CN111097695A

CN111097695A - Air screen type corn seed cleaning and sorting machine with double screen box functions

Info

Publication number: CN111097695A
Application number: CN201811260402.XA
Authority: CN
Inventors: 薛治军; 曹立国; 张文敬
Original assignee: Gansu Jiuyu Seed Industry Co ltd
Current assignee: Gansu Jiuyu Seed Industry Co ltd
Priority date: 2018-10-26
Filing date: 2018-10-26
Publication date: 2020-05-05

Abstract

The invention discloses an air-screen corn seed cleaning and sorting machine with double-screen box function, which comprises a base and a second belt, wherein a fixed frame is arranged at the top of the base, a feeding pipe is arranged on the left side of the fixed frame, a first motor is arranged below the feeding pipe and is rotationally connected with a first motor shaft, the first motor shaft is rotationally connected with a spiral transmission set, the spiral transmission set is rotationally connected with an auger, the auger is arranged in the feeding pipe, the left side of the left bottom of the feeding pipe is connected with a feeding port, the top of the feeding pipe is connected with a discharging pipe, and a grid is arranged in the discharging pipe. This air screen formula maize seed cleaner with two sieve case functions is provided with grid, first filter screen, second filter screen, third filter screen, first fan, movable support and second fan, cleans through screening in advance, air screen formula is cleaned and the vibrating is cleaned and is carried out thorough cleaning to maize seed, improves the screening in the time of keeping cleaning efficiency and selects the right amount, and it is more convenient to use.

Description

Air screen type corn seed cleaning and sorting machine with double screen box functions

Technical Field

The invention relates to the technical field of corn seed processing, in particular to an air screen type corn seed cleaning and sorting machine with a double-screen box function.

Background

In the production and processing of corn seeds, fine sand stones, stems and leaves and the like doped in the corn seeds are often required to be removed, and due to the fact that the fine sand stones, the stems and leaves and the corn seeds have different specific gravities, the air screen type corn seed cleaning machine is required to be used.

Present maize seed cleaning mill simple structure usually clears away the tiny grit of doping in the maize seed through the screen cloth, and the great impurity of surface area such as stem leaf can't pass the filter screen, and the inside screen cloth of traditional maize seed cleaning mill is small in quantity, cleans the time weak point at cleaning process, consequently influences filtration quality, and it is convenient inadequately to use, need improve current equipment to above-mentioned problem.

Disclosure of Invention

The invention aims to provide an air screen type corn seed cleaning machine with a double-screen box function, and aims to solve the problems that the existing corn seed cleaning machine in the market, which is provided by the background technology, is simple in structure, small sand stones doped in corn seeds are usually cleaned through a screen, impurities with large surface areas such as stems and leaves cannot pass through the screen, the number of screens in the traditional corn seed cleaning machine is small, and the cleaning time is short in the cleaning process, so that the filtering quality is influenced.

In order to achieve the purpose, the invention provides the following technical scheme: an air-screening corn seed cleaner with double-screen box function comprises a base and a second belt, wherein the top of the base is provided with a fixed frame, the left side of the fixed frame is provided with a feeding pipe, a first motor is arranged below the feeding pipe, the first motor is rotationally connected with a first motor shaft, the first motor shaft is rotationally connected with a spiral transmission set, the spiral transmission set is rotationally connected with an auger, the auger is arranged in the feeding pipe, the left side of the left bottom of the feeding pipe is connected with a feeding port, the top of the feeding pipe is connected with a discharging pipe, a grid is arranged in the discharging pipe, the left side of the bottom of the discharging pipe is provided with an air inlet, the right side of the bottom of the discharging pipe is connected with a light impurity feeding pipe, the bottom of the right end of the light impurity feeding pipe is connected with a first light impurity discharging pipe, the bottom of the first light impurity discharging pipe is connected with the, the right side of the light impurity feeding pipe is provided with a first fan, the bottom of the discharging pipe is connected with a first sieve box, a first sieve screen is arranged in the first sieve box, the right side of the bottom of the first sieve box is connected with a second light impurity discharging pipe, the second light impurity discharging pipe is connected with the left side of the top of the first impurity storage box, the left side of the bottom of the first sieve box is provided with a first discharging port, the bottom of the first discharging port is connected with the left side of the top of the second sieve box, the second sieve box is internally provided with a second sieve screen, the left side of the second sieve screen is connected with the inner wall of the left side of the second sieve box through a spring, the right side of the second sieve screen is rotatably connected with a movable support, the lower end of the left side of the movable support is rotatably connected with a third sieve screen, the left side of the third sieve screen is rotatably connected with a connecting, the utility model discloses a fan, including movable support, first roller, second sieve bottom of the case portion, second fan, first roller, eccentric wheel, pivot, second roller, second sieve bottom of the case portion left side is provided with the second discharge gate, and second discharge gate bottom is connected with the storage case, and second sieve bottom of the case portion right side is connected with the second storage miscellaneous case simultaneously, be provided with the second filter screen in the second storage miscellaneous case, and the second filter screen is connected with the second fan, first roller rotates and is connected with first belt, and just first belt right side rotates and is connected with the eccentric wheel, the eccentric wheel internal rotation is connected with the pivot, rotate in the pivot and be connected with the second roller, the second motor rotates and is connected with the second motor shaft, and the second motor shaft rotates and is connected with the third roller, second belt left end rotates and is connected with the third.

