CN110404756B - Screening classification equipment with high yield and easy maintenance - Google Patents

Abstract

The invention discloses a screening and grading device with high yield and easy maintenance, and belongs to the technical field of mechanical equipment. The invention adopts a structure that two sets of external transmission devices synchronously operate, the operation is stable, reliable and easy to maintain, simultaneously, a large amount of internal space of the screen body is saved, the optimization design of the screen path is convenient, and the productivity is improved. According to the invention, a multi-channel feeding sieve path structure is adopted, the sieve lattices and the sieve frame are of a pull structure, the sieve door is hinged, the sieve lattices and the sieve frame can be compressed after the sieves are closed through the compression handle, the oil drainage layer is added on the bottom plate of the sieve frame, the rack is of a movable connection structure, the pulse valve is connected with external high-pressure gas, periodic automatic gas injection cleaning of the sieve mesh is realized, various optimization designs are adopted, the productivity is improved, the operation and the installation are convenient, and the maintenance difficulty is reduced. The screening and grading equipment provided by the invention has the characteristics of high productivity and easiness in maintenance.

Description

High-yield screening and grading equipment easy to maintain

Technical Field

The invention belongs to the technical field of mechanical equipment, and particularly relates to a high-yield and easy-maintenance screening and grading device which is widely applicable to screening, grading and impurity removal of powder or granular materials in the industries of flour processing, food, pharmacy, feed, chemical industry, mines, alcohol, starch and the like.

Background

In the powder and feed industry, powder or granular materials are often screened, classified and purified by means of screening and classifying equipment so as to meet the requirements of various materials. The yield, the efficiency and the grading effect of the screening and grading equipment are key performance indexes of the whole processing assembly line, if the yield is not enough or the grading effect is not good, the smooth proceeding of the subsequent processing and manufacturing process is seriously influenced, and the use experience of customers is further influenced.

At present, most screening and grading equipment in the market has the following defects:

(1) the sieve lattice is difficult to disassemble and replace, is inconvenient to maintain and clean: the traditional sieve lattices often adopt a whole-bin superposed structure, are fixed on or in a sieve body in a mode of combining horizontal compression and vertical compression, and if faults such as sieve pasting, material blocking, material leakage or damage occur, the sieve lattices are required to be completely disassembled, the sieve lattices are cleaned layer by layer or are eliminated and checked layer by layer, the maintenance cost of equipment is high, the production efficiency is low, and the normal operation of the whole production line is also severely restricted.

(2) The built-in transmission device occupies large space inside the screen body, is unstable in operation and difficult in maintenance: conventional screening and grading equipment basically employs a set of internal transmission devices, which are usually arranged inside a screen body. On one hand, the transmission device occupies a large amount of internal space of the screen body, influences the arrangement of the screen grids and the screen paths in the screen body and the design of the discharge hole of the screen body, and also influences the improvement of the production efficiency and the productivity of equipment; on the other hand, because only one set of transmission device is provided, the stress is concentrated on one side of the screen body when the equipment operates, so that the local stress of the equipment is concentrated and is easy to damage, and a large potential safety hazard exists; meanwhile, when the transmission device needs to be maintained, the transmission device can be opened and the related parts are detached, so that the operation is complex, the workload is large, the maintenance period is long, and the precision and the service life of the transmission part can be influenced by frequent detachment and installation.

(3) The material flows along a single way and a single direction or multiple ways and the material distribution is uneven: in traditional sieve reason equipment, the material gets into the screen frame from the feed inlet and generally flows along single way folk prescription or multichannel folk prescription, and the material that distributes on every way sifter like this is many, and inhomogeneous, and the screening effect is poor, screening efficiency is low.

Disclosure of Invention

The invention aims to provide the screening and grading equipment with high yield and easy maintenance aiming at the defects of the prior art. The external transmission device can achieve the technical effects of large internal space of the screen body, optimized screen path arrangement, convenience in maintenance, stable operation, safe use, high production efficiency and the like; meanwhile, the invention adopts the layered arrangement and the zigzag arrangement of the sieve grids, and is matched with a reasonable material homogenizing mechanism, so that the materials can uniformly enter the sieve surfaces of different sieve grids along multiple paths in two directions, the material distribution quantity of each layer of sieve grid is reduced and balanced, and the sieving efficiency and the productivity are improved; the screen frame, the screen lattices and the rotary opening and closing screen door with the drawing structure are convenient to clean the screen lattices and the screen frame, can realize sealing and pressing, and are simple to operate and flexible to use.

