Active sand-inducing and silting-promoting device with wave-buoy oscillating wing turbine and its application

Abstract

The present invention relates to the technical field of submarine cable scour and span protection, and specifically to a wave float oscillating wing turbine active sand stirring and silting promoting device and its application, characterized in that the photovoltaic power generation component is arranged on a wave float, the wave float floats above the sea surface, and is connected to an oscillating wing turbine component via a connecting cable / rod, the oscillating wing turbine component comprises a oscillating wing turbine blade, a motor, a clutch, a turbine main shaft, a thrust bearing, a front end cover, and a rotating mechanical seal, wherein the motor is mounted on a positioning plate inside the oscillating wing turbine hub, one end of the clutch is connected to the motor main shaft, and the other end is connected to the turbine main shaft; the rotating mechanical seal dynamic ring is connected to the turbine main shaft, and the static ring fits the front end cover to ensure the watertightness of the turbine main shaft during rotation; the cable output by the wave float is penetrated through a stuffing box installed on a guide shell, and is connected to the motor to ensure the watertightness of the oscillating wing turbine component.

Description

Technical Field

[0001] The invention relates to the technical field of submarine cable scouring and span protection, and in particular to a wave float oscillating wing turbine active sand stirring and silting promoting device particularly suitable for submarine cable scouring protection and span management, and its application. Background Art

[0002] As the lifeline of marine engineering, submarine cables are responsible for transporting oil and natural gas, providing electricity, communications and other key tasks. As of 2023, the total mileage of oil and gas pipelines in service worldwide is about 2.17 million kilometers, and the total length of submarine cables exceeds 1.42 million kilometers; China has laid more than 9,000 kilometers of submarine oil and gas pipelines, and the annual delivery of submarine cables exceeds 2,900 kilometers. Under the coupling of ocean currents, cables and seabed, the seabed is prone to local scouring, resulting in suspended spans of submarine cables, affecting the service life of submarine cables, and even causing pipeline damage or cable breakage, causing huge economic losses and environmental damage.

[0003] The existing means of scour protection for submarine cables and pipes mainly include passive scour protection devices such as bionic seaweed / coral, marine engineering fabrics, concrete sinking, diversion and siltation promotion. When the sand content of the ocean current is low, the actual engineering protection effect is not ideal, and the hidden dangers of overhanging spans have not been completely eliminated. The main technologies used in the management of overhanging spans are underwater support, sand and gravel dumping, heavy ballasting, etc., which have problems such as poor control accuracy, low reliability and high management cost, and are not effective in the long term.

[0004] Active sand stirring technology can increase the sand content of the ocean current, form corresponding sediment deposition conditions according to demand, and improve the efficiency of submarine cable scour protection. However, the submarine cable scour protection device is located in a complex marine environment where no one is on duty and works for a long time. How to improve the long-term drive / energy supply problem of the device and improve the reliability and stability of the device are the key to the application and development of this type of device. Summary of the invention

[0005] In view of the current situation of submarine cable scouring and suspended spanning in the prior art and the problems existing in the existing protection and management technologies, the present invention proposes a wave float oscillating swing-wing turbine active sand-stimulating and silting-promoting device and its application, which is driven by a mixture of wave energy and light energy, has a relatively simple structure, can adapt to complex sea conditions, has high reliability and application value.

[0006] The technical solution adopted by the present invention to solve the technical problem is:

[0007] A wave float oscillating wing turbine active sand stirring and silting promoting device is provided with a photovoltaic power generation component, a connecting cable / rod and an oscillating wing turbine component, characterized in that the photovoltaic power generation component is arranged on a wave float, the wave float floats above the sea surface, and is connected to the oscillating wing turbine component via a connecting cable / rod, the oscillating wing turbine component comprises a oscillating wing turbine blade, a motor, a clutch, a turbine main shaft, a thrust bearing, a front end cover, and a rotating mechanical seal, wherein the motor is mounted on a positioning plate inside the oscillating wing turbine hub, one end of the clutch is connected to the motor main shaft, and the other end is connected to the turbine main shaft; the rotating mechanical seal dynamic ring is connected to the turbine main shaft, and the static ring fits the front end cover to ensure the watertightness of the turbine main shaft during rotation; the cable output by the wave float is inserted through a stuffing box installed on the guide shell and connected to the motor to ensure the watertightness of the oscillating wing turbine component.

