Hoisting system

Abstract

The utility model provides a hoisting system which is used for hoisting a pipeline of a wind generating set, the hoisting system comprises a hoisting tool and a winding and unwinding frame, the hoisting tool is used for hoisting the pipeline and comprises a hoisting lug assembly, a hoisting tool body and a hoisting rope, the hoisting tool body is used for being arranged above a tower top platform of the wind generating set, and the hoisting lug assembly is arranged on the hoisting tool body; the lifting lug assembly comprises a lifting lug body and an external sleeve, one end of the lifting lug body is connected to the lifting appliance body through the lifting rope, the other end of the lifting lug body is used for being inserted into the end of the pipeline, and the external sleeve is used for being arranged outside the end of the pipeline in a sleeving mode. The end of the pipeline can be clamped between the other end of the pipeline and the external sleeve; the winding and unwinding frame is used for being arranged at the tower bottom and supporting the pipeline. According to the lifting lug assembly, the lifting lug body is matched with the external sleeve, so that the end of the pipeline can be reliably connected to the lifting lug assembly, and possibility is provided for lifting of the pipeline.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of wind power generation, and particularly relates to a hoisting system for hoisting pipelines of a wind turbine generator set. Background Art

[0002] In the field of wind power generation, sometimes some pipelines need to be hoisted to the top of the tower. For example, at present, the cooling pipelines of large megawatt offshore wind turbine generator sets sometimes need to be hoisted to the top of the tower. However, there is currently no good hoisting device. Summary of the Utility Model

[0003] The main purpose of the present disclosure is to provide a hoisting system to solve the problem of hoisting pipelines of a wind turbine generator set.

[0004] For the above purpose, the present disclosure provides the following technical solutions:

[0005] In one aspect of the present disclosure, there is provided a hoisting system for hoisting pipelines of a wind turbine generator set. The hoisting system includes a spreader and a reel stand. The spreader is used for hoisting the pipeline. The spreader includes a spreader ear assembly, a spreader body, and a lifting rope. The spreader body is used to be arranged above the top platform of the wind turbine generator set. The spreader ear assembly includes a spreader ear body and an external sleeve. One end of the spreader ear body is connected to the spreader body through the lifting rope, and the other end is used to be inserted into the end of the pipeline. The external sleeve is used to be sleeved outside the end of the pipeline so that the end of the pipeline can be clamped between the other end and the external sleeve. The reel stand is used to be arranged at the tower bottom and support the pipeline.

[0006] In an exemplary embodiment of the present disclosure, the spreader ear body includes an ear plate and a core pipe joint. The ear plate is connected to the lifting rope. The outer wall of the core pipe joint is smooth and can be inserted into the end of the pipeline. The ear plate and the core pipe joint are connected together through a flange.

[0007] Optionally, the reel stand includes a base, a rotating frame, and a rotation drive. The rotating frame is rotatably connected above the base, and the rotation drive is used to drive the rotating frame to rotate.

[0008] Specifically, the rotating frame includes an annular rotating frame, an axial rotating frame, and a plurality of guide rail brackets connected between the axial rotating frame and the annular rotating frame. The annular rotating frame is rotatably connected to the base around the central axis. The plurality of guide rail brackets are arranged at intervals along the circumferential direction of the annular rotating frame, and each guide rail bracket extends from the central axis to the annular rotating frame. The axial rotating frame extends upward from the guide rail bracket and is movably connected to the guide rail bracket.

[0009] Further, the winding and unwinding rack further includes a support frame, the support frame includes a middle support and a plurality of edge supports located on the same circumference, the center of the circumference is located on the axis of the middle support, the radially inner end of the guide rail bracket is connected to the middle support, and the radially outer end is fixed to the annular rotating frame.

