Fan tower ladder

Abstract

This application relates to the field of wind power generation technology and provides a wind turbine tower ladder. The wind turbine tower ladder includes two spaced-apart longitudinal beams and crossbars spaced downwards between the two longitudinal beams. The crossbars are hollow. Multiple mounting holes are spaced downwards on both longitudinal beams. The crossbars and the two longitudinal beams are detachably fixedly connected by bolts passing through the mounting holes in the crossbars and the two longitudinal beams, and nuts locked onto the bolts. A connecting beam extending along the length of the longitudinal beams is provided between the two longitudinal beams. The connecting beam is located on the back of the multiple crossbars. The wind turbine tower ladder also includes a positioning plate and a connecting assembly. The positioning plate is pressed onto the crossbars from the front and is detachably fixedly connected to the connecting beams through the connecting assembly. This allows for convenient and quick replacement of the crossbars of the wind turbine tower ladder, saving costs, improving maintenance efficiency, strengthening the overall connectivity and stability of the wind turbine tower ladder, and reducing crossbar deformation.

Description

Technical Field

[0001] This application relates to the field of wind power generation technology, and in particular to a wind turbine tower ladder. Background Technology

[0002] The wind turbine tower is the support structure for wind power generation. Wind turbine towers are quite tall, and ladders are typically installed inside for workers to climb. However, after prolonged use, the crossbars of existing wind turbine tower ladders are prone to deformation, affecting worker safety. Therefore, regular inspection and replacement of the ladders are necessary. However, existing wind turbine tower ladders are usually a single, integral structure, making partial replacement impossible. The entire ladder must be replaced, increasing both the cost and workload of the replacement process. Utility Model Content

[0003] To solve the above-mentioned technical problems, or at least partially solve them, this application provides a wind turbine tower ladder that allows for convenient and quick replacement of the ladder's crossbars, saving costs, improving maintenance efficiency, enhancing the overall connectivity and stability of the ladder, and reducing crossbar deformation.

[0004] This application provides a wind turbine tower ladder, including two spaced longitudinal beams and a crossbar spaced from top to bottom between the two longitudinal beams. The crossbar is a hollow structure. Multiple mounting holes are spaced from top to bottom on both longitudinal beams. The crossbar and the two longitudinal beams are detachably fixedly connected by screws passing through the mounting holes of the crossbar and the two longitudinal beams and nuts locked on the screws.

[0005] A connecting beam extending along the length of the longitudinal beams is provided between the two longitudinal beams. The connecting beam is located on the back of the plurality of crossbars. The wind turbine tower ladder also includes a positioning plate and a connecting assembly. The positioning plate is pressed onto the crossbar from the front of the crossbar and is detachably fixed to the connecting beam through the connecting assembly.

[0006] Optionally, the connecting assembly includes a main body, a guide rod, and an elastic limiting member. The guide rod is fixed on the main body, and the connecting beam is provided with a mounting through hole. The guide rod passes through the mounting through hole from the back of the connecting beam, and the elastic limiting member is provided on the guide rod.

[0007] The positioning plate is provided with a positioning hole, and the elastic limiting member is configured to elastically deform along the guide rod in a direction away from the main body under the action of external force so as to pass through the positioning hole. Furthermore, by rotating the connecting assembly, the elastic limiting member can be pressed onto the positioning plate under its own elastic force.

[0008] Optionally, the elastic limiting member includes a limiting block, a compression spring, and a limiting ring;

[0009] The limiting block is sleeved on the guide rod. The end of the limiting block away from the main body is provided with the compression spring, and the end of the compression spring away from the limiting block is provided with the limiting ring. The limiting ring is fixedly connected to the guide rod. The compression spring is used to apply an elastic force to the limiting block so that the limiting block is pressed against the positioning plate.

[0010] Optionally, the limiting block is an elongated limiting block, the positioning hole is an elongated hole adapted to the shape of the limiting block, the surface of the positioning plate facing away from the connecting beam is provided with a countersunk hole that intersects with the positioning hole, the limiting block passes through the positioning hole and is pressed into the countersunk hole after rotation.

[0011] Optionally, the surface of the limiting block facing away from the main body is provided with a lifting portion for applying external force.

[0012] Optionally, the mounting hole extends along the length of the connecting beam, and the connecting assembly is slidably inserted through the mounting hole so that the position of the connecting assembly on the connecting beam is adjustable.

[0013] Optionally, the positioning plate has a Z-shaped structure and two flanges extending in opposite directions. The two flanges are located on the upper and lower sides of the crossbar, respectively, and are detachably fixed to the connecting beam by a connecting assembly.