Preferably, the interior of the grid is of a gap structure, and the gap distance is larger than the diameter of the RMB one-yuan coin.

Preferably, the central point of the first filter screen and the central point of the light impurity feeding pipe are on the same horizontal straight line.

Preferably, first screen cloth is provided with 2, and 2 first screen cloths all are the slope form setting, and the first screen cloth left side of upside is connected with first sieve case left side inner wall, and the first screen cloth right side of downside is connected with first sieve case right side inner wall simultaneously.

Preferably, the surfaces of the first screen, the second screen and the third screen are all in mesh structures, the clearance of the mesh structures on the surface of the first screen is smaller than that of the mesh structures on the surface of the second screen, and the clearance of the mesh structures on the surface of the second screen is smaller than that of the mesh structures on the surface of the third screen.

Preferably, the top of the second sieve box is in a mesh structure.

Preferably, the second screen, the third screen and the movable support are connected in a rotating manner.

Preferably, the second screen and the third screen form a telescopic mechanism together with the spring, and the telescopic distance of the telescopic mechanism is smaller than the initial length of the spring.

Preferably, the top of the baffle is at a level higher than the level of the right side of the bottom of the second screen.

Compared with the prior art, the invention has the beneficial effects that: this air screen formula maize seed cleaning and sorting machine with two sieve case functions is provided with.

(1) The corn seed cleaning device is provided with a grating, an air inlet, a light impurity feeding pipe, a first light impurity discharging pipe, a first impurity storage box, a first filter screen and a first fan, wherein the grating is arranged above the air inlet, corn seeds can become loose after passing through the grating, impurities with large areas, light mass and the like, such as stems and leaves doped in the corn seeds, are separated from the corn seeds, the first fan drives air to enter from the air inlet and drives the impurities with light mass, such as the stems and the leaves, to enter the light impurity feeding pipe, and finally, the impurities are blocked by the first filter screen and fall into the first impurity storage box through the first light impurity discharging pipe for storage, the corn seeds are pre-screened before being cleaned, and the subsequent corn seed cleaning efficiency is;

(2) the corn seed screening device is provided with a first screen, a second screen and a third screen, wherein the diameters of surface meshes of the first screen, the second screen box and the third screen are increased progressively, corn seeds are screened for three times, impurities doped in the corn seeds are screened to the greatest extent, and the screening quality is improved;

(3) the corn seed screening machine is provided with a first screen box, a second screen box, a first screen, a second screen, a third screen, a spring, a movable support, a connecting rod and an eccentric wheel, wherein 2 first screens are arranged, the 2 first screens are fixedly arranged, the second screen and the third screen are connected with the movable support and the spring, and the second screen and the third screen are driven to shake through the rotation of the eccentric wheel so as to improve the screening efficiency of corn seeds;

(4) be provided with second storage box and second fan, the second fan drives the air and enters into the second sieve incasement and passes the second screen cloth and the mesh structure on third screen cloth surface from the mesh structure at second sieve roof portion and drive impurity and pass second screen cloth and third screen cloth faster, further improves and cleans efficiency.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic top view of the second screen of FIG. 1 according to the present invention;

FIG. 3 is a schematic front view of the grating of FIG. 1 according to the present invention;

FIG. 4 is a schematic top view of the grating of FIG. 1 according to the present invention;

FIG. 5 is a schematic top view of the first belt of FIG. 1 in accordance with the present invention;

FIG. 6 is a front view of the movable support of FIG. 1 according to the present invention;

FIG. 7 is an enlarged view of the structure at A in FIG. 1 according to the present invention.

