4870 results about "Gas holder" patented technology

The invention relates to the technical field of dust removal equipment, in particular to efficient, energy-saving and environment-friendly dust removal equipment which comprises a moving assembly installed on the indoor top. The air exhaust end of the air exhaust equipment is connected to the filtering assembly, the filtering assembly comprises an outer cylinder, the ends of the branch pipes are each provided with a sealing assembly, the telescopic cylinders are connected with the high-pressure air storage tank, air blown into the sealing assemblies by the telescopic cylinders can enter the filtering cylinders, and when the filtering cylinders below one sealing assembly are cleaned, the sealing assemblies are arranged on the outer cylinder, and the sealing assemblies are arranged on the sealing assemblies. The other sealing assemblies and the filter cartridge are still in a working state, air blown out from the port of the air pipe can drive surrounding air to flow towards the port of the air inlet pipe, the port of the air inlet pipe is matched for air exhaust, the blown air is sucked into the outer barrel, and the dust removal effect and the dust removal range are further improved in cooperation with operation of the moving assembly; the self-cleaning function of the filter screen of the dust removal equipment is achieved through cooperation, the situation that the normal production and processing operation is affected by shutdown when the filter cylinder is cleaned is effectively avoided, and the dust removal range and the dust removal effect are effectively improved.

The embodiment of the invention provides an air supply system and an air supply method of an air suspension. The air supply system of the air suspension comprises an air storage tank, a plurality of air springs, an air supply valve body unit, a dryer, a heating element, an electronic control unit and a humidity sensor. The air storage tank is used for storing compressed air; the air spring is used for inputting high-pressure gas to each wheel of the vehicle; the air supply valve body unit comprises a reversing valve; the reversing valve is arranged on an air channel, so that the air supply system is driven to be switched between the air suction mode and the reverse blowing mode through reversing of the reversing valve; the cavity of the dryer is communicated with the air supply valve body unit through an air channel; the heating element is arranged in a cavity of the dryer, the humidity sensor is arranged on the air channel, and the humidity sensor corresponds to the electronic control unit in a signal mode. Therefore, the air supply system of the air suspension has the advantage that the regeneration efficiency of the dryer is improved.

The invention discloses a disilane mixed gas dissolving and mixing system and a control method, and relates to the technical field of gas mixing preparation, the disilane mixed gas dissolving and mixing system comprises seven modules, a storage module realizes accurate pressure control through a honeycomb gas storage tank matrix, and the tank wall adopts a nano composite structure for corrosion prevention; the premixing module forms a chaotic flow field by using a double-helix micro-channel and pulse injection; the reaction module is combined with supercritical and electromagnetic resonance to accelerate the reaction; the monitoring module fuses multispectral detection; the control system is based on deep reinforcement learning, in addition, a gradient condensation-membrane distillation separation module, a bionic safety interlocking module and other modules are further arranged, and all the modules cooperate to achieve efficient mixing and production. According to the device and the method, high-precision preparation of disilane mixed gas, precise pressure-controlled material storage, molecular-level efficient mixed reaction, multispectral precise monitoring, intelligent regulation and control, stability guarantee, high safety interlocking and intelligent maintenance are realized, faults can be reduced, the product quality and the production efficiency are improved, and the cost is reduced.

The invention discloses an approximate constant pressure type pressurized hot water heat storage system, and relates to the technical field of heat storage systems of compressed air energy storage power stations. The system comprises an under-pressure hot water heat storage system, and the under-pressure hot water heat storage system comprises a high-temperature water tank and a low-temperature water tank; the high-temperature water tank and the low-temperature water tank are filled with pressure-stabilizing gas and are connected through a communicating pipe; the pressure stabilizing system B comprises a buffer tank, a high-pressure gas storage tank and a pressure stabilizing gas pressurization system; the buffer tank is connected with the communicating pipe, and the high-pressure gas storage tank is connected with the communicating pipe. Compared with a high-pressure and high-temperature hot water heat storage system in the prior art, the air side pressure fluctuation range of the high-temperature water tank and the low-temperature water tank can be effectively reduced, stress fatigue of the high-temperature water tank and the low-temperature water tank is effectively relieved, the service life of the high-temperature water tank and the low-temperature water tank is prolonged, safety is improved, design difficulty and adopted measures are reduced, and the manufacturing cost of the storage tank is reduced. The invention further relates to an operation method of the approximate constant pressure type pressurized hot water heat storage system.

