TWI626371B - Offshore wind turbine installation system and installation method thereof - Google Patents

Abstract

An offshore wind turbine installation system and a mounting method thereof, the wind power generator is assembled on the shore, the crane is horizontally swayed on the shore and the sling is rolled up to lift the parts to complete the wind power generator. The loading of the wind turbine before going out to sea is moved to the preparatory position by the boom, and then lifted by the spreader with the two towers of the platform on the sea, and the wind is generated by the two towers sliding straight with the slide. The motor is moved to the positioning area on the platform; when the platform is sailing from the sea to the fixed point of the installation, the two towers are used to lift the wind turbine in the placement area by the spreader, and the two towers are straight with the slide table. The invention is constructed by slipping the hoisted wind turbine out of the placement area and installing it at a fixed point to complete the installation of the wind turbine at sea.

Description

Offshore wind turbine installation system and installation method thereof

The invention relates to wind power generation, in particular to an offshore wind turbine installation system and a mounting method thereof.

As shown in Fig. 16, the conventional wind power generator mainly includes a body 91, a blade 92 and a column 93, which are commonly disposed on the shore of the sea, and the sea body 15 is rotated by the sea breeze to cause the body 91 to generate electricity and energy. The other is to install the wind turbine offshore and install it on the sea surface, which can gain the advantage of strong sea breeze power generation and will not occupy the space available on land.

The above-mentioned wind power generator, if it is an offshore installer, has a large volume and, in the case of limited carrying equipment, it is difficult to carry the whole machine to the sea surface. As shown in Fig. 17, it is usually a number of The body 91, the blade 92 and the column 93 of the wind power generator are first disassembled and fixed on the installation ship 94, and then carried by the installation ship 94 to the fixed point on the sea, and the ship is installed by the personnel 94, and the wind power generator is suspended. Hang to a fixed point for a step-by-step installation. However, installing a wind turbine on the sea surface is quite inconvenient and dangerous because it is carried on the shore.

In order to transport the wind turbine to the fixed-point installation on the sea, the wind turbine is assembled on the shore, and then the assembled wind turbine is lifted by a floating crane that is specially suspended at sea. Carryed to the aforementioned fixed point. However, the above-mentioned floating crane usually has a single boom on the hull, because there is only a single point at the joint of the hull, and the wind turbine to be hoisted is bulky and heavy, and must be attached to the ship when hanging. Have a certain length while maintaining proper distance Degree, so the boom must have considerable requirements in terms of structural strength, resulting in a relatively expensive cost. Therefore, in the unit responsible for installing the wind turbine, it is usually not purchased for the purpose of offshore installation of the wind turbine. Gondolas, even if they are rented, require high rents. Therefore, although the floating cranes have higher installation efficiency, they are still not preferred because of the installation cost.

Therefore, how to solve the above problem of the offshore installation of the conventional wind power generator is the focus of the present invention.

The main object of the present invention is to solve the above problems and to provide an offshore wind turbine installation system and a mounting method thereof, which mainly reduce the cost required for offshore installation of a wind power generator, and can provide installation efficiency and convenience.

The wind turbine is provided with a plurality of blades mounted on the top end of a column, and the body can generate electricity when the plurality of blades are driven by the wind to rotate. To achieve the foregoing objective, the mounting system includes: an onshore lifting unit having a first tower disposed on the shore, and a boom that can be driven and horizontally swung at the top of the first tower, and has a The first hoist is fixed at the position of the first tower, the jib has two first fixed pulleys at the same end and is separated by a distance, and the pair of first slings can be connected by one end by being rolled In the first hoisting machine, and respectively hang down the ground after passing through the two first fixed pulleys, each of the first slings has a first spreader at the hanging end; an offshore lifting unit has a voyage at sea a platform having a pillar extendable to the sea floor to be fixed to the seabed, and a pair of slides on the two sides of the symmetry are linearly slidable in parallel on the platform, and placed between the pair of slides In the area, each of the sliding tables has a second tower extending from the top of the platform, and each of the second towers has a second hoisting position a second fixed pulley on the same side of the second tower that can extend out of the platform, the second fixed pulley is at the same level on both sides of the placement area, and the second tower The second sling has a second hoist which can be connected to the second hoist of the second tower at one end, and can hang down the platform after passing through the second fixed pulley of the second tower. The second sling has a second spreader at the hanging end; a hanging member can be fixed to the column of the wind power generator, and the two first spreaders can be combined to lift the wind generator, and The horizontal swing of the boom is displaced on the shore; or the combination of the second and second spreaders can also lift the wind turbine and linearly slide along the sea at the second tower.

