CN112058668A

CN112058668A - Seed winnowing equipment for agricultural production and use method thereof

Info

Publication number: CN112058668A
Application number: CN202011066527.6A
Authority: CN
Inventors: 权金金
Original assignee: Xiaoxian Babao Livestock And Poultry Farmers' Professional Cooperative
Current assignee: Pingyu Guiyuan Ecological Agriculture Development Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2020-12-11
Anticipated expiration: 2040-09-30
Also published as: CN112058668B

Abstract

The invention discloses seed winnowing equipment for agricultural production, which comprises a winnowing box, wherein the winnowing box consists of a feeding mechanism, an impurity removing mechanism, a winnowing mechanism and a cleaning mechanism, the feeding mechanism comprises a feeding cylinder, the feeding cylinder is fixedly connected with one end of the upper surface of the winnowing box, full seeds can fall off on screens with different aperture densities by arranging the winnowing mechanism and the impurity removing mechanism in the winnowing box, so that the seeds with different particle sizes are screened, and the dry and shriveled seeds or only the residual skin sacs fall into a water tank in strong wind flow, so that the winnowing equipment not only can play a role of screening, but also can play a role of dust prevention and is more beneficial to production, the seeds with different sizes are rapidly screened, the whole working efficiency is greatly improved, and in addition, after part of the seeds which cannot be screened in time fall into the return box, the winnowing is continuously carried out, the seed availability after screening is ensured to be higher, and the seed can be screened circularly, so that the success rate of seed screening is improved, and the practicability is higher.

Description

Seed winnowing equipment for agricultural production and use method thereof

Technical Field

The invention relates to the technical field of agriculture, in particular to seed winnowing equipment for agricultural production and a use method thereof.

Background

The air separation is a method for removing impurities by wind power by utilizing the difference of the suspension speed between materials and impurities. The aim of air separation is to remove light impurities and dust and also to remove part of stone, soil and other heavy impurities, and this method is commonly used for cleaning oil materials such as cotton seeds and sunflower seeds and for removing dust and foreign matters in the industries of grain, tobacco and the like.

Winnowing, also known as air flow separation, is based on the principle that solid waste particles have a high density, a high sedimentation end velocity and a relatively short movement distance under the action of air flow, and a low density, a low sedimentation end velocity and a relatively long movement distance. The method is suitable for sorting solid waste with similar particle shape and size. Sometimes, the raw materials can be crushed and screened first and then subjected to wind power sorting. Wind power separation plants are divided into three types, horizontal, vertical and inclined, according to the main flow direction of the working air flow, among which vertical air flow winnowing machines are most widely used.

In some seed processing factories, the seed to different particle sizes is filtered, more adopt the vibration screening machine, the seed of following the screening out takes out, to the remaining shrivelled or just remaining bad seed of leather bag of seed kind of selecting, it needs to filter to have, carry out artifical screening a bit, work efficiency has just so greatly reduced, increase manpower resources, filter through simple winnowing equipment a bit, work efficiency is low, and winnowing equipment respectively is as an organic whole with traditional sieve separator, the cost is improved, also can influence certain work efficiency equally.

Disclosure of Invention

The invention aims to provide seed winnowing equipment for agricultural production and a use method thereof, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a seed winnowing device for agricultural production comprises a winnowing box, wherein the winnowing box consists of a feeding mechanism, an impurity removing mechanism, a winnowing mechanism and a cleaning mechanism, the feeding mechanism comprises a feeding cylinder, the feeding cylinder is fixedly connected to one end of the upper surface of the winnowing box, the feeding cylinder penetrates through the winnowing box and is 60 degrees with the upper surface of the winnowing box, a first sealing plate and a second sealing plate penetrate through the upper surface of the feeding cylinder, and the second sealing plate is arranged below the first sealing plate;