[0010] In another exemplary embodiment of the present disclosure, the annular rotating frame is a circular ring structure, the center of the annular rotating frame is located on the axis of the middle support, the edge support includes a roller bracket and a roller, the bottom end of the roller bracket is fixed to the base, and the roller is rotatably connected to the top end of the roller bracket, and the rotation axis of the roller is arranged parallel to the radius of the annular rotating frame, so that the annular rotating frame is rotatably supported on the roller.

[0011] Optionally, the rotating frame further includes a slider, the slider is fixed to the bottom of the axial rotating frame, and the slider is movably connected to the guide rail bracket along the extending direction of the guide rail bracket, and at least one of the slider and the guide rail bracket is provided with a guide groove.

[0012] Specifically, the base is a regular polygon frame and a plurality of connecting ribs, the outer ends of the plurality of connecting ribs are respectively connected to the corners of the regular polygon frame, and the inner ends converge and are connected to the center of the regular polygon frame, and the edge support is connected to the corners of the regular polygon frame.

[0013] In another exemplary embodiment of the present disclosure, the extending direction of the guide rail bracket is arranged parallel to the radius of the annular rotating frame.

[0014] Optionally, the hoisting system further includes at least two pipeline guiding members, and the at least two pipeline guiding members are longitudinally spaced along the tower of the wind turbine and arranged on the side wall of the tower.

[0015] Further, the pipeline guiding member includes a guide wheel and a guide wheel bracket, one end of the guide wheel bracket is fixed to the side wall of the tower, and the guide wheel is rotatably connected to the other end of the guide wheel bracket.

[0016] The hoisting system provided by the present disclosure has at least the following beneficial effects: The hoisting system provided by the present disclosure includes a lifting tool, and the lifting tool includes a lifting lug assembly, and the lifting lug assembly is connected to the lifting tool body through a lifting rope, so that the pipeline end can be reliably connected to the lifting lug assembly, providing the possibility for the hoisting of the pipeline. Description of the Drawings

[0017] Through the description of the embodiments in conjunction with the drawings below, the above and / or other objects and advantages of the present disclosure will become clearer, where:

[0018] Figure 1Schematic structural diagram of a hoisting system arranged on a wind turbine generator provided by an exemplary embodiment of the present disclosure.

[0019] Figure 2 For Figure 1 Partial structure diagram of the lifting tool in

[0020] Figure 3 For Figure 1 Structure diagram of the lifting lug assembly of the lifting tool in

[0021] Figure 4 For Figure 1 Structure diagram of the winding and unwinding rack in

[0022] Figure 5 For Figure 4 Structure diagram of the combined state of the slider and the axial rotating frame in

[0023] Figure 6 For Figure 4 Structure diagram of the edge support in

[0024] Figure 7 For Figure 1 Structure diagram of the pipeline guide in

[0025] Explanation of reference numerals:

[0026] 1, tower; 2, pipeline;

[0027] 10, lifting tool; 11, lifting lug assembly;

[0028] 12, lifting tool body; 13, lifting rope;

[0029] 14, lifting tool bracket; 20, pipeline guide;

[0030] 30, winding and unwinding rack; 111, lifting lug body;

[0031] 112, external sleeve; 201, guide wheel;

[0032] 202, guide wheel bracket; 310, base;

[0033] 311, regular polygon frame; 312, connecting rib;

[0034] 320, rotating frame; 321, annular rotating frame;

[0035] 322, guide rail bracket; 323, axial rotating frame;

[0036] 324, slider; 325, cylinder flange;

[0037] 326, guide groove; 327, plugging block;

[0038] 330. Support frame; 340. Rotation drive;

[0039] 331. Middle support; 332. Edge support;

[0040] 1111. Ear plate; 1112. Ear plate flange;

[0041] 1113. Core pipe joint; 1114. Joint flange;

[0042] 3321. Roller support; 3322. Roller. Detailed implementation mode

[0043] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the embodiments of the present disclosure should not be construed as being limited to the embodiments set forth herein. Identical reference numerals in the figures denote identical or similar structures, and thus their detailed descriptions will be omitted.

