798 results about "Helium gas" patented technology

The invention discloses a treatment method for helium holes of an electrostatic chuck, and belongs to the technical field of electrostatic chucks, and the treatment method comprises the following steps: S1, pretreating a gas passage opening and the surface of a substrate: cleaning the helium holes and fine cracks of the substrate, and roughening the surface of the substrate; s2, a ceramic piece is glued to the helium hole opening, wherein the ceramic piece and the side wall of the helium hole opening are tightly attached and bonded together through an adhesive; s3, filling the helium hole ceramic piece with insulating glue: filling holes, cracks and other fine interfaces; s4, grinding the insulation paste filling part to be flush with the surface of the substrate so as to keep the overall flatness; s5, performing meltallizing on the surface of the substrate by using a meltallizing process to obtain the meltallizing coating, uniformly covering the insulating glue filling layer with the meltallizing coating, and forming good combination with the substrate; and S6, grinding and polishing: after the meltallizing coating is completed, grinding or polishing the meltallizing coating to ensure that the surface of the meltallizing coating is smooth.

The invention belongs to the technical field of hydrogen adsorption, leakage and sequestration simulation experiments, and particularly relates to a system and a method for detecting the hydrogen adsorption, leakage and sequestration capacities of soil. The system comprises a simulation bin system, a hydrogen inlet system, a helium inlet system, a water inlet system and a gas outlet system, the simulation bin system is divided into an air simulation bin, a sample bin and a gas source bin by a pressurizing device and a supporting device, and a water vapor heating disc is arranged in the gas source bin. The hydrogen inlet system is in valve control connection with the gas source bin, the helium inlet system is in valve control connection with the air simulation bin and the gas source bin, the water inlet system is in valve control connection with the steam heating disc, and the gas outlet system is in valve control connection with the air simulation bin and the gas source bin. The method comprises eight steps, and the processes of adsorption, leakage and sealing storage of hydrogen in soil when the hydrogen leaks upwards under different air temperatures and air pressures in the nature are simulated. Therefore, the system and the method can provide theoretical and technical guidance for earth surface exploration of natural hydrogen.

The invention discloses a helium detection device and method for the airtightness of a bonding interface and a bonding microcavity, and belongs to the field of the airtightness of MEMS devices. The device comprises a sample holder, a mass spectrometer, a molecular pump, a mechanical pump and other components, helium is used as detection gas, and the helium is leaked only through a bonding interface through a customized and processed test sample and sample holder structure, so that the interference of other leaks in a non-bonding area on a test result is avoided. The testing method comprises the steps of sample introduction, vacuum pumping, helium filling, signal detection, dynamic and steady state testing and the like, the helium leak rate is monitored in real time by combining with a helium mass spectrometer, and the minimum leak detection rate is that high-sensitivity air tightness detection is ensured. According to the method, the airtightness of the bonding interface can be independently evaluated, and a reliable basis is provided for development of a novel bonding process. The method is suitable for air tightness detection and evaluation of the bonding process in MEMS device processing and manufacturing.

The invention relates to a method for preparing a titanium alloy coating through cold spraying. Belongs to the technical field of cold spraying. The method comprises the following steps: firstly, preparing nanoscale TC4 powder, wherein the average particle size is 20 microns; cleaning and sand blasting roughening are sequentially carried out on the surface of the TC4 substrate under the technological conditions that the air pressure intensity is 0.4 MPa, the sand blasting distance is 10 cm, and the moving speed is 70 cm / min. And spraying and depositing the prepared mixed powder on the surface of TC4 under a certain condition by using a Laval spray gun by adopting cold gas power spraying equipment to form a coating. The cold spraying conditions are that helium is used as working gas, the powder feeding amount is 20 g / min, the moving speed of a spray gun is 1 cm / s, the spraying pressure intensity is 0.3-0.9 MPa, the spraying distance is 2 cm, and the gas temperature is 400-600 DEG C. The TC4 coating is successfully prepared through the cold spraying technology, the TC4 coating is tightly combined with a TC4 base body, and the method can be used for repairing a TC4 titanium alloy workpiece.

