83results about How to "Achieve sieving" patented technology

The invention relates to the technical field of grain size physical detection, in particular to a grain size detection device for granular grains. A grading screening structure for grading and screening particle sizes of granular grains is assembled on the machine body; a grading conveying structure; the corresponding grading screening structure is assembled on the supporting frame; the grading screening structure is provided with a circulating extraction structure corresponding to the grading conveying structure in position. The grading screening structure comprises a screening box fixedly arranged on the supporting frame. According to the multi-stage grain screening device, a multi-stage screening net structure is adopted, and fine screening of granular grains is achieved. A circulating extraction structure is introduced, automatic re-screening of particles which do not pass detection is achieved, the anti-blocking cleaning function of the aperture of a screening net is added, the stability, reliability and application prospects of the system are improved, and the system is suitable for particle size detection of various granular grains, has wide application prospects and is suitable for popularization and application. The method has important application value in the fields of grain processing, storage, transportation and the like.

The invention relates to the technical field of aluminum alloy waste recycling, in particular to a waste aluminum alloy material recycling device and method.The recycling device comprises a cleaning barrel, a screen, a rotating shaft, a cleaning mechanism and a recycling assembly, and the cleaning barrel is filled with cleaning liquid; and a plurality of first blades are arranged on the rotating shaft, each first blade is of a spiral structure, accurate sorting of the aluminum alloy materials is achieved through the screen and screen holes in the first blades, large materials are left in the screen, small materials fall into the bottom of the cleaning cylinder, and the sorting precision is improved. The cleaning mechanism is matched with cleaning liquid and the rotating first blade, it is ensured that materials are thoroughly cleaned in the screening process, the spiral first blade can drive the materials to be conveyed, the situation that the materials are stacked to block the screen is avoided, the overall structure is compact, the space utilization rate is optimized, residual impurities can be further cleaned through the collecting tank and the filter screen, and the screening efficiency is improved. And the use efficiency of the cleaning solution is improved, and aluminum alloy materials meet process requirements.

The utility model discloses a combine harvester thresher for lentils, which comprises a frame, a motor driving component is mounted in the frame, and a self-walking wheel and a steering wheel are mounted on two sides of the bottom end of the frame respectively. Through the arrangement of the threshing and stem-breaking roller, the threshing box, the crushing roller, the group handrail, the threshing cylinder and the threshing nails, the automatic threshing effect is achieved, under the driving cooperation of the conveying belt, harvested hyacinth beans can be effectively conveyed to the threshing and stem-breaking roller, the threshing and stem-breaking roller is composed of the 12-angle crushing roller and the box body, and the threshing effect is good. In the threshing cylinder, the threshing roller is composed of six groups of threshing nails, each group of threshing nails comprises 16 threshing nails, the threshing roller is matched with a threshing shell provided with a transverse threshing cylinder to complete threshing, beans are completely separated from bean shells, and the bean shells, the stems and the leaves and all the beans are sent out from the lower portion of the threshing roller. Therefore, the threshing efficiency is improved.

The invention belongs to the technical field of screening or screening in operation transportation, and particularly relates to a fresh tea leaf lossless screening device and a screening method.The fresh tea leaf lossless screening device comprises a tea leaf containing bin with the upper end open; a horizontal leaf suction partition plate is arranged in the middle of the interior of the tea containing bin, and a plurality of densely-distributed air suction holes are formed in the leaf suction partition plate in a penetrating mode. An air pressure sensor is further arranged below the tea leaf suction partition plate and in the tea leaf containing bin; the bottom wall of the tea leaf accommodating bin is connected with an air suction pump which is used for forming negative pressure below the leaf suction partition plate; the getter pump is in signal connection with a controller for adjusting the operating power of the getter pump; the air pressure sensor is in signal connection with the controller; the tea containing bin is movably connected to a movement mechanism, and the movement mechanism is configured to enable the tea containing bin to be inverted into an inverted state with an opening in the upper end facing downwards from a forward state with the opening in the upper end facing upwards, and enable the tea containing bin in the inverted state to stay at a first position and a second position respectively. During use, damage to fresh tea leaves in the screening process can be effectively reduced.

