CN111842153B

CN111842153B - Grain winnowing device with buffering function and using method thereof

Info

Publication number: CN111842153B
Application number: CN202010731226.4A
Authority: CN
Inventors: 汤友权
Original assignee: Laifeng Grain And Oil Collection And Storage Co
Current assignee: Laifeng County Tubao Grain Reserve Co.,Ltd.
Priority date: 2020-07-27
Filing date: 2020-07-27
Publication date: 2022-08-19
Anticipated expiration: 2040-07-27
Also published as: CN111842153A

Abstract

The invention provides a grain winnowing device with a buffering function and a using method thereof. The grain winnowing device with the buffering function comprises: mounting a plate; the upper surface of the mounting plate is fixedly connected with the winnowing box through a bracket; the air separation mechanism is connected with the air separation box; cereal connects mechanism greatly, cereal connects mechanism and winnowing box to be connected greatly, and cereal connects mechanism to include that ripple rubber go-between, spring, silica gel pad, discharging pipe and cereal connect the funnel greatly, winnowing box's interior bottom is equipped with upper end open-ended cereal and connects the funnel greatly, and cereal connects the upper end opening part of funnel greatly and passes through the inner wall fixed connection of ripple rubber go-between and winnowing box, and cereal connects the interior diapire fixedly connected with silica gel pad of funnel greatly, and the thickness of silica gel pad is not less than 1 cm. The grain winnowing device with the buffering function and the use method thereof have the advantage of reducing the grain crushing probability.

Description

Grain winnowing device with buffering function and using method thereof

Technical Field

The invention relates to the field of grain processing, in particular to a grain winnowing device with a buffering function and a using method thereof.

Background

Cereals "are widely covered, and include rice, wheat, millet, soybean and other miscellaneous cereals. The cereals include rice, wheat, millet, soybean, etc., and are mainly plant seeds and fruits. Is a traditional staple food for many asian people. Cereals, not only refer to seeds of gramineous plants, but also can be roughly divided into three categories in China: cereal: including rice (indica rice, japonica rice, rice), wheat (wheat, barley, oat, rye), corn, sorghum, millet, yellow rice, buckwheat, etc.; a soybean protein: comprises soybean, broad bean, pea, mung bean, small red bean, kidney bean, etc.; potatoes: including sweet potato, also known as sweet potato or sweet potato, yam, taro, cassava, etc.

In the cereal course of working, need detach the impurity that has thoughtlessly wherein, the selection by winnowing is the common mode of cereal edulcoration, and when cereal selection by winnowing, in order to improve the contact time of cereal and air current, the height of winnowing box is generally higher, and the distance that cereal falls is great promptly for cereal is when the selection by winnowing, takes place the breakage easily, influences the quality of cereal.

Therefore, there is a need to provide a new grain winnowing device with a buffering function and a method for using the same to solve the above technical problems.

Disclosure of Invention

In order to solve the technical problems, the invention provides a grain winnowing device which can avoid grain breakage and has a buffering function and a using method thereof.

The invention provides a grain winnowing device with a buffering function, which comprises: mounting a plate; the upper surface of the mounting plate is fixedly connected with the winnowing box through a bracket; the air separation mechanism is connected with the air separation box; the grain receiving mechanism is connected with the winnowing box and comprises a corrugated rubber connecting ring, a spring, a silica gel pad, a discharging pipe and a grain receiving funnel, the grain receiving funnel with an opening at the upper end is arranged at the inner bottom of the winnowing box, the opening at the upper end of the grain receiving funnel is fixedly connected with the inner wall of the winnowing box through the corrugated rubber connecting ring, the silica gel pad is fixedly connected to the inner bottom wall of the grain receiving funnel, and the thickness of the silica gel pad is not less than 1 cm; a discharge pipe is connected to a discharge port at the lower end of the grain receiving funnel and penetrates through a through hole at the bottom of the winnowing box; the inner bottom wall of the winnowing box is connected with a plurality of springs, and the upper ends of the springs are connected with the outer surface of the grain receiving funnel; the smoke dust treatment mechanism is connected with the air outlet of the winnowing box and is also connected with the mounting plate; cereal is screening mechanism in advance, cereal is screening mechanism in advance and is connected with the winnowing box.

Preferably, the cereal connects mechanism still includes the lateral plate greatly, the surface integrated into one piece of discharging pipe has a plurality of evenly distributed's lateral plate, lateral plate and winnowing box sliding connection.

