A Marine Transportation Device and Method for Wind Turbine Tubular Foundations

Abstract

The present invention belongs to the technical field of offshore wind power generation, and discloses an offshore transportation device and method for a wind power cylindrical foundation. Vertically, a limit card restricts the up-and-down movement of the offshore wind power cylindrical foundation relative to the offshore transportation device for the wind power cylindrical foundation in the case of large wind and waves, avoiding accidents where the offshore wind power cylindrical foundation detaches from the offshore transportation device. Through the cavity columns arranged between the partition floating bodies and the strip floating bodies, multiple wind power cylindrical foundations can be transported at one time, and the transportation efficiency is relatively high. Since the partition floating bodies and the strip floating bodies are movably connected and are easily replaced according to actual conditions, the shape selection of the inner partition floating bodies has flexibility, which is convenient for dealing with wind power cylindrical foundations of different shapes and specifications, and improves the resource utilization efficiency. It is suitable for popularization and use in offshore wind farm infrastructure projects.

Description

Technical Field

[0001] The present invention belongs to the technical field of offshore wind power generation, and specifically discloses an offshore transportation device and method for a wind power cylindrical foundation. Background Art

[0002] As a clean and renewable energy source, wind energy has become one of the new energy sources with the fastest development in recent years. Different from onshore wind, offshore wind power is much greater than onshore wind. Offshore wind power is far from the crowd and does not occupy arable land, with huge development space. It is fully capable of playing the role of the main force of green renewable electricity. Vigorously developing offshore wind power has great strategic value. Offshore wind power has been developing rapidly around the world in recent years. The most common foundation structures in the construction of offshore wind turbines are pile foundations, gravity foundations, and cylindrical foundations that have developed rapidly in recent years.

[0003] Due to its advantages such as large stiffness, strong anti-overturning ability, and low overall cost, the cylindrical foundation is widely used in offshore wind farms affected by typhoons and with relatively shallow rock depths. However, the cylindrical foundation is large in size and weight, and the bottom cylindrical skirt bulkhead plates are all thin-walled structures, which cannot directly bear the large weight of the cylindrical foundation. Therefore, it cannot be directly transported on a flat barge and can only be transported by floating. The foundation transportation method for some gravity-type wind turbine foundations with closed structures is direct towage transportation. However, the bottom cylindrical skirt of the offshore wind power cylindrical foundation is an open structure, and its stability and anti-overturning ability during floating are significantly weaker than those of the closed-structure foundation type. This requires large auxiliary equipment to limit the amplitude of its left-right swing and up-down fluctuation. Currently, the commonly used auxiliary floating devices generally limit the movement of the wind turbine foundation relative to the auxiliary floating device in the horizontal plane, and only consider supporting the bottom of the wind turbine foundation in the vertical direction to prevent it from leaking into the sea. However, the situation where the offshore wind power cylindrical foundation moves upward and the floating ship moves downward during strong winds and waves, resulting in the separation of the offshore wind power cylindrical foundation from the floating ship, is not considered, and thus the stable floating transportation of the floating ship for the offshore wind power cylindrical foundation cannot be achieved.

[0004] In addition, the existing auxiliary floating devices can only transport a single offshore wind power cylindrical foundation, and require that the size of the cylindrical foundation transported each time must be the same. Otherwise, the entire offshore transportation device for the wind power cylindrical foundation needs to be redesigned and manufactured, resulting in a great waste of resources and low transportation efficiency. Summary of the Invention

[0005] To solve the problems in the background art, the present invention provides an offshore transportation device for a wind power cylindrical foundation, and the specific technical solution is as follows:

[0006] An offshore transportation device for a wind power cylindrical foundation includes a lifting and limiting mechanism and a floating platform arranged horizontally. The lifting and limiting mechanism includes a lifting rod vertically passing through the floating platform and a limiting clamp horizontally installed.

[0007] The floating transportation platform includes two strip-shaped floating bodies parallel to the transportation direction and a plurality of partition floating bodies arranged in a row in the middle of the two strip-shaped floating bodies in the transportation direction. The joint of each partition floating body and the strip-shaped floating bodies on both sides is movably connected. The spaces between adjacent partition floating bodies and the two strip-shaped floating bodies form a cavity consistent with the cross-section of the wind power cylindrical foundation. The partition floating bodies include outer partition floating bodies at both ends of the row and inner partition floating bodies in the middle of the row. The outer partition floating bodies and the two strip-shaped floating bodies form the outer contour of the transportation device, and the outer contour is in the shape of a bamboo raft or a ship.

