Semi-submersible platform based on offshore wind power installation

Abstract

The utility model relates to the technical field of semi-submersible type platforms, and discloses a semi-submersible type platform based on offshore wind power installation, three auxiliary stand columns are evenly arranged at intervals in the circumferential direction with a main stand column as the center, a circular base is fixedly installed at the bottom of the main stand column, and three connecting arms are fixed to the circumferential face of the circular base in an array mode. A reinforcing plate is fixedly installed at the tops of the three auxiliary stand columns, the outer side of the main stand column is sleeved with a winding wheel, three sets of anchor cables are fixed to the circumferential face of the winding wheel in an array mode, the bottom ends of the anchor cables are fixed to the seabed, and the top of the winding wheel is connected with a rotation driving part; the output ends of the three hydraulic cylinders stretch out and draw back at the same time to drive the sliding column to slide in the guide frame, meanwhile, the sliding column exerts thrust on the guide frame and pushes the guide frame and the winding wheel to rotate, and therefore the anchor cable is wound or released through the winding wheel. Therefore, the length of the anchor cable between the circular base and the seabed is adjusted to adapt to the up-and-down floating of the semi-submersible platform on the sea surface.

Description

Technical Field

[0001] The utility model relates to the technical field of semi-submersible platforms, and specifically to a semi-submersible platform based on offshore wind power installation. Background Art

[0002] A semi-submersible platform is a floating platform widely used in ocean engineering, which combines various functions such as drilling, well servicing, and production. When installing a wind turbine for offshore wind power generation, it is supported by a semi-submersible platform. The semi-submersible platform mainly consists of three major parts: an upper platform, intermediate columns, and a lower floating body.

[0003] When installing a semi-submersible platform, it is generally anchored to the seabed by cables to prevent the semi-submersible platform from drifting away under the action of waves. However, conventional cables are directly fixed to the semi-submersible platform. When the waves impact the semi-submersible platform, the semi-submersible platform will move up and down, and the length of the cable is fixed, which will affect the up and down movement of the semi-submersible platform, so further improvement can be made. Summary of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the utility model provides a semi-submersible platform based on offshore wind power installation, which has the advantages of automatically winding or releasing cables, etc., and solves the problem that the fixed length of the cable affects the up and down movement of the semi-submersible platform under the action of waves.

[0006] (2) Technical Solutions

[0007] To achieve the purpose of automatically winding or releasing cables, the utility model provides the following technical solutions: A semi-submersible platform based on offshore wind power installation includes a main column and three auxiliary columns. The three auxiliary columns are circumferentially and evenly spaced around the main column. A circular base is fixedly installed at the bottom of the main column. Three connecting arms are fixedly arranged in an array on the circumferential surface of the circular base. The connecting arms are inclined, and the inner end of each connecting arm is lower than its outer end. The three auxiliary columns are respectively fixedly installed at the top of the outer end of the three connecting arms. A reinforcing plate is fixedly installed at the top of the three auxiliary columns. The main column is fixedly penetrated through the center of the reinforcing plate. A cable reel is sleeved outside the main column. Three groups of cables are fixedly arranged in an array on the circumferential surface of the cable reel. The bottom end of the cable is fixed to the seabed. A rotational driving member is connected to the top of the cable reel; A cavity one is arranged in the lower half of the main column, a cavity two is arranged in the lower half of the auxiliary column, a cavity three is arranged inside the circular base, and a cavity four is arranged in the lower half of the connecting arm. The cavity one and the cavity four are both communicated with the cavity three, and a ballast tank is formed through the cavity one, the cavity three, and the cavity four. Seawater is filled in the ballast tank.

[0008] Preferably, the reinforcement plate is in a "human" shape, and the three auxiliary columns are respectively fixed on the lower surfaces of the three ends of the reinforcement plate.