In the figure: 1. a base, 2, a fixed frame, 3, a feeding pipe, 4, a first motor, 5, a first motor shaft, 6, a spiral transmission set, 7, a packing auger, 8, a feeding port, 9, a discharging pipe, 10, a grid, 11, an air inlet, 12, a light impurity feeding pipe, 13, a first light impurity discharging pipe, 14, a first impurity storage box, 15, a first filter screen, 16, a first fan, 17, a first sieve box, 18, a first sieve screen, 19, a second light impurity discharging pipe, 20, a first discharging port, 21, a second sieve box, 22, a second sieve screen, 23, a spring, 24, a movable support, 25, a third sieve screen, 26, a connecting rod, 27, a baffle plate, 28, a first roller, 29, a second discharging port, 30, a material storage box, 31, a second impurity storage box, 32, a second filter screen, 33, a second fan, 34, a first belt, 35, an eccentric wheel, 36, a rotating shaft, 37, a second roller, 38 and a second motor, 39. a second motor shaft 40, a third roller 41 and a second belt.

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. 1-7, the present invention provides a technical solution: an air-screening corn seed cleaning and sorting machine with double-screen box function comprises a base 1, a fixed frame 2, a feeding pipe 3, a first motor 4, a first motor shaft 5, a spiral transmission set 6, a packing auger 7, a feeding hole 8, a discharging pipe 9, a grid 10, an air inlet 11, a light impurity feeding pipe 12, a first light impurity discharging pipe 13, a first impurity storage box 14, a first filter screen 15, a first fan 16, a first screen box 17, a first screen 18, a second light impurity discharging pipe 19, a first discharging hole 20, a second screen box 21, a second screen 22, a spring 23, a movable support 24, a third screen 25, a connecting rod 26, a baffle 27, a first roller 28, a second discharging hole 29, a material storage box 30, a second impurity storage box 31, a second filter screen 32, a second fan 33, a first belt 34, an eccentric wheel 35, a rotating shaft 36, a second roller 37, a second motor 38, a second motor shaft 39, a third roller 40 and a second belt 41, the top of the base 1 is provided with a fixed frame 2, the left side of the fixed frame 2 is provided with a feeding pipe 3, a first motor 4 is arranged below the feeding pipe 3, the first motor 4 is rotatably connected with a first motor shaft 5, the first motor shaft 5 is rotatably connected with a spiral transmission set 6, the spiral transmission set 6 is rotatably connected with an auger 7, the auger 7 is arranged in the feeding pipe 3, the left bottom left side of the feeding pipe 3 is connected with a feeding hole 8, the top of the feeding pipe 3 is connected with a discharging pipe 9, a grid 10 is arranged in the discharging pipe 9, the left bottom left side of the discharging pipe 9 is provided with an air inlet 11, the right bottom right side of the discharging pipe 9 is connected with a light impurity feeding pipe 12, the bottom of the right end of the light impurity feeding pipe 12 is connected with a first light impurity discharging pipe 13, the bottom of the first light impurity discharging pipe 13 is connected with, a first fan 16 is arranged on the right side of the light impurity feeding pipe 12, the bottom of the discharging pipe 9 is connected with a first sieve box 17, a first screen 18 is arranged in the first sieve box 17, the right side of the bottom of the first sieve box 17 is connected with a second light impurity discharging pipe 19, the second light impurity discharging pipe 19 is connected with the left side of the top of the first impurity storage box 14, a first discharging port 20 is arranged on the left side of the bottom of the first sieve box 17, the bottom of the first discharging port 20 is connected with the left side of the top of the second sieve box 21, a second screen 22 is arranged in the second sieve box 21, the left side of the second screen 22 is connected with the inner wall of the left side of the second sieve box 21 through a spring 23, a movable support 24 is rotatably connected on the right side of the second screen 22, a third screen 25 is rotatably connected on the lower end of the left side of the movable support 24, a connecting rod 26 is rotatably connected on the left side of, meanwhile, a baffle 27 is arranged at the right side of the third screen 25, a first roller 28 is rotatably connected at the right side of the movable bracket 24, a second discharge port 29 is arranged at the left side of the bottom of the second screen box 21, the bottom of the second discharge port 29 is connected with a material storage box 30, meanwhile, the right side of the bottom of the second screen box 21 is connected with a second impurity storage box 31, a second filter screen 32 is arranged in the second impurity storage box 31, and the second filter screen 32 is connected with the second fan 33, the first roller 28 is rotatably connected with a first belt 34, and the right side of the first belt 34 is rotatably connected with an eccentric wheel 35, the eccentric wheel 35 is rotatably connected with a rotating shaft 36, the rotating shaft 36 is rotatably connected with a second roller 37, and a second motor 38 is arranged at the left side of the rotating shaft 36, the second motor 38 is rotationally connected with a second motor shaft 39, and the second motor shaft 39 is rotatably connected with a third roller 40, the left end of the second belt 41 is rotatably connected with the third roller 40, and the right end of the second belt 41 is rotatably connected with the second roller 37.

