A floating wind turbine foundation launching method based on crane vessel and barge

Abstract

The present invention relates to a method for launching a floating wind turbine foundation based on a crane ship and a barge. The method involves special equipment including three crane ships, a barge, a module vehicle, and a support. The two front columns of the floating wind turbine foundation are lifted and moved by the two front crane ships. The rear columns are first placed on the barge and then pulled into the water by the crane ship. The connection between the hooks and the columns is then released to complete the launching of the floating wind turbine foundation. The floating wind turbine foundation launching method of the present invention is implemented based on crane ships and barges. It does not require the use of a semi-submersible barge to cooperate with the launching. The ship machinery equipment used has low requirements for the water depth of the dock. At the same time, the dock does not need to deploy large equipment such as cranes, and has low requirements for the dock's bearing capacity.

Description

Technical Field

[0001] The present invention relates to power generation equipment, and in particular to a method for launching a floating wind turbine foundation based on a crane ship and a barge. Background Art

[0002] Currently, floating wind turbine foundations can be launched either in a dock or at a pier. Dock launching involves constructing the foundation in a dock and then filling the dock with water to float it. Pier launching involves constructing the foundation on a slipway, transferring it to a pier, and then lowering it into the water using various means.

[0003] As the installed capacity of floating wind turbines gradually increases, the size of the floating wind turbine foundations is also getting larger. If the dock launching method is adopted, it must be manufactured in a large dock of suitable size. However, such docks are too rare and the usage fees are high, which is unaffordable for floating wind power technology, which is very sensitive to economic efficiency.

[0004] Launching from a dock can effectively solve the problems of large docks being difficult to obtain and expensive. However, due to the limitations of the bearing capacity and water depth conditions at the dock front, the dock launching construction method must be highly adaptable. This patent proposes a floating wind turbine foundation launching method that uses a crane ship and a barge to complete the launching operation. It does not require the participation of heavy land-based equipment or semi-submersible barges with high water depth requirements. This solves the problem of difficulty in launching floating wind turbine foundations at docks with low bearing capacity and shallow water depth at the dock front. Summary of the Invention

[0005] The present invention aims to overcome the shortcomings of the prior art by providing a method for launching a floating wind turbine foundation. This method is designed to enable smooth launching at piers with low load-bearing capacity and shallow water depths, without requiring the involvement of large onshore equipment or semi-submersible vessels.

[0006] In order to achieve the above-mentioned invention purpose, the technical solution provided by the present invention is as follows:

[0007] A method for launching a floating wind turbine foundation using a crane vessel and a barge, wherein the floating wind turbine foundation comprises columns and struts, wherein three columns are arranged in a triangle to form a three-column foundation, and the columns are connected by struts. The columns include two front columns and one rear column. The method comprises the following steps:

[0008] The first step is to prepare special equipment for launching, which includes three crane ships, a barge, module vehicles and supports;

[0009] The second step is to place the floating wind turbine foundation on the dock. The bottoms of the two front columns and one rear column of the floating wind turbine foundation are supported by the supports. Multiple module vehicles are prepared around the supports. Two front crane ships are arranged parallel to and facing the dock. One rear crane ship is sideways to the dock, with its bow facing the front crane ship. The barge is sideways to the dock, with its stern facing the front crane ship.

[0010] The third step is to drive the module vehicles to the bottom of the corresponding supports. Multiple module vehicles are used to lift the floating wind turbine foundation and the supports off the ground, and then transport the floating wind turbine foundation to the front of the wharf. The position of the floating wind turbine foundation is adjusted so that the two front columns of the floating wind turbine foundation are directly under the front hooks of the two front crane ships, and the front hooks and front columns are connected respectively.

[0011] Step 4: Slowly lift the front hooks of the two crane ships at the same time until the module car at the bottom of the front column is no longer under stress. After the front column is completely separated from the support, remove the module car and support under the front column.

[0012] Step 5: Synchronously move the two front crane vessels and the module vehicle at the bottom of the rear column toward the water surface outside the dock. When the two front columns are above the water surface and the rear column is at the front edge of the dock, stop moving the front crane vessels and the module vehicle at the bottom of the rear column.

