CN111252660A - Buoyancy device and method for integral transportation of offshore wind turbine - Google Patents
Buoyancy device and method for integral transportation of offshore wind turbine Download PDFInfo
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- CN111252660A CN111252660A CN202010048557.8A CN202010048557A CN111252660A CN 111252660 A CN111252660 A CN 111252660A CN 202010048557 A CN202010048557 A CN 202010048557A CN 111252660 A CN111252660 A CN 111252660A
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- fan
- wind turbine
- tower
- offshore wind
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/42—Gripping members engaging only the external or internal surfaces of the articles
- B66C1/44—Gripping members engaging only the external or internal surfaces of the articles and applying frictional forces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/02—Devices for facilitating retrieval of floating objects, e.g. for recovering crafts from water
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
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- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Wind Motors (AREA)
Abstract
The invention provides a buoyancy device for integral transportation of an offshore wind turbine, which comprises: the clamping devices are arranged along the axial direction of the tower drum of the fan and fixedly sleeved from the bottom to the middle of the tower drum; the hollow floating cylinders are fixedly connected with the clasping devices and used for providing buoyancy for the fan; the first ends of the hauling ropes are fixedly connected with the holding device, and the second ends of the hauling ropes are fixedly connected with the tug boat and wet the towing fan through the tug boat. The invention also provides an integral transportation method of the offshore wind turbine. The invention can transport the whole fan, greatly improves the transport efficiency of the fan, does not need a large-scale transport ship in the transport process and reduces the transport cost. According to the invention, the vertical wet draught fan is used for preventing the fan from deforming caused by wave load, and the fan can be directly hoisted without righting the tower drum of the fan after the fan is transported to a destination.
Description
Technical Field
The invention relates to the field of offshore wind power equipment, in particular to a buoyancy device and a buoyancy method for integral transportation of an offshore wind turbine.
Background
The offshore wind resource has the advantages of high wind speed, low turbulence, small wind shear and the like, attracts the enthusiasm of various countries in the world for developing offshore wind farms, and China also develops or plans a large number of offshore wind farms. However, as a key link of offshore wind power plant construction, namely the transportation and installation process of an offshore wind power generation set, the characteristics of high difficulty, high risk, long period and high cost are provided, and various transportation and installation solutions are provided for the characteristics in the field of wind power engineering. In general, these solutions can be divided into two categories, modular installation and transportation and bulk installation and transportation. The modular installation and transportation means that parts such as a tower barrel, an engine room and blades of the fan are transported to a machine position by a transport ship and then hoisted by a hoisting ship such as a floating crane or a self-elevating platform. When an early offshore wind farm is built, the modular installation mode is widely used due to the limitation of the capacity of hoisting equipment. The integral installation and transportation, as shown in fig. 1, means that fan parts are transported to a transfer wharf, a temporary machine position of the fan is built on the wharf for integral assembly, then the assembled fan is integrally hoisted to a large-scale transport ship, and the fan is integrally hoisted by a large-scale floating crane ship after being transferred to an offshore machine position.
For the offshore fixed type wind turbine, the integral installation and transportation method has some limitations. For example, the method usually requires a transport ship specially used for fan transportation to be matched with a large floating crane to complete integral installation and transportation. With the increase of the capacity and the structural size of the wind turbine generator, the transport ship can only load 2-4 complete machines in each navigation, and the loading capacity is difficult to meet the requirement. In addition, with the prevalence of large-scale offshore wind farm construction modes and the increasing distance between the wind farm and the shore, the more times the transport ship needs to transport the fan to and from the port during installation, the longer the sailing time, which results in longer waiting time of the large-scale floating crane at the offshore machine position, reduced installation operation efficiency and increased cost.
In recent years, the construction scale of offshore wind power plants is getting larger and larger, offshore hoisting equipment in the wind power industry is getting more and more advanced, and the scheme of integral transportation is also adopted for the tower of an offshore large-scale wind turbine generator. Specifically, the whole tower drum of the fan is assembled on the shore, and two ends of the tower drum are sealed. With the aid of the tool shown in fig. 2, the wind turbine tower is horizontally placed on the sea surface, and the integral traction transportation on the sea is realized through the buoyancy of the tower. This solution, however, also has significant drawbacks. For example, on one hand, the scheme can only realize the integral transportation of the tower barrel part, and the installation of the fan blade in the actual fan installation process takes over 2/3 of installation time, so the improvement of the whole fan installation efficiency is not obvious. On the other hand, the whole tower cylinder is a long and thin structure, and in the process of hauling the tower cylinder floating on the sea surface, the ocean waves have very large wave load on the long and thin structure, so that the buckling deformation and the damage of the tower cylinder structure are easily caused, and the construction quality and the construction period are further influenced. In addition, after the tower barrel is transported to the offshore machine position, an additional righting procedure for the tower barrel needs to be added, and the procedure is complex, high in risk and long in time consumption.
