Easily-released floating type offshore hydrogen-based energy production platform and working method thereof

Abstract

The invention discloses a floating type offshore hydrogen-based energy production platform easy to release and a working method thereof, and relates to the field of offshore new energy development. The production platform comprises a platform body, a floating body foundation, a mooring system, a quick plugging device and a dynamic cable. The mooring system comprises at least one mooring assembly, and the quick plugging device is installed between the platform body and the dynamic cable. An auxiliary propeller is installed on one side wall of the floating body foundation and used for moving and adjusting when the platform is positioned and released. The multiple mooring assemblies are connected with a releasing device through anchor chains to achieve disconnection of anchoring positions, the production platform can be withdrawn out of an anchoring area, and platform damage caused by anchor chain breakage in extreme stormy wave environments such as typhoons is avoided. Electrical connection between the dynamic cable and the offshore wind power plant is cut off through the quick plugging device, and the cable is cut off in a non-destructive manner, so that repeated deployment cost caused by traditional cutting is avoided; after release, the production platform can be repositioned through the tug, anchor chains and cables do not need to be cut and relaid, and operation and maintenance are convenient.

Description

Technical Field

[0001] This invention relates to the field of marine new energy development, specifically to an easily detachable floating marine hydrogen-based energy production platform and its operating method. Background Technology

[0002] In recent years, the installed capacity of offshore wind power in coastal areas has continued to grow, but the curtailment rate has also increased, exposing problems such as low utilization efficiency and weak risk resistance in the single-resource development model. To overcome these bottlenecks, offshore hydrogen-based energy production platforms, by integrating wind power, hydrogen production, and chemical synthesis technologies, construct a complete "resource development-conversion-utilization" chain, becoming a new direction for promoting the low-carbon development of the marine economy. Many related technologies combine wind power, tidal energy, and hydrogen production to form an integrated platform, employing multi-buoy foundations to support the electrolysis hydrogen production system and utilizing subsea hydrogen storage stations for energy storage.

[0003] However, significant shortcomings exist in the relevant technologies: the platform lacks a rapid escape mechanism to cope with extreme winds and waves such as typhoons, making it susceptible to equipment damage during disasters and lacking protection against extreme environments; the platform's internal devices require regular maintenance, but most solutions are designed with anchor chains and cable systems that are difficult to reuse, requiring destructive cutting for maintenance, resulting in high redeployment costs, long cycles, and insufficient maintenance feasibility. In particular, the rigid connection between the mooring system and the dynamic cable makes it impossible for the platform to be safely evacuated during typhoon avoidance or maintenance, severely restricting its large-scale application.

[0004] Therefore, there is an urgent need to develop a floating platform with rapid release and reset capabilities to improve safety and reduce operation and maintenance costs. Summary of the Invention

[0005] In view of this, the present invention provides an easily detachable floating marine hydrogen-based energy production platform and its operating method to solve the problems mentioned in the background art.

[0006] In a first aspect, the present invention provides an easily detachable floating offshore hydrogen-based energy production platform, comprising:

[0007] The platform body and the floating body foundation are anchored to the seabed by a mooring system. The mooring system includes at least one mooring component, which includes an upper mooring cable, an anchor chain connection and release device, and a lower anchor chain connected in series. The upper mooring cable is fixedly connected to the floating body foundation, and the lower anchor chain is adapted to be fixed to the seabed.

[0008] A quick-plug device and a dynamic cable are provided. The quick-plug device is installed between the platform body and the dynamic cable. The platform body is connected to the offshore wind farm through the dynamic cable.

[0009] An auxiliary thruster is installed on one side wall of the floating body foundation for positioning and movement adjustment during platform release.

[0010] Beneficial effects: The production platform specifically includes the platform body, floating foundation, mooring system, quick-connect device, dynamic cable and auxiliary thruster; the floating foundation provides buoyancy environment and installation foundation for the platform body; the mooring components are connected in three sections in series through the upper mooring cable, anchor chain connection and release device and lower anchor chain; the dynamic cable is equipped with a quick-connect device between it and the offshore wind farm; and the floating foundation sidewall is equipped with auxiliary thruster. In this solution, multiple mooring components employ anchor chain disconnection devices to disconnect the anchored positions, allowing the production platform to be withdrawn from the anchored area. This prevents platform damage caused by anchor chain breakage in extreme wind and wave environments such as typhoons. A quick-release device disconnects the electrical connection between the dynamic cable and the offshore wind farm, employing a non-destructive cable disconnection method to avoid the repeated deployment costs associated with traditional cutting. After disconnection, the production platform can be repositioned by tugboats without the need for cutting and re-laying anchor chains and cables, simplifying maintenance. During the disconnection phase, an auxiliary thruster provides thrust to counteract residual mooring tension, slackening the mooring and facilitating the separation of the upper mooring cable and lower anchor chain, thus enhancing safety. The auxiliary thruster also allows for precise adjustment of the platform's position, ensuring anchor chain slack during disconnection and rapid repositioning during repositioning, reducing reliance on external tugboats.

[0011] In some embodiments, the anchor chain connection release device includes:

[0012] The buoy module adjusts buoyancy by buoyant water intake and drainage to adjust the position of the lower anchor chain.

[0013] The hydraulic buckle module has a first snap-fit ​​end connected to the upper mooring cable and a second snap-fit ​​end connected to the lower anchor chain, with the first snap-fit ​​end and the second snap-fit ​​end being snap-fitted together.

[0014] The control system is adapted to remotely control the connection locking and unlocking between the first locking end and the second locking end of the hydraulic buckle module.

[0015] Beneficial effects: The anchor chain connection release device consists of a float module, a hydraulic buckle module, and a control system.

[0016] The buoy module actively unloads the load and adjusts buoyancy by water intake and drainage, allowing the lower section of the anchor chain to be released from tension, facilitating release and avoiding impact loads on the hydraulic buckle module, thus improving unlocking reliability. The control system allows for remote operation, enabling users to trigger the release wirelessly from the control room or tugboat without the need for underwater operations by divers, facilitating release even in extreme sea conditions. The hydraulic buckle module can be repeatedly locked and unlocked, offering good reusability.

[0017] In some embodiments, the anchor chain connection release device further includes an adapter module, one end of which is fixedly connected to the float module and the other end of which is fixedly connected to the hydraulic buckle module.

[0018] Beneficial effects: This solution adds an adapter module to securely connect the pontoon module and the hydraulic latch module. The adapter module acts as a rigid transition section, evenly transferring the buoyancy of the pontoon to the hydraulic latch, avoiding structural fatigue caused by stress concentration and extending the overall structural lifespan. When the hydraulic latch requires maintenance, the adapter module can be disassembled without disassembling the entire pontoon module, thus improving operational efficiency.

[0019] In some embodiments, the quick-plug device includes:

[0020] The socket assembly is fixedly installed on the floating offshore platform;

[0021] A plug assembly is fixedly installed at the end of the dynamic cable and is adapted to be sealed and disconnected from the socket assembly;

[0022] The socket assembly includes a socket housing, a socket base, multiple electrical pins, and a socket oil bladder. The socket base is fixedly disposed within the socket housing and has multiple through holes. The electrical pins are correspondingly fixedly disposed within the through holes, and the outer diameter of the electrical pins is larger than the diameter of the through holes to achieve an interference fit. The socket oil bladder is embedded in the socket base, and the internal cavity of the socket housing is filled with insulating oil.

[0023] The plug assembly includes a plug housing, a plug base, multiple sockets, and a plug oil bladder; the plug base is fixedly disposed inside the plug housing, the sockets are fixedly disposed inside the plug base, and the sockets are configured to correspond one-to-one with the electrical pins of the socket assembly; the plug oil bladder is disposed inside the plug housing, and the internal cavity of the plug housing is filled with insulating oil.

[0024] When the plug assembly is mated with the socket assembly, the electrical pin is inserted into the corresponding socket to achieve electrical connection, and the entire electrical connection portion after mating is immersed in insulating oil.