Preferably, selection by winnowing mechanism is including dividing air disk, air duct, air pump, air cock and feed gate, the last surface sliding connection of selection by winnowing box has the feed gate, and the surface connection of selection by winnowing box has the air pump, and the one end of air duct is connected to the gas outlet of air pump, and the other end of air duct is connected with the air disk of dividing, divides air disk and air duct face-to-back to install a plurality of air cocks, and the air cock runs through the selection by winnowing box setting, and the air outlet slope of air cock upwards sets up.

Preferably, the air separation mechanism further comprises a baffle plate, the air separation box is internally and fixedly connected with the baffle plates which are arranged in a staggered mode, and the baffle plates are obliquely and downwards arranged.

Preferably, the smoke dust treatment mechanism comprises a gas collecting hood, a straight pipe, a connecting pipe, a water injection pipe, an exhaust pipe and a water tank, the upper surface of the mounting plate is fixedly connected with the water tank, and the upper surface of the water tank is fixedly connected with the water injection pipe and the exhaust pipe which are mutually communicated with the interior of the water tank; the gas collecting channel is installed at the gas outlet of the winnowing box, the gas collecting channel is connected with a straight pipe through a connecting pipe, the straight pipe penetrates through the upper surface of the water tank and is arranged, and the bottom of the straight pipe is close to the inner bottom wall of the water tank.

Preferably, the connecting pipe is obliquely arranged, and one end of the connecting pipe close to the gas-collecting hood is positioned below the other end of the connecting pipe.

Preferably, the grain pre-screening mechanism comprises an electric control door, a rubber ring, a rotary cylinder, a feeding funnel, a pre-screening box, a vibrating motor, an impurity collecting box, a screen and a rubber ring, wherein the outer surface of the winnowing box, which is close to the top of the winnowing box, is fixedly connected with the impurity collecting box with an opening at the upper end, the edge of the upper surface of the impurity collecting box is fixedly connected with the rubber ring, the outer surface of the impurity collecting box is fixedly connected with the rotary cylinder, the output end of the rotary cylinder is fixedly connected with the pre-screening box with an opening at the lower end, the pre-screening box is positioned above the impurity collecting box, the screen is fixedly connected in the pre-screening box, and the lower surface of the screen is fixedly connected with the vibrating motor; the last fixed surface of prescreening the case is connected with rather than the inside feeding funnel that communicates each other, and prescreening the case and being close to the lateral wall of winnowing box and having seted up the mounting groove, installs automatically controlled door in the mounting groove, and the edge fixedly connected with rubber ring of mounting groove surface.

Preferably, the corners of the lower surface of the mounting plate are provided with support legs.

A grain winnowing device with a buffering function is used as follows:

a. the grain is fed into a pre-screening box through a feeding hopper, and the grain is pre-screened through the work of a vibration motor;

b. after the pre-screening is finished, the pre-screening box is rotated through the rotary air cylinder, and then the electric control door and the feeding door are opened, so that the pre-screened grains enter the winnowing box;

c. 2-3 minutes before the electric control door and the feeding door are opened, the air pump is started to enable the air nozzle to give out air, air flow blown out by the air nozzle is used for winnowing the pre-screened grains, and the grain winnowing quality is improved;

d. the grain after winnowing falls into the grain receiving funnel, and the impact force between the grain and the grain receiving funnel can be buffered through the deformation of the spring, so that the impact force applied to the grain is reduced, the probability of grain breakage is reduced, and the use reliability of the device is improved; the silica gel pad can also play a role in buffering, so that the probability of crushing grains is further reduced;

e. the grains fall into the grain receiving funnel and are discharged through the discharge pipe.

Compared with the related art, the grain winnowing device with the buffering function and the using method thereof have the following beneficial effects:

1. according to the invention, through the deformation of the spring, the impact force between the grains and the grain receiving hopper can be buffered, so that the impact force on the grains is reduced, the probability of crushing the grains is reduced, and the use reliability of the device is improved;

2. the silica gel pad can also play a role in buffering, and the grains are in soft contact with the grain containing funnel through the silica gel pad, so that the impact force on the grains is reduced, and the probability of crushing the grains is further reduced.

Drawings

Fig. 1 is a schematic structural diagram of a grain winnowing device with a buffering function and a use method thereof according to a preferred embodiment of the invention;

FIG. 2 is a schematic view of the grain pre-screening mechanism of FIG. 1;

FIG. 3 is a schematic view of the soot handling mechanism shown in FIG. 1;

fig. 4 is a schematic structural view of the air separation mechanism shown in fig. 1;

fig. 5 is a schematic structural view of the grain receiving mechanism shown in fig. 4.