The invention provides a compressed air water pumping and energy storage system which comprises an air compression set, a first heat exchanger, a second heat exchanger, an energy storage device, a third heat exchanger, a fourth heat exchanger, a turbine unit, a water pump unit, a normal-pressure water storage tank, a water wheel set, a water-gas co-containing cabin and a high-pressure air storage tank. A first throttling valve is arranged between the high-pressure gas storage tank and the water-gas co-containing cabin, and the water pump set, the normal-pressure water storage tank, the water wheel set, the water-gas co-containing cabin and the high-pressure gas storage tank are sequentially connected to form a first energy storage stage. The compressed air water pumping energy storage system is adopted, the characteristics of compressed air energy storage are combined, air is compressed and stored in a high-pressure air storage tank in the energy storage process, in the energy release process, high-pressure air is released, water in a water storage tank is compressed to be in a high-pressure state, and high-pressure water pushes a water turbine to do work for power generation.

The present invention discloses an intelligent self-powered active suspension with multi-level adjustable height in the automotive field and a working method thereof. The rod ends of the cylinder rod extending into the oil cylinder are all guide ends composed of a guide, a screw and a nut. There is no seal between the outer wall of the guide and the inner wall of the oil cylinder. The screw and the cylinder rod are provided with oil guide grooves that penetrate the rodless cavity and the rod cavity, and there is no need to consider the sealing problem. A non-closed working oil circuit is adopted, and a suspension height adjustment device comprises a first and a second height adjustment oil and gas cylinders with unequal volumes. The first height adjustment oil and gas cylinder, a third solenoid valve, a high-pressure gas storage tank, a first non-return valve, an electric air compressor unit and a low-pressure gas storage tank are connected in series in sequence, and energy can be pre-stored in advance. Four-speed height control is achieved by two parallel-connected height adjustment oil and gas cylinders with different volumes, so that the vehicle body can be at a low height when the vehicle is driving at high speed, at a normal height when the vehicle body is in urban conditions, and at a height when the vehicle body is driving on bumpy roads. The vehicle body can also be rescued from a pit when the wheel is stuck in it.

The invention discloses a multi-mode gas mixing device, relates to the technical field of gas mixing, and solves the problems that when an existing gas mixing cabinet does not have external power for mixing, the mixing efficiency is low, the mixed gas is discharged while the gas is mixed, the condition of non-uniform mixing is easily generated, the working mode is single, and the mixing efficiency is low. The device comprises a bottom plate, a gas mixing cabinet is arranged at the top end of the bottom plate, a control cabinet is arranged on one side of the gas mixing cabinet, and a gas mixing tank and a gas storage tank are arranged in the gas mixing cabinet. Through cooperative work of the structures, gas mixing can be more uniform, the gas mixing speed is increased, the use flexibility of the gas mixing device is improved, the gas mixing device has multiple different working modes, when the pressure of gas in the tank body is too high, the gas can be rapidly discharged from the tank body, and potential safety hazards are avoided.

The invention discloses a pressure storage and heat storage coupled regenerative heat pump power storage system and a regulation and control method thereof. The system is composed of an electric-power generation integrated unit, an energy storage compression and energy release expansion integrated unit, an energy storage expansion and energy release compression integrated unit, a high-temperature heat exchanger, a backheating heat exchanger, a cold energy absorption heat exchanger, a heat storage and cold storage storage tank, a high-pressure gas storage tank and the like. And an energy storage / energy release loop, a heat storage / heat release loop, a cold storage / cold release loop and a pressure heat coupling loop are formed by connecting pipelines. In the energy storage mode, the compressor unit is driven by electric energy to conduct multi-stage compression, and compression heat and expansion cold are stored in the high-temperature storage tank and the low-temperature storage tank correspondingly. In the energy release mode, the heat storage medium and the cold storage medium are sequentially released to supply heat or cold to the circulating working medium, and the expansion unit is driven to drive the generator to generate electricity. According to the method, bidirectional operation of energy storage and energy release is achieved through valve switching and circulation control, and power output and load change are adjusted within a second level through a pressure-heat coupling mechanism.

