A floating lifting safety device and safety method for a wave energy power generation system

Abstract

The present application belongs to the field of wave energy power generation device, and particularly relates to a float lifting and danger avoiding device and a danger avoiding method for a wave energy power generation system. The float lifting and danger avoiding device comprises a float device and a lifting and danger avoiding device. The float device comprises a mounting platform, a rocker, a sliding block, a vertical rod and a float. One end of the rocker is hingedly mounted on the mounting platform, and the sliding block is slidably mounted on the rocker. One end of the vertical rod is hingedly connected with the sliding block, and the other end is fixedly connected with the float. A pull ring is mounted on the rocker. The lifting and danger avoiding device comprises a lifting mechanism, a lifting hydraulic cylinder and a self-locking mechanism. One end of the lifting mechanism is hingedly connected with the mounting platform, and the other end is fixedly connected with the self-locking mechanism. The self-locking mechanism is detachably connected with the pull ring mounted on the rocker. The float lifting and danger avoiding device can lift the float in extreme weather, thereby ensuring the safety of the wave energy power generation system.

Description

Technical Field

[0001] This invention belongs to the technical field of wave energy power generation devices, specifically relating to a float lifting and safety device and safety method for wave energy power generation systems. Background Technology

[0002] With increasingly severe energy and environmental problems, the search for new and renewable energy sources is a future development trend. Ocean resources are widely distributed, and wave energy, as a new energy source, plays a crucial role in the global energy landscape. If developed properly, wave energy can not only alleviate the current predicament of dwindling fossil fuel resources but also possess significant strategic importance and economic benefits.

[0003] In recent years, wave energy power generation devices have developed rapidly. Wave energy power generation devices are mainly of the oscillating float type. They are flexible in structure, small in size, can work in different water depth environments, and are easy to combine with various platforms and be promoted in arrays.

[0004] However, the marine environment is complex and changeable. Extreme weather conditions such as typhoons can easily generate strong winds and huge waves at sea, causing damage to marine structures. Compared with land-based structures, the design and operation of structures in the marine environment face greater challenges. This is especially true for oscillating float-type wave energy power generation devices, because in the process of interacting with ocean waves, in addition to being able to withstand operational loads, the float structure's tolerance to extremely large waves and its ability to survive under extreme load conditions are also crucial.

[0005] With the further development of the marine economy, the development of marine new energy sources such as wave energy will inevitably reach a climax. It is crucial to ensure that power generation devices can withstand severe sea conditions such as typhoons and to increase the survivability of wave energy power generation devices at sea.

[0006] A relatively simple safety measure is to use a telescopic mechanism such as a hydraulic cylinder (either a hydraulic cylinder or a rope, with one end attached to the platform and the other end directly connected to the float mechanism in the wave energy device, and always connected) to directly lift the wave energy device during extreme weather, thus protecting the float from the impact of waves. However, this method has the following technical problems:

[0007] When a hydraulic cylinder is used as the telescopic mechanism, the large stroke of the hydraulic cylinder increases the difficulty of processing and construction. Furthermore, since the telescopic mechanism and the float mechanism are always connected, the float mechanism must overcome not only its own resistance but also the resistance of the telescopic mechanism when moving under normal sea conditions. This reduces the working efficiency of the wave energy device to some extent.

[0008] When the rope is directly connected to the float, because the rope is flexible, in actual use, in order to ensure that the float can move normally under normal sea conditions, the rope is not strained and has slack. Moreover, the rope moves with the float continuously. In this way, the state of the flexible rope is uncontrollable. Under the action of sea wind or mechanism, it may become entangled or hooked somewhere, thus affecting the operation of the mechanism. The safety of the mechanism cannot be guaranteed, and damage to the wave energy device is inevitable.

[0009] Therefore, if the above-mentioned risk avoidance method is adopted, the float will always be affected by the telescopic mechanism when working under normal sea conditions, and the working efficiency and safety of the device cannot be guaranteed. Summary of the Invention

[0010] To ensure that wave energy power generation systems are not damaged under extreme weather conditions such as strong winds and high waves, this invention provides a float lifting and safety protection device and method for wave energy power generation systems. It can lift the float under extreme weather conditions to ensure the safety of the wave energy power generation system, while enabling the wave energy power generation system to work independently under normal operating conditions without being restricted by the safety protection device.

