1011results about How to "Improve screening efficiency" patented technology

The present invention relates to the field of grain transport technology, and in particular to an agricultural grain transport device, comprising a base, a shell fixedly installed on the top of the base, a feed hopper and a discharge hopper respectively arranged at both ends of the shell, a cylindrical screen arranged inside the shell, a refrigeration mechanism arranged inside the shell, a mounting plate fixedly installed on the side of the discharge hopper away from the shell, a motor fixedly installed on the top of the mounting plate, a rotating shaft fixedly connected to the output end of the motor, and a spiral hollow disk and a solid disk fixedly connected to the outer wall of the rotating shaft. The advantages are: the inside of the shell maintains a low temperature, the low temperature helps to increase the hardness difference between grain and impurities, improve the efficiency of impurity screening, reduce the stickiness between grains, ensure the smooth flow of grain, the screen effectively screens out impurities in the grain, improves the purity of the grain, pushes the grain in layers, prevents excessive accumulation of grain, and reduces the damage of grain due to friction and extrusion.

The invention provides a precoated sand coating production screening machine, belongs to the technical field of precoated sand production, and solves the technical problems that an existing screening machine is tedious in screen replacement, high in energy consumption, poor in screening effect and the like. Comprising a rack, an up-down vibration mechanism, a screen mechanism and a screen box mechanism, the screen box mechanism is hinged to the lower portion of the inner side of the rack, a transmission mechanism, a first driving motor and a high-pressure fan are arranged on the upper end face of the rack, an eccentric vibration mechanism is arranged on the side portion of the rack, and a plurality of reset springs are arranged between the left side and the right side of the screen box mechanism and the rack; a turning plate mechanism is arranged on the rear side of the screen box mechanism, a plurality of blower guns are arranged on the inner top of the screen box mechanism, a scattering roller is arranged on the rear side of the interior of the screen box mechanism, and a plurality of scraper mechanisms are arranged on the screen mechanism. The vibrating screen can vibrate up and down, is low in energy consumption, good in vibration effect and capable of vibrating left and right, enables raw materials to be dispersed, is high in screening efficiency, long in screening path, stable in screening quality, convenient to install and capable of being automatically cleaned, and ensures that the working environment is clean.

The utility model discloses a chemical raw material multi-layer screening and grading device, which belongs to the technical field of chemical raw material screening treatment, and adopts the technical scheme that the chemical raw material multi-layer screening and grading device comprises a screening box, the top of the screening box is communicated with a hopper, and a scattered screening mechanism is arranged in the screening box. When the chemical raw materials are added into the screening box through the hopper, the chemical raw materials can fall onto the carrying net in the disc frame, at the moment, the motor drives the shaft rod to drive the scattering rods to rotate, the chemical raw materials which are extruded and caked for a long time can be effectively scattered, large blocks are prevented from hindering a subsequent screening path, and the scattered chemical raw materials are prevented from falling downwards; and then the raw materials are subjected to multi-layer screening through the primary screening structure driven by the shaft rod, enter the material guiding opening and are discharged into the re-filtering structure to be treated again, so that normal screening of all stages of screens is ensured, the screening efficiency is remarkably improved, accurate grading of the chemical raw materials with different particle sizes is ensured, and the screening quality is optimized.

The invention relates to the technical field of smashing devices, in particular to a smashing device for a graphite lithium battery negative electrode material, which comprises a shell, the interior of the shell is divided into a smashing cavity and a storage cavity, and a storage part with a hollow structure is arranged in the storage cavity; the crushing and conveying mechanism is used for conveying external graphite particles to the crushing cavity and carrying out coarse crushing on the graphite particles in the conveying process; the crushing mechanism is used for crushing the graphite particles; the driving mechanism is used for transmitting power to the crushing mechanism, and meanwhile, the air and the graphite particles in the crushing cavity are conveyed into the storage part in the power transmitting process; and the screening plate is installed in the storage part, an outlet is formed in the storage part, and the storage part communicates with the crushing cavity through a circulating pipe. Graphite particles are conveyed into the crushing cavity through the crushing and conveying mechanism, then the driving mechanism is used for driving the crushing mechanism to crush the graphite particles, and finally the graphite particles are screened through the screening plate, so that the crushing efficiency of the graphite particles and the uniformity of the crushing granularity are improved.

