JP6400729B2 - Defeating wind turbines for power generation - Google Patents

Description

  The present invention relates to a method for tilting a wind turbine for power generation, and more particularly to a method for tilting a wind turbine for power generation having a nacelle and a blade at an upper end portion.

  Wind power generation is attracting attention as a clean energy that can replace limited fossil fuels such as oil, and huge power generation facilities equipped with dozens of wind turbines for power generation have been built and operated in various places.

  A commonly used wind turbine for power generation is known, for example, in which a tower is fixed to a concrete foundation, and a nacelle to which a blade is attached is attached to the top of the tower. Inside the nacelle, a generator, a speed increaser, a brake device, and the like are accommodated, and a blade is fixed to a rotor shaft protruding from the speed increaser. When the blades receive wind and rotate, the speed increaser increases the rotation speed to a constant value, and the generator converts the rotational force into electric power.

  Normally, the service life of towers and blades is designed to be about 20 years. After the designed service life has elapsed, the entire foundation, tower, and blades are dismantled and a new wind turbine for power generation is installed. They are constructed (see Patent Document 1).

JP 2010-275705 A

  As explained in the background art above, the wind turbine for power generation whose service life has passed is dismantled and removed. The above-mentioned Patent Document 1 only discloses dismantling and removing from the foundation to the tower and further the blade as described above, and does not show a specific efficient dismantling method. Generally, the dismantling and removal of such a wind turbine for power generation was basically dismantled in the reverse order of the construction procedure. For example, prepare a scaffold, a crane, etc., cut off the nacelle attached with the blade from the top and lower it to the ground with a crane, etc. Finally, the foundation was dismantled. Therefore, it takes time and labor and is a complicated operation, and a simple disassembly method has been desired.

  In other words, unlike power towers and chimneys, there are no proposals for efficient overturning or dismantling because of the special configuration of heavy nacelles and blades at the top. Currently.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a method for overturning a power generation windmill that allows the power generation windmill to be disassembled in a quick and simple manner.

In order to achieve the above object, the method of defeating a wind turbine for power generation according to claim 1,
In the method of defeating the wind turbine for power generation for dismantling the wind turbine for power generation having a nacelle and a blade at the upper end of the tower,
A folding position setting step for setting a halfway height position of the tower as a folding position; and fixing one end of the string-like body to the upper end of the tower; and the string-like body in the vicinity of the folding position A string-like body attaching step that guides and attaches downward through a relay portion provided on the bending portion, and a cutting portion is partially formed on the bending direction side of the bending position and / or on the opposite side of the bending direction of the tower. A cutting step forming step to be formed, and a bending step of performing a bending operation by applying a force in the bending direction to the upper portion from the bending position of the tower while pulling the string-like body downward, The bending process is continued until the nacelle and the blade reach a predetermined low position.

  According to this method, the wind turbine for power generation can be brought down through the bending position setting process, the string attachment process, the cutting part forming process, and the bending process. That is, the troublesome work prior to defeating such as removing the nacelle or blade in advance is eliminated. In addition, the bending operation of the tower is performed by applying a force in the bending direction to the tower while pulling the string-like body fixed to the upper end of the tower and passing through the relay section downward, so that the bending speed of the tower is controlled to generate power. The windmill can be defeated safely. If the tower is bent and tilted, and the nacelle and blades reach a predetermined low position, the subsequent dismantling can be easily performed using a small crane vehicle or the like. Accordingly, the wind turbine for power generation can be easily disassembled in a short time and safely.

The method for defeating a wind turbine for power generation according to claim 2 is the method for defeating a wind turbine for power generation according to claim 1,
The installation position of the relay unit is opposite to the bending direction of the tower and is directly above the bending position.

  According to this method, since the relay portion exists immediately above the bending position, the speed of the bending operation of the tower upper part due to the pulling operation from the lower side of the string-like body becomes more accurate. That is, the string-like body does not interfere with the bending operation and can always be pulled stably from below.

The method of defeating the wind turbine for power generation according to claim 3 is the method of defeating the wind turbine for power generation according to claim 1 or 2,
The string-like body is fixed to the upper end portion of the nacelle, and the relay portion is fixed to the tower and has an insertion portion that can move without lateral displacement while the string-like body is inserted. It is characterized by having.

  According to this method, since the string-like body can be moved without lateral displacement in the insertion portion of the relay portion, the string-like body can be pulled smoothly and stably during the bending process. Can do.

The method of defeating a wind turbine for power generation according to claim 4 is the method of defeating a wind turbine for power generation according to any one of claims 1 to 3,
The bending operation by applying a force in the bending direction is performed by attaching a second string-like body to the upper end portion of the tower and pulling the second string-like body from below the bending direction. .