[0011] This invention is achieved through the following technical solution:

[0012] A float lifting and safety device for a wave energy power generation system, the float lifting and safety device comprising: a float device and a lifting and safety device;

[0013] The float device includes: a mounting platform, a rocker arm, a slider, a vertical rod, and a float;

[0014] One end of the rocker arm is hinged to the mounting platform, and the slider is slidably mounted on the rocker arm, allowing the slider to slide along the rocker arm; one end of the vertical rod is hinged to the slider, and the other end is fixedly connected to the float; a pull ring is installed on the rocker arm;

[0015] The lifting and safety device includes: a lifting mechanism, a lifting hydraulic cylinder, and a self-locking mechanism;

[0016] One end of the lifting mechanism is hinged to the mounting platform, and the other end is fixedly connected to the self-locking mechanism; when it is necessary to lift the float to avoid danger, the self-locking mechanism is connected to the pull ring installed on the rocker arm; one end of the lifting hydraulic cylinder is hinged to the mounting platform, and the other end is hinged to the lifting mechanism;

[0017] The lifting hydraulic cylinder extends and retracts, causing the lifting mechanism and the self-locking mechanism to move, thereby lifting or lowering the float device.

[0018] Furthermore, the float, under the action of the waves, drives the vertical rod to move up and down, which in turn drives the rocker arm to move up and down around the hinge point on the mounting platform.

[0019] Furthermore, the self-locking mechanism includes a buckle, an adjusting hydraulic cylinder, and a buckle bracket;

[0020] The self-locking mechanism is fixedly connected to the locking bracket and the lifting mechanism; the bottom of the locking bracket is hinged to the buckle, the top of the locking bracket is hinged to one end of the adjusting hydraulic cylinder, and the other end of the adjusting hydraulic cylinder is hinged to the buckle, and the buckle is adjusted to move up and down by the adjusting hydraulic cylinder;

[0021] The buckle is provided with a wedge-shaped opening, an opening and closing mechanism is provided on one side of the wedge-shaped opening, a first telescopic rod is provided at the end of the opening and closing mechanism, a buckle connector is provided on the other side of the wedge-shaped opening, and a second telescopic rod is provided at the front end of the buckle connector. In the natural state, the first telescopic rod and the second telescopic rod are on the same straight line; the opening and closing mechanism and the buckle connector are engaged and connected by the first telescopic rod and the second telescopic rod; the opening size of the wedge-shaped opening is adjusted by the first telescopic rod and the second telescopic rod.

[0022] Furthermore, the rocker arm, the pull ring, the buckle, and the opening / closing mechanism are arranged in the same vertical plane; the rocker arm and the buckle both move up and down in the vertical plane.

[0023] By controlling the setting position of the pull ring and by controlling the size of the lifting mechanism, the self-locking mechanism, and the buckle, when the rocker arm moves upward, the pull ring touches the wedge-shaped opening of the buckle and enters the interior of the buckle.

[0024] Furthermore, the self-locking mechanism also includes an unlocking hydraulic cylinder; one end of the unlocking hydraulic cylinder is hinged to the buckle, and the other end is hinged to the opening and closing mechanism.

[0025] A method for float lifting and safety avoidance in a wave energy power generation system, employing the aforementioned float lifting and safety avoidance device, the method comprising:

[0026] (1) Self-locking:

[0027] Before self-locking, the float lifting and safety device maintains the state before self-locking, which is: the lifting hydraulic cylinder and the adjusting hydraulic cylinder are fully retracted, lifting the lifting mechanism and the self-locking mechanism.

[0028] Upon receiving the lifting and safety command, the lifting hydraulic cylinder actuates to lower the self-locking mechanism. The total length 'a' of the lifting hydraulic cylinder after the piston rod extends is calculated.

[0029] Calculate the required rotation angle of the latch and the total length b of the adjusting hydraulic cylinder after the piston rod extends. Adjust the latch to the corresponding angle ζ by adjusting the hydraulic cylinder, so that the pull ring can touch the wedge-shaped opening of the latch in a direction perpendicular to the telescopic rod.

[0030] The pull ring is a hollow annular structure. When the float rises to a certain height, the pull ring installed on the rocker arm touches the wedge-shaped opening of the buckle. As the float continues to rise, the outer ring structure of the pull ring moves upward and squeezes the wedge-shaped opening, forcing the first and second telescopic rods to move to both sides and compress the spring. When the outer ring structure of the pull ring enters the interior of the buckle along the wedge-shaped opening, the hollow internal structure of the pull ring no longer squeezes the first and second telescopic rods. The first and second telescopic rods extend and reset under the action of the spring. The opening and closing mechanism and the buckle connector engage through the first and second telescopic rods, locking the pull ring in the buckle and completing the self-locking process.

[0031] (2) Lifting:

[0032] After the self-locking is completed, the piston rod of the adjusting hydraulic cylinder extends, causing the buckle to rotate along the hinge point so that the pull ring hook is at the bottom of the buckle. The lifting hydraulic cylinder moves, causing the lifting mechanism to rotate counterclockwise around the hinge point, realizing the upward lifting of the self-locking mechanism. Then, the pull ring drives the float to move upward, completing the lifting and safety operation.

