High-precision floating body mooring adjustment device based on online tension monitoring

Abstract

The present invention relates to the technical field of the mooring connection of floating wind power platforms. Disclosed is a high-precision floating body mooring adjustment device based on online tension monitoring. An upper lifting frame is connected to a welding back plate by means of upper rotating shaft pins, and is connected to a lower lifting frame by means of lower rotating shaft pins; a locking mechanism is provided in the lower lifting frame; a toothed column runs through the lower lifting frame and the upper lifting frame, and is locked by means of the locking mechanism; hydraulic cylinders are symmetrically provided on two sides of the lower lifting frame, and by means of the hydraulic cylinders, the entire locking mechanism is moved vertically; and a tension monitoring mechanism is provided at the lower end of the toothed column, and monitors and measures, in real time, the load by means of remote software. The present invention features a high adjustment precision and a short operating cycle, has functions including reliable connection, length adjustment of mooring lines, self-locking and self-tightening, reverse release and load measurement, can adjust the length of mooring lines with high accuracy, simplifies the installation process of reconnection and tensioning of mooring lines of a tension-leg wind power platform, and reduces the mooring and installation costs of the tension-leg wind power platform.

Description

High-precision floating mooring adjusting device based on tension online monitoring TECHNICAL FIELD

[0001] The present application relates to the technical field of mooring connection of floating wind power platform, and particularly relates to a high-precision floating mooring adjusting device for a tension leg floating wind power platform. BACKGROUND

[0002] With the saturation of offshore wind energy resource development, human beings gradually focus on the sea area with a water depth of more than 50 m, and therefore, floating offshore wind power technology becomes the main technical route for deep sea wind energy resource development. A floating wind turbine is generally composed of a wind turbine, a floating foundation and a mooring system. The mooring system is mainly used for positioning the wind turbine and the floating foundation. In addition to considering the displacement allowed by the dynamic cable and the extreme load under typhoon conditions, the mooring system also needs to control the pitch angle of the wind turbine to ensure the power generation efficiency. The mooring system is generally composed of mooring cables, connecting pieces, anchors, chain stops and tensioning devices. A set of system is usually composed of three mooring legs, and each leg includes one to three mooring cables. The tension leg wind power platform becomes an important development direction because of its more suitable mooring radius and motion response for floating wind power large-scale construction. The traditional floating wind power platform is generally connected with the platform through a chain stopper or a universal joint, and the length of the mooring chain needs to be adjusted by a crane or a tensioner to reach a set tensioning force. The low adjustment precision and long operation cycle are not conducive to large-scale construction. SUMMARY

[0003] The present application aims to solve the above technical problems, and provides a high-precision floating mooring adjusting device for a tension leg floating wind power platform, which can reliably connect the mooring cable and has the functions of high tension, high-precision length adjustment of the mooring cable, locking, reverse release and load detection.

[0004] In order to achieve the above technical purposes and meet the above technical requirements, the technical solution adopted by the present application is: a high-precision floating mooring adjusting device based on tension online monitoring, which comprises an upper lifting frame, the upper lifting frame is connected with a welded back plate through an upper pivot pin, the upper lifting frame is connected with a lower lifting frame through a lower pivot pin, a locking mechanism is arranged in the lower lifting frame, a tooth column passes through the lower lifting frame and the upper lifting frame, and the tooth column is locked through the locking mechanism, oil cylinders are symmetrically arranged on both sides of the lower lifting frame, the whole locking mechanism is moved up and down through the oil cylinders, a tension monitoring mechanism is arranged at the lower end of the tooth column, and the load is measured in real time through remote software monitoring.

[0005] Preferably, the welded back plate comprises symmetrically arranged welded plates, and at least two cross plates are arranged between the two welded plates to enhance the ability of the welded back plate to bear lateral load.

[0006] Preferably, the upper hanging frame is a hollow structure, the connecting ear plates of the lower hanging frame are arranged in the front and rear hollow grooves of the upper hanging frame, and are connected by lower rotating shaft pins respectively, and the front end of the welded back plate is arranged in the left and right ear plate hollow grooves of the upper hanging frame and is connected by upper rotating shaft pins respectively.