The present invention relates to a method for filling a gas cartridge (200) with pressurized gas or liquefied gas, the gas cartridge (200) comprising a container (120) and a valve (100) which are connected to one another by a threaded connection that can be tightened and loosened by rotation about a longitudinal axis (L), the valve (100) preferably having at least one primary opening (101), which opens laterally with respect to the longitudinal axis (L), for the admission and discharge of gas when the valve (100) is open, the method having the following method steps: i. at least partially loosening the threaded connection; ii. filling the container (120) with pressurized gas or liquefied gas through a. a thread flight (104) of the at least partially loosened threaded connection; and / or b. a secondary opening (102), which opens laterally with respect to the longitudinal axis (L) and which has been opened up as a result of the threaded connection having been partially loosened, of the valve (100); and / or c. a valve-side recess (105), which has been opened up as a result of the partial loosening of the threaded connection, in a thread flight (104) of the threaded connection; iii. tightening the threaded connection.

The utility model provides a thermal power and compressed air energy storage coupled deep peak regulation coaxial unit which comprises a thermal power station boiler and further comprises a power generator, a steam turbine unit, a compressor unit, a motor / power generator and an expansion unit which are coaxially connected in sequence. The gas output end of the compressor unit is connected with the input end of the gas storage tank, and the output end of the gas storage tank is connected with the gas input end of the expansion unit; the steam turbine unit comprises a high-pressure cylinder, an intermediate-pressure cylinder and a low-pressure cylinder which are coaxially connected in sequence; a superheated steam pipeline of a thermal power station boiler is communicated with the gas input end of a high-pressure cylinder, the gas output end of a low-pressure cylinder is connected with the shell pass input end of a condenser, and the shell pass output end of the condenser is connected with the tube pass of a low-pressure heater through a condensate pump. The tube pass of the low-pressure heater is sequentially connected with the tube pass of the deaerator and the tube pass of the high-pressure heater, and the tube pass of the high-pressure heater is connected with the thermal power station boiler to form a loop. The advantages of the compressed air energy storage technology are fully exerted, peak regulation can be achieved on the premise that the operation efficiency of the thermal power generating unit is not reduced, meanwhile, the rapid regulation characteristic and flexibility of the unit are improved, and the capacity of the unit for responding to the peak regulation requirement of a power grid is greatly improved.

The invention discloses an automatic cleaning system and method for a laser radar on an intelligent mine truck, and the system comprises a vehicle-mounted laser radar, an intelligent driving domain controller, a cleaning system controller, a cleaning liquid pot module, an air storage tank module, an air pump, a liquid path electromagnetic valve, an air path electromagnetic valve, a nozzle module and the like, and forms a vehicle-mounted laser radar cleaning air path and a laser radar cleaning liquid path. All the modules are connected into the whole system through wire harnesses, a gas path is matched with a liquid path, the integration degree is high, and the cleaning strength is high; the smoothness of an air path is ensured through an air pump, an air path electromagnetic valve and a pressure sensor, and a liquid path nozzle is heated in a low-temperature environment through an electronic water pump, a temperature sensor and a liquid path electromagnetic valve, so that the liquid path nozzle is not frozen, and the smoothness of the liquid path is ensured; the cleaning method comprises the steps of cleaning request, cleaning process, detection after cleaning, gas path and liquid path circulation switching in the cleaning process, cleaning liquid residue is avoided, and the cleaning requirement is met.

