Deep-sea platform energy self-supply apparatus and control method therefor

Abstract

A deep-sea platform energy self-supply apparatus and a control method therefor. The apparatus comprises a work platform (1) of the deep-sea platform, and further comprises: pontoons (2) mounted at the bottom of the work platform (1); a wave energy piezoelectric assembly (3) which is provided at the bottom of the work platform (1), moves around the periphery of the pontoons (2), and can consume wave energy and convert wave energy into electrical energy; and a marine current energy piezoelectric assembly (4) provided at the bottoms of the pontoons and capable of consuming marine current energy and converting marine current energy into electrical energy. The angles and heights of wave energy piezoelectric plates (3) and marine current energy piezoelectric plates (4) are adjustable, which can effectively improve the energy conversion efficiency and consume fluid kinetic energy during the conversion of fluid kinetic energy into electrical energy such that the amplitude of waves decreases as fluid kinetic energy decreases, thereby implementing a wave dissipation effect and facilitating the improvement of the stability of the deep-sea platform.

Description

Deep-sea platform energy self-supply device and control method thereof TECHNICAL FIELD

[0001] The present application belongs to the technical field of deep-sea platforms, and particularly relates to a deep-sea platform energy self-supply device and a control method thereof. BACKGROUND

[0002] The current energy supply of deep-sea platforms mainly relies on high-density batteries and external cables, both of which face many challenges in cost control and environmental protection. To achieve sustainable development of deep-sea platforms, energy self-supply becomes a key breakthrough. By utilizing renewable energy such as offshore wind energy, solar energy, ocean current energy, and wave energy, combined with high-efficiency energy conversion technology, the traditional high-density battery power supply mode is gradually replaced, which is an important development direction for future deep-sea platform energy supply. The development and application of deep-sea platform energy self-supply technology not only has important economic value, but also plays a profound environmental protection role in promoting energy structure transformation, achieving global carbon neutralization, and promoting sustainable development.

[0003] In the prior art, in addition to the challenges of energy supply, deep-sea platforms also need to cope with extremely harsh natural environments. Deep-sea areas are constantly impacted by strong winds, huge waves, and complex ocean currents, and various environmental factors interweave to form complex dynamic loads, posing a serious threat to the structural safety of the platform. SUMMARY

[0004] The first object of the present application is to provide a deep-sea platform energy self-supply device that can alleviate the impact of dynamic loads on the platform and utilize fluid kinetic energy.

[0005] The second object of the present application is to provide a control method for a deep-sea platform energy self-supply device.

[0006] Technical solution: The present application discloses a deep-sea platform energy self-supply device, which comprises a working platform of a deep-sea platform, a float installed at the bottom of the working platform, a wave energy piezoelectric assembly arranged at the bottom of the working platform and capable of consuming wave energy and converting the wave energy into electric energy, and a sea current energy piezoelectric assembly arranged at the bottom of the float and capable of consuming sea current energy and converting the sea current energy into electric energy; the wave energy piezoelectric assembly comprises an electric sliding rail installed at the bottom of the working platform and surrounding the outer periphery of the float, a support connecting piece connected with the sliding block of the electric sliding rail and capable of ascending and descending, four groups of first clamping jaw pieces arranged in a rectangular array and installed on the support connecting piece, and a wave energy piezoelectric plate detachably connected with the first clamping jaw pieces and capable of rotating around the central axis of the connection between the first clamping jaw pieces and the wave energy piezoelectric plate.

[0007] Further, the support connecting piece comprises a mounting plate fixedly connected with the slider of the electric sliding rail, a first oil cylinder hingedly connected at the bottom end of the mounting plate, a second oil cylinder arranged directly below the first oil cylinder, and a non-damping double-head oil cylinder arranged between the first oil cylinder and the second oil cylinder and fixedly connected at both ends with the movable ends of the first oil cylinder and the second oil cylinder.

[0008] Further, the support connecting piece further comprises a third oil cylinder, which is arranged obliquely and hingedly connected at both ends with the mounting plate and the movable end of the first oil cylinder, and the third oil cylinder is arranged at the side of the first oil cylinder close to the buoy.

[0009] Further, the first clamping jaw piece comprises a fourth oil cylinder arranged obliquely and hingedly connected at one end with the fixed end of the second oil cylinder, a fifth oil cylinder hingedly connected with the movable end of the fourth oil cylinder, a first connecting rod arranged perpendicularly with the fifth oil cylinder and fixedly connected at the movable end thereof, an electromagnetic plate fixedly connected with the other end of the first connecting rod, and a connecting shaft fixedly connected with the electromagnetic plate, the connecting shaft is movably inserted into the connecting hole arranged on the side of the wave energy piezoelectric plate, and the electromagnetic plate is electromagnetically attracted and connected with the magnetic attraction piece fixedly arranged on the side of the wave energy piezoelectric plate.

