A deep-water offshore wind power cylinder foundation installation device and method

Abstract

The present invention provides a deep-water offshore wind power cylindrical foundation installation device and method, including a sinking pad, a floating body and a cable assembly, the inner side wall of the sinking pad is provided with a fixed pulley; the floating body includes a K-type floating ship and a U-type floating ship, the K-type floating ship is embedded in the inner contour of the U-type floating ship; the bow and stern of the U-type floating ship are provided with positioning piles, and the outer wall of the U-type floating ship is provided with a clamp; the K-type floating ship and the U-type floating ship are both provided with a hanger; the cable assembly includes an upper pull-up cable and a lower pull-down cable, one end of the upper pull-up cable is connected to the hanger, and the other end is connected to the top of the hexagonal cylindrical foundation; the lower pull-down cable bypasses the fixed pulley, and one end of the lower pull-down cable is connected to a buoy, and the other end is connected to the bottom of the hexagonal cylindrical foundation. The present invention ensures the safety and stability of the hexagonal cylindrical foundation during the sinking process.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power foundation installation, and more specifically, to a deep-water offshore wind power cylinder-type foundation installation device and method. Background Art

[0002] At present, the most widely used foundation structures for offshore wind power are pile foundation structures and gravity foundation structures. However, with the development of geotechnical technology in recent years, the application scope of cylindrical foundation structures in the field of offshore wind power has become more and more extensive. Compared with the traditional pile foundation structure, the cylindrical foundation is constructed by negative pressure sinking. The foundation structure has strong anti-overturning ability and has the function of "one-step" installation of the whole machine. The so-called "one-step" installation means that the foundation structure, tower, and head can be prefabricated and installed on the shore, and then towed to the installation site as a whole and sunk as a whole. This technology greatly simplifies the construction cycle of offshore wind power foundation structures, reduces costs and improves efficiency. At present, some offshore wind farms in shallow waters near the coast in China have adopted cylindrical foundations and "one-step" installation technology, and have achieved good results. However, the cylindrical foundation and its "one-step" installation technology are just in the initial stage. Since the "one-step" installation requires the foundation, tower, and nose to be towed and sunk as a whole, the center of gravity is relatively high, and the sinking speed, tilt angle, and attitude control during the sinking process are very high (the tilt angle generally cannot exceed 0.5%); however, the deep-sea environment is not as shallow as the shallow-sea environment, and its winds and waves are larger and the ocean currents are faster; in addition, since the barrel-type foundation towing vessel (floating vessel) is relatively large, it is usually impossible to achieve a safe, fast, and effective connection from towing to sinking, resulting in many risks and hidden dangers in the process of towing and sinking the barrel-type foundation. Therefore, safe, fast, efficient, and economical installation devices and methods are key technical difficulties in improving the practicality of the barrel-type foundation structure and its "one-step" installation method in the deep-sea environment.

[0003] Therefore, there is an urgent need in the prior art for a technical solution suitable for the installation of a new type of offshore wind power cylindrical foundation, which aims to safely, quickly, efficiently and economically realize the connection work and sinking work of the cylindrical foundation from towing to sinking construction. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides a deep-water offshore wind power cylinder foundation installation device and method.

[0005] To achieve the above object, the present invention is implemented through the following technical solutions:

[0006] A deep-water offshore wind power cylindrical foundation installation device comprises a sinking pad, a floating body and a cable assembly, wherein the inner side wall of the sinking pad is provided with a fixed pulley; the floating body comprises a K-type floating ship and a U-type floating ship, the K-type floating ship is embedded in the inner contour of the U-type floating ship, and the space surrounded by the K-type floating ship and the U-type floating ship is used to place the hexagonal cylindrical foundation to be installed; the bow and stern of the U-type floating ship are provided with positioning piles, and the outer wall of the U-type floating ship is provided with a clamp; the K-type floating ship and the U-type floating ship are both provided with a hanger; the cable assembly comprises an upper pulley and a lower pulley, one end of the upper pulley is connected to the hanger, and the other end is connected to the top of the hexagonal cylindrical foundation; the lower pulley passes around the fixed pulley, and one end of the lower pulley is connected to a buoy, and the other end is connected to the bottom of the hexagonal cylindrical foundation.

