A marine oil spill recovery device

Abstract

A marine oil spill recovery device, relating to the field of open-water surface cleanup technology, is a semi-submersible device deployed on the sea surface. It includes a central recovery assembly, several peripheral oil collection and guiding components, and connecting arms. Multiple peripheral oil collection and guiding components are evenly distributed circumferentially around the central recovery assembly, with the connecting arms correspondingly connecting the two and allowing for operational spacing. The connecting arms have internal conveying channels connecting the central recovery assembly and the peripheral oil collection and guiding components. The peripheral oil collection and guiding components are equipped with a lifting mechanism capable of adsorbing and elevating oil. The central recovery assembly has an oil-water separation tank connected to an external suction pipeline. This invention employs a distributed oil collection structure, effectively expanding the oil collection coverage area and solving the defects of traditional single-point oil collection methods, such as oil slicks and missed collection. The lifting mechanism stably transports the oil-water mixture, and the oil-water separation tank enables centralized oil storage and continuous oil extraction, significantly improving the operational range, stability, and recovery efficiency of oil spill recovery under complex sea conditions.

Description

Technical Field

[0001] This invention relates to the field of open water surface cleanup technology, and more particularly to a marine oil spill recovery device. Background Technology

[0002] Emergency response to marine oil spills, port water slicks, spills in dock loading and unloading areas, and floating oil slicks on nearshore waters typically involves first creating a relatively concentrated oil slick area using oil booms or ship towing. Then, equipment such as floating skimmers, weir-type oil collectors, suction pumps, brush-type or disc-type recovery devices are used to collect the oil-water mixture and transport it to temporary storage containers. Existing floating recovery equipment generally includes a float, oil collection inlet, flow guiding structure, filter screen, oil-water lift pipeline, suction pump, and storage container. Its operation typically involves using a float to keep the oil collection inlet near the water surface, using water flow, towing speed, or pump suction to draw the floating oil into the inlet, and then filtering out floating debris before oil-water separation or direct transport.

[0003] Common weir-type or suction-type oil spill recovery devices mostly adopt a single-inlet or partial-inlet structure. The oil collection port is usually located on one side or in the center of the device, with only simple baffles or oil containment guides around it. In marine environments with large changes in waves, currents, and wind direction, the oil slick will drift in different directions. If the direction of the oil collection port or the draft cannot adapt to the position of the oil slick in time, problems such as oil overflow, leakage, or large amounts of seawater being sucked in can easily occur.

[0004] The problem with existing technologies is that the oil collection coverage area of ​​the device is small. Single-port or single-side oil collection structures can usually only effectively suck up floating oil in a local direction. When encountering oil film dispersion or wind and wave disturbance, floating oil is prone to flow around the outside of the equipment, resulting in unstable recovery efficiency. Summary of the Invention

[0005] The present invention aims to solve the problem that existing marine oil spill recovery devices have limited oil collection coverage and are prone to oil spill swirl and leakage when faced with wind, waves, and oil film dispersion and drift.

[0006] According to one aspect of the present invention, a marine oil spill recovery device is provided, which is semi-submersible and installed on the sea surface, including a central recovery assembly, a plurality of peripheral oil collection and guiding components, and a plurality of connecting arms; the plurality of peripheral oil collection and guiding components are evenly arranged circumferentially around the central recovery assembly; the plurality of connecting arms connect the peripheral oil collection and guiding components to the central recovery assembly in a one-to-one correspondence, so that the peripheral oil collection and guiding components and the central recovery assembly are kept at a distance; a conveying channel is provided inside the connecting arm, the conveying channel connecting the central recovery assembly and the peripheral oil collection and guiding components, the peripheral oil collection and guiding components including a lifting mechanism for adsorbing and lifting oil into the conveying channel; the central recovery assembly includes an oil-water separation tank, the oil-water separation tank being connected to an external suction pipeline.

[0007] As a preferred embodiment of the above technical solution, the peripheral oil collection and guiding assembly includes a floating support column and a lifting mechanism. The floating support column is vertically arranged and has an oil suction port at its lower end. The lifting mechanism is disposed inside the floating support column. The lifting mechanism includes a spiral blade and a drive motor. The drive motor is at least partially fixed inside the floating support column, and its output shaft is connected to the rotating shaft of the spiral blade. The rotation axis of the spiral blade coincides with the axis of the floating support column. The spiral blade is configured to drive the liquid to rotate through the viscous shear force between itself and the liquid and the inner wall of the floating support column when rotating, and convert the rotational motion into axial upward motion, thereby conveying the liquid at the oil suction port upward to the conveying channel.

