 has a folded form and an extended form. When the foldable platform 4 is in the folded form, at least a portion of the foldable platform 4 is located near the rotating frame 32. When the foldable platform 4 is in the extended form, at least a portion of the foldable platform 4 is located near the inner wall of the wind turbine tower 7. This allows operators to inspect the joints between two adjacent wind turbine towers 7 (e.g., replace the joint adhesive) under the support of the foldable platform 4. At the same time, considering that the foldable platform 4 can switch between the folded and extended forms, the operators can also easily reach the joints of wind turbine towers 7 with different diameters for inspection operations, thus facilitating the inspection of all joints on the entire wind turbine tower 7.

[0047] It should be noted that multiple foldable platforms 4 can be set up, and multiple foldable platforms 4 are set at intervals along the circumference of the mast 1 on one side of the slewing frame 32. This design can support multiple maintenance personnel based on multiple foldable platforms 4, which facilitates collaborative work among multiple maintenance personnel and helps improve the maintenance efficiency of the wind turbine tower 7.

[0048] As can be seen from the above, the wind turbine tower maintenance platform shown in this invention, by setting a lifting and rotating mechanism 3 based on the mast 1, and setting a foldable platform 4 on one side of the rotating frame 32 corresponding to the lifting and rotating mechanism 3, and based on the hoisting design of the lifting frame 31 of the lifting and rotating mechanism 3 under the lifting equipment 6, can use the lifting equipment 6 to drive the entire lifting and rotating mechanism 3 to move the foldable platform 4 to different height positions. It is not necessary to temporarily build a maintenance platform for each section of the wind turbine tower 7, nor is it necessary to use a basket to hoist maintenance personnel during maintenance. By utilizing the characteristic that the rotating frame 32 can drive the foldable platform 4 to rotate relative to the lifting frame 31, and the characteristic that the foldable platform 4 can switch between folded and extended forms, it is ensured that maintenance personnel can reach the docking point of any two adjacent wind turbine towers 7 under the support of the foldable platform 4, so as to carry out maintenance work on the docking point in the circumferential direction. This design not only has low maintenance cost, but also convenient operation, improves maintenance work efficiency, and reduces the possible operational risks during the maintenance of the wind turbine tower 7.

[0049] In some embodiments, such as Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown, a first notch 310 is formed on one side of the lifting frame 31, and a second notch 320 is formed on one side of the rotating frame 32. The size of the second notch 320 is adapted to the size of the first notch 310. During the lifting and rotating mechanism 3's lifting and lowering along the mast 1, the first notch 310 and the second notch 320 are arranged opposite to each other so that the lifting and rotating mechanism 3 can cross the support component 2 set on one side of the mast 1.

[0050] It is understandable that the lifting frame 31 is a cylindrical frame with a first notch 310 formed on the side, and the rotating frame 32 is a cylindrical frame with a second notch 320 formed on the side. By adjusting the rotation position of the rotating frame 32 relative to the lifting frame 31, the first notch 310 of the lifting frame 31 can be made to face the second notch 320 of the rotating frame 32.

[0051] Since a support component 2 is provided between one side of the mast 1 and the inner wall of the wind turbine tower 7 to provide lateral support for the mast 1 and increase the longitudinal stability of the mast 1, when the first notch 310 and the second notch 320 are opposite each other, it can be ensured that the entire lifting and rotating mechanism 3 forms a vertically extending clearance channel on the side facing the support component 2. This ensures that the lifting and rotating mechanism 3 will not interfere with the support component 2 when it is lifting and lowering along the mast 1, but will directly cross the support component 2 set on one side of the mast 1 based on the clearance channel. This is beneficial for maintenance personnel to carry out maintenance on the docking positions of the wind turbine tower 7 at different heights based on the foldable platform 4 carried by the lifting and rotating mechanism 3.

[0052] In some embodiments, such as Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown, when the maintenance platform is in a transfer state, the first notch 310 and the second notch 320 are arranged opposite to each other, and the foldable platform 4 is in a folded state on the lower side of the lifting equipment 6 so that the entire maintenance platform can follow the lifting equipment 6 through the platform channel 701 inside the wind turbine tower 7.

[0053] It is understandable that the maintenance platform is in a transfer state, which means that the maintenance platform is raised and lowered along the mast 1 to adjust its height. This allows maintenance personnel to carry out maintenance work on the next docking point after completing the maintenance of the current docking point.

[0054] like Figure 7 As shown, after the wind turbine tower 7 is erected, at least one transfer platform 9 is installed inside the wind turbine tower 7. These transfer platforms 9 are arranged sequentially along the height direction of the mast 1, and each transfer platform 9 is provided with a platform passage 701. The transfer platform 9 can be set below the location where the support assembly 2 is to be installed, so that the workers can install the support assembly 2 between the mast 1 and the inner wall of the wind turbine tower 7.

[0055] When the maintenance platform is in the transfer state, not only is the relative arrangement of the first notch 310 and the second notch 320 used to prevent the lifting and rotating mechanism 3 from interfering with the support component 2 when it is lifting and lowering along the mast 1, but the foldable platform 4 is also set to be in a folded state under the lifting equipment 6. This allows full use of the space under the lifting equipment 6 for the foldable platform 4. This design also reduces the space occupied by the foldable platform 4 when the entire maintenance platform is transferred, ensuring the ability of the entire maintenance platform to follow the lifting equipment 6 through the platform channel 701.

[0056] It should be noted that when the maintenance platform is in the transfer state, the foldable platform 4 can also be arranged in a folded form on the side of the lifting and rotating mechanism 3 away from the support component 2. Thus, the maintenance platform will be compactly distributed under the lifting equipment 6 in the transfer state. Both the lifting equipment 6 and the foldable platform 4 are located on the side of the mast 1 away from the support component 2. Based on the relatively small platform channel 701, the passage requirements of the entire maintenance platform when moving up and down with the lifting equipment 6 can be met.

[0057] In some embodiments, such as Figure 1 and Figure 3 As shown, the maintenance platform also includes at least one traction component 5, which is used to be installed between the lifting frame 31 and the lifting device 6.

[0058] Understandably, when maintenance is required at the junction of two adjacent wind turbine towers 7, maintenance personnel can connect the lifting frame 31 to the lifting equipment 6 via at least one traction member 5. This allows the lifting equipment 6 to pull the lifting frame 31 up and down along the mast 1 via the traction member 5, and then the lifting frame 31 drives the foldable platform 4 to move up and down via the slewing frame 32.

[0059] By setting the traction member 5, it is not only convenient to hoist the lifting frame 31 to the lower side of the lifting equipment 6, but also to ensure that a accommodating area distributed along the height direction is formed between the lifting equipment 6 and the lifting frame 31, so as to accommodate the foldable platform 4 in the folded form based on the accommodating area.

