Multi-gas centralized supply system for cryogenic vessel production

Abstract

This application discloses a centralized gas supply system for cryogenic container production, comprising a gas consumption unit, a gas supply unit, and a gas distribution unit. The gas consumption unit includes a first gas shielded welding machine, a second gas shielded welding machine, a plasma welding machine, an argon arc welding machine, and a silver brazing machine. The gas supply unit includes a centrally arranged liquid nitrogen storage tank, a nitrogen storage tank, a nitrogen buffer tank, a liquid argon storage tank, an argon storage tank, an argon buffer tank, a liquid oxygen storage tank, an oxygen buffer tank, an oxygen-argon mixing cabinet, an oxygen-argon mixed gas storage tank, an oxygen-argon mixed gas buffer tank, a hydrogen cylinder, a hydrogen-argon mixing cabinet, a hydrogen-argon mixed gas storage tank, a hydrogen-argon mixed gas buffer tank, and a propane cylinder. The gas distribution unit includes nitrogen supply points, oxygen supply points, argon supply points, propane supply points, oxygen-argon mixed gas supply points, and hydrogen-argon mixed gas supply points adjacent to the gas consumption unit. This application achieves centralized gas management, making gas supply more convenient and reducing safety hazards and gas supply management costs.

Description

Technical Field

[0001] This application relates to the field of gas supply system technology, and in particular to a centralized gas supply system for the production of cryogenic containers. Background Technology

[0002] Currently, cryogenic container production requires a variety of gases. Most cryogenic container manufacturers use small steel cylinders or Dewar flasks placed at workstations to supply nitrogen, argon, oxygen, oxygen-argon mixtures, and hydrogen-argon mixtures. This often leads to chaotic gas usage, ineffective management, low efficiency, and significant losses. While some gas supply methods utilize storage tanks, the supply method is singular, resulting in low gas utilization. Furthermore, the numerous cylinders and tanks in the workshop are difficult to manage, frequently causing sudden gas supply interruptions or waste. The large quantities of gases such as oxygen, acetylene, nitrogen, and argon, including some flammable and explosive gases, pose significant safety hazards, causing disadvantages for both the company and its employees. Summary of the Invention

[0003] In order to solve the above-mentioned technical problems, the purpose of this application is to provide a centralized gas supply system for cryogenic container production that features centralized gas management and convenient gas supply.

[0004] To achieve the above objectives, this application adopts the following technical solution: a centralized gas supply system for multiple gases used in the production of cryogenic containers, comprising...

[0005] The gas-using unit includes a first gas-shielded welding machine, a second gas-shielded welding machine, a plasma welding machine, an argon arc welding machine, and a silver brazing machine;

[0006] The gas supply unit includes a centrally arranged liquid nitrogen storage tank, nitrogen storage tank, nitrogen buffer tank, liquid argon storage tank, argon storage tank, argon buffer tank, liquid oxygen storage tank, oxygen buffer tank, oxygen-argon mixing cabinet, oxygen-argon mixed gas storage tank, oxygen-argon mixed gas buffer tank, hydrogen cylinder, hydrogen-argon mixing cabinet, hydrogen-argon mixed gas storage tank, hydrogen-argon mixed gas buffer tank, and propane cylinder; the liquid nitrogen storage tank, nitrogen storage tank, and nitrogen buffer tank are sequentially connected via flexible metal hoses; the liquid oxygen storage tank is connected to the oxygen buffer tank via a flexible metal hose. The liquid argon storage tank, argon gas storage tank, and argon gas buffer tank are connected sequentially via flexible metal hoses; the oxygen-argon mixing cabinet is connected to both the liquid oxygen storage tank and the liquid argon storage tank via flexible metal hoses, and the oxygen-argon mixing cabinet, oxygen-argon mixed gas storage tank, and oxygen-argon mixed gas buffer tank are connected sequentially via flexible metal hoses; the hydrogen-argon mixing cabinet is connected to both the liquid argon storage tank and the hydrogen cylinder via flexible metal hoses, and the hydrogen-argon mixing cabinet, hydrogen-argon mixed gas storage tank, and hydrogen-argon mixed gas buffer tank are connected sequentially; and

[0007] A gas distribution unit is arranged adjacent to the gas-using unit. The gas distribution unit includes multiple nitrogen supply points connected to the nitrogen buffer tank, multiple oxygen supply points connected to the oxygen buffer tank, multiple argon supply points connected to the argon buffer tank, at least one propane supply point connected to the propane cylinder, multiple oxygen-argon mixed gas supply points connected to the oxygen-argon mixed gas buffer tank, and multiple hydrogen-argon mixed gas supply points connected to the hydrogen-argon mixed gas buffer tank.

