How to erect the tower body

Abstract

To provide an erecting device and an erecting method of a tower body that can realize efficient unloading and erecting of a tower body while eliminating the need for large-scale equipment and its installation work.SOLUTION: An erecting device 100 of a tower body includes a pair of support structures 50 arranged at a distance t for a transport vehicle D carrying a tower body T to enter. Each support structure 50 comprises a leg member 10 and a receiving member 20 supported by the leg member 10. A rotating shaft 60 is provided at one end Ta of the tower body T. The rotating shaft 60 is moved onto the receiving member 20 from the transport vehicle D. The tower body T is erected while the rotating shaft 60 rotates on the receiving member 20.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a tower body. Construction This is about how to wake it up. [Background technology]

[0002] Renewable energy sources such as solar, wind, geothermal, hydroelectric, and biomass are important low-carbon domestic energy sources that do not emit greenhouse gases, can be produced domestically, and contribute to energy security. Among these, wind energy has attracted attention because it can be converted into electrical energy with high efficiency and, unlike solar power generation, can generate electricity even at night as long as there is wind, and power generation systems are being developed and constructed both onshore and offshore. In onshore wind power generation systems, the towers that make up the power-generating wind turbines (tower-shaped structures), which are the main components, can be as tall as 50 meters or more. The above-mentioned long tower is divided into multiple tower bodies, and the divided tower bodies are erected and installed at the installation site, and the multiple tower bodies are stacked one on top of the other in order to construct a tower of a predetermined length. Since the tower body divided into multiple parts is basically long and heavy, when the tower body is transported to the construction site by a transport vehicle and then unloaded and then erected, a double lifting method is generally used, for example, by using two cranes to lift both ends of the tower body. However, onshore wind power generation facilities are often located in mountainous areas, and the installation area for the towers is often narrow. Therefore, if there is not enough space to place two large cranes, it may not be possible to unload and erect the tower body. Furthermore, even if space for two cranes could be secured, two large cranes would need to be kept on standby throughout the work period, which would increase construction costs.

[0003] Therefore, Patent Document 1 proposes a building material erection device that can erect building materials using a single crane. Specifically, the device includes a first support member having one end rotatably fixed to a fixed member, a second support member having one end rotatably connected to the other end of the first support member and the other end movable horizontally, and a mounting stand provided along the top of the second support member, and with building materials placed on the mounting stand, the upper part of the mounting stand is lifted up, and the second support member is rotated around the other end to erect the building materials. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-24776 Summary of the Invention [Problem to be solved by the invention]

[0005] The building material erection device described in Patent Document 1 can erect building materials using a single crane, but it requires a process of unloading the building materials from a transport vehicle such as a trailer and then temporarily placing the unloaded building materials on a mounting stand, making it difficult to achieve efficient erection work. In addition, since a large horizontal force acts on one end of the first support member, which serves as the pivot point, when the structure is erected, it is necessary to construct the pivot point of the first support member as a large-scale fixed structure relative to the foundation, etc., which poses the issue of potentially increasing construction costs and lengthening the construction period. Furthermore, since the pivot point of the first support member is fixed to the foundation or the like using such a large-scale fixed structure, the erection device cannot be easily replaced, and the construction work to remove the first support member from the foundation or the like is also large-scale and takes time.

[0006] The present invention provides a tower body construction method that can efficiently unload and erect a tower body without requiring large-scale equipment and its installation work. ConstructionThe purpose of this invention is to provide a method for waking up a person. [Means for solving the problem]

[0007] In order to achieve the above object, one aspect of the tower body erection device according to the present invention is to a pair of support structures arranged at a distance such that a transport vehicle carrying the tower body can enter, each support structure having a leg member and a support member supported by the leg member; A rotating shaft is provided at one end of the tower body, and the rotating shaft is transferred from the transport vehicle to the receiving material, and the tower body is erected while the rotating shaft rotates on the receiving material.

[0008] According to this aspect, the pivot shaft provided at one end of the tower body is transferred to a pair of support structure support members arranged at a distance sufficient for a transport vehicle carrying the tower body to enter, and the tower body is erected while the pivot shaft rotates on the support member, thereby realizing efficient unloading and erection of the tower body without requiring large-scale equipment or its installation construction. Here, the pivot shaft itself is fixed without rotating relative to the tower body, and when the upper end of the tower body is erected, for example, the pivot shaft may be structured to rotate on the support member in synchronization with the tower body or to rotate relative to the tower body, as long as it moves smoothly on the bearing. In addition, since the support structure that erects the tower body has a paired configuration (is separated into two), each support structure can be made as compact as possible, which improves transportability and ease of installation. Furthermore, since the support structure is self-supporting using legs, there is no need to firmly connect it to a foundation (e.g., a reinforced concrete foundation) at the installation location of the tower body, and installation and re-installation can be carried out quickly and in a short time.

