Semi-submersible ocean platform with wave power generation function

Abstract

The utility model relates to the technical field of semi-submersible type ocean platforms and wave energy power generation, and provides a semi-submersible type ocean platform with a wave energy power generation function, which comprises a semi-submersible type ocean platform, the semi-submersible type ocean platform is provided with a stand column, and the stand column is provided with a floating body which is in axial sliding fit with the stand column. A hydraulic cylinder assembly is connected between the floating body and the semi-submersible type ocean platform, an oil inlet and an oil outlet of the hydraulic cylinder assembly are arranged to be one oil port, and the oil ports are communicated with a hydraulic energy conversion system and a hydraulic oil tank through one-way hydraulic pipelines respectively. According to the utility model, clean wave energy is used for supplying power to the ocean platform, the environmental pollution caused by fossil energy supply of the ocean platform is reduced, and the energy utilization cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of semi-submersible marine platform and wave energy power generation technology, and provides a semi-submersible marine platform with wave energy power generation function. Background Technology

[0002] Offshore platforms are structures that are fixed or floating on the ocean surface, providing production and living facilities for activities such as drilling, oil production, cargo transportation, observation, navigation, and construction at sea. They are crucial facilities for offshore oil and gas resource exploration and development, and also an important support for the development of the marine economy. Based on their structural characteristics and operating status, they can be classified into fixed and floating types.

[0003] Fixed offshore platforms include gravity platforms, jacket platforms, and tension leg platforms; floating offshore platforms include semi-submersible platforms, tension leg platforms, and floating production storage and offloading vessels.

[0004] Semi-submersible offshore platforms, a type of floating platform, mainly consist of the following components: hull structure, pillars, pontoons, support system, deck structure, positioning system, propulsion system, drilling system, living quarters, and safety system. The hull structure typically includes multiple pillars and pontoons, which together provide buoyancy and stability. The support system connects the hull structure and deck, ensuring the platform's stability at sea. The deck structure provides the work and living quarters, equipped with necessary equipment and facilities. The positioning system maintains the platform's stability in its designated position. The propulsion system provides the energy required for platform operation. The drilling system is used for offshore oil and gas exploration and development. The living quarters provide accommodation and living support for personnel. The safety system ensures the platform's safety in severe weather and emergencies.

[0005] Semi-submersible platforms, characterized by good stability, typically consist of multiple pontoons and connecting structures. Their main features include: Good stability: Due to their low center of gravity and uniform buoyancy distribution, semi-submersible platforms maintain high stability even in harsh sea conditions, reducing tilting and rolling; High adaptability: Semi-submersible platforms can be used in different water depths and marine environments, offering strong adaptability and the ability to carry various marine equipment, enabling the continuous development of marine platforms into deeper waters; Simple construction and maintenance: Compared to fixed platforms, the construction and maintenance costs of semi-submersible platforms are lower; Minimal environmental impact: The design of semi-submersible platforms minimizes their impact on the marine ecosystem, contributing to the protection of marine biodiversity.

[0006] Meanwhile, in the deep sea, marine renewable energy resources, represented by wave energy, are very abundant. The development and utilization of wave energy provides the possibility for marine energy supply. Wave energy is clean and renewable, and it also has the advantage of high energy density compared to other renewable energy sources. Large-scale development and utilization of wave energy only requires the use of a vast sea area, without occupying valuable land area. In addition, the utilization of wave energy will not cause ecological and environmental problems.

[0007] The traditional way to power offshore platforms is through diesel generators. This method of power supply is not only costly in terms of energy transportation, but also causes serious pollution to the marine environment due to the combustion of fossil fuels such as diesel.

[0008] Wave energy generation technology is becoming increasingly mature. If wave energy generation technology can be combined with marine platforms to provide energy for marine platforms and realize in-situ energy supply for marine platforms, it will greatly alleviate the energy problem of marine platforms.

