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

Abstract

The invention discloses a high-precision floating system mooring adjusting device based on tension online monitoring, and relates to the technical field of floating type wind power platform mooring connection. An upper hanging frame is connected with a welding back plate through an upper rotating shaft pin and connected with a lower hanging frame through a lower rotating shaft pin, and a locking mechanism is arranged in the lower hanging frame; the tooth column penetrates through the lower lifting frame and the upper lifting frame and is locked through a locking mechanism, oil cylinders are symmetrically arranged on the two sides of the lower lifting frame, the locking mechanism integrally moves up and down through the oil cylinders, a tension monitoring mechanism is arranged at the lower end of the tooth column, and loads are monitored and measured in real time through far-end software. The tension leg wind power platform mooring line tie-back and tensioning device is high in adjustment precision and short in operation period, has the functions of reliable connection, mooring line length adjustment, self-locking and self-tightening, reverse loosening and load detection, can adjust the length of the mooring line at high precision, simplifies the tie-back and tensioning installation process of the tension leg wind power platform mooring line, and reduces the mooring and installation cost of the tension leg wind power platform.

Description

Technical Field

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

[0002] As offshore wind energy resources are gradually saturated, humans are gradually focusing on sea areas with a water depth of more than 50m. Therefore, floating offshore wind power technology has become the main technical route for the development of deep-sea wind energy resources. Floating wind turbines are usually composed of three major parts: wind turbines, floating foundations and mooring systems. The mooring system is mainly used for the positioning of wind turbines and floating foundations. In addition to considering the allowable displacement of dynamic cables and 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 is usually composed of mooring cables, connectors, anchors, stoppers and tensioning devices. It is usually composed of three sets of mooring anchor legs to form a system, each of which includes one to three mooring cables. Tension leg wind power platforms have become an important development direction because their mooring radius and motion response are more suitable for 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. It is necessary to rely on a crane or tensioner to adjust the length of the mooring chain to achieve the set tension. 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 objectives and meet the above technical requirements, the technical solution adopted by the present invention is: a high-precision floating mooring adjustment device based on online tension monitoring, including an upper hanging frame, the upper hanging frame is connected to the welding backplate through an upper rotating shaft pin, the upper hanging frame is connected to the lower hanging frame through a lower rotating shaft pin, a locking mechanism is arranged in the lower hanging frame, the gear column passes through the lower hanging frame and the upper hanging frame, and is locked by the locking mechanism, oil cylinders are symmetrically arranged on both sides of the lower hanging frame, and the locking mechanism is moved up and down as a whole by the oil cylinders, and a tension monitoring mechanism is arranged at the lower end of the gear column, and the load is measured in real time through remote software monitoring.

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

[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 respectively connected by the lower rotating shaft pin, and the front end of the welding back plate is arranged in the left and right ear plate hollow grooves of the upper hanging frame, and are respectively connected by the upper rotating shaft pin.

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

[0008] Preferably: the locking mechanism comprises a locking block composed of a plurality of tooth petals, the inner ring of the locking block is provided with locking teeth, the upper end of the tooth petals is provided with a hydraulic quick connector, a guide rod is provided between two adjacent tooth petals, a hydraulic cylinder and an oil circuit are integrated in the tooth petals, and a plurality of tooth petals are hydraulically driven to open synchronously, and when the hydraulic system loses oil and pressure, the locking block engages with the tooth column to complete the locking movement.

[0009] Preferably, the inner ring of the lower hanging frame is provided with an inner conical surface, and the outer ring of the locking mechanism is provided with an outer conical surface, and the force is borne by the cooperation of the inner conical surface and the outer conical surface under load conditions.

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

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

[0012] Preferably, a plurality of ring-shaped teeth are arranged in the middle of the tooth column, and the adjustment distance d between two adjacent teeth is set to 5-15 cm.

[0013] Preferably: the tension monitoring mechanism comprises 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 block to realize real-time monitoring of tension during lifting, a protective shell is arranged on the outside, and 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 present invention has the following beneficial effects: the present invention has high adjustment accuracy, short operation cycle, reliable connection, mooring cable length adjustment, self-locking and self-tightening, reverse loosening and load detection functions, and can adjust the mooring line length with high accuracy, simplifying the installation process of the mooring line reconnection and tensioning of the tension leg wind power platform. The installation only requires one ROV to assist the operation, which reduces the mooring and installation costs of the tension leg wind power platform and is conducive to large-scale construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The structure of the present invention is shown in FIG. Figure 1 ; Figure 2 The structure of the present invention is shown in FIG. Figure 2 ; Figure 3 It is a schematic diagram of the lower hanging frame structure of the present invention; Figure 4 It is a schematic diagram of the locking mechanism structure of the present invention; Figure 5 It is a schematic diagram of the gear column structure of the present invention; Figure 6 It is a schematic diagram of the integrated structure of the gear column and the tension detection mechanism of the present invention; In the figure: 1. welding back plate, 11. welding plate, 12. cross plate, 2. upper pivot 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 cone, 6. locking mechanism, 61. hydraulic quick connector, 62. guide rod, 63. tooth flap, 631. outer cone, 7. tension monitoring mechanism, 71. main structure, 72. integrated block, 73. first sensor, 74. underwater quick cable connector, 8. tooth column, 81. eye plate, 82. tooth, 9. lower pivot pin. DETAILED DESCRIPTION

