3615 results about "Mixing chamber" patented technology

The invention discloses a porous ejector, a use method thereof and a fuel cell system, and belongs to the technical field of fuel cells. Comprising a shell, a cavity is formed in the shell, and the cavity comprises a suction cavity, a mixing chamber, a second flow stabilizing chamber and a diffusion section which are sequentially arranged; a nozzle body is mounted in the suction cavity and is used for accelerating and depressurizing the driving fluid and spraying the accelerated and depressurized driving fluid into the suction cavity to form a negative pressure area; an ejection opening is formed in the side wall, corresponding to the suction cavity, of the shell and used for introducing an ejection fluid, and the ejection fluid and the driving fluid subjected to acceleration and pressure reduction are mixed in the mixing chamber; a nozzle assembly is arranged at the end, close to the mixing chamber, of the nozzle body and comprises at least one nozzle, and driving fluid is accelerated through a hole channel of the nozzle. The invention provides a porous ejector, a use method thereof and a fuel cell system, and solves the technical problems of low fuel injection efficiency and insufficient energy utilization of a single-hole ejector used in a traditional hydrogen supply system.

The invention provides a dilution refrigeration system adopting modularized parallel connection, and relates to the technical field of mK-level dilution refrigeration, the dilution refrigeration system comprises a plurality of dilution refrigeration units and a transmission pump set, the plurality of dilution refrigeration units share one transmission pump set, and each dilution refrigeration unit is characterized in that a 3He concentration phase and a 3He dilution phase are stored in a mixing chamber; the evaporation chamber is communicated with a 3He dilution phase and is used for separating 3He steam from the 3He dilution phase; the gas flow adjusting device is connected between the evaporation chambers and the transmission pump set, the transmission pump set extracts at least one part of 3He steam in each evaporation chamber, and the gas flow adjusting device partially receives the 3He steam output from the transmission pump set and at least partially liquefies the 3He steam received from the transmission pump set to form 3He fluid flowing back to the mixing chamber; the multiple gas flow adjusting devices of the multiple dilution refrigeration units adjust the pipe diameters of the respective gas pipelines correspondingly, so that the 3He fluid flowing back to the mixing chambers of the multiple dilution refrigeration units is subjected to the same resistance.

Systems, devices, and methods for beverage preparation in portions. Embodiments of the present disclosure include a beverage system including: a fluid feeder configured to discharge a fluid; an ingredient feeder configured to discharge one or more ingredients; a mixing chamber having a dispensing opening, the mixing chamber configured to receive the fluid and the one or more ingredients; a dispenser configured to control dispensing from the mixing chamber via the dispensing opening; and a controller or control circuit programmed to perform operations including: receiving from a user a selection for a beverage; and producing the beverage automatically in portions. Different portions of the beverage may include different target ingredients.

The utility model provides a pottery clay 3D printing device capable of mixing and conveying raw materials in a fixed proportion, which comprises a rack, a 3D printing device, a 3D printing device and a 3D printing device, wherein the rack comprises an accommodating chamber and a printing chamber which are arranged in an up-down structure; the raw material conveying mechanism comprises a plurality of conveying assemblies arranged above the rack, and the conveying assemblies are used for conveying different raw materials; the mixing and extruding mechanism comprises an extruding assembly which can be transversely and movably arranged in the containing cavity and communicates with the conveying assembly, the extruding assembly comprises a material mixing bin body, a mixing cavity is formed in the material mixing bin body and communicates with the raw material conveying assembly, a stirring assembly is arranged in the mixing cavity, and an extruding head is connected to the lower portion of the material mixing bin body; the printing platform is arranged in the printing cavity in a longitudinal sliding mode and used for bearing 3D printing products, raw materials are directly printed in a printer after being mixed, efficiency can be greatly improved, and the problem that ceramic clay materials are possibly poor in uniformity and stability due to long-term placement or in the transferring process can be solved.

