146results about How to "Improve screening accuracy" patented technology

The invention provides a building solid waste recycled aggregate preparation system with multi-layer screening and intelligent judgment functions and an operation method. The construction method comprises the construction steps of waste transportation and throwing, manual sorting, waste crushing, cleaning and impurity removal, fine crushing, multi-stage screening, quality detection and control, finished product storage and transportation and recycled aggregate application. According to the building solid waste recycled aggregate preparation system with the multi-layer screening and intelligent judgment functions and the operation method, accurate regulation and control of the screening process are achieved, and the production efficiency is remarkably improved. The quality stability of the recycled aggregate is ensured, the influence of building wastes on the environment is reduced, and the cyclic utilization of resources is promoted. By adopting the technology, the production scheme can be quickly adjusted according to market requirements, the adaptability is high, and more economic benefits are created for enterprises.

The invention belongs to the technical field of bacterial culture, and discloses a high-throughput automatic monoclonal screening and picking workstation, which comprises a protective box for protection and isolation, and a workbench is arranged in the protective box; the plate stack module comprises a rotating plate stack arranged at the bottom end of the workbench, and a plurality of columns of culture dishes are arranged on the rotating plate stack in a lifting manner; the transfer module is arranged on the workbench and used for transferring culture dishes; the pipetting module comprises a pipetting assembly and a material storage assembly, and the pipetting assembly is used for transferring strains in the culture dish into the material storage assembly; the identification module is used for identifying and positioning the strains in the culture dish and then controlling the pipetting assembly to accurately transfer the strains. The device is simple in structure and flexible and convenient to use, high-throughput screening and picking of strains can be fully automatically carried out in a clean closed environment, manual intervention is not needed, the screening efficiency is high, strain pollution caused by manual intervention is avoided, the screening precision is high, the screening cost is reduced, and experiments are greatly facilitated.

The invention discloses a tea bud screening method based on machine vision, and belongs to the technical field of image processing.The tea bud screening method comprises the steps that firstly, suspected bud region pixel point screening is conducted on a tea image, and a bud region significant filtering image is constructed; and then, calculating a pixel point villus coefficient value, accurately segmenting a villus region, introducing a feature fusion unit, carrying out deep fusion on the pixel value of the villus region and the villus coefficient value, and finally realizing high-precision tea bud region identification through a classification model in combination with bud form value features. Compared with a traditional method, technical optimization is carried out on the links of image preprocessing, feature extraction and classification recognition, the technical problem that the tea bud screening precision is low is effectively solved, and a new technical path is provided for intelligent tea screening.

The invention relates to a target tumor DNA fragment screening method based on deep learning, and belongs to the technical field of target tumor DNA fragment screening. A tumor DNA fragment screening model is constructed through a deep neural network, a training set is used for model establishment, and a test set is used for model performance testing. And obtaining to-be-identified positive tumor sample DNA sequencing data, carrying out positioning analysis on the to-be-identified positive tumor sample DNA sequencing data according to the trained tumor DNA fragment screening model, obtaining the position of a target tumor DNA fragment, and displaying the position according to a preset mode. According to the method, the training sample data in which a plurality of different types of tumor DNA fragments exist is processed, so that the interference of the plurality of different types of tumor DNA fragments in the same tumor training sample data on model training can be reduced to the greatest extent, the prediction precision of the model can be improved, and the screening precision of the tumor DNA fragments can be improved.

The invention discloses a spiral adjustable vibration screening instrument and a screening optimization method thereof, and belongs to the technical field of soil screening. A vibration screening box comprises a vibration adjusting frame and a multi-layer spiral screening assembly; the vibration adjusting frame comprises a vibration tray, a screw rod, a central column and a fixing ring; the multi-layer spiral screening assembly comprises a single-pipe spiral flow guide channel and a multi-layer spiral screening ring which communicate with each other from top to bottom, the single-pipe spiral flow guide channel is arranged in the annular space and fixedly connected to the top of the center column, and the multi-layer spiral screening ring is connected to the center column in a penetrating and sleeving mode and connected to the screw. At least three layers of screening channels are arranged in the multi-layer spiral screening rings, the diameters of screening holes of the screening channels are sequentially reduced from top to bottom, a telescopic sleeve with the adjustable length is arranged between every two adjacent multi-layer spiral screening rings on the same screw, and an adjusting spring is arranged between every two adjacent screening channels. The screening instrument can adjust screening parameters in real time, so that the screening precision and the screening efficiency are improved, and the cost consumption is reduced.

