185results about How to "Discharge fully" patented technology

The invention relates to a cassette cleaning process and a cleaning device thereof. The invention discloses a cassette cleaning process which is used for sequentially performing spraying, ultrasonic cleaning and bubbling rinsing procedures on a cassette. Wherein in the bubbling rinsing step, gas with a certain flow rate is filled into liquid to form tiny bubbles, so that tiny particles falling off in the ultrasonic cleaning step are taken away. The cassette cleaning process has the advantages that tiny particles which fall off during ultrasonic cleaning and then are attached to the surface layer are timely and effectively peeled off again and discharged, secondary attachment is avoided, and the cleaning efficiency and effect are improved; and large-size particles and residual chemical substances in the cassette are cleaned through spraying, so that various types of pollutants are cleaned.

The utility model discloses an outdoor aproll anti-sedimentation structure, which relates to the technical field of building construction, and comprises a construction wall body, and through the arrangement of insertion holes and longitudinal steel bars, when aproll construction is carried out at the joint part of the building wall body, in order to improve the quality of the aproll construction at the edge of the building wall body, the construction process is simple; in order to reduce the condition that the surface is aged and cracked after apron construction, a linear insertion hole can be formed in the surface of a wall body, longitudinal steel bars are inserted into the insertion hole, meanwhile, transverse steel bars are bundled with the longitudinal steel bars through iron wires, so that a grid shape is formed between the longitudinal steel bars, PVC pipes are placed on the surfaces of the grid-shaped steel bars, and the longitudinal steel bars and the transverse steel bars are bundled through the PVC pipes. And all-directional pouring is conducted through concrete, after initial setting of the concrete, the PVC pipe is taken away, a drainage ditch is formed in the surface of the concrete, the drainage ditch is connected with an outdoor rainwater well, the effect of fully draining rainwater of the eave is achieved, and the effect of improving the water dispersing construction quality of the edge of the wall is achieved.

The invention provides a capacity grading method for a high-capacity battery, and the method comprises the steps: carrying out the constant-current discharge of a fully charged battery to a first discharge cut-off voltage according to a first preset current rate at a preset environment temperature, standing for a first preset time length, and enabling the first preset current rate to be smaller than or equal to the maximum continuous charging current of the battery; and performing constant-current discharge on the battery according to a second preset current rate to a second discharge cut-off voltage, standing for a second preset duration, the second preset current rate being less than or equal to the maximum continuous charging current of the battery, and the second discharge cut-off voltage being less than the first discharge cut-off voltage, so that the battery is discharged more fully, the polarization influence is reduced, and the battery quality is improved. The battery capacity obtained through capacity grading is more accurate, the battery state can be better distinguished, more microcosmic lithium is removed from the negative electrode of the battery, a part of lithium difficult to remove under high voltage can be removed, the lithium precipitation problem of the battery can be improved, the cycle life of the battery is prolonged, and the safety of the battery is improved.

The invention belongs to the technical field of riverway cleaning, particularly relates to a riverway cleaning device and a use method thereof, and aims to solve the problems that in the use process of an existing riverway cleaning device, garbage and aquatic plants in a riverway are inconvenient to fully crush and compress, so that the garbage cleaning efficiency is reduced; in order to solve the problems, the invention provides the following scheme: the garbage disposal device comprises a ship body; the mounting plate is fixedly mounted at the top of the ship body, a weight box, a collecting box, a disinfectant box and a treatment box are fixedly mounted at the top of the mounting plate, and a through groove is formed in one side of the mounting plate; in the using process, garbage and aquatic plants in a river channel can be fully crushed and compressed conveniently, then the garbage cleaning efficiency can be effectively improved, sewage generated in the garbage cleaning process can be conveniently treated, the structure is simple, and use is convenient.

The invention relates to the technical field of milk product detection, in particular to a working table applied to milk product detection, which comprises a working platform, an L-shaped fixing plate is fixed at the top of the working platform, vertical plates are symmetrically fixed at the top of the working platform and positioned in front of and behind the L-shaped fixing plate, and an adjusting mechanism is arranged at the bottom of a horizontal section of the L-shaped fixing plate. And a multi-stage electric push rod is installed at the bottom of the adjusting mechanism, a sampling mechanism is arranged at the pushing end of the multi-stage electric push rod, and positioning mechanisms are symmetrically arranged on the two vertical plates front and back with the adjusting mechanism as the center. The adjusting mechanism is adopted to adjust the position of the sampling mechanism, so that the sampling mechanism can be located in different areas to sample milk products, the representativeness of samples is further improved, a separation component in the sampling mechanism can be matched with an extraction component to extract the milk products at different depths and temporarily store the milk products, and the sampling efficiency is improved. Therefore, the representativeness of the sample is further improved.

