阅读说明：本技术 一种用于打米机出米的多级分筛装置及方法 (Multi-stage screening device and method for rice output of rice mill ) 是由 李国梁 于 2021-08-31 设计创作，主要内容包括：本发明公开了一种用于打米机出米的多级分筛装置及方法,包括筛选箱和连接在筛选箱顶部的进料机构,所述筛选箱内部设有分筛机构,所述筛选箱底部连接有若干组支腿；所述进料机构包括与筛选箱内腔连通的进料管,所述进料管两侧设有通风口,两组所述通风口相靠近一侧安装有滤网；本发明根据现有需求进行设计,物料在进入进料管内后,引风件工作能使两组通风口之间形成风道,物料内夹杂的灰尘被引出排尘管内,物料进入筛选箱内时溅起的灰尘进入分支管内,排尘管内气流流动,会带动分支管内的灰尘进入排尘管内,有效的去除物料中的粉尘,清扫件能对滤网进行清理,防止滤网堵塞,分筛机构能对物料进行多级筛选,且出料均匀。(The invention discloses a multi-stage screening device and a multi-stage screening method for rice discharged by a rice mill, wherein the multi-stage screening device comprises a screening box and a feeding mechanism connected to the top of the screening box, a screening mechanism is arranged in the screening box, and the bottom of the screening box is connected with a plurality of groups of supporting legs; the feeding mechanism comprises a feeding pipe communicated with the inner cavity of the screening box, ventilation openings are formed in two sides of the feeding pipe, and filter screens are arranged on one sides, close to the two groups of ventilation openings, of the two groups of ventilation openings; the invention is designed according to the existing requirement, after materials enter the feeding pipe, the air inducing piece works to form an air channel between the two groups of ventilation openings, dust mixed in the materials is led out of the dust exhaust pipe, dust splashed when the materials enter the screening box enters the branch pipe, airflow in the dust exhaust pipe flows to drive the dust in the branch pipe to enter the dust exhaust pipe, the dust in the materials is effectively removed, the cleaning piece can clean the filter screen to prevent the filter screen from being blocked, the screening mechanism can perform multi-stage screening on the materials, and the materials are uniformly discharged.)

1. A multi-stage screening device for rice output of a rice mill comprises a screening box (11) and a feeding mechanism connected to the top of the screening box (11), wherein a screening mechanism (13) is arranged inside the screening box (11), and the bottom of the screening box (11) is connected with a plurality of groups of supporting legs (12);

the method is characterized in that: the feeding mechanism comprises a feeding pipe (17) communicated with the inner cavity of the screening box (11), ventilation openings (21) are formed in two sides of the feeding pipe (17), and a filter screen is arranged on one side, close to the two groups of ventilation openings (21), of each group of ventilation openings;

the air inducing piece is arranged on the feeding pipe (17) and used for forming an air channel between the two groups of ventilation openings (21) to discharge dust in the feeding pipe (17), and the two groups of cleaning pieces which can automatically swing under the impact of materials are arranged in the feeding pipe (17) and used for cleaning the filter screen;

the screening mechanism (13) comprises a first-stage screening plate (26) and a second-stage screening plate (29), and a driving piece is arranged in the screening box (11) and used for driving the first-stage screening plate (26) and the second-stage screening plate (29) to vibrate;

screening case (11) one side is equipped with out the material for carry out the output to the material after the screening.

2. The multi-stage screening device for discharging rice of a rice mill according to claim 1, wherein: the induced air piece includes fan (22) and dust exhaust pipe (19), install in one of them a set of vent (21) outside fan (22), dust exhaust pipe (19) are installed in another set of vent (21) outside, fan (22) air-out end corresponds with vent (21), dust exhaust pipe (19) air inlet end corresponds with vent (21).