[0025] Beneficial effects: The interference fit between the electrical pin and the socket base through hole ensures that the electrical pin does not loosen under dynamic conditions such as platform shaking and water flow impact through mechanical pre-tightening force, avoiding power outages or signal interruptions caused by poor contact and ensuring the continuity of power transmission. The internal cavities of both the socket and plug assemblies are filled with insulating oil, and the entire electrical connection is immersed in insulating oil after docking. The insulating oil can not only isolate the electrical pin and socket from corrosive media such as seawater and moisture, but also reduce the risk of short circuits through the high insulation properties of the oil medium, adapting to the extreme environment of high humidity and high salt spray at sea. By embedding the socket oil bladder and plug oil bladder into the base or shell, the elastic deformation of the oil bladder is used to compensate for the small gaps during docking, and the fluidity of the insulating oil achieves dynamic sealing, ensuring that the insulating oil is not prone to leakage during insertion and removal. The oil bladder can compensate for the expansion or contraction of the insulating oil volume due to temperature or depth changes, always maintaining an internal pressure slightly higher than the external water pressure, thereby effectively preventing seawater from seeping in, ensuring the long-term effectiveness of the seal, and effectively preventing external seawater from entering the electrical connection area, providing a stable sealing foundation for rapid separation and docking.

[0026] In some embodiments, the receptacle assembly further includes a receptacle sealing kit disposed at a port of the receptacle housing for forming a seal with the plug housing during mating;

[0027] The plug assembly also includes a plug sealing kit disposed at the port of the plug housing for forming a seal with the socket housing during mating.

[0028] Beneficial Effects: The socket sealing kit and plug sealing kit are respectively installed at the ports of the socket housing and plug housing, forming a seal at the port during mating. In addition to the insulating oil seal in the electrical connection area, this further prevents external seawater, silt, and other impurities from intruding through the mating gaps, avoiding contamination or dilution of the insulating oil and strengthening the sealing design. The double seal of the port sealing kit and internal insulating oil ensures the stability of the insulating oil environment, effectively reducing leakage caused by external pressure fluctuations or insertion / removal operations, maintaining the fullness of the insulating oil in the electrical connection area, ensuring that the insulation performance does not degrade during long-term use, and extending the equipment's service life. Furthermore, under extreme wind and wave conditions such as typhoons and giant waves, the relative displacement between the platform and the dynamic cable may increase. The sealing kit can compensate for minor misalignments at the mating surface through elastic deformation, preventing seal failure and ensuring the sealing performance of the insertion / removal device under dynamic operating conditions.

[0029] In some embodiments, the plug assembly further includes a removably disposed sealing cap adapted to seal onto the plug sealing kit after the plug assembly is separated from the socket assembly.

[0030] Beneficial effects: When the plug assembly and socket assembly are separated, such as during platform relocation or maintenance, the sealing cap can quickly cover the plug sealing kit, forming a physical barrier to prevent the plug sealing kit from being directly exposed to the seawater environment. This prevents seawater, marine organisms, silt, and other impurities from adhering to or invading the plug's internal socket and insulating oil cavity, avoiding contaminants that could lead to sealing failure or electrical connection faults during subsequent docking. The sealing cap also reduces corrosion, wear, or blockage of precision components such as sockets and plug oil bladders, lowering the frequency of component replacement due to long-term exposure, improving equipment durability, and extending the service life of the plug assembly.

[0031] In some embodiments, the socket assembly further includes at least one return spring disposed within the socket housing for providing preload to the socket oil bladder to compensate for internal pressure.

[0032] Beneficial effects: The return spring of the socket assembly provides preload to the socket oil bladder, which can compensate for internal pressure changes caused by temperature changes, such as thermal expansion and contraction of insulating oil due to diurnal temperature differences, insertion and removal operations, or external water pressure fluctuations; by adjusting the oil bladder volume through preload, it avoids sealing failure caused by excessive expansion or contraction of the oil bladder, ensures stable pressure in the insulating oil cavity, and maintains the insulation and sealing performance of the electrical connection area.

[0033] In some embodiments, the plug assembly further includes a cable outlet fixedly disposed at the tail of the plug housing for securing and sealing the dynamic cable.

[0034] Beneficial effects: The cable outlet of the plug assembly is fixed to the tail of the plug housing, rigidly connecting the dynamic cable to the plug housing through mechanical fastening. This prevents wear or loosening of the cable-plug connection due to frequent swaying caused by water flow impact or platform shaking. Simultaneously, the sealing design of the cable outlet prevents insulating oil leakage from the plug tail and blocks seawater intrusion from the cable inlet, further ensuring the overall sealing performance of the plug assembly.

[0035] In some embodiments, the quick-plug device is provided with a flange, and a first bend limiter and a second bend limiter are connected to the fixed port of the flange, and the dynamic cable is passed through the first bend limiter and the second bend limiter.

[0036] Beneficial effects: The first and second bend limiters are connected in series on the flange of the quick insertion and removal device, and the dynamic cable is passed through it. This design can prevent bending during the insertion and removal process. The first and second bend limiters together limit the bending radius of the dynamic cable during insertion and removal, prevent the fiber or conductor in the cable from breaking, and avoid the risk of the cable's electrical performance deterioration after reset.

[0037] In some embodiments, the floating offshore hydrogen-based energy production platform further includes:

[0038] A static cable and a dynamic cable are electrically connected via a static-dynamic cable junction box, with the end of the static cable away from the dynamic cable connected to the offshore wind farm.

[0039] The submarine fixing system has a first fixing end fixed to the dynamic cable and a second fixing end fixed to the seabed. The submarine fixing system and the dynamic and static cable junction box are spaced apart.

[0040] Beneficial effects: The static cable is fixed to the seabed, and only the dynamic cable is disconnected when it is released. No operation is required on the wind turbine side cable, avoiding wind turbine shutdown caused by repeated plugging and unplugging. In addition, the seabed fixing system and the junction box are spaced apart, so that the dynamic cable remains in a suspended cable state after being released, and can be directly reconnected when resetting.

[0041] In some embodiments, an anti-abrasion protective tube is fitted onto the dynamic cable between the submarine fixing system and the dynamic / static cable junction box.

[0042] Beneficial effects: The anti-abrasion tube helps to avoid friction between the dynamic cable and the seabed environment, thus extending its service life.

[0043] In some embodiments, a bend limiter and a positioning element are provided at the end of the static cable away from the dynamic cable, and a J-tube is installed on the offshore wind farm. The static cable passes through the bend limiter, the positioning element and the J-tube in sequence to connect with the wind turbine cable of the offshore wind farm.

[0044] Beneficial effects: By limiting the fluctuation of the static cable through the bending limiter and positioning component, and by coordinating them, the laying direction of the static cable can be adjusted to ensure that the bending radius is controllable and stable, thereby reducing the risk of cracking of the outer insulation layer caused by long-term oscillation.

[0045] In some embodiments, the dynamic cable is equipped with a plurality of gravity blocks adapted to increase the counterweight on the dynamic cable and a plurality of buoyancy blocks adapted to provide buoyancy to the dynamic cable, so as to configure the dynamic cable to be arranged in a wave pattern.

[0046] Beneficial effects: Several gravity blocks and buoyancy blocks are set on the dynamic cable, making it arranged in a wave pattern; the wave pattern helps to absorb tidal displacement, reduce the fatigue load of the dynamic cable, and improve the stability of the platform operation.

[0047] In some embodiments, the mooring assembly further includes a holding anchor fixed to one end of the lower anchor chain away from the anchor chain connection release device.

[0048] Beneficial effects: The mooring assembly uses holding anchors as the fixed foundation on the seabed side. The holding anchors have a good high gripping-to-weight ratio, which makes the mooring system formed by combining multiple mooring assemblies have good connection stability. The holding anchors have small displacement after being embedded in the seabed, ensuring that the anchor point remains unchanged after release, which facilitates repeated docking operations of the platform.

[0049] In some embodiments, the platform body has a three-layer structure;

[0050] The upper layer of the platform body is equipped with an energy storage system, a chemical synthesis system and a hydrogen production system. The hydrogen production system is used to receive high-purity fresh water transported from the lower layer and electrolyze it to produce hydrogen. The hydrogen is transported to the chemical synthesis system to synthesize chemical products. The energy storage system is used to store chemical products.

[0051] The middle layer of the platform body is equipped with an electrochemical energy storage system and a feed gas generator. The feed gas generator is used to provide nitrogen and feed gas for the hydrogen production system.