[0060] In practical applications, to ensure that the lifting frame 31 moves stably under the drive of the lifting device 6, two traction components 5 can be provided. The two traction components 5 are arranged side by side and both extend along the height direction of the mast 1. The traction component 5 can be a tie rod or a traction rope (such as a steel wire rope), and there is no specific limitation on the latter.

[0061] In some embodiments, such as Figure 1As shown, a trigger switch 601 is provided at the bottom of the lifting device 6. The trigger switch 601 is used to detect the foldable platform 4. When the maintenance platform is lowered to the lower limit position in the transfer state, if the trigger switch 601 is triggered by the foldable platform 4, the lifting device 6 will stop moving according to the trigger signal of the trigger switch 601 to avoid the lifting device 6 from continuing to descend and colliding with the maintenance platform.

[0062] In some embodiments, such as Figure 2 and Figure 6 As shown, a slewing drive mechanism 33 is provided between the lifting frame 31 and the slewing frame 32. When the maintenance platform is in operation, the slewing drive mechanism 33 can drive the slewing frame 32 to rotate 360° relative to the lifting frame 31, and the foldable platform 4 is in the unfolded state. Maintenance personnel can reach the side near the wind turbine tower 7 by passing through the slewing frame 32 and the foldable platform 4 in sequence.

[0063] It is understandable that the maintenance platform is in working condition, which means that the maintenance platform is not moving up and down along the mast 1, but is based on the foldable platform 4 to support maintenance personnel to carry out maintenance on the docking point of two adjacent wind turbine towers 7.

[0064] In practical applications, although the side of the lifting frame 31 has a first notch 310 and the side of the slewing frame 32 has a second notch 320, by optimizing the slewing drive mechanism 33 between the lifting frame 31 and the slewing frame 32, the slewing frame 32 can be driven to rotate 360° relative to the lifting frame 31 based on the slewing drive mechanism 33. This allows the foldable platform 4 to carry maintenance personnel to rotate 360° in its unfolded form, ensuring the working range of maintenance personnel, so that maintenance personnel can carry out maintenance at any position of the docking point of two adjacent wind turbine towers 7 along the circumference.

[0065] In some embodiments, such as Figure 4 and Figure 6 As shown, the rotary drive mechanism 33 includes a C-shaped gear ring 331 and a plurality of gear drive members 332; the C-shaped gear ring 331 is disposed on the lifting frame 31 and is rotatably supported on the lower side of the C-shaped bearing ring 321 of the rotary frame 32; the plurality of gear drive members 332 are disposed on the rotary frame 32, and during the rotation of the rotary frame 32 relative to the lifting frame 31, at least one gear drive member 332 meshes with the C-shaped gear ring 331.

[0066] It is understandable that both the "C"-shaped gear ring 331 and the "C"-shaped bearing ring 321 are roughly "C"-shaped structures. The "C"-shaped gear ring 331 is rotatably supported on the lower side of the "C"-shaped bearing ring 321 to bear the vertical load from the slewing frame 32. The "C"-shaped bearing ring 321 can be made of graphite gaskets known in the art. Graphite gaskets have a low coefficient of friction and can act as sliding bearings, which helps to reduce the contact friction force of the "C"-shaped gear ring 331 when rotating relative to the "C"-shaped bearing ring 321.

[0067] Considering that the "C"-shaped gear ring 331 is fixedly mounted on the lifting frame 31, and that the "C"-shaped gear ring 331 has an open side, this embodiment provides multiple gear drive components 332 on the rotating frame 32. During the rotation of the multiple gear drive components 332 along with the rotating frame 32, if one of the gear drive components 332 moves to the open side of the "C"-shaped gear ring 331, causing it to separate from the "C"-shaped gear ring 331, it can be ensured that other gear drive components 332 remain engaged with the "C"-shaped gear ring 331. This facilitates the use of the rotational torque output by these gear drive components 332 to continuously drive the rotating frame 32 to rotate relative to the lifting frame 31. For example, Figure 4 As shown, in order to simplify the rotary drive operation, two gear drive components 332 can be specifically set. The central angle of the two gear drive components 332 relative to the rotation center of the rotary frame 32 should be greater than the central angle of the two ends of the open end of the "C" type gear ring 331 relative to the rotation center of the rotary frame 32.

[0068] In some embodiments, such as Figure 4 and Figure 6 As shown, the gear drive unit 332 includes a gearbox 3321, a handwheel 3322, and a transmission gear 3323; the gearbox 3321 is disposed on the rotary frame 32, the handwheel 3322 is connected to the input end of the gearbox 3321, and the transmission gear 3323 is connected to the output end of the gearbox 3321 and meshes with the "C" type gear ring 331.

[0069] Understandably, by incorporating the gear drive unit 332 into the gearbox 3321, handwheel 3322, and transmission gear 3323, maintenance personnel can stand on the rotating frame 32 and manually control the handwheel 3322 to rotate. The handwheel 3322 drives the transmission gear 3323 to rotate via the gearbox 3321. Based on the meshing arrangement between the transmission gear 3323 and the "C"-shaped gear ring 331, the transmission gear 3323 can roll circumferentially along the "C"-shaped gear ring 331, thereby achieving the purpose of driving the rotating frame 32 to rotate relative to the lifting frame 31 based on the gear drive unit 332. The gearbox 3321 can be a gear reducer known in the art.

[0070] In some embodiments, such as Figure 2 , Figure 3 and Figure 5 As shown, a rotation guide structure 34 is also provided between the lifting frame 31 and the rotating frame 32. The rotation guide structure 34 includes a "C"-shaped guide ring 341 and multiple horizontal guide wheels 342. The "C"-shaped guide ring 341 is provided on the lifting frame 31, and the multiple horizontal guide wheels 342 are provided on the rotating frame 32. They are arranged circumferentially on the rotating frame 32. The multiple horizontal guide wheels 342 are located inside the "C"-shaped guide ring 341 and are in rolling contact with the inner surface of the "C"-shaped guide ring 341.

[0071] It is understandable that by setting a slewing guide structure 34 between the lifting frame 31 and the slewing frame 32, it is not only convenient to guide the slewing frame 32 to rotate relative to the lifting frame 31 using the slewing guide structure 34, but also to establish a horizontal constraint between the lifting frame 31 and the slewing frame 32 based on the slewing guide structure 34 to bear all lateral loads on the slewing frame 32.

[0072] In practical applications, by setting the slewing guide structure 34 to include a “C”-shaped guide ring 341 and multiple horizontal guide wheels 342, the smoothness of the slewing frame 32’s rotation relative to the lifting frame 31 can be ensured based on the rolling contact between each horizontal guide wheel 342 and the inner wall surface of the “C”-shaped guide ring 341. Furthermore, since each horizontal guide wheel 342 abuts against the inner wall surface of the “C”-shaped guide ring 341, the slewing frame 32’s side tipping during rotation relative to the lifting frame 31 is effectively prevented.

