947 results about "Mixed flow" patented technology

The invention discloses flexible intelligent manufacturing equipment, which comprises a rack, a plurality of working modules, a detachable fixing mechanism, a module position detection unit and a control unit, and is characterized in that the module position detection unit is used for detecting the positions of the working modules on a mounting surface; the control unit is used for generating a position adjusting signal according to module data collected by the module position detection unit, and all the module fixed interface groups and the standardized fixed interface groups have the same matching size and connection form so as to realize interchange of working modules of the same type or different types. The problems that a traditional equipment module is tedious to replace and insufficient in positioning precision are effectively solved, the downtime can be remarkably shortened, the problems of material conveying clamping stagnation, mechanical interference, machining precision reduction and the like caused by module position deviation are solved, and the high-flexibility requirement of multi-variety mixed flow production can be further met.

The invention discloses a deep-sea mining multiphase flow particle conveying prediction and regulation method based on flow pattern recognition. The method comprises the steps that pressure, flow, bubble or liquid drop volume fractions and solid particle volume fractions at different positions in a pipeline are periodically collected through collection equipment; according to the pipe diameter and the gas-liquid ratio and the mixing flow speed obtained through calculation, a pre-built-in flow pattern division algorithm is called, and bubble flow, slug flow, vortex and annular flow are distinguished; solving the volume fractions of gas-liquid discrete units of any diameter in different flow patterns; the conveying speed of solid particles in the multiphase flow is obtained according to the gas-liquid dispersed phase volume fraction; and whether the obtained solid particle conveying speed reaches a preset optimal interval or not is judged, and the flow pattern or the gas-liquid ratio of the multiphase flow in the pipeline is controlled according to the result so as to adjust the solid particle conveying speed. The mining efficiency of submarine minerals can be improved, a dangerous flow pattern formed by an unreasonable gas-liquid distribution ratio can be avoided, and efficiency and safety are both considered.

The invention provides a concentric circle circulating flow sewage treatment system based on electric strengthening and a control method. The system comprises a concentric circle circulating flow reactor, a microbial electric strengthening unit and an AI driving control unit, a concentric circle double-ring gallery and multi-point water inlet and multi-point backflow achieve a complete mixed flow type flow state of transverse plug flow and longitudinal circulation flow, the concentric circle circulation flow state is coupled with the microbial electric strengthening unit to form gas-liquid-solid-electricity four-phase turbulent flow to break a mass transfer boundary layer, and the contact efficiency and the mass transfer efficiency of sewage and microorganisms are strengthened. The anodes and the cathodes of concentric circle structures are closely arranged to generate electric field gradient to regulate and control spatial distribution of microbial communities, dynamic polarity switching is achieved through an AI system, the reactor is endowed with the self-adaptive capacity for coping with water quality fluctuation, and the sewage carbon, nitrogen and phosphorus removal treatment efficiency is improved in a breakthrough mode.

The invention discloses a quantitative recognition device for the number and size of bubbles at a rotating impeller of a multiphase pump. The quantitative recognition device comprises a two-phase flow experiment system, the multiphase pump, a high-speed camera, a light source and the like. The preprocessing and data analysis system and the deep learning system are arranged in the computer; the two-phase flow experiment system and the image acquisition system are electrically connected with the computer through lines. The invention further discloses a quantitative recognition method for the number and size of the bubbles at the rotating impeller of the multiphase pump. According to the method, the problems of low blistering recognition precision, low efficiency and large error caused by the existing manual measurement method are solved, and a reference method is provided for exploring the influence of gas distribution at the impeller in the multiphase pump on pump operation and optimizing design of the multiphase pump.

The invention discloses a shaping scheduling method and device for vehicle-mounted mixed traffic, a storage medium and equipment, and the method comprises the steps: dividing different traffic into a first type of traffic, a second type of traffic and a third type of traffic according to the source and importance of a control domain of vehicle-mounted network traffic; dividing the first type of traffic into a plurality of priorities, and periodically scheduling the first type of traffic according to the sequence of the priorities from high to low and the gate control switch state information list; dividing the second type of traffic into a first sub-type of traffic and a second sub-type of traffic, and alternately scheduling the two sub-type of traffic according to a preset credit adjustment rule; sequentially scheduling the third-class traffic of different queues according to the sequence of queue generation, and when an idle time slot exists between the current traffic queue of the third-class traffic and the adjacent next traffic queue, scheduling the third-class traffic according to a preset scheduling rule. And reading traffic from a plurality of to-be-scheduled traffic queues adjacent to the current traffic queue, and filling the traffic into an idle time slot for scheduling.