[0007] The pull-down cable includes a first pull-down cable and a second pull-down cable which are detachable from each other; in a non-use state, the first pull-down cable is passed around the fixed pulley, and both the head end and the tail end are connected to floats, the head end of the second pull-down cable is connected to the float, and the tail end is connected to the bottom of the hexagonal cylindrical foundation; in a use state, the first pull-down cable is passed around the fixed pulley, and the head end of the first pull-down cable is connected to the float, the tail end of the first pull-down cable is connected as a whole with the head end of the second pull-down cable, and the tail end of the second pull-down cable is connected to the bottom of the hexagonal cylindrical foundation.

[0008] The U-shaped floating vessel is also provided with buckles for clamping the side walls of the hexagonal cylindrical foundation.

[0009] The lower surface of the mat is provided with legs, the upper surface of the mat is provided with columns, and the top of the columns is provided with a top beam.

[0010] The columns form a group of two, and a top beam is arranged on the top of each group of columns.

[0011] The shape of the sinker is "U"-shaped, and the sinker is a steel box structure with a hollow interior. The sinker is also provided with air holes.

[0012] The present invention also provides the following technical solution.

[0013] A method for installing a deepwater offshore wind turbine barrel foundation comprises the following steps:

[0014] S1. Place the hexagonal barrel foundation in the space surrounded by the K-type floating ship and the U-type floating ship, embed the K-type floating ship into the U-type floating ship, and clamp the hexagonal barrel foundation with buckles;

[0015] S2, sink the sinking pad, column and legs as a whole;

[0016] S3. After the legs are inserted into the seabed to stabilize the sinking pad, the K-type floating ship, the U-type floating ship and the hexagonal cylindrical foundation are towed as a whole to the designated location, and the columns are clamped tightly with clamps;

[0017] S4, lower the positioning pile; at this time, the first end of the first pull-down cable floats on the water surface through the buoy, and the end passes through the pulley on the inner wall of the sinking pad and also floats on the water surface through the buoy; the first end of the second pull-down cable also floats on the water surface through the buoy, and the end is connected to the bottom of the hexagonal barrel foundation;

[0018] S5, remove the floating balls at the end of the first pull-down cable and the beginning of the second pull-down cable, and connect the end of the first pull-down cable and the beginning of the second pull-down cable as one to form a cable, i.e., the pull-down cable. The beginning of the pull-down cable passes through the fixed pulley on the inner wall of the sinking mat, and the end is connected to the bottom of the hexagonal barrel foundation;

[0019] S6. Pull up the head end of the pull-down cable to make the hexagonal barrel foundation sink continuously, and pull up the straightening cable to gradually lower it until the hexagonal barrel foundation is completely sunk;

[0020] S7. Untie the upward and downward cables, retract the clamps and positioning piles, release the buckles on the U-shaped floating boat, and let the K-shaped floating boat and the U-shaped floating boat leave; inflate the interior of the sinking pad to make the sinking pad, columns and legs float up as a whole, and tow them to the next location for sinking.

[0021] The beneficial effects of the present invention compared with the prior art are:

[0022] 1. The U-shaped sinking pad can ensure that the hexagonal barrel foundation and the floating ship can enter and exit freely, and can sink after floating to the designated position, thus improving the overall installation efficiency;

[0023] 2. The floating ship, the sinking pad and the columns are integrated into one, which can provide the reaction force for stabilizing and lifting. The structure of "U"-shaped sinking pad with multiple pairs of columns is adopted, and the floating ship is used for joint sinking, which ensures the safety and stability of the hexagonal barrel foundation during the sinking process;

[0024] 3. The column itself plays a role in straightening the sinking of the sinking pad, ensuring the stability of the sinking of the sinking pad. There is a large space inside the column to accommodate construction personnel and install various mechanical devices during the sinking process;

[0025] 4. The device uses an upward-pull righting cable and a downward-pull cable to sink in deep water. The upward-pull righting cable can provide the righting function of the hexagonal barrel foundation under strong wind and waves, while the downward-pull cable realizes the sinking of the hexagonal barrel foundation.

[0026] 5. The sinker and floating boat are detachable structures, can be reused, and are suitable for different water depth environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention.

[0028] Figure 2 It is the front view of the present invention.

[0029] Figure 3 yes Figure 2 Top view of the .

[0030] Figure 4 Schematic diagram of cable connection before the pull-down cable is pulled down.

[0031] Figure 5 Schematic diagram of cable connection when the pull-down cable is pulled down.

[0032] Figure 6 This is the overall structure diagram of the submerged pad.