Wherein the boom is rotatably disposed on the first tower base with a rotating shaft, the first tower has an annular cushion body under the boom, and a bottom portion of the boom is slidably carried on the bottom of the boom a pad body for supporting the boom to swing on the first tower; the first tower seat is provided with an annular clamping seat, and the plurality of hydraulic cylinders are respectively movable at one end but can be temporarily fixedly connected thereto. The holder is coupled to the boom at the other end, and the boom is gradually pushed by the plurality of hydraulic cylinders to rotate on the first tower.

The path corresponding to the linear sliding of the sliding table on the platform has a pair of opposite outer rails and a pair of opposite inner clamping seats, wherein the pair of guiding rails and the pair of clamping seats are straight and arranged in parallel on the platform. Each of the sliding table bases is slidably disposed on the pair of guide rails; each of the pair of clamping bases has a plurality of hydraulic cylinders respectively movable at one end but temporarily fixedly coupled, and the other end of each of the hydraulic cylinders is coupled to the sliding table, each of The slide table can be linearly slid on the platform by being gradually pushed by the connected plurality of hydraulic cylinders.

Wherein, the cross section of the clamping seat is in the shape of a workpiece, and each of the hydraulic cylinders has a clamp at the end connected to the clamping seat, and is movably assembled on the top of the clamping seat, and the clamping clamp has a plurality of clamps a cylinder, wherein the clamp can be temporarily fixed by being clamped to the clamp by the plurality of clamp cylinders, or the clamp can be released to move on the clamp.

Wherein, the two second towers are provided with a cushion spanning the two second towers on a side of the second fixed pulley, and are connected at both ends by a cable provided with a weight. a second tower and the hanging member; when the two second towers hoist the wind turbine and slide the second winder, the cushion is used to abut the column of the wind power generator in the slip, and The cable pulls the hanger to the cushion when the weight is set, and the wind turbine for slipping does not shake.

Wherein, the top of each of the second towers has a substrate, and a sliding plate is disposed on the substrate, and the second fixed pulley is disposed on the sliding plate, and one side of the sliding plate is coupled to a hydraulic cylinder on the substrate, and the hydraulic cylinder can be Pushing the sliding plate to linearly slide on the substrate in the axial direction of the second fixed pulley, the sliding plate has a first perforation for passing through the second sling of the second fixed pulley when hanging down, The substrate has a second perforation that is connectable to the first perforation when the slider is linearly slid.

Wherein, the hanging member comprises a coupling member and a pair of hooks, the coupling member has a through hole for the column of the wind power generator, and the column has a block on the outer periphery of the column for supporting the coupling member a ring, the joint member has a plurality of first hook portions on opposite sides; each of the hooks can be hooked on the two second spreaders, and each of the hooks has a plurality of second hook portions on one side and the joint The plurality of first hooks on either side of the piece are hooked to each other.

Wherein, the first crane has a movable pulley, and a hook portion is disposed below the movable pulley. After the first sling is suspended by the first fixed pulley, the first fixed pulley is wound back several times after passing the movable pulley. And positioning the first spreader at one end of the first sling; the joint is provided with a sling, the first sling is combined with the sling to lift the wind power generator.

Wherein, the second crane has a movable pulley, and a hook portion is disposed below the movable pulley. After the second sling is suspended by the second fixed pulley, the second fixed pulley is retracted several times after passing the movable pulley. And positioning the second spreader at one end of the aforementioned second sling.