[0008] The first gas-shielded welding machine is connected to at least one nitrogen supply point and at least one oxygen-argon mixed gas supply point; the second gas-shielded welding machine is connected to at least one nitrogen supply point and at least one hydrogen-argon mixed gas supply point; the plasma welding machine is connected to at least one nitrogen supply point and at least one argon supply point; the argon arc welding machine is connected to at least one argon supply point; and the silver brazing machine is connected to at least one oxygen supply point and at least one propane supply point.

[0009] In the above technical solution, a cryogenic shut-off valve is further preferably installed at each of the multiple nitrogen gas supply points, multiple oxygen gas supply points, multiple argon gas supply points, at least one propane gas supply point, multiple oxygen-argon mixed gas supply points, and multiple hydrogen-argon mixed gas supply points.

[0010] In the above technical solution, a further preferred embodiment is that the gas supply unit further includes multiple vaporizers, with at least one vaporizer provided between the liquid nitrogen storage tank and the nitrogen gas storage tank, at least one vaporizer provided between the liquid argon storage tank and the oxygen-argon mixing cabinet, at least one vaporizer provided between the liquid oxygen storage tank and the oxygen-argon mixing cabinet, at least one vaporizer provided between the liquid oxygen storage tank and the oxygen buffer tank, at least one vaporizer provided between the liquid argon storage tank and the hydrogen-argon mixing cabinet, and at least one vaporizer provided between the liquid argon storage tank and the argon gas storage tank.

[0011] In the above technical solution, it is further preferred that the liquid oxygen storage tank and the oxygen-argon mixing cabinet, as well as the liquid oxygen storage tank and the oxygen buffer tank, share a vaporizer.

[0012] In the above technical solution, it is further preferred that the liquid argon storage tank and the hydrogen-argon mixing cabinet, as well as the liquid argon storage tank and the argon gas storage tank, share a vaporizer.

[0013] In the above technical solution, it is further preferred that the vaporization capacity of each vaporizer is 100 m³ / h.

[0014] In the above technical solution, it is further preferred that the vaporizer is an air bath type vaporizer.

[0015] In the above technical solution, it is further preferred that the nitrogen storage tank, the oxygen-argon mixed gas storage tank, the hydrogen-argon mixed gas storage tank, and the argon storage tank are all equipped with pressure gauges, displacement exhaust valves, and drain valves. The displacement exhaust valves are installed on the top of each tank, and the drain valves are installed on the bottom of each tank.

[0016] In the above technical solution, a further preferred embodiment is that the oxygen-argon ratio in the oxygen-argon mixing cabinet is 2:98.

[0017] In the above technical solution, a further preferred embodiment is that the hydrogen-argon ratio in the hydrogen-argon mixing cabinet is 2:98.

[0018] Compared with the prior art, this application achieves the following beneficial effects:

[0019] The gas supply unit of this application has its tanks and equipment centrally arranged. Only multiple gas supply points need to be set up near the gas-consuming unit to provide various gases to each gas-consuming terminal, realize centralized gas management, make gas supply more convenient, and reduce safety hazards and gas supply management costs. Attached Figure Description

[0020] Figure 1 This application provides a schematic diagram of a centralized gas supply system for cryogenic container production, which includes multiple gases.

[0021] Figure 2 for Figure 1 A schematic diagram of the structure of the nitrogen storage tank in the diagram;

[0022] Among them: 100, a multi-gas centralized gas supply system;

[0023] Gas supply unit;

[0024] 1. Liquid nitrogen storage tank; 2. Nitrogen gas storage tank; 3. Nitrogen buffer tank;

[0025] 5. Liquid argon storage tank; 6. Argon gas storage tank; 7. Argon gas buffer tank;

[0026] 8. Liquid oxygen storage tank; 9. Oxygen buffer tank;

[0027] 9. Oxygen-argon mixing cabinet; 11. Oxygen-argon mixed gas storage tank; 12. Oxygen-argon mixed gas buffer tank;

[0028] Hydrogen cylinders;