The invention discloses a plastic particle screening machine, and relates to the technical field of screening machines, the plastic particle screening machine comprises a working frame, the bottom end of the working frame is fixedly connected with a supporting seat, and a screening cylinder is driven to rotate through a servo motor and a worm and gear, so that the screening cylinder throws plastic particles located in a filter sieve to the inner wall of the screening cylinder; the plastic particles with the sizes smaller than those of the holes in the plastic particles enter the next-stage filter sieve, so that the plastic particles can be sieved step by step, the problem that part of the plastic particles with the sizes smaller than those of the plastic particles with the sizes larger than those of the plastic particles without being sieved is solved, the sieving precision can be effectively improved, and the sieving efficiency is improved. The screening machine is simple in structure and large in screening area, the screening efficiency can be effectively improved, meanwhile, the screening stage number can be automatically adjusted by rotating the filtering baffle, the grading screening precision can be adjusted according to the screening requirement, various screening requirements can be met, and the applicability of the screening machine can be effectively improved.

The invention provides an agricultural planting seed screening system based on weight detection, and relates to the technical field of agricultural seed screening, and the agricultural planting seed screening system comprises a feeding device module, a weight detection device module, a grading device module, a control module, a calibration unit and a fault early warning unit. Good and full high-quality seeds and low-quality seeds with light weight caused by dysplasia, damage or diseases and insect pests are effectively distinguished, compared with a traditional manual screening method or a mechanical screening method only based on sizes and shapes, the screening precision is greatly improved, a guarantee for higher-quality seeds is provided for agricultural production, and the method is suitable for large-scale popularization and application. The system can realize automatic continuous operation, can quickly carry out weight detection and grading screening on a large number of seeds, treats the large number of seeds in a short time, greatly improves the working efficiency of seed screening, is particularly suitable for seed pretreatment of large-scale agricultural planting, and is beneficial to shortening the preparation time before sowing.

The invention discloses a screening device for magnetic material processing, and belongs to the technical field of material screening, the screening device comprises a conveying device, the conveying device is used for conveying magnetic materials to be screened, the conveying device is provided with a grinding device and three fine separation devices, the grinding device is used for grinding the magnetic materials, and the fine separation devices are arranged on the conveying device; the fine separation device is used for finely screening the magnetic material; the three fine separation devices can screen the magnetic materials into six different magnetic materials according to the magnetism and the thermal sensitivity of the magnetic materials, and the screening effect is good; magnetic materials are adsorbed through the electromagnets arranged in the rotary drum, the materials with different magnetisms are screened out from different discharging grooves in cooperation with rotation of the rotary drum, and the screening precision is high; the grinding device grinds a magnetic material to a specified size so that the magnetic material can be conveniently adsorbed by an electromagnet, then the ground magnetic material is automatically conveyed through the conveying device, and the magnetic material is conveyed to pass through the three fine separation devices, so that full-automatic fine separation of the magnetic material is realized, the automation degree is high, and the continuity is good.

The utility model discloses a raw material crusher for producing and processing magnesia carbon bricks, and relates to the technical field of magnesia-calcium brick production, the raw material crusher comprises a support frame and a crushing box, the crushing box is placed at the top of the support frame, a feed hopper is fixed at the top of the crushing box, two rotating shafts are rotatably connected to the upper part in the crushing box, one end of each rotating shaft is provided with a gear, and the other end of each rotating shaft is provided with a gear; a discharging hopper is fixed to the position, below the rotating shaft, in the crushing box, and a screening hopper is arranged at the bottom of the discharging hopper. In the actual production process, the crusher and the motor are started, the motor controls the driving assembly to drive the screening hopper to move front and back, raw materials fed into the feeding hopper are crushed and screened, the screened raw materials fall into the collecting box under the raw materials, and the raw materials which do not pass through screening swing and fall into the other collecting box through the discharging table. The assembly is simple in structure and convenient to maintain, the raw material screening precision can be improved, and the requirements of the magnesia carbon brick production technology for raw material crushing and screening can be well met.

