Floating type wind power mooring tensioner capable of being finely adjusted

Abstract

The invention discloses a floating type wind power mooring tensioner capable of being finely adjusted, and relates to the technical field of floating type wind power mooring connection. One end of a support is connected with a base through a rotating head, the other end of the support is connected with a chain stopping module through a connecting assembly, and a chain can freely pass when moving from a chain guide block to a guide chain wheel; and the connecting assembly is connected with a tensioning oil cylinder and a fixing nut, the chain stopping module and the chain are driven by the tensioning oil cylinder to move to finely adjust the length of the chain, and therefore fine adjustment of the length and tension of the mooring anchor leg is achieved. A locking nut is arranged at the tail end of the tensioning oil cylinder, and the length of the mooring anchor leg is locked by adjusting the fixing nut and the locking nut. The device has the functions of rotating in two directions and finely adjusting the size of the chain at the same time, high-precision adjustment of the pre-tension of the mooring system is achieved, the installation efficiency is improved, and the risk that the anchor leg is broken is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of floating wind power mooring connection, and in particular to a fine-adjustable floating wind power mooring tensioner. Background Art

[0002] Mooring chain is an important equipment for offshore floating mooring and positioning. Among them, steel chain has become an indispensable component in the mooring system due to its excellent load-bearing capacity, fatigue resistance and wear resistance. The upper end of the mooring chain is generally connected to the platform through an anchor windlass and a chain stopper, which is used to adjust the length of the mooring chain to achieve the set tension. During use, the chain will produce a certain angle of deflection, which will bring non-axial force to the joint between the chain and the platform (usually the connecting shackle), affecting its service life. Therefore, in the offshore industry, a tensioner with a universal joint is usually used to offset the deflection of the chain so that it can meet the needs of long-term mooring. On the other hand, the existing tensioner uses a sprocket with a chain stopper module to adjust the length and tension, but the adjustment length is at least one chain link each time. When the nominal diameter of the chain link is large, such as a 200mm chain link, the adjustment length reaches 800mm at a time. For some mooring systems that are sensitive to length, there are problems such as low adjustment accuracy and uneven tension, which may cause the mooring force to be concentrated on a specific anchor leg, exceeding the design load and causing breakage. Summary of the invention

[0003] The purpose of the present invention is to solve the above technical problems and provide a fine-tunable floating wind power mooring tensioner to achieve high-precision adjustment of the pre-tension of the mooring system.

[0004] In order to achieve the above technical objectives and meet the above technical requirements, the technical solution adopted by the present invention is: a fine-adjustable floating wind power mooring tensioner, including a base and a bracket, one end of the bracket is connected to the base through a rotating head, and the other end is connected to the chain stop module through a connecting assembly, a chain guide block is arranged at the bottom of the chain stop module, the chain passes through the chain guide block, the chain stop module, and the middle part of the bracket and is led out from the side of the guide chain wheel, when the chain moves from the chain guide block to the guide chain wheel, it can pass freely, and when it moves in the reverse direction, it is automatically locked under the action of the chain stop module, so as to realize the coarse adjustment pre-tensioning of the chain, the connecting assembly is connected with a tensioning cylinder and a fixing nut, wherein the tensioning cylinder includes an upper tensioning cylinder and a lower tensioning cylinder, and the fixing nut includes an upper fixing nut and a lower fixing nut, the tensioning cylinder drives the chain stop module and the chain to move to fine-tune the chain length, thereby realizing the fine adjustment of the length and tension of the mooring anchor leg, and a locking nut is arranged at the end of the tensioning cylinder, and the locking of the mooring anchor leg length is realized by adjusting the fixing nut and the locking nut.

[0005] Preferably: the connecting assembly includes connecting rod A, connecting rod B, connecting rod C, and connecting rod D, the connecting rod A passes through the chain stopping module, the bracket is connected to the upper tensioning cylinder, the connecting rod B passes through the chain stopping module, the bracket is provided with an upper fixing nut, the connecting rod C passes through the chain stopping module, the bracket is connected to the lower tensioning cylinder, and the connecting rod D passes through the chain stopping module, the bracket is provided with a lower fixing nut.

[0006] Preferably, the upper tensioning cylinder and the lower tensioning cylinder are respectively located on both sides of the center line of the bracket and are arranged diagonally, and the upper fixing nut and the lower fixing nut are respectively located on both sides of the center line of the bracket and are arranged diagonally.

[0007] Preferably: the rotating head is integrally cast or forged, with connecting shafts at both ends, the connecting shafts are provided with self-lubricating bearings, and the rotating head is connected to the base and the bracket through the self-lubricating bearings, so that the tensioner has the function of rotating and tightening the chain in both horizontal and vertical directions.