[0010] Further, the ocean current energy piezoelectric assembly comprises a bottom bin fixedly connected with the bottom end of the buoy and having an opening at the bottom, a motor fixedly installed in the bottom bin, a sixth oil cylinder connected with the output shaft of the motor through a shaft coupling, two groups of second clamping jaw pieces symmetrically installed on the sixth oil cylinder, and an ocean current energy piezoelectric plate installed between the two groups of second clamping jaw pieces and adjustable in angle.

[0011] Further, the second clamping jaw piece comprises a seventh oil cylinder fixedly connected at one end with the sixth oil cylinder, a second connecting rod arranged perpendicularly with the seventh oil cylinder and fixedly connected at the movable end thereof, a connecting plate fixedly connected at the other end of the second connecting rod, and a limiting piece detachably installed on the connecting plate and inserted into the clamping groove arranged on the ocean current energy piezoelectric plate.

[0012] Based on the same inventive concept, the application further discloses a control method of the deep-sea platform energy self-supply device, comprising the following steps,

[0013] S1: acquiring real-time ocean working condition data through the detection equipment of the deep-sea platform;

[0014] S2: judging whether the ocean working condition data belongs to a preset working condition, if yes, adjusting the wave energy piezoelectric assembly and the ocean current energy piezoelectric assembly to a working state, and if not, adjusting the wave energy piezoelectric assembly and the ocean current energy piezoelectric assembly to a trimming state;

[0015] S3: When the wave energy piezoelectric assembly and the ocean current energy piezoelectric assembly are in the working state, the wave impact the wave energy piezoelectric plate to make it mechanical deformation, and the wave energy piezoelectric plate converts mechanical energy into electrical energy; the ocean current impact the ocean current energy piezoelectric plate to make it mechanical deformation, and the ocean current energy piezoelectric plate converts mechanical energy into electrical energy.

[0016] Further, the sea working condition data in step S1 includes the ocean current flow rate v and the wave amplitude γ; the working condition in step S2 is 0.05 m / s < v < 1.04 m / s and 0.1 m < γ < 1 m.

[0017] Further, the way of adjusting the wave energy piezoelectric assembly to the working state in step S2 is as follows:

[0018] According to the current wave direction, the electric sliding rail is controlled to move the wave energy piezoelectric plate to face the wave direction;

[0019] According to the current wave direction, the first jaw part on the right side of the wave energy piezoelectric plate facing the wave direction is selected to be connected with the wave energy piezoelectric plate, and the other first jaw parts are released; wherein the way of releasing the first jaw part is to disconnect the power supply of the electromagnetic plate, control the fifth oil cylinder and the fourth oil cylinder to extend to move the first connecting rod away from the wave energy piezoelectric plate, until the connecting shaft is separated from the wave energy piezoelectric plate;

[0020] Disconnect the power supply of the electromagnetic plate of the first jaw part connected with the wave energy piezoelectric plate, rotate the wave energy piezoelectric plate to make it tilt towards the wave direction, and then connect the power supply of the electromagnetic plate of the first jaw part to fix the wave energy piezoelectric plate at the current position;

[0021] Control the first oil cylinder and the second oil cylinder to lower the wave energy piezoelectric plate until the draft depth of the wave energy piezoelectric plate is half of its height;

[0022] The way of adjusting the wave energy piezoelectric assembly to the trimming state in step S2 is to control the first oil cylinder and the second oil cylinder to move the wave energy piezoelectric plate linearly to the limit position, and then control the third oil cylinder and the first oil cylinder to move the wave energy piezoelectric plate to the limit position towards the working platform.

[0023] Further, the way of adjusting the ocean current energy piezoelectric assembly to the working state in step S2 is as follows:

[0024] According to the current ocean current flow rate, the stopper with the corresponding angle is selected to be installed on the connecting plate, and the ocean current energy piezoelectric plate is installed on the two groups of second jaw parts through the stopper and the clamping groove; when 0.05 m / s < v ≤ 0.4 m / s, the stopper with 60° is selected; when 0.4 m / s < v ≤ 0.7 m / s, the stopper with 45° is selected; when 0.7 m / s < v ≤ 1.04 m / s, the stopper with 30° is selected;

[0025] According to the current wave direction, the motor is controlled to make the ocean current energy piezoelectric plate move to face the wave direction;

[0026] The sixth oil cylinder is controlled to make the ocean current energy piezoelectric plate move downward to the outside of the bottom bin;

[0027] The sixth oil cylinder is controlled to make the ocean current energy piezoelectric plate move downward to the outside of the bottom bin.

