148results about How to "Adjust output" patented technology

Disclosed are a rice growth regulator, a preparation method and a usage method thereof. The preparation method of the rice growth regulator includes using main raw materials of, by mass, 0.002%-0.0025% of abscisic acid, 0.5%-2% of urea, 0.1%-0.5% of boric acid and 0.2%-0.5% of monopotassium phosphate, dissolving the abscisic acid by means of ethanol, and evenly mixing the abscisic acid with other raw material aqueous solutions. Foliar spraying is performed at the middle and late stage of the growth of rice, so that stem-sheath assimilative matter translocation and grain filling of the rice are promoted, the setting percentage is increased, rice qualities are improved, and yields are increased; and besides, draught resistance and stress resistance abilities of the rice can be improved. The rice growth regulator, the preparation method and the usage method thereof are safe and environment-friendly, simple in preparation, low in cost, obvious in effect and easy to popularize.

The invention discloses a microgrid virtual synchronous generator model prediction control method and a system. The microgrid virtual synchronous generator model prediction control system comprises a virtual synchronous generator and a frequency modulation unit, wherein the virtual synchronous generator mainly has a main circuit and a control system; the main circuit is grid-connected inverter topology and has a renewable energy generation device, a DC / AC converter, an inverter and a filter circuit; the control system is a core for the virtual synchronous generator and comprises a virtual synchronous generator body model and control algorithm; with simulation of mechanical features and electromagnetic features of the virtual synchronous generator, the inverter can have features similar to the synchronous generator; the frequency modulation device is an energy storing device and can absorb or release energy in real time; the energy storage device is accessed to the virtual synchronous generator; and when required power has to be supplemented upon imbalance of the system power, frequency fluctuation can be weakened and system transient power conservation can be guaranteed. System frequency changes can be confined to a safety range by the system, and economic property of the virtual synchronous generator output can be considered at the same time.

The invention discloses an online heating distortion correcting device for a profile, comprising a straightening cylinder; the straightening cylinder is connected with a tension control system, a main hydraulic pump station and a cooling system; one side of the strengthening cylinder is provided with a stretching head device, and one side of the stretching head device is provided with a twisting head device; the twisting head device is connected with an auxiliary hydraulic pump station; the stretching head device and the twisting head device are provided with same temperature measuring systems; a negative water cooled cable of the stretching head device is connected with a heating power supply, and a positive water cooled cable of the twisting head device is connected with the heating power supply through a conducting busbar; two ends of the profile are directly and electrically heated, distortion correction begins after two ends of the profile are heated to the set temperature, and the profile is rapidly and efficiently heated through the closed loop control of an infrared temperature measurement and temperature control system to the power supply; due to the control for the tension of a hydraulic system, the constant output of a stretching force is ensured, and stretching by using a constant stretching force is realized; and the twisting angle is precisely controlled, the problem that the online heating insulation distortion correction of the profile is difficult in the distortion process is solved, the degree of automation is high, the distortion correcting quality is improved, and the distortion correcting efficiency is increased.

The invention relates to a mortar vehicle for concrete and asphalt, comprising a bottom disc and upper components arranged on the bottom disc; the upper components comprise an assembly for weighing and charging dry powder, an assembly for measuring and charging asphalt, an assembly for measuring and charging water, an assembly for measuring and charging additives, an assembly for measuring and charging P emulsion, an assembly for a stirring main machine, an assembly for a mortar grouting plate, a power system and a control system; the two sides of a dry powder delivery screw machine in the assembly for weighing and charging dry powder are provided with a first asphalt storing tank and a second asphalt storing tank; the two sides below a dry powder storage bin are respectively provided with a third asphalt storing tank and a P emulsion storing tank in the assembly for measuring and charging P emulsion; three asphalt storing tanks are communicated to form an asphalt storing tank in the assembly for measuring and charging asphalt; and a water tank and a water pump in the assembly for measuring and charging water and an air reservoir in the power system are fixed on the bottom disc below the upper components. The mortar vehicle has the advantages of compact structure, ingenious layout, accurate measurement and wide application range and the like, can produce mortar with high modulus of elasticity and also can produce mortar with low modulus of elasticity.