3. The multi-stage screening device for discharging rice of the rice husking machine according to claim 2, wherein: inlet pipe (17) top is connected with feeder hopper (18), one side intercommunication that feeder hopper (18) were kept away from in dust exhaust pipe (19) has bleeder (20), dust exhaust pipe (19) one end and screening case (11) inner chamber intercommunication are kept away from in bleeder (20).

4. The multi-stage screening device for discharging rice of a rice mill according to claim 1, wherein: clean the piece and include center seat (24) and connect group on center seat (24) and be group board (23) that dialling that the annular array set up, inlet pipe (17) one side is connected with fan-shaped cover (25) that extends, fan-shaped cover (25) that extends is equipped with the rotation seat of being connected with center seat (24) rotation with inlet pipe (17) linking department, it is connected with the brush cleaner to dial one side that board (23) is close to the filter screen.

5. The multi-stage screening device for discharging rice of a rice mill according to claim 1, wherein: the bottom of each of the first-stage sieve plate (26) and the second-stage sieve plate (29) is provided with a fixing plate (28), one end of the bottom of each of the first-stage sieve plate (26) and the second-stage sieve plate (29) is rotatably connected with the fixing plate (28), the other end of the bottom of each of the first-stage sieve plate (26) and the second-stage sieve plate (29) is connected with the fixing plate (28) through a buffer spring (30), and the fixing plate (28) is installed on the inner wall of the screening box (11); one-level sieve (26) and second grade sieve (29) are close to buffer spring (30) one end top and all install oblique baffle (27), one-level sieve (26) are close to oblique baffle (27) one end and connect first extension board (31), second grade sieve (29) are close to oblique baffle (27) one end and connect second extension board (37).

6. The multi-stage screening device for discharging rice of the rice husking machine according to claim 5, wherein: the driving piece comprises an eccentric disc (35), a transmission rod (36) is connected to the eccentric disc (35) at a position deviating from the center of a circle, a motor box is arranged on the outer wall of the screening box (11), and a driving motor (38) for driving the transmission rod (36) to rotate is arranged in the motor box;

eccentric disc (35) bottom and second extension board (37) contact, eccentric disc (35) top contact stripper plate (34), stripper plate (34) top fixed connection supports compression leg (32), support compression leg (32) and pass deflector (33) of connection at screening case (11) inner wall and contact first extension board (31), deflector (33) bottom is equipped with the spring of cup jointing on supporting compression leg (32).

7. The multi-stage screening device for discharging rice of a rice mill according to claim 1, wherein: go out the material piece and include that one-level goes out hopper (16) and second grade play hopper (15), screening case (11) one side is equipped with one-level export and the second grade export that is used for one-level play hopper (16) and second grade to go out hopper (15) to pass respectively, one-level goes out hopper (16) and second grade to go out hopper (15) articulated with the bottom of one-level export and second grade export respectively, one-level goes out hopper (16) and stretches into one end contact one-level sieve (26) bottom of screening case (11) inner chamber, second grade goes out hopper (15) and stretches into one end contact second grade sieve (29) bottom of screening case (11) inner chamber.

8. The multi-stage screening device for discharging rice of a rice mill according to claim 7, wherein: screening case (11) outer wall connection has first traction member (39) and second that the slope set up to pull (40), first traction member (39) set up in one-level play hopper (16) bottom, and first traction member (39) keep away from screening case (11) one end and connect one-level play hopper (16) bottom, second traction member (40) set up in second grade play hopper (15) bottom, and second traction member (40) keep away from screening case (11) one end and connect second grade play hopper (15) bottom, first traction member (39) and second traction member (40) all include the pull rod and connect the extension spring of keeping away from screening case (11) one end at the pull rod.

9. The multi-stage screening device for discharging rice of a rice mill according to claim 7, wherein: go out the material still including setting up collection box (14) in second grade sieve (29) bottom, screening case (11) one side articulates there is transparent cover, collect box (14) and be close to transparent cover one side and connect the handle.