[0014] Optionally, a fixing rod is connected between the lower parts of the two longitudinal beams. The fixing rod is located below the plurality of crossbars. The two ends of the fixing rod are fixedly connected to the two longitudinal beams as a whole. The bottom of the connecting beam is supported and fixed on the fixing rod.

[0015] Optionally, connecting rod assemblies are installed on the outer sides of both longitudinal beams. Each connecting rod assembly includes two connecting rods. One end of each connecting rod is sleeved on the screw and locked by the nut. The other ends of the two connecting rods are spread outward from each other and used to connect with the lugs on the inner wall of the wind turbine tower.

[0016] Optionally, each of the crossbars and the two longitudinal beams are fixedly connected by a screw and a nut, with the two adjacent screws having opposite insertion directions, and the nuts on the two adjacent screws being located on the opposite side of the two longitudinal beams.

[0017] The technical solution provided in this application has the following advantages compared with the prior art:

[0018] The wind turbine tower ladder provided in this application features a detachable connection between the crossbars and two longitudinal beams via bolts and nuts. This facilitates the maintenance and replacement of the crossbars while also increasing their strength and reducing deformation through the bolts inserted within them. Furthermore, a connecting beam is installed between the two longitudinal beams, located on the back of multiple crossbars, with a positioning plate on the front of each crossbar. This positioning plate is detachably fixed to the connecting beam via a connecting assembly. This further enhances the overall connectivity and stability of the wind turbine tower ladder, further reducing crossbar deformation and extending its service life. It also reduces the frequency of maintenance and replacement, and allows for the replacement of individual crossbars, thereby lowering the cost and workload of ladder replacement. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A three-dimensional structural diagram of the wind turbine tower ladder provided in an embodiment of this application;

[0022] Figure 2 Another structural schematic diagram of the wind turbine tower ladder provided in the embodiment of this application;

[0023] Figure 3 A partial structural schematic diagram of the wind turbine tower ladder provided in an embodiment of this application;

[0024] Figure 4 A partial cross-sectional view of the wind turbine tower ladder provided in an embodiment of this application;

[0025] Figure 5 This is a partially enlarged structural diagram of the positioning plate of the wind turbine tower ladder provided in an embodiment of this application;

[0026] Figure 6 for Figure 5 A schematic diagram of the three-dimensional structure of the positioning plate shown;

[0027] Figure 7 for Figure 5 A three-dimensional structural diagram of the connecting components shown;

[0028] Figure 8This is a partial cross-sectional view of the positioning plate of the wind turbine tower ladder provided in an embodiment of this application.

[0029] Figure 9 This is a schematic diagram of the assembly structure of the wind turbine tower ladder inside the wind turbine tower, as provided in the embodiments of this application.

[0030] The components are as follows: 1. Longitudinal beam; 2. Crossbar; 3. Screw; 4. Nut; 5. Connecting beam; 51. Mounting through hole; 6. Positioning plate; 61. Positioning hole; 62. Countersunk hole; 63. Flanged edge; 7. Connecting assembly; 71. Main body; 72. Guide rod; 73. Limiting block; 74. Compression spring; 75. Limiting ring; 8. Fixing rod; 9. Connecting rod; 10. Wind turbine tower. Detailed Implementation

[0031] To better understand the above-mentioned objectives, features, and advantages of this application, the solution of this application will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0032] Many specific details are set forth in the following description in order to provide a full understanding of this application, but this application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of this application, and not all embodiments.

[0033] Reference Figures 1 to 9 As shown, some embodiments of this application provide a wind turbine tower ladder, including two spaced longitudinal beams 1 and a crossbar 2 spaced from top to bottom between the two longitudinal beams 1. The crossbar 2 has a hollow structure. Multiple mounting holes are spaced from top to bottom on both longitudinal beams 1. The crossbar 2 and the two longitudinal beams 1 are detachably fixedly connected by screws 3 passing through the mounting holes of the crossbar 2 and the two longitudinal beams 1, and nuts 4 locked on the screws 3.

