Replaceable hydrogen-oxygen source storage device of underwater unmanned platform and operation method

Abstract

A replaceable hydrogen-oxygen source storage device of an underwater unmanned platform and an operating method, comprising a hydrogen-oxygen source pressure-resistant sealed cabin, which is internally arranged with a liquid oxygen storage tank and an alloy hydrogen storage tank group, the liquid oxygen storage tank is welded with an oxygen connecting block, the outer end of which is connected with an oxygen bus bar from top to bottom through a gas supply and discharge metal hose, a fullness measuring metal hose and a liquid supply and discharge metal hose, the outer end of the oxygen bus bar is welded with a gas supply and discharge pipe through-cabin sealing block, a fullness measuring pipe through-cabin sealing block and a liquid inlet and outlet through-cabin sealing block from top to bottom respectively; the alloy hydrogen storage tank group is connected with a hydrogen circulating water bus bar through a circulating water outlet metal hose, a hydrogen inlet and outlet metal hose and a circulating water inlet metal hose respectively; the end of the hydrogen-oxygen source pressure-resistant sealed cabin is locked with a sealed isolation door, which separates the hydrogen-oxygen source pressure-resistant sealed cabin from other cabins of the underwater unmanned platform. The modular design simplifies the system structure, shortens the supply guarantee time and improves the utilization rate among multiple platforms.

Description

Technical Field

[0001] This invention relates to the field of underwater unmanned platform power and support technology, and in particular to a replaceable hydrogen and oxygen source storage device and operating method for an underwater unmanned platform. Background Technology

[0002] Currently, with the rapid development and application of underwater equipment, there are higher requirements for its endurance and detection capabilities, leading to a vigorous development of underwater propulsion systems with high energy density, small size, light weight, and quiet operation. Fuel cells, with their advantages of high energy density, low operating noise, water as the only byproduct, and no wake characteristics, have found widespread application in the field of underwater equipment. This demonstrates that research on fuel cell power systems for underwater equipment has moved from the laboratory stage to the engineering application stage, and with the development of fuel cell technology, its underwater applications will become even more extensive.

[0003] Fuel cells generate electricity through an electrochemical reaction between hydrogen and oxygen. For them to function properly, both hydrogen and oxygen sources are essential. Traditional hydrogen sources typically employ high-pressure hydrogen storage. This method requires numerous explosion-proof high-pressure solenoid valves, and the high pressure of hydrogen inevitably leads to continuous micro-leakage. Furthermore, the system is complex and occupies significant space. Currently, existing hydrogen storage technologies include high-pressure hydrogen storage, metal-based hydrogen storage, and organic hydrogen storage. Metal-based hydrogen storage, due to its high safety and controllable hydrogen release characteristics, is the preferred solution for hydrogen storage on underwater unmanned platforms. Oxygen sources generally use liquid oxygen storage technology, but this involves numerous control valves and pipelines. The sheer number of valves (4-5 types, totaling over 20) means that the volume occupied by these valves and pipelines is almost half that of a liquid oxygen tank, effectively increasing the risk of leaks. This not only makes the system more complex but also requires more space. In addition, traditional unmanned platforms need to return to a fixed dock for refueling. This back-and-forth trip from the designated area to the refueling dock not only wastes the platform's operating time but also prolongs the time for refueling support and maintenance.

[0004] Furthermore, based on the needs of underwater exploration and safety assurance, the working mode of underwater unmanned platforms is gradually evolving from a single-point mode (with only one underwater unmanned platform) to underwater swarm and underwater group (similar to the current swarm operation of drones) working modes. Since the swarm involves a large number of underwater unmanned platforms, and the number of platforms required for each mission will also vary, this places higher demands on the energy replenishment of multiple underwater unmanned platforms. How to flexibly and quickly replenish energy and improve the utilization rate of each unmanned platform will become an important factor limiting the working efficiency of underwater unmanned platforms. Summary of the Invention

[0005] To address the shortcomings of the prior art, the applicant provides a replaceable hydrogen and oxygen source storage device and operating method for an underwater unmanned platform. This device adopts a modular design, simplifies the system structure, and utilizes the entire volume occupied by valves and pipelines for the liquid oxygen tank, effectively increasing the oxygen storage capacity by 50% compared to the prior art, thus improving the platform's energy density. Furthermore, the replaceable structure significantly shortens the resupply time and improves operational reliability.

