516 results about "Inlet flow" patented technology

The invention discloses a gas purification real-time monitoring method, system and device and a medium, and belongs to the technical field of gas purification. The method comprises the following steps: a data acquisition stage: acquiring inlet gas flow and outlet component data; in the adsorbent state monitoring stage, the adsorbent state is monitored in real time through the monitoring point position in the adsorption barrel; in the adsorption capacity calculation stage, the residual adsorption capacity is predicted through an impurity penetration curve model on the basis of inlet flow and outlet component data, and bidirectional verification and correction are carried out on the residual adsorption capacity and an internal monitoring state; in the regeneration time prediction stage, the optimal regeneration time is dynamically predicted according to discharged gas component analysis and residual adsorption capacity; in the real-time regulation and control stage, parameters of the purifier and the regenerative heater are adjusted in real time according to the prediction result. Accurate evaluation of the state of the adsorption cylinder and intelligent optimization of the regeneration process are achieved, the utilization rate of the adsorption cylinder is remarkably increased, and the total energy consumption of regeneration is reduced.

An embodiment of a manifold of a hydraulic fracturing system includes a flow cross junction including an inlet flow bore. In addition, the manifold includes a coupling adapter including an external shoulder and a connection device. The connection device is to connect to an output of a pump of the hydraulic fracturing system, and the coupling adapter is removably inserted within the inlet flow bore such that the connection device is positioned outside of the inlet flow bore. Further, the manifold includes a retainer ring connected to the flow cross junction and compressed against the external shoulder.

The invention relates to the technical field of magnetic pumps, and discloses a reverse driving impurity type magnetic pump which comprises a pump chamber, a water inlet, a water outlet and an impurity removal channel are formed outside the pump chamber, an impeller is arranged in the pump chamber, and the impeller is connected with an inner magnetic rotor shaft and is connected with an outer magnetic rotor shaft through a motor to drive rotation. Liquid in the water inlet axially flows into the pump chamber, a suction chamber is arranged in the water inlet and is a conical barrel with the cross section area gradually and uniformly shrunk, an inducer is arranged on the side, facing the water inlet, of the impeller, the inducer and the impeller coaxially rotate, the installation angle of blades of the inducer is small, and flow channels between the blades are long and wide. And the number of the blades is 2-4.

The embodiment of the application provides a gravity self-balancing uniform water distribution system, which comprises first, second and third stage gravity self-balancing water distribution pipelines. Each second stage gravity self-balancing water distribution pipeline is connected to the first stage gravity self-balancing water distribution pipeline, and each third stage gravity self-balancing water distribution pipeline is connected to the second stage gravity self-balancing water distribution pipeline. The circulating water of the cooling tower is automatically depressurized after entering the first stage gravity self-balancing water distribution pipeline, and flows into each second stage gravity self-balancing water distribution pipeline on the basis of the self-weight of the water to realize double uniform water distribution. The water level height of each second stage gravity self-balancing water distribution pipeline is consistent, and the water inlet flows to the third stage gravity self-balancing water distribution pipeline again. The pressure at each water nozzle directly or indirectly connected to the third stage gravity self-balancing water distribution pipeline is consistent, and the water outlet of each water nozzle and the spraying area are substantially the same, so that uniform water distribution is realized, the water inlet is not affected by the water pressure, and the cooling efficiency of the cooling tower is significantly improved.

The invention discloses a fire grate, a combustor and a water heater, and relates to the technical field of water heaters, the fire grate comprises a fire grate body, the fire grate body is provided with a mixing cavity, a first air inlet flow channel and a second air inlet flow channel, the mixing cavity is provided with an air outlet, and the air inlet end of the first air inlet flow channel is provided with an injection opening used for introducing air and fuel gas; the exhaust end of the first air inlet flow channel is communicated with a mixing cavity, the air inlet end of the second air inlet flow channel is provided with an air inlet used for introducing air, the exhaust end of the second air inlet flow channel is communicated with the first air inlet flow channel, and the second air inlet flow channel is used for jetting flow to the first air inlet flow channel. A jet flow angle is formed between the jet flow direction of the second gas inlet flow channel and the gas conveying direction of the first gas inlet flow channel, and the jet flow angle is larger than 45 degrees and not larger than 70 degrees. And the combustion head part is arranged at the air outlet, and the combustion head part is provided with a fire hole communicated with the mixing cavity. According to the technical scheme provided by the invention, emission of carbon monoxide and nitrogen oxide can be reduced.