The utility model discloses cooking equipment, which comprises a cooking device, a heating device and a control device, the gas steaming and baking module is connected with the cooking device and used for supplying steam and / or smoke to the cooking cavity, the gas steaming and baking module comprises a combustor, the combustor comprises a body and a gas supply structure, the body defines a combustion cavity, the gas supply structure defines a gas mixing cavity communicated with the combustion cavity, and the gas supply structure is provided with a gas inlet, an air inlet and an outlet; the gas inlet communicates with the gas mixing cavity, the air inlet communicates with the gas mixing cavity, the gas mixing cavity communicates with the combustion cavity through the outlet, and the combustion cavity is suitable for introducing gas in the gas mixing cavity. According to the cooking equipment provided by the embodiment of the utility model, the gas supply structure with the gas mixing cavity is arranged on the combustor, and the gas mixing cavity is communicated with the combustion cavity of the combustor, so that the premixing of the gas and the air can be realized, the sufficient mixing of the gas and the air can be ensured, and the sufficient combustion of the gas can be ensured.

The utility model discloses a novel advanced oxidation device which comprises an outer shell, a gas-liquid mixing chamber, an ultrasonic atomization disc, a gas inlet hole, a water inlet hole, a connecting ozone generator, a UV reaction coil pipe and the like. Through ultrasonic wave catalysis and ultraviolet light catalysis, H2O is excited by O3 and a large amount of. OH with higher oxidability is generated, the mixing degree and turbulent fluctuation intensity of ozone and sewage are improved, the mass transfer coefficient is increased, the mass transfer rate of ozone is increased, and four-section oxidation reaction is carried out in one reactor, so that the ozone oxidation efficiency and effect are greatly improved; and a reinforced oxidation effect is generated on pollutants in the wastewater, so that the pollutants in the wastewater are degraded and removed.

The invention provides a 3He internal circulation device for a dilution refrigerator and the dilution refrigerator, and relates to the technical field of dilution refrigerators. The dilution refrigerator is provided with a mixing chamber and an evaporation chamber, the 3He internal circulation device comprises at least one pair of circulation main bodies and a driving mechanism, the at least one pair of circulation main bodies are arranged between a first-stage cold disc and a second-stage cold disc which are distributed at intervals in the vertical direction, the temperature of the first-stage cold disc is located in a first temperature zone, and the temperature of the second-stage cold disc is located in a second temperature zone; each circulating main body has a first state in which the circulating main body moves downwards to be in contact with the second-stage cold disc, is cooled to a second temperature zone and adsorbs 3He steam from the evaporation chamber, and a second state in which the circulating main body moves upwards to be in contact with the first-stage cold disc, is heated to the first temperature zone and releases the 3He steam to the mixing chamber. The driving mechanism is suitable for driving the two circulating main bodies in each pair to move in the vertical direction so as to be switched between a first state and a second state, and the two circulating main bodies are kept in different states so as to form a 3He steam inner circulating passage.

The invention relates to the technical field of reverse osmosis equipment, and particularly discloses an efficient reverse osmosis device which comprises a reverse osmosis system, a barrel and a metering pump, and a mixing module, a communicating pipe and a liquid taking module are arranged in the barrel; the mixing module comprises a mixing chamber which is arranged in the cylinder body and is communicated with the metering pump, the mixing chamber is provided with a liquid inlet, an impeller is rotationally mounted at the liquid inlet, stirring blades which are in transmission fit with the impeller are further rotationally mounted in the mixing chamber, and the communicating pipe is vertically fixed in the mixing chamber and is communicated with the mixing chamber through the liquid inlet. The scale inhibitor mixing device has the beneficial effects that the fluxes of the liquid inlet channels on the upper liquid suction disc and the lower liquid suction disc are simultaneously adjusted through the adjusting plugs, so that an upper-layer scale inhibitor and a bottom scale inhibitor in a certain proportion are respectively extracted from the upper liquid suction disc and the lower liquid suction disc, and the extracted scale inhibitors enter the mixing chamber from the communicating pipe together to be mixed. After mixing, the concentration can meet the adding standard, and finally pumping into a reverse osmosis system.