[0008] Preferably: one end of the rotating head is a hollow dumbbell-shaped structure, and the other end is provided with an axial hole. The rotating head is connected to the base and the bracket through a pin and a bearing, so that the tensioner has the function of rotating and tightening the chain in both horizontal and vertical directions.

[0009] Preferably: the chain stopping module comprises a support block, a cross-shaped chain guide hole is arranged at the center of the support block, connecting rod mounting holes are arranged at the four corners, a chain stopping assembly is arranged on one side of the support block, and a trumpet-shaped chain guide block is arranged on the other side, and the trumpet-shaped chain guide hole is arranged in the chain guide block.

[0010] Preferably: the chain stop assembly includes evenly distributed chain stop blocks A, B, C and D, and the horizontal chain links are locked by the relative chain stop blocks A and C, and the vertical chain links are locked by the relative chain stop blocks B and D.

[0011] Preferably: the chain stop block A, chain stop block B, chain stop block C, and chain stop block D are respectively provided with an arc groove corresponding to the outer circle of the chain ring in the middle part of the side close to the chain ring. During mooring adjustment, when the transverse chain ring falls into the arc groove, the chain stop block A and the chain stop block C automatically reset and lock under the action of their own weight, spring elastic force or hydraulic drive; when the vertical chain ring falls into the arc groove, the chain stop block B and the chain stop block D automatically reset and lock under the action of their own weight, spring elastic force or hydraulic drive.

[0012] Compared with the traditional structure, the beneficial effects of the present invention are as follows: the structural design is reasonable, and the coarse adjustment and fine adjustment of the chain length are achieved through the chain stop module and the tensioning cylinder, so that the tensioner has the functions of rotating in two directions and fine-tuning the chain size at the same time, realizing high-precision adjustment of the pre-tension of the mooring system, improving the installation efficiency, solving the problems of low adjustment accuracy and unbalanced tension of the mooring system, reducing the risk of anchor leg breakage, and having high practical value; it can be used for the size and tension adjustment of catenary, semi-tensioned or tensioned mooring systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the chain stopping module structure of the present invention; Figure 3 This is a diagram of the chain locking state of the present invention; In the figure: 1. base, 2. rotating head, 3. bracket, 4. guide chain wheel, 5. connecting assembly, 51. connecting rod A, 52. connecting rod B, 53. connecting rod C, 54. connecting rod D, 6. chain stop module, 61. support block, 62. chain stop block A, 63. chain stop block B, 64. chain stop block C, 65. chain stop block D, 651. arc groove, 7. chain guide block, 8. fixing nut, 9. tensioning cylinder, 10. locking nut, 11. chain, 111. horizontal chain link, 112. vertical chain link. DETAILED DESCRIPTION

[0014] The present invention will be further described below.

[0015] See attached Figure 1 A fine-adjustable floating wind power mooring tensioner comprises a base 1 and a bracket 3. The bracket 3 transmits tensile loads and provides support for a guide chain wheel 4. One end of the bracket 3 is connected to the base 1 through a rotating head 2, and the other end is connected to a chain stop module 6 through a connecting assembly 5. A chain guide block 7 is provided at the bottom of the chain stop module 6. A chain 11 passes through the chain guide block 7, the chain stop module 6, and the middle of the bracket 3 and is led out from the side of the guide chain wheel 4. When the chain 11 moves from the chain guide block 7 to the guide chain wheel 4, it can pass freely. When it moves in the reverse direction, it is under the action of the chain stop module 6. Automatic locking is used to realize the coarse adjustment pre-tensioning of the chain 11. The connection assembly 5 is connected with a tensioning cylinder 9 and a fixing nut 8, wherein the tensioning cylinder 9 includes an upper tensioning cylinder and a lower tensioning cylinder, and the fixing nut 8 includes an upper fixing nut and a lower fixing nut. The tensioning cylinder 9 drives the chain stop module 6 and the chain 11 to move and fine-tune the length of the chain 11, thereby realizing fine-tuning of the length and tension of the mooring anchor leg. A locking nut 10 is arranged at the end of the tensioning cylinder 9, and the locking of the length of the mooring anchor leg is realized by adjusting the fixing nut 8 and the locking nut 10.

[0016] The connecting assembly 5 includes a connecting rod A51, a connecting rod B52, a connecting rod C53, and a connecting rod D54. The connecting rod A51 passes through the chain stop module 6 and the bracket 3 to connect with the upper tensioning oil cylinder. The connecting rod B52 passes through the chain stop module 6 and the bracket 3 is provided with an upper fixing nut. The connecting rod C53 passes through the chain stop module 6 and the bracket 3 to connect with the lower tensioning oil cylinder. The connecting rod D54 passes through the chain stop module 6 and the bracket 3 is provided with a lower fixing nut. The connecting rod is a transition device between the bracket 3 and the chain stop module 6, and provides structural support for the tensioning oil cylinder 9 and the fixing nut 8.

