Tower crane device

Abstract

The utility model provides a tower crane device, tower crane device includes: base subassembly, the detachable connection with base subassembly, the boom subassembly includes first boom section and second boom section, and first boom section and second boom section are detachable connection. The tower crane device provided by the embodiment of the disclosure divides the tower crane device into base subassembly, first boom section, second boom section and a plurality of modules, so that the weight of single component is low, a small auxiliary crane can be used to hoist base subassembly, first boom section, second boom section and a plurality of modules to the nacelle or tower drum of wind turbine generator respectively, and each module is assembled on the nacelle or tower drum. The boom subassembly is designed as a multi-section structure, so that first boom section and second boom section are detachable, the size of each section is reduced, and the transportation of the boom subassembly is also facilitated.

Description

Technical Field

[0001] This disclosure relates to the field of wind power generation technology, specifically to a tower crane device. Background Technology

[0002] Currently, the wind power industry is seeing an increasing number of large-scale wind turbines, which in turn increase the size of their components. When problems arise with components such as gearboxes, generators, blades, and impellers, large cranes are needed for replacement. The use of large cranes not only incurs high lifting costs, but is also subject to environmental conditions, involving road construction and land acquisition issues, resulting in long maintenance cycles and significant economic losses.

[0003] Develop a modular tower crane structure design that allows for the replacement of large components such as the gearbox and generator of a wind turbine generator set without using a large crane, utilizing the unit's own interfaces. Utility Model Content

[0004] The main purpose of this disclosure is to provide a tower crane device to solve the problems in the related art where the replacement of large components of wind turbine generators requires the use of large cranes, which is costly and involves road construction and land acquisition issues, resulting in long maintenance cycles and significant economic losses.

[0005] To achieve the above objectives, a first aspect of this disclosure provides a tower crane device for wind turbine generator sets. The tower crane device includes: a base assembly; and a boom assembly detachably connected to the base assembly. The boom assembly includes a first boom section and a second boom section, which are detachably connected.

[0006] In some embodiments, the boom assembly further includes: a first rotary drive unit connecting the base assembly and the first boom segment, wherein a first end of the first boom segment is movably connected to the base assembly, and the first rotary drive unit is used to drive the first boom segment to rotate relative to the base assembly; and a second rotary drive unit connecting the first boom segment and the second boom segment, wherein the second boom segment is rotatably connected to a second end of the first boom segment, and the second rotary drive unit is used to drive the second boom segment to rotate relative to the first boom segment.

[0007] In some embodiments, the second boom section includes a boom body and a telescopic boom. A first end of the boom body is connected to the first boom section, and a second end of the boom body is connected to the telescopic boom. The telescopic boom is capable of extending away from the first boom section relative to the boom body in the extension direction of the boom body and retracting towards the first boom section.

[0008] In some embodiments, the boom body is sleeved outside the telescopic boom, or the telescopic boom is sleeved outside the boom body. The tower crane device also includes a telescopic drive unit, which connects the boom body and the telescopic boom and is used to drive the telescopic boom to extend or retract relative to the boom body.

[0009] In some embodiments, the first rotary drive unit is a hydraulic cylinder, and the two ends of the hydraulic cylinder are detachably connected to the base assembly and the first boom section, respectively, so that the first rotary drive unit can be hoisted separately onto the nacelle or tower of the wind turbine generator set.

[0010] In some embodiments, the second rotary drive unit is a hydraulic cylinder, the first boom section has a receiving cavity inside, the first end of the second rotary drive unit extends into the receiving cavity and is connected to the inner sidewall of the first boom section, and the second end of the second rotary drive unit is detachably connected to the second boom section so that the second rotary drive unit can be hoisted onto the nacelle or tower of the wind turbine generator along with the first boom section.

[0011] In some embodiments, the tower crane assembly further includes a winch that can be detachably mounted on the base assembly or the boom assembly.

[0012] In some embodiments, the base assembly is provided with a connecting portion for detachably connecting to the nacelle or tower of the wind turbine generator set.

[0013] In some embodiments, the base assembly includes: a fixed base for fixedly connecting to the nacelle or tower of a wind turbine generator set; a rotating base disposed above the fixed base; and a rotary bearing disposed between the rotating base and the rotating base, the rotary bearing connecting the rotating base and the fixed base to enable the rotating base to rotate relative to the fixed base.