The invention provides a wide-adjustment high-reliability electric propulsion system and a control method. The wide-adjustment high-reliability electric propulsion system comprises a pressure adjustment module, a flow adjustment module and a Hall thruster. The flow adjusting module is composed of an electromagnetic valve and a flow distributor. According to the Hall thruster flow distributor, through different previous series-parallel connection relations, on the premise that flow distributors are not added, the Hall thrusters can work in pairs, meanwhile, the backup number of the cathode flow distributor and the anode flow distributor is increased, and the system reliability is improved. By arranging the flow resistance step of the flow distributor, the large-range flow adjusting capacity of the cathode and anode inlets of the Hall thruster can be obtained, and therefore the large-range variable thrust working mode, the cathode large-flow ignition mode and the anode low-flow starting mode of the Hall thruster are achieved.

The invention belongs to the field of test fluid mechanics, and discloses a flow correction method considering air inlet distortion and a calibration device. The flow calibration device comprises a standard flow spray pipe, an air inlet section, a measurement section, a rectification section and an exhaust spray pipe which are sequentially connected from front to back. The flow correction method considering the air inlet distortion comprises the steps that distortion air inlet flow correction is conducted; flow and distortion intensity evaluation is carried out; training a neural network; carrying out an air inlet channel test; calculating an air inlet flow distortion parameter; and correcting a flow calculation result. According to the flow correction method and the calibration device considering the air inlet distortion, the air inlet distortion, the total pressure loss and the Reynolds number influence are comprehensively considered, technical support can be provided for high-precision flow monitoring of a large-curvature aircraft air inlet performance evaluation test, and the method and the calibration device have high engineering practical value.

A kind of turbine component transition state test import flow detection method, design utilizes the steady total pressure of turbine import before transition state starts, dynamic total pressure, the steady static pressure of turbine import before transition state starts, dynamic static pressure, and the dynamic total pressure of turbine import at time under transition state, dynamic static pressure, the corrected total pressure of turbine import at time under transition state, corrected static pressure are calculated to obtain, and then the Mach number of turbine import at time under transition state, flow coefficient are calculated, combined with the steady flow of turbine import before transition state starts, the steady flow of turbine import after transition state terminates, the conversion flow coefficient of turbine import before transition state starts, after transition state terminates is calculated, the flow coefficient of turbine import at time is calculated by steady dynamic mapping interpolation, finally the flow of turbine import at time is calculated.

The application provides a test method and device for testing the flow capacity of a drying machine, and relates to the field of drying machine performance testing. The method comprises the following steps: starting the drying machine to be tested, and feeding test medium into the medium flow channel of the drying machine to be tested through a medium inlet; when the test medium is discharged from the outlet of the medium flow channel, the test medium is fed into the medium flow channel at an inlet flow rate, and the inlet flow rate is not less than the maximum inlet flow rate allowed by the drying machine to be tested, which is the design flow rate; when the discharge flow rate of the medium flow channel reaches a stable state, the discharge flow rate of the test medium discharged from the medium outlet is tested; and the discharge flow rate of the test medium is compared with the design flow rate. The device comprises an inlet flow device, an inlet flow rate detection device and a discharge flow rate detection device, the inlet flow device is connected with the inlet flow rate detection device, and the inlet flow rate detection device is in communication with the medium inlet. The device can ensure the production capacity of the drying machine and the normal operation of the production line.