[0009] Since the tower body is erected while rotating on the support material around a pivot axis provided at one end (lower end), it is sufficient to lift the other end (upper end) of the tower body with one crane. Therefore, there is no need to keep two cranes on hand as in the conventional erection method, and the space required for that is also not required, so the tower body can be erected in a narrow construction space.

[0010] Another aspect of the tower body erection device according to the present invention is The receiving member has a curved surface member that is convex downward, and the rotation axis moves on the curved surface member.

[0011] According to this aspect, the rotation shaft moves (or slides) on the downwardly convex curved surface member of the support member, allowing the rotation shaft to rotate smoothly and move (or slide) to the bottom of the curved surface member, thereby enabling the tower body to be erected quickly and stably. Furthermore, after the tower body is erected vertically, a crane can lift the tower body in a vertical position upward and release the rotation shaft from the curved surface member, allowing for smooth release. Furthermore, when the crane rotates to erect the tower body, the tower body being erected attempts to rotate horizontally around a vertical axis centered on the rotation shaft. Due to this horizontal rotation, when the rotation shaft of one of the pair of support members shifts forward, the rotation shaft of the other support member shifts backward in the opposite direction. Even in such cases, because the support material is a curved material with a convex surface downward, gravity acting on the tower body and the pivot shaft causes the pivot shaft to return to the bottom of both support materials, making it possible to quickly eliminate any misalignment caused by the horizontal rotation of the pivot shaft. Furthermore, according to this aspect, when erecting (hoisting the crane or raising the boom), the tower body receives a restoring force in a vertical line relative to the suspension point, so the pivot shaft moves (or slides) on the downwardly convex curved surface material of the support material. This makes it easier to erect the tower body, and has the effect of reducing the horizontal force generated when erecting. Furthermore, according to this embodiment, since the curved surface material of the receiving material is curved, the movement of the pivot axis due to the above-mentioned restoring force can be limited to an extent that allows the crane operator to operate it, making it possible to prevent violent collisions with legs and other members that form the support structure.

[0012] Another aspect of the tower body erection device according to the present invention is The radius of curvature of the curved surface material is larger than the radius of the rotation shaft.

[0013] According to this aspect, the radius of curvature of the curved surface member of the support member is larger than the radius of the pivot shaft, so that when the tower body is erected, the pivot shaft is allowed to swing and move horizontally while rotating inside the curved surface member. As a result, the curved surface member does not restrict the pivot shaft, there is no risk of the curved surface member coming off the pivot shaft, and the tower body can be erected while the center of gravity of the pivot shaft (the center of gravity of the tower body located above the pivot shaft) is always moving to the bottom of the curved surface member.

[0014] In another aspect of the tower body erection device according to the present invention, The support member is attached to the leg member via a jack, The support member rises and falls up and down relative to the leg member as the jack extends and contracts in the vertical direction.

[0015] According to this embodiment, the receiving material rises and falls due to the vertical extension and contraction of the jack (vertical stroke of the rod), and by jacking up the jack, the tower body can be smoothly lifted off the ground (detached) from the transport vehicle, eliminating the problem of needing multiple heavy machinery (cranes, etc.).

[0016] In another aspect of the tower body erection device according to the present invention, The present invention is characterized in that a low-friction material is provided on the surface of the receiving member or the surface of the rotating shaft.

[0017] According to this aspect, by providing a low-friction material on the surface of the support material or the surface of the rotating shaft, it is possible to eliminate the frictional force between the support material and the rotating shaft when erecting the tower body, which inhibits smooth rotation, swinging, horizontal movement, etc. of the rotating shaft.

[0018] Another aspect of the tower body erection device according to the present invention is A counterweight is attached to the leg member.

[0019] According to this aspect, the support structure, which is not fixed to the foundation on which the tower body is installed but is merely placed on the foundation, can be prevented from sliding due to horizontal forces acting during erection, etc., by the counterweight.

[0020] In another aspect of the tower body erection device according to the present invention, a mounting flange having a first bolt hole is provided at one end of the tower body; the rotating shaft is provided with a mounting flange that is brought into direct or indirect contact with the mounting flange, The mounting flange is characterized in that a plurality of second bolt holes corresponding to the first bolt holes of the mounting flanges of a plurality of tower bodies having different diameters are provided.

[0021] According to this aspect, an attachment flange having a first bolt hole is provided at one end of the tower body, an attachment flange that abuts directly or indirectly against the attachment flange is provided on the rotating shaft, and the attachment flange is provided with a plurality of second bolt holes that correspond to the first bolt holes of the attachment flanges of a plurality of tower bodies with different diameters, so that a common (single) rotating shaft can be reused when erecting a plurality of tower bodies with different diameters. Here, "a mounting flange is provided on the rotating shaft that directly or indirectly abuts against the mounting flange" means that it includes both a configuration in which a mounting flange that directly abuts against the mounting flange is provided on the rotating shaft, and a configuration in which a mounting jig is attached to the mounting flange and a mounting flange that is attached to this mounting jig is provided on the rotating shaft (thus a mounting flange that indirectly abuts against the mounting flange is provided).