The invention relates to a water heater control method and device, a water heater, a computer readable storage medium and a computer program product. The method comprises the steps that the target output power of the combustion system is obtained; determining a target driving signal of the fan assembly according to the target output power; in the process of controlling the fan assembly to operate based on the target driving signal, the current rotating speed of the fan assembly is obtained; and the opening degree of the fuel gas inlet assembly is adjusted according to the current rotating speed, so that the proportion of air entering the mixing cavity through the fan assembly to fuel gas entering the mixing cavity through the fuel gas inlet assembly is within a preset proportion range. By means of the method, the amount of fuel gas entering the mixing cavity can be matched with the amount of air, and then the proportion of the air and the fuel gas in the mixing cavity is kept within the preset proportion range. When the mixed gas in the mixing cavity is supplied to the combustion system, the combustion efficiency of the gas system can be improved, the situations of flame separation, backfire and the like possibly occurring in the combustion process are improved, and the operation safety of the water heater is improved.

The invention belongs to the technical field of heat exchangers, powder metallurgy sintering technology application, ultra-low temperature technology, ultra-low temperature equipment and the like, and discloses a plum blossom type silver powder sintering heat exchange sheet and a mixing chamber. The plum blossom type silver powder sintering heat exchange piece comprises a supporting framework and a silver powder sintering block, a threaded hole and a plurality of through holes surrounding the threaded hole are formed in the supporting framework, and the threaded hole is used for being matched with an installation column of the mixing chamber. The silver powder sintered blocks are formed on the two oppositely-arranged faces of the supporting framework through sintering, and the silver powder sintered blocks are provided with connecting parts filled in the through holes. According to the plum blossom type silver powder sintered heat exchange piece, the concentrated-phase or dilute-phase heliumtrihelium tetra mixed liquid and the large surface area of the silver powder sintered block have the sufficient contact condition, the heat exchange effect and the heat exchange efficiency are improved, and the plum blossom type silver powder sintered heat exchange piece is compact in structure and quite suitable for a mixing chamber of a small-refrigerating-capacity dilution refrigerating machine.

The utility model relates to the field of gas-liquid mixing, and provides a bubble generator and an ozone aerator, the bubble generator comprises an inlet connecting end, an outlet connecting end and a throttler assembly, an inlet of the throttler assembly is detachably connected with the inlet connecting end, an outlet of the throttler assembly is detachably connected with the outlet connecting end, and the inlet connecting end is connected with the outlet connecting end. The throttler assembly comprises at least two sets of throttling holes and mixing chambers, and the throttling holes and the mixing chambers are alternately arranged in the direction from the inlet connecting end to the outlet connecting end. And the inner diameter of the throttling hole is continuously reduced. The utility model relates to a flow restrictor assembly, which is used for solving the defect of low inflation efficiency in the prior art, a gas-liquid mixed flow enters the flow restrictor assembly with a plurality of groups of throttling holes and a mixing chamber through an inlet connecting end, and the inner diameters of the plurality of groups of throttling holes are sequentially reduced to carry out multiple times of pressurization, gas dissolving, pressure reduction and gas release to obtain bubbles with smaller diameters, such as nano-scale bubbles. By arranging different groups of throttling holes and mixing chambers, the diameter of generated bubbles is adjusted, the adding efficiency of ozone and other gases is improved, and energy consumption is reduced.

The present invention relates to the technical field of egg tart liquid mixing, specifically to an egg tart liquid preparation apparatus and preparation method, the apparatus comprising a mixing chamber, a tray, a conveying frame, a filling plate, and a stirring rod. Raw materials used for manufacturing egg tart liquid are mostly viscous in nature, and the degree of mixing of each material in the egg tart liquid affects a final baking color and texture of an egg tart. During the process of mixing and processing egg tart liquid, existing mixing devices often focus on the stirring and mixing process of the egg tart liquid, and coordination and control of filling and draining processes of the egg tart liquid are difficult to perform. In a family-style workshop environment, a worker needs to quantitatively take out stirred egg tart liquid and transfer the egg tart liquid into an aluminum foil cup. During a batch egg tart baking operation, the amount of redundancy in work is undoubtedly increased, and the overall manufacturing efficiency of egg tarts is reduced. In addition, the amount of egg tart liquid used and the placement effect of the egg tart liquid in an aluminum foil cup are difficult to control, reducing the overall attractiveness and shaping effects of baked egg tarts.