According to the embodiment of the invention, leakage characteristic data of a plurality of sensors are collected in real time; performing filtering processing on the leakage characteristic data and then determining an area where a leakage source of the vacuum equipment is located; determining the confidence coefficient of the area where the leakage source is located, determining the confidence coefficient of the position of the leakage source based on the confidence coefficient of the area where the leakage source is located, and giving an alarm when the confidence coefficient of the position of the leakage source reaches a confidence threshold value; and injecting helium to the leakage source position of the vacuum equipment in a preset time period to perform calibration test, calculating a calibration error of the leakage source position of the vacuum equipment, and when the calibration error exceeds an error threshold value, recalculating the confidence coefficient of the leakage source position and resetting the confidence coefficient threshold value. The problems of high cost, low detection precision, slow response speed, dependence on artificial experience and incapability of real-time monitoring due to long-time use of a helium mass spectrum detection method when leakage positioning detection is performed on a leakage source of vacuum equipment in the prior art are solved.

The invention relates to a storage cryostat (2) for liquid helium (7), suitable for transferring liquid helium (7) from the storage cryostat (2) into an application cryostat (3), wherein the storage cryostat (2) comprises: - a vacuum-insulated helium vessel (6) for liquid helium (7), the helium vessel (6) having a vertical height HHB that can be filled with liquid helium (7), - a transfer line (4) for liquid helium (7), having an inlet opening (20) which opens into a lower region of the helium vessel (6), in particular into a lower fifth of the helium vessel (6), and - a convection-suppression system (9) which is arranged within the helium vessel (6) and impedes vertical convection of liquid helium (7) in the helium vessel (6), characterised in that the convection-suppression system (9) is formed in the helium vessel (6) over a height interval (IKS) with a vertical height HKS, where HKS ≥ 0.50 × HHB, and in that the convection-suppression system (9) impedes the vertical convection of liquid helium (7) in the helium vessel (6) over the region of the height interval (IKS) of the convection-suppression system (9). The invention provides a storage cryostat that enables simple and rapid transfer of liquid helium from the storage cryostat into the application cryostat, with minimised helium losses.

The invention relates to the technical field of fuel cell membrane electrode testing, and discloses a fuel cell membrane electrode airtightness testing system and method, and the system comprises a tool clamp which comprises a cavity and a clamping assembly, the cavity is in a shell shape, and the top of the cavity is open; the clamping assembly is used for clamping a sample membrane electrode and sealing and fixing the sample membrane electrode at the top opening of the chamber; the gas supply mechanism is used for supplying helium to the inner cavity of the chamber, enabling the inner side pressure of the sample membrane electrode to be higher than the outer side pressure and forming a stable pressure difference; and the detection mechanism comprises a helium leak detector and a mechanical arm, and the mechanical arm grabs the helium leak detector to carry out global detection and smelling on the outward surface of the sample membrane electrode to find leakage points and records the leakage rate of each leakage point. According to the air tightness test system and the test method, whether the membrane electrode leaks or not can be conveniently and efficiently judged, the position of a leakage point is positioned, and the area of the leakage point is estimated.

The invention relates to an installation for liquefying hydrogen, comprising a circuit for hydrogen to be cooled, a set of heat exchanger(s) in heat exchange with the circuit, a cooling system comprising a refrigerator with a cycle of refrigeration of a first cycle gas comprising helium and / or hydrogen, the circuit comprising at least one catalysis section so as to ensure conversion of the ortho-hydrogen into para-hydrogen, the circuit further comprising a first bypass portion bypassing at least one catalysis section, the downstream end of the circuit comprising two parallel branches that are not combined and are supplied respectively with the hydrogen that has passed through the first bypass portion and hydrogen that has passed through the catalysis section so as to provide two distinct hydrogen streams that have different relative proportions of ortho-hydrogen and para-hydrogen.

