Container type gas source module

Abstract

The invention discloses a container type gas source module which comprises a helium module, an oxygen module, a mixed gas module and a compressed air module, each gas source module comprises a container frame structure and two gas cylinder containing lattice units, and the two gas cylinder containing lattice units are symmetrically arranged in the container frame structure; a gas cylinder set composed of a plurality of gas cylinders is arranged in each gas cylinder containing lattice unit, the gas cylinders are gathered to the main busbar through the branch busbar, and a first helium branch and a second helium branch are arranged on a gas discharging pipeline of the helium module. A first oxygen branch, a second oxygen branch and a third oxygen branch are arranged on a deflation pipeline of the oxygen module, the second helium branch and the first oxygen branch are gathered to an automatic gas distribution device to be mixed, and mixed gas is connected to a gas filling pipeline of the mixed gas module through a gas supercharging device. The system is compact in structure, clear in partition, capable of being deployed and managed in a unified mode and capable of meeting the requirement for centralized supply of various operation gases of the saturated diving system.

Description

Technical Field

[0001] This application belongs to the field of saturation diving technology, specifically relating to a containerized gas source module. Background Technology

[0002] Mobile saturation diving systems are primarily used for deep-sea diving operations, such as submarine rescue, emergency rescue, and salvage missions. These systems typically consist of multiple modules, including a living quarters module, a diving bell module, a deployment module, a centralized operation and control module, a life support equipment module, an emergency high-pressure escape chamber module, a support equipment module, and a gas supply module. The gas supply module, a critical life support unit in the mobile saturation diving system, is typically used to provide the diving chamber and divers with the necessary helium-oxygen mixture and maintain a suitable breathing environment within the system. Existing gas supply modules usually employ a distributed layout of fixed gas cylinder groups or integrate a small number of cylinders into simple containers. Cylinders are typically secured using straps or clips, and the gas supply is manually adjusted by connecting the cylinders. The gas manifold system is directly connected to the diving bell or breathing circuit via a single main pipeline.

[0003] However, existing gas source modules still have many shortcomings in terms of structural integration, transport adaptability, automated control, and gas utilization efficiency. For example, their structures are often incompatible with standard container systems, resulting in dispersed structures and cumbersome layouts, which are not conducive to rapid mounting and securing on ships or transport platforms; the gas cylinder arrangement is rigid and cannot be disassembled, lacking independent hoisting or module replacement capabilities; the gas supply type is limited, typically only providing helium-oxygen mixture output, unable to flexibly provide compressed air, pure oxygen, or multi-component mixtures according to actual operational needs; gas ratios and switching mostly rely on manual adjustment, making precise and intelligent management difficult; at the same time, helium cannot be effectively recovered after diving operations, resulting in gas waste and increased operating costs. Therefore, there is an urgent need for a containerized gas source module with a standardized modular structure, flexible gas source configuration capabilities, automated adjustment functions, and a helium recovery mechanism to improve the system's gas supply efficiency, safety, and operational support capabilities. Summary of the Invention

[0004] In response to the problems of non-standardized gas source module structure, limited gas supply types, manual adjustment, and inability to recover helium in existing technologies, this invention proposes a containerized gas source module, aiming to solve the technical challenges of inflexible gas source configuration, low transportation and deployment efficiency, low degree of automation, and low resource utilization in existing saturation diving systems.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] A containerized gas source module includes four gas source modules: a helium module, an oxygen module, a mixed gas module, and a compressed air module. Each gas source module includes a container frame structure and two gas cylinder compartment units symmetrically arranged within the container frame structure. Each gas cylinder compartment unit contains a gas cylinder group consisting of multiple gas cylinders, which are collected into a main manifold via branch manifolds. The helium module has a first helium branch and a second helium branch on its venting pipeline. The first helium branch is connected to a high-pressure helium supply unit. The oxygen module has a first oxygen branch, a second oxygen branch, and a third oxygen branch on its venting pipeline. The second helium branch and the first oxygen branch are collected into an automatic gas mixing device for mixing. The mixed gas in the automatic gas mixing device is connected to the filling pipeline of the mixed gas module via a gas pressurization device. A one-way valve is installed on the filling pipeline. The third oxygen branch, the venting pipeline of the mixed gas module, and the venting pipeline of the compressed air module are collected into a multi-element mixed gas mixing device.