Reference numbers in the figures: 1. a grain pre-screening mechanism; 11. an electrically controlled door; 12. a rubber ring; 13. a rotating cylinder; 14. a feed hopper; 15. a pre-screening box; 16. a vibration motor; 17. an impurity collecting box; 18. a screen mesh; 19. a rubber ring; 2. a smoke dust treatment mechanism; 21. a gas-collecting channel; 22. a straight pipe; 23. a connecting pipe; 24. a water injection pipe; 25. an exhaust pipe; 26. a water tank; 3. supporting legs; 4. mounting a plate; 5. a winnowing mechanism; 51. a gas distribution plate; 52. a gas-guide tube; 53. an air pump; 54. an air tap; 55. a feed gate; 56. a baffle plate; 6. a winnowing box; 7. a grain receiving mechanism; 71. a corrugated rubber connecting ring; 72. a spring; 73. a silica gel pad; 74. a side panel; 75. a discharge pipe; 76. the grain receiving funnel.

Detailed Description

The invention is further described with reference to the following figures and embodiments.

Please refer to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5 in combination, wherein fig. 1 is a schematic structural diagram of a grain winnowing device with a buffering function and a use method thereof according to a preferred embodiment of the present invention; FIG. 2 is a schematic view of the grain pre-screening mechanism of FIG. 1; FIG. 3 is a schematic view of the soot handling mechanism shown in FIG. 1; fig. 4 is a schematic structural view of the air separation mechanism shown in fig. 1; fig. 5 is a schematic structural view of the grain receiving mechanism shown in fig. 4. The grain winnowing device with the buffering function and the use method thereof comprise the following steps: a mounting plate 4; the upper surface of the mounting plate 4 is fixedly connected with the winnowing box 6 through a bracket; the winnowing mechanism 5 is connected with the winnowing box 6; the grain receiving mechanism 7 is connected with the winnowing box 6; the smoke and dust processing mechanism 2 is connected with the air outlet of the winnowing box 6, and the smoke and dust processing mechanism 2 is also connected with the mounting plate 4; cereal is screening mechanism 1 in advance, cereal is screening mechanism 1 and winnowing box 6 are connected in advance.

In the specific implementation process, as shown in fig. 4 and 5, the grain receiving mechanism 7 includes a corrugated rubber connecting ring 71, a spring 72, a silica gel pad 73, a discharging pipe 75 and a grain receiving funnel 76, the inner bottom of the winnowing box 6 is provided with the grain receiving funnel 76 with an upper end opening, the upper end opening of the grain receiving funnel 76 is fixedly connected with the inner wall of the winnowing box 6 through the corrugated rubber connecting ring 71, the inner bottom wall of the grain receiving funnel 76 is fixedly connected with the silica gel pad 73, and the thickness of the silica gel pad 73 is not less than 1 cm; a discharge pipe 75 is connected to a discharge port at the lower end of the grain receiving funnel 76, and the discharge pipe 75 penetrates through a through hole at the bottom of the winnowing box 6; the inner bottom wall of the winnowing box 6 is connected with a plurality of springs 72, and the upper ends of the springs 72 are connected with the outer surface of a grain holding funnel 76.

Need to explain: when the device is used, grains after winnowing fall into the grain receiving hopper 76, and when the grains fall into the grain receiving hopper 76, the grains collide with the grain receiving hopper 76, at the moment, the spring 72 deforms, and the impact force between the grains and the grain receiving hopper 76 can be buffered through the deformation of the spring 72, so that the impact force on the grains is reduced, the probability of crushing the grains is reduced, and the use reliability of the device is improved; the silica gel pad 73 can also play a role in buffering, and grains are in soft contact with the grain receiving funnel 76 through the silica gel pad 73, so that the impact force on the grains is reduced, and the probability of crushing the grains is further reduced.

Referring to fig. 5, the grain receiving mechanism 7 further includes a side piece 74, a plurality of side pieces 74 uniformly distributed are integrally formed on an outer surface of the discharging pipe 75, and the side piece 74 is slidably connected to the winnowing box 6.

Need to explain: the side plates 74 play a limiting role, and the freedom degree of the grain containing and receiving funnel 76 is limited through the side plates 74, so that the grain containing and receiving funnel 76 can only move in the vertical direction, and the movement stability of the grain containing and receiving funnel 76 is improved.