Filling a balloon with a volume of material, the balloon having an adhesive staging segment formed about a peripheral surface of the moldable adhesive cross sectioned profile of the moldable adhesive ring. Retaining the volume of material within an expansion cavity of the balloon by applying a tensile force in a longitudinal direction between ends of the tubular balloon neck segment to expose the moldable adhesive ring from the adhesive staging segment and compressing the exposed moldable adhesive ring to form a seal. The material can be a gas, air, Helium, etc. A tether can be inserted into the balloon neck prior to filling and sealing, where the sealing step secures the tether to the balloon.

The invention relates to an air tightness detection device and method based on resonance frequency shift of a resonant cavity, belongs to the technical field of air tightness detection, and aims to solve the problems of high equipment cost, complex operation, low efficiency and difficulty in realizing multi-parameter quantitative detection in the traditional air tightness detection technology. High-purity helium with rated pressure is filled into a to-be-detected piece through a gas compressor, the to-be-detected piece is placed in a volume-adjustable detection container after pressure maintaining, and leaked helium is pumped by a vacuum pump to flow into a resonant cavity; resonance frequency deviation caused by helium concentration changes is monitored, temperature and humidity calibration data are combined, three air tightness parameters including the leakage rate (Pa.m / s), the leakage speed (mL / min) and the leakage pressure (Pa) are calculated in real time through a microcontroller, and the air tightness grade of a to-be-detected piece is output according to the air tightness detection standard. According to the device, the volume of the detection container is adaptively adjusted through the sliding rail, and the detection efficiency and adaptability can be remarkably improved by combining frequency mixing excitation and a rapid frequency calibration technology; according to the method, resonance frequency shift-helium concentration-airtightness parameters are converted, and high-precision, multi-parameter and integrated airtightness detection is realized. The invention has the advantages of fast response speed, strong anti-interference performance, low cost and the like, is suitable for fast automatic leak detection of industrial products such as sealing devices, pressure containers and the like, and provides a new scheme for trace gas detection and gas tightness grading.

The invention discloses a temperature-variable superconducting magnet low-temperature testing system and method, and relates to the technical field of superconducting magnet low-temperature testing. The system specifically comprises a superconducting magnet circulation loop which is configured to be communicated with a superconducting magnet to be tested to form a closed circulation channel for helium flow; the heat exchanger is arranged in the superconducting magnet circulation loop and is configured to cool helium in the superconducting magnet circulation loop through heat exchange with an external low-temperature medium; the helium circulating pump is arranged in the superconducting magnet circulating loop and is used for driving helium to perform forced flow circulation in the closed-loop circulating channel; the temperature control assembly comprises a heater arranged in the superconducting magnet circulation loop; wherein the flow and the temperature of helium entering the superconducting magnet to be tested are controlled by adjusting the helium circulating pump and the heater. The invention aims to design a test system which does not need an expensive refrigerator, is simple and convenient to operate and can realize accurate control of a wide temperature zone and a forced flow cooling environment.

A hydrogen production system for producing a hydrogen gas product includes a geologic hydrogen source configured to provide a feedstock comprising hydrogen, nitrogen, and helium and purification equipment comprising two or more of: a pressure swing adsorption (PSA) device; a guard bed; a separation membrane; a reactive membrane; or a cryogenic separation device. The purification equipment is configured to receive the feedstock from the geologic hydrogen source and produce a hydrogen gas product, and production of the hydrogen gas product exhibits a carbon intensity score less than 3.0 kg CO2 eq / kg H2.

The invention discloses a preparation method of plasma activated water based on a micro-nano bubble synergistic effect, and mainly solves the technical problems that the generation efficiency of liquid-phase active particles in the plasma activated water prepared by the existing method is low, the chemical activity of the plasma activated water is difficult to maintain and the like. The preparation method comprises the following steps: introducing micro-nano bubbles into pure water until the pure water is saturated to obtain micro-nano bubble water; then performing plasma activation treatment on the micro-nano bubble water within 3 minutes to obtain plasma activated water based on the micro-nano bubble synergistic effect; the gas adopted by the micro-nano bubbles is one of air, oxygen, nitrogen or helium. The chemical activity of the plasma activated water is enhanced, the maintenance time of the activity of the activated water is greatly prolonged, efficient production and long-acting storage of the plasma activated water are facilitated, and the method has great significance in biomedical application of the plasma activated water.