[0013] Step 6: Move the barge along the front edge of the pier to the bottom of the floating wind turbine foundation so that the center of the barge deck is in front of the rear column. Adjust the ballast water of the barge so that the barge deck is flush with the pier.

[0014] Step 7: The two front crane vessels and the module vehicle at the bottom of the rear column continue to move forward at the same speed, so that the floating wind turbine foundation slowly moves forward horizontally to the barge deck and continues to move to a suitable position, which is convenient for the rear hook to connect with the rear column. At this time, the front crane vessel and the module vehicle stop moving;

[0015] Step 8: The rear crane moves along the front edge of the wharf toward the rear column until the rear hook of the rear crane is directly above the center of the rear column, then stops moving, lowers the rear hook, and connects the rear hook to the rear column.

[0016] Step 9: The rear crane lifts the rear columns until the module car at the bottom of the rear columns is no longer under the pressure of the floating wind turbine foundation. The barge retreats along the front edge of the pier to its initial position, leaving no obstacles on the water surface below the two front columns and the rear columns.

[0017] In the tenth step, the rear hook of the rear crane ship and the front hooks of the two front crane ships slowly descend at the same speed until the bottom of the floating wind turbine foundation enters the water and floats completely. The connection between the hooks and the columns is released respectively, and the launching of the floating wind turbine foundation is completed.

[0018] Furthermore, three supports are arranged under each column, six front supports are arranged under the two front columns, and three rear supports are arranged under the one rear column.

[0019] Furthermore, the support is a stool-like structure with legs, and a lifting space for accommodating the module vehicle to enter is provided at the bottom of the support.

[0020] Furthermore, the support includes two parallel long sides and two parallel short sides, a plurality of supporting legs are respectively provided on the two long sides, and the short sides are the entrance and exit of the module vehicle.

[0021] Furthermore, the three crane vessels have the same model and specifications, and the lifting weight is also the same. As the three columns have the same specifications, the general floating wind turbine foundation is an equilateral triangle structure, so the three may better achieve balance during lifting.

[0022] Furthermore, the front hook of the front crane ship is connected to the front column by a sling, and a lifting ring is provided on the top of the front column. The rear hook of the rear crane ship is connected to the rear column by a sling, and a lifting ring is provided on the top of the rear column.

[0023] Based on the above technical solution, the method for launching a floating wind turbine foundation of the present invention has achieved the following technical effects through practical application:

[0024] 1. The launching method of a floating wind turbine foundation of the present invention is implemented based on a crane ship and a barge, and does not require a semi-submersible barge for launching. The ship machinery equipment used has low requirements for the water depth of the dock. At the same time, the dock does not need to be equipped with large equipment such as cranes, and has low requirements for the bearing capacity of the dock. Since the ship types (crane ship and barge) used have a shallow draft, it is not easy for the ship to touch the bottom and be damaged due to the load of the floating wind turbine foundation. The use of barge transfer can provide space for the crane ship to be arranged for the lifting of the rear column of the floating wind turbine foundation, simplifying the lifting process of the rear column.

[0025] 2. The launching method of the floating wind turbine foundation of the present invention does not require the use of a large slipway, a large crane ship, a large semi-submersible barge and a large crane during operation. Instead, a relatively small crane ship and a barge crane are used to realize the launching operation of the large floating wind turbine foundation. There are many ship machinery equipments to choose from, which is not restricted by ship machinery equipment and significantly reduces costs.

[0026] 3. The present invention uses three crane ships to respectively lift the three columns of the large floating wind turbine foundation to complete the launching of the floating wind turbine foundation. The floating wind turbine foundation is subjected to reasonable force and is not prone to structural damage.

[0027] 4. The bottom space of the support of the present invention can be used for module vehicles to enter, exit and lift, which greatly simplifies the land transportation operation of the large floating wind turbine foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional schematic diagram of the arrangement of a launching method of a floating wind turbine foundation based on a crane vessel and a barge according to the present invention.