[0028] Beneficial effects: compared with the prior art, the present application has the following obvious advantages: the wave energy piezoelectric plate and the ocean current energy piezoelectric plate directly convert the fluid kinetic energy in the ocean into electric energy, which can supply power to the deep sea platform and realize energy self-supply of the deep sea platform, on the other hand, the wave energy piezoelectric plate and the ocean current energy piezoelectric plate consume fluid kinetic energy during the conversion of fluid kinetic energy into electric energy, so that the amplitude of the wave decreases with the decrease of the fluid kinetic energy, thereby playing a wave-absorbing role, which is beneficial to improve the stability of the deep sea platform during operation and prolong the service life of the deep sea platform.

[0029] The angle and height of the wave energy piezoelectric plate and the ocean current energy piezoelectric plate can be adjusted, which can effectively improve the energy conversion efficiency; when the wave energy piezoelectric plate and the ocean current energy piezoelectric plate are not used, they can be stored in a relatively safe and stable environment, which is beneficial to reduce the maintenance difficulty and prolong the service life. BRIEF DESCRIPTION OF DRAWINGS

[0030] Fig. 1 is a structural schematic diagram of the present application;

[0031] Fig. 2 is a partial structural schematic diagram of the electric sliding rail of the present application;

[0032] Fig. 3 is a partial structural schematic diagram of the wave energy piezoelectric assembly of the present application;

[0033] Fig. 4 is a structural schematic diagram of the first clamping jaw and the wave energy piezoelectric plate of the present application;

[0034] Fig. 5 is a structural schematic diagram of the wave energy piezoelectric plate when it is stored;

[0035] Fig. 6 is a structural schematic diagram of the ocean current energy piezoelectric assembly of the present application;

[0036] Fig. 7 is a sectional view of the bottom bin of the present application;

[0037] Fig. 8 is a structural schematic diagram of the second clamping jaw and the ocean current energy piezoelectric plate of the present application;

[0038] Fig. 9 is a structural schematic diagram of the connecting plate and the stopper of the present application;

[0039] Fig. 10 is a theoretical calculation schematic model diagram of the wave energy piezoelectric plate of the present application.

[0040] Figure 11 is a schematic diagram of strain energy efficiency of the wave energy piezoelectric plate of the embodiment of the present application and the first clamping jaw piece of different sides. DETAILED DESCRIPTION

[0041] The technical solutions of the present application are further described below in combination with the drawings.

[0042] Example 1

[0043] The deep-sea platform energy self-supply device disclosed by the present application, as shown in Figure 1, comprises a working platform 1 of a deep-sea platform, a float 2, a wave energy piezoelectric assembly 3 and a sea current energy piezoelectric assembly 4; the float 2 is provided in plurality, and the plurality of floats 2 are fixedly installed in a matrix array distribution manner at the bottom of the working platform 1; the wave energy piezoelectric assembly 3 is arranged at the bottom of the working platform 1 and surrounds the outer periphery of the float 2, and the wave energy piezoelectric assembly 3 can consume wave energy and convert the wave energy into electric energy; the sea current energy piezoelectric assembly 4 is arranged at the bottom of the float 2, and the sea current energy piezoelectric assembly 4 can consume sea current energy and convert the sea current energy into electric energy. In actual use, the deep-sea platform is provided with conversion equipment and electric energy storage equipment matched with the wave energy piezoelectric assembly 3 and the sea current energy piezoelectric assembly 4, and the electric energy generated by the wave energy piezoelectric assembly 3 under the action of waves and the electric energy generated by the sea current energy piezoelectric assembly 4 under the action of sea currents are stored in the storage equipment after being processed by the conversion equipment, thereby supplying power to the deep-sea platform. The wave energy piezoelectric assembly 3 converts the potential energy of wave impact into electric energy, and the sea current energy piezoelectric assembly 4 converts the potential energy of sea current impact into electric energy. The wave energy piezoelectric assembly 3 and the sea current energy piezoelectric assembly 4 not only can generate electricity by utilizing the wave and sea current potential energy of the ocean, but also consume the fluid kinetic energy in the ocean, which naturally makes the amplitude of the wave decrease with the decrease of the fluid kinetic energy, thereby playing a wave-absorbing role, i.e. reducing the fatigue damage of the wave force to the working platform 1, which is beneficial to improving the stability of the working platform 1 during operation and prolonging the service life of the working platform 1.