  According to this method, the tower can be bent by pulling the second string-like body from below in the bending direction, for example, from the ground. That is, since a bending force can be applied to the tower only by a traction operation, it is not necessary to use a large-scale device.

The method for overturning a wind turbine for power generation according to claim 5 is the method for overturning a wind turbine for power generation according to any one of claims 1 to 4,
A plurality of the bending positions are provided at different height positions, and the bending step is performed in order from the highest height position.

  According to this method, even a power generation wind turbine with a large power generation capacity and a high tower can be bent gradually by dividing it from above by providing a plurality of bending height positions and performing the bending process in order from the highest. Even a tall wind turbine for power generation can be easily and safely defeated.

The method for overturning a wind turbine for power generation according to claim 6 is the method for overturning a wind turbine for power generation according to any one of claims 1 to 5,
The bending step is performed until the nacelle and the blade reach the ground or the vicinity thereof.

  According to this method, since the nacelle and the blade are carried out until reaching or near the ground by the bending process, the subsequent dismantling work can be performed at a low position on or near the ground, and the dismantling operation is performed at a high place. The dangerous work of doing is eliminated. In particular, as described above, this is an extremely effective safety measure in the dismantling of the power generating wind turbine having a special upper structure.

The method for defeating a wind turbine for power generation according to claim 7 is the method for defeating a wind turbine for power generation according to any one of claims 1 to 5,
The bending step is characterized in that a support having a predetermined height is installed in a ground area near the tower on the bending direction side, and is performed until the nacelle and the blade are placed on the support.

  According to this method, the nacelle and the blade are lowered onto the support having a predetermined height and placed on the support by the bending process. Therefore, the height distance to be bent down can be shortened, and the bending process can be carried out in a shorter time and safely.

The method for defeating a wind turbine for power generation according to claim 8 is the method for defeating a wind turbine for power generation according to claim 7.
The support is formed by depositing earth and sand.

  By this method, since the support is formed with piles of earth and sand, the support can be easily installed at a relatively low cost, and the buffer when the nacelle and blades at the top of the tower are placed is buffered. It also has a function.

The power generating windmill according to claim 9 is the method of defeating the power generating windmill according to any one of claims 1 to 8,
A removal portion forming step of forming a removal portion within a range in which the tower can maintain a self-supporting state is included in a lowermost position on the bending direction side of the lower end portion of the tower.

  According to this method, since the removal portion is formed at the lowest position of the tower, the tower can easily tilt the lower portion in the direction. Therefore, the lowermost part of the tower can be brought down with less force in the bending process. On the other hand, since the removal portion forming step is performed within a range in which the tower can maintain a self-supporting state, the work safety is maintained.

The method of defeating a wind turbine for power generation according to claim 10 is the method of defeating a wind turbine for power generation according to claim 9.
Auxiliary means for assisting the self-supporting state of the tower is provided in a portion other than the removal portion at the bottom of the tower.

  By this method, the lowermost position portion of the tower where the removal portion is formed is assisted by the assisting means to assist the self-standing state of the tower, so that the lowermost position of the tower becomes unstable and can be prevented from collapsing due to its own weight. It will be a thing.

  According to the method for tilting a wind turbine for power generation of the present invention, the bending operation of the tower is performed by applying a force in the bending direction to the tower while pulling the string-like body fixed to the upper end of the tower and passing through the relay section downward. Therefore, the wind turbine for power generation can be brought down safely and easily by a simple method without performing complicated work prior to tipping such as removing the nacelle or blade in advance. And since a nacelle and a blade are located in a low height position, a dangerous work of performing a dismantling operation at a high place is eliminated, and the subsequent dismantling work can be easily and safely performed.

It is a figure which shows the mode of the windmill for power generation just before performing a bending process in connection with the falling method of the windmill for power generation of this invention. It is explanatory drawing of a string-like body attachment process in connection with the falling method of the windmill for electric power generation of this invention. It is explanatory drawing of a cutting part formation process in connection with the fall method of the windmill for electric power generation of this invention. It is explanatory drawing of a bending process in connection with the falling method of the windmill for electric power generation of this invention. However, it is a figure to the middle of a bending process. It is explanatory drawing of a bending process in connection with the falling method of the windmill for electric power generation of this invention. However, it is a figure immediately after finishing a bending process. It is explanatory drawing of a bending process in connection with the falling method of the windmill for electric power generation of this invention. However, it shows about the case where a bending position is set to two places and a support is installed. It is explanatory drawing of the removal part formation process in connection with the falling method of the windmill for electric power generation of this invention. It is explanatory drawing of the method related to the falling method of the windmill for electric power generation of this invention, and the method of falling a tower only by a removal part formation process.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a method for tilting a power generating windmill according to the present invention will be described in detail below with reference to the drawings.

