Marine transportation tool of tension leg platform

Abstract

According to the marine transportation tool of the tension leg platform, the marine transportation tool of the tension leg platform is improved, and the stability of the tension leg platform in the wet dragging transportation process is guaranteed. The tension leg platform comprises a mounting column and a tension arm, the tension arm comprises an arm body connected with the mounting column and a wrist part protruding from the arm body, the marine transportation tool comprises a plurality of floating bodies, and a plurality of ballast tanks are arranged in the floating bodies and used for injecting or discharging ballast water; every two floating bodies form a group and are connected with the wrist parts of the corresponding tension arms, and the two floating bodies belonging to the same group are respectively arranged on the two sides of the tension arms.

Description

Technical Field

[0001] The utility model relates to the technical field of offshore wind turbines, and specifically, to a marine transportation tool for a tension leg platform. Background Art

[0002] In the field of offshore wind power, the tension leg platform (Tension Leg Platform, abbreviated as TLP), as an important floating foundation structure, has received extensive attention in the development of deep-sea wind power due to its excellent motion performance and economic benefits.

[0003] However, when the existing tension leg platforms are transported by wet towing, their stability is significantly insufficient. Wet transportation is a common method of transporting the platform and its attached equipment by tugboats and other transportation tools on the sea over a long distance to the installation site after manufacturing. Although this method has relatively low costs and is easy to operate, when the sea conditions are poor, such as in extreme weather conditions like strong winds and large waves, the stability of the tension leg platform cannot be guaranteed. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a marine transportation tool for a tension leg platform. By improving the marine transportation tool for the tension leg platform, the stability of the tension leg platform during wet towing transportation is ensured.

[0005] To achieve the above purpose, the utility model provides a marine transportation tool for a tension leg platform. The tension leg platform includes a mounting column and a tension arm. The tension arm includes an arm body connected to the mounting column and a wrist protruding from the arm body. The marine transportation tool includes a plurality of floating bodies, and a plurality of ballast tanks are arranged inside the floating bodies for injecting or discharging ballast water; the floating bodies are connected to the wrists of the corresponding tension arms in pairs, and the two floating bodies belonging to the same group are respectively arranged on both sides of the tension arm.

[0006] By adopting the method in the present application, the transportation tool can be filled with water, so that under the action of the transportation tool, the tension leg platform is driven to sink to a certain height, thereby significantly reducing the center of gravity of the tension leg platform; at the same time, since the highest point of the floating body exceeds half of the vertical height of the mounting column, the depth of the floating body sinking into the sea surface can be increased, thereby increasing the contact area and interaction force between the tension leg platform and the sea water. This not only helps to disperse the wave impact force received by the tension leg platform, but also further improves the overall stability of the tension leg platform by increasing the underwater damping effect, reduces the sway of the tension leg platform caused by the sea wave fluctuations, and improves the stability of the tension leg platform.

[0007] Optionally, the buoy includes an upper section and a lower section, the upper section is vertically located on the upper side of the lower section, the maximum dimension of the upper section in the horizontal direction is smaller than the maximum dimension of the lower section in the horizontal direction, and the vertical height of the upper section is greater than the vertical height of the lower section. By adopting such a method, the horizontal dimension of the lower section is larger, so that the lower section has a larger waterplane surface (referring to the intersection surface of the horizontal plane under a specific draft and the buoyancy body), which is used to enhance the wind and wave resistance of the overall structure of the tension leg platform and the wind turbine and increase the stability of the system during long-distance towing; at the same time, compared with the lower section, the vertical dimension of the upper section is greater than that of the lower section, and sufficient height increases the sinking distance of the tension leg platform, thereby increasing the waterplane surface of the tension leg platform, and further increasing the buoyancy of the tension leg platform.