[0073] like Figure 2 and Figure 3 As shown, in order to further ensure the stability of the rotation of the slewing frame 32 relative to the lifting frame 31, two sets of slewing guide structures 34 are provided. The slewing drive mechanism 33 is located between the two sets of slewing guide structures 34 along the height direction of the mast 1.

[0074] In some embodiments, such as Figure 2 As shown, the foldable platform 4 includes a support arm 41, a drive assembly 42, and a work platform 43. The support arm 41 is rotatably mounted on the slewing frame 32, and a first ladder structure 410 is formed along its extension direction for maintenance personnel to climb. The drive assembly 42 is disposed between the support arm 41 and the slewing frame 32 to drive the support arm 41 to rotate relative to the slewing frame 32. The work platform 43 is connected to the support arm 41 and is used to support maintenance personnel.

[0075] Understandably, the drive assembly 42 is used to drive the outrigger 41 to rotate the work platform 43 relative to the slewing frame 32, so as to switch the entire foldable platform 4 between the folded and extended forms.

[0076] In practical applications, such as Figure 2 and Figure 4 As shown, the bottom of the slewing frame 32 is provided with a hinge ear J, the first end of the support arm 41 is rotatably connected to the hinge ear J, and the second end of the support arm 41 is connected to the working platform 43. The drive assembly 42 can be a telescopic rod or rope traction device known in the art, and there is no specific limitation thereto.

[0077] When the foldable platform 4 is in the folded state, the support arm 41 drives the working platform 43 to rotate to a position close to the slewing frame 32. At this time, the support arm 41 can be in a vertically distributed state. When the foldable platform 4 is in the extended state, the support arm 41 drives the working platform 43 to rotate to a position close to the wind turbine tower 7. At this time, the support arm 41 can be in an inclined upward distributed state. Maintenance personnel can climb the first ladder structure 410 from the slewing frame 32 to the working platform 43, and then carry out maintenance on the connection between two adjacent wind turbine towers 7 based on the working platform 43.

[0078] In some scenarios, when the foldable platform 4 is in the extended state, maintenance personnel on the lifting equipment 6 can also reach the work platform 43 via the lifting and rotating mechanism 3 and the first climbing structure 410 on the support arm 41. At this time, the work platform 43 is horizontally distributed so that maintenance personnel can stand stably on the work platform 43 to carry out maintenance work.

[0079] In some embodiments, such as Figure 1 , Figure 2 and Figure 4 As shown, the drive assembly 42 includes a winch mechanism 421, a guide wheel assembly 422, and a cable 423; the winch mechanism 421 and the guide wheel assembly 422 are respectively disposed on the slewing frame 32, the cable 423 is wound around the winch mechanism 421, the cable 423 is wound around the guide wheel assembly 422, and is connected to the support arm 41.

[0080] Understandably, the winch mechanism 421 rotates to adjust the length of the cable 423 used to traction the boom 41, and the guide wheel assembly 422 is used to complete the arrangement of the cable 423 between the winch mechanism 421 and the boom 41, and to change the traction direction of the traction force on the cable 423.

[0081] In practical applications, when the hoisting mechanism 421 rotates in the first direction to wind up the cable 423, the cable 423, guided by the guide wheel assembly 422, pulls the support arm 41 to flip toward the side closer to the slewing frame 32, so that the entire foldable platform 4 switches to the folded form; when the hoisting mechanism 421 rotates in the second direction to unwind the cable 423, the cable 423, guided by the guide wheel assembly 422, pulls the support arm 41 to flip toward the side away from the slewing frame 32, so that the entire foldable platform 4 switches to the extended form.

[0082] It should be noted that the winch mechanism 421 and the guide wheel assembly 422 can be positioned along the height of the slewing frame 32, with the winch mechanism 421 located below the guide wheel assembly 422. The height of the winch mechanism 421 is higher than the height of the maintenance personnel standing on the foot platform of the slewing frame 32. For example, the height of the winch mechanism 421 relative to the foot platform of the slewing frame 32 is greater than 2 meters. This design facilitates the use of the drive assembly 42 to drive the support arm 41 to rotate at a large angle relative to the slewing frame 32, while avoiding the drive assembly 42 occupying the internal space of the slewing frame 32. This allows maintenance personnel to pass through the first ladder structure 410 on the slewing frame 32 and the support arm 41 to reach the work platform 43.

[0083] In some embodiments, such as Figure 1 and Figure 4 As shown, the guide wheel assembly 422 includes two guide wheels, which are arranged side by side on the top of the slewing frame 32; two cables 423 are provided, which are arranged side by side, with the first ends of the two cables 423 wound around the hoisting mechanism 421, and the two cables 423 are wound one-to-one around the two guide wheels, and the second ends of the two cables 423 are respectively connected to the middle of the support arm 41.

[0084] In some embodiments, such as Figure 2 As shown, the support arm 41 includes a main arm 411, a connecting rod 412, and a plurality of first footplates 413. The main arm 411 and the connecting rod 412 are arranged in parallel. The first end of the main arm 411 and the first end of the connecting rod 412 are respectively rotatably connected to the slewing frame 32, and the second end of the main arm 411 and the second end of the connecting rod 412 are respectively rotatably connected to the working platform 43. The plurality of first footplates 413 are arranged side by side along the extension direction of the main arm 411 to form a first climbing ladder structure 410. The slewing frame 32, the main arm 411, the connecting rod 412, and the working platform 43 form a parallel four-bar linkage mechanism.

[0085] Understandably, by configuring the slewing frame 32, main boom 411, connecting rod 412, and working platform 43 as a parallel four-bar linkage, the drive assembly 42 can not only drive the outrigger 41 to rotate relative to the slewing frame 32 to adjust the shape of the parallel four-bar linkage and realize the switching of the entire foldable platform 4 between folded and extended states, but also ensure that the outrigger 41 can adaptively fold and unfold. Specifically, when the outrigger 41 is folded, the main boom 411 and connecting rod 412 move closer together; when the outrigger 41 is unfolded, the main boom 411 and connecting rod 412 separate.

[0086] During the configuration switching process of the parallel four-bar linkage, the spacing between adjacent first step bars 413 remains unchanged, ensuring the structural stability of the first ladder structure 410 formed based on the first step bars 413. Furthermore, the work platform 43 remains horizontal throughout the configuration switching process, facilitating maintenance personnel to perform operations on the work platform 43. Two support arms 41 can be configured, with multiple first step bars 413 arranged side-by-side between the corresponding main arms 411 of the two support arms 41.

[0087] In some embodiments, such as Figure 2 As shown, the support arm 41 can also be equipped with a folding guardrail. The folding guardrail is connected to the support arm 41 and is approximately a parallelogram structure. The folding guardrail can switch states with the support arm 41; that is, the folding guardrail is in a folded state when the support arm 41 is folded and in an unfolded state when the support arm 41 is unfolded. Regardless of the state of the parallel four-bar linkage, the top edge of the folding guardrail remains parallel to the support arm 41.

