38results about How to "Realize hierarchical screening" patented technology

The invention relates to a stagewise drum screen device for sand grading separation, belongs to the technical field of processing building materials and aims at solving the technical problems how to realize grading screening of sand grading separation and rapid change of a screen mesh. The stagewise drum screen device for sand grading separation comprises a rack, a rotary shaft, a drive part used for driving the rotary shaft to rotate, a drum frame and a plurality of screen mesh components used for screening sand stones in a grading manner, wherein the rotary shaft is rotationally connected to the rack; the drum frame sleeves and is fixedly connected with the rotary shaft; a plurality of openings which are sequentially formed in the axial direction of the rotary shaft are formed in the side surfaces of the drum frame; and the screen mesh components are detachably connected to the drum frame and in addition covers the corresponding opening. According to the stagewise drum screen device for sand grading separation, each screen mesh component has the advantages of very convenience in disassembling, easiness in cleaning and changing, capabilities of reducing dusts and protecting workers from being hurt by splashing sand grains and convenience in changing the screen mesh components.

The invention relates to a sorting device, and aims to provide a tea roller sorting device, which has the advantages of the simple and reliable structure and good screening effect, is capable of effectively improving the sorting efficiency and meets the sorting level requirements of most tea varieties. The tea roller sorting device is characterized by comprising sorting barrels, a power mechanismand a discharging mechanism; and the sorting barrels are respectively arranged on a support table and can rotate around a horizontal axis, the power mechanism is used for driving the sorting barrels to rotate, the discharging mechanism is used for collecting tea, the sorting barrels are formed in a way that a plurality of subsections are axially connected, flexible screening nets are arranged on the barrel walls of the subsections, a plurality of spiral plates are arranged on the inner circumferential surface of the barrel walls, and the aperture of the screening net of the right subsection isgreater than that of the screening net of the left subsection in two adjacent subsections.

The invention relates to a fruit screening and conveying production line and a technological process thereof. The fruit screening and conveying production line comprises a rack, the rack is provided with a cleaning assembly and a spiral conveying disc, the diameter of the spiral conveying disc is gradually increased from top to bottom in the height direction, the spiral conveying disc comprises an outer ring plate, a bottom plate and an inner ring plate, and the spiral conveying disc is provided with a feeding port and a discharging port. A plurality of through openings are formed in the bottom plate, the diameters of the through openings are gradually increased from the end close to the feeding port to the end away from the feeding port, a discharging pipe is fixedly connected to the lower portion of the bottom plate, a first collecting box is connected to the discharging pipe, a second collecting box is arranged below the discharging port, strip-shaped grooves are formed in the positions, close to the through openings, of the bottom plate, and a shifting assembly is fixedly connected to the inner ring plate. The shifting assembly comprises a positioning plate, a first motor and a cam, and the cam is matched with the strip-shaped grooves. By arranging the spiral conveying disc and the multiple through openings, fruits are screened in a classified mode according to the sizes of the fruits, and the screening effect on the fruits is good.

The invention discloses a high-efficiency water-based paint filtering device which comprises a machine casing, a base, a swinging device, a machine casing second driving motor, an eccentric gear, a stopping block, a filter screen A and an impurity box A, wherein the swinging device is arranged under the base, the eccentric gear is arranged on the second driving motor, a limit block is arranged onthe lower side of the eccentric gear, a slide rod is fixedly arranged on the limit block, the lower end of the slide rod is arranged in the machine casing and fixedly connected with the stopping block, and the filter screen A and a filter screen B are obliquely arranged in the machine casing. The eccentric gear is driven by the second driving motor to rotate, so that the stopping block and the feeding opening can be separated intermittently; thus, water-based paint can be fed at intervals, feeding too many materials is prevented, and plug in filtering is avoided; the first driving motor can drive a movable plate to move left and right, so that the machine casing on the base can move left and right to improve a filtering speed; the filter screen A and the filter screen B are arranged in themachine casing to achieve classified screening and improve purity of the water-based paint.