[0044] As shown in FIGS. 1-4, the wave energy piezoelectric assembly 3 comprises an electric sliding rail 5, a mounting plate 6, a wave energy piezoelectric plate 7, a first oil cylinder 8, a second oil cylinder 9, a non-damping double-end oil cylinder 10, a third oil cylinder 11, a fourth oil cylinder 12, a fifth oil cylinder 13, a first connecting rod 14, an electromagnetic plate 15, and a connecting shaft 16. The electric sliding rail 5 is installed at the bottom of the working platform 1 and is arranged around the outer periphery of the buoy 2. The mounting plate 6, the first oil cylinder 8, the second oil cylinder 9, the non-damping double-end oil cylinder 10, and the third oil cylinder 11 constitute a support connecting piece, which is installed on the sliding block of the electric sliding rail 5. The mounting plate 6 is fixedly connected with the sliding block of the electric sliding rail 5. The fixed end of the first oil cylinder 8 is hingedly connected with the mounting plate 6. The second oil cylinder 9 is located directly below the first oil cylinder 8. The non-damping double-end oil cylinder 10 is located between the first oil cylinder 8 and the second oil cylinder 9 and is fixedly connected with the movable ends of the two oil cylinders at both ends. The third oil cylinder 11 is located on the side of the first oil cylinder 8 close to the buoy 2. The third oil cylinder 11 is arranged obliquely and is hingedly connected with the mounting plate 6 and the movable end of the first oil cylinder 8 at both ends. The fourth oil cylinder 12, the fifth oil cylinder 13, the first connecting rod 14, the electromagnetic plate 15, and the connecting shaft 16 constitute a first clamping jaw piece, which is detachably connected with the wave energy piezoelectric plate 7. There are four groups of the first clamping jaw pieces, which are arranged in a matrix array, i.e., each group of the first clamping jaw pieces is detachably connected with one side of the wave energy piezoelectric plate 7. When the wave energy piezoelectric plate 7 is connected with one group of the first clamping jaw pieces or symmetrically connected with two groups of the first clamping jaw pieces, the wave energy piezoelectric plate 7 can rotate relative to the central axis of the connection between the wave energy piezoelectric plate 7 and the first clamping jaw pieces. The fourth oil cylinder 12 is arranged obliquely and is hingedly connected with the fixed end of the second oil cylinder 9. A clamp is installed on the fixed part of the second oil cylinder 9 and is hingedly connected with the fourth oil cylinder 12. The fifth oil cylinder 13 is hingedly connected with the movable end of the fourth oil cylinder 12. The fixed end of the fifth oil cylinder 13 is hingedly connected with the fixed end of the second oil cylinder 9. The first connecting rod 14 is arranged perpendicularly with the fourth oil cylinder 12 and is fixedly connected with the movable end of the fifth oil cylinder 13 at one end. The electromagnetic plate 15 is fixedly connected with the other end of the first connecting rod 14. The connecting shaft 16 is fixedly connected with the electromagnetic plate 15. The wave energy piezoelectric plate 7 is provided with a connecting hole movably inserted with the connecting shaft 16 on the side surface. The side surface of the wave energy piezoelectric plate 7 is provided with a magnetic attraction piece matched with the electromagnetic plate 15.

[0045] When the wave energy piezoelectric assembly 3 is in a non-working state, such as extreme weather or no ocean waves, four sets of first clamping jaw pieces are connected with the four sides of the wave energy piezoelectric plate 7 respectively, the electromagnetic plates 15 of the four sets of first clamping jaw pieces are in an energized state, so that the electromagnetic plates 15 attract and fix the wave energy piezoelectric plate 7 through the magnetic attraction pieces, the electromagnetic plates 15 can also be in a de-energized state, and the four connecting shafts 16 are connected with the four sides of the wave energy piezoelectric plate 7 respectively to ensure the stability thereof; cooperating with the third oil cylinder 11 and the first oil cylinder 8 makes the first clamping jaw piece drive the wave energy piezoelectric plate 7 to move vertically to the highest limit position, and then cooperating with the third oil cylinder 11 and the first oil cylinder 8 makes the first clamping jaw piece drive the wave energy piezoelectric plate 7 to move to the limit position towards the direction of the buoy 2, and finally the wave energy piezoelectric plate 7 is stored in the current position, as shown in FIG. 5, which reduces the damage of extreme weather to the wave energy piezoelectric plate 7 and is conducive to protecting the wave energy piezoelectric plate 7. When the wave energy piezoelectric assembly 3 needs to be used, according to the current wave direction, the wave energy piezoelectric plate 7 is controlled to move to the direction facing the wave by the electric sliding rail 5; then the first clamping jaw piece on the right side of the wave energy piezoelectric plate 7 facing the wave direction is selected to be connected with the wave energy piezoelectric plate 7, and the other first clamping jaw pieces are released, the release mode of the first clamping jaw piece is to disconnect the power supply of the electromagnetic plate 15, the fifth oil cylinder 13 and the fourth oil cylinder 12 are controlled to extend to make the first connecting rod 14 move away from the wave energy piezoelectric plate 7, until the connecting shaft 16 is separated from the wave energy piezoelectric plate 7, preferably, the fifth oil cylinder 13 and the fourth oil cylinder 12 of the first clamping jaw piece separated from the wave energy piezoelectric plate 7 are controlled to make the corresponding electromagnetic plate 15 rotate upward until the electromagnetic plate 15 does not contact the sea surface, which can prevent the electromagnetic plate 15 from being affected by the sea wave impacting the wave energy piezoelectric plate 7; then the angle of the wave energy piezoelectric plate 7 is adjusted, the power supply of the electromagnetic plate 15 of the first clamping jaw piece connected with the wave energy piezoelectric plate 7 is disconnected, the wave energy piezoelectric plate 7 is rotated to be inclined towards the wave direction, and then the power supply of the electromagnetic plate 15 of the first clamping jaw piece is connected to fix the wave energy piezoelectric plate 7 in the current position; cooperating with the third oil cylinder 11 and the first oil cylinder 8 makes the first clamping jaw piece drive the wave energy piezoelectric plate 7 to move to the limit position towards the direction of the buoy 2 (i.e. the first oil cylinder 8 is in a vertical state), and then cooperating with the third oil cylinder 11 and the first oil cylinder 8 makes the first clamping jaw piece drive the wave energy piezoelectric plate 7 to move linearly downward until the draft of the wave energy piezoelectric plate 7 is half of the height of the wave energy piezoelectric plate 7, the wave impacting the wave energy piezoelectric plate 7 makes it mechanically deform, the wave energy piezoelectric plate 7 converts mechanical energy into electrical energy, and the setting of the undamped double-headed oil cylinder 10 makes the wave energy piezoelectric plate 7 can move up and down within a certain range based on the current height to cooperate with the wave impacting the wave energy piezoelectric plate 7.

