62 results about "Liquid argon" patented technology

The invention discloses a liquid air energy storage system based on air separation, which is characterized by comprising an air purification unit, an energy storage unit, an air rectification unit and an LNG (Liquefied Natural Gas) cold supply unit, wherein the air purification unit comprises an air filter, an air compressor, a first cooler, an adsorber and a first heater, and the energy storage unit comprises a first liquid separation tank, a liquid air storage tank, a liquid air pump and an air expansion machine. The air rectification unit comprises a rectification tower, a main cold box, a second liquid separation tank, a second subcooler, a first heat exchanger, a liquid nitrogen storage tank, a liquid oxygen storage tank, a second heat exchanger, an argon rectification system and a liquid argon storage tank; and the LNG cold supply unit comprises a first nitrogen supercharger, a second nitrogen supercharger, an LNG cold box and a first subcooler. The system has the functions of air separation and electric energy storage at the same time, and cold energy of the LNG receiving station is fully utilized for air separation and energy storage to participate in construction of a novel power system of a power grid.

The invention provides a neodymium iron boron melt-spinning cooling device based on a double-sided forced cooling device and a refining method. The neodymium iron boron melt-spinning cooling device comprises a copper wheel cooling unit, a liquid argon forced cooling unit, a drum-type cooler and a crusher. Carrying out melt-spinning forming on the neodymium-iron-boron melt through a high-speed rotating copper wheel, and realizing primary cooling through a sticking roller surface; a liquid argon nozzle array is arranged above the free surface of the melt-spinning sheet, liquid argon is sprayed at an angle of 30-60 degrees, and secondary forced cooling is formed; and then entering a drum-type cooler for heat conduction cooling, and finally treating by a crusher. According to the device, a double-face cooling system of the roller pasting face and the free face is constructed, the cooling efficiency is effectively improved, the grain size is refined, the heavy rare earth adding amount is reduced, and the device is suitable for preparing the high-performance neodymium-iron-boron magnet.

The application discloses a detector container and relates to the technical field of detectors; the detector container comprises an inner container and an outer container, the inner container is fixedly suspended in the outer container, liquid argon inlet pipes and argon gas outlet pipes are connected to the inner container, and the liquid argon inlet pipes and the argon gas outlet pipes are connected with an argon liquefied cold box at the ends; a vacuum outlet of the outer container and a vacuum outlet of the inner container are arranged at the top of the outer container, one end of the vacuum outlet of the outer container and the vacuum outlet of the inner container is connected with a vacuum pumping system through a vacuum pipeline, the other end of the vacuum outlet of the outer container is communicated with the space between the outer container and the inner container, and the other end of the vacuum outlet of the inner container is communicated with the inner part of the inner container; and a detector communicated with the inner container is arranged at the top of the outer container. The detector container has the advantages that the refrigeration time is long, and the refrigeration effect is good.

The invention relates to the technical field of detection, in particular to an inner wall state detection device for a liquid hydrogen transportation tank, which comprises a miniature liquid hydrogen transportation outer tank, a miniature liquid hydrogen transportation inner tank is welded and fixed at the upper end of the inner wall of the miniature liquid hydrogen transportation outer tank, and the upper end of the miniature liquid hydrogen transportation inner tank penetrates through the top of the miniature liquid hydrogen transportation outer tank and is in threaded connection with a screw cover; according to the device, by means of the characteristic that liquid argon can be gasified when making contact with normal-temperature air, when the micro liquid hydrogen transportation outer tank is broken, the trigger mechanism is started, and the micro liquid hydrogen transportation inner tank is in a vacuum state; the liquid argon is gasified and mixed with the fluorescent dry powder, the colored gas generated by gasification is sprayed out from the damaged position to form a striking visual mark, a worker can visually find the damaged position at the first time without the aid of a complex detection instrument or large-area troubleshooting, and the fault diagnosis time is greatly shortened.

