45results about How to "Guaranteed screening efficiency" patented technology

The utility model relates to the field of screening equipment, in particular to a fine chemical engineering vibrating screening machine which comprises two stabilizing seats and two supporting plates, and the supporting plates are fixedly mounted on the stabilizing seats. The turnover mechanism is installed on the supporting plates on the two sides, a supporting groove is formed in the turnover mechanism, and a groove and a through opening for materials to pass through are formed in the supporting groove; the screening mechanism is mounted in the supporting groove; the top plate is fixedly connected with the supporting plates on the two sides and arranged on the upper sides of the supporting plates, and a feeding mechanism is fixedly arranged on the top plate; the two ends of the reinforcing plate are fixedly connected with the supporting plates on the two sides, the reinforcing plate is arranged on the lower sides of the supporting plates, and a collecting box used for storing screened materials is placed on the reinforcing plate. According to the fine chemical engineering vibrating screening machine, material screening work can be conducted, large materials can be conveniently guided out through overturning, meanwhile, the material adding speed can be controlled, the screening efficiency is guaranteed, meanwhile, equipment blockage is avoided, operation is easy, and practicability is high.

The present invention relates to the field of screening, and specifically provides a multi-stage ore screening device, which aims to solve the problem of reduced filtering efficiency and poor screening effect caused by filter blockage in current ore screening devices. The multi-stage ore screening device of the present invention includes a device housing and a reset component, a bending component, and a first filter plate group and a second filter plate group arranged up and down connected to the device housing. The device housing is formed with a feed chamber and a plurality of screening chambers connected to the feed chamber. The reset component can provide a pulling force to straighten the first filter plate group and the second filter plate group. The first filter plate group and the second filter plate group are provided with a bending component on their sides. The bending component can overcome the pulling force provided by the reset component to the first filter plate group or the second filter plate group and fold the two adjacent first filter plates or the second filter plates to one side, so as to clean the filter plates by beating and vibrating, avoid clogging the filter holes with ores, and ensure the screening effect.

According to the vibrating screen, a first-layer screening mechanism and a second-layer screening mechanism are installed on the top and the upper portion of a rack in parallel up and down, each of the first-layer screening mechanism and the second-layer screening mechanism comprises a screen frame, an upper screen, a lower screen and an adjusting assembly, a sliding groove is formed in the middle of each screen frame, and the screen frames are installed on the rack; the upper screen is fixed at the upper end of the screen frame; the lower screen is installed in the sliding groove. The adjusting assembly comprises a driving motor, a lead screw and a moving nut. The driving motor drives the moving nut through the lead screw to drive the lower screen to move relative to the upper screen. The first blowing mechanism and the second blowing mechanism are the same in structure and are arranged below the first-layer screening mechanism and the second-layer screening mechanism respectively, and a plurality of air nozzles are evenly arranged on the portions, corresponding to the screening nets, of the screening mechanisms. According to the vibrating screen, the size of the screening hole diameter can be flexibly adjusted according to needs, and the screening requirements of materials with various particle sizes can be met through one vibrating screen.

The utility model relates to the technical field of agricultural product screening devices, and discloses an agricultural product primary processing screening device convenient to clean, which comprises a shell I, a screen is arranged in an inner cavity of the shell I, a vibration motor is fixedly mounted at the bottom of the screen, and fillets are fixedly mounted at the bottom of the screen and located on the left side and the right side of the vibration motor respectively. Grooves are formed in the bottoms of the fillets, sliding grooves are symmetrically formed in the left portion and the right portion of an inner cavity of the first shell, cavities are formed in the bottoms of the sliding grooves, electromagnets are fixedly installed at the bottoms of inner cavities of the cavities, springs are fixedly installed at the positions, located on the left sides and the right sides of the electromagnets, of the bottoms of the inner cavities of the cavities correspondingly, and movable plates are fixedly installed at the telescopic ends of the springs; and through clamping of an electromagnet power-on and power-off adjusting limiting block and a groove, the screen mesh is convenient to disassemble and assemble, so that the screening mechanism is cleaned, a large amount of time is prevented from being consumed, the working efficiency of the device is prevented from being influenced, maintenance of the device is facilitated, the maintenance efficiency is improved, and the failure rate of the device is reduced.