[0008] Optionally, the cross section of the upper section in the horizontal direction is circular, and the cross section of the lower section in the horizontal direction is square. Since the top of the upper section will always be above the sea surface during wet dragging, the circular cross section of the upper section can improve the fluid dynamics performance of the upper section, and can more effectively reduce the impact and shaking caused by waves and ocean currents, thereby improving the stability of the power leg platform during wet dragging. The square shape of the lower section allows the lower section to have more space to accommodate the carrying water, so that the float has a better ballast effect.

[0009] Optionally, a buoy is installed at the front end of the wrist, and the offshore transport tooling is located between the arm body and the buoy. This installation position is convenient for installation and disassembly and will not interfere with the buoy of the tension leg platform itself.

[0010] Optionally, the vertical height of the upper section is greater than the vertical height of the buoy, and the buoy can be completely submerged in water during wet dragging, further increasing the draft area of ​​the tension leg platform.

[0011] Optionally, the tension leg platform further comprises an oblique brace, one end of the oblique brace abuts against the mounting column, and the other end abuts against the position where the arm body and the wrist are connected; the upper section vertically exceeds the position where the oblique brace abuts against the mounting column. Thus, the oblique brace can be submerged in water, thereby further increasing the draft area of ​​the tension leg and lowering the center of gravity of the tension leg.

[0012] Optionally, the central axis of the upper section coincides with the center line of the lower section, thereby ensuring that the force on each floating body is uniform.

[0013] Optionally, each of the floating bodies is uniformly arranged along the circumferential direction of the mounting column; the uniform arrangement of the floating bodies along the circumferential direction of the mounting column can ensure a more uniform load distribution of the platform in the horizontal direction, which helps to reduce the structural stress and deformation caused by uneven loads, thereby improving the overall stability of the tension leg platform; at the same time, the uniformly distributed floating bodies can better resist the impact of external forces, reduce the swaying and tilting of the tension leg platform, and further improve the stability of the tension leg platform.

[0014] Optionally, one of the lower segments is provided with a U-shaped connecting arm, and the other lower segment is provided with a plate-shaped connecting arm, and the plate-shaped connecting arm is inserted and locked with the U-shaped connecting arm along the radial direction of the wrist; the transportation tooling is provided with an installation channel for installing the wrist, and the installation channel axially penetrates through the U-shaped connecting arm and the plate-shaped connecting arm; the U-shaped connecting arm has two side arm segments opposite to each other in the axial direction of the wrist, and first installation grooves are formed in both side arm segments, and a second installation groove is formed in the plate-shaped connecting arm; the groove walls of the first installation groove constitute part of the wall of the installation channel, and the groove walls of the second installation groove constitute part of the wall of the installation channel, whereby the transportation tooling can be connected to each wrist.

[0015] Optionally, a leveling structure is further included, and the leveling structure is arranged on the lower surface of the lower segment; the leveling structure includes a cylinder, and a cavity is formed between the inner wall of the cylinder and the lower surface of the lower segment, and the cylinder is coaxially arranged with the upper segment. Through such an arrangement, the tension leg platform can be seated on the bottom under the action of the floating body, and at the same time, during the process of its seating on the bottom, the leveling structure can be used for leveling. Description of the Drawings

[0016] The drawings incorporated in the specification and constituting a part of the specification illustrate the embodiments of the present specification, and together with the description thereof are used to explain the principles of the present specification.

[0017] Figure 1 is a top view of the assembled tension leg platform, wind turbine and marine transportation tooling in the embodiment of the present utility model;

[0018] Figure 2 is Figure 1 a partial side view of

[0019] Figure 3 is a side view of the two floating bodies of the marine transportation tooling in a disassembled state;

[0020] Figure 4 is a top view of the two floating bodies of the marine transportation tooling in an assembled state.