[0088] In some embodiments, such as Figure 2 As shown, the work platform 43 includes a stepping platform 431, a guardrail 432, and a flip door 433. The guardrail 432 is installed on the stepping platform 431 and is arranged around the perimeter of the stepping platform 431. An opening 4310 is formed on the side of the stepping platform 431 facing the support arm 41. The flip door 433 is rotatably installed on the stepping platform 431 to open or close the opening 4310.

[0089] In practical applications, the flip door 433 can be configured to flip upward relative to the step platform 431 to open the opening 4310, at which time maintenance personnel can reach the step platform 431 of the work platform 43 via the first ladder structure 410; the flip door 433 can also be configured to flip downward relative to the step platform 431 to close the opening 4310, at which time the flip door 433 can also serve as the step platform 431 so that maintenance personnel can stand.

[0090] In the second aspect, such as Figure 1 and Figure 7 As shown, this embodiment of the invention also provides a mast-type maintenance platform system, including a mast 1, a lifting device 6, and a wind turbine tower maintenance platform as described above; the mast 1 is used to be installed on the tower foundation 8 and is vertically distributed inside the wind turbine tower 7; the lifting device 6 is movably installed on the mast 1 along the height direction of the mast 1; the lifting frame 31 is hoisted on the lower side of the lifting device 6.

[0091] Understandably, mast 1 can be a truss structure and configured as a cubic column (e.g., mast 1 has a cuboid structure). Specifically, mast 1 can be a steel truss structure, which gives mast 1 good load-bearing capacity. The bottom end of mast 1 can be connected to the tower foundation 8 using fasteners such as bolts, and the tower foundation 8 provides stable support to mast 1 to bear the vertical load from mast 1.

[0092] The lifting device 6 is used to transport personnel or materials. The lifting device 6 can be a tower hoist known in the art. Depending on the transmission method, the tower hoist can be a rack and pinion hoist or a wire rope guide hoist, and no specific limitation is made.

[0093] Since the mast-type maintenance platform system includes a wind turbine tower maintenance platform, and the specific structure of the wind turbine tower maintenance platform refers to the above embodiments, the mast-type maintenance platform system of this embodiment includes all the technical solutions of the above embodiments. Therefore, it has at least all the beneficial effects obtained by all the technical solutions of the above embodiments, which will not be described in detail here.

[0094] In some embodiments, such as Figure 8 and Figure 9 As shown, the mast 1 has a second climbing structure 101, a guide rail structure 102, and a fixing structure 103. The second climbing structure 101, the guide rail structure 102, and the fixing structure 103 are all distributed along the height direction of the mast 1. The second climbing structure 101 is used for maintenance personnel to climb, the guide rail structure 102 is used to guide the lifting frame 31 and the lifting equipment 6 to rise and fall, and the fixing structure 103 is used to fix the accessories extending along the height direction of the mast 1.

[0095] Understandably, since the mast 1 has a second climbing ladder structure 101, a guide rail structure 102, and a fixing structure 103, a multi-functional integrated design can be achieved based on the mast 1. This allows the mast 1 to integrate climbing ladder functions, guiding functions for the lifting frame 31 and the lifting equipment 6, and carrying functions for various accessories. Personnel and / or materials can be lifted and lowered by the lifting equipment 6. Maintenance personnel can also reach the second climbing ladder structure 101 from the lifting equipment 6 to perform maintenance on the accessories carried by the mast 1. In an emergency, the second climbing ladder structure 101 can also serve as an emergency passage for maintenance personnel to quickly move down to the tower foundation 8.

[0096] In some embodiments, such as Figure 8 and Figure 9As shown, the fixing structure 103 can be a first fixing hole 1031, a second fixing hole 1032, and a third fixing hole 1033 formed on the side wall of the mast 1. The first fixing hole 1031 is used to install the first cable clamp 121, and the wind turbine power cable can be installed based on the first cable clamp 121. The second fixing hole 1032 is used to install the second cable clamp 122, and the power supply and communication cable can be installed based on the second cable clamp 122. The third fixing hole 1033 is used to install the lighting system 131, such as a lighting fixture.

[0097] In some embodiments, such as Figure 8 and Figure 9 As shown, the accessory also includes a sliding contact line 132, which can be configured to extend along the extension direction of the second ladder structure 101. The sliding contact line 132 is electrically connected to the power supply and is configured to slide in contact with the power taking part (e.g., brush) on the lifting device 6, so that the lifting device 6 that moves up and down along the mast 1 can be powered based on the sliding contact line 132.

[0098] In some embodiments, such as Figure 8 and Figure 10 As shown, the mast 1 includes multiple truss standard sections 11, which are connected sequentially from bottom to top along the height direction.

[0099] It is understandable that, such as Figure 7 and Figure 8 As shown, along the height direction, the bottom end of a truss standard section 11 located at the bottom is connected to the tower foundation 8, and the bottom end of a truss standard section 11 located above is connected to the top end of a truss standard section 11 located below, so that multiple truss standard sections 11 can be connected sequentially along the height direction. This design is simple and convenient to operate, and can be used to build each truss standard section 11 sequentially from bottom to top as the wind turbine tower 7 is built upward, so as to provide an operating platform for the construction of each layer of wind turbine tower 7. Furthermore, the entire mast 1 constructed forms a truss structure with good stability and strong load-bearing capacity.

[0100] It should be noted that each truss standard section 11 can be configured as a cubic truss structure, and the mast 1 formed by stacking multiple truss standard sections 11 forms a cubic column; each truss standard section 11 has a second climbing structure 101, a guide rail structure 102 and a fixing structure 103; when multiple truss standard sections 11 are connected sequentially along the height direction, the second climbing structure 101 and guide rail structure 102 corresponding to each truss standard section 11 are connected sequentially along the height direction, and the fixing structure 103 corresponding to each truss standard section 11 is arranged sequentially along the height direction.

[0101] In some embodiments, such as Figure 8As shown, the mast 1 also has a rack 115, which extends along the height direction of the mast 1 and is used to mesh with the drive gear of the lifting device 6.

[0102] It is understandable that when the mast 1 includes multiple truss standard sections 11, each truss standard section 11 is formed with a rack 115, and the racks 115 corresponding to the multiple truss standard sections 11 are connected sequentially along the height direction.

[0103] As the wind turbine tower 7 is assembled layer by layer, the mast 1 is built from bottom to top. The rack 115 can serve as part of the mast 1 to transmit the vertical load on the mast 1, guide the lifting equipment 6 to move along the height direction of the mast 1, and cooperate with the drive gear of the lifting equipment 6 to convert the rotational motion of the gear into the linear motion of the lifting equipment 6. At the same time, the rack 115 and the gear meshing point together resist the gravity load of the lifting equipment 6.

[0104] In some embodiments, such as Figure 8 As shown, at least one of the guide rail structure 102 and the rack 115 is used to guide the lifting device 6 to move in the height direction, and the rack 115 meshes with the drive gear of the lifting device 6.