10. The use method of the multi-stage sieving device for rice discharging of the rice mill of any one of claims 1-9 is characterized by comprising the following steps:

firstly, materials output from a rice milling machine can be input to a feed hopper (18) through a hoisting machine, and the materials enter a feeding pipe (17) from the feed hopper (18) and then enter a screening box (11);

when the materials pass through the screening box (11), external air is introduced into the feeding pipe (17) by the fan (22) and is discharged from the dust exhaust pipe (19), so that dust mixed with falling materials in the feeding pipe (17) is led out into the dust exhaust pipe (19), when the air in the dust exhaust pipe (19) flows, the dust entering the branch pipe (20) of the screening box (11) is simultaneously led out, the materials impact the shifting plate (23) when falling, the central seat (24) is driven to rotate around the rotating seat, the shifting plate (23) continuously swings around the rotating seat, and the cleaning brush cleans a filter screen;

thirdly, the materials enter the screening box (11) from the feeding pipe (17) and then fall on the first-stage screen plate (26), the driving motor (38) works to drive the eccentric disc (35) to swing, the eccentric disc (35) impacts the extrusion plate (34) and the second extension plate (37) in a reciprocating mode, the extrusion plate (34) drives the pressure resisting column (32) to impact the first extension plate (31) in a reciprocating mode, the first-stage screen plate (26) and the second-stage screen plate (29) swing around the rotary connection part of the fixing plate (28) and extrude the buffer spring (30) after being impacted, and the materials are screened in a reciprocating mode;

step four, partial material on the one-level sieve plate (26) gets into second grade sieve plate (29) through the sieve mesh, partial material on the second grade sieve plate (29) gets into in collecting box (14) through the sieve mesh, the material of screening gets into one-level play hopper (16) and exports on one-level sieve plate (26), the material of screening gets into second grade play hopper (15) and exports on second grade sieve plate (29), when one-level sieve plate (26) and second grade sieve plate (29) vibrate, can drive one-level play hopper (16) and second grade play hopper (15) and vibrate, the output of auxiliary material.

Technical Field

The invention relates to the technical field of rice production, in particular to a multi-stage screening device and method for rice output of a rice mill.

Background

And (3) conveying the dried and cleaned millet to a ridge millet machine for husking, separating the brown rice in the material, and then beating the brown rice into polished rice by a rice mill, wherein the material output by the rice mill contains broken rice, impurities and dust and needs to be screened.

Current patent publication is CN107537778B a rice screening conveyor, through the setting of a plurality of conveyer troughs, under the effect of vibrations, makes the material of different density carry to the conveyer trough of difference in, just accomplishes the screening of rice in the transportation process of rice.

However, when the screening and conveying device is used, the screening and conveying device is conveyed by the top and the bottom of the screening and conveying device to be layered and input into different grooves, the screening precision is low, dust is easy to mix in materials and is not easy to remove, and improvement is needed. Aiming at the problems, a multi-stage screening device and a multi-stage screening method for discharging rice of a rice mill are provided.

Disclosure of Invention

The invention aims to provide a multi-stage screening device and a multi-stage screening method for rice output of a rice mill, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a multi-stage screening device for rice output of a rice mill comprises a screening box and a feeding mechanism connected to the top of the screening box, wherein a screening mechanism is arranged inside the screening box, and the bottom of the screening box is connected with a plurality of groups of supporting legs;

the feeding mechanism comprises a feeding pipe communicated with the inner cavity of the screening box, ventilation openings are formed in two sides of the feeding pipe, and filter screens are arranged on one sides, close to the two groups of ventilation openings, of the two groups of ventilation openings;

the air inducing piece is arranged on the feeding pipe and used for forming an air channel between the two groups of ventilation openings to discharge dust in the feeding pipe, and the two groups of cleaning pieces which can automatically swing under the impact of materials are arranged in the feeding pipe and used for cleaning the filter screen;

the screening mechanism comprises a first-stage screening plate and a second-stage screening plate, and a driving piece is arranged in the screening box and used for driving the first-stage screening plate and the second-stage screening plate to vibrate;

screening case one side is equipped with out the material for carry out the output to the material after the screening.