[0021] Reference Signs:

[0022] 100 - Tension leg platform; 200 - Wind turbine; 1 - Tension arm; 11 - Arm body; 12 - Wrist; 13 - Diagonal brace; 2 - Offshore transportation tooling; 20 - Floating body; 21 - Upper section; 22 - Lower section; 221 - U-shaped connecting arm; 221a - Side arm section; 221b - First installation groove; 221c - Bottom arm section; 222 - Plate-shaped connecting arm; 222a - Second installation groove; 223 - Installation channel; 23 - Ballast tank; 24 - Watertight bulkhead panel; 25 - Cylinder; 26 - Accommodation space; 27 - Locking member; 3 - Installation column; 4 - Buoy. Detailed implementation mode

[0023] The utility model provides an offshore transportation tooling for a tension leg platform. By improving the offshore transportation tooling for the tension leg platform, the stability of the tension leg platform during wet towing transportation is ensured.

[0024] In order to enable those skilled in the art to better understand the solution of the utility model, the following further detailed description of the utility model will be given in conjunction with the accompanying drawings and specific implementation modes.

[0025] Relative terms such as "first" and "second" are only used to distinguish one component with the same name from another, and do not necessarily require or imply any such actual relationship or order between these components.

[0026] Please refer to Figures 1 to 4 , Figure 1 which is the top view after the tension leg platform, wind turbine and offshore transportation tooling in the embodiment of the utility model are assembled; Figure 2 is Figure 1 a partial side view of Figure 3 which is the side view of the two floating bodies of the offshore transportation tooling in the disassembled state; Figure 4 which is the top view of the two floating bodies of the offshore transportation tooling in the assembled state.

[0027] The present application provides a marine transportation tooling 2 for a tension leg platform 100. The tension leg platform 100 includes a tension arm 1 and a mounting column 3. The mounting column 3 extends in the vertical direction for mounting a wind turbine 200. The tension arms 1 are circumferentially distributed along the mounting column 3 and project radially from the mounting column 3. In the example shown in the figure, the tension leg platform 100 has three tension arms 1, and the three tension arms 1 are evenly distributed around the mounting column 3. Each tension arm 1 specifically includes an arm body 11 and a wrist 12 protruding from the arm body 11. The tension arm 1 is a horizontally extending tubular beam, one end of which is connected to the mounting column 3, and the other end continues to extend to form the wrist 12, which extends in the same direction as the arm body 11 in the horizontal direction. The tension leg platform 100 further includes a diagonal brace 13. One end of the diagonal brace 13 abuts against the mounting column 3, and the other end abuts against the position where the arm body 11 is connected to the wrist 12. A buoy 4 is installed at the foremost end of the wrist 12, that is, the end of the wrist 12 away from the mounting column 3.

[0028] The marine transportation tooling 2 includes a number of floating bodies 20. The floating bodies 20 are connected to the corresponding wrists 12 in pairs, and the floating bodies 20 in the same group are arranged on both sides of the tension arm 1. Being arranged on both sides of the tension arm 1 means being located on the left and right sides of the wrist 12 in the radial direction of the wrist 12. In the vertical direction, the highest point of the floating body 20 exceeds half of the vertical height of the mounting column 3. At the same time, a number of ballast tanks 23 are partitioned inside the marine transportation tooling 2, and the ballast tanks 23 can discharge and inject ballast water. Each of the ballast tanks 23 can be independent of each other or hermetically sealed, and the ballast tanks 23 use air ballast technology to drain and fill the ballast tanks 23.

[0029] By adopting the method in the present application, the marine transportation tooling 2 can be filled with water, so that under the action of the marine transportation tooling 2, the tension leg platform 100 is driven to sink to a certain height, thereby significantly reducing the center of gravity of the tension leg platform 100. At the same time, since the highest point of the floating body 20 exceeds half of the vertical height of the mounting column 3, the depth to which the floating body 20 sinks into the sea surface can be increased, thereby increasing the contact area and interaction force between the tension leg platform 100 and the seawater. This not only helps to disperse the wave impact force received by the tension leg platform 100, but also further improves the overall stability of the tension leg platform 100 by increasing the underwater damping effect, reduces the swaying of the tension leg platform 100 caused by sea wave fluctuations, and improves the stability of the tension leg platform 100.