  The method for defeating a wind turbine for power generation according to the present invention includes a bending position setting step, a string-like body attaching step, a cutting portion forming step, and a bending step. In the target wind turbine 10, a tower 16 is constructed on a foundation 100 constructed on the ground, and a nacelle 12 is attached to an upper end portion of the tower 16. The nacelle 12 accommodates a generator, a speed increaser, a brake device, and the like (not shown), and a blade 14 is fixed to a rotor shaft protruding from the speed increaser.

  In FIG. 1, in the folding position setting step, the folding position A is set in consideration of the height of the tower 16 of the wind turbine 10 for power generation, and in this embodiment, the bending position is only one place, The substantially middle height position of 16 is set as the bending position A.

  Next, a string-like body attaching step is performed, and as shown in the figure, one end of the first wire 20 as the string-like body is fixed to the nacelle 12 and guided downward. And the wire 20 is penetrated by the relay part 18, and is further guide | induced below.

  2 (a) and 2 (b) are partially enlarged views of the first wire 20 attached to the nacelle 12 and the insertion state of the relay portion 18. As shown in FIG. One end is attached to a hook 32 attached over the lower part of the nacelle 12 and the tower 16 (FIG. 1A). The hook 32 can be attached by welding or the like, for example, and one end of the first wire 20 is attached through the hook 32.

  The attachment of the first wire 20 is not limited to one attachment of one wire. For example, two wires are attached to different places, respectively, and a pulling operation described later from two directions is performed. Is also possible.

  Further, as shown in FIG. 2B, the relay portion 18 is provided with a through hole 19, and the first wire 20 is inserted into the through hole 19. As shown in the drawing, the inner wall of the through hole 19 has a shape in which the central portion is raised in a circular arc shape, and is configured so that the moving operation inside the first wire 20 is performed smoothly and without lateral deviation. .

  In addition, when providing the 1st wire 20 in two places as mentioned above, this relay part 18 will also provide two places, shifting the position of a horizontal direction.

  The attachment position of the relay portion 18 is directly above the bending position A and on the opposite side to the bending direction side. In the present embodiment, the relay portion 18 attached to the pedestal portion 38 via the arm 38a is attached by fixing the pedestal portion 38 to the tower 16 by welding or the like.

  FIG. 3 shows a state in which the cutting part forming step has been performed. In the present embodiment, the cutting part C1 is provided below the relay part 18 at the bending position A of the tower 16 and opposite to the bending direction. Is partially formed. The cutting part C <b> 1 is formed to about half the diameter at the bending position A of the tower 16. The place and quantity for forming the cutting part C1 can be determined in consideration of the height, material, etc. of the tower 16. The cutting part C1 can be easily formed using a normal electric cutter or the like.

  Further, at the bending position A, it is possible to partially form a notch C2 opened by a predetermined angle as shown by a wavy line in the drawing on the bending direction side.

  FIG. 4 shows the operation of the bending process, and shows a state in which a force is applied in the bending direction, thereby bending downward. In the present embodiment, the force in the bending direction is performed by the pulling operation of the second wire 22.

  As shown in FIG. 2, the second wire 22 that is the second string-like body is fixed to the lower side of the nacelle 12 on the side opposite to the attachment position of the first wire 20. In the present embodiment, the second wire 22 is attached to the nacelle 12 and the tower 16 and fixed to the hook 34. As described above, the fixing of the second wire 22 may be performed simultaneously with the fixing operation of the first wire 20 in the above-described string-like body attaching step.

  Next, the second wire 22 is pulled from below in the bending direction, and a force is applied in the bending direction to bend the tower 16 at the bending position A. This operation is performed while pulling the first wire 20 downward. . Here, since the installation position of the relay unit 18 is on the opposite side of the bending direction of the tower 16 and immediately above the bending position A, the upper part of the tower 16 is pulled by the pulling operation from the lower side of the first wire 20. Suppressing the speed of the bending operation becomes more accurate. That is, in addition to the pulling operation of the second wire 22 and the pulling operation thereof, the tilting operation due to its own weight can be made gentle by pulling the first wire 20 from the opposite side.

  In addition, since the relay portion 18 exists above the bent portion, the first wire 20 does not interfere with the bending operation and can always be stably pulled from below. In order to pull down the first wire 20 and the second wire 22 downward, it is possible to safely carry out while controlling the tensile strength using a device such as a winch (not shown).

