Lift-up device

Abstract

To provide a lift-up device capable of shortening a construction period by reducing the number of lifting times of a stage for conveying an element member upward.SOLUTION: A lift-up device for conveying an element member upward when constructing a wind power generator includes a guide tower 21, and a stage 30 on which a mobile crane 50 including a slewing crane is placed and which is supported so as to be lifted and lowered with respect to the guide tower 21, and the stage 30 is cantilevered by the guide tower 21. The guide tower 21 is coupled to the tower body 11 via a stay ring 25. The lowermost position of the stage 30 is a height at which the mobile crane 50 on the ground can move.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a lift-up device that transports element members upward when constructing a high-rise structure. [Background technology]

[0002] Patent Document 1 and other documents disclose a construction method for constructing a wind turbine generator, which is a high-rise structure, using a lift-up device. The lift-up device is used to transport elemental members to the top of a tower under construction. The lift-up device includes a guide tower installed around the tower and a lifting device supported by the guide tower and configured to be able to move up and down.

[0003] In the wind turbine generator construction method disclosed in Patent Document 1, the lift-up device performs an assembly process in which the element members of the guide tower are transported upward and assembled in parallel with the process of transporting the element members of the tower upward. After the top tower of the tower is stacked, the lift-up device transports the nacelle and hub in order to the top of the tower and installs the nacelle and hub in order at the top of the tower. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2024-58668 Summary of the Invention [Problem to be solved by the invention]

[0005] In this way, the lift-up device not only transports the components of the wind power generator, but also the element members of the guide tower. As a result, the lift-up device has to be raised and lowered many times, making it difficult to further shorten the construction period. [Means for solving the problem]

[0006] The lift-up device that solves the above problem is a lift-up device that transports element members for constructing a high-rise structure upward, and is equipped with a guide tower that is installed along the high-rise structure, and a stage that can be mounted with a slewing crane and is supported so that it can be raised and lowered relative to the guide tower, and the stage is cantilevered on the guide tower. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to provide a lift-up device that reduces the number of times the stage is raised and lowered to transport element members upward, thereby shortening the construction period. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing a schematic configuration of a wind power generator, which is an example of a high-rise structure constructed by an embodiment of a lift-up device. [Figure 2] FIG. 10 is a side view showing the lift-up device, illustrating a state in which the stage is lowered to the lowest position and a mobile crane is placed on it. [Figure 3] FIG. 10 is a side view showing the lift-up device, illustrating the tower body in the middle of being constructed. [Figure 4] FIG. 2 is a side view showing the lift-up device, illustrating a state in which the stage is raised. DETAILED DESCRIPTION OF THE INVENTION

[0009] An embodiment of a lift-up device will be described with reference to FIGS. <Wind turbine> As shown in FIG. 1, the wind turbine generator 10 comprises a tower body 11 installed on a foundation, a nacelle 12 installed on the top of the tower body 11, and a rotor 13 attached to the nacelle 12.

[0010] The tower body 11 is formed by stacking multiple towers 11b, 11m, and 11t. The tower body 11 is formed by, from the bottom up, a bottom tower 11b, multiple middle towers 11m, and a top tower 11t. Note that the number of middle towers 11m is not particularly limited to this.

[0011] The rotor 13 includes a hub 14 and a plurality of blades 15a, 15b, and 15c extending radially from the hub 14. The hub 14 is provided with a plurality of blade attachment holes to which the base ends of the plurality of blades 15a, 15b, and 15c are attached, respectively. The three blades 15a, 15b, and 15c are arranged at 120-degree intervals around the hub 14.

[0012] The rotor 13 is constructed by transporting the hub 14 to the top of the tower body 11 and assembling it to the nacelle 12, and then transporting the blades 15a to 15c sequentially to the top of the tower body 11 and assembling them to the hub 14. The rotor 13 may also be constructed by transporting the blades 15a to 15c assembled to the hub 14 to the top of the tower body 11 and assembling them to the nacelle 12.

[0013] <Lift-up device> The lift-up device 20 used for constructing the tower body 11 and transporting the nacelle 12 will now be described.

[0014] As shown in FIGS. 2 and 3, the apparatus includes a guide tower 21 and a stage 30 that is supported by the guide tower 21 and is configured to be able to move up and down. <Guide Tower 21> The guide tower 21 has a substantially square frame-shaped base installed on the ground 1, and four support columns 22 installed around the tower body 11. The support columns 22 are connected to each other by truss beams 24. Each of the support columns 22 also has a truss structure. The four support columns 22 are divided into multiple blocks in the vertical direction.