The invention discloses a water turbine guide vane shaft-top cover rub-impact coupling system vibration characteristic analysis method which comprises the following steps: S1, establishing a reduction dynamic model of a guide vane shaft-top cover rub-impact coupling system by adopting a finite element method in combination with a fixed interface modal synthesis method; s2, analyzing an influence rule of a modal truncation number, a friction coefficient and a water flow surface load on first three orders of prestress modal characteristics of the guide vane shaft-top cover rub-impact coupling system based on a reduction kinetic model; s3, analyzing an influence rule of a near load end contact state, a near-far load end contact state and a friction coefficient on vibration response and spectral characteristics of the guide vane shaft-top cover rub-impact coupling system when the reduction kinetic model is subjected to harmonic excitation; and S4, evaluating whether the mixed-flow water turbine operates stably and safely based on the steps. By analyzing the vibration characteristics of the guide vane shaft-top cover rub-impact coupling system of the mixed-flow water turbine, the structural health state and fault of the mixed-flow water turbine are monitored and diagnosed.

The utility model provides a reaction tank for heat transfer fluid production. The reaction tank comprises a reaction kettle main body, an omnidirectional flow mixing assembly and a convection ring seat, a linear actuator is arranged on the top surface of the reaction kettle main body and drives the omni-directional flow mixing assembly to do lifting motion in the reaction kettle main body. The omni-directional flow mixing assembly comprises a circulating guide cylinder, a driving machine cylinder and a centrifugal impeller, the flow speed of liquid in the circulating guide cylinder is increased through high-speed rotation of the centrifugal impeller, and high-speed conveying and flow mixing stirring of the liquid are achieved. The convection ring seat is positioned at the bottom end of the omnidirectional flow mixing assembly, and liquid convection spraying is performed through a plurality of spraying holes, so that the liquid is fully mixed in the reaction kettle main body, and the stirring uniformity of the liquid is ensured. The liquid mixing device can realize liquid layered mixing in the vertical direction, avoids local uneven mixing, improves the mixing efficiency of heat conduction liquid, and is suitable for efficient stirring of various complex liquids.

The invention relates to the technical field of nitrogen and oxygen mixed flow, and discloses a large-flow high-precision nitrogen and oxygen mixed flow system. The system comprises a gas attribute feature library construction module for periodically collecting historical component data to generate a feature library containing flow and concentration reference values; the real-time gas component monitoring module is used for acquiring the real-time component concentration and flow value of the current nitrogen and oxygen; the mixed flow deviation analysis module is used for generating a component deviation matrix according to the reference value and the real-time value; the dynamic parameter optimization module retrieves the matched flow fluctuation data set, and when the dispersion exceeds a threshold value, the proportion of the total duration from the historical start to the current moment is calculated to serve as the gas compensation proportion; and the mixed flow execution control module is used for adjusting input proportioning parameters of nitrogen and oxygen from a historical starting moment based on the compensation proportion. According to the system, all the modules work cooperatively, and high-precision mixing of nitrogen and oxygen under large flow is achieved.

Seed on-demand system for granular material comprising at least one storage container for granular material, at least one fan to provide a conveyor air flow, and a distributing device with a distributor housing which is designed to receive material from the storage container by means of a material inlet opening and has a conveyor air opening to direct the conveyor air flow in the direction of the material received to generate a mixed flow of conveyor air and material, and at least one distributing segment which forms at least one first conduit with a first receiving opening and a first outlet opening, wherein the conduit is arranged to receive at least a part of the mixed flow by means of the receiving opening and to discharge it from the outlet opening. To avoid disturbances in the distribution of the material and simultaneously generate the mixed flow in an energy-efficient manner, it is provided that at least one stirring element is arranged between the material inlet opening and the first receiving opening to loosen the material in the area where the conveyor air flow is directed onto the material.