The invention relates to the technical field of zinc powder processing equipment, in particular to a multi-stage grinding system for preparing high-purity zinc powder, which comprises a primary grinding unit, a secondary grinding unit, a tertiary fine grinding unit, a separating and screening unit, a collecting unit, a cooling system and a control system, crushing larger zinc particles into a preset coarse particle size; and the secondary grinding unit is a ball mill and is used for further grinding the zinc powder subjected to primary grinding to ensure that particles reach a medium particle size range. According to the multi-stage grinding system, through automation, multi-stage smashing and real-time feedback control, efficient production of zinc powder is achieved, and it is guaranteed that the particle size of the zinc powder is uniform, and the purity of the zinc powder is high. A system integrated cooling mechanism prevents oxidation, a separation screening unit improves screening efficiency, and a sealed conveying device ensures environmental protection and safety. Overall automation improves production efficiency and is suitable for large-scale industrial application.

The utility model discloses equipment for screening building materials in the technical field of building materials, which comprises a screening box, a screen mesh, a feed port, a first discharge port, a second discharge port, a supporting seat, a scraper mechanism and a vibrating mechanism, the feed port is arranged at the top of the screening box, the first discharge port is arranged on the side wall of the screening box, and the second discharge port is arranged on the side wall of the screening box. The second discharging port is formed in the bottom wall of the screening box, a cavity is formed in the screening box, the screen is arranged in the cavity, the feeding port, the first discharging port and the second discharging port are communicated through the cavity, the scraper mechanism comprises a scraper, a push rod and a power mechanism, and the power mechanism drives the scraper to move back and forth on the upper surface of the screen towards the first discharging port. Supporting legs are arranged at the bottom of the supporting seat, a cavity structure sleeved with the supporting legs is arranged at the top of the vibration mechanism body, the vibration mechanism is arranged at the bottom of the supporting seat, and a convex block of the vibration mechanism rotates to drive the screening box to vibrate up and down. The technical problems that a screen of an existing device is prone to being blocked, and the screening efficiency is low are solved.

The expansion anchor bolt sleeve screening and conveying equipment comprises a rack, a feeding mechanism, a pressing mechanism and a rotating drive, the feeding mechanism comprises a feeding machine and a conveyor, the pressing mechanism comprises a hinge plate and a rotating shaft, and the rotating drive comprises a clamping block and a push plate. Deflection is carried out through the hinge plate, so that the sleeves which are not clamped into the rotating disc can be downwards pressed and conveyed to the bearing plate, and the sleeves are driven by the insertion rod to be overturned and then output; the sleeve with the opening facing the same side as the rotating disc can be clamped into the through groove, then is driven by the rotating disc to be screwed out and then is output, so that the condition that the imaging equipment is easy to screen and convey mistakenly is avoided; by arranging a first spring and a lower pressing shell, the pressure on the next sleeve is reduced, and the next sleeve is prevented from being damaged; and the multiple rolling shafts are driven to rotate through the second rotary driving device, so that the sleeves, extruded by the lower pressing shell, on the hinged plates can rapidly slide out of the hinged plates, and therefore the screening efficiency is improved.

The utility model relates to the field of screening devices, and discloses a biological feed screening device which comprises a screening base, a screening box, a screen, a material receiving layer and a discharging port, the screening box is arranged at the top of the screening base, the screen is arranged in the screening box, and the material receiving layer is arranged on the inner wall of the screening base and corresponds to the bottom of the screen. One side of the screening base is provided with a discharge port corresponding to one side of the screen and one side of the material receiving layer; the vibrating device is arranged between the screening base and the screening box and is used for automatically screening the screen; according to the screening device, the structural design is compact and reasonable, the problem that the screen of a common screening device is generally fixed to the screening device is solved, and the screening efficiency of the screening device is greatly improved.