[0009] Chinese utility model patent with publication number CN115498687A discloses a multi-energy complementary power supply system and operation method for a semi-submersible marine platform. By integrating multiple renewable energy sources and coupling wave power generation system, wind power generation system, and solar photovoltaic power generation system, it can fully and efficiently utilize marine energy within a limited space. It rationally configures the bus voltage, controls the number of power conversions and efficiency within the system, reduces system losses while meeting the system's power supply requirements, and realizes the function of AC to DC power transmission or DC to AC power transmission on a semi-submersible marine platform.

[0010] The above scheme uses an energy storage system to store and recover excess power generated by the wave energy power generation system, the combined vertical axis wind turbine power generation system, and the flexible solar photovoltaic power generation system, achieving energy storage management with a capacity of over 100 kWh. By integrating and utilizing multiple renewable energy sources at sea through new energy power generation technologies, it improves resource utilization and ensures the reliability of power supply. However, the scheme has a complex design structure, low energy conversion efficiency, and increases the failure rate of offshore platforms. Summary of the Invention

[0011] The purpose of this invention is to address the shortcomings of existing technologies by proposing a semi-submersible marine platform with wave energy generation capabilities, overcoming the following deficiencies of combining semi-submersible marine platforms with wave energy generation: 1. Low wave energy conversion efficiency; 2. Poor corrosion resistance and fatigue resistance.

[0012] To achieve the above objectives, the present invention adopts the following technical solution: a semi-submersible marine platform with wave energy generation function, comprising a semi-submersible marine platform, wherein the semi-submersible marine platform is provided with a column, and a float with axial sliding fit is provided on the column. A hydraulic cylinder assembly is connected between the float and the semi-submersible marine platform. The oil inlet and oil outlet of the hydraulic cylinder assembly are set as one oil port, and the oil port is connected to a hydraulic energy conversion system and a hydraulic oil tank respectively through a one-way hydraulic pipeline.

[0013] Furthermore, the column is cylindrical, and the float is annular.

[0014] Furthermore, a guide rail assembly is provided between the float and the column.

[0015] Furthermore, the guide rail assembly consists of two sets, symmetrically arranged on both sides of the column.

[0016] Furthermore, the guide rail assembly includes a slidingly fitted track and a groove, the track being axially fixed to the outer surface of the column, and the groove being formed in the float.

[0017] Furthermore, the one-way hydraulic pipeline includes a first one-way valve and a second one-way valve; the first one-way valve is disposed between the hydraulic energy conversion system and the oil port, and conducts in the direction of the hydraulic energy conversion system; the second one-way valve is disposed between the hydraulic oil tank and the oil port, and conducts in the direction of the oil port.

[0018] Furthermore, a shut-off valve is also provided between the oil port and the first check valve.

[0019] Furthermore, a hydraulic bypass is provided between the oil port and the hydraulic oil tank, and a hydraulic oil pump is provided on the bypass.

[0020] Furthermore, the column is equipped with anti-collision blocks to limit the upper and lower limit positions of the buoy.

[0021] Furthermore, the hydraulic energy conversion system is a hydraulic energy storage power generation system.

[0022] The beneficial effects of this utility model are as follows: (1) By combining the wave energy power generation system with the semi-submersible marine platform, using the semi-submersible marine platform as the base, and adding the wave-absorbing float and hydraulic energy conversion system, it is possible to use clean wave energy to power the marine platform, reduce the environmental pollution caused by the use of fossil energy for the marine platform, and save energy utilization costs.

[0023] (2) Since wave energy absorbing floats can absorb wave energy, they reduce the load of waves on the marine platform, which is beneficial to improving the service life of the marine platform structure.