[0029] 15. Hydrogen-argon mixing cabinet; 16. Hydrogen-argon mixed gas storage tank; 17. Hydrogen-argon mixed gas buffer tank;

[0030] 18. Propane cylinder; 29. ​​Metal hose; 20. Nitrogen vaporizer; 20. First argon vaporizer; 21. Oxygen vaporizer; 22. Second argon vaporizer; 33. Pressure gauge; 34. Displacement and exhaust valve; 35. Drain valve;

[0031] Gas-powered unit; 19. First gas-shielded welding machine; 21. Second gas-shielded welding machine; 22. Plasma welding machine; 23. Argon arc welding machine; 24. Silver brazing machine;

[0032] 30. Gas distribution unit; 34. Nitrogen supply point; 35. Oxygen supply point; 36. Argon supply point; 37. Propane supply point; 38. Oxygen-argon mixture supply point; 39. Hydrogen-argon mixture supply point; 25. Cryogenic shut-off valve. Detailed Implementation

[0033] To illustrate the technical content, structural features, achieved objectives, and effects of the application in detail, the technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. In the following description, for illustrative purposes, numerous specific details are set forth to provide a detailed description of various exemplary embodiments or implementations of the invention. However, various exemplary embodiments may also be implemented without these specific details or in one or more equivalent arrangements. Furthermore, the various exemplary embodiments may differ, but are not necessarily exclusive. For example, the specific shape, structure, and characteristics of the exemplary embodiments may be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0034] This application provides a centralized gas supply system for multiple gases used in the production of cryogenic containers, such as... Figure 1 As shown, the multi-gas centralized gas supply system 100 includes a gas supply unit 10, a gas consumption unit 20, and a gas distribution unit 30. The gas consumption unit 20 has multiple gas consumption terminals. The gas supply unit 10 can centrally mix multiple gases and provide multiple gases to the gas distribution unit 30. The gas distribution unit 30 has multiple gas supply points to provide different gases to the outside world. The multiple gas consumption terminals of the gas consumption unit 20 are connected to the corresponding gas supply points to obtain the corresponding gases.

[0035] The gas supply unit 10 includes a liquid nitrogen storage tank 1, a nitrogen storage tank 2, a nitrogen buffer tank 3, a liquid argon storage tank 4, an argon storage tank 5, an argon buffer tank 6, a liquid oxygen storage tank 7, an oxygen buffer tank 8, an oxygen-argon mixing cabinet 9, an oxygen-argon mixed gas storage tank 11, an oxygen-argon mixed gas buffer tank 12, a hydrogen cylinder 13, a hydrogen-argon mixing cabinet 14, a hydrogen-argon mixed gas storage tank 15, a hydrogen-argon mixed gas buffer tank 16, and a propane cylinder 17.

[0036] Liquid nitrogen storage tank 1, nitrogen gas storage tank 2 and nitrogen buffer tank 3 are connected in sequence by metal hose 18 to form a liquid nitrogen supply path, which is used to provide nitrogen to the gas-using terminal.

[0037] The liquid oxygen storage tank 7 is connected to the oxygen buffer tank 8 via a metal hose 18 to form an oxygen supply path, which is used to supply oxygen to the gas-using terminal.

[0038] The liquid argon storage tank 4, the argon gas storage tank 5, and the argon gas buffer tank 6 are connected in sequence through the metal hose 18 to form an argon gas supply path, which is used to supply argon gas to the gas-using terminal.

[0039] The oxygen-argon mixing cabinet 9 is connected to both the liquid oxygen storage tank 7 and the liquid argon storage tank 4 via a metal hose 18. The oxygen-argon mixing cabinet 9, the oxygen-argon mixed gas storage tank 11, and the oxygen-argon mixed gas buffer tank 12 are connected in sequence via the metal hose 18 to form an oxygen-argon mixed gas supply path, which is used to supply oxygen-argon mixed gas to the gas-using terminal.

[0040] The hydrogen-argon mixing cabinet 14 is connected to both the liquid argon storage tank 4 and the hydrogen cylinder 13 via a metal hose 18. The hydrogen-argon mixing cabinet 14, the hydrogen-argon mixed gas storage tank 15, and the hydrogen-argon mixed gas buffer tank 16 are connected in sequence to form a hydrogen-argon mixed gas supply path, which is used to provide hydrogen-argon mixed gas to the gas-using terminal.