[0052] The lower layer of the platform body is equipped with an electrical system and a seawater desalination system. The electrical system is used to provide electrical energy, and the seawater desalination system extracts seawater through an extraction pipe and outputs high-purity fresh water to the hydrogen production system. Concentrated seawater is discharged through a discharge pipe.

[0053] Beneficial effects: The platform consists of three layers. The upper layer houses hydrogen production, storage, and chemical processing; the middle layer contains electrochemical energy storage and feed gas; and the lower layer houses electrical and seawater desalination systems. Placing the high-density equipment of the seawater desalination and electrical systems in the lower layer lowers the platform's center of gravity, improving structural stability. The vertical logistics paths for seawater desalination, hydrogen production, and chemical synthesis reduce pipeline length and energy consumption. The electrochemical energy storage system provides power buffering, supplying power to the platform before dismantling. The layered design isolates each system, allowing for layer-by-layer maintenance after dismantling and towing to the dock, eliminating the need for overall dismantling and facilitating maintenance.

[0054] Secondly, the present invention also provides a method for operating a floating offshore hydrogen-based energy production platform, comprising the following steps:

[0055] The production platform is driven by an auxiliary thruster, which allows the target mooring components to be in a relaxed state.

[0056] By controlling the anchor chain connection release device, the upper mooring cable is separated and unlocked from the lower anchor chain;

[0057] By controlling the quick-plug device, the dynamic cable is disconnected and the end is sealed;

[0058] After repeating the process to detach all mooring components, the production platform is towed away by an external towing vessel.

[0059] Beneficial effects: The operational steps include propulsion slack, anchor chain unlocking, cable insertion and removal, and towing evacuation. Propeller slack ensures all mooring components have zero tension, preventing elastic rebound during unlocking. This method relies on the coordination of auxiliary propulsion, anchor chain release devices, and quick-release devices, requiring no divers or ROVs throughout the process, resulting in rapid platform evacuation. This method is suitable for platforms with multiple mooring components, providing a safe evacuation mode for offshore hydrogen-based energy clusters during typhoon season. Attached Figure Description

[0060] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0061] Figure 1 This is a schematic diagram of the structure of a floating offshore hydrogen-based energy production platform according to an embodiment of the present invention;

[0062] Figure 2 This is a schematic diagram of the mooring assembly in the production platform according to an embodiment of the present invention;

[0063] Figure 3 This is a schematic diagram of the socket assembly of the quick-plug device in the production platform according to an embodiment of the present invention;

[0064] Figure 4 This is a schematic diagram of the plug assembly of the quick-plug device in the production platform according to an embodiment of the present invention;

[0065] Figure 5 This is a schematic diagram showing the connection between the socket assembly and the plug assembly of the quick-plug device in the production platform of this invention.

[0066] Explanation of reference numerals in the attached figures:

[0067] 1. Platform body; 2. Energy storage system; 3. Chemical synthesis system; 4. Hydrogen production system; 5. Electrochemical energy storage system; 6. Raw material gas generator; 7. Electrical system; 8. Seawater desalination system; 9. Extraction pipe; 10. Discharge pipe; 11. Floating body foundation; 12. Auxiliary thruster; 13. Upper mooring cable; 14. Anchor chain connection and release device; 15. Lower anchor chain; 16. Holding anchor; 17. Quick-release device; 18. Flange; 19. First bend limiter; 20. Second bend limiter; 21. Dynamic cable; 22. Gravity block; 23. Buoyancy block; 24. Subsea anchoring system; 25. Protection 26. Grinding protection tube; 27. Dynamic and static cable junction box; 28. Static cable; 29. ​​Bending limiter; 30. Positioning component; 31. J-tube; 32. Offshore wind farm; 33. Float module; 34. Adapter module; 105. Hydraulic snap-fit ​​module; 106. Socket housing; 107. Through hole; 108. Socket sealing kit; 109. Electrical pin; 100. Socket oil bladder; 101. Return spring; 102. Socket base; 103. Plug housing; 114. Plug sealing kit; 115. Socket hole; 116. Plug oil bladder; 117. Outlet socket; 118. Plug base; 119. Sealing cover. Detailed Implementation

[0068] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0069] The following is combined Figure 1 and Figure 2 The following describes embodiments of the present invention.

[0070] According to embodiments of the present invention, in one aspect, an easily detachable floating offshore hydrogen-based energy production platform is provided, such as... Figure 1 As shown, the production platform includes a platform body 1, a floating base 11, a mooring system, a quick-release device 17, and a dynamic cable 21. The floating base 11 is anchored to the seabed via the mooring system. The mooring system includes one or more mooring components, each of which includes an upper mooring cable 13, an anchor chain connection and release device 14, and a lower anchor chain 15 connected in series. The upper mooring cable 13 is fixedly connected to the floating base 11, and the lower anchor chain 15 is adapted to be fixed to the seabed. The quick-release device 17 is installed between the platform body 1 and the dynamic cable 21. The platform body 1 is connected to the offshore wind farm 31 via the dynamic cable 21.

[0071] In this embodiment, an auxiliary thruster 12 is installed on one side wall of the floating body base 11. The auxiliary thruster 12 is used for platform positioning and movement adjustment during disengagement.

[0072] The production platform provided in this embodiment specifically includes a platform body 1, a floating foundation 11, a mooring system, a quick-connect device 17, a dynamic cable 21, and an auxiliary thruster 12. The floating foundation 11 provides a buoyancy environment and installation foundation for the platform body 1. The mooring assembly is connected in three sections in series through the upper mooring cable 13, the anchor chain connection and release device 14, and the lower anchor chain 15. The quick-connect device 17 is installed between the dynamic cable 21 and the offshore wind farm 31. The auxiliary thruster 12 is installed on the side wall of the floating foundation 11.

[0073] In this embodiment, multiple mooring components are connected by an anchor chain release device 14 to disconnect the anchoring position, allowing the production platform to be withdrawn from the anchoring area to avoid platform damage caused by anchor chain breakage in extreme wind and wave environments such as typhoons. The electrical connection between the dynamic cable 21 and the offshore wind farm 31 is disconnected by a quick-plug device 17, adopting a non-destructive cable disconnection method to avoid the repeated deployment costs caused by traditional cutting. After release, the production platform can be repositioned by tugboats without cutting and re-laying anchor chains and cables, making operation and maintenance convenient. During the release phase, the auxiliary thruster 12 provides thrust to counteract the residual mooring tension, loosening the mooring and facilitating the separation between the upper mooring cable 13 and the lower anchor chain 15, thus improving safety.

[0074] In this embodiment, the auxiliary thruster 12 can precisely adjust the platform position, ensuring that the anchor chain is loose when released and quickly aligned when reset, reducing reliance on external tugboats.

[0075] In an exemplary embodiment, such as Figure 2 As shown, the anchor chain connection release device 14 includes a float module 32, a hydraulic latch module 34, and a control system (not shown in the figure); the float module 32 adjusts the buoyancy by buoyancy through water inlet and outlet to adjust the position of the lower anchor chain 15; the first latching end of the hydraulic latch module 34 is connected to the upper mooring cable 13, and the second latching end is connected to the lower anchor chain 15, and the first latching end and the second latching end are latched together; the control system is adapted to remotely control the connection locking and unlocking between the first latching end and the second latching end of the hydraulic latch module 34.

[0076] In this embodiment, the anchor chain connection release device 14 consists of a float module 32, a hydraulic latch module 34, and a control system. The float module 32 actively unloads the load, using water intake and drainage to adjust buoyancy, allowing the lower section of the anchor chain 15 to exit the tension state, facilitating release and preventing the hydraulic latch module 34 from bearing impact loads, thus improving unlocking reliability. The control system allows for remote operation; users can wirelessly trigger the release from the control room or tugboat, eliminating the need for underwater diver operations and facilitating release even in extreme sea conditions. The hydraulic latch module 34 can be repeatedly locked and unlocked, offering good reusability.

[0077] In a specific embodiment, the hydraulic locking module 34 includes an annular locking ring assembly (not shown in the figure) and a locking rod (not shown in the figure). The annular locking ring assembly is located at the first locking end, and the locking rod is located at the second locking end. One end of the locking rod is sleeved inside the annular locking ring assembly. The annular locking ring assembly is configured as multiple radially movable semi-ring units that can be spliced ​​together to form an annular shape. The end of the locking rod facing the annular locking ring assembly can be configured as a ball head rod, and the end facing away from the locking ring assembly is fixedly connected to the lower anchor chain 15. By hydraulically driving the semi-ring unit to move radially away from the release ball head rod, the separation between the upper mooring cable 13 and the lower anchor chain 15 can be completed. When docking is required, the ball head rod is placed inside the annular locking ring assembly, and the semi-ring unit is hydraulically driven to move radially closer to the locking ball head rod.