[0022] For example, the tower of a power-generating wind turbine is a cylindrical body made of steel whose cross section gradually decreases as it goes upward, and the tower is divided into multiple sections, each of which has mounting flanges at its upper and lower ends.The mounting flange at the upper end of the lower tower section and the mounting flange at the lower end of the upper tower section are abutted against each other, and bolts are inserted into the corresponding first bolt holes on both sections to join the tower sections together. When erecting the tower body, the pivot shaft can be temporarily fixed to one end of the tower body by directly or indirectly bolting the attached flange fixed to the pivot shaft to the mounting flange at one end (lower end) of the tower body. This attached flange is provided with second bolt holes that correspond to first bolt holes in the mounting flanges at one end of multiple tower bodies with different diameters, so that one pivot shaft (or a pivot shaft unit consisting of one pivot shaft and attached flange) can be reused when erecting multiple tower bodies.

[0023] Here, since the mounting flange is fixed to one side of the pivoting shaft, when the pivoting shaft unit consisting of the pivoting shaft and the mounting flange is lifted by a crane and transported to the installation location, the center of gravity of the pivoting shaft unit is on the mounting flange side, which may cause the pivoting shaft unit to rotate, resulting in a loss of a stable hanging position in the air. Therefore, by fixing a counterweight of approximately the same weight as the flange to the rotating shaft on the side opposite the flange to which it is attached, it is possible to ensure that the rotating shaft maintains a stable posture when it is suspended.

[0024] Further, one aspect of the tower erection method according to the present invention is to A tower erection method comprising the steps of: A transport vehicle carrying the tower body is driven into a space between a pair of support structures each having a leg member and a support member supported by the leg member; The method is characterized in that the rotating shaft provided at one end of the tower body is transferred from the transport vehicle to the receiving material, and the tower body is erected while rotating the rotating shaft on the receiving material.

[0025] According to this aspect, the pivot shaft provided at one end of the tower body is transferred to a pair of support structure support members arranged at a distance sufficient for the transport vehicle carrying the tower body to enter, and the tower body is erected while rotating the pivot shaft on the support member, thereby achieving efficient unloading and erection of the tower body without the need for large-scale equipment or its installation and construction.

[0026] Another aspect of the tower erection method according to the present invention is to A wire hanging down from a heavy machine is attached to the other end of the tower body, The lifting up of the wire, the rotation of the heavy machine at a predetermined angle, and the raising and lowering of the boom by a predetermined length are regarded as one set of erection steps, and by executing a plurality of sets of the erection steps, the tower is erected using the pivot shaft at one end of the tower body as a pivot point, A threshold value for the horizontal load acting from the tower body during the erection is set in advance, and the tower body is erected so that the horizontal load is equal to or less than the threshold value.

[0027] According to this aspect, when the tower body is gradually raised while performing multiple sets of raising steps, each set consisting of a wire hoisting, a rotation of the heavy equipment by a predetermined angle (e.g., a rotation of the crane's rotating body by a predetermined angle), and a boom hoisting by a predetermined length, the raising steps are performed so that the horizontal load acting from the tower body is below a predetermined threshold, thereby preventing excessive horizontal force from acting on the crane, hindering the crane's stable posture, and causing an accident such as the crane tipping over. In particular, since horizontal load (horizontal force) is likely to be generated when the wire is hoisted, the generated horizontal load can be reduced, for example, by shortening the set of raising steps (e.g., by reducing the amount of wire hoisting, the crane's rotation angle, and the amount of boom hoisting). For example, a wireless inclinometer may be installed on the hook block of the heavy equipment, and a threshold value for the tilt angle may be set so as to correlate with the threshold value for the horizontal load. When the tilt angle measured by the inclinometer exceeds the threshold value for the tilt angle, the application of an excessive horizontal load may be detected in real time. [Effects of the Invention]

[0028] Tower body of the present invention Construction The erection method makes it possible to efficiently unload and erect the tower body without requiring large-scale equipment or its installation work. [Brief explanation of the drawings]