[0014] In some embodiments, the tower crane device further includes a pump station module disposed on one side of the rotating base, with one end of the pump station module near the rotating base connected to the side wall or top wall of the rotating base; the tower crane device further includes a support rod, with a first end connected to the side wall of the rotating base, and a second end connected to the bottom wall of the pump station module away from the rotating base, and the support rod is inclined to support the pump station module.

[0015] The tower crane device provided in this embodiment is divided into multiple modules, such as a base assembly, a first boom section, and a second boom section. This results in low weight for individual components, allowing small auxiliary cranes to lift each module onto the nacelle or tower of the wind turbine generator. Assembly of each module is then performed on the nacelle or tower, eliminating the need for lifting the entire tower crane device. This solves the problem of high costs associated with replacing large components of wind turbine generators, which requires large cranes, involves road construction and land acquisition, and leads to long maintenance cycles and significant economic losses. Furthermore, the boom assembly is designed as a multi-segment structure, allowing the first and second boom sections to be disassembled and reassembled, reducing the size of each segment and facilitating the transportation of the boom assembly.

[0016] Other aspects and / or advantages of the present invention will be set forth in part in the description which follows, and in part will be clear from the description or may be learned by practice of the present invention. Attached Figure Description

[0017] The above and other objects and features of the present invention will become clearer from the following description, taken in conjunction with the accompanying drawings, which exemplarily illustrate an example, wherein: Figure 1 This is a structural schematic diagram of a tower crane device according to an embodiment of the present utility model; Figure 2 This is another structural schematic diagram of a tower crane device according to one embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the first boom section of a tower crane device according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the boom body of a tower crane device according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the telescopic wall of a tower crane device according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the base assembly of a tower crane device according to an embodiment of the present invention; Figure 7 This is a partial structural schematic diagram of a tower crane device according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the pump station structure of a tower crane device according to an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 10. Base assembly, 110. Fixing base, 111. Connecting part, 120. Rotating base, 121. Mounting bracket, 130. Rotary bearing, 140. Support rod. 20. Boom assembly, 210. First boom section, 211. Receiving cavity, 212. Mounting base, 220. First rotary drive unit, 230. Second boom section, 231. Boom body, 2311. First side wall, 2312. Second rotary drive unit connecting frame, 2313. First pulley mounting frame, 2314. Telescopic drive unit first connecting frame, 232. Telescopic boom, 2321. Telescopic drive unit second connecting frame, 2322. Second pulley mounting frame, 240. Second rotary drive unit, 250. Telescopic drive unit, 30. Winch, 40. Pump station module, 50. Pulley. Detailed Implementation

[0019] The following detailed embodiments are provided to aid the reader in gaining a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will become apparent upon understanding this disclosure. For example, the order of operations described herein is merely illustrative and is not limited to those orders set forth herein, but may be changed as will become clear upon understanding this disclosure, except for operations that must occur in a specific order. Furthermore, for clarity and conciseness, descriptions of features known in the art may be omitted.

[0020] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many feasible ways of implementing the methods, apparatus and / or systems described herein, many of which will become clear upon understanding the disclosure of this application.

[0021] Although terms such as “first” and “second” may be used herein to describe various components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts should not be limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teaching of the examples described herein, the first component, first assembly, first region, first layer, or first part referred to as the first component, first assembly, first region, first layer, or first part may also be referred to as the second component, second assembly, second region, second layer, or second part.

[0022] In the specification, when an element such as a layer, region, or substrate is described as being "on" another element, "connected to," or "bonded to" another element, the element may be directly "on" another element, directly "connected to," or "bonded to" the other element, or one or more other elements may be present in between. Conversely, when an element is described as being "directly on" another element, "directly connected to," or "directly bonded to" another element, no other elements may be present in between.

[0023] The terminology used herein is for the purpose of describing various examples only and is not intended to limit disclosure. Unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well. The terms “comprising,” “including,” and “having” indicate the presence of the described features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof. The term “a plurality” represents any quantity of two or more.

[0024] The directional terms such as "upper," "lower," "top," and "bottom" used in this application are all based on the orientation of the product when it is in normal use.

