CN114101069B

CN114101069B - Flour processing technology

Info

Publication number: CN114101069B
Application number: CN202111343632.4A
Authority: CN
Inventors: 樊增武
Original assignee: Shaanxi Shanfu Weinan Flour Industry Co ltd
Current assignee: Shaanxi Shanfu Weinan Flour Industry Co ltd
Priority date: 2021-11-13
Filing date: 2021-11-13
Publication date: 2023-01-31
Anticipated expiration: 2041-11-13
Also published as: CN114101069A

Abstract

The application belongs to the field of flour processing, and relates to a flour processing technology, which has the technical scheme that the method comprises the following steps of S1, removing stones and soil blocks with the grain size larger than that of wheat in wheat; s2, removing stones and soil blocks with the grain size equivalent to that of the wheat in the wheat; and S3, removing stones and soil blocks in the wheat, wherein the grain diameter of the stones is smaller than that of the wheat. The method has the advantages that the method for processing the stones and the soil blocks step by step is more specific, and compared with a traditional one-time removing method, the stones and the soil blocks in the wheat can be processed more cleanly, and the wheat impurity removing effect is better.

Description

Flour processing technology

Technical Field

The application relates to the field of flour processing, in particular to a flour processing technology.

Background

The flour is powder processed from wheat, and the flour is finally classified into special flour, first-class flour, second-class flour and other grades due to different processing technologies and different qualities of the wheat, so that the flour can be used for making different foods.

The existing flour processing steps are mainly divided into three steps: 1. removing impurities from wheat, wherein the impurities from the wheat need to pass through a combined cleaning sieve, a stone remover, a wheat thresher and a color selector respectively, wherein the combined cleaning sieve is used for removing grass seeds, straws and the like, the stone remover is used for removing stones, soil blocks and the like with larger mass, the wheat thresher is used for removing impurities on the surface of the wheat, and the color selector is used for removing metamorphic wheat; 2. milling, moisture conditioning, separating wheat bran, endosperm and wheat germ, and grinding and screening endosperm; 3. and (6) bagging the flour.

In view of the above related technologies, the inventor believes that in the wheat impurity removal process, stone removal steps can only remove stones and soil blocks with large mass, and the defect of poor impurity removal effect on wheat exists.

SUMMERY OF THE UTILITY MODEL

In order to improve the impurity removal effect of wheat, the application provides a flour processing technology.

The application provides a flour processing technology, which comprises the following steps:

s1, removing stones and soil blocks with the grain size larger than that of wheat in the wheat;

s2, removing stones and soil blocks with the grain size equivalent to that of the wheat in the wheat;

and S3, removing stones and soil blocks in the wheat, wherein the grain diameter of the stones is smaller than that of the wheat.

By adopting the technical scheme, the stones and the soil blocks with the particle size larger than that of the wheat are firstly screened, then the stones and the soil blocks with the particle size equivalent to that of the wheat are removed, and finally the stones and the soil blocks with the particle size smaller than that of the wheat are removed.

Optionally, in step S1, when removing stones and soil lumps, impurities lighter than wheat in weight are removed together.

By adopting the technical scheme, when stones and soil blocks with particle sizes larger than that of wheat are removed, impurities with lighter weight are removed together, the use of other large-scale machines is avoided, two functions are realized in one step, and the wheat harvester is economical and practical.

Optionally, in step S3, when removing the stones and the clods, a water washing method is adopted, and other water-soluble impurities are removed at the same time.

By adopting the technical scheme, when stones and soil blocks are removed, the water washing method is adopted, so that the falling of the stones and the soil blocks can be accelerated, other impurities on the surface of the wheat can be washed, multiple functions can be realized in one step, and the wheat cleaning machine is economical and practical.

Optionally, use large granule sieve subassembly to carry out cleaing away of stone and clod in step S1, large granule sieve subassembly includes large granule sieve case, large granule screen cloth, a vibrating motor and fan, has seted up the large granule export on the large granule sieve case, and large granule screen cloth, a vibrating motor all are connected with large granule sieve case, and the fan is connected with large granule sieve case to be used for blowing to large granule sieve incasement.

