WO2009101697A1

WO2009101697A1 - Method and apparatus for maintenance of windmill vane of wind power equipment

Info

Publication number: WO2009101697A1
Application number: PCT/JP2008/052508
Authority: WO
Inventors: Yasuhisa Sakurai
Original assignee: Sakuraigiken Co., Ltd.
Priority date: 2008-02-15
Filing date: 2008-02-15
Publication date: 2009-08-20

Abstract

[PROBLEMS] To provide a method and apparatus for maintenance of windmill vane of wind power equipment designed to carry out the repair/replacement work of existing wind power equipment with reduced working cost and working period. [MEANS FOR SOLVING PROBLEMS] The method comprises the working steps of wrapping metal bands around the outer circumferential surface of a windmill tower with no lead at two positions vertically provided with a given spacing therebetween, fixing them, detachably mounting a rack rail of given length between the resultant vertically arranged pair of fixed metal bands, moving an elevating machine for maintenance mounted on the rack rail, and repeating wrapping and fixing of metal bands and mounting of rack rails until reaching the top edge of the windmill tower; wrapping and fixing a band with reel on the top edge of the windmill tower by the use of the elevating machine for maintenance; carrying out vertical movement of a working stage for maintenance to a given position by the use of the reel of the band with reel and a winch installed on the ground; and performs repair from the distal end to the base of the windmill vane by the movement of the working stage.

Description

Maintenance method and maintenance device for wind turbine blade of wind power generation facility

In the present invention, repair work and replacement work when wind turbine blades (blades) of existing wind power generation facilities and their functional parts are damaged by aged deterioration, lightning strikes, etc. are minimized without using a large crane. The present invention relates to a maintenance method of a wind turbine blade of a wind power generation facility and a maintenance device to be performed in a construction period.

Advances in civilization and culture will inevitably be accompanied by an increase in electricity demand, but there are limits to areas suitable for hydroelectric power generation, and thermal power generation that relies on fossil fuels also has limited fuel resources, Nuclear power, which harms the natural environment, is exposed to radiation hazards.
Therefore, in recent years, there is a rapidly growing awareness of wind power generation without fear of resource waste and environmental destruction.

Since wind power generation towers are made mainly of steel, the number of maintenances such as cleaning and painting of the towers, inspection of wind turbine blades (blades), repair and the like increase with age after construction. Maintenance needs to be accessed from the outside of the wind power tower.

The access from the outside to the wind power generation tower, if the tower is assembled with steel frame, provide a guide in the steel frame, raise and lower the pedestal along the guide, repair the wind turbine blades (blades), A technique to replace is known (for example, Patent Document 1).

Japanese Patent Application Laid-Open No. 56-143369

Although wind power generation towers as wind power generation facilities built all over Japan are built on the sea, they are often installed in hilly and wild areas of remote areas. And the installation place of the wind power generation tower is maintained like a park, and it is intended to help revitalize the remote area.
For this reason, attempts have been made to change the structure of a wind power generation tower from a steel frame into a cylindrical tower to improve the appearance.

However, since the access from the outside to such a cylindrical tower has no hand on the outer peripheral surface, a large crane as used in the construction of the wind power generation tower will be transported to the site. In order to bring a large crane close to the wind power generation tower in such a place, it is necessary to secure roads and incidental work such as curing of steel plates, resulting in a lot of labor costs such as transportation and operation costs of the crane. By work such as, the garden land which was raised after a certain amount of years, built up, will be ruined, and the construction cost required for the repair restoration, loss due to the suspension of use of the garden land, etc. are hard to ignore. In addition, if the installation site of the wind power generation tower is pasture, restoration of damaged pasture for iron plate curing, compensation cost until restoration of pasture, various procedures such as temporary conversion of farmland have occurred.

Conventionally, for maintenance from the outside, it is common to hang a gondola etc. at the tip of the large crane and place the worker in it for inspection and repair, but it is very important because of its height (60 to 80 meters) It was difficult and the degree of freedom was narrow, and I could not do satisfactory work from unstable posture. Naturally, if the wind gets stronger, the gondola shakes and becomes a dangerous task, and it is forced to stop the work suddenly, the construction period was extended, and the cost was high.

The applicant of the present invention has already disclosed a repair method for repainting a large cylindrical tower such as a wind power generation tower without using a large crane in the invention of the prior application (Japanese Patent Laid-Open No. 2005-2875).

The present invention uses the repair method of the prior application invention to repair and replace large-sized wind turbine blades (blades) of existing wind power generation facilities and their functional parts etc. when damaged by aged deterioration, lightning strikes, etc. An object of the present invention is to provide a maintenance method and a maintenance device for wind turbine blades of a wind power generation facility, which can be performed with as little construction cost and work period as possible without using a crane.

