102 results about "Buffer gas" patented technology

A hybrid inductively coupled plasma mass spectrometer (ICP-MS) system is disclosed for simultaneous elemental and molecular analysis in positive and negative polarities. It includes an ICP torch that generates plasma with a buffer gas, producing both positively and negatively charged ions from a sample. Positioned between the sampler and skimmer, an insert with a defined geometry forms a reaction chamber. Various embodiments feature multiple apertures for pressure control, a rotatable disk for aperture regulation, a slider gate for pressure adjustment, a circular gate with adjustable radial apertures, and an inlet for introducing gases, reagents, dopants, or analytes. These components enable precise pressure modulation, optimizing performance for dual-polarity mass spectrometry. The system enhances analytical flexibility by facilitating controlled ion reactions, improving sensitivity and specificity for both elemental and molecular applications. This innovation expands ICP-MS functionality, supporting diverse scientific and industrial applications requiring high-precision mass analysis.

The invention discloses an oxygen carrier abrasion evaluation device and method. The device comprises a computer, a PLC, a weighing sensor, a differential pressure sensor, a buffer gas chamber, an infrared heating furnace, a compressed gas cylinder, a water storage bottle, a sampling pipe, a tail gas collecting pipe, a filter, a micro gas pump and a reactor. Wherein the computer, the weighing sensor, the differential pressure sensor and the infrared heating furnace are all connected with the PLC, a reactor is arranged in the infrared heating furnace, the weighing sensor is provided with the scale, the scale is provided with the buffer gas chamber, the buffer gas chamber is communicated with the reactor, and the compressed gas cylinder and the water storage cylinder are both connected with the buffer gas chamber; the micro air pump is connected with the filter which is connected with the tail gas collecting pipe. Under the conditions of a mechanical wear experiment and a thermal stress wear experiment, the wear performance of the oxygen carrier is evaluated by drawing a thermogravimetric curve and calculating the wear rate by using a thermogravimetric signal transmitted by the device, which indicates that the oxygen carrier has good chemical looping reaction wear resistance, and the method provides a scientific basis for optimizing the design and operation of a chemical looping reaction system.

The present invention improves storage efficiency by effectively using, in a simple form, the storage volume of a compressed gas storage part in which a compressed gas is stored. Provided is a compressed gas storage system (100) for storing a compressed gas which has been compressed by a compressor, said system comprising: a compressed gas storage part (300) in which a compressed gas is stored; a buffer gas storage part (310) in which a buffer gas is stored; a first cooler (306) that cools the buffer gas; a first adjustment valve (307) that is provided between the first cooler and the buffer gas storage part; a second adjustment valve (309) that is provided between a first heater and the buffer gas storage part; a second heater (312) that heats the buffer gas inside of the buffer gas storage part; and a control unit (320) that at least controls the temperatures of the first cooler, the first heater, and the second heater, and the degrees of opening of the first adjustment valve and the second adjustment valve.

The invention relates to a light-weight TPcon special solder strip annealing device which comprises a box body and a cooling water tank fixed to the surface of the box body, an upper annealing wheel, a third wheel and a driven wire passing wheel are rotationally arranged on the surface of the box body, and the driven wire passing wheel is located in an inner cavity of the cooling water tank. According to the special light-weight TPcon solder strip annealing device, a dynamic labyrinth sealing structure composed of a fluororubber sealing sleeve, an adjustable movable plate and a partition plate is arranged and combined with a gas storage tank buffer gas supply system, on the premise that a solder strip continuously penetrates through the dynamic labyrinth sealing structure, multiple zigzag gas leakage paths are formed, the gas leakage resistance is greatly increased, and the service life of the solder strip is prolonged. According to the system and the method, by matching with a micro-positive pressure environment maintained by the gas storage tank, 'on-demand supplementation 'is realized, most of nitrogen is sealed in the system for cyclic utilization, only extremely small leakage amount needs to be supplemented, and compared with a traditional continuous purging mode, more than 90% of nitrogen consumption can be saved, and the production cost is remarkably reduced.