[0078] In some embodiments, such as Figure 2 As shown, the anchor chain connection release device 14 also includes a transfer module 33. One end of the transfer module 33 is fixedly installed with the pontoon module 32, and the other end is fixedly installed with the hydraulic buckle module 34. In this embodiment, the transfer module 33 is added to fix the pontoon module 32 and the hydraulic buckle module 34. The transfer module 33 serves as a rigid transition section, uniformly transmitting the buoyancy of the pontoon to the hydraulic buckle, avoiding structural fatigue caused by stress concentration, and thus extending the service life of the overall structure. When the hydraulic buckle needs maintenance, it can be repaired by disassembling the transfer module 33 without disassembling the entire pontoon module 32, which helps to improve work efficiency.

[0079] In a specific embodiment, the adapter module 33 is configured as a hinge structure to serve as a flexible buffer between the float module 32 and the hydraulic latch module 34, thereby preventing wave loads from being directly transmitted to the hydraulic latch module 34 and ensuring its reliability in long-term operation in a dynamic marine environment.

[0080] In practical implementation, the float module 32 has water inlet and outlet functions. It can control the raising and lowering of the lower anchor chain 15 by adjusting its own buoyancy, assisting in maintaining the position and configuration of the submarine cable when the lower anchor chain 15 is reconnected, facilitating connection operations by the underwater robot. The control system can be remotely controlled, or of course, manually controlled via the hydraulic latch switch. When it is necessary to release the upper mooring cable 13, the control system is activated to recover the hydraulic pressure in the hydraulic cylinder, thereby drawing the push rod into the hydraulic cylinder, and the previously engaged... Figure 2 The triangular plate shown then separates, and the entire mooring cable detaches from the platform. When the mooring cable needs to be reconnected, the underwater robot aligns the push rod of the hydraulic buckle module 34 with the corresponding buckle hole of the triangular plate, then activates the control system to discharge the hydraulic pressure in the hydraulic cylinder, causing the push rod to be pushed into the hydraulic cylinder. At this time, the mooring cable is connected to the triangular plate, and the reconnection of the entire mooring cable is completed.

[0081] In some embodiments, the mooring assembly further includes a holding anchor 16, which is fixedly disposed at the end of the lower anchor chain 15 away from the anchor chain connection release device 14. In this embodiment, the mooring assembly uses a group of holding anchors 16 as the fixed foundation on the seabed side. The holding anchors 16 have a good high gripping-to-weight ratio, which gives the mooring system formed by combining multiple mooring assemblies good connection stability. The holding anchors 16 have small displacement after being embedded in the seabed, ensuring that the anchor point remains unchanged after release, which facilitates repeated docking operations of the platform.

[0082] The mooring cable arrangement methods that can be adopted in this application are as follows:

[0083] 1. Single-point mooring: Single-point mooring is the simplest mooring method, using only one mooring cable to connect the structure to a single anchor point; it is suitable for shallow water and mild environmental conditions.

[0084] 2. Multi-point mooring: Multi-point mooring uses multiple mooring cables to connect the structure to multiple anchor points to improve stability and safety. The number and arrangement of mooring cables can be adjusted according to specific needs. Multi-point mooring arrangements include three-point mooring, four-point mooring, five-point mooring, etc.

[0085] 3. Circular mooring: Circular mooring is a mooring method in which mooring cables are arranged in a circle to fix the structure within a circular or elliptical area; it is suitable for situations where the movement range of the structure needs to be restricted.

[0086] 4. Distributed mooring: Distributed mooring is a mooring method in which mooring cables are arranged in a distributed manner, fixing the structure in multiple locations to distribute the load and improve stability; it is suitable for large structures or complex environmental conditions.

[0087] Preferably, in the embodiments of this application, the mooring scheme adopted is a multi-point mooring scheme.

[0088] In this embodiment, the auxiliary thruster 12 provides additional propulsion to help the platform adjust its position, locate, and move at sea. Its implementation includes, but is not limited to, propellers, water jets, and other types of propulsion devices.

[0089] In the specific operation process, the main functions of the auxiliary thruster 12 include:

[0090] 1. Platform position adjustment and positioning: During the platform installation, transportation and positioning process, the auxiliary thruster 12 can provide the platform with additional power beyond the tugboat, and finely adjust the platform's orientation and angle.

[0091] 2. Platform relocation: After the platform is detached, the auxiliary thruster 12 can provide a certain amount of power to the platform, enabling it to move a longer distance to avoid potential hazards;

[0092] 3. The platform is resistant to wind and waves. The auxiliary thruster 12 can also help the platform maintain a good shape and position when it is in the face of wind and waves, and resist the negative impact of wind and waves on the platform.

[0093] In an exemplary embodiment, the quick-plug device 17 includes a socket assembly and a plug assembly. The socket assembly is fixedly mounted on a floating offshore platform, and the plug assembly is fixedly mounted on the end of a dynamic cable. The plug assembly is adapted to seal and disconnect from the socket assembly.

[0094] Specifically, such as Figures 3 to 5 As shown, the socket assembly includes a socket housing 101, a socket base 107, multiple electrical pins 104, and a socket oil reservoir 105. The socket base 107 is fixedly disposed within the socket housing 101, and multiple through holes 102 are formed on the socket base 107. The electrical pins 104 are correspondingly fixedly disposed within the through holes 102, and the outer diameter of the electrical pins 104 is larger than the diameter of the through holes 102 to achieve an interference fit. The electrical pins 104 and the through holes 102 of the socket base 107 are interference-fitted, and can be mechanically... The pre-tightening force ensures that the electrical pins 104 do not loosen under dynamic conditions such as platform shaking and water flow impact, avoiding power outages or signal interruptions due to poor contact, and ensuring the continuity of power transmission; the plug assembly includes a plug housing 108, a plug base 113, multiple sockets 110, and a plug oil bladder 111; the plug base 113 is fixedly installed inside the plug housing 108, and the sockets 110 are fixedly installed inside the plug base 113, with each socket 110 corresponding to one of the electrical pins 104 of the socket assembly.

[0095] like Figure 3 and Figure 4As shown, the socket oil bladder 105 is embedded in the socket base 107, and the internal cavity of the socket housing 101 is filled with insulating oil; the internal cavity of the plug housing 108 is filled with insulating oil; when the plug assembly and the socket assembly are mated, the electrical pin 104 is inserted into the corresponding socket 110 to achieve electrical connection, and the entire electrical connection part after mating is immersed in insulating oil. The plug oil bladder 111 is disposed within the plug housing 108. Both the socket assembly and the plug assembly have internal cavities filled with insulating oil, and the entire electrical connection is immersed in the insulating oil after mating. The insulating oil not only isolates the electrical pins 104 and sockets 110 from corrosive media such as seawater and moisture, but also reduces the risk of short circuits due to the high insulation properties of the oil, adapting to the extreme environment of high humidity and high salt spray at sea. By embedding the socket oil bladder 105 and the plug oil bladder 111 into the base or housing, the elastic deformation of the oil bladder compensates for minute gaps during mating, and the fluidity of the insulating oil achieves dynamic sealing, ensuring that the insulating oil is not prone to leakage during insertion and removal. The oil bladder can compensate for the expansion or contraction of the insulating oil volume due to temperature or depth changes, always maintaining an internal pressure slightly higher than the external water pressure, thereby effectively preventing seawater infiltration and ensuring the long-term effectiveness of the seal. This effectively prevents external seawater from intruding into the electrical connection area, providing a stable sealing foundation for rapid separation and mating. In specific embodiments, silicone oil or other insulating oils are used.

[0096] In a further embodiment, such as Figures 3 to 5 As shown, the socket assembly also includes a socket sealing kit 103, which is disposed at the port of the socket housing 101 and is used to form a seal with the plug housing 108 during mating; the plug assembly also includes a plug sealing kit 109, which is disposed at the port of the plug housing 108 and is used to form a seal with the socket housing 101 during mating.