The present application relates to the field of gas turbine technology, specifically to a sand supply device for gas turbine engine sand dust deposition experiment; including box, air intake system, air outlet system, stirring system and dust concentration measuring instrument; air intake system is arranged in the lower part of the box; the air outlet system is arranged in the upper part of the box, and the air outlet system contains height-adjustable air outlet; the input end of the air outlet is provided with an air outlet inlet flow diverter; the stirring system is installed at the bottom of the box, including servo motor, motor support and stirring impeller. According to the target particle concentration, the height of the air outlet inlet flow diverter is adjusted as the main means, and the air inlet flow and speed of the air inlet and the stirring impeller speed are fine-tuned, and through the coupling effect of the three, the high, medium and low concentration levels can be continuously adjusted, covering the engine full working condition sand dust simulation demand, solving the problem of single adjustment mode and insufficient precision of traditional device.

The utility model discloses a shock wave discrete rotary valve, which relates to the technical field of hydraulic valve banks and comprises a valve body, a valve core, a shock wave buffer and a sensor, the valve body is provided with an oil inlet runner, a recovery channel and an oil outlet runner; the valve element comprises a rotating shaft, a rotary disc and a plurality of rotary cups. The rotary disc is fixedly connected to the middle of the rotating shaft, and the multiple rotating cups are connected to the periphery of the rotary disc at equal intervals. The sensor is arranged on the valve body; the axial leads of the oil inlet flow channel and the oil outlet flow channel are collinear and are tangent to the movement track of the center of the revolving cup; a recovery channel is formed in the tangent position in the radial direction of the valve element. A shock wave buffer is arranged at the bottom of the recovery channel. Oil liquid containing shock waves impacts the revolving cup through the oil inlet flow channel, the shock waves rapidly expand in the revolving cup and are splashed out, the oil liquid enters the recovery channel under the centrifugal effect of revolving of the revolving cup, shock wave energy is absorbed by the shock wave buffer, and part of the remaining oil liquid in the revolving cup is thrown into the oil outlet flow channel under the impact rotation and centrifugal effect of the revolving cup. And one part enters the next impact cycle along with the rotation of the revolving cup.

The invention relates to the field of gas turbines, in particular to a gas turbine combustion chamber air flow regulating valve which is arranged between a combustion chamber outer casing and a flame tube and comprises a regulating unit and a communicating unit, and an inner channel of the communicating unit is communicated with an air inlet of the flame tube in a sealed mode. A transmission space pointing to the flame tube from the outer casing side of the combustion chamber is formed, the flux of the transmission space is controlled by the adjusting unit to be adjusted by the communicating unit, the communicating unit comprises a valve flange connected to the flame tube, and the other end of the valve flange is fixedly connected with a valve switching section. The end, away from the valve flange, of the valve switching section is fixedly connected with the air inlet flow channel. The air distribution proportion in the combustion chamber can be actively adjusted according to the working condition change of the gas turbine, different combustion requirements under high and low working conditions are met, and the stable working boundary of the low-emission combustion chamber is effectively widened.

The application provides a heater air inlet and exhaust device for a travel vehicle, and belongs to the field of travel vehicle heater accessories. The device comprises a nested exhaust pipe, an air inlet pipe, a positioning frame and a cover. An annular fixing plate is arranged between the exhaust pipe and the air inlet pipe, a first baffle is arranged in the inner cavity of the exhaust pipe, the first baffle is connected with a second baffle, the inside of the cover is divided into upper and lower areas by means of the above structure, the smoke flow space and the air inlet flow space are distinguished, and smoke backflow is effectively prevented. The side wall of the cover is provided with a louvered second smoke outlet, the bottom end is provided with a second air inlet, the bottom end of the air inlet pipe is provided with a first air inlet, and the two air inlets are communicated to form an air inlet passage. The air inlet pipe and the cover jointly form an annular drainage groove, which can timely drain the water accumulated in the exhaust pipe. The device only needs to be opened at a single position of the vehicle body, has the functions of preventing smoke backflow, preheating air inlet, automatically sucking air inlet by smoke negative pressure, collecting and discharging condensate water, has a compact structure and stable operation, and is suitable for various travel vehicle parking heaters.