The invention discloses a radius-adjustable organic fertilizer granulation device, and relates to the technical field of granulators, the radius-adjustable organic fertilizer granulation device comprises a base, the base is fixedly connected with an extruder, one side, close to an outlet, of the extruder is fixedly connected with round rods through nuts, and the round rods are symmetrically distributed along the extruder; a granule extruding disc is horizontally and slidably sleeved between the symmetrically-distributed round rods, a plurality of granule extruding holes in an annular array are formed in the granule extruding disc and used for extruding and forming fertilizer, the granule extruding disc slides on the extruder, the round rods are sleeved with first springs, the two ends of each first spring are in contact with the granule extruding disc and the adjacent nuts respectively, and the first springs are in contact with the granule extruding disc and the adjacent nuts respectively. A motor is fixedly connected to the side, close to the granule extruding disc, of the base. Through adaptive left-right sliding of the granule extruding disc, the output fluctuation of extruding force is adaptively counteracted, and the negative influence of the output fluctuation of the extruding force on organic fertilizer granulation is reduced.

The utility model discloses a screening device for rice processing, which comprises a screening box body, a feeding pipe is arranged at the top of the screening box body, a feeding control structure is arranged at the feeding pipe, a first-stage screen, a second-stage screen and a guide slope are sequentially arranged in the screening box body from top to bottom in an inclined manner, and vibration motors are arranged on the first-stage screen and the second-stage screen. An air blowing pipe is arranged at the top end of one side of the screening box body, an air blower is arranged on the air blowing pipe, a dust collecting structure matched with the air blowing pipe is arranged on the other side wall of the screening box body, discharging pipes matched with the first-stage screen, the second-stage screen and the guide slope are arranged on the side wall of the screening box body, and centrifugal impellers are rotationally installed in the discharging pipes through bearings; a centrifugal impeller is arranged in the screening box body, a first motor is arranged in cooperation with the centrifugal impeller, at least two sets of installation frames are arranged on the outer side of the screening box body, belt type conveying structures are arranged on the installation frames, dust, chippings, pebbles and the like in rice can be classified and screened, and the screening effect in the rice processing process is improved.

The utility model relates to the field of organic fertilizer production, in particular to organic fertilizer extrusion granulation equipment. The organic fertilizer extrusion granulation equipment comprises a supporting base, an extrusion granulation device and a discharging device are installed at the upper end of the supporting base, and a discharging opening facing the position of the discharging device is formed in the side portion of the extrusion granulation device; a feeding pipe which is obliquely arranged is mounted at the side part of the extrusion granulation device; a feeding hopper is mounted at one end, close to the lower position, of the feeding pipe; an inclined vibrating screen plate is installed in the discharging device, and at least two kinds of leakage holes with different hole diameters are formed in the vibrating screen plate. According to the organic fertilizer extrusion granulation equipment provided by the utility model, the vibrating screen plate arranged in the blanking device is inclined, so that particles with different sizes can be screened when all particle raw materials are loaded and unloaded on the vibrating screen plate, and the screening effect is better.

The utility model discloses a stirring device for mixing chemical raw materials, which belongs to the technical field of chemical raw material processing, and comprises a frame body, a stirring barrel is connected onto the frame body, a discharge port is arranged below the stirring barrel, a receiving box is connected into the frame body, a screening device is connected onto the stirring barrel, a crushing device is connected onto the stirring barrel, and the crushing device is connected with a discharging port. And the screening device is connected to one side of the crushing device. According to the stirring device for mixing the chemical raw materials, the fixed plate, the connecting hopper, the rotating shaft, the crushing rollers, a motor, a connecting plate and a gear are arranged, the rotating shaft drives the gear to rotate, then the gear drives the other gear to rotate, the two crushing rollers rotate at the moment, and the raw materials fall into the stirring barrel after passing through the crushing rollers; therefore, the raw materials are crushed before being fed, and the problems that large-particle raw materials are difficult to fully disperse in the stirring process, mixing is uneven, and the chemical reaction efficiency and the product uniformity are affected are solved.

The utility model discloses a screening device for a nut fruit color sorter, which comprises a screening machine shell, a plurality of screening channels are arranged in the screening machine shell, the screening machine shell is rotatably connected with an upper rotating shaft and a lower rotating shaft which penetrate through each screening channel, and a conveying belt which is rotatably connected with the two rotating shafts is arranged in each screening channel. A plurality of material blocking strips are fixedly connected to the conveying belts, a plurality of through holes are formed in the conveying belts, a connecting frame is fixedly connected to the lower end face of the screening machine shell, a plurality of jet machines are fixedly connected to the lower end face of the connecting frame, and each jet machine is fixedly connected with a jet cylinder which penetrates through the connecting frame and is located on the lower side of one row of conveying belts in the screening channel. And the left side of the screening machine shell is fixedly connected with a bad fruit screening frame, the bad fruit screening frame is fixedly connected with a first discharging plate for discharging bad fruits, the bad fruit screening frame and the screening machine shell are fixedly connected with a good fruit screening frame, and the good fruit screening frame is fixedly connected with a second discharging plate for discharging good fruits.