[0097] In this design, the socket sealing kit 103 and the plug sealing kit 109 are respectively installed at the ports of the socket housing 101 and the plug housing 108. During mating, they form a seal at the port, further preventing external seawater, silt, and other impurities from entering through the mating gaps in addition to the insulating oil seal of the electrical connection. This avoids contamination or dilution of the insulating oil, thus strengthening the sealing design. The double sealing of the port sealing kit and the internal insulating oil ensures the stability of the insulating oil environment, effectively reducing leakage caused by external pressure fluctuations or insertion / removal operations. It maintains the fullness of the insulating oil in the electrical connection area, ensuring that the insulation performance does not degrade during long-term use and extending the equipment's service life. Furthermore, under extreme wind and wave conditions such as typhoons and giant waves, the relative displacement between the platform and the dynamic cable may increase. The sealing kit can compensate for minor misalignments of the mating surfaces through elastic deformation, preventing seal failure and ensuring the sealing performance of the insertion / removal device under dynamic operating conditions.

[0098] In a specific embodiment, the socket sealing kit 103 is made of rubber material, and a rubber sealing ring can be provided at the through hole 102.

[0099] In a further embodiment, such as Figure 4 As shown, the plug assembly also includes a removable sealing cover 114, which is adapted to close onto the plug sealing kit 109 after the plug assembly is separated from the socket assembly. When the plug assembly is separated from the socket assembly, such as during platform relocation or maintenance, the sealing cover 114 can quickly close onto the plug sealing kit 109, forming a physical barrier to prevent the plug sealing kit 109 from being directly exposed to the seawater environment. This prevents seawater, marine organisms, silt, and other impurities from adhering to or intruding into the socket 110 and insulating oil cavity inside the plug, thus preventing contaminants from causing sealing failure or electrical connection faults during subsequent docking. The protection provided by the sealing cover 114 reduces corrosion, wear, or blockage of precision components such as the socket 110 and plug oil bladder 111, lowers the frequency of component replacement due to long-term exposure, improves equipment durability, and helps extend the service life of the plug assembly.

[0100] The quick plug-in / plug-out device 17 provided in this embodiment allows the plug assembly to be submerged in the sea after electrical disconnection by adding a sealing cap 114 to the plug sealing kit 109; when reconnection is required, the sealing cap 114 can be removed from the plug assembly to begin the re-plugging and reconnection of the submarine cable.

[0101] In a preferred embodiment, such as Figure 3 As shown, the socket assembly also includes one or more return springs 106, which are disposed within the socket housing 101 and are used to provide preload force to the socket oil bladder 105 to compensate for internal pressure. The return springs 106 of the socket assembly provide preload force to the socket oil bladder 105, compensating for internal pressure changes caused by temperature variations, such as thermal expansion and contraction of insulating oil due to diurnal temperature differences, insertion and removal operations, or external water pressure fluctuations. By adjusting the oil bladder volume through the preload force, it prevents excessive expansion or contraction of the oil bladder, thus avoiding sealing failure and ensuring stable pressure in the insulating oil cavity, maintaining the insulation and sealing performance of the electrical connection area.

[0102] In a preferred embodiment, such as Figure 4 and Figure 5As shown, the plug assembly also includes a cable outlet 112, which is fixedly disposed at the tail of the plug housing 108 for securing and sealing the dynamic cable. Fixing the cable outlet 112 to the tail of the plug housing 108 mechanically secures the dynamic cable to the plug housing 108, preventing wear or loosening of the cable-plug connection due to frequent swaying during water flow impacts or platform vibrations. Simultaneously, the sealing design of the cable outlet 112 prevents insulating oil leakage from the plug tail and blocks seawater intrusion from the cable inlet, further ensuring the overall sealing performance of the plug assembly.

[0103] In some embodiments, such as Figure 1 As shown, the quick-connect device 17 is equipped with a flange 18. A first bend limiter 19 and a second bend limiter 20 are connected to the fixed port of the flange 18. The dynamic cable 21 is passed through the first bend limiter 19 and the second bend limiter 20. In this embodiment, the first bend limiter 19 and the second bend limiter 20 are connected in series on the flange 18 of the quick-connect device 17, and the dynamic cable 21 is passed through it. This design serves to prevent bending during the insertion and removal process. The first bend limiter 19 and the second bend limiter 20 together limit the bending radius of the dynamic cable 21 during insertion and removal, preventing the fiber or conductor inside the cable from breaking and avoiding the risk of attenuation of the cable's electrical performance after reset.

[0104] In a specific embodiment, flange 18 is a Haver-type flange 18, the first bend limiter 19 is a polyurethane bend limiter, and the second bend limiter 20 is a metal bend limiter. This design adopts a dual bend-limiting scheme, where the polyurethane bend limiter absorbs high-frequency, small-amplitude vibrations, and the metal bend limiter resists large-amplitude bending stress; mechanical bend limiting protects the integrity of the cable structure and extends its service life.

[0105] In some embodiments, such as Figure 1 As shown, the floating offshore hydrogen-based energy production platform also includes a static cable 27 and a subsea fixing system 24. The static cable 27 and the dynamic cable 21 are electrically connected through a static / dynamic cable junction box 26. The end of the static cable 27 away from the dynamic cable 21 is connected to the offshore wind farm 31. The first fixed end of the subsea fixing system 24 is fixedly installed with the dynamic cable 21, and the second fixed end is fixedly installed with the seabed. The subsea fixing system 24 and the static / dynamic cable junction box 26 are spaced apart. In this embodiment, the static cable 27 is fixed to the seabed. When disconnected, only the dynamic cable 21 is disconnected. The wind turbine side cable does not require any operation, avoiding wind turbine shutdown caused by repeated plugging and unplugging. In addition, the spaced arrangement of the subsea fixing system 24 and the junction box ensures that the dynamic cable 21 remains suspended after disconnection and can be directly reconnected when reset.

[0106] In some embodiments, such as Figure 1As shown, an anti-abrasion protective tube 25 is fitted onto the dynamic cable 21 between the subsea fixed system 24 and the dynamic / static cable junction box 26. The anti-abrasion tube helps to prevent the dynamic cable 21 from rubbing against the seabed environment and extends its service life.

[0107] In some embodiments, such as Figure 1 As shown, a bend limiter 28 and a positioning element 29 are installed at the end of the static cable 27 furthest from the dynamic cable 21. A J-shaped pipe 30 is installed on the offshore wind farm 31. The static cable 27 passes through the bend limiter 28, the positioning element 29, and the J-shaped pipe 30 in sequence to connect to the wind turbine cable of the offshore wind farm 31. The bend limiter 28 and the positioning element 29 limit the fluctuation of the static cable 27 and, through their cooperation, adjust the laying direction of the static cable 27 to ensure that the bending radius is controllable and stable, reducing the risk of cracking of the outer insulation layer due to long-term oscillation. The positioning element 29 adopts a center-limiting method.

[0108] In some embodiments, such as Figure 1 As shown, the dynamic cable 21 is equipped with several gravity blocks 22 suitable for increasing the counterweight on the dynamic cable 21 and several buoyancy blocks 23 suitable for providing buoyancy to the dynamic cable 21, so that the dynamic cable 21 is arranged in a wave-like pattern. The arrangement of several gravity blocks 22 and buoyancy blocks 23 on the dynamic cable 21 to make it wave-like is beneficial for absorbing tidal displacement, reducing the fatigue load on the dynamic cable 21, and improving the stability of the platform operation.

[0109] In some embodiments, such as Figure 1 As shown, the platform body 1 has a three-layer structure. The upper layer of the platform body 1 is equipped with an energy storage system 2, a chemical synthesis system 3, and a hydrogen production system 4. The hydrogen production system 4 is used to receive high-purity fresh water transported from the lower layer and electrolyze it to produce hydrogen. The hydrogen is then transported to the chemical synthesis system 3 to synthesize chemical products. The energy storage system 2 is used to store the chemical products. The middle layer of the platform body 1 is equipped with an electrochemical energy storage system 5 and a raw material gas generator 6. The raw material gas generator 6 is used to provide nitrogen and raw material gas to the hydrogen production system 4. The lower layer of the platform body 1 is equipped with an electrical system 7 and a seawater desalination system 8. The electrical system 7 is used to provide electrical energy. The seawater desalination system 8 extracts seawater through an extraction pipe 9 and outputs high-purity fresh water to the hydrogen production system 4. The concentrated seawater is discharged through a discharge pipe 10.