This invention discloses a novel liquid argon filling pump sealing gas system, belonging to the field of metallurgical air separation oxygen production technology. It includes a liquid argon storage tank, a booster, and a liquid argon filling pump. A liquid phase outlet at the lower end of the liquid argon storage tank is connected to the liquid argon filling pump via a first pipe to fill the pump with liquid argon. Another liquid phase outlet at the lower end of the liquid argon storage tank is connected to the booster via a second pipe. A gas phase outlet at the upper end of the liquid argon storage tank is connected to the booster via a third pipe. The booster is connected to the sealing gas interface of the liquid argon filling pump via an instrument pipe to supply a sealing gas source. The instrument pipe is connected to the second pipe via a tee. The gas phase outlet of the liquid argon storage tank forms a vent outlet at the top of the liquid argon storage tank via a tee on the third pipe. Gaseous argon from the upper end of the liquid argon storage tank enters the booster, is reheated to room temperature by the booster, and then enters the sealing gas interface of the liquid argon filling pump via the instrument pipe as a sealing gas. This system ensures the purity of the liquid argon product, promotes resource reuse, and effectively reduces costs.

The utility model belongs to the technical field of equipment safety, and particularly relates to a liquid argon storage tank with an anti-collision function, which comprises a storage tank shell, a protective component is fixedly connected to the outer wall of the storage tank shell close to the upper end, the protective component comprises a plurality of fixing blocks, buffer components are fixedly connected to two sides of each fixing block, and each buffer component comprises a connecting block. A buffer cavity is formed in the connecting block, a moving groove is formed in the outer side of the buffer cavity, a rotating rod is slidably connected into the moving groove, one end of the rotating rod is rotatably connected with a rotating shaft, and the other end of the rotating shaft is fixedly connected with a buffer plate. According to the liquid argon storage tank with the anti-collision function, a buffer plate receives pressure at the first time, shrinks inwards and drives a sliding plate located in a buffer cavity to downwards press a first elastic piece, and the elasticity of the first elastic piece is utilized, so that impact generated by collision is reduced; and a sliding ring is pressed through a sliding hole by utilizing a pushing column at the bottom of a sliding plate, so that the impact on the storage tank shell is dispersed, and the storage tank shell is protected.

The utility model discloses a safety interlocking device for vaporization of low-temperature liquid oxygen, liquid nitrogen and liquid argon, and relates to the technical field of vaporization equipment. The device comprises a vaporizing tank, a DCS (Distributed Control System), a buffer pressure tank and an exhaust pipeline, wherein a material coil pipe and a steam coil pipe are arranged in the vaporizing tank; a water bath layer is arranged in the vaporizing tank; a steam inlet pipe connected with the steam coil pipe is arranged at the top of the vaporizing tank, a steam regulating valve is arranged on the steam inlet pipe, and a material inlet pipe connected with the material coil pipe is arranged at the bottom of the vaporizing tank. According to the utility model, through the design of the DCS control system, the steam regulating valve, the liquid pump, the liquid level sensor, the in-tank temperature sensor and the pipe body temperature sensor are connected with the DCS control system, when the temperature sensors detect temperature deviation, timely and safe interlocking control can be realized; safety accidents caused by pipeline leakage in the vaporization tank can be monitored, and the safety of vaporization equipment is greatly improved.

The utility model relates to low temperature gas cylinder filling technical field, concretely relates to a kind of argon and carbon dioxide mixed gas filling equipment including base, the upper surface of the base is fixedly connected with two symmetrical support frames, the inner wall of two The support frame is respectively provided with liquid argon storage tank and low-temperature liquid carbon dioxide storage tank, the outer wall between two The support frame is fixedly connected with support plate, the inner wall of the support plate is fixedly connected with mixing box, the inner wall of the liquid argon storage tank is fixedly connected with argon filling pipeline. The utility model is provided with filling busbar, can be connected with multiple gas steel cylinders simultaneously, realize the filling of multiple gas steel cylinders simultaneously, accurately control the filling amount of two kinds of gas, to ensure that argon and carbon dioxide are mixed according to specific ratio, while impeller can fully stir and mix argon and carbon dioxide entering mixing box, ensure that mixed gas composition is uniform, improve the use effect of the filling equipment.