The invention discloses an electrostatic spinning device. The device comprises a driving device, a liquid inlet coupling, a liquid passing shaft, a solution tank, a rotating head, a plurality of spinning ports, an air pump, a collector, an induction rope and a high-voltage power source. The electrostatic spinning device has the advantages that the solution tank is inflated through the air pump, aspinning solution is pressed to the spinning ports by using a pressure difference, so that the solution tank accurately provides the spinning ports with the spinning solution at the same time; the induction rope has the functions of dissipating the spinning solution, inducing the spinning solution to be sprayed and effectively reducing the starting voltage when swinging along with the rotating head; when the spinning ports rotate, the spinning solution is swung into a high-voltage electric field under the action of centrifugal force to generate a jet flow, and the forming amount of the jet flow and the yield and quality of a fiber can be further adjusted and controlled by adjusting the output value of the high-voltage power source, the distance between the collector and the spinning ports,the solubility of the spinning solution, the pressure of the air pump and other electrospinning process parameters.

The invention discloses a combined magnetic separation process for selecting weathering sand ilmenite. A titanium ore concentrate with the grade content of 46-52% and an iron ore concentrate with the grade content of 40-65% are obtained by the steps of pulping, screening and waste discarding, strong magnetic tailing discarding, screening, fine ore collecting, coarse grain regrinding, one-selection and two-scavenging and drying and selection. The process can realize relatively independent production of crude ores, middling and concentrates, can adjust the yields and the grades of a titanium middling and a titanium concentrate, and can separate out refined titanium and refined iron.

The invention discloses a method for strengthening the flow conductivity of a hydraulic fracture of a soft coal bed. The method includes the following steps that (1) a microbiological culture solution obtained through enrichment culture is injected into a target reservoir stratum via a pressure fracture hole, then a fixing solution is injected into the target reservoir stratum, and a jelling solution is injected intermittently, specifically, the step of intermittently injecting the jelling solution at least comprises one time of the jelling solution injection process and the intermittent process every time after the jelling solution is injected, and microorganisms are Pasteur sporogenes sarcina; and (2) after intermittent injection of the jelling solution is completed, subsequent production is organized according to the downhole hydraulic fracture procedure. By injecting the microorganisms and nutrient substances into the target reservoir stratum and providing full activation, survive and reproduction conditions, calcium carbonate crystals with the jelly property are generated on the hydraulic fracture plane and surrounding coal through the enzyme digestion function of the microorganisms, and accordingly the mechanical strength and the seepage capability of the hydraulic fracture on a gas reservoir of the soft coal bed are improved.

The invention provides a low-speed and high-torque motor with a magnetic gear. The low-speed and high-torque motor comprises an inner rotor, an adjustable magnetic ring and a stator which are coaxially and sequentially arranged from inside to outside, wherein a permanent magnet is arranged in the inner rotor; an armature winding for generating a rotating magnetic field and an electromagnet for generating a constant magnetic field are arranged in the stator. By adopting the electromagnet to generate the constant magnetic field in the stator and to replace a permanent magnet in the stator, the usage of the permanent magnet can be reduced, so that the length of an air gap on an outer layer is reduced, and further the coupling degree of an armature winding magnetic field and a permanent magnet magnetic field of the inner rotor is improved.