[0110] The production platform provided in this embodiment is divided into three layers: the upper layer houses hydrogen production, hydrogen storage, and chemical processing; the middle layer contains electrochemical energy storage and feed gas; and the lower layer houses electrical systems and seawater desalination. Placing the high-density equipment of the seawater desalination system 8 and electrical system 7 in the lower layer lowers the platform's center of gravity, improving structural stability. The vertical logistics path for seawater desalination, hydrogen production, and chemical synthesis reduces pipeline length and energy consumption. The electrochemical energy storage system 5 provides power buffering, supplying power to the platform before disassembly. The layered design isolates each system, allowing for layer-by-layer maintenance after disassembly and towing to the dock, eliminating the need for overall disassembly and facilitating maintenance.

[0111] In the specific operation, an integrated reverse osmosis seawater desalination module can be used to draw seawater into the platform and filter out various impurities in the seawater; remove the salt in the seawater to obtain high-purity fresh water, which is then transported to the hydrogen electrolyzer through pipelines; and the by-product high-concentration seawater is discharged into the sea.

[0112] In the specific operation process, Electrical System 7 is responsible for providing a stable power supply to the platform, ensuring the normal operation of each subsystem and overall energy management. Its main functions include:

[0113] 1. Connect to an external power source and provide the necessary power to the platform through transformers and rectifiers;

[0114] 2. By monitoring and adjusting the electricity demand of each subsystem through energy management, energy allocation can be optimized, energy efficiency can be improved, and energy waste can be reduced;

[0115] 3. When the external power supply is cut off, promptly control the energy storage system to discharge and maintain the normal operation of the internal system;

[0116] 4. When there is no external power input and the internal energy storage is about to be depleted, the platform's internal systems should be shut down in a reasonable manner.

[0117] In practical operation, the electrochemical energy storage system 5 is a key energy management module of the platform, responsible for storing and regulating the electrical energy generated during platform operation to improve energy utilization efficiency. Its main functions include:

[0118] 1. Utilize grid-type electrochemical energy storage technologies (such as lithium batteries, sodium-sulfur batteries, or flow batteries) to store excess electrical energy and provide rotational inertia support for some equipment on the platform;

[0119] 2. Based on the platform's power demand, the stored electrical energy is released in real time to provide stable power support for each subsystem;

[0120] 3. Monitor the operating status of energy storage devices, including battery capacity, charging and discharging efficiency, and lifespan, to ensure the safety and reliability of the energy storage system;

[0121] 4. Optimize charging and discharging strategies through an intelligent energy management system to achieve efficient energy scheduling and optimal utilization.

[0122] In the specific working process, the raw material gas generator 6 is responsible for processing and transporting the gaseous raw materials required for hydrogen production or chemical synthesis. Its main functions include:

[0123] 1. Store and transport hydrogen generated from the electrochemical system, and adjust the pressure and flow rate to meet the needs of the hydrogen production or chemical synthesis system 3;

[0124] 2. A nitrogen generation device using electricity, such as a pressure swing adsorption nitrogen generator or a membrane separation nitrogen generator, is used for purging and deoxygenation in the electrolytic cell for hydrogen production.

[0125] 3. Equip the system with raw material gas (carbon monoxide, carbon dioxide, etc.) generation system to produce and store the gas raw materials and ensure that the gas purity and parameters meet the requirements of downstream processes;

[0126] 4. Equip with safety devices to monitor gas pressure and flow rate in the pipeline to prevent leaks or overpressure accidents.

[0127] In the actual operation, hydrogen production system 4 is the core functional module of the platform, responsible for the efficient production of high-purity hydrogen. Its main functions include:

[0128] 1. The PEM electrolysis water production technology is adopted to electrolyze high-purity fresh water into hydrogen using an electrolyzer, ensuring high hydrogen production efficiency and high purity. The equipment is characterized by miniaturization and resistance to fluctuations, and includes at least the following modules: PEM electrolyzer, gas-liquid separation system, compressor, buffer tank, and electrolyte circulation device.

[0129] 2. The prepared hydrogen is efficiently stored for later use using advanced compression and storage equipment;

[0130] 3. Monitor energy consumption and output in the hydrogen production process in real time, and optimize hydrogen production efficiency and reduce operating costs through intelligent operation strategies.

[0131] In the specific working process, chemical synthesis system 3 is a key device that chemically reacts hydrogen with other raw material gases to generate the target chemical product. Its main functions include:

[0132] 1. Using a catalytic converter, hydrogen and carbon dioxide are combined to synthesize methanol, ammonia, or other chemical raw materials;

[0133] 2. Optimize reaction conditions (such as temperature, pressure, and catalyst activity) to improve the conversion rate and selectivity of chemical synthesis;

[0134] 3. Treat the byproducts generated during the reaction process to ensure that emissions meet environmental protection requirements.

[0135] In its specific operation, Energy Storage System 2 is responsible for storing and managing the hydrogen and other energy generated by the platform to balance fluctuations between production and usage. Its main functions include:

[0136] 1. Storing the prepared hydrogen through high-pressure storage tanks or liquid storage technology ensures storage safety and efficiency;

[0137] 2. Provide appropriate interface devices to transport the produced energy away from the platform by ship or pipeline;

[0138] 3. Monitor and manage the platform's energy reserves in real time to ensure the sustainability of energy supply and emergency response capabilities.

[0139] In the above description, the structure of the floating body foundation 11 includes, but is not limited to, single-column, semi-submersible, barge, and tension leg structures.

[0140] This invention provides an easily detachable floating offshore hydrogen-based energy production platform with rapid detachment and repositioning capabilities. It can be quickly detached and redeployed during typhoon sheltering, maintenance, and other emergencies, significantly improving safety and flexibility. The platform adopts a three-layer structure, integrating seawater desalination, electrochemical energy storage, hydrogen production, chemical synthesis, and energy storage systems. The seawater desalination system provides fresh water for hydrogen production, the hydrogen production system employs wave-resistant PEM electrolyzer technology, and the chemical synthesis system is lightweight and designed to produce various hydrogen-based fuels (such as ammonia and methanol). The platform supports the storage and shipping / pipeline output of various energy forms (compressed hydrogen, liquid hydrogen, etc.) to meet diverse needs. The rapid detachment device for the anchor chain and dynamic cable, combined with the rapid insertion / removal device 17, enhances modularity and scalability. Intelligent scheduling is achieved through an energy management system, improving operational efficiency and safety, providing an efficient and reliable solution for offshore hydrogen-based energy production.

[0141] The production platform provided by this invention has the following implementation steps:

[0142] Step 1: Complete the assembly and commissioning of the offshore hydrogen-based energy production platform on land.

[0143] The equipment is outfitted and its overall operation and commissioning are completed on the platform body 1, including the energy storage system 2, chemical synthesis system 3, hydrogen production system 4, electrochemical energy storage system 5, raw material gas generator 6, electrical system 7, and seawater desalination system 8 (water intake and output are achieved through seawater extraction pipe 9 and concentrated seawater discharge pipe 10), as well as the related pipes, wires, valves, and control components shown in the diagram. Afterwards, the upper and lower floating foundations 11 of the platform are connected. The design of the floating foundation 11 should fully consider the overall load and wind and wave resistance requirements of the platform.

[0144] Step 2: Platform integrated towing.

[0145] After the platform and its equipment are assembled in an integrated manner at the land base, they are released from temporary mooring and a special towing vessel with automatic positioning and automatic motion monitoring functions is selected to tow the platform structure to the vicinity of the predetermined location. Then, the platform is accurately positioned by the cooperation of the tugboats and the auxiliary propulsion unit 12.

[0146] Step 3: Installation of the mooring system.

[0147] This embodiment employs an 8-point mooring arrangement and a catenary mooring scheme. The mooring chain structure includes an upper mooring cable 13, an anchor chain connection and release device 14, and a lower anchor chain 15. Before the floating platform arrives on site, the anchor system is pre-installed. After the holding anchor 16 and the lower anchor chain 15 are connected, they are sequentially placed at the anchor points (a total of 8 points in this example). The construction process is as follows:

[0148] (1) The construction vessel is in place, the end of the anchor chain is connected to the holding anchor 16, and the crane vessel is used to lift the holding anchor to the seabed. The lower mooring chain is lowered along with the anchor.