the impurity removing mechanism comprises a first water tank and a second water tank, the first water tank and the second water tank are respectively connected to two ends of the winnowing box in a sliding mode, the first water tank is arranged below the upper charging barrel, the first water tank and the second water tank are located on the reverse sides of the winnowing box and are fixedly connected with exhaust pipes, the two exhaust pipes penetrate through the first water tank and the second water tank, the bottom ends of the two exhaust pipes are arranged below the horizontal planes inside the first water tank and the second water tank, and the first water tank and the second water tank are located below the exhaust pipes and are fixedly connected with drain pipes;

the winnowing mechanism comprises a first fan and a sieve plate, the first fan is fixedly connected with the upper surface of the winnowing box and positioned at one side of the upper charging barrel, the air outlet of the first fan is fixedly connected with a first air pipe, the first air pipe penetrates through the top surface of the winnowing box, the bottom end of the first air pipe is fixedly connected with an exhaust hood, a first clapboard, a second clapboard and a third clapboard are fixedly connected with the inner cavity of the winnowing box and positioned at one side of the first water tank, the heights of the first partition plate, the second partition plate and the third partition plate are gradually reduced, a sieve plate is fixedly connected between the top ends of the first partition plate, the second partition plate and the third partition plate, the sieve plate is arranged below the exhaust hood and the upper charging barrel, and a certain distance is arranged between one end of the sieve plate close to the first water tank and the inner side wall of the winnowing box, the sieve plate is positioned between the first partition plate and the second partition plate, and a first sieve net and a second sieve net are respectively arranged between the second partition plate and the third partition plate;

clearance mechanism includes the feed back case, the inside of winnowing box and be located sliding connection have the feed back case between No. two water tanks and No. three baffles, just the height that highly is less than the sieve minimum to the winnowing box bottom surface of feed back case, the inner chamber below of feed back case is provided with the mounting groove, fixedly connected with cylinder in the mounting groove, the telescopic link top fixedly connected with of cylinder lifts the board, just lift the side of board and the inside wall laminating of feed back case, the feed back case is close to one side of No. three baffles and is located the lifting board top and be provided with the breach, No. two fans of one side fixedly connected with of feed back case are close to No. three baffles, one side of winnowing box and be located No. two fan one end and be provided with the fresh air inlet, No. two air pipes of air outlet fixedly connected with of No. two fans, just No. two are facing the.

In a further embodiment, a first magnet is fixedly mounted on one side of the second sealing plate and located on the upper surface of the upper charging barrel, a second magnet is fixedly mounted on the upper surface of the upper charging barrel and located below the first magnet, and the bottom surface of the first magnet and the top surface of the second magnet are attracted in opposite polarity.

In further embodiment, No. one extension plate of last fixed surface of a water tank and No. two water tanks, No. two extension plates of last fixed surface of feed back case, the winnowing box is located and is equipped with No. two seal grooves and a seal groove on the side that No. two extension plates and two extension plates correspond respectively, just No. two sealed pads of No. two fixedly connected with and a sealed pad on No. two extension plates and two extension plate medial surfaces respectively.

In a further embodiment, a second handle and a first handle are fixedly connected to the outer side surfaces of the second elongated plate and the two first elongated plates respectively.

In a further embodiment, one side of winnowing box just is located and is equipped with No. two discharge gates and a discharge gate between a baffle and No. two baffles and No. three baffles respectively, just all articulated in a discharge gate and No. two discharge gates have the door plant.

In further embodiments, the pore size density of the first screen is greater than the pore size density of the second screen.

In a further embodiment, an angle smaller than 90 degrees is formed between the second air pipe and the feed back box, and the second air pipe is arranged in a downward inclination mode.

In a further embodiment, a baffle is fixedly connected to the inner side wall of the winnowing box and positioned on one side of the second water tank, and the baffle is arranged above the material return box.