[0033] Furthermore, in step (1), the calculation method for the total length 'a' of the hydraulic cylinder after the piston rod extends is as follows:

[0034] The angle θ between the joystick and the horizontal line when the joystick swings to its upper limit position is calculated as follows:

[0035] θ = arctan(H / 2L7);

[0036] The angle η between the lifting mechanism and the horizontal line is expressed as:

[0037] η = arcsin(L2 / L1) + θ + β

[0038] The total length 'a' of the lifting hydraulic cylinder after the piston rod extends is obtained:

[0039]

[0040] Angle ζ is the included angle between the first connecting line and the second connecting line. The first connecting line is the line connecting the hinge point between the locking bracket and the latch with the hinge point between the upper part of the adjusting hydraulic cylinder and the locking bracket. The second connecting line is the line connecting the hinge point between the locking bracket and the latch with the hinge point between the piston rod of the adjusting hydraulic cylinder and the latch. Angle ζ is expressed as:

[0041]

[0042] The total length b of the adjusting hydraulic cylinder after the piston rod extends is calculated as follows:

[0043]

[0044] In the above formula:

[0045] H represents the threshold wave height for activating the risk avoidance mechanism;

[0046] L1 is the distance between the hinge point between the locking bracket and the buckle and the hinge point between the lifting mechanism and the installation platform;

[0047] L2 is the distance between the center of the pull ring and the rocker arm;

[0048] L3 is the distance between the hinge point on the upper part of the lifting hydraulic cylinder and the hinge point on the mounting platform;

[0049] L4 is the distance between the hinge point between the lifting hydraulic cylinder piston rod and the lifting mechanism and the hinge point on the mounting platform;

[0050] L5 is the distance between the hinge point between the locking bracket and the buckle and the hinge point at the top of the adjusting hydraulic cylinder;

[0051] L6 is the distance between the hinge point between the locking bracket and the buckle and the hinge point between the piston rod of the adjusting hydraulic cylinder and the buckle;

[0052] L7 is the horizontal distance between the installation position of the float and the hinge point on the installation platform;

[0053] α is the angle between the line connecting the hinge point on the upper part of the lifting hydraulic cylinder and the hinge point on the mounting platform and the horizontal line;

[0054] β is the fixed angle between the line connecting the hinge point between the locking bracket and the buckle and the hinge point on the mounting platform and the lifting mechanism;

[0055] λ is the fixed angle between the line connecting the latching hinge point of the locking bracket and the hinge point on the adjusting hydraulic cylinder and the locking bracket 7;

[0056] ε is the angle of the latch in its natural state.

[0057] Furthermore, after the hazard avoidance is completed, the float lifting hazard avoidance method also includes an unlocking step, specifically:

[0058] (1) The opening and closing mechanism is lifted by the piston rod action of the unlocking hydraulic cylinder, and the wedge-shaped opening of the buckle is opened;

[0059] (2) Adjust the buckle to the original self-locking position by adjusting the hydraulic cylinder to adapt to the stroke trajectory of the float mechanism. Under the action of the float's gravity, the pull ring slides out along the wedge-shaped opening of the buckle to complete the unlocking process. The float enters the free swing state, and the lifting mechanism and self-locking mechanism are reset.

[0060] Furthermore, the method also includes:

[0061] The marine environment is monitored in real time using meteorological and hydrological monitoring equipment mounted on the wave energy power generation system;

[0062] By setting a meteorological and hydrological parameter value under a certain extreme working condition as a custom risk avoidance activation threshold, when the real-time data monitored by the meteorological and hydrological monitoring equipment is greater than the set threshold, a risk avoidance command is issued to activate the float-lifting risk avoidance mechanism.

[0063] Beneficial technical effects of the present invention:

[0064] The float lifting and safety device for wave energy power generation systems provided by this invention employs a two-stage "self-locking-lifting" safety mechanism. Under normal sea conditions, the float device and the lifting and safety device are separate. In this separated state, the wave energy power generation system can operate independently without being constrained by the safety device. Only when safety is required can the self-locking mechanism establish a connection between the lifting and safety device and the float device, thereby lifting the float. This two-step safety operation, involving self-locking and lifting, ensures the relative independence of the float device and the lifting and safety device, contributing to improved safety and reliability of the wave energy power generation system.