[0024] (3) In severe working conditions such as typhoons, the hydraulic energy conversion system and the ballast system of the offshore platform can be used to protect the wave-absorbing float, which improves the reliability of the wave energy power generation system. Attached Figure Description

[0025] Figure 1 This is the front view of this utility model; Figure 2 This is a side view of the present invention; Figure 3 This is a top view of the track system of this utility model; Figure 4 This is a schematic diagram of the upward movement of the wave-absorbing buoy of this utility model; Figure 5 This is a schematic diagram of the downward movement of the wave-absorbing buoy of this utility model; Figure 6 This is a schematic diagram of the wave-absorbing buoy of this utility model moving downwards to its extreme position; Figure 7 This is a schematic diagram of the wave-absorbing buoy of this utility model moving upward to its limit; Figure 8 This is a schematic diagram of the typhoon-resistant state of this utility model; Figure 9 This is a hydraulic cylinder oil circuit connection diagram of this utility model; in the diagram: 1-top platform; 2-bottom deck; 3-circular column; 4-track; 5-upper limit anti-collision block; 6-lower limit anti-collision block; 7-circular wave-absorbing float; 8-slide groove; 9-left hydraulic cylinder; 10-right hydraulic cylinder; 11-left hydraulic cylinder piston rod; 12-right hydraulic cylinder piston rod; 13-left hydraulic cylinder barrel; 14-right hydraulic cylinder barrel; 15-first shut-off valve; 16-second shut-off valve; 17-first check valve; 18-third check valve; 19-second check valve; 20-fourth check valve; 21-hydraulic oil pump; 22-oil tank. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] Example 1

[0028] A semi-submersible marine platform with wave energy generation capability mainly consists of the following parts: a semi-submersible marine platform body, a circular wave-absorbing float 7, an orbital system 4, and a hydraulic energy conversion system. This platform is designed to fully utilize the wave energy in the ocean and convert it into electrical energy.

[0029] The structure of a semi-submersible offshore platform includes a top production and living platform, four symmetrically distributed circular columns, and a bottom deck. These components together form the platform's basic framework, ensuring its stability and functionality in the ocean.

[0030] Two tracks 4 are symmetrically arranged on both sides of each circular column 3. These tracks 4 provide the necessary guidance and support for the vertical movement of the circular wave-absorbing float 7. The circular wave-absorbing float 7 is nested on the circular column 3, and its inner ring is designed with grooves 8. These grooves 8 tightly engage with the tracks 4 on the circular column 3, together forming the track 4 system. In this way, the circular wave-absorbing float 7 can move up and down along the circular column 3 under the guidance of the tracks 4, effectively capturing and utilizing wave energy.

[0031] To achieve energy conversion, hydraulic cylinders are installed between the circular radar-absorbing float 7 and the production and living platform on top of the offshore platform. The piston rods of these hydraulic cylinders are fixed to the underside of the top production and living platform, while the cylinder barrels are mounted on the circular radar-absorbing float 7. Two hydraulic cylinders are symmetrically arranged on both sides of each circular radar-absorbing float 7 to ensure the stability and reliability of its movement.

[0032] To prevent the circular radar-absorbing float 7 from exceeding its predetermined stroke range during vertical movement, upper limit anti-collision blocks 5 and lower limit anti-collision blocks 6 are symmetrically installed on the circular column 3. These anti-collision blocks ensure the safety of the radar-absorbing float during movement and prevent it from exceeding the stroke limits of the hydraulic cylinder.

[0033] Taking a circular wave-absorbing float 7 as an example, a left hydraulic cylinder and a right hydraulic cylinder are installed on its two sides respectively. The rodless chambers of both the left and right hydraulic cylinders are connected to the hydraulic oil tank 22. The rod chamber of the left hydraulic cylinder is divided into three paths: the first path connects to the first shut-off valve 15, which in turn connects to the first check valve 17; the second path directly connects to the second check valve 19; and the third path connects to the outlet of the hydraulic pump 21. The rod chamber of the right hydraulic cylinder is divided into two paths: the first path connects to the second shut-off valve 16, which in turn connects to the third check valve 18; the second path directly connects to the fourth check valve 20; and the third path also connects to the outlet of the hydraulic pump 21. The inlet of the hydraulic pump 21 is connected to the hydraulic oil tank 22.