[0030] In some implementations, the floating bodies 20 are evenly arranged along the circumferential direction of the mounting column 3. The even arrangement of the floating bodies 20 along the circumferential direction of the mounting column 3 can ensure a more uniform load distribution of the platform in the horizontal direction, which helps to reduce the structural stress and deformation caused by uneven loads, thereby improving the overall stability of the tension leg platform 100. At the same time, the evenly distributed floating bodies 20 can better resist the impact of external forces, reduce the swaying and tilting of the tension leg platform 100, and further improve the stability of the tension leg platform 100.

[0031] In a specific implementation, each floating body 20 includes an upper section 21 and a lower section 22. The upper section 21 is vertically located above the lower section 22. The maximum dimension of the upper section 21 in the horizontal direction is smaller than the maximum dimension of the lower section 22 in the horizontal direction. The vertical height of the upper section 21 is greater than the vertical height of the lower section 22. The ballast tanks 23 in the upper section 21 are distributed vertically, and the ballast tanks 23 in the lower section 22 are distributed horizontally. Each ballast tank 23 is connected and communicated. By adopting such a method, the dimension of the lower section 22 in the horizontal direction is larger, so that the lower section 22 has a larger waterplane (referring to the intersection surface of the horizontal plane at a specific draft and the floating body 20) to improve the wave and wind resistance of the overall structure of the tension leg platform 100 and the wind turbine 200 during long-distance towage and increase the system stability. At the same time, compared with the lower section 22, the dimension of the upper section 21 in the vertical direction is such that the height of the upper section 21 is greater than the height of the lower section 22. The sufficient height increases the sinking distance of the tension leg platform 100, thereby increasing the waterplane of the tension leg platform 100 and further increasing the buoyancy received by the tension leg platform 100.

[0032] In some implementations, the highest point of the floating body 20 is higher than the highest point of the buoy 4, so that the buoy 4 can be completely submerged in water. Optionally, the vertical height of the upper section 21 is greater than the vertical height of the buoy 4. During wet towage, the buoy 4 can be completely submerged in water, further increasing the draft area of the tension leg platform 100. It can also be that the upper section 21 vertically extends beyond the position where the diagonal brace 13 abuts against the mounting column 3. Thus, the diagonal brace 13 can be submerged in water, thereby further increasing the draft area of the tension leg and reducing the center of gravity of the tension leg.

[0033] In the example shown in the figure, the upper section 21 has a circular cross-section in the horizontal direction, and the lower section 22 has a square cross-section in the horizontal direction. Of course, the cross-section of the upper section 21 can also be square, polygonal, etc., and the cross-section of the lower section 22 can also be circular, etc. In the example shown in the figure, the upper section 21 has a cylindrical structure, and a horizontally extending watertight bulkhead plate 24 is provided inside the upper section 21 to divide the space inside the upper section 21 into several ballast tanks 23 extending vertically. Of course, it is also possible to provide a vertically extending watertight bulkhead plate 24 inside the upper section 21, and the intersection position of the vertically extending watertight bulkhead plate 24 and the horizontally extending watertight bulkhead plate 24 is arranged along the central axis of the cylindrical structure. The inside of the lower section 22 is also divided into several ballast tanks 23 by several vertically extending watertight bulkhead plates 24 and horizontally extending watertight bulkhead plates 24, and the ballast tanks 23 can be distributed in the horizontal direction and / or in the vertical direction.

[0034] During the wet towing process of the upper section 21, its top end will always exceed the sea surface. In this way, the circular cross-section of the upper section 21 can improve the hydrodynamic performance of the upper section 21, and can more effectively reduce the impact and sway generated by waves and ocean currents on it, thereby improving the stability of the dynamic leg platform during the wet towing process. The square shape of the lower section 22 allows the lower section 22 to have more space to accommodate the carrying water, making the floating body 20 have a better ballast effect. To ensure uniform force on each floating body 20, the central axis of the upper section 21 coincides with the center line of the lower section 22.