[0006] The technical solution adopted in this invention is as follows:

[0007] A replaceable hydrogen and oxygen source storage device for an underwater unmanned platform includes a hydrogen and oxygen source pressure-resistant sealed chamber. The inner wall of the pressure-resistant sealed chamber is welded with spaced-apart inner support drums. A liquid oxygen storage tank and an alloy hydrogen storage tank assembly are arranged inside the inner support drums. An oxygen connection block is welded to the liquid oxygen storage tank. The outer end of the oxygen connection block is simultaneously connected to an oxygen manifold block from top to bottom via a gas supply and discharge metal hose, a full-load metal hose, and a liquid supply and discharge metal hose. The outer end of the oxygen manifold block is respectively welded from top to bottom with a gas supply and discharge pipe penetration sealing block, a full-load pipe penetration sealing block, and a liquid inlet and outlet penetration sealing block. These three blocks are simultaneously pressed against a sealed isolation door, which has an opening. A gas supply pipe penetration sealing block is connected to the gas supply and discharge pipe penetration sealing block. The exhaust pipe, the full-load pipe, and the liquid inlet / outlet pipe are all connected to the sealing block of the sealed isolation door. The exhaust pipe, the full-load pipe, and the liquid inlet / outlet pipe all pass through the opening in the sealed isolation door. The alloy hydrogen storage tank assembly is connected to a hydrogen circulating water manifold via a circulating water outlet metal hose, a hydrogen inlet / outlet metal hose, and a circulating water inlet metal hose. The outer end of the hydrogen circulating water manifold is equipped with a circulating water inlet pipe, a hydrogen inlet / outlet pipe, and a circulating water outlet pipe, all of which exit through the sealed isolation door. A flange is installed at the end of the hydrogen-oxygen source pressure-resistant sealed chamber, and the flange is locked to the sealed isolation door with fastening bolts. The sealed isolation door separates the hydrogen-oxygen source pressure-resistant sealed chamber from other compartments of the underwater unmanned platform.

[0008] Its further technical solution lies in:

[0009] The liquid oxygen storage tank and the alloy hydrogen storage tank assembly are fixed together inside the pressure-resistant sealed chamber of the hydrogen and oxygen source by a support device.

[0010] The oxygen manifold has a long strip-shaped structure.

[0011] The hydrogen circulating water manifold has a bent structure.

[0012] A circulating water inlet penetration sealing block is installed on the circulating water inlet pipe, a hydrogen inlet and outlet penetration sealing block is installed on the hydrogen inlet and outlet pipes, and a circulating water outlet penetration sealing block is installed on the circulating water outlet pipe.

[0013] The alloy hydrogen storage tank group is equipped with five alloy hydrogen storage tanks.

[0014] A shut-off valve is installed at the hydrogen outlet of the alloy hydrogen storage tank group.

[0015] An airtight door is installed on the sealed isolation door.

[0016] Each internal support drum has a circular ring structure.

[0017] An operating method for a replaceable hydrogen-oxygen source storage device for an underwater unmanned platform includes the following steps:

[0018] Step 1: Prepare multiple pre-supplied, replaceable hydrogen and oxygen source storage devices;

[0019] Step 2: Place the prepared hydrogen and oxygen source storage device at the location where resupply is needed or on the mother ship;

[0020] Step 3: When the underwater unmanned platform that needs to be resupplyed arrives at the resupply location, it first rinses the entire hydrogen and oxygen source storage device with fresh water to clean the seawater on the surface.

[0021] Step 4: Loosen the fastening bolts and disassemble the entire hydrogen-oxygen source storage device together;

[0022] Step 5: Connect the hydrogen and oxygen source storage device prepared in Step 2 to the underwater unmanned platform. After docking, tighten the fastening bolts to complete the fastening connection between the new hydrogen and oxygen source storage device and other compartments of the underwater unmanned platform.

[0023] Step 6: Using the same method as in step 5, replace all the hydrogen and oxygen source storage devices in sequence.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. This device uses hydrogen and oxygen storage as a replaceable hydrogen and oxygen source storage device, which can ensure the supply of hydrogen and oxygen through pipeline interfaces, or directly replace the standardized hydrogen and oxygen source storage device. This not only realizes the modularity and replaceability of the device, but also shortens the supply guarantee time.

[0026] 2. This device uses a hydrogen circulating water manifold to effectively merge the 21 pipelines (three pipelines from each alloy hydrogen storage tank) at the outlet of the alloy hydrogen storage tank group into three pipelines before passing through the compartment. This greatly simplifies the pipeline layout and design and reduces the complexity of the system.

[0027] 3. Except for the alloy hydrogen storage tank outlet shut-off valve and the hydrogen inlet and outlet metal hoses which are connected by threads, all other pipelines in this device are welded, which effectively prevents the leakage of hydrogen and oxygen in this chamber and greatly improves the safety of the system.