[0044] In current wind turbines, coolant can be used to cool the components at the top of the tower. Therefore, a cooling pipeline needs to be arranged at the top of the tower. For example, but not limited to, one end of the cooling pipeline is arranged at the bottom of the tower and communicated with the pump body, and the other end of the cooling pipeline extends upward along the tower wall to the top of the tower. When the pump body is started, the cooling medium located at the bottom of the tower can be transported to the top of the tower, thereby taking away the heat at the top of the tower.

[0045] During the assembly process of the wind turbine, the cooling pipeline is usually installed by hoisting a whole bundle to the top of the tower and then gradually lowering one end of the cooling pipeline. However, the whole bundle of cooling pipelines needs to occupy a large amount of space at the top of the tower. Those skilled in the art urgently need a hoisting system suitable for pipeline hoisting and that does not occupy too much space at the top of the tower.

[0046] In one aspect of the present disclosure, a hoisting system is provided for hoisting pipelines of a wind turbine. The hoisting system includes a spreader 10 and a reel stand 30. The spreader 10 is used for hoisting the pipeline 2, and the reel stand 30 is used for being arranged at the bottom of the tower and supporting the pipeline 2.

[0047] The hoisting system provided by the present disclosure is used to hoist the pipeline 2 of the wind turbine to meet the design requirements for the pipeline 2 of the wind turbine to be arranged at the top of the tower and assist in hoisting the pipeline 2 to the top of the tower. In the present disclosure, the reel stand 30 is arranged at the bottom of the tower and does not need to occupy too much space at the top of the tower.

[0048] The pipeline provided by the present disclosure can be a cooling pipeline, but is not limited thereto. The hoisting system provided by the present disclosure is particularly suitable for flexible composite high-pressure transmission pipes, but is not limited thereto.

[0049] Refer to Figure 1, a pipeline 2 is wound around the outer periphery of a reel 30, and a spreader body 12 of a spreader 10 is fixed above the top platform of a tower 1 so as to facilitate lifting the end of the pipeline 2 above the top platform.

[0050] Referring to Figure 1 and Figure 2 , the spreader 10 includes a lifting lug assembly 11 (not shown in the figure), a spreader body 12 and a lifting rope 13. The spreader body 12 is used to be arranged above the top platform of a wind turbine generator. For example but not limited to, the spreader 10 further includes a spreader bracket 14 which is connected to the side wall of the tower through fasteners, and the spreader body 12 is connected to the spreader bracket 14, so that the spreader body 12 can be reliably connected to the side wall of the tower through the spreader bracket 14, but not limited thereto. According to needs, the spreader body 12 can be an electric hoist, but not limited thereto.

[0051] Actually, the lifting lug assembly 11 is connected to the end of the lifting rope 13, not shown in the figure. According to actual needs, the lifting rope 13 can be a steel wire rope, a chain, etc., but not limited thereto.

[0052] Referring to Figure 3 , the lifting lug assembly 11 includes a lifting lug body 111 and an external sleeve 112. One end of the lifting lug body 111 is connected to the spreader body 12 through the lifting rope 13, and the other end is used to be inserted into the end of the pipeline 2. The external sleeve 112 is used to be sleeved outside the end of the pipeline 2, so that the end of the pipeline 2 can be clamped between the other end and the external sleeve 112. The lifting lug assembly 11 provided by the present disclosure, through the cooperation of the lifting lug body 111 and the external sleeve 112, reliably connects the end of the pipeline 2 to the lifting lug assembly, providing the possibility for the hoisting of the pipeline 2.