[0029] [Figure 1A] 1 is a side view of an example of a power-generating wind turbine equipped with a tower body constructed by an erection method according to an embodiment. FIG. [Figure 1B] 1B is a view taken in the direction of the arrow b in FIG. 1A, and is a front view of an example of a power-generating wind turbine. [Figure 2] FIG. 1 is a plan view of an example of an erection device according to an embodiment. [Figure 3] 3 is a view taken along the arrows III-III in FIG. 2, and is a front view of an example of an erection device according to an embodiment. FIG. [Figure 4]4 is a view taken in the direction of an arrow IV in FIG. 2, and is a side view of an example of an erection device according to an embodiment. [Figure 5A] FIG. 5 is an enlarged view of a portion V in FIG. [Figure 5B] FIG. 5B is a view taken in the direction of the arrow b in FIG. 5A. [Figure 6] FIG. 10 is a plan view showing an example of the relative positions of the erection device, heavy machinery, and tower body transported by a transport vehicle when carrying out the erection method. [Figure 7] FIG. 1 is a process diagram of an example of a tower erection method according to an embodiment. [Figure 8] 8(a) is a process diagram of an example of a tower erection method according to the embodiment, following FIG. 7, and FIG. 8(b) is an enlarged view of part b in FIG. 8(a). [Figure 9] 9(a) is a process diagram of an example of a tower erection method according to the embodiment, following FIG. 8, and FIG. 9(b) is an enlarged view of part b in FIG. 9(a). [Figure 10] 10(a) is a process diagram of an example of a tower erection method according to the embodiment, following FIG. 9, and FIG. 10(b) is an enlarged view of part b in FIG. 10(a). [Figure 11] FIG. 10 is a perspective view showing an example of a unit including a rotation shaft and a mounting flange. [Figure 12] 12(a) is a process diagram of an example of a tower erection method according to the embodiment, following FIG. 10, and FIG. 12(b) is an enlarged view of part b in FIG. 12(a). [Figure 13] 13(a) is a process diagram of an example of a tower erection method according to an embodiment, following FIG. 12, and FIG. 13(b) is an enlarged view of part b in FIG. 13(a). [Figure 14A] 13, is a process diagram of an example of a tower erection method according to the embodiment. [Figure 14B] 14B is a process diagram of an example of a tower erection method according to an embodiment, following FIG. 14A. [Figure 15] FIG. 10 is a schematic diagram illustrating the trajectory of the boom tip of the heavy equipment during the erection process. [Figure 16]14B, (a), (b), and (c) are process diagrams of an example of a tower erection method according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0030] Hereinafter, a tower erection device and an erection method according to an embodiment will be described with reference to the accompanying drawings. In this specification and the drawings, substantially identical components are designated by the same reference numerals, and redundant explanations may be omitted.

[0031] [Tower body erection device and erection method according to the embodiment] An example of a tower erection device and an erection method according to an embodiment will be described with reference to Figures 1 to 16. Here, Figure 1A is a side view of an example of a power-generating wind turbine equipped with a tower constructed using the erection method according to an embodiment, and Figure 1B is a front view of the example of the power-generating wind turbine as seen in the direction of arrow b in Figure 1A.

[0032] 1A and 1B, the tower-like structure to be erected and constructed in the illustrated example is a power-generating wind turbine WM that constitutes a wind power generation system. The erection method according to the embodiment can be applied to erecting various tower-like structures other than the power-generating wind turbine WM.

[0033] The power-generating wind turbine WM has a hollow tower TW, a nacelle N mounted on the top of the tower TW, and multiple blades BL attached to the sides of the nacelle N. The legs of the tower TW are supported by a reinforced concrete foundation K, and (most or all of) the foundation K is buried in the ground. Here, the foundation K in the illustrated example is a spread foundation, but it may also be supported by piles such as cast-in-place piles or precast piles.

[0034] The tower TW is made of steel and is formed by a plurality of cylindrical tower bodies T1 to T3 whose cross section gradually decreases upward, and a flange (mounting flange) (not shown) is provided at the end of each tower body T, and both mounting flanges are abutted against each other and bolts are inserted into bolt holes (first bolt holes) (not shown) at corresponding positions on both mounting flanges to join them. The tower TW in the illustrated example is a tower of a predetermined length, with three tower bodies T1 to T3 stacked vertically.

[0035] The nacelle N is a device that generates electricity by utilizing the rotation of the blades BL, and the casing C that forms the nacelle N extends in the direction of the rotation axis of the blades BL, and houses inside it a power rotating shaft to which the blades BL are fixed, a speed increaser, a brake device, and a generator (none of which are shown). Here, the brake device is a device that stops the rotation of the power rotating shaft, for example, during maintenance.

[0036] A plurality of blades BL (for example, three blades at 120 degree intervals) are provided on a hub H provided at the front of the nacelle N, and are arranged radially from the hub H as the center.

[0037] The erection device 100 and the erection method using this erection device 100, which are applied when erecting the tower body T that constitutes the tower TW, will be described below.