[0065] Appropriate self-locking and lifting mechanisms are matched to the stroke trajectory of the float device, leveraging the stable and controllable advantages of hydraulic cylinders to overcome the influence of tidal differences. Based on the stroke trajectory of the float device under different tidal differences, the extension and retraction of the adjusting and lifting hydraulic cylinders are controlled, adjusting the posture of the self-locking and lifting mechanisms. This allows the latch to track the pull ring installed on the float mechanism's rocker arm, thereby precisely completing the self-locking and lifting operations under different tidal differences.

[0066] The method provided by this invention achieves the purpose of adapting to various extreme working conditions by customizing the activation threshold of the risk avoidance mechanism, and can smoothly exit the risk avoidance state when the sea state returns to normal, ensuring the safe and reliable resumption of system operation. Attached Figure Description

[0067] Figure 1 This is a schematic diagram of a float lifting and safety device for a wave energy power generation system according to an embodiment of the present invention;

[0068] Figure 2 This is a schematic diagram of the self-locking mechanism in an embodiment of the present invention;

[0069] Figure 3a This is a schematic diagram of the structure of the self-locking mechanism in the self-locking state in an embodiment of the present invention;

[0070] Figure 3b This is a schematic diagram of the structure of the self-locking mechanism in the lifting state in an embodiment of the present invention;

[0071] Figure 3c This is a schematic diagram of the structure of the self-locking mechanism in the unlocked state in an embodiment of the present invention;

[0072] Figure 4 This is a schematic diagram of the parameters of the float lifting and safety device in the self-locking state in an embodiment of the present invention;

[0073] The attached diagram is labeled as follows: 1. Mounting platform; 2. Rocker arm; 3. Pull ring; 4. Slider; 5. Vertical rod; 6. Float; 7. Lifting mechanism; 8. Lifting hydraulic cylinder; 9. Self-locking mechanism; 10. Buckle; 11. Adjusting hydraulic cylinder; 12. Locking bracket; 13. Unlocking hydraulic cylinder; 14. Opening and closing mechanism. Detailed Implementation

[0074] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0075] Conversely, this invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of the invention as defined in the claims. Furthermore, to provide a better understanding of the invention, certain specific details are described in detail below. However, those skilled in the art will fully understand the invention even without these detailed descriptions.

[0076] This invention provides a float lifting and safety device for wave energy power generation systems, such as... Figure 1 As shown, the float lifting and safety device includes: a float device and a lifting and safety device;

[0077] The float device includes: a mounting platform 1, a rocker arm 2, a slider 4, a vertical rod 5, and a float 6;

[0078] One end of the rocker arm 2 is hinged to the mounting platform 1, and the other end is connected to the slider 4. The slider 4 can slide along the rocker arm 2. The float 6 is fixed to one end of the vertical rod 5, and the other end of the vertical rod 5 is hinged to the slider 4. Under the action of the waves, the float 6 drives the vertical rod 5 to move up and down. The vertical rod 5 further drives the slider 4 to slide along the rocker arm 2. At the same time, the rocker arm 2 rotates around the hinge point of the mounting platform 1.

[0079] In this embodiment, the lifting and safety device includes: a lifting mechanism 7, a lifting hydraulic cylinder 8, and a self-locking mechanism 9.

[0080] One end of the lifting mechanism 7 is hinged to the mounting platform 1, and the other end is fixedly connected to the self-locking mechanism 9. A pull ring 3 is mounted on the rocker arm 2; when the float needs to be lifted for safety, the pull ring connects to the self-locking mechanism 9. One end of the lifting hydraulic cylinder 8 is hinged to the mounting platform 1, and the other end is hinged to the lifting mechanism 7. The extension and retraction of the lifting hydraulic cylinder 8 drives the lifting mechanism 7 and the self-locking mechanism 9 to move, thereby lifting or lowering the float device. Under the action of waves, the float drives the vertical rod to move up and down, which in turn drives the rocker arm to move up and down around the hinge point on the mounting platform.

[0081] In this invention, although the float itself will be subject to resistance from structures such as the vertical rod, slider, and platform hinge point during its movement, compared with the method of directly using hydraulic cylinders as telescopic mechanisms for hazard avoidance, the float does not need to overcome the resistance of the telescopic mechanism under normal sea conditions, thus reducing energy consumption and improving the working efficiency of the device. Furthermore, the hazard avoidance device and the float device provided by this invention are not connected under normal sea conditions, so there will be no problems such as restraint or entanglement, which can ensure the normal operation of the wave energy power generation system.

[0082] like Figure 2 The self-locking mechanism 9 is shown, which includes a buckle 10, an adjusting hydraulic cylinder 11, and a locking bracket 12.