[0029] Figure 2 It is a side view schematic diagram of the arrangement of a launching method of a floating wind turbine foundation based on a crane vessel and a barge according to the present invention.

[0030] Figure 3 It is a three-dimensional schematic diagram of the initial hoisting in a launching method of a floating wind turbine foundation based on a crane vessel and a barge according to the present invention.

[0031] Figure 4 It is a side view schematic diagram of the initial hoisting in a launching method of a floating wind turbine foundation based on a crane vessel and a barge according to the present invention.

[0032] Figure 5 It is a three-dimensional schematic diagram of a method for launching a floating wind turbine foundation based on a crane vessel and a barge according to the present invention when the front column is hoisted.

[0033] Figure 6 It is a side view schematic diagram of a method for launching a floating wind turbine foundation based on a crane vessel and a barge according to the present invention when the front column is hoisted.

[0034] Figure 7 It is a three-dimensional schematic diagram of a launching method of a floating wind turbine foundation based on a crane vessel and a barge according to the present invention, when the front column is on the water surface and the rear column is close to the front edge of the dock.

[0035] Figure 8 It is a side view schematic diagram of a launching method of a floating wind turbine foundation based on a crane vessel and a barge according to the present invention, when the front column is on the water surface and the rear column is close to the front edge of the dock.

[0036] Figure 9 It is a three-dimensional schematic diagram of a launching method of a floating wind turbine foundation based on a crane vessel and a barge according to the present invention when the center of the barge deck is located in front of the rear column.

[0037] Figure 10 It is a side view schematic diagram of a launching method of a floating wind turbine foundation based on a crane vessel and a barge according to the present invention when the center of the barge deck is located in front of the rear column.

[0038] Figure 11 It is a three-dimensional schematic diagram of a method for launching a floating wind turbine foundation based on a crane vessel and a barge according to the present invention when the rear column is moved to the barge.

[0039] Figure 12 It is a side view schematic diagram of a launching method of a floating wind turbine foundation based on a crane vessel and a barge according to the present invention when the rear column is moved to the barge.

[0040] Figure 13 It is a three-dimensional schematic diagram of a method for launching a floating wind turbine foundation based on a crane vessel and a barge according to the present invention, when the rear hook of the rear crane vessel moves to the rear column.

[0041] Figure 14 It is a side view schematic diagram of a method for launching a floating wind turbine foundation based on a crane vessel and a barge according to the present invention when the rear hook of the rear crane vessel moves to the rear column.

[0042] Figure 15 The present invention is a three-dimensional schematic diagram of a method for launching a floating wind turbine foundation based on a crane vessel and a barge, in which the rear hook of the rear crane vessel lifts the rear column and the barge moves away.

[0043] Figure 16 The present invention is a side view schematic diagram of a method for launching a floating wind turbine foundation based on a crane vessel and a barge, in which the rear hook of the rear crane vessel lifts the rear column and the barge moves away.

[0044] Figure 17 It is a stereoscopic schematic diagram of a launching method of a floating wind turbine foundation based on a crane ship and a barge according to the present invention, when a front hook of a front crane ship releases a front column and a rear hook of a rear crane ship releases a rear column.

[0045] Figure 18 The present invention is a side view schematic diagram of a method for launching a floating wind turbine foundation based on a crane ship and a barge, in which a front hook of a front crane ship releases a front column and a rear hook of a rear crane ship releases a rear column.

[0046] Figure 19 It is a structural schematic diagram of a support in a launching method of a floating wind turbine foundation based on a crane vessel and a barge according to the present invention.

[0047] Figure 20 The present invention is a schematic diagram of the arrangement of supports and module vehicles in a method for launching a floating wind turbine foundation based on a crane vessel and a barge.