A pump assembly includes a housing having a first end, a second end, and an axis extending through, the housing accommodating fluid flow therethrough. A pump assembly includes a pump coupled to the first end of the housing, the pump including an inlet in fluid communication with the housing, a motor configured to drive an output shaft, and a mixed-flow impeller coupled to the output shaft and disposed adjacent to the inlet, the mixed-flow impeller having an inlet diameter and an outlet diameter that is greater than the inlet diameter, the mixed-flow impeller configured to output fluid at an acute angle relative to the axis. A pump assembly includes a handle coupled to the second end of the housing and including an outlet in fluid communication with the housing, the handle also including a battery receptacle electrically coupled to the motor and configured to receive a battery pack.

The invention discloses an integrated tower-shaped hydrogen production gas-liquid treatment device and method, the integrated tower-shaped hydrogen production gas-liquid treatment device comprises a wave stabilizing section, an electrolyte cooling section, a gas-liquid separation section, a gas washing section, a gas cooling section and a fog drop separation section which are sequentially communicated from bottom to top, the wave stabilizing section is internally provided with a wave stabilizing device, and the bottom of the wave stabilizing section is provided with an electrolyte outlet; a first tubular heat exchanger is arranged in the electrolyte cooling section, a first cooling medium inlet and a first cooling medium outlet are formed in the side face of the electrolyte cooling section, a dispersing disc and a gas rising device are arranged in the gas-liquid separation section, a tangential gas-liquid mixed flow inlet is formed in the side face of the gas-liquid separation section, trapping filler is arranged in the fog drop separation section, and a gas exhaust port is formed in the top of the fog drop separation section. The tangential gas-liquid mixed flow inlet is formed in the side face of the gas-liquid separation section, a gas-liquid mixture enters the gas-liquid separation section in the tangential direction, gas and electrolyte are separated by means of different centrifugal forces borne by gas and liquid phases, alkali mist and undissolved particles carried in the gas are reduced, and the separation efficiency is improved.

The invention relates to the technical field of electroplating baths with flow mixing mechanisms, and discloses an electroplating bath with a flow mixing mechanism, the electroplating bath comprises a base and a bath body, a stirring assembly is arranged in the bath body, a heating and cooling assembly is arranged at the middle position of the top of the base, and a cleaning assembly is arranged at the rear position of the top of the base; through the arranged stirring assembly, after a worker pours electroplating liquid into the tank body, a second motor is started to drive a rotating gear to do circular motion on an inner gear of an inner gear ring, stirring blades are driven to stir the electroplating liquid in the tank body, and meanwhile, the worker starts a first motor to drive a threaded rod to rotate; the movable block slides back and forth on the outer walls of the threaded rod and the sliding rod, the stirring piece is driven to mix and stir the electroplating liquid in different areas in the tank body, comprehensive mixing of the electroplating liquid in the whole space of the tank body is achieved, the mixing uniformity of the electroplating liquid is improved, and it is guaranteed that the components and the concentration of the electroplating liquid in the tank body are basically consistent.

The invention relates to the technical field of air purification, and discloses a space air particle differentiation system and a control method thereof.The space air particle differentiation system comprises an air particle separation module and a control module, the air particle separation module comprises an air inlet, a cyclone separation barrel and a detachable dust collection barrel, the cyclone separation barrel separates particles in air through centrifugal force classification, and the separated particles fall into the bottom dust collection barrel; the ultraviolet catalysis module comprises an ultraviolet reaction chamber, the inner wall of the ultraviolet reaction chamber is coated with a photocatalyst, and a UV-C light source is configured and used for decomposing organic pollutants and microorganisms; the electron-ozone reaction module comprises a mixed flow pipeline fan and an exhaust port, the mixed flow pipeline fan forms negative pressure airflow in the system, and purified air is exhausted through the exhaust port. Through cooperation of cyclone separation, ultraviolet catalysis and electron-ozone reaction, large particles are removed through cyclone separation, organic matter is decomposed through ultraviolet catalysis, microorganisms and superfine particles are oxidized and decomposed in a reaction chamber through electron flow and ozone, the maintenance period is prolonged, and efficient consumable-free purification is achieved.

