Floating type structure mooring tension control device
By designing a floating structure mooring tension control device including rotating columns and connecting structures, the problem of sharp increase in anchor chain mooring tension in offshore wind power is solved, effective control of mooring tension is achieved, and mooring is improved System safety and the service life of the anchor chain.
Patent Information
- Application Number
- CN202421147299.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-05-24
AI Technical Summary
In offshore wind power, as the water depth increases, the mooring tension of the anchor chain increases sharply, resulting in a harsh service environment, severe wear and short fatigue life of the anchor chain structure, making it difficult to effectively control the mooring tension.
A floating structure mooring tension control device is designed, including a column connected up and down and a connecting structure, which generates torque through the rotation of the column, adjusts the mooring tension of the anchor chain, and controls it within a suitable range.
When the mooring tension is too high, the tension is increased when the mooring tension is too high, the tension is increased when it is too late, the mooring tension of the floating fan is effectively controlled, the safety of the mooring system is improved, and the service life of the anchor chain is extended.
Smart Images
Figure CN222432532U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of offshore wind power, in particular to a floating structure mooring tension control device. Background Art
[0002] Offshore wind energy resources are abundant, clean and efficient, and are an important strategic support for my country's green energy transformation and development. As offshore wind power development moves towards the deep sea, when the water depth is greater than 40m, the construction and development economy of fixed offshore wind turbines has no obvious advantage over floating offshore wind turbines; when the water depth exceeds 60m, floating wind turbines have obvious construction and development economy advantages over fixed offshore wind turbines. The main components of floating wind turbines include wind turbine units, floating structures, mooring systems, dynamic cables, etc. Among them, the utility model relates to a mooring system anchor chain mooring tension control device. The anchor chain can be regarded as a catenary structure with one end fixed and the other end free. Under the action of waves and currents, it reciprocates within the safety envelope surface formed by the amplitude of the anchor chain movement. Under the action of large mooring tension, the service safety of the anchor chain structure is greatly challenged. As the working water depth of floating wind turbines increases, the mooring tension of the anchor chain increases sharply. When the water depth is 100m, the mooring tension can reach 20,000kN (equivalent to about 2,000 tons of force). Under the action of wave and current circulation, the service environment of the anchor chain structure is harsh. Relevant studies at home and abroad have shown that reducing the mooring tension of the anchor chain can effectively reduce the wear of the anchor chain system and increase the fatigue life of the anchor chain structure. In order to prevent and control anchor chain diseases and improve safety, it is imperative to control the mooring tension of the anchor chain. Utility Model Content
[0003] In view of the above-mentioned problems, a floating structure mooring tension control device is provided, which can reduce the mooring tension amplitude to a certain extent when the mooring tension is too large, and increase the mooring tension to a certain extent when the mooring tension is too small, thereby controlling the mooring tension of the floating wind turbine and improving the safety of the mooring system.
[0004] The technical solution adopted by the utility model is: a floating structure mooring tension control device, comprising an upper column and a lower column connected up and down, and a connecting structure, the weight of the lower column is greater than that of the upper column, the connecting structure comprises an upper connecting member movably connected to the upper column, and a lower connecting member movably connected to the lower column, anchor chain connecting points for connecting anchor chains are respectively arranged on the upper connecting member and the lower connecting member, the center of gravity of the upper column is located at the midpoint of the intersection of the straight line formed by the upper column movable connection point and the upper column, and the center of gravity of the lower column is located at the midpoint of the intersection of the straight line formed by the lower column movable connection point and the upper column.
[0005] Furthermore, the upper column and the lower column may be made of high-strength materials, including but not limited to high-strength marine engineering structural steel, high-strength fiber-reinforced synthetic materials, etc.; after adopting the relevant materials, corrosion protection of the marine environment needs to be done well.
[0006] Furthermore, the shapes of the upper and lower cylinders may be cylinders of equal or variable cross-sections, depending on the requirements of mooring tension control and structural stability; if a cylinder of equal cross-section is selected, the cylinder shape includes but is not limited to a cylinder, an elliptical cylinder, a polygonal prism, a cylinder of any convex cross-section, etc.