[0038] First, an example of a raising device according to an embodiment will be described with reference to Figures 2 to 5. Here, Figure 2 is a plan view of an example of a raising device according to an embodiment, Figure 3 is a view taken along arrows III-III in Figure 2 and is a front view of an example of a raising device according to an embodiment, and Figure 4 is a view taken along arrow IV in Figure 2 and is a side view of an example of a raising device according to an embodiment. Also, Figure 5A is an enlarged view of part V in Figure 4, and Figure 5B is a view taken along arrow b in Figure 5A.

[0039] The erection device 100 has a pair of support structures 50, and when carrying out the tower erection method, they are installed in the construction area with a distance t therebetween as shown in the figure. As will be explained below, this distance t is set to the width at which a transport vehicle carrying the tower body T on its loading platform can enter in the X1 direction. More specifically, it is the width at which one end of the tower body T loaded on the loading platform can enter with ease.

[0040] The support structure 50 includes leg members 10 and support members 20 supported by the leg members 10. The leg members 10 are constructed by assembling a plurality of horizontal members 11, vertical members 12, and diagonal members 13 into a frame shape, and each member is made of shaped steel such as channel steel and angle steel, H-shaped steel, flat steel, etc.

[0041] The support member 20 has a support frame 21 and a downwardly convex curved surface member 22 supported by the support frame 21. Like the individual components that make up the leg member 10, the support frame 21 is also constructed by assembling a plurality of shaped steel members such as channel steel and angle steel, H-shaped steel, flat steel, etc. into a frame shape.

[0042] 5A, curved surface material 22 is formed by bending flat steel so as to form a predetermined radius of curvature R, and low-friction material 25 is attached to the surface of curved surface material 22. This low-friction material 25 can be a fluororesin sheet such as PTFE (polytetrafluorethylene), or a tin plate.

[0043] 5A, the radius of curvature R of the curved surface member 22 is set to be larger than the radius r of the rotation shaft 60 attached to one end of the tower body T. With this configuration, during the process of erecting the tower body T, the rotation shaft 60 is allowed to rotate in the X2 direction inside the curved surface member 22 while swinging in the X3 direction and moving horizontally.

[0044] The support member 20 is attached to the leg member 10 via a plurality of jacks 30 (two in the illustrated example) such as hydraulic jacks. The jacks 30 extend and retract in the X4 direction, which is the vertical direction, and the extension and contraction of the jacks 30 causes the support member 20 to rise and fall up and down relative to the leg member 10.

[0045] For example, by jacking up the jack 30, the tower body T can be smoothly lifted from the transport vehicle to the ground, eliminating the need for multiple heavy machines (cranes, etc.).

[0046] Furthermore, a counterweight 40 of a predetermined weight is mounted on, for example, the cross member 11 of the leg member 10. The counterweight 40 is formed of, for example, a concrete block or the like.

[0047] The manufacturing cost of the support structure 50 is low because each of the components constituting the leg member 10 and the support member 20 is formed from general earth retaining materials such as shaped steel and flat steel.

[0048] Furthermore, since the erection device 100 is formed by a pair of support structures 50 that are separated from each other, and each support structure 50 only needs to be placed in the construction area, the erection device 100 is extremely compact, and its transportation and installation are extremely easy.

[0049] Here, in order to ensure the integrity of the pair of support structures 50, the pair of support structures 50 disposed at a distance t from each other may be connected by a plurality of connecting members (not shown).

[0050] Furthermore, when erecting the tower body T, a horizontal force acts on each support structure 50, and there is a risk that a support structure 50 that is simply placed on the construction area may slide due to the horizontal force, but the support structure 50 is provided with a counterweight 40 of a predetermined weight, which prevents the support structure 50 from sliding. In other words, the weight of the counterweight 40 is set to a weight that can prevent the support structure 50 from sliding against the horizontal force acting on the support structure 50 when erecting the tower body T.

[0051] Here, if there is no risk of the support structure 50 sliding even without the counterweight 40, the counterweight 40 can be omitted.

[0052] Furthermore, according to the erection device 100, when erecting the tower body T, the pivot shaft 60 attached to the lower end of the tower body T rotates on the downwardly convex curved surface member 22 of the support member 20, thereby realizing smooth rotation of the pivot shaft 60, which makes it possible to erect the tower body T smoothly and stably.

[0053] Furthermore, by providing the low-friction material 25 on the curved surface member 22 of the receiving member 20, it is possible to eliminate the inhibition of smooth rotation, swinging, horizontal movement, etc. of the rotating shaft 60 due to the frictional force between the curved surface member 22 and the rotating shaft 60 when erecting the tower body T. Here, the low-friction material may be attached around the rotating shaft 60, or may be attached to both the curved surface member 22 and the rotating shaft 60.

[0054] The erection device 100 is basically composed of a pair of support structures 50, but also includes a rotating shaft 60 attached to the leg of the tower body T as a component of the device.