The invention discloses a construction waste sieving device. The construction waste sieving device comprises a supporting frame, a cylinder is internally provided with a second sieving meshed cylinderand a first sieving meshed cylinder, wherein the first sieving meshed cylinder is located in the second sieving meshed cylinder; and a rotating shaft is arranged at the upper end of a transverse plate, the top end of the rotating shaft is connected with a supporting plate through a bearing seat, the left side of the supporting plate is welded to the supporting frame, and an electromotor is installed at the left end of the top of the supporting plate. The electromotor is started to drive a first transmission belt wheel to rotate, due to the action of centrifugal force, when the particle size of construction waste brick residues in the first sieving meshed cylinder is smaller than the mesh diameter of the first sieving meshed cylinder, the construction waste brick residues with small particle size are thrown into the second sieving meshed cylinder; and when the particle size of the construction waste brick residues dropping into the second sieving meshed cylinder is smaller than the mesh diameter of the second sieving meshed cylinder, the construction waste brick residues are thrown into the cylinder; and the graded sieving of the construction waste brick residues can be realized byarranging the first sieving meshed cylinder and the second sieving meshed cylinder.

The invention discloses a river sand screening device for a building. The river sand screening device comprises a barrel. A feeding hopper is arranged at the upper end of the barrel, the lower end ofthe feeding hopper penetrates through the side wall of the barrel and extends into the barrel, and the inner wall of the feeding hopper is fixedly connected with a primary screening net. The upper endthe barrel is fixedly connected with a first supporting seat, and a U-shaped groove is formed in the first supporting seat. A fixing rod is fixedly connected to the side wall of the feeding hopper, and the end, away from the feeding hopper, of the fixing rod is fixedly connected with a rotary shaft. A supporting plate is fixedly connected to the side wall of the feeding hopper, and the supportingplate and the fixing rod are symmetrical. A second supporting seat is fixedly connected to the upper end of the barrel, and the second supporting seat and the first supporting seat are symmetrical. Afirst motor is fixed to the second supporting seat. The river sand screening device is simple in structure, grading screening can be achieved, the time and labor are saved, the screening efficiency is high, and river sand which does not pass through the screening net can be poured out easily after screening.

The invention discloses a pellet sorting device. The pellet sorting device comprises a rack, wherein a shell is installed on the rack; a primary sorting device and a secondary sorting device are installed in the shell; and a driving device is installed on the rack, a power conversion assembly is installed on the shell, and the power conversion assembly is used for distributing power generated by the driving device to the primary sorting device and the secondary sorting device. According to the pellet sorting device, the primary sorting device is coordinated with the secondary sorting device, so that grading screening of pellets is realized, the pellets with the large diameter and the small diameter are screened out, and therefore the size of the pellets is ensured, and production cost of the pellets is saved; and power is supplied to work of the primary sorting device and the secondary sorting device through the power of the driving device, so that manufacturing and using cost of the device is reduced.

The invention discloses a roller type fresh leaf screening machine for making tea. The roller type fresh leaf screening machine comprises a lifter, a vibratory feeder, a combined roller screen and a driving mechanism. The combined roller screen is provided with a frame and four roller screen bodies, wherein the four roller screen bodies are each of a cylindrical structure, each roller screen body is divided into four layers which are sleeved from inside to outside, the lengths are gradually reduced from inside to outside, and the diameters are gradually increased from inside to outside. The four roller screen bodies are different in screen hole size, the size of screen holes at the innermost layer is the largest, and the sizes of screen holes are reduced from the innermost layer to the outside layer by layer. The four roller screen bodies are overlapped, fresh leaves are screened according to different features of single buds, one bud with one leaf, one bud with two leaves, one bud with three or four leaves, and single pieces, and thus graded screening of the fresh leaves is achieved. A variable-frequency motor is adopted to achieve stepless regulation, and the roller type fresh leaf screening machine is simple in structure, easy to operation and suitable for application and popularization.

