Automatic switching continuous uninterrupted argon supply system

Abstract

This invention relates to the field of chemical automation technology, specifically to an automatic switching continuous gas supply system for argon, comprising a gas source module including a liquid argon vacuum storage tank and a multi-parameter interlocking control system. The liquid argon vacuum storage tank is connected to an ambient temperature vaporizer, and the downstream end of the ambient temperature vaporizer is connected to a gas buffer tank. The output end of the gas buffer tank is connected to an argon pressure regulating valve group. The liquid argon vacuum storage tank includes a tank body and a self-pressurization control system. The liquid argon is pressurized to 1.0 MPa by the self-pressurization control system and then enters the ambient temperature vaporizer to complete the gas-liquid conversion. The vaporized argon is depressurized to 0.65 MPa by the argon pressure regulating valve group and then supplied to the electroslag furnace at the gas-consuming terminal. This system combines two modes: gravity-driven self-drainage of the storage tank and passive vaporization pressurization by the self-pressurizer. When the tank pressure is acceptable but the flow rate is insufficient, gravity-driven self-drainage is relied upon. When the pressure is below the operating threshold, the self-pressurization control system is triggered to utilize ambient waste heat for vaporization pressurization.

Description

Technical Field

[0001] This invention relates to the field of chemical automation equipment technology, specifically to an argon gas automatic switching continuous uninterrupted gas supply system. Background Technology

[0002] The use of argon in electroslag remelting (ESR) steelmaking is a key process for improving quality and efficiency. By creating an inert protective environment, it achieves: higher purity (reducing oxide inclusions); lower gas content (effectively removing hydrogen and controlling nitrogen); superior mechanical properties (eliminating hydrogen embrittlement and improving toughness and fatigue life); and more precise composition control (preventing alloy element burn-off). For the production of specialty steels and alloys pursuing top-quality products, argon-protected ESR is a standard and indispensable technology. Therefore, ensuring stable operation of the steelmaking process and developing automatic switching for continuous, uninterrupted argon supply are fundamental conditions for guaranteeing the production of high-quality steel.

[0003] Therefore, to ensure the supply of argon to existing electroslag furnaces, this invention constructs a new liquid argon vaporization device that meets the above requirements. The liquid argon vaporization device employs a combination of a liquid argon vacuum storage tank, a vaporizer, an argon buffer tank, and an argon pressure reducing valve assembly to supply gas to users. It ensures the storage of cryogenic liquid transferred from external tank trucks to the cryogenic tank. Automatic switching valves and remote instruments are used to achieve automatic switching and uninterrupted gas supply. This replaces the traditional manned operation mode, achieving unattended operation. Summary of the Invention

[0004] To achieve the above objectives, the technical solution adopted in this invention is as follows:

[0005] An automatic switching continuous argon gas supply system includes a gas source module, which comprises a liquid argon vacuum storage tank and a multi-parameter interlocking control system. The liquid argon vacuum storage tank is connected to an ambient air vaporizer, and the rear end of the ambient air vaporizer is connected to a gas buffer tank. The output end of the gas buffer tank is connected to an argon pressure regulating valve group. The liquid argon vacuum storage tank includes a tank body and a self-pressurization control system. The liquid argon is pressurized to 1.0 MPa by the self-pressurization control system and then enters the ambient air vaporizer to complete the gas-liquid conversion. The vaporized argon is depressurized to 0.65 MPa by the argon pressure regulating valve group and then supplied to the gas-consuming electroslag furnace.

[0006] The storage tank body is equipped with liquid phase pipelines and gas phase pipelines. During the filling stage of the storage tank body, liquid is introduced in a top-bottom parallel manner by spraying pre-cooling through the top liquid inlet valve and gravity flow through the bottom liquid inlet valve. After the storage tank and pipelines are pre-cooled, full liquid filling is carried out.

[0007] The self-pressurization control system consists of an ambient temperature booster, a self-regulating valve, a manual shut-off valve, and a safety valve. The ambient temperature booster is located at the bottom of the liquid argon vacuum storage tank. A regulating valve is installed next to the ambient temperature booster, with a pressure range of 0.8~1.2MPa. The regulating valve opens when the pressure inside the tank is lower than the set range. Liquid argon in the storage tank flows into the ambient temperature booster through the lower liquid phase pipeline and vaporizes. After vaporization, the liquid argon expands rapidly in volume, becoming high-pressure argon gas, which is discharged from the ambient temperature booster. The high-pressure argon gas after vaporization flows back to the storage tank body through the top gas phase pipeline, causing the pressure inside the tank to rise back to the set value. When the pressure inside the tank reaches the set value, the regulating valve closes, and the self-pressurization control system stops working.