[0055] Next, an example of an erection method according to the embodiment will be described with reference to Figs. 6 to 16. Here, Fig. 6 is a plan view showing an example of the relative positions of the erection device, heavy machinery, and tower body transported by a transport vehicle when carrying out the erection method. Also, Figs. 7 to 10 and Figs. 12 to 16 are process diagrams of an example of a tower body erection method according to the embodiment, respectively. Furthermore, Fig. 11 is a perspective view showing an example of a unit of a rotating shaft and a mounting flange. In Figs. 8 to 10, 12, and 13, (b) is an enlarged view of part b in (a).

[0056] As shown in Figure 6, multiple iron plates PL are laid in the construction area of ​​the tower body T, and an erection device 100 formed by a pair of support structures 50 is placed on either side of the installation position of the tower body T.

[0057] A number of iron plates PL are also laid on the route along which the trailer D, which is a transport vehicle, accesses the erection device 100, and the trailer D, with the tower body T loaded on its loading platform RD, backs up and positions one end Ta (lower end) of the tower body T in the space t between the pair of support structures 50.

[0058] A crane M (an example of heavy machinery) is parked next to the trailer D, which uses a wire to lift the other end Tb (top end) of the tower body T when erecting the tower body T.

[0059] In the erection method according to the embodiment, first, as shown in FIG. 7, the trailer D with the tower body T mounted on the loading platform RD is backed up in the Z1 direction toward the erection device 100 at the rear.

[0060] Next, as shown in Figures 8(a) and 8(b), the trailer D is stopped before one end Ta of the tower body T is positioned at the distance t between the pair of support structures 50, and the mounting jig J, which has been transported suspended by the wire W of the crane M, is attached to the mounting flange F on one end Ta of the tower body T.

[0061] More specifically, a plurality of first bolt holes Fa are opened in the mounting flange F at one end Ta of the tower body T, and the worker L aligns each bolt hole of the mounting jig J with the corresponding first bolt hole Fa and inserts a bolt B to bolt the two together. This mounting jig J is bolted to two regions of the one end Ta of the tower body T that correspond to the pair of support structures 50, respectively.

[0062] Next, as shown in FIGS. 9(a) and 9(b), the trailer D is further backed backward in the Z2 direction until one end Ta of the tower body T is positioned at the space t between the pair of support structures 50.

[0063] Next, as shown in FIGS. 10(a) and 10(b), the worker L attaches the rotary shaft 60 to the attachment jig J attached to one end Ta of the tower body T.

[0064] More specifically, a rotating shaft unit 75 as shown in Fig. 11 is transported by a crane D, and the rotating shaft unit 75 is attached to an attachment jig J. The rotating shaft unit 75 is manufactured by inserting the rotating shaft 60 into a plurality of (three in the illustrated example) through-ribs 71 of two attached flanges 70, which are bolted to the two attachment jigs J, and then welding the rotating shaft 60 and each through-rib 71 to each other.

[0065] Each of the two mounting flanges 70 has multiple sets (four sets in the illustrated example) of second bolt holes 72. Note that second bolt holes 72 are also formed on the inner side of the mounting flange 70, which is not visible, so that a total of four sets (eight) of second bolt holes 72 are formed.

[0066] Since each mounting flange 70 has four sets of second bolt holes 72, four types of spacing are formed between the second bolt holes 72 on the inside of each mounting flange 70, starting with spacing φ1 and then spacings φ2 to φ4.

[0067] A counterweight 73 made of flat steel is welded to the rotating shaft 60 on the side opposite to the mounting flanges 70 in the region between the two mounting flanges 70 .

[0068] In this way, the rotary shaft 60, the pair of mounting flanges 70, and the counterweight 73 therebetween form a rotary shaft unit 75.

[0069] When the rotating shaft unit 75 is suspended by the wire W and transported, the mounting flange 70 is attached to one side of the rotating shaft 60, which causes the center of gravity of the entire unit to shift toward the mounting flange 70, making the suspended posture unstable (for example, rotation of the rotating shaft 60). In order to prevent this, a counterweight 73 having a weight approximately equal to that of the two mounting flanges 70 is attached to the rotating shaft 60. Because the rotating shaft unit 75 is provided with the counterweight 73, the entire unit is suspended by the wire W and transported in a stable posture.

[0070] As shown in Figure 1A, the tower TW is formed by three tower bodies T1 to T3, and the diameters of the lower ends of the tower bodies T1 to T3 are different from each other. For example, in the example shown in Figure 1A, the diameter of the mounting flange at the lower end of tower body T1 is φ3, the diameter of the mounting flange at the lower end of tower body T2 is φ2, and the diameter of the mounting flange at the lower end of tower body T3 is φ1.