[0105] Understandably, on one side of the mast 1, the guide rail structure 102 and the rack 115 are arranged side by side along the width direction of the lifting device 6. The guide rail structure 102 can be configured to guide the lifting device 6 to move in the height direction, while the rack 115 meshes with the drive gear of the lifting device 6 to provide driving force for the lifting movement of the lifting device 6. Of course, in some scenarios, the rack 115 can also be used as a guide rail. For example, the guide rail structure 102 and the rack 115 can be used together to guide the lifting device 6 to move in the height direction, ensuring the stability of the lifting device 6 as it moves along the mast 1.

[0106] In some embodiments, such as Figure 9 and Figure 10 As shown, a passageway 1101 is formed inside the mast 1, which runs through the mast 1 along the height direction to allow maintenance personnel to move up and down along the second ladder structure 101. The second ladder structure 101, the guide rail structure 102 and the fixing structure 103 are respectively formed on the side of the mast 1. A manhole 1102 is formed on the side of the mast 1, which is used for maintenance personnel to pass through and enter the passageway 1101.

[0107] Understandably, since the mast 1 is composed of multiple truss standard sections 11 connected sequentially from bottom to top along the height direction, each truss standard section 11 has a passageway 1101 formed within it, and each truss standard section 11 has a manhole 1102 on its side that communicates with the passageway 1101. When multiple truss standard sections 11 are connected sequentially along the height direction, the passageways 1101 within the multiple truss standard sections 11 are connected sequentially, which creates a vertically connected passageway within the entire mast 1. Maintenance personnel can enter the passageway 1101 through the manhole 1102 of any truss standard section 11, and then climb up and down along the second ladder structure 101 to reach the actual maintenance position required.

[0108] Since the second climbing structure 101, the guide rail structure 102 and the fixed structure 103 are respectively formed on the side of the truss standard section 11, and the maintenance personnel climb along the second climbing structure 101 inside the truss standard section 11, the maintenance personnel are close to the various accessories fixed by the fixed structure 103, which makes it convenient for the maintenance personnel to carry out maintenance on these accessories in the passageway 1101.

[0109] In some application scenarios, such as when the lifting equipment 6 malfunctions, maintenance personnel can reach the manhole 1102 through the top platform of the lifting equipment 6, and then enter the passageway 1101 through the manhole 1102. At this time, personnel can either climb up the second climbing structure 101 to repair the relevant accessories, or use the second climbing structure 101 as an emergency passage to quickly reach the ground.

[0110] In some embodiments, such as Figure 9 As shown, in order to ensure the safety of maintenance personnel climbing, the mast 1 is equipped with a lifeline 133, which is configured to extend along the extension direction of the second ladder structure 101.

[0111] It is understandable that the lifeline 133 can be installed either on the outside of the mast 1 or in the passageway 1101 on the inside of the mast 1; there is no specific limitation on this. Figure 9 The illustration shows the lifeline 133 located inside the mast 1 and positioned along the extension direction of the second ladder structure 101.

[0112] Lifeline 133 is used to slide with the fall arrestor worn by maintenance personnel. When maintenance personnel are climbing up and down the second ladder structure 101 normally (e.g., climbing speed is lower than the set value), the fall arrestor will slide up and down normally along lifeline 133. When maintenance personnel experience a sudden drop, such as when the drop speed is higher than the set value, the centrifugal trigger mechanism or cam mechanism inside the fall arrestor will lock instantly due to the sudden speed change. This will put the fall arrestor in a locked state immediately and lock it with lifeline 133 to provide safety protection for maintenance personnel.

[0113] In practical applications, the lifeline 133 is installed in the passageway 1101 inside the mast 1, facilitating the safe climbing of maintenance personnel along the second ladder structure 101 within the passageway 1101 to inspect various accessories. The lifeline 133 can be a guide rail groove, with multiple locking slots along its extension direction at the bottom. The bottom of the guide rail groove is connected to the second ladder structure 101, and the groove opening faces the inside of the truss standard section 11. This design ensures that the lifeline 133 is a rigid structure, solving the problems of swaying and tangling that easily occur with traditional flexible lifelines 133 (such as steel wire ropes) during use.

[0114] Meanwhile, the fall arrestor can be a slider-type fall arrestor, in which the guide wheel assembly is movably mounted in the guide rail groove. When maintenance personnel are climbing up and down the second ladder structure 101 normally, the slider mechanism of the slider-type fall arrestor separates from the locking port of the guide rail groove. However, when the maintenance personnel experience a loss of speed and fall, the slider mechanism of the slider-type fall arrestor locks into place with the locking port of the guide rail groove to prevent the maintenance personnel from continuing to fall.

[0115] In some embodiments, such as Figure 10 As shown, the truss standard section 11 includes multiple main columns 111, multiple second steps 112, and multiple cross braces 113. The multiple main columns 111 are arranged circumferentially, and each main column 111 extends along the height direction, wherein two adjacent main columns 111 form part of the guide rail structure 102. The multiple second steps 112 are sequentially arranged along the height direction between two adjacent main columns 111 that form the guide rail structure 102, so as to form part of the second ladder structure 101. One of the two adjacent main columns 111 of the guide rail structure 102 can be replaced by a rack 115, or the side wall of one of the two adjacent main columns 111 of the guide rail structure 102 can be provided with an integrated rack 115. The multiple cross braces 113 are arranged between any two adjacent main columns 111 other than the plane where the second ladder structure 101 is located, and the cross braces 113 are provided with a fixing structure 103.

[0116] It is understood that the main column 111 can be a circular column or a square column, without specific limitations. The main column 111 not only serves as the core load-bearing part of the truss standard section 11, but also as the guide rail structure 102 for guiding the lifting equipment 6 to rise and fall. Multiple main columns 111, combined with multiple second steps 112 and multiple cross braces 113, realize the construction of the entire truss standard section 11, ensuring that the entire truss standard section 11 has a compact structure, strong structural strength, and can reliably guide the lifting equipment 6 to rise and fall. The truss standard section 11 can be formed into an integral welded component based on the main columns 111, second steps 112 and cross braces 113.

[0117] Meanwhile, when multiple truss standard sections 11 are stacked sequentially along the height direction, the main columns 111 corresponding to the multiple truss standard sections 11 are connected one by one along the height direction. This design can ensure that the vertical load is transferred sequentially from top to bottom along the main columns 111 corresponding to each truss standard section 11, which is beneficial to ensuring the stability of the entire mast 1 structure and has good load-bearing capacity.

[0118] Since multiple second step rods 112 are sequentially arranged along the height direction between two adjacent main columns 111 that serve as guide rail structure 102, the second ladder structure 101 formed by multiple second step rods 112 can be used as part of the entire truss standard section 11. This design not only ensures the structural strength of the entire truss standard section 11, but also reduces the problems of increased volume and structural bulkiness caused by the additional second ladder structure 101 to the truss standard section 11.