Preferably, the induced air piece includes fan and dust exhaust pipe, the fan is installed in one of them group vent outside, the dust exhaust pipe is installed in another group vent outside, fan air-out end corresponds with the vent, dust exhaust pipe air inlet end corresponds with the vent.

Preferably, the inlet pipe top is connected with the feeder hopper, the dust exhaust pipe is kept away from one side intercommunication of feeder hopper has the bleeder, the bleeder is kept away from dust exhaust pipe one end and is filtered case inner chamber intercommunication.

Preferably, clean the piece and include that center seat and the three groups of connection on center seat are the group board that the annular array set up, inlet pipe one side is connected with the fan-shaped cover that extends, fan-shaped cover that extends is equipped with the rotation seat that the center seat rotated to be connected with inlet pipe linking department, it is connected with the brush cleaner to dial one side that the board is close to the filter screen.

Preferably, the bottom parts of the first-stage sieve plate and the second-stage sieve plate are respectively provided with a fixed plate, one ends of the bottom parts of the first-stage sieve plate and the second-stage sieve plate are respectively rotatably connected with the fixed plates, the other ends of the bottom parts of the first-stage sieve plate and the second-stage sieve plate are respectively connected with the fixed plates through buffer springs, and the fixed plates are arranged on the inner wall of the screening box; the one-level sieve and second grade sieve are close to buffer spring one end top and all install oblique baffle, the one-level sieve is close to oblique baffle one end and connects first extension board, the second grade sieve is close to oblique baffle one end and connects the second extension board.

Preferably, the driving part comprises an eccentric disc, a transmission rod is connected to the eccentric disc at a position deviating from the center of a circle, a motor box is arranged on the outer wall of the screening box, and a driving motor for driving the transmission rod to rotate is arranged in the motor box; the bottom of the eccentric disc is in contact with the second extension plate, the top of the eccentric disc is in contact with the extrusion plate, the top of the extrusion plate is fixedly connected with the pressing column, the pressing column penetrates through the guide plate connected to the inner wall of the screening box to be in contact with the first extension plate, and the bottom of the guide plate is provided with a spring sleeved on the pressing column.

Preferably, go out the material piece and include that one-level goes out the hopper and the second grade goes out the hopper, screening case one side is equipped with one-level export and the second grade export that is used for one-level play hopper and second grade to go out the hopper to pass respectively, one-level goes out hopper and second grade play hopper and is articulated with the bottom of one-level export and second grade export respectively, one-level goes out the hopper and stretches into the one end contact one-level sieve bottom of screening incasement chamber, the second grade goes out the hopper and stretches into the one end contact second grade sieve bottom of screening incasement chamber.

Preferably, the outer wall of the screening box is connected with a first traction part and a second traction part which are obliquely arranged, the first traction part is arranged at the bottom of the first-level discharge hopper, one end of the screening box is far away from the first traction part to be connected with the bottom of the first-level discharge hopper, the second traction part is arranged at the bottom of the second-level discharge hopper, one end of the screening box is far away from the second traction part to be connected with the bottom of the second-level discharge hopper, and the first traction part and the second traction part both comprise a pull rod and a tension spring connected to the pull rod and far away from one end of the screening box.