[0071] As shown in Figure 11, the second bolt holes 72 are spaced apart to correspond to the diameters φ1 to φ3 of the various mounting flanges, so that when erecting each of the tower bodies T1 to T3, the pivot shaft unit 75 shown in Figure 11 can be reused and attached to one end Ta (lower end) of each of the tower bodies T1 to T3.

[0072] In the illustrated example, the mounting jig J is bolted to the mounting flange F at the lower end Ta of the tower body T, and the mounted flange 70 that constitutes the pivot shaft unit 75 is bolted to this mounting jig J (thus, the mounted flange 70 is indirectly bolted to the mounting flange F), but a method may also be applied in which the mounting jig J is not used, and the second bolt hole 72 of the mounted flange 70 is aligned with the first bolt hole Fa of the mounting flange F, and then bolted (thus, the mounted flange 70 is directly bolted to the mounting flange F).

[0073] Next, as shown in FIGS. 12(a) and 12(b), the trailer D is backed slightly backward in the Z3 direction, and the rotation shaft 60 is aligned with the center position of the curved panel 22.

[0074] Next, as shown in Figures 13(a) and 13(b), a wire W hanging down from a crane is hung on the other end Tb (upper end) of the tower body T, and the jack 30 of the erection device 100 is jacked up in the Z5 direction to bring the rotation shaft 60 into contact with the curved surface material 22. That is, in Figure 13(a), the lower end Ta and upper end Tb of the tower body T are supported by the curved surface material 22 and the wire W, respectively.

[0075] In this way, by supporting the lower end Ta and upper end Tb of the tower body T with the curved surface material 22 and the wire W, respectively, the tower body T can be lifted off the ground from the loading platform RD of the trailer D, and the trailer D can be evacuated in the Z4 direction away from the tower body T.

[0076] After the trailer D is moved away from the tower body T, the upper end Tb of the tower body T is lifted in the Y1 direction by wiring with the crane M, and the tower body T is erected, as shown in Figure 14A.

[0077] When erecting this tower body T, as shown in Figure 14B, the pivot axis 60 attached to the lower end Ta of the tower body T serves as a pivot point for rotation by the curved surface member 22 of the erection device 100, so that the tower body T is erected smoothly in the Y2 direction around the pivot axis 60 at the lower end.

[0078] As shown in Figure 15, the tower body T is gradually erected by repeatedly executing multiple sets of erection steps, each set consisting of winding up a predetermined length of wire W, rotating the rotating body of the crane M at a predetermined angle, and raising and lowering the boom by a predetermined length.

[0079] In Figure 15, point P indicates the tip of the boom, and a predetermined length of wire W is wound up at point P. The winding up of the predetermined length of wire W, the rotation of the rotating body of the crane M shown by the solid line through a predetermined angle, and the raising and lowering of the boom shown by the dotted line by a predetermined length are sequentially carried out along the trajectory shown in the Y3 direction.

[0080] During the process of erecting the tower body T, the rotating shaft 60 attached to the lower end Ta of the tower body T rotates on the curved surface member 22, while oscillating and moving horizontally in the Y4 direction on the surface of the curved surface member 22. However, since the rotating shaft 60 is housed inside the curved surface member 22 with a curvature radius R that is larger than the radius r of the rotating shaft 60, the rotating shaft 60 can continue to rotate inside the curved surface member 22 without coming off the curved surface member 22.

[0081] Furthermore, even if the pivot shaft 60 moves or rotates horizontally, the pivot shaft 60 always moves (slides) so as to be returned to the lower end of the curved surface material 22 with the curvature radius R, thereby ensuring stable rotation of the pivot shaft 60.

[0082] In addition, by providing a low-friction material 25 on the surface of the curved surface material 22, the friction force between the two when the rotating shaft 60 slides on the curved surface material 22 is suppressed, ensuring smooth rotation of the rotating shaft 60.

[0083] Here, when erecting the tower body T, it is desirable to set a threshold value for the horizontal load acting from the tower body T in advance, and to erect the tower body T so that the horizontal load is below the threshold value.

[0084] For example, when erecting a tower body, a horizontal force (horizontal load) may act on the erection device 100 and the crane M. In order to prevent problems such as excessive horizontal force acting on the crane and disturbing the stable posture of the crane, threshold values ​​are set for the horizontal force that disturbs the stable posture of the crane.

[0085] Since there is a geometric correlation (one-to-one relationship) between the horizontal force acting on the crane M and the inclination angle of the wire W hanging from the crane M, for example, a wireless inclinometer that measures the inclination angle of the wire W can be installed on the hook block of the crane M, and the current inclination angle of the wire W transmitted from the wireless inclinometer, the horizontal force corresponding to the inclination angle, and even a threshold value for the horizontal force can be displayed on a device carried by the construction manager (smartphone, tablet, etc.), allowing the construction manager to perform work to erect the tower body T while checking the safety of the crane M in real time.

