CN212018188U - A kind of grain winnowing vibrating screen - Google Patents

Abstract

The utility model relates to a grain wind selects shale shaker, the effectual problem of having solved current shale shaker single structure, function singleness, vibratory screening efficiency low of chassis, the chassis is installed the vibratory screen mechanism that can rock on, installs feed mechanism in the vibratory screen mechanism, its characterized in that, install the magnetic plate in the vibratory screen mechanism, install negative pressure mechanism in the vibratory screen mechanism, the utility model discloses improve on current shale shaker basis, simple structure, improve convenience, easy maintenance, improved screening efficiency, possessed very strong practicality.

Description

A kind of grain winnowing vibrating screen

technical field

The utility model relates to the technical field of grain machinery, in particular to a grain vibrating screen.

Background technique

Grain should be screened when it is harvested for storage or production and processing, because there are many impurities in the process of grain harvesting, operation, storage and processing, such as grain skin, dust, gravel, iron filings, leaves, wooden sticks And so on, so it is necessary to screen the grain before processing.

In the initial period, the tool for screening the grain was the dustpan. By shaking the dustpan with the arms, the grain and the impurities were separated due to the different densities of the grain and the impurities.

With the development of society, there are already mature grain screening machines. There are two more common ones. One is the vibrating screen, which screens the grain by the vibration of the vibrating screen driven by the motor. , The impurity is blown by the fan, so that the grain and the impurity are separated.

The above two types of vibrating screens have a single structure and a single function, and the vibration screening efficiency is low, requiring multiple screenings.

On this basis, the utility model improves the existing vibrating screen, and proposes a new vibrating screen for grain wind separation.

Utility model content

In view of the above situation, in order to overcome the defects of the prior art, the present utility model provides a grain vibrating screen, which effectively solves the problems of single structure, single function and low vibration screening efficiency of the existing vibrating screen.

A vibrating screen for grain selection includes a bottom frame, a vibrating screen mechanism capable of shaking is installed on the bottom frame, and a feeding mechanism is installed on the vibrating screen mechanism, characterized in that a magnetic plate is installed on the vibrating screen mechanism, so A negative pressure mechanism is installed on the vibrating screen mechanism.

Preferably, the bottom frame includes two front brackets and two rear brackets, the rear brackets are higher than the front brackets, so that the vibrating screen mechanism is inclined downward from left to right, and the upper ends of the front brackets and the rear brackets are installed with inclined , with reinforcement bars installed between the two front brackets and the two rear brackets.

Preferably, the vibrating screen mechanism includes an inclined screening shell, the screening shell and the beam have the same inclination angle, an upper screen and a lower screen are installed in the screening shell, and the filter holes of the upper screen are larger than those of the lower screen. .

Preferably, four upper cylinders are installed on the inner side wall of the beam, four lower cylinders corresponding to the upper cylinders are installed on both sides of the screening shell, and a rotating handle is rotatably connected between the upper cylinder and the lower cylinder. A spring is connected between the front end of the screening shell and the reinforcing rod.

Preferably, an inclined upper discharge plate is installed at the front end of the upper screen, an upper discharge port is installed at the upper discharge plate, an inclined lower discharge plate is installed at the front end of the lower screen, and the lower discharge plate is installed There is a lower discharge port, the upper discharge plate and the lower discharge plate are in a cross-inclined state, the upper discharge port and the lower discharge port are placed on both sides of the screening shell, and the front end of the bottom plate of the screening shell is provided with a bottom discharge mouth.

Preferably, the feeding mechanism includes a feeding shell placed at the rear end of the beam, the top of the feeding shell is open, the front end of the feeding shell is provided with a feeding port, and an adjusting plate is installed at the feeding port.

Preferably, the negative pressure mechanism includes a detachable closure cover placed on the screening shell, an upper ventilation hole is opened on the side wall of the closure cover, and the upper ventilation hole is connected with an upper exhaust air placed on the ground through an upper exhaust air bag. An upper exhaust fan is installed at the upper exhaust port, a middle air hole is opened on the side wall of the screening shell at the lower screen, and the middle air hole is connected with a middle air outlet placed on the ground through a middle air exhaust bag. A middle exhaust fan is installed at the middle exhaust port, and a lower ventilation hole is opened on the side wall of the screening shell at the bottom plate of the screening shell. A lower exhaust fan is installed at the air port, the bottom plate of the screening shell is a dense net, and a plurality of upward blowing fans are fixed under the dense net.