[0009] Preferably, three mounting seats are fixedly arranged in an array on the circumferential surface of the circular base. Each mounting seat is located between two adjacent connecting arms. Two fixed pulleys are rotatably connected inside each mounting seat. The cable anchor passes between the two fixed pulleys. Three guide pipes are fixedly installed on the side surface of the reinforcement plate. The three guide pipes are evenly distributed circumferentially at intervals with the main column as the center. The guide pipes correspond to the mounting seats one by one, and the guide pipes are located directly above the mounting seats. The cable anchor enters the guide pipes vertically and passes out from the tops of the guide pipes.

[0010] Preferably, a flared opening is arranged at the top of the guide pipe. The aperture of the flared opening gradually increases from bottom to top. Arc-shaped chamfers are arranged on the inner edges at both ends of the flared opening.

[0011] Preferably, the rotation driving member includes three hydraulic cylinders. The three hydraulic cylinders are rotatably connected to the upper surface of the reinforcement plate. The output ends of the hydraulic cylinders are fixedly installed with L-shaped plates. A sliding column is fixedly installed at the bottom of the L-shaped plate. Three guide frames are fixedly arranged in an array on the top of the cable reel. The sliding columns correspond to the guide frames one by one, and the sliding columns are slidably connected inside the guide frames.

[0012] Preferably, a diagonal brace is fixedly installed between the upper surface of the connecting arm and the circumferential surface of the main column.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the present utility model provides a semi-submersible platform, which has the following beneficial effects:

[0015] For the semi-submersible platform based on offshore wind power installation, by simultaneously extending and retracting the output ends of the three hydraulic cylinders, the sliding columns are driven to slide inside the guide frames. At the same time, the sliding columns apply a thrust to the guide frames and push the guide frames and the cable reels to rotate, so as to wind or release the cable anchors through the cable reels. Thus, the length of the cable anchors between the circular base and the seabed is adjusted to adapt to the up and down floating of the semi-submersible platform on the sea surface. Brief description of the drawings

[0016] Figure 1 is a three-dimensional structural schematic diagram of the semi-submersible platform based on offshore wind power installation proposed by the present utility model;

[0017] Figure 2 is a three-dimensional structural schematic diagram of the connecting arm of the semi-submersible platform based on offshore wind power installation proposed by the present utility model;

[0018] Figure 3 is a structural schematic diagram of the ballast tank of the semi-submersible platform based on offshore wind power installation proposed by the present utility model;

[0019] Figure 4 Schematic diagram of the cable anchor structure of the semi-submersible platform for offshore wind power installation proposed by the present utility model;

[0020] Figure 5 Schematic three-dimensional structure diagram of the rotation drive member of the semi-submersible platform for offshore wind power installation proposed by the present utility model.

[0021] In the figure: 1, main column; 2, auxiliary column; 3, circular base; 4, connecting arm; 5, diagonal brace; 6, reinforcing plate; 7, winding wheel; 8, cable anchor; 9, rotation drive member; 10, mounting seat; 11, fixed pulley; 12, guiding cylinder; 101, cavity one; 201, cavity two; 301, cavity three; 401, cavity four; 901, hydraulic cylinder; 902, L-shaped plate; 903, sliding column; 904, guiding frame. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figures 1-5 , a semi-submersible platform for offshore wind power installation, including a main column 1 and three auxiliary columns 2, and the three auxiliary columns 2 are circumferentially and evenly spaced around the main column 1. A circular base 3 is fixedly installed at the bottom of the main column 1, and three connecting arms 4 are fixedly arranged in an array on the circumferential surface of the circular base 3. The connecting arms 4 are inclined, and the inner end of each connecting arm 4 is lower than its outer end. The three auxiliary columns 2 are respectively fixedly installed at the top of the outer end of the three connecting arms 4, so as to lower the center of gravity of the main column 1, the auxiliary columns 2, the circular base 3 and the connecting arms 4, and improve the stability after submerging into the sea. A cavity one 101 is arranged in the lower half of the main column 1, a cavity two 201 is arranged in the lower half of the auxiliary column 2, a cavity three 301 is arranged inside the circular base 3, and a cavity four 401 is arranged in the lower half of the connecting arm 4. The cavity one 101 and the cavity four 401 are both communicated with the cavity three 301, and a ballast tank is formed through the cavity one 101, the cavity three 301 and the cavity four 401. Seawater is filled in the ballast tank. The ballast tank is provided with a water inlet system and a drainage system to regulate the water volume inside the ballast tank, so as to adjust the overall draft depth of the main column 1, the auxiliary columns 2, the circular base 3 and the connecting arms 4. A weight stabilizer is arranged inside the cavity one 101. In this embodiment, the weight stabilizer is a two-axis gyro stabilizer.