The invention relates to an intelligent husked rice separation machine. The intelligent husked rice separation machine comprises a base, a vibrating screening mechanism, a vibrating mechanism, a material feeding device, an angle adjusting mechanism and a central processing unit; the vibrating screening mechanism is disposed on the base, a material inlet is formed in the upper end of the vibratingscreening mechanism, a material outlet is formed in the lower end of the vibrating screening mechanism, and the material feeding device communicates with the material inlet; the vibrating mechanism isfixed to the base and is in transmission connection with the vibrating screening mechanism; a plurality of layers of screening plates which are disposed at intervals up and down are disposed in the vibrating screening mechanism; one sides of the screening plates are inclined downwards towards the vibrating mechanism; a camera is disposed in the position, above the screening plate of the uppermostlayer, in the vibrating screening mechanism; the angle adjusting mechanism is connected with the vibrating screening mechanism and used for adjusting the inclined screening angle of the vibrating screening mechanism and the screening plates; and the central processing unit is electrically connected with the camera, the angle adjusting mechanism and the vibrating mechanism. The intelligent huskedrice separation machine has the advantages that the screening effect can be adjusted flexibly and intelligently, adjustment is accurate, the material output quantity is improved, the production efficiency is high, and the yield is high.

The invention provides a wind power generation and power supply system based on grid power complementation. The system is characterized by comprising four parts, wherein the first part comprises four paths for supplying power to an AC load; the second part comprises four paths for supplying power to a DC load; the third part comprises two paths for supplying power to a device power supply bus in a 220V system; and the fourth part comprises a voltage, current, electric quantity, phase position, wind speed, temperature and humidity detection circuit, a system display unit and a remote transmission module. The system provided by the invention organically integrates electric energy output by a fan and electric energy output by a power grid, is used for supplying ceaseless three-phase AC power and high-voltage DC power to various loads and has a man-machine interaction function and a data remote-transmission function.

The invention relates to an adjustable quantitative injection pump. A speed reduction motor is arranged on a pump body. A rotating block is fixed on an output shaft of the speed reduction motor. An adjusting screw rod vertical to the output shaft of the speed reduction motor is arranged on the rotating block. A sliding block drive pin is arranged on the adjusting screw rod. The axis of the sliding block drive pin is deviated from the axis of the output shaft of the speed reduction motor. The sliding block drive pin is matched in a transverse groove of a sliding block in a sliding mode. The sliding block is matched on a vertical sliding block guide rod in a sliding mode. A vertical drive rod is fixed on the sliding block. The drive rod is connected with a push rod of a syringe through a linkage block. According to the invention, a transmission mechanism of the syringe is formed by the speed reduction motor, the rotating block, the sliding block drive pin, the sliding block and the drive rod and drives the push rod of the syringe to take the piston motion, wherein the sliding block drive pin is arranged on the adjusting screw rod and the eccentricity of the sliding block drive pin relative to the output shaft of the speed reduction motor can be regulated, so that the output of the syringe is regulated. The adjustable quantitative injection pump has simple structure and low cost, is stably and reliable to operate and is simple and convenient to control.

The invention relates to the technical field of agricultural equipment, and discloses a crop fertilizing device capable of adjusting the discharge amount by controlling the opening and closing frequency. The crop fertilizing device comprises a first gear. A clamping rod is movably connected to the outer side of the first gear. The first gear rotates to enable a second cone pulley to rotate intermittently by 180 degrees, and the clamping rod moves upwards to enable the first gear to be meshed with a second rotating plate. The rotating frequency of the second cone pulley is reduced as the sizesof a first rotating plate and the second rotating plate are different, and subsequent control of the fertilizer discharge amount is benefited, so that the discharge amount is regulated, and linkage between structures is improved. A fifth rotating plate rotates, a long shaft of the fifth rotating plate is close to a left protruded column of a moving rod, the fifth rotating plate pushes the moving rod to move leftwards, a stop plate is enabled to be away from a discharge outlet, the left protruded column, away from the moving rod, of the long shaft of the fifth rotating plate is close to a rightprotruded column of the fifth rotating plate, the moving rod is driven to move rightwards, and the stop plate moves rightwards and upwards to be close to the discharge outlet. The position of the stop plate is controlled to control discharge conditions, automatic discharge is achieved, and the crop fertilizing device is convenient and rapid to operate.