The utility model relates to the technical field of liquid argon purification rotating shafts, in particular to a high-purity liquid argon purification device. According to the technical scheme, the device comprises a fixed box, a top plate, an upper box body, a lower box body, a middle plate and a bottom plate, the upper box body is installed at the upper end of the fixed box, the lower box body is installed at the lower end of the fixed box, the middle plate is arranged in the fixed box, and a filter screen, porous ceramics, a first grid plate, a second grid plate and a third grid plate are installed in the middle plate in a penetrating mode; a top plate and a bottom plate are arranged at the two ends of the filter screen, the porous ceramic, the first grid plate, the second grid plate and the third grid plate, a first treatment chamber is arranged between the top plate and the middle plate, a second treatment chamber is arranged between the middle plate and the bottom plate, an upper butt joint frame is arranged in the upper box body, and a lower butt joint frame is arranged in the lower box body. The longitudinal position can be quickly adjusted through the treatment chamber I and the treatment chamber II, so that the problems of long downtime of equipment and tedious and time-consuming disassembly and assembly of the equipment during cleaning of an argon filtering assembly and an adsorption assembly are solved.

This invention discloses an automatic start-up and load-variable control method for an air separation argon purification system. Automatic start-up, load-variable operation, and steady-state adjustment of the argon purification system no longer require operator intervention; operators only need to change the system's load flow rate setpoint. During automatic start-up, load-variable operation, and steady-state adjustment, the system operates stably, and the nitrogen content of the liquid argon in the product meets requirements. This completely solves the problems of easy overpressure in the argon purification tower and the necessity of discharging substandard liquid argon during the initial automatic operation of the argon purification system, eliminating safety hazards and saving energy consumption. When the argon purification system is operated at reduced load, the minimum load can reach 20% of the normal load, and the operating conditions remain stable, while the product quality still meets requirements. This solves the problem of frequent start-up and shutdown of the argon purification system when user usage fluctuates significantly.

The invention provides a high-purity liquid argon purification method and a purification device thereof, and relates to the field of liquid argon purification, the high-purity liquid argon purification method and the purification device thereof are characterized in that a raw material liquid argon supply unit can provide crude liquid argon with the oxygen content of 1-5 ppm, and then the crude liquid argon is gasified through a heat exchange cold box; the method comprises the following steps: blowing hydrogen into a high-purity liquid argon storage tank, pressurizing gasified argon to 0.5-1.0 MPa through an oil-free compressor, reacting the blown hydrogen with oxygen through a catalytic deoxidation unit to produce water molecules, absorbing the water molecules and the oxygen through an adsorption purification unit, liquefying the purified argon through a liquefaction reflux unit, and storing the liquefied argon in the high-purity liquid argon storage tank. According to the invention, the crude liquid argon can be rapidly and stably purified, hydrogenation catalytic deoxidization and adsorption purification are taken as a core, efficient purification is realized through gradient utilization of cooling capacity and intelligent control, and the purification cost can be effectively reduced.

This invention relates to a cold box for argon recovery device with complete argon-hydrogen recovery and its usage method. It includes a cold box containing an argon purification tower, a waste gas distillation tower, a nitrogen production distillation tower, a main heat exchanger, an expander, and a nitrogen production condenser / evaporator, all connected by pipelines. Two main heat exchangers are installed: a first main heat exchanger and a second main heat exchanger. Two expanders are also installed: a first expander and a second expander. One expander is in use while the other is on standby, and they are switched between each other. The waste gas distillation tower is used for cold box capacity balancing, transferring excess cold energy from the nitrogen production system to the argon separation system. The application of this cold box not only maintains a near 100% argon recovery rate and minimizes liquid argon backflow, but also recovers and reuses hydrogen from the waste gas, thereby reducing equipment investment and operating power consumption. It has significant practical value and economic benefits.

The utility model provides a laboratory argon pipeline conveying system which comprises a liquid argon storage system, a liquid argon vaporization system and an argon using system, the liquid argon storage system is provided with a low-temperature liquid argon storage tank, the low-temperature liquid argon storage tank is connected with the liquid argon vaporization system through a pipeline, the liquid argon vaporization system is provided with a water bath vaporizer, and the liquid argon vaporizer is connected with the argon using system through a pipeline. The rear end of the vaporizer is connected with an argon buffer tank; and the argon buffer tank is connected with an argon using system through a pipeline. According to the utility model, argon is conveyed by the pipeline instead of being supplied by a traditional argon bottle, so that the operation risk of frequently replacing the argon bottle is avoided, the safety risk of using the argon is reduced, and the labor efficiency of detection and test personnel is improved.

