CN114682484A

CN114682484A - Multistage cleaning device

Info

Publication number: CN114682484A
Application number: CN202210324215.3A
Authority: CN
Inventors: 王佩琦; 赵瑞营; 陈艺; 夏朝勇; 张峻岭; 李坤由
Original assignee: Cofco Research & Engineering Zhengzhou Co ltd
Current assignee: Cofco Research & Engineering Zhengzhou Co ltd
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2022-07-01
Anticipated expiration: 2042-03-30
Also published as: CN114682484B

Abstract

The invention belongs to the technical field of grain cleaning equipment, and particularly relates to a multistage cleaning device which comprises a primary cleaning mechanism and a vibration cleaning mechanism, wherein a belt wheel and a conveying belt form a closed-loop track with the same inclination as a cleaning screen when in use, a support frame is arranged in a clamping sleeve, a driving motor is started to drive the belt wheel and the conveying belt to rotate anticlockwise so as to drive the support frame to move along the closed-loop track, two ends of the support frame are clamped in the clamping sleeve through the clamping spring, the support frame can be kept in a vertical state all the time, a sleeve rod can push a hairbrush to be tightly connected with the cleaning screen all the time in the first half stroke of the closed-loop track by using the elasticity of a tension spring, the mesh holes of a screen can be quickly cleared, excessive impurities are prevented from being accumulated, the use of the equipment is prevented from being influenced, the support frame in the second half stroke runs to the upper part of the conveying belt, a certain distance is kept between the hairbrush and the cleaning screen, and the impurities are prevented from being brought back, the workload of people for frequently cleaning the screen is reduced, and the equipment cleaning efficiency is improved.

Description

Multistage cleaning device

Technical Field

The invention belongs to the technical field of grain cleaning equipment, and particularly relates to a multistage cleaning device.

Background

During the processes of harvesting, transporting, airing and the like of the grains, the grains contain impurities such as dust, silt, stones, metal slag, roots, stems, leaves and shells of plants, and the impurities are stored or processed together with the grains, so that the phenomenon of dewing and mildew occurs, the quality of the grains is seriously affected, and therefore, the grains need to be cleaned and then transported, processed or stored.

At present, the technical level of cleaning equipment in China is continuously improved, and domestic grain machine manufacturers continuously improve grain cleaning equipment, so that the grain cleaning technology is urgently needed to be integrated and optimized, and the requirement of cleaning grains in China after harvesting is met. The clearance and the screening effect of grain and the damping effect of shale shaker need promote urgently, and based on this, it is necessary to study a multistage cleaning device.

Disclosure of Invention

Aiming at the defects and problems of the existing equipment, the invention provides a multistage cleaning device, which effectively solves the problems that the cleaning and screening effects of grains and the vibration reduction effect of a vibrating screen need to be improved urgently.

The technical scheme adopted by the invention for solving the technical problems is as follows: a multi-stage cleaning device comprises a primary screen cleaning mechanism and a vibration cleaning mechanism, wherein the primary screen cleaning mechanism comprises a screen box, an anti-blocking assembly and a supporting assembly, a feed inlet is formed in the screen box, a supporting rod is fixed at the lower end of the inner wall of the feed inlet, a refining frame which is thin at the upper part and thick at the lower part is fixed on the supporting rod, the upper end of the refining frame is hemispherical, the lower end of the refining frame is in an inclined frustum shape, three layers of cleaning screens with the apertures from large to small are sequentially arranged in the screen box from top to bottom, the upper two layers are inclined from left to right, and the lowest layer is horizontally arranged; an anti-blocking component is arranged above each layer of cleaning screen, the anti-blocking component comprises two groups of belt wheels, a conveying belt, a support frame and a hairbrush, the two groups of belt wheels are respectively arranged on the front inner wall and the rear inner wall of the screen box through bearings, the middle part of each bearing is provided with a rotating shaft in a transmission sleeved mode, one end of one rotating shaft is connected with a driving motor, the conveying belt is arranged on each group of belt wheels, a closed-loop track with the same inclination as the cleaning screen is formed, the outer wall of the conveying belt is provided with a clamping sleeve, the two ends of the support frame are arranged in the clamping sleeve through clamping springs and can move along with the closed-loop track and always keep a vertical state, round holes are uniformly formed in the lower surface of the support frame, tension springs are fixed in the round holes, sleeve rods matched with the round holes are fixed at the movable ends of the tension springs, the hairbrush is fixed at the lower ends of the sleeve rods and is always closely connected with the cleaning screen in the first half stroke of the closed-loop track, the right side of each layer of cleaning screen is provided with a matched discharge hole; the vibration cleaning mechanism comprises a vibrating screen and a vibrating frame, the vibrating screen is fixed on the vibrating frame, a first vibrating motor is installed on the vibrating screen, and a vibrating screen of the vibrating screen is of a double-layer net structure.