[0025] Unless otherwise defined, all terms used herein, including technical and scientific terms, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains after understanding the invention. Unless expressly defined herein, terms such as those defined in a general dictionary shall be interpreted as having a meaning consistent with their meaning in the context of the relevant field and in this invention, and shall not be interpreted in an idealized or overly formalistic manner.

[0026] Furthermore, in the description of the examples, detailed descriptions of well-known related structures or functions will be omitted when it is believed that such detailed descriptions would lead to a vague interpretation of the present invention.

[0027] Currently, the wind power industry is seeing an increasing number of large-scale wind turbines, which in turn increase the size of their components. When problems arise with components such as gearboxes, generators, blades, and impellers, large cranes are needed for replacement. The use of large cranes not only incurs high lifting costs, but is also subject to environmental conditions, involving road construction and land acquisition issues, resulting in long maintenance cycles and significant economic losses.

[0028] Therefore, this disclosure proposes a modular tower crane device, which divides the tower crane device into multiple modules and the boom assembly into multiple segments. Each module is small in size and light in weight. Each module can be hoisted onto the nacelle or tower of the wind turbine generator using a small auxiliary crane. This allows for the replacement of large components such as the gearbox, generator, and blades of the wind turbine generator by utilizing the interface of the wind turbine generator's nacelle or tower without the use of a large crane.

[0029] The following will combine Figures 1 to 8 This invention introduces a tower crane device provided by an embodiment of the present invention.

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, a first aspect of this disclosure provides a tower crane device for a wind turbine generator set. The tower crane device includes a detachably connected base assembly 10 and a boom assembly 20. The boom assembly 20 includes a first boom section 210 and a second boom section 230, which are detachably connected. The base assembly 10, the first boom section 210, and the second boom section 230 can be respectively hoisted onto the nacelle or tower of the wind turbine generator set.

[0031] The tower crane device provided in this embodiment is divided into multiple modules such as a base assembly 10, a first boom section 210, and a second boom section 230. This results in low weight for individual components, allowing small auxiliary cranes to be used to hoist the base assembly 10, the first boom section 210, the second boom section 230, and other modules onto the nacelle or tower of the wind turbine generator. The modules are then assembled on the nacelle or tower without the need to lift the entire tower crane device. Therefore, large cranes are not required, solving the problem that replacing large components of wind turbine generators requires the use of large cranes, which is costly and involves road construction and land acquisition issues, resulting in long maintenance cycles and significant economic losses.

[0032] It is worth noting that the large crane booms in related technologies are quite long and have a very large overall weight. The containers used to hold the booms are over 15 meters long, which makes transportation inconvenient. The embodiments of this disclosure design the boom assembly 20 as a multi-segment structure, so that the first boom segment 210 and the second boom segment 230 can be disassembled, reducing the size of each segment and facilitating the transportation of the boom assembly 20.

[0033] Furthermore, in some embodiments, such as Figure 1 and Figure 2 As shown, the first end of the first boom section 210 is movably connected to the base assembly 10, and the second end of the first boom section 210 is rotatably connected to the second boom section 230. The tower crane device also includes a first rotary drive unit 220 connecting the base assembly 10 and the first boom section 210. The first rotary drive unit 220 can drive the first boom section 210 to rotate relative to the base assembly 10, thereby adjusting the working angle of the first boom section 210. As an example, optionally, the first rotary drive unit 220 is a hydraulic cylinder. The rotation of the first boom section 210 is achieved by the extension and retraction of the hydraulic cylinder connecting the base assembly 10 and the first boom section 210, thereby adjusting the working radius of the first boom section 210, making it more flexible and improving work efficiency.

[0034] Furthermore, in some embodiments, such as Figure 1 and Figure 2 As shown, the tower crane device also includes a second rotary drive unit 240 connecting the first boom section 210 and the second boom section 230. The second rotary drive unit 240 can drive the second boom section 230 to rotate relative to the first boom section 210, thereby adjusting the working angle of the second boom section 230. Optionally, as an example, the second rotary drive unit 240 can be a hydraulic cylinder. The rotation of the second boom section 230 is achieved by the extension and retraction of the hydraulic cylinder connecting the second boom section 230 and the first boom section 210, thus adjusting the working radius of the second boom section 230, making it more flexible and improving operational efficiency.