The purpose of the invention is realized by the following technical scheme:

the invention relates to a high-yield easy-maintenance screening classification device which comprises a frame, a screen body which is hung on the frame through a steel cable, a plurality of layers of screen lattices and screen frames which are arranged in an inner cavity of the screen body in a pulling mode (the screen lattices and the screen body are in a pulling and pulling combined mode, and the screen lattices and the screen body are convenient to rapidly disassemble, assemble, clean and maintain), a feed inlet which is arranged at the top of the screen body, a material homogenizing mechanism (which is used for receiving materials and guiding the materials to the layered screen lattices at two sides and plays a role of uniform feeding) which is arranged right below the feed inlet, a screen underflow discharge outlet which is arranged at the center of the bottom of the screen body, an screen underflow discharge outlet which is arranged at the bottom of the screen body and is adjacent to the screen underflow discharge outlet (after the materials enter the feed inlet, the materials are respectively uniformly distributed to the upper screen lattices through the left side and the right side by the material homogenizing mechanism, and the multipath structure is favorable for improving the screening efficiency and the yield of the device The material which is not sieved enters a discharge port of the oversize material through the upper sieve lattice and the lower sieve lattice), two sieve doors which are connected with the front end and the rear end of the sieve body through hinges and are rotationally opened and closed (the sieve doors can be opened to assemble and disassemble the sieve lattices and the sieve frames and are cleaned and maintained, and the sieve doors can be closed to realize sealing and respectively compress the sieve lattices and the sieve frames), and an external transmission device which pushes the sieve body to do planar rotary circular motion (the external transmission device can save a large amount of internal space of the sieve body, and is convenient for the optimized arrangement of the sieve lattices, the discharge port and a sieve path in the sieve body; the maintenance is convenient, the maintenance period is prolonged, and the service life of the transmission part is prolonged; stable operation, safe use and high production efficiency), and pulse valves fixedly arranged on the sieve doors at the two sides (after the pulse valves are connected with external high-pressure gas, the high-pressure gas can be periodically and automatically sprayed to the surfaces of the sieve lattices, so that the function of automatically cleaning the sieve surfaces without stopping the machine is achieved); the sieve grids are divided into an upper sieve grid and a lower sieve grid, the upper sieve grid is of a multilayer slope structure which is symmetrically arranged at the front end and the rear end of the refining mechanism, the communicating end with the refining mechanism is a high end, the lower sieve grid is of a multilayer structure which is arranged in a zigzag manner, and the discharging end of the lowest layer in the lower sieve grid is communicated with the discharging port of the oversize material; the external transmission device comprises a driving transmission assembly and a driven transmission assembly which are arranged on the left side and the right side of the screen body and combined through a synchronous mechanism assembly, and a power device which is connected with a belt transmission assembly and a driving belt transmission assembly at the input end of the driving transmission assembly.

The driving transmission assembly and the driven transmission assembly respectively comprise a bearing seat internally provided with a bearing, a transmission shaft with two ends penetrating through the bearing seat and a weight block fixedly sleeved in the middle of the transmission shaft (the bearing seat supports the transmission shaft on one hand, and fixes the driving transmission assembly and the driven transmission assembly on the outer side of a screen body on the other hand; the axes of the transmission shafts in the driving transmission assembly and the driven transmission assembly are parallel to each other and are coplanar (the torque can be effectively eliminated, and the stable operation of the whole machine is ensured); the eccentric weights in the driving transmission assembly and the driven transmission assembly are of the same fan-shaped structure, and the two eccentric weights are the same in installation position and installation direction (the eccentric weights on the two sides of the screen body are guaranteed to rotate to generate the same centrifugal force direction, and the screen body is guaranteed to be stable).

The synchronous mechanism component consists of a synchronous belt and two synchronous belt wheels; a synchronous pulley is installed at the output end of a transmission shaft in a driving transmission assembly, another synchronous pulley is installed at the same side input end of the transmission shaft in a driven transmission assembly, and a synchronous belt is sleeved on the outer tangent surfaces of the two synchronous pulleys (the two synchronous pulleys are matched with a synchronous belt to realize the homodromous and synchronous operation of the transmission shaft and a weight block in the driving transmission assembly and the driven transmission assembly, and centrifugal force is provided to drive a screen body to do plane rotation circular motion).

The synchronizing mechanism component consists of a cardan shaft and two gear boxes; one gear box is arranged at the output end of a transmission shaft in the driving transmission assembly, the other gear box is arranged at the input end of the same side of the transmission shaft in the driven transmission assembly, and the universal shafts are connected between the two gear boxes (the two gear boxes are matched with the universal shafts to realize the homodromous and synchronous operation of the transmission shafts and the eccentric weights in the driving transmission assembly and the driven transmission assembly, and provide centrifugal force to drive the screen body to do plane rotation circular motion).

The belt transmission assembly comprises a belt wheel I connected with the output end of a power device, a belt wheel II connected with the input end of a driving transmission assembly and a matched triangular belt (the power device drives the belt wheel I to rotate, the belt wheel I drives the belt wheel II to rotate through the triangular belt, and the belt wheel II drives a transmission shaft in the driving transmission assembly to rotate).