[0041] The gas-using unit 20 includes a first gas-shielded welding machine 19, a second gas-shielded welding machine 21, a plasma welding machine 22, an argon arc welding machine 23, and a silver brazing machine 24.

[0042] The gas distribution unit 30 is arranged adjacent to the gas-using unit 20. The gas distribution unit 30 includes a plurality of nitrogen supply points 34 connected to the nitrogen buffer tank 3, a plurality of oxygen supply points 35 connected to the oxygen buffer tank 8, a plurality of argon supply points 36 connected to the argon buffer tank 6, at least one propane supply point 37 connected to the propane cylinder 17, a plurality of oxygen-argon mixed gas supply points 38 connected to the oxygen-argon mixed gas buffer tank 12, and a plurality of hydrogen-argon mixed gas supply points 39 connected to the hydrogen-argon mixed gas buffer tank 16.

[0043] The first gas shielded welding machine 19 is a device used for welding circumferential and longitudinal seams of low-temperature containers with thin plates. The welding gas used is an oxygen-argon mixture, and the shielded gas is nitrogen. Therefore, the first gas shielded welding machine 19 is connected to at least one nitrogen gas supply point 34 and at least one oxygen-argon mixture gas supply point 38 through pipelines.

[0044] The second gas shielded welding machine 21 is a device used for welding circumferential and longitudinal seams of cryogenic containers with thicker plates. The welding gas used is a hydrogen-argon mixture, and the shielded gas is nitrogen. Therefore, the second gas shielded welding machine 21 is connected to at least one nitrogen gas supply point 34 and at least one hydrogen-argon mixture gas supply point 39 through pipelines.

[0045] The plasma welding machine 22 is a device for welding the outer circumferential and longitudinal seams of low-temperature containers with thin plates. The welding gas used is argon, which can ensure good welding quality and beautiful shape. The gas used is nitrogen. Therefore, the plasma welding machine 22 is connected to at least one nitrogen gas supply point 34 and at least one argon gas supply point 36 through pipelines.

[0046] Argon arc welding machine 23 is used for welding various components and pipelines of cryogenic containers in special locations. The welding gas is argon, so the argon arc welding machine 23 is connected to at least one argon gas supply point 36 through a pipeline.

[0047] The silver brazing machine 24 is used for welding the vaporized copper tubes inside cryogenic containers. The welding gases are oxygen and propane. Therefore, the silver brazing machine 24 is connected to at least one oxygen supply point 35 and at least one propane supply point 37 through pipelines.

[0048] The tank and equipment of the gas supply unit 10 are centrally arranged in one space, and the multiple gas terminals of the gas consumption unit 20 are centrally arranged in another space. The multiple gas supply points of the gas distribution unit 30 are arranged in the space where the gas consumption unit 20 is located, so as to facilitate the connection of the gas terminals and provide convenience for the gas supply unit 10. Furthermore, the centralized management of the tank and equipment of the gas supply unit 10 improves the gas supply efficiency while reducing the gas supply management cost and reducing safety hazards.

[0049] Cryogenic shut-off valves 25 are installed at multiple nitrogen supply points 34, multiple oxygen supply points 35, multiple argon supply points 36, at least one propane supply point 37, multiple oxygen-argon mixed gas supply points 38, and multiple hydrogen-argon mixed gas supply points 39. The first gas-shielded welding machine 19, the second gas-shielded welding machine 21, the plasma welding machine 22, the argon arc welding machine 23, and the silver brazing machine 24 are connected to their respective supply points via pipelines. Each cryogenic shut-off valve 25 is used to control the fluid flow between each supply point and each welding machine.

[0050] The gas supply unit 10 also includes multiple vaporizers, including a nitrogen vaporizer 26, a first argon vaporizer 27, an oxygen vaporizer 28, and a second argon vaporizer 29.

[0051] A nitrogen vaporizer 26 is provided between the liquid nitrogen storage tank 1 and the nitrogen gas storage tank 2. The nitrogen vaporizer 26 is connected to the liquid nitrogen storage tank 1 and the nitrogen gas storage tank 2 respectively through a metal hose 18. It is used to vaporize the liquid nitrogen output from the liquid nitrogen storage tank 1 into gaseous nitrogen and transport it to the nitrogen gas storage tank 2 for storage.