The present invention relates to the technical field of positioning pin sleeve processing, and discloses an automatic material distribution mechanism for positioning pin sleeves, comprising a feeding mechanism, a positioning pin and a pin sleeve. A screening mechanism capable of screening out vertically positioned pin sleeves is provided on one side of the feeding mechanism, and a pin sleeve assembling mechanism capable of assembling the positioning pin and the pin sleeve is provided on one side of the screening mechanism. The beneficial effect of the present invention compared with the prior art lies in that: by setting a plurality of hoppers and connecting them with auxiliary material distribution slots to carry the pin sleeves, a plurality of auxiliary material distribution slots can work simultaneously to store the screened pin sleeves when screening the pin sleeves, that is, when a pin sleeve gap appears on the main material distribution slot, the auxiliary material distribution slot selection blocks can be rotated in turn to allow the pin sleeves on each auxiliary material distribution slot to be quickly and sequentially transported to the main material distribution slot, which can avoid the situation where the assembly of the pin sleeves and the positioning pins is stagnant under high production demand, affecting the assembly output speed of the positioning pins and the pin sleeves, thereby ensuring production efficiency.

The invention provides a new energy power station planning method and system, and the method comprises the steps: obtaining the static characteristics of a plurality of candidate points, the static characteristics including the seismic activity frequency, the altitude, the gradient and the underground water burial depth; calculating a static abnormal score of each candidate point based on the static features of the candidate points, and performing a first round of screening on all the candidate points according to the static abnormal scores to obtain remaining candidate points; obtaining dynamic characteristics of each residual candidate point, wherein the dynamic characteristics comprise wind speed, sunlight intensity, environment temperature, environment humidity and precipitation; and performing a second round of screening on all the remaining candidate points based on the dynamic feature of each remaining candidate point and the static abnormal score of each candidate point to obtain a final point location. According to the method, multi-dimensional quantitative evaluation of new energy power station site selection is realized through a static and dynamic dual screening and clustering optimization mechanism, and site selection scientificity and engineering reliability are remarkably improved.

This utility model discloses a mixing and grading device for high-purity graphite processing, relating to the field of high-purity graphite processing technology. It includes a base, a screening tank on top of the base, a tank door on one side of the screening tank, and two mounting rails on both the inner wall of the screening tank and the tank door. Two mounting shells are installed inside the screening tank. This utility model uses a vibration motor to vibrate the screening tank. The graphite material on the top screen is gradually seeped downwards through the mesh openings due to the vibration. Larger particles of graphite are trapped on the top screen, while smaller particles are trapped on the second screen. Powdered graphite material on the screens seeps through the mesh openings of both screens into a collection frame for collection and storage. Removing the mounting shells from the mounting rails allows for cleaning of the screens, ensuring no graphite material clogs the mesh openings and guaranteeing efficient subsequent screening.

The application relates to the field of blueberry screening, and discloses a blueberry sorting device which comprises a workbench, a material distributing device, a screening mechanism and a conveying mechanism. A plurality of parallel guide grooves are formed on the workbench. The material distributing device is installed at one end of the workbench and comprises a storage hopper and a sliding plate connected to the bottom of the storage hopper. A discharge port aligned with each guide groove is installed in the sliding plate. The workbench under the guide grooves is hollow. The screening mechanism is installed in the workbench in the length direction of the guide grooves in sequence. The screening mechanism drives the blueberries away from the material distributing device. A dropping port is formed on the workbench under the guide grooves. The conveying mechanism is located below the dropping port. The screening mechanism is arranged on the workbench, different sizes of blueberries can be dropped from different dropping ports, and the damage of the blueberries caused by mutual extrusion and extrusion with the screen holes during screening can be avoided, so that the waste rate of the blueberries is greatly reduced, and the economic benefits of the blueberries are effectively ensured.

