Multi-gas centralized gas supply system for low-temperature container production

Abstract

The invention discloses a multi-gas centralized gas supply system for low-temperature container production, which comprises a gas utilization unit, a gas supply unit and a gas distribution unit, and the gas utilization unit comprises a first gas shield welding machine, a second gas shield welding machine, a plasma welding machine, an argon arc welding machine and a silver brazing tin welding machine; the gas supply unit comprises a 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 proportioning cabinet, an oxygen-argon mixed gas storage tank, an oxygen-argon mixed gas buffer tank, a hydrogen steel cylinder, a hydrogen-argon proportioning cabinet, a hydrogen-argon mixed gas storage tank, a hydrogen-argon mixed gas buffer tank and a propane steel cylinder which are arranged in a centralized manner; the gas distribution unit comprises a nitrogen gas supply point, an oxygen gas supply point, an argon gas supply point, a propane gas supply point, an oxygen-argon mixed gas supply point and a hydrogen-argon mixed gas supply point which are adjacent to the gas utilization unit; according to the invention, centralized management of gas is realized, so that gas supply is more convenient, and potential safety hazards and gas supply management cost are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of gas supply systems, and in particular to a centralized gas supply system for multiple gases used in the production of cryogenic containers. Background Art

[0002] Currently, the production of cryogenic containers requires a wide variety of gases. Most cryogenic container manufacturers use nitrogen, argon, oxygen, oxygen-argon mixtures, and hydrogen-argon mixtures, but they use small cylinders and Dewar flasks placed at workstations to supply gas. This can easily lead to confusion in gas usage, inability to effectively manage the gases, low efficiency, and other large losses. Although some gas supply methods use storage tanks, these methods are single and have low gas utilization rates. Furthermore, the numerous bottles and cans are difficult to manage in the workshop, often resulting in sudden gas supply interruptions or gas waste. There are many gases such as oxygen, acetylene, nitrogen, and argon, many of which are flammable and explosive, which can easily create significant safety hazards and pose certain disadvantages to both companies and employees. Summary of the Invention

[0003] In order to solve the above technical problems, the purpose of this application is to provide a centralized gas supply system for multiple gases used in the production of cryogenic containers with centralized gas management and convenient gas supply.

[0004] To achieve the above objectives, the present application adopts the following technical solution: a centralized gas supply system for multiple gases used in the production of cryogenic containers, comprising Gas-using units, including a first gas shielded welding machine, a second gas shielded welding machine, a plasma welding machine, an argon arc welding machine and a silver soldering 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 proportioning cabinet, an oxygen-argon mixed gas storage tank, an oxygen-argon mixed gas buffer tank, a hydrogen cylinder, a hydrogen-argon proportioning cabinet, a hydrogen-argon mixed gas storage tank, a hydrogen-argon mixed gas buffer tank, and a propane cylinder; the liquid nitrogen storage tank, the nitrogen storage tank, and the nitrogen buffer tank are sequentially connected through a metal hose; the liquid oxygen storage tank is connected to the oxygen buffer tank through a metal hose; The liquid argon storage tank, argon gas storage tank and argon buffer tank are connected in sequence through metal hoses; the oxygen-argon proportioning cabinet is connected to the liquid oxygen storage tank and the liquid argon storage tank at the same time through a metal hose, and the oxygen-argon proportioning cabinet, oxygen-argon mixed gas storage tank and oxygen-argon mixed gas buffer tank are connected in sequence through a metal hose; the hydrogen-argon proportioning cabinet is connected to the liquid argon storage tank and the hydrogen cylinder at the same time through a metal hose, and the hydrogen-argon proportioning cabinet, hydrogen-argon mixed gas storage tank and the hydrogen-argon mixed gas buffer tank are connected in sequence; and a gas distribution unit, arranged adjacent to the gas-using unit, comprising a plurality of nitrogen supply points in communication with the nitrogen buffer tank, a plurality of oxygen supply points in communication with the oxygen buffer tank, a plurality of argon supply points in communication with the argon buffer tank, at least one propane supply point in communication with the propane cylinder, a plurality of oxygen-argon mixed gas supply points in communication with the oxygen-argon mixed gas buffer tank, and a plurality of hydrogen-argon mixed gas supply points in communication with the hydrogen-argon mixed gas buffer tank; Among them, the first gas shielded welding machine is connected to at least one of the nitrogen gas supply points and at least one of the oxygen-argon mixed gas supply points; the second gas shielded welding machine is connected to at least one of the nitrogen gas supply points and at least one of the hydrogen-argon mixed gas supply points; the plasma welding machine is connected to at least one of the nitrogen gas supply points and at least one of the argon gas supply points; the argon arc welding machine is connected to at least one of the argon gas supply points, and the silver soldering machine is connected to at least one of the oxygen gas supply points and at least one of the propane gas supply points.