[0053] Specifically, the hoisting system provided by the present disclosure includes a spreader 10, the spreader 10 includes a lifting lug assembly 11, the lifting lug assembly 11 includes a lifting lug body 111 whose one end can be inserted into the end of the pipeline and an external sleeve 112 sleeved outside the end of the pipeline 2, so that the end of the pipeline 2 can be firmly connected to the lifting lug assembly 11, effectively avoiding accidental detachment of the end of the pipeline 2 from the lifting lug assembly 11 during the upward movement, thereby improving the use reliability of the hoisting system.

[0054] The present disclosure clamps the end of the pipeline 2 on the inner and outer sides of the end of the pipeline 2 through the lifting lug body 111 and the external sleeve 112, thereby realizing connection with the end of the pipeline 2.

[0055] One end of the lifting lug body 111 is connected to the lifting tool body 12 through a lifting rope 13. During the operation of the lifting tool body 12, the lifting rope 13 can be retracted or lowered as needed. During the lowering process of the lifting rope 13, the lifting lug assembly 11 will be lowered. For example, but not limited to, before the pipeline hoisting starts, the lifting lug assembly 11 can be lowered to the bottom of the tower first to connect the end of the pipeline 2 to the lifting lug assembly 11, but not limited to this. During the upward retraction process of the lifting rope 13, the lifting lug assembly 11 will be lifted upward. At the same time, the end of the pipeline 2 connected to the lifting lug assembly 11 will be lifted together. At the same time, the reel 30 rotates to enable the pipeline 2 to smoothly disengage from the reel 30.

[0056] To improve the versatility of the hoisting system to adapt to pipelines 2 with different apertures, the provided lifting lug body 111 can be set to multiple ones, and the outer diameters of one end of each lifting lug body 111 can be different. The external sleeve 112 and the lifting lug body 111 can be paired and adapted.

[0057] Continue to refer to Figure 3 , the lifting lug body 111 includes an ear plate 1111 and a core pipe joint 1113. The ear plate 1111 is connected to the lifting rope 13. The outer wall of the core pipe joint 1113 is smooth and can be inserted into the end of the pipeline 2. The ear plate 1111 and the core pipe joint 1113 are connected together by a flange.

[0058] Specifically, one end of the ear plate 1111 is provided with a lifting hole to be able to connect with the lifting rope 13. The other end of the ear plate 1111 is provided with an ear plate flange 1112. The core pipe joint 1113 is provided with a joint flange 1114 matching the ear plate flange 1112. By connecting the ear plate flange 1112 and the joint flange 1114 together, the ear plate 1111 and the core pipe joint 1113 are connected together. With such a setting, the core pipe joint 1113 can be set to multiple ones, and the outer diameter dimensions of each core pipe joint 1113 are different to be able to adapt to different inner diameters of the pipelines 2. The appropriate core pipe joint 1113 can be selected to be connected to the ear plate 1111 as needed.

[0059] During the operation of the lifting tool 10, to avoid excessive pulling of the pipeline 2 and affecting its service life, the reel 30 can be set to rotate along with the rising of the pipeline 2. Specifically, refer to Figure 4 , the reel 30 includes a base 310, a rotating frame 320, and a rotation drive 340. The rotating frame 320 is rotatably connected above the base 310, and the rotation drive 340 is used to drive the rotating frame 320 to rotate.

[0060] In this embodiment, the rotating frame 320 rotates under the driving action of the rotation drive 340. The rotation speed of the rotating frame 320 can be adjusted according to the rising speed of the pipeline 2, but not limited to this.

[0061] Continue to refer to Figure 4 Figure 4 , the turntable 320 includes an annular turntable 321, an axial turntable 323, and a plurality of guide rail brackets 322 connected between the plurality of axial turntables 323 and the annular turntable 321. The annular turntable 321 is rotatably connected to the base 310 about the central axis. The plurality of guide rail brackets 322 are arranged at intervals along the circumferential direction of the annular turntable 321, and each guide rail bracket 322 extends from the central axis towards the annular turntable 321. Each axial turntable 323 extends upward from the corresponding guide rail bracket 322 and is movably connected to the guide rail bracket 322.