The invention discloses a deep mutation scanning method based on protein-protein interaction in bacterial cells and a binding affinity prediction method. In the invention, split dCas9 proteins (SEQ ID NO.1 and SEQ ID NO.2) are respectively subjected to fusion expression with a receptor and a ligand with binding affinity to be detected, and are combined with a toxic sgRNA guide sequence (SEQ ID NO.3), and when PPI occurs, a toxic dCas9: sgRNA complex is formed to inhibit bacterial growth, so that a PPI affinity size signal is converted into a bacterial cell generation speed signal, and the signal can be quantified into a copy number value through next-generation sequencing. The invention further designs a deep learning binding affinity prediction model, high-affinity sequences can be screened from theoretical mutation space, the workload and cost of experimental verification are remarkably reduced, and a reliable basis is provided for subsequent protein function optimization and design.

The invention provides a multi-stage vibration screening machine for ore fine selection, and belongs to the field of ore screening, the multi-stage vibration screening machine comprises a screening frame, a multi-stage screening mechanism is arranged on one side of the screening frame and used for conducting multi-stage screening on ore, and a dust falling assembly is arranged on one side of the multi-stage screening mechanism and used for conducting dust falling treatment on the ore being screened. A conveying assembly is arranged on one side of the multi-stage screening mechanism and used for automatically conveying ore needing to be screened into the screening frame. According to the multi-stage ore screening device, by arranging the multi-stage screening mechanism, multi-stage screening of ore is achieved, and the effect of conveniently replacing a screen is achieved; through the arrangement of a vibration motor and a spring, the screening frame can vibrate, and the first screen, the second screen and the third screen are matched for use, so that multi-stage screening can be performed on ores; and the first screen, the second screen and the third screen are connected to the screening frame in a bolted mode, so that a worker can replace the first screen, the second screen and the third screen conveniently according to different ores, and the screening efficiency is improved.

The invention discloses a crushing and sieving device for preparing sodium dichloroisocyanurate powder, and relates to the technical field of preparation of sodium dichloroisocyanurate powder.The crushing and sieving device comprises a sieving box, a crushing box and mounting blocks, and the mounting blocks are fixedly mounted on the inner wall of the sieving box; according to the sodium dichloroisocyanurate powder screening device, after being crushed, sodium dichloroisocyanurate powder enters the screening box and falls onto the inclined screening plate, the sodium dichloroisocyanurate powder moves in the inclined direction under the action of gravity, vibration generated by working of the crushing device is transmitted to the screening box and the screening plate, powder movement and screening are assisted, the screening efficiency is improved, and the screening effect is improved. Impact force and gravity generated when powder falls act on the elastic pieces to vibrate the elastic pieces, the vibration effect of the screening plate is enhanced, powder accumulation can be prevented through reset vibration of the elastic pieces, the powder is loosened and easy to flow, synchronous screening is promoted when the powder slides down, the screening efficiency and quality are improved, materials are accurately classified and screened according to the particle size, and high-quality raw materials are provided for subsequent procedures.

The invention discloses an adenosine kinase mutant with high thermal stability and application thereof, and relates to the technical field of enzyme engineering, and the adenosine kinase mutant with high thermal stability is obtained by performing point mutation on the 253rd site or the 82nd site of adenosine kinase as shown in SEQ ID NO: 1. According to the invention, an adenosine kinase mutant is used as a biocatalyst in an enzyme catalysis manner; the method is used for enzymatic synthesis of 5 '-adenylic acid, adenosine and adenosine triphosphate react to prepare adenylic acid, generation of by-products and impurities in the reaction is reduced to a certain extent, production efficiency and purity of adenylic acid are improved, reaction conditions are mild in preparation in an enzyme catalysis mode, pollution to the environment is avoided, and the method is suitable for industrial production. And the high-thermal-stability adenosine kinase mutant is applied to adenylic acid preparation, so that the preparation efficiency and yield of adenylic acid can be improved.