The frame is composed of four frame upright posts, two frame cross beams, two frame longitudinal beams and eight pairs of connecting flanges; the frame beam is fixed above the frame column through four pairs of connecting flanges (the connecting flanges can increase the stress area and improve the understanding reliability, realize bolt connection and avoid welding stress), the frame longitudinal beam is fixed on the frame beam through four pairs of connecting flanges in a vertical lap joint manner, and an upper hanging device (the upper hanging device is used for fixing the upper end of a steel cable and is matched with the steel cable to realize hanging) is installed on the outer side of the frame longitudinal beam.

The screen body is formed by taking a screen body frame as a keel and sealing the outside by a side plate; and a lower hanging device is arranged at the position which is arranged outside the screen body and is vertically aligned with the upper hanging device (the lower hanging device is used for fixing the upper end of the steel cable and is matched with the steel cable to realize hanging).

The inner surface of the sieve door is provided with a pressing device for respectively pressing the sieve frame and the sieve lattices (when the sieve door is closed, the pressing device presses the sieve frame and the sieve lattices), and the periphery of the inner surface of the sieve door is provided with a sealing strip (to prevent dust from overflowing).

The material homogenizing mechanism comprises a ridge type punching plate horizontally arranged right below a feed inlet, two first layer material separating plates vertically and symmetrically arranged on the lower surface of the ridge type punching plate and extending downwards to the surface of a first layer of sieve lattice in an upper sieve lattice, two second layer material separating plates vertically and symmetrically arranged on the lower surface of the ridge type punching plate and extending downwards to the surface of a second layer of sieve lattice in the upper sieve lattice, and a third layer material separating box plate located in the center of the bottom of a flow distributing cavity; the first layer material separating plate and the second layer material separating plate are vertically arranged in a parallel and spaced mode to divide the blanking area of the ridge type punching plate into five large areas, wherein the material falling along the middle blanking area is further divided by the horizontally placed third layer material separating box plate to the surfaces of two third layer sieve lattices in the upper sieve lattices (to receive the material and guide the material to the sieve lattices at two sides to play a role of uniform feeding, namely when the material falls from the feeding port onto the ridge type punching plate, the material uniformly falls from the punching hole, the falling material at the outermost side respectively enters the front and rear first layer sieve lattices in the upper sieve lattices under the blocking action of the left and right first layer material separating plates, the falling material at the central area is blocked by the two second layer material separating plates, enters the bottom of the flow dividing cavity and is divided by the third layer material separating box plate and then respectively enters the front and rear third layer sieve lattices in the upper sieve lattices, and the falling material between the outer area and the central area is blocked by the first layer material separating plates and the third layer material separating plates The common blocking function of the two-layer material separating plate respectively enters the front and rear second-layer sieve grids in the upper sieve grid).

The oil-repellent layer is arranged on the bottom plate of the screen frame (the oil-repellent layer can be obtained by sticking an oil-repellent sticker or spraying an oil-repellent coating, the surface smoothness of the oil-repellent layer can be improved, screened materials can rapidly flow into the channel, and the screened materials are prevented from being bonded, so that the screen is prevented from being stuck, and the yield is improved).

The working principle and the technical effect of the invention are as follows:

according to the invention, two sets of transmission devices which synchronously rotate are arranged externally, so that a large amount of internal space of the screen body is saved, and the screen grids, the screen frames and the screen paths in the screen body are optimized; the invention adopts the external transmission device, is convenient for installation, maintenance and repair, reduces the operation difficulty, improves the operation reliability and prolongs the service life of the transmission part; the invention adopts two sets of transmission devices which synchronously rotate, the centrifugal force superposition can increase the running torque, and the vertical component force in the running process of the screen body is balanced, so that the operation is stable, the use is safe, and the production efficiency is improved.

More specifically, the sieve path design is optimized, a middle multi-path feeding mode is adopted, materials are uniformly distributed to different sieve grids from two sides through the material homogenizing mechanism below the feeding hole so as to increase the yield, the thickness of the materials distributed on each layer is uniform through the multi-path structure, and the problem that equipment faults or the influence on the sieving efficiency are caused due to blockage or sieve withering caused by too much or too little materials on a certain layer can be effectively prevented. The sieve path can be flexibly designed according to the property of the screened materials and the process requirements, and can screen two to six different materials.

The sieve grids and the sieve frames are of pull-pull structures, so that the sieve grids and the sieve frames are convenient to mount, dismount and clean, the maintenance efficiency is improved, and the labor cost is saved. Through the inside slide with sieve check or reel complex of screen frame, very conveniently place or take out sieve check and reel pull. The inclination angle of the sieve grids is flexibly selected to be 0-20 degrees according to different requirements of sieving materials and yield.