[0007] Furthermore, the upper column and the lower column are both closed cavity structures; the upper column and the lower column can be integrally cast or welded;
[0008] The upper column may be filled with low-density solid or liquid, including but not limited to air, seawater, etc., depending on the tension of the anchor chain;
[0009] The lower column may be filled with high-density solids or liquids, including but not limited to concrete, seawater, etc., depending on the tension of the anchor chain.
[0010] Further, the upper connecting member includes an upper connecting shaft and an upper connecting rod, wherein the upper connecting shaft refers to a columnar structure hinged to the upper column and located on the outer surface of the column corresponding to the upper column, and is used to connect the upper column and the upper connecting rod;
[0011] The lower connecting member includes a lower connecting shaft and a lower connecting rod. The lower connecting shaft refers to a columnar structure hinged to the lower column and located on the outer surface of the column corresponding to the lower column, and is used to connect the lower column and the lower connecting rod.
[0012] Furthermore, the upper connecting shaft and the lower connecting shaft are fixed to the column by welding, or are integrally molded and cast with the column; the upper connecting shaft and the lower connecting shaft may not be in the same vertical section of the column.
[0013] Furthermore, the upper connecting rod is a curved rod-shaped structure with one side connected to the upper connecting shaft and the other side connected to the anchor chain.
[0014] Furthermore, the lower connecting rod is a curved rod-shaped structure with one side connected to the lower connecting shaft and the other side connected to the anchor chain.
[0015] Furthermore, the upper connecting rod and the lower connecting rod may be solid or hollow structures, and the connecting rod and the connecting shaft may rotate relative to each other at the connection parts with the column, but the connecting rod and the connecting shaft cannot move relative to each other.
[0016] Furthermore, the upper connecting rod and the lower connecting rod each include an anchor chain connection point, and the structure is used to connect the anchor chain and ensure that the anchor chain does not slide along the connecting rod axis.
[0017] Furthermore, the upper connecting rod and the lower connecting rod are connected to the anchor chain via the anchor chain connection point, and can be hinged or fixedly connected, that is, the connecting rod and the anchor chain cannot move relative to each other.
[0018] The mooring tension control device of the utility model needs to control the anchor chain tension to maintain a certain level during installation. After installation, when the mooring tension is too large, the column of the utility model will rotate, causing the upper connecting shaft to be pulled down, while the lower connecting shaft to be lifted up. Since the center of gravity of the column is not at the geometric center, a torque will be generated when the column rotates to offset the effect of the mooring tension, thereby achieving the effect of suppressing the mooring tension. When the mooring tension is too small, the column of the utility model will also rotate, causing the upper connecting shaft to be lifted up, while the lower connecting shaft to be pulled down. When the column rotates, a torque will be generated that is superimposed on the effect of the mooring tension, thereby achieving the effect of increasing the mooring tension.
[0019] The beneficial effect of the utility model is that, through the column composed of the upper column and the lower column and the connection structure movably connected to the upper column and the lower column respectively, the mooring tension is reduced to a certain extent when the mooring tension is too large, and the mooring tension is increased to a certain extent when the mooring tension is too small, thereby controlling the mooring tension of the floating structure and improving the safety of the mooring system. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 A three-dimensional view of the mooring tension control device;
[0021] Figure 2 This is a top view of the mooring tension control device;
[0022] Figure 3 It is a side view of the mooring tension control device;
[0023] Figure 4 It is a schematic diagram of the position of the mooring tension control device when the mooring tension is too small;
[0024] Figure 5 Schematic diagram of the position of the mooring tension control device when the mooring tension is too large.
[0025] Figure numerals: upper column 1, lower column 2, connecting structure 3, upper connecting member 31, upper connecting shaft 311, upper connecting rod 312, lower connecting member 32, lower connecting shaft 321, lower connecting rod 322, anchor chain connection point 33, upper anchor chain connection point 331, lower anchor chain connection point 332, movable connection points 313, 314, 323, 324, center of gravity 4, 5. DETAILED DESCRIPTION
[0026] like Figure 1 to Figure 3 As shown, this embodiment is a floating structure mooring tension control device, comprising an upper column 1 and a lower column 2 connected in upper and lower directions, and a connecting structure 3, wherein the weight of the lower column 2 is greater than that of the upper column 1, and the connecting structure 3 comprises an upper connecting member 31 movably connected to the upper column 1, and a lower connecting member 32 movably connected to the lower column 2, and anchor chain connecting points 33 for connecting anchor chains are respectively arranged on the upper connecting member 31 and the lower connecting member 32, and the center of gravity 4 of the upper column 1 is located at the midpoint of the intersection of the straight line formed by the movable connection point of the upper column 1 and the upper column 1, and the center of gravity 5 of the lower column 2 is located at the midpoint of the intersection of the straight line formed by the movable connection point of the lower column 2 and the upper column 2.