The invention discloses a porous carbon particle adsorption material capable of preparing ultra-pure helium through one-step purification as well as a preparation method and application of the porous carbon particle adsorption material. The method comprises the following steps: (1) carbonizing biomass particles; (2) dipping the carbonized biomass particles in a nitrogen source-containing aqueous solution; (3) carrying out CO2 activation pore-forming and nitrogen functional group doping on the nitrogen source impregnated carbonized biomass particles obtained in the step (2) at high temperature; and (4) fully activating the nitrogen source impregnated carbonized biomass particles, performing programmed cooling, and introducing water vapor to perform secondary pore forming and oxygen functional group doping to obtain the porous carbon material. According to the method, the porous carbon particle adsorbent is prepared from natural biomass, the pore size distribution is concentrated, nitrogen and oxygen containing functional groups are rich, the adsorbent has ultrahigh adsorption and capture capacity on various impurities in the crude helium under the low-temperature condition, the impurities in the crude helium can be removed in one step, the helium is purified to reach the 6N standard, and the method is suitable for industrial production. And the application requirement of high-efficiency removal of impurities in the production process of ultra-pure helium is met.

The utility model discloses a product helium detection tooling structure and detection equipment, comprising a group of helium detection tooling and a helium detection pipeline assembly, the helium detection tooling comprises a support, a cylinder, a detection tooling, an indicating lamp and an electromagnetic valve group; an air cylinder penetrates through the upper end of the support; the output end of the air cylinder is connected with an upper tool of the detection tool, and a lower tool of the detection tool is installed on the support. An indicating lamp and an electromagnetic valve group are mounted on the side edge of the support; and the helium detection tool is connected with the helium detection pipeline assembly. According to the helium detection tool structure and the detection equipment, through combination of a series of designed functional modules, the space is fully utilized, the overall structure is compact, and the safety of operators in the equipment operation period can be effectively protected while the detection quality is guaranteed.

The invention relates to the technical field of high-temperature alloys, and provides a low-segregation high-temperature alloy and a control method for segregation defects of the high-temperature alloy, and the control method comprises the following steps: S1, according to the ingot type size of a high-temperature alloy vacuum consumable ingot, determining the height of the high-temperature alloy vacuum consumable ingot corresponding to the reduction of the melting speed in a vacuum consumable steady-state smelting period; according to the content range of segregation elements in the high-temperature alloy, the melting speed decreasing range is determined; according to the ingot shape size of the high-temperature alloy vacuum consumable ingot, the helium pressure drop range in the heat top sealing period is determined; and S2, carrying out vacuum consumable smelting on the high-temperature alloy according to the vacuum consumable smelting process determined in the step S1. According to the control method provided by the invention, the problem of black spot control of high-temperature alloy vacuum consumable ingots with different ingot types and alloy component marks is solved, and the low-segregation high-temperature alloy consumable ingots are prepared.

A hydrogen production system for producing a hydrogen gas product includes a geologic hydrogen source configured to provide a feedstock comprising hydrogen, nitrogen, and helium and purification equipment comprising two or more of: a pressure swing adsorption (PSA) device; a guard bed; a separation membrane; a reactive membrane; or a cryogenic separation device. The purification equipment is configured to receive the feedstock from the geologic hydrogen source and produce a hydrogen gas product, and production of the hydrogen gas product exhibits a carbon intensity score less than 3.0 kg CO2 eq / kg H2.

The invention provides a deck type helium airship unmanned aerial vehicle platform which comprises an unmanned aerial vehicle platform body and further comprises two air bags arranged in parallel left and right, at least two sets of distributed propelling units and an energy module. The unmanned aerial vehicle platform is fixed between the two air bags, the two air bags are connected with each other through a rigid connecting structure and keep relative positions fixed, a balance weight storage part is arranged at the bottom of the unmanned aerial vehicle platform, and the unmanned aerial vehicle platform is provided with a bin door communicating with the balance weight storage part and a berth used for taking off and landing of an unmanned aerial vehicle. The system can be used as aerial mother port cluster operation and maintenance, and full-process automatic management of receiving, launching, charging and data interaction of the unmanned aerial vehicle is realized.