[0017] The upper tensioning cylinder and the lower tensioning cylinder are respectively located on both sides of the center line of the bracket 3 and are arranged diagonally, and the upper fixing nut and the lower fixing nut are respectively located on both sides of the center line of the bracket 3 and are arranged diagonally.

[0018] In one embodiment, the rotating head 2 is integrally cast or forged, with connecting shafts at both ends, and self-lubricating bearings are pre-installed on the connecting shafts. The rotating head 2 is connected to the base 1 and the bracket 3 respectively through the self-lubricating bearings. The self-lubricating bearings will play a role in wear resistance and reducing the friction coefficient, so that the tensioner has the function of rotating and tightening the chain 11 in both horizontal and vertical directions.

[0019] In another embodiment, one end of the rotating head 2 is a hollow dumbbell-shaped structure, and the other end is provided with an axial hole. The rotating head 2 is connected to the base 1 and the bracket 3 through a pin and a bearing, respectively, so that the tensioner has the function of rotating and tightening the chain 11 in both horizontal and vertical directions.

[0020] like Figure 2 As shown, the chain stop module 6 includes a support block 61, a cross-shaped chain guide hole is provided in the center of the support block 61, and connecting rod mounting holes are provided at four corners. A chain stop assembly is provided on one side of the support block 61, and a chain guide block 7 is provided on the other side. A trumpet-shaped chain guide hole is provided in the chain guide block 7. The chain stop assembly includes evenly distributed chain stop blocks A62, B63, C64, and D65. The horizontal chain ring 111 is locked by the relative chain stop blocks A62 and C64, and the vertical chain ring 112 is locked by the relative chain stop blocks B63 and D65.

[0021] In one of the embodiments, the chain stop blocks A62, B63, C64 and D65 are respectively provided with arc grooves 651 corresponding to the outer circles of the chain rings in the middle of the sides close to the chain rings. During mooring adjustment, when the transverse chain ring 111 falls into the arc groove 651, the chain stop blocks A62 and C64 automatically lock the transverse chain ring 111 under the action of their own weight; when the vertical chain ring 112 falls into the arc groove 651, the chain stop blocks B62 and D65 automatically lock the vertical chain ring 112 under the action of their own weight.

[0022] In another embodiment, four chain stop blocks are connected to the support block 61 through springs. During mooring adjustment, when the chain 11 moves from the chain guide block 7 to the sprocket guide 4, it can pass freely, and the transverse chain link 111 is automatically reset and locked by the rear chain stop block A62 and the chain stop block C64 under the action of the spring force; the vertical chain link 112 is automatically reset and locked by the rear chain stop block B62 and the chain stop block D65 under the action of the spring force.

[0023] In another embodiment, hydraulic cylinders and oil circuits are integrated in the four chain stoppers, and hydraulic joints are arranged on the upper ends of the chain stoppers. During underwater operation, oil is supplied to the hydraulic cylinders in the chain stoppers through the ROV robot, so that the chain stoppers are synchronously opened outwards under hydraulic drive. After the mooring is adjusted in place, the hydraulic system is automatically closed due to oil and pressure loss, and the chain stoppers automatically reset and lock the chain by relying on the elasticity of the spring.

[0024] During specific implementation, the entire base 1 can be welded to the floating structure in advance, and the chain 11 passes through the chain guide block 7, the chain stop module 6, and the middle part of the bracket 3 and is led out from the side of the guide chain wheel 4. The chain guide hole of the chain guide block 7 is used to guide the chain to pass smoothly; when the chain 11 moves from the chain guide block 7 to the guide chain wheel 4, it can pass freely. After the chain 11 passes through the guide chain wheel 4, the chain stop module 6 is automatically locked to achieve the first step of coarse adjustment; then the two tensioning cylinders are started, and the chain stop module 6 and the chain thereon are driven to move through the connecting rod A51 and the connecting rod C53 to achieve the second step of fine adjustment; after the expected length or tension is achieved through the adjustment of the tensioning cylinder, the two fixing nuts 8 are adjusted by the ROV manipulator or other tools to achieve length locking; the tensioning cylinder is closed due to oil and pressure loss, and the locking nut 10 is adjusted by the ROV manipulator or other tools to lock the cylinder, and finally the length and tension of the mooring anchor leg are fine-tuned.

[0025] When the chain 11 needs to be loosened to readjust the length, a reset screw can be set outside the chain stopper to open it by external force or by hydraulic drive, and then the chain is loosened to disengage or reinstall it for tension.

[0026] The above embodiments of the present invention are merely examples to clearly illustrate the present invention, but are not intended 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 should be defined by the claims.

