9543 results about "Gas supply" patented technology

The invention relates to a membrane stack (9) for an air humidifier (1) of a fuel cell for humidifying a dry supply air stream (2) of the fuel cell by means of a moist exhaust air stream (3) of the fuel cell, - wherein the membrane stack (9) is configured in a cuboid shape, has a stacking direction (S) and four stacking sides (10) perpendicular to the stacking direction (S), - wherein the membrane stack (9) has a vertical direction (Z) parallel to the stacking direction (S), a longitudinal direction (X) perpendicular to the vertical direction (Z) and a transverse direction (Y) perpendicular to the vertical direction (Z) and perpendicular to the longitudinal direction (X), - wherein the four stack sides (10) form an air supply inlet (ZE) and an air supply outlet (ZA) facing away from each other in the longitudinal direction (X), and an exhaust air inlet (AE) and an exhaust air outlet (AA) facing away from each other in the transverse direction (Y), - wherein the membrane stack (9) comprises several membranes (11) which are permeable to moisture and impermeable to air and which follow one another in the stacking direction (S) such that the membranes (11) within the membrane stack (9) each separate a supply air path (ZP) connecting the supply air inlet (ZE) to the supply air outlet (ZA) from an exhaust air path (AP) connecting the exhaust air inlet (AE) to the exhaust air outlet (AA). Improved functional reliability can be achieved by having the membrane stack (9) have several spacers (12) which are arranged in the stacking direction (S) between two immediately successive membranes (11) in one of the exhaust air paths (AP).

The invention relates to the technical field of bearings, and provides a hydrostatic bearing gas supply system which comprises a first gas supply subsystem and a second gas supply subsystem, the first gas supply subsystem comprises a first pipeline, a first check valve, a first reaction mechanism, a second reaction mechanism and a degassing structure, and the first reaction mechanism, the second reaction mechanism and the first pipeline are sequentially connected; a reactant is arranged in the first reaction mechanism, a catalyst is arranged in the second reaction mechanism, and the first check valve and the degassing structure are arranged on the first pipeline; the second gas supply subsystem is connected with the first pipeline; when the gas source is cut off, the reactant and the catalyst are subjected to chemical reaction in the second reaction mechanism to generate water vapor and oxygen, the degassing structure is used for consuming the oxygen and generating superheated steam, and the superheated steam enters the hydrostatic bearing. The air supply system for the hydrostatic bearing provides the pure water vapor working medium for the hydrostatic bearing, so that the normal operation of the hydrostatic bearing is ensured, and the hydrostatic bearing is prevented from being damaged.

The invention discloses a temperature compensation method and system, and the method comprises the steps: receiving a valve block temperature signal collected by a temperature sensor integrated with a pressure sensor in a closed gas supply unit, and an electronic element temperature and environment temperature signal collected by a temperature sensor on a control unit PCB, generating an initial temperature-working condition data set by combining the power of the air pump and the working duration of the electromagnetic valve; performing thermal resistance network modeling on the initial temperature-working condition data set, constructing a multi-node thermal characteristic matrix, and decomposing the matrix into a plurality of sub-matrixes; performing real-time operation on the sub-matrix by using a dynamic heat balance algorithm to generate a temperature estimation result of the key component; and generating a temperature compensation control instruction according to the temperature estimation result of the key component. According to the embodiment of the invention, the temperature of the key component can be accurately estimated, dynamic compensation is realized, and the control precision and stability of the closed gas supply unit are improved.