[0048] Among them, 1- floating wind turbine foundation 2- dock 3- water 4- front support 5- rear support 6- front module car 7- rear module car 8- front crane 81- front hook 9- rear crane 91- rear hook 10- barge 11- front column 12- rear column DETAILED DESCRIPTION

[0049] Below, we further describe in detail the launching method of the floating wind turbine foundation of the present invention in conjunction with the accompanying drawings and specific embodiments, so as to more clearly understand its system composition and working mode. However, this does not limit the scope of protection of the patent of the present invention.

[0050] At the base of the offshore wind turbine is a floating foundation, composed of columns and struts. Three columns are arranged in a triangle, forming a three-column foundation, and the columns are connected by struts. For purposes of distinction, the three columns are referred to as two front columns and one rear column. For ease of manufacturing and transportation, floating wind turbine foundations are typically constructed in an equilateral triangle, allowing for better balance during hoisting.

[0051] The present invention is a method for launching a floating wind turbine foundation. The method is based on the cooperation of a crane ship and a barge to complete the launching operation. The method includes the following steps:

[0052] The first step is to prepare specialized launching equipment, which includes three crane vessels, a barge, several module carts, and supports. The rated load of the module carts is determined by the number of crane vessels and the weight of the floating wind turbine foundation, with the number of cranes and supports corresponding. The barge will temporarily support the rear columns, providing space for the subsequent crane vessel to lift them. The selection of the barge should consider deck size and load capacity. The barge with the appropriate deck size and load capacity should be selected based on the size and weight of the floating wind turbine foundation. The three crane vessels should be of the same model and specifications, with the same lifting capacity. This ensures a balanced lifting process, as the three columns are of the same specifications.

[0053] In the second step, the layout of each ship and machinery equipment before the launching operation is as follows: the floating wind turbine foundation is supported by the support and placed on the dock, and each module vehicle is prepared around the corresponding column. The two front crane ships are leaning against the front edge of the dock and arranged toward the front edge of the dock, and the distance between the two front hooks is the same as the distance between the front columns. The rear crane ship is leaning against the front edge of the dock, with its bow facing the direction of the front crane ship, and the distance between it and the front crane ship is determined according to the safety distance so that the two ships do not interfere with each other; the barge is leaning against the front edge of the dock, with its stern facing the front crane ship, and the distance between it and the front crane ship is determined according to the safety distance so that the two ships do not interfere with each other. By placing the floating wind turbine foundation on the dock, the bottoms of the two front columns and one rear column of the floating wind turbine foundation are supported by the support, and multiple module vehicles are prepared around the support. The two front crane ships are leaning against the front edge of the dock in parallel and arranged toward the dock, and one rear crane ship is leaning against the front edge of the dock with its bow facing the front crane ship. The barge is leaning against the front edge of the dock with its stern facing the front crane ship.

[0054] The third step is to drive the module vehicles to the bottom of the corresponding supports. Multiple module vehicles are used to lift the floating wind turbine foundation and the supports off the ground, and then transport the floating wind turbine foundation to the front of the wharf. The position of the floating wind turbine foundation is adjusted so that the two front columns of the floating wind turbine foundation are directly under the front hooks of the two front crane ships, and the front hooks and front columns are connected respectively.

[0055] Step 4: Slowly lift the front hooks of the two crane ships at the same time until the module car at the bottom of the front column is no longer under stress. After the front column is completely separated from the support, remove the module car and support under the front column.

[0056] Step 5: Synchronously move the two front crane vessels and the module vehicle at the bottom of the rear column toward the water surface outside the dock. When the two front columns are above the water surface and the rear column is at the front edge of the dock, stop moving the front crane vessels and the module vehicle at the bottom of the rear column.

[0057] Step 6: Move the barge along the front edge of the pier to the bottom of the floating wind turbine foundation so that the center of the barge deck is in front of the rear column. Adjust the ballast water of the barge so that the barge deck is flush with the pier.

[0058] Step 7: The two front crane vessels and the module vehicle at the bottom of the rear column continue to move forward at the same speed, so that the floating wind turbine foundation slowly moves forward horizontally to the barge deck and continues to move to a suitable position, which is convenient for the rear hook to connect with the rear column. At this time, the front crane vessel and the module vehicle stop moving;

[0059] Step 8: The rear crane moves along the front edge of the wharf toward the rear column until the rear hook of the rear crane is directly above the center of the rear column, then stops moving, lowers the rear hook, and connects the rear hook to the rear column.