The invention discloses closed ore crushing equipment capable of preventing dust from overflowing, and belongs to the technical field of ore processing, the closed ore crushing equipment comprises a bin body, side baffles are fixedly connected to the two sides of the upper portion of the bin body, and a fixing sleeve is fixedly connected to the upper portion of the bin body; a rotating main synchronizing wheel can pull a hinge rod to deflect, and then a sliding plate is pushed and pulled back and forth through the hinge rod, so that the sliding plate pushes and extrudes a traction rod through the chute wall of a chute, the traction rod drives a connecting rod to rotate through a fixed plate, and a spraying head can swing back and forth around the connecting rod; water supply components such as a faucet, a water tank and a water pump are externally connected to the external hose, stable input of a water source is achieved, water flow enters the spraying head through the external hose and is atomized or shunted by spraying holes of the spraying head to form uniform water mist, ore in the storage cavity is wetted, dust generated by crushing is subjected to dust falling treatment, and the ore crushing efficiency is improved. Dust diffusion and flying are inhibited, and the dust is prevented from polluting the working environment and harming the body health of operators.

The utility model discloses grinding equipment for ceramic raw materials, which comprises a grinding box, two sides of the bottom end of the grinding box are fixedly connected with support frames, and two sides of the top end in the grinding box are fixedly connected with material guide inclined plates. According to the grinding equipment for the ceramic raw materials, by arranging the first grinding cylinder, when the raw materials are ground, a second driving motor is started to drive a set of transmission gears to rotate, and the two sets of transmission gears are in meshed transmission to drive two sets of driving shafts and the second grinding cylinder outside the driving shafts to synchronously and oppositely rotate; meanwhile, a driving shaft drives two groups of transmission shafts to rotate through a second chain wheel and a second chain, and the transmission shafts drive two groups of first grinding cylinders to oppositely rotate, so that the raw materials enter from the top of the grinding box, pass through the two groups of first grinding cylinders to be ground, and then pass through the two groups of second grinding cylinders with a smaller distance to be ground; the grinding effect can be improved, and the problem that the grinding effect is poor is solved.

The utility model relates to collagen extraction technical field especially, it is raw material crusher for animal collagen extraction, including the rubbing crusher box and the crushing box, be provided with crushing subassembly in the crushing box, and the crushing box bottom is provided with the screening net of inclination, the screening net bottom is provided with vibration subassembly, is provided with rubbing subassembly in the rubbing crusher box. The utility model discloses through crushing subassembly to the raw material preliminary crushing processing, and the raw material after crushing part that meets the particle size requirement falls into the screening cylinder through the mesh of screening net, at this moment, the rubbing motor drives rubbing axle direct current and the reverse rotation staggered rotation of starting rubbing, and then drive rubbing blade rotation to the crushing raw material carries out secondary rubbing processing, repeatedly under the action of centrifugal force, the raw material is broken and thrown to the inner wall of screening cylinder, wherein the particle size that meets the standard passes through the screening hole on the screening cylinder, and the one that does not meet is in the direct current and the reverse rotation of rubbing blade, the rubbing process of pulling, until the particle size meets, thereby ensuring that the particle size of final raw material is uniform.

The present invention relates to the technical field of PBT production, and discloses a screening device for PBT production, comprising a collision-type vibration mechanism, a plurality of vortex screening mechanisms and an elastic connection mechanism. The screening device for PBT production utilizes the vibration phenomenon generated by metal during collision, so that PBT plastic presents a vortex downward movement in a vortex housing under vibration and its own gravity, and screening is achieved according to its own size during the vortex downward movement. The vibration is generated by lateral collision, so the PBT plastic will not be separated from the vortex housing, thereby effectively improving the effective screening time of the PBT plastic in the vortex housing, thereby improving the screening efficiency. In addition, since the vortex housing is in a vortex state, the screening stroke of the PBT plastic in a unit volume can be effectively improved.