The invention belongs to the technical field of lampshade production equipment, and discloses a blow molding machine for producing lampshades, which comprises a blow molding machine body, the sliding mechanism is slidably connected to the bottom of one side of the blow molding machine body; and the blowing molds are arranged on the two sides of the top of the sliding mechanism. According to the technical scheme, the ventilation mechanism, the triggering assembly and the sensing assembly are arranged, the whole ventilation mechanism is driven to ventilate, at the moment, redundant blow-molded parts on the top of the ventilation mechanism enter the round hole, and therefore the triggering assembly can be extruded and driven, and the triggering assembly drives the sensing assembly to send a signal to a control end; a driving motor is driven to drive a cutting round block to rotate, so that the cutting round block cuts off the redundant part in a round hole in one side and brings the redundant part to the other side, the redundant part in the middle of a ventilation mechanism is cut off, finally, the redundant part falls into a storage box to be stored, and finally, the purpose of automatically cutting off the redundant part is achieved; and cost increase caused by independent device cutting is avoided.

The invention discloses a vertical permeameter for a soil test, and relates to the technical field of vertical permeameters, the vertical permeameter comprises a sponge sleeve plate, the sponge sleeve plate is used for cleaning the inner wall of a transparent test tube and absorbing water which is not drained, and the inner side of the sponge sleeve plate is provided with a small sleeve block; the vertical permeameter for the soil test has the advantages that the inner walls of the transparent test tubes can be cleaned by the aid of the movable sponge sleeve plates, moisture which is not drained can be absorbed, the inner walls of the transparent test tubes can be cleaned by the aid of the movable sponge sleeve plates, and accordingly the inner walls of the transparent test tubes can be cleaned by the aid of the sponge sleeve plates; the situation that impurities such as dust and marl remaining after multiple tests are accumulated in test tubes for storing test products, and consequently the accuracy of subsequent tests is seriously affected is prevented, and a bottom baffle extrudes the sponge sleeve plate from the bottom of the sponge sleeve plate to drain water and discharges absorbed residual water; the situation that dust and other sundries on the surface are difficult to effectively remove due to the fact that the sponge sleeve plate is in a humid state after absorbing residual water every time is prevented.

The utility model relates to the field of fastener production, and discloses a fastener disc material annealing rack, which comprises a blanking rack and a feeding rack, the blanking rack and the feeding rack both comprise cylindrical supporting cylinders, the bottom of each supporting cylinder is fixedly provided with an annular bottom plate, the inner hole of each bottom plate is smaller than the inner hole of each supporting cylinder, the height of the blanking rack is smaller than 1.8 m, the height of the feeding rack is smaller than 1.5 m, and the bottom of each supporting cylinder is fixedly provided with an annular bottom plate. The feeding frame is stacked on the top of the discharging frame for use, a plurality of conical stiffening plates are fixed to the inner wall of a supporting cylinder of the discharging frame in the vertical direction, a plurality of vertical stiffening ribs are arranged at the upper ends of the conical stiffening plates, a plurality of air holes are formed in the supporting cylinder of the discharging frame and the supporting cylinder of the feeding frame, and hoisting mechanisms are arranged at the top end of the discharging frame and the top end of the feeding frame. According to the utility model, the problems in the prior art that a plurality of coils of wire rod raw materials are sleeved on one material rack during annealing, so that the supporting plate at the bottom of the material rack is very easy to deform and damage in the long-term use process of the material rack, and the wire rod raw materials are difficult to stably place and support can be solved.

The invention provides a glue discharging process of a high-thermal-conductivity silicon nitride ceramic green body, which comprises the following steps: carrying out tape casting on silicon nitride raw powder to prepare a silicon nitride ceramic green body, stacking the silicon nitride ceramic green body into a recrystallized silicon carbide jig, putting the silicon nitride ceramic green body into a horizontal graphite furnace, and carrying out segmented glue discharging to obtain the high-thermal-conductivity silicon nitride ceramic green body. By switching the vacuum environment and the negative pressure environment and controlling the flow rate of nitrogen gas, full release and discharge of organic gas are facilitated in the glue discharging process of the silicon nitride ceramic green body, external oxygen elements are prevented from entering the silicon nitride green body to form lattice oxygen, the oxygen content in the green body is effectively controlled to be lower than 1.5%, and the service life of the green body is prolonged. The pre-sintering process at the temperature of 1400-1500 DEG C is adopted, so that the content of residual carbon in a green body after glue removal is reduced, pores in the green body are reduced, the density of the silicon nitride green body is promoted, the strength of the ceramic green body is improved, and the silicon nitride ceramic substrate is more stable in the subsequent processing process.