The screen body is provided with the screen doors at two ends, the screen passage is formed by utilizing the space between the screen body and the screen doors, and the screen space can be seen by opening the screen doors, so that the inspection and the cleaning are convenient. The inside sieve check and the reel position that correspond of sieve door are provided with compact structure, close the sieve door and can compress tightly the sieve check and the reel on each layer respectively, and the door is U type slot coordination all around with the reel, and inside pastes has soft sealing material, realizes mechanical labyrinth and seals, prevents that the material from passing through the sieve door and scurring. The sieve door is connected with the sieve body through a hinge belt, so that the sieve door is convenient to open and close. The sieve door and the sieve body are fixed by a quick locking handle, and the operation is simple, convenient and easy to maintain.

The base plate of the screen frame is adhered with the oleophobic paster or sprayed with the oleophobic coating to increase the surface smoothness, and screened materials can rapidly flow into the channel to prevent the screened materials from being bonded, thereby preventing the screened materials from being stuck and improving the yield.

The rack of the invention is of a movable connection structure, is connected by the flange and the bolt, increases the stress area, can avoid the reduction of the strength of welding stress and is convenient for field installation.

The invention relates to a screening and grading device with high yield and easy maintenance. The external transmission mode in the invention can avoid occupying the internal space of the screen body, realize the optimized design of the screen cloth, increase the screening area and improve the productivity. The two sets of transmission devices synchronously operate to increase the torque, and the capacity is favorably improved. The flexible sieve path design and the changeable sieve grid inclination angle are beneficial to increasing the productivity. And a proper material homogenizing mechanism is beneficial to the even distribution of the materials so as to improve the productivity. The proper screen grid inclination angle is beneficial to improving the productivity. The specially treated bottom plate of the screen frame is beneficial to improving the yield. The pulse valve is adopted to clean the flour net at regular time, so that the screen is prevented from being burnt and the productivity is improved.

The two sets of transmission forms can balance the component force in the vertical direction when the equipment runs, the running is more stable and reliable, and the maintenance frequency is reduced. The external form of transmission makes the installation and removal convenient, easily installs and maintains. The sieve grids and the sieve frames are of pull structures, are easy to install, assemble and disassemble and are convenient to inspect and maintain. The screen frame both ends set up to the sieve door, and the sieve door is connected for the hinge belt with the screen frame, and is fixed with the sieve door through the handle that compresses tightly fast, and the inside closing device that is provided with in the sieve door can realize compressing tightly respectively sieve check and reel when closing the sieve door to fix the sieve door on the screen frame through the handle that compresses tightly fast, open the sieve door alright see the screen cloth space, be convenient for inspect the screen cloth and clear up the sifter, realize easy maintenance function. The frame is a movable connection structure, so that the field installation is convenient. The adoption of the pulse valve can realize the cleaning of the flour screen without stopping the machine and improve the operation simplicity.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a left side view of fig. 1.

Fig. 3 is a schematic structural view of the gantry.

Fig. 4 is a top view of fig. 3.

Fig. 5 is a schematic view of the structure of the screen body after the screen door is closed.

Fig. 6 is a right side view of fig. 5.

Fig. 7 is a schematic view of the structure of the screen body after the screen door is opened in the present invention.

Fig. 8 is a vertical sectional view in the middle of fig. 7.

Fig. 9 is a schematic structural view of the refining mechanism.

Fig. 10 is a schematic view of the structure of the punching plate.

Fig. 11 is a schematic structural view of a first embodiment of the synchronizing mechanism assembly (i.e., the synchronizing mechanism assembly used in the first embodiment).

Fig. 12 is a schematic structural view of a second embodiment of the synchronizing mechanism assembly (i.e., the synchronizing mechanism assembly employed in the second embodiment).

The sequence numbers in the figures illustrate: 1. the device comprises a rack, 1-1 parts of rack upright columns, 1-2 parts of rack cross beams, 1-3 parts of rack longitudinal beams, 1-4 parts of connecting flanges, 1-5 parts of upper hanging devices; 2. 2-1 of a screen body, 2-2 of a screen body frame, 2-2 of side plates, 2-3 of a lower hanging device; 3. a steel cord; 4. a screen frame; 5. a sieve lattice, 5', an upper sieve lattice, 5 ", a lower sieve lattice; 6. a feed inlet; 7. the material homogenizing mechanism comprises 7-1 parts of a ridge type punching plate, 7-2 parts of a first layer material distributing plate, 7-3 parts of a second layer material distributing plate, 7-4 parts of a third layer material distributing box plate; 8. a screen underflow discharge port; 9. a screen material outlet; 10. 10-1 of a screen door, 10-2 of a pressing device and 10-2 of a sealing strip; 11. the device comprises an external transmission device 11-1, a driven transmission assembly 11-2, a synchronous mechanism assembly 11-2-1, a synchronous belt 11-2-2, a synchronous belt wheel 11-2-3, a gear box 11-2-4, a universal shaft 11-3, a driving transmission assembly 11-3-1, a bearing seat 11-3-2, a transmission shaft 11-3-3, a deflection block 11-4, a belt transmission assembly 11-4-1, a belt wheel I, a belt wheel II, a belt wheel 4-3, a V-belt 11-5 and a power device; 12. a pulse valve.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