[0035] Optionally, in order to increase the structural strength of the upper section 21 of the cylindrical structure, a number of reinforcing ribs are provided on the inner wall of the upper section 21. The reinforcing ribs extend axially, and both ends of the reinforcing ribs abut against the top wall and the bottom wall of the upper section 21 respectively. A number of reinforcing ribs are evenly distributed along the circumferential direction of the upper section 21.

[0036] In the above embodiment, a U-shaped connecting arm 221 is provided on one lower section 22. The installation position of the U-shaped connecting arm 221 and the lower section 22 is spaced from the edge of the lower section 22. A plate-shaped connecting arm 222 is provided on the other lower section 22. The installation position of the plate-shaped connecting arm 222 and the corresponding lower section 22 is spaced from the edge of the lower section 22. The plate-shaped connecting arm 222 is inserted and locked with the U-shaped connecting arm 221 along the radial direction of the wrist 12. In this way, there is a certain interval between the two floating bodies 20, and a receiving space 26 is formed between the two floating bodies 20 and the outer wall of the U-shaped connecting arm 221. At least part of the floating cylinder 4 is located in the receiving space 26. Further, the connection line between the center of the floating cylinder 4 and the center of one floating body 20 is l1, and the connection line between the center of the floating cylinder 4 and the center of the other floating body 20 is l2. The included angle between l1 and l2 is greater than 100°.

[0037] The marine transportation tooling 2 is provided with an installation channel 223 for installing the wrist part 12. The installation channel 223 axially penetrates through the U-shaped connecting arm 221 and the plate-shaped connecting arm 222. First installation grooves 221b are formed in both side arm segments 221a of the U-shaped connecting arm 221, and a second installation groove 222a is formed in the plate-shaped connecting arm 222. The groove walls of the first installation grooves 221b constitute part of the wall of the installation channel 223, and the groove walls of the second installation groove 222a constitute part of the wall of the installation channel 223, whereby the marine transportation tooling 2 can be connected to each wrist part 12.

[0038] Specifically, the U-shaped connecting arm 221 for plug-in connection has two opposite side arm segments 221a and a bottom arm segment 221c connected between the two side arm segments 221a. The bottom arm segment 221c extends along the axis of the wrist part 12 and is fixedly connected to the lower segment part 22. First installation grooves 221b are formed in both side arm segments 221a. A second installation groove 222a is formed in the plate-shaped connecting arm 222. After the plate-shaped connecting arm 222 is plugged into the U-shaped connecting arm 221, the groove walls of part of the first installation grooves 221b abut against the side walls of part of the wrist part 12, and the groove walls of part of the second installation groove 222a abut against the side walls of part of the wrist part 12.

[0039] The marine transportation tooling 2 further includes a locking member 27. The locking member 27 axially penetrates through the side arm segment 221a and the plate-shaped connecting arm 222 in sequence to lock the plate-shaped connecting arm 222 and the U-shaped connecting arm 221. The locking member 27 is a locking pin or a plug rod for locking the two floating bodies 20 in the axial and radial directions of the wrist part 12. There are two locking members 27 arranged in the height direction, one located on the upper side of the wrist part 12 and the other located on the lower side of the wrist part 12.

[0040] In another alternative solution, the marine transportation tooling 2 is located between the arm body 11 and the floating drum 4. Specifically, one side of the U-shaped connecting arm 221 can abut against the floating drum 4, and the other side can abut against the mounting column 3. This installation position is convenient for installation and disassembly and will not interfere with the floating drum 4 of the tension leg platform 100 itself. In some other alternative embodiments, the marine transportation tooling 2 further includes a leveling structure. The leveling structure is arranged on the lower surface of the lower segment part 22. The leveling structure includes a cylinder body 25. A cavity is formed between the inner wall of the cylinder body 25 and the lower surface of the lower segment part 22. The cylinder body 25 is coaxially arranged with the upper segment part 21. Through such an arrangement, the tension leg platform 100 can be seated on the bottom under the action of the floating body 20, and at the same time, the leveling structure can be used for leveling during the process of its seating on the bottom.