[0015] A plurality of stay rings 25 serving as stay portions are provided between each support column 22 and the tower body 11. The plurality of stay rings 25 are provided at intervals from one another in the vertical direction. The guide tower 21 is supported by the tower body 11 via the stay rings 25. The stay ring 25 supports the guide tower 21 by hydraulically pressing the outer peripheral surface of the tower body 11 at the four corners of a square frame-shaped ring portion attached to the guide tower 21.

[0016] <Stage> The stage 30 is provided with a pair of horizontal frames 31 that extend in the front-to-rear direction and sandwich the guide tower 21. The horizontal frames 31 protrude forward from the guide tower 21 and also protrude rearward from the guide tower 21. The front of the horizontal frame 31 protrudes more than the rear from the guide tower 21. The stage 30 is cantilevered relative to the guide tower 21.

[0017] The stage 30 has a pair of horizontal frames 31 connected by a connecting portion with a predetermined distance between them in the front-to-rear direction. A stage portion 32f is provided between the pair of horizontal frames 31. Specifically, the stage portion 32f is disposed forward of the guide tower 21. A mobile crane 50 can be placed on this stage portion 32f.

[0018] A stage section 32r may also be provided in the area behind the guide tower 21. In this case, a counter device for balancing the weight of the stage 30 in the front-to-rear direction can be placed on the rear stage section 32r. The counter device includes a hydraulic device that supplies hydraulic pressure to jacks such as the lifting mechanism, and a generator that supplies electricity to the hydraulic device, etc.

[0019] The stage 30 is equipped with a pair of vertical frames 34 that sandwich the guide tower 21 in the width direction. The vertical frame 34 extends upward relative to the pair of horizontal frames 31 and is supported so as to be able to rise and fall relative to the guide tower 21. The vertical frame 34 is provided with an elevation mechanism (not shown) that raises and lowers the stage 30.

[0020] The lifting mechanism is equipped with a jack that has a cylinder and a piston housed in the cylinder, and is configured to be able to extend and retract in the vertical direction by changing the length of the piston protruding from the bottom end of the cylinder using hydraulic pressure. The stage 30 is configured to rise and fall along the guide tower 21 by repeatedly extending and retracting the jack.

[0021] Furthermore, the stage 30 is provided with a front reinforcing frame 36 that connects the front ends of the pair of horizontal frames 31 to the upper ends of the vertical frames 34, and a rear reinforcing frame 37 that connects the rear ends of the pair of horizontal frames 31 to the upper ends of the vertical frames 34.

[0022] In this way, with the vertical frame 34 of the stage 30 protruding upward relative to the stage portions 32f and 32r, the stage 30 can be lowered to the ground 1 or to a position close to the ground 1. This height is the height at which the mobile crane 50 can move to the stage portion 32f using the carrier 52 that the mobile crane 50 itself is equipped with.

[0023] <Slewing crane> In this embodiment, the mobile crane 50 is a crawler crane. The mobile crane 50 comprises an upper body 51 and a carrier 52. The upper body 51 comprises a jib 51a, a wire rope 51b (see FIG. 4), a hook 51c (see FIG. 4), a winch, and other crane attachments. The upper body 51 is a base for mounting the crane attachments. The upper body 51 comprises a driving device such as an engine and a hydraulic pump for driving the crane attachment, and a cab equipped with operating devices operated by an operator. The upper body 51 can rotate 360° relative to the carrier 52. As an example, the mobile crane 50 has a maximum lifting load of approximately 350 tons.

[0024] The carrier 52 includes a crawler and a drive device such as an engine for driving the crawler. The carrier 52 is rotatably connected to the upper body 51 via a swivel device provided on the top.

[0025] The mobile crane 50 can transport the guide tower 21 and bottom tower 11b on the ground 1. Furthermore, the mobile crane 50 can move to the stage 30 under its own power when the stage 30 is at its lowest position. Furthermore, the mobile crane 50 can rotate the upper body 51 relative to the carrier 52 even when on the stage 30. Therefore, the mobile crane 50 can lift and transport component parts of the guide tower 21 (such as the columns 22, trussing 24, and stay rings 25) over a wide range in both the horizontal and vertical directions. It can also lift and transport component parts of the wind power generator 10 (such as the middle tower 11m, top tower 11t, nacelle 12, hub 114, and blades 15a-15c). The mobile crane 50 can lift and transport component parts of the wind power generator 10 and guide tower 21 in a shorter time than it takes to raise and lower the stage 30 because it can use a winch to wind up and lower the wire rope 51b.