The invention provides a portable bladeless fan which is characterized in that a first air inlet part is arranged on the rear side, a first air outlet part is arranged on the front side, and the first air inlet part and the first air outlet part are communicated in a shell; the pressurizing piece is connected with the front side of the shell, the pressurizing piece is provided with a negative pressure channel, and the negative pressure channel guides air on the radial outer side of the shell to the radial inner side of the shell; the mixed flow fan is located in the shell and connected to the rear side of the pressurizing piece, and the mixed flow fan rotates around a rotating shaft to generate airflow; a pressurizing flow guide channel is formed between the mixed flow fan and the shell and between the pressurizing piece and the shell, air enters the pressurizing flow guide channel from the first air inlet part, pressurized mixed flow is formed in the pressurizing flow guide channel and then is exhausted from the first air outlet part, and meanwhile air on the radial outer side of the shell is driven to flow through the negative pressure channel and is guided out from the radial inner side of the shell. On the basis that it is ensured that the first air outlet part exhausts air with enough air volume and air pressure, the air volume and the air supply distance are further increased through air guiding of the negative pressure channel.

The invention provides a mixed flow velocity and flow measuring device and method, and particularly relates to the technical field of measuring instruments, and the device comprises a gas mixing assembly, a flow field optimization assembly, a flow velocity sensing assembly and a signal processing assembly. The gas mixing assembly comprises a differential channel mixer and a mixing cavity, and gas premixing is achieved. The flow field optimization assembly comprises a plurality of air duct partition plates and straight pipe sections, and the mixed gas conveying pipeline is divided into a plurality of independent divided air ducts; the flow velocity sensing assembly comprises a rectification assembly and a pressure sensing assembly, the rectification assembly comprises a pore plate and / or a grid, and the pressure sensing assembly comprises a plurality of uniformly distributed pressure sensing elements; the signal processing assembly comprises a differential pressure sensing transmitter, a static pressure sensing transmitter, a temperature sensing transmitter, an atmospheric pressure sensing transmitter and a data processing module. The pressure sensing element detects differential pressure signals, the differential pressure sensing transmitter converts the signals, the data processing module calculates the average flow velocity and flow of the mixed gas based on the signals and measurement data, and the measurement precision and accuracy are improved.

The invention relates to the technical field of rain and sewage diversion, in particular to a rain and sewage diversion optimization method based on combination of terrain gravity and a pipe network, in the rain and sewage diversion optimization method, slope calculation, flow gradient analysis and section resistance matching are combined, a rain and sewage mixed flow trend and a pipeline full flow section are accurately recognized, drainage capacity distribution is optimized, and the rain and sewage diversion efficiency is improved. According to the method, a slope imbalance section and a discharge capacity difference area can be recognized in advance through transmission capacity calculation and flow velocity gradient analysis, data support is provided for load distribution optimization, a Markov switching system is combined with flow direction transfer rate calculation and pressure fluctuation analysis, the system adjusts the flow direction based on dynamic changes of different discharge modes, and the flow direction transfer rate calculation and pressure fluctuation analysis are combined. The influence of burst flow impact is reduced, a dynamic flow direction adjusting strategy is constructed through a hidden Markov model, self-adaptive matching is formed between flow direction change analysis and a diversion transfer strategy, the accuracy of rainwater and sewage diversion is improved, regulation and control error calculation is combined with flow direction equilibrium adjustment, and setting of switching points and overflow adjusting parameters is more flexible.

The invention belongs to the technical field of metal materials and radiation protection, and particularly relates to a preparation method of thermal neutron shielding steel. According to the method, efficient spray forming of the B4C / 304 stainless steel composite material is achieved through a gas-solid two-phase flow driving mechanism under the negative pressure environment, B4C ceramic particles are evenly dispersed and embedded into a 304 stainless steel matrix, and due to the strong driving force of gas-solid two-phase flow, firm interface bonding is formed between the B4C particles and the matrix. According to the process, gas atomization and solid-phase medium particles are combined, a gas-solid two-phase mixed flow is formed, the atomization efficiency is greatly improved, the powder particle size is refined, reinforced phase distribution is optimized, and a new way is opened up for preparation of the high-performance thermal neutron shielding steel composite material.