The invention provides a low-temperature molecular beam device, which relates to the field of low-temperature physical chemistry and comprises a refrigeration assembly, a primary shielding cover and a buffer cooling structure. The refrigeration assembly comprises a first-stage cold head and a second-stage cold head; the first-stage shielding cover is provided with a first-stage shielding inner cavity; the first-stage cold head is connected with the first-stage shielding cover and is used for cooling the first-stage shielding cover; the second-stage cold head is accommodated in the first-stage shielding inner cavity; the buffer cooling structure is connected to the second-stage cold head and is accommodated in the first-stage shielding inner cavity; the buffer cooling structure is provided with a buffer cooling inner cavity, and the buffer cooling inner cavity is used for introducing buffer gas and target molecules. According to the low-temperature molecular beam device in the embodiment of the invention, the temperature of the buffer gas can be further reduced.

The utility model relates to the technical field of gas detection, in particular to a hydrogen analyzer. The analyzer comprises an analyzer body, a gas inlet formed in the top of the analyzer body, a hydrogen treatment mechanism, a buffer gas supply mechanism and a rotating shaft I, the hydrogen treatment mechanism is arranged on the outer side of the gas inlet through threads; the buffer gas supply mechanism is arranged at the top of the hydrogen treatment mechanism; the first rotating shaft is rotationally arranged on the hydrogen treatment mechanism. According to the utility model, the hydrogen treatment mechanism is arranged, the filter plate is used for blocking and cleaning particle impurities in to-be-detected gas, and the molecular sieve in the filter box and the activated carbon in the placing box are used for absorbing other gases in the to-be-detected gas, so that the impurities can be effectively removed, and the hydrogen is ensured to smoothly enter the analyzer; therefore, the measurement accuracy is improved, the phenomenon that impurities interfere with a hydrogen detection signal and cause deviation of a measurement result is avoided, the concentration of hydrogen can be improved by absorbing other gases, and the measurement accuracy is improved.

An extreme ultraviolet light generation apparatus includes a chamber in which a target substance supplied to a plasma generation region is irradiated with laser light to generate extreme ultraviolet light, a laser device generating the laser light, a target supply unit supplying a droplet of the target substance toward the plasma generation region, a target collection unit collecting the target substance which has not been irradiated with the laser light, a first gas supply unit supplying a buffer gas into the chamber, and a processor controlling the first gas supply unit so that, in a period of the droplet being output, a first flow rate of the buffer gas to be supplied from the first gas supply unit in at least a part of a first period is smaller than a second flow rate of the buffer gas to be supplied from the first gas supply unit in a second period.

The invention relates to an atomic gas chamber and a preparation method thereof. The preparation method of the atomic gas chamber comprises the following steps: providing an atomic gas chamber glass bulb; rubidium steam is filled in the atomic gas chamber glass bulb; the atomic gas chamber glass bulb is filled with mixed gas; wherein the mixed gas comprises xenon 129, xenon 131, hydrogen and a buffer gas; the voltage division ratio of the xenon 129 to the xenon 131 is (1: 4)-(1: 9); carrying out heat preservation treatment on the atomic gas chamber glass bulb, and reacting rubidium steam with hydrogen to generate a rubidium hydride film layer; and the rubidium hydride film layer covers the inner wall of the atomic gas chamber glass bulb. According to the preparation method of the atomic gas chamber, provided by the invention, the atomic spin relaxation time of xenon 129 and xenon 131 can be prolonged, the relaxation performance of two isotopes can be balanced, the performance of the atomic gas chamber is further improved, and the requirements of application scenes such as a quantum inertia instrument on the atomic spin stability of the atomic gas chamber are met.

The application provides a gas pressure regulating device, a cold gas micro-propulsion system and a satellite, and relates to the technical field of cold gas micro-propulsion. The gas pressure regulating device comprises a high-pressure valve, a two-stage pressure reducing valve, a precision pressure regulating valve, a buffer gas cylinder and a pressure sensor. One end of the high-pressure valve is connected with a high-pressure gas cylinder, and the other end of the high-pressure valve is connected with the two-stage pressure reducing valve through a first pipeline. The precision pressure regulating valve is provided with a first interface, a second interface, a third interface and a fourth interface. The first interface is connected with the two-stage pressure reducing valve through a second pipeline, the second interface is connected with the pressure sensor through a third pipeline, the third interface is connected with the buffer gas cylinder through a fourth pipeline, and the fourth interface is connected with a thruster. Compared with the prior art, the gas pressure regulating device adopts a combination of two-stage pressure reduction, gas capacity buffering and gas pressure closed-loop precision regulation, can supply stable and low-noise gas to the thruster, and thus realizes high-stability and low-noise thrust output.