By adopting the technical scheme, the first vibration motor drives the large-particle screen to vibrate when vibrating, the wheat with smaller particle size falls down while the large-particle screen vibrates, and the stones and soil blocks with larger particle size slide down on the large-particle screen; meanwhile, the blower blows away impurities with lighter mass in the wheat, impurities are removed from the wheat preliminarily, and the impurities of various substances are removed in one step.

Optionally, in the step S2, the medium particle sieve device is used for removing stones and soil blocks, the medium particle sieve device includes a medium particle sieve box and a medium particle sieve assembly, the medium particle sieve assembly includes an inclined wheat falling plate and an inclined stone falling plate, both the wheat falling plate and the stone falling plate are connected to the medium particle sieve box, the wheat falling plate is connected to the stone falling plate, the inclination directions of the wheat falling plate and the stone falling plate are opposite, and the wheat falling plate is connected to a driving assembly for driving the wheat falling plate to vibrate.

Through adopting above-mentioned technical scheme, well granule sieve subassembly sieves except that stone and the soil block that equals with the wheat particle diameter, the wheat that the quality is lighter because inertia is less, when falling the vibration of wheat board, the wheat can be followed the direction of vibration and dropped, and the weight of stone and soil block is heavier, and inertia is less, and when falling the vibration of wheat board, the stone tends to drop to fall one side that the wheat board is close to the slabstone, separates stone, soil block and the wheat that the particle diameter is equivalent.

Optionally, the drive assembly includes first cam, second cam, follows the driving wheel, action wheel and drive belt, slabstone one end butt is kept away from with the wheat falling board to first cam, and first cam is connected with following the driving wheel, follow driving wheel, action wheel all are connected with well granule sieve case, the second cam is close to slabstone one end butt with the wheat falling board, and the second cam is connected with the action wheel, the axle center of second cam is less than the axle center of first cam to the distance of wheat falling board to the axle center of wheat falling board, follow driving wheel, action wheel all are connected with the drive belt transmission.

Through adopting above-mentioned technical scheme, drive assembly's setting for when action wheel and driven wheel drive first cam and second cam rotation, the range of first cam drive wheat falling plate vibration is greater than the range of second cam drive wheat falling plate vibration, and then wheat falling plate keeps away from wheat falling plate one end vibration range big, and the vibration orbit is the arc, and the wheat follows the vibration of wheat falling plate and tends to remove to wheat falling plate one end gradually, and stone and soil block drop from wheat falling plate one end.

Optionally, a first spring is connected between the wheat falling plate and the medium particle sieve box.

Through adopting above-mentioned technical scheme, the setting of first spring when having increased wheat board vibration amplitude for wheat board that falls can not take place mechanical collision with other positions, has protected wheat board that falls, has increased screening efficiency.

Optionally, the medium particle screen assemblies are arranged in multiple groups; a uniform plate is connected between the medium particle sieve box and the large particle sieve box, and a second vibrating motor is connected to the uniform plate; the second spring is connected between the uniform plate and the medium particle sieve box, and the uniform plate is used for enabling the wheat quantity falling into the multiple groups of medium particle sieve assemblies to be uniform.

Through adopting above-mentioned technical scheme, the setting of equalizer plate for on the wheat that falls down from large granule screen cloth vibrates the even back and falls the well granule sieve subassembly of difference on the equalizer plate, increase the efficiency of cleaing away of stone and soil block.

Optionally, in the step S3, the small particle sieve assembly is used for removing stones and soil blocks, the small particle sieve assembly comprises a small particle sieve box, a small particle sieve screen and a third vibrating motor, the small particle sieve box is connected with a water injection pipe, the small particle sieve screen is arranged in an inclined manner and is connected with the small particle sieve box, and the third vibrating motor is connected with the small particle sieve box.

By adopting the technical scheme, the vibration of the third vibration motor drives the small particle screen to vibrate, when water is injected into the small particle screen box, stones fall below the wheat along with the vibration, and the wheat is cleaned by the water in the same vibration process; the small particle screen separates the wheat above the small particle screen, the stones fall below the small particle screen, and the small particle stones and the soil are removed.

Optionally, in step S3, water is first injected into the small particle sieve box, the third vibration motor is turned on to vibrate, after the vibration is performed for a period of time, the water in the small particle sieve box is discharged, the water level reaches the lower part of the small particle sieve net, the vibration is continued, and the wheat is vibrated out of the small particle sieve box.