[0007] Preferably, each main manifold is equipped with two venting shut-off valves, one filling shut-off valve, and one safety valve. One of the two venting shut-off valves is the main valve and the other is the backup valve. The safety valve is used to automatically release pressure when the gas pressure exceeds a set threshold. Each branch manifold is equipped with a pressure gauge for real-time monitoring of the gas pressure of the corresponding gas cylinder group.

[0008] Preferably, the gas pressurization device is also connected to an emergency gas supply unit.

[0009] Preferably, the second oxygen branch is connected to the oxygen supply unit.

[0010] Preferably, the multi-component gas mixing device is connected to the submersible gas supply unit, which provides compressed air, helium-oxygen mixture, or helium-nitrogen-oxygen mixture according to the operating depth.

[0011] Preferably, the third oxygen branch, the gas mixing module's venting pipeline, and the compressed air module's venting pipeline are respectively equipped with a first electromagnetic regulating valve, a second electromagnetic regulating valve, and a third electromagnetic regulating valve. The patrol gas supply unit is equipped with a controller, which is connected to the first electromagnetic regulating valve, the second electromagnetic regulating valve, and the third electromagnetic regulating valve to adjust the valve opening.

[0012] Preferably, it also includes a helium recovery device for recovering helium from the submarine gas or the decompression gas in the compartment, the helium recovery device being connected to the gas pressurization device.

[0013] Preferably, the container frame structure has the same shape and interface dimensions as a 20-foot standard container, and is equipped with 8 standard container corner fittings for mounting and securing on the mother ship.

[0014] Preferably, each of the gas cylinder container units is formed by welding a steel frame, with standard container corner fittings at the four lower corners. The gas cylinder container unit is fixed to a single dovetail base fixed to the container frame structure by a single-head dovetail turnlock.

[0015] Preferably, the gas cylinder container unit has fixing plates on the sides and top of the gas cylinders to prevent the gas cylinders from shifting during transportation or use, and the two gas cylinder container units can be hoisted separately.

[0016] The beneficial effects of this invention are as follows:

[0017] (1) This invention integrates the functions of four types of gas sources—helium, oxygen, mixed gas, and compressed air—into four standardized modules. The compact structure and clear zoning allow for unified deployment and management, meeting the centralized supply needs of various operational gases in saturated diving systems. By setting up automatic gas distribution devices and multi-element mixed gas distribution devices, it achieves automatic adaptation of operational gases from shallow to deep water, in various environments, and for various tasks. It is particularly suitable for different scenarios such as patrol diving, chamber pressure regulation, and emergency oxygen supply. This invention, by setting up a patrol diving gas supply unit and combining it with the dynamic control mechanism of electromagnetic regulating valves and controllers, can intelligently adjust the ratio of oxygen, helium, and nitrogen in the gas supply according to different operating depths, achieving real-time optimized mixing of helium-oxygen or helium-nitrogen-oxygen mixtures. This effectively reduces the physiological risks of divers developing hyperbaric neurosis, nitrogen narcosis, and hyperbaric oxygen poisoning in high-pressure environments.

[0018] (2) Each gas source module of the present invention adopts the same external dimensions and interface specifications as a 20-foot standard container. The module is equipped with standard container corner fittings to meet the loading, hoisting and positioning requirements of the standardized container system, and has good versatility and transportation compatibility. The gas cylinder container unit adopts a detachable steel frame structure, installs standard corner fittings and connects to the frame through plug-in bases, supports individual hoisting and quick replacement, has a compact overall structure, high space utilization, and standardized layout, which facilitates rapid loading, fixing and deployment on ships, mother ships or other transportation platforms. Compared with traditional non-standard equipment, the present invention greatly improves the transportation adaptability and on-site installation efficiency of the system.