Referring to fig. 1 and 4, winnowing mechanism 5 is including dividing air disk 51, air duct 52, air pump 53, air cock 54 and feed gate 55, the last surface sliding connection of winnowing box 6 has feed gate 55, and the surface of winnowing box 6 is connected with air pump 53, and the one end of air duct 52 is connected to the gas outlet of air pump 53, and the other end of air duct 52 is connected with and divides air disk 51, divides air disk 51 and air duct 52 face-to-back to install a plurality of air cocks 54, and air cock 54 runs through winnowing box 6 and sets up, and the air outlet slope of air cock 54 upwards sets up.

Need to explain: work through air pump 53 for air cock 54 is given vent to anger, and the air current that blows out through air cock 54 can carry out the selection by winnowing to cereal, and the air outlet slope of air cock 54 upwards sets up, makes air cock 54 blow out oblique ascending air current, and oblique ascending air current can provide ascending component force, thereby delays the speed that cereal descends, increases the time of cereal and air current contact, and then improves cereal selection by winnowing's effect.

Referring to fig. 4, the air separation mechanism 5 further includes a baffle plate 56, the air separation box 6 is fixedly connected with a plurality of baffle plates 56 arranged in a staggered manner, and the baffle plates 56 are arranged obliquely downwards.

Need to explain: the baffle plate 56 can guide the grains, so that the falling distance of the grains each time is reduced, and the probability of grain breakage is reduced; baffle 56 can also reduce the speed that cereal falls, increases cereal and the time of air current contact to further improve cereal air separation's effect, simultaneously, cereal and baffle 56 contact the back, because the collision, under the effect of baffle 56, can turn cereal, improve cereal air separation's effect.

Referring to fig. 1 and 3, the smoke treatment mechanism 2 includes a gas collecting hood 21, a straight pipe 22, a connecting pipe 23, a water injection pipe 24, an exhaust pipe 25 and a water tank 26, the water tank 26 is fixedly connected to the upper surface of the mounting plate 4, and the water injection pipe 24 and the exhaust pipe 25 are fixedly connected to the upper surface of the water tank 26, the interiors of which are communicated with each other; gas collecting channel 21 is installed to the gas outlet of winnowing box 6, and gas collecting channel 21 is connected with straight tube 22 through connecting pipe 23, and straight tube 22 runs through the upper surface setting of water tank 26, and the bottom of straight tube 22 is close to the interior diapire setting of water tank 26.

Need to explain: the gas in the winnowing box 6 can be introduced into the connecting pipe 23 through the gas collecting hood 21, and the gas flow is washed by the water in the water tank 26 under the liquid level entering the water tank 26 through the branch pipe 22, and the gas flow after washing is discharged through the exhaust pipe 25; the air flow is washed by water in the water tank 26, so that smoke in the air flow is effectively removed, the pollution to the surrounding environment is avoided, meanwhile, the working environment of operators is guaranteed, the probability that the operators suck the smoke is reduced, and the physical and mental health of the operators is facilitated.

Referring to fig. 3, the connecting tube 23 is disposed obliquely, and one end of the connecting tube 23 close to the gas collecting channel 21 is located below the other end thereof.

Need to explain: the slope of connecting pipe 23 sets up for even cereal that enters into in the connecting pipe 23 is difficult for entering into connecting pipe 23, under the effect of gravity, also can slide again in winnowing box 6, thereby avoid the waste of cereal, improve the reliability that the device used.

Referring to fig. 1 and 2, the grain pre-screening mechanism 1 includes an electric control door 11, a rubber ring 12, a rotary cylinder 13, a feeding funnel 14, a pre-screening box 15, a vibration motor 16, an impurity collecting box 17, a screen 18 and a rubber ring 19, the outer surface of the winnowing box 6 near the top thereof is fixedly connected with the impurity collecting box 17 with an opening at the upper end, the edge of the upper surface of the impurity collecting box 17 is fixedly connected with the rubber ring 19, the outer surface of the impurity collecting box 17 is fixedly connected with the rotary cylinder 13, the output end of the rotary cylinder 13 is fixedly connected with the pre-screening box 15 with an opening at the lower end, the pre-screening box 15 is positioned above the impurity collecting box 17, the screen 18 is fixedly connected in the pre-screening box 15, and the lower surface of the screen 18 is fixedly connected with the vibration motor 16; the last fixed surface of prescreening case 15 is connected with the feed hopper 14 rather than inside intercommunication, and prescreening case 15 and being close to the lateral wall of winnowing box 6 and having seted up the mounting groove, installs automatically controlled door 11 in the mounting groove, and the edge fixedly connected with rubber ring 12 of mounting groove surface.