Preferably, the magnetic plate is fixed on the upper screen, the lower screen, and the bottom plate, and a magnetic plate is installed on the upper discharge port, the lower discharge port, and the bottom discharge port.

Preferably, it also includes a drive motor, the drive motor is connected with a disc through a rotating shaft, an eccentric column is eccentrically fixed on the disc, a vibration shaft is installed on the rear wall of the screening shell, and the eccentric column and the vibration shaft are connected by a rotating arm, The rotating shaft is fixed on the reinforcement rod through a bearing seat, a first pulley is sleeved on the rotating shaft, the first pulley is connected with a second pulley through a belt, and the second pulley is coaxially connected with a first bevel gear, the first bevel gear A second bevel gear is engaged, a third pulley is coaxially connected to the second bevel gear, a fourth pulley is connected to the third pulley via a belt, a blowing fan is respectively connected to the third pulley and the fourth pulley, and the rotating shaft is also sleeved A fifth pulley is provided, the fifth pulley is connected to a sixth pulley via a belt, the sixth pulley is coaxially connected to a first sprocket, the first sprocket is placed in parallel with a second sprocket and a third sprocket, and the first sprocket , The second sprocket and the third sprocket are connected by a chain, and the first sprocket, the second sprocket and the third sprocket are respectively connected with an upper exhaust fan, a middle exhaust fan and a lower exhaust fan.

Preferably, the side walls of the screening shell are provided with elongated holes corresponding to the upper screening net, the lower screening net and the bottom plate of the screening shell, and a moving rod transversely penetrating the screening shell is slidably installed in the elongated holes, and a moving rod is installed below the moving rod. The close-fitting bristles, the rear end of the moving rod is equipped with a telescopic rod that penetrates the screening shell.

Compared with the prior art, the utility model has the following technical effects:

1. Multi-stage screening of grain is carried out through the upper screen, the lower screen and the screen bottom plate, so that the separation of grain and impurities is cleaner and the screening efficiency is higher.

2. Through the adsorption of iron filings by the magnetic plate, it is used to remove iron filings impurities in the grain.

3. The light impurities such as dust and grain skin generated by the vibration in the screening shell are adsorbed by negative pressure through the exhaust fan, so as to remove the light impurities in the grain.

4. The inside of the screening shell is blown by the blowing fan, and the negative pressure adsorption of the exhaust fan is used to speed up the removal of impurities in the grain by the negative pressure.

5. The upper screen, the lower screen and the bottom plate of the screen shell are cleaned by the moving rod and the bristles, which is convenient for cleaning the inside of the screen shell.

6. Using one drive motor can drive the vibration of the screening shell, the start of the exhaust fan and the blowing fan at the same time, which saves electricity and is easy to operate.

7. The utility model is improved on the basis of the existing vibrating screen, the structure is simple, the improvement is convenient, the maintenance is convenient, the screening efficiency is improved, and the utility model has strong practicability.

Description of drawings

Figure 1 is a schematic perspective view of the utility model.

FIG. 2 is a schematic diagram of the front view of the utility model.

FIG. 3 is a schematic diagram of the left side view of the utility model.

FIG. 4 is a schematic plan view of the utility model.

5 is a schematic diagram of a cross-sectional view of the upper screen (lower screen) of the present invention.

FIG. 6 is a schematic diagram of the moving rod and the bristles of the utility model.

7 is a schematic diagram of the drive connection of the vibrating screen mechanism and the negative pressure mechanism of the present invention.