Wherein, the onshore lifting unit is provided with a retaining wall on the ground around the first tower, and the wind power generator suspended by the first spreader can be restrained in the retaining wall with the bottom end of the pillar.

Wherein, the first tower is provided with a water tank for the first spreader to lift the wind generator; and the second tower is respectively provided for the second spreader to lift the wind generator Heavy water tank.

In order to achieve the foregoing object, a method for installing a wind power generator at sea by the installation system includes: assembling on the shore: lifting the aforementioned body and blade with the first spreader provided by the first sling rolled by the first hoist And the column, and the boom is driven on the first tower to horizontally swing to complete the foregoing wind turbine on the shore; before the sea loading: the wind is assembled by the swing of the boom The generator is moved to a preparatory position on the shore side, and the platform is moved to the aforementioned shore by the sea, and the second sling rolled by the second hoist is lifted in the second sling by the set a wind turbine at a position, and the second tower is linearly slid with the slide table, and the hoisted wind power generator is moved to the placement area, and the horizontal support member is disposed at the placement area to fix the Wind power generator; and fixed-point installation at sea: when the platform is sailing from the sea to the fixed point of the installation, the second tower is lifted by the second spreader as described above, and the wind turbine located in the set-up area is lifted as described above. And the second tower is slid with the slide straight The wind power generator disposed out of the zone, and the point in the installation of the wind turbine, to complete the installation of offshore wind turbines.

The above and other objects and advantages of the present invention will be readily understood from

Of course, the invention may be varied on certain components, or in the arrangement of the components, but the selected embodiments are described in detail in the specification and their construction is shown in the drawings.

(customized part)

91‧‧‧ body

92‧‧‧ column

93‧‧‧ leaves

(part of the invention)

1‧‧‧ wind turbine

11‧‧‧ body

12‧‧‧ leaves

13‧‧‧ column

131‧‧ ‧ retaining ring

2‧‧‧ Shore lifting unit

21‧‧‧The first tower

211‧‧‧ ring body

212‧‧‧Clip seat

22‧‧‧Boom

221‧‧‧first fixed pulley

222‧‧‧ shaft

223‧‧‧guide

23‧‧‧First winch

24‧‧‧First sling

25‧‧‧First spreader

251‧‧‧ movable pulley

252‧‧‧ hook

253‧‧‧ sling

26‧‧‧Hydraulic cylinder

261‧‧‧ fixture

262‧‧‧Clamp cylinder

27‧‧‧Water tank

3‧‧‧ offshore lifting unit

31‧‧‧ platform

311‧‧‧rail

312‧‧‧Clip seat

32‧‧‧ pillar

33‧‧‧ slide table

330‧‧‧ slide

34‧‧‧Placement area

35‧‧‧Second Tower

351‧‧‧Second fixed pulley

352‧‧‧Cushion

353‧‧‧weights

354‧‧‧Laso

355‧‧‧ horizontal support

356‧‧‧Substrate

357‧‧‧ Skateboarding

358‧‧‧Hydraulic cylinder

359‧‧‧First perforation

350‧‧‧Second perforation

36‧‧‧Second winch

37‧‧‧Second sling

38‧‧‧Second spreader

381‧‧‧ movable pulley

382‧‧‧ hook

39‧‧‧Hydraulic cylinder

391‧‧‧Clamp

392‧‧‧Cartridge

30‧‧‧Water tank

4‧‧‧ hanging pieces

41‧‧‧Connected parts

411‧‧‧Perforation

412‧‧‧First hook

413‧‧‧ rings

42‧‧‧ hook

421‧‧‧Second hook

5‧‧‧Retaining wall

Fig. 1 is a front elevational view showing the configuration of an offshore wind turbine installation system according to an embodiment of the present invention.

Fig. 2 is a schematic view showing the configuration in which the boom of the embodiment of the present invention is disposed on the first tower and can be driven to swing horizontally.