[0008] The argon gas pressure regulating valve group is a skid-mounted self-operated pressure regulating valve group. The argon gas pressure regulating valve group accurately adjusts the inlet pressure to the pressure of the electroslag furnace at the gas-using terminal, and transmits the pressure, temperature, and flow parameters to the multi-parameter interlocking control system in real time.

[0009] Furthermore, the liquid argon vacuum storage tank is connected to a liquid argon tanker, and the liquid argon tanker is connected to the filling port of the liquid argon vacuum storage tank via a hose. After opening the vent valve, the liquid argon tanker's drain valve is slightly opened in sequence to pre-cool the pipeline, then the liquid argon vacuum storage tank's top inlet valve is opened to spray liquid in, and finally the liquid argon vacuum storage tank's bottom inlet valve is opened to allow the liquid to flow to the ambient temperature booster.

[0010] Furthermore, the skid-mounted self-regulating pressure regulating valve assembly includes an automatic shut-off valve, a normally open stop valve, a normally closed maintenance bypass valve, a self-regulating regulating valve, a safety valve, a relief valve, and a pressure transmitter, a temperature transmitter, and a flow transmitter connected to a multi-parameter interlocking control system; the self-regulating regulating valve has an adjustment range of 0.2~1.0MPa, and the safety valve is set at 1.1~1.3 times the design pressure of the storage tank.

[0011] Furthermore, the self-pressurizing control system uses split-range pressure control: the upstream regulating valve opens to replenish gas when the pressure is low, and the downstream back pressure valve releases gas when the pressure is high, forming a closed-loop pressure stabilization range; the top of the storage tank is equipped with a self-operated pressure reducing valve for replenishing gas when the pressure is low and a self-operated back pressure valve for releasing gas when the pressure is high.

[0012] Furthermore, the ambient air vaporizer uses natural convection heat exchange of ambient air, and its installation height must be lower than the lowest liquid level of the storage tank to enhance the liquid flow dynamics by utilizing the liquid level difference.

[0013] Furthermore, the multi-parameter interlocking control system constructs a three-dimensional linkage prediction mechanism: a. The temperature transmitter monitors the outlet temperature of the ambient air vaporizer. When the temperature is lower than the critical value for vaporization effect, the automatic linkage valve of the ambient air vaporizer in use is closed, and the automatic linkage valve of the standby ambient air vaporizer is opened; b. The differential pressure level gauge monitors the liquid level of the liquid argon vacuum storage tank. When the liquid level drops to the low alarm value, the drain valve of the current storage tank is closed, and the liquid supply is switched to the standby liquid argon vacuum storage tank; c. The pressure transmitter monitors the pressure of the buffer tank and pipeline. When the pressure exceeds the set threshold, the automatic shut-off valve of the argon pressure regulating valve group is cut off, and the liquid supply is stopped.

[0014] Furthermore, the number of ambient air vaporizers is at least two, and each ambient air vaporizer is connected to a multi-parameter interlocking control system via an automatic linkage valve. The standby ambient air vaporizer is arranged in parallel with the ambient air vaporizer in use.

[0015] Furthermore, the ambient temperature booster is a passive high-efficiency micro heat exchanger with a heat exchange area of ​​0.5~1.2m².

[0016] The beneficial effects of this improved technical solution are as follows:

[0017] 1. The system is not powered by a single source, but combines two modes: gravity-driven self-drainage of the storage tank and passive vaporization pressurization via a self-boosting device. When the tank pressure is adequate but the flow rate is insufficient, gravity-driven self-drainage is relied upon; when the pressure falls below the operating threshold, the self-boosting control system is triggered to utilize ambient waste heat for vaporization pressurization. This design significantly reduces reliance on external pressurization equipment and simultaneously addresses the pain points of insufficient pressure and flow rate, achieving a transition from passive gravity and waste heat-based pressurization to active, precise pressurization.

[0018] 2. The use of skid-mounted self-regulating valve assemblies ensures that pressure fluctuations in the upstream storage tank do not directly affect the downstream electroslag furnace equipment. This modular, independent pressure balancing design improves the overall gas supply system's anti-interference capability and ease of maintenance.