[0008] As a preferred embodiment of the above technical solution, the peripheral oil collection and guiding assembly further includes an oil collection and guiding plate in the shape of a trumpet or a truncated cone. The oil collection and guiding plate is fixedly connected to the lower end of the float support and is arranged around the oil intake port. The opening of the oil collection and guiding plate faces downwards from the sea surface.

[0009] As a preferred embodiment of the above technical solution, the central recovery assembly further includes a filter cylinder located in the sea surface splash zone, with multiple rows of fluid passages opened on its cylinder wall, and the oil-water separation chamber disposed above the filter cylinder.

[0010] As a preferred embodiment of the above technical solution, a one-way valve is provided between the filter cylinder and the oil-water separation chamber; the one-way valve is directed from the filter cylinder to the oil-water separation chamber.

[0011] As a preferred embodiment of the above technical solution, a buoyancy adjustment component is provided below the filter cylinder; a counterweight base is provided below the buoyancy adjustment component; a battery and a control module are integrated inside the counterweight base; the buoyancy adjustment component is electrically connected to the control module; the buoyancy adjustment component includes at least one buoyancy chamber, an inflation unit, a drainage unit, and a draft sensor; the draft sensor is electrically connected to the control module; the inflation unit and the drainage unit are respectively connected to the buoyancy chamber and are both electrically connected to the control module.

[0012] As a preferred embodiment of the above technical solution, a drain outlet is provided at the bottom of the oil-water separation chamber; an electromagnetic drain valve is provided at the drain outlet; and the drain valve is electrically connected to the control module.

[0013] As a preferred embodiment of the above technical solution, the central recovery assembly further includes a central column; the central column is arranged vertically at the top of the central recovery assembly; and a lifting ring is provided at the top of the central column.

[0014] As a preferred embodiment of the above technical solution, a filter screen structure is provided at the oil intake port of the floating support.

[0015] As a preferred embodiment of the above technical solution, an oil-water interface sensor is installed inside the oil-water separation chamber; the oil-water interface sensor is electrically connected to the control module.

[0016] In summary, the present invention has the following advantages:

[0017] 1. This invention employs multiple sets of circumferentially evenly distributed peripheral oil collection and guiding components in conjunction with connecting arms to form a distributed oil collection structure. The reserved spacing of the connecting arms significantly expands the overall oil collection coverage of the device, enabling large-scale capture of floating oil on the sea surface. This effectively avoids the defects of floating oil swirl and leakage that are prone to occur in traditional single-point oil collection structures. At the same time, relying on the rising mechanism built into the peripheral oil collection and guiding components, the oil body on the sea surface is autonomously adsorbed and lifted for transport. The oil-water mixture collected over a large area can be stably transported to the central recovery assembly. In conjunction with the oil-water stratification tank connected to the external suction pipeline, centralized oil storage and continuous oil pumping operations are achieved, which greatly improves the coverage, operational stability and recovery efficiency of oil spill recovery under complex sea conditions.

[0018] 2. Furthermore, this invention, by setting a spiral lifting mechanism inside the outer peripheral oil collection and guiding assembly and matching it with a bottom oil collection and guiding plate, utilizes the liquid viscous shear force generated by the rotation of the spiral blades to achieve axial lifting and transportation of the oil-water mixture. Relying on the viscosity difference between oil and water media, a natural selective oil transportation effect is formed, which can preferentially lift high-viscosity spilled oil and intercept most of the seawater, achieving preliminary oil-water separation at the front end of the operation and effectively reducing the processing load of the central recovery assembly. At the same time, the rotation of the spiral blades can form a downward vortex, which, together with the trumpet-shaped guiding plate, stably entrains the surface floating oil film to the oil suction port position, solving the problems of poor transportation effect of heavy spilled oil, easy dispersion of oil film under wind and waves, and unstable oil suction in traditional equipment, significantly improving the recovery purity and transportation efficiency of heavy spilled oil.

[0019] 3. Furthermore, the present invention constructs an anti-backflow structure by setting a one-way valve between the filter cylinder and the oil-water separation chamber, and with the automatic drainage structure of the two-position two-way electromagnetic drain valve at the bottom of the oil-water separation chamber, it can effectively block the backflow and leakage of oil after the pumping operation stops. At the same time, it can automatically and accurately discharge the deposited water phase according to the water level in the chamber, so as to avoid water accumulation occupying the oil storage space and affecting the oil pumping efficiency.