[0046] As shown in FIG. 1, FIG. 6 to FIG. 9, the ocean current energy piezoelectric assembly 4 comprises a bottom bin 17, a motor 18, a sixth oil cylinder 19, a seventh oil cylinder 20, a second connecting rod 21, a connecting plate 22, a stopper 23 and an ocean current energy piezoelectric plate 24;The bottom bin 17 is fixedly connected with the bottom end of the buoy 2, and the bottom of the bottom bin 17 has an opening, the motor 18 is fixedly installed in the inside of the bottom bin 17, and the sixth oil cylinder 19 is fixedly connected with the output shaft of the motor 18 through a shaft coupling;Wherein the seventh oil cylinder 20, the second connecting rod 21, the connecting plate 22 and the stopper 23 constitute a second jaw piece, two groups of second jaw pieces are arranged, and the two groups of second jaw pieces are symmetrically arranged about the center axis of the ocean current energy piezoelectric plate 4, one end of the seventh oil cylinder 20 is fixedly connected with the sixth oil cylinder 19, the second connecting rod 21 is vertically arranged with the seventh oil cylinder 20, and the second connecting rod 21 is fixedly connected with the movable end of the seventh oil cylinder 20, the connecting plate 22 is fixedly connected with the other end of the second connecting rod 21, the stopper 23 is detachably connected with the connecting plate 22, and the ocean current energy piezoelectric plate 24 is provided with a clamping groove matched with the stopper 23, and the stopper 23 is composed of two plate-shaped bodies with a certain included angle;In use, different angle stoppers 23 can be selected according to the flow rate of the ocean current and connected with the connecting plate 22, and after the stoppers 23 with different angles are connected with the ocean current energy piezoelectric plate 24, the ocean current energy piezoelectric plate 24 is at different inclination angles, thereby increasing the area or force of the ocean current acting on the ocean current energy piezoelectric plate 24.The wave energy piezoelectric plate 7 and the ocean current energy piezoelectric plate 24 are the same structure, and both are existing mature technology products containing piezoelectric materials.

[0047] When the ocean current energy piezoelectric assembly 4 is in a non-working state, such as extreme weather or no ocean waves, the sixth oil cylinder 19 is controlled to retract so that the second jaw piece and the ocean current energy piezoelectric plate 24 move to the inside of the bottom bin 17, and in extreme weather, the bottom bin 17 can provide a relatively stable environment for the second jaw piece and the ocean current energy piezoelectric plate 24, which is conducive to protecting the second jaw piece and the ocean current energy piezoelectric plate 24.When the ocean current energy piezoelectric assembly 4 needs to be used, the stoppers 23 with corresponding angles are installed on the connecting plate 22 according to the current flow rate of the ocean current, the ocean current energy piezoelectric plate 24 is adjusted to the corresponding inclination angle, the motor 18 is controlled to move the ocean current energy piezoelectric plate 24 to face the wave direction, the ocean current impacts the ocean current energy piezoelectric plate 24 to cause mechanical deformation, and the ocean current energy piezoelectric plate 24 converts mechanical energy into electrical energy.

[0048] Embodiment 2

[0049] The control method of the deep-sea platform energy self-supply device disclosed by the application comprises the following steps,

[0050] S1: obtaining real-time ocean working condition data by the detection equipment of the deep-sea platform;The ocean working condition data comprises the flow rate v of the ocean current and the wave amplitude γ.