[0019] 3. Passive defrosting is achieved by utilizing the residual heat from natural convection after the liquid supply is cut off. After switching, the ambient air vaporizer no longer inputs cryogenic liquid argon, but instead uses its own metal structure to exchange heat with the ambient air. This completely eliminates the energy waste and safety hazards associated with traditional processes that require manual defrosting or additional heating, achieving a cycle of defrosting upon shutdown and preheating upon standby, making it particularly suitable for industrial scenarios requiring long-term continuous operation.

[0020] 4. During filling, the top spray system is used for rapid pre-cooling, followed by bottom gravity-flow filling of the tank. Compared to a single liquid inlet method, this process significantly shortens the tank cooling and filling cycle, while avoiding gas phase impact, ensuring a safe and efficient filling process and guaranteeing rapid system recovery. Attached Figure Description

[0021] Figure 1 This is an overall system diagram of the present invention.

[0022] Figure 2 This is the overall flowchart of the present invention.

[0023] Figure 3 This is a diagram of the storage tank body and the self-pressurization control system of the present invention.

[0024] Figure 4 This is an overall piping layout diagram of the present invention.

[0025] Figure 5 This is a flowchart of the argon gas pressure regulation process of the present invention. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0027] refer to Figure 1-2 This is an automatic switching continuous gas supply system for argon, including a gas source module, which includes a liquid argon vacuum storage tank. The liquid argon vacuum storage tank is connected to an ambient temperature vaporizer, and the rear end of the ambient temperature vaporizer is connected to a gas buffer tank. The output end of the gas buffer tank is connected to an argon pressure regulating valve group. The liquid argon vacuum storage tank includes a tank body and a self-pressurization control system. The liquid argon is pressurized to 1.0 MPa by the self-pressurization control system and then enters the ambient temperature vaporizer to complete the gas-liquid conversion. The vaporized argon is depressurized to 0.65 MPa by the argon pressure regulating valve group and then supplied to the gas-using terminal electroslag.

[0028] like Figure 1 and 3 The diagram shows the tank body and its self-pressurization control flow. The tank body is equipped with liquid phase pipelines and gas phase pipelines. During the filling stage, the tank body is pre-cooled by spraying from the top inlet valve and then gravity-fed from the bottom inlet valve, with liquid entering from both top and bottom simultaneously. After pre-cooling of the tank and pipelines, it is filled with liquid. The self-pressurization control system consists of an ambient air pressure booster, a self-regulating valve, a manual shut-off valve, and a safety valve. The ambient air pressure booster is located at the bottom of the liquid argon vacuum storage tank, and a regulating valve is located next to the ambient air pressure booster. The regulating valve operates within a pressure range of 0.8~1.2 MPa. It opens when the tank pressure falls below the set range. Liquid argon from the tank flows into the ambient air pressure booster via the lower liquid phase pipeline and vaporizes. Due to rapid expansion, the vaporized argon becomes high-pressure argon gas, which is then discharged from the booster. The high-pressure argon gas flows back to the tank body via the top gas phase pipeline, raising the tank pressure to the set value. When the tank pressure reaches the set value, the regulating valve closes, and the self-pressurization control system stops operating. The self-pressurization booster is installed at the bottom of the tank.

[0029] The ambient air pressure booster is a passive, efficient, and compact miniature heat exchanger. When the pressure inside the tank falls below the set range, the regulating valve next to the booster opens. Liquid argon in the tank flows from the lower liquid phase pipeline to the booster due to gravity. Then, ambient heat (through natural air convection) causes the cryogenic liquid argon to vaporize in a controlled manner. After vaporization, the liquid argon rapidly expands in volume, becoming high-pressure argon gas, which is discharged from the booster and returns through the gas phase pipeline at the top of the tank, thus raising the pressure inside the tank to the set value. Once the pressure inside the tank reaches the set value, the regulating valve closes, and the booster system stops working. The tank is equipped with a differential pressure level gauge and pressure gauge with remote and local display capabilities, allowing direct observation of the liquid level and pressure inside the tank. Through this series of adaptive adjustment functions, the internal pressure of the tank is automatically regulated.