The utility model discloses a helium dehydrogenation and purification device taking air as regenerated gas. The helium dehydrogenation and purification device comprises a catalytic dehydrogenation reactor, a first adsorption reactor and a second adsorption reactor, a refrigerant of the heat exchanger is connected with a feed gas source and a compressed air source, a refrigerant outlet of the heat exchanger is connected with an inlet of the catalytic dehydrogenation reactor, an outlet of the catalytic dehydrogenation reactor is connected with a heating medium inlet of the heat exchanger, and a heating medium outlet of the heat exchanger is connected with an inlet of the steam-water separator; inlets of the first adsorption reactor and the second adsorption reactor are connected with an outlet of the steam-water separator and a regenerated waste gas outlet; outlets of the first adsorption reactor and the second adsorption reactor are connected with a product gas outlet and a compressed air source; a hydrogen analyzer and a flow meter are arranged on a pipeline for connecting a refrigerant inlet of the heat exchanger with the feed gas source, and a flow controller and a flow control valve are arranged on a pipeline for connecting the refrigerant inlet of the heat exchanger with the compressed air source; the flow controller is electrically connected with the hydrogen analyzer and the flow meter and can control the opening degree of the flow control valve. The problem that hydrogen-containing gas cannot be provided as regeneration gas in most helium catalytic dehydrogenation purification scenes is solved.

The invention relates to the technical field of analysis and detection, in particular to a method for determining residual epichlorohydrin in dihydroxypropyl theophylline. The residual epoxy chloropropane in the dihydroxypropyl theophylline is detected by adopting GC-MS (Gas Chromatography-Mass Spectrometer); chromatographic conditions are as follows: a chromatographic column is VF-624ms, 30m * 0.25 mm * 1.4 mu m; the carrier gas is helium, the column flow velocity is 0.95-1.05 ml / min, and the split ratio is 10: 1; the temperature of a sample inlet is 230-250 DEG C; the sample injection volume is 1 microliter; mass spectrum conditions are as follows: an ion source: EI; the temperature of the ion source is 220-240 DEG C; the temperature of a quadrupole rod is 140-160 DEG C; and the temperature of the auxiliary heater is 250-270 DEG C. Compared with the prior art, the analysis method provided by the invention has the advantages of high sensitivity, strong separation capability and rapidness, and can accurately quantify epichlorohydrin in the test sample.

The invention relates to the technical field of seawater desalination of gas cooled reactors, in particular to a hot film coupling seawater desalination device integrated with a small modular gas cooled reactor, which comprises a first circulating mechanism, a second circulating mechanism, a third circulating mechanism and a fourth circulating mechanism, the first circulating mechanism comprises the small modular gas cooled reactor, and high-temperature and high-pressure helium generated by the small modular gas cooled reactor sequentially circulates through pipelines; the generator is used for converting the high-temperature and high-pressure helium generated by the modularized small-sized gas cooled reactor into desalinated seawater through the first circulating mechanism so as to provide electric power; the generator starts the reverse osmosis membrane desalination device and the multi-effect distillation seawater desalination device to carry out double-channel seawater desalination; the first circulating mechanism drives the generator to synchronously carry out sea water desalination operation on the reverse osmosis membrane desalination device and the multi-effect distillation sea water desalination device through two channels, so that the link of carrying out steam turbine power generation through intermediate steam heat exchange is omitted, traditional steam is replaced, the operation efficiency in winter is improved, and the power consumption is reduced; the membrane reverse osmosis pretreatment scale and cost are reduced.