The invention discloses a mixed-flow type runner welding device for a water turbine, and belongs to the technical field of welding devices. The welding machine comprises a main body welding machine and a locking mechanism, the locking mechanism used for disconnection protection is arranged in one side of the surface of the main body welding machine, and the welding machine has the advantages that a failed mechanical arm can be automatically limited, so that the possibility that the mechanical arm rotates and droops at will due to rotation failure is avoided; automatic locking of the ratchet wheel structure can fix the joint position at the moment of rigidity loss, it is ensured that welding is kept on an original welding track, welding size deviation caused by the fact that the mechanical arm is out of control and droops is avoided, meanwhile, quick response of locking of the first ratchet wheel and the second ratchet wheel which are arranged forwards and backwards can lock the joint when the drooping tendency just occurs, and welding quality is improved. The automatic welding device has the advantages that further displacement of the mechanical arm is prevented, hard contact between a welding gun and a workpiece is avoided, workpiece scrapping and equipment maintenance cost is reduced, and therefore the safety of the automatic welding device during working is greatly improved while welding stability is guaranteed.

The invention belongs to the field of system optimization and production scheduling, and particularly relates to an optimization control method of a conveyor belt feeding processing system capable of performing mixed-flow production of multiple types of workpieces in consideration of product demand conditions. The multi-variety workpiece mixed flow conveying belt feeding processing system comprises a conveying belt, a photoelectric sensor, # imgabs 0 # different types of workpieces, a processing main body, # imgabs 1 # cache libraries with different capacities and corresponding finished product libraries with different capacities. Firstly, the state, action and corresponding strategy of the system are defined, and the decision moment and decision process of the system are determined according to the working mechanism of the system; and then, according to the random characteristics and the decision process of the system, establishing a semi-Markov decision process model for optimizing the control problem, and solving an optimal strategy by using a strategy iterative algorithm. According to the invention, the productivity of the multi-dimensional flexible CSPS system can be effectively improved, and the requirements of customers can be better met.

The utility model discloses a water tank for dust removal and cooling of waste gas, which belongs to the field of waste gas treatment technology, and is used to solve at least one of the problems in the prior art that the high dust content of the treated waste gas leads to equipment blockage, the time-consuming and labor-intensive cleaning of the waste gas treatment equipment after blockage, and the high energy consumption for cooling the waste gas. The water tank includes a baffle, a guide assembly and a main spray assembly. The baffle divides the space above the liquid surface of the water tank into a mixed flow chamber and an exhaust chamber that are sequentially connected along the moving direction of the waste gas. The guide assembly is arranged in the mixed flow chamber; the guide assembly has a zigzag main fluid channel, the waste gas inlet of the main fluid channel is connected to the air inlet of the water tank, and the waste gas outlet of the main fluid channel is connected to the exhaust chamber; the main spray assembly is arranged in the main fluid channel. The utility model can be used for process waste gas treatment.

The invention provides a mixed-flow pump with a built-in automatic cleaning mechanism, and relates to the technical field of water pumps, the mixed-flow pump comprises a bottom plate, a mounting seat is fixedly mounted on the surface of the bottom plate, and a motor is fixedly mounted on the surface of the mounting seat. A connecting rod is connected with a fixing disc and a connecting plate, so that the pump shaft drives the fixing disc to rotate when rotating, a rotating ring rotates, a scraper A is rotationally connected with the interior of a protective shell, the scraper A is always tightly attached to the inner wall of the pump shell through the pre-tightening force of a torsional spring, sediment is continuously scraped in the running process of the pump, and the cleaning efficiency is improved; when large solid particles or hard sediments appear in the protective shell, the scraper A can be bent backwards to give way when bearing too large resistance, strong impact is avoided, the stable scraping function is kept, the self-cleaning capacity of the interior of the pump shell is improved, the pump shell can cope with the sediments under different working conditions, and the maintenance requirement is reduced.

The present invention relates to the technical field of heat exchange equipment, and specifically discloses a composite mixed flow air cooler with a peak device, comprising: a shell, an induced draft fan, a medium transfer pipe, a water supply pipe, a regulating valve 1, a water supply tee, a regulating valve 2, a cooling filler, an evaporating coil, an evaporating coil regulating air inlet window, a cooling filler regulating air inlet window, an air cooler regulating air inlet window, a medium inlet, a circulating water tank, an air cooler, a mist bed, an air mixing chamber, a cooling filler water distribution device, an evaporating coil water distribution device, a medium outlet, and a water collector. The present invention has multiple operating modes, such as a peak operating mode, a summer operating mode, a spring and autumn combined operating mode, a water-off operating mode, and an antifreeze mode, which can meet different usage scenarios. In addition, the invention has unique mixed flow drip cooling and condensation technology and condensation recovery and reheating technology, achieving multiple functions of water saving, energy saving, and white mist elimination.