[0062] The axial turntable 323 extends substantially along the height direction of the guide rail bracket 322. The plurality of axial turntables 323 are arranged at intervals along the circumferential direction of the annular turntable 321. The pipeline is used to wind around the outside of the plurality of axial turntables 323. That is to say, the axial turntable 323 is mainly used to provide a winding space for the pipeline 2.

[0063] The annular turntable 321 is used to support the entire turntable 320, and the guide rail brackets 322 and the axial turntables 323 are both connected to the annular turntable 321. Specifically, the annular turntable 321 is generally circular ring-shaped. The guide rail brackets 322 extend radially from the center of the annular turntable 321 and are fixed to the annular turntable 321, so that the annular turntable 321 and the guide rail brackets 322 form a structure similar to a bicycle wheel rim. This structure is stable and not easily deformed. In an alternative embodiment, the extending direction of the guide rail bracket 322 is arranged parallel to the radius of the annular turntable 321.

[0064] Continue to refer to Figure 4 Figure 4 , the bottom end of the axial turntable 323 is movably connected to the guide rail bracket 322. The plurality of axial turntables 323 can move towards the center of the annular turntable 321 or away from the center of the annular turntable 321, so that the plurality of axial turntables 323 can be located on circumferences of different diameters, so as to be able to set the position of the axial turntable 323 according to the needs of the pipeline 2, improving the versatility of the turntable 320.

[0065] Refer to Figure 4 and Figure 5 Figure 5 , specifically, the turntable 320 further includes a slider 324. The slider 324 is fixed to the bottom of the axial turntable 323, and the slider 324 is movably connected to the guide rail bracket 322 along the extending direction of the guide rail bracket 322. At least one of the slider 324 and the guide rail bracket 322 is provided with a guide groove 326. With such a setting, the slider 324 can slide relative to the guide rail bracket 322, facilitating the position adjustment of the axial turntable 323.

[0066] This embodiment is described by taking the guide groove 326 provided on the slider 324 as an example, but not limited thereto. The guide groove 326 can also be provided on the guide rail bracket 322, or the guide groove 326 can be provided on the slider 324 and the guide rail bracket 322 respectively, but not limited thereto.

[0067] To improve the use safety of the guide rail bracket 322, a blocking block 327 is provided at the radially outer end of each guide rail bracket 322 to prevent the axial rotating frame 323 from accidentally falling off from the outer end of the guide rail bracket 322.

[0068] Continue to refer to Figure 4 , to reliably support the annular rotating frame 321 on the base 310 and prevent the winding and unwinding frame 30 from shaking or tipping over, the winding and unwinding frame 30 further includes a support frame 330. The support frame 330 includes a middle support 331 and a plurality of edge supports 332 located on the same circumference. The center of the circumference is located on the axis of the middle support 331. The edge supports 332 are located below the annular rotating frame 321. The radially inner end of the guide rail bracket 322 is connected to the middle support 331, and the radially outer end is fixed to the annular rotating frame 321.

[0069] As an example, the middle support 331 can be in the form of a cylinder, and cylinder flanges 325 are respectively provided at the upper and lower ends of the cylinder to facilitate the connection of the radially inner end of the guide rail bracket 322. For example, but not limited to, the radially inner end of the guide rail bracket 322 can be connected to the cylinder flange 325 through fasteners or welding processes, and the radially outer end of the guide rail bracket 322 can be connected to the annular rotating frame 321 through fasteners or welding processes, so that the middle support 331, the guide rail bracket 322, and the annular rotating frame 321 are connected as a whole, improving the connection stability of the winding and unwinding frame 30.

[0070] Further, referring to Figure 4 and Figure 6 , the edge support 332 includes a roller bracket 3321 and a roller 3322. The bottom end of the roller bracket 3321 is fixed to the base 310, and the roller 3322 is rotatably connected to the top end of the roller bracket 3321. The rotation axis of the roller 3322 is arranged parallel to the radius of the annular rotating frame 321, so that the annular rotating frame 321 is rotatably supported on the roller 3322.