1: Bottom frame; 2: Shaker mechanism; 3: Feeding mechanism; 4: Magnetic plate; 5: Front bracket; 6: Rear bracket; 7: Beam; 8: Reinforcement rod; 9: Screening shell; 10: Upper screening Net; 11: Lower screen; 12: Upper cylinder; 13: Lower cylinder; 14: Rotating handle; 15: Spring; 16: Upper discharge plate; 17: Upper discharge port; 18: Lower discharge plate; 19: Lower outlet; 20: Bottom plate; 21: Bottom outlet; 22: Feed shell; 23: Feed inlet; 24: Adjustment plate; 25: Closure cover; 26: Upper vent hole; 27: Upper vent bag ;28: Upper exhaust port; 29: Upper exhaust fan; 30: Middle ventilation hole; 31: Middle exhaust bag; 32: Middle exhaust port; 33: Middle exhaust fan; 34: Lower ventilation hole; 35: Lower exhaust bag ;36: lower exhaust port; 37: lower exhaust fan; 38: blowing fan; 39: drive motor; 40: rotating shaft; 41: disc; 42: eccentric column; 43: vibration shaft; 44: rotating arm; 45: bearing seat; 46: first pulley; 47: second pulley; 48: first bevel gear; 49: second bevel gear; 50: third pulley; 51: fourth pulley; 52: fifth pulley; 53: sixth pulley; 54: first sprocket; 55: second sprocket; 56: third sprocket; 57: chain; 58: long hole; 59: moving rod; 60: bristles;

Detailed ways

The foregoing and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to FIGS. 1 to 7 . The structural contents mentioned in the following embodiments are all referenced to the accompanying drawings.

Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

Embodiment 1, a grain winnowing vibrating screen, including a base frame 1 for supporting the entire device, a vibrating screen mechanism 2 is installed on the base frame 1, and the vibrating screen mechanism 2 can shake, so as to realize the screening of grains. A feeding mechanism 3 is installed on the vibrating screen mechanism 2, which is used to place the grains for screening. A magnetic plate 4 is installed on the vibrating screen mechanism 2, and the magnetic plate 4 has the function of adsorbing metal, thereby adsorbing the metal iron filings in the impurities. , a negative pressure mechanism is installed on the vibrating screen mechanism 2, which is used to remove light impurities, grain peels, leaves, small wooden sticks, etc. in the grain. The force is greater than the shaking force of the vibrating screen mechanism 2 .

Embodiment 2, on the basis of Embodiment 1, the bottom frame 1 includes two front supports 5 and two rear supports 6, and the height of the two rear supports 6 is higher than the two front supports 5, and the vibrating screen The mechanism 2 is placed on the rear bracket 6 and the front bracket 5, so that the vibrating screen mechanism 2 is inclined downward from left to right. The upper ends of the front bracket 5 and the rear bracket 6 are installed with a beam 7, and the inclination angle of the beam 7 is related to the vibration. The inclination angle of the screen mechanism 2 is the same, and a reinforcing rod 8 is also installed between the two front brackets 5 and the two rear brackets 6 .

Embodiment 3, on the basis of Embodiment 2, the vibrating screen mechanism 2 includes a screening shell 9 placed obliquely, the screening shell 9 has a bottom plate 20, the interior of the screening shell 9 is an opening above the cavity, and the inclination angle of the screening shell 9 is the same as that of the beam. The inclination angle of 7 is the same, and two upper screen 10 and lower screen 11 are installed in the screen shell 9. The filter grade of the upper screen 10 is lower than that of the lower screen 11, that is, the upper screen The filter holes are larger than those of the lower screen 11 .

Embodiment 4, on the basis of Embodiment 3, four upper cylinders 12 are installed on the inner side walls of the two beams 7, two upper cylinders 12 are installed on each beam 7, and two upper cylinders 12 are installed on both sides of the screening shell 9. The lower cylinder 13 at the corresponding position of the upper cylinder 12, a rotating handle 14 is rotatably connected between the upper cylinder 12 and the lower cylinder 13, which is convenient for the rotating handle 14 to rotate when the screening shell 9 vibrates. A spring 15 is connected between them.

Embodiment 5, on the basis of Embodiment 3, an inclined upper discharge plate 16 is installed at the front end of the upper screen 10, and an upper discharge port 17 is installed at the upper discharge plate 16, and the upper discharge plate 16 can be The grain or impurities flow out from the upper discharge port 17. Similarly, an inclined lower discharge plate 18 is installed at the front end of the lower screen 11, and a lower discharge port 19 is installed at the lower discharge plate 18. The upper discharge plate 16 and The lower discharge plate 18 is in an inclined cross state, but not on the same plane. The upper discharge port 17 and the lower discharge port 19 are placed on both sides of the screen shell 9, and a bottom discharge port is opened at the front end of the bottom plate 20 of the screen shell 9. mouth 21.

The bottom plate 20 is used to flow down the screened grain, the lower screen 11 is the grain or impurities that have been screened once, and the upper screen 10 is the remaining impurities.