Fig. 3 is a schematic view showing the hoisting of a wind power generator by an offshore lifting unit according to an embodiment of the present invention.

Fig. 4 is a partial schematic view showing the second spreader of the embodiment of the present invention in which the hook and the engaging member are hooked and joined.

Fig. 5 is a partial schematic view showing the boom of the embodiment of the present invention joined by a rotating shaft on the first tower.

Fig. 6 is a schematic view showing the boom of Fig. 2 being driven by a hydraulic cylinder on a first tower and horizontally swung.

Figure 7 is a schematic view of the offshore lifting unit of the embodiment of the present invention on a platform overlooking the two slides. The figure also shows that three wind turbines (represented by columns) are placed in the placement area.

Fig. 8 is a schematic view showing the slide table of the embodiment of the present invention which is disposed on the guide rail and linearly slidable.

Figure 9 is a schematic view showing the slide table of the embodiment of the present invention which is disposed on the guide rail and is provided with a driving hydraulic cylinder.

Fig. 10 is a schematic view showing the linear displacement of the hydraulic cylinder driving slide table in Fig. 9.

Figure 11 is a schematic view showing the fixture of the onshore lifting unit or the offshore lifting unit of the embodiment of the present invention disposed on the holder.

Figure 12 is a schematic illustration of the offshore crane unit of the embodiment of the present invention lifting a wind turbine at a second position with a second sling suspended from the shore.

Figure 13 is a schematic diagram of the second sling of Figure 12 after the wind turbine is lifted, with the second tower sliding straight on the slide table, and the wind turbine can be placed in the placement area after the slip Inside.

Figure 14 is a schematic illustration of the second fixed pulley at the top of the second tower of the embodiment of the present invention which can be driven by the hydraulic cylinder to move sideways.

Fig. 15 is a partial schematic view showing one side of the substrate and the slide plate when the stack of the substrate and the slide plate are overlapped, and it is seen that the side of the slide plate holds the substrate without rolling.

Figure 16 is a schematic diagram of a conventional wind turbine.

Figure 17 is a schematic diagram of the conventional wind turbine disassembled and then placed on the installation ship.

Referring to Figures 1 through 15, the structure of the embodiment selected for use in the present invention is for illustrative purposes only and is not limited by such structure in the patent application.

The embodiment provides an offshore wind turbine installation system and a mounting method thereof. As shown in FIG. 1 , the wind turbine 1 is equipped with a plurality of blades 12 , and the body 11 is disposed at a top end of the column 13 , and the body 11 Power can be generated when the plurality of blades 12 are driven by the wind to rotate. The mounting system, as shown in FIG. 1, includes an onshore lifting unit 2, an offshore lifting unit 3, and a hanging member 4, wherein: as shown in Fig. 1, the onshore lifting unit 2 has a shore. The first tower 21 is provided with a boom 22 which can be driven and horizontally swung at the top of the first tower 21, and a first hoisting machine 23 is fixed at the position of the first tower 21 (in this embodiment Located at the bottom of the first tower 21). As shown in Figures 1 to 2, the boom 22 has two first fixed pulleys 221 at the same end and separated by a distance, and a pair of first slings 24 can be rolled and connected at one end. hoist 23, and respectively hanging around the first fixed pulley 221 and hanging down to the ground, each of the first slings 24 has a first spreader 25 at the hanging end.

As shown in Figures 1 and 3, the offshore lifting unit 3 has a platform 31 that can sail at sea. The platform 31 has a pillar 32 that can be extended to the sea floor and fixed to the seabed, and has a pair of sliding tables on both sides of the symmetry. 33 can be linearly slid in parallel on the platform 31, and there is a placement area 34 between the pair of slides 33 (please refer to Figure 7), and each slide table 33 has a second tower 35, each second The top end of the tower 35 can extend beyond the platform 31, and each second tower 35 is located at a position of a second hoist 36 (on the slide table 33 in this embodiment). As shown in the first and third figures, the second second tower 35 has a second fixed pulley 351 at the top end of the same side of the extension platform 31, and the second fixed pulley 351 is located at the same position on both sides of the placement area 34. The second tower 35 has a second sling 37 connected to the second hoist 36 of the second tower 35 at one end and second to the second tower 35 at the second tower 35. The fixed pulley 351 can be lowered toward the platform 31, and each of the second slings 37 has a second spreader 38 at the hanging end.