The invention discloses a modeling and optimization control method for a gas supply system of a proton exchange membrane fuel cell, and belongs to the technical field of hydrogen energy power. The method comprises the following steps: establishing a nonlinear state space model of a proton exchange membrane fuel cell gas supply system; determining the optimal oxygen excess ratio of the system under different load currents through experiments, and fitting the optimal oxygen excess ratio into a reference function about the load currents; based on the nonlinear state space model, a model prediction control problem with tracking of the optimal oxygen excess ratio and minimization of the cathode and anode pressure difference as control targets is constructed and expressed as a constrained quadratic programming problem; and decomposing and iteratively solving the quadratic programming problem by adopting an alternating direction multiplier method to obtain the optimal control input of the current control period and act on the system. The method effectively solves the problem that traditional model predictive control is difficult to deploy in real time in a vehicle-mounted controller due to large calculated amount, so that efficient and accurate cooperative control of the proton exchange membrane fuel cell gas supply system is realized.

Disclosed is a physical simulation experiment system for vapor-liquid multiphase seepage in an underground gas storage facility in a depleted gas reservoir, including: a rock sample sealing, heating, and insulation system, a triaxial stress and confining pressure loading system, an oil-gas-water injection and pore pressure supply system, a vapor-liquid-solid three-phase separation and measurement system, an optical micro / nanofiber gas detection and monitoring system, a distributed fiber optic sensing system, and a gas supply and leakage alarm system, where the rock sample sealing, heating, and insulation system is used for accommodating and heating a rock sample; and the oil-gas-water injection and pore pressure supply system performs oil-gas-water injection into the rock sample and pore pressure maintenance. The present application aims to overcome the bottleneck problem of evaluating the dynamic sealing integrity of underground gas storage under alternating loads caused by injection and withdrawal.

The invention discloses an intelligent energy-saving control method for an air compression system based on data driving. The intelligent energy-saving control method is suitable for an industrial air compression station with multiple parallel units. According to the method, operating parameters of all air compressors and pressure and flow data of a header pipe are collected in real time, an energy efficiency model of the output flow and the gas-electricity ratio of all frequency converters is established, and the future flow requirement of the header pipe is dynamically predicted in combination with the characteristics of a fixed frequency machine. Based on a prediction result and a single-machine energy efficiency model, the basic load and the fluctuation load are distributed according to the overall energy efficiency optimization principle of the system, the start-stop sequence and the rotating speed of each unit are determined, and stable main pipe pressure, continuous gas supply, rapid response and good operation flexibility are achieved. By means of the method, the energy efficiency difference of all the units can be fully utilized, energy consumption fluctuation and equipment abrasion caused by frequent starting and stopping are reduced, and the overall energy utilization rate of the air compression system and the reliability of the industrial production process are improved.

The invention relates to the technical field of robot grabbing, and discloses a self-sensing soft gripper and a slippage detection method thereof.The self-sensing soft gripper comprises a palm body, a base assembly, a sensor assembly and a data processing and control unit, and a plurality of pneumatic soft fingers are arranged on the upper portion of the palm body; a strain layer with a driving air cavity and a limiting layer wrapping the strain layer are arranged in each pneumatic soft finger, and the substrate assembly is embedded into the limiting layer; the sensor assembly comprises a plurality of flexible sensors, is integrated on the finger contact surface, partially fits the substrate assembly and collects contact interface pressure distribution data, and the data processing and control unit is electrically connected with the sensor assembly and the air supply device, receives the data, executes a slippage detection algorithm and regulates and controls the air pressure of the driving air cavity according to a result. The substrate assembly is introduced into the limiting layer of the pneumatic soft finger, the sensor assembly and the multi-dimensional feature fusion algorithm are combined, collaborative optimization from structural design, signal enhancement to algorithm detection is achieved, and therefore the sensitivity and reliability of slip detection are remarkably improved.

The invention discloses a mold partition temperature control system based on an air film adjustable thermal resistance boundary, and belongs to the technical field of mold temperature control and thermal management. The system comprises a mold body, at least two temperature control subareas and gas film adjustable thermal resistance boundary units arranged between the adjacent temperature control subareas. The air film adjustable thermal resistance boundary unit comprises a boundary air cavity, an air injection micropore, an exhaust adjusting structure and an air supply unit. Gas enters the partition boundary area through the gas injection micropores and forms a gas film layer, and the thickness, continuity, stability and coverage range of the gas film layer are changed by adjusting the gas supply pressure, the gas supply flow and the exhaust resistance, so that the thermal coupling strength between the adjacent temperature control partitions is adjusted. The system is suitable for injection molding, pressure casting, hot pressing and composite material forming molds.