The utility model discloses a PVC granule cooling vibration sieve relates to PVC granule processing technical field, the utility model discloses a cooling sieve box and controller, the controller fixed mounting is at the cooling sieve box front surface, and the both opposite surfaces of cooling sieve box all are established with two opening grooves, and the both opening grooves between sliding installation have the sliding board, and two sliding boards both ends extend to the outside of cooling sieve box through the opening groove, and the both sliding boards upper surfaces all are established with the installation groove, and the both installation grooves inside all are installed with the screening net, and the cooling sieve box one surface is installed with two mounting sleeves through bolt, and the position of two mounting sleeves corresponds with the position of two sliding boards. The utility model discloses through sliding board, return spring and eccentric wheel structure, make two sliding boards and screening net move back and forth fast in horizontal direction, realize the transverse vibration of screening net, and when the accumulation of PVC granule can be dispersed screening through the fast transverse vibration, guarantee the screening efficiency of device.

The utility model relates to screening device technical field especially relates to a kind of steel fibre screening machine.Its technical scheme includes: receiving hopper, connecting cover, electric push rod and support cover, the support cover is provided on receiving hopper upper end outer wall, the support cover outer wall is equipped with the fixed plate of circular array distribution, the support cover upper end outer wall is provided with connecting cover, the connecting cover lower end outer wall is equipped with the inlay block of circular array distribution, the connecting cover inner wall one side is equipped with screening board, the connecting cover inner wall one side lower end is equipped with electric push rod, the electric push rod upper end outer wall is equipped with motor body, the motor body upper end outer wall is provided with support disc, the support disc outer wall is equipped with the top plate of circular array distribution, by setting electric push rod, motor body and top plate, reached the effect of cleaning screening hole, guarantee the cleanness inside screening hole, guarantee the screening efficiency of workpiece through screening hole.

The utility model provides a biomass particle screening device which relates to the technical field of biomass particles and comprises a base, rotating seats are symmetrically and fixedly connected to the top of the base, a screening drum is rotatably connected between the inner surfaces of the two rotating seats, a first gear is fixedly connected to the outer surface of one side of the screening drum, and a second gear is fixedly connected to the outer surface of the other side of the screening drum. And the outer surface of one rotating seat is fixedly connected with a motor, the output end of the motor is fixedly connected with a second gear, and an auxiliary assembly is arranged between the tops of the two rotating seats. In the screening process and the rotating process of a first gear, a transmission gear can be driven to rotate, so that a connecting rod and a cam rotate along two connecting bases, a push block is pushed in a reciprocating mode, and under the action of a spring and a sliding rod, a knocking block is driven to move up and down in a reciprocating mode to knock a screen drum in a reciprocating mode; biomass particles blocked in meshes of the screen drum are knocked off, and the screening efficiency is guaranteed.

The application belongs to the technical field of quartz sand processing, in particular to a fine crushing and multi-stage purification process for preparing ultra-high-purity quartz sand, which comprises a machine body, a fixed frame is fixedly connected to the upper surface of the machine body, a feeding port is formed in the fixed frame, a first motor is arranged below the machine body, a crushing roller is drivingly connected to the output end of the first motor, auxiliary plates are fixedly connected to the inner wall of the feeding port on both sides, tooth gears are fixedly connected to one side of the auxiliary plates and staggered with the tooth gears on the circumferential surface of the crushing roller, the auxiliary plates are used for assisting the crushing roller to crush quartz sand, a purification cavity is fixedly connected to the middle of the machine body, and a sieve plate is elastically connected in the purification cavity, through the hooking assembly and the blockage cleaning assembly, the problem that the existing screening is blocked and the screening efficiency is reduced is solved, and the problem that the falling is slow during the screening process is solved.

This utility model relates to the field of plastic bucket production technology, specifically a raw material screening machine for plastic bucket production. It includes: a machine body, comprising a vibrating screener with a screening disc on its surface; and a uniform feeding mechanism, including a fixing rod fixedly connected to the surface of the vibrating screener. This utility model, through the connection between the fixing rod and the feeding hopper, allows the raw materials for plastic bucket production to be evenly fed into the hopper. The connection between the cross-shaped fixing frame and the anti-clogging cone prevents clogging. The connection between the drive motor and the scraper allows the drive motor to rotate the scraper, preventing raw materials from adhering to the surface of the anti-clogging cone. The connection between the protective box and the drive motor allows the drive motor to rotate the rotating roller. The connection between the rotating roller and the dividing plate allows the raw materials to be evenly grouped and fed into the machine, thus improving screening efficiency.