Preferably, the discharge part further comprises a collection box arranged at the bottom of the second-stage sieve plate, one side of the screening box is hinged with a transparent cover plate, and the collection box is close to one side of the transparent cover plate and is connected with a handle.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the feeding mechanism is arranged, after the materials enter the feeding pipe, the air inducing piece works to form an air channel between the two groups of ventilation openings, dust mixed in the materials is led out of the dust exhaust pipe, the dust splashed when the materials enter the screening box enters the branch pipe, airflow in the dust exhaust pipe flows to drive the dust in the branch pipe to enter the dust exhaust pipe, and the dust in the materials is effectively removed;

according to the invention, the cleaning piece is arranged, so that materials can impact the shifting plate to swing when descending, and the shifting plate can clean the filter screen, so that the filter screen is prevented from being blocked and is convenient to use for a long time;

the driving piece drives the first-stage sieve plate and the second-stage sieve plate to vibrate and simultaneously drives the first-stage discharge hopper and the second-stage discharge hopper to vibrate, so that smooth output of materials is facilitated.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic view of the inside of the feed tube in the present invention.

FIG. 3 is a schematic view of the cleaning element of the present invention.

Fig. 4 is a schematic structural view of the screening mechanism of the present invention.

FIG. 5 is a schematic view showing the inside structure of the screening chamber of the present invention.

In the figure: 11. a screening box; 12. a support leg; 13. a screening mechanism; 14. a collection box; 15. a secondary discharging hopper; 16. a first-stage discharge hopper; 17. a feed pipe; 18. a feed hopper; 19. a dust exhaust pipe; 20. a branch pipe; 21. a vent; 22. a fan; 23. dialing a plate; 24. a center seat; 25. a fan-shaped extension cover; 26. a first-stage sieve plate; 27. an inclined baffle plate; 28. a fixing plate; 29. a second-stage sieve plate; 30. a buffer spring; 31. a first extension plate; 32. a pressing column; 33. a guide plate; 34. a pressing plate; 35. an eccentric disc; 36. a transmission rod; 37. a second extension plate; 38. a drive motor; 39. a first traction member; 40. a second traction member.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, in the embodiment of the invention, a multi-stage screening device for rice output of a rice mill comprises a screening box 11 and a feeding mechanism connected to the top of the screening box 11, wherein a screening mechanism 13 is arranged inside the screening box 11, and the bottom of the screening box 11 is connected with a plurality of groups of supporting legs 12; the material output from the rice mill can enter the feeding mechanism through the hoister and then is input into the screening box 11;

the feeding mechanism comprises a feeding pipe 17 communicated with the inner cavity of the screening box 11, ventilation openings 21 are formed in two sides of the feeding pipe 17, and a filter screen is arranged on one side, close to the two groups of ventilation openings 21;

the air inducing piece is arranged on the feeding pipe 17 and used for forming an air channel between the two groups of ventilation openings 21 to discharge dust in the feeding pipe 17, and the two groups of cleaning pieces which can automatically swing under the impact of materials are arranged in the feeding pipe 17 and used for cleaning the filter screen;

the screening mechanism 13 comprises a first-stage screening plate 26 and a second-stage screening plate 29, and a driving piece is arranged in the screening box 11 and used for driving the first-stage screening plate 26 and the second-stage screening plate 29 to vibrate;

screening case 11 one side is equipped with out the material for carry out the output to the material after the screening.

The air inducing piece comprises a fan 22 and a dust exhaust pipe 19, the fan 22 is installed outside one group of ventilation openings 21, the dust exhaust pipe 19 is installed outside the other group of ventilation openings 21, the air outlet end of the fan 22 corresponds to the ventilation openings 21, and the air inlet end of the dust exhaust pipe 19 corresponds to the ventilation openings 21; after the materials enter the feeding pipe 17, the air inducing piece works to form an air channel between the two groups of ventilation openings 21, dust mixed in the materials is led out of the dust exhaust pipe 19, and when the cyclone dust collector is actually used, one end, far away from the feeding pipe 17, of the dust exhaust pipe 19 can be connected with a cyclone separator to collect the dust exhausted by the dust exhaust pipe 19;

the inlet pipe 17 top is connected with feeder hopper 18, one side intercommunication that feeder hopper 18 was kept away from to dust exhaust pipe 19 has bleeder 20, 19 one end of dust exhaust pipe and the inner chamber intercommunication of screening case 11 are kept away from to bleeder 20, and the dust that splashes when the material got into in the screening case 11 gets into bleeder 20 in, and the interior air current of dust exhaust pipe 19 flows, can drive the dust in bleeder 20 and get into in the dust exhaust pipe 19, the effectual dust of getting rid of in the material.

