High-precision floating mooring adjustment device based on on-line tension monitoring

Abstract

The present invention discloses a high-precision floating mooring adjustment device based on on-line tension monitoring, which relates to the technical field of mooring connection of floating wind power platforms. The upper suspension frame is connected to the welded back plate through the upper rotating shaft pin and is connected to the lower suspension frame through the lower rotating shaft pin. A locking mechanism is arranged inside the lower suspension frame. The tooth column passes through the lower suspension frame and the upper suspension frame and is locked through the locking mechanism. Oil cylinders are symmetrically arranged on both sides of the lower suspension frame, and the overall up and down movement of the locking mechanism is realized 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. The present invention has high adjustment precision and short operation cycle, and has functions of reliable connection, mooring cable length adjustment, self-locking and self-tightening, reverse loosening and load detection. It can adjust the mooring line length with high precision, simplifies the installation process of mooring line connection and tensioning of the tension leg wind power platform, and reduces the mooring and installation costs of the tension leg wind power platform.

Description

Technical Field

[0001] The present invention relates to the technical field of mooring connection of floating wind power platforms, and particularly to a high-precision floating mooring adjustment device for a tension leg floating wind power platform. Background Art

[0002] As the development of nearshore wind energy resources gradually reaches saturation, humans have gradually focused their attention on sea areas with a water depth exceeding 50m. Therefore, floating offshore wind power technology has become the main technical route for the development of deep-sea wind energy resources. A floating wind turbine generally consists of three main parts: 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 loads under typhoon conditions, the mooring system also needs to control the pitch angle of the wind turbine to ensure power generation efficiency. The mooring system usually consists of mooring cables, connectors, anchors, chain stoppers, and tensioning devices. Usually, a set of systems is composed of three mooring anchor legs, and each group includes one to three mooring cables. The tension leg wind power platform has become an important development direction because its mooring radius and motion response are more suitable for the large-scale construction of floating wind power. Traditional floating wind power platforms are generally connected to the platform through a chain stopper or a universal joint, and it is necessary to rely on a crane or a tensioner to adjust the length of the mooring chain to reach the set tension force. The adjustment accuracy is low and the operation cycle is long, which is not conducive to large-scale construction. Summary of the Invention

[0003] The purpose of the present invention is to solve the above technical problems and provide a high-precision floating mooring adjustment device for a tension leg floating wind power platform, which can reliably connect the mooring cable and has functions such as high tension, high-precision adjustment of the mooring cable length, locking, reverse loosening, and load detection.

[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 high-precision floating mooring adjustment device based on on-line tension monitoring, including an upper suspension frame, the upper suspension frame is connected to a welding back plate through an upper rotating shaft pin, the upper suspension frame is connected to a lower suspension frame through a lower rotating shaft pin, a locking mechanism is arranged inside the lower suspension frame, a tooth column passes through the lower suspension frame and the upper suspension frame and is locked through the locking mechanism, oil cylinders are symmetrically arranged on both sides of the lower suspension frame, and the overall up and down movement of the locking mechanism is realized through the oil cylinders, and 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 welding back plate includes symmetrically arranged welding plates, and at least two cross plates are arranged between the two welding plates to enhance the ability of the welding back plate to bear lateral loads.

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

[0007] Preferably, the lower suspension frame includes a lower suspension frame body. On both sides of the upper end of the lower suspension frame body, connecting ear plates are symmetrically arranged. In the middle of the lower suspension frame body, brackets are symmetrically arranged. The oil cylinder is arranged on the brackets. The piston rod of the oil cylinder is connected to the locking mechanism through a hinge or a slider to ensure that the up and down movement and the lateral displacement locking of the locking mechanism do not interfere with each other.

[0008] Preferably, the locking mechanism includes a locking block composed of several tooth segments. The inner ring of the locking block is provided with locking teeth. The upper ends of the tooth segments are provided with hydraulic quick connectors. A guide rod is arranged between two adjacent tooth segments. The tooth segments are integrated with a hydraulic cylinder and an oil circuit. Several tooth segments are synchronously opened by hydraulic drive. When the hydraulic system loses oil and pressure, the locking block meshes with the tooth column to complete the locking movement.

[0009] Preferably, an inner conical surface is arranged on the inner ring of the lower suspension frame, and an outer conical surface is arranged on the outer ring of the locking mechanism. Under the load condition, the inner conical surface and the outer conical surface cooperate to bear the force.

[0010] Preferably, the top end of the tooth column is an integrally forged eye plate, which is connected to the steel cable through an open thimble or connected to the chain through a shackle.