[0028] 4. This device achieves complete electrical isolation between the hydrogen-oxygen source pressure-resistant sealed chamber and other chambers. That is, there are no electrical devices in the hydrogen-oxygen source pressure-resistant sealed chamber. This eliminates the need to consider the explosion-proof design of electrical devices. While improving safety, it reduces the explosion-proof rating of related electrical devices and greatly reduces the size and weight of electrical devices.

[0029] 5. This device uses an oxygen connector and an oxygen manifold, and a metal hose is used between the two, which simplifies the oxygen function pipeline and effectively buffers the deformation caused by thermal expansion and contraction or pressure resistance structure.

[0030] 6. This device uses a customized liquid oxygen storage tank. The self-evaporation capacity of the liquid oxygen storage tank meets the oxygen requirements of the fuel cell stack, which greatly reduces the heating power of the liquid oxygen vaporizer and simplifies the pipeline design.

[0031] 7. This device uses a sealed isolation door, which can prevent hydrogen and oxygen from leaking into the adjacent compartment during normal operation, and facilitates the maintenance and replacement of maintainable equipment inside the compartment during base maintenance.

[0032] 8. This invention effectively ensures the safety of hydrogen storage and oxygen use in underwater unmanned platforms, minimizes leakage points, maximizes energy density, facilitates maintenance and repair, and enhances replaceability.

[0033] 9. This invention is mainly used for the safe storage and use of hydrogen and oxygen on underwater unmanned platforms, and to achieve efficient maintenance and support for underwater unmanned platforms and modularization, standardization and universalization of hydrogen and oxygen source storage devices. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of the present invention.

[0035] Figure 2 This is an exploded view (I) of the present invention.

[0036] Figure 3 This is an exploded view (II) of the present invention.

[0037] Figure 4 for Figure 2 Side view.

[0038] The components include: 1. Liquid oxygen storage tank; 2. Oxygen connection block; 3. Gas supply and discharge metal hose; 4. Full-load metal hose; 5. Oxygen manifold; 6. Gas supply and discharge pipe penetration sealing block; 7. Gas supply and discharge pipe penetration; 8. Full-load pipe penetration; 9. Full-load pipe penetration sealing block; 10. Liquid inlet and outlet pipe penetration; 11. Liquid inlet and outlet pipe penetration sealing block; 12. Circulating water inlet pipe; 13. Circulating water inlet pipe penetration sealing block; 14. Hydrogen inlet and outlet pipes; 15. Hydrogen inlet and outlet pipe penetration. 16. Circulating water outlet through-tank sealing block; 17. Circulating water outlet pipe; 18. Hydrogen circulating water manifold block; 19. Shut-off valve; 20. Supply and drainage metal hose; 21. Circulating water outlet metal hose; 22. Hydrogen inlet and outlet metal hose; 23. Circulating water inlet metal hose; 24. Alloy hydrogen storage tank group; 25. Hydrogen and oxygen source pressure-resistant sealed chamber; 26. Sealed isolation door; 27. Fastening bolts; 28. Airtight door; 29. ​​Internal support drum. Detailed Implementation

[0039] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0040] like Figures 1-4 As shown, the replaceable hydrogen and oxygen source storage device of the underwater unmanned platform in this embodiment includes a hydrogen and oxygen source pressure-resistant sealed chamber 25. The inner wall of the hydrogen and oxygen source pressure-resistant sealed chamber 25 is welded with spaced-apart inner support drums 29. Inside the inner support drums 29, a liquid oxygen storage tank 1 and an alloy hydrogen storage tank group 24 are arranged. An oxygen connection block 2 is welded onto the liquid oxygen storage tank 1. The outer end of the oxygen connection block 2 is simultaneously connected to an oxygen manifold 5 from top to bottom via a gas supply and discharge metal hose 3, a full-fill metal hose 4, and a liquid supply and discharge metal hose 20. The outer end of the oxygen manifold 5 is respectively welded from top to bottom with a gas supply and discharge pipe penetration sealing block 6, a full-fill pipe penetration sealing block 9, and an inlet and outlet liquid penetration sealing block 11. These three sealing blocks are simultaneously pressed against a sealed isolation door 26. The sealed isolation door 26 has an opening, and a gas supply and discharge penetration pipe 7 is connected to the gas supply and discharge pipe penetration sealing block 6. The full-pipe penetration sealing block 9 is connected to the full-pipe penetration pipe 8, and the liquid inlet / outlet penetration sealing block 11 is connected to the liquid inlet / outlet penetration pipe 10. The gas supply and discharge penetration pipe 7, the full-pipe penetration pipe 8, and the liquid inlet / outlet penetration pipe 10 all pass through the opening of the sealed isolation door 26. The alloy hydrogen storage tank group 24 is connected to the hydrogen circulating water manifold 18 through the circulating water outlet metal hose 21, the hydrogen inlet / outlet metal hose 22, and the circulating water inlet metal hose 23, respectively. The outer end of the hydrogen circulating water manifold 18 is equipped with the circulating water inlet pipe 12, the hydrogen inlet / outlet pipe 14, and the circulating water outlet pipe 17, respectively. The circulating water inlet pipe 12, the hydrogen inlet / outlet pipe 14, and the circulating water outlet pipe 17 pass through the sealed isolation door 26. The end of the hydrogen-oxygen source pressure-resistant sealed chamber 25 is provided with a flange, which is locked to the sealed isolation door 26 by fastening bolts 27. The sealed isolation door 26 separates the hydrogen-oxygen source pressure-resistant sealed chamber 25 from other compartments of the underwater unmanned platform.