Claims

1. A finely adjustable floating wind power mooring tensioner, comprising a base (1) and a bracket (3), characterized in that: One end of the bracket (3) is connected to the base (1) via a rotating head (2), and the other end is connected to the chain stop module (6) via a connecting assembly (5). A chain guide block (7) is provided at the bottom of the chain stop module (6). The chain (11) passes through the chain guide block (7), the chain stop module (6), and the middle of the bracket (3) and is led out from the side of the guide sprocket (4). When the chain (11) moves from the chain guide block (7) to the guide sprocket (4), it can pass freely. When moving in the reverse direction, it is automatically locked under the action of the chain stop module (6), thereby realizing the coarse adjustment pre-tensioning of the chain (11). The connecting assembly (5) is connected to a tensioning cylinder (9) and a fixing nut (8), wherein the tensioning cylinder (9) comprises an upper tensioning cylinder and a lower tensioning cylinder, and the fixing nut (8) comprises an upper fixing nut and a lower fixing nut. The tensioning cylinder (9) drives the chain stop module (6) and the chain (11) to move and finely adjust the length of the chain (11), thereby achieving fine adjustment of the length and tension of the mooring anchor leg. A locking nut (10) is provided at the end of the tensioning cylinder (9), and the length of the mooring anchor leg is locked by adjusting the fixing nut (8) and the locking nut (10).

2. The finely adjustable floating wind power mooring tensioner according to claim 1, characterized in that: The connecting assembly (5) comprises a connecting rod A (51), a connecting rod B (52), a connecting rod C (53), and a connecting rod D (54); the connecting rod A (51) passes through the chain stop module (6) and the bracket (3) to be connected to the upper tensioning cylinder; the connecting rod B (52) passes through the chain stop module (6) and the bracket (3) to be provided with an upper fixing nut; the connecting rod C (53) passes through the chain stop module (6) and the bracket (3) to be connected to the lower tensioning cylinder; and the connecting rod D (54) passes through the chain stop module (6) and the bracket (3) to be provided with a lower fixing nut.

3. The finely adjustable floating wind power mooring tensioner according to claim 2 is characterized in that: The upper tensioning oil cylinder and the lower tensioning oil cylinder are respectively located on both sides of the center line of the bracket (3) and are arranged diagonally, and the upper fixing nut and the lower fixing nut are respectively located on both sides of the center line of the bracket (3) and are arranged diagonally.

4. The finely adjustable floating wind power mooring tensioner according to claim 1, characterized in that: The rotating head (2) is integrally cast or forged, and has connecting shafts at both ends. The connecting shafts are provided with self-lubricating bearings. The rotating head (2) is connected to the base (1) and the bracket (3) respectively via the self-lubricating bearings, so that the tensioner has the function of rotating and tightening the chain (11) in both horizontal and vertical directions.

5. The finely adjustable floating wind power mooring tensioner according to claim 1, characterized in that: One end of the rotating head (2) is a hollow dumbbell-shaped structure, and the other end is provided with an axial hole. The rotating head (2) is connected to the base (1) and the bracket (3) via a pin and a bearing, respectively, so that the tensioner has the function of rotating and tightening the chain (11) in both horizontal and vertical directions.

6. The finely adjustable floating wind power mooring tensioner according to claim 1, characterized in that: The chain stop module (6) comprises a support block (61), a cross-shaped chain guide hole is arranged at the center of the support block (61), and connecting rod mounting holes are arranged at four corners; a chain stop assembly is arranged on one side of the support block (61), and a trumpet-shaped chain guide block (7) is arranged on the other side; and the trumpet-shaped chain guide hole is arranged in the chain guide block (7).

7. The finely adjustable floating wind power mooring tensioner according to claim 6, characterized in that: The chain stopper assembly comprises a chain stopper block A (62), a chain stopper block B (63), a chain stopper block C (64), and a chain stopper block D (65) which are evenly arranged. The horizontal chain ring (111) is locked by the relative chain stopper block A (62) and the chain stopper block C (64), and the vertical chain ring (112) is locked by the relative chain stopper block B (63) and the chain stopper block D (65).

8. The finely adjustable floating wind power mooring tensioner according to claim 7, characterized in that: The chain stopper blocks A (62), B (63), C (64) and D (65) are respectively provided with arc grooves (651) corresponding to the outer circles of the chain rings at the middle of the sides close to the chain rings. During mooring adjustment, when the transverse chain ring (111) falls into the arc grooves (651), the chain stopper blocks A (62) and C (64) are automatically reset and locked under the action of their own weight, spring force or hydraulic drive; when the vertical chain ring (112) falls into the arc grooves (651), the chain stopper blocks B (62) and D (65) are automatically reset and locked under the action of their own weight, spring force or hydraulic drive.

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