The utility model discloses a ceramic tile micro powder ball-milling, screening and returning device which comprises a supporting frame, a ball mill is installed at the top of the supporting frame, a feeding hopper is installed on the left side of the ball mill, and a material receiving pipe penetrating through and extending to the lower portion of the supporting frame is fixedly installed at the top of the supporting frame. A conveying pipe is fixedly installed on one side of the supporting frame in an inclined mode, an auger conveyor is installed in the conveying pipe, and a material receiving frame is fixedly installed on the lower portion of the auger conveyor. According to the ceramic tile micro-powder ball-milling screening and returning device, through the arrangement of the conveying pipe, the material receiving frame, the screen and the like, micro-powder can be screened through the screen, qualified micro-powder and unqualified micro-powder are effectively separated, and through the arrangement of the material receiving frame, the screen, the conveying pipe, the auger conveyor and the like, the quality of the ceramic tile micro-powder is improved. According to the feeding device, unqualified raw materials can be rapidly returned to the feeding hopper through the conveying pipe and the auger conveyor and can be ground again through the ball mill, the material returning speed is increased, and full utilization of the raw materials is achieved.

The utility model discloses a capsule production raw material screening device which comprises a box body, an electric control device is fixedly connected to the outer wall of the box body, a plurality of supporting legs are fixedly connected to the outer wall of the bottom of the box body, a feeding channel is fixedly connected to the top of the box body, and a feeding screening mechanism is arranged at the bottom of the feeding channel. A treatment box is arranged on the inner wall of the box body, a plurality of first screening holes are formed in the bottom of the treatment box, a stirring screening mechanism is arranged on the inner wall of the treatment box, and a discharging cover plate is rotationally connected to the outer wall of one end of the bottom of the box body. Raw materials can be guided into the box body through the feeding channel arranged at the top of the box body, the raw materials can be screened and refined through the feeding screening mechanism arranged at the bottom of the feeding channel, the quality of the raw materials is guaranteed, the raw materials can be further screened through the processing box, and the processing efficiency is improved. By arranging the stirring and screening mechanism in the treatment box, stirring and screening treatment can be conducted in the treatment box.

The application relates to a fine sand screening device for special mortar production and relates to the technical field of special sand production. The device comprises a screening box, a raw material box is communicated with a feeding opening of the screening box, a sieve plate is arranged in the screening box, the sieve plate is arranged obliquely, a sand outlet is formed in an inner wall of a lower end of the screening box close to the sieve plate, a grinding mechanism is communicated with the sand outlet, a receiving plate is arranged below the sieve plate, the receiving plate is arranged obliquely, and a collecting opening is formed in an inner wall of a lower end of the screening box close to the receiving plate. The application has the effects of realizing fine sand screening work in the special mortar production process and improving the quality of the special mortar.

The utility model discloses a multistage gravel screening device, which relates to the technical field of screening equipment and comprises a shell, a feeding pipe is fixedly mounted on the upper surface of the shell, and a first screen, a second screen and an anti-blocking unit for cleaning the first screen and the second screen are fixedly mounted in the shell. The device has the beneficial effects that a motor, a screw rod and a sliding block drive a mounting frame to move along a first screen and a second screen, a hydraulic cylinder drives a top plate and top teeth to move, and the top plate and the top teeth push the first screen and the second screen, so that the first screen and the second screen deform and protrude to a certain extent; according to the device, the first screen mesh and the second screen mesh are arranged, so that materials on the first screen mesh and the second screen mesh are dispersed, the materials can be better screened, sand and stones blocked on the first screen mesh and the second screen mesh are separated, the passing ability of the materials on the first screen mesh and the second screen mesh is effectively prevented from being affected, and the sand and stone screening efficiency of the first screen mesh and the second screen mesh is guaranteed.