Further, the supporting component comprises supporting columns, supporting sleeves and damping springs, the supporting columns are uniformly distributed at four corners of the lower surface of the screen box, the supporting columns are sleeved in the supporting sleeves, the damping springs are installed in the supporting sleeves, and the upper ends of the damping springs are connected with the supporting columns.

Furthermore, the vibrating screen comprises an upper screen, a screen support, an embossing net and embossing net battens, the screen support is fixed in the middle of the vibrating frame, the upper screen is fixed in the screen support, the embossing net is uniformly arranged below the upper screen, and the embossing net battens are arranged on the embossing net in a transverse and longitudinal crossed manner.

Furthermore, the middle part of sieve case lower surface is provided with first feed opening, and the left side of shale shaker lower part is provided with the second feed opening, and the below of two feed openings is provided with and connects the grain conveyer.

Furthermore, the universal wheel is installed to the vibration frame lower part, and the lower surface of shale shaker lower part is provided with little miscellaneous export, and the below of little miscellaneous export is provided with little miscellaneous conveyer.

Furthermore, a second vibrating motor is fixed on the left side of the screen box.

Furthermore, a support plate is fixed on one side of the loop bar, air nozzles are uniformly fixed on the lower surface of the support plate, an air inlet pipe is arranged on each air nozzle, and the air inlet pipe is connected with an air pump through a hose.

Furthermore, the other side of loop bar is installed the gyro wheel, evenly is provided with ground thorn on the outer wall of gyro wheel.

The invention has the beneficial effects that: the grain refining device is mainly used for cleaning grains, the screen box, the material homogenizing frame and the cleaning screen are arranged in a matched mode, the material homogenizing frame is installed at the feed inlet through the supporting rod when the grain refining device is used, when grains enter from the feed inlet, the upper end of the material homogenizing frame is hemispherical, the lower end of the material homogenizing frame is in an inclined frustum shape, the grains can uniformly enter the screen box like a slide way, the grain refining device is prevented from being accumulated at one position and affecting the cleaning efficiency, the three layers of cleaning screen are arranged to enable the grain cleaning effect of the device to be better, the upper two layers have certain inclination, the grains can have certain flowing capacity, flowing screening is conducted for multiple times, and the cleaning efficiency of the device is improved.

Through the matching arrangement of the two groups of belt wheels, the conveying belt, the support frame and the hairbrush, when in use, the anti-blocking component is arranged above each layer of cleaning screen cloth, the cleaning screen cloth can be prevented from being blocked all the time, the belt wheels and the conveying belt form a closed loop track with the same inclination as the cleaning screen cloth, the support frame is arranged in the clamping sleeve, the driving motor is started to drive the belt wheels and the conveying belt to rotate anticlockwise, so as to drive the support frame to move along the closed loop track, the two ends of the support frame are clamped in the clamping sleeve through the clamping spring, the support frame can be always kept in a vertical state, the loop bar can push the hairbrush to be always tightly connected with the cleaning screen cloth in the first half stroke of the closed loop track by utilizing the elasticity of the tension spring, the mesh holes can be rapidly cleared, the accumulation of excessive impurities is avoided, the use of equipment is influenced, the support frame in the second half stroke moves to the upper part of the conveying belt, and a certain distance is kept between the hairbrush and the cleaning screen cloth, avoid bringing back impurity, alleviateed people and need often to the work burden of screen cloth clearance, improved equipment cleaning efficiency.