[0052] A first argon vaporizer 27 is installed between the liquid argon storage tank 4 and the oxygen-argon mixing cabinet 9. The first argon vaporizer 27 is connected to the liquid argon storage tank 4 and the oxygen-argon mixing cabinet 9 respectively through a metal hose 18. The first argon vaporizer 27 vaporizes the liquid argon output from the liquid argon storage tank 4 into gaseous argon and delivers it to the oxygen-argon mixing cabinet 9 for oxygen-argon mixing.

[0053] An oxygen vaporizer 28 is installed between the liquid oxygen storage tank 7 and the oxygen-argon mixing cabinet 9. The oxygen vaporizer 28 is connected to the liquid oxygen storage tank 7 and the oxygen-argon mixing cabinet 9 respectively through a metal hose 18. The oxygen vaporizer 28 vaporizes the liquid oxygen output from the liquid oxygen storage tank 7 into gaseous oxygen and delivers it to the oxygen-argon mixing cabinet 9 to mix with argon gas. The oxygen-argon ratio of the oxygen-argon mixing cabinet 9 is 2:98. The mixed oxygen-argon gas is delivered to the oxygen-argon gas storage tank 11 through the metal hose 18 for storage.

[0054] A second argon vaporizer 29 is installed between the liquid argon storage tank 4 and the hydrogen-argon mixing cabinet 14. The second argon vaporizer 29 is connected to the liquid argon storage tank 4 and the hydrogen-argon mixing cabinet 14 respectively through a metal hose 18. The second argon vaporizer 29 is used to vaporize liquid argon into gaseous argon and transport it to the hydrogen-argon mixing cabinet 14 to mix with hydrogen. The hydrogen-argon ratio in the hydrogen-argon mixing cabinet 14 is 2:98. The mixed hydrogen-argon gas is transported to the hydrogen-argon gas storage tank 15 through the metal hose 18 for storage.

[0055] In this embodiment, the liquid oxygen storage tank 7 and the oxygen buffer tank 8, as well as the liquid oxygen storage tank 7 and the oxygen-argon mixing cabinet 9, share an oxygen vaporizer 28. The oxygen vaporizer 28 is connected to the liquid oxygen storage tank 7, the oxygen buffer tank 8 and the oxygen-argon mixing cabinet 9 through three metal hoses. The oxygen vaporizer 28 vaporizes the liquid oxygen output from the liquid oxygen storage tank 7 into gaseous oxygen and then delivers it to the oxygen buffer tank 8 and the oxygen-argon mixing cabinet 9, which effectively saves energy and reduces the floor space.

[0056] The liquid argon storage tank 4 and the argon gas storage tank 5, as well as the liquid argon storage tank 4 and the hydrogen-argon mixing cabinet 14, share a second argon vaporizer 29. The second argon vaporizer 29 is connected to the liquid argon storage tank 4, the argon gas storage tank 5 and the hydrogen-argon mixing cabinet 14 respectively through three metal hoses 18. The second argon vaporizer 29 vaporizes the liquid argon output from the liquid argon storage tank 4 into gaseous argon and then delivers it to the argon gas storage tank 5 and the hydrogen-argon mixing cabinet 14 respectively, saving energy and equipment floor space.

[0057] Each vaporizer has a vaporization capacity of 100 m³ / h to meet the gas consumption of multiple gas-using terminals. Furthermore, all vaporizers in this application are air-bath type vaporizers, which have high vaporization efficiency and save energy.

[0058] like Figure 2As shown, each of the nitrogen storage tank 2, oxygen-argon mixed gas storage tank 11, hydrogen-argon mixed gas storage tank 15, and argon storage tank 5 is equipped with a pressure gauge 31, a displacement vent valve 32, and a drain valve 33. Each pressure gauge 31 is used to monitor the internal pressure of its corresponding storage tank in real time. The displacement vent valve 32 is installed at the top of each tank and is used to safely and effectively discharge the existing gas in the tank during initial filling or when the gas needs to be replaced, ensuring the purity of the gas inside. It can also be opened during filling to release pressure. The drain valve 33 is installed at the bottom of each tank. Each pressure gauge 31 is connected to the corresponding displacement vent valve 32 and the vaporizer upstream of the corresponding storage tank. When the pressure gauge 31 detects that the pressure inside the corresponding storage tank is too high, it transmits a signal to the upstream vaporizer and the corresponding displacement vent valve 32. The upstream vaporizer stops working to stop supplying gas to the storage tank, and the displacement vent valve opens to release pressure, ensuring safety during the gas supply process.

