Mooring Tensioner with Steering Device

Abstract

The present invention discloses a mooring tensioner with a steering device, which comprises a base. A tensioner is connected to the base through a tongue plate. One end of the tensioner is provided with a hollow structure for the chain to pass through. The tensioner includes a main body structure. A chain guiding module is arranged in the middle of the main body structure. A chain stopping module is arranged at one end of the main body structure. A plurality of sacrificial anodes are symmetrically arranged on both sides of the main body structure. The design of the present invention is reasonable, the performance is reliable, the operation difficulty is small, the mooring configuration of the floating wind turbine is simplified, the installation efficiency is effectively improved, the equipment and installation costs are reduced, the existing fairlead structure of the floating body can be utilized, the mooring positioning effect is good, the purposes of bidirectional rotation and rapid pre-tensioning are achieved, and it is beneficial to large-scale installation operations.

Description

Technical Field

[0001] The present invention relates to the technical field of tensioners for mooring systems of offshore floating wind turbines, and particularly to a mooring tensioner with a steering device. Background Art

[0002] Mooring chains are important equipment for mooring and positioning of offshore floating systems. Among them, steel chains have become an essential component in mooring systems due to their excellent load-bearing capacity, fatigue resistance, and wear resistance. The upper end of the mooring chain is generally connected to the platform through a windlass and a chain stopper to adjust the length of the mooring chain to reach the set tension force. Traditional mooring systems use windlasses and chain stoppers for pre-tensioning, but they are costly and complex to operate, and are not suitable for mooring systems of offshore floating wind turbines. For floating production platforms or floating wind turbines, there is also a method to achieve pre-tensioning through the cooperation of a crane and a chain stopper, but this method has high requirements for the installation ship, high cost, great difficulty, and is not conducive to large-scale installation operations. On the other hand, with long-term offshore engineering operations, the chain is continuously affected by lateral forces of irregular swinging during use, resulting in a certain angle of deflection, which brings non-axial forces to the joint between the chain and the platform (usually a connecting shackle), affecting its service life. The present invention provides a mooring tensioner with a steering device, which can be installed based on the existing fairlead structure of offshore floating bodies, and at the same time has the functions of rotating and tightening the chain in two directions, which can simplify the mooring configuration of floating wind turbines and improve the installation efficiency. Summary of the Invention

[0003] The purpose of the present invention is to solve the above technical problems, and provide a mooring tensioner with a steering device, which can effectively improve the installation efficiency, reduce the equipment and installation costs, and achieve the purpose of bidirectional rotation and rapid pre-tensioning.

[0004] In order to achieve the above technical purpose and meet the above technical requirements, the technical solution adopted by the present invention is: a mooring tensioner with a steering device, including a base, characterized in that: the bottom of the base is connected to a floating body, a tongue plate is connected to the base through pin A, the other end of the tongue plate is connected to a tensioner through pin B, one end of the tensioner is provided with a hollow structure for the chain to pass through, the tensioner includes a main body structure, a chain guiding module is arranged in the middle of the main body structure, a chain stopping module is arranged at one end of the main body structure, a protective cover is arranged on the main body structure above the chain stopping module, and a plurality of sacrificial anodes are symmetrically arranged on both sides of the main body structure; the chain passes through the open end of the tensioner, the bottom of the chain stopping module, the bottom of the chain guiding module, and is led out from one side of the chain guiding module.

[0005] Preferably: the chain guiding module includes a sprocket, the sprocket is connected to the main body structure through pin C, and a wing for preventing the chain from slipping out is arranged outside the sprocket.

[0006] Preferably, the chain stopper module includes a chain stopper, which is connected to the main structure through a pin D. On both sides of the upper end of the chain stopper, ear plates are symmetrically arranged. One end of a spring is connected to the ear plate, and the other end is connected to the main structure.

[0007] Preferably, the bottom of the chain stopper is of an open type. An arc-shaped groove for the chain to pass through is arranged on the outer side of the chain stopper, and a chain stopping groove is arranged on the inner side.

[0008] Preferably, the base is composed of horizontal and vertical steel plates by welding. The bottom of the base is welded to the floating body, and pin holes for connecting the tongue plate are arranged on the base.

[0009] Preferably, the base is horizontally fixed on the floating body or vertically fixed on the floating body.

[0010] Preferably, the tongue plate is a tongue-shaped connecting piece. One end is a hollow cylinder for connecting to the base, and the other end is provided with a pin hole for connecting to the tensioner.