The following description is required: grains to be winnowed are sent into a pre-screening box 15 through a feeding funnel 14, the grains are pre-screened through the work of a vibration motor 16, and impurities generated by pre-screening fall into an impurity collecting box 17;

it is also stated that: the rubber ring 19 can seal the gap between the impurity collecting box 17 and the pre-screening box 15, so that smoke dust is prevented from being generated during grain pre-screening, and the influence on the surrounding environment is further avoided;

it is also stated that: after the grains are pre-screened, the pre-screening box 15 is rotated through the rotary air cylinder 13, at the moment, the electric control door 11 is aligned with the feeding door 55, then the electric control door 11 and the feeding door 55 are opened, the pre-screened grains enter the winnowing box 6, and a gap between the electric control door 11 and the feeding door 55 can be sealed through the rubber ring 12, so that smoke dust is prevented from being generated when the winnowing box 6 feeds the grains;

it is also necessary to state: when carrying out the prescreening to cereal, can detach most impurity in the cereal, after the cereal prescreening, when carrying out the selection by winnowing again, cause the impurity reduction of interference to the selection by winnowing to improve the quality and the efficiency of cereal selection by winnowing.

Referring to fig. 1, support legs 3 are mounted at corners of the lower surface of the mounting plate 4.

Need to explain: the supporting legs 3 play a supporting role.

A grain winnowing device with a buffering function is used as follows:

a. grains are fed into a pre-screening box 15 through a feeding hopper 14, and the grains are pre-screened through the operation of a vibration motor 16;

b. after the pre-screening is finished, the pre-screening box 15 is rotated through the rotary air cylinder 13, and then the electric control door 11 and the feeding door 55 are opened, so that the pre-screened grains enter the winnowing box 6;

c. 2-3 minutes before the electric control door 11 and the feeding door 55 are opened, the air pump 53 is started to enable the air nozzle 54 to exhaust air, air current blown out by the air nozzle 54 is used for winnowing the pre-screened grains, and the grain winnowing quality is improved;

d. the grains after winnowing fall into the grain containing funnel 76, and the impact force between the grains and the grain containing funnel 76 can be buffered through the deformation of the spring 72, so that the impact force on the grains is reduced, the probability of crushing the grains is reduced, and the use reliability of the device is improved; the silica gel pad 73 can also play a role in buffering, so that the probability of crushing grains is further reduced;

e. after falling into the grain receiving funnel 76, the grains are discharged through the discharge pipe 75.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are included in the scope of the present invention.

Claims

1. A cereal wind selector with buffer function, its characterized in that includes:

a mounting plate (4);

the upper surface of the mounting plate (4) is fixedly connected with the winnowing box (6) through a bracket;

the winnowing mechanism (5), the winnowing mechanism (5) is connected with the winnowing box (6);

the grain receiving mechanism (7) is connected with the winnowing box (6), the grain receiving mechanism (7) comprises a corrugated rubber connecting ring (71), a spring (72), a silica gel pad (73), a discharge pipe (75) and a grain receiving funnel (76), the inner bottom of the winnowing box (6) is provided with the grain receiving funnel (76) with an upper end opening, the upper end opening of the grain receiving funnel (76) is fixedly connected with the inner wall of the winnowing box (6) through the corrugated rubber connecting ring (71), the inner bottom wall of the grain receiving funnel (76) is fixedly connected with the silica gel pad (73), and the thickness of the silica gel pad (73) is not less than 1 cm; a discharge pipe (75) is connected to a discharge port at the lower end of the grain receiving funnel (76), and the discharge pipe (75) penetrates through a through hole at the bottom of the winnowing box (6); the inner bottom wall of the winnowing box (6) is connected with a plurality of springs (72), and the upper ends of the springs (72) are connected with the outer surface of the grain receiving hopper (76);

the smoke dust treatment mechanism (2), the smoke dust treatment mechanism (2) is connected with an air outlet of the winnowing box (6), and the smoke dust treatment mechanism (2) is also connected with the mounting plate (4);

the grain pre-screening mechanism (1), the grain pre-screening mechanism (1) is connected with the winnowing box (6);