[0034] Specifically, the crossbar 2 has a hollow structure, thus forming a hollow cavity inside for the screw 3 to pass through. The mounting holes on the two longitudinal beams 1 can be aligned one-to-one. When the crossbar 2 is placed between the two longitudinal beams 1, with the hollow cavity of the crossbar 2 aligned with the mounting holes on the two longitudinal beams 1, the screw 3 can pass sequentially through the mounting hole of one longitudinal beam 1, the hollow cavity of the crossbar 2, and the mounting hole of the other longitudinal beam 1 from one side of the screw 3. Then, the nut 4 is screwed onto the protruding end of the screw 3 and tightened, thus fixing the crossbar 2 between the two longitudinal beams 1. When the crossbar 2 needs to be replaced, the nut 4 is unscrewed from the screw 3, and then the screw 3 is pulled out, allowing the crossbar 2 to be disassembled for replacement. This design facilitates the maintenance and replacement of the crossbar 2, and the screw 3 passing through the crossbar 2 increases its strength and reduces deformation. Compared to replacing the entire ladder, this reduces the cost and workload of replacing the ladder.

[0035] In some embodiments, refer to Figures 1 to 4 As shown, a connecting beam 5 extending along the length of the longitudinal beam 1 is provided between the two longitudinal beams 1. The connecting beam 5 is located on the back of multiple crossbars 2. The wind turbine tower ladder also includes a positioning plate 6 and a connecting assembly 7. The positioning plate 6 is pressed onto the crossbar 2 from the front and is detachably fixed to the connecting beam 5 through the connecting assembly 7. By setting the connecting beam 5, the positioning plate 6, and the connecting assembly 7, the overall connectivity and stability of the wind turbine tower ladder can be further enhanced, while the deformation of the crossbars 2 can be further reduced.

[0036] Specifically, when workers climb the horizontal bar 2, the middle section of the horizontal bar 2 is more prone to deformation along its length. By setting a connecting beam 5 between the two longitudinal beams 1, the connecting beam 5 can be located at the middle section of the horizontal bar 2 along its length. This allows the connecting beam 5 to better enhance the structural strength of the middle section of the horizontal bar 2 along its length, thereby reducing deformation. Furthermore, when workers climb the horizontal bar 2, their two feet can step on the areas on either side of the connecting beam 5, meaning the installation of the connecting beam 5 does not hinder normal climbing.

[0037] In some embodiments, refer to Figure 5 , Figure 6 and Figure 8 As shown, the positioning plate 6 has a Z-shaped structure, or a π-shaped structure. The positioning plate 6 has two flanges 63 extending in opposite directions. The two flanges 63 are located on the upper and lower sides of the crossbar 2, respectively, and are detachably fixed to the connecting beam 5 by a connecting assembly 7. With this configuration, after the positioning plate 6 is connected to the connecting beam 5, it can surround the circumferential periphery of the crossbar 2, thereby strengthening the structural strength of the crossbar 2 and reducing the deformation of the crossbar 2.

[0038] In some embodiments, refer to Figures 5 to 8 As shown, the connecting assembly 7 includes a main body 71, a guide rod 72, and an elastic limiting member. The guide rod 72 is fixed on the main body 71. The connecting beam 5 is provided with an installation through hole 51. The guide rod 72 passes through the installation through hole 51 from the back of the connecting beam 5. The elastic limiting member is provided on the guide rod 72.

[0039] Specifically, refer to Figure 7 As shown, the main body 71 can be a block structure. One end of the guide rod 72 is fixedly connected to the main body 71, and the other end of the guide rod 72 extends out of the main body 71. An elastic limiting member is provided on the rod segment of the guide rod 72 that extends out of the main body 71. Furthermore, the elastic limiting member is provided on the rod segment of the guide rod 72 that passes through the mounting hole 51. That is, after the guide rod 72 passes through the mounting hole 51, the elastic limiting member on it also passes through the mounting hole 51.

[0040] Reference Figure 6 and Figure 8 As shown, the positioning plate 6 is provided with a positioning hole 61. The elastic limiting member is configured to elastically deform along the guide rod 72 in a direction away from the main body 71 under the action of external force, so as to pass through the positioning hole 61. And by rotating the connecting assembly 7, the elastic limiting member can be pressed onto the positioning plate 6 under its own elastic force. That is, by applying a pulling force to the elastic limiting member along the guide rod 72 in a direction away from the main body 71, the elastic limiting member can pass through the positioning hole 61 on the positioning plate 6. Then, by rotating the connecting assembly 7 and releasing it, the elastic limiting member can be misaligned with the positioning hole 61 on the positioning plate 6 and pressed onto the positioning plate 6 under its own elastic force.