The invention discloses a regenerative cryogenic helium circulating refrigerating system which comprises a vacuum cold box (1), a circulating fan (2), a valve box (3) and a low-temperature vacuum hose (4), the circulating fan is connected with the valve box through a pipeline, the vacuum cold box is connected with the valve box through a connecting pipe, a cold box flange (11) is arranged at the top of the vacuum cold box, and the low-temperature vacuum hose (4) is arranged in the cold box flange. One end of the low-temperature vacuum hose is arranged on the cold box flange and penetrates into the cold box cavity, the other end of the low-temperature vacuum hose is connected with the user load, at least one refrigerating machine is arranged on the flange, the circulating fan is used for pumping helium into the valve box in a circulating mode, and after the helium is cooled through the vacuum cold box, the user load is cooled through the low-temperature vacuum hose. According to the system, cold energy regenerative heat recycling during air returning can be achieved, the heat exchange efficiency of the system can be remarkably improved through the innovative design of the coil pipe type heat exchanger and the cold head heat exchanger, low-temperature refrigeration with the minimum of 10K can be achieved under the condition that no external cold source such as liquid nitrogen exists, and a solution is provided for the frontier fields such as nuclear fusion and the superconducting technology.

The invention provides a preparation method and application of a pure copper coating, and relates to the field of surface functional coatings, and the preparation method comprises the following steps: preparing pure copper powder, and carrying out sand blasting treatment on the surface of an aluminum alloy substrate; the aluminum alloy substrate is fixed in a closed cold spraying chamber, and pure copper powder is loaded into helium cold spraying equipment in the closed cold spraying chamber; vacuumizing until the pressure in the closed cold spraying chamber is lower than a preset pressure threshold value and the oxygen content in the chamber is lower than a preset value; helium in a buffer tank is adopted as main gas and powder feeding gas, and a pure copper coating is formed on the surface of the aluminum alloy substrate through spraying of helium cold spraying equipment; and the helium circulation system is synchronously started to recover helium in the cavity, and the helium is compressed into the buffer tank after being filtered and cooled, so that helium circulation is realized. The method adopts the circulating helium atmosphere to avoid the problem that the impurity content of the coating is increased due to high-temperature oxidation of the copper coating, the oxygen content of the coating is remarkably reduced, and the particle interface bonding is improved, so that the electric conduction and heat conduction performance of the pure copper coating is improved, and the helium use cost is reduced.

The invention relates to a liquid source conveying system for TEOS, a control method and related equipment. The system comprises a liquid source storage device, a buffer storage device, a material pressing helium pipeline, a helium removal treatment device, a multi-branch conveying assembly, a source changing pipeline assembly and a control module. By arranging the buffer storage device, when the liquid source storage device is replaced, the buffer storage device can continuously supply liquid to the process end, so that the liquid supply stability of the semiconductor process equipment is ensured; through the arrangement of the helium removal treatment device, the helium removal treatment can be carried out on TEOS liquid driven by pressing helium, so that the helium-removed TEOS liquid is supplied to the process end; all the automatic valve assemblies are automatically controlled through the control module, automatic control over the liquid supplementing process, the liquid supplying process and the source changing process is achieved, and especially when the liquid source storage device is automatically replaced, pollution or impurity introduction caused by the volatile and unstable characteristics of TEOS in manual operation is avoided.

The application provides a hydrate membrane, a preparation method thereof, a membrane assembly and a membrane separation method. The hydrate membrane comprises a porous support layer and a hydrate separation layer located on at least one side surface of the porous support layer; the hydrate separation layer comprises cage-type hydrate crystals formed in situ through phase transition under the condition that the temperature is 0-20 DEG C and the pressure is 0.1-6 MPa by using a hydrate mother liquor containing a thermodynamic promoter, and the average pore size of the hydrate separation layer is 0.35-0.55 nm. The hydrate membrane has high separation selectivity and high permeation flux, and has good rigidity and uniformity of membrane pores, high long-term operation stability, is convenient for in-situ preparation of large-area separation membranes, and can realize efficient recovery and utilization of helium in a hydrocarbon raw gas.