[0119] Furthermore, by setting a fixing structure 103 on each cross brace 113, such as the fixing structure 103 including the first fixing hole 1031, the second fixing hole 1032 and the third fixing hole 1033 shown in the above embodiment, this design facilitates the use of the fixing function of the fixing structure 103 to arrange related accessories along the standard section 11 of the truss.

[0120] As can be seen from the above, based on the structural design of the truss standard section 11, each truss standard section 11 integrates the function of the second climbing structure 101, the guiding function of the lifting equipment 6, and the bearing function of various accessories. Therefore, when multiple truss standard sections 11 are stacked sequentially along the height direction, it can be ensured that the second climbing structure 101 and the guide rail structure 102 extending along the height direction are naturally formed on the stacked mast 1, as well as the fixed structure 103 arranged along the height direction.

[0121] In some embodiments, such as Figure 10 As shown, in order to further enhance the structural strength of the entire truss standard section 11, the truss standard section 11 also includes diagonal bracing 114, which is disposed between any two adjacent horizontal bracings 113 and / or between any adjacent main column 111 and horizontal bracing 113, except in the plane where the second ladder structure 101 is located.

[0122] In practical applications, since multiple main columns 111 are arranged circumferentially, a passageway 1101 can be formed on the inner side of the truss standard section 11 built based on multiple main columns 111. The main columns 111, combined with multiple second step rods 112, multiple cross braces 113 and multiple diagonal braces 114, form a connecting structure to serve as the side wall of the truss standard section 11. A manhole 1102 for workers to enter and exit the passageway 1101 can be formed on this side wall based on two diagonal braces 114 and one main column 111.

[0123] For any given truss standard section 11, which can be a cubic truss structure, four main columns 111 are provided. Several second steps 112 and several cross braces 113 are arranged on these four main columns 111. The four main columns 111 are located at the four corners of the truss standard section 11. Several second steps 112 are located between two main columns 111 on the first side of the truss standard section 11. For the other sides of the truss standard section 11, the cross braces 113 and diagonal braces 114 can be adaptively configured according to actual application requirements.

[0124] like Figure 8 and Figure 9 As shown, when the standard truss section 11 is a cubic truss structure, a sliding contact line 132 can be installed on the first side of the standard truss section 11, a manhole 1102 for personnel access passage 1101 can be installed on the second side of the standard truss section 11, a fan power cable can be installed on the third side of the standard truss section 11 through a first cable clamp 121, and power supply and communication cables can be installed on the fourth side of the standard truss section 11 through a second cable clamp 122. A lighting system 131 can also be directly installed on the fourth side of the standard truss section 11. The first side of the standard truss section 11 is perpendicular to the second and third sides, the second side is parallel to the third side, and the first side is parallel to the fourth side.

[0125] In some embodiments, such as Figure 8 and Figure 10 As shown, the bottom end of the main column 111 of the upper truss standard section 11 is inserted into the top end of the main column 111 of the lower truss standard section 11; the cross brace 113 at the bottom end of the upper truss standard section 11 is opposite to the cross brace 113 at the top end of the lower truss standard section 11 along the height direction and is connected by a locking structure.

[0126] Understandably, by inserting the bottom end of the main column 111 of the upper truss standard section 11 into the top end of the main column 111 of the lower truss standard section 11, it is convenient to connect the main columns 111 corresponding to each truss standard section 11 sequentially from bottom to top along the height direction, ensuring that these main columns 111 are coaxially distributed along the height direction, and that two adjacent main columns 111 form constraints along the horizontal direction, so as to better transfer vertical loads based on these main columns 111.

[0127] For example, such as Figure 10As shown, along the height direction, the top of the main column 111 has a plug-in portion 11101, and the bottom of the main column 111 has a receiving portion 11102. The plug-in portion 11101 of the main column 111 of the lower truss standard section 11 is used to insert into the receiving portion 11102 of the main column 111 of the upper truss standard section 11, so that the two adjacent main columns 111 form a plug-in fit. Exemplarily, the plug-in portion 11101 can be a protrusion, and the receiving portion 11102 can be a groove adapted to the protrusion; wherein, the shape of the protrusion can be cylindrical or cubic, and there is no specific limitation thereto.

[0128] At the same time, by aligning the horizontal brace 113 at the bottom of the upper truss standard section 11 with the horizontal brace 113 at the top of the lower truss standard section 11 along the height direction and connecting them with locking components, a stable connection between the two adjacent upper and lower truss standard sections 11 can be further achieved.

[0129] In practical applications, such as Figure 10 As shown, the locking structure may include a locking bolt and a connecting hole 1131, wherein the locking bolt is in Figure 10 Not shown in the diagram; the cross brace 113 at the bottom of the upper truss standard section 11 and the cross brace 113 at the top of the lower truss standard section 11 can both be provided with corresponding connecting holes 1131 along the height direction. Each cross brace 113 can be provided with multiple connecting holes 1131. The multiple connecting holes 1131 of the upper cross brace 113 and the multiple connecting holes 1131 of the lower cross brace 113 are arranged one-to-one. The upper and lower corresponding cross braces 113 can be connected into one unit by locking bolts passing through the upper and lower corresponding connecting holes 1131.

[0130] In some embodiments, such as Figure 7 and Figure 11 As shown, the wind turbine mast 1 type working platform 43 system of the present invention further includes at least one support component 2, which is adjustablely disposed between the mast 1 and the inner wall of the wind turbine tower 7.

[0131] Understandably, in the wind power industry, lifting equipment is typically guided up and down using ladders and guide rails inside the wind turbine tower, and workers also use these ladders and guide rails to move up and down. These ladders and guide rails are mainly attached to the inner wall of the wind turbine tower using numerous connectors (such as embedded parts or welded parts). This structural design requires a large number of connectors, resulting in high costs. Furthermore, the contraction of the wind turbine tower after tensioning can cause the ladders and guide rails to twist and deform, affecting the normal operation of the lifting equipment.

[0132] In this invention, since the mast 1 is connected to the inner wall of the wind turbine tower 7 via at least one support component 2, this design utilizes the lateral support provided by the support component 2 to prevent lateral displacement of the mast 1 within the wind turbine tower 7. This helps to shorten the slenderness ratio of the mast 1, increasing its longitudinal stability while ensuring its load-bearing capacity. Compared to existing ladder rail construction designs, this embodiment eliminates the need for numerous connectors (e.g., embedded parts or welded parts) between the mast 1 and the inner wall of the wind turbine tower 7, allowing the mast 1 to be stably installed vertically within the wind turbine tower 7, effectively reducing construction costs. In particular, during the tensioning of the wind turbine tower 7, the support component 2 can adaptively adjust to the tensioning and contraction of the wind turbine tower 7, providing lateral support while effectively preventing the mast 1 from twisting and deforming due to the tensioning and contraction of the wind turbine tower 7, ensuring that the lifting device 6 can operate normally along the mast 1.