[0005] In the above technical solution, it is further preferred that low-temperature stop valves are respectively installed at the multiple nitrogen supply points, multiple oxygen supply points, multiple argon supply points, at least one propane supply point, multiple oxygen-argon mixed gas supply points and multiple hydrogen-argon mixed gas supply points.

[0006] In the above technical solution, it is further preferred that the gas supply unit further includes a plurality of vaporizers, at least one vaporizer is provided between the liquid nitrogen storage tank and the nitrogen storage tank, at least one vaporizer is provided between the liquid argon storage tank and the oxygen-argon proportioning cabinet, at least one vaporizer is provided between the liquid oxygen storage tank and the oxygen-argon proportioning 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 proportioning cabinet, and at least one vaporizer is provided between the liquid argon storage tank and the argon storage tank.

[0007] In the above technical solution, it is further preferred that the vaporizer is shared between the liquid oxygen storage tank and the oxygen-argon proportioning cabinet, and between the liquid oxygen storage tank and the oxygen buffer tank.

[0008] In the above technical solution, it is further preferred that the liquid argon storage tank and the hydrogen-argon proportioning cabinet and the liquid argon storage tank and the argon gas storage tank share one vaporizer.

[0009] In the above technical solution, it is further preferred that the vaporization capacity of each of the vaporizers is 100 m³ / h.

[0010] In the above technical solution, it is further preferred that the vaporizer is an air bath vaporizer.

[0011] In the above technical solution, it is further preferred that the nitrogen gas storage tank, the oxygen-argon mixed gas storage tank, the hydrogen-argon mixed gas storage tank and the argon gas storage tank are all equipped with a pressure gauge, a displacement exhaust valve and a drain valve, the displacement exhaust valve is installed on the top of each tank body, and the drain valve is installed at the bottom of each tank body.

[0012] In the above technical solution, it is further preferred that the oxygen-argon ratio of the oxygen-argon matching cabinet is 2:98.

[0013] In the above technical solution, it is further preferred that the hydrogen-argon ratio of the hydrogen-argon matching cabinet is 2:98.

[0014] Compared with the prior art, this application achieves the following beneficial effects: The tanks and equipment of the gas supply unit of this application are arranged centrally. It is only necessary to set up multiple gas supply points near the gas-consuming units to provide multiple gases to each gas-consuming terminal, realize centralized gas management, make gas supply more convenient, and reduce safety hazards and gas supply management costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a centralized gas supply system for multiple gases used in the production of cryogenic containers provided in an embodiment of the present application; Figure 2 for Figure 1 Schematic diagram of the structure of the nitrogen gas storage tank; Among them: 100, multiple gas centralized gas supply systems; Air supply unit; Liquid nitrogen storage tank; 2. Nitrogen gas storage tank; 3. Nitrogen buffer tank; Liquid argon storage tank; 5. Argon gas storage tank; 6. Argon gas buffer tank; Liquid oxygen storage tank; 8. Oxygen buffer tank; 9. Oxygen-argon proportioning cabinet; 11. Oxygen-argon mixed gas storage tank; 12. Oxygen-argon mixed gas buffer tank; Hydrogen cylinders; Hydrogen-argon proportioning cabinet; 15. Hydrogen-argon mixed gas storage tank; 16. Hydrogen-argon mixed gas buffer tank; Propane cylinder; 18. Metal hose; 26. Nitrogen vaporizer; 27. First argon vaporizer; 28. Oxygen vaporizer; 29. ​​Second argon vaporizer; 31. Pressure gauge; 32. Displacement exhaust valve; 33. Drain valve; Gas unit; 19. First gas shielded welding machine; 21. Second gas shielded welding machine; 22. Plasma welding machine; 23. Argon arc welding machine; 24. Silver soldering machine; 30. Gas distribution unit; 34. Nitrogen supply point; 35. Oxygen supply point; 36. Argon supply point; 37. Propane supply point; 38. Oxygen-argon mixed gas supply point; 39. Hydrogen-argon mixed gas supply point; 25. Cryogenic shut-off valve. DETAILED DESCRIPTION