[0020] 4. Furthermore, the multi-compartment independent buoyancy adjustment component and counterweight base structure at the bottom of the device of the present invention can dynamically adjust the overall buoyancy and draft according to the real-time load changes of the device, always ensuring that the oil collection port and filter cylinder are at the optimal operating water depth, while lowering the center of gravity of the device, greatly improving the environmental adaptability and automation level of the equipment.

[0021] Further or other beneficial effects will be discussed in the embodiments. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 for Figure 1 Enlarged view of area A in the image;

[0024] Figure 3 This is a three-dimensional partial sectional view of the overall structure of the present invention;

[0025] Figure 4 This is a partial sectional view of the main view of the present invention;

[0026] Figure 5 for Figure 4 Enlarged view of area B in the image;

[0027] Figure 6 This is a simplified schematic diagram of the floating adjustment component of the present invention;

[0028] Among them, 1-Central recovery assembly, 11-Oil-water separation chamber, 111-Drain outlet, 112-Electromagnetic drain valve, 113-Oil-water interface sensor, 12-Filter cylinder, 13-One-way valve, 14-Buoyancy adjustment component, 141-Buoyancy chamber, 142-Draft depth sensor, 143-Electric air pump, 144-Inlet solenoid valve, 145-Inlet solenoid valve, 146-Exhaust solenoid valve, 147-Air exchange pipe, 15-Counterweight base, 16-Central column, 161-Lifting ring, 162-Oil suction nozzle, 2-Connecting arm, 21-Conveying channel, 3-Outer peripheral oil collection and guiding component, 31-Floating support column, 32-Helical blade, 33-Drive motor, 34-Oil collection guide plate, 35-Filter screen structure. Detailed Implementation

[0029] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the construction shown in the accompanying drawings. The terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0030] The present invention will be further explained below with reference to the embodiments:

[0031] Example:

[0032] A marine oil spill recovery device, referring to Figure 1The device, in a semi-submersible configuration, is positioned on the sea surface and includes a central recovery assembly 1, several peripheral oil collection and guiding components 3, and several connecting arms 2. In this embodiment, there are three connecting arms 2 and three peripheral oil collection and guiding components 3. Its core design combines centralized central recovery with distributed peripheral oil collection. Multiple independent peripheral oil collection and guiding components 3 capture floating oil over a wider area, which is then transported to the central recovery assembly 1 via the connecting arms 2 for centralized processing. The three peripheral oil collection and guiding components 3 are evenly arranged circumferentially around the central recovery assembly 1. Each peripheral oil collection and guiding component 3 is connected to the central recovery assembly 1 via an independent connecting arm 2. The connecting arm 2 not only provides structural support, maintaining a predetermined distance between the peripheral oil collection and guiding components 3 and the central recovery assembly 1, thus significantly expanding the overall oil collection coverage of the device, but also has a through-channel 21 inside. The peripheral oil collection and guiding components 3 include a lifting mechanism for adsorbing and lifting oil into the conveying channel 21. One end of the conveying channel 21 is connected to the upper end of the peripheral oil collection and guiding component 3, and the other end is connected to the filter cylinder 12 of the central recovery assembly 1. It can smoothly transport the oil collected and lifted by the peripheral oil collection and guiding component 3 to the central recovery assembly 1 for subsequent processing. The connecting arm 2 is made of high-strength and corrosion-resistant materials, which can withstand the impact of sea waves and long-term erosion of seawater. At the same time, its structural strength is sufficient to support the weight of the peripheral oil collection and guiding component 3 and the dynamic load generated during operation, ensuring the structural stability of the device under complex sea conditions.

[0033] Reference Figure 3 and Figure 4 The outer peripheral oil collection and diversion assembly 3 includes a floating support column 31, a rising mechanism, and an oil collection and diversion plate 34. The rising mechanism adopts a spiral upward suction structure, which is specifically optimized for the transportation of marine oil spills, especially high-viscosity heavy oil spills. The floating support column 31 is vertically arranged and has a hollow receiving cavity inside to provide installation space for the rising mechanism. The lower end of the floating support column 31 has an oil suction port for sucking up oil-water mixtures near the sea surface, and the upper end is directly connected to the conveying channel 21 inside the connecting arm 2 to form a complete fluid transportation path. The rising mechanism includes a spiral blade 32 and a drive motor 33. The drive motor 33 is a small brushless motor, which is partially installed inside the floating support column 31. Its output shaft is coaxially connected to the rotating shaft of the spiral blade 32, so that the rotation axis of the spiral blade 32 is completely coincident with the axis of the floating support column 31.