[0019] (3) The system integrates a helium recovery device, which can collect, pressurize and recycle the helium-rich gas emitted after diving operations, reduce helium loss, reduce resource waste and effectively control operating costs. At the same time, in shallow and medium water depths where large amounts of helium are not required, the system can introduce a suitable amount of compressed air to replace part of the helium component, which can significantly reduce helium consumption while meeting basic breathing needs and reduce the gas supply cost of saturated diving operations. Attached Figure Description

[0020] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0021] Figure 1 This is an overall schematic diagram of the containerized gas source module shown in an embodiment of the present invention;

[0022] Figure 2 This is a front view of the container frame structure and gas cylinder container unit shown in an embodiment of the present invention;

[0023] Figure 3 This is a top view of the container frame structure and gas cylinder container unit shown in an embodiment of the present invention;

[0024] Figure 4 This is a side view of the container frame structure and gas cylinder container unit shown in an embodiment of the present invention.

[0025] Reference numerals: 1-Helium module, 2-Oxygen module, 3-Mixed gas module, 4-Compressed air module, 5-Container frame structure, 6-Gas cylinder container unit, 7-Main manifold, 8-High-pressure helium supply unit, 9-Automatic gas distribution device, 10-Gas booster device, 11-Multi-element mixed gas distribution device, 12-Emergency gas supply unit, 13-Oxygen supply unit, 14-Submarine gas supply unit, 15-Helium recovery device, 101-First helium branch, 102-Second helium branch, 201-First oxygen branch, 202-Second oxygen branch, 203-Third oxygen branch, 204-First electromagnetic regulating valve, 301-Inflation pipeline, 302-One-way valve, 303-Second electromagnetic regulating valve, 401-Third electromagnetic regulating valve, 501-Dovetail groove single base, 601-Single-head dovetail rotary lock. Detailed Implementation

[0026] To facilitate understanding of the present invention, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only. In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or implying the number of indicated technical features. Thus, unless otherwise stated, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more. The term "comprising" and any variations thereof mean non-exclusive inclusion, where one or more other features, integers, steps, operations, units, components, and / or combinations thereof may be present or added.

[0027] Furthermore, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections via an intermediate medium, or internal communication between two components. All technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0028] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] Please see Figure 1-4This embodiment provides a containerized gas source module, comprising four gas source modules: a helium module 1, an oxygen module 2, a mixed gas module 3, and a compressed air module 4. These modules are used to store and output helium, oxygen, the mixed gas, and compressed air, respectively, meeting the requirements of saturation diving systems for the classified management and independent supply of various operational gases. Each gas source module includes a container frame structure 5 and two gas cylinder compartment units 6. The container frame structure 5 adopts standard dimensions, adaptable to the general loading structure of ships or transport platforms. The two gas cylinder compartment units 6 are symmetrically arranged within the container frame structure 5, resulting in a compact overall structure and balanced center of gravity, facilitating lifting, transportation, and rapid on-site deployment. Each gas cylinder container unit 6 contains a gas cylinder group consisting of multiple gas cylinders. The gas cylinder groups are stacked in an alternating manner, which improves space utilization and facilitates centralized maintenance of the gas cylinders. Multiple gas cylinders are collected into the main manifold 7 through branch manifolds. The main manifold 7 realizes unified pressure output and switching control of each branch gas cylinder group. Each branch manifold is equipped with a pressure gauge to monitor the gas pressure of the corresponding gas cylinder group in real time. Operators can use the pressure gauge to determine the remaining gas volume or abnormal leakage of the gas cylinder, and assist in switching and replenishing the gas source.

[0030] The helium module 1 has a first helium branch 101 and a second helium branch 102 on its venting pipeline. The first helium branch 101 is connected to the high-pressure helium supply unit 8, which provides a source of high-purity helium for pressurizing the diving chamber or for emergency refueling. The second helium branch 102 and the first oxygen branch 201 converge to the automatic gas mixing device 9 for mixing. The automatic gas mixing device 9 can automatically control the helium-oxygen mixing ratio according to different diving depth requirements, thereby generating a helium-oxygen mixture that meets the target partial pressure. The oxygen module 2 has a first oxygen branch 201, a second oxygen branch 202, and a third oxygen branch 203 on its venting line. The second oxygen branch 202 is connected to the oxygen supply unit 13. The oxygen supply unit 13 can independently provide direct high-purity oxygen to the diver's breathing system, medical pressurization chamber, or maintain a stable oxygen concentration in the chamber, avoiding mixing interference caused by sharing the system with helium-oxygen mixture, thus improving the accuracy of oxygen supply and the flexibility of its use. The third oxygen branch 203, the venting line of the mixture module 3, and the venting line of the compressed air module 4 converge to the multi-component mixture distribution device 11. The distribution device 11, combined with the controller, can configure multiple mixtures as needed, realizing dynamic adjustment of the gas supply to the patrol gas supply unit 14 to adapt to different operating depths and operating environments. The mixed gas in the automatic gas distribution device 9 is connected to the gas filling pipeline 301 of the mixed gas module 3 via the gas booster device 10. A one-way valve 302 is installed on the gas filling pipeline 301. The one-way valve 302 is used to prevent gas backflow from causing mixed gas contamination or system pressure interference, and to ensure the safety and stability of one-way gas supply.