[0083] The self-locking mechanism 9 is fixedly connected to the lifting mechanism via the locking bracket 12; the bottom of the locking bracket is hinged to the buckle, the top of the locking bracket is hinged to one end of the adjusting hydraulic cylinder, and the other end of the adjusting hydraulic cylinder is hinged to the buckle, and the buckle is adjusted to move up and down by the adjusting hydraulic cylinder;

[0084] The buckle is provided with a wedge-shaped opening, an opening and closing mechanism is provided on one side of the wedge-shaped opening, a first telescopic rod is provided at the end of the opening and closing mechanism, a buckle connector is provided on the other side of the wedge-shaped opening, and a second telescopic rod is provided at the front end of the buckle connector. In the natural state, the first telescopic rod and the second telescopic rod are on the same straight line; the opening and closing mechanism and the buckle connector are engaged and connected by the first telescopic rod and the second telescopic rod; the opening size of the wedge-shaped opening is adjusted by the first telescopic rod and the second telescopic rod.

[0085] Specifically, the opening and closing mechanism includes a cylindrical outer shell, a first spring, and a first telescopic rod; the first spring is disposed inside the cylindrical outer shell, one end of the first spring is connected to the cylindrical outer shell, and the other end is connected to the first telescopic rod; the snap-fit ​​connector includes a snap-fit ​​outer shell, a second spring, and a second telescopic rod, the second spring is disposed inside the snap-fit ​​outer shell, one end of the second spring is connected to the snap-fit ​​outer shell, and the other end is connected to the second telescopic rod; the ends of the first telescopic rod and the second telescopic rod are snapped together.

[0086] In this embodiment, the rocker arm, the pull ring, the buckle, and the opening / closing mechanism are arranged in the same vertical plane; the rocker arm and the buckle both move up and down in the vertical plane.

[0087] By controlling the setting position of the pull ring and by controlling the size of the lifting mechanism, the self-locking mechanism, and the buckle, when the rocker arm moves upward, the pull ring touches the wedge-shaped opening of the buckle and enters the interior of the buckle.

[0088] In this embodiment, the self-locking mechanism further includes an unlocking hydraulic cylinder 13; one end of the unlocking hydraulic cylinder 13 is hinged to the buckle 10, and the other end is hinged to the opening and closing mechanism 14.

[0089] The present invention also provides an embodiment of a float lifting and safety avoidance method for a wave energy power generation system. In this embodiment, the float lifting and safety avoidance process consists of two steps: self-locking and lifting.

[0090] Self-locking:

[0091] Before self-locking, the float lifting and safety device maintains the state before self-locking, which is: the lifting hydraulic cylinder and the adjusting hydraulic cylinder are fully retracted, lifting the lifting mechanism and the self-locking mechanism.

[0092] Assuming the threshold for activating the risk aversion mechanism is H, such as Figure 4 As shown, upon receiving the lifting and safety command, the lifting hydraulic cylinder 8 actuates, thereby lowering the self-locking mechanism 9. The total length 'a' of the lifting hydraulic cylinder 8 after the piston rod extends is calculated as follows:

[0093] The method for calculating the total length 'a' of the hydraulic cylinder 8 after the piston rod extends is as follows:

[0094] The angle θ between the joystick 2 and the horizontal line when the joystick 2 swings to its upper limit position is:

[0095] θ = arctan(H / 2L7)

[0096] The angle η between the lifting mechanism 7 and the horizontal line is expressed as:

[0097] η = arcsin(L2 / L1) + θ + β

[0098] The total length 'a' of the lifting hydraulic cylinder 8 after the piston rod extends is obtained:

[0099]

[0100] Calculate the required rotation angle of the latch 10 and the total length b of the adjusting hydraulic cylinder after the piston rod extends. Adjust the latch 10 to the corresponding angle ζ by adjusting the action of the hydraulic cylinder 11, so that the pull ring 3 can touch the wedge-shaped opening of the latch 10 in a direction perpendicular to the telescopic rod.

[0101] Angle ζ is the included angle between the first connecting line and the second connecting line. The first connecting line is the line connecting the hinge point between the locking bracket 12 and the buckle 10 and the hinge point between the upper part of the adjusting hydraulic cylinder 11 and the locking bracket 12. The second connecting line is the line connecting the hinge point between the locking bracket 12 and the buckle 10 and the hinge point between the piston rod of the adjusting hydraulic cylinder 11 and the buckle 10. Angle ζ is expressed as:

[0102]

[0103] The total length b of the adjusting hydraulic cylinder 11 after the piston rod extends is calculated as follows:

[0104]

[0105] In the above formulas:

[0106] L1 is the distance between the hinge point between the locking bracket 12 and the buckle 10 and the hinge point between the lifting mechanism 7 and the mounting platform 1;

[0107] L2 is the distance between the center of pull ring 3 and rocker arm 2;

[0108] L3 is the distance between the hinge point on the upper part of the lifting hydraulic cylinder 8 and the hinge point on the mounting platform 1;

[0109] L4 is the distance between the hinge point between the piston rod of the lifting hydraulic cylinder 8 and the lifting mechanism 7 and the hinge point on the mounting platform 1.