[0034] The second check valve 19 and the fourth check valve 20 are connected to the hydraulic oil tank 22 to ensure smooth return flow in the hydraulic system. The first check valve 17 and the third check valve 18 are connected to the hydraulic energy storage and power generation system, converting hydraulic energy into electrical energy, thereby achieving effective utilization of wave energy. Through this design, the semi-submersible offshore platform can not only float stably on the sea surface but also efficiently capture wave energy and convert it into electrical energy to power the platform's operation and provide energy support for other offshore facilities.

[0035] This embodiment integrates a wave energy power generation system on a semi-submersible marine platform, using wave energy to generate electricity for the platform, thus realizing the supply of renewable and clean energy for the marine platform.

[0036] Example 2

[0037] like Figures 1 to 5 As shown, a semi-submersible marine platform with wave energy generation function includes a semi-submersible marine platform, a circular wave-absorbing float 7, an orbital system 4, a hydraulic energy conversion system, etc.

[0038] Semi-submersible offshore platforms mainly include a top platform 1, a bottom deck 2, and circular columns 3, similar to traditional semi-submersible offshore platforms.

[0039] This patent incorporates a circular wave-absorbing float 7 nested within the circular column 3 of a traditional semi-submersible platform to capture wave energy. During normal operation, the circular wave-absorbing float 7 floats on the water surface.

[0040] In order to enable the circular wave-absorbing float 7 to move up and down along the circular column 3 under the action of waves, a track system 4 is set up. The track system 4 includes a track 4 and a chute 8. The track 4 is symmetrically arranged on the circular column 3, and the chute 8 is arranged on the inner ring of the circular wave-absorbing float 7. The chute 8 is engaged with the track 4.

[0041] A hydraulic cylinder is installed between the top platform 1 and the circular wave-absorbing float 7. Taking one of the circular wave-absorbing floats 7 as an example, a left hydraulic cylinder is set on the left side of the circular wave-absorbing float 7 and a right hydraulic cylinder is set on the right side. The piston rod ends of the left and right hydraulic cylinders are connected to the top platform 1, and the cylinder barrel ends are connected to the circular wave-absorbing float 7. Driven by the waves, the semi-submersible platform has a large volume and mass and a small motion response, while the circular wave-absorbing float 7 is relatively small compared to the semi-submersible platform and has a relatively large operating response under the drive of the waves. Therefore, the semi-submersible platform will generate relative motion with the circular wave-absorbing float 7, thereby driving the hydraulic cylinder to move.

[0042] When the wave energy power generation system is in normal working condition, the first shut-off valve 15 and the second shut-off valve 16 are opened. When the wave-driven buoy moves upward relative to the semi-submersible platform, the cylinder barrel of the hydraulic cylinder connected to the wave-absorbing buoy will also move upward synchronously. The rod chamber of the left hydraulic cylinder will draw oil from the hydraulic oil tank 22 through the second check valve 19, and the rod chamber of the right hydraulic cylinder will draw oil from the hydraulic oil tank 22 through the fourth check valve 20.

[0043] When the wave-driven buoy moves downward relative to the semi-submersible platform, the cylinder barrel of the hydraulic cylinder connected to the wave-driven buoy will also move downward synchronously. The hydraulic oil in the rod chamber of the left hydraulic cylinder will enter the hydraulic energy conversion system through the first shut-off valve 15 and the first check valve 17 for energy storage and voltage stabilization power generation; the hydraulic oil in the rod chamber of the right hydraulic cylinder will enter the hydraulic energy conversion system through the second shut-off valve 16 and the third check valve 18 for energy storage and voltage stabilization power generation.