The invention relates to a boiler gas mixing and blowing device which comprises a blower, a blowing pipe, a filter screen, a gas delivery pipe, a mixing chamber and a combustion chamber which are connected in sequence. An outlet of the fuel gas supply pipe is connected with the gas conveying pipe; a brush further abuts against the filter screen; the filter screen rotates through the motor under the action of the transmission assembly, so that the position, connected with the air conveying pipe and the air supply pipe, of the filter screen is changed, and the filter screen moves relative to the brush. An axially-arranged moving plate is installed in the gas conveying pipe, one side of the moving plate vertically extends out of an adjusting plate, the adjusting plate is arranged at an outlet of the fuel gas conveying pipe, and the communicating area of the fuel gas conveying pipe and the gas conveying pipe is adjusted through movement of the adjusting plate; when the output air pressure of the air feeder is increased, the farther the moving distance of the adjusting plate is, the larger the communication area of the fuel air feeding pipe and the air conveying pipe is, and the larger the flow of fuel gas entering the air conveying pipe is. Therefore, the flow of the fuel gas is automatically adjusted along with the flow change of the air flow.

The invention belongs to the technical field of turbine engine design, and particularly relates to a turbine interstage combustion chamber supersonic cruise engine and a control method thereof.The turbine interstage combustion chamber supersonic cruise engine comprises a fan adopting a FLADE fan; the gas compressor is arranged behind the fan; the main combustion chamber is arranged behind the gas compressor; the high-pressure turbine is arranged behind the main combustion chamber and is connected with the gas compressor through a high-pressure shaft; the mixing chamber is arranged behind the high-pressure turbine and is communicated with the fan through an outer duct; the interstage combustion chamber is arranged behind the mixing chamber; the low-pressure turbine is arranged behind the combustion chamber and is connected with the fan through a low-pressure shaft; the spraying pipe is arranged on the low-pressure turbine; and after the injection valve is arranged on the high-pressure turbine, the injection valve deflects to the inner runner surface of the outer duct when the injection valve is opened, and deflects to the outer runner surface of the outer duct when the injection valve is closed.

A three-dimensional (3D) object production process comprising providing a thermoset printing apparatus comprising a mixing chamber to receive and mix at least a first reactive component and a second reactive component to provide a thermosetting material, an extrusion nozzle to deliver the thermosetting material to form a 3D object, at least one actuator coupled to the extrusion nozzle to move the extrusion nozzle when delivering the thermosetting material to form the 3D object, and a controller comprising one or more processors and coupled to the extruded thermoset printing apparatus, and depositing the thermosetting material to form the 3D object, wherein the depositing comprises depositing a first layer of thermosetting material and depositing an at least second layer of thermosetting material, wherein the beads of thermosetting material in the at least second layer are offset from the beads of thermosetting material in the first layer.

The utility model discloses a novel tetrahydrothiophene concentration measuring device, which relates to the technical field of tetrahydrothiophene detection and comprises a natural gas pipeline, the rear side of the natural gas pipeline is fixedly connected with an L-shaped pipeline I, and the rear end of an L-shaped pipeline III is fixedly connected with a gas mixing chamber. The rear side of the natural gas pipeline is respectively provided with a gas mixing chamber unit, a compressed air preparation unit, a natural gas decompression preparation unit, a sample gas detection unit, a control unit and a communication unit. Air and natural gas are mixed in equal volume, an aerobic detection environment is created, and the working principle of an electrochemical tetrahydrothiophene detector is matched; according to the electrochemical tetrahydrothiophene concentration detector, the tetrahydrothiophene concentration of the mixed gas is accurately detected, then the tetrahydrothiophene concentration of the natural gas is deduced according to the isovolumetric proportional relation, reliable working conditions are created for the electrochemical tetrahydrothiophene concentration detector, continuous measurement can be achieved, detection data are stable, repeatability is good, and precision is high.

The invention provides a gas flow adjusting device and a dilution refrigerator, and relates to the technical field of dilution refrigerators. The gas pipeline is configured to be coiled on the outer side of the supporting body in the height direction of the supporting body, and the gas pipeline is used for conveying 3He steam from the outside; and the extrusion assembly is arranged on the outer side of the gas pipeline, and the extrusion assembly is configured to extrude the gas pipeline in the width direction of the supporting body under the condition that the extrusion assembly is driven by external force so as to reduce the pipe diameter of the gas pipeline, so that the 3He steam forms 3He fluid flowing back to a mixing chamber of the dilution refrigerator after being at least partially liquefied.