[0008] The photovoltaic power generation assembly of the present invention is provided with a solar panel, the wave float has a planar upper surface, the wave float has a hollow shell, and the lower part of the hollow shell is filled with a stuffing box, the solar panel is placed on the top plane of the wave float, and is embedded to improve the life of the solar panel; the battery, the inverter and the overall controller for controlling the overall working state of the device are installed on the positioning plate inside the shell of the wave float; the cable output by the battery passes through the stuffing box installed at the bottom of the wave float to ensure the watertightness of the wave float. Furthermore, the shape of the wave float described in the present invention can be a sphere, a vertical cylinder, or a cylinder with a semi-ellipsoid / hemisphere / cone at the bottom.

[0009] The connecting cable / rod of the present invention is used to connect the wave float and the oscillating swing-wing turbine assembly, and transmit the vertical movement of the wave float assembly to the oscillating swing-wing turbine assembly. The connecting cable / rod can be a fiber composite cable, a nylon rope, a steel transmission rod, etc.

[0010] The overall controller of the present invention can accept instructions and has the function of controlling the start and stop of the motor, the speed, and the engagement and disengagement of the clutch.

[0011] The swing-wing turbine blade of the present invention is composed of a swing wing, and the blade section can be an airfoil and a flat plate with rounded leading edges and trailing edges.

[0012] The present invention also proposes an application of a wave float oscillating wing turbine active sand stirring and siltation promoting device, which is characterized in that three active sand stirring and siltation promoting modes are executed when in use: when wave resources are good, it works in mode one, the wave drives the wave float to make reciprocating vertical motion, and transmits it to the oscillating wing turbine assembly through the connecting cable / rod, and the oscillating wing turbine assembly converts the vertical motion into rotational motion. At this time, the clutch in the oscillating wing turbine assembly is in a disconnected state, and the oscillating wing turbine rotates efficiently with small resistance, thereby stirring up seabed mud; when light resources are good, it works in mode two, and the electric energy generated by the photovoltaic power generation assembly is transmitted to the motor in the oscillating wing turbine group, and the overall controller controls the clutch to close, and the electric power drives the turbine blades to rotate, thereby realizing the sand stirring and siltation promoting function; when the light and wave conditions are sufficient, it works in mode three, and executes mode one and mode two at the same time, and the overall controller controls the clutch to close, realizing the light / wave hybrid drive of the oscillating wing turbine to rotate, forming a more efficient sand stirring and siltation promoting operation mode.

[0013] In the application of the wave float oscillating wing turbine active sand stirring and silting promoting device described in the present invention, the wave float oscillating wing turbine active sand stirring and silting promoting device is connected to the oil and gas drilling platform and is provided with a connecting rod. One end of the connecting rod is connected to the platform, and the other end is hinged to the side of the wave float in the wave float oscillating wing turbine active sand stirring and silting promoting device to prevent the wave float from rotating.

[0014] In the application of the wave float oscillating wing turbine active sand stirring and silting promotion device described in the present invention, the wave float oscillating wing turbine active sand stirring and silting promotion devices are arranged in pairs in an array, and adjacent wave float oscillating wing turbine active sand stirring and silting promotion devices are connected by connecting rods and hinges to ensure the relative movement of the devices while realizing sand stirring and silting promotion operations for submarine cables far away from the drilling platform.

[0015] Compared with the prior art, the present invention has the characteristics of relatively simple structure and being driven by renewable green energy. It can realize long-term, active sand-stimulating and silting-promoting operations in complex marine environments, and greatly improve the work efficiency of submarine cable scouring and suspended span management. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attached Figure 1 It is a structural schematic diagram of the present invention.