The invention relates to the technical field of valves, and discloses a water outlet valve. The water outlet valve comprises a valve body, a bypass valve element and a pressure relief valve element, the valve body comprises a valve main body and a bypass valve part connected to the valve main body, the valve main body is provided with a three-way valve cavity, a heating channel and a first heat exchange water inlet runner, the three-way valve cavity selectively communicates with the heating channel or the first heat exchange water inlet runner, and the first heat exchange water inlet runner is used for being connected with a heat exchange structure; the bypass valve part is provided with a bypass flow channel and a pressure relief channel; the bypass valve element and the pressure relief valve element are movably arranged in the bypass flow channel in a spaced mode, a pressure relief main cavity is formed by the gap between the bypass valve element and the pressure relief valve element, the pressure relief main cavity communicates with the side, close to the first heat exchange water inlet flow channel, of the three-way valve cavity, and the bypass valve element can selectively open a channel between the heating channel and the pressure relief main cavity. The pressure relief valve element can selectively open a channel between the pressure relief main cavity and the pressure relief channel. The water outlet valve integrates the bypass valve and the safety valve, and is small in size and convenient to install.

The embodiment of the invention belongs to the technical field of washing equipment, and particularly relates to washing equipment, electronic equipment and a control method, and the washing equipment comprises a barrel assembly which comprises an outer barrel and an inner barrel; the spraying device is arranged at a barrel opening of the inner barrel, and the spraying direction of the spraying device faces the interior of the inner barrel; the water path system comprises a first water inlet flow path and a water return flow path, the water inlet end of the first water inlet flow path is used for being connected with an external water supply pipeline, the water outlet end of the first water inlet flow path is connected with the spraying device, and the water inlet end and the water outlet end of the water return flow path are connected with the outer barrel and the spraying device respectively. The spraying device can selectively utilize inlet water of the first inlet water flow path and / or return water of the return water flow path to spray the inner barrel; and the control unit is configured to dynamically control the spraying state of the spraying device according to the water inlet stage in the water inlet process of the washing stage. According to the embodiment of the invention, spraying can be carried out while water feeding is carried out, the water feeding time is shortened, the circulating spraying time and the cleaning effect are guaranteed, and water and electricity are saved.

The utility model relates to a kind of ultra-low center high vertical pipeline pump pump body, comprising: elbow water inlet flow passage;Elbow water inlet flow passage includes water inlet section and annular water suction chamber, water inlet section and annular water suction chamber are integrally formed;Annular water suction chamber is provided with baffle and circular vortex;The cross-sectional shape of water inlet section is circular gradually transitioned to rectangular section;The shape of the foremost end and the last end of annular water suction chamber is same with the area of section surface.The utility model provides the overall height of pump is reduced, the appearance of pump is more compact, is more easily integrated into existing pipeline system.Not only can save installation space, reduce the demand for special foundation, but also can reduce building investment cost, also can reduce vibration and noise, improve the service life of pump.

The application discloses a circulating water pump drag-reducing and pressure-increasing device and a motor regulating system thereof, relates to the technical field of fluid machinery and automatic control, and constructs a flow field active control system of sensing, decision-making and execution. A high-frequency pressure sensor array continuously captures pressure pulsation frequency spectrums before and after an inlet flow guide unit. The frequency spectrums are directly mapped with the vortex intensity and flow state instability degree of the impeller inlet. An intelligent decision-making module performs real-time decoupling and analysis on the frequency spectrums, identifies the characteristic frequency and energy intensity of harmful vortexes, synchronously calculates the optimal deflection angle instruction of the flow guide vane, and drives the adjustable flow guide vane to move according to the instruction. An accurate pre-whirl flow with controllable intensity is actively generated in the inlet flow field in the opposite direction of the rotation direction of the impeller, so that the flow lines are greatly smoothed before the fluid enters the impeller, and the fluid can smoothly enter the working area of the impeller at the best attack angle.