[0086] According to the inventors, it has been determined that horizontal forces increase when the tower body T approaches a vertical position (nearly 90 degrees from the horizontal plane), and therefore stricter construction management is required in the latter half of the erection process. However, in the erection method shown in the figure, the tower body T is erected while the pivot shaft 60 attached to the lower end Ta of the tower body T rotates inside the curved surface member 22 provided on the erection device 100, thereby mitigating any horizontal forces that may occur. Note that, since the above-mentioned horizontal forces are likely to occur when the wire is being hoisted during the erection of the tower body, for example, the horizontal forces that occur can be reduced by shortening the set of erection steps described above, more specifically, by reducing the amount of wire hoisted, the crane swing angle, and the amount of boom elevation.

[0087] After the tower body T is placed in a vertical position as shown in Figure 16(a), the tower body T is lifted upward in the Y5 direction using a crane M as shown in Figure 16(b), and the erection device 100 is removed from the installation location of the tower body T.

[0088] Next, as shown in Figure 16(c), a temporary stand G is installed at the installation location of the tower body T, the tower body T is hung down in the Y6 direction and temporarily placed on the temporary stand G, and the rotating shaft unit 75 is removed from the lower end Ta of the tower body T and recovered.

[0089] If the tower body T in the illustrated example is the lowest tower body T1 shown in Figure 1, the mounting flange at its bottom end is fixed to the foundation K with anchor bolts, etc. On the other hand, if the tower body T is a middle or upper tower body T2 or T3, the mounting flange at its bottom end is bolted to the mounting flange at the top end of the tower body in the lower tier.

[0090] According to the erection method using the erection device 100 shown in the figure, it is possible to efficiently unload and erect the tower body T from the trailer D without requiring large-scale equipment or its installation work.

[0091] It should be noted that the present invention is not limited to the configurations shown here, and other embodiments may be possible in which other components are combined with the configurations described in the above embodiments. In this regard, the present invention can be modified within the scope of the present invention, and can be appropriately determined depending on the application form. [Explanation of symbols]

[0092] 10: Leg material 11: Horizontal material 12:Vertical member 13: Diagonal material 14: Jack stand 20: Support material 21: Support structure 22: Curved surface material 25: Low friction material 30: Jack 40: Counterweight 50: Support structure 60: Rotating axis 70: Mounting flange 71:Through rib 72: Second bolt hole 73: Counterweight 75: Rotating axis unit 100: Erection device (tower body erection device) WM: Power generating wind turbine N: Nacelle C: Casing H: Hub BL: Blade TW: Tower T,T1,T2,T3: Tower body Ta: One end (lower end) Tb: Other end (top end) F: Mounting flange Fa: First bolt hole J: Mounting jig B: Bolt K: Basics R: radius of curvature r: radius M: Heavy machinery (crane) D: Transport vehicle (trailer) RD: Cargo bed PL: Iron plate L:Worker W: Wire

Claims

1. A tower erection method comprising the steps of: A transport vehicle carrying the tower body is driven into a space between a pair of support structures each having a leg member and a support member supported by the leg member; A method for erecting a tower body, characterized in that a rotating shaft provided at one end of the tower body is transferred from the transport vehicle to the receiving material, and the tower body is erected while rotating the rotating shaft on the receiving material.

2. A wire hanging down from a heavy machine is attached to the other end of the tower body, The lifting up of the wire, the rotation of the heavy machine at a predetermined angle, and the raising and lowering of the boom by a predetermined length are regarded as one set of erection steps, and by executing a plurality of sets of the erection steps, the tower is erected using the pivot shaft at one end of the tower body as a pivot point, 2. The tower body erection method according to claim 1, characterized in that a threshold value for the horizontal load acting from the tower body during the erection is set, and the tower body is erected so that the horizontal load is equal to or less than the threshold value.

3. A method for erecting a tower body as described in claim 1, characterized in that the support material has a curved surface material that is convex downward, the radius of curvature of the curved surface material is greater than the radius of the pivot axis, and the pivot axis moves on the curved surface material.

4. The support member is attached to the leg member via a jack, 4. The tower erection method according to claim 1, wherein the support member is raised and lowered relative to the leg member by vertical extension and contraction of the jack.

5. 5. The tower erection method according to claim 1, wherein a low-friction material is provided on the surface of the support member or the surface of the rotating shaft.

6. 6. The tower erection method according to claim 1, wherein a counterweight is attached to the leg member.

7. a mounting flange having a first bolt hole is provided at one end of the tower body; the rotating shaft is provided with a mounting flange that is brought into direct or indirect contact with the mounting flange, A tower body erection method according to any one of claims 1 to 6, characterized in that the mounting flange is provided with a plurality of second bolt holes corresponding to the first bolt holes of the mounting flanges of a plurality of tower bodies having different diameters.

Images