[0041] The liquid oxygen storage tank 1 and the alloy hydrogen storage tank group 24 are fixed together inside the hydrogen and oxygen source pressure-resistant sealed chamber 25 by a support device.

[0042] The oxygen manifold 5 has a long strip-shaped structure.

[0043] The hydrogen circulating water manifold 18 has a bent structure.

[0044] A circulating water inlet penetration sealing block 13 is installed on the circulating water inlet pipe 12, a hydrogen inlet and outlet penetration sealing block 15 is installed on the hydrogen inlet and outlet pipes 14, and a circulating water outlet penetration sealing block 16 is installed on the circulating water outlet pipe 17.

[0045] The alloy hydrogen storage tank group 24 is equipped with five alloy hydrogen storage tanks.

[0046] A shut-off valve 19 is installed at the hydrogen outlet of the alloy hydrogen storage tank group 24.

[0047] An airtight door 28 is installed on the sealed isolation door 26.

[0048] The individual inner support drum 29 has a circular structure.

[0049] The operation method of the replaceable hydrogen and oxygen source storage device of the underwater unmanned platform in this embodiment includes the following operation steps:

[0050] Step 1: Prepare multiple pre-supplied, replaceable hydrogen and oxygen source storage devices;

[0051] Step 2: Place the prepared hydrogen and oxygen source storage device at the location where resupply is needed or on the mother ship;

[0052] Step 3: When the underwater unmanned platform that needs to be resupplyed arrives at the resupply location, it first rinses the entire hydrogen and oxygen source storage device with fresh water to clean the seawater on the surface.

[0053] Step 4: Loosen the fastening bolt 27 and disassemble the entire hydrogen-oxygen source storage device together;

[0054] Step 5: Connect the hydrogen and oxygen source storage device prepared in Step 2 to the underwater unmanned platform. After docking, tighten it with fastening bolt 27 to complete the fastening connection between the new hydrogen and oxygen source storage device and other compartments of the underwater unmanned platform.

[0055] Step 6: Using the same method as in step 5, replace all the hydrogen and oxygen source storage devices in sequence.

[0056] The specific structure of the replaceable hydrogen and oxygen source storage device for the underwater unmanned platform described in this invention is as follows:

[0057] It mainly includes a liquid oxygen storage tank 1, an alloy hydrogen storage tank group 24, an oxygen connection block 2, a hydrogen circulating water manifold 18, a hydrogen and oxygen source pressure-resistant sealed chamber 25, a sealed isolation door 26, a full-fill penetration pipe 8, an inlet / outlet liquid penetration pipe 10, hydrogen inlet / outlet metal hoses 22, a discharge metal hose, a liquid supply / discharge metal hose 20, a circulating water outlet pipe 17, a circulating water outlet metal hose 21, hydrogen inlet / outlet pipes 14, an airtight door 28, and a shut-off valve 19, etc.

[0058] When the underwater unmanned platform is navigating or conducting exploration operations, the gaseous oxygen that evaporates from the liquid oxygen storage tank 1 is supplied to the fuel cell stacks in other compartments through the oxygen connection block 2, the oxygen manifold block 5, and the oxygen supply and discharge through-chamber pipe. The hydrogen in the alloy hydrogen storage tank group 24 is heated by circulating water and supplied to the fuel cell stacks in other compartments through the alloy hydrogen storage tank group 24, the hydrogen inlet and outlet metal hoses 22, the hydrogen circulating water manifold block 18, and the hydrogen inlet and outlet through-chamber pipe.

[0059] When the underwater unmanned platform needs to be maintained by replenishing hydrogen and oxygen at the base or dock, it can be directly connected to the hydrogen and oxygen replenishment port through an external replenishment pipeline, or the fastening bolts 27 between the hydrogen and oxygen source pressure-resistant sealed chamber 25, the sealed isolation door 26 and other compartments can be removed to directly replace the replenished hydrogen and oxygen source storage device in a modular manner.