The utility model provides a kind of servo valve flow channel and servo valve, including valve core and valve sleeve;The servo valve flow channel includes the passage being set in the valve body inside servo valve, including inlet flow channel, oil return flow channel, first actuating port flow channel, second actuating port flow channel;Two cavities are arranged in the position of the length direction of the two ends of valve body inside close to valve sleeve, the valve body inside is also provided with balance passage, balance passage is used to connect the two cavities inside valve body, oil liquid in one cavity can flow to another cavity by balance passage when valve core is translated in valve sleeve;Utilize such a kind of servo valve flow channel and servo valve, by setting cavity and balance passage as control oil cavity and control channel in the two ends of valve sleeve, the pressure fluctuation when spool moves is reduced to controllable range, to balance two sides oil pressure, reduce rigid impact and valve core resistance.

The invention provides a side pressing shower head, and relates to the technical field of sanitary products, the side pressing shower head comprises a body and a pressing structure arranged on the body, the body is provided with a water inlet runner, a water distribution cavity and a plurality of water outlet runners communicated with the water distribution cavity, a water distribution disc is arranged in the water distribution cavity, and the pressing structure is used for controlling the water distribution disc. Comprising a driving part, a transmission part, a gear part and a button, the driving part is in linkage with the water distribution disc, and the transmission part is provided with a power assisting groove extending in the moving direction of the transmission part; the gear piece is used for abutting against the power assisting groove to form acting force assisting the transmission piece in resetting. The button arranged on the side face of the body is pressed to push the transmission piece to move, so that the driving piece drives the water distribution disc to rotate, and the water outlet flow channel communicated with the water inlet flow channel is switched. When the button is released, the transmission piece moves under the action of the elastic piece and resets under the auxiliary action of the gear piece. The problems that an existing pressing switching structure is prone to being blocked and unsmooth in resetting are solved.

The application discloses a reliable bypass flue gas evaporator automatic spraying control system and method under deep peak regulation of a thermal power generating unit, which comprises an inlet flue, a bypass flue gas evaporator, an outlet flue, a waste water inlet pipeline, a boiler load signal input end, a water inlet flow electric regulating valve control module, a water inlet flow electric regulating valve feedback control module, a water inlet flow electric regulating valve, a control system switcher, a PID A controller and a PID B controller; the inlet flue is communicated with an inlet of the bypass flue gas evaporator, an outlet of the bypass flue gas evaporator is communicated with the outlet flue, a flue gas flow meter is arranged on the inlet flue, an outlet flue gas temperature meter is arranged on the outlet flue, and the outlet of the waste water inlet pipeline is communicated with a waste water inlet of the bypass flue gas evaporator in sequence through the water inlet flow electric regulating valve; the system and the method can realize automatic control of spraying of the bypass flue gas evaporator under deep peak regulation of the thermal power generating unit, and keep stable operation of the system.

The utility model provides a kind of integrated pretreatment module for high-temperature dust-containing flue gas, comprising: the box with flue gas inlet and flue gas outlet, the part of box inside adjacent flue gas inlet is equipped with inlet chamber, and the cross-sectional area of inlet chamber gradually expands along the direction of flue gas flow, the part of box inside adjacent flue gas outlet is equipped with outlet chamber, and the cross-sectional area of outlet chamber gradually reduces along the direction of flue gas flow, and box inside is further equipped with dust removal chamber;Conical ash bucket, it is equipped in the bottom of box, and conical ash bucket is communicated with the bottom of dust removal chamber;Inertia separation baffle assembly, it is equipped in the dust removal chamber in box, and inertia separation baffle assembly includes multiple groups of baffle type baffle, baffle type baffle in each group is arranged along the direction of flue gas flow with interval, each baffle type baffle is inverted V-shaped structure, and each baffle type baffle has outwardly bent dust collection lip at both sides edges of inverted V-shaped structure;Rectification component.The utility model ensures efficient and stable pre-dedusting efficiency, and provides good inlet flow field condition for subsequent equipment.