In order to achieve the above object, the maintenance method of the wind turbine blade of the wind power generation facility according to claim 1 carries out the repair work of the wind turbine blade of the existing wind power generation facility and its functional parts, etc. Maintenance method and maintenance device, with metal band fixing bands releasably wound around two upper and lower points near the base end of the outer peripheral surface of the wind turbine tower without any hand-held, A rack rail of a predetermined length is removably constructed between one set of metal band fixing bands, and a maintenance elevator equipped with a drive for raising and lowering is installed and moved on the rack rails, and the metal band fixing band is again moved. And extending the rack rail upward, and sequentially adding the rack rails to the top end of the wind turbine tower, and a maintenance elevator installed on the rack rails A work process of winding and securing a lifting pulley band around the top end of a wind turbine tower, and vertically moving a maintenance work stage to a predetermined position by the pulley of the pulley band and a winch hoist installed on the ground It is characterized by including a process and a work process in which the worker on the maintenance work stage can repair from the tip to the root of the wind turbine blade by moving the maintenance work stage.

A maintenance elevator according to claim 2 is a maintenance device used for the maintenance method of the wind turbine blade of the wind power generation facility according to claim 1, the pinion meshing with the rack of the rack rail and the meshing state maintained For this purpose, there is provided a driving device for holding a rack rail in cooperation with a pinion and holding a rack rail, and connecting a motor driven by a generator to the rotation shaft of the pinion to move up and down; It is characterized by including a braking device consisting of two systems of a reduction gear and an electromagnetic brake that operates to an electrical trouble.

The maintenance work stage according to claim 3 is a maintenance device used for the maintenance method of the wind turbine blade of the wind power generation facility according to claim 1, and corresponds to the size, length, and angle of the wind turbine blade. In order to achieve this, the scaffolding plate of the working stage is characterized by comprising two small scaffolds movable so as to sandwich the wind turbine blade.

In addition, the maintenance method of the wind turbine blade of the wind power generation facility according to claim 4 is a maintenance method for performing replacement work of the wind turbine blade of the existing wind power generation facility and its functional parts, etc. A maintenance device, in which the metal band fixing band is detachably wound around and fixed to two upper and lower places near the base end on the outer peripheral surface of the wind turbine tower without any hand-held, one upper and lower metal band A rack rail of a predetermined length is detachably mounted between fixing bands, and a maintenance elevator equipped with a driving device for raising and lowering is installed and moved on the rack rails, and a metal band fixing band is wound again to be a rack rail To the top of the wind turbine tower, and using the maintenance process installed on the rack rail, the wind turbine tower is extended. On the top end of the belt, winding and securing a band with a pulley for lifting, lifting the maintenance lifting machine with the pulley of the band with a pulley and a winch hoist installed on the ground, and with the pulley of a band with a pulley and the ground A work process for vertically moving a maintenance work stage to a predetermined position by the installed winch hoisting machine, a work process for attaching a blade holder holding a wind turbine blade to a wind turbine blade by a worker on the maintenance work stage, a maintenance lifting machine And a work process for moving up and down the blade holder holding the wind turbine blades by a winch hoist installed on the ground, and the wind turbine blades damaged by removing and attaching the wind turbine blades held by the blade holder from the boss of the wind turbine tower Work process to replace the blade with a new wind turbine blade It is an butterfly.

A maintenance lifting machine according to claim 5 is a maintenance device used for a maintenance method of a wind turbine blade of a wind power generation facility according to claim 4, which is a pulley for lifting a blade holder for holding a wind turbine blade. The base end is characterized in that a boss-like fixing band wound and fixed to a wind turbine tower and a boss portion of a lifting machine are integrated and fixed by a plug-in pin.

A blade holder according to claim 6 is a maintenance device used for a maintenance method of a wind turbine blade of a wind power generation facility according to claim 4, wherein the inner side is a half groove having a phase matched to the cross section of the wind turbine blade. The clamps are symmetrically assembled, and the wind turbine blade is sandwiched and held therebetween, and a flexible hook with a rotation mechanism is attached to the left and right of the clamps. .