[0133] In some embodiments, such as Figure 11 As shown, the support assembly 2 includes a first mounting base 21, a second mounting base 22, and a connecting bracket 23; the first mounting base 21 is used to connect to the inner wall of the wind turbine tower 7; the second mounting base 22 is connected to the mast 1; the connecting bracket 23 is movably disposed between the first mounting base 21 and the second mounting base 22, and the connecting bracket 23 can move relative to at least one of the first mounting base 21 and the second mounting base 22 in the height direction.

[0134] Understandably, the first mounting base 21, the second mounting base 22, and the connecting bracket 23 are connected in sequence to establish a stable horizontal constraint between the mast 1 and the inner wall of the wind turbine tower 7, providing lateral support for the mast 1 and ensuring the stability of the mast 1 in the longitudinal distribution within the wind turbine tower 7.

[0135] Meanwhile, by setting the connecting bracket 23 to move along the height direction relative to at least one of the first mounting base 21 and the second mounting base 22, it is ensured that the connecting bracket 23 can adaptively adjust its position relative to at least one of the first mounting base 21 and the second mounting base 22 when the wind turbine tower 7 is tensioned and contracted. This allows the entire support assembly 2 to provide lateral support to the mast 1 while effectively preventing the mast 1 from twisting and deforming due to the tensioning and contraction of the wind turbine tower 7, thus ensuring that the lifting equipment 6 can move up and down normally along the mast 1.

[0136] In practical applications, such as Figure 11As shown, the second mounting base 22 has at least one connecting arm on the side facing the mast 1, and the connecting arm is connected to the mast 1 by a clamp 222; for example, the connecting arm is connected to the main column 111 of the mast 1 by the clamp 222; wherein, the connecting arm is connected to the clamp 222 by bolts or other locking components, and a locking opening is formed between the connecting arm and the clamp 222 for circumferentially enclosing the main column 111.

[0137] In some embodiments, such as Figure 11 As shown, the connecting bracket 23 includes a first frame 231 and a second frame 232; the first end of the first frame 231 is detachably connected to the first mounting base 21; the first end of the second frame 232 is detachably connected to the second end of the first frame 231, and the second end of the second frame 232 is movably disposed on the second mounting base 22 along the height direction.

[0138] It is understandable that by setting the connecting bracket 23 as the first frame 231 and the second frame 232, the first frame 231 and the second frame 232 can be assembled in stages during the installation of the wind turbine tower 7. For example, the first frame 231 can be connected to the inner wall of the wind turbine tower 7 through the first mounting seat 21. When the wind turbine tower 7 is hoisted into place, that is, when the current wind turbine tower 7 is connected to the wind turbine tower 7 below, the first frame 231 can be connected to the second mounting seat 22 on the mast 1 through the second frame 232. This design is beneficial to improving the installation efficiency of the connecting bracket 23 and reducing the installation difficulty.

[0139] In practical applications, such as Figure 11 As shown, the first frame 231 is roughly trapezoidal, and the second frame 232 is roughly rectangular. The length of the first end of the first frame 231 is greater than the length of the second end. The first end of the first frame 231 has two first connection points, the second end of the first frame 231 has two second connection points, the first end of the second frame 232 has two third connection points, and the second end of the second frame 232 has two fourth connection points. Each of the two first connection points can be connected to the two first mounting seats 21 one-to-one via pins or other connecting parts. Each of the two second connection points can be connected to the two third connection points one-to-one via pins or other connecting parts. Both of the two third connection points are movably located on the second mounting seat 22 along the height direction. This design facilitates the sequential assembly of the first mounting seat 21, the first frame 231, and the second frame 232, and also improves the stability of the assembled structure in the connected state.

[0140] In some embodiments, such as Figure 11 As shown, along the radial direction of the wind turbine tower 7, the radial length of the second frame 232 is less than the radial length of the first frame 231.

[0141] Understandably, since the radial length of the second frame 232 is less than the radial length of the first frame 231, the size of the second frame 232 is smaller than the size of the first frame 231. When assembling the first frame 231 and the second frame 232 in stages, the relatively larger first frame 231 can be hoisted together with the wind turbine tower 7, while the relatively smaller second frame 232 can be hoisted separately. This not only makes the division of labor clear and the operation convenient, but also ensures the convenience of hoisting the second frame 232 in a relatively confined space.

[0142] In some embodiments, such as Figure 11 and Figure 12 As shown, the second mounting base 22 is provided with a hinge shaft 221, which extends along the height direction; the second end of the second frame 232 is provided with an adjusting rod 2321, the first end of the adjusting rod 2321 is adjustablely provided on the second frame 232 along the radial direction of the wind turbine tower 7, and the second end of the adjusting rod 2321 is rotatably sleeved on the outside of the hinge shaft 221 and can move along the hinge shaft 221.

[0143] Understandably, by rotatably fitting the second end of the adjusting rod 2321 onto the outside of the hinge shaft 221 and enabling it to move along the hinge shaft 221, it is possible to ensure that the entire connecting bracket 23 has a degree of freedom of rotation relative to the second mounting base 22 about the axis in the height direction, as well as a degree of freedom of movement relative to the second mounting base 22 in the height direction. This design can effectively prevent the mast 1 from twisting and deforming due to the tension and contraction of the wind turbine tower 7.

[0144] In practical applications, such as Figure 12 As shown, the second mounting base 22 has ear plates on the side facing the connecting bracket 23, and the hinge shaft 221 is inserted between the two ear plates along the height direction; the adjusting rod 2321 includes a bushing and a threaded rod. The bushing is sleeved on the peripheral wall of the hinge shaft 221 and can move along the hinge shaft 221; the first end of the threaded rod is connected to the bushing, and the second end of the threaded rod is threadedly connected to the threaded hole of the second frame 232. By rotating the threaded rod, the entire adjusting rod 2321 can be adjusted to move radially relative to the second frame 232 along the wind turbine tower 7, so as to adjust the relative position of the second mounting base 22 and the second frame 232.

[0145] Of course, the second end of the threaded rod can also be inserted into the through hole of the second frame 232, and a fixing nut can be installed on the threaded rod. The fixing nut abuts against the second frame 232 radially to achieve a reliable connection between the threaded rod and the second frame 232. In this way, when the bushing is fitted onto the peripheral wall of the hinge shaft 221, the relative position of the second mounting base 22 and the second frame 232 can be adjusted by adjusting the position of the fixing nut.

[0146] To further ensure the reliability of the connection between the threaded rod and the second frame 232, two fixing nuts can be provided, one fixing nut abutting against the side of the second frame 232 facing the bushing, and the other fixing nut abutting against the side of the second frame 232 away from the bushing.

[0147] In some embodiments, multiple support components 2 are provided, and the multiple support components 2 are arranged sequentially at intervals along the height direction of the mast 1, with a height difference of 10-30m between two adjacent support components 2.