Disclosure of Invention
The invention aims to provide a buoyancy device and a buoyancy method for integral transportation of an offshore wind turbine, which can be used for integral transportation of the offshore wind turbine. The method and the device can solve the problem that the large floating crane has long waiting time in place in the transportation process of the offshore wind turbine, improve the operation efficiency, shorten the construction period of the wind power plant and reduce the renting cost of the large floating crane.
In order to achieve the above object, a buoyancy device for integral transportation of an offshore wind turbine, comprising:
the holding devices are arranged along the axial direction of the tower drum of the fan, and the outer wall of the tower drum is fixedly sleeved with the holding devices;
the same flotation pontoon of a plurality of, the flotation pontoon has hollow enclosed construction, and its fixed connection sets up the periphery of enclasping device is used for to the fan provides buoyancy.
The buoyancy device of the whole transportation of offshore wind turbine still contains:
the first ends of the hauling ropes are fixedly connected with the enclasping device, and the second ends of the hauling ropes are fixedly connected with the tug, so that the tug can wet the draught fan.
Preferably, the clasping device comprises: the plurality of holding parts are fixedly connected in sequence along the circumferential direction of the fan tower cylinder to form an annular structure matched with the tower cylinder, and the central shaft of the annular structure is superposed with the central shaft of the tower cylinder.
Preferably, the total water discharge of the plurality of buoys is more than 30% of the total weight of the fan, the buoys and the holding device.
Preferably, the buoys are equal in height; the float comprises a float body and a float cover; the buoy body is provided with an opening, and the opening is sealed by the buoy cover; the length direction of the buoy is parallel to the central shaft of the fan tower.
Preferably, the buoy is made of rubber or steel.
The invention also provides an integral transportation method of the offshore wind turbine, which is realized by adopting the buoyancy device for integral transportation of the offshore wind turbine and comprises the following steps:
s1, completing the integral assembly of the fan in a waterless dock, and keeping the fan in an upright state through hoisting equipment in the assembly process;
s2, fixedly sleeving a plurality of holding devices on the outer wall of the tower barrel along the axial direction of the tower barrel; a plurality of floating cylinders are uniformly and fixedly arranged on the periphery of the holding device, so that the fan, the holding device and the floating cylinders form a combined structure;
s3, injecting water into the dock, floating the combined structure through buoyancy generated by the buoy, and keeping the fan in a positive floating posture through a hoisting device;
s4, injecting water with the weight of G2 or a balancing weight into the buoy to balance the buoy, so that the floating center of the combined structure is positioned above the gravity center, and the blades of the fan are positioned above the sea surface;
s5, connecting the holding device and the tugboat through a traction rope, and removing the hoisting equipment; wet-dragging the composite structure to a specified position;
s6, fixedly connecting the large offshore floating crane with the tower drum, keeping the fan in an upright state, emptying the buoy, and detaching the holding device on the tower drum; and (5) hoisting the fan.
In step S2, the plurality of clasping devices are sleeved on the outer wall from the bottom to the middle of the tower.
The weight G2 in step S4 satisfies: h ═ G1 × H1+ G2 × H2)/(G1+ G2); wherein G1 is before the flotation pontoon counter weight the weight of integrated configuration, H1 is before the flotation pontoon counter weight the centre of gravity height of integrated configuration, H2 is the centre of gravity height of balancing weight, H is after the flotation pontoon counter weight the centre of gravity height of integrated configuration.
Compared with the prior art, the invention has the beneficial effects that:
1) the invention can carry out the integral transportation of the fan, and greatly improves the transportation efficiency of the fan compared with the modularized uniform speed;
2) by the aid of the offshore wind turbine transportation system, a large-scale transport ship is not needed in the offshore wind turbine transportation process, and transportation cost is reduced;
3) according to the invention, the vertical wet draught fan is adopted, so that the waterline surface of the combined structure is small, the wave load is small, and the buckling deformation and damage of the draught fan caused by the wave load are not easy to occur;
4) because the fan remains the vertical state all the time in the transportation, after the fan is transported to the destination, the fan can be directly hoisted to the designated position without increasing the righting operation procedure of the tower drum, and the working efficiency is greatly improved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are an embodiment of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts according to the drawings:
FIG. 1 is a schematic view of a prior art integrated transport wind turbine;
FIG. 2 is a schematic view of a prior art wind turbine tower transported via pontoons;
fig. 3 is a schematic structural diagram of a clasping device according to a first embodiment of the present invention.