The present invention relates to the field of laser printing technology, and in particular to a heat recovery device for laser printing equipment and a recovery method thereof, comprising a printer and a control module, wherein the control module is installed on one side above the printer, a mobile module for walking is installed above the printer, and a heat recovery module is installed at one end of the mobile module, and a heat dissipation module for cooling the control module is connected to the side of the heat recovery module; the present invention surrounds a layer of heat recovery pipe on the outside of the radiator, and drives the cooling liquid to circulate slowly inside the heat recovery pipe through a circulating pump, and cooperates with the radiator to realize heat exchange, at this time, heat recovery can be realized, and when this part of the heat flows through a preheating frame, and when the preheating frame is close to a material extrusion pipe, the material inside the material extrusion pipe can be preheated, which not only ensures the heating and molding quality of the material, but also reduces the burden on the heating block.

The graphene production waste gas purification device comprises a conveying pipe, a first purification frame, an electric push rod, a conveying connecting pipe, a purification treatment main body, a sealing plate, a supporting base and a sealing clamping groove, the supporting base is fixedly connected to the bottom end of the first purification frame, and the sealing clamping groove is formed in the side end of the first purification frame; the electric push rods are symmetrically and fixedly installed at the upper end and the bottom end of the first purification frame, the sealing plates are fixedly connected to the front ends of the electric push rods, and the sealing plates are fixedly connected to the side ends of the first purification frame through the sealing clamping grooves in a clamped mode. The sealing plate can be pushed to move through the electric push rod, so that all the sliding mounting frames, the limiting mounting frame and the filter screen are slidably discharged from the interior of the first purification frame, the filter screen is conveniently cleaned and replaced, and the device can be stably used for a long time and is convenient to use.

The utility model belongs to the technical field of cooking equipment, and particularly provides a cooking utensil. In order to solve the problem that an existing cooking utensil is low in use safety, the cooking utensil comprises a machine body, a machine cover, a water receiving container and an atomization device. The machine body is provided with a cooking cavity. The cover is used for opening and closing the cooking cavity. The water receiving container is arranged in the machine body, a water receiving cavity is defined in the water receiving container, and the water receiving cavity is used for receiving condensate water dripping from the machine cover. The atomization device is arranged in the water receiving cavity and used for atomizing condensate water in the water receiving cavity into water mist and then discharging the water mist, the condensate water can be discharged without heating the condensate water to the evaporation temperature, damage caused by high-temperature gas is avoided, the use safety of the cooking utensil is greatly improved, and therefore the use experience of a user is effectively improved.

The invention relates to the field of electric power storage equipment, in particular to an electric power storage device based on grid-load-storage integration, which comprises an electric power switching storage cabinet, the electric power switching storage cabinet comprises a cabinet body, a plurality of second mounting racks are mounted on one side in the cabinet body, and a plurality of first mounting racks are mounted on the other side in the cabinet body. A vacuum cylinder is installed in the middle of the second installation frame, a branching cylinder is arranged in the vacuum cylinder, the bottom of the branching cylinder penetrates through the middle of the bottom end of the vacuum cylinder, a fixing plate is installed on the upper portion of the periphery of the branching cylinder and fixedly connected to the upper middle portion in the vacuum cylinder, and a plurality of second contact pieces are arranged on the inner side of the branching cylinder. Uniformly distributed lower interfaces are formed in the outer side of the bottom of the tapping cylinder, a rotating cylinder is rotationally connected to the upper portion in the tapping cylinder, and a power connection ring is installed on the lower portion in the rotating cylinder, circuit switching can be automatically achieved according to the charging condition of the power storage module, power waste is avoided, and damage to the power storage module due to continuous charging is reduced.