The interior of the grid 10 of the embodiment is of a gap structure, the space between the gaps is larger than the diameter of the RMB one-yuan coin, and the corn seeds can be in a loose state after passing through the grid 10, so that the subsequent cleaning work is convenient.

The central point of the first filter screen 15 and the central point of the light impurity feeding pipe 12 are on the same horizontal straight line, so that a stable air channel is conveniently formed in the light impurity feeding pipe 12, and impurities doped in the corn seeds, which have large surface area and light weight, can be driven to rapidly enter the light impurity feeding pipe 12.

First screen cloth 18 is provided with 2, 2 first screen cloth 18 all is the slope form setting, and the first screen cloth 18 left side of upside is connected with first sieve case 17 left side inner wall, the first screen cloth 18 right side of downside is connected with first sieve case 17 right side inner wall simultaneously, the maize seed rolls downwards in the first screen cloth 18 surface nature of slope from first screen cloth 18 top left side, at rolling in-process, less impurity passes the mesh structure on first screen cloth 18 surface in the maize seed and falls into first sieve case 17 bottom and enter into the light miscellaneous discharging pipe 19 of second, carry out the secondary screening to the maize seed.

The surface of first screen cloth 18, second screen cloth 22 and third screen cloth 25 all is the mesh structure, and the clearance of first screen cloth 18 surface mesh structure is less than the clearance of second screen cloth 22 surface mesh structure, and the clearance of second screen cloth 22 surface mesh structure is less than the clearance of third screen cloth 25 surface mesh structure simultaneously, carries out the cubic screening to maize seed through first screen cloth 18, second screen cloth 22 and third screen cloth 25, improves the screening quality to maize seed.

Second sieve case 21 top is the mesh structure, and the air of being convenient for passes through second sieve case 21 top and enters into second sieve case 21 in, and the air pierces through the mesh structure on second screen cloth 22 and third screen cloth 25 surface and acceleratees impurity and enters into second storage box 31 sooner, has the effect of suppressing dirt simultaneously, and it is more convenient to use.

The connection mode of the second screen 22 and the third screen 25 is rotationally connected with the movable support 24, so that the second screen 22 and the third screen 25 are more flexible in vibration, the long-time vibration is prevented from influencing the service life of the second screen 22 and the third screen 25, and the use safety is improved.

Second screen cloth 22, third screen cloth 25 all constitute telescopic machanism with spring 23, and telescopic machanism's flexible distance is less than spring 23's initial length, and spring 23 can play effectual supporting role, and the deformation through spring 23 can improve second screen cloth 22 and third screen cloth 25's vibration effect, further improves screening efficiency and screening quality.

The top level of baffle 27 is higher than the level of second screen cloth 22 bottom right side, and when the maize seed fell to the third screen cloth 25 right side from the second screen cloth 22 right side, baffle 27 can prevent effectively that the seed from splashing third screen cloth 25, improves the convenience of use.