[0034] When the drive motor 33 drives the helical blade 32 to rotate, viscous shear force is generated between the helical blade 32 and the liquid, and between the liquid and the inner wall of the float support 31. This viscous shear force causes the liquid inside the float support 31 to rotate along with the helical blade 32. The helix angle of the helical blade 32 itself converts the rotational motion of the liquid into axial upward motion, thereby continuously conveying the liquid at the oil suction port upward, and finally entering the conveying channel 21 of the connecting arm 2. Unlike traditional centrifugal pumps and propellers that rely on centrifugal force or mechanical thrust to convey liquid, this lifting mechanism... The transport efficiency is positively correlated with the viscosity of the liquid, a characteristic that perfectly matches the core requirements of marine oil spill recovery: due to the extremely low viscosity of seawater, its adhesion to the surface of the spiral blade 32 is very weak, and it is prone to slippage on the blade surface when the spiral blade 32 rotates, making it difficult to obtain sufficient axial lifting force. Therefore, most of the seawater will remain in the lower region of the floating support 31. On the other hand, the oil phase, especially high-viscosity heavy oil, has a stronger adhesion to the surface of the spiral blade 32, can rotate synchronously with the spiral blade 32 and obtain a larger axial lifting force, and is thus preferentially transported upward. This selective transport characteristic based on the difference in fluid viscosity gives this lifting mechanism a natural preliminary oil-water separation function. During the upward transport of the oil-water mixture, the oil phase is quickly lifted to the transport channel 21, while most of the water phase is trapped at the bottom and flows back into the seawater, significantly reducing the amount of water entering the central recovery assembly 1, significantly reducing the processing burden of the subsequent central separation unit, and improving the overall oil spill recovery efficiency and oil purity.

[0035] Meanwhile, the rotation of the spiral blades 32 not only drives the movement of the liquid inside the float support 31, but also drives the liquid outside the float support 31 to rotate through the transmission of viscous force, thereby forming a downward vortex centered on the float support 31. In order to make full use of this vortex effect, a funnel-shaped or truncated cone-shaped oil collecting guide plate 34 is fixedly connected to the lower end of the float support 31. The oil collecting guide plate 34 is arranged around the oil intake port, and its opening faces downwards from the sea surface, which can guide and constrain the vortex. The downward vortex will suck up the oil film that was originally floating on the water surface to a certain depth underwater, which is exactly aligned with the oil intake port at the lower end of the float support 31. The oil collecting guide plate 34 will further guide the sucked-up oil-water mixture to the central oil intake port to prevent it from spreading again.

[0036] In addition, a filter structure 35 is provided at the oil intake port of the float support 31. This filter structure 35 can intercept larger floating debris in the seawater, such as plastic bags, branches, foam, etc., to prevent these debris from entering the interior of the float support 31 and clogging the spiral blades 32 or subsequent conveying pipelines, thus ensuring that the device can operate continuously and stably for a long time.

[0037] Refer again Figure 1 or Figure 3 The central recovery assembly 1 mainly includes a filter cylinder 12, an oil-water separation chamber 11, a buoyancy adjustment component 14, a counterweight base 15, and a central column 16. It is responsible for the centralized filtration, separation, and storage of oil-water mixtures from the peripheral oil collection and guiding component 3 and the central area, and maintains a stable draft of the device through the buoyancy adjustment system. The filter cylinder 12 is located in the sea surface splash zone, and its cylinder wall has multiple rows of evenly distributed fluid through-holes. These fluid through-holes can be any combination of circular through-holes, square mesh holes, or grid holes, allowing the surrounding oil-water mixture to freely enter the cylinder from the outside and bottom of the filter cylinder 12, while also providing preliminary filtration to intercept larger floating objects. Specifically, in this embodiment, the conveying channel 21 is connected to the filter cylinder 12. Therefore, the filter cylinder 12 can not only collect floating oil in the central area but also receive oil from the conveying channel 21 of the connecting arm 2. All oil-water mixtures entering the filter cylinder 12 will initially mix inside the cylinder and flow upwards.