The invention relates to a submersible hydroelectric generator device (1) comprising a substantially upright body having an outer chamber (9) and an inner pressure chamber (7). The inner pressure chamber (9) has a pressurizable fluid supply therein, and the outer chamber (9) has a charge inlet (21) adjacent to the top of the upright body, a discharge outlet (11) adjacent to the bottom of the upright body, and a liquid passage having a turbine (25) and a flow regulator (27) mounted therein. An auxiliary pressurized fluid supply is provided to replenish the pressurizable fluid supply. A pressure regulator is provided that is operable to control delivery of the auxiliary pressurized fluid from the auxiliary supply to the inner pressure chamber to maintain the pressure of the pressurizable fluid supply at or above a predetermined pressure level during drainage of water from the apparatus. In this way, water will be discharged from the device in a rapid, repeatable manner.

The utility model discloses an alkali metal recycling device which comprises an alkali metal reaction kettle and an alkali metal filter, a discharge port is arranged at the top of the alkali metal reaction kettle, a feed port is arranged at the bottom of the alkali metal filter, and the discharge port is connected with the feed port of the alkali metal filter through a straight pipeline. An extension pipe is arranged at a discharge port of the alkali metal reaction kettle in the kettle, a first switch valve is arranged at a feed port of the alkali metal filter, a filter baffle used for intercepting alkali metal is arranged in the alkali metal filter and comprises a regular hexagonal baffle framework, an elastic filter screen is arranged on the lower surface of the baffle framework, and a second switch valve is arranged on the lower surface of the elastic filter screen. By utilizing the device disclosed by the utility model, the problems of raw material waste, high wastewater treatment cost and high safety risk in the post-treatment process of excessive alkali metal are effectively solved.

The utility model relates to organic silicon production, and provides an organic silicon pouring sealant production system which comprises a mixing device, a storage device and a transfer device for connecting the mixing device and the storage device, the transfer device comprises a feeding device, and the feeding device comprises a feeding pipe; the transfer device further comprises a heat exchange pipe arranged on the outer wall of the feeding pipe in a sleeving mode, a feeding port formed in the position, close to the discharging end of the feeding pipe, of the heat exchange pipe, and a discharging port formed in the position, close to the feeding end of the feeding pipe, of the heat exchange pipe. The discharging end of the feeding pipe is higher than the feeding end of the feeding pipe; the two ends of the heat exchange tube are both sealed ends. The production system of the organic silicon pouring sealant can effectively utilize redundant heat in the production process of the organic silicon pouring sealant to preheat raw materials.

The present invention discloses a strong-ventilation human-defense fire door, which relates to the technical field of fire doors, including a fire door mechanism, wherein a horizontal adjustment mechanism is fixedly connected to the side of the fire door mechanism, an angle adjustment mechanism is installed inside the horizontal adjustment mechanism, a fire door smoke exhaust mechanism is fixedly connected to the upper part of the angle adjustment mechanism, and a height adjustment mechanism is installed at the bottom of the horizontal adjustment mechanism. The present invention exhausts smoke by turning on an axial flow fan, which transmits suction to a smoking pipe through a smoke collecting pipe and a connecting hose, inhales smoke through the smoking pipe, and discharges smoke through the smoke exhaust pipe according to a designed position. When installing the smoking pipe, the smoking pipe is installed at a higher position to ensure a good smoke exhaust effect, while avoiding a low height that affects the escape of personnel. The smoke on the other side of the door panel is discharged outwardly through the fire door smoke exhaust mechanism, thereby reducing the concentration of smoke at the fire scene and increasing the escape time for personnel still at the fire scene.

The invention discloses a multifunctional waste activated carbon regeneration treatment device, and relates to the technical field of waste activated carbon regeneration, the multifunctional waste activated carbon regeneration treatment device comprises a mounting rack, a heater is fixedly connected to the bottom of the mounting rack, a heating furnace is fixedly connected to the top of the heater, and the two sides of the heating furnace are fixedly connected to the top of the mounting rack. The structure of the regeneration device is improved, the double-sleeve overlapping design of the inner sleeve and the outer sleeve is adopted, and reciprocating stretching and retracting of the inner sleeve are matched, so that dome convex blocks which are uniformly laid are extruded, and vibration of the inner sleeve is reversely promoted, and therefore, carbon particles are uniformly vibrated, and the mixing uniformity of the carbon particles is improved; and the inner sleeve can scrape the inner wall of the outer sleeve while ensuring uniform vibration, carbon powder residues are avoided, and therefore the regeneration efficiency is improved, a gap is reserved between the inner sleeve and the outer sleeve through the sliding block, carbon particles are prevented from being crushed, and the situation that the regeneration effect is affected due to uneven regeneration of waste activated carbon is effectively reduced.