[0008] Preferably, the movable connection includes flanges on both sides of the partition floating body and grooves on the strip-shaped floating body that engage with them.

[0009] Preferably, the movable connection includes grooves on both sides of the partition floating body and flanges on the strip-shaped floating body that engage with them.

[0010] Preferably, it further includes a transverse gear and rack transmission pair installed on the partition floating body and the strip-shaped floating body for pushing the partition floating body to slide relative to the strip-shaped floating body.

[0011] Preferably, the cavity is a regular hexagon hole, a square hole or a circular hole.

[0012] Preferably, a vertical gear and rack transmission pair for pushing the lifting rod to move up and down relative to the floating transportation platform is installed on the floating transportation platform and the lifting rod.

[0013] Based on the same inventive concept, the present application also provides a method for transporting a wind power cylindrical foundation at sea, using the above-mentioned wind power cylindrical foundation sea transportation device, which specifically includes the following steps:

[0014] Step 1: Inject gas into the skirt of the wind power cylindrical foundation to drain the water in the skirt compartment, so that the upper surface of the skirt is above the sea level S.

[0015] Step 2: Select the matching strip-shaped floating bodies and partition floating bodies according to the type and number of the wind power cylindrical foundations to be transported. Engage the outer partition floating bodies at the bow of the wind power cylindrical foundation sea transportation device with the strip-shaped floating bodies on both sides respectively. Pair by pair, embed the groups of the wind power cylindrical foundation and the partition floating bodies, and use the limit card to lock the height of the wind power cylindrical foundation until the last wind power cylindrical foundation at the stern of the wind power cylindrical foundation sea transportation device is embedded and closed through the outer partition floating body and the strip-shaped floating body.

[0016] Step 3: Transport the fan hexagonal cylindrical foundation to the predetermined sea area through the wind power cylindrical foundation sea transportation device. Lower multiple lifting rods to touch the seabed for positioning. When it is determined that the flatness of the seabed meets the requirements, release the wind power cylindrical foundation one by one starting from the stern.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0018] Vertically, the up-and-down movement of the offshore wind turbine barrel foundation relative to the offshore transportation device for the wind turbine barrel foundation is restricted by the limit card when the wind and waves are large, avoiding the accident that the offshore wind turbine barrel foundation is separated from the offshore transportation device, and realizing the stable floating transportation of the floating ship for the offshore wind turbine barrel foundation.

[0019] In addition, the technical solution of this application can transport multiple wind turbine barrel foundations at one time through the cavity columns arranged between the partition floating body and the strip floating body, and the transportation efficiency is relatively high. Since the partition floating body and the strip floating body are movably connected and are easy to replace according to actual conditions, the shape selection of the inner partition floating body has flexibility, which is convenient for dealing with wind turbine barrel foundations of different shapes and specifications, and improves the utilization efficiency of resources. Description of the Drawings

[0020] Figure 1 It is an obliquely upward view of the offshore transportation of the wind turbine barrel foundation in the embodiment of the present invention;

[0021] Figure 2 It is a front view of the offshore transportation of the wind turbine barrel foundation in the embodiment of the present invention;

[0022] Figure 3 It is an obliquely downward view of the offshore transportation of the wind turbine barrel foundation in the embodiment of the present invention;

[0023] Figure 4 It is an obliquely upward view of the offshore transportation device for the wind turbine barrel foundation in the embodiment of the present invention;

[0024] Figure 5 It is a schematic diagram of the splicing of various floating bodies in the embodiment of the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the strip floating body in the embodiment of the present invention;

[0026] Figure 7 It is a structural diagram of the horizontal movement and fixation of the end of the strip floating body relative to the partition floating body in the embodiment of the present invention;

[0027] Figure 8 It is a structural diagram of the horizontal movement and fixation of the middle part of the strip floating body relative to the partition floating body in the embodiment of the present invention;