[0035] Furthermore, in some embodiments, such as Figure 1 and Figure 2As shown, the first rotary drive unit 220 is a hydraulic cylinder, with both ends detachably connected to the base assembly 10 and the first boom section 210, respectively, so that the first rotary drive unit 220 can be individually hoisted onto the nacelle or tower of the wind turbine generator. This configuration, by disassembling the first rotary drive unit 220 into individual modules for hoisting, reduces the weight of each module being hoisted, facilitating the hoisting process.

[0036] Furthermore, regarding the specific connection structure between the first rotary drive unit 220, the first boom section 210, and the base assembly 10, as an example, optionally, such as... Figure 1 and Figure 2 As shown, a mounting bracket 121 is provided on the base assembly 10, and a first connecting hole is provided at the first end of the first rotary drive unit 220. The first end of the first rotary drive unit 220 is rotatably connected to the mounting bracket 121 by bolts or pins; Figure 3 As shown, a mounting base 212 protrudes from the outer side wall of the first boom section 210. A mounting hole is provided on the side wall of the mounting base 212 and / or the side wall of the first boom section 210. A second connecting hole is provided at the second end of the first rotary drive unit 220. A bolt or pin passes through the second connecting hole and the mounting hole to connect the second end of the first rotary drive unit 220 and the first boom section 210. The connection between the second end of the first rotary drive unit 220 and the first boom section 210 is rotatable.

[0037] Furthermore, in some embodiments, the second rotary drive unit 240 is a hydraulic cylinder, such as... Figure 1 and Figure 2 As shown, the first boom section 210 has a receiving cavity 211 inside. The first end of the second rotary drive unit 240 extends into the receiving cavity 211 and is connected to the inner side wall of the first boom section 210. The second end of the second rotary drive unit 240 is detachably connected to the second boom section 230 so that the second rotary drive unit 240 can be hoisted onto the nacelle or tower of the wind turbine generator along with the first boom section 210.

[0038] In these embodiments, the second rotary drive unit 240 is disposed in the receiving cavity 211 of the first boom section 210 and connected to the first boom section 210, so that the second rotary drive unit 240 and the first boom section 210 can be hoisted together onto the nacelle or tower of the wind turbine generator, thereby reducing the number of hoisting operations.

[0039] It is worth noting that, in actual products, the weight of the second rotary drive unit 240 and the first boom section 210 is generally not excessive, and both can be lifted together by a small auxiliary crane. Understandably, if either the second rotary drive unit 240 or the first boom section 210 is heavier, they can be separated and lifted separately.

[0040] Furthermore, regarding the specific connection structure between the second rotary drive unit 240 and the second boom section 230, as an example, optionally, such as... Figure 2 and Figure 4 As shown, the second boom section 230 includes a first sidewall 2311. During the rotation of the second boom section 230 relative to the first boom section 210, the first sidewall 2311 can face the second boom section 230. The second end of the second rotary drive unit 240 extends out of the receiving cavity 211 and connects to the first sidewall 2311 of the second boom section 230. As an example, optionally, a second rotary drive unit connecting frame 2312 is provided on the first sidewall 2311 of the second boom section 230. The second rotary drive unit connecting frame 2312 is provided with mounting holes, and bolts or pins pass through the mounting holes to connect the second end of the second rotary drive unit 240 and the second rotary drive unit connecting frame 2312.

[0041] Furthermore, in some embodiments, such as Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the second boom section 230 includes a boom body 231 and a telescopic boom 232. The first end of the boom body 231 is connected to the first boom section 210, and the second end of the boom body 231 is connected to the telescopic boom 232. The telescopic boom 232 can extend away from the first boom section 210 relative to the boom body 231 in its extension direction and retract towards the first boom section 210. This configuration, with the telescopic boom 232, allows the second boom section 230 to meet lifting requirements for different lengths.

[0042] Regarding the connection structure between the arm body 231 and the telescopic arm 232, in some embodiments, such as Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the arm body 231 is fitted over the telescopic arm 232, or the telescopic arm 232 is fitted over the arm body 231. It is understood that both the arm body 231 and the telescopic arm 232 are hollow structures, facilitating their interlocking. Furthermore, anti-wear and lubricating materials are provided between the interlocking portions of the arm body 231 and the telescopic arm 232 to reduce friction generated during relative movement and to minimize wear on both components.