The present invention belongs to the technical field of food processing, and specifically relates to an automatic rice mill and a rice processing method, comprising a support seat, a fixed plate is fixedly mounted above the support seat, a rolling plate is mounted above the fixed plate, a circulating feeding module for conveying incompletely crushed rice particles to the rolling plate is arranged on the outer side of the support seat, a screening module for screening incompletely crushed rice particles is arranged on the inner side of the circulating feeding module, an air supply module for blowing the crushed rice powder in the screening module is arranged below the support seat, and a pre-crushing module for pre-crushing complete rice particles is arranged inside the rolling plate. The invention can pre-crush rice particles, and can subsequently screen out un-powdered rice particles and put them into the grinding area again, so as to immediately perform secondary grinding.

The present invention relates to the technical field of air purification, and specifically discloses an environmentally friendly air purification box, including a box body, wherein the two ends of the box body are respectively provided with an air inlet and an air outlet, and the interior of the box body is sequentially installed with a first filter element, a second filter element, and an axial flow fan from the air inlet to the air outlet, and further includes a first telescopic member for driving the first filter element to slide; a second telescopic member for driving the second filter element to slide; wherein the first telescopic member and the second telescopic member can drive the first filter element and the second filter element to slide synchronously or differentially. The two sides of the second filter element are blocked by a sealing member, and when cleaning, the second filter element is driven to slide by the second telescopic member, so that the second filter element is close to the first filter element, so that the air between the second filter element and the first filter element is discharged from the pores on the first filter element, thereby taking out the dust in the pores of the first filter element, and achieving a self-cleaning effect.

The utility model discloses a chemical reaction kettle for preventing material adhesion, which relates to the technical field of chemical reaction kettles, and comprises a support frame, the inner wall of the upper part of the support frame is fixedly connected with a reaction kettle body, and the inner cavity of the upper part of the reaction kettle body is fixedly connected with a driving assembly. The upper part of the reaction kettle body is fixedly connected with a feeding pipe, the feeding pipe is located on the left side of the driving assembly, and an inner cavity of the reaction kettle body is fixedly connected with a supporting and protecting assembly. According to the chemical reaction kettle capable of preventing the materials from being adhered, the annular sliding rail can stably and quickly rotate in the inner cavity of the annular fixing plate under the action of the steel balls, so that the two L-shaped plates drive the plurality of stirring plates to rotate and stir in the inner cavity of the reaction kettle body under the action of the two fixing rods; meanwhile, uniform stress can be realized, so that loosening and damage caused by long-time stirring and use are prevented.

The utility model discloses an efficient multi-machine-head film blowing machine which comprises a plastic extruding machine, a feeding barrel, a drying and dewatering mechanism, a flow dividing pipe, a forming mechanism, a guide frame, a winding mechanism and an electric heating wire, the feeding barrel communicated with the plastic extruding machine is fixed on the plastic extruding machine, the electric heating wire is fixed in the feeding barrel, the drying and dewatering mechanism extends into the feeding barrel, and the flow dividing pipe is arranged on the flow dividing pipe. The left end of the plastic extruding machine is connected with a flow dividing pipe, the flow dividing pipe is communicated with the two forming mechanisms, a guide frame is arranged above the forming mechanisms, and a winding mechanism is arranged on the ground on the left side of the guide frame. Water in raw materials is fully dried, and the water is prevented from affecting the quality of a follow-up formed film.

The utility model discloses a standby ejection steam source and nitrogen source system for full recovery of damping-down gas, which is characterized in that the gas inlet end of a gas inlet pipeline is connected with a clean gas pipe network, and a buffer tank is arranged at the gas outlet end of the gas inlet pipeline; the damping down ejector is connected with the air outlet end of the buffer tank; the air outlet end of the dry method treatment management device is connected with the air inlet end of the damping down ejector; the air outlet end of the steam pipeline is connected with the air inlet end of the damping-down ejector, and a plurality of diffusing ends are arranged on the steam pipeline; the gas outlet end of the nitrogen pipeline is connected with the gas inlet end of the damping-down ejector, and a plurality of diffusing ends are arranged on the nitrogen pipeline; the gas outlet end of the gas pipeline is connected with the gas inlet end of the damping-down ejector, and a plurality of diffusing ends are arranged on the gas pipeline. The parallel multi-source pipeline is connected with the damping-down ejector, the capability of adapting to various different components, performances and pressure grades is achieved, damping-down diffused gas is recycled as much as possible, meanwhile, the reliability of the damping-down process is guaranteed, and emission of carbon monoxide is reduced.