[0017] Attached Figure 2 It is a schematic diagram of the wave float structure of the present invention.

[0018] Attached Figure 3 It is a schematic diagram of the fixing method of the solar cell panel in the present invention.

[0019] Attached Figure 4 It is a schematic diagram of the structure of the oscillating swing-wing turbine assembly in the present invention.

[0020] Attached Figure 5 It is a schematic diagram of the connection between the present invention and the oil and gas drilling platform during application.

[0021] Attached Figure 6 It is a schematic diagram of the paired array arrangement structure during the application of the present invention.

[0022] Attached Figure 7 It is a manufacturing flow chart of the present invention.

[0023] Attached Figure 8 It is a schematic diagram of the arrangement of the wave absorbing performance of the wave float during the manufacturing process of the present invention.

[0024] Attached Fig. 9 yes Figure 8 Schematic diagram of the structure of the middle damping disk, where Fig. 9 (a) is a schematic diagram of the first structure of the damping disk, (b) is a schematic diagram of the second structure of the damping disk, (c) is a schematic diagram of the third structure of the damping disk, and (d) is a schematic diagram of the fourth structure of the damping disk.

[0025] Attached Fig.10 It is a schematic diagram of the structure of the oscillating swing-wing turbine hydrodynamic performance platform.

[0026] Figure numerals: photovoltaic power generation component 1, wave float 2, connecting cable / rod 3, oscillating swing-wing turbine component 4, solar cell panel 5, wave float shell 6, overall controller 7, positioning plate in wave float 8, cable 9, stuffing box at the bottom of wave float 10, top end cover of wave float 11, surrounding edge 12, rubber gasket 13, swing-wing turbine blade 14, front end cover 15, rotating mechanical seal 16, bearing 17, turbine main shaft 18, clutch 19, built-in positioning plate 20 of oscillating swing-wing turbine hub, motor 21, oscillating swing-wing turbine hub 22, stuffing box 23, lifting ring 24, guide housing 25, hinge 27, connecting rod 28, second hinge 29, second connecting rod 30, platform connecting rod 31, damping disc 32, ballast 33, locking nut 34, mounting bracket 35, test platform motor 36, screw 37, slide rail 38, thrust sensor and torque sensor 39, slider 40. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] Example:

[0029] This example provides a wave float-oscillating wing turbine active sand-inducing and silting-promoting device driven by light or wave hybrid, which is used for submarine cable scour protection and overhang management. It has the advantages of green energy drive, relatively simple structure, adaptability to complex sea conditions, high reliability and application value.

[0030] Among them, as attached Figure 1 As shown, in this example, the photovoltaic power generation component 1 is integrated on the wave buoy 2, the wave buoy 2 floats on the sea surface, and the oscillating swing-blade turbine component 4 is connected to the wave buoy component 1 through a connecting cable / rod 3.

[0031] Figure 2 The schematic diagram of the wave float assembly structure is characterized in that in the photovoltaic power generation system 1, the solar panel 5 is placed on the top of the wave float 2, and the battery, inverter and device overall controller 7 are installed on the positioning plate 8 inside the wave float; the cable 9 output by the battery passes through the stuffing box 10 installed at the bottom of the wave float to ensure the watertightness of the wave float; the material of the wave float shell 6 can be steel, nylon, fiberglass;

[0032] Figure 3 : is a schematic diagram of the fixing structure of the solar panel 5 in this example. To ensure the service life of the solar panel, the solar panel 5 in this example is embedded on the top end cover 11 of the wave float, and a surrounding edge 12 is provided around the solar panel 5. A rubber gasket 13 is provided between the surrounding edge 12 and the solar panel 5 to play a compacting and fixing role;

[0033] Figure 4 is a schematic diagram of the structure of an oscillating wing turbine assembly, which is connected to the Figure 1 The swing-wing turbine blade 14 is connected to one end of the turbine main shaft 18. The other end of the main shaft 18 is first connected to the clutch 19 through the rotating mechanical seal 16 fixed to the front cover 15 through the bearing 17. The other end of the clutch 19 is connected to the main shaft of the motor 21, and the motor is installed on the built-in positioning plate 20 of the oscillating swing-wing turbine hub 22. Figure 2 The output cable 9 is connected to the motor 21 through a stuffing box 23. In order to ensure that water can flow smoothly through the component during the oscillating movement, a guide housing 25 is installed on the hub 21.