In a further embodiment, a method of using an agricultural seed winnowing apparatus comprises the steps of:

SS 001: firstly, closing a second sealing plate, opening a first sealing plate, pouring a pile of seeds into the feeding cylinder, after the feeding cylinder is filled with the seeds, closing the first sealing plate, pouring a certain amount of clear water into a first water tank and a second water tank, closing the first water tank and the second water tank, and powering on a first fan and a second fan;

SS 002: opening a second sealing plate, enabling seeds in the upper charging barrel to fall into the winnowing box along the inclined upper charging barrel, enabling the seeds to roll off on the sieve plate, enabling small and full seeds to fall into a space between a first partition plate and a second partition plate from a first screen in advance, enabling large and full seeds to fall into a space between the second partition plate and a third partition plate from the second screen, enabling the seeds which are shriveled and only leave the bark pocket to fly towards one side of the first water tank under the blowing of strong wind of a first fan, enabling the air flowing into clear water, enabling dust on the surfaces of the seeds to fall into the clear water along with the flowing of the air, and finally discharging the air through an exhaust pipe of the first water tank;

and (4) SS 003: in the process, a small number of full seeds with small particles and full size and some shriveled seeds can not be screened out in time and fall into a feed back box along a sieve plate, the air cylinder can be opened at the moment, the telescopic rod stretches and retracts to drive the lifting plate to move up and down, so that the seeds on the surface of the lifting plate can be vibrated up and down, the second fan blows air towards the feed back box, and the shriveled seeds are blown to one side of the second water tank under the blowing of strong air until the shriveled seeds fall into the second water tank to obtain clear water;

SS 004: and finally, after the seeds in the feeding cylinder are completely discharged, closing all the electrical equipment, opening the two door plates, taking out the seeds with different sizes, simultaneously pulling out the material return box, taking out the seeds with the sizes in the box, putting the seeds into the feeding cylinder again, and performing next round of circulating operation.

Compared with the prior art, the invention has the beneficial effects that: through set up selection by winnowing mechanism and edulcoration mechanism in the wind selection box, plump seed can drop on the screen cloth of different aperture density, thereby select the seed of different particle sizes, and the bad seed of shrivelled or only remaining leather bag then falls into in the water tank in strong wind flow, and accomodate by the clear water, and the dust that is filled in the air also falls into aquatic equally, not only can play the screening effect, and can also play dustproof effect, more do benefit to production, the seed of equidimension not is screened fast, bad seed is got rid of fast again, make whole work efficiency improve greatly, the seed that partly fails in time to screen falls into back the workbin back in addition, under the vibration of cylinder, strong wind blows unsteady seed, continue to carry out the selection by winnowing, guarantee that the seed availability after the screening is higher, and circulated screening, make the seed screening success rate obtain improving, the practicality is higher.

Drawings

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

FIG. 2 is a cross-sectional view of an upper barrel of the present invention;

FIG. 3 is a cross-sectional view of a water tank of the present invention;

FIG. 4 is a schematic view of a screen deck structure according to the present invention;

FIG. 5 is a cross-sectional view of the feed back bin of the present invention;

fig. 6 is an overall sectional view of the present invention.

In the figure: 1. a winnowing box; 2. a feeding mechanism; 201. feeding a material barrel; 202. a first sealing plate; 203. a second sealing plate; 204. a first magnet; 205. a magnet II; 3. an impurity removal mechanism; 301. a first water tank; 302. a first lengthened plate; 303. a drain pipe; 304. a first sealing gasket; 305. an exhaust pipe; 306. a first handle; 307. a first sealing groove; 308. a second water tank; 4. a winnowing mechanism; 401. a first fan; 402. a first discharge hole; 403. a second discharge hole; 404. a door panel; 405. a first air pipe; 406. an exhaust hood; 407. a first separator plate; 408. a second separator plate; 409. a third clapboard; 410. a sieve plate; 411. a first screen mesh; 412. a second screen mesh; 5. a cleaning mechanism; 501. returning the material tank; 502. a second lengthened plate; 503. a second sealing groove; 504. a second handle; 505. a second sealing gasket; 506. a notch; 507. an air inlet hole; 508. mounting grooves; 509. a cylinder; 510. lifting the plate; 511. a second fan; 512. a second air pipe; 513. and a baffle plate.