[0059] Continue to refer to the appendix Figure 1 Liquid nitrogen in liquid nitrogen storage tank 1 is vaporized into nitrogen gas in connected nitrogen vaporizer 26. The nitrogen gas is then transported to nitrogen storage tank 2 for storage, and a portion of the nitrogen gas is transported to nitrogen buffer tank 3 to stabilize the pressure when supplying gas to the gas-using terminal. When the cryogenic shut-off valve 25 at nitrogen supply point 34 is opened, the nitrogen gas in nitrogen buffer tank 3 is transported from each of the opened nitrogen supply points 34 to the first gas shielded welding machine 19, the second gas shielded welding machine 21, and the plasma welding machine 22, respectively, and the nitrogen gas is used as the shielded gas.

[0060] Liquid argon in liquid argon storage tank 4 is vaporized into argon gas in the connected first argon vaporizer 27 and then transported to oxygen-argon mixing cabinet 9. Liquid oxygen in liquid oxygen storage tank 7 is vaporized into oxygen in the connected oxygen vaporizer 28. Part of the oxygen is transported to oxygen-argon mixing cabinet 9, and the other part is transported to oxygen buffer tank 8. Oxygen-argon mixing cabinet 9 mixes oxygen and argon gas at a ratio of 2:98. The mixed oxygen-argon gas is stored in oxygen-argon gas storage tank 11, and part of the mixed oxygen-argon gas is transported to oxygen-argon gas buffer tank 12. When the cryogenic shut-off valve 25 at oxygen-argon gas supply point 38 is opened, oxygen-argon gas buffer tank 12 supplies oxygen-argon gas to the first gas-shielded welding machine 19 as welding gas for welding.

[0061] Liquid argon in liquid argon storage tank 4 enters the second argon vaporizer 29 and is vaporized into argon gas. Part of the vaporized argon gas is transported to the hydrogen-argon mixing cabinet 14, and the other part enters the argon storage tank 5. Hydrogen gas in hydrogen cylinder 13 is introduced into the hydrogen-argon mixing cabinet 14 through metal hose 18. The hydrogen-argon mixing cabinet 14 mixes hydrogen and argon gas at a ratio of 2:98. The mixed hydrogen-argon gas enters the hydrogen-argon gas storage tank 15 for storage. Part of the mixed hydrogen-argon gas enters the hydrogen-argon gas buffer tank 16. When the cryogenic shut-off valve 25 at the hydrogen-argon gas supply point 39 is opened, the hydrogen-argon gas buffer tank 16 provides hydrogen-oxygen mixed gas to the second gas shielded welding machine 21 as welding gas for welding.

[0062] Argon gas in argon gas storage tank 5 enters argon gas buffer tank 6. When the cryogenic shut-off valve 25 at argon gas supply point 36 is opened, argon gas buffer tank 6 supplies argon gas to plasma welding machine 22 and argon arc welding machine 23 as welding gas for welding.

[0063] When the cryogenic shut-off valve 25 at the oxygen supply point 35 is opened, the oxygen buffer tank 8 supplies oxygen to the silver brazing machine 24; when the cryogenic shut-off valve at the propane supply point 37 is opened, the propane cylinder 17 supplies propane to the silver brazing machine 24. Oxygen and propane are used as welding gases for the silver brazing machine 24 to perform welding.

[0064] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this application. Various changes and modifications can be made without departing from the spirit and scope of this application. The scope of protection claimed by this application is defined by the appended claims, specification, and their equivalents.