The invention discloses separation equipment and method for micro-plastic in plateau lake sediments. The separation equipment comprises a separation cylinder, wherein the top surface of the separation cylinder is open, an end cover is detachably connected to the top surface of the separation cylinder, a stirring device is arranged on the end cover, a vent hole and a feeding hole are formed in the top surface of the end cover, and a centrifugal device is arranged in the end cover; the centrifugal device comprises a rotating mechanism, the rotating mechanism is arranged at the bottom of an inner cavity of the separation cylinder, a centrifugal plate is fixedly connected to the top surface of the rotating mechanism, a first sealing bearing is arranged between the peripheral wall of the centrifugal plate and the inner wall of the separation cylinder, a liquid storage cavity is formed between the bottom surface of the centrifugal plate and the bottom of the inner wall of the separation cylinder, a centrifugal cylinder is fixedly connected to the center of the top surface of the centrifugal plate, a plurality of liquid outlet holes are formed in the top of the centrifugal cylinder at equal intervals in the circumferential direction, a plurality of filtering mechanisms are sequentially arranged outside the centrifugal cylinder in a sleeving mode, the inner cavity of the centrifugal cylinder is divided into a plurality of filtering cavities by the filtering mechanisms, a plurality of liquid discharging holes are formed in the centrifugal plate, and the filtering cavities communicate with the liquid storage cavity through the liquid discharging holes; and a plurality of water discharging mechanisms are arranged on the bottom surface of the centrifugal plate at equal intervals in the circumferential direction.

The invention particularly relates to a primary screening and grading device for plastic particles. The primary screening and grading device comprises a screening plate and supporting rods, wherein the supporting rods are arranged under the screening plate; the screening plate is obliquely arranged and comprises a first screening area, a second screening area and a third screening area; a plurality of screen holes are formed in each of the first screening area, the second screening area and the third screening area; the first screening area is located at the higher end of the screening plate;the third screening area is located at the lower end of the screening plate; the second screening area is located between the first screening area and the third screening area; the diameter of the screening holes in the first screening area is smaller than the diameter of the screening holes in the second screening area; and the diameter of the screening holes in the second screening area is smaller than the diameter of the screening holes in the third screening area. The device has the advantages of being simple in overall structure, low in cost, capable of preliminarily realizing grading andscreening of the plastic particles and simple and convenient in operation.

The invention discloses a jujube picking machine which comprises a power source, a transmission device, a picking device, a fruit conveying device, a screening device, a collecting device and a stretchable device. The power source is placed at the bottom of the collecting device, the screening device is installed at the top of the collecting device and connected with the bottom of the picking device through the fruit conveying device, the stretchable device is fixedly installed at the bottom of the picking device, and the transmission device is installed at the bottom of the picking device. Byadopting the jujube picking machine, in the jujube picking process, adaptability adjustment is performed for branches of different sizes, picked jujubes are directly collected, screening and gradingcan be completed according to the sizes of jujubes, and therefore the picking efficiency is improved.

The invention is applicable to the technical field of construction equipment, and provides a gravel sorting device for construction. The sorting device comprises a coarse screen, a rotating roller, aseparating screen box and a fine screen, the coarse screen is mounted at a top opening of the separating screen box and is of an arc-shaped structure; the rotating roller is mounted at the upper part,corresponding to the coarse screen, of the separating screen box; mounting positions for hinging and mounting a hopper are arranged on the rotating roller at equal intervals; the hopper comprises atleast one mixing hopper and at least one shoveling hopper; and a plurality of open slots are formed in a hopper body of the mixing hopper and are used for spreading gravel in the coarse screen, and awaist-shaped hole is formed in the hopper; and the gravel sorting device has the beneficial effects that due to the arrangement of the rotating roller, the mixing hopper and the shoveling hopper on the rotating roller, gravel can be effectively spread to improve the screening effect, meanwhile, screened gravel can be automatically output outwards, manual interference is basically not needed in thewhole process, and automatic screening, feeding, discharging, unloading and the like of the gravel can be achieved.