The utility model discloses a seed screening and drying device for forestry planting and relates to the technical field of seed screening. Comprising a seed conveying mechanism, the seed conveying mechanism is connected with a pneumatic conveying device to convey seeds, a stirring device is arranged in the seed conveying mechanism, the stirring device stirs the seeds to enable the seeds to be separated from impurities, the impurities are blown to be separated by air flow, and a heating mechanism is further installed on the seed conveying mechanism. Seeds entering from a discharging pipe are conveyed into a screening barrel through pneumatic conveying equipment, when the pneumatic conveying equipment blows out airflow, heat generated by a heating rod can be driven to synchronously enter the screening barrel to dry the seeds, and in the drying process, the airflow continues to be supplied into the screening barrel; as the seeds are driven by the stirring blades, light impurities in the seeds float upwards and are discharged through a waste outlet, and moisture is also discharged accordingly, so that the effects that the seeds are dried while being screened, and the screening efficiency is improved are achieved.

The invention belongs to the technical field of waste concrete prefabricated part recycling, and particularly relates to a waste concrete prefabricated part recycling crusher capable of being pretreated, which comprises a shell, a partition plate is fixedly connected to the inner wall of the shell, an L-shaped block is fixedly connected to the outer wall of the shell, and a vertical groove and a transverse groove are formed in the shell. A feeding hopper is arranged above the shell, a collecting box is connected to the lower portion of the shell in a sliding mode, a smashing device, a screening device and an auxiliary device are arranged on the shell, the auxiliary device comprises a material pushing plate, and the material pushing plate penetrates through the partition plate and is connected with the partition plate in a sliding mode. According to the waste concrete prefabricated part recycling crusher capable of being pretreated, through ingenious cooperation of the material pushing plate, the cam, the spring and other assemblies, the material pushing plate can automatically reciprocate, waste is continuously pushed to the crushing roller, accumulation and retention of the waste in the crushing process are effectively reduced, and therefore the crushing efficiency is remarkably improved.

The present invention relates to the technical field of sand-dropping machine equipment, and discloses an exciter-type inertial vibration sand-dropping machine, comprising a base, a vibration structure and a screening structure; the base is rectangular, the vibration structure is fixedly arranged on the upper wall of the base, and the screening structure is fixedly arranged on the vibration structure; the present invention has a high-efficiency screening effect; through the synergistic effect of the first vibration component and the second vibration component, the vibration effect of the first screen plate can be improved, and the overall solution can be assembled and structured according to different needs, providing flexibility and customization possibilities to meet the needs of different users and different application scenarios; by setting a toggle structure, especially the design of a toggle rod, it can be reciprocated and tilted under the screen plate, so that the toggle rod can be inserted into the screen hole under the elastic force, effectively preventing the blockage of the screen hole and ensuring the continuity and stability of the screening process.

The utility model discloses a novel impurity removing and screening device for pine nut processing. The novel impurity removing and screening device comprises a processing box and supporting legs. According to the pine nut screening device, the brush, the air exhaust cover and the air outlet holes are adopted, during operation, pine nuts moving in the screening cylinder can make contact with the cleaning plate on the surface of the blowing pipe in a larger range when the screening cylinder rotates, the brush on the surface can wipe the surfaces of the pine nuts, impurities on the surfaces of the pine nuts are removed, and the screening efficiency is improved. The air outlet holes in the surface of the blowing pipe can guide out air sprayed out of the air spraying holes, impurities on the surfaces of the pine nuts can be further removed through impact of airflow, and the air exhaust cover below the air outlet holes can synchronously suck the interior of the pine nuts while air is sprayed out through the air outlet holes; therefore, the blown and scraped impurities can be guided out in time by the exhaust hood, secondary attachment of the impurities is avoided, the impurity removal effect on the pine nuts is improved, and the pine nut impurity removal device has the advantages of multiple impurity removal and screening and good impurity removal effect.