The invention discloses a mixed-flow pump with a self-adaptive blade setting angle in a transient process. The mixed-flow pump comprises a blade adjusting structure and a self-adaptive control unit, the blade adjusting structure is arranged in an impeller hub and comprises a telescopic device, one end of the telescopic device is arranged outside a pump shaft in a sleeving mode, and a driving gear is fixedly connected outside the end of the telescopic device. The other end is connected with the servo motor; a driven gear is arranged at the position of the meshing point and fixedly connected with one end of a blade fixing shaft, the blade fixing shaft is embedded in the impeller hub, and the other end of the blade fixing shaft is connected with blades. The blade fixing shaft is provided with a blade fixing shaft rotation braking device; the self-adaptive control unit comprises a computer control system and a pump operation data acquisition device, the pump operation data acquisition device is in signal connection with the computer control system, and the computer control system outputs a blade adjusting instruction to the blade adjusting structure to adjust the blade placement angle. The device can realize the self-adaptive adjustment of the blade setting angle in the transient process, and adapts to different liquid flow angle changes, so that the efficiency of the mixed-flow pump is improved, and the pressure pulsation, vibration and the like in the transient process of starting and stopping of the pump and the operation under the bias working condition are reduced.

The invention relates to a vertical shaft mixed-flow pump with a novel structure. The vertical shaft mixed-flow pump comprises a stuffing box, a bearing body component, a pump shaft, a pump body, an impeller and a motor, a pump shaft is directly connected with a motor and an impeller, a bearing body part is located on the upper portion of a stuffing box, and the bearing body part is directly and rigidly connected with a pump body through a flange structure; the bearing body part comprises at least two groups of angular contact ball bearings which are arranged back to back; the motor is installed at the upper end of the bearing body component. The bearing body part is integrated on the upper portion of the water pump layer stuffing box, a traditional motor base structure is omitted, and the pump shaft is directly connected with the motor and the impeller. According to the design, the manufacturing cost is remarkably reduced, the axial installation size is shortened, meanwhile, the vibration of equipment is reduced by optimizing an axial force transmission path, and the device is particularly suitable for pump station transformation projects with limited space.

The utility model relates to the technical field of cyclone spray towers, and particularly discloses a spray tower pneumatic flow mixing device which comprises a water storage tank, a frame body is fixedly arranged at the top of the water storage tank, a spray tower is fixedly arranged at the top of the frame body, and a cyclone cylinder is fixedly arranged between the bottom of the spray tower and the top of the water storage tank. An air inlet channel is formed in one side of the bottom of the cyclone cylinder, an air outlet channel is formed in the top end of the spraying tower, a water pump and a circulating water tank are sequentially and fixedly arranged on the side wall of one side of the water storage tank, a plurality of filter screens are slidably arranged on the top of an inner cavity of the water storage tank, and a noise reduction assembly is arranged outside the water pump. According to the utility model, sewage after dust fall of the spray tower can be efficiently filtered, and single filter screens can be alternately disassembled and assembled without stopping the machine to suspend the spray dust fall operation; by arranging the noise reduction assembly, noise generated during operation of the water pump can be reduced, and then noise generated during operation of the cyclone spray tower is reduced.

The utility model belongs to the technical field of reactors, and particularly relates to a multiphase unpowered reactor, which comprises a vertical shell, an upper reaction area and a lower liquid collection area are arranged in the shell, and the reaction area is communicated with the liquid collection area through a cap hood, and is characterized in that an annular pipe is arranged in the middle of the reaction area and is connected with a feed port of the shell through a feed pipe; a plurality of horizontal circulating hydraulic sprayers are arranged on the annular pipe, and the axis of at least one horizontal circulating hydraulic sprayer is tangential to the outer side of the annular pipe; a cross pipe is arranged at the lower part of the reaction area; a plurality of vertical circulating hydraulic sprayers are arranged on the cross pipe; and the horizontal circulating hydraulic spray head and the vertical circulating hydraulic spray head are venturi mixed flow spray heads. The utility model has the beneficial effects that the middle section and the lower section of the reaction area of the shell adopt two sections of liquid-phase hydraulic sprayers to be combined with the atomizing sprayers at the top of the reaction area to respectively form liquid flow in the vertical direction and the horizontal direction, so that the mixing effect of gas-phase, liquid-phase and solid-phase substances is enhanced, and the conversion efficiency is improved.