[0034] The device of the present invention is used in sand stirring and silting promotion operations. Figure 1 The rotation of the oscillating blade turbine 4 will be transmitted to the wave float assembly 2 through the connecting cable / rod 3, which is not conducive to the operation and maintenance of the device. To solve this problem, the present invention proposes a solution, in which a hinge 27 is used on the side of the wave float to connect with a connecting rod 28, and the other end of the connecting rod 28 is connected to the oil and gas drilling platform 26, such as Figure 5 or a second hinge 29 is connected to a second connecting rod 30 on the side of the wave float, and the other end of the second connecting rod 30 is also connected to a wave float of another device in a hinged form, such as Figure 6 As shown, such a structural form avoids the rotational movement of the wave float without affecting the vertical movement of the wave float, and also ensures that the device of the present invention and the oil and gas drilling platform or device do not collide with each other when they are arranged in pairs.

[0035] This example has three working modes, and its working principle is: a): When wave resources are good, the waves drive the wave float to make reciprocating vertical motion, and the motion is transmitted to the oscillating swing-wing turbine through the connecting cable / rod. The oscillating swing-wing turbine converts the vertical motion into rotational motion. At this time, the clutch is in a disconnected state, and the oscillating swing-wing turbine rotates efficiently with less resistance, thereby stirring up the seabed mud; b): When light resources are good, the device transmits the electric energy generated by the photovoltaic power generation system to the built-in electric motor of the oscillating swing-wing turbine, the controller controls the clutch to close, and the electric power drives the turbine to rotate, realizing the function of sand stirring and silting; c): When both light and wave resources are relatively sufficient, the first two models work together, and the controller controls the clutch to close, realizing the light / wave hybrid drive of the oscillating swing-wing turbine to rotate, forming a more efficient sand stirring and silting operation mode.

[0036] This example further provides a design method for the device, such as Figure 7 As shown, the steps of the method are as follows:

[0037] Step 1: Determine the sea conditions: determine the annual average wave period and wave height, current velocity, and seabed sediment particle size in the sea area where the device is deployed;

[0038] Step 2: Wave buoy absorption performance: Design wave buoys and damping discs with different diameters. The model is as follows: Figure 8 As shown, the wave float 1 is connected to the damping disk 32 through the platform connecting rod 31, and the ballast 33 is mounted under the damping disk 32 and fixed by the locking nut 34. The numerical simulation calculation or physical experimental test method is used to analyze the float motion response and damping of the damping disk under different float diameters, damping disk diameters and ballast conditions under given wave conditions, and calculate the wave absorbing efficiency of the wave float. The damping disk structure is as follows: Fig. 9 As shown;

[0039] Step 3: Oscillating wing turbine hydrodynamic performance: Develop an oscillating wing turbine performance test platform, the structure is shown in the figure below: Fig.10As shown, the platform is fixed on the pool or sink by a mounting bracket 35, and the oscillating swing-wing turbine 4 is connected to the slide rail 38 and the lead screw 37 through a slider 40. The motion response of the wave float obtained in the above step 2 is used as the input of the test platform motor 36 to control the oscillating swing-wing turbine 4 to perform a specified regular oscillating motion on the slide rail 38; the vertical damping, rotational torque and average speed of a swing-wing turbine of a certain diameter under a given oscillating motion are tested by a thrust sensor and a torque sensor 39, and compared with the damping of the damping disk obtained in the above step 2. If the two dampings are similar, it is considered that the design meets the requirements and a torque sensor is given. The corresponding wave float size and oscillating swing-wing turbine diameter are obtained, and the next step of the device performance test is carried out. If the two dampings are not close, first adjust the oscillating swing-wing turbine diameter, test the damping of the oscillating swing-wing turbine under the new diameter, and judge whether the two dampings are close or not. If they are close, proceed to the next step. If not, repeat the modification of the oscillating swing-wing turbine diameter; the wave float diameter can also be adjusted, and steps 2 and 3 are repeated. Through steps 2 and 3, the integrated matching design of the wave float and the oscillating swing-wing turbine under given sea conditions can be realized, the geometric parameters of the float and the oscillating swing-wing turbine are given, and the device is developed and assembled.