According to the maintenance method of the wind turbine blade of the wind power generation facility according to claim 1, the maintenance method for performing the repair work of the wind turbine blade of the existing wind power generation facility and its functional parts, etc. A maintenance device, in which the metal band fixing band is detachably wound around and fixed to two upper and lower places near the base end on the outer peripheral surface of the wind turbine tower without any hand-held, one upper and lower metal band A rack rail of a predetermined length is detachably mounted between fixing bands, and a maintenance elevator equipped with a driving device for raising and lowering is installed and moved on the rack rails, and a metal band fixing band is wound again to be a rack rail To the top of the wind turbine tower, and using the maintenance elevator installed on the rack rail, Work steps for winding and fixing a lifting band with a pull-up band on the top end, work steps for vertically moving a maintenance work stage to a predetermined position by the pulleys of a pull-up band and a winch hoist installed on the ground, and maintenance Since the workers on the maintenance work stage can repair from the tip to the root of the wind turbine blade by moving the work stage, the wind turbine blade (blade) of the existing wind power generation facility and its function are included. Repair work when parts etc. are damaged by aged deterioration, lightning strikes, etc. can be performed with as little construction cost and construction period as possible without using a large crane.

Further, according to the elevator for maintenance of the second aspect, the pinion meshed with the rack of the rack rail and the pinching roller for clamping the rack rail in cooperation with the pinion for maintaining the meshed state are provided. And a driving device for moving the motor driven by the generator to the rotating shaft of the pinion to move up and down, and a braking device consisting of two systems of a worm gear reducer for mechanical brake and an electromagnetic brake operating for electrical troubles. Therefore, it is possible to enhance the safety of lifting and lowering.

Further, according to the maintenance work stage described in claim 3, in order to correspond to the size, length, and angle of the wind turbine blade, the scaffolding plate of the work stage can be moved so as to sandwich the wind turbine blade. With two small scaffolds, it can be accessed along the outer circumference (360 degrees) of the wind turbine blade, and work can be done with stable posture, hand and feet.

Moreover, according to the maintenance method of the wind turbine blade of the wind power generation facility according to claim 4, the maintenance for performing replacement work of the wind turbine blade of the existing wind power generation facility and its functional parts, etc. A method and maintenance device, in which a metal band fixing band is detachably wound around and fixed to two upper and lower places near the base end on the outer peripheral surface of the wind turbine tower without any hand-held, A rack rail of a predetermined length is detachably mounted between metal band fixing bands, a maintenance elevator equipped with a drive for raising and lowering is installed on the rack rails and moved, and the metal band fixing band is wound again. Extend the rack rail upwards and use the maintenance process installed on the rack rail to wind up the wind using the work process of sequentially adding the rack rail to the top end of the wind turbine tower Work process of winding and fixing a band with a pulley for lifting on the top end of the tower, work process of lifting a lifting machine for maintenance by a pulley of a band with a pulley and a winch hoist installed on the ground, Pulley of a band with a pulley and the ground Work process for vertically moving the maintenance work stage to a predetermined position by a winch hoist installed in the work machine, a work process for attaching a blade holder for holding a wind turbine blade to a wind turbine blade by an operator on the maintenance work stage, The operation process of moving up and down the blade holder holding the wind turbine blade by the heavy equipment and the winch hoist installed on the ground, and the wind turbine blade held by the blade holder was detached from the boss of the wind turbine tower and damaged the wind turbine blade And a work process for replacing the wind turbine blade with a new wind turbine blade Since the wind turbine blades (blades) of the existing wind power generation equipment and their functional parts etc. are damaged by aged deterioration, lightning strikes, etc., replacement work can be done with as little construction cost and construction period as possible without using a large crane. It can be done.

According to the fifth aspect of the present invention, there is provided a maintenance lifting machine comprising a pulley for lifting a blade holder for holding a wind turbine blade, and a base end fixed to the wind turbine tower by a boss fixed band and a lifting machine. Since the boss and the pin are integrated and fixed by the insertion pin, replacement work when the wind turbine blade (blade) of the existing wind power generation facility and its functional parts are damaged by aged deterioration, lightning strike, etc., and the large crane It can be done without using it.

Further, according to the blade holder according to the sixth aspect of the present invention, a two-piece clamp having an aspect adapted to the cross section of the wind turbine blade is combined symmetrically to hold the wind turbine blade in between and hold it. The free hook with the rotation mechanism is attached to the left and right outside the attachment, so it is possible to stand the wind turbine blade that has been lifted or to hang it sideways, and also to resist wind resistance when lifted, and It is possible to compensate for the rise and fall of the lifting wire rope.

Embodiments of the present invention will be specifically described below based on the embodiments of the present invention illustrated in the attached drawings.

As shown in FIG. 8 (a), most of the wind power generation facilities 100 built all over Japan are horizontal to the upper end of the tapered cylindrical wind turbine tower 101 built on the concrete placement foundation G. It is the structure which installed the generator 103 rotationally driven by the three-blade windmill 102 of an axial propeller type, and the windmill blade 102a is removably attached to the boss | hub 102b of the windmill 102. As shown in FIG. The wind turbine blade 102a is not shown but has a variable pitch mechanism incorporated at its base end to cope with fluctuations in wind speed.