[0026] <Construction of wind turbines and guide towers> As shown in FIG. 2, in the initial construction stage of the guide tower 21, the component members of the guide tower 21 are assembled and installed at the location where the tower main body 11 will be constructed using a mobile crane 50 or another mobile crane. Then, inside the guide tower 21, the bottom tower 11b is installed on the foundation. After the bottom tower 11b is installed, the guide tower 21 is installed around it. Next, the mobile crane 50 suspends the stay ring 25 and moves it to the top of the guide tower 21. The stay ring 25 is then attached between the tower main body 11 and the guide tower 21. After that, the pressing unit is hydraulically driven to press the tower main body 11.

[0027] Prior to lifting, transporting, and installing the bottom tower 11b or the stay ring 25, a stage 30 is installed on the guide tower 21. The height of the stage 30 is set to a height that allows the mobile crane 50 to move under its own power relative to the stage 30. The mobile crane 50 moves under its own power onto the stage 30 and is placed thereon.

[0028] Next, as shown in Figure 3, when stacking the middle towers 11m, the stage 30 is raised along the guide towers 21 to a first predetermined height as needed. At the predetermined height, the mobile crane 50 lifts and transports the element members of the guide tower 21 from the ground 1, and the guide tower 21 is extended and assembled upward. The mobile crane 50 also lifts and transports the next middle tower 11m from the ground 1 and stacks it on top of the stacked middle tower 11m. Then, as needed, a stay ring 25 is installed on top of the guide tower 21.

[0029] As shown in Figure 4, when installing the top tower 11t, the stage 30 is raised to an even higher second height position with the mobile crane 50 placed on it. Then, the mobile crane 50 hoists the top tower 11t and installs it at the tip of the middle tower 11m. At this time, the top of the guide tower 21 is lower than the top of the top tower 11t. After this, the nacelle 12, rotor 13, etc. will be installed, and the mobile crane 50 can raise and lower the jib 51a to lift and transport the nacelle 12, rotor 13, etc. to the top end of the tower body 11 on which the uppermost top tower 11t has been installed.

[0030] In other words, by raising and lowering the jib 51a, it is not necessary to further extend the guide tower 21 upward in the state shown in FIG. 4 and raise the stage 30. For example, the height of the stage 30 when lifting and transporting the top tower 11t can be made the same as the height when transporting the nacelle 12. Then, while maintaining the stage 30 at the second height position, the mobile crane 50 lifts the nacelle 12 from the ground 1 and lifts and transports it to the top of the top tower 11t. The nacelle 12 is then installed on the top of the top tower 11t. Next, the mobile crane 50 transports the hub 14 from the ground 1 to the installation position of the nacelle 12, and the hub 14 is installed on the nacelle 12. After that, the mobile crane 50 lifts the blade 15a from the ground 1 to the position of the hub 14 and attaches it to the blade attachment hole of the hub 14. Next, the hub 14 is rotated by the turning device, and the next blade 15b is attached to the next hub attachment hole. Then, blade 15c is attached to hub 14 in a similar manner.

[0031] <Dismantling the Guide Tower> To dismantle the guide tower 21, the mobile crane 50 is used to remove the element members from the top of the guide tower 21 in order, then the stage 30 is lowered to the next height position, at which point the mobile crane 50 is used to remove the next element member. By repeating these steps, the guide tower 21 can be dismantled from the top end side.

[0032] Alternatively, the guide tower 21 may be lowered by removing the block of the guide tower 21 located at the lowest level. In this case, prior to lowering the stage 30, the support columns are installed on the base on the ground 1, and the stage 30 is lowered until the lower ends of the vertical frames 34 contact the upper ends of the support columns. Next, the pressing force of the pressing parts of the stays 25 is released, and the stays 25 are released. Then, the truss beams 24 are removed from the block at the lowest level, and the four support columns 22 at the lowest level are removed. Thereafter, the lifting mechanism of the stage 30 is driven, and the guide tower 21 is lowered until it contacts the base. By repeating these steps, the guide tower 21 can be dismantled.

[0033] <Effects of this embodiment> The effects of this embodiment will be described. (1) Taking into consideration the lifting height of the mobile crane 50, the assembled height of the guide tower 21 can be reduced, and the number of times the stage 30 is raised and lowered can also be reduced. Therefore, the lift-up device 20 can shorten the construction period.