[0028] Figure 9 It is a structural diagram of the inner partition floating body in the embodiment of the present invention;

[0029] Figure 10 It is an assembly diagram of the inner partition floating body and the strip floating body in the embodiment of the present invention;

[0030] Figure 11 It is a structural diagram of the outer partition floating body in the embodiment of the present invention;

[0031] Figure 12Assembly drawing of the outer separated floating body and the strip floating body in the embodiment of the present invention;

[0032] Figure 13 Structural diagram of the lifting limit mechanism in the embodiment of the present invention;

[0033] Figure 14 Schematic diagram of the state where the lifting limit mechanism touches the seabed after reaching the predetermined sea area in the embodiment of the present invention;

[0034] In the figure, S - sea level; T - cylindrical foundation; F - floating transportation platform;

[0035] T.1 - single column, T.2 - cylindrical skirt; F.1 - lifting limit mechanism; F.2 - strip floating body; F.3 - inner separated floating body; F.4 - outer separated floating body;

[0036] F.11 - lifting rod; F.12 - support plate; F.21 - groove; F.22 - horizontal rack; F.23 - strip floating body pin ear; F.24 - through hole for the lifting rod; F.25 - lifting gear; F.31 - inner separated floating body flange; F.32 - inner separated floating body pin ear; F.33 - inner separated floating body translation gear; F.41 - outer separated floating body flange; F.42 - outer separated floating body pin ear; F.43 - outer separated floating body translation gear;

[0037] F.231 - strip floating body pin hole; F.321 - inner separated floating body pin hole; F.421 - outer separated floating body pin hole. Detailed implementation manners

[0038] To make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0039] As Figure 1 shown, the embodiment of the present invention is a modular assembled and fully - fitted offshore wind power cylindrical foundation transportation device, including a cylindrical foundation T and a floating transportation platform F.

[0040] As Figures 1 - 4 shown, the cylindrical foundation T includes a single column T.1 and a cylindrical skirt T.2. The outer contour of the cylindrical skirt T.2 is hexagonal, and the inside is divided into 7 compartments by 12 compartment plates. The bottom of the cylindrical skirt T.2 is an open structure.

[0041] The cylindrical foundation T discharges the water in the chamber of the skirt T.2 by injecting gas into the skirt T.2, creating a liquid level difference inside and outside the chamber, thereby generating buoyancy. The buoyancy generated by the cylindrical foundation T can be greater than the gravity, enabling it to have the self-floating ability. However, the cylindrical foundation T itself does not have the ability to maintain sufficient stability under marine environmental loads such as wind, waves, and currents. The role of the floating platform F in this invention is to provide stability for the cylindrical foundation T against marine environmental loads.

[0042] The floating platform F is composed of a lifting limit mechanism F.1, two strip-shaped floating bodies F.2, and a partition floating body embedded in the strip-shaped floating bodies F.2. The partition floating body can be composed of an inner partition floating body F.3 and an outer partition floating body F.4.

[0043] The cylindrical foundation T floats on the water surface S by inflating. The cylindrical foundation T is seamlessly and fully wrapped by the floating platform F, limited in the longitudinal direction by the inner partition floating body F.3 and the outer partition floating body F.4, and limited in the transverse direction by the two strip-shaped floating bodies F.2, so that the cylindrical foundation T and the floating platform F are combined into a whole.

[0044] As Figure 5 shown, the inner partition floating body F.3 is first embedded and fixed between the two strip-shaped floating bodies F.2. The two cylindrical foundations T are respectively embedded between the two strip-shaped floating bodies F.2 from the left and right sides. The side surface of the inner partition floating body F.3 exactly matches the hexagonal side surface of the cylindrical foundation T. After the cylindrical foundation T is in place, the two hexagonal side surfaces of the cylindrical foundation T are completely attached to the side surface of the inner partition floating body F.3. Then, the two outer partition floating bodies F.4 are respectively embedded between the two strip-shaped floating bodies F.2 from the outside and completely wrap the cylindrical foundation T after being in place. The side surface of the outer partition floating body F.4 exactly matches the hexagonal side surface of the cylindrical foundation T.