[0031] In this embodiment, each main manifold 7 is equipped with two venting shut-off valves, one charging shut-off valve, and one safety valve. One of the two venting shut-off valves is the main one, and the other is the backup one. It can quickly switch to the backup channel when the main channel fails or is under maintenance, ensuring that the system's venting function is not interrupted and improving the reliability of operation. The safety valve is used to automatically release pressure when the gas pressure exceeds a set threshold, preventing damage caused by overpressure in the gas cylinder group or pipeline system. It is an important passive safety protection component in the gas source system.

[0032] Furthermore, the gas booster 10 is also connected to the emergency gas supply unit 12, which stores pre-mixed gas and can quickly supply gas when the automatic gas distribution device 9 or the upstream module fails. This key redundancy design improves the emergency support capability and survival redundancy level of the entire system.

[0033] In this embodiment, the multi-component gas mixing device 11 is connected to the exploration gas supply unit 14. The multi-component gas mixing device 11 is used to receive gases from different gas source modules and perform proportional adjustment and mixing output. Its connection with the exploration gas supply unit 14 enables the mixed gas to be directly supplied to the operation system according to the needs of the diving mission. The exploration gas supply unit 14 provides compressed air, helium-oxygen mixture or helium-nitrogen-oxygen mixture according to the operating depth, which has the ability to adapt to the physiological needs of divers in different water depth environments. It can effectively reduce the risk of hyperbaric neurosis, nitrogen narcosis and hyperoxygen toxicity, and improve the safety and efficiency of diving operations. The third oxygen branch 203, the gas discharge line of the mixed gas module 3, and the gas discharge line of the compressed air module 4 are respectively equipped with a first electromagnetic regulating valve 204, a second electromagnetic regulating valve 303, and a third electromagnetic regulating valve 401. Before entering the multi-element mixed gas distribution device 11, the three gas sources are controlled by independent electromagnetic regulating valves to facilitate precise adjustment of the gas ratio. The patrol gas supply unit 14 is equipped with a controller, which is connected to the first electromagnetic regulating valve 204, the second electromagnetic regulating valve 303, and the third electromagnetic regulating valve 401 to adjust the valve opening. The controller automatically adjusts the opening degree of each valve according to the set diving depth parameters or real-time sensor data, thereby dynamically controlling the mixing ratio of the three gases to meet the gas composition requirements of different operation stages and physiological states. For example, during shallow water or initial pressurization, the gas supply unit 14 can provide an ambient gas primarily composed of compressed air, which can meet the pressure control needs within the living quarters and also serve as the initial breathing gas for divers. In medium-depth areas, the controller reduces the helium supply ratio and introduces some compressed air to output a helium-nitrogen-oxygen mixture while maintaining an appropriate oxygen partial pressure, effectively reducing helium consumption and lowering operating costs. As diving operations progress to deeper water, the system gradually transitions to a breathing gas configuration primarily composed of a helium-oxygen mixture to avoid the risk of nitrogen anesthetic under high pressure and to prevent hyperbaric oxygen poisoning by precisely controlling the oxygen partial pressure. The entire gas mixing process is adjusted in real time according to the controller's instructions, offering advantages such as fast response, high mixing accuracy, and strong adaptability, ensuring that divers are always in a safe, comfortable, and economical breathing environment at different depths.