The invention belongs to the field of water transportation engineering, relates to a sand cabin capacity measurement technology, and particularly relates to a sand cabin capacity measurement method and system based on laser scanning, which are used for solving the problem that proper point cloud data rejection modes and loading coefficients during conversion cannot be allocated for different sand material types in the prior art. Comprising a data acquisition module, a data checking module, a data processing module and a database, the data acquisition module, the data checking module, the data processing module and the database are sequentially in communication connection, and the data checking module is further in communication connection with the database; the data acquisition module is used for carrying out volume data acquisition on a sand cabin and obtaining full cabin data and empty cabin data; according to the invention, the three-dimensional laser scanner is introduced as digital inspection equipment to quickly inspect the entering volume of the sand, so that an objective and accurate volume result is obtained, disputes caused by human subjective factors in the sand collecting process are avoided, and the shipborne sand volume can be quickly confirmed.

The invention belongs to the technical field of constructional engineering, and particularly relates to an adjustable construction sand screening device which comprises a bottom plate, a protection structure is fixedly connected to the upper end face of the bottom plate, a feeding plate is fixedly connected to the upper end face of the protection structure, a separation structure is fixedly connected to the right side of the lower end face of the feeding plate, and a pushing structure is arranged in an inner cavity of the separation structure. A driving structure is arranged on the right end face of the separation structure, a screening structure is arranged in the middle of the right side of an inner cavity of the protection structure, adjusting structures are arranged on the right sides of the end faces of the front side and the rear side of the protection structure correspondingly, and a storage structure is fixedly connected to the lower end face of the inner cavity of the protection structure. The large-size gravel screening device has the advantages that the large-size gravel on the screening structure is cleaned through the movement of the pushing plate and the pushing block, so that the effect of conveniently adding and sorting the gravel by personnel in use is achieved, and the gravel screening precision is improved in use to guarantee that the gravel passes through screening.

The utility model provides a raw material screening device for terretride production relates to raw material screening technical field, including screening box, the both ends of screening box are all set up and lead material mouth, the both sides of screening box are set up respectively and shake the mouth, import and export, and the inside of screening box is provided with screening mechanism, screening mechanism includes screening box, screening box swing installation is in the inside of screening box. The utility model discloses, through setting up air pump, connecting pipe, gas cavity and gasbag pipe, has constructed adjustable screening hole aperture control system. Air pump transports gas to gas cavity through connecting pipe, drives gasbag pipe to swell or contract in screening hole, realizes accurate, flexible adjustment of screening hole effective aperture, can adapt to different batches, different process stage's raw material granularity demand of terretride, solves the problem that traditional device filter hole fixedly is not adjustable, needs frequently to replace screen, promotes equipment versatility and screening precision, guarantees that raw material granularity meets the specific standard of tablet compression.

The utility model discloses color steel plate powder coating screening equipment, and particularly relates to the technical field of metal powder coating production, which comprises a shell, a feed hopper fixedly connected to the top of the shell, a partition plate I and a partition plate II fixedly connected to the inner side of the shell, a concentration hopper fixedly connected to the inner sides of the partition plate I and the partition plate II, and a discharge hopper fixedly connected to the bottom of the shell. An outer frame is fixedly connected to the bottom of the shell, and a collecting frame is slidably connected to the inner side of the outer frame. The connecting rod, the first telescopic rod, the second telescopic rod and the fixing base are matched in a rotating supporting mode, the vibrating motor, the second positioning rod and the second spring are combined to enable the screen plate to conduct horizontal and vertical two-way composite vibration, and the vibration frequency and the screening efficiency are improved; the feeding amount is adjusted and controlled through the rotating plate, coating powder is stirred through reciprocating swing of the fixing plate and the toothed bar, the coating powder is evenly distributed on the surface of the screen plate, the initial contact area of the powder and the screen is increased, the screening speed is kept, and the stability of good screening precision is kept.

The utility model belongs to the technical field of corn seed selection, and particularly relates to a seed selection mechanism for selecting high-quality corn, which comprises a base, an equipment main body fixedly mounted at the top of the base, a feeding hole formed in the top of the equipment main body, a screen box arranged on the inner wall of the equipment main body, a limiting strip arranged on one side of the screen box, and an inserting hole formed in one side of the equipment main body, a limiting groove is formed in the inner wall of the equipment body, a groove is formed in the inner wall of the equipment body, a compression spring is arranged in the groove, a slag discharging opening is formed in one side of the equipment body, and a vibration mechanism is arranged on the base. The screening box, the inserting opening, the groove, the compression spring, the rotating motor, the rotating rod and the extrusion block are arranged to be used in cooperation, the screening box is movably connected with the inserting opening and the groove in an inserted mode, the rotating motor is driven to work, the rotating rod can be rotated to drive the extrusion block to rotate, and the screening box can be extruded conveniently; and meanwhile, the screen box can shake left and right under the acting force of a compression spring, materials in the screen box can be rapidly screened conveniently, and operation and use are convenient.