The invention relates to the technical field of kitchen appliances, and particularly discloses a range hood and a range hood control method.In the range hood, a shell is provided with a smoke collecting cavity, a smoke inlet and a smoke outlet; the draught fan is arranged in the smoke collecting cavity, oil smoke entering a volute of the draught fan from a front air inlet of the draught fan or a rear air inlet of the draught fan flows to the smoke outlet through an air outlet of the draught fan, the smoke collecting cavity is defined by a front panel, a rear panel, an upper panel and a lower panel of the shell, and the left side and the right side of the smoke collecting cavity are each provided with an opening communicated with the outside. The shell further comprises two side panels blocking openings in the left side and the right side of the smoke collecting cavity, at least one of the two side panels can move between the opening position and the closing position, and smoke inlet channels communicated with the smoke collecting cavity are formed in the side panels. The side panel is in a vertical state when located at the closed position, the side panel is in an inclined state when located at the open position, and the smoke inlet channel inclines downwards in the direction away from the smoke collecting cavity; through the arrangement, the oil smoke suction efficiency is improved, and the fan efficiency is guaranteed.

This invention belongs to the technical field of mining machinery and equipment, and particularly relates to a leak-proof mechanism for an external spray device of a combined tunneling machine. During operation, the water outlet sprays water mist, and compressed air is delivered into the amplifier cavity from the air inlet. Due to the Coanda effect, the compressed air delivered from the air inlet flows at high speed along the inner annular wall of the amplifier cavity, forming a negative pressure area in the amplifier through hole. This generates a high-speed airflow that is ejected at high speed along the water outlet direction, delivering the water mist sprayed by the water outlet to a more distant area that needs dust suppression. At the same time, the negative pressure area also causes the dust-laden airflow around the air amplifier to flow towards the dust suppression area, drawing a large amount of dust-laden gas into the cavity to fully contact the mist droplets, achieving secondary dust suppression. This optimizes the atomization effect, improves dust suppression efficiency, and the leak-proof mechanism prevents water droplet leakage.

A method for controlling a flow regulating valve (6) of a filling machine (1) forming composite packages (2) from a multilayer composite packaging material and filling the composite packages with a pourable filling product, wherein a position of the regulating valve controls the flow of the product filling the packages, the method envisages: implementing a flow feedback control, receiving a flow set point (FSP) and an inlet flow measurement (FIN) and generating a feedback control contribution (CFB) indicative of a difference between the inlet flow measurement and the flow set point; implementing a flow feed-forward control, receiving the flow set point (FSP) and generating a feedforward control contribution (CFF) using fluid-dynamic maps, which map an output position of the regulating valve with respect to flow and pressure values of the filling product; generating a virtual pressure (PV) based on the feedback control contribution (CFB) generated at the output of the flow feedback control module, wherein the flow feed-forward control receives the virtual pressure (PV) and generates at its output the feedforward control contribution (CFF) based on the flow set point (FSP) and the virtual pressure (PV) using the fluid-dynamic maps. The feedforward control contribution (CFF) determines a control signal (Sc) for adjusting an operating position of the flow regulating valve (6).

The application discloses a water outlet device, which comprises a water outlet body, a water outlet surface cover, a water outlet cavity provided in the water outlet body, and a water inlet provided in the water outlet cavity; the water outlet surface cover is reversibly installed at the water outlet end of the water outlet cavity; a switching part is movably installed in the water outlet cavity and is provided with a transmission structure between the water outlet surface cover; the switching part has an operation part outside the water outlet cavity, which can be operated to drive the water outlet surface cover to reverse and control the water inlet flow from large to small and then to large again as the water outlet surface cover reverses. The switching part can drive the water outlet surface cover to reverse and can also make the water inlet flow smaller during the reversing process of the water outlet surface cover, thereby avoiding the problem of water splashing. In particular, the reversing operation of the water outlet surface cover and the flow control of the water inlet are both realized by the switching part, so that the user operation is more convenient.