FIG. 4 is a schematic view of a wind turbine tower connected to a clasping device according to a first embodiment of the present invention;
FIG. 5 is a schematic view illustrating a connection between a holding device, a fan tower and a buoy according to a first embodiment of the present invention;
FIG. 6 is a schematic view showing the connection of the clasping device, the blower and the buoy according to one embodiment of the present invention;
FIG. 7 is a schematic flow diagram of an overall transportation method of an offshore wind turbine according to the present invention;
fig. 8 is a schematic view illustrating connection between adjacent clasping portions by a suspension loop according to a second embodiment of the present invention.
In the figure: 1. a fan; 11. a tower drum; 12. a blade of a fan; 2. a large transport vessel; 3. a large-scale floating crane vessel; 4. a float bowl; 5. a clasping device; 51. outer arc, 52, inner arc; 53. a connecting rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 6, the present invention provides a buoyancy device for integral transportation of an offshore wind turbine, comprising: a plurality of holding devices 5, a plurality of identical buoys 4 and a plurality of hauling ropes (not shown in the figure).
As shown in FIG. 6, the upper part of the tower of the wind turbine is connected with the middle part of the tower through a boss-shaped structure, the diameter of the tower gradually decreases from the middle part of the tower to the top, and the lower part of the middle part of the tower is of a cylindrical structure. The plurality of holding devices 5 are fixedly sleeved on the outer wall from the bottom to the middle of the tower barrel along the axial direction of the tower barrel.
As shown in fig. 4, 5 and 6, the first embodiment of the present invention includes two clasping devices 5. The clasping device 5 comprises a plurality of clasping parts. Through a plurality of portion of holding tightly forms an annular structure that matches with tower section of thick bamboo 11 along the circumference direction of tower section of thick bamboo 11 fixed connection according to the preface, and the second end of adjacent portion of holding tightly is connected to the first end of the portion of holding tightly. The central axis of the ring-shaped structure coincides with the central axis of the tower 11.
As shown in fig. 3, in the first embodiment of the present invention, the clasping device 5 comprises two identical clasping portions. The clasping portion comprises two identical semicircular outer arcs 51, two identical semicircular inner arcs 52 and a plurality of connecting rods 53 which are connected and arranged between the outer arcs 51 and the inner arcs 52, between the two outer arcs 51 and between the two inner arcs 52. The inner diameter of the inner arc 52 matches the outer diameter of the bottom of the wind turbine tower.
In the first embodiment of the present invention, as shown in fig. 3, a first groove is provided at the first end of the outer arc, and a first protrusion matching with the first groove is provided at the second end of the outer arc; the first end part of the inner arc is provided with a second groove, and the second end part of the inner arc is provided with a second protrusion matched with the second groove. Through the first protruding embedding setting with outer arc 51 in the first recess that adjacent portion of embracing corresponds outer arc 51 to wear to establish the lateral wall and the first protruding of first recess through the bolt, realize the outer arc 51 that the adjacent portion of embracing of fixed connection corresponds. The second protrusion of the inner arc 52 is embedded into the second groove of the adjacent clasping portion corresponding to the inner arc 52, and the side wall of the second groove and the second protrusion are penetrated through by a bolt, so that the inner arc 52 corresponding to the adjacent clasping portion is fixedly connected.
As shown in fig. 8, in the second embodiment of the present invention, the end portions of the outer arc and the inner arc may be provided with the hanging lugs, respectively, and the adjacent clasping portions may be fixedly connected by inserting the corresponding hanging lugs through bolts.
The buoy 4 has a hollow closed structure, and is fixedly connected with the clasping device 5, so that the fan 1 vertically floats in the sea, and the blades 12 of the fan are located above the sea surface. The total water discharge of the plurality of buoys 4 is more than 30 percent of the total weight of the fan 1, the buoys 4 and the enclasping device 5. The flotation pontoon 4 contains flotation pontoon body and flotation pontoon lid, and the flotation pontoon body is equipped with the opening, through the flotation pontoon lid seals the opening. In the first embodiment of the present invention, as shown in fig. 5 and 6, the buoyancy device of the present invention includes 4 to 8 buoys 4. A plurality of floating cylinders 4 are uniformly fixed at the periphery of the clasping device in equal height. The length direction of each buoy 4 is parallel to the central axis of the tower 11, and each buoy 4 is fixedly connected with all the clasping devices 5. The buoy 4 is made of rubber or steel. When the buoy 4 is made of rubber, the buoy 4 can be fixedly connected with the clasping device 5 in a binding mode. When the buoy 4 is made of steel, the buoy 4 and the holding device 5 are fixedly connected in a welding mode.