The invention relates to the technical field of energy storage, in particular to a constant-pressure compressed gas energy storage system and a using method. A constant-pressure compressed gas energy storage system comprises a constant-pressure gas storage tank suitable for constant-pressure storage of compressed gas; the expansion exhaust assembly comprises an air outlet pipeline and a first expansion machine, the air outlet pipeline communicates with the constant-pressure air storage tank, the first expansion machine is arranged on the air outlet pipeline, and the first expansion machine is suitable for being connected with a generator set; the heat storage assembly comprises a circulating heat storage pipeline and a heat storage device, the circulating heat storage pipeline is provided with a liquid outlet branch, the liquid outlet pipeline is communicated with the constant-pressure gas storage tank, heat storage fluid flows in the circulating heat storage pipeline, and the heat storage fluid is contained in the constant-pressure gas storage tank. The problems that in the energy releasing process of a constant-volume compressed gas energy storage system, compressed gas continuously flows out of a gas storage device, the pressure in the gas storage device can be gradually reduced, after the pressure of the compressed gas is reduced, the compressed gas reaches the interior of an expansion machine, then full-power power generation cannot be achieved, and then the output total work of the power generation system is limited are solved.

The invention relates to the technical field of air compression stations, in particular to an air bearing-based digital energy air compression station with a noise reduction effect, which comprises a machine room, and a screw air compressor, a cooler, an oil-water separator, a first air storage tank, a dryer, a filter and a second air storage tank which are sequentially connected are arranged in the machine room. The first air storage tank is further connected with a first air supply pipe, and the second air storage tank is further connected with a second air supply pipe. An air bearing is selected for the screw type air compressor, a third air supply pipe is arranged between the filter and the second air storage tank, the third air supply pipe is connected with the air bearing, and part of compressed air is continuously input into an air path of the air bearing through the third air supply pipe. According to the screw type air compressor, mechanical friction can be avoided through the air bearing, so that noise is further reduced, the noise reduction effect of the digital energy air compressor is improved, and compressed air can be conveniently obtained by the air bearing in an air compression station.

The invention relates to the field of instrument testing, and discloses pulse controller testing equipment, which comprises a signal simulation unit, a parameter acquisition unit, a gas circuit control unit, a main control unit and a test board, the signal simulation unit generates simulated dust concentration and pressure difference signals; the parameter acquisition unit is used for acquiring blowing interval time, duration time and output voltage signals in real time; the air path control unit provides compressed air with adjustable pressure through an air storage tank, a pressure regulating valve and a pulse valve driving module, and a pressure sensor and a flow sensor feed back signals in real time so as to adjust air path parameters. The main control unit controls the test process and judges whether the pulse controller is abnormal based on the collected data; the test bench realizes equipment fixation and connection through a clamp and an electrical / pneumatic port. The device calculates a comprehensive abnormal index through standardized parameters, supports multi-stage early warning and fault determination, and is suitable for automatic testing of the pulse controller.

The invention discloses a high-temperature supercritical carbon dioxide steady-state jet flow experiment device and method, and the device comprises a liquid storage tank, a liquid booster pump, a plunger pump, a first mass flow meter, a second mass flow meter, a heating section, a first electric control valve, a first-stage cooler, a second-stage condenser, a back pressure valve, and a main loop system composed of related pipe fittings and equipment. The gas supply system consists of a carbon dioxide gas cylinder group, a gas storage tank, a gas booster pump and related pipe fittings and equipment; and the jet experiment section consists of a spray pipe, a second electric control valve, an electric stop valve and related pipe fittings and equipment. The invention further provides an experimental method of the device. According to the invention, the steady-state jet flow experiment research of supercritical carbon dioxide under the high-temperature condition can be realized.

According to the vehicle-mounted air quality monitoring reminding device applied to the field of air quality monitoring, the pretreatment chamber, the temperature sensor and the detector are utilized, corresponding cooling pretreatment can be conducted on sucked air, high-temperature air in a vehicle body is prevented from making direct contact with a probe of the detector for detection, the service life of the detector is prolonged, and the service life of the detector is prolonged. After cooling, the driving motor and the magnetomotive piston piece are used for carrying out oscillation mixing treatment on the gas which is subjected to standing cooling for a period of time in the isolation chamber, and then the probe extends into the isolation chamber for detection, so that a relatively accurate detection result can be obtained, and the authenticity and reliability of detection are ensured; by means of the gas storage tank and the exhaust pipe, residual floating dust and other objects in a subsequent magnetomotive piston piece and an isolation chamber can be purged by means of collection of part of gas when the gas is exhausted, and residual interference is avoided.