[0034] (2) The guide tower 21 can be assembled using the mobile crane 50, eliminating the need for the conventional assembly operation of lifting the guide tower. Therefore, the lift-up device 20 also contributes to shortening the construction period.

[0035] (3) The mobile crane 50 can be easily installed on the stage 30. The mobile crane 50 can be used for lifting and transporting using the jib 51a and winch. Therefore, the lift-up device 20 can significantly reduce the construction period compared to when a platform corresponding to the element members to be transported is provided on the stage 30 and the element members are transported.

[0036] (4) The tower body 11 is supported via the stay ring 25, which prevents the guide tower 21 from tipping over. Since the conventional assembly method using the lifting operation of the guide tower is not used, the stay ring 25 does not require a roller at the pressing portion to lift the guide tower 21.

[0037] (5) The vertical frame 34 of the stage 30 protrudes upward relative to the stage sections 32f, 32r, so that the stage 30 can be lowered to the ground 1 or to a position close to the ground 1. This allows the mobile crane 50 to move onto the stage 30 under its own power.

[0038] <Modification> This embodiment can be modified as follows: This embodiment and the following modifications can be combined and implemented within the scope of technical compatibility.

[0039] The crane placed on the stage 30 does not have to be the mobile crane 50. The crane may be one that is rotatably installed on the stage 30. In this case, the stage 30 is provided with a rotation device for rotating the upper body 51.

[0040] The crane may be a hydraulic crane instead of a jib crane. The crane may be manned and operated from a cab, or it may be remotely controlled and unmanned.

[0041] The stage 30 may be provided with an imaging device so that an operator in the driver's seat of the mobile crane 50 can visually check what is below the stage 30. Of course, the image data captured by the imaging device may be displayed on a monitor in the driver's seat as well as on a monitor in the management office, etc.

[0042] The guide tower 21 is not limited to being constructed so as to surround the tower body 11 and connecting the guide tower 21 and the tower body 11 with stays 25. For example, the guide tower may be constructed along the side of a high-rise structure and connected with stays.

[0043] The guide tower may be a free-standing type that does not require a stay section to connect to the high-rise structure. The high-rise structure is not limited to the wind turbine generator 10. For example, it may be a high-rise building that houses a complex of houses, offices, commercial facilities, etc. It may also be a radio tower, etc.

[0044] <Additional Notes> Further technical ideas that can be understood from the above-described embodiments and modifications will be described below. (Appendix 1) The stage includes a stage portion on which the rotary crane is placed and a vertical frame having an elevating mechanism for raising and lowering the stage along the guide tower, and the vertical frame protrudes upward from the stage portion. Lift-up device.

[0045] (Appendix 2) The stage section is configured so that one side is wider than the other side with respect to the guide tower, and the slewing crane is placed on the stage on one side. Lift-up device.

[0046] (Appendix 3) The guide tower is configured to be lower than the high-rise structure. Lift-up device.

[0047] (Appendix 4) A construction method for transporting element members for constructing a high-rise structure upward using a lift-up device, comprising: a slewing crane is placed on a stage that is provided so as to be able to ascend and descend on a guide tower provided along the high-rise structure; Lifting and transporting the element member with the slewing crane; The guide tower is lower than the high-rise structure, and the portion higher than the guide tower is used to lift and transport the element members with the rotary crane. Construction method. [Explanation of symbols]

[0048] 1...ground, 10...wind turbine generator, 11...tower body, 11b...bottom tower, 11m...middle tower, 11t...top tower, 12...nacelle, 13...rotor, 14...hub, 15a-15c...blades, 20...lift-up device, 21...guide tower, 22...support, 24...truss beam, 25...staying, 30...stage, 31...horizontal frame, 32f, 32r...stage section, 34...vertical frame, 50...mobile crane, 51...upper body, 51a...jib, 52...carrier.

Claims

1. A lift-up device that transports element members upward for constructing a high-rise structure, a guide tower provided along the high-rise structure; a stage on which a rotary crane can be placed and which is supported so as to be able to rise and fall relative to the guide tower; The stage is cantilevered on the guide tower. Lift-up device.

2. The guide tower is connected to the high-rise structure via a stay portion. The lift-up device according to claim 1 .

3. The slewing crane is a mobile crane including an upper body with a jib and a carrier on which the upper body is rotatably mounted, The lowest position of the stage is at a height at which the mobile crane on the ground can move relative to the stage. The lift-up device according to claim 1 or 2.

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