The utility model relates to the technical field of pigment grading, and particularly discloses a multi-stage pigment grading device which comprises a box body, a first filter cartridge, a second filter cartridge and a third filter cartridge are sequentially arranged in the box body from top to bottom, and the first filter cartridge, the second filter cartridge and the third filter cartridge are used for screening pigment particles. Guide mechanisms are arranged on the left side and the right side in the box body and used for guiding the screened pigment particles. The pigment particles are screened step by step through the first filter cartridge, the second filter cartridge and the third filter cartridge, the screening precision is high, the pigment particles can be rapidly screened and collected, repeated screening is not needed, the screening efficiency is improved, and the operation time is saved.

The utility model relates to the technical field of aquaculture, and discloses a fry screening device for aquaculture, which comprises a box body, the inner wall of the box body is connected with a screen I in a sliding manner, the inner wall of the box body is connected with a screen II in a sliding manner, and the outer walls of the screen I and the screen II are fixedly connected with mounting blocks; a hollow block is slidably connected to the inner wall of the mounting block, a handle is slidably connected to the interior of the hollow block, a transmission block is fixedly connected to the outer wall of the handle, a fixing rod is arranged on the upper surface of the transmission block, an L-shaped rod is slidably connected to the outer wall of the fixing rod, and the outer wall of the upper side of the L-shaped rod is slidably connected to the inner wall of the mounting block. According to the screening device disclosed by the utility model, through mutual cooperation of the mounting block, the hollow block, the handle, the transmission block, the spring, the fixed rod, the L-shaped rod and the limiting rod, the screen I and the screen II are quickly mounted and dismounted, so that breeding personnel can conveniently replace aged and deformed screens in time, and therefore, the screening quality is guaranteed.

This utility model relates to the technical field of building material processing equipment, specifically to a multi-stage aggregate particle size screening device. The multi-stage aggregate particle size screening device includes a frame, screening components, a feeding conveyor belt, and a multi-stage discharge conveyor belt. The screening components are inclinedly arranged on the upper part of the frame. The feeding conveyor belt is parallel to the screen components above them for feeding aggregates to be screened. The multi-stage discharge conveyor belts are arranged sequentially from top to bottom below the screen components for receiving screened aggregates of different particle sizes. The screening components include a frame plate, screen bars, and hopper plates. The frame plates are symmetrically installed on the upper part of the frame. The screen bars are spaced apart along the length of the frame plates and divided into multiple rows along the height direction. The screening gap between each row of screen bars decreases progressively from top to bottom. Each row of screen bars has a hopper plate at its discharge end, with the hopper plate length decreasing progressively from top to bottom. A motor is installed on the outside of the frame plate.

The utility model discloses a kind of silica mortar production sieve powder equipment, comprising: main component, the main component includes outer cylinder, centrifugal cylinder and filter hole;The outer cylinder inside movablely connects centrifugal cylinder, the filter hole is opened in centrifugal cylinder side wall;Scattering component, the scattering component includes trapezoidal receiving seat and semicircular scattering piece, trapezoidal receiving seat is fixedly installed in centrifugal cylinder inner wall, trapezoidal receiving seat front end movablely connects semicircular scattering piece, the scattering component still includes receiving groove, through-hole, cylindrical rod and limit piece.The utility model semicircular scattering piece is subjected to external force under the cooperation of cylindrical rod and through-hole, can realize rotation, and then can drive silica mortar material in rolling process constantly change motion trajectory, so that silica mortar material is scattered, and then can effectively avoid the phenomenon of blockage.

The utility model discloses a kind of pretreatment devices of camellia seed, relate to agricultural product processing machinery field.The utility model includes sheller, dust collector is installed on the sheller, dust collector is connected with negative pressure fan by dust suction pipe, negative pressure fan generates negative pressure airflow, the dust and chippings generated in the shelling process of camellia seed are sucked into dust suction pipe, are collected and handled by negative pressure fan, sheller side is equipped with water pump, water pump outlet end is connected with water jet pipe, the spout of water jet pipe is towards its below receiving plate area, sprays atomized water bead, adsorbs escaping dust, falls to receiving plate surface, forms dust removal system, first, the device can efficiently collect the dust and chippings generated in the shelling process by the synergistic effect of sheller and dust collector, negative pressure fan, significantly reduce the pollution of production environment, atomization dust removal system further adsorbs escaping dust, forms double dust removal mechanism, substantially improves cleaning effect.