The utility model discloses a suspension type density screening device which comprises a frame, a dust removal box is fixed to the upper end of the frame, a windmill swing bed is arranged in the frame, a guide pipe is fixed to the upper end of the windmill swing bed and communicated with the dust removal box, and the front end and the rear end of the windmill swing bed are rotationally connected with two symmetrical connecting rods respectively. One end of the connecting rod is rotationally connected with the windmill swing bed, the other end of the first motor is rotationally connected with the frame, a light material outlet is fixed to the left end of the windmill swing bed, a heavy material outlet is fixed to the right end of the windmill swing bed, wind power is generated through the fan blades, and air is exhausted through the ventilation holes and the through holes in the upper ends of the air guide strips. Light materials at the upper end of the sieve plate can be blown up and discharged from a light material outlet, a windmill swing bed is driven by a second motor and a two-connecting rod to swing, heavy materials at the upper end of the windmill swing bed are toggled up, gradually move towards a heavy material outlet and are discharged through the heavy material outlet, and then screening of the materials is achieved. And meanwhile, noise is reduced.

The utility model discloses a kind of material screening and grinding components, including sequentially communicating material bucket, material temporary storage section, rotary valve, material conveying section, three-way valve, screening element or grinding element, three-way pipe, and material collector, wherein three-way valve includes three-way valve feed inlet, valve core, three-way valve first discharge port and three-way valve second discharge port, three-way valve feed inlet is communicated with the discharge port of material conveying section, three-way valve first discharge port is communicated with screening element, three-way valve second discharge port is communicated with grinding element, three-way pipe includes three-way pipe first feed inlet communicated with screening element, three-way pipe second feed inlet communicated with grinding element, three-way pipe discharge port communicated with material collector. The utility model provides a kind of material screening and grinding components, both can realize screening to material (especially high active material), can also realize grinding to material, and satisfy the environmental requirement of high active material processing, screening or grinding is all operated under closed environment, production efficiency is high, suitable for industrial large-scale production.

The utility model relates to the technical field of crushers, and discloses a crushing device for metal processing, which comprises a base, the two ends of the top of the base are slidably connected with supporting plates, the upper parts of the two supporting plates are fixedly connected with a box body, the top of the box body is fixedly connected with a crushing assembly, and the interior of the box body is fixedly connected with a sieve plate. A discharging port is formed in the middle of the box body, a mounting plate is further fixedly connected to the upper portion of the supporting plate, a first sliding groove, a second sliding groove and a limiting groove are formed in the middle of the mounting plate, a lifting assembly is fixedly connected to the outer side of the mounting plate, and a threaded block is installed on the outer side of the lifting assembly. According to the silicon powder crushing device, crushed silicon powder can be sieved through the sieve plate, and then through the cooperation of the lifting assembly, the sliding block, the notch and other structures, the larger silicon powder can be conveyed into the box body again and can be crushed again, so that the subsequent steps are reduced, and the crushing efficiency is improved.

The utility model relates to a coal dressing device, in particular to combined type coal dressing equipment. After coal is screened by traditional combined coal preparation equipment, pulverized coal falls on a conveying plate, and water is added in the coal screening process to reduce dust raising, so that the pulverized coal is easily accumulated on the conveying plate, and then discharging is unsmooth. The device comprises a protective shell, the outer side of the protective shell is fixedly connected with a right supporting shell, the outer side of the right supporting shell is fixedly connected with a motor through a support, the output end of the motor is fixedly connected with an eccentric rotating disc, the side face of the eccentric rotating disc is rotatably connected with a supporting shaft, and the upper end of the supporting shaft is slidably connected with a connecting sliding block; the side face of the connecting sliding block is fixedly connected with a right vibration supporting plate. The eccentric rotating disc drives the supporting shaft to reciprocate, so that the connecting sliding block drives the right vibration supporting plate to reciprocate, the screening plate is driven to reciprocate, and coal mine screening by the screening plate is achieved.

The utility model relates to the technical field of arsenic-removed ammonium polyphosphate production equipment, in particular to an arsenic-removed ammonium polyphosphate production device, which comprises an arsenic-removed reactor and a polymerization reactor, one side of the polymerization reactor is connected to the bottom discharge end of the arsenic-removed reactor through a pipeline, the bottom output end of the polymerization reactor is connected with a cooler, and the cooler is connected with the arsenic-removed reactor through a pipeline. The output end of the cooler is connected with a crusher through a product conveying belt, the output end of the top of the polymerization reactor is connected with a plate-type absorption tower through a pipeline, the output end of the plate-type absorption tower is sequentially connected with a first-stage absorption tower, a second-stage absorption tower and a third-stage absorption tower, and one side of the top of the polymerization reactor is connected with a second reactant storage tank through a pipeline. According to the arsenic-removed ammonium polyphosphate production device, the arsenic removal reactor and the polymerization reactor are combined, so that efficient removal of arsenic in the ammonium polyphosphate production process is realized. According to the device, the operation process is simplified, the production cost is reduced, and the quality and the safety of products are remarkably improved.