  In this way, since a bending force can be applied to the tower 16 only by a traction operation, it is not necessary to use a large-scale device. Further, the application of force in the bending direction is not limited to such a wire pulling operation, but can also be performed by a pushing operation by a device or the like in the bending direction from the opposite side of the tower 16.

  Further, this bending process is continuously performed until the nacelle 12 and the blade 14 reach a predetermined low position. FIG. 5 shows a state in which the nacelle 12 has reached a predetermined low position and has finished the bending process. In the present embodiment, the process is performed until the blade 14 reaches the ground. By lowering to a low position in this way, the following work can be performed by using a small crane, heavy machinery, etc. on the ground. Further, for example, by lowering the nacelle 12 and the blade 14 to about 20 m or less, a safer disassembly work can be performed.

  For the dismantling work of the wind turbine 10 for power generation, for example, the blade 14 is first removed, the nacelle 12 is removed, and the remaining tower 16 is broken into small pieces using a small crane, a cutting tool, etc., and carried out by a truck or the like. Can do. Finally, the foundation 100 is disassembled and removed to complete the disassembly of the wind turbine 10 for power generation. Therefore, the dangerous work of performing the dismantling operation at a high place is eliminated. In particular, this is an extremely effective safety measure in the dismantling of a structure having a special upper structure such as the wind turbine 10 for power generation.

  FIG. 6 shows an example in which the height of the tower 16 is relatively high, and a plurality of bending positions A are provided (in two places A1 and A2). Further, the tower 16 has a predetermined height in the ground area on the bending direction side. An example in which a support 40 (for example, formed by depositing earth and sand) is installed is shown.

  In the present embodiment, the bending process described above is performed in order from the highest height position. For example, when the bending positions are set at two places (A1, A2), the upper portion of the tower 16 is first bent at the bending position A1 having a high height, and then the tower is bent at a bending position A2 having a low height. The bending process is performed so as to bend the intermediate portion. In this case, when the tower is bent at the first bending position A1, the cutting part C is not formed at the lower bending position A2, and the bending process is finished at the higher bending position. It is preferable to form it after a while.

  A specific bending operation is first performed until the upper portion of the tower 16 including the nacelle 12 and the blades 14 is bent by a predetermined angle at the first bending position A1. In the present embodiment, θ is bent to about 100 degrees. Next, a bending step is performed at the second bending position A2 to bend the intermediate portion of the tower 16 until the nacelle 12 and the blade 14 are placed on the support 40.

  The support 40 is formed with a predetermined height and a predetermined size by depositing earth and sand as described above. Therefore, in the case of the tower 16 having a high height, the bending work can be performed with a short operation and time. Moreover, since the upper part of the tower 16 is lowered to the height of the support 40 and is in a stable placement state, the dismantling work of the placed part is easy. Note that the height of the support 40 can be made lower than that shown in the figure, and this can be easily performed because this is performed by the sedimentation operation of the earth and sand. In addition, it is easy to collect earth and sand after work.

  Further, the support 40 formed of earth and sand absorbs the impact when the nacelle 12 and the blade 14 fall down, and the bending process can be performed safely. When the tower 16 falls while turning, even if accessories are shaken off, it can be safely accommodated by the support 40 on which the earth and sand are piled up.

  It is also possible to perform the dismantling work on the support 40. Further, a truck for transportation is placed on the support 40, and the disassembled parts, members, etc. are moved laterally and loaded on the truck for processing. It can also be easily transported to places. Here, in FIG. 6, the folding position A is set at two places and the nacelle 12 and the blade 14 are received by the support 40. However, the support 40 is not installed when it is not necessary. May be.

  FIG. 7 is an explanatory diagram of the removal portion forming step. FIG. 7A is a front view, and FIG. 7B is a cross-sectional view. A removal portion 42 is formed on the bending direction side at the lowest position 16 a of the tower 16. The removal part 42 is formed in a range in which the tower 16 can maintain a self-supporting state, that is, in a range in which the tower 16 does not cause self-destruction at the lowest position 16a.

  In this Embodiment, the removal part 42 is formed in the state which left half or more in the area of the lowest position 16a of the tower 16, and natural collapse is prevented. Further, the remaining removed portion may be hardened with concrete 44 as auxiliary means to assist the self-supporting state of the tower 16.