The invention discloses an air box pulse bag type dust collector with low emission concentration, and relates to the technical field of dust collectors. According to the technical scheme, the low-emission-concentration air box pulse bag type dust collector comprises a supporting assembly, a device body is arranged at the top of the supporting assembly, an input pipe is arranged on the left side of the device body, a discharging assembly is arranged at the bottom of the device body, and a fan exhaust assembly is arranged on the right side of the device body; a pulse valve assembly is arranged on the top left side of the device body. The movement range and the heat radiation range of the heating assembly are effectively expanded, a relatively sealed space is formed when the arc-shaped guide plate makes contact with the V-shaped plate, dust-containing gas is covered and guided, and therefore the dust-containing gas is promoted to approach the movement direction of the heating assembly, the gas drying rate is increased, and the drying efficiency is improved. And the dust is prevented from being adhered to the filter bag assembly due to humidity and is difficult to remove.

A fuel cell nitrogen emission strategy adjustment method and system based on membrane thickness change belong to the field of fuel cells, and the method comprises the following steps: acquiring the real-time thickness of a proton exchange membrane at the current moment, if the real-time thickness is greater than the historical thickness, reducing the opening duration of a nitrogen discharge valve, and if the real-time thickness is less than the historical thickness, increasing the opening duration of the nitrogen discharge valve. According to the present invention, the existing nitrogen removal strategy is adjusted according to the thickness change of the proton exchange membrane, and the proton exchange membrane is thickened, such that the nitrogen permeating from the cathode to the anode is reduced, and the content of the nitrogen accumulated on the anode side is reduced so as to reduce the opening time of the nitrogen removal valve in the nitrogen removal strategy; thinning of the proton exchange membrane indicates that nitrogen permeating from the cathode to the anode is increased, the content of nitrogen accumulated on the anode side is increased, the opening duration of a nitrogen removal valve in the nitrogen removal strategy is increased, and by setting the more reasonable nitrogen removal duration changing along with the thickness of the membrane, it is guaranteed that anode nitrogen is fully discharged, meanwhile, excessive discharge of anode hydrogen is avoided, and the nitrogen removal efficiency is improved. And the reasonability of the nitrogen removal strategy is improved.

The invention discloses a low-damping type matrix overflow-discharging vacuum gypsum mold forming mold and a casting method, the low-damping type matrix overflow-discharging vacuum gypsum mold forming mold comprises a mold body and overflow-discharging capillary tubes, and the overflow-discharging capillary tubes are inserted into the mold body in a sliding mode; the multiple overflow discharging capillary tubes are arranged in an array mode. According to the low-damping type matrix overflow discharging vacuum gypsum mold forming mold and the casting method, the overflow discharging capillary tubes are arranged, so that the overflow discharging capillary tubes and the gypsum mold are combined into a whole in the gypsum mold forming process, the demolding resistance of the gypsum mold is reduced, and the gypsum mold is complete and not prone to being damaged; and in the gypsum mold dewaxing roasting process, the phenomena of overflow hole blockage and crack do not occur, so that the final finished product quality is improved.

The utility model discloses a pulverizer for pulverizing freeze-dried powder, which relates to the technical field of freeze-dried powder production and comprises a barrel body, a top plate of the barrel body is provided with an opening, the bottom of the barrel body is fixedly connected with supporting legs, the top plate is fixedly connected with a feeding hopper, a rotating rod is arranged in the barrel body, and the rotating rod is fixedly connected with the top plate. A first motor is fixedly connected to the top plate, an output shaft of the first motor extends into the barrel body and is connected with a rotating rod, and a plurality of blades are fixedly connected to the rotating rod. The brush plate is arranged, the brush is fixedly connected with the rotating rod, the rotating rod rotates to drive the brush to rotate, so that the screen is cleaned, powder smoothly falls down, meanwhile, the brush plate is arranged at the bottom of the inner cavity of the barrel body to sweep the bottom of the barrel body, the powder falling on the bottom of the barrel body slides to the discharging port, discharging is complete and sufficient, and the screening efficiency is improved. Powder is prevented from remaining at the bottom of the barrel body.