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

[0012] Preferably, several annular teeth are arranged in the middle of the tooth column, and the adjusting distance d between two adjacent teeth is set to 5 - 15 cm.

[0013] Preferably, the tension monitoring mechanism includes a main structure. Integrated blocks are symmetrically arranged on both sides of the main structure. A first sensor and an underwater quick cable connector are integrated in the integrated blocks to realize real-time monitoring of the tension during hoisting. A protective shell is arranged on the outside. A second sensor and a third sensor are also arranged on the main structure to realize non-stop detection.

[0014] Compared with the traditional structure, the beneficial effects of the present invention are as follows: The present invention has high adjustment accuracy and short operation cycle, and has functions of reliable connection, mooring cable length adjustment, self-locking and self-tightening, reverse loosening and load detection. It can accurately adjust the length of the mooring line, simplifies the installation process of mooring line connection and tensioning of the tension leg wind power platform. At most, only one ROV is needed to assist in the operation, reducing the mooring and installation costs of the tension leg wind power platform and being conducive to large-scale construction. Description of the Drawings

[0015] Figure 1 Schematic diagram of the structure of the present invention Figure 1 ;

[0016] Figure 2 Schematic diagram of the structure of the present invention Figure 2 ;

[0017] Figure 3 Schematic diagram of the structure of the lower suspension frame of the present invention;

[0018] Figure 4 Schematic diagram of the structure of the locking mechanism of the present invention;

[0019] Figure 5 Schematic diagram of the structure of the tooth column of the present invention;

[0020] Figure 6 Schematic diagram of the integrated structure of the tooth column and the tension detection mechanism of the present invention;

[0021] In the figure: 1. Welding back plate, 11. Welding plate, 12. Cross plate, 2. Upper rotating shaft pin, 3. Upper suspension frame, 4. Oil cylinder, 5. Lower suspension frame, 51. Connecting ear plate, 52. Bracket, 53. Lower suspension frame body, 531. Inner conical surface, 6. Locking mechanism, 61. Hydraulic quick connector, 62. Guide rod, 63. Tooth flap, 631. Outer conical 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. Teeth, 9. Lower rotating shaft pin. Detailed implementation mode

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

[0023] Refer to the attached Figure 1 , The high-precision floating mooring adjustment device based on online tension monitoring includes an upper suspension frame 3. The upper suspension frame 3 is connected to the welding back plate 1 through an upper rotating shaft pin 2. The upper suspension frame 3 is connected to the lower suspension frame 5 through a lower rotating shaft pin 9. A locking mechanism 6 is arranged inside the lower suspension frame 5. The tooth column 8 passes through the lower suspension frame 5 and the upper suspension frame 3 and is locked by the locking mechanism 6. Oil cylinders 4 are symmetrically arranged on both sides of the lower suspension frame 5, and the overall up and down movement of the locking mechanism 6 is realized through the oil cylinders 4. A tension monitoring mechanism 7 is arranged at the lower end of the tooth column 8, and the load is measured in real time through remote software monitoring.

[0024] As Figure 2 shown, 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 loads.

[0025] The upper suspension frame 3 is a hollow structure. The connecting ear plates of the lower suspension frame 5 are arranged in the front and rear hollow grooves of the upper suspension frame 3 and are respectively connected by the lower rotating shaft pins 9. The front end of the welding back plate 1 is arranged in the left and right ear plate hollow grooves of the upper suspension frame 3 and is respectively connected by the upper rotating shaft pins 2. With double pins on the left and right for load bearing, the load-bearing capacity is stronger than that of a single long pin.

[0026] As Figure 3 shown, the lower suspension frame 5 includes a lower suspension frame body 53. On both sides of the upper end of the lower suspension frame body 53, connecting ear plates 51 are symmetrically arranged. In the middle of the lower suspension frame body 53, brackets 52 are symmetrically arranged. The oil cylinder 4 is arranged on the brackets 52. The piston rod of the oil cylinder is connected to the locking mechanism 6 through a hinge or a slider, ensuring that the up and down movement and the lateral displacement locking of the locking mechanism 6 do not interfere with each other.

[0027] As Figure 4 shown, the locking mechanism 6 includes a locking block composed of a plurality of tooth segments 63. The inner circle of the locking block is provided with locking teeth. At the upper end of the tooth segment 63, a hydraulic quick connector 61 is provided. Between two adjacent tooth segments 63, a guide rod 62 is provided. The tooth segment 63 integrates a hydraulic cylinder and an oil circuit. Through hydraulic drive, a plurality of tooth segments 63 are synchronously opened. When the hydraulic system loses oil and pressure, the locking block meshes with the tooth column 8 to complete the locking movement.