The utility model provides a protective top cover suitable for a motor with a mixed flow ventilation structure, which comprises a cover body and a bottom plate, and the inside of the cover body is divided into an air inlet chamber and an air outlet chamber by a main partition plate; a flow guide partition plate is arranged in the air inlet cavity and divides the air inlet cavity into a front air inlet space, an upper air inlet space and a rear air inlet space, and a louver for external air inlet is arranged on a side plate of the front air inlet space. A steel plate net and an inclined baffle are installed at an air outlet of the air outlet cavity, and the inclined baffle obliquely extends upwards from the position below the air outlet to the inner side of the air outlet cavity. According to the utility model, the air inlet chamber adopts the blind window and the zigzag air inlet space structure, and the air outlet of the air outlet chamber adopts the inclined baffle plate and the steel screen, so that water splashing in different directions can be borne, high-speed air and airborne particles are prevented from directly leading to the internal air path of the electrified part of the motor, and the I P24 protection grade is reached; and meanwhile, mechanical noise caused by a large fan of a mixed flow ventilation structure motor is reduced.

The application discloses a kind of purification devices for diphenylamine production, it is related to chemical purification technical field, including purification tank body, stirring mixing assembly and lifting mixed flow component are equipped in the purification tank body, stirring mixing assembly and lifting mixed flow component are jointly connected comprehensive drive component;The lifting mixed flow component includes multiple dispersion pipes arranged in the purification tank body, multiple dispersion pipes are evenly distributed in the circumferential of purification tank body, lifting column is slidably connected in each dispersion pipe, the top end of lifting column is fixedly connected with traction rope, the diphenylamine solution in the purification tank body can be mixed as a whole by being equipped with stirring mixing assembly, the diphenylamine solution can be fine flow mixing by being equipped with lifting mixed flow component using pressure-driven mode, stirring mixing assembly and lifting mixed flow component are jointly used to effectively ensure that the diphenylamine solution in the purification tank body is efficiently mixed, so that diphenylamine is more efficiently purified, and the use effect is good.

The invention discloses a numerical simulation method for a landslide surge induced glacial lake outburst flood disaster chain, which comprises the following steps of: coupling a depth average mixed flow model of four-phase media of water, coarse particles, fine particles and a gas phase on the basis of a continuous medium mechanical method, and acquiring data required by the numerical simulation method. According to the method, a continuous medium mechanics theory is combined, a continuous medium mechanics method is coupled with a depth average mixed flow model of four-phase media including water, coarse particles, fine particles and a gas phase, and a finite difference method is adopted to realize numerical simulation of a landslide surge induced glacial lake outburst flood disaster chain. According to the numerical simulation method for the landslide surge-induced glacial lake outburst flood disaster chain, the coupling of the whole process of the glacial lake outburst disaster chain from landslide movement to induction of surge by landslide into the lake and then induction of glacial lake outburst by surge and flood routing is comprehensively considered, and the whole-process simulation of the landslide-induced glacial lake outburst flood disaster chain is successfully realized; and technical support is provided for the field of glacial lake outburst.

The utility model discloses a low-noise mixed flow fan in the technical field of fans, which comprises a shell, the shell is provided with an air inlet and an air outlet, the shell is cylindrical, a motor is arranged in the shell, an output rotating shaft of the motor faces the air inlet and coincides with the axis of the shell, and the output rotating shaft of the motor is provided with a backward-tilting centrifugal impeller. A partition plate is arranged in the machine shell and divides the inner space of the machine shell into a first cavity and a second cavity, the motor is arranged in the second cavity, an output rotating shaft of the motor penetrates out of the partition plate to enter the first cavity, the backward-tilting centrifugal impeller is arranged in the first cavity, and the size of the backward-tilting centrifugal impeller is matched with the size of the first cavity. An air guide groove parallel to the axis of the machine shell is formed in the side, away from the second cavity, of the partition plate, the end, close to the partition plate, of the air guide groove communicates with the first cavity, and the peripheral side of the air guide groove is isolated from the second cavity. The mixed flow fan structure is designed by combining the shapes of the centrifugal fan impeller and the axial flow fan, the shell structure is effectively utilized, and both the air volume and the air pressure performance are considered.