[0149] (2) The foundation of the holding anchor 16 enters the water under its own weight. After the holding anchor is hoisted to the seabed, the anchor body is pulled by the anchor boat to pull the anchor chain.

[0150] (3) The crane vessel moves along the anchor chain laying direction and lays the lower section of anchor chain 15. The upper end of the lower section of anchor chain 15 is connected to the anchor chain connection release device 14. The anchor chain connection release device 14 includes a float module 32, a transfer module 33 and a hydraulic buckle module 34. The float module 32 can be used as a buoy during installation.

[0151] (4) Lay the remaining holding anchors and remaining mooring chains in sequence.

[0152] Step 4: Complete the design and procurement of the dynamic cable.

[0153] The dynamic cable 21 should have the following functions: One end connected to the offshore energy platform is equipped with a quick-connect device 17, which connects to a polyurethane bend limiter via a Haver flange. The metal bend limiter restricts the angle at which the dynamic cable 21 connects to the platform. The dynamic cable 21 maintains a predetermined wave shape in the water via gravity blocks 22 and buoyancy blocks 23, with its bottom connected to the seabed via a subsea anchoring system 24 and equipped with an anti-abrasion protective tube 25. On the seabed, the static cable 27 is connected to the dynamic cable 21 via a dynamic / static cable junction box 26. The static cable 27 is connected to the generator of the fixed offshore wind farm 31 via a J-tube 30. One end of the static cable is equipped with a bend limiter 28, and one end of the J-tube is equipped with a positioning element 29. The cable configuration needs to be precisely calculated using finite element analysis to meet the requirements for wind and wave resistance.

[0154] Step 5: Dynamic cable laying.

[0155] The hydrogen-based energy production platform connects to the generator of the adjacent fixed offshore wind farm 31. To avoid interference between the cable and the platform's anchor chain, a sufficient safe laying distance should be maintained between the cable and the platform's mooring anchor chain during cable laying. The dynamic submarine cable is laid directly on the seabed using an open-lay method. The wind turbine section of the dynamic cable can be protected by covering it with sand blankets, cement blocks, or geogrid with crushed stone. The selected construction vessel group consists of a cable laying vessel, a tugboat, and an anchor boat.

[0156] 1. Laying preparation work

[0157] (1) The submarine cable is lifted by the crane ship onto the construction ship and coiled on the construction ship with an iron plate or a rotatable tray for transportation.

[0158] (2) After the construction vessel arrives at the construction area, a preparation site is set up.

[0159] (3) Seabed Sweeping. To ensure the safety of construction vessels, anchor boats, tugboats, and cables during the construction process, seabed sweeping is required in the construction area before formal construction. Seabed sweeping operations are conducted using anchor boats or tugboats with dedicated seabed sweeping anchors at their sterns. These boats are repeatedly towed along the cable laying route to remove seabed obstacles. The sweeping removes surface debris and obstacles from the seabed, such as steel cables or ropes crossing the route, unidentified reactive substances identified during the route survey, and other materials that may hinder the laying of cables. Seabed sweeping does not cover areas with known submarine pipelines to prevent accidental damage.

[0160] 2. Submarine cable laying

[0161] To ensure construction safety and reliability, the dynamic submarine cable is installed in a sequence from the sea surface to the seabed. First, the connection between the dynamic submarine cable and the platform is installed, and then the submarine cable is laid to the connection between the fixed wind turbine and the platform.

[0162] (1) After the construction vessel arrives at the designated position, the traction head of the dynamic cable 21 is lifted, passed through the polyurethane bend limiter and the metal bend limiter, and connected to the quick-plug device 17 through the Haver flange to access the platform electrical system 7.

[0163] (2) When the construction vessel moves, the dynamic cable 21 is lowered. During the lowering process, the buoyancy block 23 and gravity block 22 are installed gradually. The construction vessel is then started to move forward towards the platform by anchoring.

[0164] (3) A professional submarine cable laying vessel was used to lay the static cable 27. GPS positioning system was used for positioning during cable laying, and the laying accuracy of the traction steel cable was controlled within ±5m of the planned route. The dynamic cable 21 and the static cable 27 were connected through the dynamic and static cable joint box 26, and anti-wear protective pipe 25 was installed at the joint end.

[0165] (4) After the cable is laid, the cable can be protected by covering it with sand, cement blocks or geonet and gravel in the generator section near the fixed offshore wind farm 31.

[0166] (5) The cable is connected to the generator of the fixed offshore wind farm 31 through the bending limiter 28, the positioning piece 29 and the J-shaped tube 30, which is a conventional submarine cable installation process.

[0167] Step 6: Platform Operation

[0168] The floating offshore hydrogen-based energy production platform operates with a highly efficient and integrated design philosophy. Its daily operation, from energy acquisition to product output, forms a smooth closed-loop system. First, the platform is connected to the generator of the fixed offshore wind farm 31 via dynamic cable 21, transmitting the generated electricity to the platform. Simultaneously, the seawater desalination system 8, located on the lower level of the platform, is activated to extract fresh water from the surrounding seawater, providing the necessary water resources for subsequent hydrogen production and chemical synthesis. The electrical system 7 is responsible for regulating the electrical energy input from the wind power plant, ensuring a stable and efficient power supply.

[0169] In the middle layer, the electrochemical energy storage system 5 plays a role in storing surplus wind power for unforeseen needs, while the raw material gas system 6 begins to collect and process raw material gases from the environment, such as nitrogen and other necessary gases from the air, to provide basic raw materials for chemical synthesis.

[0170] Next, the upper-level hydrogen production system 4 uses PEM water electrolysis technology to decompose fresh water into hydrogen and oxygen. The generated hydrogen is then transported to the chemical synthesis system 3. In the chemical synthesis system 3, hydrogen participates in reactions with other raw material gases to synthesize various hydrogen-based energy sources or chemical products, such as ammonia and methanol. These products are then stored in the upper-level energy storage system 2, awaiting transport via pipelines or ships.

[0171] Step 7: Platform Detachment

[0172] Once the release system command is initiated, the connection between the platform and the dynamic cable is first disconnected, and the power supply to the cable is cut off to ensure no power transmission. Then, the dynamic cable 21 is physically separated from the platform by operating the quick-release device 17, and the end is sealed. After sealing, the dynamic cable 21 is sunk to the seabed.

[0173] Next, the mooring system is released. The auxiliary thruster 12 operates according to the real-time monitoring of the platform's movement, moving the platform towards the upper mooring cable 13 to be released, until the upper mooring cable 13 is slack. Then, the anchor chain release device separates the platform-end anchor chain from the lower anchor chain. Simultaneously, the buoy module 32's drainage system is activated, gradually allowing the separated lower anchor chain 15 to lie on the bottom. This process is then repeated for the other seven upper mooring cables 13. Finally, after the mooring system is completely released, the towing vessel enters and tows the platform to the dock.

[0174] Step 8: Platform return installation

[0175] The platform's auxiliary thrusters correct the platform's attitude and position, activate and complete the disengagement device, and open and complete the buoy drainage system. Then, in this manner, the other two mooring cables are connected. During the reconnection process, personnel need to monitor the platform's motion attitude and the tension on the mooring cables in real time using monitoring equipment. The platform system adjusts the thruster size and direction in real time based on the actual situation and algorithms. First, the buoy drainage system is activated to raise the buoy module 32 to its installation position. When the mooring cable shows slack, the hydraulic locking system is aligned using an underwater robot.

[0176] The underwater robot locates the submerged dynamic cable device, guides the construction vessel to the designated position, and then lifts the traction head of the dynamic cable 21, passing it through the polyurethane bend limiter and the metal bend limiter to remove seawater. It then connects to the platform's electrical system 7 via a Haver flange and quick-connect device 17.

[0177] According to an embodiment of the present invention, another aspect provides a method for operating a floating offshore hydrogen-based energy production platform, comprising the following steps:

[0178] The production platform is driven by the auxiliary thruster 12 to bring the target mooring components into a relaxed state.