Embodiment 6, on the basis of Embodiment 2, the feeding mechanism 3 includes a feeding shell 22 behind the beam 7, the top of the feeding shell 22 is opened, and the front end of the feeding shell 22 is provided with a feeding port 23, and the feeding An adjusting plate 24 is installed at the port 23, and the adjusting plate 24 can adjust the opening size of the feeding port 23, and the feeding port 23 is used for placing the feeding material.

Embodiment 7, on the basis of Embodiment 3, the negative pressure mechanism includes a closing cover 25 that is detachably fastened to the screening shell 9. The side wall of the closing cover 25 is provided with an upper ventilation hole 26, and the upper ventilation hole 26 passes through the upper ventilation hole 26. The exhaust bag 27 is connected with an upper exhaust port 28 on the ground, an upper exhaust fan 29 is installed in the upper exhaust port 28, and a middle air hole 30 is opened on the side wall of the screen shell 9 at the lower screen 11. , the middle air hole 30 is connected with the middle air outlet 32 placed on the ground through the middle air outlet bag 31, the middle air exhaust fan 33 is installed at the middle air outlet 32, and the screen shell 9 side at the bottom plate 20 of the screening shell 9 A lower ventilation hole 34 is opened on the wall. The lower ventilation hole 34 is connected with a lower exhaust port 36 placed on the ground row through a lower exhaust bag 35 , and a lower exhaust fan 37 is installed at the lower exhaust port 36 .

The positions of the upper vent hole 26 , the middle vent hole 30 and the lower vent hole 34 can also be set on the rear wall of the screening shell 9 in addition to the side walls, so that the installation does not affect other mechanisms or installations.

And the bottom plate 20 of the screening shell 9 can also be set as a transparent dense mesh, but the dense mesh cannot pass the grain, but gas can pass through. Two upward blowing fans 38 are fixed under the dense mesh, and the blowing fans 38 can blow toward The inner bottom plate 20 of the screening shell 9 , the lower screen 11 , and the upper screen 10 .

In the eighth embodiment, on the basis of the third embodiment, the magnetic plate 4 is fixed on the upper screen 10, the lower screen 11 and the bottom plate 20. The magnetic plate 4 has the same structure as the upper screen 10 and the lower screen 11, and does not affect the structure of the upper screen 10 and the lower screen 11. The normal filtering function, or the upper screen 10 and the lower screen 11 are inlaid with magnetic blocks to absorb metal chips. A magnetic plate 4 is installed, and the adsorption force of the magnetic plate 4 on the metal chips is greater than the shaking force of the vibrating screen mechanism 2 .

The ninth embodiment, on the basis of the seventh embodiment, includes a drive motor 39, the drive motor 39 is coaxially connected with a disc 41 through the rotating shaft 40, and an eccentric column 42 is eccentrically fixed on the disc 41, and is on the rear wall of the screening shell 9. A vibration shaft 43 is installed, a rotating arm 44 is rotatably connected between the eccentric column 42 and the vibration shaft 43, a bearing seat 45 is fixed on the rotating shaft 40, the bearing seat 45 is fixed on the reinforcement rod 8, and the rotating shaft 40 is also sleeved with The first pulley 46, the first pulley 46 is connected to the second pulley 47 through a belt, the second pulley 47 is coaxially connected with a first bevel gear 48, and the first bevel gear 48 is also meshed with a second bevel gear 49 for changing directions, A third pulley 50 is coaxially connected to the second bevel gear 49, and a fourth pulley 51 is connected to the third pulley 50 through a belt. Dry inside.

A fifth pulley 52 is also sleeved on the rotating shaft 40, the fifth pulley 52 is connected with a sixth pulley 53 through the pulley, the sixth pulley 53 is coaxially connected with a first sprocket 54, and the first sprocket 54 is arranged in the same plane There are a second sprocket 55 and a third sprocket 56. The first sprocket 54, the second sprocket 55, and the third sprocket 56 are connected by the chain 57, or the traditional connection method is adopted, that is, the first sprocket is driven by two connections. The sprocket 54 and the second sprocket 55 are drivingly connected, and the second sprocket 55 and the third sprocket 56 are drivingly connected. Middle exhaust fan 33 and lower exhaust fan 37 .