The present application belongs to the technical field of bacteria group compatibility, and particularly relates to a bacteria group compatibility method and system based on target efficacy prediction. The method collects target parameters and calculates their efficacy in different bacteria groups, divides the efficacy into positive efficacy and negative efficacy according to the change trend of the target parameters, and calculates and obtains an efficacy total value that can comprehensively reflect the comprehensive action of the bacteria groups; each candidate bacteria group is sequentially set as a target bacteria group, and the remaining bacteria groups are taken as compatibility bacteria groups for systematic comparison; the compatibility bacteria groups and the target bacteria groups are screened and sorted according to the compatibility difference, and a compatibility scheme is generated. The present application can more comprehensively and objectively reveal the real comprehensive performance of the bacteria groups by distinguishing and aggregating the positive and negative efficacies, thereby improving the accuracy and reliability of the target efficacy prediction, and classifying and iteratively comparing on the basis of objective data to ensure the objectivity and repeatability of the screening process, and at the same time, ensure the screening efficiency.

The utility model relates to building waste treatment technical field, concretely is a kind of building interior decoration waste classification and recovery device, including multiple support legs, the top of multiple support legs is fixedly connected with support plate, the surface of support plate is rotatably connected with screening cylinder, the surface sliding connection of both ends of support plate has moving block, the surface sliding connection of moving block has fixed plate, the surface of fixed plate is rotatably connected with shaft, the surface of shaft is inserted with connecting shaft, two connecting shafts are fixedly connected with brush, and the surface of brush is attached in screening cylinder;Beneficial effects are that: the outer surface of screening cylinder is provided with brush, can clean the decoration waste particles attached on screening cylinder, prevent waste from plugging sieve hole, ensure the screening efficiency and effect of screening cylinder, by the cooperation of manual screw rod, moving block and fixed plate, the distance of brush and screening cylinder can be flexibly adjusted to change cleaning intensity, further improve screening effect and efficiency.

The utility model discloses an anti-accumulation screening device, and relates to the technical field of screening, the anti-accumulation screening device comprises a screening machine base and a screening cylinder, the screening machine base has a certain inclination, the left side and the right side of the upper surface of the screening machine base are fixedly provided with arc-shaped supporting bases, and the arc-shaped supporting bases are arranged on the screening cylinder. Sliding grooves are formed in the positions, corresponding to the two arc-shaped supporting bases, of the outer surface of the screening barrel, the two arc-shaped supporting bases are slidably installed in the two sliding grooves correspondingly, a driving device is arranged on the front side of the upper surface of the screening machine base, and a screening device is arranged in the screening barrel. By arranging the fixed cylinder, the supporting rod, the rotating cylinder, the rectangular hole, the first screening hole, the second screening hole, the third screening hole, the fourth screening hole and the moving rod, the proper screening hole is selected for use according to the size of materials needing to be screened, the situation that the materials are difficult to pass through due to the too small screening hole is avoided, the stacking possibility is reduced, and the practicability of the device is improved.

The utility model discloses a silicon block crushing and screening device, and mainly relates to the field of silicon block crushing. Comprising a screening box, a feeding port is formed in the top of the screening box, a discharging port is formed in the bottom of the screening box, a plurality of screening plates sliding in the transverse direction are arranged in the screening box, a power shaft for driving the screening plates to slide is arranged on one side of the screening box, a fence is arranged on the side face, located in the screening box, of each screening plate, and an extension spring is arranged between one end of the fence and the side wall of the screening box; a plurality of material distribution openings are formed in the side face of the screening box, one ends of the screening plates penetrate through the material distribution openings and are in sliding connection with the material distribution openings, and inclined discharging plates are arranged at the material distribution openings. The screening device has the advantages that the technical problem that large-particle silicon blocks are gathered on the screening plate and affect the screening effect after long-term use can be solved, the screened large-particle silicon blocks are separated from the screening plate in time, screening holes in the screening plate are prevented from being blocked, and the screening efficiency under the long-term use condition is guaranteed.