Through setting on shale shaker and the vibration frame, discharge the grain impurity that sieves out through the sieve case during use on the shale shaker from the discharge gate, start first vibrating motor and drive the shale shaker and carry out screening once more to grain impurity, the shale shaker of shale shaker is double-deck network structure, further improves the screening effect, makes grain obtain good clearance, is favorable to improving grain quality.

Through support column, support sleeve and damping spring's cooperation setting, the support column suit is in support sleeve during the use, and application damping spring's elasticity for the sieve case provides support and absorbing effect, can prevent effectively that the sieve case from acutely vibrating, prevents that the mechanical parts of sieve incasement portion from taking place not hard up.

Through the matching arrangement of the upper screen, the screen support, the embossing net and the embossing net pressing strips, the upper screen and the lower embossing net are fixed together through the bolts and the screen support, so that grains can be well cleaned, and the grain quality is favorably improved.

Through the arrangement of the air nozzle, the air pump is controlled to generate aerodynamic force during use, the air nozzle blows air to the cleaning screen through the hose, impurities or grains clamped in the mesh holes can be blown off, the blockage in the mesh holes is avoided, and convenience is brought to grain screening; through the setting of gyro wheel, the gyro wheel rolls along cleaning the screen cloth along the removal of loop bar, and the ground thorn that evenly sets up on its outer wall can be cleared up stifled cleaning the screen cloth mesh.

Therefore, the grain screening machine is novel in structure, when the grain screening machine is used, grains uniformly enter the screen box from the feeding hole through the material homogenizing frame, are sequentially screened through the three layers of screening screens, clean grains flow to the first discharging hole to be discharged and fall onto the grain receiving conveyor, impurities and part of mixed grains are discharged from the discharging hole and fall onto the screen of the vibrating screen in a parabola shape, the vibrating screen is provided with two layers of screens, the screened grains are discharged from the second discharging hole and fall onto the grain receiving conveyor, small impurities are finally discharged from the small impurity outlet and fall onto the small impurity conveyor, some large impurities and coarse impurities are removed through the primary cleaning screen, and when the processed grains pass through the vibrating screen, some large impurities and coarse impurities cannot be stuck on the screen, so that the screen does not need to be cleaned, and the working efficiency of the vibrating screen can be improved;

the grain cleaning machine is characterized in that a material homogenizing frame is arranged at the feed inlet through a support rod, when grains enter from the feed inlet, the upper end of the material homogenizing frame is hemispherical, the lower end of the material homogenizing frame is in an inclined frustum shape, the grains can uniformly enter a screen box like a slide way, accumulation at one position is avoided, the screen cleaning efficiency is influenced, three layers of cleaning screen meshes are arranged to enable the grain cleaning effect of the equipment to be better, the upper two layers have certain inclination, the grains can have certain flowing capacity, flowing screening can be carried out for many times, and the equipment cleaning efficiency is improved; through the matching arrangement of the two groups of belt wheels, the conveying belt, the support frame and the hairbrush, when in use, the anti-blocking component is arranged above each layer of cleaning screen cloth, the cleaning screen cloth can be prevented from being blocked all the time, the belt wheels and the conveying belt form a closed loop track with the same inclination as the cleaning screen cloth, the support frame is arranged in the clamping sleeve, the driving motor is started to drive the belt wheels and the conveying belt to rotate anticlockwise, so as to drive the support frame to move along the closed loop track, the two ends of the support frame are clamped in the clamping sleeve through the clamping spring, the support frame can be always kept in a vertical state, the loop bar can push the hairbrush to be always tightly connected with the cleaning screen cloth in the first half stroke of the closed loop track by utilizing the elasticity of the tension spring, the mesh holes can be rapidly cleared, the accumulation of excessive impurities is avoided, the use of equipment is influenced, the support frame in the second half stroke moves to the upper part of the conveying belt, and a certain distance is kept between the hairbrush and the cleaning screen cloth, the impurities are prevented from being brought back, the workload of people for frequently cleaning the screen is reduced, and the equipment cleaning efficiency is improved; through setting on shale shaker and the vibration frame, discharge the grain impurity that sieves out through the sieve case during use on the shale shaker from the discharge gate, start first vibrating motor and drive the shale shaker and carry out screening once more to grain impurity, the shale shaker of shale shaker is double-deck network structure, further improves the screening effect, makes grain obtain good clearance, is favorable to improving grain quality.

