6results about How to "Play a screening role" patented technology

The utility model discloses a recycled plastic product recovery device, and belongs to the technical field of recovery. The recycled plastic product recycling device comprises a recycling box, extending plates are fixedly connected to the front portion and the rear portion of the upper portion of the outer wall of the recycling box, a gear column is rotationally connected between the two extending plates, and a screening mechanism is arranged in the recycling box. The screening mechanism comprises a grid frame located on the upper portion of the interior of the recycling box, a gear column rotates to drive a plurality of gear blocks meshed with the two fixing plates and the fixing plates to rotate synchronously, and then the grid frame is driven to rotate. The rotation of the grid frame can drive the internal plastic product to synchronously turn over, when the plastic product rotates to a high position along with the grid frame, the plastic product falls to the blade set due to gravity, the plastic product moving irregularly can make full contact with the blade set through turning over, the cutting comprehensiveness of the blade set is improved, the plastic product is cut more evenly, and the cutting efficiency is improved. And each plastic product can be effectively treated.

The utility model relates to the technical field of feeders, in particular to an adjustable vibrating feeder for gravel processing, which comprises a hopper and a bottom plate, a plurality of strip-shaped through holes are arranged at the middle end inside the hopper, and mounting grooves are arranged inside the strip-shaped through holes. The grating plate is driven to slide on the guide sliding rod, so that the material passing area of the strip-shaped through hole is changed, fine adjustment of the material flow is achieved, and the grating plate can further play a certain screening role and control the discharging granularity. Through a connecting plate, a connecting rod and a discharging baffle in the buffering mechanism, the speed of materials flowing out of a discharging port of the hopper can be reduced, impact of the materials on equipment below is reduced, the equipment is protected, and the service life of the equipment is prolonged; the height and the angle of the hopper can be adjusted according to needs through the hydraulic cylinder so as to adapt to different working environments and material characteristics, the material conveying process can be optimized, and the production efficiency can be improved.

The utility model relates to the technical field of high-pressure roller mills, and discloses a feeding device of a high-pressure roller mill, which comprises a feeding assembly, a screening assembly capable of screening and guiding is arranged in the feeding assembly, the screening assembly comprises a fixed plate, and a conveying device capable of conveying and screening is arranged on the side surface of the fixed plate. A restraining plate capable of scraping materials is arranged on the side face of the conveying device. According to the conveying device, iron products falling on the side face of the conveying device and in materials are magnetically attracted by a crawler belt of the conveying device, meanwhile, the conveying device circularly moves, the iron products move to the position of the restraining plate along with the conveying device, and the restraining plate shovels the iron products to the side face of the conveying device to the interior of the material collecting plate to be collected; the other materials fall to the next layer along with the movement of the conveying devices and are screened on one side through the other conveying device, metal iron products in the materials are removed, in this way, the screening effect is achieved during feeding, and damage to a roller sleeve after iron feeding is avoided.

The utility model belongs to the technical field of tobacco shred processing, and discloses a tobacco shred winnowing and impurity removing device which comprises an impurity removing box and an impurity removing mechanism. The impurity removing mechanism comprises a filtering assembly, a sweeping assembly and a driving assembly, the filtering assembly comprises a first filter screen and a second filter screen, the sweeping assembly comprises a straight rod and a plurality of cross rods, the cross rods are located above the first filter screen and the second filter screen, and the driving assembly is connected with the straight rod to drive the cross rods to move in a reciprocating mode. By arranging the impurity removing mechanism, tobacco shreds are evenly distributed and distributed, middle and lower layer impurities are exposed to one side of the blowing assembly, the winnowing efficiency of the blowing assembly is improved, the screening effect is achieved, tobacco shred impurities are filtered more finely, the material purity is improved, and the finished product quality is guaranteed.

The application provides a method for preparing a defect-free MOF membrane by a MOF gradient distribution seeding method. According to the fact that the density of ZIF-8 seeds is greater than the density of a polymer solution, a gradient distribution of the ZIF-8 seeds in a phase inversion membrane is obtained, and abundant nucleation sites are provided for subsequent ZIF-8 layer growth. The distribution of the ZIF-8 seeds in the membrane holes increases the rigidity of the phase inversion base membrane, and simultaneously increases the adhesion of the surface of the base membrane and the ZIF-8 layer. The addition of tannic acid in the ZIF-8 precursor solution assists the growth of the ZIF-8 layer, the tannic acid has abundant hydroxyl groups, provides CO2 groups, and improves the selectivity of the membrane for separating H2 / CO2. The ZIF-8 seeds in the compact defect-free ZIF-8 membrane rich in hydroxyl groups have a gradient distribution, which improves the mechanical properties of the base membrane and the adhesion of the ZIF-8 layer, and the ZIF-8 membrane prepared by directly seeding ZIF-8 seeds on the base membrane shows obvious superiority.

The utility model relates to the technical field of pcb, in particular to pcb assembly equipment which comprises a support, the inner side of the support is in transmission connection with a conveying belt through a rotating shaft, the conveying belt is fixedly connected with a clamping mechanism, and the support is fixedly provided with a dust removal mechanism. A telescopic rod is fixedly connected to the support, a sorting rod is rotationally connected to the top of the telescopic rod, the telescopic rod rotationally connected with the sorting rod can stretch out and draw back up and down so that the screening height can be conveniently adjusted, an output rail is placed under the sorting rod, and the output rail is fixedly connected to the outer side of the support. And the dust removal mechanism comprises a supporting rod, the supporting rod is fixedly connected to the top of the support, the top end of the supporting rod is fixedly connected with a dust removal assembly, the top of the dust removal assembly is fixedly connected with a housing, and through blocking of the sorting rod, the effect of screening the unqualified pcb is achieved.