[0033] Figure numerals: 1. sinker; 2. column; 3. leg; 4. top beam; 5. pulley; 6. pull-up righting cable; 7. pull-down cable; 8. clamp; 9. K-type floating vessel; 10. U-type floating vessel; 11. hanger; 12. positioning pile; 13. buckle; 14. hexagonal cylinder foundation; 15. transition section; 16. float. DETAILED DESCRIPTION

[0034] The present invention will be further described below based on specific implementation methods.

[0035] like Figure 1-6The deepwater offshore wind power cylindrical foundation installation device shown comprises a sinking mat 1, a floating body and a cable assembly, wherein a plug leg 3 is arranged on the lower surface of the sinking mat 1, a column 2 is arranged on the upper surface of the sinking mat 1, and a top beam 4 is arranged on the top of the column 2. The columns 2 are arranged in groups of two, and a top beam 4 is arranged on the top of each group of columns 2. The shape of the sinking pad 1 is "U"-shaped. The sinking pad 1 is a steel box structure with a hollow interior. The sinking pad 1 is provided with air holes. The air pump can inflate the sinking pad 1 through the air holes. The water pump can drain the sinking pad 1 through the air holes. It is used to deflate the sinking pad 1 before sinking and to inflate the sinking pad 1 before floating. The inner wall of the sinking pad 1 is provided with a fixed pulley 5. The floating body includes a K-type floating ship 9 and a U-type floating ship 10. The K-type floating ship 9 is embedded in the inner contour of the U-type floating ship 10, and the space surrounded by the K-type floating ship 9 and the U-type floating ship 10 is used to place the hexagonal cylindrical foundation 14 to be installed. The U-type floating ship 10 is also provided with a buckle 13 for clamping the side wall of the hexagonal cylindrical foundation 14. The bow and stern of the U-type floating ship 10 are both provided with positioning piles 12, and the positioning piles 12 can slide in the U-type floating ship 10 in the vertical direction. The outer wall of the U-shaped floating ship 10 is provided with a clamp 8; the K-shaped floating ship 9 and the U-shaped floating ship 10 are both provided with a hanger 11; in this embodiment, the water depth is 25m, the height of the hexagonal barrel foundation 14 is 15m, and a transition section 15 with a height of 30m is fixedly provided above the hexagonal barrel foundation 14. The outer contour length of the sinking mat 1 is 75m and the width is 60m; the inner contour length of the sinking mat 1 is 65m and the width is 45m, and the inner contour size can include the hexagonal barrel foundation 14, the K-shaped floating ship 9 and the U-shaped floating ship 10. The depth of the mat 1 is 5m; 6 pairs of columns 2 are evenly arranged on the top of the mat 1, and the columns are steel cylinder structures with a diameter of 8m and a height of 30m; the columns 2 close to the outer contour are extended about 2m toward the bottom surface of the mat to form legs 3; a top beam 4 is arranged on the top of each pair of columns 2, and the top beam 4 is a steel structure, with 6 in number; 12 hangers 11 are evenly arranged on the top of the K-type floating ship 9 and the U-type floating ship 10, of which 8 are arranged on the top of the K-type floating ship 9 and 4 are arranged on the top of the U-type floating ship 10; 12 pull-up cables 6 are arranged at the bottom of the hanger 11, and each pull-up cable 6 is connected to each side of the outer edge of the top cover of the hexagonal cylinder foundation 14; the two inner walls of the mat 1 in the width direction Two fixed pulleys are evenly arranged on the upper surface, corresponding to four side walls of the hexagonal barrel foundation respectively; four pull-down cables 7 are arranged, each of which is connected to the bottom of four symmetrical side walls of the hexagonal barrel foundation 14, and the pull-down cables 7 pass through the fixed pulley 5 on the inner wall of the sinking pad 1 and are pulled upward. When sinking in the water, the hexagonal barrel foundation 14 is sunk downward by pulling the pull-down cables; the number of the clamps 8 on the outside of the U-shaped floating ship 10 is consistent with the number of the columns 2, which is 6 in this embodiment; a total of 3 positioning piles 12 are arranged at the bow and stern of the U-shaped floating ship 10, including 1 at the bow and 2 at the stern, and the positioning piles 12 can slide up and down along the U-shaped floating ship 10.

[0036] The cable assembly includes an upper pull-up cable 6 and a lower pull-down cable 7, one end of the upper pull-up cable 6 is connected to the hanger 11, and the other end is connected to the top of the hexagonal cylindrical foundation 14; the lower pull-down cable 7 passes around the fixed pulley 5, and one end of the lower pull-down cable 7 is connected to the float 16, and the other end is connected to the bottom of the hexagonal cylindrical foundation 14.