[0034] In addition, a helium recovery device 15 is included to recover helium from the exploration gas or decompression gas in the cabin. The helium recovery device 15 can effectively collect and reuse helium-rich gas emitted during diving, especially during decompression or exploration phases, when a large amount of helium is expelled with decompression or exhalation. This device can significantly reduce helium waste, improve gas source utilization efficiency, and lower system operating costs. The helium recovery device 15 is connected to a gas pressurization device 10, which repressurizes the recovered low-pressure helium to a usable pressure level, allowing it to re-enter the gas source circulation system to participate in the preparation or storage of mixed gases, ensuring efficient closed-loop utilization of helium resources.

[0035] Please see Figure 2-4 The container frame structure 5 has the same external shape and interface dimensions as a standard 20-foot container. It adopts a universal standardized modular design, allowing for seamless integration with existing ships, transport platforms, and lifting equipment, providing excellent transport compatibility and rapid deployment capabilities. Eight standard container corner fittings are used for mounting and securing on the mother ship. These standard corner fittings provide a stable mechanical connection structure and facilitate rapid positioning and locking of the container module on transport, loading / unloading, and operating platforms.

[0036] Each gas cylinder compartment unit 6 is welded from a steel frame. The steel structure ensures overall strength and durability under high gas load conditions and facilitates mass production and quality control of the welding process. Standard container corner fittings are installed at the four lower corners to match the base plug-in structure, achieving structural uniformity and rapid assembly. The gas cylinder compartment unit 6 is fixed to the dovetail groove single base 501 fixed on the container frame structure 5 via a single-head dovetail twist lock 601. The dovetail structure has strong shear and pull resistance, and combined with the twist lock device, it can achieve detachable connection, facilitating rapid on-site installation, replacement, and maintenance.

[0037] The gas cylinder compartment unit 6 has fixing plates on the sides and top of the gas cylinders to prevent them from shifting during transportation or use. These fixing plates effectively suppress displacement or collisions during lifting, shaking, or vibration by limiting the lateral and longitudinal movement of the gas cylinders, thus improving safety. Two gas cylinder compartment units 6 can be lifted and placed independently, supporting modular independent loading and unloading operations. This facilitates flexible configuration and maintenance in different situations, improving the system's ease of use and scalability.

[0038] In one embodiment, each cylinder container unit 6 contains 105 horizontally arranged 20MPa, 50L cylinders. The cylinders are arranged in multiple layers along the longitudinal direction, with one layer containing 10 cylinders and another containing 11 cylinders, using a cross-stack arrangement to provide staggered support between the cylinders. This improves space utilization and enhances the stability of the overall stacking structure. Fixing plates are installed on the sides and top of the cylinders to limit their movement laterally and longitudinally, preventing cylinder movement, collisions, or displacement during transportation, lifting, or system operation, ensuring the safe fixation and structural reliability of the cylinders under high-pressure conditions. A branch manifold is provided for every 21 cylinders. The branch manifold collects and merges the output gas of the corresponding cylinder group. Each branch manifold is equipped with a pressure gauge, allowing operators to monitor the pressure status of the cylinder group in real time, facilitating the assessment of remaining gas volume and gas supply scheduling. Five branch manifolds are connected to the main manifold 7 through a shut-off valve. The shut-off valve is used to control the gas flow path, which facilitates the unified activation, deactivation or switching of the entire group of gas cylinder modules, simplifies the operation process and improves the system management efficiency.

[0039] In summary, this invention discloses a containerized gas source module comprising four functional units: a helium module 1, an oxygen module 2, a mixed gas module 3, and a compressed air module 4. Each functional unit includes a container frame structure 5 and two gas cylinder compartment units 6. Through standardized module design and intelligent control methods, it achieves unified integration and precise proportioning of helium, oxygen, mixed gas, and compressed air. It can dynamically provide suitable breathing gas according to the diving depth, ensuring operational safety while significantly reducing helium consumption and improving gas source utilization efficiency. It possesses excellent flexibility, economy, and reliability. The gas cylinder compartment units 6 support individual lifting and quick replacement. Combined with the standardized container interface design, this invention enables rapid deployment on ships or other transport platforms, greatly improving system mobility and maintenance convenience.