The invention discloses a polygonatum sibiricum polysaccharide extracting solution concentration scraper, and belongs to the technical field of concentration scrapers. Comprising a hollow rod, a mounting box is fixedly connected to the top end of the hollow rod, a connecting plate is fixedly connected to the upper surface of the mounting box through a plurality of bolts, and a hollow main shaft is fixedly connected to the center of the upper surface of the connecting plate; air is supplied to the fixing box through the air conveying pipe, the U-shaped pipe, the communicating pipe and the hose, the piston plate is pushed to drive the supporting rod and the scraper body to extend outwards, initial close contact between the scraper and the inner wall of the evaporation barrel is achieved, and meanwhile a second spring in the supporting rod can adjust contact pressure in a self-adaptive mode to ensure that the supporting rod is tightly attached to the inner wall of the evaporation barrel; meanwhile, the first spring is matched to drive the scraper body to be stably retracted when gas is stopped, the problem of gaps after long-term use is thoroughly solved, uneven film formation caused by missing scraping is avoided, materials are prevented from being retained in the gaps and being overheated and carbonized, and the purity and activity of the polygonatum sibiricum polysaccharide are guaranteed.

The invention relates to the technical field of laser cutting equipment, and discloses galvanized coiled plate cutting equipment which comprises a mounting frame, a guide rail structure, a cutting structure, a conveying structure, an intercepting toothed plate, a slag removal fan and a discharging structure. The cutting structure comprises a cutting seat, a laser cutting head, a separated protective cover, the intercepting toothed plate, the slag removal fan and the discharging structure; the separated protective cover is formed by splicing a plurality of splicing covers. Each splicing cover comprises an outer cover plate, an inner air box, a limiting plate, a limiting spring and an air supply hose. When the device is used, high-pressure air is blown out of the inner air box to form a protective air curtain on the splicing cover, the annular air cover and the laser cutting head, and therefore the situation that slag splashes and is intercepted, and zinc steam adheres to the splicing cover, the annular air cover and the laser cutting head can be prevented; and air is forced to be discharged along the cutting seam by the closed space formed by the separation type protective cover, so that the blowing force of the airflow to the lower edge of the notch is enhanced, and the adhering slag can be forcibly stripped.

The invention relates to the technical field of bearings, and provides a hydrostatic bearing air supply system capable of improving transient bearing capacity, which comprises a first air supply subsystem and a second air supply subsystem, the first gas supply subsystem comprises a first pipeline, a first switch valve, a reaction mechanism and a degassing mechanism, reactants are arranged in the reaction mechanism, the reaction mechanism is communicated with the first end of the first pipeline, the second end of the first pipeline is used for being communicated with the hydrostatic bearing, and the first switch valve and the degassing mechanism are both arranged on the first pipeline; the degassing mechanism is positioned between the reaction mechanism and the first switch valve; the second air supply subsystem is used for communicating with the hydrostatic bearing through a first pipeline; the first switch valve is used for being opened under the condition that the hydrostatic bearing is impacted, so that water vapor in the hydrostatic bearing enters the reaction mechanism to be chemically reacted with reactants, and water vapor and oxygen are generated; the degassing mechanism is used for consuming oxygen and generating superheated steam. Normal operation of the hydrostatic bearing can be guaranteed, and the hydrostatic bearing is prevented from being damaged due to rotor collision.