[0028] As Figure 3-4 shown, the inner circle of the lower suspension 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. Under load conditions, the inner conical surface 531 and the outer conical surface 631 cooperate to bear the force.

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

[0030] A number of annular teeth 82 are arranged in the middle of the tooth column 8. The adjustment distance d between two adjacent teeth 82 is set to 5 - 15 cm, preferably 7.5 cm.

[0031] As Figure 6 shown, the tension monitoring mechanism 7 includes a main body structure 71. On both sides of the main body structure 71, integrated blocks 72 are symmetrically arranged. The integrated blocks 72 integrate a first sensor 73 and an underwater quick cable connector 74 to realize real-time monitoring of the tension during hoisting. A high-strength steel protective shell is arranged on the outside. A redundant second sensor and a third sensor are also arranged on the main body structure 71 to realize non-stop detection.

[0032] During specific implementation, the installation steps of the present invention are as follows:

[0033] 1) Connection of the top-welded backboard, testing:

[0034] First, align the welding backboard 1 with the floating body by scribing, then weld and fix it. Pre-install this device on the floating body and test whether the moving parts (upper suspension frame 3 and lower suspension frame 5) are normal and whether the rotation angle is normal. This device has the function of releasing two degrees of freedom, and the maximum allowable rotation angle is ±15°, without interference with the floating body structure.

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

[0036] After the pile driving is completed, install the bottom connector and the steel cable, wet store them on the seabed, and make good marks on the buoy. Install the joint and the steel cable at the bottom end of the tooth column 8. The top end of the tooth column 8 is in the form of an integral forged eye plate 81, and the steel cable can be connected through an open thimble or the chain can be connected through a shackle; it can also be made into a double-layer eye plate 81 to connect a closed thimble or a Y-shackle; connect a small buoy at the end of the top steel cable or chain.

[0037] 3) Reconnection, lifting:

[0038] Lower the lifting rope from the top of this cable stopper, find the position of the buoy and reconnect, then lift the steel cable.

[0039] 4) Sensor connection:

[0040] When lifting and the head of the tooth column 8 enters the locking mechanism 6, insert the sensor wire into the underwater quick cable connector 74 to read the real-time data of the tension at this time.

[0041] 5) Position adjustment of the locking mechanism:

[0042] According to the real-time load value, adjust the position of the locking mechanism 6. Specifically, pull the locking mechanism 6 upward by the piston rod 4 of the oil cylinder on the bracket 52, so that the inner conical surface 531 and the outer conical surface 631 of the bearing surface are separated, facilitating the opening of the four tooth flaps 63 to allow the tooth column 8 to pass through. The top of the locking mechanism 6 is equipped with a hydraulic quick connector 61, and the oil circuits of the four tooth flaps 63 are connected in parallel. When working underwater, the ROV robot quickly supplies oil to the hydraulic cylinders of the tooth flaps 63 through the hydraulic quick connector 61, and the four tooth flaps 63 open synchronously under hydraulic drive. The bottom diameter of the tooth column is 440 mm, and the middle gap after the locking block is opened is > 440 mm, and the steel cable joint with a maximum transverse dimension of 365 mm can pass through. The adjustment accuracy of the tooth column is 5 - 15 cm, preferably 7.5 cm, and the effective total adjustment range is 150 cm. At the same time, the length of the tooth column 8 can be set according to requirements to control the adjustment range.

[0043] 6) Locking and fixing:

[0044] When the steel cable is lifted in place, the hydraulic system loses oil and pressure and automatically shuts down. The four tooth segments 63 automatically reset by elasticity. The locking block engages with the tooth column 8 to ensure reliable locking. The locking mechanism 6 descends and returns to the initial state. The lower hanging frame 5 and the locking mechanism 6 bear the load through the cooperation of the inner conical surface 531 and the outer conical surface 631. The oil cylinder 4 and the locking block are connected by a hinge or a slider to ensure the lateral displacement when the tooth segment 63 resets. Sort out the sensor cables and fix them. The hydraulic drive is for temporary use during installation and does not participate in bearing the load.

[0045] This mechanism is a self-locking and self-tightening device, which ensures the safety of locking. If it is necessary to adjust the load or take it out, it is necessary to lift and unload through the top steel cable.