The invention discloses a powder supply fluidization device with a powder fluidization flaring, which comprises a fluidization cover and a storage box, the fluidization cover and the storage box are axially connected front and back, inner cavities of the fluidization cover and the storage box are communicated, the storage box is cylindrical, a piston is arranged in the storage box and divides the storage box into a front cavity and a rear cavity, the rear cavity is a driving cavity, and the front cavity is a powder fuel cavity; the fluidization cover comprises a flaring section, a transition section and a convergence section which are sequentially connected in the axial direction from back to front, and a plurality of air inlet holes are uniformly distributed in each section of the fluidization cover; the periphery of the fluidization cover is coated with a rear sealing head, the rear sealing head is divided into three sections from back to front, and three sections of independent air inlet flow channels are formed between the rear sealing head and the outer wall of the fluidization cover; and the fluidization cover is connected with an air inlet system corresponding to each section of air inlet flow channel. And gas in each flow channel enters the fluidization cavity through the gas inlet holes in the corresponding positions and is combined with the powder fuel entering the fluidization cavity to form gas-solid two-phase flow. According to the fluidization device, the volume of the fluidization cavity is increased, and the powder fluidization conveying efficiency is improved.

The invention discloses a waste gas treatment air inlet machine box with an air volume adjusting device, and relates to the technical field of waste gas treatment. Comprising a box body provided with an air outlet and at least two air inlets, and an air cavity communicated with the air inlets and the air outlet is formed in the box body. An air volume adjusting device is arranged between the air cavity and each air inlet, the device comprises a rotatable rotating shaft and a blade module arranged on the rotating shaft, and the blade module comprises a fixed blade and an inclinable guide blade group. The inclination angle of the guide vanes is controlled through the built-in driving mechanism, the orientation of the whole module is adjusted in combination with the rotating mechanism, and the air inlet flow and the flow speed are accurately adjusted. An air valve assembly controlled by a door opening air cylinder is arranged between the air cavity and the air outlet and used for connecting and disconnecting airflow. The flow sensor at the air outlet feeds back data in real time, and is matched with the control system to enable each air inlet channel to be independently adjusted according to treatment requirements, so that the problem that the waste gas treatment efficiency is reduced due to air inflow fluctuation is effectively solved, and stable and efficient operation of the treatment device is ensured.

The utility model relates to the technical field of fluid mechanical equipment, in particular to an impeller for improving the working condition cavitation erosion performance of a water pump of a pump turbine, which comprises an upper crown and a lower ring which are correspondingly arranged up and down, a plurality of optimized blades are fixedly connected onto the lower ring, and each optimized blade comprises a basic blade layer and an offset blade layer. The basic blade layer and the offset blade layer are connected through an optimized blade layer, and the lower ring and the upper crown are both in a horn shape. By optimizing the offset blade layer structure of the blade, the inlet angle of the blade can be further increased, so that the bending of the blade is reduced, the flow area of the inlet of the blade is increased, and the extrusion of the blade is reduced, thereby improving the cavitation performance of the pump during operation under different flows and ensuring the working performance of the water pump.

The application discloses a control valve, a water treatment device and a control method thereof, and belongs to the technical field of water treatment. The control valve is provided with a first main valve position and a second valve position. When the first piston moves to the first main valve position and the second piston moves to the second valve position, the corresponding channels are opened, so that water from a water inlet flow channel is divided into three paths. The first path flows through a side flow channel, is treated, and then flows into a water outlet flow channel from a middle flow channel to maintain water supply. The second path enters a mixed water inlet from a mixed water flow channel and flows to a salt suction inlet. The third path enters a jet water flow channel from a siphon water flow channel, enters the salt suction inlet through a jet inlet, and the second path and the third path can be combined at the salt suction inlet. The regenerated liquid from the salt suction flow channel flows out of a salt tank to supplement the regenerated liquid. In this way, water can be injected into the salt tank while water treatment is performed, one special water injection valve position is reduced, the flux can reach a maximum value in a short time, and the waiting time for maximum water consumption is reduced.