The invention discloses a high-horsepower fuel oil dune buggy gas supply assembly, and belongs to the technical field of internal combustion engine gas inlet systems, the high-horsepower fuel oil dune buggy gas supply assembly comprises an outer cover, a sealed space is limited in the outer cover, and the outer cover is provided with a gas inlet head and a gas exhaust head; the inner container is arranged in the sealed space of the outer cover, and the inner container comprises a first inner shell and a second inner shell; and the pumping piece is arranged in the first inner shell and used for pressurizing air and pumping the air to the second inner shell. Through optimization of the overall structure, high-pressure airflow is generated through the pumping piece, air is physically separated into cold air and hot air in the vortex chamber, and cold air far lower than the environment temperature can be actively provided for an engine without any refrigerant and a complex compressor; the problems that the fuel oil dune buggy is low in inflation efficiency and high in detonation risk in a high-temperature environment are solved, strong, stable and continuous power is output, and power attenuation of the high-horsepower fuel oil dune buggy caused by high-temperature protection of an engine is relieved.

The invention relates to the technical field of semiconductor packaging, in particular to a batch dust-free packaging device for power semiconductor devices and a using method of the batch dust-free packaging device for the power semiconductor devices, and the batch dust-free packaging device comprises a plastic packaging machine main body, a plastic packaging mold and a side frame, an upper plastic packaging mold and a lower plastic packaging mold are installed at the upper end and the lower end of the plastic packaging machine body respectively, a side frame is fixedly connected to one side of the plastic packaging machine body, a cleaning roller storage box is installed on one side of the side frame, and an electric push rod and an air supply and negative pressure unit are arranged in the cleaning roller storage box. Three-step dust-free cleaning of blowing, sucking and shaking is automatically carried out on a mold cavity after each time of plastic packaging; during air blowing, air is expanded and cooled twice through a conical barrel, the mold is synchronously cooled, and stubborn particles are stripped; negative pressure is formed on the surface of the cotton layer during air suction, and all residual scraps are sucked away; after cleaning is finished, the roller body returns to the storage box, the blocking block collides with the toothed plate to enable the roller body to jolt at high frequency, and attachments are shaken off into the box and are sealed and collected.

The invention relates to an MABR-based short-cut nitrification and denitrification coupled micro-aerobic biochemical treatment method, and relates to the technical field of water treatment. The device mainly comprises a two-stage MABR-PN / DN tank, a two-stage MABR micro-aerobic tank, a sedimentation tank, a gas supply system and a monitoring system, the MABR-PN / DN tank and the MABR micro-aerobic tank are respectively implanted into an MABR membrane box, sewage sequentially passes through the first-stage MABR-PN / DN tank, the first-stage MABR micro-aerobic tank, the second-stage MABR-PN / DN tank, the second-stage MABR micro-aerobic tank and the sedimentation tank, and the gas supply system is independently arranged and supplies gas to the MABR-PN / DN tank and the MABR micro-aerobic tank through pipelines. According to the invention, a short-cut nitrification and denitrification process and a low-aerobic nitrification and denitrification process are established by taking a microbial film growing on the outer surface of the MABR membrane filament as a carrier, meanwhile, a two-stage MABR-PN / DN tank and a two-stage MABR micro-aerobic tank are utilized, a nitrification liquid internal reflux system is not arranged to remove nitrogen, and the effluent index of a municipal sewage treatment plant is improved. The method has the advantages that the pollutant removal effect is good, the addition of an external carbon source is saved, the occupied area is saved, the treatment period is short, the energy consumption is low, and the sludge yield is reduced.

In order to allow an analyzer to be calibrated or a sampling channel to be purged without removing a sampling probe from a sampling location, provided are a sampling channel through which an exhaust gas from an internal combustion engine flows, an analyzer that is connected to the sampling channel and analyzes the exhaust gas, a diluter provided upstream of the analyzer in the sampling channel, a recirculated channel that branches from a branch point set between the analyzer and the diluter in the sampling channel and joins the diluter, a pump that is provided in the recirculated channel and guides part of the exhaust gas from the branch point to the diluter, an additional channel that is connected to the recirculated channel or the sampling channel and through which a calibration gas or a purge gas flows, and an opening and closing mechanism provided in the additional channel.