The utility model discloses a sand blasting mechanism with a buffer structure, which comprises a sand blasting box, a sliding frame is arranged on the rear side of the upper end of the sand blasting box, the front end of the sliding frame is in bolted connection with a sand blasting head, a threaded screw rod penetrates through the front end of the sliding frame, the right side end of the threaded screw rod is connected with a power motor, and a positioning plate is arranged in the middle of the sand blasting box. Limiting columns penetrate through the corners of the positioning plate, a clamping plate is connected to the upper end of the positioning plate, a screening box is arranged at the bottom end of the sand blasting box, a discharging hopper is fixedly connected to the right side end of the screening box, and a collecting box is arranged at the lower end of the discharging hopper. According to the sand blasting mechanism with the buffering structure, spraying materials can be recycled and screened in the sand blasting operation process of workpieces through the screening structure, the operation convenience is improved, meanwhile, due to the arrangement of the buffering structure, pressure can be absorbed and buffered when the sand blasting force is too large, the workpieces subjected to sand blasting are protected, and the service life of the workpieces is prolonged. And the damage or damage condition of the workpiece caused by overlarge sand blasting pressure is prevented, and the reject ratio 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 relates to the technical field of seed detection, in particular to a method, device and equipment for detecting seed quality and a storage medium, and the method comprises the following steps: based on image acquisition equipment, setting the resolution and illumination intensity of image acquisition, adjusting the focal length and exposure time of the acquisition equipment, and performing data acquisition on seeds to obtain a seed image data set; according to the method, significant optimization of seed quality detection is realized through the convolutional neural network and the incremental learning algorithm, the accuracy of edge detection is improved, and the seed and the background are clearly separated by optimizing the image contrast, so that extraction of morphological characteristics is more accurate, morphological parameter calculation is more automatic, and the accuracy of edge detection is improved. Compared with the prior art, the processing speed and accuracy are remarkably improved, personal errors are reduced, further, incremental learning enables the model to be continuously self-optimized and adapt to different batches of seed features, the generalization ability of the detection model is enhanced, and the seed screening efficiency is greatly improved.

The utility model discloses grinding and sorting equipment, which relates to the technical field of cement production and comprises a roller press, a dry classification cabin and a ball mill, a discharge port of the roller press is communicated with a feed port of the dry classification cabin, a coarse material outlet of the dry classification cabin is communicated with and returns to the feed port of the roller press, and a fine material outlet of the dry classification cabin is communicated with a feed port of the ball mill; the dry type grading cabin comprises a scattering unit and a grading unit, the dry type grading cabin is adopted to replace an original two-stage powder selecting structure and matched with a circulating fan combination, equipment is reduced, and the equipment process is simplified; the particle size of a finished product material can be effectively controlled, and the finished product quality is improved; configuration power is low, and equipment energy consumption is effectively reduced.

The invention relates to the technical field of AI large models, in particular to a large model resume screening system and method for the human industry, and the system consists of a working post analysis module, a candidate resume analysis module, a matching degree analysis module and a personal information module. The working post analysis module is used for deeply analyzing and extracting key requirements of working posts; the candidate resume analysis module is used for comprehensively analyzing the uploaded candidate resumes and extracting key information; the matching degree analysis module is used for carrying out accurate matching degree analysis in combination with working post requirements and candidate information and giving a comprehensive ranking; the personal information module is used for the user to manage personal information and account setting; the large model resume screening system and method for the human industry have the beneficial effects that efficient screening and processing of a large number of resumes are achieved through an automation technology, so that the working pressure of a human resource department is remarkably reduced, and the screening efficiency is greatly improved.