The size, length and angle of the wind turbine are different for each maker and model, and even if one wind turbine is used, the size (cross section) of the wind turbine blade 102a is as shown in FIG. The cross section of the base end portion attached to the boss 102b of the wind turbine 102 is circular, and the size of the cross section gradually decreases from the base end portion toward the tip end portion, and the wind turbine blade 102a is positioned in a suspended manner. The distance between the wind turbine blade 102a and the wind turbine tower 101 at this time is such a distance from the wind turbine tower 101 toward the tip portion of the wind turbine blade 102a.

Inside the wind turbine tower 101, a lifting device or a hoistway (not shown) is provided for carrying a person or a thing when the generator 103 is checked and repaired. However, since there is no clue about the outer peripheral surface of the wind turbine tower 101, conventionally, when repairing or replacing the wind turbine blade 102a, conventionally, a large crane is transported to the site each time, and a large-scale operation for work is performed. I was working on a bridle. To that end, as already stated, it takes a considerable amount of money for transportation and operation of the crane and construction and removal of the work rod.

Furthermore, if the area where the wind power towers are installed has been converted to leisure facilities to help promote regional development, it will take considerable time to restore the fields that were damaged by the work, and in the meantime, it will be necessary to close the park. It is also possible.

It is a repair method and repair device such as a wind power generation tower according to the applicant's prior application invention (Japanese Patent Laid-Open No. 2005-2875) developed as a substitute for the conventional method with many problems. It succeeded in attaching the rack rail used as a clue to maintenance on the peripheral face of the windmill tower 101 which has no clue. The outline of the mounting method will be described with reference to FIGS. 9 to 13.

First, as shown in FIG. 9, the metal band fixing band 105 is detachably attached to the outer peripheral surface of the wind turbine tower 101 of the wind power generation facility 100 without any clue, at two upper and lower positions near the base end. Fix with winding. Then, between the upper and lower metal

band fixing bands

105, 105, the first stage of the rack rail 106 having a predetermined length is vertically and detachably constructed. At this time, the lower end of the rack rail 106 is placed on the upper surface of the concrete placement foundation G so as to receive the entire load exerted on the rack rail 106 from above.

After the first stage rack rail 106 has been erected, a maintenance elevator 108 provided with a lifting and lowering drive device 107 is installed on the rack rail 106. Since the outer diameter of the wind turbine tower 101 is quite large, the operator on one maintenance elevator 108 installed on a single rack rail 106 depends on the width dimension of the maintenance elevator 108, but it depends on the width of the wind turbine tower 101. The metal band fixing band 105 can not be wound and fixed around the entire circumference. Therefore, the rack rails 106 are erected at four places at equal intervals on the outer peripheral surface of the wind turbine tower 101, and the maintenance elevators 108 are installed on the respective rack rails 106.

In order to facilitate the winding and fixing operation, the metal band fixing band 105 is configured such that four quarter-arc-shaped divided bands are connected in an annular shape and united at the time of the winding and fixing. Each divided band has a part of its total length as a band-like band 105A and the remaining part as a lighter wire (or chain) 105B (FIG. 10). As a metal fitting to be wound and fixed, a cargo truck clamp (lever block) 105C is used (FIG. 11). A mounting metal fitting 105D for removably attaching the rack rail 106 is provided in a protruding manner on the band-like band 105A. The wire (or chain) 105B is covered with a plastic or rubber tube 105E for protecting the outer peripheral surface of the wind turbine tower 101 (FIG. 11).

The length of one rack rail 106 is set to a fixed size of about 2 meters so that the operator in the upright posture can reach with his hand extended. A rack 106 a is provided on the outer surface of the rack rail 106 over the entire length thereof. In addition, one side of the rack rail 106 has a plug-in structure, and has a structure (not shown) in which the rack rails 106 can be sequentially connected while being joined together.

Thereafter, the four maintenance elevators 108 installed on the first stage rack rail 106 are moved by the lifting and lowering drive device 107, the metal band fixing band 105 is wound again, and the rack rail 106 is extended upward to The rack rails 106 are sequentially added to the top end of the tower 101.

The maintenance elevator 108 consists of a fan-shaped mesh plate-like scaffolding plate 108A and a safety fence 108B, and has a function that four units can move up and down independently, and when four units stop at a certain position, the scaffolding plate 108A It becomes a circular work scaffold that surrounds the wind turbine tower 101. The length (lateral width) of the arc of the scaffolding plate 108A is somewhat shorter than 1⁄4 of the circumferential length of the outer peripheral surface of the top end of the wind turbine tower 101.