A ground support verification method for a buffer air capacity air supply strategy of an air cooling system belongs to the technical field of satellite propulsion systems, and comprises the following steps: a ground simulation system collects execution mechanism information output by a satellite; the ground simulation system collects the working time of an attitude and orbit control thruster and a pressure air supply control electromagnetic valve used by the cold air system; the ground simulation system calculates the consumption amount and the supplement amount of the working medium gas in the gas capacitor in each period through the working duration; the ground simulation system calculates the current air capacity pressure and the pressure variation; the ground simulation system performs fault simulation and fault pressure setting; the ground simulation system converts the pressure variation into a voltage value for output, and the satellite system receives the voltage value for pressure conversion and telemetering output; the ground simulation system calculates star attitude information through a control moment generated by air injection, generates sensor information through the star attitude information, and sends the sensor information to a satellite system to form whole data interaction and verification.

The utility model discloses an oxygen generator capable of being automatically started and stopped. The oxygen generator comprises an air compressor, an efficient degreaser, a refrigerated dryer, a filter, a buffer gas storage tank, oxygen generation equipment, a dust fine filter, an oxygen buffer tank and a gas storage tank which are connected in sequence, the oxygen generating device is characterized in that a sensing piece for sensing the pressure in the air storage tank and a controller connected with the sensing piece and the oxygen generating device are mounted on the air storage tank; the air storage tank is composed of a plurality of tank bodies and pneumatic separation seats installed among the tank bodies. According to the utility model, the pressure of the gas in the gas storage tank is sensed in real time by using the sensing piece, a signal is sent to the controller, and the controller controls the oxygen production equipment to work and stop according to the set pressure, so that the automatic production is realized, the production efficiency is improved, and the labor intensity of workers is reduced; the tank bodies are separated or communicated through the pneumatic separation base, the space for storing gas in the gas storage tank is adjusted, meanwhile, a plurality of oxygen production devices can be connected at the same time to be used, and the occupied area of the devices is reduced.

This invention discloses a miniature Faraday atom filter based on Faraday anomalous dispersion and its implementation method, comprising: an alkali metal atom gas cell with antireflection films coated on both sides of the light-passing holes corresponding to the wavelengths of the alkali metal atom absorption lines, and filled with a buffer gas; a permanent magnet or coil surrounding the alkali metal atom gas cell to generate a uniform strong magnetic field parallel to the direction of light propagation; first and second polarizers located on both sides of the alkali metal atom gas cell and facing it directly; the polarization directions of the two polarizers are perpendicular to each other; and a temperature control system that heats and maintains the temperature of the alkali metal atom gas cell, and detects and controls the temperature. This invention reduces the size of the Faraday atom filter to 1 / 1000 of the mainstream size, improves mechanical stability, expands its applicability, and is expected to achieve plug-and-play functionality, greatly broadening the application of Faraday atom filters in fields such as space communication, laser technology, quantum information, and metrology.

The invention relates to a supercavitation navigation body water tunnel test high-temperature air supply system and an operation method, the supercavitation navigation body water tunnel test high-temperature air supply system comprises an air source supply processing device, the output end of the air source supply processing device is connected in series with a first-stage pressure reducing valve and a second-stage pressure reducing valve through a pipeline, the output end of the second-stage pressure reducing valve is connected with a buffer air cylinder, and the top of the buffer air cylinder is provided with a safety valve; the output end of the buffer gas cylinder is divided into two paths, one path is connected with an electric heater through a mass flow controller and a first one-way valve, and the other path is communicated with a three-way pneumatic electromagnetic valve through a gas tank pressure reducing valve; the output end of the electric heater is further communicated with a three-way pneumatic electromagnetic valve through a check valve, the three-way pneumatic electromagnetic valve is divided into two branches again, one branch is communicated with an outlet water tank through a second one-way valve, and the other branch is communicated with a test water tunnel outlet pipeline through a third one-way valve. The water tunnel test of air source state adjustment can be completed in a high temperature range of 0-600 DEG C, and the use requirement is met.

The utility model provides an air cylinder and a control system, and relates to the technical field of driving. The air cylinder comprises an air cylinder body, an air cylinder cover assembly and a piston assembly. The air cylinder cover assembly is arranged at the end of the air cylinder body, the first end of the piston assembly is movably arranged in the air cylinder body, and the second end of the piston assembly penetrates through the air cylinder cover assembly. Buffering air holes are formed in the piston assembly and the air cylinder cover assembly, the buffering air holes are configured to input gas into the air cylinder body or release gas in the air cylinder body, and the piston assembly moves based on the internal pressure of the air cylinder body. The control system comprises controlled equipment and an air cylinder. The cylinder is in contactable connection with controlled equipment; the second end of the piston assembly in the air cylinder controls the controlled device based on movement. According to the air cylinder, the buffering air holes serve as air inlet and outlet channels, the movement condition of the piston assembly in the air cylinder body is buffered, the buffering stability and effectiveness are effectively improved, and therefore the vibration reduction effect of the air cylinder is optimized.