[0060] The functions of each component in the replaceable hydrogen-oxygen source storage device for the underwater unmanned platform described in this invention are as follows:

[0061] Liquid oxygen storage tank 1 - A pressure vessel specifically designed for storing cryogenic liquid oxygen on an underwater unmanned platform. It is a double-layered high-vacuum insulated container, with the vacuum interlayer achieving liquid oxygen insulation through vacuuming and covering with insulation materials.

[0062] Oxygen connecting block 2 - a centralized channel for the inlet and outlet of liquid oxygen and gas oxygen in a liquid oxygen storage tank 1. It has holes for the flow of liquid oxygen and gas oxygen inside. One end of it is welded to the liquid oxygen storage tank 1, and the other end is connected to the gas supply and discharge metal hose 3, the full-fill metal hose 4, and the liquid supply and discharge metal hose 20.

[0063] Gas supply and discharge metal hose 3 - A metal hose for oxygen supply and discharge, which has temperature compensation and displacement compensation functions, one end of which is welded to oxygen connection block 2 and the other end is welded to oxygen manifold block 5.

[0064] Fullness Measurement Metal Hose 4 - When the underwater unmanned platform is replenishing liquid oxygen, this hose is connected to a remote safe location. This hose is a fullness measurement channel to detect whether the liquid oxygen tank in the underwater unmanned platform is full. When the fullness rate in the liquid oxygen storage tank 1 reaches a certain value, the fullness measurement hose is opened, and liquid oxygen will flow out from this hose.

[0065] Oxygen manifold 5 - a device for centralized inflow and outflow of liquid oxygen and gaseous oxygen, one end of which is welded to the gas supply and discharge metal hose 3, the full-fill metal hose 4 and the liquid supply and discharge metal hose 20, and the other end is welded to the gas supply and discharge pipe through-chamber sealing block 6, the full-fill pipe through-chamber sealing block 9 and the liquid inlet and outlet through-chamber sealing block 11.

[0066] The gas supply and discharge pipe through-chamber sealing block 6 is a sealing block with oxygen supply and discharge channels. One end of it is welded to the oxygen manifold block 5, and the other end has a groove for placing a sealing ring. It is pressed against the sealing isolation door 26 by sealing the end face.

[0067] The gas supply and discharge through-chamber pipe 7 is a through-chamber pipe with oxygen supply and discharge channels. After passing through the sealed isolation door 26, the gas supply and discharge through-chamber pipe 7 has external threads. The gas supply and discharge through-chamber sealing block 6 is pressed against the sealed isolation door 26 by bolts to achieve airtightness.

[0068] The test tube 8 is a type of transect pipe with a liquid oxygen discharge channel. After passing through the sealed isolation door 26, the test tube 8 has external threads. The test tube transect sealing block 9 is pressed against the sealed isolation door 26 by bolts to achieve airtightness.

[0069] The full-pipe penetration sealing block 9 is a sealing block with a liquid oxygen discharge channel. One end of it is welded to the oxygen manifold block 5, and the other end has a groove for placing a sealing ring. It is pressed onto the sealing isolation door 26 by sealing the end face.

[0070] Liquid inlet / outlet pipe 10 - A pipe with a liquid oxygen inlet / outlet channel, which passes through the sealed isolation door 26 and has external threads. The liquid inlet / outlet pipe 10 is pressed against the sealed isolation door 26 by bolts to achieve airtightness.

[0071] Liquid inlet / outlet passage sealing block 11 - a sealing block with a liquid oxygen inlet / outlet channel, one end of which is welded to the oxygen manifold block 5, and the other end has a groove for placing a sealing ring, and is pressed onto the sealing isolation door 26 by end face sealing.

[0072] Circulating water inlet pipe 12 - a circulating water inlet passage between a hydrogen circulating water manifold 18 and the outside or other compartments.

[0073] Circulating water inlet through-chamber sealing block 13 - A sealing block with a circulating water inlet, one end of which is welded to the hydrogen circulating water manifold block 18, and the other end has a groove for placing a sealing ring, which is pressed onto the sealing isolation door 26 by end face sealing.

[0074] Hydrogen inlet / outlet pipe 14 - a hydrogen circulation water manifold 18 and hydrogen inlet / outlet passage to the outside or other compartments.

[0075] Hydrogen inlet / outlet transom sealing block 15 - A sealing block with hydrogen inlet / outlet, one end of which is welded to hydrogen circulating water manifold 18, and the other end has a groove for placing a sealing ring, which is pressed onto the sealing isolation door 26 by end face sealing.