The invention relates to a method for the cryogenic separation of air using an air separation plant (100-300) having a main heat exchanger (4) and a subcooled countercurrent (18), and a rectification column system (10) comprising a high-pressure column (11), a low-pressure column (12) and an argon system (400). The argon system (400) comprises a crude argon column (13a, 13b) operating at a pressure higher than 1.8 bar. At least one liquid flow (e, n1) from the high-pressure column (11) is cooled relative to at least one gas flow (n2) from the low-pressure column (12) in a subcooling countercurrent (18). The liquid argon product (v) from the argon system (400) is introduced into the subcooled countercurrent (18) and cooled there before being released as a final product. The invention also relates to a corresponding air separation device.

The present application discloses a liquid argon cold recovery nitrogen production equipment and its working method. The liquid argon cold recovery nitrogen production equipment includes a liquid argon cold recovery nitrogen production device, the liquid argon cold recovery nitrogen production device is arranged in a cold box, the liquid argon cold recovery nitrogen production device includes a temperature control component, a production mechanism and a liquid argon cold recovery group, the temperature control component includes a heat exchanger, the heat exchanger has a raw material pipe, the production mechanism includes a distillation nitrogen tower, and the liquid argon cold recovery group includes a liquid argon evaporator and a first nitrogen reboiler. The present application recovers the cold of liquid argon for nitrogen production, that is, during operation, not only is liquid argon converted into argon gas to meet usage needs, but liquid argon is also used as a cold source for nitrogen heat exchange, wherein the liquid nitrogen is refluxed to the distillation nitrogen tower, so that the cold of liquid argon is indirectly utilized in the distillation operation. Compared with the existing technology, it effectively avoids the waste of liquid argon cold and greatly reduces the cost of nitrogen preparation.

The invention discloses a recycling and reusing method for backup liquid emptying argon, and relates to the technical field of argon recycling, an argon recycling assembly, a liquid argon storage tank assembly and a double-membrane gas holder are included, and the method comprises the steps that the pressure of a storage tank is monitored in real time, and when the pressure reaches the upper limit, emptying gas enters an emptying pipeline; the emptying gas is introduced into the heat exchanger through the recovery pipeline, and the raw material gas enters the double-membrane gas holder through the gas inlet pipeline; raw material gas passes through a compressor and then is conveyed to a heat exchanger to exchange heat with emptying gas, so that the emptying gas is reheated, and the raw material gas is pre-cooled and enters a cold box with cooling capacity; mixing the gas subjected to heat exchange with feed gas, performing compression, decarburization and the like, and purifying in a cold box; and the purified argon is reheated to the use temperature through the heat exchanger, and is conveyed to a single crystal workshop together with normal argon. According to the method, argon emission can be reduced, the resource recycling rate and the cooling capacity utilization rate can be increased, then resource loss is reduced, the potential safety hazard probability can be reduced, and the working efficiency can be improved.

The application provides an argon recovery energy efficiency control method and intelligent system for a titanium powder manufacturing process, and relates to the technical fields of metal powder metallurgy preparation and industrial gas recovery energy efficiency control, wherein the method comprises the following steps: controlling liquid argon gasification, mixing the recovered gas, processing through a medium-pressure machine, a purifier and a high-pressure machine, and sending to a gas atomization device; extracting tail gas for recovery by a fan; and dispatching a water cooling system to absorb waste heat of the unit and send the waste heat to a gasification module and a purifier for reuse. The control method extracts a pressure drop slope in real time, calculates a fluid transmission lag time window faced by waste heat delivery when the pressure drop slope exceeds a limit, controls the medium-pressure machine to generate transient compensation heat energy by using internal airflow rotation within the time window, urgently directs the waste heat intended for the purifier to the gasification module to make up for a sudden increase in cold load, and transfers the compensation heat energy to the purifier to maintain a temperature threshold. The control method effectively eliminates the global thermal imbalance phenomenon caused by the heat transmission delay of the pipe network.