[0027] As an optional embodiment, the upper column 1 and the lower column 2 can be made of high-strength materials, including but not limited to high-strength marine engineering structural steel, high-strength fiber-reinforced synthetic materials, etc.; after using the relevant materials, corrosion protection against the marine environment needs to be done well.
[0028] As an optional embodiment, the shapes of the upper column 1 and the lower column 2 can be uniform cross-section or variable cross-section columns according to the requirements of mooring tension control and structural stability; if uniform cross-section columns are selected, the column shapes include but are not limited to cylinders, elliptical cylinders, polygonal prisms, arbitrary convex cross-section columns, etc.
[0029] As an optional embodiment, the upper column 1 and the lower column 2 are both closed cavity structures;
[0030] The upper column 1 and the lower column 2 can be integrally cast or welded;
[0031] The upper column 1 may be filled with low-density solids or liquids, including but not limited to air, seawater, etc., depending on the tension of the anchor chain;
[0032] The lower column 2 may be filled with high-density solid or liquid, including but not limited to concrete, seawater, etc., depending on the tension of the anchor chain.
[0033] As an optional embodiment, the upper connecting member 31 includes an upper connecting shaft 311 and an upper connecting rod 312. The upper connecting shaft 311 is a columnar structure hinged to the upper column 1 and located on the outer surface of the column corresponding to the upper column 1, and is used to connect the upper column 1 and the upper connecting rod 312.
[0034] There are two active connection points 313 and 314 between the upper connection shaft 311 and the upper column 1. The straight line formed by the active connection points of the upper column 1 refers to the connecting line of the two active connection points 313 and 314.
[0035] The lower connecting member 32 includes a lower connecting shaft 321 and a lower connecting rod 322. The lower connecting shaft 321 is a columnar structure hinged to the lower column 2 and located on the outer surface of the column corresponding to the lower column 2, and is used to connect the lower column 2 and the lower connecting rod 322.
[0036] There are two active connection points 323 and 324 between the lower connection shaft 321 and the lower column 2 , and the straight line formed by the active connection points of the lower column 2 refers to the connecting line of the two active connection points 323 and 324 .
[0037] As an optional embodiment, the upper connecting shaft 311 and the lower connecting shaft 321 may not be in the same vertical section of the column.
[0038] As an optional embodiment, the upper connecting rod 312 is a curved rod-shaped structure with one side connected to the upper connecting shaft 311 and the other side connected to the anchor chain.
[0039] As an optional embodiment, the lower connecting rod 322 is a curved rod-shaped structure with one side connected to the lower connecting shaft 321 and the other side connected to the anchor chain.
[0040] As an optional embodiment, the upper connecting rod 312 and the lower connecting rod 322 may be solid or hollow structures, and the connecting rod and the connecting shaft may rotate relative to each other at the connection parts with the column, but the connecting rod and the connecting shaft cannot move relative to each other.
[0041] As an optional embodiment, the upper connecting rod 312 and the lower connecting rod 322 further include an anchor chain connection point 33 respectively, and the structure is used to connect the anchor chain and ensure that the anchor chain does not slide along the connecting rod axis.
[0042] As an optional embodiment, the upper connecting rod 312 and the lower connecting rod 322 are connected to the anchor chain through the upper anchor chain connection point 331 and the lower anchor chain connection point 332, and can be hinged or fixedly connected, that is, the connecting rod and the anchor chain cannot move relative to each other.
[0043] In the mooring tension control device, the center of gravity 4 of the upper column 1 is located at the midpoint of the intersection of the straight line where the upper connecting axis 311 is located and the upper column 1; the center of gravity 5 of the lower column 2 is located at the midpoint of the intersection of the straight line where the lower connecting axis 321 is located and the upper column 2.
[0044] According to the requirements of the mooring tension control range, the center of gravity 4 of the upper column 1 and the center of gravity 5 of the lower column 2 are usually not in the same vertical plane. As the required mooring tension control range increases, the projected distance between the center of gravity 4 and the center of gravity 5 of the upper column 1 and the lower column 2 on the water surface needs to be increased in order to provide a larger restoring torque and torsional torque.
