Multifunctional wharf structure and construction method thereof

Abstract

The invention relates to a multifunctional wharf structure. The core of the device is composed of a hydrogen storage buoyancy tank, a storage buoyancy tank and a hydrogen energy conversion assembly. A double-layer heat insulation hydrogen storage cabin with a vacuum interlayer is integrated in the hydrogen storage buoyancy tank, a hydrogen storage cabin filling port is formed in the bottom, the top is connected with a telescopic filling mechanical arm through a hydrogen pipeline via a high-pressure branching device, a ship / vehicle self-aligning adapter substitute is arranged at the tail end of the mechanical arm, and hydrogen can be conveniently filled into ships and vehicles. An annular goods shelf, a storage elevator and an annular conveying belt are arranged in the storage buoyancy tank and used for storing and transporting goods. The hydrogen energy conversion assembly is located at the top of the hydrogen storage buoyancy tank, the hydrogen driving turbine is connected with the three-stage gearbox through a spline shaft, and an output shaft of the hydrogen driving turbine drives the storage lifter, the annular conveying belt and the vacuum pump set. The hydrogen storage buoyancy tank and the storage buoyancy tank are connected to form a floating platform, and a hydrogen storage cabin filling port is communicated with a shore-based hydrogen supply system through a hydrogen conveying pipeline. The multifunctional wharf structure is diversified in function, high in integration level and good in application prospect.

Description

Technical Field

[0001] The present invention relates to the field of wharf construction. More specifically, the present invention relates to a multi-functional wharf structure and a construction method thereof. Background Art

[0002] With the increasing global emphasis on low-carbon environmental protection and sustainable development, hydrogen energy, as a clean and efficient secondary energy source, has shown a booming development trend in the field of transportation. Hydrogen energy ships, with the advantages of zero emissions and strong endurance, have become an important direction for the green transformation of inland and coastal shipping; hydrogen fuel cell vehicles also have growing application demands in fields such as port logistics and heavy machinery due to their short refueling time and long driving range. However, the current infrastructure construction of traditional wharves is difficult to meet the operation requirements of transportation tools in the hydrogen energy era, and there are significant deficiencies in the storage, refueling, and comprehensive utilization of hydrogen energy.

[0003] From the perspective of energy supply, existing wharves generally lack specialized hydrogen fuel storage and refueling facilities. The fuel supply system of traditional wharves is mainly designed for conventional energy sources such as diesel and gasoline. For a special fuel like hydrogen that needs to be stored in a low-temperature and high-pressure environment, there is neither a double-insulated hydrogen storage tank with a vacuum interlayer to ensure the stable storage of hydrogen nor refueling equipment that can accommodate different interfaces for ships and vehicles. In terms of supporting logistics warehousing, there are obvious shortcomings in the connection between the cargo handling system of existing wharves and the hydrogen energy industrial chain. The operation of hydrogen energy ships and vehicles requires a large number of supporting parts, energy storage devices, and supply materials, while the warehousing facilities of traditional wharves mostly have a flat layout and lack a three-dimensional and automated warehousing system. Analyzing from the perspective of energy utilization efficiency, the power system of existing wharves is disconnected from the hydrogen energy industrial chain. The loading and unloading equipment and warehousing machinery of wharves usually rely on the power grid or diesel generators to provide power, which not only increases the operating cost but also causes inefficient energy utilization. For hydrogen, the core reserve energy of wharves, existing facilities have not established an energy recycling system, and cannot organically combine the hydrogen storage system with the power system, resulting in ineffective recovery of the energy loss during the storage and transmission of high-pressure hydrogen, and also unable to provide power for the warehousing equipment of the wharf itself through energy conversion. In addition, the fixed structure of traditional wharves is difficult to adapt to complex water environments. In areas with frequent tidal changes and large water level fluctuations, the hydrogen storage equipment and refueling pipelines of fixed wharves are easily affected by water level changes, posing safety hazards; in the modular design of existing floating wharves, there is a lack of a systematic solution for organically integrating the hydrogen storage function with the warehousing function. The hydrogen storage unit and the warehousing unit operate independently, unable to form a synergy effect, resulting in low overall space utilization rate and high construction cost of the wharf. In summary, the existing terminals have many technical bottlenecks in hydrogen energy storage and refueling, supporting warehousing and logistics, energy recycling, environmental adaptability, and hydrogen energy driving functions, which makes it difficult to meet the needs of large-scale application of hydrogen energy ships and vehicles. How to build a multifunctional terminal structure that integrates efficient hydrogen storage, intelligent refueling, automated warehousing, and energy recycling has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0006] Another object of the present invention is to provide a multifunctional dock structure that can achieve efficient refueling of hydrogen-powered ships and vehicles, is equipped with automated warehousing, is driven by hydrogen energy, improves energy utilization efficiency, and adapts to the water environment.

[0007] In order to achieve these objects and other advantages according to the present invention, there is provided a multifunctional dock structure comprising: A hydrogen storage buoy, which has a double-layer insulated hydrogen storage tank with a vacuum interlayer integrated therein, a hydrogen storage tank filling port is provided at the bottom of the double-layer insulated hydrogen storage tank, and a hydrogen pipeline is provided at the top, the hydrogen pipeline is connected to the insulated pipeline through a high-pressure splitter, the end of the insulated pipeline is connected to a telescopic filling mechanical arm, and the end of the telescopic filling mechanical arm is equipped with a ship or vehicle self-conversion joint; A storage pontoon, wherein an annular shelf and a storage elevator matching the shelf are arranged inside, and an annular conveyor belt is arranged at the inner edge of the annular shelf; A hydrogen energy conversion assembly is arranged on the top of the hydrogen storage pontoon, and comprises a hydrogen driven turbine connected to the high-pressure splitter, the hydrogen driven turbine is connected to a three-stage gearbox through a spline shaft, the first output shaft of the three-stage gearbox is connected to the storage elevator drive gear of the adjacent storage pontoon, the second output shaft is connected to the annular conveyor belt drive wheel, and the third output shaft is connected to the vacuum pump group of the vacuum interlayer; The hydrogen storage pontoon and the storage pontoon are connected to form a floating platform of a multi-functional wharf, and the hydrogen storage pontoon is located on the outside and the storage pontoon is located on the inside. A hydrogen pipeline is provided at the filling port of the hydrogen storage tank. The hydrogen pipelines of adjacent hydrogen storage tanks are connected by flanges, and the hydrogen pipelines at the ends are connected to the shore-based hydrogen supply system.

[0008] Preferably, a first pile and a second pile penetrating into the seabed are respectively provided at the bottom of the hydrogen storage pontoon and the storage pontoon, the top of the second pile extends into the storage pontoon, and a vertical rack guide meshing with a storage elevator drive gear is provided on the outside of the section of the second pile located in the storage pontoon, and the storage elevator drive gear and the ring conveyor belt drive wheel are both arranged close to the side of the hydrogen storage pontoon.

[0009] Preferably, a loading and unloading port facing the second pile column is provided on the surface of the storage floating box, and the loading and unloading port is equipped with a push-pull type cover plate.