The application provides a geothermal water cascade utilization based combined production system and method of heat, electricity and helium, which comprises, in sequence, a geothermal exploitation pretreatment unit, a thermal energy cascade utilization unit, a water-soluble helium gas purification and storage unit, a tail water reinjection unit and a valve control unit, wherein the valve control unit is provided with valve groups matched with the units according to functions. According to the application, the geothermal exploitation pretreatment unit, the thermal energy cascade utilization unit, the water-soluble helium gas purification and storage unit and the tail water reinjection unit are connected in sequence to realize the collaborative operation of the geothermal water cascade utilization and the water-soluble helium extraction. The valve control unit matched according to functions and the system interlocking control logic are provided to provide a targeted control structure for each process unit, realize the accurate control of process parameters and the flexible switching of working conditions, provide a structural basis for the online maintenance of subsequent equipment and the recycling of helium extraction, improve the overall operation stability of the system and improve the comprehensive utilization efficiency of geothermal resources and water-soluble helium resources.

The utility model discloses a helium injection device for a magnetofluid ATM (automatic teller machine), which relates to the technical field of vacuum leak detection and comprises a high-pressure helium bottle, the top of the high-pressure helium bottle is sequentially connected with a constant-pressure valve body and a quick exhaust valve from bottom to top, and one end of the quick exhaust valve is connected with a second spray pipe. The second spray pipe can be wound and collected into the storage box, the second spray pipe can be pulled according to needs to change the use length of the second spray pipe, the application range of the second spray pipe is wider, meanwhile, when the second spray pipe is not used, the winding disc can be driven under the torsion of the clockwork spring to conduct winding treatment on the second spray pipe, the second spray pipe can be automatically wound, the second spray pipe is prevented from being scattered outside, and the second spray pipe is convenient to store; in cooperation with a cleaning assembly, dust attached to the surface of the second spraying pipe can be cleaned, use is convenient, and practicability is higher; through the fixing assembly, the pipe clamps can be disassembled and assembled conveniently and rapidly, and the nuts can be twisted according to needs so that the connecting and fixing effect of the two pipe clamps can be adjusted conveniently.

A double optical path gas chamber, a double optical path detection system and a gas concentration detection method belong to the technical field of gas concentration detection. The gas chamber comprises first and second beam splitting prisms and first and second concave mirrors. The first and second concave mirrors are oppositely arranged and sealed to form a Helium gas cell. The center and the edge of the first concave mirror are respectively provided with a short optical path inlet hole and a long optical path inlet hole, and the center and the edge of the second concave mirror are respectively provided with a short optical path outlet hole and a long optical path outlet hole. A light beam is split by the first beam splitting prism. A short optical path light beam enters the gas cell through the short optical path inlet hole and is emitted from the short optical path outlet hole. A long optical path light beam enters the gas cell through the long optical path inlet hole and is emitted from the long optical path outlet hole after multiple reflections in the cell. The emitted long and short optical path light beams are combined by the second beam splitting prism and are emitted. The system comprises a light source, the above-mentioned gas chamber and a spectrometer. The method is realized based on the above-mentioned system. The present application simultaneously meets the detection needs of long and short optical paths, realizes ultra-low concentration detection and has an ultra-high range.

The application provides a device for coupling xenon isotope separation and neon-helium purification separation and a use method thereof. Based on various non-low-temperature gas separation technologies, through multi-stage module cooperation, high-efficiency enrichment of xenon isotope raw material gas under non-low-temperature conditions and purification and purification of air separation crude neon-helium gas are coupled, including thermal coupling and intermediate material coupling. The crude neon-helium gas produced in the process is fully utilized, the energy consumption and operation complexity are significantly reduced, and the development advantage can be further improved.

The application discloses a helium low-temperature purification pressure building device and a pressure building method, which comprise a flash evaporation unit, a purification unit and a heat recovery unit connected in sequence. In the application, the product gas of the liquid air separator is used to build pressure for the adsorber under the regeneration pressure building in the high-pressure working state, so that the adsorber under the working state is prevented from charging pressure for the adsorber under the regeneration pressure building and the pressure of the adsorber under the working state is prevented from being lost. Since the pressure difference between the liquid air separator and the adsorber under the regeneration pressure building is large, the high-pressure impact is easy to cause the damage of the equipment, the pressure building process is arranged in the purification process, the time required for the pressure building is reduced, the adsorber under the working state is saturated, the adsorber under the regeneration state is built in pressure, automatic switching can be realized, the continuous production of the product high-purity helium gas is realized, and the use demand of the high-purity gas is met.