[0038] The oil-water separation chamber 11 is located above the filter cylinder 12 and is connected to the upper end of the filter cylinder 12, providing sufficient space for the oil-water mixture to remain and separate. After the oil-water mixture enters the oil-water separation chamber 11, due to the density difference between the oil phase and the water phase, the less dense oil phase will gradually float to the top of the oil-water separation chamber 11 and accumulate to form an oil-rich layer, while the more dense water phase will sink to the bottom of the oil-water separation chamber 11 and form a water layer. The upper part of the oil-water separation chamber 11 is connected to an external suction pipeline. When the external suction pump is working, it will remove the floating oil or oil-rich liquid in the upper part of the oil-water separation chamber 11 and transport it to a temporary oil storage container for further processing.

[0039] Reference Figure 5 A one-way valve 13 is installed between the filter cylinder 12 and the oil-water separation tank 11. The flow direction of the one-way valve 13 is from the filter cylinder 12 to the oil-water separation tank 11. Specifically, a simple and reliable one-way gravity ball valve can be used. The function of the one-way valve 13 is to prevent the liquid in the oil-water separation tank 11 from flowing back into the filter cylinder 12 and the seawater. When the external suction pump stops working, the pressure in the oil-water separation tank 11 will return to atmospheric pressure. At this time, the one-way valve 13 will automatically close under the action of gravity, blocking the communication path between the oil-water separation tank 11 and the filter cylinder 12, effectively preventing the collected oil from leaking back into the sea, and ensuring the continuity and reliability of the recovery work.

[0040] Reference Figure 2As the oil spill recovery operation continues, the water phase at the bottom of the oil-water separation tank 11 will continuously accumulate. When the water phase accumulates to a certain height, it will occupy a large amount of space inside the oil-water separation tank 11, affecting the collection and suction efficiency of the oil phase. To solve this problem, a drain outlet 111 is installed at the lowest position of the bottom of the oil-water separation tank 11, and an electromagnetic drain valve 112 is installed at the drain outlet 111. The electromagnetic drain valve 112 is electrically connected to the control module, and the control module controls its opening and closing state according to a preset program. When the water phase at the bottom of the oil-water separation tank 11 accumulates to a predetermined height, the control module will issue a command to open the electromagnetic drain valve 112, and the water phase at the bottom will be discharged through the drain outlet 111 under its own gravity. The monitoring of the predetermined height mentioned above is performed by an oil-water interface sensor 113 located inside the oil-water separation tank 11. The oil-water interface sensor 113 is electrically connected to the control module (the setting position of the oil-water interface sensor 113 can be found in the reference). Figure 4 The electromagnetic drain valve 112 is a two-position, two-way electromagnetic valve. Its working principle is as follows: When the electromagnetic drive coil is not energized, the valve core is tightly pressed against the valve seat under the elastic force of the internal return spring, completely blocking the fluid passage of the drain port 111 and ensuring that the liquid inside the oil-water separation chamber 11 will not leak through the drain port 111; when the control module outputs a control signal with rated voltage to the electromagnetic drive coil, the electromagnetic attraction generated by the coil overcomes the elastic force of the return spring, driving the valve core to move upward, so that the fluid passage inside the valve body is fully open, and the water phase at the bottom of the oil-water separation chamber 11 can be smoothly discharged into the external seawater through the drain port 111 under its own gravity; when the control module cuts off the power supply to the electromagnetic drive coil, the electromagnetic attraction disappears, and the valve core quickly falls back to the valve seat position under the action of the return spring, closing the drain passage again. The response time of the entire switching action is no more than several hundred milliseconds, which can realize precise start and stop control of the drainage process.

[0041] Below the filter cylinder 12 is a buoyancy adjustment component 14, and below the buoyancy adjustment component 14 is a counterweight base 15. The counterweight base 15 is located at the bottom of the entire device. It not only serves as a counterweight to lower the center of gravity of the device, improve the stability of the device on the sea surface, and prevent the device from capsizing, but also integrates a battery (not shown in the figure) and a control module (not shown in the figure). The battery provides power to all electrical components of the entire device, including the drive motor 33, the air filling unit, the drainage unit, various sensors, and solenoid valves, ensuring that the device can work independently for a long time without external power supply. The control module, as the control core of the device, is responsible for receiving detection signals from various sensors and issuing corresponding control commands according to the preset control logic, coordinating the work of various components, and realizing the fully automatic operation of the device.