[0076] Circulating water outlet through-chamber sealing block 16 - a sealing block with a circulating water outlet, one end of which is welded to the hydrogen circulating water manifold block 18, and the other end has a groove for placing a sealing ring, and is pressed onto the sealing isolation door 26 by end face sealing.

[0077] Circulating water outlet pipe 17 - a circulating water outlet passage between a hydrogen circulating water manifold 18 and the outside or other compartments.

[0078] Hydrogen circulating water manifold 18 - a device for the outflow and outflow of hydrogen and circulating water, one end of which is welded to multiple circulating water outlet metal hoses 21, hydrogen inlet and outlet metal hoses 22, and circulating water inlet metal hoses 23, and the other end is welded to circulating water inlet pipe 12, hydrogen inlet and outlet pipes 14, and circulating water outlet pipe 17.

[0079] Shut-off valve 19 - A valve with manual shut-off function for opening and closing the outlet hydrogen of an alloy hydrogen storage tank.

[0080] Liquid oxygen supply and drainage metal hose 20 - a metal hose for liquid oxygen inlet and outlet, which has temperature compensation and displacement compensation functions, one end of which is welded to oxygen connection block 2 and the other end is welded to oxygen manifold block 5.

[0081] Circulating water outlet metal hose 21 - A metal hose for discharging circulating water, which has temperature compensation and displacement compensation functions. One end is connected to the alloy hydrogen storage tank group 24, and the other end is welded to the hydrogen circulating water manifold 18.

[0082] Hydrogen inlet / outlet metal hose 22 - A metal hose for hydrogen inlet / outlet, which has temperature compensation and displacement compensation functions. One end is connected to the alloy hydrogen storage tank group 24, and the other end is welded to the hydrogen circulating water manifold 18.

[0083] Circulating water inlet metal hose 23 - A metal hose for inlet circulating water, which has temperature compensation and displacement compensation functions. One end is connected to the alloy hydrogen storage tank group 24, and the other end is welded to the hydrogen circulating water manifold 18.

[0084] Alloy hydrogen storage tank assembly 24 - a safe hydrogen storage device. When hydrogen is filled, hydrogen gas decomposes into hydrogen atoms on the surface of the alloy. Then, the hydrogen atoms diffuse into the interior of the alloy and react with the alloy to generate metal hydrides. When hydrogen needs to be released, external heat is applied to the metal hydrides, which decompose into hydride metal and release hydrogen gas.

[0085] Hydrogen-oxygen source pressure-resistant sealed chamber 25 - a pressure-resistant sealed chamber for storing equipment such as alloy hydrogen storage tank group 24 and liquid oxygen storage tank 1, which can withstand the back pressure of seawater underwater and prevent seawater from leaking into the chamber.

[0086] Sealed isolation door 26 - a sealing device for separating the hydrogen-oxygen source pressure-resistant sealed chamber 25 from other compartments of the underwater unmanned platform, the device having a sealing function to prevent gas in the hydrogen-oxygen source pressure-resistant sealed chamber 25 from leaking into other compartments.

[0087] Fastening bolt 27 - used to connect the hydrogen-oxygen source pressure-resistant sealed chamber 25, the sealed isolation door 26, and other compartments of the underwater unmanned platform.

[0088] Airtight door 28 - A personnel access passage for personnel to perform maintenance on equipment in a hydrogen-oxygen source pressure-resistant sealed chamber 25 at a base or dock.

[0089] The replaceable hydrogen and oxygen source storage device for underwater unmanned platforms described in this invention is mainly used for the safe storage and use of hydrogen and oxygen on underwater unmanned platforms. It also enables efficient maintenance and standard replacement of hydrogen and oxygen source storage devices for underwater unmanned platforms. This significantly increases the energy storage density per unit space for underwater unmanned platforms and achieves modularization, standardization, and universalization of the hydrogen and oxygen source storage device. This effectively improves the maintenance and replenishment efficiency of the hydrogen and oxygen source storage device at bases or docks. Furthermore, this invention simplifies the design of hydrogen and oxygen pipelines and reduces potential leakage points in the hydrogen and oxygen source pressure-resistant sealed chamber 25, avoiding the use of electrical equipment in this area and greatly reducing the possibility of fire or explosion, thus effectively improving system safety.