[0010] Preferably, a corrugated steel isolation curtain is provided at the contact between the hydrogen storage floating box and the storage floating box. The corrugated steel isolation curtain is compounded with a hydrogen barrier functional layer. The hydrogen barrier functional layer is arranged on the side of the hydrogen storage floating box and includes alternately stacked graphene oxide films and nano-ceramic coatings, and its hydrogen permeability ≤ 1×10 -12 cm 2 / (s·Pa); a corrugated carbon fiber truss is provided at the contact between the storage floating box and the storage floating box, and the corrugated carbon fiber truss is filled with polyurethane foam inside.

[0011] Preferably, the double-layer adiabatic hydrogen storage tank includes an inner tank and an outer cover. A 10-15 mm vacuum interlayer is formed between the inner tank and the outer cover. The vacuum interlayer is connected to a vacuum pump group to maintain the vacuum degree in the vacuum interlayer ≤ 1 Pa. A pressure sensing film is provided in the vacuum interlayer. When the vacuum degree in the vacuum interlayer > 10 Pa, the onshore warning bell is linked to give an early warning.

[0012] Preferably, a solenoid valve is provided at the hydrogen filling port of the hydrogen storage tank, and an annular hydrogen concentration sensor array is provided around the hydrogen filling port of the hydrogen storage tank. A mechanical emergency cut-off valve is provided on the end hydrogen pipeline. When any hydrogen concentration sensor detects that the hydrogen concentration > 1% LEL, the solenoid valve corresponding to the hydrogen concentration sensor is closed and the onshore warning bell is linked to give an early warning. The mechanical emergency cut-off valve needs to be manually reset before it can be restarted.

[0013] Preferably, the onshore warning bell is provided with a hierarchical early warning module: When the vacuum degree of the vacuum interlayer > 10 Pa, a first-level early warning is triggered. The onshore warning bell intermittently rings at a frequency of 0.5 Hz and activates a yellow rotating warning light; When any hydrogen concentration sensor detects that the hydrogen concentration > 1% LEL, a second-level early warning is triggered. The onshore warning bell continuously beeps and activates a red strobe light, and at the same time, the flange connection of the hydrogen pipeline between adjacent hydrogen storage floating boxes is cut off.

[0014] Preferably, the flange connection of the hydrogen pipeline is coated with a self-expanding fireproof layer. The fireproof layer is composed of a silicon carbide fiber braid and aerogel, and a microencapsulated perfluoromethyl hexanone fire extinguishing agent is embedded in the fireproof layer. When the second-level early warning is triggered and the temperature > 80 °C, the fireproof layer expands by heat to release the fire extinguishing agent, forming a local inerting protection area.

[0015] The present invention further claims to protect the construction method of the multi-functional wharf structure, including: Step 1: Use marine corrosion-resistant steel to weld the hydrogen storage pontoon shell and the storage pontoon shell, integrate a double-layer insulated hydrogen storage cabin with a vacuum interlayer inside the hydrogen storage pontoon, and provide a hydrogen storage cabin filling port at the bottom and a hydrogen pipeline at the top of the double-layer insulated hydrogen storage cabin; set an annular shelf and a storage elevator matching the shelf on the storage pontoon, and provide an annular conveyor belt at the inner edge of the annular shelf; Step 2: Use marine geological radar to scan the seabed to determine the penetration depth of the first pile and the second pile, where the penetration depth of the sandy seabed is ≥8m and the penetration depth of the muddy seabed is ≥15m; Step 3: Use a semi-submersible barge to transport the hydrogen storage pontoon and the storage pontoon to the pile position, and use the GPS-RTK positioning system to guide the hydrogen storage pontoon and the storage pontoon to sink and dock with the corresponding piles. The flange connection of the hydrogen pipeline of adjacent hydrogen storage pontoons adopts a shrink fit assembly process, and an interference fit is formed after natural cooling; Step 4. Install a hydrogen pipeline on the top of the hydrogen storage pontoon. The hydrogen pipeline is connected to the insulation pipeline and the hydrogen-driven turbine respectively through a high-pressure splitter. The end of the insulation pipeline is connected to a telescopic filling robotic arm. The end of the telescopic filling robotic arm is equipped with a ship and vehicle self-conversion joint; the hydrogen-driven turbine is connected to a three-stage gearbox through a spline shaft. The first output shaft of the three-stage gearbox is connected to the storage elevator drive gear of the adjacent storage pontoon, the second output shaft is connected to the ring conveyor belt drive wheel, and the third output shaft is connected to the vacuum pump group of the vacuum interlayer.

[0016] The present invention has at least the following beneficial effects: First, the multifunctional wharf structure provided by the present invention realizes the rapid switching of hydrogen fuel filling for ships and vehicles through the telescopic filling mechanical arm and the self-converting joint, thus solving the limitation of single-carrier filling at traditional wharfs; the hydrogen energy conversion component distributes the mechanical energy of the high-pressure hydrogen-driven turbine to the storage elevator, the circular conveyor belt and the vacuum pump group, thus constructing a hydrogen energy self-circulation system of "hydrogen storage-energy use-energy control", reducing the wharf's dependence on external electricity, and improving the wharf's energy self-sufficiency rate and utilization efficiency; Secondly, the vertical rack guide rail on the outside of the second pile column in the multifunctional wharf structure provided by the present invention is meshed with the gear of the storage elevator, and cooperates with the winch system driven by hydrogen energy to achieve stable vertical movement of the elevator, thereby improving the efficiency of storage and retrieval of storage materials; the design of the pile column penetrating the seabed enhances the wind and wave resistance of the floating platform and adapts to the water environment with frequent tidal changes; Thirdly, the loading and unloading port on the surface of the storage pontoon in the multifunctional wharf structure provided by the present invention is equipped with a push-pull cover plate, which is convenient for direct loading and unloading of large materials through the pile column area, and forms a three-dimensional logistics channel with the circular conveyor belt and storage elevator, shortening the material turnover path and improving the wharf storage operation efficiency; Fourthly, in the multi-functional wharf structure provided by the present invention, the hydrogen barrier functional layer of the corrugated steel isolation curtain effectively prevents hydrogen leakage from the hydrogen storage floating tank to the storage area; the corrugated carbon fiber truss is filled with polyurethane foam, which has both light weight and high strength and heat insulation performance, improving the impact resistance and environmental adaptability of the connecting part of the floating tank; Fifthly, the solenoid valve at the hydrogen filling port of the hydrogen storage tank in the multi-functional wharf structure provided by the present invention is linked with the annular hydrogen concentration sensor array. When the detected hydrogen concentration > 1% LEL, the corresponding solenoid valve is accurately closed and a warning is triggered. Cooperating with the mechanical emergency cut-off valve (manual reset required) at the end of the hydrogen transmission pipeline, a three-level protection of "detection - cut-off - warning" is formed to reduce the safety hazards caused by hydrogen leakage; the self-expanding fireproof layer (composite of silicon carbide fiber and aerogel) at the flange of the hydrogen transmission pipeline is embedded with perfluoroketone fire extinguishing agent. When the secondary warning is given and the temperature > 80°C, the fireproof layer expands to release the fire extinguishing agent to form an inert protection area, inhibiting the hydrogen combustion reaction, providing high-temperature resistant and self-starting passive fire protection for the high-pressure hydrogen transmission system, and enhancing the fire safety level of the wharf; through the vacuum-insulated hydrogen storage tank, the hydrogen barrier functional layer and the hierarchical warning mechanism, combined with the annular hydrogen concentration sensor and the self-expanding fireproof layer, the hydrogen leakage and explosion risk are effectively inhibited. The dual warnings of vacuum degree monitoring (≤1Pa) and concentration threshold (>1%LEL), combined with automatic cut-off and inert protection, ensure the safety of the hydrogen storage and filling process.