By adopting the technical scheme, firstly, the wheat and impurities are vibrated in water, and stones smaller than the particle size of the wheat fall below the small particle sieve box while the wheat is cleaned; after vibrating for a period of time, the water in the small particle sieve box is cleaned, when the vibration continues, stones with smaller particle sizes continue to fall, and wheat slides out of the small particle sieve box along the inclined small particle sieve.

In summary, the present application includes at least one of the following beneficial technical effects:

1. compared with the traditional one-time removing method, the more specific method for treating the stones and the soil blocks step by step can treat the stones and the soil blocks in the wheat cleaner and has better impurity removing effect on the wheat;

2. in the step S1, when stones and soil blocks with particle sizes larger than that of wheat are removed, impurities with lighter weight are removed together, the use of other large machines is avoided, two functions are realized simultaneously in one step, and the method is economical and practical;

3. in the step S3, when stones and soil blocks are removed, a water washing method is adopted, so that the stones and the soil blocks can fall, other impurities on the surface of the wheat can be washed away, multiple functions can be realized in one step, and the method is economical and practical.

Drawings

FIG. 1 is a schematic view for illustrating the structure of the present embodiment;

FIG. 2 is a schematic view for showing the internal structure of the processing apparatus of the present embodiment;

FIG. 3 is a schematic diagram of a structure intended to show a large particle screen assembly;

FIG. 4 is a schematic diagram of a particle screen assembly intended to show the structure of the middle screen assembly;

FIG. 5 is a schematic diagram intended to show the structure of the driving assembly;

figure 6 is a schematic diagram intended to show the construction of a small particle screen assembly.

Description of reference numerals: 1. a large particle screen assembly; 11. a large particle sieve box; 111. a large particle outlet; 112. wheat import; 12. a large-particle screen; 13. a first vibration motor; 14. a fan; 2. a medium particle screening device; 21. a medium particle screening box; 211. a medium particle outlet; 22. a medium particle screen assembly; 221. wheat falling plate; 222. falling into a stone plate; 223. a wheat falling extension plate; 224. a rockfall extension plate; 23. a first spring; 3. a drive assembly; 31. a first cam; 32. a second cam; 33. a driven wheel; 34. a driving wheel; 35. a transmission belt; 4. a homogenizing plate; 41. a second vibration motor; 42. a second spring; 43. a wheat falling cavity; 431. wheat dropping; 5. a small particle screen assembly; 51. a small particle sieve box; 511. a water injection pipe; 512. a small particle outlet; 513. a stone outlet; 52. a small particle screen; 53. a third vibration motor; 6. a connecting spring; 7. and connecting the flexible board.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses a flour processing technology. Referring to fig. 1, the flour processing technology is characterized in that impurity removal of flour is divided into three steps, stones and soil blocks are sequentially removed according to particle sizes of the stones and the soil blocks, equipment used for impurity removal comprises a large particle sieve assembly 1, a medium particle sieve assembly 2 and a small particle sieve assembly 5, the large particle sieve assembly 1 is communicated with the medium particle sieve assembly 2, the medium particle sieve assembly 2 is communicated with the small particle sieve assembly 5, and the flour sequentially passes through the large particle sieve assembly 1, the medium particle sieve assembly 2 and the small particle sieve assembly 5 to remove impurities step by step.

Referring to fig. 2 and 3, the large particle sieve assembly 1 includes a large particle sieve box 11, a large particle sieve 12, a first vibrating motor 13 and a fan 14, the large particle sieve box 11 is a rectangular box body, the large particle sieve box 11 is provided with a wheat inlet 112 for wheat to enter the large particle sieve box 11 and a large particle outlet 111 for removing stones, the wheat inlet 112 is arranged on the top surface of the large particle sieve box 11, and the large particle outlet 111 is arranged on the side wall of the large particle sieve box 11; the first vibrating motor 13 is fixedly connected with the large-particle sieve box 11 by bolts; the fan 14 is fixedly connected to the side wall of the large-particle sieve box 11 by using bolts, and an air outlet of the fan 14 is welded and fixed with and communicated with the side wall of the large-particle sieve box 11 on the opposite side of the large-particle outlet 111; the large particle screen 12 is obliquely arranged in the large particle screen box 11, the oblique direction of the large particle screen 12 is close to one side of the large particle outlet 111, the higher end of the large particle screen 12 is positioned below the air outlet of the fan 14, and the lower end of the large particle screen 12 is flush with the bottom of the large particle outlet 111; the large particle screen 12 has a pore size slightly larger than the wheat particle size.