The invention provides a material mixing and plastering method for ceramic tiles. A machine frame, a stirring device, a material distribution device and a ceramic tile positioning and conveying deviceare included. The material mixing and plastering method for the ceramic tiles includes the following steps that raw materials are added in the stirring device, and then the stirring device is startedto stir the raw materials to form an ash material; in the raw material stirring process, the ceramic tiles to be subjected to plastering are placed on the ceramic tile positioning and conveying device and are positioned, and the material distribution device is lowered to the upper surfaces of the end portions of the ceramic tiles; a discharge port of a stirring hopper device is opened after stirring is completed and the stirring device is stopped, the ash material subjected to stirring forming is fed into the material distribution device, and the discharge port of the stirring hopper device is closed after the material distribution device is full filled with the ash material; the material distribution device is lifted, the ceramic tile positioning and conveying device is started at the same time so that the ceramic tiles can move on the ceramic tile positioning and conveying device, the ash material falls onto the ceramic tiles along with movement of the ceramic tiles, and the ash material is smoothed through the bottom of the material distribution device; and the multiple ceramic tiles sequentially move on the ceramic tile positioning and conveying device to be subjected to plastering till the ash material in the material distribution device is used up.

The invention provides equipment for laying curing agent flooring materials. The equipment for laying the curing agent flooring materials comprises an equipment frame, a material box, a spray gun, a hose I, a laying mechanism, a controlling unit, a pressurizing mechanism and wheels. According to the equipment for laying the curing agent flooring materials, curing agent materials are laid by a laying pipe, during the laying process, a motor drives the laying pipe to swing back and forth so that the curing agent materials can evenly lay on the ground; the materials are laid at the corners by thespray gun, the problem that curing agent is not laid at the corners after the laying pipe is laid in large area is solved so that the laying equipment can adapt to different laying areas, and the laying pipe or the spray gun is chosen according to different areas, thus the laying efficiency is increased; and the speed of pulling the laying equipment is detected by an electromagnetic pulse sensor,the working speed of the pressurizing mechanism is automatically adjusted according to the moving speed of the laying equipment, the discharging speed is indirectly adjusted, so that the amount of discharging is automatically adjusted under different advancing speeds of the laying equipment, and then the laying materials are more even.

The invention provides a method and apparatus for synchronizing audio and video signals. The method comprises the following steps: extracting frame header information of each image frame contained in a video signal; and adjusting the output of an audio signal according to the frame header information of the image frames to maintain synchronous with the output of the video signal. According to the method and apparatus disclosed by the invention, the information of the image frames of the video signal is extracted, the corresponding image frame information is provided to the audio signal, therefore the output of the audio signal can be adjusted to ensure that audio output and video output maintain synchronous, and thus improving the quality of audio-visual programs and enhancing the user experience.

The invention discloses a method for producing biodiesel from chlorella. The method comprises the following steps: (1) seed culture; (2) seed collection; (3) photoautotrophic cultivation; (4) harvesting of microalgae; and (5) oil extraction. The method provided by the invention uses common chlorella and conditions like mild illumination and light quality, sufficient nutrients, a proper nitrogen-phosphorus ratio and proper temperature and can promote rapid growth of chlorella cells, accumulation of oil and stabilization and improvement of oil quality.

The invention discloses a wind power-photovoltaic-heat storage combined power generation system that comprises a wind farm, a photovoltaic power station, an electric heater, a heat storage system anda power generation module; power generated by the wind farm shares a direct current bus with direct current generated by the photovoltaic power station after being rectified; the generated power passes an inverter and a booster substation and is connected with the power grid; the electric heater converts the electric energy exceeding the channel capacity in the wind farm and the photovoltaic powerstation into heat energy to be stored in the heat storage system, and when the output electric energy of the wind farm and the photovoltaic power station is insufficient in the channel capacity, theheat storage system releases the heat energy to push the power generation module to generate power and transmit the power to the power grid. The invention also discloses a multi-objective capacity optimization method of the system. The invention discloses the multi-target capacity optimization method for the wind power-photovoltaic-heat storage combined power generation system. The investment costof the combined power generation system can be effectively reduced, the channel utilization rate of the system is improved, and meanwhile, the Pareto frontier graph obtained by the multi-objective optimization method is more helpful for a decision maker to determine the optimal capacity ratio of the combined power generation system according to economy and reliability preferences.