In the invention, the fixed connection between the buoy 4 and the tower barrel 11 is realized through the clasping device 5, and the lifting load of the buoy 4 to the tower barrel is transferred. The floating force is provided for the fan 1 during the whole transportation process of the fan 1 through the buoys 4.
The first end of the hauling rope is fixedly connected with the enclasping device 5, the second end of the hauling rope is fixedly connected with the tug, and the tug wets the draught fan 1 through the tug. The wet towing in the invention means that the fan 1 is in a semi-submerged state, namely, the blades 12 of the fan are positioned above the water surface, and the bottom of the tower of the fan is positioned below the water surface.
The invention discloses an integral transportation method of an offshore wind turbine, which is realized by adopting a buoyancy device for integral transportation of the offshore wind turbine, and as shown in figure 7, the method comprises the following steps:
s1, completing the integral assembly of the fan 1 in a waterless dock, and keeping the fan 1 in an upright state through hoisting equipment in the assembly process;
s2, fixedly sleeving a plurality of holding devices 5 on the outer wall from the bottom to the middle of the tower cylinder along the axial direction of the fan tower cylinder, and uniformly and fixedly arranging a plurality of buoys 4 on the periphery of the holding devices to enable the fan 1, the holding devices 5 and the buoys 4 to form a combined structure;
s3, injecting water into the dock, floating the combined structure through buoyancy generated by the buoy 4, and keeping the fan 1 in a positive floating posture through hoisting equipment;
s4, injecting water or a balancing weight with the weight of G2 into the buoy 4 to balance the buoy 4, so that the floating center of the combined structure is positioned above the gravity center, and the blades 12 of the fan are positioned above the sea surface; according to knowledge of ship and ocean engineering principles, when the center of gravity is below the floating center, the combined structure has natural stability, namely the combined structure can automatically recover to a vertical positive floating state after being inclined at a small angle;
the weight G2 satisfies: h ═ G1 × H1+ G2 × H2)/(G1+ G2);
g1 is the weight of the composite structure before the buoy 4 is weighted, H1 is the height of the center of gravity of the composite structure before the buoy 4 is weighted, H2 is the height of the center of gravity of the balancing weight, and H is the height of the center of gravity of the composite structure after the buoy 4 is weighted.
S5, connecting the enclasping device 5 with the tugboat through a traction rope, and removing the hoisting equipment; vertically and wet-dragging the combined structure to a specified position;
s6, fixedly connecting the offshore large-scale floating crane with the tower barrel 11, keeping the fan 1 in a vertical state, emptying the buoy 4, and dismantling the holding device 5 on the tower barrel 11; and hoisting the fan 1.
Taking 500MW offshore wind farm installation as an example, assuming that the distance between the wind farm and the shore is 50km, the single machine capacity of the fan 1 is 5MW, the complete machine assembly time of the fan 1 at the dock is about 1/day, each large transport ship 2 can load 3 fans 1 each time, the time of going to and from the dock and the wind farm is about 1 day/time, and the time of performing complete machine in-place installation at each machine position by adopting a large floating crane is about 1/day.
If the traditional whole machine installation method is adopted, 1 fan 1 is installed on average every day through a large floating crane, then a waiting period of 0.67 days exists, and the installation time of the fan 1 of the whole wind power plant is about 167 days.
If the buoyancy device and the method for the integral transportation of the offshore wind turbine are adopted, the large-scale floating crane can be moved to the next installation site after 1 wind turbine 1 is installed on average every day, no waiting period exists in the period, and the installation time of the wind turbine 1 of the whole wind power plant is about 100 days. It can be seen that the present invention can save 40% of installation time over conventional installation methods.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. The utility model provides a buoyancy device of whole transportation of offshore wind turbine which characterized in that contains:
the holding devices are arranged along the axial direction of the tower drum of the fan, and the outer wall of the tower drum is fixedly sleeved with the holding devices;
the same flotation pontoon of a plurality of, the flotation pontoon has hollow enclosed construction, and its fixed connection sets up the periphery of enclasping device is used for to the fan provides buoyancy.
2. The offshore wind turbine integrated transportation buoyancy device of claim 1, further comprising:
the first ends of the hauling ropes are fixedly connected with the enclasping device, and the second ends of the hauling ropes are fixedly connected with the tug, so that the tug can wet the draught fan.