[0043] Furthermore, as an example, the wear-resistant and lubricating materials can optionally be PETP (polyethylene terephthalate) and PTFE (polytetrafluoroethylene). PETP possesses excellent sliding properties and low sliding wear characteristics. PTFE has extremely excellent self-lubricating properties and is one of the solid materials with the lowest coefficient of friction, down to 0.05. During friction, the PTFE molecules that are worn away form a lubricating film on the surface of the part, providing excellent lubrication.

[0044] Furthermore, such as Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in order to realize the telescopic boom 232's telescopic movement relative to the boom body 231, the tower crane device also includes a telescopic drive unit 250. The telescopic drive unit 250 connects the boom body 231 and the telescopic boom 232, and is used to drive the telescopic boom 232 to extend and retract relative to the boom body 231. As an example, optionally, a first connecting frame 2314 of the telescopic drive unit is provided on the outer wall of the boom body 231, and a second connecting frame 2321 of the telescopic drive unit is provided on the outer wall of the telescopic boom 232. The telescopic drive unit 250 includes an outer sleeve and a telescopic rod. The telescopic rod can reciprocate by extending and retracting relative to the outer sleeve. One of the telescopic rod and the outer sleeve is connected to the first connecting frame 2314 of the telescopic drive unit, and the other is connected to the second connecting frame 2321 of the telescopic drive unit.

[0045] As an example, the telescopic drive unit 250 may optionally be a hydraulic cylinder, which drives the telescopic arm 232 to move by extending and retracting the hydraulic rod.

[0046] In some embodiments, such as Figure 1 and Figure 2 As shown, the tower crane device also includes a winch 30, which can be detachably mounted on the base assembly 10 or the boom assembly 20.

[0047] In these embodiments, the winch 30 is a separate module that can be hoisted separately onto the nacelle or tower and then installed onto the base assembly 10 or the boom assembly 20.

[0048] It is worth noting that in related technologies, the winch 30 of the crane is generally located at the base of the tower, far from the nacelle or tower of the wind turbine generator. The crane's wire rope is long and heavy, requiring a large hook weight to ensure smooth descent, which increases the overall weight of the crane. Furthermore, because the winch 30 is located at the base of the tower, the turbine generator cannot yaw and resist vortices in extreme wind conditions after the crane is mounted, compromising the turbine's safety. This embodiment of the present disclosure installs the winch 30 along with the base assembly 10 or the boom assembly 20 onto the nacelle or tower, solving the problems of yaw and vortex resistance in extreme wind conditions and also addressing the issue of the heavy hook.

[0049] In some embodiments, such as Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, the base assembly 10 is provided with a connecting part 111 for detachably connecting to the nacelle or tower of the wind turbine generator set. As an example, the connecting part 111 may optionally include a plurality of connecting lugs disposed on the bottom surface of the base assembly 10, which are bolted or pinned through through holes in the connecting lugs and locked to the nacelle or tower.

[0050] It is worth noting that interfaces can be set at multiple locations on the nacelle or tower for installation with the connecting part 111. This allows the tower crane to be installed at different locations on the nacelle or tower depending on the location of the parts to be replaced. This facilitates the hoisting and replacement of large components such as gearboxes, generators, blades, and impellers of wind turbine generators using the tower crane.

[0051] Regarding the specific structure of the base assembly 10, in some embodiments, such as Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, the base assembly 10 includes: a fixed base 110 for fixed connection with the nacelle or tower of the wind turbine generator set; a rotating base 120 disposed above the fixed base 110; and a rotating bearing 130 disposed between the rotating base 120 and the rotating bearing 130, the rotating bearing 130 connecting the rotating base 120 and the fixed base 110 so that the rotating base 120 can rotate relative to the fixed base 110.

[0052] In these embodiments, the fixed base 110 is located below and serves as a support, and the connecting part 111 can be disposed on the lower surface of the fixed base 110; furthermore, the rotary bearing 130 is disposed between the rotary base 120 and the fixed base 110, so that the rotary base 120 can rotate relative to the fixed base 110, thereby driving the boom assembly 20 to rotate and adjust the lifting angle. The rotary base 120 can also serve to support and install other components of the tower lifting device, such as the winch 30, the pump station module 40, and the first boom section 210, which can all be disposed on the rotary base 120 or supported by the rotary base 120.