The invention provides a gravel aggregate continuous grading production system for high-performance concrete and a process using the system. The system comprises a small stone bin, a large stone bin, an intermediate crushing unit, a material returning screen, a fine crushing unit, a grading screen, a transition material field, a powder removing unit and a sand bin, wherein the intermediate crushing unit, the material returning screen, the fine crushing unit and the grading screen are sequentially connected, and the transition material field, the powder removing unit and the sand bin are sequentially connected. An oversize outlet of the material returning screen is connected with an inlet of the intermediate crushing unit, an oversize outlet of the grading screen is connected with the large stone bin, a first outlet, a second outlet and a third outlet are formed below the grading screen, the first outlet and the second outlet are connected with the transition material field, the third outlet is connected with the small stone bin, and the small stone bin and the large stone bin are connected with an inlet of the fine crushing unit. According to the gravel aggregate continuous grading production system for high-performance concrete and the process using the system, the gradation of produced sand aggregate is continuously adjustable, the yield of the sand material for concrete can be fully adjusted, and the working condition of large fluctuation of the requirement of the sand aggregate in constructional engineering is met; and the feeding void ratio of the fine crushing unit is reduced, and the quality of the gravel aggregate is improved.

The invention provides an eyelid opening device with a cleaning stent. The eyelid opening device comprises an eyelid opener main body, two retractor arms and a cleaning stent, wherein the two retractor arms are arranged at one end of the eyelid opener main body; the cleaning stent comprises a first connecting rod and a second connecting rod; one end of the first connecting rod is arranged on the eyelid opener main body; the first connecting rod extends to the upper part of the eyelid opener main body; the other end of the first connecting rod is connected with one end of the second connecting rod through a self-locking shaft; an output assembly is arranged at the other end of the second connecting rod and is in threaded connection with a cleaning water tube. According to the device disclosed by the invention, the cleaning stent used for fixing the cleaning water tube is arranged on the eyelid opener main body, and the cleaning water tube is in threaded connection with the cleaning stent, so that a doctor only needs to fix the eyelid opener at a to-be-tested eye part of a patient, namely the eyes can be automatically cleaned during eyelid examination, and the eyes can be conveniently and completely examined by the doctor.

A small-power three-phase AC switched reluctance power generator / motor converter comprises three phase winding conversion branches, a reversible bridge-type conversion circuit and an electrolytic capacitor, wherein each three phase winding conversion branch is connected in parallel and then is rectified to output by the reversible bridge-type conversion circuit, the output is used as a resonant capacitor in the phase winding conversion branch during operation of a power generator to provide excitation, the output also can be inversed by the reversible bridge-type conversion circuit for supplying power to each phase winding to run a motor, and alternating current can be given out or utilized to work. The whole converter system runs in a plurality of quadrants, is high in controllability and flexibility and is suitably used a small-size switched reluctance machine integrated utilization system under the condition of no power grid.