The utility model discloses a high-low pressure conversion structure of a composite elasticizer, which comprises a low-pressure header pipe, a high-pressure header pipe, a low-pressure drainage pipe, a high-pressure drainage pipe, a first air supply pipe and a second air supply pipe, a first filtering bubble bottle is arranged at the air inlet end of the first air supply pipe, and a second filtering bubble bottle is arranged at the air inlet end of the second air supply pipe. A low-pressure airflow adjusting device is arranged at the air outlet end of the low-pressure drainage pipe, and a high-pressure airflow adjusting device is arranged at the air outlet end of the high-pressure drainage pipe. Pressure gas output by the low-pressure drainage pipe and the high-pressure drainage pipe can be conveyed into any one of the first filtering bubble bottles or the second filtering bubble bottles through the low-pressure gas flow adjusting device and the high-pressure gas flow adjusting device respectively. The first air supply pipe and the second air supply pipe can simultaneously and independently supply air through the low-pressure air flow adjusting device and the high-pressure air flow adjusting device. The problem that two surfaces of one composite elasticizer cannot be simultaneously produced when different pressure varieties are processed can be solved, the cost is low, and the practicability is high.

The invention discloses a folding screen holding assembly and a display device, and relates to the technical field of folding display screens, and the folding screen holding assembly comprises a base, a movable frame and a pumping mechanism; the base is used for connecting the flexible display screen; the movable frame is rotatably connected to the base; an air pressure chamber is arranged between the movable frame and the base; in the forward rotation process of the movable frame relative to the base, the volume of the air pressure chamber is gradually increased; the pumping mechanism is arranged on the movable frame; the air inlet end of the pumping mechanism is communicated with the outside, and the exhaust end of the pumping mechanism is communicated with the air pressure chamber; the pumping mechanism is used for converting rotation of the movable frame into gas pumping action so as to pump external gas to the air pressure cavity, and therefore the movable frame is prevented from reversely rotating relative to the base through the air pressure effect of the air pressure cavity. According to the scheme, the movable frame rotates relative to the base to drive the pumping mechanism to supply air to the air pressure cavity, so that the movable frame is prevented from rotating reversely through the air pressure effect, and therefore the rotating angle of the flexible display screen can be locked instantly.

The invention discloses an LNG (liquefied natural gas) station site selection method and device based on multi-scene dynamic coupling, a computer and a storage medium, belongs to the technical field of LNG infrastructure planning and intelligent transportation, and solves the technical problem that LNG station site selection is difficult to accurately predict under multi-scene dynamic change. The method comprises the following steps: collecting multi-scene site selection data of the LNG filling station; data processing is carried out, and a space-time fusion big data medium table is constructed; constructing a long short-term memory network LSTM and reinforcement learning RL coupling model, and obtaining a real-time demand prediction result; a multi-constraint site selection optimization model is constructed, and an LNG gas station candidate site set is obtained; performing optimization through scene classification and feature modeling and defining a multi-scene layout criterion to obtain an LNG gas station candidate set adaptive to multiple scenes; according to the method, the site selection planning of the LNG filling station is realized by fusing the requirements and constraints of multiple scenes such as high speed, suburban, city and industrial districts, and the method is suitable for the field of administrative planning of the government and site selection planning of gas supply enterprises on the LNG filling station.