The utility model relates to the technical field of cement production and manufacturing, in particular to a three-way flap valve which comprises a valve body main path (1). The valve body main path (1) is connected with a valve body branch path (2); a screen structure is arranged at the end part of the valve body main path (1); a turning plate structure is arranged between the valve body main path (1) and the valve body branch path (2); the screen structure is matched with the turning plate structure, so that materials with different granularities can be screened by the device; the size and the diameter of materials of the valve body branch can be controlled within a fixed range, and large-particle materials are discharged from the valve body main path.

The utility model discloses a filtering device for sand processing, which relates to the technical field of material processing and comprises a filtering box, a screening mechanism is arranged in an inner cavity of the filtering box, a mounting mechanism is arranged in the screening mechanism, and the screening mechanism comprises a fixing block fixedly mounted on the inner wall of the filtering box. A fixing hole is formed in the surface of the fixing block, a fixing bolt is in threaded connection with the inner side of the fixing hole, a mounting frame sleeves the outer side of the fixing bolt, a filter screen is arranged at the top of the mounting frame, and the filter screen is fixedly connected with the mounting frame through a mounting mechanism. According to the sand processing and filtering device, due to the arrangement of the mounting mechanism, the filter screen is more convenient and rapid to clean and maintain, blockage can be effectively prevented, the filtering efficiency is improved, the service life of equipment is prolonged, the maintenance time and cost can be saved, and the downtime of the equipment is shortened, so that the production efficiency and the product quality are improved.

The screening mechanism comprises a shell and a screening assembly embedded in the shell, the screening assembly comprises a fixed plate and a rotary hopper which are coaxially distributed up and down, the fixed plate is welded in the shell in the horizontal plane direction, a servo motor is assembled at the top of the fixed plate, and a rotary shaft is arranged on the rotary hopper. The utility model relates to the technical field of medicine production. According to the screening mechanism for the pharmaceutical production auxiliary materials, the screening assembly is arranged in the shell, the rotating hopper and the screen can be driven to rotate by means of the servo motor installed on the fixing plate, and therefore the auxiliary materials can be effectively screened on the screen, meanwhile, the inner baffle is arranged at the bottom of the fixing plate, on one hand, the inner baffle covers the shaft rod, and on the other hand, the screening effect is good. And on the other hand, a plurality of grinding rollers rotationally installed below the fixing plate are matched, auxiliary materials which do not pass through the screen mesh can be ground, the functionality of the equipment is improved, and the machining efficiency is improved.

The utility model discloses a machine tool chip removal device, which relates to the field of machine tools, and comprises a box body, one side of the box body is movably hinged with a hinged shaft door through a hinge, the upper side of the box body is provided with a feeding hollow block, and the box body is internally provided with a screening and collecting mechanism and an extruding mechanism. The screening and collecting mechanism comprises a first spring and a second spring which are fixedly connected into the box body, and the problems that when the chippings are collected into the box body, the box body cannot classify metal and nonmetal in the chippings, workers need to conduct follow-up manual screening, the box body cannot extrude the chippings into blocks, and the working efficiency is high are solved. The problems that when the box body collects scraps, the collecting amount is not high, and the collecting efficiency of the scraps is reduced are solved, through arrangement of a screening and collecting mechanism in the device, after the scraps are poured into the box body, screening of metal scraps and non-metal scraps can be achieved while the scraps are collected, and therefore the collecting efficiency of the scraps is improved. And meanwhile, non-metal chippings can be effectively and uniformly collected.

The utility model relates to the technical field of batching devices, and discloses a fertilizer production batching device which comprises a base, the top of the base is fixedly connected with a collecting box, the front side and the rear side of the collecting box are fixedly connected with first motors, and the driving ends of the first motors are fixedly connected with circular plates. Fixing columns are fixedly connected to the sides, far away from each other, of the two circular plates, rotating rods are rotatably connected to the outer portions of the fixing columns, sliding blocks are rotatably connected to the left sides of the rotating rods, connecting rods are rotatably connected to the tops of the sliding blocks, and a filtering box is rotatably connected to the tops of the two connecting rods; supporting columns are fixedly connected to the four corners of the top of the base. According to the utility model, the screening of the fertilizer is realized, so that the product quality is improved, the effect and the use value of the fertilizer are improved, the wall scraping of the stirring barrel is realized, the abrasion and blockage risks of the equipment are reduced, and the maintenance and cleaning frequency of the equipment is reduced.