[0041] It should be understood that, in order to enable the elastic limiting member to press against the positioning plate 6 under its own elastic force after the rotating connecting assembly 7 is used, the positioning hole 61 can be set as a non-circular hole shape such as an elongated hole. Correspondingly, the elastic limiting member can be adapted to the shape of the positioning hole 61. In this way, when the elastic limiting member is adjusted to be aligned with the positioning hole 61, it can pass smoothly through the positioning hole 61. After the elastic limiting member passes through the positioning hole 61, by rotating the connecting assembly 7, the elastic limiting member and the positioning hole 61 can no longer be aligned, thereby restricting the elastic limiting member from being pulled out of the positioning hole 61 in the opposite direction, thereby achieving the purpose of connecting the positioning plate 6 and the connecting beam 5 using the connecting assembly 7.

[0042] Continue to refer to Figures 5 to 8As shown, the elastic limiting component includes a limiting block 73, a compression spring 74, and a limiting ring 75. The limiting block 73 is sleeved on the guide rod 72. The end of the limiting block 73 away from the main body 71 is provided with a compression spring 74, and the end of the compression spring 74 away from the limiting block 73 is provided with a limiting ring 75. The limiting ring 75 is fixedly connected to the guide rod 72. The compression spring 74 is used to apply an elastic force to the limiting block 73 so that the limiting block 73 is pressed onto the positioning plate 6. Specifically, the guide rod 72 may be provided with an external thread, and the limiting ring 75 may be provided with an internal thread. The limiting ring 75 is sleeved on the guide rod 72 and is threadedly connected and fixed to the guide rod 72.

[0043] Continue to refer to Figures 5 to 8 As shown, the limiting block 73 is a long strip-shaped limiting block, and the positioning hole 61 is a long strip hole (or a straight hole) that matches the shape of the limiting block 73. The surface of the positioning plate 6 facing away from the connecting beam 5 is provided with a countersunk hole 62 that intersects with the positioning hole 61. The limiting block 73 passes through the positioning hole 61 and is pressed into the countersunk hole 62 after rotation.

[0044] Specifically, the countersunk hole 62 can be an elongated countersunk hole (or a straight countersunk hole), and the length direction of the countersunk hole 62 can be perpendicular to the length direction of the positioning hole 61. After the limiting block 73 passes through the positioning hole 61, by rotating the connecting component 7 (specifically, rotating it 90 degrees), the limiting block 73 can fall into the countersunk hole 62, thereby using the countersunk hole 62 to circumferentially limit the limiting block 73, so that the limiting block 73 cannot rotate without the action of external tension, thus achieving a good anti-loosening effect.

[0045] To facilitate the application of external force to the limiting block 73 by the operator, a lifting part for applying external force is provided on the surface of the limiting block 73 facing away from the main body 71. Specifically, the lifting part can be a protrusion or other structure provided on the surface of the limiting block 73, and the operator can pull the lifting part to apply external force to the limiting block 73 along the guide rod 72 in a direction away from the main body 71.

[0046] In some embodiments, refer to Figures 3 to 5 As shown, the mounting through hole 51 on the connecting beam 5 extends along the length direction of the connecting beam 5, so that the mounting through hole 51 is formed as a groove structure extending along the length direction of the connecting beam 5; the connecting component 7 is slidably inserted in the mounting through hole 51, so that the position of the connecting component 7 on the connecting beam 5 is adjustable.

[0047] This configuration allows for adjustment of the position of the connecting component 7 on the connecting beam 5 as needed, ensuring alignment between the connecting component 7 on the connecting beam 5 and the positioning hole 61 on the crossbar 2. This facilitates smooth assembly of the connecting component 7 and the crossbar 2, improving assembly efficiency. Furthermore, compared to creating independent mounting holes 51 on the connecting beam 5 corresponding to each crossbar 2, the precision requirements for the machining position of the mounting holes 51 are reduced, resulting in smoother machining and assembly.

[0048] Of course, in practice, it is also feasible to open independent mounting holes 51 on the connecting beam 5 at the locations corresponding to each crossbar 2.

[0049] Specifically, when installing the positioning plate 6, first press the positioning plate 6 at the middle position along the length direction of the crossbar 2, and adjust the length direction of the limiting block 73 of the connecting component 7 to be consistent with the length direction of the positioning hole 61 on the positioning plate 6, so that the guide rod 72, limiting block 73, compression spring 74 and limiting ring 75 of the connecting component 7 can all pass through the positioning hole 61 of the positioning plate 6; then apply a lifting force to the limiting block 73, so that the limiting block 73 exceeds the surface of the positioning plate 6 where the positioning hole 61 is opened, and then rotate 90 degrees and release it, so that the limiting block 73 falls into the countersunk hole 62 of the positioning plate 6 and is pressed by the compression spring 74, thus realizing the connection between the connecting component 7 and the positioning plate 6.