[0045] As Figures 6 - 12 shown, the two strip-shaped floating bodies F.2 are two completely identical and symmetrically arranged hull structures. The inner partition floating body F.3 is a symmetric structure, with the left and right sides attached to the inner sides of the strip-shaped floating bodies F.2, and the front and back sides attached to the hexagonal side surfaces of the cylindrical foundation T. The left and right sides of the outer partition floating body F.4 are attached to the inner sides of the strip-shaped floating bodies F.2. Among the front and back sides, the side adjacent to the cylindrical foundation T is attached to the hexagonal side surface of the cylindrical foundation T, and the other side is a straight edge.

[0046] The strip-shaped floating body F.2 is provided with a groove F.21, and the inner partition floating body flanges F.31 extending outward from both sides of the inner partition floating body F.3 and the outer partition floating body flanges F.41 extending outward from both sides of the outer partition floating body F.4 can just be embedded therein and slide within the groove F.21. The strip-shaped floating body F.2 is provided with a horizontal rack F.22, and the inner partition floating body translation gears F.33 installed on the inner partition floating body F.3 and the outer partition floating body translation gears F.43 installed on the outer partition floating body F.4 form a gear-rack transmission pair with the horizontal rack F.22 to drive the sliding of the inner partition floating body F.3 and the outer partition floating body F.4 within the strip-shaped floating body F.2.

[0047] The strip-shaped floating body F.2 is provided with strip-shaped floating body pin ears F.23 and strip-shaped floating body pin holes F.231 are opened thereon. The inner partition floating body F.3 is provided with inner partition floating body pin ears F.32 matching the number of the strip-shaped floating body pin ears F.23, and inner partition floating body pin holes F.321 are opened on the inner partition floating body pin ears F.32. The outer partition floating body F.4 is provided with outer partition floating body pin ear plates F.42 matching the number of the strip-shaped floating body pin ears F.23, and outer partition floating body pin holes F.421 are opened on the outer partition floating body pin ear plates F.42.

[0048] As Figure 10 shown, after the inner partition floating body F.3 is embedded inside the strip-shaped floating body F.2 and moves into place, the strip-shaped floating body pin holes F.231 and the inner partition floating body pin holes F.321 are exactly all aligned, and a pin is passed through between the strip-shaped floating body pin holes F.231 and the inner partition floating body pin holes F.321, so that the inner partition floating body F.3 is limited in all degrees of freedom with respect to the strip-shaped floating body F.2 and forms an integral body.

[0049] As Figure 12 shown, after the outer partition floating body F.4 is embedded inside the strip-shaped floating body F.2 and moves into place, the strip-shaped floating body pin holes F.231 and the outer partition floating body pin holes F.421 are exactly all aligned, and a pin is passed through between the strip-shaped floating body pin holes F.231 and the outer partition floating body pin holes F.421, so that the outer partition floating body F.4 is limited in all degrees of freedom with respect to the strip-shaped floating body F.2 and forms an integral body.

[0050] As Figure 7 and Figure 13 shown, the lifting limit mechanism F.1 is vertically provided with a lifting rod F.11 with a lifting rack, and a support plate F.12 is provided at its bottom. The strip-shaped floating body F.2 is provided with a lifting gear F.25 near the lifting rack. A lifting rod through hole F.24 is vertically opened on the strip-shaped floating body F.2.

[0051] The lifting limit mechanism F.1 passes through the through hole F.24 of the lifting rod, and the lifting gear F.25 and the lifting rack form a gear-rack transmission pair to realize the lifting and lowering of the lifting limit mechanism F.1. When the foundation is in the transportation state as shown in Figure 1 , the lifting limit mechanism F.1 is lifted to a proper position; as shown in Figure 14 , when the foundation reaches the designated position, the lifting limit mechanism F.1 is lowered until the support plate F.12 reaches the seabed and plays a role in supporting and positioning, so as to achieve the purpose of positioning the floating transportation platform F and the cylindrical foundation T.