The invention relates to an automatic air supply system for a hot isostatic pressing air source. A one-key starting instruction module, a liquid argon leading-out control module, a low-temperature liquid pump starting module, a vaporizer vaporization control module, a pressure monitoring and valve group switching module, a pressurization mode adaptation module, a continuous gas production guarantee module, a storage tank group management module, a hot isostatic pressing machine PLC control module and a safety protection module are arranged in the gas source PLC control cabinet; through cooperative work of all the modules, full-process automatic control of liquid argon exporting, pre-cooling, vaporization, storage in the storage tank, equipment gas supply and mode switching is achieved, manual intervention is not needed, the technical defects of an existing gas supply mode are effectively overcome, and the gas supply efficiency, stability, safety and reliability of the hot isostatic pressure gas source are improved.

The utility model relates to a small air separation liquid argon rectification device which comprises a main rectification tower, the main rectification tower comprises an upper tower, a main condensation evaporator and a lower tower, a rectification raw material conveying pipe is arranged on the upper tower, a first rectification tower is arranged at the outlet end of the rectification raw material conveying pipe, and first return pipes are arranged on the first rectification tower and the upper tower. A first filler layer, a second return pipe and a middle gas conveying pipe are arranged in the first rectifying tower, a second rectifying tower is arranged on the second return pipe and the middle gas conveying pipe, a second filler layer, a liquid argon collecting barrel and a third filler layer are arranged in the second rectifying tower, and a liquid argon extraction pipe is arranged at the bottom end of the liquid argon collecting barrel; a first connecting pipe is arranged on the liquid argon extraction pipe, a second connecting pipe is arranged on the second rectifying tower above the liquid argon collection cylinder, and first liquid level sensors are arranged on the second connecting pipe and the first connecting pipe. And the liquid argon product can be extracted from the small-flow liquid argon reflux liquid. The utility model has the advantages of convenient use and wide market prospect.

The invention discloses liquid argon cold energy recovery nitrogen-making equipment and a working method thereof.The liquid argon cold energy recovery nitrogen-making equipment comprises a liquid argon cold energy recovery nitrogen-making device, the liquid argon cold energy recovery nitrogen-making device is arranged in a cold box, and the liquid argon cold energy recovery nitrogen-making device comprises a temperature adjusting assembly, a making mechanism and a liquid argon cold energy recovery set; the temperature adjusting assembly comprises a heat exchanger, the heat exchanger is provided with a raw material pipe, the preparation mechanism comprises a rectification nitrogen tower, and the liquid argon cold energy recovery set comprises a liquid argon evaporator and a first nitrogen reboiler. The cold energy of the liquid argon is recycled to be used for making nitrogen, that is, in the operation process, the liquid argon is converted into argon to meet the use requirement, the liquid argon serves as a cold source of liquid nitrogen obtained through heat exchange of the nitrogen, the liquid nitrogen flows back to the rectifying nitrogen tower, and therefore the cold energy of the liquid argon is indirectly used for rectifying operation. And the situation that the liquid argon cooling capacity is wasted is effectively avoided, and the nitrogen preparation cost is greatly reduced.

The invention belongs to the field of low-temperature engineering, and discloses a low-temperature liquid supply system using a cavitation pipe assembly. The low-temperature liquid supply system controls flowing of low-temperature liquid through a centrifugal pump, a pipeline, a regulating valve and a cavitation pipe, one path enters the liquid nitrogen injection bent frame through a main path regulating valve assembly to be used by a user, and the other path returns to the liquid storage tank through a backflow regulating valve or controls fluid pressure through a gas-liquid separation tank. And the pressure fluctuation of a fluid working system caused by large-range pressure difference change is overcome by using the cavitation pipe assembly. According to the low-temperature liquid supply system using the cavitation pipe assembly, the maximum supply flow can reach 315 kg / s, the fluid pressure range is 0.3 MPa-1. 15 MPa, the pressure control precision is better than 0.5%, the low-temperature liquid supply system can be used for low-temperature liquid flowing and heat transfer characteristic research, the low-temperature liquid conveying requirement for large-flow and high-precision control is met, and the low-temperature liquid supply system is suitable for large-flow and high-precision control. And the use requirements of a large low-temperature device on low-temperature liquid such as liquid oxygen, liquid nitrogen, liquid argon and liquid helium are met.