[0016] The present invention will be further described below.

[0017] See attached Figure 1 A high-precision floating mooring adjustment device based on online tension monitoring includes an upper hanging frame 3, which is connected to a welding back plate 1 through an upper rotating shaft pin 2, and is connected to a lower hanging frame 5 through a lower rotating shaft pin 9. A locking mechanism 6 is arranged in the lower hanging frame 5, and a tooth column 8 passes through the lower hanging frame 5 and the upper hanging frame 3 and is locked by the 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 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.

[0018] like Figure 2 As shown, the welding back plate 1 includes 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.

[0019] 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 respectively connected by the lower rotating shaft pin 9. 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 by the upper rotating shaft pin 2. The left and right double pins are used for bearing, and the bearing capacity is stronger than that of a single long pin.

[0020] like Figure 3 As shown, the lower hanging frame 5 includes 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, and 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 cylinder piston rod is connected to the locking mechanism 6 through a hinge or a slider to ensure that the up and down movement and lateral displacement locking of the locking mechanism 6 do not interfere.

[0021] like Figure 4 As shown, the locking mechanism 6 includes a locking block composed of a plurality of tooth petals 63, the inner ring 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 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 opened synchronously by hydraulic drive, and when the hydraulic system loses oil and pressure, the locking block engages with the tooth column 8 to complete the locking movement.

[0022] like Figure 3-4 As shown, 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. Under load conditions, the inner conical surface 531 and the outer conical surface 631 cooperate to bear the force.

[0023] like Figure 5 As shown, the top of the tooth column 8 is an integrally forged eye plate 81, which is connected to the steel cable through an open cable knot, or connected to the chain through a shackle. It can also be designed as a double-layer eye plate 81, connected to the steel cable through a closed cable knot, or connected to the chain through a Y shackle.

[0024] 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, preferably 7.5 cm.

[0025] like Figure 6 As shown, the tension monitoring mechanism 7 includes a main structure 71, and integrated blocks 72 are symmetrically arranged on both sides of the main structure 71. The integrated block 72 is integrated with a first sensor 73 and an underwater quick cable connector 74 to realize real-time monitoring of the tension during lifting. A high-strength steel protective shell is arranged on the outside, and redundant second and third sensors are also arranged on the main structure 71 to realize non-stop detection.

[0026] During specific implementation, the installation steps of the present invention are as follows: 1) Top welding backplane connection, test: First, align the welding back plate 1 with the floating body line, weld and fix it, pre-install the device on the floating body, and test whether each active part (upper hanging frame 3, lower hanging frame 5) is normal and whether the rotation angle is normal. The 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.

[0027] 2) Installation of lower connector, wet storage: After the pile driving is completed, the bottom connector and steel cable are installed, stored wet on the seabed, and the buoy is marked. The joint and steel cable are installed at the bottom of the tooth column 8, and the top of the tooth column 8 is in the form of an integrally forged eye plate 81, which can be connected to the steel cable through an open cable segment, or connected to the chain through a shackle; it can also be made into a double-layer eye plate 81, connected to a closed cable segment or a Y shackle; a small buoy is connected to the end of the top steel cable or chain.

[0028] 3) Tie-back and lifting: Lower the lifting rope from the top of the cable stop, find the position of the buoy and tie it back, and then lift the steel cable.

[0029] 4) Sensor connection: When the gear column 8 is hoisted and the head thereof enters the locking mechanism 6, the sensor line is inserted into the underwater quick cable connector 74 to read the real-time data of the tension at this time.