The invention relates to the technical field of orchard planting, in particular to an orchard intelligent gas explosion deep scarification fertilizer applicator which comprises a supporting table used for supporting a device body, a protective frame is mounted at the top of the supporting table, and a gas pressure controller used for soil gas explosion deep scarification and an automatic driving control controller are mounted in the protective frame. By arranging the fertilizing mechanism, the device can sow seeds while loosening soil through gas explosion, the gas pressure of a gas storage tank is controlled through a gas pressure controller, when the seeds move into a through pipe from a feeding pipe, the seeds slide directionally due to the arrangement of a wedge-shaped surface, and the position of a gas outlet plate is adjusted through an electric push rod; the multiple sealing blocks form a closed space for the partition plate area, the multiple limiting blocks divide the seeds in the multiple through pipes in a limited mode, and the multiple air outlets correspond to the multiple feeding holes, so that air impact acting force is released to the seeds, the seeds can be released through the discharging holes, and meanwhile the loosening effect can be generated on internal soil.

The invention discloses a vehicle-mounted oxygen generation system, a vehicle system, a vehicle-mounted oxygen generation control system and a control method.The vehicle-mounted oxygen generation system comprises a shell, a molecular sieve and an oxygen storage tank, and the molecular sieve and the oxygen storage tank are arranged in the shell; the air inlet is configured to be connected with an air suspension air tank in a vehicle air suspension system outside the shell so as to provide air for the molecular sieve; one end of the air pipe is communicated with an outlet of the oxygen storage tank, the other end of the air pipe is configured to be communicated with a vehicle cab outside the shell, and a controllable electronic valve is arranged on the outlet of the oxygen storage tank or the air pipe. New configuration optimization is made based on an air compressor and an air storage tank of an existing vehicle air suspension system, the oxygen generation function is achieved on the basis that the original air suspension function of the system is protected, and the adverse effects on the available space and the loading capacity of a vehicle are greatly reduced.

The invention relates to a device for producing a sand core of a non-precoated sand shell of a supercharger bearing shell, which comprises a core shooter, is equipment for the casting industry, and comprises a stand column component, a sand shooting component, a mold frame component and a base, the negative pressure structure is arranged on one side of the mold frame component and is intermittently communicated with the interior of the mold frame component; in the negative pressure structure, a toothed plate in a sliding rail is connected with a reset spring, the spring is fixed to a limiting baffle, a push rod in the reset spring is connected with a toothed rod, the toothed rod is connected with a driving gear and other components, an upward lifting block in the toothed plate is matched with a mold slope lifting rod, a barge-back rod is arranged above the sliding rail, and a toothed plate side face air exhaust ratchet gear is connected with a reciprocating lead screw and the like. The exhaust pipe is communicated with the air storage tank which is provided with an electromagnetic valve; the device improves the efficiency and the quality, reduces the cost and the labor intensity, when the mold is closed, the mold drives the component to move upwards to exhaust air so as to reduce flying sand, and after core shooting, the component is reset to clean and recycle molding sand.

The utility model discloses an asphalt adding device for a mixing and kneading process in isostatic pressing graphite production, which comprises an asphalt mixing and pressurizing pipe, an asphalt pump, a gas conveying pipe, a gas control valve, a gas heater, a gas storage tank and a nozzle assembly, the output end of the asphalt pump is fixedly connected with the input end of the asphalt mixing pressurizing pipe in a sealed mode, one end of the gas conveying pipe is fixedly connected with the input end of the asphalt mixing pressurizing pipe in a sealed mode, the other end of the gas conveying pipe is fixedly connected with the gas storage tank in a sealed mode, and the gas control valve and the gas heater are fixedly arranged on the gas conveying pipe in a sealed mode. In the asphalt adding process, by heating gas, the temperature of the asphalt cannot be reduced after the hot gas is in contact with the asphalt, the asphalt and the aggregate are bonded and infiltrated together more easily, the gas pressure can be adjusted when the asphalt is added, and the heating speed and the spraying range of the asphalt can also be adjusted; therefore, the production efficiency and the kneading quality of the kneading pot are greatly improved.