The invention provides a waste gas cleaning plant, which is formed by accommodating and allocating a catalyst tube-shaped body formed by a tube-shaped body in a muffler, and is used to adjust the output of a motor without depending only on the pipe length, and also improve the gas exhausting effect and the performance. The waste gas cleaning plant is formed by accommodating the catalyst tube-shaped body formed by a perforated plate which is attached with catalyst in the muffler having a plurality of expansion chambers; wherein, the catalyst tube-shaped body (15) is allocated in an expansion chamber (8) at the uppermost stream of an exhaust stream, namely allocating the catalyst tube-shaped body (15) in the expansion chamber (8) which is nearest to a connecting pipe (11) connected with an exhaust pipe at the flank of the motor, an outer cylinder is used for coating the periphery of the catalyst tube-shaped body (15), tap holes which are isolated with a certain distance along the posteroanterior direction and are overlapped with the catalyst tube-shaped body along the posteroanterior direction are arranged on the outer cylinder, and a part of waste gas which passes the circumference of the catalyst tube-shaped body is leaked to the expansion chambers through the tap holes.

A power generator controller includes a power system monitor and a power generator output optimizing part. The power system monitor keeps check on current status of a power system and puts out an electricity demand. The power generator output optimizing part solves an objective function for determining outputs of power generators of the power system at an interval under a supply and demand balancing constraint which imposes agreement between electric power demanded and electric power supplied. The objective function minimizes total costs in power generation. The power generator output optimizing part solves the objective function further considering an automatic frequency control capacity constraint based on an upper limit of rates of change of outputs of power generators of the power system.

The invention discloses an air conditioning system. The air conditioning system comprises an outdoor unit and multiple indoor units. The outdoor unit and each indoor unit are connected through a gas pipe and a liquid pipe to form a circulation loop. An unloading device is arranged between the corresponding gas pipe and liquid pipe connected with each indoor unit and used for adjusting the refrigerant flow in the corresponding gas pipe or liquid pipe. The invention further discloses a multi-split air conditioner, a control method of the multi-split air conditioner and a storage medium. In the technical scheme, the corresponding unloading device is arranged between the corresponding gas pipe and liquid pipe enabling each indoor unit to be connected with the outdoor unit, and when energy output of the indoor units is adjusted, the unloading devices are started to output part of refrigerants between the indoor units and the outdoor unit through the unloading devices; and therefore, energy output of the indoor units is adjusted in the manner of unloading energy of pipelines connected with the indoor units, energy output of part of indoor units is adjusted, and meanwhile it is guaranteed that energy output of other indoor units cannot be influenced.

The invention relates to a calcium carbide illuminating lamp. The lamp comprises a water barrel and a calcium carbide barrel which are detachably connected, wherein the water barrel is connected at the top of the calcium carbide barrel; a gas pipe penetrating through the wall of the water barrel and communicating with the calcium carbide barrel is arranged in the water barrel; a fire nozzle is connected onto the gas pipe; a water inlet is formed in the top of the water barrel; a plurality of water outlets are formed in the bottom of the water barrel; and the lamp further comprises an adjusting device, and the adjusting device penetrates through the inside of the water barrel, extends into the calcium carbide barrel, controls the water outlets to be opened or closed and stirs calcium carbide simultaneously. According to the lamp, the adjusting device is arranged, so that the opening size of the water outlets 12 can be adjusted, the amount of water entering the calcium carbide barrel can be controlled, the yield of acetylene can be controlled, and the condition that bubbles are produced due to the too high yield of acetylene is avoided; meanwhile, calcium carbide is stirred while the amount of the water entering the calcium carbide barrel is adjusted, accordingly, calcium carbide can make full contact with water for a reaction, and the lamp is convenient to operate.

The invention discloses a car lamp manufacturing method, which includes the following steps of 1) producing a multi-angle light source module; 2) producing a constant-current driving circuit board; and 3) producing a lamp holder. The invention further discloses a car lamp manufactured by the car lamp manufacturing method. The car lamp manufacturing method is simple in process, low in cost, easy to realize and capable of quickly manufacturing car lamps with large lighting angle and fine lighting effect. In the car lamp, disc-shaped light sources and elongated light sources of the multi-angle light source module are distributed scientifically to form a novel light distribution scheme, light distribution is convenient and flexible, lighting angle is large, light distribution by conventional lighting panels or lenses can be avoided, and error appearing in secondary lens optical simulation and affection on light effect from actual construction mounting can be reduced well. In addition, the projections with light reflecting function and heat radiation boosting function are arranged, thereby light distribution effect can be improved well, heat radiation effect can be improved, and the service life of the car lamp can be prolonged effectively.