By the way, the wind turbine tower 101 is formed in the shape of a conical cylinder whose outer diameter is gradually increased from its top end to its base end. Therefore, as described above, adjacent fan-shaped scaffolding plates 108A of the four maintenance elevators 108 can be annularly connected almost without a gap near the top end of the wind turbine tower 101 (FIG. 12 (a )), The gaps between the adjacent scaffolding plates 108A gradually spread as the proximal end is approached (Fig. 12 (b)).

Therefore, in order to cope with this problem, an auxiliary plate 108D for extending the arc length is provided on the lower side of the scaffold plate 108A along one of the guide rails (not shown) and one side end of the scaffold plate 108A. Therefore, it is possible to put in and out only an appropriate length (FIG. 12 (b)). Alternatively, the auxiliary plate 108D hinged to the side end of the scaffolding plate 108A may be superimposed on the scaffolding plate 108A or may be bridged to the adjacent scaffolding plate 108A.

In order to maintain the meshing state with the pinion 107A engaged with the rack 106a of the rack rail 106, the driving device 107 for raising and lowering the maintenance elevator 108 holds the rack rail 106 in cooperation with the pinion 107A. A roller 107B is provided (FIG. 13), and the rotation shaft of the pinion 107A is connected to an output shaft of a motor for rotational drive or an internal combustion engine (not shown), and the maintenance elevator 108 is moved up and down by the operation panel 108C. I am letting you go (Figure 9). The load on one elevator is less than 250 kg. A safety cover 107C is covered on the lifting and lowering drive device 107 (FIG. 9).

The braking system 110 is more secure by arranging two systems of a worm reduction gear 110A of a mechanical brake and an electromagnetic brake 110B operating to an electrical trouble (FIG. 13).
In addition, in the worst situation, equipped with a special handle that can be turned while manually turning the worm. Furthermore, a safety device (not shown) was also provided so that the elevator would not project from the end of the rail during the rail construction operation.

In this manner, a rack rail serving as a clue to maintenance can be attached to the outer peripheral surface of the wind turbine tower 101 without any clue. The total weight of the maintenance elevator 108 and the rack rail 106 is directly added to the concrete placement foundation G, and no load is applied to the wind turbine tower 101. Therefore, the elevator for maintenance 108 is an elevator (lift) that floats up in the air (elevator structural standard), and a gondola (gondola safety standard), and it is an elevator facility that is completely different. Can be greatly contributed to the shortening of the construction work.

The present invention relates to a wind power generation facility for repairing and replacing a wind turbine blade (blade) of an existing wind power generation facility and its functional parts, etc. using the rack rail when the wind turbine blade (blade) and its functional parts are damaged by aged deterioration or lightning. The present invention provides a maintenance method and a maintenance device for wind turbine blades.

First, a maintenance method for repairing with the wind turbine blade attached to the wind turbine tower 101 without removing the wind turbine blade damaged due to aged deterioration or the like will be described with reference to FIGS. 1 to 3.

As described above, the maintenance elevators 108 are respectively installed on the four rack rails 106 constructed up to the top end of the wind turbine tower 101 (FIG. 1A). The operator pulls the lifting strap band 201 up to the top end of the wind turbine tower 101 by the operators on the four maintenance elevators 108, and winds and secures the pulley band 201 on the wind turbine tower 101 (FIG. 1 (b)). One of the four maintenance elevators 108 is removed from the rack rail 106, and a maintenance work stage 401 is installed instead (FIG. 1 (c)).

As shown in FIG. 2, the pulley band 201 is installed at four locations equally divided into four parts at equal intervals to the unloading ring 201 a that is wound and fixed more strongly than the metal band fixing band 105 that spans the rack rail 106. A lifting pulley 201b is provided.

One end of a hanging wire 311 is hooked on both left and right ends of the maintenance work stage 401 via a pulley 201b, and the other end of the hanging wire 311 is wound around a winch 312 of a winch winding machine 301 installed on the ground. (Fig. 1 (c)). Further, as shown in FIG. 3A, the maintenance work stage 401 projects from the base end installed on the rack rail 106 in the direction perpendicular to the wind turbine tower 101, so that the maintenance work is performed. A safety fence 403 is attached to the top of the scaffolding plate 402 of the stage 401. The lower part of the scaffolding plate 402 is reinforced by a triangle 404.

The scaffolding plate 402 consists of two

small scaffolds

402A and 402B as shown in FIG. 3 (b), and two

small scaffolds

402A and 402B are used to correspond to the size, length and angle of the wind turbine blade. It is designed to be movable so that it can approach and leave from both sides of the wind turbine blade.