[0110] L5 is the distance between the hinge point between the locking bracket 12 and the buckle 10 and the hinge point at the top of the adjusting hydraulic cylinder 11;

[0111] L6 is the distance between the hinge point between the locking bracket 12 and the buckle 10 and the hinge point between the piston rod of the adjusting hydraulic cylinder 11 and the buckle 10;

[0112] L7 is the horizontal distance between the installation position of float 6 and the hinge point on the installation platform 1;

[0113] α is the angle between the line connecting the hinge point on the upper part of the lifting hydraulic cylinder 11 and the hinge point on the mounting platform 1 and the horizontal line;

[0114] β is the fixed angle between the line connecting the hinge point between the locking bracket 12 and the buckle 10 and the hinge point on the mounting platform 1 and the lifting mechanism;

[0115] λ is the fixed angle between the line connecting the hinge point between the locking bracket 12 and the buckle 10 and the hinge point on the upper part of the adjusting hydraulic cylinder 11 and the locking bracket 12.

[0116] ε is the angle of the buckle 10 in its natural state;

[0117] The lifting hydraulic cylinder 8 and the adjusting hydraulic cylinder 11 can be operated automatically or remotely by the operator, and the operation can be switched on-site according to actual needs.

[0118] The pull ring is a hollow ring structure. When the float rises to a certain height, the pull ring 3 installed on the rocker arm 2 touches the wedge-shaped opening of the buckle 10.

[0119] The pull ring 3 is a hollow annular structure. When the float 3 rises to a certain height, the pull ring installed on the rocker arm touches the wedge-shaped opening of the buckle. As the float 3 continues to rise, the outer ring structure of the pull ring 3 moves upward and squeezes the wedge-shaped opening, forcing the first and second telescopic rods to move to both sides and compress the spring. When the outer ring structure of the pull ring 3 enters the interior of the buckle 10 along the wedge-shaped opening, the hollow internal structure of the pull ring 3 no longer squeezes the first and second telescopic rods. The first and second telescopic rods extend and reset under the action of the spring. The opening and closing mechanism and the buckle connector engage through the first and second telescopic rods, locking the pull ring 3 inside the buckle 10, completing the self-locking process.

[0120] Pulling: After the self-locking is completed, adjust the piston rod of the hydraulic cylinder 11 to extend, causing the buckle 10 to rotate along the hinge point so that the pull ring 3 hooks at the bottom of the buckle 10, as shown. Figure 3b As shown; the action of the lifting hydraulic cylinder 8 causes the lifting mechanism 7 to rotate counterclockwise around the hinge point, thereby lifting the self-locking mechanism 9 upward, and then driving the float 6 to move upward through the pull ring 3, completing the lifting and safety operation.

[0121] After the evacuation is completed, float 6 needs to be lowered. The float raising evacuation method also includes an unlocking step, specifically:

[0122] After the evacuation is completed, firstly, the piston rod of the unlocking hydraulic cylinder 13 is activated, lifting the opening and closing mechanism 14 and opening the wedge-shaped opening of the latch 10. Then, the hydraulic cylinder 11 is adjusted to retract, repositioning the latch 10 to its original self-locking position to accommodate the stroke trajectory of the float mechanism. Figure 3c As shown, under the action of the float's gravity, the pull ring 3 slides out along the opening at the buckle joint of the buckle 10, completing the unlocking process; the float 6 enters the free swing state, and the lifting mechanism 7 and the self-locking mechanism 9 are reset to the state before self-locking, that is, the lifting hydraulic cylinder 11 retracts to lift the lifting mechanism 7 and the self-locking mechanism 9 to the high position.

[0123] The method further includes: real-time monitoring of the marine environment using meteorological and hydrological monitoring equipment mounted on the wave energy power generation system; and setting custom risk avoidance activation thresholds based on meteorological and hydrological parameters such as wind speed and wave height under extreme conditions. For example, assuming that risk avoidance is required when the wave height in the sea area where the wave energy device is located reaches H = 5m, then in automatic control mode, when the real-time wave height data h ≥ 5m monitored by the meteorological and hydrological monitoring equipment, the system issues a boost risk avoidance command, activating the float boost risk avoidance mechanism.

[0124] The float lifting and risk avoidance method provided by this invention achieves the purpose of adapting to various extreme working conditions by customizing the activation threshold of the risk avoidance mechanism, and can smoothly exit the risk avoidance state when the sea state returns to normal, ensuring the safe and reliable resumption of system operation.