[0071] In the present disclosure, by providing the roller 3322 at the top of the roller bracket 3321, during the rotation of the annular rotating frame 321 around the central axis, the annular rotating frame 321 and the roller 3322 are in rolling friction, avoiding excessive wear of the annular rotating frame 321, thereby improving the service life of the annular rotating frame 321.

[0072] Continue to refer to Figure 6, in this embodiment, the roller bracket 3321 is composed of a bottom plate and a pair of triangular brackets. The pair of triangular brackets are arranged at intervals along the radial direction of the annular rotating frame 321, and the bottom ends of the triangular brackets are fixed on the bottom plate. The roller 3322 is rotatably connected to the top ends of the triangular brackets, so that the roller 3322 is reliably connected to the base 310 through the roller bracket 3321.

[0073] Return Figure 4 , the base 310 includes a regular polygon frame 311 and a plurality of connecting ribs 312. The outer ends of the plurality of connecting ribs 312 are respectively connected to the corners of the regular polygon frame 311, and the inner ends converge and are connected to the center of the regular polygon frame 311. The edge support 332 is connected to the corners of the regular polygon frame 311. Since there is a connecting rib 312 and two regular polygon frames 311 at each corner of the regular polygon frame 311, it has good structural strength. By arranging the edge support 332 at the corner, local stress concentration on the base 310 is avoided, and the structural stability of the base 310 is improved.

[0074] Continue to refer to Figure 1 and Figure 7 , the hoisting system further includes at least two pipeline guides 20. The at least two pipeline guides 20 are arranged at intervals along the longitudinal direction of the tower of the wind turbine on the side wall of the tower 1. The pipeline guide 20 is formed into a frame structure, for example but not limited to, formed into a square frame structure, and the pipeline 2 is arranged in the internal cavity of the square frame structure. The present disclosure restricts the pipeline through the pipeline guide 20, avoiding the pipeline 2 from shaking and being scratched during the ascending process, or colliding with other components inside the tower, thereby improving the safety of the pipeline 2 hoisting process.

[0075] Continue to refer to Figure 7 , the pipeline guide 20 includes a guide wheel 201 and a guide wheel bracket 202. One end of the guide wheel bracket 202 is fixed on the side wall of the tower, and the guide wheel 201 is rotatably connected to the other end of the guide wheel bracket 202. Thus, by setting the guide wheel 201, during the movement of the pipeline 2, the friction between the pipeline 2 and the guide wheel 201 is rolling friction instead of sliding friction, reducing the wear of the pipeline 2.

[0076] In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present disclosure.

[0077] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present disclosure, unless otherwise specified, the meaning of "a plurality" is two or more.

[0078] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", and "fixed" should be construed broadly. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, an electrical connection, or a communication connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure may be understood according to specific circumstances.

[0079] The features, structures, or characteristics described in the present disclosure may be combined in any suitable manner in one or more embodiments. In the above description, numerous specific details are provided to give a thorough understanding of the embodiments of the present disclosure. However, those skilled in the art will realize that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, materials, etc. may be used. In other cases, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the present disclosure.

Claims

1. A hoisting system, characterized in that, For the hoisting of pipelines of a wind turbine generator set, the hoisting system includes: A lifting tool (10) for hoisting a pipeline (2). The lifting tool (10) includes a lifting lug assembly (11), a lifting tool body (12) and a lifting rope (13). The lifting tool body (12) is used to be arranged above the tower top platform of the wind turbine generator set. The lifting lug assembly (11) includes a lifting lug body (111) and an external sleeve (112). One end of the lifting lug body (111) is connected to the lifting tool body (12) through the lifting rope (13), and the other end is used to be inserted into the end of the pipeline. The external sleeve (112) is used to be sleeved outside the end of the pipeline, so that the end of the pipeline can be clamped between the other end and the external sleeve (112); A winding and unwinding rack (30) for being arranged at the tower bottom and supporting the pipeline (2).