[0041] In this article, specific examples are used to elaborate on the principle and implementation mode of the present utility model. The description of the above embodiments is only used to help understand the core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art of this technology, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. An offshore transportation tool for a tension leg platform, the tension leg platform (100) comprising a mounting column (3) and a tension arm (1), the tension arm (1) comprising an arm body (11) connected to the mounting column (3) and a wrist (12) protruding from the arm body (11), characterized in that, The offshore transportation tooling (2) includes a plurality of floating bodies (20), and a plurality of ballast tanks (23) are arranged inside the floating bodies (20) for injecting or discharging ballast water; The floating bodies (20) are connected to the wrists (12) of the corresponding tension arms (1) in pairs, and the two floating bodies (20) belonging to the same group are arranged on both sides of the tension arm (1).

2. The offshore transportation tooling for a tension leg platform according to claim 1, characterized in that, A buoy (4) is installed at one end of the wrist (12) far from the mounting column (3); An accommodation space (26) is defined between the two floating bodies (20), and the accommodation space (26) is used to accommodate at least part of the buoy (4).

3. The offshore transportation tooling for a tension leg platform according to claim 2, characterized in that, The vertical height of the floating body (20) is greater than the vertical height of the buoy (4).

4. The offshore transportation tooling for a tension leg platform according to claim 1, characterized in that, Each of the floating bodies (20) is uniformly arranged along the circumference of the mounting column (3).

5. The offshore transportation tooling for a tension leg platform according to claim 1, characterized in that, The tension leg platform further includes a diagonal brace (13), one end of the diagonal brace (13) abuts against the mounting column (3), and the other end abuts against the position where the arm body (11) is connected to the wrist (12); The highest point of the floating body (20) vertically exceeds the position where the diagonal brace (13) abuts against the mounting column (3).

6. The offshore transportation tooling for a tension leg platform according to claim 1, characterized in that, Each of the floating bodies (20) includes an upper section (21) and a lower section (22), the upper section (21) is located above the lower section (22) in the vertical direction, the maximum dimension of the upper section (21) in the horizontal direction < the maximum dimension of the lower section (22) in the horizontal direction, and the vertical height of the upper section (21) > the vertical height of the lower section (22).

7. The offshore transportation tooling for a tension leg platform according to claim 6, characterized in that The cross-section of the upper section (21) is circular in the horizontal direction, and the cross-section of the lower section (22) is square in the horizontal direction.

8. The offshore transportation tooling for a tension leg platform according to claim 6, characterized in that, A U-shaped connecting arm (221) is provided on the lower section (22) of one of the floating bodies (20) in the same group, and a plate-shaped connecting arm (222) is provided on the lower section (22) of the other floating body (20), and the plate-shaped connecting arm (222) is inserted and locked with the U-shaped connecting arm (221) along the radial direction of the wrist (12); The offshore transportation tooling (2) is provided with an installation channel (223) for installing the wrist (12), and the installation channel (223) axially penetrates through the U-shaped connecting arm (221) and the plate-shaped connecting arm (222).

9. The offshore transportation tooling for a tension leg platform according to claim 8, characterized in that The U-shaped connecting arm (221) has two side arm segments (221a) opposite to each other in the axial direction of the wrist (12), and first installation grooves (221b) are respectively provided on the side arm segments (221a); The plate-shaped connecting arm (222) is provided with a second installation groove (222a); The groove walls of the first installation grooves (221b) constitute part of the wall of the installation channel (223), and the groove walls of the second installation grooves (222a) constitute part of the wall of the installation channel (223).

10. The offshore transportation tooling for a tension leg platform according to any one of claims 1-9, characterized in that, It further includes a leveling structure, and the leveling structure is arranged on the lower surface of the floating body (20).

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