[0060] Step 9: The rear crane lifts the rear columns until the module car at the bottom of the rear columns is no longer under the pressure of the floating wind turbine foundation. The barge retreats along the front edge of the pier to its initial position, leaving no obstacles on the water surface below the two front columns and the rear columns.

[0061] In the tenth step, the rear hook of the rear crane ship and the front hooks of the two front crane ships slowly descend at the same speed until the bottom of the floating wind turbine foundation enters the water and floats completely. The connection between the hooks and the columns is released respectively, and the launching of the floating wind turbine foundation is completed.

[0062] In order to better transport the overall floating wind turbine foundation, three supports are arranged under each column, six front supports are arranged under the two front columns, and three rear supports are arranged under one rear column. Figure 20 shown.

[0063] like Figure 19 As shown, the support is a stool-like structure with legs, and a lifting space is provided at the bottom of the support to accommodate the module vehicle. The support includes two parallel long sides and two parallel short sides, with multiple legs provided on each of the two long sides, and the short sides are the entrance and exit of the module vehicle.

[0064] Example 1

[0065] In the floating wind turbine foundation launching method of this embodiment, the floating wind turbine foundation 1 is launched into the water 3 from the dock 2 through special preparation equipment. The special equipment includes a front support 4, a rear support 5, a front module vehicle 6, a rear module vehicle 7, a front crane ship 8, a rear crane ship 9 and a barge 10.

[0066] The floating wind turbine foundation 1 is a three-column foundation. It consists of columns and struts, with the columns divided into front columns 11 and rear columns 12. The columns have a diameter of 10-25m and a height of 20-35m. The three columns are arranged in a triangle, with a center-to-center distance of 80-280m. The columns are connected by struts, and the foundation weighs over 3,000 tons when launched. For a certain model of floating wind turbine foundation 1, the three columns are of the same specifications, but are divided into two front columns 11 and one rear column 12 for ease of handling. The columns have a diameter of 15m and a height of 30m. The three columns are arranged in an equilateral triangle, with a center-to-center distance of 180m. The columns are connected by struts, and the foundation weighs 4,500 tons when launched.

[0067] There are multiple supports under each column to support the floating wind turbine foundation 1. Specifically, the support for supporting the front column 11 is the front support 4, and the support for supporting the rear column 12 is the rear support 5. The front support and the rear support are as follows: Figure 19 As shown, the support dimensions are determined based on the dimensions of the module cart 4 and the columns. The launching of the floating wind turbine foundation 1 takes place on pier 2 and water 3, with the side of pier 2 closest to water 3 being the pier's front edge. For the 4500t floating wind turbine foundation, the selected supports are 2m high, 10m long, and 4.5m wide. Corresponding to the supports are six front module carts 6 and three rear module carts 7, each with a rated load of 1000t.

[0068] The large-scale equipment used in this embodiment comprises three crane vessels, two front crane vessels 8 and one rear crane vessel 9. The front crane vessels 8 have front hooks 81, while the rear crane vessel 9 has rear hooks 91. Each crane vessel has a lifting capacity of 4,000 tons. There is also one barge 7, which is 130 meters long, 40 meters wide, and has a load capacity of 5,000 tons.

[0069] like Figure 20 As shown, during operation, the modular vehicle drives under the corresponding support and lifts the support and floating wind turbine foundation 1 off the ground. The modular vehicle is then controlled to move in various directions to transport the floating wind turbine foundation 1. The modular vehicle is divided into a front modular vehicle 6 and a rear modular vehicle 7. The front modular vehicle 6 is used to lift the front column 11 and front support 4, while the rear modular vehicle 7 is used to lift the rear column 12 and rear support 7.