[0016] In order to describe the technical content, structural features, achieved purposes and effects of the application in detail, the technical solutions in the embodiments of the application will be described below in conjunction with the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all of the embodiments. In the following description, for the purpose of explanation, many 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 the case of one or more equivalent arrangements. In addition, various exemplary embodiments may be different, but are not necessarily exclusive. For example, without departing from the inventive concept, the specific shape, structure and characteristics of the exemplary embodiment may be used or implemented in another exemplary embodiment.

[0017] The embodiment of the present application provides a multiple gas centralized gas supply system for cryogenic container production, such as Figure 1 As shown, the multiple gas centralized gas supply system 100 includes a gas supply unit 10, a gas using unit 20 and a gas distribution unit 30. The gas using unit 20 has multiple gas using terminals. The gas supply unit 10 can centrally proportion 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. The multiple gas using terminals of the gas using unit 20 are connected to the corresponding gas supply points to obtain corresponding gases.

[0018] 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 proportioning 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 proportioning cabinet 14, a hydrogen-argon mixed gas storage tank 15, a hydrogen-argon mixed gas buffer tank 16 and a propane cylinder 17.

[0019] The liquid nitrogen storage tank 1, the nitrogen gas storage tank 2 and the nitrogen buffer tank 3 are connected in sequence through a metal hose 18 to form a liquid nitrogen supply path for providing nitrogen to the gas-using terminal.

[0020] The liquid oxygen storage tank 7 is connected to the oxygen buffer tank 8 through a metal hose 18 to form an oxygen supply path for providing oxygen to the gas-using terminal.

[0021] The liquid argon storage tank 4, the argon gas storage tank 5 and the argon buffer tank 6 are connected in sequence through a metal hose 18 to form an argon gas supply path for providing argon gas to the gas-using terminal.

[0022] The oxygen-argon proportioning cabinet 9 is connected to the liquid oxygen storage tank 7 and the liquid argon storage tank 4 at the same time through the metal hose 18. The oxygen-argon proportioning cabinet 9, the oxygen-argon mixed gas storage tank 11 and the oxygen-argon mixed gas buffer tank 12 are connected in sequence through the metal hose 18 to form an oxygen-argon mixed gas supply path for providing the oxygen-argon mixed gas to the gas-using terminal.

[0023] The hydrogen-argon proportioning cabinet 14 is connected to the liquid argon storage tank 4 and the hydrogen cylinder 13 through a metal hose 18. The hydrogen-argon proportioning 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 for providing hydrogen-argon mixed gas to the gas-using terminal.

[0024] The gas unit 20 includes a first gas shielded welder 19 , a second gas shielded welder 21 , a plasma welder 22 , an argon arc welder 23 and a silver soldering machine 24 .

[0025] The gas distribution unit 30 is arranged adjacent to the gas consumption unit 20, and 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.

[0026] The first gas shielded welding machine 19 is a device for welding circumferential seams and longitudinal seams of low-temperature containers with thin plate thickness. 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.

[0027] The second gas shielded welding machine 21 is a device used for welding circumferential seams and longitudinal seams of low-temperature containers with relatively thick 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.

[0028] The plasma welder 22 is a device used for welding the outer circumferential seams and longitudinal seams of low-temperature containers with thin plate thickness. The welding gas used is argon, which can ensure good welding quality and beautiful shaping. The gas used is nitrogen, so the plasma welder 22 is connected to at least one nitrogen supply point 34 and at least one argon supply point 36 through pipelines.

[0029] The argon arc welder 23 is used for welding various parts, pipelines and other special positions of the cryogenic container. The welding gas is argon, so the argon arc welder 23 is connected to at least one argon gas supply point 36 through a pipeline.