Drawings

FIG. 1 is a schematic cross-sectional view of a sieve box according to the present invention;

FIG. 2 is a schematic structural view of a shaker of the present invention;

FIG. 3 is a left side view of the structure of FIG. 2;

FIG. 4 is a schematic illustration of the construction of a shaker screen of the present invention;

FIG. 5 is a schematic structural view of the anti-clogging element of the present invention;

fig. 6 is a schematic front view of the anti-blocking assembly according to the present invention.

The reference numbers in the figures are: 1 is the sieve case, 2 is the feed inlet, 3 is branch, 4 is the refining frame, 5 is the screen cloth of cleaning, 6 is the band pulley, 7 is conveyor belt, 8 is the support frame, 9 is the brush, 10 is the pivot, 11 is the cutting ferrule, 12 is the round hole, 13 is the extension spring, 14 is the loop bar, 15 is the discharge gate, 16 is the shale shaker, 17 is the shaking frame, 18 is first vibrating motor, 19 is the support column, 20 is the support sleeve, 21 is damping spring, 22 is first feed opening, 23 is the second feed opening, 24 is the universal wheel, 25 is little miscellaneous export, 26 is the second vibrating motor, 27 is the extension board, 28 is the air nozzle, 29 is the gyro wheel, 30 is ground thorn.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

Example 1: this embodiment aims at providing a multistage cleaning device, and mainly used carries out the work of clearing up to grain to solve the problem that the clearance of present grain and the damping effect of screening effect and shale shaker need urgently promote, based on this, this embodiment mainly is to cleaning device, has set up elementary cleaning mechanism and vibration cleaning mechanism.

In the specific structure, as shown in fig. 1-6, a multistage cleaning device comprises a primary cleaning mechanism and a vibration cleaning mechanism, wherein the primary cleaning mechanism comprises a screen box 1, an anti-blocking component and a supporting component, a feed inlet 2 is formed in the screen box 1, a support rod 3 is fixed at the lower end of the inner wall of the feed inlet 2, a refining frame 4 with a fine upper part and a coarse lower part is fixed on the support rod 3, the upper end of the refining frame 4 is hemispherical, the lower end of the refining frame is in an inclined frustum shape, three cleaning screens 5 with the pore diameters from large to small are sequentially arranged in the screen box 1 from top to bottom, the upper two layers are all obliquely arranged from left to right, and the lowest layer is horizontally arranged; through sieve case 1, refining frame 4 sets up with the cooperation of cleaning screen cloth 5, in 2 departments of feed inlet through branch 3 installation refining frame 4 during the use, when grain enters from the feed inlet, refining frame 4 upper end is the hemisphere, the lower extreme is the slope frustum form, similar slide can make the even entering sieve incasement 1 of grain, avoid piling up in a position, influence cleaning efficiency, it makes equipment better to grain cleaning effect to set up the three-layer screen cloth 5 of cleaning, it has certain inclination to go up the two-layer, can make grain have certain flow ability, carry out the screening that flows many times, improve equipment cleaning efficiency.