[0042] Reference Figure 6The buoyancy adjustment component 14 is used to dynamically adjust the overall buoyancy according to the real-time weight changes during the operation of the device, so that the device can always be stably maintained at the preset draft depth, ensuring that the filter cylinder 12 in the splash zone and the oil intake of the outer oil collection and guiding component 3 are always in the optimal operating position, and ensuring the continuity and stability of oil collection and filtration operations. The buoyancy adjustment component 14 includes at least one buoyancy chamber 141, an inflation unit, a drainage unit, and a draft depth sensor 142. The draft depth sensor 142 is located in the lower part of the device and can accurately detect the actual draft of the device in real time, and transmit the collected detection electrical signal to the control module in real time, providing data for automatic buoyancy adjustment. The inflation unit and the drainage unit are respectively connected to the internal cavity of the buoyancy chamber 141, and are electrically connected to the control module as a whole, and are uniformly linked and controlled by the control module. Specifically, the inflation unit is equipped with a small electric air pump 143 and an air intake solenoid valve 144, and the drainage unit is equipped with a water intake solenoid valve 145. To address the issue of the inability to timely expel gas from the buoyancy chamber 141, this device is also equipped with an exhaust solenoid valve 146. Both the electric air pump 143 and the exhaust solenoid valve 146 are connected to a ventilation pipe 147, the air intake end of which extends above the sea surface, ensuring that the air pump and exhaust solenoid valve 146 can always exchange air with the atmosphere above the sea surface. This guarantees the stable and orderly operation of the inflation, deflation, and water intake / drainage of the buoyancy chamber 141.

[0043] When the device collects a large amount of oil and its overall weight increases, its draft will also increase. When the draft sensor 142 detects that the draft exceeds the predetermined value, it will send a signal to the control module. The control module will then open the air intake solenoid valve 144 and start the electric air pump 143 to fill the buoyancy chamber 141 with high-pressure air. Under the action of the high-pressure air, the seawater in the buoyancy chamber 141 will be discharged outside the chamber through the water intake solenoid valve 145. The overall buoyancy of the device will increase, and the draft will gradually decrease until it returns to the predetermined value. Then the control module will close the electric air pump 143 and all solenoid valves. Conversely, when the oil inside the device is pumped away by an external suction pump, the overall weight decreases, and the draft decreases accordingly. When the draft sensor 142 detects that the draft is lower than the predetermined value, the control module opens the inlet solenoid valve 145 and the vent solenoid valve 146. Seawater enters the buoyancy chamber 141 under the action of external water pressure, and at the same time, the air in the buoyancy chamber 141 is discharged through the vent solenoid valve 146. The overall buoyancy of the device decreases accordingly, and the draft gradually increases until it returns to the predetermined value. Then the control module closes all solenoid valves.

[0044] To further improve the reliability and stability of the buoyancy adjustment system, the buoyancy adjustment component 14 can adopt multiple independent buoyancy chambers 141. These buoyancy chambers 141 are evenly arranged circumferentially below the filter cylinder 12. Each buoyancy chamber 141 is equipped with an independent inflation unit and a drainage unit. This multi-chamber independent control design not only ensures that other buoyancy chambers 141 can still work normally when a single buoyancy chamber 141 is damaged, thus guaranteeing the basic buoyancy requirements of the device and improving the redundancy and reliability of the system, but also corrects the tilt of the device caused by uneven weight distribution or wind and waves by adjusting the buoyancy of buoyancy chambers 141 at different positions. This ensures that the device always maintains a horizontal attitude and that the oil inlets of all peripheral oil collection and guiding components 3 are at the same working depth, thus ensuring the consistency of the overall oil collection efficiency.

[0045] Reference Figure 1 and Figure 3 The central column 16 is vertically positioned at the top of the central recovery assembly 1, serving as the main load-bearing structure of the upper part of the device. Constructed entirely of high-strength steel, it can withstand various loads during hoisting, transportation, and offshore towing operations, exhibiting high overall structural strength and stability. A lifting ring 161 is integrally installed at the top of the central column 16, facilitating the overall hoisting, transportation, and offshore deployment and recovery operations of the device. The central column 16 has a through-hole oil-absorbing cavity that communicates with the interior of the oil-water separation tank 11 below. An oil-absorbing nozzle 162, connected to the oil-absorbing cavity, is mounted on the outer wall of the central column 16. External suction equipment can be connected via this nozzle 162 to extract the upper layer of oil-rich liquid accumulated in the oil-water separation tank 11 using negative pressure suction, thus completing the continuous recovery of spilled oil.