As shown in Figures 1, 3 and 4, the hanger 4 can be fixed to the upright 13 of the wind generator 1 for the combination of the two first spreaders 25 to lift the wind turbine 1 and with the boom 22 The horizontal swinging is displaced on the shore; the hanging member 4 can also be combined with the second second spreader 38 (the hook portion 382 shown in the figure) to lift the wind power generator 1 as well as the second tower. Seat 35 slides straight in the sea.

As shown in the second and fifth figures, the boom 22 of the embodiment is rotatably disposed on the first tower 21 by a rotating shaft 222. The first tower 21 has an annular pad 211 under the boom 22, and the boom At the bottom of the 22, a guide portion 223 is slidably carried on the pad body 211, and the support arm 22 is swung on the first tower 21. The first tower 21 is provided with an annular clamping seat 212. The plurality of hydraulic cylinders 26 are respectively movable at one end but can be temporarily fixedly coupled to the clamping seat 212, and the other end is coupled to the lifting arm. 22, and as shown in Figs. 2 and 6, the reciprocating operation can be performed by the plurality of hydraulic cylinders 26 to gradually push the boom 22 to rotate on the first tower 21.

As shown in FIGS. 7 to 9, the path of the platform 31 of the present embodiment corresponding to the linear sliding of each of the slide tables 33 has a pair of opposite outer guide rails 311 and a pair of opposite inner clamps 312, the pair of guide rails 311 and the The clamping seats 312 are all in a straight line and are arranged in parallel on the platform 31. Each sliding table 33 has a sliding seat 330 at the bottom and is slidably disposed on the pair of guiding rails 311. Each pair of clamping seats 312 has a plurality of hydraulic cylinders 39 respectively. The movement is temporarily fixedly coupled, and the other end of each hydraulic cylinder 39 is coupled to the slide table 33, and each of the slide tables 33 reciprocates as shown in Figs. 9 and 10, and can be gradually pushed by the connected plurality of hydraulic cylinders 39. Straight on the platform 31.

As shown in FIG. 11, the cross-section of the holder 212 is in the shape of a workpiece. Each of the hydraulic cylinders 26 has a clamp 261 at the end coupled to the holder 212. The clamp 261 is movably assembled on the top of the holder 212. The clamp 261 has a plurality of clips. The cylinder 262, the clamp 261 is temporarily fixed by the plurality of clamp cylinders 262 being fastened to the clamp 212, or the clamp 212 is released to be movable on the clamp 212. As shown in FIG. 11 , the cross section of the clamping seat 312 is also in the shape of a workpiece. Each hydraulic cylinder 39 has a clamp 391 at the end connected to the clamping seat 312 and is movably assembled on the top of the clamping seat 312. There is a plurality of clamping cylinders 392, and the clamp 391 is temporarily fixed by the plurality of clamping cylinders 392 being fastened to the clamping seat 312, or the clamping seat 312 is loosened to be movable on the clamping seat 312.

As shown in Figures 1, 3 and 12, the second second tower 35 is provided with a cushion 352 spanning the second tower base 35 on the side where the second fixed pulley 351 is disposed, and is provided with a weight. The cable 354 of 353 is coupled to the second tower 35 and the hanger 4 at both ends, and the wind turbine 1 for slippage does not wobble.