The invention relates to the technical field of power energy and ship resistance reduction, and discloses an internal combustion engine compressed air and electric supercharger ship bubble resistance reduction air supply control system which comprises an internal combustion engine set, an electric supercharger, an electric supercharger, an electric supercharger, an electric supercharger, an electric supercharger, an electric supercharger, an electric supercharger, an electric supercharger, an electric supercharger, an electric supercharger and an electric supercharger, and the internal combustion engine set serves as a power source of the whole system and generates excessive compressed air by delaying the closing moment of an intake valve during conventional operation; the gas-liquid separator is arranged on one side of the internal combustion engine set and used for separating liquid impurities of the compressed air and discharging the liquid impurities regularly; the filter is arranged on the side, away from the internal combustion engine set, of the gas-liquid separator and used for further filtering the compressed air; the first gas storage tank is arranged on the side, away from the gas-liquid separator, of the filter. Compressed air of the internal combustion engine and exhaust gas of the internal combustion engine are used for replacing traditional independent air compression equipment, the effect of reducing the requirement for additional compression equipment is achieved, the problem that a traditional ship bubble drag reduction air supply system is high in energy consumption is solved, the energy utilization efficiency of ship operation is improved, and the overall energy consumption cost is reduced.

The invention relates to the technical field of auxiliary power, in particular to an air supply device of an auxiliary power system. The device comprises an air inlet duct shell, an air inlet air pocket, an air inlet duct outer ring, an air inlet volute, a labyrinth ring, a locking unit and a rotor. The axial end face of the air inlet air pocket is coaxially connected with the air inlet channel shell in an abutting mode. The air inlet channel outer ring comprises an outer sealing cylinder and an outer extending ring which are coaxially and fixedly connected, and the axial end face of the outer extending ring is coaxially connected with the air inlet air pocket in an abutting mode. The air inlet volute comprises a volute positioning cylinder and a spiral air channel shell which are fixedly connected, and the end face of the air inlet volute coaxially abuts against the outer extending ring. The labyrinth ring is clamped between the air inlet channel outer ring and the air inlet volute, the inner peripheral wall and the outer peripheral wall are attached to the first sealing face and the second sealing face respectively, the radial linear expansion coefficient of the labyrinth ring is larger than that of the first sealing face and that of the second sealing face, the labyrinth ring comprises a ring body and a plurality of pressure reduction gear rings axially arranged at intervals, and a stepped pressure relief cavity is formed between every two adjacent pressure reduction gear rings. In this way, the problem that gas leakage is prone to occurring at the connecting position of the air inlet end shell of the auxiliary power system is solved.

The invention relates to the technical field of micro-pressure oxygen cabins, in particular to an intelligent integrated oxygen generation and coordinated regulation and control method for a micro-pressure oxygen cabin, which comprises the following steps: supplying air to a cabin body of the micro-pressure oxygen cabin by adopting an air compressor, stably increasing the pressure in the micro-pressure oxygen cabin and stabilizing the pressure at a preset treatment pressure of 30kPa-50kPa through an intelligent pressure regulation and control system, high-pressure air in the micro-pressure oxygen cabin body serves as an oxygen production source and is conveyed to the VPSA oxygen production main machine; the VPSA oxygen production main machine adsorbs nitrogen through a zeolite molecular sieve filled in the VPSA oxygen production main machine and collects oxygen; s2, pressurizing the oxygen collected in the step S2 to 0.1-0.4 MPa or above through a supercharger, conveying the oxygen back into the micro-pressure oxygen cabin body, and allowing the user to breathe through an oxygen supply device; an intelligent cooperative control system is constructed, integrated management is carried out on the whole process of pressure boosting, pressure stabilization, oxygen generation, oxygen supply, safety and environment regulation and control, the occupied area and the purchase cost of equipment are reduced, the human error risk is reduced, and the micro-pressure oxygen treatment requirement under multiple scenes is met.