The utility model relates to the technical field of mushroom sorting, and discloses a mushroom sorting machine which comprises a base and two supports, the two supports are both fixedly connected with the base, two screening frames are arranged between the two supports, the bottom ends of the two screening frames are both provided with screening mechanisms, and the screening mechanisms are arranged on the two supports. Screening plates are fixedly mounted on the outer sides of the two screening frames correspondingly, and two vibration grooves are formed in the opposite inner sides of the two supports correspondingly. The motor drives the rotating shaft and the cam to rotate, the cam strikes the two screening plates when rotating, the cam drives the screening frame, the screening frame, the screening shaft and the like to reciprocate up and down through the screening plates, and meanwhile the springs at the two ends of the screening plates support the screening plates to assist the two screening plates in vibrating up and down. The upper screening shaft and the lower screening shaft with different intervals are used for conducting grading screening on mushrooms, the screening process is easy to operate, manual screening is not needed, and the screening efficiency is improved.

The invention discloses an important node screening method for an active telemetering scene, and provides a comprehensive evaluation and optimization framework aiming at the problems of probe resource waste and overhigh system load caused by improper node selection in the existing telemetering technology. According to the method, network static topology features and dynamic state features are combined, a node importance scoring model is constructed through feature extraction, dimension reduction fusion and multi-task feature comprehensive analysis, and accurate selection of important network nodes is achieved. According to the method, topological information is analyzed through a weighted TOPSIS method to obtain spatial features, key dimensions of state features in stage historical telemetry data are extracted through principal component analysis (PCA), redundant data are remarkably reduced, and efficient state feature representation is generated. On the basis, a screening method combining spatial features and node state features is designed, and a screening strategy is dynamically adjusted through feature analysis of staged telemetering so as to optimize node priority ranking. The method is suitable for an active telemetering scene in a complex network environment, the capturing capacity of important events can be remarkably improved, system resource consumption is reduced, and the overall performance of an active telemetering system is comprehensively optimized.

The utility model relates to the technical field of slag powder production, and discloses a coarse sand screening device for granulated blast furnace slag powder production, which comprises a base, an obliquely arranged screening shell is arranged above the base, a grading screening net is fixedly arranged in the screening shell, and a first collecting hopper and a second collecting hopper are fixedly arranged at the bottom of the screening shell. Discharging hoppers are fixedly arranged at the bottom of the first collecting hopper and the bottom of the second collecting hopper correspondingly, the first collecting hopper and the second collecting hopper are elastically and movably connected with the base, vibration motors are fixedly arranged on the side wall of the first collecting hopper and the side wall of the second collecting hopper correspondingly, and a feeding pipe is fixedly arranged on one side of the top of the screening shell. A slag discharging pipe is fixedly arranged on one side of the bottom of the screening shell, and a switch valve is arranged on the pipe wall of the slag discharging pipe. A closed screening structure is adopted, the phenomenon that dust is exposed and pollutes the environment is avoided, the safety of people is guaranteed, meanwhile, the grading screening efficiency is high, and the production efficiency is improved.

This application relates to the technical field of cervical cancer screening medical devices. To integrate multiple screening methods, it provides a multifunctional integrated cervical cancer screening device and method, including a test tube holder, a tube removal and extraction mechanism, a constant temperature incubation chamber, a multi-channel liquid dispensing device, a micro-liquid dispensing device, and a peristaltic pump module. The test tube holder and the micro-liquid dispensing device are located on opposite sides of the constant temperature incubation chamber, while the tube removal and extraction mechanism, the multi-channel liquid dispensing device, and the peristaltic pump module are fixed to the upper end of the chamber. The test tube holder is used to fix test tubes containing cell fluid; the constant temperature incubation chamber is used to fix multiple glass slides; the tube removal and extraction mechanism is used to mix buffer solution with the cell fluid in the test tubes to form a cell suspension and extract it onto the glass slides; the multi-channel liquid dispensing device is used to add Papanicolaou staining reagents onto the glass slides; the micro-liquid dispensing device is used to add P16 immunocytochemical staining reagents onto the glass slides; and the peristaltic pump module is used to add other reagents.