[0007] Preferably, the lower hanging frame comprises a lower hanging frame body, the lower hanging frame body is symmetrically provided with connecting ear plates at both sides of the upper end, the lower hanging frame body is symmetrically provided with supports at the middle part, the oil cylinder is arranged on the support, and the oil cylinder piston rod is connected with the locking mechanism through a hinge or a sliding block, so that the up-down movement and the transverse displacement locking of the locking mechanism are ensured not to interfere.

[0008] Preferably, the locking mechanism comprises a locking block composed of a plurality of tooth petals, the locking block is provided with locking teeth at the inner circle, the upper end of the tooth petal is provided with a hydraulic quick connector, a guide rod is arranged between two adjacent tooth petals, and the tooth petal is integrated with a hydraulic cylinder and an oil way, so that the plurality of tooth petals are driven by hydraulic pressure to be opened synchronously, and the locking block is engaged with the tooth column to complete the locking movement when the hydraulic system loses oil and pressure.

[0009] Preferably, the inner circle of the lower hanging frame is provided with an inner taper surface, the outer circle of the locking mechanism is provided with an outer taper surface, and the inner taper surface and the outer taper surface are matched to bear the load under the load condition.

[0010] Preferably, the top end of the tooth column is an integral forged eye plate, the steel cable is connected through an open type cable joint, or the chain is connected through a shackle.

[0011] Preferably, the top end of the tooth column is a double-layer eye plate, the steel cable is connected through a closed type cable joint, or the chain is connected through a Y shackle.

[0012] Preferably, the middle part of the tooth column is provided with a plurality of annular teeth, and the distance d between two adjacent teeth is adjusted to 5-15 cm.

[0013] Preferably, the tension monitoring mechanism comprises a main body structure, the main body structure is symmetrically provided with integrated blocks at both sides, the integrated blocks are integrated with a first sensor and an underwater quick cable connector, so that the real-time monitoring of the tension during lifting is realized, a protective shell is arranged on the outside, and a second sensor and a third sensor are further arranged on the main body structure, so that the non-stop detection is realized.

[0014] Compared with the traditional structure, the application has the advantages of high adjustment accuracy, short operation cycle, reliable connection, mooring cable length adjustment, self-locking and self-tightening, reverse loosening and load detection function, can adjust the mooring line length with high precision, simplifies the installation process of the mooring line back connection and tension of the tension leg wind power platform, reduces the mooring and installation cost of the tension leg wind power platform, and is beneficial to large-scale construction. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is a schematic diagram of the structure of the present application;

[0016] Fig. 2 is a schematic diagram of the structure of the present application;

[0017] Fig. 3 is a schematic diagram of the structure of the lower hanging frame of the present application;

[0018] Fig. 4 is a schematic diagram of the structure of the locking mechanism of the present application;

[0019] Fig. 5 is a schematic diagram of the structure of the tooth column of the present application;

[0020] Fig. 6 is a schematic diagram of the integrated structure of the tooth column and tension detection mechanism of the present application;

[0021] In the figure: 1. Welding back plate, 11. Welding plate, 12. Cross plate, 2. Upper shaft pin, 3. Upper hanging frame, 4. Oil cylinder, 5. Lower hanging frame, 51. Connecting ear plate, 52. Bracket, 53. Lower hanging frame body, 531. Inner taper surface, 6. Locking mechanism, 61. Hydraulic quick connector, 62. Guide rod, 63. Tooth lobe, 631. Outer taper surface, 7. Tension monitoring mechanism, 71. Main body structure, 72. Integrated block, 73. First sensor, 74. Underwater quick cable connector, 8. Tooth column, 81. Eye plate, 82. Tooth, 9. Lower shaft pin. DETAILED DESCRIPTION

[0022] The present application will be further described below.

[0023] Referring to Fig. 1, the high-precision floating system mooring adjusting device based on online tension monitoring includes an upper hanging frame 3, which is connected with a welding back plate 1 through an upper shaft pin 2, and is connected with a lower hanging frame 5 through a lower shaft pin 9. The lower hanging frame 5 is provided with a locking mechanism 6. A tooth column 8 passes through the lower hanging frame 5 and the upper hanging frame 3, and is locked through the locking mechanism 6. The lower hanging frame 5 is symmetrically provided with oil cylinders 4 on both sides, which realize the up-down movement of the whole locking mechanism 6. The lower end of the tooth column 8 is provided with a tension monitoring mechanism 7, which measures the load in real time through remote software monitoring.