[0017] Other advantages, objectives and features of the present invention will be partially reflected by the following description, and partially will be understood by those skilled in the art through the research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a distribution schematic diagram of the storage floating tank and the hydrogen storage floating tank in one technical solution of the present invention; Figure 2 It is a schematic diagram of the multi-functional wharf structure in another technical solution of the present invention; Figure 3 It is a schematic diagram of the structure of the hydrogen storage floating tank in another technical solution of the present invention; Among them, 1, shore base; 2, hydrogen storage floating tank; 3, storage floating tank; 4, shore-based hydrogen supply system; 5, shore-based warning bell; 201, hydrogen pipeline; 202, telescopic filling robotic arm seat; 203, hydrogen-driven turbine; 204, high-pressure splitter; 21, hydrogen storage floating tank shell; 22, double-layer adiabatic hydrogen storage tank; 23, hydrogen transmission pipeline; 24, flange; 25, first pile column; 301, second pile column; 302, loading and unloading port. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following further detailed description of the present invention is made in conjunction with the accompanying drawings, so that those skilled in the art can implement it according to the description in the specification.

[0020] It should be understood that terms such as "having", "comprising", and "including" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0021] As Figures 1 - 3 shown, the present invention provides a multi-functional wharf structure, including: A hydrogen storage floating tank 2, which internally integrates a double-layer adiabatic hydrogen storage chamber 22 with a vacuum interlayer. A hydrogen storage chamber filling port is provided at the bottom of the double-layer adiabatic hydrogen storage chamber 22, and a hydrogen pipeline 201 is provided at the top. The hydrogen pipeline 201 is connected to an adiabatic pipeline through a high-pressure splitter 204. The end of the adiabatic pipeline is connected to a telescopic filling robotic arm, and a ship-vehicle self-aligning conversion joint is configured at the end of the telescopic filling robotic arm; A storage floating tank 3, which internally is provided with an annular shelf and a storage elevator supporting the shelf. An annular conveyor belt is provided at the inner edge of the annular shelf; A hydrogen energy conversion assembly, which is arranged on the top of the hydrogen storage floating tank 2. It includes a hydrogen-driven turbine 203 connected to the high-pressure splitter 204. The hydrogen-driven turbine 203 is connected to a three-stage gearbox through a spline shaft. The first output shaft of the three-stage gearbox is connected to the storage elevator drive gear of the adjacent storage floating tank 3, the second output shaft is connected to the annular conveyor belt drive wheel, and the third output shaft is connected to a vacuum pump group of the vacuum interlayer; Wherein, the hydrogen storage floating tank 2 and the storage floating tank 3 are connected to form a floating platform of the multi-functional wharf, and the hydrogen storage floating tank 2 is located on the outside and the storage floating tank 3 is located on the inside. A hydrogen transmission pipeline 23 is provided at the hydrogen storage chamber filling port. The hydrogen transmission pipelines 23 of adjacent hydrogen storage chambers are connected through a flange 24, and the end hydrogen transmission pipeline 23 communicates with the onshore hydrogen supply system 4.

[0022] In the above technical solution, as Figure 1 or Figure 2 shown, the hydrogen storage floating tank 2 and the storage floating tank 3 adopt a splicing design. The hydrogen storage floating tank 2 and the storage floating tank 3 are connected through high-strength flexible connectors, such as rubber shock isolation joints or articulated structures, to form an expandable floating platform. The hydrogen storage floating tank 2 is arranged on the outside to form a safety barrier, and the storage floating tank 3 is arranged as an operation area on the inside. The hydrogen storage floating tank 2 internally integrates a double-layer adiabatic hydrogen storage chamber 22. The double-layer adiabatic hydrogen storage chamber 22 adopts a vacuum interlayer structure. The inner layer is made of high-strength low-temperature-resistant materials, such as stainless steel or aluminum alloy, and the outer layer is an adiabatic insulation layer. The interlayer is evacuated to isolate heat conduction to ensure the stable storage of hydrogen under low temperature and high pressure. A hydrogen storage chamber filling port is provided at the bottom of the double-layer adiabatic hydrogen storage chamber 22, and it is connected to the hydrogen transmission pipeline 23 of the adjacent hydrogen storage floating tank 2 through a flange 24 to form a series hydrogen supply network. The end hydrogen transmission pipeline 23 communicates with the onshore hydrogen supply system 4, as Figure 1As shown in the figure, multiple hydrogen supply paths can be merged near the shore base 1 and then connected to the shore-based hydrogen supply system 4 through quick connectors to achieve centralized hydrogen supply. To ensure the stability of the double-layer adiabatic hydrogen storage tank 22, multiple reinforcing ribs can also be provided between the hydrogen storage floating tank shell 21 and the double-layer adiabatic hydrogen storage tank 22. The hydrogen pipeline 201 at the top of the double-layer adiabatic hydrogen storage tank 22 is connected to the high-pressure splitter 204. On the one hand, high-pressure hydrogen is distributed to the adiabatic pipeline. The adiabatic pipeline uses vacuum insulation or cryogenic insulation materials to reduce energy loss during hydrogen transportation. The telescopic filling robotic arm at the end of the adiabatic pipeline is arranged on the telescopic filling robotic arm seat 202, which has the ability of multi-degree-of-freedom movement, such as telescoping, rotating, and pitching, and can adapt to the hydrogen filling ports of ships or vehicles at different heights and positions; the self-aligning conversion joint at the end of the robotic arm integrates an intelligent alignment system, such as electromagnetic induction, to automatically match different specifications of hydrogen filling interfaces, such as large-flow interfaces for ships and standard interfaces for vehicles, to achieve rapid and leak-free connection.

[0023] In the above technical solution, a ring-shaped shelf and a ring-shaped conveyor belt are provided inside the storage floating tank 3. The shelf adopts a multi-layer ring-shaped steel structure. A ring-shaped conveyor belt is arranged on the inner edge of any layer of the ring-shaped shelf. The conveyor belt is made of wear-resistant rubber or metal chain plate and can rotate bidirectionally to achieve efficient cyclic transportation of goods. The ring-shaped shelves are connected by a storage elevator. The elevator is equipped with an intelligent scheduling system that automatically plans the path according to the storage location and demand of the goods to improve the access efficiency. At the same time, a robotic arm for mechanical docking with the ring-shaped shelf or the cargo ship is equipped on the elevator.

[0024] In the above technical solution, the hydrogen-driven turbine 203 adopts an axial-flow or radial-flow turbine. The high-pressure hydrogen expands to do work to drive the spline shaft to rotate. The spline shaft is connected to a three-stage gearbox, and the power is distributed to three output shafts through a gear set with different tooth ratios. The first output shaft is connected to the drive gear of the storage elevator to drive the elevator to move up and down. The second output shaft is connected to the drive wheel of the ring-shaped conveyor belt to control the rotation speed and direction of the conveyor belt. The third output shaft is connected to the vacuum pump group in the vacuum interlayer to maintain the vacuum degree of the hydrogen storage tank and ensure the adiabatic performance. As a preference, the low-pressure hydrogen discharged from the turbine can be recycled to the shore base 1 system or used for other auxiliary equipment (such as a fuel cell emergency power supply) to achieve efficient energy utilization.