[0040] Step 4: Sand-stimulating and silting-promoting performance test of the whole device: complete the joint debugging of the control system; complete the sand-stimulating and silting-promoting performance test of the whole device under the corresponding water flow velocity, wave conditions and sediment particle size in the wave flow pool or inner wave water tank; complete the electric drive sand-stimulating and silting-promoting performance test of the whole device under the condition of flow but no wave; complete the sand-stimulating and silting-promoting performance test of the whole device under the combined light / wave drive.

[0041] Compared with the prior art, the present invention has the characteristics of relatively simple structure and being driven by renewable green energy. It can realize long-term, active sand-stimulating and silting-promoting operations in complex marine environments, and greatly improve the work efficiency of submarine cable scouring and suspended span management.

Claims

1. A wave float oscillating wing turbine active sand stirring and silting promoting device, comprising a photovoltaic power generation assembly, a connecting cable / rod and an oscillating wing turbine assembly, characterized in that: The photovoltaic power generation assembly is arranged on a wave float, which floats on the sea surface and is connected to an oscillating swing-wing turbine assembly via a connecting cable / rod. The oscillating swing-wing turbine assembly includes a swing-wing turbine blade, a motor, a clutch, a turbine main shaft, a thrust bearing, a front end cover, and a rotating mechanical seal, wherein the motor is mounted on a positioning plate inside the oscillating swing-wing turbine hub, one end of the clutch is connected to the motor main shaft, and the other end is connected to the turbine main shaft; the rotating mechanical seal dynamic ring is connected to the turbine main shaft, and the static ring fits the front end cover to ensure the watertightness of the turbine main shaft during rotation; the cable output by the wave float is inserted through a stuffing box installed on the guide housing and connected to the motor to ensure the watertightness of the oscillating swing-wing turbine assembly; the wave float oscillating swing-wing turbine active sand-stimulating and silting-promoting device is obtained by the following steps: Step 1: Determine the sea conditions: determine the annual average wave period and wave height, current velocity, and seabed sediment particle size in the sea area where the device is deployed; Step 2: Wave buoy wave absorption performance: Design wave buoys and damping discs of different diameters. The wave buoys are connected to the damping discs through platform connecting rods. Ballast is mounted under the damping discs and fixed with locking nuts. Numerical simulation calculations or physical experimental tests are used to analyze the buoy motion response and damping of the damping disc under different buoy diameters, damping disc diameters and ballast conditions under given wave conditions, and calculate the wave absorption efficiency of the wave buoys. Step 3: Hydrodynamic performance of oscillating wing turbine: The oscillating wing turbine performance test platform is fixed on the pool or sink through the mounting bracket. The oscillating wing turbine is connected to the slide rail and the lead screw through the slider. The motion response of the wave float obtained in step 2 is used as the input of the test platform motor to control the oscillating wing turbine to perform a specified regular oscillating motion on the slide rail. The vertical damping, rotational torque and average speed of a wing turbine of a certain diameter under a given oscillating motion are tested by the thrust sensor and the torque sensor, and compared with the damping of the damping disk obtained in step 2. If the two dampings are similar, it is considered that the design meets the requirements. , give the corresponding wave float size and oscillating swing-wing turbine diameter, and carry out the next step of device performance test. If the two dampings are not close, first adjust the oscillating swing-wing turbine diameter, test the damping of the oscillating swing-wing turbine under the new diameter, and judge whether the two dampings are close or not. If they are close, proceed to the next step. If they are not close, repeat the modification of the oscillating swing-wing turbine diameter; or, adjust the wave float diameter, repeat steps 2 and 3, and through steps 2 and 3, realize the integrated matching design of the wave float and the oscillating swing-wing turbine under given sea conditions, give the geometric parameters of the float and the oscillating swing-wing turbine, and develop and assemble the device.