[0024] As shown in Fig. 2, the welding back plate 1 includes symmetrically arranged welding plates 11, and at least two cross plates 12 are arranged between the two welding plates 11 to enhance the ability of the welding back plate 1 to bear lateral load.

[0025] The upper hanging frame 3 is a hollow structure, and the connecting ear plates of the lower hanging frame 5 are arranged in the front and rear hollow grooves of the upper hanging frame 3 and are connected through the lower shaft pins 9 respectively. The front end of the welding back plate 1 is arranged in the left and right ear plate hollow grooves of the upper hanging frame 3 and is connected through the upper shaft pins 2 respectively. The left and right double pins are adopted to bear, and the bearing capacity is stronger than that of a single long pin.

[0026] As shown in Figure 3, the lower hanging frame 5 comprises a lower hanging frame body 53, the upper end of the lower hanging frame body 53 is symmetrically provided with a connecting lug plate 51, the middle of the lower hanging frame body 53 is symmetrically provided with a support 52, the oil cylinder 4 is arranged on the support 52, and the oil cylinder piston rod is connected with the locking mechanism 6 through a hinge or a sliding block, so as to ensure that the up-down movement and the transverse displacement locking of the locking mechanism 6 do not interfere with each other.

[0027] As shown in Figure 4, the locking mechanism 6 comprises a locking block composed of a plurality of tooth petals 63, the inner circle of the locking block is provided with locking teeth, the upper end of the tooth petal 63 is provided with a hydraulic quick connector 61, a guide rod 62 is arranged between two adjacent tooth petals 63, and the tooth petal 63 is integrated with a hydraulic cylinder and an oil way, so as to drive a plurality of tooth petals 63 to be synchronously opened through hydraulic drive, and the locking block is engaged with the tooth column 8 to complete the locking movement when the hydraulic system loses oil and pressure.

[0028] As shown in Figures 3-4, the inner circle of the lower hanging frame 5 is provided with an inner conical surface 531, and the outer circle of the locking mechanism 6 is provided with an outer conical surface 631, so as to bear the force through the cooperation of the inner conical surface 531 and the outer conical surface 631 under the load condition.

[0029] As shown in Figure 5, the top end of the tooth column 8 is an integral forged eye plate 81, which is connected with a steel cable through an open type cable joint or is connected with a chain through a shackle. It can also be designed as a double-layer eye plate 81, which is connected with a steel cable through a closed type cable joint or is connected with a chain through a Y shackle.

[0030] The middle part of the tooth column 8 is provided with a plurality of annular teeth 82, and the distance d between two adjacent teeth 82 is adjusted to 5-15 cm, preferably 7.5 cm.

[0031] As shown in Figure 6, the tension monitoring mechanism 7 comprises a main body structure 71, the two sides of the main body structure 71 are symmetrically provided with integrated blocks 72, the integrated blocks 72 are integrated with a first sensor 73 and an underwater quick cable connector 74, so as to realize real-time monitoring of the tension during hoisting, the outer side is provided with a high-strength steel protective shell, and the main body structure 71 is further provided with redundant second and third sensors, so as to realize non-stop detection.

[0032] In specific implementation, the installation steps of the present application are as follows:

[0033] 1) Connection of the top welded back plate, test:

[0034] Firstly, the welded back plate 1 is aligned with the floating body and is welded and fixed, the device is pre-installed on the floating body, and whether the movable parts (the upper hanging frame 3 and the lower hanging frame 5) are normal and whether the rotation angle is normal is tested. The device has the function of releasing two degrees of freedom, and the maximum allowable rotation angle is ±15°, which does not interfere with the structure of the floating body.

[0035] 2) Installation of lower connector, wet storage:

[0036] After the pile is completed, the bottom connector and the steel cable are installed, wet stored on the seabed, and the buoy marker is completed. The bottom end of the tooth column 8 is installed with a joint and a steel cable, and the top end of the tooth column 8 is in the form of an integral forged eye plate 81, which can be connected to the steel cable through an open type cable joint, or connected to the chain through a shackle; It can also be made into a double-layer eye plate 81 to connect a closed cable joint or a Y shackle; The end of the steel cable or chain at the top end is connected to a small buoy.