The invention discloses a cooling device and glass fiber production equipment, and relates to the technical field of glass fiber production, and the cooling device comprises a spray pipe, an air supply pipeline, a control valve and a control system. Wherein the spray pipe is provided with a plurality of air nozzles distributed at intervals along the longitudinal direction, the plurality of air nozzles are used for spraying air flow towards one side deviating from the bushing so as to form an air vortex capable of reducing the temperature of the bushing and the root of the glass fiber on one side deviating from the bushing of the spray pipe, and the air supply pipeline is connected with the spray pipe and is used for supplying the air flow to the spray pipe; the control valve is arranged on the air supply pipeline and used for controlling the flow of airflow in the air supply pipeline, and the control system is in communication connection with the control valve and used for controlling the opening degree of the control valve according to the wire drawing operation state. The cooling device can stabilize the temperature of the bushing plate when the wire drawing operation is interrupted or the machine head is switched, reduces the number of waste products, and meets the cooling requirement of the bushing plate with high hole number for producing small-diameter fibers, so that the productivity and the economic benefit of a wire drawing operation unit are improved.

A rotary sealing assembly comprises a static sealing ring cover and a movable sealing ring cover, the static sealing ring cover is provided with an air inlet channel connected with an external air supply source, the movable sealing ring cover is provided with an air outlet channel connected with the interior of a tire, and a sealing assembly is arranged between the static sealing ring cover and the movable sealing ring cover. The sealing assembly is used for achieving airtight sealing of the joint of the static sealing ring cover and the movable sealing ring cover, the sealing assembly comprises a static sealing ring fixed to the static sealing ring cover and a movable sealing ring fixed to the movable sealing ring cover, and the static sealing ring and the movable sealing ring abut against each other and are in interference contact to achieve dynamic sealing. The sealing device has the beneficial effects that dynamic sealing is achieved through interference contact of the static sealing ring and the movable sealing ring, the airtight reliability in the rotating state is effectively improved, and unstable tire pressure caused by gas leakage is prevented.

The invention discloses a display screen defect detection system and a use method thereof. The use method comprises the following steps: S1, controlling a workpiece fixing module to adsorb and fix a display screen placed on a working platform; s2, acquiring edge curvature data of the display screen through a curvature identification module, and sending the edge curvature data to a central control module; s3, the central control module generates a first control instruction based on the received curvature data, the central control module drives the fluid control unit to precisely regulate and control the gas supply amount of each gas bag according to the edge data obtained by the curvature recognition module through the flexible supporting structure formed by connecting the rotatable subunits in series and the pneumatically-driven deformation driving part, and the gas supply amount of each gas bag is adjusted and controlled. And the bending radian of the self-adaptive detection module is dynamically matched with the curvature of the display screen. Metal wires and reinforcing wires in the air bag cooperatively provide structural support and cooperate with magnetic sheets to adsorb a magnetic field to stabilize the rotation angle, and it is ensured that the lighting unit and the image acquisition assembly strictly follow the curved surface profile.

The invention discloses a flow velocity measurement system adopting bubble tracing, and the system comprises a circulation loop which is internally provided with a medium storage tank and a pump body; the air supply branch is connected into the circulation loop and provided with an air storage tank, and the air storage tank is used for supplying air to the circulation loop so that bubbles can be generated in the circulation loop; and the flow velocity measuring device is used for monitoring bubbles in the circulation loop. In conclusion, the flow velocity measurement device obtains the bubble motion information from the outside of the circulation loop, and a speed measurement device such as a sensor does not need to be inserted into the circulation loop, so that disturbance to a medium flow field in the circulation loop is avoided, the measurement is more real and reliable, and the accuracy is higher.

The invention relates to a gas nanometer purification method and a purifier, and the method comprises the following steps: gas to be cleaned enters a gas-water separator for gas-liquid separation and coarse filtration, liquid impurities and large-particle solid impurities in the gas are removed, and preliminarily purified gas is obtained; on the basis of switching logic, the preliminarily purified gas is alternately conveyed to two adsorption unit groups for deep adsorption purification, adsorbent dehydration treatment and fine dust interception treatment are sequentially completed in the adsorption units, and clean gas is obtained; one part of the clean gas is conveyed to the gas storage bin to be stored, and the other part of the clean gas is conveyed to the regeneration gas bin to be pre-stored for regeneration cycle of the subsequent adsorption unit. Through the integrated method design of continuous adsorption working conditions, online regeneration cycle and automatic pressure equalizing switching, seamless connection of adsorption and regeneration and uninterrupted gas supply in the whole process are achieved, gas supply interruption and severe gas pressure fluctuation are effectively avoided, and the strict use requirements of precise manufacturing, automatic production lines and continuous production scenes for stable gas sources can be met.