[0125] Due to factors such as sea area characteristics and load conditions, wave energy power generation systems can withstand various extreme operating conditions. By customizing the activation threshold of the risk avoidance mechanism, it is possible to adapt to various extreme operating conditions. Different activation thresholds correspond to different travel trajectories of the float mechanism, and therefore the corresponding self-locking position also changes. The self-locking position can be adjusted by adjusting the hydraulic cylinder.

[0126] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A float-lifting safety device for a wave energy power generation system, characterised in that, The float lifting safety device comprises a float device and a lifting safety device. The float device comprises a mounting platform, a rocker, a sliding block, a vertical rod and a float. One end of the rocker is hingedly mounted on the mounting platform, and the sliding block is slidably mounted on the rocker and can slide along the rocker. One end of the vertical rod is hingedly connected to the sliding block, and the other end is fixedly connected to the float. The lifting safety device comprises a lifting mechanism, a lifting hydraulic cylinder and a self-locking mechanism. One end of the lifting mechanism is hingedly connected to the mounting platform, and the other end is fixedly connected to the self-locking mechanism.

2. A float lifting safety device for a wave energy power generation system according to claim 1, wherein, When the float needs to be lifted for safety, the self-locking mechanism is connected to the pull ring mounted on the rocker.

3. A float lifting safety device for a wave energy power generation system according to claim 2, wherein, The lifting hydraulic cylinder is hingedly connected to the mounting platform at one end and to the lifting mechanism at the other end. The lifting hydraulic cylinder is hingedly connected to the mounting platform at one end and to the lifting mechanism at the other end. The lifting hydraulic cylinder is hingedly connected to the mounting platform at one end and to the lifting mechanism at the other end.

4. A float lifting safety device for a wave energy power generation system according to claim 3, wherein, The lifting hydraulic cylinder is hingedly connected to the mounting platform at one end and to the lifting mechanism at the other end. The lifting hydraulic cylinder is hingedly connected to the mounting platform at one end and to the lifting mechanism at the other end.

5. A float lifting safety device for a wave energy power generation system according to claim 3, wherein, The lifting hydraulic cylinder is hingedly connected to the mounting platform at one end and to the lifting mechanism at the other end.

6. A method for the floating body lifting risk avoidance for wave energy power generation system, using the floating body lifting risk avoidance device according to any one of claims 1-4, characterized in that, The self-locking mechanism comprises a buckle, an adjusting hydraulic cylinder and a lock bracket. The self-locking mechanism is fixedly connected to the lifting mechanism through the lock bracket. The bottom of the lock bracket is hingedly connected to the buckle, and the top of the lock bracket is hingedly connected to one end of the adjusting hydraulic cylinder. The other end of the adjusting hydraulic cylinder is hingedly connected to the buckle, and the opening size of the wedge-shaped opening can be adjusted by the adjusting hydraulic cylinder. The buckle is provided with a wedge-shaped opening, and the opening and closing mechanism is provided on one side of the wedge-shaped opening. The first telescopic rod is provided at the end of the opening and closing mechanism, and the buckle connector is provided on the other side of the wedge-shaped opening. The front end of the buckle connector is provided with a second telescopic rod, and the first telescopic rod and the second telescopic rod are on the same straight line in the natural state. The opening and closing mechanism and the buckle connector are connected by the first telescopic rod and the second telescopic rod. The rocker, the pull ring, the buckle and the opening and closing mechanism are arranged in the same vertical plane. The rocker, the buckle and the opening and closing mechanism are arranged in the same vertical plane. When the rocker moves upward, the pull ring touches the wedge-shaped opening of the buckle and enters the interior of the buckle. The self-locking mechanism further comprises an unlocking hydraulic cylinder. One end of the unlocking hydraulic cylinder is hingedly connected to the buckle, and the other end is hingedly connected to the opening and closing mechanism. The float lifting safety method comprises: (1) Self-locking: Before self-locking, the float lifting safety device maintains the pre-locking state unchanged. The pre-locking state is that the lifting hydraulic cylinder and the adjusting hydraulic cylinder are completely retracted, and the lifting mechanism and the self-locking mechanism are lifted. When the lifting safety instruction is received, the lifting hydraulic cylinder acts to lower the self-locking mechanism. The total length a of the lifting hydraulic cylinder after the piston rod is extended is calculated. Calculate the required rotation angle of the latch and the total length b of the adjusting hydraulic cylinder after the piston rod extends. Adjust the latch to the corresponding angle ζ by adjusting the hydraulic cylinder, so that the pull ring can touch the wedge-shaped opening of the latch in a direction perpendicular to the telescopic rod. The pull ring is a hollow annular structure. When the float rises to a certain height, the pull ring installed on the rocker arm touches the wedge-shaped opening of the buckle. As the float continues to rise, the outer ring structure of the pull ring moves upward and squeezes the wedge-shaped opening, forcing the first and second telescopic rods to move to both sides and compress the spring. When the outer ring structure of the pull ring enters the interior of the buckle along the wedge-shaped opening, the hollow internal structure of the pull ring no longer squeezes the first and second telescopic rods. The first and second telescopic rods extend and reset under the action of the spring. The opening and closing mechanism and the buckle connector engage through the first and second telescopic rods, locking the pull ring in the buckle and completing the self-locking process. (2) Lifting: After the self-locking is completed, the piston rod of the adjusting hydraulic cylinder extends, causing the buckle to rotate along the hinge point so that the pull ring hook is at the bottom of the buckle. The lifting hydraulic cylinder moves, causing the lifting mechanism to rotate counterclockwise around the hinge point, realizing the upward lifting of the self-locking mechanism. Then, the pull ring drives the float to move upward, completing the lifting and safety operation.