As shown in FIGS. 14 to 15, each of the second towers 35 has a base plate 356 at its top end. A slide plate 357 is disposed on the base plate 356 to hold the base plate 356 sideways. The second fixed pulley 351 is disposed on the slide plate 357. One side of the base plate 356 is coupled to a hydraulic cylinder 358, and the hydraulic cylinder 358 can push the slide plate The 357 is linearly slid on the substrate 356 in the axial direction of the second fixed pulley 351. The sliding plate 357 has a first through hole 359 for the second sling 37 passing through the second fixed pulley 351 to pass through while hanging down. The substrate 356 has a The second perforation 350 can communicate with the first perforation 359 when the slider 357 is linearly slid.

As shown in FIG. 4, the hanging member 4 includes a coupling member 41 and a pair of hooks 42. The coupling member 41 has a through hole 411 for the column 13 of the wind power generator 1. The column 13 has a periphery on one side. Supporting the retaining ring 131 on the coupling member 41, the coupling member 41 has a plurality of first hook portions 412 on opposite sides; each hook 42 can be hooked on the second second spreader 38, and each hook 42 is in a The plurality of second hook portions 421 on the side may be hooked to the plurality of first hook portions 412 on either side of the joint member 41, and the second spreader 38 lifts the wind power generator 1.

The first spreader 25 has a movable pulley 251, and a hook portion 252 is disposed below the movable pulley 251. After the first sling 24 is suspended by the first fixed pulley 221, the first pulley 221 is wound around the movable pulley 251 and then retracted to the first fixed pulley 221 several times. To locate the end of the first spreader 25 hanging down the first sling 24; the joint member 41 is provided with a lifting ring 413, and the first spreader 25 (the hook portion 252 shown in the figure) is coupled with the lifting loop 413 by the sling 253. To lift the wind turbine 1 . The second spreader 38 has a movable pulley 381, and a hook portion 382 is disposed below the movable pulley 381. After the second sling 37 is suspended by the second fixed pulley 351, the second pulley 351 is wound back around the movable pulley 381. In order to position the end of the second spreader 38 at the second sling 37.

The first tower 21 of the present embodiment is provided with a water tank 27 for weighting when the first spreader 25 lifts the wind power generator 1. The second tower 35 of the second embodiment is provided with a water tank 30 for weighting the wind turbine 1 when the second spreader 38 lifts the wind turbine 1 .

The above-mentioned offshore wind turbine installation system, the method of installing the wind power generator at sea includes the assembly on the shore, the loading before going to sea, and the fixed-point installation at sea, wherein: In the assembly operation on the shore, the first sling 24, which is scrolled by the first hoisting machine 23, lifts the body 11, the blade 12 and the column 13 with the first spreader 25 provided, and cooperates with the boom 22 at the first tower. The 21 is driven and horizontally swung to complete the aforementioned wind turbine on the shore.

The loading operation before going to sea is performed after the wind turbine 1 is assembled on the shore, and the assembled wind turbine 1 is moved to a preparatory position on the bank side by the swing of the boom 22, and As shown in Figures 12 to 13, the platform 31 is moved offshore to the aforementioned shore, and the second tower 35 is linearly slidable with the slide 33 to the shore, and the second sling 37 is rolled by the second hoist 36. The wind turbine 1 located at the preparatory position is lifted by the second spreader 38, and the hoisted wind power generator 1 is moved to the position by the two second towers 35 linearly sliding with the slide table 33. The zone 34 is positioned. In this embodiment, three wind turbines 1 can be disposed in the present embodiment (the column 13 is placed in the position). Each wind turbine 1 is loaded on the placement area 34 of the platform 3 and positioned, and is disposed in the placement area 34 with the horizontal support member 355 to fix the wind power generator 1 to prevent the wind power generator 1 from sailing with the platform 3. Shake it, you can sail to the fixed point of the installation. In this embodiment, in order to prevent the hoisted wind power generator from excessively shaking in the preparatory position, the onshore lifting unit 2 is provided with a retaining wall 5 on the ground around the first tower 21, and the prefabricated wall 5 is provided therein. At the location of the ground, the wind turbine 1 hoisted by the first spreader 25 can be restrained in the retaining wall 5 with the bottom end of its upright 13 .