[0024] A diagonal brace 5 is fixedly installed between the upper surface of the connecting arm 4 and the circumferential surface of the main column 1, which further supports the main column 1 and makes the installation of the main column 1 more stable. Reinforcing plates 6 are fixedly installed at the tops of the three secondary columns 2, and the main column 1 is fixedly penetrated through the center of the reinforcing plate 6. The reinforcing plate 6 is in a "human" shape, and the three secondary columns 2 are respectively fixed to the lower surfaces of the three end parts of the reinforcing plate 6. The tops of the three secondary columns 2 are connected and fixed by the reinforcing plate 6. A winding wheel 7 is sleeved outside the main column 1. Three groups of anchor cables 8 are fixedly arranged in an array on the circumferential surface of the winding wheel 7. The bottom ends of the anchor cables 8 are fixed to the seabed. A rotation driving member 9 is connected to the top of the winding wheel 7. By driving the winding wheel 7 to rotate through the rotation driving member 9, the anchor cables 8 are wound or released to adjust the length of the anchor cables 8 between the circular base 3 and the seabed.

[0025] Three mounting seats 10 are fixedly arranged in an array on the circumferential surface of the circular base 3. Each mounting seat 10 is located between two adjacent connecting arms 4. Two fixed pulleys 11 are rotatably connected inside the mounting seat 10, and the anchor cable 8 passes between the two fixed pulleys 11. The two fixed pulleys 11 clamp and limit the anchor cable 8 and turn the fixed pulleys 11 to make the anchor cable 8 extend vertically upward.

[0026] Three guide pipes 12 are fixedly installed on the side surface of the reinforcing plate 6. The three guide pipes 12 are evenly distributed circumferentially with the main column 1 as the center. The guide pipes 12 correspond to the mounting seats 10 one by one, and the guide pipes 12 are located directly above the mounting seats 10. The anchor cable 8 enters the guide pipe 12 vertically and passes out from the top of the guide pipe 12. Thus, the anchor cable 8 between the fixed pulley 11 and the guide pipe 12 is kept parallel to the main column 1. A flared opening is arranged at the top of the guide pipe 12, and the aperture of the flared opening gradually increases from bottom to top. Arc chamfers are arranged at the inner edges at both ends of the flared opening. Through the arrangement of the flared opening, the friction between the anchor cable 8 and the top end of the guide pipe 12 is reduced.

[0027] The rotation driving member 9 includes three hydraulic cylinders 901. The three hydraulic cylinders 901 are rotatably connected to the upper surface of the reinforcing plate 6. An L-shaped plate 902 is fixedly installed at the output end of the hydraulic cylinder 901. A sliding column 903 is fixedly installed at the bottom of the L-shaped plate 902. Three guide frames 904 are fixedly arranged in an array at the top of the winding wheel 7. The sliding column 903 corresponds to the guide frame 904 one by one, and the sliding column 903 is slidably connected inside the guide frame 904. On this semi-submersible platform, sensors such as vertical accelerometers can be set to monitor the acceleration change of the semi-submersible platform in the vertical direction, and through integral operation, the displacement of the semi-submersible platform in the vertical direction is calculated. The vertical accelerometer is connected to a computer, and then connected to the computer through the hydraulic cylinder 901. The output end of the hydraulic cylinder 901 is controlled by the computer to extend and retract. By simultaneously extending and retracting the output ends of the three hydraulic cylinders 901, the sliding column 903 is driven to slide inside the guide frame 904, and the guide frame 904 and the winding wheel 7 are pushed to rotate, so as to wind or release the anchor cable 8 through the winding wheel 7.