[0030] The silver soldering machine 24 is used for welding vaporized copper tubes built into low-temperature containers. The welding gases are oxygen and propane, so the silver soldering machine 24 is connected to at least one oxygen supply point 35 and at least one propane supply point 37 through pipelines.

[0031] The tank body and equipment of the gas supply unit 10 are concentrated in one space, the multiple gas terminals of the gas consumption unit 20 are concentrated in another space, and 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, thereby providing convenience for the gas supply of the gas supply unit 10. The tank body and equipment of the gas supply unit 10 are centrally managed, which improves the gas supply efficiency while reducing the management cost of the gas supply and reduces safety hazards.

[0032] 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 welder 19, the second gas shielded welder 21, the plasma welder 22, the argon arc welder 23, and the silver soldering machine 24 are connected to the corresponding gas supply points through pipelines. Each cryogenic shut-off valve 25 is used to control the flow between each gas supply point and each welder.

[0033] The gas supply unit 10 further includes a plurality of vaporizers including a nitrogen vaporizer 26 , a first argon vaporizer 27 , an oxygen vaporizer 28 , and a second argon vaporizer 29 .

[0034] A nitrogen vaporizer 26 is provided between the liquid nitrogen storage tank 1 and the nitrogen gas storage tank 2, and 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, and is used to gasify 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.

[0035] A first argon vaporizer 27 is provided between the liquid argon storage tank 4 and the oxygen-argon proportioning cabinet 9, and the first argon vaporizer 27 is connected to the liquid argon storage tank 4 and the oxygen-argon proportioning 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 transports it to the oxygen-argon proportioning cabinet 9 for proportioning of the oxygen-argon mixed gas.

[0036] An oxygen vaporizer 28 is provided between the liquid oxygen storage tank 7 and the oxygen-argon proportioning cabinet 9, and the oxygen vaporizer 28 is connected to the liquid oxygen storage tank 7 and the oxygen-argon proportioning 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 transports it to the oxygen-argon proportioning cabinet 9 for proportioning with argon. The oxygen-argon ratio of the oxygen-argon proportioning cabinet 9 is 2:98. The proportioned oxygen-argon mixed gas is transported to the oxygen-argon mixed gas storage tank 11 through the metal hose 18 for storage.

[0037] A second argon vaporizer 29 is provided between the liquid argon storage tank 4 and the hydrogen-argon proportioning cabinet 14, and the second argon vaporizer 29 is connected to the liquid argon storage tank 4 and the hydrogen-argon proportioning cabinet 14 respectively through a metal hose 18. The second argon vaporizer 29 is used to vaporize the liquid argon into gaseous argon and transport it to the hydrogen-argon proportioning cabinet 14 to proportion a hydrogen-argon mixed gas with hydrogen. The hydrogen-argon ratio of the hydrogen-argon proportioning cabinet 14 is 2:98. The proportioned hydrogen-argon mixed gas is transported to the hydrogen-argon mixed gas storage tank 15 through the metal hose 18 for storage.

[0038] In the embodiment of the present application, 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 matching 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 matching 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 transports it to the oxygen buffer tank 8 and the oxygen-argon matching cabinet 9, respectively, thereby effectively saving energy and reducing floor space.

[0039] A second argon vaporizer 29 is shared between the liquid argon storage tank 4 and the argon gas storage tank 5, as well as between the liquid argon storage tank 4 and the hydrogen-argon proportioning cabinet 14. The second argon vaporizer 29 is connected to the liquid argon storage tank 4, the argon gas storage tank 5 and the hydrogen-argon proportioning 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 transports it to the argon gas storage tank 5 and the hydrogen-argon proportioning cabinet 14 respectively, saving energy and equipment floor space.

[0040] The vaporization capacity of each vaporizer is 100m³ / h to meet the gas consumption of multiple gas terminals, and the multiple vaporizers in this application are all air bath type vaporizers, which have high vaporization efficiency and save energy.