[0070] like Figure 1 and Figure 2As shown, before launching, the various ship machinery and equipment are arranged as follows: the floating wind turbine foundation 1 is supported by a support and placed on the dock, and each module vehicle is prepared around the corresponding column; the two front crane ships 8 are leaning against the front edge of the dock and arranged towards the front edge of the dock, with the two front hooks 81 spaced 180m apart; the rear crane ship 9 is leaning against the front edge of the dock 2, with its bow facing the direction of the front crane ship, and the distance between it and the front crane ship is 50m; the barge 10 is leaning against the front edge of the dock, with its stern facing the front crane ship, and the distance between it and the front crane ship is 15m.

[0071] The launching process of the floating wind turbine foundation 1 in this embodiment includes:

[0072] like Figure 3 and Figure 4 As shown, the front module vehicle 6 and the rear module vehicle 7 drive into the bottom of the front support 4 and the rear support 5 respectively, and the module vehicle lifts up to lift the floating wind turbine foundation 1 and the support off the ground, and transports the floating wind turbine foundation 1 to the front edge of the wharf; the position of the floating wind turbine foundation 1 is adjusted so that the two front columns 11 are located directly below the front hook 81, and the front hook 81 is lowered to connect the front hook 81 and the front column 11.

[0073] like Figure 5 and Figure 6 As shown, the two front hooks 81 of the two front crane ships 8 are slowly lifted at the same time until the front module car 6 is no longer under the pressure of the floating wind turbine foundation. At this time, the front column 11 has completely separated from the front support 4, and then the front module car 6 and the front support 4 under the front column 11 are evacuated.

[0074] like Figure 7 and Figure 8 As shown, the rear module vehicle 7 and the two front crane ships 8 move forward synchronously at the same speed. forward Movement refers to movement towards the outside of the dock, that is, towards the water surface. The floating wind turbine foundation 1 is slowly moved forward horizontally. When the front column 11 is located above the water 3 and the rear column 12 is located at the front of the dock 2, the front crane vessel 8 and the rear module vehicle 7 stop moving.

[0075] like Figure 9 and Figure 10 As shown, the barge 10 moves along the front edge of the pier 2 toward the bottom of the foundation until the center of the deck of the barge 10 is located in front of the rear column 12 and stops moving. The ballast water of the barge 7 is adjusted so that the deck of the barge 7 is flush with the pier 2.

[0076] like Figure 11 and Figure 12 As shown, the two front crane vessels 8 and the rear module vehicle 7 continue to move forward at the same speed, so that the floating wind turbine foundation 1 slowly moves forward horizontally to the deck of the barge 10, and continues to move to a suitable position, which is convenient for the rear hook 91 to be connected with the rear column 12. At this time, the front crane vessel 8 and the rear module vehicle 7 stop moving.

[0077] like Figure 13 and Figure 14 As shown, the rear crane vessel 9 moves along the front edge of the pier 2 toward the rear column 12 until the rear hook 91 is located just above the center of the rear column 12 and stops moving. The rear hook 91 is then lowered to connect the rear hook 91 to the rear column 12.

[0078] like Figure 15 and Figure 16 As shown, the rear crane vessel 9 lifts the rear column 12 until the rear module vehicle 7 is no longer subjected to the pressure of the floating wind turbine foundation, and the barge 10 retreats to the initial position along the front edge of the pier 2, so that there is no obstacle on the water surface below the front column 11 and the rear column 12.

[0079] like Figure 17 and Figure 18 As shown, the hooks of the two front crane vessels 8 and the rear crane vessel 9 are slowly lowered at the same speed until the foundation enters the water and floats completely, releasing the hooks from the columns. The floating wind turbine foundation launching method of the present invention eliminates the need for large slipways, large crane vessels, large semi-submersible barges, and large cranes. Instead, relatively small crane vessels and barge cranes are used to launch large floating wind turbine foundations. This allows for a wider range of ship-based machinery and equipment options, eliminating limitations on ship-based machinery and significantly reducing costs.

Claims

1. A method for launching a floating wind turbine foundation based on a crane vessel and a barge, wherein the floating wind turbine foundation is composed of columns and struts, wherein three columns are arranged in a triangle to form a three-column foundation, and the columns are connected by struts. The columns include two front columns and one rear column, and are characterized in that: The method comprises the following steps: The first step is to prepare special equipment for launching, which includes three crane ships, a barge, module vehicles and supports; The second step is to place the floating wind turbine foundation on the dock. The bottoms of the two front columns and one rear column of the floating wind turbine foundation are supported by the supports. Multiple module vehicles are prepared around the supports. Two front crane ships are arranged parallel to and facing the dock. One rear crane ship is sideways to the dock, with its bow facing the front crane ship. The barge is sideways to the dock, with its stern facing the front crane ship. The third step is to drive the module vehicles to the bottom of the corresponding supports. Multiple module vehicles are used to lift the floating wind turbine foundation and the supports off the ground, and then transport the floating wind turbine foundation to the front of the wharf. The position of the floating wind turbine foundation is adjusted so that the two front columns of the floating wind turbine foundation are directly under the front hooks of the two front crane ships, and the front hooks and front columns are connected respectively. Step 4: Slowly lift the front hooks of the two crane ships at the same time until the module car at the bottom of the front column is no longer under stress. After the front column is completely separated from the support, remove the module car and support under the front column. Step 5: Synchronously move the two front crane vessels and the module vehicle at the bottom of the rear column toward the water surface outside the dock. When the two front columns are above the water surface and the rear column is at the front edge of the dock, stop moving the front crane vessels and the module vehicle at the bottom of the rear column. Step 6: Move the barge along the front edge of the pier to the bottom of the floating wind turbine foundation so that the center of the barge deck is in front of the rear column. Adjust the ballast water of the barge so that the barge deck is flush with the pier. Step 7: The two front crane vessels and the module vehicle at the bottom of the rear column continue to move forward at the same speed, so that the floating wind turbine foundation slowly moves forward horizontally to the barge deck and continues to move to a suitable position, which is convenient for the rear hook to connect with the rear column. At this time, the front crane vessel and the module vehicle stop moving; Step 8: The rear crane moves along the front edge of the wharf toward the rear column until the rear hook of the rear crane is directly above the center of the rear column, then stops moving, lowers the rear hook, and connects the rear hook to the rear column. Step 9: The rear crane lifts the rear columns until the module car at the bottom of the rear columns is no longer under the pressure of the floating wind turbine foundation. The barge retreats along the front edge of the pier to its initial position, leaving no obstacles on the water surface below the two front columns and the rear columns. In the tenth step, the rear hook of the rear crane ship and the front hooks of the two front crane ships slowly descend at the same speed until the bottom of the floating wind turbine foundation enters the water and floats completely. The connection between the hooks and the columns is released respectively, and the launching of the floating wind turbine foundation is completed.

2. The method for launching a floating wind turbine foundation based on a crane vessel and a barge according to claim 1, characterized in that: Three supports are arranged under each column, six front supports are arranged under the two front columns, and three rear supports are arranged under one rear column.

3. The method for launching a floating wind turbine foundation based on a crane vessel and a barge according to claim 1 or 2, characterized in that: The support is a stool-like structure with legs, and a lifting space for accommodating a module vehicle to enter is provided at the bottom of the support.

4. The method for launching a floating wind turbine foundation based on a crane vessel and a barge according to claim 3, characterized in that: The support comprises two parallel long sides and two parallel short sides, a plurality of supporting legs are respectively provided on the two long sides, and the short sides are the entrance and exit of the module vehicle.

5. The method for launching a floating wind turbine foundation based on a crane vessel and a barge according to claim 1, characterized in that: The three crane vessels have the same model and specifications and the same lifting capacity.

6. The method for launching a floating wind turbine foundation based on a crane vessel and a barge according to claim 1, characterized in that: The front hook of the front crane ship is connected to the front column by a sling, and a lifting ring is provided on the top of the front column. The rear hook of the rear crane ship is connected to the rear column by a sling, and a lifting ring is provided on the top of the rear column.

Images