3. The marine wind turbine integral transportation buoyant apparatus according to claim 1, wherein the clasping means comprises: the plurality of holding parts are fixedly connected in sequence along the circumferential direction of the fan tower cylinder to form an annular structure matched with the tower cylinder, and the central shaft of the annular structure is superposed with the central shaft of the tower cylinder.
4. The marine wind turbine transport integrated buoyancy device of claim 1, wherein the total displacement of the plurality of pontoons is greater than 30% of the total weight of the wind turbine, the pontoons, and the clasping means.
5. The buoyancy device for integral transportation of offshore wind turbines as recited in claim 1, wherein said pontoons are of equal height; the float comprises a float body and a float cover; the buoy body is provided with an opening, and the opening is sealed by the buoy cover; the length direction of the buoy is parallel to the central shaft of the fan tower.
6. The marine wind turbine transport integrated buoyancy device of claim 1, wherein the pontoons are rubber or steel.
7. An integral transportation method of an offshore wind turbine, which is realized by adopting the buoyancy device for integral transportation of the offshore wind turbine as claimed in any one of claims 1 to 6, and is characterized by comprising the following steps:
s1, completing the integral assembly of the fan in a waterless dock, and keeping the fan in an upright state through hoisting equipment in the assembly process;
s2, fixedly sleeving a plurality of holding devices on the outer wall of the tower barrel along the axial direction of the tower barrel; a plurality of floating cylinders are uniformly and fixedly arranged on the periphery of the holding device, so that the fan, the holding device and the floating cylinders form a combined structure;
s3, injecting water into the dock, floating the combined structure through buoyancy generated by the buoy, and keeping the fan in a positive floating posture through a hoisting device;
s4, injecting water with the weight of G2 or a balancing weight into the buoy to balance the buoy, so that the floating center of the combined structure is positioned above the gravity center, and the blades of the fan are positioned above the sea surface;
s5, connecting the holding device and the tugboat through a traction rope, and removing the hoisting equipment; wet-dragging the composite structure to a specified position;
s6, fixedly connecting the large offshore floating crane with the tower drum, keeping the fan in an upright state, emptying the buoy, and detaching the holding device on the tower drum; and (5) hoisting the fan.
8. The method for transporting offshore wind turbines as set forth in claim 7, wherein in step S2, said plurality of clasping means are installed on the outer wall from the bottom to the middle of the tower.
9. The method for transporting an offshore wind turbine as a whole as set forth in claim 7, wherein the weight G2 in the step S4 satisfies: h ═ G1 × H1+ G2 × H2)/(G1+ G2); wherein G1 is before the flotation pontoon counter weight the weight of integrated configuration, H1 is before the flotation pontoon counter weight the centre of gravity height of integrated configuration, H2 is the centre of gravity height of balancing weight, H is after the flotation pontoon counter weight the centre of gravity height of integrated configuration.
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| WO2022236677A1 (en) * | 2021-05-11 | 2022-11-17 | 天津大学 | Floating-assisting and auxiliary sinking structure of offshore wind power set having suction bucket foundation |
| US20240003110A1 (en) * | 2021-05-11 | 2024-01-04 | Tianjin University | Auxiliary structure for floating and sinking a whole offshore wind turbine with suction bucket foundation(s) |
| US11891768B2 (en) * | 2021-05-11 | 2024-02-06 | Tianjin University | Auxiliary structure for floating and sinking a whole offshore wind turbine with suction bucket foundation(s) |
| CN113978622A (en) * | 2021-06-16 | 2022-01-28 | 丁红岩 | Offshore multi-cylinder jacket foundation transportation method and integrated transport ship |
| CN113978622B (en) * | 2021-06-16 | 2024-06-04 | 丁红岩 | Offshore multi-barrel jacket foundation transportation method and integrated transportation ship |
| CN114030567A (en) * | 2021-11-15 | 2022-02-11 | 鲍韵清 | Floating transportation and installation system for offshore wind turbine |
| WO2024122186A1 (en) * | 2022-12-09 | 2024-06-13 | 株式会社ブリヂストン | Wind power generation device |
| CN116588842A (en) * | 2023-04-28 | 2023-08-15 | 广东精铟海洋工程股份有限公司 | Marine fan integral hoisting equipment |
| CN117927430A (en) * | 2024-02-05 | 2024-04-26 | 中国船舶集团风电发展有限公司 | Vertical storage and transportation device and method for tower barrel of offshore wind generating set |
| CN117927430B (en) * | 2024-02-05 | 2024-07-12 | 中国船舶集团风电发展有限公司 | Vertical storage and transportation device and method for tower barrel of offshore wind generating set |
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Application publication date: 20200609 |