An anti-blocking component is arranged above each layer of cleaning screen 5 and comprises two groups of belt wheels 6, a conveying belt 7, a support frame 8 and a brush 9, the two groups of belt wheels 6 are respectively arranged on the front inner wall and the rear inner wall of the screen box 1 through bearings, the middle part of each bearing is provided with a rotating shaft 10 in a transmission sleeved mode, one end of one rotating shaft 10 is connected with a driving motor, the conveying belt 7 is arranged on each group of belt wheels 6 and forms a closed-loop track with the same inclination as the cleaning screen 5, the outer wall of the conveying belt 7 is provided with a clamping sleeve 11, two ends of the support frame 8 are arranged in the clamping sleeve 11 through clamping springs and move along with the closed-loop track and can be kept in a vertical state all the time, round holes 12 are uniformly formed in the lower surface of the support frame 8, tension springs 13 are fixed in the round holes 12, sleeve rods 14 matched with the round holes 12 are fixed at the movable ends of the tension springs 13, and the brush 9 is fixed at the lower ends of the sleeve rods 14, and is closely connected with the cleaning screen 5 all the time in the first half stroke of the closed loop track, and the right side of each layer of cleaning screen 5 is provided with a matched discharge hole 15; through the matching arrangement of the two groups of belt wheels 6, the conveying belt 7, the support frame 8 and the hairbrush 9, when in use, the anti-blocking component is arranged above each layer of cleaning screen 5, the cleaning screen 5 can be prevented from being blocked all the time, the belt wheels 6 and the conveying belt 7 form a closed loop track with the same inclination as the cleaning screen 5, the support frame 8 is arranged in the clamping sleeve 11, the driving motor is started to drive the belt wheels 6 and the conveying belt 7 to rotate anticlockwise, so as to drive the support frame 8 to move along the closed loop track, the two ends of the support frame 8 are clamped in the clamping sleeve 11 through the clamping spring, the support frame 8 can be kept in a vertical state all the time, the loop bar 14 can push the hairbrush 9 to be closely connected with the cleaning screen 5 all the time in the first half stroke of the closed loop track by utilizing the elasticity of the tension spring 13, the screen holes can be rapidly cleared, excessive impurities are prevented from being accumulated, the use of the equipment is influenced, the support frame 8 in the second half stroke moves to the upper part of the conveying belt 7, the brush 9 keeps a certain distance with the cleaning screen 5, so that impurities are prevented from being brought back, the workload of people for cleaning the screen frequently is reduced, and the equipment cleaning efficiency is improved.

The vibration cleaning mechanism comprises a vibration screen 16 and a vibration frame 17, the vibration screen 16 is fixed on the vibration frame 17, a first vibration motor 18 is installed on the vibration screen 16, and a vibration screen of the vibration screen 16 is of a double-layer net structure; through the setting on shale shaker 16 and the vibration frame 17, discharge the grain impurity that sieves out through sieve case 1 during the use on shale shaker 16 from discharge gate 15, start first vibrating motor 18 and drive shale shaker 16 and sieve grain impurity once more, the shale shaker of shale shaker 16 is double-deck network structure, further improves the screening effect, makes grain obtain good clearance, is favorable to improving grain quality.

In the embodiment, the sieve box 1, the material homogenizing frame 4 and the cleaning screen 5 are matched, the material homogenizing frame 4 is installed at the feed inlet 2 through the support rod 3 when the sieve box is used, when grains enter from the feed inlet, the upper end of the material homogenizing frame 4 is hemispherical, the lower end of the material homogenizing frame is in an inclined frustum shape, the grains can uniformly enter the sieve box 1 like a slide way, the influence of accumulation at one position on the cleaning efficiency is avoided, the three layers of cleaning screen 5 are arranged, the equipment has a better cleaning effect on the grains, the upper two layers have certain inclination, the grains can have certain flowing capacity, the flowing screening is carried out for many times, and the cleaning efficiency of the equipment is improved; through the matching arrangement of the two groups of belt wheels 6, the conveying belt 7, the support frame 8 and the hairbrush 9, when in use, the anti-blocking component is arranged above each layer of cleaning screen 5, the cleaning screen 5 can be prevented from being blocked all the time, the belt wheels 6 and the conveying belt 7 form a closed loop track with the same inclination as the cleaning screen 5, the support frame 8 is arranged in the clamping sleeve 11, the driving motor is started to drive the belt wheels 6 and the conveying belt 7 to rotate anticlockwise, so as to drive the support frame 8 to move along the closed loop track, the two ends of the support frame 8 are clamped in the clamping sleeve 11 through the clamping spring, the support frame 8 can be kept in a vertical state all the time, the loop bar 14 can push the hairbrush 9 to be closely connected with the cleaning screen 5 all the time in the first half stroke of the closed loop track by utilizing the elasticity of the tension spring 13, the screen holes can be rapidly cleared, excessive impurities are prevented from being accumulated, the use of the equipment is influenced, the support frame 8 in the second half stroke moves to the upper part of the conveying belt 7, a certain distance is kept between the brush 9 and the cleaning screen 5, so that impurities are prevented from being brought back, the workload of people for frequently cleaning the screen is reduced, and the equipment cleaning efficiency is improved; through the setting on shale shaker 16 and the vibration frame 17, discharge the grain impurity that sieves out through sieve case 1 during the use on shale shaker 16 from discharge gate 15, start first vibrating motor 18 and drive shale shaker 16 and sieve grain impurity once more, the shale shaker of shale shaker 16 is double-deck network structure, further improves the screening effect, makes grain obtain good clearance, is favorable to improving grain quality.