The invention discloses a large-temperature-span accurate cold and heat circulation system and a control method thereof. The system comprises a compressor, a condenser, a gas-liquid separator, a semiconductor refrigerator, a liquid storage tank, a gas storage tank, an ejector, an evaporator and the like. Through cooperative control of a semiconductor cooler, an electromagnetic valve, a gas storage tank, a liquid storage tank and a one-way valve, separation, storage and recombination of a mixed working medium are achieved, and large-temperature-span operation is achieved. The heat pipe heat exchanger is used for transferring cold energy of an evaporator outlet to the gas storage tank, the low-boiling-point working medium liquefaction rate is increased, and the energy utilization rate is increased. The second gas-liquid separator and the third semiconductor cooler are coupled, the proportion of liquid phase components in the second gas-liquid separator is controlled by controlling the current of the semiconductor cooler, the evaporation temperature of the system is accurately adjusted, and accurate temperature control is achieved. By introducing the ejector, irreversible loss of the system can be reduced, suction pressure is improved, and energy consumption is reduced. Large-temperature-span accurate temperature control from high temperature to deep low temperature can be achieved, and the problems that a traditional temperature control system is poor in stability, low in precision, high in energy consumption and the like are solved.

The present invention belongs to the technical field of seepage testing of coal and rock masses, and specifically discloses a coal and rock permeability measurement device and method capable of correcting the deviation of measurement values caused by adsorption. The device includes a constant temperature box, a triaxial gripper arranged in the constant temperature box, a power gas storage tank, an injection gas storage tank, a vacuum pump, a gas pressure controller, a first switch, a vacuum pump, a second switch, a third switch, a fourth switch, a downstream standard container, a fifth switch, an upstream pressure sensor, a downstream pressure sensor, a temperature sensor and a computer; based on Darcy's law and the principle of mass conservation, combined with the permeability measurement work in two stages of pressure increase and pressure decrease, the deviation of permeability measurement caused by the adsorption of injected gas in the coal and rock mass is corrected, and the problem that the traditional permeability measurement method cannot eliminate the large deviation of permeability measurement caused by gas adsorption is solved.

The invention discloses a powder supply device for 3D printing, relates to the field of 3D printing auxiliary equipment, solves the problem that it is difficult to isolate air during the transportation of powder raw materials when using the existing powder supply device for 3D printing, and the raw material powder is easily wrapped by an oxide film, affecting the printing efficiency. The device comprises a shell, a storage hopper, a feeding mechanism, a conveying mechanism and a circulation mechanism. The feeding mechanism comprises an air storage tank, an air tank and a conveying disk. A plurality of conveying cavities are evenly arranged in the conveying disk. The invention controls the conveying disk to rotate and switch the position of the conveying cavity through the feeding mechanism, and extracts the air in the conveying cavity to be fed, injects inert gas, and at the same time extracts the inert gas in the conveying cavity after the feeding is completed into the air storage tank, injects air, and recycles it. The powder at the bottom of the storage hopper is upwardly conveyed to the powder outlet pipe by the conveying mechanism to complete the powder supply operation. At the same time, the water vapor in the powder is fully dried and the powder is preheated during the transportation process.

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 embodiment of the invention provides an air supply system and an air supply method of an air suspension with multiple working modes. Wherein the air supply system comprises an air storage tank, a plurality of air springs, an air supply valve body group, a temperature pressure sensor, a vacuum suction valve pipeline, an air inlet valve pipeline and a negative pressure pipeline. The air supply valve body group is provided with a first ventilation port, a second ventilation port and a plurality of third ventilation ports, the second ventilation port is communicated with the air storage tank, and the plurality of third ventilation ports are communicated with the plurality of air springs in a one-to-one correspondence manner; the vacuum suction valve pipeline comprises a vacuum generator, the air inlet valve pipeline comprises a dryer, a first ventilation port of the air supply valve set is communicated with the outside through the vacuum suction valve pipeline and the air inlet valve pipeline which are arranged in parallel, and the vacuum generator is selectively communicated with the dryer through a negative pressure pipeline. Therefore, the air supply system provided by the embodiment of the invention has the advantages of reducing the regeneration temperature of the drying agent and prolonging the service life of the electric appliance element.