[0011] Preferably, both ends of the pin A are connected to the base through washers A, and both ends of the pin B are connected to the tensioner through washers B to ensure the rotation of each component.

[0012] Preferably, the rotation angle of the tensioner in the horizontal direction is set to ±90°.

[0013] Preferably, with the horizontal direction as 0° and rotating downward, the rotation angle of the tensioner in the vertical direction is set to 0 - 90°.

[0014] Preferably, the pin A is set to a stepped structure with a thin middle and thick ends. Bushings are arranged at the connections between the inner circles at both ends of the tongue plate and the thick ends of the pin A.

[0015] Compared with the traditional structure, the beneficial effects of the present invention are as follows:

[0016] 1. The present invention is reasonably designed and reliable in performance. It simplifies the mooring configuration of the floating wind turbine. By connecting the base and the tensioner through the tongue plate, the tensioner simultaneously has the functions of rotating and tightening the chain in both the horizontal and vertical directions, has relatively low requirements for the installation ship, small operation difficulty, effectively improves the installation efficiency, reduces the equipment and installation costs, realizes the purpose of bidirectional rotation and rapid pre-tensioning, and is beneficial to large-scale installation operations.

[0017] 2. The present invention can utilize the existing fairlead structure of the floating body, and combine the tongue plate, the chain stopper and the fairlead to form a tensioner that simultaneously has the functions of bidirectional rotation and tensioning. The mooring positioning effect is good, and the service life of the fairlead is extended.

[0018] 3. When the base is vertically fixed, the main shaft of the tongue plate can be installed by utilizing gravity, which reduces the installation difficulty and cost, improves the installation efficiency, and is beneficial to large-scale installation operations.

[0019] 4. The chain stopper uses a spring for reset, has the functions of upward stretching and reverse automatic locking, and can achieve automatic tensioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 One of the schematic structural diagrams of the embodiment of the present invention;

[0021] Figure 2 Another schematic structural diagram of the embodiment of the present invention;

[0022] Figure 3 Schematic structural diagram of the chain stopping module of the present invention;

[0023] Figure 4 Schematic structural diagram of the chain stopper of the present invention;

[0024] Figure 5 Schematic installation diagram of the present invention;

[0025] In the figure: 1. Base, 2. Tongue plate, 3. Tensioner, 31. Chain guiding module, 311. Sprocket, 312. Protective wing, 32. Chain stopping module, 321. Chain stopper, 3211. Ear plate, 3212. Arc groove, 3213. Chain stopping groove, 322. Spring, 33. Protective cover, 34. Main body structure, 4. Chain, 5. Sacrificial anode, 6. Pin A, 7. Pin B, 8. Floating body connection, 9. Lower chain link connection, 10. Tugboat towing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The present invention will be further described below. Embodiment 1

[0027] A mooring tensioner with a steering device, including a base 1, characterized in that: the bottom of the base 1 is connected to a floating body, the base 1 is connected to a tongue plate 2 through a pin A 6, the other end of the tongue plate 2 is connected to a tensioner 3 through a pin B 7, one end of the tensioner 3 is provided with a hollow structure for the chain 4 to pass through, the tensioner 3 includes a main body structure 34, a chain guiding module 31 is arranged in the middle of the main body structure 34, a chain stopping module 32 is arranged at one end of the main body structure 34, a protective cover 33 is arranged on the main body structure 34 above the chain stopping module 32, and a plurality of sacrificial anodes 5 are symmetrically arranged on both sides of the main body structure 34; the chain 4 passes through the open end of the tensioner 3, the bottom of the chain stopping module 32, the bottom of the chain guiding module 31, and is led out from one side of the chain guiding module 31.

[0028] In this preferred embodiment, the chain guiding module 31 includes a sprocket 311, and the sprocket 311 is connected to the main body structure 34 through a pin C.

[0029] In this preferred embodiment, the chain stop module 32 includes a chain stopper 321. The chain stopper 321 is connected to the main body structure 34 through a pin shaft D. On both sides of the upper end of the chain stopper 321, ear plates 3211 are symmetrically arranged. One end of a spring 322 is connected to the ear plate 3211, and the other end is connected to the main body structure 34.

[0030] In this preferred embodiment, the bottom of the chain stopper 321 is of an open type. An arc-shaped groove 3212 for facilitating the passing of the chain is arranged on the outside of the chain stopper 321, and a chain stop groove 3213 is arranged on the inside.