[0148] It is understandable that by setting multiple support components 2 arranged along the height direction, it is convenient to apply horizontal constraints to the mast 1 at multiple positions along the height direction, which helps to shorten the slenderness ratio of the mast 1 and increase the longitudinal stability of the mast 1.

[0149] Since the height difference between two adjacent support components 2 is 10-30m, this arrangement ensures the longitudinal stability of the mast 1 without increasing the overall construction cost of the mast 1 system due to an excessive number of support components 2. It should be particularly noted that, compared to existing designs that require a large number of connectors (such as embedded parts or welded parts) to construct the ladder guide rails, this invention allows the mast 1 to be stably installed vertically within the wind turbine tower 7 at a lower construction cost.

[0150] It should be noted that the height difference between two adjacent support components 2 corresponds to the number of layers of the wind turbine tower 7 assembled. For example, for every 3-4 layers of wind turbine tower 7 assembled, a support component 2 is set between the mast 1 and the next layer of wind turbine tower 7 assembled. The height difference between two adjacent support components 2 can be 10m, 15m, 20m, 30m or other suitable values, and there is no specific limitation on this.

[0151] In some embodiments, such as Figure 7 As shown, the present invention also provides a wind turbine generator set, including a wind turbine generator, a wind turbine tower 7, and a mast-type maintenance platform system as described above; the wind turbine tower 7 is supported at the bottom of the wind turbine generator; the mast-type maintenance platform system is installed inside the wind turbine tower 7.

[0152] It is understandable that the wind turbine tower 7 and the mast 1 are jointly set on the tower foundation 8. The wind turbine tower 7 has multiple layers, and the multiple layers of wind turbine tower 7 are connected sequentially from bottom to top. The wind turbine tower 7 can be a concrete tower or a truss tower, and there is no specific limitation on this. The diameter of the wind turbine tower 7 can be 4-10m.

[0153] Since the wind turbine generator set includes a mast-type maintenance platform system, and the specific structure of the mast-type maintenance platform system is as described in the above embodiments, the wind turbine generator set in this embodiment includes all the technical solutions of the above embodiments. Therefore, it has at least all the beneficial effects achieved by all the technical solutions of the above embodiments, which will not be elaborated further.

[0154] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wind turbine tower maintenance platform, characterized in that, include: The lifting and slewing mechanism includes a lifting frame and a slewing frame. The lifting frame is movably fitted onto the outside of the mast inside the wind turbine tower and is hoisted onto the lower side of a lifting device capable of climbing along the mast. The slewing frame is rotatably fitted onto the outside of the lifting frame around a vertical axis. A foldable platform is located on one side of the rotating frame to carry maintenance personnel and move them to a side closer to the wind turbine tower.

2. The wind turbine tower maintenance platform according to claim 1, characterized in that, A first notch is formed on one side of the lifting frame, and a second notch is formed on one side of the rotating frame, the size of the second notch being adapted to the size of the first notch; During the lifting and slewing mechanism's movement along the mast, the first notch and the second notch are positioned opposite each other, allowing the lifting and slewing mechanism to cross the support assembly located on one side of the mast.

3. The wind turbine tower maintenance platform according to claim 2, characterized in that, When the maintenance platform is in a transfer state, the first notch and the second notch are arranged opposite each other, and the foldable platform is in a folded state on the lower side of the lifting equipment, so that the entire maintenance platform can follow the lifting equipment through the platform channel inside the wind turbine tower.

4. The wind turbine tower maintenance platform according to claim 2, characterized in that, A rotary drive mechanism is provided between the lifting frame and the rotary frame; When the maintenance platform is in operation, the slewing drive mechanism can drive the slewing frame to rotate 360° relative to the lifting frame, and the foldable platform is in the unfolded state. The maintenance personnel can then reach the side near the wind turbine tower by passing through the slewing frame and the foldable platform in sequence.

5. The wind turbine tower maintenance platform according to claim 4, characterized in that, The rotary drive mechanism includes: A C-shaped gear ring is provided on the lifting frame and is rotatably supported on the lower side of the C-shaped bearing ring of the rotating frame; Multiple gear drive components are disposed on the rotary frame, and during the rotation of the rotary frame relative to the lifting frame, at least one of the gear drive components meshes with the "C"-shaped gear ring.

6. The wind turbine tower maintenance platform according to claim 5, characterized in that, The gear drive component includes: A gearbox is mounted on the slewing frame; A handwheel, which is connected to the input end of the gearbox; A transmission gear is connected to the output end of the gearbox and meshes with the "C"-shaped gear ring.

7. The wind turbine tower maintenance platform according to claim 4, characterized in that, A rotation guide structure is further provided between the lifting frame and the rotating frame, the rotation guide structure comprising: A C-shaped guide ring is provided on the lifting frame; Multiple horizontal guide wheels are disposed on the rotary frame and arranged circumferentially on the rotary frame. The multiple horizontal guide wheels are located inside the "C"-shaped guide ring and are in rolling contact with the inner surface of the "C"-shaped guide ring.

8. The wind turbine tower maintenance platform according to any one of claims 1 to 7, characterized in that, The foldable platform includes: The support arm is rotatably mounted on the slewing frame, and the support arm has a first climbing ladder structure along its extension direction, the first climbing ladder structure being used for maintenance personnel to climb. A drive assembly is disposed between the support arm and the slewing frame to drive the support arm to rotate relative to the slewing frame; The work platform is connected to the outrigger and is used to carry the maintenance personnel.

9. The wind turbine tower maintenance platform according to claim 8, characterized in that, The driving component includes: The hoisting mechanism is installed on the rotary frame; Guide wheel assembly, mounted on the slewing frame; A cable is wound around the hoisting mechanism, the cable is wound around the guide wheel assembly, and is connected to the outrigger.

10. The wind turbine tower maintenance platform according to claim 8, characterized in that, The support arm includes: The main boom and the connecting rod are arranged in parallel. The first end of the main boom and the first end of the connecting rod are rotatably connected to the slewing frame, and the second end of the main boom and the second end of the connecting rod are rotatably connected to the working platform. Multiple first step bars are arranged side by side along the extension direction of the main arm to form the first ladder structure; The slewing frame, the main boom, the connecting rod, and the working platform form a parallel four-bar linkage.

11. A mast-type maintenance platform system, characterized in that, include: Masts are used to be installed on the tower foundation and are vertically distributed within the wind turbine tower. A lifting device is movably mounted on the mast along the height direction of the mast; The wind turbine tower maintenance platform as described in any one of claims 1 to 10, wherein the lifting frame is hoisted to the lower side of the lifting equipment.

12. A wind turbine generator set, characterized in that, include: Wind turbine; A wind turbine tower, which is supported at the bottom of the wind turbine generator; The mast-type maintenance platform system as described in claim 11 is disposed inside the wind turbine tower.

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