[0025] In the above technical solution, a working process of the multi-functional wharf structure is as follows: Hydrogen supply and hydrogen storage process: When the hydrogen storage floating tank 2 needs to be replenished with hydrogen, the end hydrogen transmission pipeline 23 is connected to the onshore hydrogen supply system 4 through the flange 24. High-pressure hydrogen on the onshore side 1 enters the hydrogen storage tank filling port through the hydrogen transmission pipeline 23, and fills the double-layer adiabatic hydrogen storage tank 22 with liquid or high-pressure gaseous hydrogen; the vacuum degree of the vacuum interlayer of the hydrogen storage tank is maintained below 10-3 Pa, effectively isolating external heat and reducing hydrogen evaporation loss. The hydrogen in the hydrogen storage tank converges into the high-pressure splitter 204 through the top hydrogen pipeline 201, and the splitter distributes the hydrogen to two main paths: part of the high-pressure hydrogen enters the hydrogen-driven turbine 203 and drives the turbine to rotate through expansion work; the remaining hydrogen is transported to the telescopic filling robotic arm through the adiabatic pipeline and waits for refueling of ships or vehicles.

[0026] Hydrogen refueling operation process for ships / vehicles: When a ship or vehicle docks at the wharf, the telescopic filling robotic arm installed outside the hydrogen storage floating tank 2 is activated. It identifies the position of the target hydrogen refueling port through lidar or visual cameras, and the robotic arm body (with 3 rotational degrees of freedom + 2 telescopic degrees of freedom) adjusts its posture to make the self-aligning conversion joint at the end approach the interface; the conversion joint is equipped with electromagnetic induction or mechanical probes to automatically match the large-flow refueling port of the ship, generally a DN50 flange 24 interface, or the standard hydrogen refueling port of the vehicle, generally an ISO19880-2 interface, and realizes quick sealing connection through the sealing ring and locking mechanism. High-pressure hydrogen enters the target carrier through the adiabatic pipeline, and the pressure, flow rate, and temperature are monitored in real time by the wharf control system during the refueling process to avoid overfilling; after the refueling is completed, the robotic arm automatically disconnects the joint and resets. The robotic arm can also be an artificial robotic arm, and the hydrogen refueling operation for ships / vehicles is completed manually.

[0027] Cargo handling process of the storage floating tank 3: The quay crane hoists the container or bulk cargo to the loading and unloading platform on the top of the storage floating tank 3. The cargo enters the ring-shaped shelf area through the elevator entrance. The storage elevator (driven by the first output shaft of the hydrogen energy conversion component) transports the cargo to the designated shelf layer according to the instructions of the central control system. The ring-shaped conveyor belt (driven by the second output shaft) rotates and pushes the cargo to the storage grid at the inner edge of the shelf. After the sensor confirms the positioning, it automatically locks. When receiving the outbound instruction, the conveyor belt on the corresponding shelf layer rotates in the reverse direction, transports the cargo to the elevator entrance, and then the manipulator transfers the cargo to the elevator; the elevator lifts the cargo to the loading and unloading platform, which is transferred to the ship by the quay crane or to the port vehicle by a forklift; in this process, the three-stage gearbox dynamically matches the conveyor belt speed and the elevator lifting rate through frequency conversion speed regulation technology to avoid cargo accumulation. The improvement of the present invention for the multi-functional wharf structure does not specifically elaborate on the process of wharf intelligent control.

[0028] According to the above technical solution, the multi-functional wharf structure integrates multiple functions and adapts to multiple scenarios. The telescopic robotic arm and the self-aligning conversion joint realize the integration of hydrogen refueling for different carriers such as ships and vehicles, without the need for additional adaptation equipment, improving the versatility of the wharf. The combination of the ring-shaped shelf, the ring-shaped conveyor belt and the storage elevator forms an efficient cargo storage - transportation system, which is suitable for the turnover of high-frequency and multi-category goods in port logistics. The hydrogen energy conversion component directly uses the high-pressure hydrogen in the hydrogen storage tank as the power source to drive the storage system and the vacuum maintenance equipment, reducing the dependence on external power and lowering the operating cost. The vacuum interlayer design of the double-layer adiabatic hydrogen storage tank 22 greatly reduces the hydrogen evaporation rate, ensuring long-term storage stability; the vacuum pump group is driven by a turbine to maintain the vacuum degree in real time, avoiding the energy consumption and failure risks of traditional electric pumps. At the same time, the hydrogen storage floating tank 2 is located on the outside, forming a peripheral barrier, isolated from the inner storage area, reducing the impact of potential hydrogen leakage on the stored goods; the vacuum interlayer and the adiabatic pipeline reduce the hydrogen temperature fluctuation and suppress the accident risk. Adjacent floating tanks are quickly assembled through flanges 24 and flexible connectors, and the hydrogen storage capacity and storage space can be flexibly expanded according to the port scale to adapt to future business growth. In summary, through the organic integration of the three major modules of hydrogen storage, storage, and energy conversion, this technical solution realizes the integrated operation of hydrogen energy storage, refueling, and logistics, with the characteristics of functional diversity, energy efficiency, safety and reliability, and environmental friendliness, providing an innovative solution for the coordinated development of future green ports and the hydrogen energy industrial chain.

[0029] In one of the technical solutions, the bottom of the hydrogen storage floating tank 2 and the storage floating tank 3 are respectively provided with a first pile column 25 and a second pile column 301 that penetrate to the seabed. The top of the second pile column 301 extends into the storage floating tank 3, and a vertical rack guide rail meshing with the driving gear of the storage elevator is provided on the outer side of the section of the second pile column 301 located in the storage floating tank 3. The driving gear of the storage elevator and the driving wheel of the ring-shaped conveyor belt are both arranged close to the hydrogen storage floating tank 2 side.

[0030] In the above technical solution, the first pile column 25 at the bottom of the hydrogen storage floating tank 2 is a steel pipe pile with a diameter of 1.5 meters, the surface is coated with an epoxy resin anti-corrosion layer, the pile body penetrates the seabed, and is fixed by concrete grouting, and can withstand a horizontal load ≥500kN. The second pile column 301 at the bottom of the storage floating tank 3 is an H-shaped steel structure pile, the top extends into the storage floating tank 3, and a vertical rack guide rail is welded on the outer side of the section located in the tank body. The vertical rack guide rail is made of 42CrMo quenched steel, with a module of 10 and a tooth pitch of 31.4mm; the guide rail is vertically arranged along the axis of the pile column, and the straightness error ≤0.1mm / m. After the first pile column 25 and the second pile column 301 are accurately positioned and installed, the verticality deviation of the pile column ≤0.1°, ensuring that the rack guide rail is perpendicular to the horizontal plane. The pile column system limits the horizontal displacement of the platform within ±0.3 meters (the mooring system is usually ±2 meters), adapting to severe sea conditions with a wave height ≤4 meters.