The application discloses a phase change pneumatic working device and a working method, which comprise a heat supply mixed phase changer, a first pipeline, a second pipeline, a parallel pipeline composed of an extrusion gas source supply branch and a phase change medium supply branch, one end of the first pipeline is communicated with the parallel pipeline, the other end of the first pipeline is communicated with the heat supply mixed phase changer, the heat supply mixed phase changer is provided with an expansion working pipeline away from the one end of the first pipeline, one end of the second pipeline is communicated with the parallel pipeline, and the other end of the second pipeline is an air inlet. The extrusion gas source supply branch of the application can inject air into the mixed chamber of the heat supply mixed phase changer at the beginning of work, discharge the initial water in the mixed chamber, form a larger buffer gas chamber in the chamber, facilitate the subsequent blowing process, and effectively help the initial air to form an initial air cushion in the water tank, so that the blowing efficiency of the phase change power device in the early stage is effectively improved.

The application provides a full-autonomous pressure dynamic balance adjusting method of a double-branch cold gas propulsion system, and is suitable for a spacecraft provided with a pressure sensor cold gas propulsion system. At present, there is no system method for the validity of low-pressure pressure transmission data and the autonomous adjusting control of buffer gas container pressure in a traditional satellite cold gas propulsion system. In order to solve the above problems, the patent applicant designs a full-autonomous pressure dynamic balance adjusting algorithm of a double-branch cold gas propulsion system. The method comprises two modules: the validity of low-pressure pressure transmission data and the autonomous adjusting control of gas container pressure. The second module performs pressure adjusting calculation of double-branch buffer gas containers on the basis of the first module, and opens the pressure control electromagnetic valves of each branch to perform air supplementing operation when the gas container pressure decreases. The pressure following control strategy is adopted to realize the pressure dynamic balance control of the double-branch symmetrical discharge system, and the double-branch buffer gas container pressure autonomous adjusting and air supplementing problem of the satellite cold gas propulsion system is well solved by adopting the method.

The application discloses a kind of motor home refrigeration systems, including air supply system, intelligent adjustment vortex tube component, intelligent temperature control module and noise reduction system.Air supply system contains multistage compression air compressor, energy recovery device and buffer gas storage tank, energy recovery device recovers brake energy by pneumatic turbine, heat exchanger utilizes engine exhaust waste heat, and is cooperated with multistage compression air compressor to improve energy utilization efficiency;In intelligent adjustment vortex tube component, driving part is driven to open and close adjusting part by transmission structure, and realizes dynamic adjustment of air outlet;Temperature sensor, MCU controller with built-in PID fuzzy control algorithm are used in intelligent temperature control module, automatically adjust component action, break through the limitation of manual adjustment, realize high-precision constant temperature;Noise reduction system's noise reduction piece and spiral guide vane can reduce operating noise.The preferred structure further improves transmission stability, adjustment accuracy, energy saving and noise reduction effect, and enhances the overall performance of system.

The utility model discloses a compression-resistant draw-bar box, which relates to the technical field of draw-bar boxes, and comprises a main box frame and an auxiliary box frame hinged to one side of the main box frame, the main box frame and the auxiliary box frame form a draw-bar box main body, the main box frame and the auxiliary box frame are both composed of compression-resistant components, and the compression-resistant components are used for improving the compression resistance of the main box frame and the auxiliary box frame. A plurality of separation assemblies are arranged in the main box frame and the auxiliary box frame and used for separating storage spaces in the main box frame and the auxiliary box frame, and each compression-resistant assembly sequentially comprises an outer layer, a buffer layer and an inner layer from inside to outside. Preliminary damping is achieved through the outer layer, impact force and vibration caused by impact of external force on the outer layer are further absorbed in combination with the buffer layer, and the buffer effect is enhanced through the buffer gas filled in the elastic supporting columns, so that the compression resistance of the main box frame is effectively improved, the main box frame can bear larger external force extrusion, and the service life of the main box frame is prolonged. And the safety of articles in the main box frame is protected.