The civil engineering gravel screening device comprises a bottom plate and is characterized in that the bottom plate is fixedly connected with a first box, the bottom plate is fixedly connected with an L-shaped plate, the L-shaped plate is fixedly connected with a first circular shaft, the L-shaped plate is fixedly connected with a second circular shaft, the L-shaped plate is fixedly connected with a swing mechanism, and the swing mechanism is fixedly connected with a screening mechanism. The invention relates to the field of screening equipment, in particular to a civil engineering gravel screening device. The technical problem to be solved by the invention is to provide the civil engineering sand and stone screening device which is convenient for civil engineering sand and stone screening.

The invention provides a cereal quantitative screening device which comprises a feeding groove, multiple screening cylinders, a first collecting cylinder, a second collecting cylinder and a third collecting cylinder. Multiple feeding holes are formed in the bottom end of the feeding groove, and a quantitative feeding assembly for quantitatively feeding materials into the feeding holes is mounted at the bottom end of the multiple feeding groove. The multiple screening cylinders are vertically arranged below the feeding groove, the top ends of the screening cylinders are connected with the bottom of the feeding groove, and the multiple screening cylinders communicate with the multiple feeding holes correspondingly. A first screen and a second screen which are arranged up and down are mounted in each screening cylinder. The first collecting cylinder is arranged below the feeding groove. The second collecting cylinder is arranged below the first collecting cylinder. The third collecting cylinder is arranged below the second collecting cylinder. According to the cereal quantitative screening device, graded screening of cereal can be achieved by arranging the screening cylinders, the first screens and the second screens, and collection of cereal of different grades can be achieved by arranging the first collecting cylinder, the second collecting cylinder and the third collecting cylinder.

The invention discloses tea fresh leaf sorting equipment. The tea fresh leaf sorting equipment comprises a machine body; a feed hopper is arranged at the top of the machine body; a flow separation netand a dust removing bag are arranged on the left side of the feed hopper; an air blower is arranged on the right side of the feed hopper; a vibration screen and a cooperative guide plate are arrangedunder the air blower; an impurity discharge port is aslant arranged under the guide plate; a cooperative one-bud and one-leaf sorting mechanism is arranged under the guide plate; a cooperative one-bud and two-leaf sorting mechanism is arranged under the one-bud and one-leaf sorting mechanism; and cooperative storage cylinders are arranged under the one-bud and one-leaf sorting mechanism and the one-bud and two-leaf sorting mechanism. The tea fresh leaf sorting equipment is simple in structure and convenient to use, realizes classified sorting of one-bud one-leaf and one-bud two-leaf of tea fresh leaves, improves the sorting efficiency of the tea fresh leaves, reduces the economical cost, is suitable for popularization and application, and meets actual application requirements.

The invention discloses a chemical material screening device facilitating rapid separation and impurity removal in the technical field of chemical material screening. The chemical material screening device comprises a screening box and a feeding hopper, the interior of the screening box is connected with a screening assembly through rotating shafts, and the outer side end of one rotating shaft extends out of the screening box and is connected with a rotating mechanism; the rotating mechanism comprises a swinging assembly and a moving assembly, the swinging assembly drives a first screen and a second screen to swing back and forth in a small range to screen materials, and impurity removal and graded screening are achieved at the same time under the action of the first screen and the second screen; the swinging assembly is adjusted to the left side section of a connecting groove through the moving assembly, the rotation amplitude of a follow-up rotating rod is increased, and then the left side ends of the first screen and the second screen can rotate to groove openings of a first discharging groove and a second discharging groove correspondingly, and therefore, impurities and materials accumulated on the first screen and the second screen can be discharged and collected respectively.