[0028] During the working process, the output ends of the three hydraulic cylinders 901 extend and retract simultaneously, driving the sliding column 903 to slide inside the guiding frame 904. At the same time, the sliding column 903 exerts a thrust on the guiding frame 904 and pushes the guiding frame 904 and the winding wheel 7 to rotate, so as to wind or release the cable anchor 8 through the winding wheel 7. Thus, the length of the cable anchor 8 between the circular base 3 and the seabed is adjusted to adapt to the up-and-down floating of the semi-submersible platform on the sea surface.

[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Semi-submersible platform for offshore wind power installation, comprising a main column (1) and three secondary columns (2), the three secondary columns (2) being circumferentially and evenly spaced around the main column (1), characterized in that: A circular base (3) is fixedly installed at the bottom of the main column (1). Three connecting arms (4) are fixedly arranged in an array on the circumferential surface of the circular base (3). The connecting arms (4) are inclined, and the inner end of each connecting arm is lower than the outer end. The three secondary columns (2) are respectively fixedly installed at the top of the outer ends of the three connecting arms (4). A reinforcing plate (6) is fixedly installed at the top of the three secondary columns (2). The main column (1) is fixedly penetrated through the center of the reinforcing plate (6). A winding wheel (7) is sleeved on the outer side of the main column (1). Three groups of anchor cables (8) are fixedly arranged in an array on the circumferential surface of the winding wheel (7). The bottom ends of the anchor cables (8) are fixed to the seabed. A rotation driving member (9) is connected to the top of the winding wheel (7). A cavity one (101) is arranged inside the lower half of the main column (1). A cavity two (201) is arranged inside the lower half of the secondary column (2). A cavity three (301) is arranged inside the circular base (3). A cavity four (401) is arranged inside the lower half of the connecting arm (4). The cavity one (101) and the cavity four (401) are both communicated with the cavity three (301), and a ballast tank is formed through the cavity one (101), the cavity three (301) and the cavity four (401). Seawater is filled in the ballast tank.

2. The semi-submersible platform based on offshore wind power installation according to claim 1, characterized in that: The reinforcing plate (6) is in a "human" shape. The three secondary columns (2) are respectively fixed on the lower surfaces of the three end parts of the reinforcing plate (6).

3. The semi-submersible platform based on offshore wind power installation according to claim 2, characterized in that: Three mounting seats (10) are fixedly arranged in an array on the circumferential surface of the circular base (3). Each mounting seat (10) is located between two adjacent connecting arms (4). Two fixed pulleys (11) are rotatably connected inside the mounting seat (10). The anchor cable (8) passes between the two fixed pulleys (11). Three guide pipes (12) are fixedly installed on the side surface of the reinforcing plate (6). The three guide pipes (12) are evenly distributed at circumferential intervals with the main column (1) as the center. The guide pipes (12) correspond to the mounting seats (10) one by one, and the guide pipes (12) are located directly above the mounting seats (10). The anchor cable (8) enters the guide pipe (12) vertically and passes out from the top of the guide pipe (12).

4. The semi-submersible platform based on offshore wind power installation according to claim 3, wherein: A flared opening is arranged at the top of the guide pipe (12). The aperture of the flared opening gradually increases from bottom to top. Arc chamfers are arranged on the inner edges at both ends of the flared opening.

5. The semi-submersible platform based on offshore wind power installation according to claim 1, characterized in that: The rotation driving member (9) includes three hydraulic cylinders (901). The three hydraulic cylinders (901) are rotatably connected to the upper surface of the reinforcing plate (6). An L-shaped plate (902) is fixedly installed at the output end of the hydraulic cylinder (901). A sliding column (903) is fixedly installed at the bottom of the L-shaped plate (902). Three guide frames (904) are fixedly arranged in an array at the top of the winding wheel (7). The sliding column (903) corresponds to the guide frame (904) one by one, and the sliding column (903) is slidably connected inside the guide frame (904).

6. The semi-submersible platform based on offshore wind power installation according to claim 1, wherein: An inclined strut (5) is fixedly installed between the upper surface of the connecting arm (4) and the circumferential surface of the main column (1).

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