Claims

1. A centralized gas supply system for multiple gases used in the production of cryogenic containers, characterized in that, include The gas-using unit includes a first gas-shielded welding machine, a second gas-shielded welding machine, a plasma welding machine, an argon arc welding machine, and a silver brazing machine; The gas supply unit includes a centrally arranged liquid nitrogen storage tank, nitrogen storage tank, nitrogen buffer tank, liquid argon storage tank, argon storage tank, argon buffer tank, liquid oxygen storage tank, oxygen buffer tank, oxygen-argon mixing cabinet, oxygen-argon mixed gas storage tank, oxygen-argon mixed gas buffer tank, hydrogen cylinder, hydrogen-argon mixing cabinet, hydrogen-argon mixed gas storage tank, hydrogen-argon mixed gas buffer tank, and propane cylinder; the liquid nitrogen storage tank, nitrogen storage tank, and nitrogen buffer tank are sequentially connected via flexible metal hoses; the liquid oxygen storage tank is connected to the oxygen buffer tank via a flexible metal hose. The liquid argon storage tank, argon gas storage tank, and argon gas buffer tank are connected sequentially via flexible metal hoses; the oxygen-argon mixing cabinet is connected to both the liquid oxygen storage tank and the liquid argon storage tank via flexible metal hoses, and the oxygen-argon mixing cabinet, oxygen-argon mixed gas storage tank, and oxygen-argon mixed gas buffer tank are connected sequentially via flexible metal hoses; the hydrogen-argon mixing cabinet is connected to both the liquid argon storage tank and the hydrogen cylinder via flexible metal hoses, and the hydrogen-argon mixing cabinet, hydrogen-argon mixed gas storage tank, and hydrogen-argon mixed gas buffer tank are connected sequentially; and A gas distribution unit is arranged adjacent to the gas-using unit. The gas distribution unit includes multiple nitrogen supply points connected to the nitrogen buffer tank, multiple oxygen supply points connected to the oxygen buffer tank, multiple argon supply points connected to the argon buffer tank, at least one propane supply point connected to the propane cylinder, multiple oxygen-argon mixed gas supply points connected to the oxygen-argon mixed gas buffer tank, and multiple hydrogen-argon mixed gas supply points connected to the hydrogen-argon mixed gas buffer tank. The first gas-shielded welding machine is connected to at least one nitrogen supply point and at least one oxygen-argon mixed gas supply point; the second gas-shielded welding machine is connected to at least one nitrogen supply point and at least one hydrogen-argon mixed gas supply point; the plasma welding machine is connected to at least one nitrogen supply point and at least one argon supply point; the argon arc welding machine is connected to at least one argon supply point; and the silver brazing machine is connected to at least one oxygen supply point and at least one propane supply point.

2. The multi-gas centralized gas supply system according to claim 1, characterized in that, Each of the multiple nitrogen gas supply points, multiple oxygen gas supply points, multiple argon gas supply points, at least one propane gas supply point, multiple oxygen-argon mixed gas supply points, and multiple hydrogen-argon mixed gas supply points is equipped with a cryogenic shut-off valve.

3. The multi-gas centralized gas supply system according to claim 1, characterized in that, The gas supply unit further includes multiple vaporizers. At least one vaporizer is provided between the liquid nitrogen storage tank and the nitrogen gas storage tank. At least one vaporizer is provided between the liquid argon storage tank and the oxygen-argon mixing cabinet. At least one vaporizer is provided between the liquid oxygen storage tank and the oxygen-argon mixing cabinet. At least one vaporizer is provided between the liquid oxygen storage tank and the oxygen buffer tank. At least one vaporizer is provided between the liquid argon storage tank and the hydrogen-argon mixing cabinet. At least one vaporizer is provided between the liquid argon storage tank and the argon gas storage tank.

4. The multi-gas centralized gas supply system according to claim 3, characterized in that, The liquid oxygen storage tank and the oxygen-argon mixing cabinet, as well as the liquid oxygen storage tank and the oxygen buffer tank, share a vaporizer.

5. The multi-gas centralized gas supply system according to claim 3, characterized in that, The liquid argon storage tank and the hydrogen-argon proportioning cabinet, as well as the liquid argon storage tank and the argon gas storage tank, share a vaporizer.

6. The multi-gas centralized gas supply system according to claim 3, characterized in that, The vaporization capacity of each of the aforementioned vaporizers is 100 m³ / h.

7. The multi-gas centralized gas supply system according to claim 3, characterized in that, The vaporizer is an air bath type vaporizer.

8. The multi-gas centralized gas supply system according to claim 1, characterized in that, The nitrogen storage tank, the oxygen-argon mixed gas storage tank, the hydrogen-argon mixed gas storage tank, and the argon storage tank are all equipped with pressure gauges, displacement exhaust valves, and drain valves. The displacement exhaust valves are installed on the top of each tank, and the drain valves are installed on the bottom of each tank.

9. The multi-gas centralized gas supply system according to claim 1, characterized in that, The oxygen-argon ratio in the oxygen-argon mixing cabinet is 2:

98.

10. The multi-gas centralized gas supply system according to claim 1, characterized in that, The hydrogen-argon ratio in the hydrogen-argon mixing cabinet is 2:98.

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