The invention relates to the field of grain production, and particularly discloses a superior and inferior product sorting device for grain production. The sorting box body assembly is connected with the base; the saturation screening device is connected with the interior of the sorting box body assembly; the primary separation device is connected with the separation box body assembly and is communicated with the saturation screening device; the gravity screening device is connected with the interior of the sorting box body assembly; the gravity screening device comprises a material collecting device, a separation box body assembly, a gravity screening device and a separation box body assembly, and the second-stage separation device is connected with the interior of the sorting box body assembly, through a multi-stage screening mode, grain particles can be comprehensively and carefully screened, the screening precision is improved, and non-full wizened particles and saturated particles can be effectively separated out.

The utility model relates to the technical field of oil fracturing sand processing, disclose a kind of efficient sorting equipment for oil fracturing sand, including shell, the shell left end is fixedly connected with multiple motor one, the motor one drive end is all fixedly connected with protruding roller, the shell inner wall left side is slidably connected with multiple sliding blocks, the sliding block inner wall is connected with screen cloth by buckle assembly, to be used for the disassembly of screen cloth, the shell top is fixedly connected with processing cylinder, the processing cylinder top is fixedly connected with motor two, the motor two drive end is provided with processing assembly, to be used for to crack sand and scatter drying. In the utility model, by rotating knob and pulling card bar, screen cloth can be removed from the equipment, single-person rapid operation can be realized, downtime is greatly shortened, maintenance cost is reduced, screen stability is ensured to improve screening accuracy, and multi-specification screen switching can also be quickly completed, which is suitable for efficient production and flexible demand of oil field.

The utility model relates to the technical field of lithium battery recycling equipment, and particularly discloses a lithium battery sorting device which comprises a bearing plate and a supporting ring, a control table is arranged on one side above the supporting ring, a mounting frame is arranged in the middle of the supporting ring, a plurality of supporting rods are connected between the supporting ring and the mounting frame, and bearing columns are arranged above the supporting rods. A bottom plate is arranged above the bearing column, a shell is arranged in the bottom plate, a top plate is arranged above the shell, a feeding hopper is arranged above the top plate, a motor is arranged on one side of the feeding hopper, a rotating shaft is arranged at one end of the motor, a plurality of clamping blocks are arranged on the outer side of the rotating shaft, and a plurality of layers of screens are arranged in the shell. A material guide groove is formed in one side of each layer of screen, a material receiving hopper is arranged below each material guide groove, and a weighing module is arranged below each material receiving hopper, so that the sorting quality and efficiency of the lithium batteries are effectively improved, the structure is simple, the supporting is stable, the operation is simple and convenient, the disassembly and assembly are convenient, and the maintenance is convenient.

The invention discloses a turn-milling composite numerical control machine tool with a slant bed body capable of discharging automatically, and belongs to the technical field of machine tool discharging. The turn-milling composite numerical control machine tool comprises a discharging box, a vibration frame is arranged on the inner wall of the discharging box, an upper-layer screen and a lower-layer screen are arranged on the inner wall of the vibration frame, a movable shelf is arranged on the outer wall of one side of the discharging box, and a liquid storage tank is arranged at the bottom of the discharging box; a discharging opening is formed in the other side of the discharging box in a penetrating mode, and a residue filtering roller is arranged at the bottom of the discharging opening; according to the turning and milling combined numerical control machine tool, the machining environment of the turning and milling combined numerical control machine tool is optimized, efficient screening, cleaning, recycling and extrusion forming of the metal chippings are achieved, and the machining efficiency, the environmental protection property and the resource utilization rate are remarkably improved.

The utility model provides a kind of multi-layer screening structure of building gravel screening machine, comprising: underframe assembly, frame body assembly and screening assembly, the upper surface of underframe assembly is equipped with the frame body assembly for screening assembly, underframe assembly includes underframe body and buffer, the upper surface of underframe body is equipped with buffer, frame body assembly includes vibrating element, mounting and shelf plate, screening assembly includes the screening plate for screening, multiple screening plates are installed between shelf plate by mounting, compared with prior art, the utility model has the beneficial effects as follows: by setting screening assembly, when using, by multiple screening plates between shelf plate using mounting, when using, can carry out step-by-step, fine layered screening to building gravel, can separate multiple different particle size gravel at a time, greatly improve the efficiency of screening operation.