[0037] The pull-down cable 7 includes a first pull-down cable 7A and a second pull-down cable 7B which are detachable from each other; in the non-use state, the first pull-down cable 7A passes around the fixed pulley 5, and the head end and the tail end are both connected to the float 16, the head end of the second pull-down cable 7B is connected to the float 16, and the tail end is connected to the bottom of the hexagonal cylindrical foundation 14; in the use state, the first pull-down cable 7A passes around the fixed pulley 5, and the head end of the first pull-down cable 7A is connected to the float 16, the tail end of the first pull-down cable 7A is connected to the head end of the second pull-down cable 7B as a whole, and the tail end of the second pull-down cable 7B is connected to the bottom of the hexagonal cylindrical foundation 14.

[0038] The deep-water offshore wind power cylindrical foundation installation method using the above device comprises the following steps:

[0039] S1, placing the hexagonal barrel foundation 14 in the space enclosed by the K-type floating ship 9 and the U-type floating ship 10, embedding the K-type floating ship 9 into the U-type floating ship 10, and clamping the hexagonal barrel foundation 14 with the buckle 13;

[0040] S2, sinking the sinking mat 1, the column 2 and the plug leg 3 as a whole; during the sinking process, the air holes of the sinking mat 1 are closed. In other embodiments of the present invention, water may be poured into the sinking mat 1 through the air holes to accelerate the sinking of the sinking mat 1;

[0041] S3, after the legs 3 are inserted into the seabed to stabilize the sinking pad 1, the K-type floating ship 9, the U-type floating ship 10 and the hexagonal barrel foundation 14 are towed as a whole to the designated position, and the column 2 is clamped with the clamp 8;

[0042] S4, lower the positioning pile 12, and insert the positioning pile 12 into the seabed mud bed to stabilize the floating body; at this time, the first end of the first pull-down cable 7A floats to the water surface through the buoy 16, and the end passes through the pulley on the inner wall of the sinking mat 1 and floats to the water surface through the buoy 16; the first end of the second pull-down cable 7B also floats on the water surface through the buoy 16, and the end is connected to the bottom of the hexagonal barrel foundation 14;

[0043] S5, remove the floating ball 16 at the end of the first pull-down cable 7A and the head end of the second pull-down cable 7B, and connect the end of the first pull-down cable 7A and the head end of the second pull-down cable 7B as a whole to form a cable, namely the pull-down cable 7, the head end of the pull-down cable 7 passes through the fixed pulley 5 on the inner side wall of the sinking mat 1, and the end is connected to the bottom of the hexagonal barrel foundation 14;

[0044] S6, pull up the head end of the pull-down cable 7, the K-type floating ship 9 and the U-type floating ship 10 slide downward along the positioning pile 12 as a whole, the buckle 13 tightly clamps the hexagonal barrel foundation 14, so that the hexagonal barrel foundation 14 continues to sink, and the upward pulling straightening cable 6 is gradually lowered until the hexagonal barrel foundation 14 is completely sunk;

[0045] S7, untie the upward righting cable 6 and the downward cable 7, retract the clamp 8 and the positioning pile 12, release the buckle 13 on the U-shaped floating boat 10, and the K-shaped floating boat 9 and the U-shaped floating boat 10 leave; inflate the interior of the sinking mat 1 through the air hole, so that the sinking mat 1, the column 2 and the plug leg 3 float as a whole, and tow them to the next location for sinking; in other embodiments of the present invention, a water pump can also be used to pump out the water in the sinking mat 1 through the air hole, and then inflate the sinking mat 1.

[0046] In the description of the present invention, it should be understood that the terms "first", "end", "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the present invention.

[0047] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect" and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] The above is only a preferred embodiment of the present invention, but the present invention is not limited to the above specific embodiments. For ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept, which all fall within the scope of protection of the present invention.