The smelting device comprises a smelting furnace and a liquid argon tank, supporting columns are fixedly installed at the four corners of the bottom end of the smelting furnace, a controller is installed at the bottom of the left side of the smelting furnace, the liquid argon tank is installed behind the smelting furnace, a pressure reducing valve is installed at an output port of the liquid argon tank, and the pressure reducing valve is connected with the controller. The output end of the vaporizer is connected with an air pipe which is communicated with the interior of the smelting furnace. By arranging the pressure reducing valve, the vaporizer and the gas pipe, high-pressure liquid argon in the liquid argon tank can be stably vaporized into normal-temperature gaseous argon, and the normal-temperature gaseous argon is guided into the smelting furnace at a controllable flow, so that compared with the traditional smelting in an air environment which is easy to cause oxidation of aluminum, nickel and cobalt elements, the device disclosed by the utility model has the advantages that the alloy oxidation loss is reduced, and the production cost is reduced. And the component control precision and purity are improved, and the columnar crystal aluminum-nickel-cobalt permanent magnet alloy with high density, high uniformity and stable magnetic performance can be obtained.

The application discloses a device and method for preparing supercooled liquid argon, and the device is a device for preparing supercooled liquid argon, which can prepare supercooled low-temperature liquid argon and keep supercooling degree, and specifically comprises a hydrogen medium sandwich container and a gas pressure control chamber. The hydrogen medium sandwich container is connected with the gas pressure control chamber through a capillary. The gas pressure control chamber contains hydrogen temperature swing adsorption material (MOFs) and a semiconductor temperature control element, the temperature of the MOFs can be adjusted through the semiconductor temperature control element, the adsorption amount of hydrogen of the MOFs is changed, the gas pressure of the sandwich layer is changed, and the cooling rate is controlled.

A cold box of an argon recovery apparatus for full recovery of argon and hydrogen, and a use method therefor. The cold box (C501) is internally provided with an argon purification column (C21), a waste gas distillation column (C23), a nitrogen production rectification column (C22), main heat exchangers, expanders, and a nitrogen production condensing evaporator (K23), which are connected to each other by means of pipes. Two main heat exchangers are provided, which are a first main heat exchanger (E21) and a second main heat exchanger (E22) respectively. Also, two expanders are provided, which are a first expander (ET501) and a second expander (ET502) respectively, and when in use, one is being used and the other is on standby, with the two being switched for use. The waste gas distillation column (C23) is used for cold capacity balancing of the cold box (C501), and transfers excess cold capacity of the nitrogen production system to an argon separation system. The use of the cold box (C501) allows the argon recovery rate to be maintained close to 100%, achieving a small liquid argon re-injection amount, while also recovering and utilizing hydrogen in the waste gas.

The present invention relates to a rapid conversion device for producing high-purity argon and pure argon, comprising a system control device, an air filter, an air compressor, an air precooling system, a molecular sieve purifier, an air pretreatment device, a heat exchanger, a full distillation air separation system, a crude distillation tower, a distillation tower, a high-purity argon tank, a vehicle charging pump, a first weight sensor, a first pure argon tank, a first medium-pressure argon pump, a second pure argon tank, a second medium-pressure argon pump, a second weight sensor, an intelligent controller, a detector, and a display. The rapid conversion device and conversion method for producing high-purity argon and pure argon fully utilize the production and storage capacity of the system equipment. When pure argon production is needed, the production of liquid argon is increased and the produced pure argon is stored in the first and second pure argon tanks of 10 cubic meters for supply to pure argon users. When high-purity argon production is needed, the production of liquid argon is reduced to the design value. After analysis, when the liquid argon product meets the high-purity argon standard, it is stored in the 20 cubic meter high-purity argon tank.

The invention relates to the technical field of liquid argon preparation, and discloses a system and method for reducing pollution of a high-purity argon product and an air separation system. The system comprises an argon storage tank, a supercharging device, a first detection device and a controller. Wherein the argon storage tank is used for storing liquid argon, and a gas exhaust port is formed in the top of the argon storage tank; the supercharging device is connected with the argon storage tank; the first detection device is connected with the argon storage tank through a sampling pipeline and is used for detecting the content of nitrogen in the argon storage tank, and the controller is connected with the supercharging device and is used for controlling the load of the supercharging device. According to the technical scheme, negative pressure formed in the argon storage tank can be prevented from sucking air to cause pollution to the liquid argon product, the nitrogen content in the liquid argon product is reduced, and therefore pollution to the high-purity argon product is reduced.