The fixed-point installation operation at sea is to hoist the wind turbine 1 located in the placement area 34 by the second tower 35 and the second spreader 38 as described above when the vehicle is sailing to the fixed point of the installation. The second tower 35 linearly slides with the slide table 33 to move the hoisted wind power generator 1 out of the placement area 34, and installs the wind power generator 1 at the aforementioned fixed point to complete the installation of the wind power generator 1 at sea.

From the above description, it is not difficult to find that the advantages of the present invention are that the onshore lifting unit 2 and the offshore lifting unit 3 both hang the wind power generator 1 in pairs with the sling, compared to the conventional floating crane In the form of the wind turbine generator hanging in the whole machine, the wind power generator 1 can be provided with sufficient hanging capacity with a simplified lifting structure to complete the assembly of the wind power generator 1 on the shore. The loading before going to sea and the fixed-point installation at sea can reduce the cost of offshore installation of wind turbine 1, and provide installation efficiency and convenience.

The above description of the embodiments is intended to be illustrative of the invention and is not intended to limit the scope of the invention.

From the above detailed description, it will be apparent to those skilled in the art that the present invention can achieve the foregoing objects and is in accordance with the provisions of the Patent Law.

Claims (12)

An offshore wind turbine installation system, wherein the wind turbine is provided with a plurality of blades disposed at a top end of a column, and the body can generate electricity when the plurality of blades are driven by the wind to rotate, the installation system comprising: a shore The lifting unit has a first tower seated on the shore, a boom that can be driven and horizontally swinged at the top of the first tower, and a first hoist fixed at the position of the first tower The boom has two first fixed pulleys at the same level and separated by a distance, and a pair of first slings can be connected to the first hoist at one end by scrolling, and respectively bypass the two slings A certain pulley hangs down to the ground, and each of the first slings has a first spreader at the hanging end; an offshore hoisting unit has a platform that can sail at sea, and the platform has a platform that can be extended to the sea floor. a pillar on the seabed, and a pair of slides on the two sides of the symmetry are linearly slidable in parallel on the platform, and a placement area is disposed between the pair of slides, and each of the slides has a top end extending therefrom Second tower outside the platform Each of the second towers has a second hoist at a position on the same side, and a second fixed pulley is respectively disposed at a top end of the platform outside the platform, and the second fixed pulleys are located at the placement area. The two towers are at the same level, and each of the second towers has a second sling connected to the second hoist of the second tower at one end and the second tower of the second tower After the pulley is fixed, the platform can be suspended, and each of the second slings has a second spreader at the hanging end; A hanging member can be fixed to the column of the wind generator, and the second spreader can be combined to lift the wind generator and linearly slide along the sea at the second tower. The offshore wind turbine installation system according to claim 1, wherein the boom is rotatably disposed on the first tower, and the first tower has an annular pad below the boom. The bottom of the boom has a guiding portion slidably supported on the cushion body, and the boom can be supported to swing on the first tower; the first tower seat is provided with an annular clamping seat, and the plurality of hydraulic pressure The cylinders are respectively movable at one end but can be temporarily fixedly coupled to the holder, and the other end is coupled to the boom, and the boom can be gradually pushed by the plurality of hydraulic cylinders to rotate on the first tower. The offshore wind turbine installation system according to claim 1, wherein the path corresponding to each of the slides linearly slipping on the platform has a pair of opposite outer guide rails and a pair of opposite inner clamps, the pair of guide rails and the pair The clamping bases are all in a straight line and are arranged in parallel on the platform. Each sliding platform has a sliding seat at the bottom thereof and is slidably disposed on the pair of guiding rails; each pair of clamping seats has a plurality of hydraulic cylinders respectively movable at one end but temporarily fixed The ground is coupled, and the other end of each of the hydraulic cylinders is coupled to the sliding table, and each of the sliding tables is gradually pushed by the connected plurality of hydraulic cylinders to linearly slide on the platform. The offshore wind turbine installation system according to claim 2 or 3, wherein the clamping seat has a cross-section, and each of the hydraulic cylinders