example one

As shown in fig. 1 to 11, the present invention provides a high-throughput and easy-maintenance screening and classifying apparatus, which is characterized in that: the screen comprises a frame (1), a screen body (2) which is hoisted on the frame through a steel cable (3), a plurality of layers of screen lattices (5) and a screen frame (4) (between the screen lattices (5) and the screen body (2)) which are arranged in an inner cavity of the screen body (2) in a pulling mode, and a pulling combination mode is adopted between the screen frame (4) and the screen body (2), so that the screen lattices (5) and the screen frame (4) can be conveniently and quickly disassembled, cleaned and maintained, a feed inlet (6) is arranged at the top of the screen body (2), a material homogenizing mechanism (7) (for receiving materials) is arranged right below the feed inlet (6), and the materials are guided to the layered screen lattices at two sides to play a role of uniform feeding, a screen underflow discharge outlet (8) is arranged at the center of the bottom of the screen body (2), and an screen overflow discharge outlet (9) (arranged at the bottom of the screen body (2) and adjacent to the screen underflow discharge outlet (8) (the materials) are respectively leftwards passed through the material homogenizing mechanism (7) after the materials enter the feed inlet (6), The materials are equally divided into multiple paths on the right side and enter the upper sieve grid (5') for sieving, and the multiple paths are in a structure favorable for improving the sieving efficiency and the yield of equipment. Each layer of screened material falls on the bottom plate of the screen frame (4), enters a channel of the screen body (2) and is collected at a screen underflow discharge port (8), the unscreened material enters an screen overflow discharge port (9) through an upper screen lattice (5 ') and a lower screen lattice (5'), is connected with the front end and the rear end of the screen body (2) through hinges and is rotatably opened and closed by two screen doors (10) (the screen lattices (5) and the screen frame (4) can be assembled and disassembled by opening the screen doors (10) and is cleaned and maintained, the screen lattices (5) and the screen frame (4) can be sealed and respectively compressed by closing the screen doors (10)), and the screen body (2) is pushed to carry out plane rotation circular motion by an external transmission device (11) (the external transmission device (11) can save a large amount of internal space of the screen body, so as to facilitate the optimal arrangement of the screen lattices, the discharge ports and the screen paths in the screen body; the maintenance is convenient, the maintenance period is prolonged, and the service life of the transmission part is prolonged; stable operation, safe use and high production efficiency), and pulse valves (12) fixedly arranged on the sieve doors at the two sides (after the pulse valves (12) are communicated with external high-pressure gas, the high-pressure gas can be periodically and automatically sprayed to the surfaces of the sieve grids, so that the sieve surface can be automatically cleaned without stopping the machine); the sieve grids (5) are divided into an upper sieve grid (5 ') and a lower sieve grid (5 "), the upper sieve grid (5') is of a multilayer slope structure which is symmetrically arranged at the front end and the rear end of the refining mechanism (7), the communication end of the upper sieve grid and the refining mechanism (7) is a high end, the lower sieve grid (5") is of a multilayer structure which is arranged in a zigzag manner, and the discharge end of the lowest layer in the lower sieve grid (5 ") is communicated with a discharge hole (9) for oversize products; the external transmission device (11) comprises a driving transmission assembly (11-3) and a driven transmission assembly (11-1) which are arranged on the left side and the right side of the screen body (2) and combined through a synchronous mechanism assembly (11-2), and a power device (11-5) which is connected with a belt transmission assembly (11-4) at the input end of the driving transmission assembly (11-3) and drives the belt transmission assembly (11-4).

The driving transmission assembly (11-3) and the driven transmission assembly (11-1) respectively comprise a bearing seat (11-3-1) with a built-in bearing, a transmission shaft (11-3-2) with two ends penetrating through the bearing seat (11-3-1), and a weight bias block (11-3-3) fixedly sleeved in the middle of the transmission shaft (the bearing seat (11-3-1) supports the transmission shaft (11-3-2) on one hand, and fixes the driving transmission assembly (11-3) and the driven transmission assembly (11-1) on the outer side of a screen body (2) on the other hand, and the transmission shaft (11-3-2) drives the weight bias block (11-3-3) to rotate together; the axes of the transmission shafts (11-3-2) in the driving transmission assembly (11-3) and the driven transmission assembly (11-1) are parallel and coplanar (torque can be effectively eliminated, and the stable operation of the whole machine is ensured); the eccentric weights (11-3-3) in the driving transmission assembly (11-3) and the driven transmission assembly (11-1) are of the same fan-shaped structure, the installation positions of the two eccentric weights (11-3-3) are the same, and the installation directions are the same (the centrifugal force generated by the rotation of the eccentric weights (11-3-3) on the two sides of the screen body (2) is ensured to be the same, and the stability of the screen body is ensured).