[0030] like Figure 1 and 4 The valve assembly and ambient temperature vaporizer valve assembly working process of the liquid argon storage tank shown are as follows: I. Filling Process: The liquid argon tanker fills the storage tank. First, connect the liquid delivery hose to the tank filling port and fully open the tank's vent valve (V10). Slightly open the tanker's drain valve, using a small amount of liquid argon for pre-cooling and purging the hose to remove impurities and air. Then, slowly open the top inlet valves (V1, V6) of the storage tank, allowing liquid nitrogen to enter in a spray state, effectively ensuring a reduction in the tank's temperature and pressure. Once the pressure stabilizes and the tank is confirmed to be sufficiently cooled, the filling speed can be accelerated. While keeping (V1, V6) open, slowly open the bottom inlet valves (V2a, V2b) of the storage tank for simultaneous top and bottom liquid intake. When the full valve (V8) is observed to start continuously spraying liquid, it indicates that the tank level has reached the allowable upper limit (usually 90%-95% of the effective volume). At this point, the inlet valves (V1, V2a) of both the tanker and the storage tank should be immediately closed. Open the residual liquid valve (V11) to purge any remaining liquid argon from the hose. Defrost the hose and, once it has regained its flexibility, safely disconnect it. The storage tank is equipped with pressure and level measuring instruments (PT, PI, LT, LI) to monitor the inflow of liquid argon into the tank.

[0031] 2. Liquid Discharge and Consumption Process: Open the drain valves (V3a, V3b). The liquid inside the tank will be discharged into the pipeline system by its own weight. A shut-off valve is installed on the consumption pipeline, which can be interlocked with a multi-parameter interlocking control system. Based on the instruments on the storage tank, the multi-parameter interlocking control system can automatically adjust the opening of the shut-off valve, allowing the storage tank to discharge and consume liquid. Based on the liquid level signal from the instruments, if the liquid level in the storage tank reaches the low alarm position, an early warning will be issued and the shut-off valve will be automatically closed, simultaneously notifying the tank to be refilled.

[0032] 3. Automatic Stabilization of Tank Pressure: Since the discharge of liquid from the storage tank relies on the liquid's own weight and the pressure difference within the tank, it's necessary to maintain the tank within a certain pressure range. Therefore, a self-pressurizing control system is required to regulate the tank pressure. When the tank pressure falls below the set range, the regulating valve (V5) next to the ambient air pressure booster will open. Liquid argon in the tank, due to its own gravity, flows from the lower liquid phase pipeline (V2a, V4) to the ambient air pressure booster. After vaporization, the liquid argon returns to the tank via the regulating valve (V5) and the gas phase valve (V6), thus raising the tank pressure to the set value. Once the tank pressure reaches the set value, the regulating valve (V5) will close, and the booster system will stop operating. Through this series of adaptive adjustment functions, the automatic regulation of the tank's internal pressure is achieved.

[0033] like Figure 1 and 4 As shown, an automatic interlock valve is installed between the ambient air vaporizer and the liquid argon vacuum storage tank. A temperature transmitter is installed at the outlet of the ambient air vaporizer. The automatic interlock valve controls multiple ambient air vaporizers. In the figure, valves V013, V022, and V023 are normally open shut-off valves; V014 and V021 are vent valves; PSV015 and PSV020 are pipeline safety valves; EV016 is an automatic shut-off valve; Q1001A is the ambient air vaporizer; Ti101 is a temperature measuring instrument; and Pi101 is a pressure measuring instrument. Liquid argon enters the system from the storage tank via the liquid supply pipeline. The automatic shut-off valve (EV016) can be opened by the multi-parameter interlock control system. After being vaporized by the ambient air vaporizer (Q1001A), the liquid argon becomes argon gas and enters the buffer tank. When the temperature measuring instrument (Ti101) detects a low gas temperature, it can provide feedback to the multi-parameter interlocking control system, which will then automatically close the automatic shut-off valve (EV016) and simultaneously open the automatic shut-off valve of another backup liquid vaporization system. When the pressure measuring instrument (Pi101) on the buffer tank detects that the pressure inside the tank exceeds the high-level value, it can provide feedback to the multi-parameter interlocking control system, which will then automatically close the automatic shut-off valve (EV016), stopping liquid argon vaporization and gas intake into the buffer tank.

[0034] like Figure 1 , 4 and Figure 5As shown, the argon gas pressure regulating valve assembly is a skid-mounted self-operated type. Valve EV026 is an automatic shut-off valve, V027 and V028 are normally open shut-off valves, V029 is a normally closed maintenance bypass shut-off valve, Ti102 is a temperature measuring instrument, Pi103 is a pressure measuring instrument, and Fi101 is a flow measuring instrument. The pressure regulating device includes a normally open shut-off valve, a normally closed maintenance bypass shut-off valve, a self-operated regulating valve, a relief valve, a safety valve, and pressure gauges. The pressure regulating device mainly adjusts the inlet pressure to the required gas pressure through the self-operated regulating valve. Simultaneously, the pressure regulating device has corresponding pressure gauges to monitor the adjusted pressure value, and a safety valve ensures that the pressure value on the pipeline does not exceed the design pressure of the pipeline system. The pressure measuring instrument Pi103, temperature measuring instrument Ti102, and flow measuring instrument Fi101 at the downstream end can promptly feed back the system's pressure, temperature, and flow values ​​to the multi-parameter interlocking control system, which can correspondingly control the upstream automatic shut-off valve.