Claims

1. A deepwater offshore wind turbine cylinder foundation installation device, comprising a sinking mat (1), a floating body and a cable assembly, characterized in that: The inner wall of the sinking pad (1) is provided with a fixed pulley (5); the floating body comprises a K-type floating ship (9) and a U-type floating ship (10), the K-type floating ship (9) is embedded in the inner contour of the U-type floating ship (10), and the space enclosed by the K-type floating ship (9) and the U-type floating ship (10) is used to place the hexagonal cylindrical foundation (14) to be installed; the bow and stern of the U-type floating ship (10) are both provided with positioning piles (12), and the outer wall of the U-type floating ship (10) is provided with a clamp (8); the K-type floating ship (9) and the U-type floating ship (10) are both provided with A hanger (11); the cable assembly comprises an upward-pull-up straightening cable (6) and a downward-pull-down cable (7); one end of the upward-pull-up straightening cable (6) is connected to the hanger (11), and the other end is connected to the top of the hexagonal cylindrical foundation (14); the downward-pull-down cable (7) passes over the fixed pulley (5), and one end of the downward-pull-down cable (7) is connected to a buoy (16), and the other end is connected to the bottom of the hexagonal cylindrical foundation (14); the lower surface of the sinking pad (1) is provided with a plug leg (3), the upper surface of the sinking pad (1) is provided with a column (2), and the top of the column (2) is provided with a top beam (4).

2. The deepwater offshore wind power cylinder-type foundation installation device according to claim 1 is characterized in that: The pull-down cable (7) comprises a first pull-down cable (7A) and a second pull-down cable (7B) which are detachable from each other; in a non-use state, the first pull-down cable (7A) passes around the fixed pulley (5), and both the head end and the tail end are connected to a buoy (16), and the head end of the second pull-down cable (7B) is connected to the buoy (16), and the tail end is connected to the bottom of the hexagonal cylindrical foundation (14); in a use state, the first pull-down cable (7A) passes around the fixed pulley (5), and the head end of the first pull-down cable (7A) is connected to the buoy (16), the tail end of the first pull-down cable (7A) is connected to the head end of the second pull-down cable (7B) as a whole, and the tail end of the second pull-down cable (7B) is connected to the bottom of the hexagonal cylindrical foundation (14).

3. The deepwater offshore wind power cylinder-type foundation installation device according to claim 1 is characterized in that: The U-shaped floating vessel (10) is also provided with a buckle (13) for clamping the side wall of the hexagonal cylindrical foundation (14).

4. The deepwater offshore wind power cylinder-type foundation installation device according to claim 1 is characterized in that: The upright posts (2) are grouped in pairs, and a top beam (4) is provided on the top of each group of upright posts (2).

5. The deepwater offshore wind power cylinder-type foundation installation device according to claim 1 is characterized in that: The shape of the sinker (1) is "U"-shaped. The sinker (1) is a steel box structure with a hollow interior. Air holes are also provided on the sinker (1).

6. A method for installing a cylindrical foundation using the deepwater offshore wind power cylindrical foundation installation device according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1, placing the hexagonal cylindrical foundation (14) in the space enclosed by the K-type floating ship (9) and the U-type floating ship (10), embedding the K-type floating ship (9) into the U-type floating ship (10), and clamping the hexagonal cylindrical foundation (14) with a buckle (13); S2, sinking the sinking pad (1), the column (2) and the plug leg (3) as a whole; S3, after the legs (3) are inserted into the seabed to stabilize the sinking pad (1), the K-type floating vessel (9), the U-type floating vessel (10) and the hexagonal cylindrical foundation (14) are towed as a whole to the designated location, and the columns (2) are clamped tightly with clamps (8); S4, lowering the positioning pile (12); at this time, the first end of the first pull-down cable (7A) floats on the water surface through the floating ball (16), and the end passes through the pulley on the inner wall of the sinking pad (1) and also floats on the water surface through the floating ball (16); the first end of the second pull-down cable (7B) also floats on the water surface through the floating ball (16), and the end is connected to the bottom of the hexagonal barrel foundation (14); S5, remove the floating ball (16) at the end of the first pull-down cable (7A) and the beginning of the second pull-down cable (7B), and connect the end of the first pull-down cable (7A) and the beginning of the second pull-down cable (7B) as a whole to form a cable, namely the pull-down cable (7), the beginning of the pull-down cable (7) passes through the fixed pulley (5) on the inner wall of the sinking pad (1), and the end is connected to the bottom of the hexagonal barrel foundation (14); S6, pulling up the head end of the pull-down cable (7) to make the hexagonal barrel foundation (14) sink continuously, and gradually lowering the upward straightening cable (6) until the hexagonal barrel foundation (14) is completely sunk; S7, untie the upper righting cable (6) and the lower righting cable (7), retract the clamp (8) and the positioning pile (12), release the buckle (13) on the U-shaped floating boat (10), and the K-shaped floating boat (9) and the U-shaped floating boat (10) leave; and inflate the interior of the sinking pad (1) so that the sinking pad (1), the column (2) and the plug leg (3) float as a whole, and tow them to the next location for sinking.

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