When the maintenance work stage 401 winds up the vertical support wire 311 via the pulley 201b of the band 201 with a pulley by the winch winder 301 and vertically moves it, when repairing the tip portion of the wind turbine blade 102a, The small scaffold 402B is slid toward the small scaffold 402A, and the small scaffold 402B is slid away from the small scaffold 402A as it rises to the root portion of the wind turbine blade 102a.

In this manner, the worker on the maintenance work stage 401 can move from the tip of the wind turbine blade to the root while keeping the wind turbine blade attached to the wind turbine tower 101 without removing the damaged wind turbine blade by moving the maintenance work stage 401 up and down. It becomes possible to repair.

Next, when the damage to the wind turbine blade is severe due to aged deterioration, lightning strike, etc., a maintenance method for removing the damaged wind turbine blade and replacing it with a new wind turbine blade will be described with reference to FIGS. 4 to 7.

In order to do this, it is first necessary to once remove the wind turbine blade 102a from the boss 102b attached to the tip of the rotary shaft of the wind turbine 102 and detachably connecting the wind turbine blade 102a.

As described above, maintenance elevators 108 are respectively installed on the four rack rails 106 constructed up to the top end of the wind turbine tower 101 (FIG. 4A). The operator pulls the lifting strap band 201 up to the top end of the wind turbine tower 101 by the operators on the four maintenance elevators 108, and winds and secures the pulley band 201 on the wind turbine tower 101 (FIG. 4B).

The vertical support wire 312 of the band 201 with a pulley via the pulley 201b is wound by a winch winder 301, and a maintenance lifter 501 for raising and lowering the wind turbine blade 102a is lifted, fixedly fixed and tightened to the wind turbine tower 101 It projects from a predetermined position of attachment fixed band 202 (Drawing 4 (c), Drawing 4 (d)).

After the maintenance lifter 501 has been protrusively installed on the wind turbine tower 101, the four maintenance elevators 108 are removed from the respective rack rails 106, and instead, the maintenance work stage 401 used for replacing the wind turbine blades 102a is installed. . The work of replacing the wind turbine blade 102a is performed immediately below the boss 102b which is attached to the tip of the rotation shaft of the wind turbine 102 and detachably connects the wind turbine blade 102a. Installed on the rack rail 106 installed on the

The maintenance work stage 401 is a blade holder by the operator on the maintenance work stage 401 when vertically moving the supporting wire 313 via the pulley 201b of the band 201 with a pulley by a winch winding machine 301. 601 is lifted and moved (FIG. 4 (e)), suspended by a maintenance lift 501, and the blade holder 601 is attached to the wind turbine blade 102a to hold the wind turbine blade 102a (FIG. 4 (f)).

Once the wind turbine blade 102a is held by the blade holder 601, a lifting device or a hoistway (not shown) for carrying a person or a thing is provided inside the wind turbine tower 101 when checking or repairing the generator 103. Therefore, the worker ascends to the wind turbine tower 101 using it, is attached to the tip of the rotation shaft of the wind turbine 102, and removes the damaged wind turbine blade 102a from the boss 102b that detachably connects the wind turbine blade 102a. (FIG. 4 (g)) The wound wind turbine blade 102a is lowered to the ground using the winch hoisting machine 302 (FIG. 4 (h)), and is laid on the ground under the wind turbine tower 101.

As shown in FIG. 5A, the maintenance lifting machine 501 has a pulley 501a and a wire turn 501b for lifting the blade holder 601 holding the wind turbine blade 102a by the supporting wire 314, and has a base end 501c. As shown in FIG. 5 (b), it is fitted to the boss portion 202 a of the boss fixed band 202 fixedly wound and fixed to the wind turbine tower 101, and is fixed to the wind turbine tower 101 by the insertion pin 203. .

As shown in FIG. 6, the blade holder 601 is symmetrically assembled by combining two

clamps

602A and 602B having a plane whose inner side matches the cross section of the wind turbine blade 102a, and both ends thereof are screwed with screws or the like. Structure. On the outer side of the

clamps

602A and 602B,

universal hooks

603A and 603B with a rotation mechanism are attached to either the left or the right. The

free hooks

603A and 603B are capable of standing up and lowering sideways of the wind turbine blade 102a which has been lifted, thereby compensating for wind resistance when lifting up and lifting and twisting of the lifting wire rope. It is something that can be done.
The maintenance work stage 401 has already been described, and thus the details thereof will be omitted.

Next, an operation of attaching a new wind turbine blade 102 a in place of the removed wind turbine blade 102 a will be described.