[0037] 3) Back connection, lifting:

[0038] The lifting rope is lowered from the top of the stopper, the buoy position is found, and the steel cable is lifted.

[0039] 4) Sensor connection:

[0040] When the tooth column 8 head is lifted into the locking mechanism 6, the sensor line is inserted into the underwater quick cable joint 74 to read the real-time data of the tension at this time.

[0041] 5) Adjustment of locking mechanism position:

[0042] According to the real-time load value, the position of the locking mechanism 6 is adjusted, specifically by pulling the locking mechanism 6 upward through the piston rod of the oil cylinder 4 on the support 52 to move upward, so that the inner and outer tapered surfaces 531, 631 are separated, and the four tooth petals 63 are opened to pass through the tooth column 8. The top of the locking mechanism 6 is provided with a hydraulic quick connector 61, which connects the oil lines of the four tooth petals 63 in parallel. When working underwater, the ROV robot quickly supplies oil to the hydraulic cylinder of the tooth petals 63 through the hydraulic quick connector 61, and the four tooth petals 63 are synchronously opened under hydraulic drive. The diameter of the tooth column at the bottom is 440mm, and the gap between the locking blocks after opening is >440mm, which can pass through the steel cable joint with a maximum transverse size of 365mm. The adjustment accuracy of the tooth column is 5-15cm, preferably 7.5cm, and the effective adjustment range is 150cm. At the same time, the length of the tooth column 8 can be set according to the demand, and the adjustment range is controlled.

[0043] 6) Locking and fixing:

[0044] When the steel cable is lifted into position, the hydraulic system is automatically closed by losing oil and pressure, and the four tooth petals 63 are automatically reset by relying on elasticity, the locking blocks are engaged with the tooth column 8, and the reliable locking is ensured. The locking mechanism 6 is lowered to restore to the initial state, and the lower lifting frame 5 and the locking mechanism 6 are matched by the inner and outer tapered surfaces 531, 631 to bear the force. The oil cylinder 4 and the locking block are connected by a hinge or a sliding block to ensure the transverse displacement of the tooth petals 63 when they are reset. The sensor cable is arranged and fixed. The hydraulic drive is temporarily used during installation and does not participate in bearing.

[0045] The self-locking and self-tightening device of the mechanism ensures the safety of the locking. If the load needs to be adjusted or taken out, the top steel cable needs to be lifted to unload.

[0046] The tension monitoring mechanism measurement principle: through the high-precision extension device, the basic strain and temperature value are measured, the initial load is calibrated to 0, the strain when the load occurs is measured in real time, the frequency signal is converted, the anti-interference and lossless long-distance transmission are realized, the real-time strain value is calculated according to the frequency signal conversion, and the load value is calculated. According to the measured temperature value, the sensor is corrected on the remote software.

[0047] Function realization:

[0048] 1) Basic measurement function: the strain value is calculated by the remote software monitoring system, and the load is measured in real time.

[0049] 2) Measurement function during installation (hoisting): during hoisting, the sensor is integrated into the tooth column 8, the sensor is provided with a underwater quick cable joint 74, and the real-time detection of the tension during hoisting can be realized.

[0050] 3) Online sensor diagnosis function: with the first sensor and 1-2 redundant second sensors and third sensors, the first sensor works, and the other 1-2 redundant sensors are dormant. If one of the sensors is broken, the value will deviate significantly from the other two, at which time the control center will automatically issue an alarm, at which time the other two normal sensors can be selected as the current value, and the non-stop detection is realized.

[0051] 4) Quick replaceable function: a quick detachable structure is adopted, so that the redundant sensor can be quickly replaced online.

[0052] 5) Automatic calibration function: for the newly replaced sensor, the current value of the 1-2 redundant sensors is used to realize the instantaneous calibration of the new sensor, and the tension load does not need to be unloaded.

[0053] 6) Permanent waterproof and anti-collision: the sensor is protected from collision damage by a hard shell, and the permanent waterproof seal design can meet the requirements of underwater wet storage pressure resistance for months and long-term underwater use.

[0054] 7) Long-distance transmission function: the strain value is converted into a numerical frequency signal to realize long-distance non-decay transmission.