The cleaning piece comprises a central seat 24 and three groups of shifting plates 23 connected to the central seat 24 and arranged in an annular array, a fan-shaped extension cover 25 is connected to one side of the feeding pipe 17, a rotating seat rotatably connected with the central seat 24 is arranged at the joint of the fan-shaped extension cover 25 and the feeding pipe 17, and a cleaning brush is connected to one side, close to the filter screen, of the shifting plate 23; when falling, the material impacts the shifting plate 23 and drives the central seat 24 to rotate around the rotating seat, so that the shifting plate 23 continuously swings around the rotating seat, and the cleaning brush cleans the filter screen.

The bottom parts of the first-stage sieve plate 26 and the second-stage sieve plate 29 are respectively provided with a fixing plate 28, one end of the bottom parts of the first-stage sieve plate 26 and the second-stage sieve plate 29 are respectively connected with the fixing plate 28 in a rotating mode, the other end of the bottom parts of the first-stage sieve plate 26 and the second-stage sieve plate 29 are respectively connected with the fixing plate 28 through a buffer spring 30, and the fixing plates 28 are installed on the inner wall of the screening box 11; inclined baffles 27 are arranged at the tops of the ends, close to the buffer springs 30, of the first-stage sieve plate 26 and the second-stage sieve plate 29, one ends, close to the inclined baffles 27, of the first-stage sieve plate 26 are connected with first extension plates 31, and one ends, close to the inclined baffles 27, of the second-stage sieve plate 29 are connected with second extension plates 37; partial material on the one-level sieve 26 gets into second grade sieve 29 through the sieve mesh, oblique baffle 27 can reduce the scattering of material, when driving piece drive one-level sieve 26 and the vibration of second grade sieve 29, one-level sieve 26 and second grade sieve 29 are around rotating junction swing and extrusion buffer spring 30 with fixed plate 28, so reciprocal screening the material, the sieve is the sieve among the prior art, the sieve mesh on two sets of sieves sets up the size differently, can set up according to the demand during the in-service use.

The driving part comprises an eccentric disc 35, a transmission rod 36 is connected to the eccentric disc 35 at a position deviating from the center of a circle, a motor box is arranged on the outer wall of the screening box 11, and a driving motor 38 for driving the transmission rod 36 to rotate is arranged in the motor box; the bottom of the eccentric disc 35 is in contact with the second extension plate 37, the top of the eccentric disc 35 is in contact with the extrusion plate 34, the top of the extrusion plate 34 is fixedly connected with the pressure resisting column 32, the pressure resisting column 32 passes through the guide plate 33 connected to the inner wall of the screening box 11 to be in contact with the first extension plate 31, and the bottom of the guide plate 33 is provided with a spring sleeved on the pressure resisting column 32;

when the driving piece works, the driving motor 38 works to drive the eccentric disc 35 to swing, the eccentric disc 35 impacts the extrusion plate 34 and the second extension plate 37 in a reciprocating mode, the extrusion plate 34 drives the pressing column 32 to impact the first extension plate 31 in a reciprocating mode, and the first-stage sieve plate 26 and the second-stage sieve plate 29 are impacted to generate vibration to screen materials.

The discharging part comprises a primary discharging hopper 16 and a secondary discharging hopper 15, a primary outlet and a secondary outlet which are respectively penetrated by the primary discharging hopper 16 and the secondary discharging hopper 15 are arranged on one side of the screening box 11, the primary discharging hopper 16 and the secondary discharging hopper 15 are respectively hinged with the bottoms of the primary outlet and the secondary outlet, one end of the primary discharging hopper 16 extending into the inner cavity of the screening box 11 is contacted with the bottom of the primary sieve plate 26, and one end of the secondary discharging hopper 15 extending into the inner cavity of the screening box 11 is contacted with the bottom of the secondary sieve plate 29; the materials output by the first-stage sieve plate 26 and the second-stage sieve plate 29 respectively enter the first-stage discharge hopper 16 and the second-stage discharge hopper 15.