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. 1-6, the present invention provides a technical solution: a seed winnowing device for agricultural production comprises a winnowing box 1, wherein the winnowing box 1 consists of a feeding mechanism 2, an impurity removing mechanism 3, a winnowing mechanism 4 and a cleaning mechanism 5, the feeding mechanism 2 comprises a feeding barrel 201, the feeding barrel 201 is fixedly connected to one end of the upper surface of the winnowing box 1, the feeding barrel 201 penetrates through the winnowing box 1 and is 60 degrees with the upper surface of the winnowing box 1, a first sealing plate 202 and a second sealing plate 203 penetrate through the upper surface of the feeding barrel 201, and the second sealing plate 203 is arranged below the first sealing plate 202;

the impurity removing mechanism 3 comprises a first water tank 301 and a second water tank 308, the first water tank 301 and the second water tank 308 are respectively connected to two ends of the winnowing box 1 in a sliding mode, the first water tank 301 is arranged below the upper charging barrel 201, exhaust pipes 305 are fixedly connected to the first water tank 301 and the second water tank 308 on opposite sides of the winnowing box 1, the two exhaust pipes 305 penetrate through the first water tank 301 and the second water tank 308, the bottom ends of the exhaust pipes are arranged below the horizontal planes in the first water tank 301 and the second water tank 308, and drain pipes 303 are fixedly connected to the first water tank 301 and the second water tank 308 below the exhaust pipes 305;

the winnowing mechanism 4 comprises a fan 401 and a sieve plate 410, the upper surface of the winnowing box 1 is fixedly connected with the fan 401 on one side of the charging barrel 201, the air outlet of the fan 401 is fixedly connected with an air pipe 405, the air pipe 405 penetrates through the top surface and the bottom of the winnowing box 1 and is fixedly connected with an exhaust hood 406, the inner cavity of the winnowing box 1 is fixedly connected with a baffle 407, a baffle 408 and a baffle 409 on one side of the water tank 301, the heights of the baffle 407, the baffle 408 and the baffle 409 are gradually reduced, the sieve plate 410 is fixedly connected between the tops of the baffle 407, the baffle 408 and the baffle 409, the sieve plate 410 is arranged below the exhaust hood 406 and the charging barrel 201, and a certain distance is arranged between one end of the sieve plate 410, which is close to the water tank 301, and the inner side wall of the winnowing box 1, a first screen 411 and a second screen 412 are respectively arranged between the first clapboard 407 and the second clapboard 408 and between the second clapboard 408 and the third clapboard 409 of the sieve plate 410;

the cleaning mechanism 5 comprises a material return box 501, the interior of the winnowing box 1 is positioned between a second water tank 308 and a third partition 409 in a sliding connection mode, the material return box 501 is lower than the height from the lowest end of a screen plate 410 to the inner bottom surface of the winnowing box 1, a mounting groove 508 is arranged below an inner cavity of the material return box 501, a cylinder 509 is fixedly connected in the mounting groove 508, a lifting plate 510 is fixedly connected to the top end of a telescopic rod of the cylinder 509, the side surface of the lifting plate 510 is attached to the inner side wall of the material return box 501, a notch 506 is arranged on one side, close to the third partition 409, of the material return box 501 and above the lifting plate 510, a second fan 511 is fixedly connected to one side, close to the material return box 501, of the air inlet box 1 is positioned at one end of the second fan 511, and an air outlet 512 of the second fan 511 is fixedly connected to the second air pipe 512, and the second air pipe 512 faces the notch 506 of the material return box 501.

In one embodiment, a first magnet 204 is fixedly mounted on one side of the second sealing plate 203 and located on the upper surface of the upper barrel 201, a second magnet 205 is fixedly mounted on the upper surface of the upper barrel 201 and located below the first magnet 204, and the bottom surface of the first magnet 204 and the top surface of the second magnet 205 are attracted oppositely.

By adopting the above case, it is ensured that the second closing plate 203 is not forced to open by the pressure of the seeds after being closed.