[0046] Measurement principle of the tension monitoring mechanism: The basic strain and temperature value are measured through a high-precision extensometer. The initial load is calibrated to 0. The strain when the load occurs is measured in real time and converted into a frequency signal to achieve anti-interference and lossless long-distance transmission. The real-time strain value is calculated according to the frequency signal to calculate the load value. On the remote software, the sensor is corrected according to the measured temperature value.

[0047] Function realization:

[0048] 1) Basic measurement function: The strain value is solved through the remote software monitoring system to measure the load in real time.

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

[0050] 3) Online sensor diagnosis function: It is equipped with a first sensor and 1-2 redundant second sensors and third sensors. When the first sensor is working, the other 1-2 redundant sensors are in sleep mode. If one of the sensors is damaged, its value will deviate significantly from the other two. At this time, the control center will automatically send an alarm. At this time, the other two normal sensors can be selected as the current value to realize non-stop detection.

[0051] 4) Quick replaceable function: Adopt a quick disassembly and assembly structure to ensure the quick online replacement of redundant sensors.

[0052] 5) Automatic calibration function: For the newly replaced and connected sensor, through the current values of 1-2 redundant sensors, the instant calibration of the new sensor is realized, and this work does not require unloading the tension load.

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

[0054] 7) Long-distance transmission function: By converting the strain value into a numerical frequency signal, long-distance transmission without attenuation is achieved.

[0055] The above embodiments of the present invention are merely examples clearly illustrating the present invention and do not 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. A high-precision floating mooring adjustment device based on online tension monitoring, comprising a lower hanging frame (5), wherein a locking mechanism (6) is arranged inside the lower hanging frame (5), wherein the locking mechanism (6) comprises a locking block composed of a plurality of tooth petals (63), wherein the inner ring of the locking block is provided with locking teeth, and wherein: It also includes an upper hanging frame (3), wherein the upper hanging frame (3) is connected to the welding back plate (1) via an upper rotating shaft pin (2), and the upper hanging frame (3) is connected to the lower hanging frame (5) via a lower rotating shaft pin (9). A tooth column (8) passes through the lower hanging frame (5) and the upper hanging frame (3) and is locked via a locking mechanism (6). Oil cylinders (4) are symmetrically arranged on both sides of the lower hanging frame (5), and the locking mechanism (6) is moved up and down as a whole via the oil cylinders (4). A tension monitoring mechanism (7) is arranged at the lower end of the tooth column (8), and real-time load measurement is monitored via remote software. The welding back plate (1) comprises symmetrically arranged welding plates (11), and at least two transverse plates (12) are arranged between two welding plates (11) to enhance the ability of the welding back plate (1) to bear lateral loads; The lower hanging frame (5) comprises a lower hanging frame body (53), connecting ear plates (51) are symmetrically arranged on both sides of the upper end of the lower hanging frame body (53), a bracket (52) is symmetrically arranged in the middle of the lower hanging frame body (53), the oil cylinder (4) is arranged on the bracket (52), and the oil cylinder piston rod is connected to the locking mechanism (6) through a hinge or a slider to ensure that the locking mechanism (6) does not interfere with the vertical movement and lateral displacement locking; A hydraulic quick connector (61) is provided at the upper end of the tooth petal (63), a guide rod (62) is provided between two adjacent tooth petals (63), a hydraulic cylinder and an oil circuit are integrated in the tooth petal (63), and a plurality of tooth petals (63) are hydraulically driven to open synchronously, and when the hydraulic system loses oil and pressure, the locking block meshes with the tooth column (8) to complete the locking movement; The tension monitoring mechanism (7) comprises a main structure (71), with integrated blocks (72) symmetrically arranged on both sides of the main structure (71), a first sensor (73) and an underwater quick cable connector (74) integrated in the integrated block (72) to achieve real-time monitoring of tension during lifting, and a protective shell arranged on the outside. The main structure (71) is also provided with a second sensor and a third sensor to achieve non-stop detection.

2. The high-precision floating mooring adjustment device based on online tension monitoring according to claim 1 is characterized in that: The upper hanging frame (3) is a hollow structure, 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 respectively connected through the lower rotating shaft pin (9), and 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 are respectively connected through the upper rotating shaft pin (2).

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

4. The high-precision floating mooring adjustment device based on online tension monitoring according to claim 1 is characterized in that: The top end of the tooth column (8) is an integrally forged eye plate (81) connected to a steel cable via an open cable knot, or connected to a chain via a shackle.

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

6. The high-precision floating mooring adjustment device based on online tension monitoring according to claim 1 is characterized in that: A plurality of ring-shaped teeth (82) are arranged in the middle of the tooth column (8), and the distance d between two adjacent teeth (82) is adjusted to be 5-15 cm.

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