[0046] In this embodiment, to avoid confusion, the power supply cable structure is hidden. In addition, all cables in this embodiment are waterproof cables.

[0047] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A marine oil spill recovery device, arranged semi-submersible on the sea surface, characterized in that, The system includes a central recovery assembly (1), several peripheral oil collection and guiding components (3), and several connecting arms (2). The peripheral oil collection and guiding components (3) are evenly arranged circumferentially around the central recovery assembly (1). The connecting arms (2) are connected one-to-one between the peripheral oil collection and guiding components (3) and the central recovery assembly (1), so that the peripheral oil collection and guiding components (3) and the central recovery assembly (1) maintain a distance. The connecting arms (2) are provided with a conveying channel (21), which connects the central recovery assembly (1) and the peripheral oil collection and guiding components (3). The peripheral oil collection and guiding components (3) include a lifting mechanism for adsorbing and lifting oil into the conveying channel (21). The central recovery assembly (1) includes an oil-water separation chamber (11), which is connected to an external suction pipeline.

2. A marine oil spill recovery device according to claim 1, wherein, The peripheral oil collection and guiding assembly (3) includes a floating support column (31) and a lifting mechanism. The floating support column (31) is vertically arranged and has an oil suction port at its lower end. The lifting mechanism is located inside the floating support column (31). The lifting mechanism includes a spiral blade (32) and a drive motor (33). The drive motor (33) is at least partially fixed inside the floating support column (31), and its output shaft is connected to the rotating shaft of the spiral blade (32). The rotation axis of the spiral blade (32) coincides with the axis of the floating support column (31). The spiral blade (32) is configured to drive the liquid to rotate by the viscous shear force between the liquid and the inner wall of the floating support column (31) when rotating, and convert the rotational motion into axial upward motion, so as to transport the liquid at the oil suction port upward to the conveying channel (21).

3. A marine oil spill recovery device according to claim 2, wherein, The peripheral oil collection and diversion assembly (3) also includes an oil collection and diversion plate (34) in the shape of a trumpet or a truncated cone. The oil collection and diversion plate (34) is fixedly connected to the lower end of the float support (31) and arranged around the oil intake port. The opening of the oil collection and diversion plate (34) faces downward to the sea surface.

4. A marine oil spill recovery device according to claim 1, wherein, The central recovery assembly (1) also includes a filter cylinder (12), which is located in the sea surface splash zone and has multiple rows of fluid passages on its cylinder wall. The oil-water separation chamber (11) is located above the filter cylinder (12).

5. A marine oil spill recovery device according to claim 4, wherein, A one-way valve (13) is provided between the filter cylinder (12) and the oil-water separation chamber (11); the one-way valve (13) is directed to flow from the filter cylinder (12) to the oil-water separation chamber (11).

6. A marine oil spill recovery device according to claim 4, wherein, A buoyancy adjustment component is provided below the filter cylinder (12); a counterweight base (15) is provided below the buoyancy adjustment component; the counterweight base (15) integrates a battery and a control module; the buoyancy adjustment component is electrically connected to the control module; the buoyancy adjustment component includes at least one buoyancy chamber (141), an inflation unit, a drainage unit, and a draft sensor (142); the draft sensor (142) is electrically connected to the control module; the inflation unit and the drainage unit are respectively connected to the buoyancy chamber (141) and are both electrically connected to the control module.

7. A marine oil spill recovery device according to claim 6, characterized in that, The bottom of the oil-water separation chamber (11) is provided with a drain outlet (111); an electromagnetic drain valve (112) is provided at the drain outlet (111); the drain valve is electrically connected to the control module.

8. The marine oil spill recovery device according to claim 1, characterized in that, The central recovery assembly (1) also includes a central column (16); the central column (16) is arranged vertically at the top of the central recovery assembly (1); a lifting ring (161) is provided at the top of the central column (16).

9. A marine oil spill recovery device according to claim 2, characterized in that, A filter structure (35) is provided at the oil intake port of the floating support (31).

10. A marine oil spill recovery device according to claim 6, characterized in that, An oil-water interface sensor (113) is installed inside the oil-water separation chamber (11); the oil-water interface sensor (113) is electrically connected to the control module.

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