[0041] like Figure 2 As shown, the nitrogen gas storage tank 2, oxygen-argon mixture gas storage tank 11, hydrogen-argon mixture gas storage tank 15, and argon gas storage tank 5 are each equipped with a pressure gauge 31, a displacement exhaust valve 32, and a drain valve 33. Each pressure gauge 31 is used to monitor the internal pressure of the corresponding gas storage tank in real time. The displacement exhaust valve 32 is installed at the top of each tank body and is used to safely and effectively discharge the existing gas in the tank during initial filling or when the gas in the tank needs to be replaced, ensuring the purity of the gas inside the tank. It can also be opened to relieve pressure during the filling process. The drain valve 33 is installed at the bottom of each tank body. Each pressure gauge 31 is signal-connected to the corresponding displacement exhaust valve 32 and the corresponding vaporizer upstream of the gas storage tank. When the pressure gauge 31 detects that the pressure in the corresponding gas storage tank is too high, it transmits a signal to the upstream vaporizer and the corresponding displacement exhaust valve 32, causing the upstream vaporizer to stop operating and stop supplying gas to the gas storage tank, and the displacement exhaust valve opens to relieve pressure, ensuring safety during the gas supply process.

[0042] Continue to refer to the attached Figure 1 The liquid nitrogen in the liquid nitrogen storage tank 1 enters the connected nitrogen vaporizer 26 and is gasified into nitrogen. The nitrogen is transported to the nitrogen storage tank 2 for storage, and part of the nitrogen is transported to the nitrogen buffer tank 3 to stabilize the pressure when supplying gas to the gas terminal; when the low-temperature stop valve 25 at the nitrogen supply point 34 is opened, the nitrogen in the nitrogen buffer tank 3 is respectively transported from each opened nitrogen supply point 34 to the first gas shielded welding machine 19, the second gas shielded welding machine 21, and the plasma welding machine 22, and the nitrogen is used as the shielded gas.

[0043] The liquid argon in the liquid argon storage tank 4 enters the connected first argon vaporizer 27, where it is vaporized into argon and transported to the oxygen-argon proportioning cabinet 9. The liquid oxygen in the liquid oxygen storage tank 7 enters the connected oxygen vaporizer 28, where it is vaporized into oxygen. Part of the oxygen is transported to the oxygen-argon proportioning cabinet 9, and the remaining part is transported to the oxygen buffer tank 8. The oxygen-argon proportioning cabinet 9 mixes the oxygen and argon in a ratio of 2:98. The mixed oxygen-argon gas enters the oxygen-argon mixed gas storage tank 11 for storage, and part of the mixed oxygen-argon gas enters the oxygen-argon mixed gas buffer tank 12. When the low-temperature shut-off valve 25 at the oxygen-argon mixed gas supply point 38 is opened, the oxygen-argon mixed gas buffer tank 12 supplies the oxygen-argon mixed gas to the first gas shielded welder 19 as welding gas for use by the first gas shielded welder 19.

[0044] The liquid argon in the liquid argon storage tank 4 enters the second argon vaporizer 29 and is vaporized into argon gas, part of which is transported to the hydrogen-argon proportioning cabinet 14, and the other part enters the argon storage tank 5; the hydrogen in the hydrogen cylinder 13 is input into the hydrogen-argon proportioning cabinet 14 through the metal hose 18, and the hydrogen-argon proportioning cabinet 14 proportions the hydrogen and argon in a ratio of 2:98. The proportioned hydrogen-argon mixture enters the hydrogen-argon mixture storage tank 15 for storage, and part of the hydrogen-argon mixture enters the hydrogen-argon mixture buffer tank 16. When the low-temperature stop valve 25 at the hydrogen-argon mixture supply point 39 is opened, the hydrogen-argon mixture buffer tank 16 provides the second gas shielded welding machine with a hydrogen-oxygen mixture as a welding gas for the second gas shielded welding machine 21 to be used for welding.

[0045] The argon gas in the argon storage tank 5 enters the argon buffer tank 6. When the low-temperature stop valve 25 at the argon supply point 36 is opened, the argon buffer tank 6 provides argon gas to the plasma welder 22 and the argon arc welder 23 as welding gas for use by the plasma welder 22 and the argon arc welder 23 for welding.