[0031] In this preferred embodiment, the base 1 is composed of horizontal and vertical steel plates by welding. The bottom of the base 1 is welded to the floating body, and pin holes for connecting the tongue plate are arranged on the base 1.

[0032] In this preferred embodiment, the base 1 is horizontally fixed on the floating body, and the center line of the tensioner is perpendicular to the axial center lines of the tongue plate and the base.

[0033] In this preferred embodiment, the tongue plate 2 is a tongue-shaped connecting piece. One end is a hollow cylinder for connecting to the base 1, and the other end is provided with a pin hole for connecting to the tensioner 3.

[0034] In this preferred embodiment, both ends of the pin shaft A6 are connected to the base 1 through washers A, and both ends of the pin shaft B7 are connected to the tensioner 3 through washers B to ensure the rotation of each component.

[0035] In this preferred embodiment, a cross-shaped chain guiding hole is arranged at the open end on the right side of the main body structure 34.

[0036] In this preferred embodiment, the rotation angle of the tensioner 3 in the horizontal direction is set to ±90°. Rotating downward with the horizontal direction as 0°, the rotation angle of the tensioner in the vertical direction is set to 0 - 90°. Embodiment 2

[0037] A mooring tensioner with a steering device includes a base 1, and is characterized in that: the bottom of the base 1 is connected to a floating body. A tongue plate 2 is connected to the base 1 through a pin shaft A6. The other end of the tongue plate 2 is connected to a tensioner 3 through a pin shaft B7. One end of the tensioner 3 is of a hollow structure to facilitate the passing of a chain 4. The tensioner 3 includes a main body structure 34. A chain guiding module 31 is arranged in the middle of the main body structure 34. A chain stop module 32 is arranged at one end of the main body structure 34. A protective cover 33 is arranged on the main body structure 34 above the chain stop module 32. A plurality of sacrificial anodes 5 are symmetrically arranged on both sides of the main body structure 34; the chain 4 passes through the open end of the tensioner 3, the bottom of the chain stop module 32, the bottom of the chain guiding module 31, and is led out from one side of the chain guiding module 31.

[0038] In this preferred embodiment, a guard wing 312 for preventing the chain from slipping out is provided on the outer side of the sprocket 311, which has a better covering effect and can effectively prevent the chain from slipping out.

[0039] In this preferred embodiment, the chain stop module 32 includes a chain stopper 321. The chain stopper 321 is connected to the main body structure 34 through a pin shaft D. On both sides of the upper end of the chain stopper 321, ear plates 3211 are symmetrically provided. One end of a spring 322 is connected to the ear plate 3211, and the other end is connected to the main body structure 34.

[0040] In this preferred embodiment, the bottom of the chain stopper 321 is of an open type. An arc-shaped groove 3212 for facilitating the chain to pass through is provided on the outer side of the chain stopper 321, and a chain stop groove 3213 is provided on the inner side.

[0041] In this preferred embodiment, the base 1 is composed of horizontal and vertical steel plates by welding. The bottom of the base 1 is welded to the floating body, and pin holes for connecting the tongue plate are provided on the base 1.

[0042] In this preferred embodiment, the base 1 is vertically fixed on the floating body, and the central axis of the tensioner is in the same plane as the axial centerlines of the tongue plate and the base.

[0043] In this preferred embodiment, the tongue plate 2 is a tongue-shaped connecting piece. One end is a hollow cylinder for connecting to the base 1, and the other end has a pin hole for connecting to the tensioner 3.

[0044] In this preferred embodiment, the pin shaft A6 is provided with a stepped structure that is thin in the middle and thick at both ends. Bushings are provided at the connections between the inner circles at both ends of the tongue plate 2 and the thick heads of the pin shaft A6. A lifting lug for facilitating installation is provided at the upper end of the pin shaft A6.

[0045] In this preferred embodiment, the rotation angle of the tensioner 3 in the horizontal direction is set to ±90°. Rotating downward with the horizontal direction as 0°, the rotation angle of the tensioner in the vertical direction is set to 0 - 90°.

[0046] In this preferred embodiment, a cross-shaped chain guide hole is provided at the open end on the right side of the main body structure.