[0052] Another embodiment of the present invention is a modular assembled fully-fitted offshore wind power cylindrical foundation transportation method, including the following steps:

[0053] Step 1: Inject gas into the skirt of the cylindrical foundation T to discharge the water in the skirt T.2, so that the upper surface of the skirt T.2 is above the sea level S;

[0054] Step 2: Select the matching strip-shaped floating body F.2, inner partition floating body F.3 and outer partition floating body F.4 according to the type and number of the regular hexagonal cylindrical foundation T to be transported. Engage the outer partition floating body F.4 at the bow of the offshore transportation device of the cylindrical foundation T with the strip-shaped floating bodies on both sides thereof, and gradually pair-embed the cylindrical foundation T and the partition floating bodies. Use the limit card to lock the height of the cylindrical foundation T until the last cylindrical foundation T at the stern of the offshore transportation device of the cylindrical foundation T is embedded in the strip-shaped floating body F.2 through the outer partition floating body F.4 and closed;

[0055] Step 3: Transport the fan hexagonal cylindrical foundation T to the predetermined sea area through the modular assembled fully-fitted offshore wind power cylindrical foundation transportation device. Lower the multiple lifting rods F.11 to touch the seabed for positioning. When it is determined that the flatness of the seabed meets the requirements, release the cylindrical foundation T one by one from the stern.

[0056] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A marine transportation device for a wind power cylindrical foundation, comprising a lifting and limiting mechanism and a floating transportation platform arranged horizontally. The lifting and limiting mechanism includes a lifting rod vertically passing through the floating transportation platform and a horizontally installed limiting clamp. A support plate is provided at the bottom of the lifting rod. The floating transportation platform includes two strip-shaped floating bodies parallel to the transportation direction and a plurality of separating floating bodies arranged in a row in the middle of the two strip-shaped floating bodies in the transportation direction. The joint of each separating floating body and the strip-shaped floating bodies on both sides is movably connected. The spacing between adjacent separating floating bodies and the two strip-shaped floating bodies forms a cavity consistent with the cross-section of the wind power cylindrical foundation. The separating floating bodies include outer separating floating bodies at both ends of a row and inner separating floating bodies in the middle of a row. The outer separating floating bodies and the two strip-shaped floating bodies form the outer contour of the transportation device, and the outer contour is in the shape of a bamboo raft or a ship. A vertical gear-rack transmission pair for pushing the lifting rod to move up and down relative to the floating transportation platform is installed on the floating transportation platform and the lifting rod.

2. The offshore transportation device for a wind power tubular foundation according to claim 1, characterized in that: The movable connection includes flanges on both sides of the separating floating body and grooves of the strip-shaped floating body engaged therewith.

3. The offshore transportation device for a wind power tubular foundation according to claim 1, characterized in that: The movable connection includes grooves on both sides of the separating floating body and flanges of the strip-shaped floating body engaged therewith.

4. A kind of off - shore transportation device for wind power tubular foundation as claimed in claim 2 or 3, characterized in that: It further includes a horizontal gear-rack transmission pair installed on the separating floating body and the strip-shaped floating body for pushing the separating floating body to slide relative to the strip-shaped floating body.

5. The offshore transportation device for a wind power cylindrical foundation according to claim 4, characterized in that: The cavity is a regular hexagon hole, a square hole or a round hole.

6. A method for offshore transportation of a wind power tubular foundation, characterized in that, Using a marine transportation device for a wind power cylindrical foundation as described in claim 4, specifically includes the following steps: Step 1: Inject gas into the cylinder skirt of the wind power cylindrical foundation, drain the water in the cylinder skirt cabin, so that the upper surface of the cylinder skirt is above the sea level S. Step 2: Select the matching strip-shaped floating bodies and separating floating bodies according to the type and number of the wind power cylindrical foundations to be transported. Engage the outer separating floating bodies at the bow of the marine transportation device for the wind power cylindrical foundation with the strip-shaped floating bodies on both sides thereof respectively, and gradually pair and embed the wind power cylindrical foundation and the separating floating bodies. Use the limiting clamp to lock the height of the wind power cylindrical foundation until the last wind power cylindrical foundation at the stern of the marine transportation device for the wind power cylindrical foundation is embedded and closed by the outer separating floating body and the strip-shaped floating body. Step 3: Transport the fan hexagonal cylindrical foundation to the predetermined sea area through a modular assembled and fully fitted marine wind power cylindrical foundation transportation device. Lower the multiple lifting rods to touch the seabed for positioning. When it is determined that the flatness of the seabed meets the requirements, release the wind power cylindrical foundations one by one starting from the stern.

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