[0055] The above embodiments of the present application are only examples for clearly illustrating the present application, but not to limit the protection scope of the present application, all equivalent technical solutions also belong to the scope of the present application, and the patent protection scope of the present application should be defined by the claims.

Claims

1. A high-precision floating system mooring adjusting device based on tension online monitoring, comprising a lower hanging frame (5), a locking mechanism (6) is arranged in the lower hanging frame (5), the locking mechanism (6) comprises a locking block composed of a plurality of tooth petals (63), and a locking tooth is arranged in an inner circle of the locking block, characterized in that: Also include the upper hanging frame (3), the upper hanging frame (3) is connected with the welding back plate (1) through the upper pivot pin (2), the upper hanging frame (3) is connected with the lower hanging frame (5) through the lower pivot pin (9), the tooth column (8) passes through the lower hanging frame (5), the upper hanging frame (3), is locked through the locking mechanism (6), the lower hanging frame (5) is provided with the oil cylinder (4) on both sides, the locking mechanism (6) is realized through the oil cylinder (4) the whole up and down movement, the lower end of the tooth column (8) is provided with tension monitoring mechanism (7), through the remote software monitoring real-time measurement load; The welding back plate (1) comprises symmetrically arranged welding plates (11), and at least two transverse plates (12) are arranged between the two welding plates (11) to enhance the ability of the welding back plate (1) to bear lateral load. The lower hanging frame (5) comprises a lower hanging frame body (53), the lower hanging frame body (53) is provided with a connecting lug plate (51) on both sides of the upper end, the lower hanging frame body (53) is provided with a support (52) symmetrically in the middle, the oil cylinder (4) is arranged on the support (52), the oil cylinder piston rod is connected with the locking mechanism (6) through a hinge or a sliding block, and the up and down movement and the transverse displacement locking of the locking mechanism (6) are ensured not to interfere with each other. The upper end of the tooth lobe (63) is provided with a hydraulic quick connector (61), and a guide rod (62) is arranged between two adjacent tooth lobes (63). The tooth lobe (63) is integrated with a hydraulic cylinder and an oil circuit. A plurality of tooth lobes (63) are driven by hydraulic pressure to open synchronously. When the hydraulic system loses oil and pressure, the locking block is engaged with the tooth column (8) to complete the locking movement. The tension monitoring mechanism (7) comprises a main body structure (71), the main body structure (71) is provided with integrated blocks (72) on both sides, the integrated blocks (72) are integrally provided with first sensors (73) and underwater quick cable connectors (74), the real-time monitoring of tension during lifting is realized, and a protective shell is arranged on the outside. The main body structure (71) is also provided with a second sensor and a third sensor to realize non-stop detection.

2. The high-precision floating system mooring adjusting device based on tension online monitoring according to claim 1, characterized in that: The upper hanging frame (3) is a hollow structure, the connecting lug plate of the lower hanging frame (5) is arranged in the front and rear hollow grooves of the upper hanging frame (3), and is connected through the lower pivot pin (9), respectively. The front end of the welding back plate (1) is arranged in the left and right lug plate hollow grooves of the upper hanging frame (3), and is connected through the upper pivot pin (2), respectively.

3. The high-precision floating system mooring adjusting device based on tension online monitoring according to claim 1, characterized in that: The inner ring of the lower hanging frame (5) is provided with an inner taper surface (531), and the outer ring of the locking mechanism (6) is provided with an outer taper surface (631). Under the load condition, the inner taper surface (531) and the outer taper surface (631) cooperate to bear the stress.

4. The high-precision floating system mooring adjusting device based on tension online monitoring according to claim 1, characterized in that: The top end of the tooth column (8) is an integral forged eye plate (81), which is connected with a steel cable through an open type cable joint, or is connected with a chain through a shackle.

5. The high-precision floating system mooring adjustment device based on tension online monitoring according to claim 1, characterized in that: The top end of the tooth column (8) is a double-layer eye plate (81), which is connected with a steel cable through a closed type cable joint, or is connected with a chain through a Y shackle.

6. The high-precision floating system mooring adjustment device based on tension online monitoring according to claim 1, characterized in that: The middle part of the tooth column (8) is provided with a plurality of annular teeth (82), and the distance d between two adjacent teeth (82) is adjusted to 5-15 cm.

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