The invention belongs to the technical field of particle crushing, and particularly relates to a double-roller crushing device for fine particle production, the double-roller crushing device comprises a crushing roller position sensing mechanism, a self-vibration screening mechanism and a crushing driving mechanism, the self-vibration screening mechanism is arranged on the crushing roller position sensing mechanism, and the crushing driving mechanism is arranged on the crushing roller position sensing mechanism. The self-vibration screening mechanism and the crushing driving mechanism are provided, sliding of the screen can be automatically controlled through a mechanical control mode when the rollers are separated and make contact with each other again, and therefore the technical effect that materials are screened only when the rollers are separated is achieved.

This utility model discloses a screening device for producing high-slag-erosion-resistant iron trough castable, specifically relating to the technical field of screening equipment. It includes a driving component for driving a screen frame to screen the iron trough castable. The driving component comprises two screws respectively located on both sides of the screen frame, with the screws externally fixed to the screen frame via a buffer component. A movable shaft is located at the bottom of the buffer component. This utility model uses a servo motor to drive the screws to rotate. The screws drive the movable shaft to rotate synchronously via a first pulley, a belt, and a second pulley. Thus, when the screws drive the moving seat to reciprocate the screen frame, the movable shaft drives a lever to repeatedly move a spring-limited connecting plate up and down. This causes the material on the screen plate to not only be pushed but also thrown up and fall freely due to the up-and-down movement of the screen plate, creating a compound vibration. This also increases the collision efficiency between the material and the screen frame, achieving the purpose of breaking up material agglomeration and preventing screen frame blockage.

The utility model relates to the technical field of negative pressure screen analysis instruments, and provides an autoclaved aerated concrete block negative pressure screen analysis instrument which comprises a negative pressure screen analysis instrument body, an airflow pipeline, a pipeline cleaning mechanism, a water pump, a pipeline drying mechanism and a ventilation sleeve. The pipeline cleaning mechanism is installed in the negative pressure screen analysis instrument body, the output end of the water pump is communicated with the airflow pipeline, the pipeline drying mechanism is installed in the negative pressure screen analysis instrument body, and the two ventilation sleeves are rotationally connected to the two ends of the airflow pipeline respectively. The problems that during the process, small powder is pumped away, the small powder continuously passes through an airflow pipeline, part of the powder is attached to the interior of the airflow pipeline, raw materials are wasted, the pipeline is difficult to clean, too much powder is accumulated, the pipeline is blocked, and the screen analysis effect is affected are solved.

The vibrating screen comprises a screening mechanism and a blockage removing mechanism, the screening mechanism comprises a stock bin, a screen arranged in the stock bin and a vibrator located on the stock bin and driving the stock bin to vibrate, a feeding port is formed in the top of one side of the stock bin, a discharging port is formed in the other side of the stock bin, and the screen is arranged in a downward inclined mode from the feeding port to the discharging port. A first tray is arranged below the screen and is used for receiving qualified soy sauce grains screened by the screen, and a second tray is arranged below the discharge port and is used for receiving unqualified soy sauce grains screened by the screen; the blockage clearing mechanism comprises a first air cylinder fixedly arranged at the top of the stock bin, a mounting plate arranged on a telescopic rod of the first air cylinder and a plurality of pricking needles arranged at the bottom of the mounting plate, one pricking needle corresponds to one mesh in the screen, and the first air cylinder drives the mounting plate to ascend and descend so that the pricking needles can prick into the meshes of the screen to clear blockage. According to the vibrating screen, blockage of the screen cloth can be quickly cleaned, and the screening efficiency is kept.

The multi-layer vibrating screen structure convenient to clean comprises a screen box body, a vibrating mechanism, a rack and a buffering mechanism, a feeding port is formed in the upper end of a screen box, a discharging box body is arranged at the lower end of the screen box, a plurality of layers of screens are arranged in the screen box, and a plurality of auxiliary cleaning holes used for cleaning impurities on each layer of screen are formed in the screen box and the discharging box body. Through the structural design of the multiple auxiliary cleaning holes, impurities such as weeds, wood chips and stones on each layer of screen can be cleaned in time, concentrated accumulation of the impurities is avoided, and therefore the screen is prevented from being blocked, and the screening efficiency and the screening quality of the screen are guaranteed; impact and abrasion of the impurities to the screen can be reduced by cleaning the impurities in time, the service life of the screen is prolonged, and the use cost and the maintenance cost of the screen are saved.