[0051] S2: judging whether the marine working condition data belongs to a preset working condition, if yes, adjusting the wave energy piezoelectric assembly 3 and the sea current energy piezoelectric assembly 4 to a working state; if not, adjusting the wave energy piezoelectric assembly 3 and the sea current energy piezoelectric assembly 4 to a trimming state. The working condition is 0.05 m / s < v < 1.04 m / s and 0.1 m < γ < 1 m.

[0052] The wave energy piezoelectric assembly 3 is adjusted to the working state in the following manner:

[0053] According to the current wave direction, the electric sliding rail 5 is controlled to move the wave energy piezoelectric plate 7 to face the wave direction.

[0054] According to the current wave direction, the first clamping jaw part on the right side of the wave energy piezoelectric plate 7 is selected to be connected with the wave energy piezoelectric plate 7, and other first clamping jaw parts are released; the first clamping jaw part is released in the following manner: the power supply of the electromagnetic plate 15 is disconnected, the fifth oil cylinder 13 and the fourth oil cylinder 12 are controlled to be elongated to move the first connecting rod 14 away from the wave energy piezoelectric plate 7, until the connecting shaft 16 is separated from the wave energy piezoelectric plate 7; preferably, the fifth oil cylinder 13 and the fourth oil cylinder 12 of the first clamping jaw part separated from the wave energy piezoelectric plate 7 are controlled to rotate the corresponding electromagnetic plate 15 upward, until the electromagnetic plate 15 does not contact the sea surface, so that the electromagnetic plate 15 is prevented from being around the wave energy piezoelectric plate 7 to affect the wave impact on the wave energy piezoelectric plate 7. The first clamping jaw part on the right side of the wave energy piezoelectric plate 7 is selected to be connected with the wave energy piezoelectric plate 7 because it is found through experiments that the energy conversion efficiency is the highest when the wave energy piezoelectric plate 7 is fixed on the right side of the wave direction. The test results are shown in FIG. 11. The test method of the embodiment is as follows: the relationship between the fixing method of the piezoelectric plate and the piezoelectric efficiency is studied by a theoretical calculation method, the calculation domain is discretized by a finite volume method, the free surface is captured by a fluid volume method, and the fluid flow is controlled by RANS equations and continuity equations; in order to improve the calculation efficiency, as shown in FIG. 10, the size parameters of the calculation domain are as follows: length 20 m, width 10 m, height 3 m, water depth 2 m, wave energy plate size parameters: length 5 m, width 5 m, height 0.2 m, wave energy plate draft 0.1 m, and the calculation domain is symmetrical in the width direction. In the length direction of the calculation domain, the wave making port is 5 m away from the piezoelectric plate, and the wave absorbing section is 6 m long.

[0055] The power supply of the electromagnetic plate 15 of the first clamping jaw part connected with the wave energy piezoelectric plate 7 is disconnected, the wave energy piezoelectric plate 7 is rotated to be inclined toward the wave direction, and then the power supply of the electromagnetic plate 15 of the first clamping jaw part is connected to fix the wave energy piezoelectric plate 7 at the current position.

[0056] The first oil cylinder 8 and the second oil cylinder 9 are controlled to lower the wave energy piezoelectric plate 7 until the draft depth of the wave energy piezoelectric plate 7 is half of its height.

[0057] The way to adjust the wave energy piezoelectric assembly 3 to the trimming state is to control the first oil cylinder 8 and the second oil cylinder 9 to make the wave energy piezoelectric plate 7 linearly rise to the limit position, and then control the third oil cylinder 11 and the first oil cylinder 8 to make the wave energy piezoelectric plate 7 move to the limit position towards the working platform 1. Finally, the wave energy piezoelectric plate 7 is stored in the current position, which reduces the damage of extreme weather to the wave energy piezoelectric plate 7 and is beneficial to protect the wave energy piezoelectric plate 7.

[0058] The way to adjust the wave energy piezoelectric assembly 3 to the trimming state is to control the first oil cylinder 8 and the second oil cylinder 9 to make the wave energy piezoelectric plate 7 linearly rise to the limit position, and then control the third oil cylinder 11 and the first oil cylinder 8 to make the wave energy piezoelectric plate 7 move to the limit position towards the working platform 1. Finally, the wave energy piezoelectric plate 7 is stored in the current position, which reduces the damage of extreme weather to the wave energy piezoelectric plate 7 and is beneficial to protect the wave energy piezoelectric plate 7.