Example 2: this example is substantially the same as example 1, except that: the present embodiment further describes the specific structure of the supporting component.

In a specific structure, as shown in fig. 1, the support assembly comprises support columns 19, support sleeves 20 and damping springs 21, the support columns 19 are uniformly distributed at four corners of the lower surface of the screen box 1, the support columns 19 are sleeved in the support sleeves 20, the damping springs 21 are installed in the support sleeves 20, and the upper ends of the damping springs are connected with the support columns 19; through support column 19, supporting sleeve 20 and damping spring 21's cooperation setting, support column 19 suit during the use is in supporting sleeve 20, and application damping spring 21's elasticity for sieve case 1 provides support and absorbing effect, can prevent effectively that sieve case 1 from violent vibration, prevents that the mechanical parts of sieve case 1 inside from taking place not hard up.

Example 3: this example is substantially the same as example 1, except that: this example further illustrates the specific structure of the vibrating screen.

In a specific structure, as shown in fig. 4, the vibrating screen comprises an upper screen, a screen support, an embossing net and embossing net battens, wherein the screen support is fixed in the middle of the vibrating frame, the upper screen is fixed in the screen support, the embossing net is uniformly arranged below the upper screen, and the embossing net battens are transversely and longitudinally arranged on the embossing net in a crossed manner; through the matching arrangement of the upper screen, the screen support, the embossing net and the embossing net pressing strips, the upper screen and the lower embossing net are fixed together through the bolts and the screen support, so that grains can be well cleaned, and the grain quality is favorably improved.

Example 4: this example is substantially the same as example 1, except that: the present embodiment further describes the specific structure of the sieve box 1.

In a specific structure, as shown in fig. 1-3, a first feed opening 22 is arranged in the middle of the lower surface of the screen box 1, a second feed opening 23 is arranged on the left side of the lower part of the vibrating screen 16, and a grain receiving conveyor is arranged below the two feed openings; through the setting of first feed opening 22 and second feed opening 23, be provided with in the below of two feed openings and connect the grain conveyer, can be convenient for transport the net grain of sieving out, labour saving and time saving.

The lower part of the vibrating frame 17 is provided with a universal wheel 24, the lower surface of the lower part of the vibrating screen 16 is provided with a small impurity outlet 25, and a small impurity conveyor is arranged below the small impurity outlet 25; through the setting of universal wheel 24, can be convenient for people to remove vibration clearance mechanism, improve equipment removal flexibility sets up little miscellaneous export 25 and little miscellaneous conveyer, facilitates for clearing up little miscellaneous.

A second vibration motor 26 is fixed on the left side of the screen box 1; through the setting of second vibrating motor 26, can make sieve case 1 have certain vibration ability, improve the screening efficiency of cleaning screen cloth 5.

Example 5: this example is substantially the same as example 1, except that: the embodiment further describes the specific structure of the loop bar 14.

In a specific structure, as shown in fig. 5-6, a support plate 27 is fixed on one side of the loop bar 14, air nozzles 28 are uniformly fixed on the lower surface of the support plate 27, and air inlet pipes are arranged on the air nozzles 28 and connected with an air pump through hoses; through the setting of air nozzle 28, control air pump production aerodynamic force during the use makes air nozzle 28 blow to cleaning screen cloth 5 through the hose, can blow off the impurity or the grain of the downthehole joint of mesh, avoids blockking up in the mesh, facilitates for grain screening.