The utility model relates to a double-sided buffer material box, which comprises a box body, a lifting assembly and an air bag cushion, wherein the box body is placed on an operation table with a top plate of the box body facing upwards, two sides of a chip substrate are inserted into bearing grooves, buffer gas is filled into the air bag cushion through an inflation inlet, a worker turns over the box body to enable a bottom plate to face upwards, and the chip substrate vibrates due to turning over, so that the chip substrate is prevented from falling off. The chip substrate located at the bottom end collides with the air bag cushion, the air bag cushion effectively absorbs the impact force of the chip substrate, vibration of the chip substrate is relieved, the air bag cushion can rapidly restore to the original shape after being impacted, finally the box body is carried, and by arranging the air bag cushion, the air bag cushion cannot be permanently deformed due to long-term load; and the service life of the double-sided buffer material box is prolonged, and the effectiveness of protecting the chip substrate is improved.

The invention relates to the field of high-voltage cable metal aluminum sheath processing, in particular to a gas recycling device and method for argon arc welding of a high-voltage cable. The gas recycling device for argon arc welding of the high-voltage cable comprises an explosion-proof type recycling gas pump, a first sealing pipeline and a second sealing pipeline, an inlet of the high-precision gas filtering device is connected with an outlet of the explosion-proof recovery gas pump, and the high-precision gas filtering device is used for removing welding slag and oil dirt impurities in the recovered gas; an inlet of the buffer gas storage tank is connected with an outlet of the high-precision gas filtering device through a second sealing pipeline, and the buffer gas storage tank is used for storing the purified gas. By innovatively designing the helium recovery and circulation system, efficient recovery, purification, storage and reuse of residual helium are achieved, helium consumption and production cost are remarkably reduced, production interruption caused by frequent bottle replacement is reduced, and meanwhile the stability of welding quality is guaranteed.

A method of performing negative electron activation dissociation (negative EAD) in mass spectrometry includes introducing a plurality of negatively charged analyte ions into an ion trap positioned in a chamber and trapping said negatively charged analyte ions in a reaction region of said ion trap, introducing a buffer gas into the chamber, using an electron source positioned in the chamber and external to the ion trap to generate electrons, and accelerating the electrons to form an electron beam and introducing the electron beam into the ion trap such that the accelerated electrons are capable of ionizing at least a portion of molecules of the buffer gas to generate a plurality of positively charged ions. The accelerated electrons interact with at least a portion of the analyte ions trapped in said reaction region to cause negative EAD thereof, thereby generating a plurality of fragment product ions.

The present application relates to the technical field of flue gas pipeline anti-abrasion, particularly relates to a self-adaptive flue gas flow direction boiler heating surface tube bundle flow guide anti-abrasion device, which comprises a bend pipe body, the bend pipe body comprises an air inlet end and an air outlet end, the air inlet end and the air outlet end are both provided with a connecting flange on the outer side, the air inlet end is internally and fixedly provided with a flow guide assembly, the bend pipe body internally comprises two straight line segments and an arc line segment, the straight line segment and the arc line segment are internally provided with an anti-abrasion assembly; the present application sets an air injection cavity structure composed of an outer arc line lining pipe and a spoiler strip on the outer arc side of the bend pipe body, and continuously introduces buffer gas by cooperating with an air injection unit, so that a dynamic and continuous protective gas film is formed on the inner wall surface of the outer arc side of the bend pipe, the gas film physically "lifts up" the main flow of high-speed dust-containing flue gas and isolates it from the wall surface, so that the fly ash particles cannot directly impact and cut the pipe wall, and the impact frequency and erosion energy of the particles on the wall surface are reduced.

For a pressure packing with a buffer gas barrier into which a buffer gas is fed via a buffer gas feeding line, a sensing line is provided that is connected at a first end to a vent volume in the pressure packing with an opposite second end of the sensing line being closed, so that there is no gas flow in the sensing line. A pressure regulator is connected to the buffer gas feeding line for setting the buffer gas pressure in the buffer gas feeding line, whereas, during operation of the pressure packing, the pressure in the sensing line is used as pilot pressure for the pressure regulator for setting the buffer gas pressure.

A method for sealing an oxygen-rich process gas within a compressor or expander, including providing a rotor component having a rotating element and providing a stator component having a stationary element. Introducing a seal gas into the first sealing zone and introducing a buffer gas into the second sealing zone. Wherein at least a portion of the rotating element includes the teeth of a first labyrinth seal. Wherein the first labyrinth seal is part of a first sealing zone. Wherein at least a portion of the stationary element includes the teeth of a second labyrinth seal. And wherein the second labyrinth seal is part of a second sealing zone.