[0059] According to the current sea current speed, the stopper 23 with a corresponding angle is selected and installed on the connecting plate 22, and the sea current energy piezoelectric plate 24 is installed on the two groups of second jaw pieces through the stopper 23 and the clamping groove; when 0.05 m / s≤v≤0.4 m / s, the stopper 23 with an angle of 60° is selected; when 0.4 m / s≤v≤0.7 m / s, the stopper 23 with an angle of 45° is selected; when 0.7 m / s≤v≤1.04 m / s, the stopper 23 with an angle of 30° is selected;

[0060] According to the current wave direction, the motor 18 is controlled to make the sea current energy piezoelectric plate 24 move to face the wave direction;

[0061] The sixth oil cylinder 19 is controlled to make the sea current energy piezoelectric plate 24 move downward to the outside of the bottom warehouse 17.

[0062] The way to adjust the wave energy piezoelectric assembly 3 to the trimming state is to control the first oil cylinder 8 and the second oil cylinder 9 to make the wave energy piezoelectric plate 7 linearly rise to the limit position, and then control the third oil cylinder 11 and the first oil cylinder 8 to make the wave energy piezoelectric plate 7 move to the limit position towards the working platform 1. Finally, the wave energy piezoelectric plate 7 is stored in the current position, which reduces the damage of extreme weather to the wave energy piezoelectric plate 7 and is beneficial to protect the wave energy piezoelectric plate 7.

[0063] S3: When the wave energy piezoelectric assembly 3 and the sea current energy piezoelectric assembly 4 are in the working state, the wave impact on the wave energy piezoelectric plate 7 causes mechanical deformation, and the wave energy piezoelectric plate 7 converts mechanical energy into electrical energy; the sea current impact on the sea current energy piezoelectric plate 24 causes mechanical deformation, and the sea current energy piezoelectric plate 24 converts mechanical energy into electrical energy.

Claims

1. A deep-sea platform energy self-supply device, comprising a working platform (1) of a deep-sea platform, characterized in that: The floating platform (1) further comprises a floating barrel (2) installed at the bottom of the working platform (1), a wave energy piezoelectric assembly (3) arranged at the bottom of the working platform (1) and capable of consuming wave energy and converting the wave energy into electric energy, and a sea current energy piezoelectric assembly (4) arranged at the bottom of the floating barrel (2) and capable of consuming sea current energy and converting the sea current energy into electric energy; the wave energy piezoelectric assembly (3) comprises a motorized slide rail (5) installed at the bottom of the working platform (1) and surrounding the outer periphery of the floating barrel (2), a support connecting piece connected with the slide block of the motorized slide rail (5) and capable of being lifted and lowered, four groups of first clamping jaw pieces arranged in a rectangular array and installed on the support connecting piece, and wave energy piezoelectric plates (7) detachably connected with the first clamping jaw pieces and capable of rotating around the central axis at the connection position of the first clamping jaw pieces.

2. The deep sea platform energy self-supply device according to claim 1, characterized in that: The support connecting piece comprises a mounting plate (6) fixedly connected with the slide block of the motorized slide rail (5), a first oil cylinder (8) hingedly arranged at the bottom end of the mounting plate (6), a second oil cylinder (9) arranged directly below the first oil cylinder (8), and a non-damping double-headed oil cylinder (10) arranged between the first oil cylinder (8) and the second oil cylinder (9) and fixedly connected with the movable ends of the first oil cylinder (8) and the second oil cylinder (9) at both ends.

3. The deep sea platform energy self-supply device according to claim 2, characterized in that: The support connecting piece further comprises a third oil cylinder (11) arranged obliquely and hingedly connected with the mounting plate (6) and the movable end of the first oil cylinder (8) at both ends, and the third oil cylinder (11) is arranged on the side of the first oil cylinder (8) close to the floating barrel (2).

4. The apparatus according to claim 2, wherein: The first clamping jaw piece comprises a fourth oil cylinder (12) arranged obliquely and hingedly connected with the fixed end of the second oil cylinder (9) at one end, a fifth oil cylinder (13) hingedly connected with the movable end of the fourth oil cylinder (12), a first connecting rod (14) arranged perpendicularly with the fifth oil cylinder (13) and fixedly connected with the movable end of the fifth oil cylinder (13), an electromagnetic plate (15) fixedly connected with the other end of the first connecting rod (14), and a connecting shaft (16) fixedly connected with the electromagnetic plate (15), the connecting shaft (16) is movably inserted into the connecting hole arranged on the side of the wave energy piezoelectric plate (7), and the electromagnetic plate (15) is electromagnetically attached with the magnetic attraction piece fixedly arranged on the side of the wave energy piezoelectric plate (7).

5. The apparatus according to claim 1, wherein: The sea current energy piezoelectric assembly (4) comprises a bottom bin (17) fixedly connected with the bottom end of the floating barrel (2) and having an opening at the bottom, a motor (18) fixedly installed in the bottom bin (17), a sixth oil cylinder (19) connected with the output shaft of the motor (18) through a shaft coupling, two groups of second clamping jaw pieces symmetrically installed on the sixth oil cylinder (19), and a sea current energy piezoelectric plate (24) arranged between the two groups of second clamping jaw pieces and capable of being adjusted in angle.