[0050] When it is necessary to replace the crossbar 2, the positioning plate 6 at the crossbar 2 to be replaced must be removed first. Specifically, when disassembling the positioning plate 6, first apply a lifting force to the limiting block 73 so that the limiting block 73 extends beyond the surface of the positioning hole 61 on the positioning plate 6, then rotate it 90 degrees in the opposite direction and release it, so that the length direction of the limiting block 73 is consistent with the length direction of the positioning hole 61. Under the elastic force of the compression spring 74, the limiting block 73 will disengage from the positioning hole 61 in the opposite direction, thus enabling the positioning plate 6 to be removed from the connecting beam 5.

[0051] Of course, in specific implementations, the connecting component 7 is not limited to the above structure. The connecting component 7 can also use screws, bolts and nuts, etc., which can also achieve a detachable fixed connection between the positioning plate 6 and the connecting beam 5.

[0052] In some embodiments, refer to Figures 1 to 3 As shown, a fixing rod 8 is connected between the lower parts of the two longitudinal beams 1. The fixing rod 8 is located below multiple crossbars 2. The two ends of the fixing rod 8 are fixedly connected to the two longitudinal beams 1 as a whole. The bottom of the connecting beam 5 is supported and fixed on the fixing rod 8.

[0053] Specifically, the two ends of the fixing rod 8 can be fixedly connected to the two longitudinal beams 1 by welding or other means. A support platform extending backward is formed in the middle of the fixing rod 8 along its length. The bottom of the connecting beam 5 can be fixed to the support platform of the fixing rod 8 by welding or other means. This configuration ensures the overall connection firmness and stability of the wind turbine tower ladder, and improves the safety of using the wind turbine tower ladder.

[0054] In some embodiments, refer to Figure 1 , Figure 2 and Figure 9As shown, connecting rod assemblies are installed on the outer sides of both longitudinal beams 1. Each connecting rod assembly includes two connecting rods 9. One end of each connecting rod 9 is sleeved on a screw rod 3 and locked with a nut 4. The other ends of the two connecting rods 9 are spread outwards and used to connect with the ear plate on the inner wall of the wind turbine tower 10. With this arrangement, the connecting rods 9 can be connected simultaneously when installing the crossbar 2 of the wind turbine tower ladder, improving assembly efficiency and ensuring that the wind turbine tower ladder is securely fixed to the wind turbine tower 10.

[0055] In some embodiments, refer to Figure 1 and Figure 2 As shown, each crossbar 2 and each of the two longitudinal beams 1 is fixedly connected by a screw 3 and a nut 4. The screws 3 are inserted in opposite directions, and the nuts 4 on the adjacent screws 3 are located on the opposite sides of the two longitudinal beams 1. This arrangement ensures that the nuts 4 on the adjacent screws 3 loosen in opposite directions, thereby improving the tightening effect of the multiple nuts 4 and thus enhancing the firmness of the connection between the multiple crossbars 2 and the two longitudinal beams 1.

[0056] Reference Figure 1 and Figure 2 As shown, there are multiple connecting rod groups, which are alternately arranged on the outer sides of the two longitudinal beams 1 in a top-to-bottom direction. Specifically, multiple connecting rod groups are provided on the outer side of each longitudinal beam 1, and these connecting rod groups are spaced apart along the length of the wind turbine tower ladder. The connecting rod groups located on the outer side of one longitudinal beam 1 are staggered from those located on the outer side of the other longitudinal beam 1 along the length of the wind turbine tower ladder.

[0057] This configuration allows for the installation of multiple connecting rod assemblies on the two longitudinal beams 1, preventing structural interference after installation, and ensuring a stable and reliable connection between the wind turbine tower ladder and the inner wall of the wind turbine tower 10 via the multiple connecting rod assemblies. Of course, the multiple connecting rod assemblies can also be arranged reasonably according to the actual installation location requirements, as long as the connection is stable and reliable.

[0058] The wind turbine tower ladder provided in this application requires replacement when one of the crossbars 2 bends and deforms during use. First, remove the positioning plate 6 at the crossbar 2 to be replaced, then remove the nut 4 and screw 3 at the crossbar 2 to be replaced, then place the new crossbar 2 in the replacement position, and retighten the screw 3 and nut 4, and then install the positioning plate 6.