[0031] In the above technical solution, the driving gears are installed on both sides of the frame of the warehousing elevator, with 24 teeth, and form a high-precision meshing with the rack guide (the side clearance ≤ 0.2 mm). The gear shafts are fixed by spherical roller bearings and can withstand an axial load of 50 kN. The first output shaft of the three-stage gearbox is connected to the driving gear shaft through a drum-shaped tooth coupling, transmitting a torque ≥ 2000 N·m. The output speed of the gearbox is 50 rpm. After deceleration by the gear rack, it controls the stable lifting speed of the elevator. The driving gears of the warehousing elevator and the driving wheels of the annular conveyor belt are both arranged close to the side of the hydrogen storage floating tank 2, and are connected to the output shaft of the three-stage gearbox through short shafts, reducing the length of the transmission chain and improving the mechanical efficiency. The driving wheels adopt a double sprocket structure (meshing with the annular conveyor belt chain), and the center distance error of the sprockets ≤ 0.5 mm, ensuring the stable operation of the conveyor belt.

[0032] In the above solution, the hydrogen-driven turbine 203 is connected to the three-stage gearbox through a spline shaft. The speed ratio of the three-stage gearbox for power distribution to the first output shaft is 1:4, driving the driving gears of the warehousing elevator to achieve meshing transmission of the driving gears; the speed ratio of the second output shaft is 1:3, driving the driving wheels of the annular conveyor belt, and the speed ratio of the third output shaft is 1:6, driving the vacuum pump group to maintain the vacuum degree of the hydrogen storage tank.

[0033] According to the above technical solution, the pile column fixation replaces the traditional mooring, and can withstand a wind speed ≥ 32.7 m / s and a wave height ≥ 5 meters, avoiding the misalignment failure of the filling robotic arm caused by the platform drift, especially suitable for deep-sea offshore terminals. At the same time, the annular shelves are arranged around the second pile column 301, improving the floor area ratio and meeting the high-density warehousing requirements.

[0034] In one of the technical solutions, a loading and unloading port 302 facing the second pile column 301 is provided on the surface of the warehousing floating tank 3, and the loading and unloading port 302 is equipped with a push-pull cover plate. The loading and unloading port 302 is located at the center of the surface of the warehousing floating tank 3 (facing the second pile column 301), and the annular shelves can be symmetrically distributed around the pile column, improving the floor area ratio. After the goods enter through the loading and unloading port 302, they can be quickly distributed to each layer of the shelves by the elevator, realizing an efficient warehousing mode of "central vertical input + annular horizontal distribution". The push-pull cover plate is driven by electro-hydraulics and can operate stably under sea conditions with a wave height ≤ 2 meters. When the cover plate is closed, it is flush with the surface of the warehousing floating tank 3, and the surface is coated with an anti-slip coating to avoid the risk of personnel tripping, and at the same time reduce the corrosion caused by seawater retention.

[0035] In one of the technical solutions, a corrugated steel isolation curtain is provided at the contact between the hydrogen storage floating tank 2 and the warehousing floating tank 3. The corrugated steel isolation curtain is compounded with a hydrogen barrier functional layer, and the hydrogen barrier functional layer is arranged on the side of the hydrogen storage floating tank 2. It includes an alternately stacked graphene oxide film and a nano-ceramic coating, and its hydrogen permeability ≤ 1×10 -12 cm 2 / (s·Pa); a corrugated carbon fiber truss is provided at the contact point between the storage pontoon 3 and the storage pontoon 3, and the corrugated carbon fiber truss is filled with polyurethane foam.

[0036] In the above technical scheme, the base structure of the corrugated steel isolation curtain adopts Q345B corrugated steel plate with a thickness of 5mm to form a V-shaped fold structure to enhance the impact resistance; the graphene oxide film is prepared by chemical vapor deposition on the surface of the steel plate to block the penetration of hydrogen molecules by its atomic-level dense structure; the nano-ceramic coating adopts plasma spraying technology to coat the surface of the graphene oxide layer with an Al2O3-SiO2 composite ceramic layer, which is resistant to high temperature and enhances mechanical wear resistance; the "graphene oxide film + nano-ceramic coating" stack is repeated 3 times, the total thickness is ≤20μm, and the final hydrogen permeability is ≤1×10 -12 cm 2 / (s·Pa). The isolation curtain is fixed to the sides of the hydrogen storage pontoon 2 and the storage pontoon 3 by bolts, and the edges are sealed with double nitrile rubber sealing rings to ensure that there is no hydrogen leakage at the joints. The corrugated structure improves the wind pressure resistance of the isolation curtain and absorbs the relative vibration between the pontoons. The hydrogen barrier function of the isolation curtain, the vacuum interlayer of the hydrogen storage tank, and the self-aligning conversion joint of the filling robot arm form a triple safety barrier to ensure that there is no leakage of hydrogen from storage, transmission to filling, meeting the IACS UR H2 ship hydrogen energy equipment certification requirements.

[0037] In the above technical solution, the truss body is made of T700-grade carbon fiber reinforced composite material to form a corrugated hollow truss with a tensile strength of ≥500MPa. The interior is filled with flame-retardant polyurethane foam, which uses a vacuum infusion process to ensure that the foam evenly fills the truss cavity, with a filling rate of ≥98%. The two ends of the truss are glued to the steel structure of the pontoon through a carbon fiber connecting plate. The direction of the corrugation is consistent with the force direction of the pontoon, and it can withstand a relative angular deformation of ±15°. The weight of the carbon fiber truss is lighter than that of the steel structure truss, but the bending stiffness is improved, which is suitable for deep-sea floating platforms. The polyurethane foam and the corrugated structure work together to reduce the noise between the pontoons.

[0038] In one of the technical solutions, the double-layer insulated hydrogen storage cabin 22 includes an inner liner and an outer cover, a 10-15 mm vacuum interlayer is formed between the inner liner and the outer cover, the vacuum interlayer is connected to a vacuum pump group to maintain a vacuum degree in the vacuum interlayer of ≤1Pa, a pressure sensing membrane is provided in the vacuum interlayer, and when the vacuum degree in the vacuum interlayer is >10Pa, the shore-based warning bell 5 is linked to issue an alarm.

[0039] In the above technical solution, the double-layer adiabatic hydrogen storage tank 22 with a vacuum interlayer is provided to ensure the stability of hydrogen storage. At the same time, the vacuum pump group continuously pumps air to ensure the stable pressure of the vacuum interlayer. Even if the pressure in the tank fluctuates due to hydrogen filling, the vacuum of the interlayer can still be ensured, avoiding the attenuation of the adiabatic performance. By maintaining the dynamic vacuum interlayer, the stability of hydrogen storage is further guaranteed. The built-in capacitive pressure sensing film monitors the pressure of the vacuum interlayer in real time. When the vacuum degree in the vacuum interlayer > 10 Pa, the following linkage is immediately triggered: the shore-based warning bell 5 gives an early warning, the solenoid valve connected to the hydrogen storage tank is automatically closed, and the redundant vacuum pump group (powered by a battery) is activated to try to restore the vacuum degree. In this technical solution, parameters such as the vacuum degree ≤ 1 Pa and the hydrogen permeability ≤ 1×10 -12 cm 2 / (s·Pa) meet the highest safety level (ES-1 level) for liquid hydrogen storage in the IMO "International Maritime Dangerous Goods Code" (IMDG Code), and improve the safety level by two levels compared with the conventional design.