is movably assembled at a side connected to the clamping seat. The top of the holder, there are multiple clips in the fixture a cylinder, wherein the clamp can be temporarily fixed by being clamped to the clamp by the plurality of clamp cylinders, or the clamp can be released to move on the clamp. The offshore wind turbine installation system according to claim 1, wherein the two second towers are provided with a cushion spanning the two second towers on a side of the second fixed pulley, and a cable having a weight is coupled to the second tower and the hanger at both ends; and the second tower is lifted by the second spreader and is slid by the second spreader The column of the wind turbine in the slip is abutted, and when the cable is sunk when the weight is set, the hanger is pulled to the cushion, and the wind turbine for slipping does not shake. The offshore wind turbine installation system of claim 1, wherein each of the second towers has a substrate at a top end thereof, and a sliding plate is disposed on the substrate to fasten the substrate to the side, and the second fixed pulley is disposed on the substrate On the sliding plate, one side of the sliding plate is connected with a hydraulic cylinder on the base plate, and the hydraulic cylinder can push the sliding plate to linearly slide on the substrate in the axial direction of the second fixed pulley, and the sliding plate has a winding passage. The second sling of the second fixed pulley passes through the first through hole when hanging down, and the substrate has a second through hole which can communicate with the first through hole when the sliding plate is linearly slid. The offshore wind turbine installation system according to claim 1, wherein the hanging member comprises a joint member and a pair of hooks, the joint member has a perforation for the column of the wind power generator, the column is in a a peripheral ring having a retaining ring supported on the joint member, the joint member having a plurality of first hook portions on opposite sides; each of the hooks can be hooked on the two second spreaders, and each of the hangers Hook on one side The plurality of second hook portions may be hooked to the plurality of first hook portions on either side of the coupling member. The offshore wind turbine installation system according to claim 7, wherein the first crane has a movable pulley, and a hook portion is disposed below the movable pulley, and the first sling is suspended by the first fixed pulley. After the movable pulley, the first fixed pulley is wound back several times to locate one end of the first spreader hanging down the first sling; the joint is provided with a sling, and the first sling is combined with the sling To lift the wind turbine. The offshore wind turbine installation system according to claim 1, wherein the second crane has a movable pulley, and a hook portion is disposed below the movable pulley, and the second sling is suspended by the second fixed pulley. After the movable pulley, the second fixed pulley is wound back several times to locate the end of the second spreader hanging down the second sling. The offshore wind turbine installation system according to claim 1, wherein the onshore lifting unit is provided with a retaining wall on a ground surrounding the first tower, and the wind turbine hoisted by the first spreader can be a column thereof The bottom end is limited to the retaining wall. The offshore wind turbine installation system according to claim 1, wherein the first tower is provided with a water tank for lifting the wind generator when the first spreader is lifted; the second towers are respectively provided A water tank for the weight of the wind turbine when the second spreader is lifted. A method of installing a wind power generator at sea according to any one of claims 1 to 11, comprising: assembling on the shore: a first sling rolled by the first hoisting machine to set a first sling Lifting the foregoing body, the blade and the column, and supporting the boom to be horizontally swivel on the first tower to complete the aforesaid wind power generator on the shore; loading before going to sea: rotating the boom The assembled wind turbine is moved to a preparatory position on the bank of the bank, and the platform is moved to the shore by the sea, and the second tower can be moved to the shore along with the sliding of the sliding table. The second sling rolled by the second hoisting machine lifts the wind power generator located at the preparatory position with the second spreader provided, and is hoisted by the two second towers sliding straight with the slide table The wind turbine is moved to the placement area, and the horizontal support member is disposed in the placement area to fix the wind power generator; and the fixed point installation at sea: when the platform is sailing at sea to the fixed point of the installation, the second The second tower is then lifted with the second spreader as described above. Wind turbine, and the second tower is linearly slid with the slide to move the hoisted wind turbine out of the placement area, and install the wind turbine at the aforementioned fixed point to complete the wind turbine at sea Installation.