The invention relates to the technical field of preparation and purification of phenolic resin, and discloses a phenolic resin impurity separation device for production, which comprises a filter chamber, an inner cylinder is fixedly mounted in the filter chamber, a steam clamping cavity is arranged between the inner wall of the filter chamber and the outer wall of the inner cylinder, and a mixing chamber is fixedly mounted on the upper side in the inner cylinder. A centrifugal cylinder is movably installed on the lower side of the interior of the inner cylinder, a filter screen is fixedly installed at the bottom end of the mixing chamber, a three-phase asynchronous motor is fixedly installed in the middle of the top end of the filter chamber, and the driving end of the three-phase asynchronous motor extends into the filter chamber and is fixedly provided with a movable shaft; and a spiral paddle is fixedly mounted on the outer diameter section, positioned in the mixing chamber, of the movable shaft. According to the invention, the period is shortened through temperature control, energy conservation and enhanced mixing, the purity is improved through multi-stage separation, the labor is reduced through automatic operation, the structure is exquisite, the adaptability is wide, and the phenolic resin impurity separation efficiency and quality are comprehensively improved.

The utility model discloses an environment-friendly municipal sludge drying system, belongs to the field of sludge treatment processes, and is suitable for drying treatment of municipal sludge. The drying system comprises a hot blast stove, a heat exchanger, a condenser, a collector, a dryer and a waste gas treatment device, and can further comprise a high-temperature mixing chamber; the dryer adopts a gas drying mode, a material inlet of the dryer is connected with treated moisture-containing sludge, a gas source inlet is connected with high-temperature drying air, and the moisture-containing sludge is dried by the high-temperature drying air; a material inlet of the collector is connected with a dried material outlet of the dryer, a dried finished product is collected, and low-temperature moisture-containing air is discharged; the condenser condenses the low-temperature moisture-containing air to obtain condensed water and low-temperature dry air; the heat exchanger receives high-temperature hot air and low-temperature dry air to exchange heat in the heat exchanger to obtain waste gas and high-temperature dry air; and the hot blast stove supplies high-temperature hot air to the heat exchanger by introducing cold air and heating. The sludge drying system has the remarkable advantages of high drying efficiency, stable and safe operation, energy conservation, environmental protection, cost saving and the like.

A system performs non-destructive measurements of density gradients to automatically replicate and distribute density gradients. The system obtains measurements at points along the length of the density gradient and generates a distribution of the density gradient based on the measurements. The system uses the distribution to replicate a density gradient of the component in the second container. The system inserts the distal end of the probe into a second container and pumps each individual component into a manifold and a mixing chamber connected to the proximal end of the probe to automatically dispense a density gradient in the second container.

The invention belongs to the technical field of flame-retardant coating preparation, and discloses a flame-retardant coating preparation device and a preparation method thereof.The flame-retardant coating preparation device comprises a reaction cylinder, a water inlet, a first discharging pipe and a mixing mechanism arranged in the reaction cylinder and further comprises a discharging assembly installed at the top of a cavity of the reaction cylinder; the discharging assembly comprises a discharging opening fixedly formed in the top of the reaction cylinder and a funnel, and the funnel is rotationally provided with a conveying roller. According to the scheme, a mixture of water and a solvent is injected into the reaction cylinder through the water inlet, meanwhile, the turbine and the mixing blades rotate through rotation of the motor, and the turbine rotates to convey a mixed solution in the reaction cylinder to the top of the mixing cavity through the main pipeline; and meanwhile, the powder raw materials and the mixed solution in the mixing cavity can be stirred and mixed at a high speed through rotation of the mixing blades, the mixed coating can be discharged through a second discharging pipe, operation is completed, and the situation that the powder coating is accumulated and agglomerated is avoided.