[0040] In one of the technical solutions, a solenoid valve is provided at the hydrogen filling port of the hydrogen storage tank, and a ring-shaped hydrogen concentration sensor array is provided around the hydrogen filling port of the hydrogen storage tank. A mechanical emergency cut-off valve is provided on the end hydrogen transmission pipeline 23. When any hydrogen concentration sensor detects that the hydrogen concentration > 1% LEL, the solenoid valve corresponding to the hydrogen concentration sensor is closed and the shore-based warning bell 5 is linked to give an early warning. The mechanical emergency cut-off valve needs to be manually reset to restart.

[0041] In the above technical solution, a three-dimensional leakage prevention and control system for the filling link is constructed. The ring-shaped hydrogen concentration sensor array (accuracy 0.1% LEL) monitors the hydrogen concentration around the filling port in real time. When any sensor detects that the concentration > 1% LEL (i.e., 10% of the lower explosion limit), the solenoid valve of the corresponding hydrogen storage tank is automatically closed within 0.5 seconds to cut off the leakage source, and the response speed is increased by more than 10 times compared with the traditional manual inspection, avoiding the risk of hydrogen accumulation caused by the connection of pipeline flanges 24 and the aging of seals. This mechanism forms a "storage end - filling end" double early warning with the vacuum interlayer pressure sensing film. When leakage at the filling port and vacuum failure occur simultaneously, the hydrogen storage tank can be fully isolated within 1 second, and the accident impact can be controlled within the range of a single floating box to ensure the overall safe operation of the terminal.

[0042] In the above technical solution, the mechanical emergency cut-off valve provides redundant protection. It is made of stainless steel 316L, with a pressure resistance of 70 MPa. It needs to be manually reset on-site (rotated 3 circles to unlock) before it can be restarted, avoiding misclosure caused by misoperation of the automatic system or power interruption, and at the same time preventing unauthorized restart operations. The combined design of "automatic cut-off + manual reset" not only meets the requirement of "dual independent closure" in IMO's "Emergency Measures for Ships Carrying Dangerous Goods", but also reduces the risk of human misoperation, especially suitable for high-risk high-pressure hydrogen refueling scenarios. The segmented control of the end hydrogen transmission pipeline 23 (independent solenoid valves for each hydrogen storage tank) enables the terminal to maintain a certain refueling capacity even in case of local leakage, taking into account both safety and operation efficiency, and providing a reliable guarantee for the continuous operation of the hydrogen energy terminal.

[0043] In one of the technical solutions, the onshore warning bell 5 is provided with a hierarchical early warning module: When the vacuum degree of the vacuum interlayer > 10 Pa, a first-level early warning is triggered. The onshore warning bell 5 intermittently rings at a frequency of 0.5 Hz and activates the yellow rotating warning light; When any hydrogen concentration sensor detects that the hydrogen concentration > 1% LEL, a second-level early warning is triggered. The onshore warning bell 5 continuously beeps and activates the red strobe light, and at the same time cuts off the connection of the flange 24 of the hydrogen transmission pipeline 23 between the adjacent hydrogen storage floating tanks 2.

[0044] In the above technical solution, the precise response and hierarchical control of the terminal safety risks are achieved through the "hierarchical early warning module + linkage cut-off mechanism". The first-level early warning (yellow warning) is for the abnormal vacuum degree of the vacuum interlayer (>10 Pa), with an intermittent beeping at 0.5 Hz and a yellow rotating light, which not only ensures that the operation and maintenance personnel can detect the attenuation of the heat insulation performance of the hydrogen storage tank in time (response time ≤ 3 seconds), but also avoids the "the boy who cried wolf" effect caused by high-frequency alarms, improving the efficiency of initial fault handling. And it forms a "monitoring - early warning" closed loop with the pressure sensing film of the vacuum interlayer, providing a buffer processing window when the vacuum degree fluctuates slightly (such as 10 - 50 Pa), allowing the operation and maintenance personnel to troubleshoot the faults of the vacuum pump group within a short time and avoiding system shutdown caused by overreaction. The second-level early warning (red strobing + continuous beeping) is for the hydrogen leakage at the filling port (>1% LEL). By instantaneously activating high-intensity sound and light signals (light intensity ≥ 2000 cd, sound pressure level ≥ 100 dB), the personnel response time is shortened from 15 seconds of traditional single alarm to within 3 seconds. At the same time, the connection of the hydrogen transmission pipeline 23 flange 24 of the adjacent hydrogen storage floating tank 2 is automatically cut off (the action time of the pneumatic quick cut-off valve ≤ 0.2 seconds), controlling the leakage influence range within a single floating tank, reducing the leakage diffusion area, and forming a "double isolation" with the closing of the solenoid valve: the solenoid valve cuts off the filling port of a single hydrogen storage tank, and the flange 24 cut-off valve isolates the pipeline between the floating tanks, preventing the leakage from spreading to the entire terminal through the hydrogen transmission network. Especially when multiple floating tanks are operating in parallel, other hydrogen storage tanks can be retained to continue working. The hierarchical early warning mechanism also meets the requirements of "risk classification response" in the "Rules for the Carriage of Dangerous Goods" of the International Maritime Organization (IMO). Through multi-dimensional distinctions of color (yellow / red), light mode (rotation / strobing), and sound frequency (intermittent / continuous), the risk of personnel misjudgment is significantly reduced. In extreme cases, when the first-level early warning and the second-level early warning are triggered simultaneously, the yellow rotating warning light and the red strobing light are activated simultaneously, and the onshore warning bell beeps continuously and gradually increases the beeping decibel.

[0045] In one of the technical solutions, the connection of the hydrogen transmission pipeline 23 flange 24 is coated with a self-expanding fireproof layer, which is composed of a silicon carbide fiber braid and aerogel, and the fireproof layer is embedded with microencapsulated perfluorooctanone fire extinguishing agent. When the second-level early warning is triggered and the temperature > 80 °C, the fireproof layer expands due to heat and releases the fire extinguishing agent, forming a local inerting protection area.

[0046] In the above technical solution, an active fire barrier is constructed at the connection of the flange 24 of the hydrogen pipeline 23 through the integrated design of the self-expanding fireproof layer and the intelligent fire extinguishing system. The composite structure of the silicon carbide fiber braid (temperature resistance ≥ 1500 °C) and the aerogel can withstand the local high temperature caused by hydrogen leakage (short-term tolerance of 800 °C), while delaying the heat transfer to the inside of the pipeline, reducing the temperature rise rate, and buying response time for the release of the fire extinguishing agent. The embedded microencapsulated perfluoromethylcyclohexanone fire extinguishing agent (particle size 50 - 100 μm) ruptures when the temperature > 80 °C, and releases inert gas at a flow rate of 50 m 3 / min to quickly reduce the oxygen concentration in the protected area to below 15% (lower than the hydrogen combustion critical value of 18%), suppressing the spread of flames from the source and avoiding hydrogen deflagration accidents caused by flange 24 seal failure. At the same time, it forms a "detection - isolation - fire extinguishing" linkage closed-loop with the secondary warning module: when the hydrogen concentration > 1% LEL triggers a secondary warning (red strobe + pipeline cut-off), if accompanied by abnormal temperature (> 80 °C, indicating possible frictional heat generation or incipient combustion), the fireproof layer automatically releases the fire extinguishing agent to form an inerted protected area (fire extinguishing agent concentration ≥ 10%), controlling the accident loss at a single flange 24 node. The self-expanding structure (expansion rate 150%) can fill the flange 24 gap, prevent the flame from leaking out, and at the same time the aerogel layer reduces the pipeline thermal stress, avoiding pipeline chain rupture caused by fire. After being tested according to the UL2605 standard, this fireproof layer can reduce the spread probability of hydrogen leakage fires, providing multiple protections with heat insulation, sealing and fire extinguishing functions for high-pressure hydrogen transmission systems, especially suitable for scenarios with compact spaces and difficult fire fighting such as offshore floating platforms.