In one of them embodiment, No. one extension plate 302 of last fixed surface of No. one water tank 301 and No. two water tanks 308, No. two extension plates 502 of last fixed surface of feed back box 501 is connected with, No. two seal grooves 503 and No. one seal groove 307 are equipped with respectively on the side that winnowing box 1 is located No. two extension plates 502 and two extension plates 302 and corresponds, just No. two sealed pads 505 of fixed connection and a sealed pad 304 of fixed connection respectively on No. two extension plates 502 and two extension plates 302 medial surfaces.

By adopting the case, the sealing function is achieved, and the influence on the air of a workshop caused by the discharge of dust is avoided.

In one embodiment, a second handle 504 and a first handle 306 are fixedly connected to the outer side surfaces of the second elongated plate 502 and the two first elongated plates 302, respectively.

By adopting the above case, it is convenient to pull the first water tank 301 and the second water tank 308 and the return tank 501.

In one embodiment, a second discharge hole 403 and a first discharge hole 402 are respectively formed in one side of the winnowing box 1 and between a first partition 407 and a second partition 408, and between a second partition 408 and a third partition 409, and door panels 404 are hinged in the first discharge hole 402 and the second discharge hole 403.

By adopting the above case, the screened large and small particle seeds can be conveniently taken out.

In one embodiment, the pore size density of the first screen 411 is greater than the pore size density of the second screen 412.

By adopting the above case, the full seeds with different particle sizes can be conveniently screened.

In one embodiment, the second air pipe 512 forms an angle smaller than 90 ° with the feed back box 501, and the second air pipe 512 is disposed in a downward inclination manner.

By adopting the case, strong wind can be conveniently blown to the vibrating seeds, so that the air separation is carried out.

In one embodiment, a baffle 513 is fixedly connected to the inner side wall of the winnowing box 1 and located on one side of the second water tank 308, and the baffle 513 is arranged above the feed back box 501.

By using the above-described case, it is ensured that the floating shrivelled seeds move toward the second water tank 308 side.

In one embodiment, the use method of the seed winnowing device for agricultural production comprises the following steps:

SS 001: firstly, closing the second sealing plate 203, opening the first sealing plate 202, pouring a pile of seeds into the upper charging barrel 201, after the upper charging barrel 201 is filled with the seeds, closing the first sealing plate 202, pouring a certain amount of clear water into the first water tank 301 and the second water tank 308, closing the first water tank 301 and the second water tank 308, and electrifying the first fan 401 and the second fan 511;

SS 002: then the second closing plate 203 is opened, seeds in the upper charging barrel 201 fall into the winnowing box 1 along the inclined upper charging barrel 201, the seeds roll off on the sieve plate 410, small and full seeds fall into a space between the first partition 407 and the second partition 408 from the first screen 411 in advance, large and full seeds fall into a space between the second partition 408 and the third partition 409 from the second screen 412, the seeds which are shriveled and only have residual skin bags fly towards one side of the first water tank 301 under the blowing of strong wind of the first fan 401, finally flowing air falls into clear water, meanwhile, dust on the surfaces of the seeds also falls into the clear water along with the flowing of the air, and the air is finally discharged from the exhaust pipe 305 of the first water tank 301;

and (4) SS 003: in the process, a small number of full seeds with small particles and full size and some shriveled seeds can not be screened out in time and fall into the material return box 501 along the sieve plate 410, the air cylinder 509 can be opened at the moment, the telescopic rod stretches and retracts to drive the lifting plate 510 to move up and down, so that the seeds on the surface of the lifting plate 510 can be vibrated up and down, the second fan 511 blows air towards the material return box 501, and the shriveled seeds are blown to one side of the second water tank 308 under the blowing of strong wind until the shriveled seeds fall into the second water tank 308 to obtain clear water;