2. The wave float oscillating wing turbine active sand stirring and silting promoting device according to claim 1 is characterized in that: The photovoltaic power generation assembly is provided with a solar panel, the wave float has a planar upper surface, the wave float has a hollow shell, and the lower part of the hollow shell is filled with a stuffing box, the solar panel is placed on the top plane of the wave float and is embedded, the battery, the inverter and the overall controller for controlling the overall working state of the device are installed on the positioning plate inside the shell of the wave float; the cable output by the battery passes through the stuffing box installed at the bottom of the wave float to ensure the watertightness of the wave float, and the shape of the wave float adopts a sphere, a vertical cylinder, and a cylinder with a semi-ellipsoid / hemisphere / cone at the bottom.

3. The wave float oscillating wing turbine active sand stirring and silting promoting device according to claim 2 is characterized in that: The connecting cable / rod is used to connect the wave float and the oscillating swing-wing turbine assembly and transmit the vertical movement of the wave float assembly to the oscillating swing-wing turbine assembly. The connecting cable / rod is any one of a fiber composite cable, a nylon rope, and a steel transmission rod.

4. The wave float oscillating wing turbine active sand stirring and silting promoting device according to claim 3 is characterized in that: The swing-wing turbine blade is composed of a swing wing, and the blade section is an airfoil or a flat plate with rounded leading edges and trailing edges.

5. An application of the wave float oscillating wing turbine active sand stirring and silting promoting device as claimed in any one of claims 1 to 4, characterized in that: When in use, three active sand-beating and silt-promoting modes are executed: when wave resources are good, it works in mode one, and the waves drive the wave float to make reciprocating vertical motion, and transmit it to the oscillating swing-wing turbine assembly through the connecting cable / rod. The oscillating swing-wing turbine assembly converts the vertical motion into rotational motion. At this time, the clutch in the oscillating swing-wing turbine assembly is in a disconnected state, and the oscillating swing-wing turbine rotates efficiently with small resistance, thereby stirring up the seabed mud; when light resources are good, it works in mode two, and the electric energy generated by the photovoltaic power generation assembly is transmitted to the motor in the oscillating swing-wing turbine group, and the overall controller controls the clutch to close, and the electric power drives the turbine blades to rotate, thereby realizing the function of sand-beating and silt-promoting; when both light and wave conditions are sufficient, it works in mode three, and executes mode one and mode two at the same time. The overall controller controls the clutch to close, and realizes the light / wave hybrid drive of the oscillating swing-wing turbine to rotate, forming a more efficient sand-beating and silt-promoting operation mode.

6. The application of the wave float oscillating wing turbine active sand stirring and silting promoting device according to claim 5 is characterized in that: In the application of the wave float oscillating swing wing turbine active sand stirring and silting promoting device, the wave float oscillating swing wing turbine active sand stirring and silting promoting device is connected to the oil and gas drilling platform and is provided with a connecting rod. One end of the connecting rod is connected to the platform, and the other end is hinged to the side of the wave float in the wave float oscillating swing wing turbine active sand stirring and silting promoting device to prevent the wave float from rotating.

7. The use of the wave float oscillating wing turbine active sand stirring and silting promoting device according to claim 5 is characterized in that: In the application of the wave float oscillation swing wing turbine active sand stirring and silting promotion device, the wave float oscillation swing wing turbine active sand stirring and silting promotion devices are arranged in pairs, and adjacent wave float oscillation swing wing turbine active sand stirring and silting promotion devices are connected by connecting rods and hinges to ensure the relative movement of the devices while realizing sand stirring and silting promotion operations for submarine cables far away from the drilling platform.

Images