Referring to fig. 4, the medium particle sieve device 2 includes a medium particle sieve box 21 and a medium particle sieve assembly 22, the medium particle sieve box 21 is a rectangular box body, a connecting soft board 7 and a connecting spring 6 are arranged between the medium particle sieve box 21 and the large particle sieve box 11, the top end of the connecting soft board 7 is fixedly bonded with the large particle sieve box 11, the bottom end of the connecting soft board 7 is fixedly bonded with the top end of the medium particle sieve box 21, and the connecting soft board 7 connects the large particle sieve box 11 with the medium particle sieve box 21; connecting spring 6 evenly is provided with a plurality ofly, and a plurality of connecting spring 6 will be connected the soft board 7 and enclose and establish, and connecting spring 6 one end and 11 bottom welded fastening of large granule sieve case, the other end and well granule sieve case 21 top welded fastening, well granule sieve case 21 lateral wall has been seted up well granule export 211.

Referring to fig. 4, a uniform plate 4 is arranged in a medium particle sieve box 21, the longitudinal section of the uniform plate 4 is in a plurality of V shapes which are connected in sequence, and the aperture of the uniform plate 4 is the same as that of the large particle sieve 12; the two sides of the uniform plate 4 are fixedly connected with a second vibrating motor 41 by bolts, the uniform plate 4 is used as a top wall, the side wall of the medium particle sieve box 21 is used as a side wall, and the top wall and the side wall are enclosed into a wheat dropping cavity 43 together, a plurality of second springs 42 are uniformly arranged between the uniform plate 4 and the wheat dropping cavity 43, one end of each second spring 42 is fixedly welded with the uniform plate 4, and the other end of each second spring is fixedly welded with the bottom surface of the wheat dropping cavity 43; two wheat falling openings 431 are formed in the bottom surface of the wheat falling cavity 43, and the positions of the wheat falling openings 431 are the lowest points of the wheat falling cavity 43.

Referring to fig. 4, the medium particle sieve assemblies 22 are arranged in two groups, the two groups of medium particle sieve assemblies 22 are both located below the wheat falling cavity 43, and the positions of the medium particle sieve assemblies 22 and the wheat falling port 431 are arranged correspondingly. The medium particle sieve component 22 comprises an inclined wheat falling plate 221 and an inclined stone falling plate 222, the wheat falling plate 221 and the stone falling plate 222 are both in a rectangular plate structure, and two sides of the wheat falling plate 221 and the stone falling plate 222 are both bent upwards to form blocking edges; the inclination directions of the wheat falling plate 221 and the wheat falling plate 222 are opposite, the higher end of the wheat falling plate 221 is fixedly connected with the higher end of the wheat falling plate 222 and integrally formed, and the joint of the wheat falling plate 221 and the wheat falling plate 222 is just below the wheat falling port 431; one side of one of the wheat dropping plates 221, which is far away from the wheat dropping plate 222, is fixedly welded with a wheat dropping extension plate 223, the wheat dropping extension plate 223 extends to the bottom of the other wheat dropping plate 221, and a gap for wheat to fall into the small-particle sieve box 51 is reserved between the extension ends of the wheat dropping extension plate 223 and the wheat dropping plate 221 and the side wall of the medium-particle sieve box 21; one side of one of the falling stone plates 222, which is opposite to the falling wheat plate 221, is fixedly welded with a falling stone extension plate 224, the falling stone extension plate 224 extends to the bottom of the other falling stone plate 222, and the falling stone plates 222 and the falling stone extension plates 224 with the same outlet direction extend to the medium particle outlet 211 together; both sides of the wheat falling extension plate 223 and the rock falling extension plate 224 are bent upwards to form blocking edges.