2. The hoisting system according to claim 1, characterized in that, The lifting lug body (111) includes an ear plate (1111) and a core pipe joint (1113). The ear plate (1111) is connected to the lifting rope (13). The outer wall of the core pipe joint (1113) is smooth and can be inserted into the end of the pipeline. The ear plate (1111) and the core pipe joint (1113) are connected together through a flange.

3. The lifting system according to claim 1 or 2, characterized in that The winding and unwinding rack (30) includes a base (310), a rotating rack (320) and a rotation drive (340). The rotating rack (320) is rotatably connected above the base (310), and the rotation drive (340) is used to drive the rotating rack (320) to rotate.

4. The hoisting system according to claim 3, characterized in that, The rotating rack (320) includes an annular rotating rack (321), an axial rotating rack (323) and a plurality of guide rail brackets (322) connected between the axial rotating rack (323) and the annular rotating rack (321). The annular rotating rack (321) is rotatably connected to the base (310) around the central axis. The plurality of guide rail brackets (322) are arranged at intervals along the circumferential direction of the annular rotating rack (321), and each guide rail bracket (322) extends from the central axis to the annular rotating rack (321). The axial rotating rack (323) extends upward from the guide rail bracket (322) and is movably connected to the guide rail bracket (322).

5. The hoisting system according to claim 4, characterized in that, The winding and unwinding rack (30) further includes a support frame (330). The support frame (330) includes a middle support (331) and a plurality of edge supports (332) located on the same circumference. The center of the circumference is located on the axis of the middle support (331). The radially inner end of the guide rail bracket (322) is connected to the middle support (331), and the radially outer end is fixed on the annular rotating rack (321).

6. The hoisting system according to claim 5, characterized in that, The annular rotating frame (321) is of a circular ring structure, and the center of the annular rotating frame (321) is located on the axis of the middle support (331). The edge support (332) includes a roller bracket (3321) and a roller (3322). The bottom end of the roller bracket (3321) is fixed on the base (310), and the roller (3322) is rotatably connected to the top end of the roller bracket (3321). The rotation axis of the roller (3322) is arranged parallel to the radius of the annular rotating frame (321), so that the annular rotating frame (321) is rotatably supported on the roller (3322).

7. The hoisting system according to claim 4, wherein The rotating frame (320) further includes a slider (324). The slider (324) is fixed to the bottom of the axial rotating frame (323), and the slider (324) is movably connected to the guide rail bracket (322) along the extending direction of the guide rail bracket (322). At least one of the slider (324) and the guide rail bracket (322) is provided with a guide groove (326).

8. The hoisting system according to claim 5, characterized in that, The base (310) is composed of a regular polygon frame (311) and a plurality of connecting ribs (312). The outer ends of the plurality of connecting ribs (312) are respectively connected to the corners of the regular polygon frame (311), and the inner ends converge and are connected to the center of the regular polygon frame (311). The edge support (332) is connected to the corners of the regular polygon frame (311).

9. The hoisting system according to claim 7, characterized in that The extending direction of the guide rail bracket (322) is arranged parallel to the radius of the annular rotating frame (321).

10. The hoisting system according to claim 1 or 2, characterized in that, The hoisting system further includes at least two pipeline guiding members (20). The at least two pipeline guiding members (20) are longitudinally spaced apart on the side wall of the tower (1) of the wind turbine generator along the tower (1).

11. The hoisting system according to claim 10, characterized in that, The pipeline guiding member (20) includes a guide wheel (201) and a guide wheel bracket (202). One end of the guide wheel bracket (202) is fixed to the side wall of the tower (1), and the guide wheel (201) is rotatably connected to the other end of the guide wheel bracket (202).

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