[0040] This invention addresses high-end operational scenarios such as saturation diving, and constructs a modular, intelligent, and multi-source integrated gas supply solution. It overcomes the bottlenecks of traditional diving gas supply systems, such as dispersed structure, manual operation, and helium waste. It can provide a stable, efficient, and safe gas supply for modern deep-sea diving operations, emergency rescue, and diving training, and has broad promotional value and far-reaching industry impact in the field of diving engineering equipment.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Under the concept of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the present invention as described above. For the sake of brevity, they are not provided in detail. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A containerized gas source module, characterized in that, It includes four gas source modules: a helium module (1), an oxygen module (2), a mixed gas module (3), and a compressed air module (4). Each gas source module includes a container frame structure (5) and two gas cylinder container units (6). The two gas cylinder container units (6) are symmetrically arranged in the container frame structure (5). Each gas cylinder container unit (6) contains a gas cylinder group consisting of multiple gas cylinders. The multiple gas cylinders are collected into a main manifold (7) through a branch manifold. The helium module (1) has a first helium branch (101) and a second helium branch (102) on its vent pipe. The first helium branch (101) is connected to a high-pressure helium supply unit (8). The oxygen module (2) has a first oxygen branch (201), a second oxygen branch (202) and a third oxygen branch (203) on its exhaust pipe. The second helium branch (102) and the first oxygen branch (201) are connected to the automatic gas distribution device (9) for mixing. The mixed gas in the automatic gas distribution device (9) is connected to the gas filling pipe (301) of the mixed gas module (3) through the gas booster device (10). A one-way valve (302) is provided on the gas filling pipe (301). The third oxygen branch (203), the exhaust pipe of the mixed gas module (3) and the exhaust pipe of the compressed air module (4) are connected to the multi-element mixed gas distribution device (11).

2. The containerized gas source module according to claim 1, characterized in that, Each of the main manifolds (7) is equipped with two venting shut-off valves, one filling shut-off valve and one safety valve. One of the two venting shut-off valves is the main valve and the other is the backup valve. The safety valve is used to automatically release pressure when the gas pressure exceeds a set threshold. Each of the branch manifolds is equipped with a pressure gauge for real-time monitoring of the gas pressure of the corresponding gas cylinder group.

3. The containerized gas source module according to claim 2, characterized in that, The gas booster (10) is also connected to the emergency gas supply unit (12).

4. The containerized gas source module according to claim 3, characterized in that, The second oxygen branch (202) is connected to the oxygen supply unit (13).

5. The containerized gas source module according to claim 4, characterized in that, The multi-component gas distribution device (11) is connected to the patrol gas supply unit (14), which provides compressed air, helium-oxygen mixture or helium-nitrogen-oxygen mixture according to the operating depth.

6. The containerized gas source module according to claim 5, characterized in that, The third oxygen branch (203), the gas mixing module (3), and the compressed air module (4) are respectively equipped with a first electromagnetic regulating valve (204), a second electromagnetic regulating valve (303), and a third electromagnetic regulating valve (401). The patrol gas supply unit (14) is equipped with a controller, which is connected to the first electromagnetic regulating valve (204), the second electromagnetic regulating valve (303), and the third electromagnetic regulating valve (401) to regulate the valve opening.

7. The containerized gas source module according to claim 6, characterized in that, It also includes a helium recovery device (15) for recovering helium from the submarine gas or the decompression gas in the cabin, the helium recovery device (15) being connected to the gas pressurization device (10).

8. The containerized gas source module according to claim 1, characterized in that, The container frame structure (5) has the same shape and interface dimensions as a 20-foot standard container, and is equipped with 8 standard container corner fittings for mounting and fixing on the mother ship.

9. The containerized gas source module according to claim 8, characterized in that, Each of the gas cylinder container units (6) is formed by welding a steel frame, with standard container corner fittings at the four lower corners. The gas cylinder container unit (6) is fixed to the dovetail groove single base (501) fixed on the container frame structure (5) by a single-head dovetail turnlock (601).

10. The containerized gas source module according to claim 9, characterized in that, The gas cylinder container unit (6) has fixing plates on the sides and top of the gas cylinders to prevent the gas cylinders from shifting during transportation or use. The two gas cylinder container units (6) can be hoisted separately.

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