[0046] When the low-temperature stop valve 25 at the oxygen supply point 35 is opened, the oxygen buffer tank 8 supplies oxygen to the silver soldering machine 24; when the low-temperature stop valve at the propane supply point 37 is opened, the propane cylinder 17 supplies propane to the silver soldering machine 24, and oxygen and propane are used as welding gases for the silver soldering machine 24 to use for welding.

[0047] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments. The above embodiments and descriptions are only for illustrative purposes. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. The scope of protection claimed in the present application is defined by the appended claims, the description and their equivalents.

Claims

1. A multiple gas centralized gas supply system for cryogenic container production, characterized in that: include Gas-using units, including a first gas shielded welding machine, a second gas shielded welding machine, a plasma welding machine, an argon arc welding machine and a silver soldering 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 proportioning cabinet, an oxygen-argon mixed gas storage tank, an oxygen-argon mixed gas buffer tank, a hydrogen cylinder, a hydrogen-argon proportioning cabinet, a hydrogen-argon mixed gas storage tank, a hydrogen-argon mixed gas buffer tank, and a propane cylinder; the liquid nitrogen storage tank, the nitrogen storage tank, and the nitrogen buffer tank are sequentially connected through a metal hose; the liquid oxygen storage tank is connected to the oxygen buffer tank through a metal hose; The liquid argon storage tank, argon gas storage tank and argon buffer tank are connected in sequence through metal hoses; the oxygen-argon proportioning cabinet is connected to the liquid oxygen storage tank and the liquid argon storage tank at the same time through a metal hose, and the oxygen-argon proportioning cabinet, oxygen-argon mixed gas storage tank and oxygen-argon mixed gas buffer tank are connected in sequence through a metal hose; the hydrogen-argon proportioning cabinet is connected to the liquid argon storage tank and the hydrogen cylinder at the same time through a metal hose, and the hydrogen-argon proportioning cabinet, hydrogen-argon mixed gas storage tank and the hydrogen-argon mixed gas buffer tank are connected in sequence; and a gas distribution unit, arranged adjacent to the gas-using unit, comprising a plurality of nitrogen supply points in communication with the nitrogen buffer tank, a plurality of oxygen supply points in communication with the oxygen buffer tank, a plurality of argon supply points in communication with the argon buffer tank, at least one propane supply point in communication with the propane cylinder, a plurality of oxygen-argon mixed gas supply points in communication with the oxygen-argon mixed gas buffer tank, and a plurality of hydrogen-argon mixed gas supply points in communication with the hydrogen-argon mixed gas buffer tank; Among them, the first gas shielded welding machine is connected to at least one of the nitrogen gas supply points and at least one of the oxygen-argon mixed gas supply points; the second gas shielded welding machine is connected to at least one of the nitrogen gas supply points and at least one of the hydrogen-argon mixed gas supply points; the plasma welding machine is connected to at least one of the nitrogen gas supply points and at least one of the argon gas supply points; the argon arc welding machine is connected to at least one of the argon gas supply points, and the silver soldering machine is connected to at least one of the oxygen gas supply points and at least one of the propane gas supply points.

2. The multiple gas centralized gas supply system according to claim 1, characterized in that: 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 are respectively equipped with low-temperature stop valves.

3. The multiple gas centralized gas supply system according to claim 1, characterized in that: The gas supply unit also includes multiple vaporizers, at least one vaporizer is provided between the liquid nitrogen storage tank and the nitrogen storage tank, at least one vaporizer is provided between the liquid argon storage tank and the oxygen-argon proportioning cabinet, at least one vaporizer is provided between the liquid oxygen storage tank and the oxygen-argon proportioning 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 proportioning cabinet, and at least one vaporizer is provided between the liquid argon storage tank and the argon storage tank.

4. The multiple gas centralized gas supply system according to claim 3, characterized in that: The liquid oxygen storage tank and the oxygen-argon proportioning cabinet share one vaporizer, as do the liquid oxygen storage tank and the oxygen buffer tank.

5. The multiple 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 one vaporizer.

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

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

8. The multiple gas centralized gas supply system according to claim 1, characterized in that: The nitrogen gas storage tank, oxygen-argon mixed gas storage tank, hydrogen-argon mixed gas storage tank and the argon gas 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 body, and the drain valves are installed at the bottom of each tank body.

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

98.

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

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