[0045] The floating structures to which the mooring tension control device of the utility model is applicable include but are not limited to floating wind turbines, floating photovoltaic structures, etc.
[0046] Embodiment 1 of the present invention: For a mooring system of an offshore wind power project where the mooring tension is too small, such as Figure 4 As shown, when the mooring tension of the anchor chain is too small, the mooring tension control device will rotate clockwise along the structural metacentric axis under the action of its own weight and buoyancy, and the upper column 1 and the lower column 2 will rotate synchronously, driving the upper connecting rod 312 and the lower connecting rod 322 to rotate synchronously, causing the anchor chains connected to the upper anchor chain connection point 331 and the lower anchor chain connection point 332 to be stretched synchronously, thereby achieving the effect of increasing the mooring tension to a certain extent.
[0047] Embodiment 2 of the present invention: For a mooring system of an offshore wind power project with excessive mooring tension, such as Figure 5 As shown, when the mooring tension of the anchor chain is too large, the mooring tension control device will rotate counterclockwise along the structural metacentric axis under the action of the mooring tension, and the upper column 1 and the lower column 2 will rotate synchronously. Since the gravity of the lower column 2 is relatively large and heavy, and the mass distribution of the mooring tension control device composed of the upper column 1 and the lower column 2 is uneven, when the upper column 1 and the lower column 2 rotate synchronously, a torque in the opposite direction to the combined torque of the mooring tension will be generated, thereby reducing the mooring tension to a certain extent.
[0048] According to the description and drawings of the present invention, those skilled in the art can easily manufacture or use the floating structure mooring tension control device of the present invention, and can produce the positive effects recorded in the present invention.
[0049] The above description is only a preferred embodiment of the present utility model and does not limit the present utility model in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.
Claims
1. A floating structure mooring tension control device, characterized in that: It comprises an upper column and a lower column connected in upper and lower parts, and a connecting structure, wherein the weight of the lower column is greater than that of the upper column, and the connecting structure comprises an upper connecting piece movably connected to the upper column, and a lower connecting piece movably connected to the lower column, and anchor chain connecting points for connecting anchor chains are respectively arranged on the upper connecting piece and the lower connecting piece, the center of gravity of the upper column is located at the midpoint of the intersection of the straight line formed by the movable connecting point of the upper column and the upper column, and the center of gravity of the lower column is located at the midpoint of the intersection of the straight line formed by the movable connecting point of the lower column and the upper column.
2. A floating structure mooring tension control device according to claim 1, characterized in that: The upper column and the lower column are made of high-strength material.
3. A floating structure mooring tension control device according to claim 1, characterized in that: The upper column and the lower column are integrally cast or welded.
4. A floating structure mooring tension control device according to claim 1, characterized in that: The upper cylinder and the lower cylinder are in the shape of cylinders with equal cross-section or variable cross-section.
5. A floating structure mooring tension control device according to claim 1, characterized in that: The upper cylinder and the lower cylinder are both closed cavity structures; the upper cylinder is filled with low-density solid or liquid, and the lower cylinder is filled with high-density solid or liquid.
6. A floating structure mooring tension control device according to claim 1, characterized in that: The upper connecting member includes an upper connecting shaft and an upper connecting rod, wherein the upper connecting shaft is hinged to the upper column and is used to connect the upper column and the upper connecting rod; the lower connecting member includes a lower connecting shaft and a lower connecting rod, wherein the lower connecting shaft is hinged to the lower column and is used to connect the lower column and the lower connecting rod.
7. A floating structure mooring tension control device according to claim 6, characterized in that: The upper connecting rod is a curved rod-shaped structure with one side connected to the upper connecting shaft and the other side connected to the anchor chain.
8. A floating structure mooring tension control device according to claim 6, characterized in that: The lower connecting rod is a curved rod-shaped structure with one side connected to the lower connecting shaft and the other side connected to the anchor chain.
9. A floating structure mooring tension control device according to claim 6, characterized in that: The upper connecting rod and the lower connecting rod are solid or hollow structures.
10. A floating structure mooring tension control device according to claim 6, characterized in that: The upper connecting rod and the lower connecting rod are hinged or fixedly connected to the anchor chain.