6. The deep sea platform energy self-supply device according to claim 5, characterized in that: The second clamping jaw piece comprises a seventh oil cylinder (20) fixedly connected with the sixth oil cylinder (19) at one end, a second connecting rod (21) arranged perpendicularly with the seventh oil cylinder (20) and fixedly connected with the movable end of the seventh oil cylinder (20), a connecting plate (22) fixedly connected with the other end of the second connecting rod (21), and a limiting piece (23) detachably installed on the connecting plate (22) and inserted into the clamping groove arranged on the sea current energy piezoelectric plate (24).

7. A control method of the deep sea platform energy self-supply device according to any one of claims 1 to 6, characterized by: The method comprises the following steps, S1: obtaining real-time current ocean working condition data through detection equipment of deep sea platform; S2: judging whether the ocean working condition data belongs to preset working condition, if yes, adjusting the wave energy piezoelectric component (3) and the sea current energy piezoelectric component (4) to working state; if not, adjusting the wave energy piezoelectric component (3) and the sea current energy piezoelectric component (4) to trimming state; S3: when the wave energy piezoelectric component (3) and the sea current energy piezoelectric component (4) are in working state, the wave impact the wave energy piezoelectric plate (7) to make it mechanical deformation, the wave energy piezoelectric plate (7) converts mechanical energy into electrical energy; the sea current impact the sea current energy piezoelectric plate (24) to make it mechanical deformation, the sea current energy piezoelectric plate (24) converts mechanical energy into electrical energy.

8. The method of claim 7, wherein: The ocean working condition data in step S1 includes sea current velocity v and wave amplitude γ; the working condition in step S2 is 0.05m / s<v<1.04m / s and 0.1m<γ<1m.

9. The method of claim 7, wherein: The adjusting mode of the wave energy piezoelectric component (3) to working state in step S2 is as follows: According to the current wave direction, the electric sliding rail (5) is controlled to make the wave energy piezoelectric plate (7) move to face the wave direction; According to the current wave direction, the first jaw part on the right side of the wave energy piezoelectric plate (7) facing the wave direction is selected to be connected with the wave energy piezoelectric plate (7), and other first jaw parts are released; Wherein, the releasing mode of the first jaw part is to disconnect the power supply of the electromagnetic plate (15), control the fifth oil cylinder (13) and the fourth oil cylinder (12) to elongate to make the first connecting rod (14) move away from the wave energy piezoelectric plate (7) until the connecting shaft (16) is separated from the wave energy piezoelectric plate (7); Disconnecting the power supply of the electromagnetic plate (15) of the first jaw part connected with the wave energy piezoelectric plate (7), rotating the wave energy piezoelectric plate (7) to make it tilt towards the wave direction, and then connecting the power supply of the electromagnetic plate (15) of the first jaw part to fix the wave energy piezoelectric plate (7) at the current position; Controlling the first oil cylinder (8) and the second oil cylinder (9) to make the wave energy piezoelectric plate (7) descend until the draft depth of the wave energy piezoelectric plate (7) is half of its height; The adjusting mode of the wave energy piezoelectric component (3) to trimming state in step S2 is to control the first oil cylinder (8) and the second oil cylinder (9) to make the wave energy piezoelectric plate (7) linearly rise to the limit position, and then control the third oil cylinder (11) and the first oil cylinder (8) to make the wave energy piezoelectric plate (7) move to the limit position towards the working platform (1).

10. The method of claim 7, wherein the method further comprises: The adjusting mode of the sea current energy piezoelectric component (4) to working state in step S2 is as follows: According to the current sea current velocity, the limit stop (23) with corresponding angle is selected to be installed on the connecting plate (22), and the sea current energy piezoelectric plate (24) is installed on the two groups of second jaw parts through the limit stop (23) and the clamping groove; when 0.05m / s<v≤0.4m / s, the limit stop (23) with 60° is selected; when 0.4m / s<v≤0.7m / s, the limit stop (23) with 45° is selected; when 0.7m / s<v≤1.04m / s, the limit stop (23) with 30° is selected; According to the current wave direction, the motor (18) is controlled to move the ocean current energy piezoelectric plate (24) to face the wave direction; The sixth oil cylinder (19) is controlled to move the ocean current energy piezoelectric plate (24) to descend to the outside of the bottom warehouse (17); The adjustment of the ocean current energy piezoelectric assembly (4) to the trimming state in step S2 is that the sixth oil cylinder (19) is controlled to move the ocean current energy piezoelectric plate (24) to ascend to the inside of the bottom warehouse (17).

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