[0053] In some embodiments, such as Figure 1 , Figure 7 and Figure 8 As shown, the tower crane device also includes a pump station module 40, which is disposed on one side of the rotating base 120. The end of the pump station module 40 near the rotating base 120 is connected to the side wall or top wall of the rotating base 120. Figure 7 As shown, the tower crane device also includes a support rod 140. The first end of the support rod 140 is connected to the side wall of the rotating seat 120, and the second end of the support rod 140 is connected to the bottom wall of the pump station module 40 away from the rotating seat 120. The support rod 140 is inclined to support the pump station module 40.

[0054] In these embodiments, one end of the pump station module 40 near the rotating base 120 is connected to the side wall or top wall of the rotating base 120 via bolts or pins or other connecting components. As an example, optionally, such as... Figure 7 As shown, connecting lugs are provided on the top or side wall of the rotating base 120 and on the bottom wall of the pump station module 40. Bolts or pins pass through the through holes on the connecting lugs and connect the pump station module 40 and the rotating base 120. Furthermore, the end of the pump station module 40 away from the rotating base 120 is supported from below by an inclined support rod 140. Specifically, the first section of the support rod 140 is connected to the side wall of the rotating base 120 and is located at a relatively low position. The second end of the support rod 140 is connected to the bottom wall of the end of the pump station module 40 away from the rotating base 120. The support rod 140, the bottom wall of the pump station module 40, and the side wall of the rotating base 120 form a triangular structure, which has good support, is not easily deformed, and can stably support the pump station module 40. In addition, the support rod 140 also has the advantages of small size, light weight, and low cost.

[0055] It is worth noting that the winch 30 can be a hydraulic winch 30, and the first rotary drive unit 220, the second rotary drive unit 240, and the telescopic drive unit 250 can all be hydraulic cylinders. The pump station module 40 can be connected to the above-mentioned hydraulic equipment through pipelines, so that the pump station module 40 can supply liquid to the hydraulic winch 30, the first rotary drive unit 220, the second rotary drive unit 240, the telescopic drive unit 250, and other hydraulic equipment.

[0056] Furthermore, the tower crane device also includes a hook and a hoisting rope. The hoisting rope can be a steel wire rope. One end of the steel wire rope is wound on the winch 30, and the other end is connected to the hook. The winch 30 can tighten or release the steel wire rope to lift or lower the hook, thereby achieving the hoisting work through the hook.

[0057] Furthermore, the tower crane device is also equipped with pulleys 50 for smooth sliding of the hoisting rope. As an example, the pulleys 50 are optionally installed on the second boom section 230. There are multiple sets of pulleys 50. The first set of pulleys 50 is installed on the top surface of the second boom section 230 near the end of the first boom section 210. The second set of pulleys 50 is installed on the top of the second boom section 230 away from the first boom section 210. The third set of pulleys 50 is installed on the bottom of the second boom section 230 away from the first boom section 210. The hoisting rope is placed on the first set of pulleys 50 and the second set of pulleys 50 in sequence, and then wound around the third set of pulleys 50.

[0058] Regarding the mounting structure of pulley 50, as an example, optionally, such as Figure 4 As shown, a first pulley mounting bracket 2313 is provided on the top surface of the boom body 231 near the first boom section 210. The first pulley mounting bracket 2313 has through holes. The first set of pulleys 50 are mounted on the first pulley mounting bracket 2313 through shafts. A second pulley mounting bracket 2322 is provided on the end of the telescopic boom 232 away from the first boom section 210. The second pulley mounting bracket 2322 has through holes at both its upper and lower ends. The second set of pulleys 50 are mounted in the through holes at the upper part of the second pulley mounting bracket 2322 through shafts. The third set of pulleys 50 are mounted in the through holes at the lower part of the second pulley mounting bracket 2322 through shafts.

[0059] Furthermore, the base assembly 10, the first boom section 210, the second boom section 230, the winch 30, the pump station module 40, and other modules to be hoisted are all provided with hoisting points. These hoisting points, in conjunction with an auxiliary crane, are used to hoist the base assembly 10, the first boom section 210, the second boom section 230, the winch 30, the pump station module 40, and other modules to be hoisted onto the nacelle or tower of the wind turbine generator set, which facilitates the hoisting process.