The invention discloses a stranding cage discharging system and discharging method for swill separation. The stranding cage discharging system comprises an extruding frame, an extruding shell, a spiral rod, an extruding motor and a locking mechanism. The extruding shell is internally provided with two or more communicating extruding cavities, and provided with water outlets. The spiral rod is rotatably mounted in the extruding shell and penetrates through all the extruding cavities. The extruding motor rotates to drive the spiral rod to rotate, and thus kitchen swill located in the extruding cavities is extruded from one end of a shell body to the other end of the shell body. The locking mechanism comprises a locking shell, a discharging assembly, a spring and pressure blocks. The lockingshell is mounted at the other end of the extruding shell and provided with a circular through groove. The discharging assembly comprises a pressing rod and a discharging block, and the discharging block is of a circular-truncated-cone structure and is coaxially connected with the spiral rod. The pressing rod and the discharging block are coaxially connected and rotatably mounted in the locking shell. The discharging efficiency is improved, the working time is reduced, the moisture content can be adjusted, the suitable living environment for subsequent biodegradation is guaranteed, the rate ofsubsequent degradation is increased, and the effect of subsequent degradation is improved.

The invention relates to a prefabricated type high-rise residential barrel shuttering dense-rib prestressed floor structure system. The prefabricated type high-rise residential barrel shuttering dense-rib prestressed floor structure system is characterized by involving a vertical barrel structure, horizontal floor structures and construction connection nodes, wherein the construction connection nodes comprise a structural connection point and a building construction node, the vertical barrel structure is connected with the horizontal floor structures through the construction connection nodes together to form a high-rise residential building overall structure. The prefabricated type high-rise residential barrel shuttering dense-rib prestressed floor structure system has the beneficial effects that a barrel shuttering dense-rib prestressed floor structure system is adopted, the variety richness of prefabricated components can be improved, the industrial chain of prefabricated component products is prolonged, and the production efficiency of the prefabricated high-rise residential industry is improved; and the number of a reinforced concrete shear wall can be reduced, and conditions are created for various requirements of a functional room in an unit, so that a user can flexibly arrange and use the room according to the requirements of the user on the premise that the structural components are not damaged or changed by the user.

The invention belongs to the technical field of water electrolysis, and relates to a device and method for producing hydrogen through step-by-step water electrolysis based on an all-vanadium liquid flow redox medium The device comprises two diaphragm electrolytic cells (a cell 1 and a cell 2), a hydrogen evolution unit and an acidic all-vanadium electrolyte. According to the method, the water electrolysis is divided into two steps, charging an all-vanadium redox flow battery and producing hydrogen and oxygen. According to the first step, VO < 2 + > in an anode chamber in a tank 1 is oxidized into VO < 2 + >, and the VO 2 <+> is introduced into a tank 2; and V < 3 + > in a cathode chamber in the tank 1 is reduced into V < 2 + >, and meanwhile, the V < 2 + > is introduced into the hydrogen evolution unit. According to the second 2, in a tank 2, VO 2 <+> in the cathode chamber is reduced into VO < 2 + > and the VO < 2 + > is circulated back to the tank 1, and meanwhile, the anode generates oxygen; and V < 2 + > is oxidized into V < 3 + > in the hydrogen evolution unit and the V < 3 + > is circulated back to the tank 1, and hydrogen is generated at the same time. According to the method of the invention, hydrogen and oxygen can be separated out in different spaces and time, so that high-purity hydrogen is prepared; meanwhile, the electrolysis voltage is reduced, and the hydrogen production volume can be adjusted by controlling the amount of the electrolyte.