As described above, after the damaged wind turbine blade 102a is lowered to the ground using the winch hoisting machine 302 and placed on the ground under the foot of the wind turbine tower 101 (FIG. 7 (a)), the blade holder 601 is removed. . The blade holder 601 is attached to a new replacement wind turbine blade 102a that is already lying on the ground (FIG. 7 (b)).

After that, the tip of the wire rope is hooked on the

flexible hooks

603A and 603B of the blade holder 601, the winch hoisting machine 302 is rotated forward, and the blade holder 601 is lifted by the maintenance lifting machine 501 and held by the blade holder 601. A new replacement wind turbine blade 102a also vertically rises (FIG. 7 (c)).

Once raised to the vertical state, the lifting operation is temporarily stopped, and the operator on the maintenance work stage 401 adjusts the angle of the wind turbine blade 102a, and further lifts the blade holder 601 and mounts it on the tip of the rotation shaft of the wind turbine 102. It is connected to the boss 102b (FIG. 7 (d)).

When the replacement to the new wind turbine blade 102a is completed, the blade holder 601 is removed from the wind turbine blade 102a, and is lowered from the wind turbine tower 101 together with the operator on the maintenance work stage 401 (FIG. 7 (e)).

Furthermore, the maintenance lifting gear 501 is also lowered from the wind turbine tower 101, moved to the top end of the wind turbine tower 101 by the maintenance lift 108, and the pulley band 201 wound around and fixed to the top end is removed. When the maintenance elevator 108 is lowered, when the rack rail 106 and the metal band fixing band 105 are removed, the generator 103 is rotationally driven by the horizontal axis propeller type three-bladed wind turbine 102 at the upper end of the wind turbine tower 101. The wind turbine generator 100 is renewed to a wind power generation facility 100 having a structure in which a wind turbine blade 102 a is detachably attached to a boss 102 b of the wind turbine 102 (FIG. 7 (f)).

The main essential feature of the present invention is that when it is necessary to access from outside the large, tall, and unobstructed tubular structure, the work site carries and builds equipment and materials. Even in the above-mentioned situation with many limitations, it is possible to solve the big problems of the prior art that it is necessary to use a huge crane and a large scale work crane.

The object to be installed that can make the most of such features of the present invention is not limited to a wind power generation tower as a wind power generation facility. For example, various large chimneys and tower-like structures of various production and processing facilities And piers etc. can also be mentioned.

As apparent from the above description, according to the maintenance device used for the maintenance method of the wind turbine blade of the wind power generation facility according to the present invention, practical and extremely useful effects as listed below can be obtained.
(A) It can be easily constructed even in places where huge clay can not be used due to restrictions on transportation and operation.
(B) It can be easily constructed even in a place where large scale work gutters can not be constructed due to the space restrictions and the like.
(C) In addition, the cost and the construction period can be significantly reduced compared with the method using a large clay or a large scale work gutter.
(D) As in the case of a wind power generation tower, even if the installation area is turned into a park, the extent to which the park is destroyed due to the repair work can be minimized.
(E) Even when the wind power generation tower is built on the sea, the many excellent features of the present invention can be exhibited as they are.
(F) Workers on the work platform can proceed efficiently with safety secured.
(G) The construction of the repair device does not require a particularly skilled worker.
(H) If the required work period is 60 days or more, there is a related law that requires application for permission of construction, but the method of the present invention does not require notification etc. for installation and removal of the maintenance elevator, and the required work period Because it takes less than 60 days, it is possible to save time for this permission application.

The maintenance method which repairs the wind turbine tower which is one Example of the maintenance method of the windmill blade of the wind power generation equipment by this invention with a windmill blade attached is shown, (a)-(c) is a side view. It is a conceptual diagram which shows a band with a pulley. The maintenance work stage is shown, (a) is a side view, (b) is a top view. The maintenance construction method which removes the damaged windmill blade is shown, (a)-(h) is a side view. The conceptual diagram of the lifting machine for maintenance is shown, (a) is a side view, (b) is an enlarged view of a base end part. It is a conceptual diagram showing a blade holder. A maintenance method of replacing with a new wind turbine blade is shown, and (a) to (e) are side views. A wind power generation installation is shown, (a) is a side view, (b) is an enlarged view of a windmill blade part. It is explanatory drawing which mounts a rack rail in the outer peripheral surface of a windmill tower. It is explanatory drawing of a metal belt fixed band. It is explanatory drawing of the metal fitting which winds and fixes a metal band fixing band. The scaffolding plate of the elevator for maintenance is shown, (a) is a top view in the state adjacent to the top end of a windmill tower without a gap, (b) is a top view in the state where the gap near the base end of a windmill tower was spread. It is a conceptual diagram which shows the drive device and damping device for raising and lowering of a maintenance elevator.