Hollow tungsten electrode coaxial MIG / MAG composite welding device and welding method. The welding efficiency of the hollow tungsten electrode coaxial wire feeding welding technology is still low. The composition comprises: a hollow tungsten electrode (1), a tungsten electrode holder (2), a protective gas cover (3), a MIG / MAG welding wire (4), an insulating porcelain tube (5), a plasma buffer gas chamber (12), a TIG power supply (13) and a MIG / MAG power supply (14); the hollow tungsten electrode is clamped by the symmetrically arranged tungsten electrode holder, the protective gas cover is located outside the tungsten electrode holder, and the upper end of the hollow tungsten electrode is fixed with the plasma buffer gas chamber; the hollow tungsten electrode is inserted with the insulating porcelain tube, the insulating porcelain tube is inserted with the MIG / MAG welding wire, and the gap between the MIG / MAG welding wire and the hollow tungsten electrode forms an ion gas channel (15). The present application is used for hollow tungsten electrode coaxial MIG / MAG composite welding.

The application discloses a ternary mixed insulation gas optimization configuration method and device, electronic equipment and medium, which are used to solve the problem that the research on the ternary mixed insulation gas is still in the initial stage, and the gas mixing method is not systematic and reasonable. The method comprises the following steps: obtaining a plurality of environmentally friendly insulation gases, and preliminarily selecting two first insulation gases and second insulation gases that meet preset gas screening conditions from the plurality of environmentally friendly insulation gases; based on the first insulation gases and the second insulation gases, a preset buffer gas is mixed to form an initial ternary mixed insulation gas; parameters of the initial ternary mixed insulation gas and SF6 gas are compared, and the initial ternary mixed insulation gas is optimized in mixing ratio according to the comparison result, so that a target ternary mixed insulation gas is obtained. Therefore, based on the parameter comparison and the optimization of the mixing ratio of the mixed insulation gas, the ternary mixed insulation gas with parameters comparable to those of the SF6 gas under the optimal configuration condition can be finally obtained.

The utility model provides a medium-pressure gas pipeline gas supply metering fluctuation buffer device, which belongs to the field of gas supply equipment, and comprises a three-way pipe and an adjusting assembly, three interfaces of the three-way pipe are respectively and fixedly communicated with a gas inlet pipe, a gas outlet pipe and an adjusting pipe, and one end of the adjusting pipe far away from the three-way pipe is fixedly communicated with a buffer tank. An air outlet of the buffer tank is fixedly communicated with a bent pipe, the end, away from the buffer tank, of the bent pipe is communicated with an air outlet pipe, an air pressure meter is arranged on the air outlet pipe, and the adjusting assembly comprises a high-pressure adjusting part arranged in the adjusting pipe and a low-pressure adjusting part arranged in the bent pipe. By arranging the adjusting assembly, gas in the pipeline can be buffered and stored when the air pressure in the gas outlet pipe fluctuates, the stability of the air pressure and the gas flow of the gas outlet pipe is guaranteed, and therefore the accuracy of gas metering is guaranteed.

This invention relates to a shock tube gas distribution method and system. During shock tube experimental gas preparation, a gas distribution column and a mixing tank are used in conjunction to actively control the internal pressure of the gas distribution column. An additional pressure-reducing stage is added between the gas cylinder and the mixing cylinder. The gas distribution column buffers large fluctuations in gas flow and pressure, resulting in a more stable gas flow and significantly improving the accuracy of the experimental gas component ratio. Simultaneously, the mixing tank has only one inlet connecting to the gas distribution column and one outlet connecting to the shock tube, improving the tank's strength and pressure-bearing capacity, and enhancing gas distribution safety.

The apparatus includes a vacuum chamber, a first component, a second component movable relative to the first component, and a gas injector. The vacuum chamber includes a first vacuum region and a second vacuum region. The first component is positioned at the boundary between the first vacuum region and the second vacuum region. The second component is positioned at the boundary within the second vacuum region and separated from the first component by a gap. The gas injector is configured to inject buffer gas into the gap between the first and second components through at least one hole located in at least one of the first and second components. The buffer gas provides a dynamic seal between the first and second vacuum regions during the relative movement of the second component relative to the first component.