The embodiment of the invention discloses an ultrahigh compression ratio adjustable ejector and a variable working condition performance optimization design method thereof. The adjustable ejector comprises a nozzle, an adjusting cone, a suction chamber, a mixing chamber and a diffusion chamber, wherein working fluid is introduced into the nozzle, the adjusting cone is arranged at the throat part of the nozzle, and the fluid to be ejected is introduced into the suction chamber; the adjusting cone is formed by alternately and repeatedly connecting cylindrical surface sections and conical surface sections, and the adjusting cone can axially move; the method comprises the steps that the pressure of working fluid input into the adjustable ejector is monitored; when the pressure of the working fluid is changed between the first pressure and the second pressure, the adjusting cone is axially moved, and each cylindrical surface section directly faces the throat part in sequence, so that step type adjustment of the pressure of the working fluid is realized; when the pressure of the working fluid is changed between the second pressure and the fourth pressure, the adjusting cone is axially moved, and each conical surface section directly faces the throat part in sequence, so that the continuous adjustment of the pressure of the working fluid is realized; the mass flow of the ejected fluid in the adjustable ejector belongs to a preset range; the first pressure, the second pressure, the third pressure and the fourth pressure are gradually increased in sequence.

The invention relates to the technical field of bypass ventilation denitration systems, and discloses an intelligent bypass ventilation SCR (Selective Catalytic Reduction) coupling SNCR (Selective Non-Catalytic Reduction) denitration system which comprises a smoke chamber, a cyclone cylinder, a precise ammonia spraying system, an air mixing chamber, a cooling fan, a cold air valve, a dust collection chamber, an SCR reactor, an exhaust fan, a chimney, a stock bin, a bin pump, a compressed air system and an intelligent control system, the air inlet is connected with the smoke chamber, and the feed opening is connected with the bin pump. Under any working condition, NOx emission at a chimney outlet can reach the standard, the ammonia water consumption is lowest, the denitration effect is good, the investment cost is low, the problem that NOx emission of the kiln tail chimney is unstable and prone to exceeding the standard is solved, the catalyst abrasion and blocking risk can be greatly reduced, the catalyst dosage is small, the maintenance cost is low, and the method is suitable for industrial production. And long-term stable operation of the system is realized.

An extruder for an additive manufacturing machine has a first and second extrusion duct (6, 7) separated from each other; a first and a second feeding system (8, 9), configured to feed a first and a second material into the first and the second extrusion duct (6, 7); a first and a second heating assembly (10, 11) configured to heat the first and the second material so as to determine the melting of the first and the second material; a mixing chamber (12), which is configured to allow the mixing of the first and of the second melt material exiting from the first and from the second extrusion duct (6, 7); and a control unit (14), configured to independently control the first and the second feeding system (8, 9) and the first and the second heating assembly (10, 11).

The invention provides a textile sizing agent heat preservation mixing device, and relates to the technical field of textile sizing agent treatment. The device comprises a supporting base, a mixing bin, a driving motor, a main shaft transmission mechanism, a rotating seat, a bevel gear train, an electromagnetic suction seat and a constant-temperature liquid storage bottle, wherein the driving motor drives the rotating seat to horizontally rotate in the mixing bin through a synchronous belt; a transmission bevel gear on the rotating seat is meshed with a fixed driving gear to generate autorotation and drives a driven bevel gear, so that the liquid storage bottle realizes revolution and autorotation at the same time to form a three-dimensional spiral stirring track, and a heating cup seat is arranged at the bottom of the liquid storage bottle and is matched with a double-layer heat preservation mixing bin to realize constant-temperature maintenance of slurry; and the electromagnetic suction seat realizes tool-free quick disassembly through the cross-shaped limiting groove and the limiting block. The problems that in the prior art, stirring is uneven, energy consumption is high, and maintenance is inconvenient are effectively solved, and the slurry uniformity and the sizing efficiency can be remarkably improved.

A mixing valve including a body having first and second inlets, an outlet, and a mixing chamber. A first valve seat is located between the first inlet and the mixing chamber, and a second valve seat is located between the second inlet and the mixing chamber. A shuttle is moveable in the mixing chamber between the first and second valve seats and includes a first plug facing the first valve seat and a second plug facing the second valve seat. The plugs have trim surfaces that are one of, or a combination of, a fast-opening shape, a linear shape, and an equal percentage shape.