Referring to fig. 2 and 5, a plurality of first springs 23 are fixedly welded to the bottom surface of the wheat falling plate 221, and one ends of the first springs 23 far away from the wheat falling plate 221 are fixedly welded to the middle particle sieve box 21; the wheat falling plate 221 is connected with a driving assembly 3 for driving the wheat falling plate 221 and the rock falling plate 222 to shake. The driving component 3 comprises a first cam 31, a second cam 32, a driven wheel 33, a driving wheel 34 and a transmission belt 35, the first cam 31 is positioned below one end of the wheat falling plate 221 far away from the wheat falling plate 222, the first cam 31 is abutted against the wheat falling plate 221, the axis of the first cam 31 is in key connection with the axis of the driven wheel 33, and the axis of the driven wheel 33 is in rotary connection with the medium particle sieve box 21; the second cam 32 is positioned on one side of the wheat dropping plate 221, which is close to the wheat dropping plate 222, the second cam 32 is abutted against the wheat dropping plate 221, the axis of the second cam 32 is in key connection with the axis of the driving wheel 34, the axis of the driving wheel 34 is in key connection with the motor, the motor is fixedly connected with the medium particle sieve box 21 through bolts, and the maximum distance from the axis of the first cam 31 to the wheat dropping plate 221 is greater than the maximum distance from the axis of the second cam 32 to the wheat dropping plate 221; the driving wheel 34 and the driven wheel 33 are in transmission connection with a transmission belt 35.

Referring to fig. 6, the small particle sieve assembly 5 includes a small particle sieve box 51, a small particle sieve 52 and a third vibration motor 53, the small particle sieve box 51 is a rectangular box body, the small particle sieve box 51 is communicated with the medium particle sieve box 21, and the connection mode of the small particle sieve box 51 and the medium particle sieve box 21 is the same as that of the medium particle sieve box 21 and the large particle sieve box 11. The small particle sieve box 51 is provided with a small particle outlet 512 and a stone outlet 513, and the small particle sieve box 51 is hinged with a cover for covering the small particle outlet 512 and the stone outlet 513; a water injection pipe 511 is welded and fixed on the side wall of the small particle sieve box 51, and the water injection pipe 511 is communicated with the small particle sieve box 51.

Referring to fig. 2 and 6, the small particle screen 52 is obliquely arranged in the small particle screen box 51, the small particle screen 52 is welded and fixed with the small particle screen box 51, the higher end of the small particle screen 52 is positioned below the water injection pipe 511, and the lower end of the small particle screen 52 is flush with the bottom of the small particle outlet 512; the pore size on the small particle screen 52 is smaller than that of wheat; the stone outlet 513 is located below the small particle screen 52. The third vibration motor 53 is fixedly connected with the small particle sieve box 51 through bolts.

A flour processing technology comprises the following steps:

step S1: pouring wheat into the large-particle sieve box 11 from a wheat inlet 112, and blowing the wheat into the medium-particle sieve box 21 from the large-particle sieve 12 under the vibration of the first vibration motor 13 and the blowing of the fan 14, wherein stones and soil blocks doped in the wheat and having a particle size larger than that of the wheat slide out of the large-particle sieve box 11 from the large-particle outlet 111 along the large-particle sieve 12, and lighter wheat husks, straws and the like are blown out along the large-particle outlet 111;

step S2: wheat falling into the medium particle sieve box 21 firstly falls onto the uniform plate 4, the uniform plate 4 is vibrated by the second vibration motor 41, the wheat is uniformly laid on the uniform plate 4, the uniform plate 4 is not easy to deform due to the shape design of the uniform plate 4, the wheat falls into the wheat falling cavity 43 from the uniform plate 4 and falls into the wheat falling cavity 43 from the wheat falling cavity 43 along the wheat falling port 431 to a position between the wheat falling plate 221 and the wheat falling plate 222, the wheat falling plate 221 is driven by the second cam 32 and the first cam 31 to shake in a fan-shaped track, the wheat with light weight slides down along the wheat falling plate 221, stones and soil blocks with relatively heavy weight slide down along the wheat falling plate 222, and the stones and soil blocks falling from the other wheat falling plate 222 are converged at the medium particle outlet 211 along the prolonged falling plate 224 and fall out of the medium particle sieve box 21; the wheat which slides down from the other wheat falling plate 221 is collected together along the wheat falling extension plate 223 and falls into the small particle sieve box 51;