The outer wall of the screening box 11 is connected with a first traction piece 39 and a second traction piece 40 which are obliquely arranged, the first traction piece 39 is arranged at the bottom of the primary discharging hopper 16, one end, far away from the screening box 11, of the first traction piece 39 is connected with the bottom of the primary discharging hopper 16, the second traction piece 40 is arranged at the bottom of the secondary discharging hopper 15, one end, far away from the screening box 11, of the second traction piece 40 is connected with the bottom of the secondary discharging hopper 15, and the first traction piece 39 and the second traction piece 40 both comprise pull rods and tension springs connected to one ends, far away from the screening box 11, of the pull rods;

the setting of drawing the piece can prevent that one-level play hopper 16 and second grade play hopper 15 from tipping over in to screening case 11, and the setting of extension spring makes the piece of drawing have certain elasticity simultaneously, and the swing around articulated department of one-level play hopper 16 and second grade play hopper 15 of being convenient for makes one-level play hopper 16 and second grade play hopper 15 receive the effect of one-level sieve 26 and second grade sieve 29 and takes place the vibration.

The discharging part also comprises a collecting box 14 arranged at the bottom of the second-stage sieve plate 29, and the fine crushed material impurities can enter the collecting box 14 through sieve holes on the first-stage sieve plate 26 and the second-stage sieve plate 29; a transparent cover plate is hinged to one side of the screening box 11, and a handle is connected to one side, close to the transparent cover plate, of the collecting box 14; the setting of transparent cover plate is convenient for observe and is divided 13 working processes of sieve mechanism, also can set up other apron as required during in-service use, and the setting of handle is convenient for take out collection box 14.

The working principle of the invention is as follows: the material output from the rice mill can be input into a feed hopper 18 through a hoist, and the material enters a feed pipe 17 from the feed hopper 18 and then enters a screening box 11;

when materials pass through the screening box 11, external air is introduced into the feeding pipe 17 by the fan 22 and is discharged from the dust exhaust pipe 19, so that dust mixed in falling materials in the feeding pipe 17 is led out into the dust exhaust pipe 19, when the air in the dust exhaust pipe 19 flows, the dust entering the branch pipe 20 of the screening box 11 is simultaneously led out, the materials impact the poking plate 23 when falling, the central seat 24 is driven to rotate around the rotating seat, the poking plate 23 is driven to continuously swing around the rotating seat, and the cleaning brush cleans a filter screen;

the material enters the screening box 11 from the feeding pipe 17 and then falls on the first-stage screen plate 26, the driving motor 38 works to drive the eccentric disc 35 to swing, the eccentric disc 35 reciprocally impacts the extrusion plate 34 and the second extension plate 37, the extrusion plate 34 drives the pressing column 32 to reciprocally impact the first extension plate 31, the first-stage screen plate 26 and the second-stage screen plate 29 oscillate around the rotary joint with the fixed plate 28 and extrude the buffer spring 30 after being impacted, and the material is screened in such a reciprocating way;

partial material on the one-level sieve 26 gets into second grade sieve 29 through the sieve mesh, partial material on the second grade sieve 29 gets into through the sieve mesh and collects in the box 14, the material that filters on the one-level sieve 26 gets into one-level play hopper 16 and exports, the material that filters on the second grade sieve 29 gets into second grade play hopper 15 and exports, when one-level sieve 26 and the vibration of second grade sieve 29, can drive one-level play hopper 16 and second grade play hopper 15 and vibrate, the output of auxiliary material.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof.