Ocean floating type fan complete machine floating unloading system and method

Abstract

The invention provides an offshore floating type fan complete machine floating unloading system and method, the system is used for complete machine floating unloading of a floating type fan on a semi-submersible transport ship, and the system comprises two tugboats; a lifting device is arranged at the stern of each barge, each tugboat is used for being connected with the corresponding barge and driving the two barges to move to the two sides of the floating fan from the port and the starboard of the semi-submersible transport ship, and the lifting device of each barge is used for being connected with and lifting the floating fan on the semi-submersible transport ship. The two tugboats are further used for driving the two barges to move after the floating draught fan is lifted to the floating unloading height so that the floating draught fan can move to the designated position. According to the complete machine floating unloading system, complete machine semi-submersible floating unloading can be carried out on the floating fan with the draft exceeding the submergence depth of the semi-submersible transport ship under the condition that the submergence depth of the semi-submersible transport ship is limited.

Description

Technical Field

[0001] The present invention relates to the technical field of marine transportation, and particularly relates to a floating unloading system and method for a whole floating wind turbine Background Art

[0002] At present, floating wind turbines generally adopt the wet towing method, and are directly towed from the construction site to the installation site by a tugboat for installation. However, this method is not economical, especially not applicable to long-distance ocean transportation. In this case, semi-submersible ship transportation and floating unloading are required, or semi-submersible ship transportation is combined with large floating crane lifting and unloading. However, the use cost of large floating cranes is high, and there are no large floating crane resources in many places. Therefore, when transporting floating wind turbines over long distances, semi-submersible transport ships are generally used to transport and floating unload the whole floating wind turbine. However, the maximum diving depth of a general semi-submersible transport ship is only 12 m or less above the deck, while the draft of some current large floating wind turbines is more than 15 m, and there are also supporting piers for supporting the floating wind turbine on the main deck of the semi-submersible transport ship. The height of the fan supporting piers is generally 2 m. During floating unloading, the draft depth of the floating wind turbine needs to be less than the water depth of the main deck of the semi-submersible ship, and it needs to be completely separated from the fan supporting piers on the main deck and leave a certain safety space. Therefore, the existing floating unloading methods applied to semi-submersible transport ships cannot floating unload such large floating wind turbines. Summary of the Invention

[0003] In view of this, the present invention provides a floating unloading system and method for a whole floating wind turbine, which can realize the floating unloading of the whole large floating wind turbine.

[0004] To solve at least one of the above technical problems, the present invention adopts the following technical solutions:

[0005] In a first aspect, the present invention provides a floating unloading system for a whole floating wind turbine, which is used for floating unloading the whole floating wind turbine on a semi-submersible transport ship, and includes:

[0006] Two tugboats;

[0007] Two barges, each barge is respectively provided with a lifting device at the stern. Each tugboat is used to be respectively connected to its corresponding barge, and drive the two barges to move from the left and right sides of the semi-submersible transport ship to both sides of the floating wind turbine. The lifting device of each barge is used to connect and lift the floating wind turbine on the semi-submersible transport ship. The two tugboats are also used to drive the two barges to move after the floating wind turbine is lifted to the floating unloading height, so that the floating wind turbine moves to the designated position.

[0008] In an embodiment of the present invention, each lifting device respectively includes:

[0009] A lifting bracket, the lifting bracket is provided with a lifting cantilever, and the lifting cantilever extends out of the stern of the barge;

[0010] A driver, the driver is arranged on the lifting boom;

[0011] The connector, the driver is connected to the connector through a steel wire, the driver is used to drive the connector to rise and fall through the steel wire, the connector is used to connect to the floating fan, and the length of the steel wire is adjustable.

[0012] In one embodiment of the present invention, the driver is a hydraulic cylinder.

[0013] In one embodiment of the present invention, the floating unloading system further comprises:

[0014] The barge connecting device is arranged between the two barges and is connected to the two barges respectively.

[0015] In one embodiment of the present invention, the barge connection device is a cable or a connecting rod.

[0016] In one embodiment of the present invention, the floating unloading system further comprises:

[0017] A plurality of wind ropes are arranged between the corresponding barges and the floating wind turbines, and are respectively connected to the corresponding barges and the floating wind turbines.

[0018] A second aspect of the present invention further provides a method for floating unloading an offshore floating wind turbine, which is applied to the floating unloading system described in any of the above embodiments, and the floating unloading method comprises:

[0019] Step S1, adjusting the buoyancy of the floating wind turbine on the semi-submersible transport vessel so that the floating wind turbine reaches the minimum flat draft state after entering the water;

[0020] Step S2, controlling the semi-submersible transport ship to drop anchor at the unloading position, and pressurizing water to the maximum depth of the main deck entering the water;

[0021] Step S3, controlling the two tugboats to connect to their respective corresponding barges, and driving the two barges to move from the port side and starboard side of the semi-submersible transport ship to both sides of the floating wind turbine respectively;

[0022] Step S4, controlling the two barges to connect and synchronously lift the floating wind turbine through their respective corresponding lifting devices, so that the bottom of the floating wind turbine is separated from the wind turbine pier on the semi-submersible transport ship;

[0023] Step S5, controlling the two tugboats to drive the two barges to move, and towing the floating wind turbine out of the semi-submersible transport ship;

[0024] Step S6: When the floating wind turbine reaches the designated position, the two barges are controlled to drop anchor, and the two lifting devices are controlled to descend synchronously, so that the floating wind turbine reaches its own draft position;

[0025] Step S7: disconnect the floating wind turbine from the two lifting devices.

[0026] In an embodiment of the present invention, step S2 further includes:

[0027] Control the semi-submersible transport ship to level, so that the four corners of the deck of the semi-submersible transport ship are horizontal.

[0028] In an embodiment of the present invention, step S4 includes:

[0029] Step S41: Set up a barge connection device between two barges, and connect the two barges respectively through the barge connection device;

[0030] Step S42: Use guy ropes to connect the two barges and the floating wind turbine respectively;

[0031] Step S43: Control the connectors of the two lifting devices to descend, so that the two connectors are respectively connected to the floating wind turbine;

[0032] Step S44: Control the two lifting devices to lift the connectors synchronously, so that the bottom of the floating wind turbine is separated from the wind turbine pier on the semi-submersible transport ship and is at the floating unloading height.

[0033] In an embodiment of the present invention, when the floating wind turbine is at the floating unloading height, there is a safety distance between the floating wind turbine and the wind turbine pier.

[0034] At least one of the above technical solutions of the present invention has the following beneficial effects:

[0035] The whole-machine floating unloading system of the offshore floating wind turbine of the present invention arranges two barges on the starboard and port sides of the semi-submersible transport ship respectively, and sets up lifting devices on the barges. The floating wind turbine on the semi-submersible transport ship is connected and lifted through the lifting devices, so that the draft depth of the floating wind turbine can be less than the maximum draft depth of the main deck of the semi-submersible transport ship. Thus, a tugboat can be further used to drive the barge to move, and the floating wind turbine can be towed out of the semi-submersible transport ship to a designated position. Thereby, the efficiency and applicability are effectively improved, and the cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a top view of the whole-machine floating unloading system of the offshore floating wind turbine in an embodiment of the present invention;

[0037] Figure 2 It is a schematic diagram of the semi-submersible transport ship anchoring in the whole-machine floating unloading system of the offshore floating wind turbine in an embodiment of the present invention;

[0038] Figure 3 It is a front view of the whole-machine floating unloading system of the offshore floating wind turbine in an embodiment of the present invention;

[0039] Figure 4 It is a top view of the barge anchoring in the whole-machine floating unloading system of the offshore floating wind turbine in an embodiment of the present invention;

[0040] Figure 5 The front view of the lifting device in the floating unloading system of the whole floating wind turbine in an embodiment of the present invention;

[0041] Figure 6 The side view of the lifting device in the floating unloading system of the whole floating wind turbine in an embodiment of the present invention;

[0042] Figure 7 The front view of the barge anchoring in the floating unloading system of the whole floating wind turbine in an embodiment of the present invention;

[0043] Figure 8 The flow chart of the floating unloading method of the whole floating wind turbine in an embodiment of the present invention;

[0044] Figure 9 The flow chart of step S4 in the floating unloading method of the whole floating wind turbine in an embodiment of the present invention.

[0045] Reference numerals: 100, semi-submersible transport ship; 101, floating wind turbine; 102, wind turbine pier; 200, tugboat; 300, barge; 310, lifting device; 311, lifting bracket; 312, driver; 313, connector; 400, barge connection device; 500, guy wire. Detailed implementation manners

[0046] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention fall within the scope of protection of the present invention.

[0047] First, a floating unloading system for a large-draft floating wind turbine for a semi-submersible transport ship according to an embodiment of the present invention will be specifically described below with reference to the accompanying drawings.

[0048] As Figures 1 - 3As shown in the figure, the whole-machine floating unloading system of the offshore floating wind turbine according to the embodiment of the present invention can be used for floating and unloading the whole floating wind turbine 101 on the semi-submersible transport ship 100. The floating wind turbine 101 is arranged on the wind turbine pier 102 on the main deck of the semi-submersible transport ship 100. The whole-machine floating unloading system of the present invention may include: two tugboats 200 and two barges 300. Among them, a lifting device 310 is respectively arranged at the stern of each barge 300. Each tugboat 200 is used to be respectively connected to its corresponding barge 300, and drive the two barges 300 to move from the starboard and port sides of the semi-submersible transport ship 100 to both sides of the floating wind turbine 101. The lifting device 310 of each barge 300 is used to connect and lift the floating wind turbine 101 on the semi-submersible transport ship 100. The two tugboats 200 are also used to drive the two barges 300 to move after the floating wind turbine 101 is lifted to the floating unloading height, so that the floating wind turbine 101 is moved to a designated position.

[0049] In this embodiment, after the semi-submersible transport ship 100 arrives at the ship unloading position and anchors, the two tugboats 200 can be respectively connected to their corresponding barges 300, and drive the two barges 300 to move from the starboard and port sides of the semi-submersible transport ship 100 to both sides of the floating wind turbine 101. The lifting devices 310 on the barges 300 are used to connect and lift the floating wind turbine 101 on the semi-submersible transport ship 100 from both sides respectively, so that the bottom of the floating wind turbine 101 is separated from the wind turbine pier 102 on the semi-submersible transport ship 100 and is at the floating unloading height. At this time, the draft depth of the floating wind turbine 101 is less than the maximum draft depth of the main deck of the semi-submersible transport ship 100, and there is a safety distance between the floating wind turbine 101 and the wind turbine pier 102. Then, the two tugboats 200 can be controlled to drive the two barges 300 to move, tow the floating wind turbine 101 out of the semi-submersible transport ship 100, and transport it to a designated position. As Figure 4 shown, after the floating wind turbine 101 is transported to the designated position, the barge 300 can be anchored, and then the lifting device 310 can be controlled to descend synchronously, so that the floating wind turbine 101 reaches its own draft position; finally, the connection between the floating wind turbine 101 and the two lifting devices 310 is disconnected. Thus, there is no need to equip a large floating crane or manufacture a semi-submersible transport ship 100 with a deeper draft depth, effectively improving the efficiency and applicability and reducing the cost. In some other embodiments of the present application, more than two tugboats 200 and barges 300 can also be used for floating unloading operations, so as to reduce the performance requirements for a single tugboat 200 or barge 300. The present application does not limit this.

[0050] As Figure 5 and Figure 6As shown, each lifting device 310 respectively includes: a lifting bracket 311, a driver 312, and a connector 313. Among them, the lifting bracket 311 is provided with a lifting cantilever that extends outside the stern of the barge 300, and the driver 312 is arranged on the lifting cantilever; the driver 312 is connected to the connector 313 through a steel wire, and the driver 312 is used to drive the connector 313 to lift and lower through the steel wire, and the connector 313 is used to connect to the floating wind turbine 101, and the length of the steel wire is adjustable.

[0051] In this embodiment, the driver 312 can drive the connector 313 to lift and lower through the steel wire, thereby lifting the floating wind turbine 101. By arranging the driver 312 on the lifting cantilever of the lifting bracket 311, the lifting height of the lifting device 310 can be increased while improving the connection strength. In addition, the length of the steel wire can be adjusted according to the draft depths of different types of semi-submersible transport ships 100 or floating wind turbines 101, thereby effectively improving the applicability.

[0052] In an embodiment of the present invention, the driver 312 is a hydraulic cylinder. The hydraulic cylinder has a simple structure, stable operation, and high output power, and can safely and stably lift the floating wind turbine 101 in the offshore wind and wave environment.

[0053] As Figure 1 shown, the floating unloading system further includes: a barge connection device that is arranged between two barges 300 and is respectively connected to the two barges 300. The barge connection device is a cable or a hydraulic connecting rod.

[0054] Specifically, after the two barges 300 respectively move from the starboard and port sides of the semi-submersible transport ship 100 to both sides of the floating wind turbine 101, the two barges 300 can be grouped and the barge connection device can be used to connect the two barges 300, thereby restricting the relative displacement between the two barges 300 and absorbing a certain amount of wave loads according to the changes in sea conditions, thus ensuring the stability when lifting or moving the floating wind turbine 101.

[0055] As Figure 7 shown, the floating unloading system further includes: a plurality of guy ropes 500 that are arranged between their respective corresponding barges 300 and the floating wind turbine 101 and are respectively connected to their respective corresponding barges 300 and the floating wind turbine 101. Specifically, after the barges 300 are grouped, the guy ropes 500 can be used to connect the barges 300 and the floating wind turbine 101 respectively, thereby further improving the stability when lifting or moving the floating wind turbine 101.

[0056] In summary, for the floating uninstallation system of the entire floating wind turbine 101 of the present invention, two barges 300 are respectively arranged on the starboard and port sides of the semi-submersible transport ship 100, and a lifting device 310 is provided on the barge 300. The floating wind turbine 101 on the semi-submersible transport ship 100 is connected and lifted by the lifting device 310, so that the draft depth of the floating wind turbine 101 can be less than the maximum draft depth of the main deck of the semi-submersible transport ship 100. Thus, the tugboat 200 can be further used to drive the barge 300 to move, and the floating wind turbine 101 can be towed from the semi-submersible transport ship 100 to the designated position. Thereby, the efficiency and applicability are effectively improved, and the cost is reduced.

[0057] The second aspect of the present invention further provides a method for floating uninstalling an entire floating wind turbine, which can be applied to the floating uninstallation system described in any of the above embodiments, such as Figure 8 shown, the floating uninstallation method includes:

[0058] Step S1, adjust the floating state of the floating wind turbine on the semi-submersible transport ship to make the floating wind turbine reach the minimum even draft state after entering the water.

[0059] In this embodiment, the minimum even draft state refers to the state where the drafts in the front, rear, left, and right directions of the floating wind turbine are equal. The internal or external counterweight system of the floating wind turbine can be adjusted, such as the injection and drainage operation of the ballast water tank, to make its center of gravity and center of buoyancy reach a stable state, so as to ensure that the wind turbine can enter the water smoothly in a predetermined posture during the subsequent floating uninstallation process. By adjusting the floating wind turbine to the minimum even draft state after entering the water, the floating wind turbine can have good floating state control ability, which is convenient for subsequent attitude adjustment, positioning, or transfer operations by the barge or tugboat.

[0060] Step S2, control the semi-submersible transport ship to drop anchor at the ship unloading position and press water to the maximum depth state where the main deck enters the water.

[0061] In this embodiment, by controlling the semi-submersible transport ship to drop anchor at the ship unloading position and press water to the maximum depth state where the main deck enters the water, the stability of the barge when lifting the floating wind turbine can be improved, and at the same time, the height of the subsequent barge for lifting the floating wind turbine can be reduced. Specifically, step S2 may further include:

[0062] Control the semi-submersible transport ship to level, so that the four corners of the deck of the semi-submersible transport ship are horizontal.

[0063] In this embodiment, the ship ballast system can be precisely controlled, that is, the precise injection and drainage adjustment of multiple ballast tanks of the semi-submersible ship can be carried out to eliminate the longitudinal inclination (tilt in the bow and stern directions) or transverse inclination (tilt in the port and starboard directions) caused by loading deviation, wave influence, or hull structure deformation. Thus, the stability and safety of the floating uninstallation operation can be ensured.

[0064] Step S3: Control the two tugboats to connect to their respective barges and drive the two barges to move from the port and starboard sides of the semi-submersible transport ship to both sides of the floating wind turbine.

[0065] Step S4: Control the two barges to connect through their respective lifting devices and synchronously lift the floating wind turbine, so that the bottom of the floating wind turbine is separated from the wind turbine support pier on the semi-submersible transport ship.

[0066] Specifically, as Figure 9 shown, Step S4 may include:

[0067] Step S41: Set up a barge connection device between the two barges and connect the two barges through the barge connection device respectively.

[0068] In this embodiment, after the two barges move from the port and starboard sides of the semi-submersible transport ship to both sides of the floating wind turbine respectively, the two barges can be grouped and connected by the barge connection device, so as to limit the relative displacement between the two barges and absorb a certain amount of wave loads according to the changes in sea conditions, thus ensuring the stability when lifting or moving the floating wind turbine.

[0069] Step S42: Use guy ropes to connect the two barges and the floating wind turbine respectively.

[0070] In this embodiment, after the barges are grouped, guy ropes can be used to connect the barges and the floating wind turbine respectively, so as to further improve the stability when lifting or moving the floating wind turbine.

[0071] Step S43: Control the connectors of the two lifting devices to descend so that the two connectors connect the floating wind turbine respectively.

[0072] Step S44: Control the two lifting devices to synchronously lift the connectors so that the bottom of the floating wind turbine is separated from the wind turbine support pier on the semi-submersible transport ship and is at the floating unloading height.

[0073] In this embodiment, when the bottom of the floating wind turbine is at the floating unloading height, the draft depth of the floating wind turbine is less than the maximum draft depth of the main deck of the semi-submersible transport ship, and there is a safety distance between the floating wind turbine and the wind turbine support pier. Thus, the floating wind turbine can be smoothly towed out from the semi-submersible transport ship.

[0074] Step S5: Control the two tugboats to drive the two barges to move and tow the floating wind turbine out of the semi-submersible transport ship.

[0075] Step S6: When the floating wind turbine reaches the designated position, control the two barges to drop anchor and control the two lifting devices to descend synchronously so that the floating wind turbine reaches its own draft position.

[0076] Step S7: Disconnect the connection between the floating wind turbine and the two lifting devices.

[0077] Unless otherwise defined, technical terms or scientific terms used in the present invention shall have the ordinary meanings as understood by those of ordinary skill in the field to which the present invention pertains. The "first", "second" and similar terms used in the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, terms such as "a" or "an" do not denote a quantity limitation, but rather denote the existence of at least one. The terms "connected" or "coupled" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right" and the like are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship also changes accordingly.

[0078] The above are the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An offshore floating wind turbine complete floating unloading system, characterized in that, For the whole - machine floating unloading of a floating wind turbine on a semi - submersible transport ship, including: Two tugboats; Two barges, each of which is provided with a lifting device at the stern. Each tugboat is used to be connected to its corresponding barge respectively, and drive the two barges to move from the port side and starboard side of the semi - submersible transport ship to both sides of the floating wind turbine respectively. The lifting device of each barge is used to connect and lift the floating wind turbine on the semi - submersible transport ship. The two tugboats are also used to drive the two barges to move after the floating wind turbine is lifted to the floating - unloading height so that the floating wind turbine moves to the designated position.

2. The floating unloading system according to claim 1, wherein Each of the lifting devices respectively includes: A lifting bracket, which is provided with a lifting cantilever, and the lifting cantilever extends out of the stern of the barge; A driver, which is arranged on the lifting cantilever; A connector, the driver is connected to the connector through a steel wire. The driver is used to drive the connector to lift and lower through the steel wire, and the connector is used to connect to the floating wind turbine, and the length of the steel wire is adjustable.

3. The floating unloading system according to claim 2, characterized in that, The driver is a hydraulic cylinder.

4. The floating unloading system according to claim 1, wherein It also includes: A barge connection device, which is arranged between the two barges and is respectively connected to the two barges.

5. The floating unloading system according to claim 4, wherein, The barge connection device is a cable or a connecting rod.

6. The floating unloading system according to claim 1, characterized in that It also includes: A plurality of guy ropes, which are arranged between their corresponding barges and the floating wind turbine respectively, and are respectively connected to their corresponding barges and the floating wind turbine.

7. A method for floating and unloading an entire floating wind turbine at sea, characterized in that, Applied to the floating - unloading system according to any one of claims 1 - 6, the floating - unloading method includes: Step S1: Adjust the floating state of the floating wind turbine on the semi - submersible transport ship to make the floating wind turbine reach the state of the minimum even draft after entering the water; Step S2: Control the semi - submersible transport ship to drop anchor at the ship - unloading position and press water to the state of the maximum depth of the main deck entering the water; Step S3: Control the two tugboats to connect their corresponding barges respectively, and drive the two barges to move from the port side and starboard side of the semi - submersible transport ship to both sides of the floating wind turbine respectively; Step S4: Control the two barges to connect and synchronously lift the floating wind turbine through their corresponding lifting devices, so that the bottom of the floating wind turbine is separated from the wind turbine support pier on the semi - submersible transport ship; Step S5: Control the two tugboats to drive the two barges to move and tow the floating wind turbine out of the semi - submersible transport ship; Step S6: When the floating wind turbine reaches the designated position, control the two barges to drop anchor, and control the two lifting devices to descend synchronously, so that the floating wind turbine reaches its own draft position; Step S7: Disconnect the connection between the floating wind turbine and the two lifting devices.

8. The floating unloading method according to claim 7, characterized in that, The step S2 also includes: Control the semi - submersible transport ship to level, so that the four corners of the deck of the semi - submersible transport ship are horizontal.

9. The floating unloading method according to claim 7, wherein, The step S4 includes: Step S41: Set a barge connection device between the two barges and connect the two barges respectively through the barge connection device; Step S42: Use guy ropes to connect the two barges and the floating wind turbine respectively; Step S43: Control the connectors of the two lifting devices to descend so that the two connectors are respectively connected to the floating wind turbine; Step S44: Control the two lifting devices to lift the connectors synchronously so that the bottom of the floating wind turbine disengages from the wind turbine pier on the semi-submersible transport ship and is at the floating unloading height.

10. The floating unloading method according to claim 9, wherein, When the bottom of the floating wind turbine is at the floating unloading height, there is a safety distance between the floating wind turbine and the wind turbine pier.

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