and S3, injecting water into the small particle sieve box 51 through the water injection pipe 511, vibrating and washing the wheat falling into the small particle sieve box 51 and impurities smaller than the particle size of the wheat in the small particle sieve box 51 together, gradually dropping the stone with heavier mass below the small particle sieve 52, gradually washing and taking away other impurities dissolved in water by the water, enabling dirty water and the stone to flow out together, repeatedly washing and vibrating, and finally enabling the wheat falling from the small particle outlet 512 to be cleaner.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The flour processing technology is characterized by comprising the following steps:

s3, removing stones and soil blocks in the wheat, wherein the grain diameter of the stones is smaller than that of the wheat;

in the step S2, the medium particle sieve device (2) is used for removing stones and soil blocks, the medium particle sieve device (2) comprises a medium particle sieve box (21) and a medium particle sieve assembly (22), the medium particle sieve assembly (22) comprises an inclined wheat falling plate (221) and an inclined stone falling plate (222), the wheat falling plate (221) and the stone falling plate (222) are both connected with the medium particle sieve box (21), the wheat falling plate (221) is connected with the stone falling plate (222), the inclination directions of the wheat falling plate (221) and the stone falling plate (222) are opposite, and the wheat falling plate (221) is connected with a driving assembly (3) for driving the wheat falling plate (221) to vibrate; the driving assembly (3) comprises a first cam (31), a second cam (32), a driven wheel (33), a driving wheel (34) and a transmission belt (35), the first cam (31) and the wheat dropping plate (221) are far away from one end of the wheat dropping plate (222) to be abutted, the first cam (31) is connected with the driven wheel (33), the driven wheel (33) and the driving wheel (34) are both connected with the medium particle sieve box (21), the second cam (32) and one end, close to the wheat dropping plate (222), of the wheat dropping plate (221) to be abutted are connected with the second cam (32) and the driving wheel (34), the distance from the axis of the second cam (32) to the wheat dropping plate (221) is smaller than the distance from the axis of the first cam (31) to the wheat dropping plate (221), and the driven wheel (33) and the driving wheel (34) are both in transmission connection with the transmission belt (35); the medium particle screen assemblies (22) are arranged into a plurality of groups; a uniform plate (4) is connected between the medium particle sieve box (21) and the large particle sieve box (11), the longitudinal section of the uniform plate (4) is in a plurality of V shapes which are sequentially connected, the aperture on the uniform plate (4) is the same as that of the large particle screen (12), and a second vibrating motor (41) is connected on the uniform plate (4); a second spring (42) is connected between the uniform plate (4) and the medium particle sieve box (21), and the uniform plate (4) is used for enabling the wheat falling into the multiple groups of medium particle sieve components (22) to be uniform in amount.

2. A flour processing process according to claim 1, wherein: in the step S1, when removing stones and clods, impurities lighter than wheat in weight are removed together.

3. A flour processing process according to claim 1, wherein: in the step S3, when stones and soil blocks are removed, a water washing method is adopted, and other water-soluble impurities are removed.

4. A flour processing process according to claim 1, wherein: use large granule sieve subassembly (1) to carry out cleaing away of stone and soil block in step S1, large granule sieve subassembly (1) is including large granule sieve case (11), large granule screen cloth (12), first vibrating motor (13) and fan (14), large granule export (111) have been seted up on large granule sieve case (11), large granule screen cloth (12), first vibrating motor (13) all are connected with large granule sieve case (11), fan (14) are connected with large granule sieve case (11) to blow in being used for to large granule sieve case (11).

5. A flour processing process according to claim 1, wherein: a first spring (23) is connected between the wheat falling plate (221) and the medium particle sieve box (21).

6. A flour processing process according to claim 1, wherein: and step S3, the small particle sieve component (5) is used for removing stones and soil blocks, the small particle sieve component (5) comprises a small particle sieve box (51), a small particle sieve (52) and a third vibrating motor (53), a water injection pipe (511) is connected to the small particle sieve box (51), the small particle sieve (52) is obliquely arranged and is connected with the small particle sieve box (51), and the third vibrating motor (53) is connected with the small particle sieve box (51).

7. A flour processing process according to claim 3, wherein: in the step S3, water is firstly injected into the small particle sieve box (51), the third vibrating motor (53) is started to vibrate, after the water is vibrated for a period of time, the water in the small particle sieve box (51) is discharged, the water level reaches the position below the small particle sieve net (52), the vibration is continued, and the wheat is vibrated out of the small particle sieve box (51).