The utility model discloses a liquid argon storage device, which comprises a base, a shock absorber, a shock absorption seat and a rotating disc, self-locking universal wheels are arranged at the bottom of the base, the shock absorber is arranged on the base, the shock absorption seat is arranged on the shock absorber, a rotating seat is arranged in the middle of the shock absorption seat, the rotating disc is rotatably sleeved on the rotating seat, and the rotating disc is arranged on the rotating seat. A plurality of sets of limiting grooves used for containing Dewar tanks are formed in the rotary disc, the multiple sets of limiting grooves are distributed in an annular array mode, stand columns are arranged on the base, protective doors are arranged on the stand columns, the two sets of stand columns are symmetrically arranged, fixing shafts are arranged on one set of stand columns, magnets are arranged on the other set of stand columns, and the protective doors are arranged on the protective doors. And one side of the protective door is rotationally arranged on the fixed shaft in a sleeving manner. The utility model relates to the technical field of storage devices, and particularly provides a liquid argon storage device which is convenient for moving a plurality of groups of Dewar tanks at the same time, has a damping function and is convenient for protecting the Dewar tanks.

The present application belongs to the technical field of nozzle oil injection hole position welding, and particularly relates to a control method for the position of an oil injection hole of a double-layer complex structure nozzle, comprising the following steps: controlling the distance between the center of an oil injection hole on an inner oil injector and the welding positioning end face of an oil collecting ring shell, adjusting the assembly gap, and ensuring that the oil injection hole is not blocked during assembly; adjusting the placement position of the parts in a vacuum brazing furnace to ensure that the oil injection hole is not blocked during vacuum brazing; judging the oil injection hole deviation direction according to the distance between the center of the inner oil injection hole and the outer oil collecting ring hole edge; determining the circumferential weld segmentation welding sequence of the argon arc welding seam according to the oil injection hole deviation direction; and placing the parts in water to carry out liquid argon arc welding. The position of the outer layer of the nozzle shell and the inner oil injector can be greatly reduced, the problem that the circumferential oil injection hole of the inner oil injector is blocked is avoided, and the purpose of controlling the position of the circumferential oil injection hole of the inner layer of the complex double-layer structure nozzle to meet the design requirements is achieved.

The utility model provides an argon recovery device which comprises a first heat exchanger and a backup liquid argon storage tank, the outlet end of the first heat exchanger is connected with a decarburization device used for decarburizing crude argon to be recovered through a pipeline, and the outlet end of the decarburization device is connected with a second heat exchanger through a pipeline. The outlet end of the second heat exchanger is connected with a dehydration device used for dehydrating crude argon to be recycled through a pipeline, the outlet end of the dehydration device is connected with a rectifying tower through a pipeline, the first heat exchanger is provided with a first refrigerant inlet and a first refrigerant outlet, and the second heat exchanger is provided with a second refrigerant inlet and a second refrigerant outlet. And the backup liquid argon storage tank is used for enabling liquid argon to sequentially flow through the first refrigerant inlet, the first refrigerant outlet, the second refrigerant inlet, the second refrigerant outlet and the pipeline at the outlet end of the rectifying tower. The argon recovery device is reasonable in structure, energy-saving and good in argon recovery effect.

The utility model provides a crude argon rectification system, which comprises a crude argon tower provided with a crude argon reaction cavity, a first material inlet, an argon outlet and a reflux inlet, the first material inlet is used for conveying materials, and the crude argon tower can separate argon components and oxygen components in the materials; the pure argon tower is provided with a pure argon reaction cavity, an argon inlet and a liquid argon outlet, the argon inlet and the liquid argon outlet are both communicated with the pure argon reaction cavity, the argon inlet is communicated with the argon outlet, the pure argon tower can separate an argon component and a nitrogen component in a material, and the argon component is discharged from the liquid argon outlet; one end of the collecting pipeline is communicated with the liquid argon outlet, the other end of the collecting pipeline is used for being communicated with a storage tank, and the storage tank is used for storing argon components discharged from the liquid argon outlet; one end of the first backflow pipeline is communicated with the collecting pipeline, and the other end of the first backflow pipeline is communicated with the backflow opening. According to the technical scheme, the problem that in the prior art, the loss rate of the argon component is high can be solved.