The utility model provides a cryogenic nitrogen-making device which sequentially comprises a self-cleaning filter, an air compressor, an air pre-cooling unit, a molecular sieve adsorber, a booster expansion turbine and a nitrogen rectifying tower according to a liquid nitrogen production sequence, and a liquid nitrogen outlet of the nitrogen rectifying tower is connected with a gas supply and storage tank assembly. The gas supply and storage tank assembly comprises a gas supply main pipeline and gas storage branch pipelines connected in parallel with the lower portion of the gas supply main pipeline. Due to the arrangement of the gas supply main pipeline, the gas storage branch pipeline, the first one-way valve, the second one-way valve, the nitrogen storage tank, the connecting valve, the vaporizer and the third one-way valve, liquid nitrogen can enter and exit for storage, and supply of the liquid nitrogen is guaranteed when nitrogen load is interrupted or air separation equipment is overhauled.

The invention discloses a low-concentration carbon dioxide trapping system and method, and belongs to the technical field of gas separation and trapping. The system comprises an air filter, a zeolite adsorption rotating wheel, a desorption heater, a desorption fan, a centrifugal fan, a pressure swing adsorption module (at least comprising double towers), a vacuum pump, a CO2 storage tank, a rear-end purification and utilization system and a control system. According to the method, trapping is realized through pretreatment, first-stage adsorption concentration, desorption transfer, second-stage purification, collection and storage and circulating operation. The zeolite adsorption rotating wheel is used for adsorbing and concentrating low-concentration CO2, and then the low-concentration CO2 is purified through the pressure swing adsorption module, so that the problems of low low-concentration trapping efficiency and high energy consumption in the prior art are solved. The device has the advantages of high trapping efficiency, low energy consumption, continuous operation, wide application scene and the like, is suitable for trapping low-concentration CO2 in atmosphere and industrial tail gas, and provides an efficient technical scheme for carbon emission reduction.

The invention relates to the technical field of aircraft thunder and lightning tests and protection, and discloses an aircraft thunder and lightning small test pneumatic discharge device which comprises a pneumatic transmission unit, a thunder and lightning waveform discharge unit and a residual charge discharge unit. The pneumatic transmission unit comprises an air compressor, an air inlet valve, an air storage tank, a pressure regulating valve, an electromagnetic valve driving unit, a main path pneumatic pipeline, a control valve I, a control valve II, a pneumatic cylinder I and a pneumatic cylinder II, and the lightning waveform discharge unit comprises a high-voltage discharge switch I, a high-voltage discharge electrode I and a trigger electrode. The residual charge discharging unit comprises a second high-voltage discharging switch, a first discharging resistor and a second discharging resistor, the discharging device of the mobile aircraft lightning test equipment can achieve high-quality discharging of the maximum 200kV and the maximum 200kA, meanwhile, the safety of an aircraft lightning test can be guaranteed, the designed high-voltage discharging electrode is small in size and convenient to install, and the discharging device of the mobile aircraft lightning test equipment is convenient to use. And interference of a strong electromagnetic environment in the square cabin can be avoided by adopting air pressure transmission.

The invention relates to the technical field of unconventional oil and gas well fracturing tools, in particular to an energy-gathered fracturing tool which comprises an outer cylinder, an energy charging pipe, a gas storage tank, a telescopic sealing assembly and a switching assembly, the energy charging pipe is fixedly installed on the inner side of the upper end of the outer cylinder, and the gas storage tank is sleeved with the position, corresponding to the lower portion of the energy charging pipe, of the outer cylinder; a closed air inlet cavity and a closed air storage cavity are formed in the air storage tank in an up-down spaced mode. According to the energy-gathered fracturing tool, repeated energy charging and fracturing can be achieved, the tool does not need to be lifted to a wellhead for energy charging, energy charging of supercritical carbon dioxide can be completed underground, the operation time is saved, the efficiency is improved, the energy-gathered fracturing tool is provided with the telescopic sealing assembly, the space isolation function is achieved, a packer does not need to be put down, and the cost is reduced. The energy-gathering fracturing tool is ingenious in structure, the gas storage cavity can be expanded through transformation, even if underground energy charging cannot be achieved under the well site condition, multiple times of fracturing can be achieved through one-time energy charging, the lifting frequency is reduced, and the cost is effectively reduced.

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.