The utility model discloses a sand screening machine for constructional engineering. The sand screening machine comprises a shell, a sand storage box connected to a top plate of the shell, an intermittent quantitative discharging mechanism, a vibration screening mechanism and a driving mechanism connected to the outer wall of the shell, wherein the intermittent quantitative discharging mechanism and the vibration screening mechanism are arranged in the shell. And a discharging opening penetrating through the top plate of the shell and the sand storage box is formed in the joint of the top plate of the shell and the sand storage box. The feeding end of the intermittent quantitative discharging mechanism communicates with the discharging opening, the power input end of the intermittent quantitative discharging mechanism is connected with the driving mechanism so as to intermittently rotate in the circumferential direction under the action of the driving mechanism, and then quantitative sand materials are intermittently discharged into the vibration screening mechanism below. The shell is provided with a first discharging port and a second discharging port which communicate with the two discharging ends of the vibration screening mechanism correspondingly, and the vibration screening mechanism is used for conducting vibration screening on sand falling into the vibration screening mechanism so that miscellaneous materials and qualified materials can be discharged from the first discharging port and the second discharging port correspondingly. According to the novel sand screening machine, the sand screening efficiency and the sand screening quality can be improved, and the maintenance and repair workload is reduced.

This application relates to a screening device for pill production, belonging to the field of pill production technology. It includes a screening box with a conveying pipe at the top. Inside the screening box, two screen mechanisms are arranged sequentially from top to bottom. The mesh size of the upper screen mechanism is larger than that of the lower screen mechanism. A collection box is located below the lower screen mechanism. Rotating pins are provided on the bottom walls of both screen mechanisms, which are rotatably connected to the inner wall of the screening box via these pins. A cam mechanism is provided on both sides of each rotating pin, driving the screen mechanism to rotate relative to the screening box. This application achieves multi-stage screening of pills, improving the screening efficiency.

The invention provides a performance testing and screening method for a computing chip. The method comprises the steps that a reference chip and a chip to be tested are connected into a loop through an HSIO interface, and the loop is used for achieving data communication between the reference chip and the chip to be tested; the reference chip and the to-be-tested chip operate corresponding performance test software according to a performance test instruction sent by the remote computer to respectively obtain performance parameters of the reference chip and the to-be-tested chip, and the performance parameters are uploaded to the remote computer; and the remote computer determines whether the to-be-tested chip is a qualified chip or not by comparing the performance parameters of the reference chip and the to-be-tested chip, and rejects the unqualified to-be-tested chip. According to the invention, the to-be-tested chips are screened based on comparison of the performance parameters of the reference chip and the to-be-tested chips, so that the screening precision can be improved; one reference chip is connected with a plurality of chips to be tested at the same time, so that the speed of performance parameter measurement and chip screening of the chips to be tested can be obviously improved.

The embodiment of the application relates to the battery technical field, and discloses a battery pack equalization method, device and electronic equipment, the method comprises the following steps: obtaining cloud equalization identification information sent by a network device; wherein the cloud equalization identification information is generated by the network device based on historical charging data and / or historical discharging data of a target battery pack, and is identification information indicating whether each single battery in the target battery pack needs equalization; generating local equalization identification information based on current state parameters of the target battery pack; the local equalization identification information is used for indicating whether each single battery in the target battery pack needs equalization; based on the cloud equalization identification information and the local equalization identification information, determining a target single battery needing equalization in the target battery pack, and equalizing the target single battery.

The invention discloses a screening device for potassium ore crushing in potassium chloride production, the device is composed of a first-stage crushing unit, a screening unit, a second-stage crushing unit and a material conveying unit which are connected in sequence, the first-stage crushing unit is provided with a single-roller crusher with wear-resistant insections to complete preliminary crushing, and the screening unit is provided with a advection screen driven by double speed reducers; according to the second-stage crushing unit, the vibration frequency and amplitude can be adjusted in a stepless mode, a screen is of a detachable and replaceable abrasion-resistant metal structure, precise screening is achieved, and the second-stage crushing unit is matched with a double-tooth-roller type crusher through a quantitative feeding bin to conduct secondary refining on large-particle potassium ore. And the material conveying unit adopts an anti-skid, wear-resistant and speed-adjustable conveying belt, so that material transfer and large particle backflow crushing are realized. According to the device, through multi-stage crushing and precise screening of potassium ore, material accumulation and blockage are avoided, the crushing and screening qualified rate and production efficiency are improved, equipment operation is stable, maintenance is convenient, and the potassium chloride product processing quality and production benefits are effectively improved.