The working principle of the invention is as follows: when the air-screen corn seed cleaning machine with the double-screen box function is used, firstly, corn seeds to be cleaned are poured into a feeding hole 8, an external power supply is switched on, a first motor 4 is started, a spiral transmission group 6 and an auger 7 are driven to rotate through a first motor shaft 5, the rotating auger 7 drives the corn seeds to move upwards to a discharging pipe 9, the corn seeds pass through a grating 10 under the action of gravity and fall in a loose shape, impurities in the corn seeds are separated from the corn seeds, a first fan 16 is started to drive external air to enter the discharging pipe 9 from an air inlet 11, and drive the impurities doped in the corn seeds, which are lighter in weight and have larger surface area, to enter a light impurity box 12, the air passes through a first filter screen 15 to be discharged, and the impurities are blocked by the first filter screen 15 and fall into a first impurity storage box 14 through a first light impurity discharging pipe 13 to be stored, the heavier impurities such as corn seeds, sand and the like fall downwards to the surface of the first screen mesh 18 on the upper side in the first screen box 17, roll along the surface of the first screen mesh 18 on the upper side under the action of gravity, fall to the surface of the first screen mesh 18 on the lower side, and roll to the first discharge hole 20 along the surface of the first screen mesh 18 on the lower side, in the process of rolling the corn seeds, the impurities such as the finer sand and the like in the corn seeds pass through the mesh structure on the surface of the first screen mesh 18 and fall to the bottom of the first screen box 17, finally enter the first impurity storage box 14 through the second light impurity discharge pipe 19 for storage, the corn seeds fall to the surface of the second screen mesh 22 in the second screen box 21 through the first discharge hole 20 and start to roll rightwards along the surface of the second screen mesh 22, the second motor 38 is started, the third roller 40 and the second belt 41 are driven to rotate through the second motor shaft 39, the second belt 41 drives the second roller 37 and the rotating shaft 36 to rotate, the eccentric wheel 35 is driven by the rotating shaft 36 to rotate, the first belt 34 and the first roller 28 are driven by the rotating eccentric wheel 35 to rotate, vibration generated in the rotating process of the eccentric wheel 35 is transmitted to the movable support 24, the movable support 24 drives the second screen 22 and the third screen 25 to vibrate, the left sides of the second screen 22 and the third screen 25 are kept fixed through the spring 23 and the vibration effect is improved through the deformation of the spring 23 in the vibrating process, in the process that corn seeds roll on the surface of the second screen 22, the vibration of the second screen 22 accelerates the separation of impurities and the corn seeds and the separation of the impurities and the corn seeds pass through the second screen 32 and the third screen 25 to fall into the bottom of the second screen box 21, when the corn seeds roll to the surface of the third screen 25, the left roll is started, the second fan 33 is started to drive outside air to pass through a mesh structure at the top of the second screen box 21 to enter the second screen box 21, and pass the mesh structure on second screen cloth 22 and third screen cloth 25 surface, it enters into second screen cloth 21 bottom and finally enters into second miscellaneous case 31 and stores to accelerate impurity to pass second screen cloth 22 and third screen cloth 25 faster, second screen cloth 32 can stop impurity and dust in second miscellaneous case 31, maize seed rolls to second discharge gate 29 in the back that finishes screening, and roll to storage case 30 in through second discharge gate 29 and store, after all maize seeds are cleaned, the maize seed that will clean finishes concentrates and collects the storage and can, this is accomplished a series of works.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims

1. The utility model provides an air screen formula maize seed cleaner with two sieve casees functions, includes base (1) and second belt (41), its characterized in that: the device is characterized in that a fixed frame (2) is arranged at the top of the base (1), a feeding pipe (3) is arranged on the left side of the fixed frame (2), a first motor (4) is arranged below the feeding pipe (3), the first motor (4) is rotatably connected with a first motor shaft (5), the first motor shaft (5) is rotatably connected with a spiral transmission set (6), the spiral transmission set (6) is rotatably connected with a packing auger (7), the packing auger (7) is arranged in the feeding pipe (3), the left side of the left bottom of the feeding pipe (3) is connected with a feeding port (8), the top of the feeding pipe (3) is connected with a discharging pipe (9), a grid (10) is arranged in the discharging pipe (9), an air inlet (11) is arranged on the left side of the bottom of the discharging pipe (9), the right side of the bottom of the discharging pipe (9) is connected with a light impurity feeding pipe (12), the bottom of the right end of the light, and the bottom of the first light impurity discharging pipe (13) is connected with the right side of the top of the first impurity storage box (14), the right side of the inside of the light impurity feeding pipe (12) is provided with a first filter screen (15), the right side of the light impurity feeding pipe (12) is provided with a first fan (16), the bottom of the discharging pipe (9) is connected with a first screening box (17), a first screen mesh (18) is arranged in the first screening box (17), the right side of the bottom of the first screening box (17) is connected with a second light impurity discharging pipe (19), the second light impurity discharging pipe (19) is connected with the left side of the top of the first impurity storage box (14), the left side of the bottom of the first screening box (17) is provided with a first discharging port (20), the bottom of the first discharging port (20) is connected with the left side of the top of the second screening box (21), the second screening box (21) is provided with a second screen mesh (22), and the left side of the second screen mesh (22) is connected with the inner wall of the left side, the right side of the second screen (22) is rotatably connected with a movable support (24), the lower end of the left side of the movable support (24) is rotatably connected with a third screen (25), the left side of the third screen (25) is rotatably connected with a connecting rod (26), the left side of the connecting rod (26) is connected with the inner wall of the left side of the second screen box (21) through a spring (23), meanwhile, the right side of the third screen (25) is provided with a baffle (27), the right side of the movable support (24) is rotatably connected with a first roller (28), the left side of the bottom of the second screen box (21) is provided with a second discharge hole (29), the bottom of the second discharge hole (29) is connected with a storage box (30), the right side of the bottom of the second screen box (21) is connected with a second impurity storage box (31), a second filter screen (32) is arranged in the second impurity storage box (31), and the second filter screen (32) is, first running roller (28) rotate and are connected with first belt (34), and first belt (34) right side is rotated and is connected with eccentric wheel (35), eccentric wheel (35) internal rotation is connected with pivot (36), rotate in pivot (36) and be connected with second running roller (37), and pivot (36) left side is provided with second motor (38), second motor (38) are rotated and are connected with second motor shaft (39), and second motor shaft (39) rotate and are connected with third running roller (40), second belt (41) left end is rotated and is connected with third running roller (40), and second belt (41) right-hand member rotates and is connected with second running roller (37).

2. The air-screen corn seed cleaner with double-screen box function as claimed in claim 1, characterized in that: the interior of the grating (10) is of a gap structure, and the space between the gaps is larger than the diameter of the RMB one-yuan coin.

3. The air-screen corn seed cleaner with double-screen box function as claimed in claim 1, characterized in that: the central point of the first filter screen (15) and the central point of the light impurity feeding pipe (12) are on the same horizontal straight line.

4. The air-screen corn seed cleaner with double-screen box function as claimed in claim 1, characterized in that: first screen cloth (18) are provided with 2, and 2 first screen cloth (18) all are the slope form setting, and the first screen cloth (18) left side of upside is connected with first sieve case (17) left side inner wall, and first screen cloth (18) right side of downside is connected with first sieve case (17) right side inner wall simultaneously.

5. The air-screen corn seed cleaner with double-screen box function as claimed in claim 1, characterized in that: the surfaces of the first screen (18), the second screen (22) and the third screen (25) are all in mesh structures, the gaps of the mesh structures on the surface of the first screen (18) are smaller than those of the mesh structures on the surface of the second screen (22), and the gaps of the mesh structures on the surface of the second screen (22) are smaller than those of the mesh structures on the surface of the third screen (25).

6. The air-screen corn seed cleaner with double-screen box function as claimed in claim 1, characterized in that: the top of the second sieve box (21) is in a mesh structure.

7. The air-screen corn seed cleaner with double-screen box function as claimed in claim 1, characterized in that: the second screen (22) and the third screen (25) are rotatably connected with the movable support (24).

8. The air-screen corn seed cleaner with double-screen box function as claimed in claim 1, characterized in that: the second screen (22) and the third screen (25) form a telescopic mechanism together with the spring (23), and the telescopic distance of the telescopic mechanism is smaller than the initial length of the spring (23).

9. The air-screen corn seed cleaner with double-screen box function as claimed in claim 1, characterized in that: the top of the baffle (27) is higher than the right side of the bottom of the second screen (22).