[0090] In actual work process:

[0091] (a) Storage and use of hydrogen and oxygen during normal operation:

[0092] When the underwater unmanned platform is navigating or conducting exploration operations underwater, the vaporized oxygen in the liquid oxygen storage tank 1 passes through the oxygen connection block 2, the gas supply and discharge metal hose 3, the oxygen manifold block 5, the gas supply and discharge pipe through-chamber sealing block 6, and the gas supply and discharge through-chamber pipe 7, and then through the sealed isolation door 26, delivering the oxygen from the hydrogen-oxygen source pressure-resistant sealed chamber 25 to other chambers for use by the fuel cell; the hydrogen in the alloy hydrogen storage tank group 24, after being heated by circulating water, passes through the hydrogen inlet and outlet metal hoses 22, the hydrogen circulating water manifold block 18, and the hydrogen inlet and outlet through-chamber sealing door 7. The sealing block 15 and hydrogen inlet / outlet pipe 14 pass through the sealed isolation door 26 to transport hydrogen from the hydrogen-oxygen source pressure-resistant sealed chamber 25 to other chambers for use by the fuel cell. Circulating water enters the alloy hydrogen storage tank group 24 from the circulating water inlet pipe 12, circulating water inlet through-chamber sealing block 13, hydrogen circulating water manifold 18, and circulating water inlet metal hose 23. After being heated, it flows out from the circulating water outlet metal hose 21, passes through the hydrogen circulating water manifold 18, circulating water outlet through-chamber sealing block 16, and finally flows out through the circulating water outlet pipe 17.

[0093] (ii) Hydrogen and oxygen replenishment or maintenance at the base or dock:

[0094] When an underwater unmanned platform needs to replenish hydrogen and oxygen at a base, dock, or mother ship, there are two replenishment methods: one is without disassembling the fastening bolts 27 between the hydrogen and oxygen source pressure-resistant sealed chamber 25, the sealed isolation door 26, and other compartments. When replenishing hydrogen, the external pipeline is directly connected to the hydrogen inlet / outlet pipe 14 of the hydrogen replenishment pipeline interface in the hydrogen and oxygen source pressure-resistant sealed chamber 25, and the circulating water is connected to the circulating water inlet pipe 12 and the circulating water outlet pipe 17 respectively. When replenishing liquid oxygen, the external pipeline is directly connected to the test full penetration pipe 8, the liquid inlet / outlet penetration pipe 10, and the gas supply / discharge penetration pipe 7 in the hydrogen and oxygen source pressure-resistant sealed chamber 25 to achieve liquid oxygen refueling. When inspection or maintenance is required, the airtight door 28 is opened for inspection and maintenance. Another method is to remove the fastening bolts 27 between the hydrogen-oxygen source pressure-resistant sealed chamber 25, the sealed isolation door 26 and other compartments, directly replace the replenished hydrogen-oxygen source pressure-resistant sealed chamber 25 with the one that needs replenishment, and then use the fastening bolts 27 to fasten the hydrogen-oxygen source pressure-resistant sealed chamber 25, the sealed isolation door 26 and other compartments.

[0095] This invention employs a modular approach in operation. Taking five underwater unmanned platforms as a cluster as an example, traditional resupply methods require going to a designated resupply dock. Resupplying one by one results in long resupply times (approximately 30 hours for a single platform's hydrogen and oxygen resupply). To resupply all five platforms simultaneously, multiple resupply facilities need to be built at the designated dock, significantly increasing construction and maintenance costs. The operating method described in this invention allows for convenient and rapid replacement of all five platforms simultaneously, greatly shortening resupply time. Furthermore, rapid replacement and equipment exchange are possible between the five platforms, preventing the entire platform from becoming unusable due to a single platform's failure or maintenance. This significantly improves the utilization rate of multiple platforms and enables modular replacement of each platform.

[0096] After adopting the operating method described in this invention, there is no need to return to a designated dock for resupply. Operation can be carried out wherever there is a replaceable hydrogen and oxygen storage device or a mother ship. This not only improves the platform's operating time and resupply efficiency, but also saves the resupply time required for returning to a fixed dock, and can almost achieve in-situ resupply in a designated area at sea.

[0097] The above description is an explanation of the present invention and not a limitation thereof. The scope of the present invention is defined by the claims. Within the scope of protection of the present invention, any form of modification may be made.