The utility model discloses a pet food production particle screening machine which comprises a fixed frame, the fixed frame is arranged in an inclined mode, supporting legs are arranged at the bottom of the fixed frame, a movable frame is hinged to the fixed frame, a driving assembly is arranged between the movable frame and the fixed frame, a screening basket is arranged above the movable frame, and the screening basket is arranged above the fixed frame. A spring is arranged between the movable frame and the screening basket, a screen is arranged at the bottom of the screening basket, and a vibration motor is arranged on the screening basket. According to the particle screening machine for pet food production, through the arrangement of the fixed frame, the movable frame and the driving assembly, the angle of the screen can be adjusted according to the humidity degree of pet food and the amount of disintegrating slag, the falling speed of the pet food during screening is selected, and the integrity and screening efficiency of the pet food are guaranteed.

This utility model belongs to the field of screen technology and discloses a detachable double-layer screen, including an inner screen unit, an outer screen unit, and a screen body unit coaxially sleeved between the inner and outer screen units. A rotating shaft passes through the center of the screen body unit. Both the inner and outer screen units contain more than two arc-shaped screen units, which are detachably spliced ​​around the center of the screen body unit to form a double-layer cylindrical screen. The screen body units are evenly spaced on the rotating shaft and combined with the corresponding double-layer cylindrical screen to form a complete screen. A screen cover is provided on the left side of the complete screen, and support rods are evenly distributed on the outer circumference of the screen body unit. A trumpet-shaped discharge port is provided on the right side of the complete screen. This utility model can quickly replace the screen, reduce the overall screen replacement production cost, and the two screens form a multi-stage filtration. High-pressure air is blown from the inside of the screen to the outside to remove impurities and salt blocks adhering to the screen and assist in the removal of debris.

This utility model relates to the field of screening technology and discloses a drum screener for preparing bio-organic fertilizer. The drum screener includes a main body with a frame and a screen cylinder. An extension frame is fixedly installed on the upper side of the frame, and an electric screw module is fixedly installed on the extension frame. An arc-shaped cover is fixedly installed on the lower side of the slide of the electric screw module via a connecting seat. An air jet assembly is installed inside the arc-shaped cover. A hot air blower is fixedly installed on the upper side of the slide of the electric screw module, and the hot air blower is connected to the air jet assembly via a bent pipe. A pair of guide wheels are rotatably mounted on the arc-shaped cover via a vibration assembly. The guide wheels are located inside the lower part of the arc-shaped cover, and the lower sides of the guide wheels abut against the outer circumference of the screen cylinder. This utility model, through a composite unblocking mechanism of airflow stripping and mechanical vibration, can significantly improve the unblocking effect and ensure screening efficiency, and is suitable for organic fertilizer production conditions with different viscosity and humidity.

The utility model discloses a potato grading screening device which comprises a mounting table, a coarse screen and a fine screen, a rotating column is rotatably mounted on the top face of the mounting table, a first rotating disc and a second rotating disc are mounted on the outer side of the rotating column, and a plurality of mounting holes are formed in the surface of the second rotating disc. The coarse screen and the fine screen are installed in different installation holes correspondingly, a plurality of containing boxes are installed on the top face of the first rotating disc, a driving assembly used for driving a rotating column to rotate is installed on the top face of the installation table, a supporting rod is installed on the outer side of the installation table, and a transverse plate is installed at the upper end of the supporting rod. A sliding plate is slidably mounted on the outer side of the transverse plate, and a limiting frame is mounted at one end of the sliding plate. The moving assembly can drive the limiting frame to shake, so that potatoes are driven to shake, the potatoes can be rapidly screened, the coarse screen, the fine screen and the empty mounting holes are controlled to move to the position below the limiting frame, and then the potatoes are subjected to multi-stage screening.