[0035] The functions of each component in this system are described below:

[0036] Liquid argon vacuum tank: Ensures reliable liquid argon supply, with multiple backup units; liquid argon vaporization ratio is approximately 1:785. The liquid argon storage tank should include the tank body, self-inflating device, base and anchor bolts, safety accessories, tank body piping and connectors, quick couplings, anti-breakage valves, metal hoses, level gauges, pressure gauges, etc.

[0037] Liquid can be fed into the storage tank via top or bottom filling. The tank is equipped with a differential pressure level gauge and pressure gauge for both remote and local display, allowing direct observation of the liquid level and pressure within the tank. The liquid argon vacuum storage tank is equipped with a low-level alarm. When the liquid level is low, the liquid supply valve of another vacuum storage tank automatically opens to supply liquid. Once the valve of the other vacuum tank is fully open, the supply valve of the low-level vacuum tank slowly closes. The gas supply company then transports liquid argon to the newly built liquid argon vaporization station via cryogenic liquid argon tank trucks, and delivers the liquid argon into the liquid argon vacuum storage tank using its own unloading pump. After unloading and reaching the rated liquid level, the liquid argon in the storage tank is pressurized to 1.0 MPa. Under operating conditions, the liquid argon in the storage tank, pressurized to 1.0 MPa, enters the ambient air vaporizer for vaporization. The argon gas exiting the ambient air vaporizer is depressurized to 0.65 MPa by a pressure reducing valve assembly.

[0038] Ambient air vaporizers: Two 2000 Nm³ / h ambient air vaporizers are installed. These two vaporizers are switched at fixed intervals or based on the degree of icing on their surfaces to ensure normal gas demand. A temperature transmitter at the vaporizer outlet is linked to the automatic valve at the vaporizer inlet. When the outlet temperature falls below the set value, the other vaporizer is automatically switched to. The vaporizers can also automatically switch between each other at timed intervals (adjustable time). Each vaporizer outlet must be equipped with a necessary safety valve assembly to ensure the reliability and safety of the vaporization system.

[0039] Gas buffer tank: Includes tank body, manhole, pressure gauge, safety valve, drain valve, mating flanges, gaskets and fasteners for the inlet and outlet, and all other accessories related to the tank body. The buffer tank is a 25m³ stainless steel gas storage tank with a capacity of approximately 87.5 Nm³. In the event of an accident at the liquid argon station, the electroslag furnace user can adjust the production rate in real time based on this capacity.

[0040] Argon pressure regulating valve group: The pressure regulating valve group adopts a skid-mounted self-operated type, with 2 sets, one for use, one for standby, and one for bypass. The pressure before regulation is ~1.0MPa, and the output pressure is ~0.65MPa (adjustable). The regulating gas volume is not less than 1500Nm³ / h, and the minimum volume can cover the minimum volume range used by electroslag.

[0041] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of the present invention, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. An argon gas automatic switching continuous uninterrupted gas supply system, comprising a gas source module, the gas source module including a liquid argon vacuum storage tank and a multi-parameter interlocking control system; characterized in that: The liquid argon vacuum storage tank is connected to an ambient air vaporizer, and the rear end of the ambient air vaporizer is connected to a gas buffer tank. The output end of the gas buffer tank is connected to an argon pressure regulating valve group. The liquid argon vacuum storage tank includes a storage tank body and a self-pressurization control system. The liquid argon is pressurized to 1.0 MPa by the self-pressurization control system and then enters the ambient air vaporizer to complete the gas-liquid conversion. The vaporized argon is depressurized to 0.65 MPa by the argon pressure regulating valve group and then supplied to the gas-consuming terminal electroslag furnace. The storage tank body is equipped with liquid phase pipelines and gas phase pipelines. During the filling stage of the storage tank body, liquid is introduced in a top-bottom parallel manner by spraying pre-cooling through the top liquid inlet valve and gravity flow through the bottom liquid inlet valve. After the storage tank and pipelines are pre-cooled, full liquid filling is carried out. The self-pressurization control system consists of an ambient temperature booster, a self-regulating valve, a manual shut-off valve, and a safety valve. The ambient temperature booster is located at the bottom of the liquid argon vacuum storage tank. A regulating valve is installed next to the ambient temperature booster, with a pressure range of 0.8~1.2MPa. The regulating valve opens when the pressure inside the tank is lower than the set range. Liquid argon in the storage tank flows into the ambient temperature booster through the lower liquid phase pipeline and vaporizes. After vaporization, the liquid argon expands rapidly in volume, becoming high-pressure argon gas, which is discharged from the ambient temperature booster. The high-pressure argon gas after vaporization flows back to the storage tank body through the top gas phase pipeline, causing the pressure inside the tank to rise back to the set value. When the pressure inside the tank reaches the set value, the regulating valve closes, and the self-pressurization control system stops working. The argon gas pressure regulating valve group is a skid-mounted self-operated pressure regulating valve group. The argon gas pressure regulating valve group accurately adjusts the inlet pressure to the pressure of the electroslag furnace at the gas-using terminal, and transmits the pressure, temperature, and flow parameters to the multi-parameter interlocking control system in real time.