[0047] During specific implementation, the base 1 can be pre-welded on the floating body, and then the tongue plate 2 and the tensioner 3 can be installed thereon; or by using the existing fairlead structure of the offshore floating body, the tongue plate 2, the chain stopper 321 and the fairlead can be combined to form a tensioner that simultaneously has the functions of bidirectional rotation and tensioning. During installation, the main shaft of the tongue plate is vertically arranged, and a lifting lug is provided on the main shaft, and gravity can be utilized for installation, reducing the installation difficulty.

[0048] During use, the installation vessel pulls the chain 4 all the way to a position close to the tensioner 3. The chain 4 is passed through the cross-shaped chain guide hole at the open end of the tensioner 3, the bottom of the chain stopper module 32, and the bottom of the sprocket 311 and led out from the sprocket side by wire rope traction. A protective wing is added outside the sprocket 311, and the covering effect is better, which can effectively prevent the chain from slipping out. The lower end of the chain is connected to the lower link, and the upper end is towed by the towing wire rope of the tugboat to pre-tension the entire mooring chain. The chain stopper 321 is reset by the spring 322, and has the functions of forward stretching and reverse automatic locking, which can realize automatic tensioning. After locking, the chain stopper completely bears the tension of the anchor leg. The rotation angle of the combination in the horizontal direction is ±90°, and the rotation angle in the vertical direction is 0~90° (rotating downward with the horizontal direction as 0°), which can achieve the purpose of bidirectional rotation and rapid pre-tensioning, effectively reduce the installation difficulty, improve the installation efficiency, reduce the cost, and the installation difficulty is small, which is beneficial to large-scale installation operations.

[0049] The above embodiments of the present invention are merely examples clearly illustrating the present invention, but are not used to limit the protection scope of the present invention. All equivalent technical solutions also belong to the scope of the present invention. The patent protection scope of the present invention shall be defined by each claim.

Claims

1. Mooring tensioner with a steering device, including a base (1), Characterized in that: The bottom of the base (1) is connected to a floating body. A tongue plate (2) is connected to the base (1) through a pin A (6) and a washer A. The tongue plate (2) is set as a tongue-shaped connecting piece, one end is a hollow cylinder, and the other end is provided with a pin hole. The other end of the tongue plate (2) is connected to a tensioner (3) through a pin B (7) and a washer B. One end of the tensioner (3) is set as a hollow structure for the chain (4) to pass through. The tensioner (3) includes a main body structure (34). A chain guiding module (31) is arranged in the middle of the main body structure (34). A chain stopping module (32) is arranged at one end of the main body structure (34). A protective cover (33) is arranged on the main body structure (34) above the chain stopping module (32). A number of sacrificial anodes (5) are symmetrically arranged on both sides of the main body structure (34); The chain (4) passes through the open end of the tensioner (3), the bottom of the chain stopping module (32), the bottom of the chain guiding module (31), and is led out from one side of the chain guiding module (31); The chain guiding module (31) includes a sprocket (311). The sprocket (311) is connected to the main body structure (34) through a pin C. A wing (312) for preventing the chain from slipping out is arranged outside the sprocket (311).

2. The mooring tensioner with a steering device according to claim 1, Characterized in that: The chain stopping module (32) includes a chain stopper (321). The chain stopper (321) is connected to the main body structure (34) through a pin D. Ear plates (3211) are symmetrically arranged on both sides of the upper end of the chain stopper (321). One end of a spring (322) is connected to the ear plate (3211), and the other end is connected to the main body structure (34).

3. The mooring tensioner with a steering device according to claim 2, Characterized in that: The bottom of the chain stopper (321) is set as an open type. An arc-shaped groove (3212) for the chain to pass through is arranged outside the chain stopper (321), and a chain stopping groove (3213) is arranged inside.

4. The mooring tensioner with a steering device according to claim 1, Characterized in that: The bottom of the base (1) is welded to the floating body. The base (1) is provided with pin holes for connecting the tongue plate (2).

5. The mooring tensioner with a steering device according to claim 1 or 4, Characterized in that: The base (1) is horizontally fixed on the floating body or vertically fixed on the floating body.

6. The mooring tensioner with a steering device according to claim 1, Characterized in that: A cross-shaped chain guiding hole is arranged at the open end on the right side of the main body structure.

7. The mooring tensioner with a steering device according to claim 1, Characterized in that: The rotation angle of the tensioner (3) in the horizontal direction is set as ±90°. Rotating downward with the horizontal direction as 0°, the rotation angle of the tensioner (3) in the vertical direction is 0~90°.

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