Claims

1. A replaceable hydrogen-oxygen source storage device for an underwater unmanned platform, characterized by: The hydrogen-oxygen source pressure-resistant sealed cabin (25) is provided with inner support drums (29) which are welded on the inner wall of the hydrogen-oxygen source pressure-resistant sealed cabin (25) and are arranged with liquid oxygen storage tanks (1) and alloy hydrogen storage tank groups (24) inside, the liquid oxygen storage tanks (1) are welded with oxygen connecting blocks (2), the outer end of the oxygen connecting block (2) is connected with an oxygen bus bar (5) through a gas supply and discharge metal hose (3), a fullness measuring metal hose (4) and a liquid supply and discharge metal hose (20) from top to bottom, the outer end of the oxygen bus bar (5) is welded with a gas supply and discharge pipe cabin penetrating sealing block (6), a fullness measuring pipe cabin penetrating sealing block (9) and a liquid inlet and outlet cabin penetrating sealing block (11) from top to bottom, the gas supply and discharge pipe cabin penetrating sealing block (6), the fullness measuring pipe cabin penetrating sealing block (9) and the liquid inlet and outlet cabin penetrating sealing block (11) are simultaneously pressed on a sealed isolation door (26), the sealed isolation door (26) is provided with a hole, the gas supply and discharge pipe cabin penetrating sealing block (6) is connected with a gas supply and discharge cabin penetrating pipe (7), the fullness measuring pipe cabin penetrating sealing block (9) is connected with a fullness measuring cabin penetrating pipe (8), the liquid inlet and outlet cabin penetrating sealing block (11) is connected with a liquid inlet and outlet cabin penetrating pipe (10), the gas supply and discharge cabin penetrating pipe (7), the fullness measuring cabin penetrating pipe (8) and the liquid inlet and outlet cabin penetrating pipe (10) all pass through the hole of the sealed isolation door (26), the alloy hydrogen storage tank group (24) is connected with a hydrogen circulating water bus bar (18) through a circulating water outlet metal hose (21), a hydrogen inlet and outlet metal hose (22) and a circulating water inlet metal hose (23), the outer end of the hydrogen circulating water bus bar (18) is provided with a circulating water inlet pipe (12), a hydrogen inlet and outlet pipe (14) and a circulating water outlet pipe (17), the circulating water inlet pipe (12), the hydrogen inlet and outlet pipe (14) and the circulating water outlet pipe (17) pass out of the sealed isolation door (26), the hydrogen-oxygen source pressure-resistant sealed cabin (25) is provided with a flange plate, the flange plate is locked with the sealed isolation door (26) through fastening bolts (27), the sealed isolation door (26) separates the hydrogen-oxygen source pressure-resistant sealed cabin (25) from other cabins of the underwater unmanned platform.

2. The replaceable hydrogen-oxygen source storage device of the unmanned underwater platform according to claim 1, characterized in that: The liquid oxygen storage tanks (1) and the alloy hydrogen storage tank group (24) are fixed in the hydrogen-oxygen source pressure-resistant sealed cabin (25) through a support device.

3. The replaceable hydrogen-oxygen source storage device of the unmanned underwater platform according to claim 1, characterized in that: The oxygen bus bar (5) is in a long strip structure.

4. The replaceable hydrogen-oxygen source storage device of the unmanned underwater platform according to claim 1, characterized in that: The hydrogen circulating water bus bar (18) is in a bending structure.

5. The replaceable hydrogen-oxygen source storage device of the unmanned underwater platform according to claim 1, characterized in that: The circulating water inlet pipe (12) is provided with a circulating water inlet cabin penetrating sealing block (13), the hydrogen inlet and outlet pipe (14) is provided with a hydrogen inlet and outlet cabin penetrating sealing block (15), and the circulating water outlet pipe (17) is provided with a circulating water outlet cabin penetrating sealing block (16).

6. The replaceable hydrogen-oxygen source storage device of the unmanned underwater platform according to claim 1, characterized in that: The alloy hydrogen storage tank group (24) is provided with five alloy hydrogen storage tanks.

7. The replaceable hydrogen-oxygen source storage device of the unmanned underwater platform according to claim 1, characterized in that: The hydrogen outlet of the alloy hydrogen storage tank group (24) is provided with a stop valve (19).

8. The replaceable hydrogen-oxygen source storage device of the unmanned underwater platform according to claim 1, characterized in that: The sealed isolation door (26) is provided with an air-tight door (28).

9. The replaceable hydrogen-oxygen source storage device of the unmanned underwater platform according to claim 1, characterized in that: A single inner support drum (29) is in a circular ring structure.

10. A method of operating a replaceable hydrogen-oxygen source storage device for an underwater unmanned platform as claimed in claim 1, characterized in that: The operation steps include the following steps: First step: prepare multiple replaceable hydrogen-oxygen source storage devices which have been refilled; Second step: Put the prepared hydrogen oxygen source storage device in the place where it is needed or on the mother ship; Third step: When the underwater unmanned platform that needs to be supplied reaches the supply site, first flush the entire hydrogen oxygen source storage device with fresh water to flush away the seawater on the surface; Fourth step: Loosen the fastening bolt (27) and remove the entire hydrogen oxygen source storage device; Fifth step: Connect the hydrogen oxygen source storage device prepared in the second step to the underwater unmanned platform. After the connection is completed, tighten the fastening bolt (27) to complete the fastening connection of the new hydrogen oxygen source storage device with other cabins of the underwater unmanned platform; Sixth step: Use the same method as in the fifth step to replace all hydrogen oxygen source storage devices in turn.

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