The invention belongs to the technical field of electric heating, and particularly relates to a waste heat utilization ejector coupled with a plasma generator, the waste heat utilization ejector comprises the plasma generator, a nozzle and a Laval pipe structure, the rear end of the nozzle is provided with a working fluid inlet, and the Laval pipe structure sequentially comprises a receiving chamber, a mixing chamber, a throat pipe structure and a diffuser from back to front. A front end opening of the diffuser is a mixed fluid outlet, the nozzle is located in the receiving chamber, an anode structure of the plasma generator penetrates through the rear end of the receiving chamber and is communicated with an inner cavity of the nozzle through a working fluid inlet, a driving fluid inlet is formed in the side face of the receiving chamber, and a front end opening of the nozzle faces the throat pipe structure. The diffuser is conical, and the size of the mixed fluid outlet is larger than that of the rear end inlet of the diffuser. According to the invention, the waste heat utilization efficiency can be improved while the heating area of the plasma is obviously increased.

The utility model provides a fluid flow measuring system of an ultrasonic flow meter, which at least comprises an ultrasonic flow meter with four or more sound channels, an embedded rectifier embedded in a fluid inlet of the ultrasonic flow meter, front-end straight pipe sections which are arranged at the front ends of the ultrasonic flow meter and the embedded rectifier and are not less than 5D in length, and the inner diameters of the front-end straight pipe sections and the front-end straight pipe sections are the same and are D; the embedded rectifier sequentially comprises a spiral flow generator, a straight pipe mixing cavity and a flow straightener in the flow direction of fluid. The space intersection angle O of the upper and lower end faces of the blades of the spiral flow generator and the intersection angle P of the blades and the outer wall of the inner rectification cylinder and the inner wall of the outer rectification cylinder are changed; meanwhile, the side length U and the wall thickness K of a regular hexagon rectification hole of the flow straightener are changed, it is verified that the embedded rectifier measures fluid through combination of a large amount of analog simulation data and single actual measurement verification experiment data, and the four-channel ultrasonic flowmeter can meet the fluid measurement precision of 1% under different turbulent flow conditions.

The invention belongs to the field of micro-fluidic chips, and particularly relates to a micro-mixing channel for preparing nano-pesticide and a micro-fluidic chip. The micro-mixing channel comprises at least two feed ports, at least two inlet channels communicated with the feed ports, an inlet communication channel communicated with the other ends, far away from the feed ports, of all the inlet channels, at least two micro-mixing units communicated with the inlet communication channel, and an outlet communication channel communicated with the last micro-mixing unit, the discharge hole is communicated with the outlet communication channel; the micro-mixing unit is a contraction-expansion mixing chamber internally provided with a date-pit-shaped baffle, and the contraction-expansion mixing chamber comprises an inlet of the contraction-expansion mixing chamber, a middle structure internally provided with the date-pit-shaped baffle and an outlet of the contraction-expansion mixing chamber; and the previous micro-mixing unit is communicated with the inlet of the contraction-expansion mixing chamber of the next micro-mixing unit through the outlet of the contraction-expansion mixing chamber. The micro-mixing channel and the micro-fluidic chip can be used for preparing nano pesticides, and are simple in structure, convenient to process and wide in application range.

The utility model relates to the technical field of polyurethane spraying devices, in particular to a polyurethane spraying gun which comprises a gun body, a movable cavity is arranged in the gun body, and a material inlet gun body channel and a cleaning fluid inlet movable cavity channel are arranged on the side portion of the gun body. A mixing chamber is arranged in the movable cavity, and the front and rear ends of the mixing chamber are slidably connected with the movable cavity through sliding sealing pieces; a fluid inlet mixing cavity channel is formed in the side part of the mixing chamber, and a material spray head is arranged at the front part of the mixing chamber; the cleaning fluid inlet movable cavity channel is connected with a cleaning fluid pipe; the cleaning fluid pipe is connected with a liquid inlet pipe and an air inlet pipe; a good cleaning effect can be guaranteed, and residual materials are prevented from being attached to the gun head; and the residual cleaning liquid and the spraying raw materials are prevented from chemical reaction, and the use effect of the spraying raw materials is prevented from being influenced.