SS 004: finally, after the seeds in the upper charging barrel 201 are completely discharged, all the electrical equipment are closed, the two door plates 404 are opened, the seeds with different sizes can be taken out, the material return box 501 can be pulled out, the seeds with the sizes in the box can be taken out, and the seeds are put into the upper charging barrel 201 again for the next round of circulation operation.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a seed winnowing equipment of agricultural production, includes winnowing box (1), its characterized in that: the winnowing box (1) is composed of a feeding mechanism (2), an impurity removing mechanism (3), a winnowing mechanism (4) and a cleaning mechanism (5), the feeding mechanism (2) comprises a feeding barrel (201), the feeding barrel (201) is fixedly connected to one end of the upper surface of the winnowing box (1), the feeding barrel (201) penetrates through the winnowing box (1) and is 60 degrees with the upper surface of the winnowing box (1), a first sealing plate (202) and a second sealing plate (203) penetrate through the upper surface of the feeding barrel (201), and the second sealing plate (203) is arranged below the first sealing plate (202);

the impurity removing mechanism (3) comprises a first water tank (301) and a second water tank (308), the first water tank (301) and the second water tank (308) are respectively connected to two ends of the winnowing box (1) in a sliding mode, the first water tank (301) is arranged below the upper charging barrel (201), the first water tank (301) and the second water tank (308) are located on opposite sides of the winnowing box (1) and are both fixedly connected with exhaust pipes (305), the two exhaust pipes (305) penetrate through the first water tank (301) and the second water tank (308), the bottom ends of the two exhaust pipes are arranged below the horizontal planes in the first water tank (301) and the second water tank (308), and the first water tank (301) and the second water tank (308) are located below the exhaust pipes (305) and are both fixedly connected with drain pipes (303);

the winnowing mechanism (4) comprises a first fan (401) and a sieve plate (410), the upper surface of the winnowing box (1) is fixedly connected with the first fan (401) on one side of the upper charging barrel (201), the air outlet of the first fan (401) is fixedly connected with an air pipe (405), the air pipe (405) penetrates through the top surface and the bottom end of the winnowing box (1) and is fixedly connected with an exhaust hood (406), the inner cavity of the winnowing box (1) is fixedly connected with a first partition plate (407), a second partition plate (408) and a third partition plate (409) on one side of the first water tank (301), the heights of the first partition plate (407), the second partition plate (408) and the third partition plate (409) are gradually reduced, the sieve plate (410) is fixedly connected between the tops of the first partition plate (407), the second partition plate (408) and the third partition plate (409), and the sieve plate (410) is arranged below the exhaust hood (406) and the upper charging barrel (201), a certain distance is reserved between one end of the sieve plate (410), close to the first water tank (301), and the inner side wall of the air separation box (1), and a first screen (411) and a second screen (412) are respectively arranged between the sieve plate (410) and the first partition plate (407) and the second partition plate (408) and between the second partition plate (408) and the third partition plate (409);

the cleaning mechanism (5) comprises a material return box (501), the material return box (501) is arranged in the winnowing box (1) and is positioned between a second water tank (308) and a third partition plate (409), the height of the material return box (501) is lower than the height from the lowest end of a sieve plate (410) to the inner bottom surface of the winnowing box (1), a mounting groove (508) is arranged below an inner cavity of the material return box (501), an air cylinder (509) is fixedly connected in the mounting groove (508), a lifting plate (510) is fixedly connected to the top end of a telescopic rod of the air cylinder (509), the side surface of the lifting plate (510) is attached to the inner side wall of the material return box (501), a notch (506) is arranged on one side, close to the third partition plate (409), of the third partition plate (409) and is fixedly connected to a second fan (511) on one side, close to the material return box (501), one side of winnowing box (1) just is located No. two fan (511) one end and is provided with fresh air inlet (507), No. two tuber pipes (512) of air outlet fixedly connected with of No. two fan (511), just No. two tuber pipes (512) are just facing breach (506) of feed back case (501).

2. The agricultural seed winnowing apparatus of claim 1, wherein: no. two shrouding (203) one side and the upper surface fixed mounting who is located feed cylinder (201) have a magnet (204), the upper surface of going up feed cylinder (201) and the below fixed mounting that is located a magnet (204) have No. two magnet (205), just the bottom surface of a magnet (204) and the top surface opposite poles of a magnet (205) attract.