[0030] 5) Locking mechanism position adjustment: According to the real-time load value, the position of the locking mechanism 6 is adjusted, specifically, the locking mechanism 6 is pulled upward by the piston rod of the oil cylinder 4 on the bracket 52, so that the inner cone 531 and the outer cone 631 of the bearing surface are disengaged, so that the four tooth petals 63 are opened to allow the tooth column 8 to pass. The top of the locking mechanism 6 is provided with a hydraulic quick connector 61, and the oil circuits of the four tooth petals 63 are connected in parallel. When working underwater, the ROV robot quickly transports oil to the hydraulic cylinder of the tooth petal 63 through the hydraulic quick connector 61, and the four tooth petals 63 are opened synchronously under hydraulic drive. The bottom diameter of the tooth column is 440mm, and the middle gap is greater than 440mm after the locking block is opened, and a steel cable connector with a maximum lateral dimension of 365mm can be passed. The adjustment accuracy of the tooth column is 5-15cm, preferably 7.5cm, and the total effective adjustment range is 150cm. At the same time, the length of the tooth column 8 can be set according to demand to control the adjustment range.

[0031] 6) Locking and fixing: When the steel cable is hoisted into place, the hydraulic system automatically closes due to oil and pressure loss, and the four tooth petals 63 automatically reset themselves due to elasticity, and the locking block engages with the tooth column 8 to ensure reliable locking. The locking mechanism 6 descends and returns to its initial state, and the lower hanging frame 5 and the locking mechanism 6 cooperate with the inner conical surface 531 and the outer conical surface 631 to bear the force. The oil cylinder 4 is connected to the locking block by a hinge or a slider to ensure the lateral displacement of the tooth petal 63 when it is reset. Arrange the sensor cables and fix them. The hydraulic drive is used temporarily during installation and does not participate in load bearing.

[0032] This mechanism is a self-locking and self-tightening device, which ensures the safety of locking. If the load needs to be adjusted or removed, it needs to be lifted and unloaded by the top steel cable.

[0033] Measurement principle of the tension monitoring mechanism: The basic strain and temperature values ​​are measured by a high-precision extension device. 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 load value is calculated based on the real-time strain value converted from the frequency signal. On the remote software, the sensor is corrected based on the measured temperature value.

[0034] Functionality: 1) Basic measurement function: Calculate strain value through remote software monitoring system and measure load in real time.

[0035] 2) Measurement function during installation (hoisting): During hoisting, since the sensor is integrated into the tooth column 8 and the sensor is provided with an underwater quick cable connector 74, real-time detection of tension during hoisting can be achieved.

[0036] 3) Online sensor diagnosis function: With the first sensor and 1-2 redundant second and third sensors, when the first sensor is working, the other 1-2 redundant sensors are dormant. If one of the sensors is broken, its value will deviate significantly from the other two. At this time, the control center will automatically issue an alarm. At this time, the other two normal sensors can be selected as the current value to achieve non-stop detection.

[0037] 4) Quick replaceable function: The quick detachable structure ensures quick online replacement of redundant sensors.

[0038] 5) Automatic calibration function: For newly replaced sensors, the current values ​​of 1-2 redundant sensors are used to instantly calibrate the new sensor. This work does not require unloading the tension load.

[0039] 6) Permanent waterproof and anti-collision: The hard shell protects the sensor from collision damage, and the permanent waterproof sealing design can meet the requirements of wet storage and pressure resistance for several months underwater and long-term underwater use.

[0040] 7) Long-distance transmission function: By converting the strain value into a numerical frequency signal, long-distance attenuation-free transmission is achieved.

[0041] 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 high-precision floating mooring adjustment device based on online tension monitoring, characterized in that: The invention comprises an upper hanging frame (3), wherein the upper hanging frame (3) is connected to a welding back plate (1) via an upper rotating shaft pin (2), and the upper hanging frame (3) is connected to a lower hanging frame (5) via a lower rotating shaft pin (9). A locking mechanism (6) is arranged in the lower hanging frame (5), and a tooth column (8) passes through the lower hanging frame (5) and the upper hanging frame (3) and is locked by the 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 by 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 by remote software monitoring.

2. The high-precision floating mooring adjustment device based on online tension monitoring according to claim 1 is characterized in that: 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.

3. 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).

4. The high-precision floating mooring adjustment device based on online tension monitoring according to claim 1 is characterized in that: 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), and 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.

5. The high-precision floating mooring adjustment device based on online tension monitoring according to claim 1 is characterized in that: The locking mechanism (6) comprises a locking block composed of a plurality of tooth petals (63), the inner ring of the locking block being provided with locking teeth, the upper end of the tooth petals (63) being provided with a hydraulic quick connector (61), a guide rod (62) being provided between two adjacent tooth petals (63), a hydraulic cylinder and an oil circuit being integrated in the tooth petals (63), the plurality of tooth petals (63) being synchronously opened by hydraulic drive, and when the hydraulic system loses oil and pressure, the locking block meshes with the tooth column (8) to complete the locking movement.

6. 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.

7. 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.

8. 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.

9. 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.

10. The high-precision floating mooring adjustment device based on online tension monitoring according to claim 1 is characterized in that: 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.

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