[0059] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0060] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wind turbine tower ladder, characterized in that, It includes two spaced longitudinal beams (1) and a crossbar (2) spaced from top to bottom between the two longitudinal beams (1). The crossbar (2) is a hollow structure. Multiple mounting holes are spaced from top to bottom on both longitudinal beams (1). The crossbar (2) and the two longitudinal beams (1) are detachably fixedly connected by a screw (3) passing through the mounting holes of the crossbar (2) and the two longitudinal beams (1) and a nut (4) locked on the screw (3). A connecting beam (5) extending along the length of the longitudinal beam (1) is provided between the two longitudinal beams (1). The connecting beam (5) is located on the back of the plurality of crossbars (2). The wind turbine tower ladder also includes a positioning plate (6) and a connecting assembly (7). The positioning plate (6) is pressed onto the crossbar (2) from the front and is detachably fixed to the connecting beam (5) through the connecting assembly (7).

2. The wind turbine tower ladder according to claim 1, characterized in that, The connecting assembly (7) includes a main body (71), a guide rod (72) and an elastic limiting member. The guide rod (72) is fixed on the main body (71). The connecting beam (5) is provided with an installation through hole (51). The guide rod (72) passes through the installation through hole (51) from the back of the connecting beam (5). The elastic limiting member is provided on the guide rod (72). The positioning plate (6) is provided with a positioning hole (61). The elastic limiting member is configured to elastically deform along the guide rod (72) away from the main body (71) under the action of external force so as to pass through the positioning hole (61). The elastic limiting member can be pressed onto the positioning plate (6) under its own elastic force by rotating the connecting assembly (7).

3. The wind turbine tower ladder according to claim 2, characterized in that, The elastic limiting component includes a limiting block (73), a compression spring (74), and a limiting ring (75); The limiting block (73) is sleeved on the guide rod (72). The end of the limiting block (73) away from the main body (71) is provided with the compression spring (74). The end of the compression spring (74) away from the limiting block (73) is provided with the limiting ring (75). The limiting ring (75) is fixedly connected to the guide rod (72). The compression spring (74) is used to apply elastic force to the limiting block (73) so that the limiting block (73) is pressed on the positioning plate (6).

4. The wind turbine tower ladder according to claim 3, characterized in that, The limiting block (73) is a long strip-shaped limiting block, and the positioning hole (61) is a long strip hole that matches the shape of the limiting block (73). The surface of the positioning plate (6) facing away from the connecting beam (5) is provided with a countersunk hole (62) that intersects with the positioning hole (61). The limiting block (73) passes through the positioning hole (61) and is pressed into the countersunk hole (62) after rotation.

5. The wind turbine tower ladder according to claim 3, characterized in that, The limiting block (73) has a lifting part on the surface facing away from the main body (71) for applying external force.

6. The wind turbine tower ladder according to claim 2, characterized in that, The mounting hole (51) extends along the length of the connecting beam (5), and the connecting component (7) is slidably inserted in the mounting hole (51) so that the position of the connecting component (7) on the connecting beam (5) is adjustable.

7. The wind turbine tower ladder according to claim 1, characterized in that, The positioning plate (6) has a Z-shaped structure and has two flanges (63) extending in opposite directions. The two flanges (63) are located on the upper and lower sides of the crossbar (2) respectively and are detachably fixed to the connecting beam (5) through a connecting assembly (7).

8. The wind turbine tower ladder according to any one of claims 1 to 7, characterized in that, A fixing rod (8) is connected between the lower parts of the two longitudinal beams (1). The fixing rod (8) is located below the plurality of cross bars (2). The two ends of the fixing rod (8) are fixedly connected to the two longitudinal beams (1) as a whole. The bottom of the connecting beam (5) is supported and fixed on the fixing rod (8).

9. The wind turbine tower ladder according to any one of claims 1 to 7, characterized in that, Connecting rod assemblies are installed on the outer sides of both longitudinal beams (1). Each connecting rod assembly includes two connecting rods (9). One end of each connecting rod (9) is sleeved on the screw (3) and locked by the nut (4). The other ends of the two connecting rods (9) are spread out in a direction away from each other and are used to connect with the ear plate on the inner wall of the wind turbine tower (10).

10. The wind turbine tower ladder according to any one of claims 1 to 7, characterized in that, Each of the crossbars (2) and the two longitudinal beams (1) are fixedly connected by a screw (3) and a nut (4). The two adjacent screws (3) are inserted in opposite directions, and the nuts (4) on the two adjacent screws (3) are respectively located on the side of the two longitudinal beams (1) away from each other.

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