the grain pre-screening mechanism (1) comprises an electric control door (11), a rubber ring (12), a rotary cylinder (13), a feeding hopper (14), a pre-screening box (15), a vibration motor (16), an impurity collecting box (17), a screen (18) and a rubber ring (19), the outer surface of the winnowing box (6) close to the top thereof is fixedly connected with an impurity collecting box (17) with an opening at the upper end, the edge of the upper surface of the impurity collecting box (17) is fixedly connected with a rubber ring (19), and the outer surface of the impurity collecting box (17) is fixedly connected with a rotary cylinder (13), the output end of the rotary cylinder (13) is fixedly connected with a pre-screening box (15) with an opening at the lower end, the pre-screening box (15) is positioned above the impurity collecting box (17), a screen (18) is fixedly connected in the pre-screening box (15), and the lower surface of the screen (18) is fixedly connected with a vibration motor (16); the last fixed surface of prescreening case (15) is connected with rather than inside feed hopper (14) that communicate each other, and prescreening case (15) and being close to the lateral wall of winnowing box (6) and having seted up the mounting groove, installs automatically controlled door (11) in the mounting groove, and the edge fixedly connected with rubber ring (12) of mounting groove surface.

2. The grain winnowing device with the buffering function according to claim 1, characterized in that the grain receiving mechanism (7) further comprises a side piece (74), the outer surface of the discharging pipe (75) is integrally formed with a plurality of evenly distributed side pieces (74), and the side pieces (74) are slidably connected with the winnowing box (6).

3. The grain winnowing device with the buffering function according to claim 1, characterized in that the winnowing mechanism (5) comprises an air distribution disc (51), an air duct (52), an air pump (53), an air tap (54) and a feeding gate (55), the feeding gate (55) is slidably connected to the upper surface of the winnowing box (6), the air pump (53) is connected to the outer surface of the winnowing box (6), one end of the air duct (52) is connected to an air outlet of the air pump (53), the air distribution disc (51) is connected to the other end of the air duct (52), a plurality of air taps (54) are arranged on the dorsad surfaces of the air distribution disc (51) and the air duct (52), the air taps (54) are arranged to penetrate through the winnowing box (6), and an air outlet of the air taps (54) is obliquely and upwardly arranged.

4. The grain winnowing device with the buffering function according to claim 1, characterized in that the winnowing mechanism (5) further comprises a baffle plate (56), a staggered baffle plate (56) is fixedly connected in the winnowing box (6), and the baffle plate (56) is arranged obliquely downwards.

5. The grain winnowing device with the buffering function according to claim 1, characterized in that the smoke dust treatment mechanism (2) comprises a gas collecting hood (21), a straight pipe (22), a connecting pipe (23), a water injection pipe (24), an exhaust pipe (25) and a water tank (26), the upper surface of the mounting plate (4) is fixedly connected with the water tank (26), and the upper surface of the water tank (26) is fixedly connected with the water injection pipe (24) and the exhaust pipe (25) which are mutually communicated with the inside of the water tank; gas collecting channel (21) are installed to the gas outlet of winnowing box (6), and gas collecting channel (21) are connected with straight tube (22) through connecting pipe (23), and the upper surface setting that water tank (26) were run through in straight tube (22), and the bottom of straight tube (22) is close to the interior diapire setting of water tank (26).

6. The grain winnowing device with the buffering function according to claim 5, characterized in that the connecting pipe (23) is arranged obliquely, and one end of the connecting pipe (23) close to the gas collecting hood (21) is located below the other end thereof.

7. The grain winnowing device with the buffering function according to claim 1, characterized in that supporting legs (3) are installed at the corners of the lower surface of the mounting plate (4).

8. The grain winnowing device with the buffering function according to any one of claims 1 to 7, characterized in that the use method thereof is as follows:

a. grains are fed into a pre-screening box (15) through a feeding hopper (14), and the grains are pre-screened through the work of a vibration motor (16);

b. after the pre-screening is finished, the pre-screening box (15) is rotated through the rotary air cylinder (13), and then the electric control door (11) and the feeding door (55) are opened, so that the pre-screened grains enter the winnowing box (6);

c. 2-3 minutes before the electric control door (11) and the feeding door (55) are opened, the air pump (53) is started to enable the air nozzle (54) to give out air, air flow blown out by the air nozzle (54) is used for winnowing the pre-screened grains, and the grain winnowing quality is improved;

d. the grains after winnowing fall into the grain receiving funnel (76), and the impact force between the grains and the grain receiving funnel (76) can be buffered through the deformation of the spring (72), so that the impact force on the grains is reduced, the probability of crushing the grains is reduced, and the use reliability of the device is improved; the silica gel pad (73) can also play a role in buffering, so that the probability of breakage of grains is further reduced;

e. after falling into the grain receiving funnel (76), the grains are discharged through the discharge pipe (75).