Explanation of sign

DESCRIPTION OF SYMBOLS 100 Wind power generation equipment 101 Wind turbine tower 102 Wind turbine 102a Wind turbine blade 102b Boss 103 Generator 105 Metal band fixing band 106 Rack rail 107 Drive device for lifting 108 Maintenance elevator 110 Braking device 201 Band with pulley 202 Fixed band 301 with boss Winch winding up Machine 302 Winch hoisting machine 401 Maintenance work stage 402 Scaffolding plate 501 Maintenance lifting machine 601 Blade holder

Claims

A maintenance method and a maintenance device for performing repair work of a wind turbine blade of an existing wind power generation facility and its functional parts and the like with minimum cost and cost as much as possible, and a base of the outer peripheral surface of the wind turbine tower without any clue. A metal band fixing band is releasably wound around and fixed to two upper and lower places near the end at predetermined intervals, and a rack rail of a predetermined length is detachably constructed between a pair of upper and lower metal band fixing bands. A maintenance elevator with a drive for lifting and lowering is installed and moved on the rail, and the metal band fixing band is wound again to extend the rack rail upward, and the rack rail is connected sequentially to the top end of the wind turbine tower When,
A work step of winding and fixing a lifting pulley band on the top end of the wind turbine tower using the maintenance elevator installed on the rack rail;
A work step of vertically moving a maintenance work stage to a predetermined position by the pulley of the band with a pulley and a winch hoist installed on the ground;
And a work process that enables the worker on the maintenance work stage to repair from the tip to the root of the wind turbine blade by moving the maintenance work stage.
The maintenance elevator includes a pinion meshing with the rack of the rack rail, and a pinching roller for clamping the rack rail in cooperation with the pinion to maintain the meshing state, and is driven by a generator. A motor that is connected to the rotary shaft of the pinion to move up and down, and a braking device comprising a worm reduction gear of a mechanical brake and an electromagnetic brake that operates in an electrical trouble. The maintenance apparatus used for the maintenance construction method of the windmill blade of the wind power generation equipment of Claim 1 of Claim 1.
The maintenance work stage is characterized in that the scaffolding plate of the work stage is provided with two small scaffolds movable so as to sandwich the wind turbine blade in order to correspond to the size, length and angle of the wind turbine blade. A maintenance device used for a maintenance method of a wind turbine blade of a wind power generation facility according to claim 1.
A maintenance method and a maintenance device for performing replacement work of a wind turbine blade of an existing wind power generation facility and its functional parts and the like with minimum cost and cost as much as possible. A metal band fixing band is releasably wound around and fixed to two upper and lower places near the end at predetermined intervals, and a rack rail of a predetermined length is detachably constructed between a pair of upper and lower metal band fixing bands. A maintenance elevator with a drive for lifting and lowering is installed and moved on the rail, and the metal band fixing band is wound again to extend the rack rail upward, and the rack rail is connected sequentially to the top end of the wind turbine tower When,
A work step of winding and fixing a lifting pulley band on the top end of the wind turbine tower using the maintenance elevator installed on the rack rail;
A work process for lifting a maintenance lifting machine by the pulley of the band with a pulley and a winch hoist installed on the ground;
A work step of vertically moving a maintenance work stage to a predetermined position by the pulley of the band with a pulley and a winch hoist installed on the ground;
A work step of attaching a blade holder for holding a wind turbine blade to the wind turbine blade by an operator on the maintenance work stage;
A working step of moving up and down the blade holder holding the wind turbine blades by the maintenance lifting machine and a winch hoist installed on the ground;
A wind power generating facility including a working step of removing and attaching the wind turbine blade held by the blade holder from a boss of the wind turbine tower and replacing the damaged wind turbine blade with a new wind turbine blade from a damaged wind turbine blade Wind turbine blade maintenance method.
The maintenance lifting machine comprises a pulley for lifting the blade holder holding the wind turbine blades, and the base end is a boss fixed band wound around and fixed to the wind turbine tower and a boss portion of the lifting machine by means of insertion pins The maintenance device used for the maintenance method of the windmill blade of wind power generation equipment according to claim 4 characterized in that it is integrated and fixed.
The blade holder symmetrically combines two clamps having a plane whose inner side conforms to the cross section of the wind turbine blade, sandwiching and holding the wind turbine blade between them, and, on the outer side of the clamp, The maintenance device used for the maintenance method of the windmill blade of the wind power generation facility according to claim 4, characterized in that a universal hook with a rotation mechanism is attached to both left and right.