3. The agricultural seed winnowing apparatus of claim 1, wherein: no. one last fixed surface of water tank (301) and No. two water tank (308) is connected with extension plate (302), No. two extension plate (502) of last fixed surface of feed back case (501), winnowing box (1) is located and is equipped with No. two seal groove (503) and seal groove (307) on the side that No. two extension plate (502) and two extension plate (302) correspond respectively, just No. two seal pad (505) and a sealed pad (304) of fixedly connected with respectively on No. two extension plate (502) and two extension plate (302) medial surfaces.

4. An agricultural seed winnowing apparatus according to claim 3, wherein: the outer side surfaces of the second lengthened plate (502) and the two first lengthened plates (302) are fixedly connected with a second handle (504) and a first handle (306) respectively.

5. The agricultural seed winnowing apparatus of claim 1, wherein: one side of winnowing box (1) just is located and is equipped with No. two discharge gates (403) and discharge gate (402) between baffle (407) and No. two baffle (408) and No. three baffle (409) respectively, just all articulated in discharge gate (402) and No. two discharge gates (403) have door plant (404).

6. The agricultural seed winnowing apparatus of claim 1, wherein: the aperture density of the first screen (411) is larger than that of the second screen (412).

7. The agricultural seed winnowing apparatus of claim 1, wherein: an angle smaller than 90 degrees is formed between the second air pipe (512) and the material return box (501), and the second air pipe (512) is arranged in a downward inclined mode.

8. The agricultural seed winnowing apparatus of claim 1, wherein: on the inside wall of winnowing box (1) and be located No. two water tank (308) one side fixedly connected with baffle (513), just baffle (513) set up the top at feed back box (501).

9. Use of an agricultural seed winnowing device according to claims 1-8, characterized in that it comprises the following steps:

SS 001: firstly, closing a second sealing plate (203), opening a first sealing plate (202), pouring a pile of seeds into an upper charging barrel (201), after the upper charging barrel (201) is filled with the seeds, closing the first sealing plate (202), pouring a certain amount of clear water into a first water tank (301) and a second water tank (308), closing the first water tank (301) and the second water tank (308), and electrifying a first fan (401) and a second fan (511);

SS 002: then, a second closing plate (203) is opened, seeds in the upper charging barrel (201) fall into the winnowing box (1) along the inclined upper charging barrel (201), the seeds roll on the sieve plate (410), small and full seeds fall into a space between a first partition plate (407) and a second partition plate (408) from a first screen (411) in advance, large and full seeds fall into a space between the second partition plate (408) and a third partition plate (409) from a second screen (412), the dry and flat seeds and only the seeds of the residual bark sacs fly towards one side of the first water tank (301) under the blowing of strong wind of a first fan (401), and finally the flowing air falls into clear water, meanwhile, dust on the surfaces of the seeds also falls into the clear water along with the flowing of the air, and the air is finally discharged through an exhaust pipe (305) of the first water tank (301);

and (4) SS 003: in the process, a small number of full seeds with small particles and shriveled seeds can not be screened out in time and fall into the material return box (501) along the sieve plate (410), the air cylinder (509) can be opened at the moment, the telescopic rod stretches and retracts to drive the lifting plate (510) to move up and down, so that the seeds on the surface of the lifting plate (510) can be vibrated up and down, the second fan (511) blows air into the material return box (501), and the shriveled seeds are blown to one side of the second water tank (308) under the blowing of strong air until the shriveled seeds fall into the second water tank (308) to obtain clear water;

SS 004: and finally, after the seeds in the feeding barrel (201) are completely discharged, all electrical equipment are closed, the two door plates (404) are opened, the seeds with different sizes can be taken out, the material return box (501) can be pulled out, the seeds with large and small particles in the box are taken out and put into the feeding barrel (201) again, and the next round of circulation operation is carried out.