  FIG. 8 is an explanatory diagram of a method for depressing the tower 16 by performing the removal portion forming step. Hooks 32 and 34 are attached to the lower part of the nacelle 12 at two positions on the front and rear sides as shown in FIG. However, two wires 20-1 and 20-2 are fixed to the hook 32 on the rear side. One wire 22 for performing a tilting operation is fixed to the hook 34 on the front side.

  The tower 16 is pulled down from the lower side with the wire 22 on the front side, and the center of gravity of the tower 16 is moved little by little to the removal unit 42 side with the two wires 20-1 and 20-2 on the rear side. Then, when the center of gravity exceeds the cut-out area, the tower 16 starts to fall naturally in a direction perpendicular to the axis with the front end of the removal portion 42 as the fall axis. As a result, the tower 16 can be brought down with a relatively small force while controlling the falling direction. Since all the work can be performed on the ground after the tower 16 falls, this dismantling work can be easily and safely performed. In the present embodiment, the support 40 can also be installed.

  According to the method for tilting the wind turbine for power generation of the present embodiment, the wind turbine for power generation 10 is tilted through the bending position setting step, the string-like body attaching step, the cutting portion forming step, and the bending step. That is, the troublesome work prior to defeating such as removing the nacelle 12 and the blade 14 in advance is eliminated. Further, the bending operation of the tower 16 applies a force in the bending direction to the tower by the second wire 22 while pulling the first wire 20 fixed to the upper end of the tower 16 and passing through the relay section 18 downward. Since this is done, the speed of bending down is controlled, and the wind turbine 10 for power generation can be brought down safely in a simple manner. And since the nacelle 12 and the blade 14 are located at a low position, it can be easily and safely performed from the ground using a small crane, heavy equipment, etc., rather than a dangerous dismantling work at a high place.

  In addition, this invention is not limited to the range shown in said embodiment, A various change is possible within the range of the summary of invention. For example, a metal wire is used as the string-like body, but a flexible resin material having high tensile strength may be used. Further, as described above, the number of wires installed and the number of bent portions can be appropriately selected.

DESCRIPTION OF SYMBOLS 10 Windmill for power generation 12 Nacelle 14 Blade 16 Tower 18 Relay part 19 Through-hole (insertion part)
20 First wire 22 Second wire 24 Support 40 Support 100 Base A, A1, A2 Bending position C1, C2 Cutting part

Claims (10)

In the method of defeating the wind turbine for power generation for dismantling the wind turbine for power generation having a nacelle and a blade at the upper end of the tower,
A folding position setting step for setting a folding position for folding the height position in the middle of the tower;
A string-like body attaching step of fixing one end of the string-like body to the upper end portion of the tower and attaching the string-like body downward through a relay portion provided in the vicinity of the bending position;
A cutting part forming step of partially forming a cutting part on the bending direction side and / or the bending direction side of the bending position portion of the tower;
A bending step of pulling the string-like body downward while applying a force in the bending direction with respect to the upper portion of the tower from the bending position, and bending.
A method for tilting a wind turbine for power generation, characterized in that the bending step is continued until the nacelle and blades reach a predetermined low position. The installation position of the relay unit is
2. The method for tilting a wind turbine for power generation according to claim 1, wherein the wind turbine is on the side opposite to the bending direction of the tower and directly above the bending position. Fixing to the upper end of the string-like body is performed on a predetermined portion of the nacelle,
3. The method according to claim 1, wherein the relay portion includes an insertion portion that is fixed to the tower and is movable without lateral displacement while the string-like body is inserted. The action of bending by applying force in the bending direction is
The second string-like body is attached to the upper end of the tower, and the second string-like body is pulled from below in the bending direction to perform the operation. To defeat wind turbines for power generation. A plurality of the bending positions are provided at different height positions,
5. The method of defeating a wind turbine for power generation according to any one of 1 to 4, wherein the bending step is performed in order from a higher height position. The bending step includes
6. The method of overturning a wind turbine for power generation according to claim 1, wherein the method is performed until the nacelle and the blade reach the ground or the vicinity thereof. The bending step includes
6. A support of a predetermined height is installed in a ground area on the bending direction side near the tower, and the process is performed until the nacelle and the blade are placed on the support. The method for defeating a wind turbine for power generation according to claim 1. The support is
The method for overturning a wind turbine for power generation according to claim 7, wherein the earth and sand are piled up.   The removal part formation process which forms a removal part in the lowest part position of the said bending direction side of the lower end part of the said tower in the range which the said tower can maintain a self-supporting state is included. The method for defeating a wind turbine for power generation according to item 1.   9. The method for tilting a wind turbine for power generation according to claim 8, wherein auxiliary means for assisting the self-supporting state of the tower is provided in a portion other than the removal portion at the bottom of the tower.

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