[0044] In the above process, driven by waves, the up-and-down movement of the wave-absorbing float relative to the semi-submersible platform completes the oil suction and discharge actions of the hydraulic cylinder, converting the wave energy captured by the wave-absorbing float into hydraulic energy, and finally carrying out the energy storage and voltage stabilization power generation process through the hydraulic energy conversion system.

[0045] When the waves are large, the vertical movement of the wave-absorbing float relative to the semi-submersible platform is also large. In order to prevent the relative movement between the wave-absorbing float and the semi-submersible platform from exceeding the stroke limit of the hydraulic cylinder and causing damage to the hydraulic cylinder, upper limit anti-collision block 5 and lower limit anti-collision block 6 are respectively installed on the circular column 3.

[0046] When the platform encounters severe conditions such as typhoons, the entire semi-submersible offshore platform will enter typhoon protection mode, at which point the wave energy power generation system will cease operation. First, the first shut-off valve 15 and the second shut-off valve 16 are closed. Then, the hydraulic oil pump 21 is started. After starting, the hydraulic oil pump 21 will draw oil from the hydraulic oil tank 22 and pump high-pressure hydraulic oil into the rod chambers of the left and right hydraulic cylinders. As the high-pressure hydraulic oil is pumped in, the circular wave-absorbing float 7 will gradually rise. When it rises to the upper limit anti-collision block 5, the hydraulic oil pump 21 is shut off, and the circular wave-absorbing float 7 will be at its highest position and maintained there. Finally, the semi-submersible platform's own ballast system will raise the platform to a certain height, ensuring the circular wave-absorbing float 7 is at a certain height above the horizontal plane, preventing it from being hit by waves and thus protecting the wave energy power generation system.

[0047] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A semi-submersible marine platform with wave energy generation capability, comprising a semi-submersible marine platform, wherein the semi-submersible marine platform is equipped with columns, characterized in that, The column is equipped with an axially sliding float. A hydraulic cylinder assembly is connected between the float and the semi-submersible offshore platform. The oil inlet and outlet of the hydraulic cylinder assembly are set as one oil port. The oil port is connected to the hydraulic energy conversion system and the hydraulic oil tank through a one-way hydraulic pipeline.

2. A semi-submersible offshore platform with wave energy generation function according to claim 1, characterized in that, The column is cylindrical, and the float is annular.

3. A semi-submersible marine platform with wave energy generation function according to claim 2, characterized in that, A guide rail assembly is provided between the float and the column.

4. A semi-submersible offshore platform with wave energy generation function according to claim 3, characterized in that, The guide rail assembly consists of two sets, symmetrically arranged on both sides of the column.

5. A semi-submersible offshore platform with wave energy generation function according to claim 4, characterized in that, The guide rail assembly includes a slidingly fitted track and a groove. The track is axially fixed to the outer surface of the column, and the groove is formed in the float.

6. A semi-submersible offshore platform with wave energy generation function according to claim 5, characterized in that, The one-way hydraulic pipeline includes a first one-way valve and a second one-way valve; the first one-way valve is located between the hydraulic energy conversion system and the oil port, and is open to the hydraulic energy conversion system; the second one-way valve is located between the hydraulic oil tank and the oil port, and is open to the oil port.

7. A semi-submersible offshore platform with wave energy generation function according to claim 6, characterized in that, A shut-off valve is also provided between the oil port and the first check valve.

8. A semi-submersible offshore platform with wave energy generation function according to claim 7, characterized in that, A hydraulic bypass is provided between the oil port and the hydraulic oil tank, and a hydraulic oil pump is provided on the bypass.

9. A semi-submersible offshore platform with wave energy generation function according to any one of claims 1-7, characterized in that, The column is equipped with anti-collision blocks to limit the upper and lower extreme positions of the buoy.

10. A semi-submersible offshore platform with wave energy generation function according to any one of claims 1-7, characterized in that, The hydraulic energy conversion system is a hydraulic energy storage power generation system.

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