[0047] The present invention further claims the construction method of the multifunctional wharf structure, including: Step 1: Weld the hydrogen storage floating tank shell 21 and the storage floating tank 3 shell with marine corrosion-resistant steel, integrate a double-layer adiabatic hydrogen storage tank 22 with a vacuum interlayer inside the hydrogen storage floating tank 2, a hydrogen storage tank filling port is provided at the bottom of the double-layer adiabatic hydrogen storage tank 22, and a hydrogen pipeline 201 is provided at the top; a ring-shaped shelf and a storage elevator matching the shelf are arranged in the storage floating tank 3, and a ring-shaped conveyor belt is provided at the inner edge of the ring-shaped shelf; Step 2: Use a marine ground penetrating radar to scan the seabed to determine the penetration depths of the first pile column 25 and the second pile column 301, where the penetration depth in sandy seabed ≥ 8 m and the penetration depth in muddy seabed ≥ 15 m; Step 3: Use a semi-submersible barge to transport the hydrogen storage floating tank 2 and the storage floating tank 3 to the pile positions, guide the hydrogen storage floating tank 2 and the storage floating tank 3 to sink and dock with the corresponding pile columns through the GPS-RTK positioning system, and the flange 24 connection of the hydrogen pipelines 23 of adjacent hydrogen storage floating tanks 2 adopts a hot sleeve assembly process, and an interference fit is formed after natural cooling; Step 4: Install a hydrogen pipeline 201 on the top of the hydrogen storage floating tank 2. The hydrogen pipeline 201 is respectively connected to an adiabatic pipeline and a hydrogen-driven turbine 203 through a high-pressure splitter 204. The end of the adiabatic pipeline is connected to a telescopic filling robotic arm, and a ship-vehicle self-aligning conversion joint is configured at the end of the telescopic filling robotic arm. The hydrogen-driven turbine 203 is connected to a three-stage gearbox through a spline shaft. The first output shaft of the three-stage gearbox is connected to the storage elevator drive gear of the adjacent storage floating tank 3, the second output shaft is connected to the annular conveyor belt drive wheel, and the third output shaft is connected to the vacuum pump group in the vacuum interlayer.

[0048] In the above technical solution, a double-layer adiabatic hydrogen storage chamber 22 is integrated inside the hydrogen storage floating tank 2. The double-layer adiabatic hydrogen storage chamber 22 adopts a "liner + outer cover" structure, and the two are kept at a distance of 10 - 15 mm through a positioning bracket to form a vacuum interlayer. After welding, the interlayer is evacuated to ≤1 Pa by a vacuum pump group, and a helium mass spectrometer leak detector is used to detect the sealing performance to ensure that the daily evaporation rate ≤ 0.05%. The hydrogen storage chamber filling port and the hydrogen transmission pipeline 23 are welded with a forged steel flange 24, and the inside is polished to Ra ≤ 0.8 μm to reduce the hydrogen flow resistance. An annular shelf is integrated inside the storage floating tank 3, and an annular conveyor belt is installed on the inner edge of the annular shelf. The annular conveyor belt drive wheel and the storage elevator drive gear are both arranged on the side close to the hydrogen storage floating tank 2. The penetration depth of the first pile column 25 and the second pile column 301 in the sandy seabed is ≥8 m, and the penetration depth in the muddy seabed is ≥15 m. Guided by the GPS-RTK positioning system (accuracy ±2 cm) of a pile driving ship, it penetrates to the seabed. Then, a prefabricated floating tank is transported to the construction sea area by a semi-submersible barge (deadweight tonnage 5000t), and the floating tank is guided to sink by the GPS-RTK positioning system to accurately dock the bottom pile hole with the pile column. The flange 24 connection of the hydrogen transmission pipeline 23 between adjacent hydrogen storage floating tanks 2 adopts a hot sleeve assembly process: the flange 24 is heated to 200 °C (expansion amount 0.3 mm), quickly sleeved onto the docking pipeline, and forms an interference fit (fit tolerance H7 / n6) after natural cooling. The airtightness test is carried out to ensure no leakage. An equipment base is welded on the top of the hydrogen storage floating tank 2 (levelness deviation ≤ 0.5°), the hydrogen-driven turbine 203 is hoisted and rigidly connected to the three-stage gearbox through a spline shaft, and the coupling of the output shaft of the gearbox with the storage elevator drive gear, the annular conveyor belt drive wheel, and the vacuum pump group is centered, with an error ≤ 0.1 mm. The adiabatic pipeline is connected to the filling robotic arm through a high-pressure articulated joint using a vacuum adiabatic pipe, which can withstand a rotation angle of ±30°, meeting the filling requirements under the ship swaying conditions.

[0049] According to the above technical solution, through modular construction and precise positioning technology, the reliability and construction efficiency of the multi-functional wharf in a complex marine environment are ensured. The use of marine corrosion-resistant steel to weld the floating box shell and the connection of the hydrogen transmission pipeline 23 flange 24 by means of a hot sleeve assembly process improve the seawater corrosion resistance of the structure. The airtightness of the flange 24 connection reaches 70 MPa without leakage, meeting the safety requirements for high-pressure hydrogen transmission; with the guidance of the seabed geological radar survey and the GPS-RTK positioning system, the penetration depth error of the pile columns is controlled within 5 cm, adapting to different bearing requirements of sandy / silty seabeds, improving the foundation stability, and effectively withstanding the impact of typhoons of level 12 and wave heights of 5 m. Through precise integration and systematic collaborative design of the construction process, the efficient linkage of hydrogen energy storage, conversion, and warehousing functions is realized. The vacuum pumping process of the vacuum interlayer of the double-layer adiabatic hydrogen storage tank 22 in the hydrogen storage floating box 2 and the installation of the vacuum pump group ensure that the vacuum degree ≤ 1 Pa, forming a hardware basis with the pressure sensing membrane warning, and the daily evaporation rate of the hydrogen storage tank is reduced to less than 0.05%; the precise alignment installation of the hydrogen-driven turbine 203 and the three-stage gearbox improves the power transmission efficiency of the warehousing elevator, the circular conveyor belt, and the vacuum pump group, reduces energy loss, and forms an "hydrogen storage - drive - warehousing" integrated system. This construction method shortens the wharf construction period, and the error of each functional module is controlled within the highest industry standards (such as the pipeline docking deviation ≤ 3 cm, the equipment coaxiality error ≤ 0.1 mm), providing a replicable engineering solution for the large-scale construction of deep-sea and far-sea hydrogen energy wharves.

[0050] The equipment quantities and processing scales described herein are used to simplify the description of the present invention. Applications, modifications, and variations of the multi-functional wharf structure and its construction method of the present invention will be apparent to those skilled in the art.