This utility model discloses an ultrasonic sprue separator, belonging to the technical field of sprue separation equipment. It includes a sprue separator body, a feeding hopper mounted on the sprue separator body, and a discharge hopper connected to the top of the feeding hopper. The bottom of the feeding hopper has two sets of through holes, and the interior of each through hole is sequentially equipped with a first filter screen and a second filter screen for screening debris and waste. The bottom of the feeding hopper and the discharge hopper are equipped with vibration components for screening and discharging. A limiting baffle is connected to the top of the feeding hopper, and an assembly plate is movably connected to one side of the limiting baffle. A dust removal component for cleaning dust is installed on the surface of the assembly plate. This utility model can remove debris and dust mixed in with the product during the sprue separation and conveying process, effectively improving production efficiency and ensuring product quality.

The utility model relates to the technical field of screening equipment, and provides electromagnetic excitation screening equipment which is characterized in that a screen is arranged on a screen box; the first beating piece is arranged on the screen box in a relatively rotating mode and located below the screen, and the included angle between the first beating piece and the screen is alpha; the second beating piece is arranged on the screen box in a relatively rotating mode and located below the screen, the included angle beta between the second beating piece and the screen is larger than alpha and smaller than 90 degrees; the vibration exciter is arranged on the screen box and provided with an output rod used for reciprocating vibration excitation, and the output rod is in transmission connection with the first striking piece and the second striking piece and used for driving the first striking piece and the second striking piece to rotate and strike the screen. By means of the technical scheme, the screen cloth can vibrate up and down and can also generate certain inclined vibration, the vibration mode is beneficial to better layering and through screening of fine-grain materials on the screen face, and the screening efficiency can be greatly improved.

The utility model relates to the technical field of sieving, and discloses a large-particle-size material sieving device at a transmission junction of an asphalt concrete mixing plant, which comprises a bottom plate, a sliding rail is fixedly connected to the top of the bottom plate, a mounting frame is fixedly connected to the top of the bottom plate, and a sieving box is slidably connected to the top of the sliding rail. A first discharging plate is fixedly connected to the side wall of the screening box, a second discharging plate is fixedly connected to the side wall of the screening box, a screening plate is arranged in the screening box and connected with the screening box through a fixing mechanism, and a reciprocating mechanism is arranged on the side wall of the mounting frame. The motor drives the belt wheel, further drives the rotating shaft and drives the rotating disc to rotate, the connecting plate is driven by the rotating disc to drive the screening box to move back and forth on the sliding rail, material screening is achieved, qualified materials fall into the lower portion through the screening plate and are fed into the drying cylinder through the inclined belt, and disqualified large-block materials are discharged through the first discharging plate. Through cooperation of the structures, precise separation is achieved, and the product quality is improved.

The utility model belongs to the field of spice processing equipment, in particular relates to hericium erinaceus edible spice grinding equipment, and aims to solve the problems that when the existing hericium erinaceus edible spice grinding equipment is used, qualified ground materials and unqualified ground materials are accumulated in a grinding groove of the hericium erinaceus edible spice grinding equipment in the grinding process, the materials are inconvenient to screen, the grinding of the unqualified materials is influenced, the processing efficiency is reduced, and the processing cost is reduced. In order to solve the problem that maintenance cost is increased due to the fact that the structure is complex, according to the scheme, the grinding device comprises a shell, a driving mechanism, a grinding mechanism and first threaded rods, a supporting frame is fixedly connected to the bottom of the shell, the driving mechanism is arranged on the supporting frame, and the shell is in threaded connection with the two first threaded rods. According to the utility model, through the cooperation of all the components, not only can ground materials be screened in the grinding process, but also the grinding degree of the materials can be adjusted, the structure is simple and convenient, and the practicability is higher.

The invention discloses a porous composite membrane as well as a preparation method and application thereof. The porous composite membrane comprises an ion conduction layer and a high-strength layer; the thickness of the ion conduction layer is 30-70 [mu] m; the thickness of the high-strength layer is 4-15 microns; and the thickness of the porous composite membrane is 34-85 [mu] m. And the high-strength layer can further screen protons and metal ions, so that the coulombic efficiency of the battery is further improved. The membrane has excellent chemical stability, and provides a new direction for the design of a high-performance membrane of a flow battery. The preparation method is simple and easy to implement, and mass production is easy to realize. And the high-strength layer is not easy to fall off and has excellent mechanical properties.