The synchronous mechanism component (11-2) is composed of a synchronous belt (11-2-1) and two synchronous belt wheels (11-2-2); one synchronous pulley (11-2-2) is arranged at the output end of a transmission shaft (11-3-2) in a driving transmission assembly (11-3), the other synchronous pulley (11-2-2) is arranged at the input end of the same side of the transmission shaft (11-3-2) in a driven transmission assembly (11-1), and the synchronous belt (11-2-1) is sleeved on the outer section of the two synchronous pulleys (11-2-2) (the two synchronous pulleys (11-2-2) are matched with the synchronous belt (11-2-1) to realize the homodromous and synchronous operation of the transmission shaft (11-3-2) in the driving transmission assembly (11-3) and the driven transmission assembly (11-1) and the deflection block (11-3-3), so as to provide centrifugal force to drive the screen body to do plane rotation circular motion.

The synchronous mechanism component (11-2) is composed of a universal shaft (11-2-4) and two gear boxes (11-2-3); one gear box (11-2-3) is arranged at the output end of a transmission shaft (11-3-2) in a driving transmission assembly (11-3), the other gear box (11-2-3) is arranged at the input end of the same side of the transmission shaft (11-3-2) in a driven transmission assembly (11-1), a universal shaft (11-2-4) is connected between the two gear boxes (11-2-3) (the two gear boxes (11-2-3) are matched with the universal shaft (11-2-4) to realize the homodromous and synchronous operation of the transmission shaft (11-3-2) in the driving transmission assembly (11-3) and the transmission shaft (11-3-2) in the driven transmission assembly (11-1) and a weight bias block (11-3-3), and centrifugal force is provided to drive a sieve body to do plane rotation circular motion.

The belt transmission assembly (11-4) comprises a belt wheel I (11-4-1) connected with the output end of a power device (11-5), a belt wheel II (11-4-2) connected with the input end of a driving transmission assembly (11-3) and a triangular belt (11-4-3) matched with each other (the power device (11-5) drives the belt wheel I (11-4-1) to rotate, the belt wheel I (11-4-1) drives the belt wheel II (11-4-2) to rotate through the triangular belt (11-4-3), and the belt wheel II (11-4-2) drives a transmission shaft (11-3-2) in the driving transmission assembly (11-3) to rotate.

The frame (1) is composed of four frame upright posts (1-1), two frame cross beams (1-2), two frame longitudinal beams (1-3) and eight pairs of connecting flanges (1-4); the frame beam (1-2) is fixed above the frame column (1-1) through four pairs of connecting flanges (1-4) (the connecting flanges (1-4) can increase the stress area and improve the understanding reliability, realize bolted connection and avoid welding stress), the frame longitudinal beam (1-3) is vertically overlapped and fixed on the frame beam (1-2) through four pairs of connecting flanges (1-4), an upper hanging device (1-5) (the upper hanging device (1-5) is installed on the outer side of the frame longitudinal beam (1-3) and used for fixing the upper end of the steel cable (3), and hanging is realized by matching with the steel cable (3)).

The screen body (2) is formed by taking a screen body frame (2-1) as a keel and sealing the outside by a side plate (2-2); and a lower hanging device (2-3) is arranged at the position which is arranged at the outer side of the screen body (2) and is vertically aligned with the upper hanging device (1-5) (the lower hanging device (2-3) is used for fixing the upper end of the steel cable (3) and is matched with the steel cable (3) to realize hanging).

According to the invention, a pressing device (10-1) for respectively pressing the screen frame (4) and the screen grids (5) is arranged on the inner surface of the screen door (10) (when the screen door (10) is closed, the pressing device (10-1) presses the screen frame (4) and the screen grids (5)), and sealing strips (10-2) are arranged on the periphery of the inner surface of the screen door (10) (so that dust overflow is avoided).

The material homogenizing mechanism (7) comprises a ridge type punching plate (7-1) horizontally arranged right below a feed inlet (6), two first layer material separating plates (7-2) which are vertically and symmetrically arranged on the lower surface of the ridge type punching plate (7-1) and extend downwards to the surface of a first layer of sieve lattice in an upper sieve lattice (5 '), two second layer material separating plates (7-3) which are vertically and symmetrically arranged on the lower surface of the ridge type punching plate (7-1) and extend downwards to the surface of a second layer of sieve lattice in the upper sieve lattice (5'), and a third layer material separating box plate (7-4) positioned in the center of the bottom of a flow separating cavity; the first layer material separating plate (7-2) and the second layer material separating plate (7-3) are vertically arranged in a parallel and spaced mode, the blanking area of the ridge type punching plate (7-1) is divided into five large areas, wherein the material falling along the middle blanking area is divided to the surfaces of two third layer sieve lattices in the upper sieve lattice (5 ') by a third layer material separating box plate (7-4) horizontally placed to receive the material and guide the material to the sieve lattices at two sides to play a role of uniform feeding, namely, when the material falls onto the ridge type punching plate (7-1) from the feeding port (6), the material uniformly falls from the punched hole, the falling material at the outermost side respectively enters the front and rear first layer sieve lattices in the upper sieve lattice (5') under the blocking effect of the left and right first layer material separating plates (7-2), and the falling material in the central area is blocked by the two second layer material separating plates (7-3), the materials enter the bottom of the distributing cavity and are distributed by a third layer of distributing box boards (7-4), and then respectively enter a front layer of sieve lattice and a rear layer of sieve lattice in the upper sieve lattice (5'); and the falling materials between the outer area and the central area enter the front and rear second layers of sieve grids in the upper sieve grid (5') respectively under the common blocking action of the first layer of material separating plate (7-2) and the second layer of material separating plate (7-3).