[0051] Although the embodiments of the present invention have been disclosed as above, it is not limited to only the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to specific details and the illustrated and described examples here.

Claims

1. Multifunctional wharf structure, characterized in that, include: A hydrogen storage buoy, which has a double-layer insulated hydrogen storage tank with a vacuum interlayer integrated therein, a hydrogen storage tank filling port is provided at the bottom of the double-layer insulated hydrogen storage tank, and a hydrogen pipeline is provided at the top, the hydrogen pipeline is connected to the insulated pipeline through a high-pressure splitter, the end of the insulated pipeline is connected to a telescopic filling mechanical arm, and the end of the telescopic filling mechanical arm is equipped with a ship or vehicle self-conversion joint; A storage pontoon, wherein an annular shelf and a storage elevator matching the shelf are arranged inside, and an annular conveyor belt is arranged at the inner edge of the annular shelf; A hydrogen energy conversion assembly is arranged on the top of the hydrogen storage pontoon, and comprises a hydrogen driven turbine connected to the high-pressure splitter, the hydrogen driven turbine is connected to a three-stage gearbox through a spline shaft, the first output shaft of the three-stage gearbox is connected to the storage elevator drive gear of the adjacent storage pontoon, the second output shaft is connected to the annular conveyor belt drive wheel, and the third output shaft is connected to the vacuum pump group of the vacuum interlayer; The hydrogen storage pontoon and the storage pontoon are connected to form a floating platform of a multi-functional wharf, and the hydrogen storage pontoon is located on the outside and the storage pontoon is located on the inside. A hydrogen pipeline is provided at the filling port of the hydrogen storage tank. The hydrogen pipelines of adjacent hydrogen storage tanks are connected by flanges, and the hydrogen pipelines at the ends are connected to the shore-based hydrogen supply system.

2. The multi-functional wharf structure according to claim 1, characterized in that, The bottom of the hydrogen storage pontoon and the storage pontoon are respectively provided with a first pile and a second pile penetrating into the seabed, the top of the second pile extends into the storage pontoon, and the outer side of the section of the second pile located in the storage pontoon is provided with a vertical rack guide rail meshing with the storage elevator drive gear, and the storage elevator drive gear and the ring conveyor belt drive wheel are both arranged close to the side of the hydrogen storage pontoon.

3. The multi-functional wharf structure according to claim 2, characterized in that, The surface of the storage pontoon is provided with a loading and unloading port facing the second pile column, and the loading and unloading port is equipped with a push-pull cover plate.

4. The multifunctional wharf structure according to claim 1, characterized in that, A corrugated steel isolation curtain is provided at the contact between the hydrogen storage floating tank and the storage floating tank. The corrugated steel isolation curtain is compounded with a hydrogen barrier functional layer, and the hydrogen barrier functional layer is arranged on the side of the hydrogen storage floating tank. It includes graphene oxide thin films and nano-ceramic coatings stacked alternately, and its hydrogen permeability ≤ 1×10 -12 cm 2 / (s·Pa); A corrugated carbon fiber truss is provided at the contact between the storage floating tank and the storage floating tank, and the inside of the corrugated carbon fiber truss is filled with polyurethane foam.

5. The multi-functional wharf structure according to claim 1, characterized in that, The double-layer insulated hydrogen storage cabin includes an inner liner and an outer cover, a 10-15 mm vacuum interlayer is formed between the inner liner and the outer cover, the vacuum interlayer is connected to a vacuum pump group to maintain a vacuum degree in the vacuum interlayer of ≤1Pa, a pressure sensing membrane is provided in the vacuum interlayer, and when the vacuum degree in the vacuum interlayer is >10Pa, a shore-based warning bell is linked to issue an alarm.

6. The multi-functional wharf structure according to claim 5, characterized in that, The hydrogen storage tank filling port is provided with a solenoid valve, and a ring-shaped hydrogen concentration sensor array is provided on the periphery of the hydrogen storage tank filling port. A mechanical emergency shut-off valve is provided on the hydrogen transmission pipeline at the end. When any hydrogen concentration sensor detects that the hydrogen concentration is >1%LEL, the solenoid valve corresponding to the hydrogen concentration sensor is closed and the shore-based warning bell is linked to issue an alarm. The mechanical emergency shut-off valve needs to be manually reset before it can be restarted.

7. The multi-functional wharf structure according to claim 6, wherein, The shore-based warning bell is provided with a graded warning module: When the vacuum degree of the vacuum interlayer is greater than 10Pa, a first-level warning is triggered, the shore-based warning bell sounds intermittently at a frequency of 0.5Hz and activates a yellow rotating warning light; When any hydrogen concentration sensor detects a hydrogen concentration > 1% LEL, a secondary warning is triggered, the shore-based warning bell continues to beep and the red strobe light is activated, and the flange connection of the hydrogen pipeline between adjacent hydrogen storage pontoons is cut off.

8. The multi-functional wharf structure according to claim 7, wherein, The flange connection of the hydrogen transmission pipeline is coated with a self-expanding fireproof layer, which is composed of a silicon carbide fiber braid and aerogel, and the fireproof layer is embedded with microencapsulated perfluoromethylcyclohexanone fire extinguishing agent. When the secondary warning is triggered and the temperature > 80°C, the fireproof layer expands due to heat and releases the fire extinguishing agent, forming a local inerting protection area.

9. The construction method of the multi-functional wharf structure according to any one of claims 1 to 8, characterized in that, Including: Step 1: Weld the hydrogen storage floating box shell and the storage floating box shell with marine corrosion-resistant steel. Integrate a double-layer adiabatic hydrogen storage tank with a vacuum interlayer inside the hydrogen storage floating box. A hydrogen storage tank filling port is provided at the bottom of the double-layer adiabatic hydrogen storage tank, and a hydrogen pipeline is provided at the top. Install a ring-shaped shelf and a storage elevator supporting the shelf in the storage floating box, and an annular conveyor belt is provided at the inner edge of the ring-shaped shelf. Step 2: Use a marine ground penetrating radar to scan the seabed to determine the penetration depths of the first pile and the second pile. The penetration depth in sandy seabed is ≥ 8m, and the penetration depth in muddy seabed is ≥ 15m. Step 3: Use a semi-submersible barge to transport the hydrogen storage floating box and the storage floating box to the pile position. Guide the hydrogen storage floating box and the storage floating box to sink and dock with the corresponding pile through a GPS-RTK positioning system. The flange connection of the hydrogen transmission pipeline between adjacent hydrogen storage floating boxes adopts a hot sleeve assembly process, and an interference fit is formed after natural cooling. Step 4: Install a hydrogen pipeline on the top of the hydrogen storage floating box. The hydrogen pipeline is respectively connected to an adiabatic pipeline and a hydrogen-driven turbine through a high-pressure splitter. The end of the adiabatic pipeline is connected to a telescopic filling robotic arm, and a ship-vehicle self-aligning conversion joint is configured at the end of the telescopic filling robotic arm. The hydrogen-driven turbine is connected to a three-stage gearbox through a spline shaft. The first output shaft of the three-stage gearbox is connected to the driving gear of the storage elevator of the adjacent storage floating box, the second output shaft is connected to the driving wheel of the annular conveyor belt, and the third output shaft is connected to the vacuum pump group of the vacuum interlayer.

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