The other side of the loop bar 14 is provided with a roller 29, and the outer wall of the roller 29 is uniformly provided with ground thorns 30; through the arrangement of the roller 29, the roller 29 rolls along the cleaning screen 5 along with the movement of the loop bar 14, and the ground thorns 30 uniformly arranged on the outer wall of the roller can clear the blockage of the meshes of the cleaning screen 5.

Claims

1. The utility model provides a multistage cleaning device, includes elementary sieve cleaning mechanism and vibration clearance mechanism, its characterized in that: the primary screen cleaning mechanism comprises a screen box, an anti-blocking assembly and a supporting assembly, a feed inlet is formed in the screen box, a supporting rod is fixed at the lower end of the inner wall of the feed inlet, a refining frame which is fine at the top and thick at the bottom is fixed on the supporting rod, the upper end of the refining frame is hemispherical, the lower end of the refining frame is in an inclined frustum shape, three cleaning screen meshes with the apertures from large to small are sequentially arranged in the screen box from top to bottom, the upper two layers are all obliquely arranged from top to bottom, and the lowest layer is horizontally arranged; an anti-blocking component is arranged above each layer of cleaning screen, the anti-blocking component comprises two groups of belt wheels, a conveying belt, a support frame and a hairbrush, the two groups of belt wheels are respectively arranged on the front inner wall and the rear inner wall of the screen box through bearings, the middle part of each bearing is provided with a rotating shaft in a transmission sleeved mode, one end of one rotating shaft is connected with a driving motor, the conveying belt is arranged on each group of belt wheels, a closed-loop track with the same inclination as the cleaning screen is formed, the outer wall of the conveying belt is provided with a clamping sleeve, the two ends of the support frame are arranged in the clamping sleeve through clamping springs and can move along with the closed-loop track and always keep a vertical state, round holes are uniformly formed in the lower surface of the support frame, tension springs are fixed in the round holes, sleeve rods matched with the round holes are fixed at the movable ends of the tension springs, the hairbrush is fixed at the lower ends of the sleeve rods and is always closely connected with the cleaning screen in the first half stroke of the closed-loop track, the right side of each layer of cleaning screen is provided with a matched discharge hole; the vibration cleaning mechanism comprises a vibrating screen and a vibrating frame, the vibrating screen is fixed on the vibrating frame, a first vibrating motor is installed on the vibrating screen, and a vibrating screen of the vibrating screen is of a double-layer net structure.

2. A multi-stage cleaning apparatus according to claim 1, wherein: the supporting component comprises supporting columns, supporting sleeves and damping springs, the supporting columns are uniformly distributed at four corners of the lower surface of the screen box, the supporting columns are sleeved in the supporting sleeves, the damping springs are installed in the supporting sleeves, and the upper ends of the damping springs are connected with the supporting columns.

3. A multi-stage cleaning apparatus according to claim 1, wherein: the vibrating screen comprises an upper screen, a screen support, an embossing net and embossing net battens, wherein the screen support is fixed in the middle of the vibrating frame, the upper screen is fixed in the screen support, the embossing net is uniformly arranged below the upper screen, and the embossing net battens are transversely and longitudinally arranged on the embossing net in a crossed manner.

4. A multi-stage cleaning apparatus according to claim 1, wherein: the middle part of sieve case lower surface is provided with first feed opening, and the left side of shale shaker lower part is provided with the second feed opening, and the below of two feed openings is provided with and connects the grain conveyer.

5. A multi-stage cleaning apparatus according to claim 1, wherein: the universal wheel is installed to the vibration frame lower part, and the lower surface of shale shaker lower part is provided with little miscellaneous export, and the below of little miscellaneous export is provided with little miscellaneous conveyer.

6. A multi-stage cleaning apparatus according to claim 1, wherein: and a second vibrating motor is fixed on the left side of the screen box.

7. A multi-stage cleaning apparatus according to claim 1, wherein: a support plate is fixed on one side of the loop bar, air nozzles are uniformly fixed on the lower surface of the support plate, an air inlet pipe is arranged on each air nozzle, and the air inlet pipe is connected with an air pump through a hose.

8. A multi-stage cleaning apparatus according to claim 1, wherein: the other side of the loop bar is provided with a roller, and the outer wall of the roller is uniformly provided with ground thorns.