An oil-repellent layer is arranged on a bottom plate of the screen frame (4) (the oil-repellent layer can be obtained by sticking an oil-repellent sticker or spraying an oil-repellent coating, the oil-repellent layer can increase the surface smoothness, and screened materials can rapidly flow into a channel to prevent the screened materials from being bonded, so that the screening is prevented from being pasted and the yield is improved).

Example two

The second embodiment is different from the first embodiment only in that: the synchronous mechanism component (11-2) in the first embodiment is composed of a synchronous belt (11-2-1) and two synchronous pulleys (11-2-2) (see fig. 11). The synchronous mechanism assembly (11-2) in the second embodiment is composed of a universal shaft (11-2-4) and two gear boxes (11-2-3) (see fig. 12), wherein one gear box (11-2-3) is installed at the output end of the transmission shaft (11-3-2) in the driving transmission assembly (11-3), the other gear box (11-2-3) is installed at the same side input end of the transmission shaft (11-3-2) in the driven transmission assembly (11-1), the universal shaft (11-2-4) is connected between the two gear boxes (11-2-3) (the two gear boxes (11-2-3) are matched with the universal shaft (11-2-4) to realize that the transmission shafts (11-3-2) in the driving transmission assembly (11-3) and the driven transmission assembly (11-1) can be matched with the universal shaft (11-2-4) to realize that the transmission shafts (11-3-2) in the driving transmission assembly (11-3) and the driven transmission assembly (11-1) ) And the eccentric weights (11-3-3) rotate synchronously in the same direction to provide centrifugal force to drive the screen body to do plane rotation circular motion).

The specific use cases of the invention are as follows:

firstly, a screen body (2) is hung on a rack (1) through a steel cable (3) to ensure that the hanging is horizontal and reliable; when a power supply is switched on, the power device (11-5) drives the driving transmission assembly (11-3) and transmits power to the driven transmission assembly (11-1) through the synchronization mechanism assembly (11-2), and the two external transmission devices synchronously operate to provide centripetal force to drive the screen body (2) to do plane rotation circular motion. After the material feeding device is stable in operation, the material enters the screen body (2) from the feeding hole (6), the material is uniformly divided into front and rear screen grids in each layer in the upper screen grid (5 ') through the material homogenizing mechanism (7), the unsieved material is merged and enters the lower screen grid (5') along the inclined screen surface to continue screening and grading, the screened material in each layer falls onto the bottom plate of the screen frame (4) and is guided into the screen body channel to be collected at the screen underflow discharging hole (8) in the lower part of the screen body, and the screened material in the last layer enters the screen overflow discharging hole (9), so that the screening function is realized.

Claims (7)