The invention discloses a calcium-based incrustation deposition experimental device and experimental method. The device comprises a reaction container, a sensor module, a control unit, an automatic solution supply device and a carbon dioxide gas supply unit. The sensor module monitors the pH value of the reaction liquid and the concentration of calcium hydroxide in real time; the control unit receives the data and compares the data with a preset threshold value to control the supply device to automatically add the calcium hydroxide solution so as to maintain the stability of chemical parameters; gas is introduced into the carbon dioxide supply unit at a controllable flow rate. The experimental method comprises the following steps: setting and initializing parameters; starting constant temperature and gas introduction; the system automatically runs, and the conditions are kept stable through real-time monitoring, threshold comparison and automatic supply; and after the experiment is finished, sampling and analyzing the sediment, and exporting process data for analysis. According to the method, the problems of parameter drift and frequent manual intervention in a traditional method are solved, and the repeatability and automation level of experiments and the scientificity of data are remarkably improved.

The invention provides a dielectric barrier discharge reactor with a double-dielectric coating structure, which belongs to the technical field of plasma discharge and dielectric engineering and comprises a DBD (dielectric barrier discharge) power supply, a gas supply and flow control module and a coaxial DBD reactor body. The body is of a coaxial hierarchical structure, a coaxial high-voltage electrode is arranged on the inner side of a hollow quartz tube, a first dielectric layer and a second dielectric layer are attached to and wrap the outer side of the hollow quartz tube to form a radial dielectric constant gradient, a grounding electrode wraps the second dielectric layer, and the two axial ends of the grounding electrode are sleeved with hoops to be clamped and fixed. Two ends of the quartz tube are hermetically connected with PTFE joints with air inlets and air outlets; the DBD power source is electrically connected with the high-voltage electrode through a high-voltage wire, and the gas supply and flow control module is communicated with the PTFE connector through a pipeline. The invention solves the problems of large energy loss and poor discharge stability caused by easy uncontrollable micro-gap between the external electrode and the dielectric tube of the existing dielectric barrier discharge reactor, and is suitable for the scenes of ozone generation, surface modification, plasma catalysis and the like.

A gas separation system for producing a CH4-enriched gas from a feedstock gas containing CO2 and CH4, including a first gas separation membrane unit and a second gas separation membrane unit, in which the gas separation system includes a feedstock gas supply line connected to a gas inlet of the first gas separation membrane unit; a compression part disposed in the feedstock gas supply line; a first line connecting the retentate gas outlet of the first gas separation membrane unit and the gas inlet of the second gas separation membrane unit; a second line connecting the permeate gas outlet of the second gas separation membrane unit and the feedstock gas supply line; and a cooling part for lowering the operating temperature of the second gas separation membrane unit below the operating temperature of the first gas separation membrane unit.

A gas distributor for improving ionization efficiency of a radio frequency ion thruster, comprising a gas supply pipeline, a cavity, a flow guide ball, radial rotational flow holes, axial diffusion holes and a flow guide ball limiter, the gas supply pipeline and the cavity are integrally formed, the radial rotational flow holes and the axial diffusion holes are dispersedly arranged in the cavity, the flow guide ball is filled into the cavity through the gas supply pipeline, the flow guide ball limiter is arranged in the cavity to prevent relative movement of the flow guide ball in the cavity, and the gas distributor composed of the gas supply pipeline, the cavity, the flow guide ball, the radial rotational flow holes, the axial diffusion holes and the flow guide ball limiter is arranged at the bottom of a discharge chamber of the thruster.