[0179] By controlling the anchor chain connection release device 14, the upper mooring cable 13 is separated and unlocked from the lower anchor chain 15;

[0180] By controlling the quick-plug device 17, the dynamic cable 21 is disconnected and the end is sealed;

[0181] After repeating the process to detach all mooring components, the production platform is towed away by an external towing vessel.

[0182] In this working method, the steps include propulsion slack, anchor chain unlocking, cable insertion and removal, and towing evacuation. Specifically, propulsion slack ensures that all mooring components have zero tension, avoiding elastic rebound at the moment of unlocking. This method relies on the cooperation of auxiliary propulsion 12, anchor chain connection release device 14, and quick insertion and removal device 17, requiring no divers or ROV throughout the process, and providing rapid platform evacuation efficiency. This method is suitable for platforms with multiple mooring components, providing a safe evacuation mode for offshore hydrogen-based energy clusters during typhoon season.

[0183] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An easily detachable floating offshore hydrogen-based energy production platform, characterized in that, include: The platform body (1) and the floating body foundation (11) are anchored to the seabed by a mooring system. The mooring system includes at least one mooring component, which includes an upper mooring cable (13), an anchor chain connection and release device (14), and a lower anchor chain (15) connected in series. The upper mooring cable (13) is fixedly connected to the floating body foundation (11), and the lower anchor chain (15) is adapted to be fixed to the seabed. A quick-plug device (17) and a dynamic cable (21) are installed between the platform body (1) and the dynamic cable (21), and the platform body (1) is connected to the offshore wind farm (31) through the dynamic cable (21). An auxiliary thruster (12) is installed on one side wall of the floating body base (11) for positioning and movement adjustment during platform release.

2. The floating offshore hydrogen-based energy production platform according to claim 1, characterized in that, The anchor chain connection release device (14) includes: The buoy module (32) adjusts the buoyancy by buoy inlet and outlet to adjust the position of the lower anchor chain (15); The hydraulic buckle module (34) has a first snap-fit ​​end connected to the upper mooring cable (13) and a second snap-fit ​​end connected to the lower anchor chain (15), with the first snap-fit ​​end and the second snap-fit ​​end being snap-fitted together. The control system is adapted to remotely control the connection locking and unlocking between the first locking end and the second locking end of the hydraulic buckle module (34).

3. The floating offshore hydrogen-based energy production platform according to claim 2, characterized in that, The anchor chain connection release device (14) further includes a transfer module (33), one end of which is fixedly connected to the float module (32), and the other end is fixedly connected to the hydraulic buckle module (34).

4. The floating offshore hydrogen-based energy production platform according to claim 1, characterized in that, The quick-plug device (17) includes: The socket assembly is fixedly installed on the floating offshore platform; A plug assembly is fixedly installed at the end of the dynamic cable and is adapted to be sealed and disconnected from the socket assembly; The socket assembly includes a socket housing (101), a socket base (107), multiple electrical pins (104), and a socket oil bladder (105); the socket base (107) is fixedly disposed inside the socket housing (101) and has multiple through holes (102) thereon; the electrical pins (104) are correspondingly fixedly disposed inside the through holes (102), and the outer diameter of the electrical pins (104) is larger than the diameter of the through holes (102) to achieve an interference fit; the socket oil bladder (105) is embedded in the socket base (107), and the internal cavity of the socket housing (101) is filled with insulating oil; The plug assembly includes a plug housing (108), a plug base (113), multiple sockets (110), and a plug oil bladder (111); the plug base (113) is fixedly disposed inside the plug housing (108), the sockets (110) are fixedly disposed inside the plug base (113), and the sockets (110) are respectively disposed in correspondence with the electrical pins (104) of the socket assembly; the plug oil bladder (111) is disposed inside the plug housing (108), and the internal cavity of the plug housing (108) is filled with insulating oil; When the plug assembly is mated with the socket assembly, the electrical pin (104) is inserted into the corresponding socket (110) to achieve electrical connection, and the entire electrical connection part after mating can be immersed in insulating oil.

5. The floating offshore hydrogen-based energy production platform according to claim 4, characterized in that, The socket assembly also includes a socket sealing kit (103), which is disposed at the port of the socket housing (101) for forming a seal with the plug housing (108) during mating; The plug assembly also includes a plug sealing kit (109) disposed at a port of the plug housing (108) for forming a seal with the socket housing (101) during mating.

6. The floating offshore hydrogen-based energy production platform according to claim 5, characterized in that, The plug assembly also includes a removably disposed sealing cap (114) adapted to engage with the plug sealing kit (109) after the plug assembly is separated from the socket assembly.

7. The floating offshore hydrogen-based energy production platform according to claim 4, characterized in that, The socket assembly further includes at least one return spring (106) disposed within the socket housing (101) for providing preload to the socket oil bladder (105) to compensate for internal pressure; and / or; The plug assembly also includes a cable outlet (112), which is fixedly disposed at the tail of the plug housing (108) for fixing and sealing the dynamic cable.

8. The floating offshore hydrogen-based energy production platform according to claim 4, characterized in that, The quick-plug device (17) is provided with a flange (18), and a first bend limiter (19) and a second bend limiter (20) are connected to the fixed port of the flange (18). The dynamic cable (21) passes through the first bend limiter (19) and the second bend limiter (20).

9. The floating offshore hydrogen-based energy production platform according to claim 1, characterized in that, The floating offshore hydrogen-based energy production platform also includes: A static cable (27) and a dynamic cable (21) are electrically connected through a static and dynamic cable junction box (26). The end of the static cable (27) away from the dynamic cable (21) is connected to the offshore wind farm (31). The submarine fixing system (24) has a first fixing end fixed to the dynamic cable (21) and a second fixing end fixed to the seabed. The submarine fixing system (24) and the dynamic and static cable junction box (26) are spaced apart.

10. The floating offshore hydrogen-based energy production platform according to claim 9, characterized in that, Abrasion-resistant protective tube (25) is fitted on the dynamic cable (21) between the submarine fixing system (24) and the dynamic and static cable junction box (26); and / or; The static cable (27) is provided with a bend limiter (28) and a positioning element (29) at the end away from the dynamic cable (21). A J-tube (30) is installed on the offshore wind farm (31). The static cable (27) passes through the bend limiter (28), the positioning element (29) and the J-tube (30) in sequence to connect with the wind turbine cable of the offshore wind farm (31); and / or; The dynamic cable (21) is equipped with several gravity blocks (22) suitable for increasing the counterweight on the dynamic cable (21) and several buoyancy blocks (23) suitable for providing buoyancy to the dynamic cable (21) so that the dynamic cable (21) is arranged in a wave pattern.

11. The floating offshore hydrogen-based energy production platform according to claim 1, characterized in that, The mooring assembly also includes a holding anchor (16), which is fixedly disposed at the end of the lower anchor chain (15) away from the anchor chain connection release device (14).

12. The floating offshore hydrogen-based energy production platform according to any one of claims 1-11, characterized in that, The platform body (1) has a three-layer structure; The upper layer of the platform body (1) is equipped with an energy storage system (2), a chemical synthesis system (3) and a hydrogen production system (4). The hydrogen production system (4) is used to receive high-purity fresh water transported from the lower layer and electrolyze it to produce hydrogen. The hydrogen is transported to the chemical synthesis system (3) to synthesize chemical products. The energy storage system (2) is used to store chemical products. The middle layer of the platform body (1) is provided with an electrochemical energy storage system (5) and a raw material gas generator (6), which is used to provide nitrogen and raw material gas to the hydrogen production system (4). The lower layer of the platform body (1) is equipped with an electrical system (7) and a seawater desalination system (8). The electrical system (7) is used to provide electrical energy. The seawater desalination system (8) extracts seawater through an extraction pipe (9) and outputs high-purity fresh water to the hydrogen production system (4). Concentrated seawater is discharged through a discharge pipe (10).

13. A method of operating a floating offshore hydrogen-based energy production platform as described in any one of claims 1-12, characterized in that, Includes the following steps: The production platform is driven by the auxiliary thruster (12) to make the target mooring assembly relax. By controlling the anchor chain connection release device (14), the upper mooring cable (13) is separated and unlocked from the lower anchor chain (15); By controlling the quick-plug device (17), the dynamic cable (21) is disconnected and the end is sealed; After repeating the process to detach all mooring components, the production platform is towed away by an external towing vessel.

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