1. The utility model provides a screening classification equipment that high productivity was easily maintained which characterized in that: the screen comprises a rack (1), a screen body (2) which is hung on the rack through a steel cable (3), a plurality of layers of screen grids (5) and screen frames (4) which are arranged in the inner cavity of the screen body (2) in a pulling mode, a feed inlet (6) arranged at the top of the screen body (2), a refining mechanism (7) which is positioned right below the feed inlet (6), a screen underflow discharge outlet (8) which is arranged at the center of the bottom of the screen body (2), a screen overflow discharge outlet (9) which is arranged at the bottom of the screen body (2) and is adjacent to the screen underflow discharge outlet (8), two screen doors (10) which are connected with the front end and the rear end of the screen body (2) through hinges and are opened and closed in a rotating mode, an external transmission device (11) which pushes the screen body (2) to perform plane rotation circular motion, and pulse valves (12) which are fixedly arranged on the screen doors at two sides; the sieve grids (5) are divided into an upper sieve grid (5 ') and a lower sieve grid (5 "), the upper sieve grid (5') is of a multilayer slope structure which is symmetrically arranged at the front end and the rear end of the refining mechanism (7), the communication end of the upper sieve grid and the refining mechanism (7) is a high end, the lower sieve grid (5") is of a multilayer structure which is arranged in a zigzag manner, and the discharge end of the lowest layer in the lower sieve grid (5 ") is communicated with a discharge hole (9) for oversize products; the external transmission device (11) comprises a driving transmission assembly (11-3) and a driven transmission assembly (11-1) which are arranged at the left and right outer sides of the screen body (2) and combined through a synchronous mechanism assembly (11-2), and a power device (11-5) which is connected with a belt transmission assembly (11-4) at the input end of the driving transmission assembly (11-3) and drives the belt transmission assembly (11-4); a pressing device (10-1) for respectively pressing the screen frame (4) and the screen grids (5) is arranged on the inner surface of the screen door (10), and sealing strips (10-2) are arranged on the periphery of the inner surface of the screen door (10); the material homogenizing mechanism (7) comprises a ridge type punching plate (7-1) horizontally arranged right below the feed inlet (6), two first layer material separating plates (7-2) which are vertically and symmetrically arranged on the lower surface of the ridge type punching plate (7-1) and extend downwards to the surface of a first layer of sieve lattice in an upper sieve lattice (5 '), two second layer material separating plates (7-3) which are vertically and symmetrically arranged on the lower surface of the ridge type punching plate (7-1) and extend downwards to the surface of a second layer of sieve lattice in the upper sieve lattice (5'), and a third layer material separating box plate (7-4) positioned at the center of the bottom of the material separating cavity; the first layer material separating plate (7-2) and the second layer material separating plate (7-3) are vertically arranged in a parallel and spaced mode, the blanking area of the ridge type punching plate (7-1) is divided into five large areas, wherein the materials falling along the middle blanking area are divided to the surfaces of two third layers of grids in the upper grids (5') by a third layer material separating box plate (7-4) which is horizontally arranged; and an oil drainage layer is arranged on the bottom plate of the screen frame (4).

2. A high throughput, easy to maintain screening classification apparatus as claimed in claim 1, wherein: the driving transmission assembly (11-3) and the driven transmission assembly (11-1) respectively comprise a bearing seat (11-3-1) with a built-in bearing, a transmission shaft (11-3-2) with two ends penetrating through the bearing seat (11-3-1), and a weight bias block (11-3-3) fixedly sleeved in the middle of the transmission shaft; wherein the axes of the transmission shafts (11-3-2) in the driving transmission assembly (11-3) and the driven transmission assembly (11-1) are parallel to each other and are coplanar; the offset weights (11-3-3) in the driving transmission assembly (11-3) and the driven transmission assembly (11-1) are of the same fan-shaped structure, and the installation positions of the two offset weights (11-3-3) are the same and the installation directions are the same.

3. A high throughput, easy to maintain screening classification apparatus as claimed in claim 1, wherein: the synchronous mechanism component (11-2) is composed of a synchronous belt (11-2-1) and two synchronous belt wheels (11-2-2); one synchronous pulley (11-2-2) is arranged at the output end of a transmission shaft (11-3-2) in a driving transmission component (11-3), the other synchronous pulley (11-2-2) is arranged at the input end of the transmission shaft (11-3-2) in a driven transmission component (11-1) at the same side, and a synchronous belt (11-2-1) is sleeved on the outer tangent plane of the two synchronous pulleys (11-2-2).

4. A high throughput, easy to maintain screening and grading apparatus according to claim 1, wherein: the synchronous mechanism component (11-2) is composed of a cardan shaft (11-2-4) and two gear boxes (11-2-3); one gear box (11-2-3) is arranged at the output end of a transmission shaft (11-3-2) in the driving transmission assembly (11-3), the other gear box (11-2-3) is arranged at the input end of the transmission shaft (11-3-2) in the driven transmission assembly (11-1) on the same side, and the universal shaft (11-2-4) is connected between the two gear boxes (11-2-3).

5. A high throughput, easy to maintain screening classification apparatus as claimed in claim 1, wherein: the belt transmission assembly (11-4) comprises a belt wheel I (11-4-1) connected with the output end of the power device (11-5), a belt wheel II (11-4-2) connected with the input end of the driving transmission assembly (11-3) and a triangular belt (11-4-3) matched with the belt wheel I.

6. A high throughput, easy to maintain screening classification apparatus as claimed in claim 1, wherein: the frame (1) is composed of four frame upright posts (1-1), two frame cross beams (1-2), two frame longitudinal beams (1-3) and eight pairs of connecting flanges (1-4); the frame cross beam (1-2) is fixed above the frame upright post (1-1) through four pairs of connecting flanges (1-4), the frame longitudinal beam (1-3) is vertically lapped and fixed on the frame cross beam (1-2) through four pairs of connecting flanges (1-4), and an upper hanging device (1-5) is installed on the outer side of the frame longitudinal beam (1-3).

7. A high throughput, easy to maintain screening classification apparatus as claimed in claim 1, wherein: the screen body (2) is formed by taking a screen body frame (2-1) as a keel and sealing the outside by a side plate (2-2); and a lower hanging device (2-3) is arranged at the outer side of the screen body (2) and is vertically aligned with the upper hanging device (1-5).

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