The invention discloses a deep sea aquaculture net cage which comprises a buoyancy pedal, a plurality of air bags are arranged at the bottom of the buoyancy pedal and used for providing buoyancy and adjusting the height of the buoyancy pedal; the buoyancy ring is arranged at the bottom of the buoyancy pedal, a fishing net is fixedly connected to the bottom of the buoyancy ring, a bottom net is fixedly connected to the bottom of the fishing net, and a screening net is arranged in the bottom net in a lifting mode and used for shortening the height of the fishing net and screening fishes; by arranging a cleaning ring and a knocking rod, the rope can be cleaned when the rope is wound, impurities such as salt and seaweed can be removed, sounds can be generated by knocking a bell disc, fish schools can be repelled, and the screening efficiency is improved; due to the reciprocating motion of the first sliding block and the second sliding block, ordered arrangement of the ropes is ensured, the knotting phenomenon is prevented, and the service life of the ropes is prolonged; by arranging the feed scattering assembly, uniform scattering of fish feed is achieved, waste is reduced, and the utilization rate of the feed is increased.

The utility model relates to the technical field of bearings, and discloses a bearing ball size screening device which comprises a screening shell, one side of the outer surface of the screening shell is fixedly connected with one side of a supporting plate, one side of the upper surface of the supporting plate is fixedly connected with the lower surface of a first motor, and the other side of the first motor is fixedly connected with one end of a first transmission shaft. One side of the outer circumference of the first transmission shaft is fixedly connected with one side of the inner circumference of a transmission rod, the other side of the inner circumference of the transmission rod is fixedly connected with one side of the outer circumference of a limiting shaft, the other side of the outer circumference of the limiting shaft is slidably connected with one side of the inner surface of an annular rod, and one side of the outer surface of the annular rod is fixedly connected with one end of a push rod. According to the size screening device for the balls for the bearings, a first motor drives a transmission rod to rotate, the transmission rod drives an annular rod to move through a limiting shaft, and the annular rod drives a moving plate to move through a push rod, so that the effects of adjusting the size of a feeding opening according to different operation requirements and improving the practicability of the screening device are achieved, and the problems that traditional manual screening wastes time and labor are solved; and the operation efficiency is low.

The invention relates to the technical field of soil screening devices, and discloses a soil screening device for high-voltage porcelain insulator production. The soil screening device comprises a machine body, a feeding hopper, a first discharging opening, a second discharging opening and a third discharging opening; the first spring can push back the L-shaped block, the cam rotates at a high speed to repeatedly abut against the first screen so that the first screen can shake continuously, loose soil can be shaken and pass through the first screen, and impurities or stones mixed in the soil which cannot pass through can only be discharged through the first discharging opening formed in the side face. Even if soil blocks in the soil passing through the first screen mesh can be crushed under the action that the rotating shaft drives the crushing roller, so that only loose soil can pass through and fall onto the second screen mesh, and the situation that impurities or stones and the like in the soil are mixed in the soil to affect subsequent production of high-voltage porcelain insulators is avoided.

The invention relates to the technical field of human resources, in particular to a human resource management method based on artificial intelligence, and the method comprises the steps: receiving resume data of an applicant, analyzing the resume data through a natural language processing technology, and extracting keywords related to positions from the resume data to determine corresponding key information; calling a pre-linked external data source, and verifying the authenticity of the resume data providing information based on the external data source; and after verification succeeds, scoring the key information and the resume data by using a scoring model to obtain corresponding scoring data, and arranging interviews according to the scoring data. The recruitment efficiency can be improved.