7. A method of raising a float for a wave energy power generation system according to claim 6, wherein, In step (1), the calculation method for the total length 'a' of the hydraulic cylinder after the piston rod extends is as follows: The angle θ between the joystick and the horizontal line when the joystick swings to its upper limit position is calculated as follows: θ = arctan(H / 2L7); The angle η between the lifting mechanism and the horizontal line is expressed as: η = arcsin(L2 / L1) + θ + β The total length 'a' of the lifting hydraulic cylinder after the piston rod extends is obtained: Angle ζ is the included angle between the first connecting line and the second connecting line. The first connecting line is the line connecting the hinge point between the locking bracket and the latch with the hinge point between the upper part of the adjusting hydraulic cylinder and the locking bracket. The second connecting line is the line connecting the hinge point between the locking bracket and the latch with the hinge point between the piston rod of the adjusting hydraulic cylinder and the latch. Angle ζ is expressed as: The total length b of the adjusting hydraulic cylinder after the piston rod extends is calculated as follows: In the above formula: H represents the threshold wave height for activating the risk avoidance mechanism; L1 is the distance between the hinge point between the locking bracket and the buckle and the hinge point between the lifting mechanism and the installation platform; L2 is the distance between the center of the pull ring and the rocker arm; L3 is the distance between the hinge point on the upper part of the lifting hydraulic cylinder and the hinge point on the mounting platform; L4 is the distance between the hinge point between the lifting hydraulic cylinder piston rod and the lifting mechanism and the hinge point on the mounting platform; L5 is the distance between the hinge point between the locking bracket and the buckle and the hinge point at the top of the adjusting hydraulic cylinder; L6 is the distance between the hinge point between the locking bracket and the buckle and the hinge point between the piston rod of the adjusting hydraulic cylinder and the buckle; L7 is the horizontal distance between the installation position of the float and the hinge point on the installation platform; α is the angle between the line connecting the hinge point on the upper part of the lifting hydraulic cylinder and the hinge point on the mounting platform and the horizontal line; β is the fixed angle between the line connecting the hinge point between the locking bracket and the buckle and the hinge point on the mounting platform and the lifting mechanism; λ is the fixed angle between the line connecting the latching hinge point of the locking bracket and the hinge point on the adjusting hydraulic cylinder and the locking bracket 7; ε is the angle of the latch in its natural state.

8. A method for raising a float for a wave energy power generation system according to claim 6, wherein After the hazard avoidance is completed, the float lifting hazard avoidance method also includes an unlocking step, specifically: (1) The opening and closing mechanism is lifted by the piston rod action of the unlocking hydraulic cylinder, and the wedge-shaped opening of the buckle is opened; (2) Adjust the buckle to the original self-locking position by adjusting the hydraulic cylinder to adapt to the stroke trajectory of the float mechanism. Under the action of the float's gravity, the pull ring slides out along the wedge-shaped opening at the buckle joint to complete the unlocking process. The float enters the free swing state, and the lifting mechanism and self-locking mechanism are reset.

9. A method for raising a float of a wave energy power generation system according to claim 6, characterized in that, The method further includes: The marine environment is monitored in real time using meteorological and hydrological monitoring equipment mounted on the wave energy power generation system; By setting a meteorological and hydrological parameter value under a certain extreme working condition as a custom risk avoidance activation threshold, when the real-time data monitored by the meteorological and hydrological monitoring equipment is greater than the set threshold, a risk avoidance command is issued to activate the float-lifting risk avoidance mechanism.

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