[0060] While the embodiments of the present invention have been described in detail above, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope thereof. It should be understood that, to those skilled in the art, these modifications and variations will still fall within the spirit and scope of the embodiments of the present invention as defined in the claims.

Claims

1. A tower crane device for wind turbine generator sets, characterized in that, The tower crane device includes: Base assembly (10); The boom assembly (20) is detachably connected to the base assembly (10). The boom assembly (20) includes a first boom section (210) and a second boom section (230), which are detachably connected.

2. The tower crane device according to claim 1, characterized in that, The boom assembly (20) also includes: A first rotary drive unit (220) connects the base assembly (10) and the first boom section (210). The first end of the first boom section (210) is movably connected to the base assembly (10). The first rotary drive unit (220) is used to drive the first boom section (210) to rotate relative to the base assembly (10). The second rotary drive unit (240) connects the first boom section (210) and the second boom section (230). The second boom section (230) is rotatably connected to the second end of the first boom section (210). The second rotary drive unit (240) is used to drive the second boom section (230) to rotate relative to the first boom section (210).

3. The tower crane device according to claim 2, characterized in that, The second boom section (230) includes a boom body (231) and a telescopic boom (232). The first end of the boom body (231) is connected to the first boom section (210), and the second end of the boom body (231) is connected to the telescopic boom (232). The telescopic boom (232) can extend away from the first boom section (210) relative to the boom body (231) in the extension direction of the boom body (231) and retract towards the first boom section (210).

4. The tower crane device according to claim 3, characterized in that, The boom body (231) is sleeved on the outside of the telescopic boom (232), or the telescopic boom (232) is sleeved on the outside of the boom body (231). The tower crane device also includes a telescopic drive unit (250), which connects the boom body (231) and the telescopic boom (232) and is used to drive the telescopic boom (232) to extend or retract relative to the boom body (231).

5. The tower crane device according to claim 2, characterized in that, The first rotary drive unit (220) is a hydraulic cylinder, and the two ends of the hydraulic cylinder are detachably connected to the base assembly (10) and the first boom section (210) respectively, so that the first rotary drive unit (220) can be hoisted onto the nacelle or tower of the wind turbine generator set separately.

6. The tower crane device according to claim 2, characterized in that, The second rotary drive unit (240) is a hydraulic cylinder. The first boom section (210) has a receiving cavity (211) inside. The first end of the second rotary drive unit (240) extends into the receiving cavity (211) and is connected to the inner wall of the first boom section (210). The second end of the second rotary drive unit (240) is detachably connected to the second boom section (230) so that the second rotary drive unit (240) can be hoisted onto the nacelle or tower of the wind turbine generator along with the first boom section (210).

7. The tower crane device according to any one of claims 1 to 4, characterized in that, The tower crane device also includes: The winch (30) can be detachably mounted on the base assembly (10) or the boom assembly (20).

8. The tower crane device according to any one of claims 1 to 4, characterized in that, The base assembly (10) is provided with a connecting part (111) for detachably connecting to the nacelle or tower of the wind turbine generator set.

9. The tower crane device according to any one of claims 1 to 4, characterized in that, The base assembly (10) includes: The mounting base (110) is used for fixed connection with the nacelle or tower of the wind turbine generator set; A rotating seat (120) is disposed above the fixed seat (110); A rotary bearing (130) is disposed between the rotary seat (120) and the rotary bearing (130), the rotary bearing (130) connecting the rotary seat (120) and the fixed seat (110) so that the rotary seat (120) can rotate relative to the fixed seat (110).

10. The tower crane device according to claim 9, characterized in that, The tower crane device also includes a pump station module (40), which is located on one side of the rotating seat (120). The end of the pump station module (40) near the rotating seat (120) is connected to the side wall or top wall of the rotating seat (120). The tower crane device also includes a support rod (140), the first end of which is connected to the side wall of the rotating seat (120), the second end of which is connected to the bottom wall of the pump station module (40) away from the rotating seat (120), and the support rod (140) is inclined to support the pump station module (40).

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