2. The argon gas automatic switching continuous uninterrupted gas supply system according to claim 1, characterized in that: The liquid argon vacuum storage tank is connected to the liquid argon tank truck. The liquid argon tank truck is connected to the filling port of the liquid argon vacuum storage tank via a hose. After opening the vent valve, the liquid argon tank truck's drain valve is opened slightly to pre-cool the pipeline. Then, the liquid inlet valve at the top of the liquid argon vacuum storage tank is opened to spray liquid inlet. Finally, the liquid inlet valve at the bottom of the liquid argon vacuum storage tank is opened to allow liquid to flow to the ambient temperature booster.

3. The argon gas automatic switching continuous uninterrupted gas supply system according to claim 1, characterized in that: The skid-mounted self-operated pressure regulating valve assembly includes an automatic shut-off valve, a normally open stop valve, a normally closed maintenance bypass valve, a self-operated regulating valve, a safety valve, a relief valve, and a pressure transmitter, a temperature transmitter, and a flow transmitter connected to a multi-parameter interlocking control system; the self-operated regulating valve has an adjustment range of 0.2~1.0MPa, and the safety valve is set at 1.1~1.3 times the design pressure of the storage tank.

4. The argon gas automatic switching continuous gas supply system according to claim 1, characterized in that: The self-pressurizing control system uses split-range pressure control: the upstream regulating valve opens to replenish gas when the pressure is low, and the downstream back pressure valve releases gas when the pressure is high, forming a closed-loop pressure stabilization range; the top of the storage tank is equipped with a self-operated pressure reducing valve for underpressure gas replenishment and a self-operated back pressure valve for overpressure release.

5. The argon gas automatic switching continuous uninterrupted gas supply system according to claim 1, characterized in that: The ambient air vaporizer uses natural convection heat exchange of ambient air and its installation height must be lower than the lowest liquid level of the storage tank to enhance the liquid flow dynamics by utilizing the liquid level difference.

6. The argon gas automatic switching continuous uninterrupted gas supply system according to claim 1, characterized in that: The multi-parameter interlocking control system constructs a three-dimensional linkage prediction mechanism: a. The temperature transmitter monitors the outlet temperature of the ambient air vaporizer. When the temperature is lower than the critical value for vaporization effect, the interlock closes the automatic linkage valve of the ambient air vaporizer in use and opens the automatic linkage valve of the standby ambient air vaporizer; b. The differential pressure level gauge monitors the liquid level of the liquid argon vacuum storage tank. When the liquid level drops to the low alarm value, the interlock closes the drain valve of the current storage tank and switches to the standby liquid argon vacuum storage tank for liquid supply; c. The pressure transmitter monitors the pressure of the buffer tank and pipeline. When the pressure exceeds the set threshold, the interlock cuts off the automatic shut-off valve of the argon pressure regulating valve group and stops the liquid supply.

7. The argon gas automatic switching continuous uninterrupted gas supply system according to claim 1, characterized in that: The ambient air-temperature booster is a passive, high-efficiency micro heat exchanger with a heat exchange area of ​​0.5~1.2m². The number of ambient air-temperature vaporizers is at least two, and each ambient air-temperature vaporizer is connected to a multi-parameter interlocking control system via an automatic linkage valve. The standby ambient air-temperature vaporizer is arranged in parallel with the active ambient air-temperature vaporizer.

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