Embodiment 10, on the basis of Embodiment 3, on the side wall of the screening shell 9 corresponding to the upper screening net 10, the lower screening net 11, and the bottom plate 20 of the screening shell 9 are provided with elongated holes 58. The position will not affect the upper vent hole 26, the middle vent hole 30, and the lower vent hole 34. A moving rod 59 is slidably installed in the elongated hole 58. The bristles 60 are tight, and the rear end of the moving rod 59 is provided with a telescopic pull rod 61 penetrating the rear wall of the screening shell 9 .

In specific use, the screened grains, such as wheat, corn, soybeans, etc., are installed on the bottom frame 1 with a switch to control the drive motor 39, start the drive motor 39, and the drive motor 39 drives the disc 41 to rotate through the rotating shaft 40. The eccentric column 42 drives the rotating arm 44 to rotate on the disc 41 , the rotating arm 44 drives the vibration shaft 43 to vibrate back and forth, and the vibration shaft 43 drives the screening shell 9 to vibrate back and forth, thereby realizing grain screening.

The drive motor 39 drives the first pulley 46 to rotate at the same time, the first pulley 46 drives the second pulley 47 to rotate, the second pulley 47 drives the first bevel gear 48 to rotate, the first bevel gear 48 changes direction through the second bevel gear 49, and the second pulley 47 rotates. The bevel gear 49 drives the third pulley 50 to rotate, the third pulley 50 and the fourth pulley 51 drive the blowing fan 38 to blow upwards, the two sides of the blowing fan 38 are sealed with casings, and the blowing fan 38 blows toward the dense mesh, the lower screen 11, the upper The screen 10 is used to blow dust, impurities and light objects in the grain.

The drive motor 39 drives the fifth pulley 52 at the same time, the fifth pulley 52 drives the sixth pulley 53 to rotate, the sixth pulley 53 drives the first sprocket 54 to rotate, and the first sprocket 54 drives the second sprocket 55 and the third through the chain 57. The sprocket 57 rotates, so that the upper exhaust fan 29, the middle exhaust fan 33, and the lower exhaust fan 37 perform negative pressure adsorption on the upper screen 10, the lower screen 11, and the dense screen, respectively, to remove impurities from the adsorption.

The grain enters the screening shell 9 from the feeding shell 22, and the adjusting plate 24 can adjust the size of the feeding port 23. After the vibration screening of the screening shell 9, the upper screen 10 is filtered once, and the lower screen 11 is filtered twice. The upper discharge port 17 and the lower discharge port 19 flow out, and the finally screened grain flows out from the bottom discharge port 21 .

When the screening is completed, stretch the telescopic pull rod 61, pull the telescopic pull rod 61 back and forth, and the bristles 60 clean the upper screen 10, the lower screen 11, and the bottom plate 20 at the corresponding positions respectively. When not in use, pull the telescopic pull rod 61 to The left end of the casing 9 is screened, and then the telescopic rod 61 is shortened.

Compared with the prior art, the utility model has the following technical effects:

1. Multi-stage screening of grain is carried out through the upper screen, the lower screen and the screen bottom plate, so that the separation of grain and impurities is cleaner and the screening efficiency is higher.

2. Through the adsorption of iron filings by the magnetic plate, it is used to remove iron filings impurities in the grain.

3. The light impurities such as dust and grain skin generated by the vibration in the screening shell are adsorbed by negative pressure through the exhaust fan, so as to remove the light impurities in the grain.

4. The inside of the screening shell is blown by the blowing fan, and the negative pressure adsorption of the exhaust fan is used to speed up the removal of impurities in the grain by the negative pressure.

5. The upper screen, the lower screen and the bottom plate of the screen shell are cleaned by the moving rod and the bristles, which is convenient for cleaning the inside of the screen shell.

6. Using one drive motor can drive the vibration of the screening shell, the start of the exhaust fan and the blowing fan at the same time, which saves electricity and is easy to operate.

7. The utility model is improved on the basis of the existing vibrating screen, the structure is simple, the improvement is convenient, the maintenance is convenient, the screening efficiency is improved, and the utility model has strong practicability.

Claims (10)

1. The utility model provides a grain wind selection shale shaker, includes chassis (1), installs vibrating screen mechanism (2) that can rock on chassis (1), installs feed mechanism (3) on vibrating screen mechanism (2), its characterized in that, install magnetic plate (4) on vibrating screen mechanism (2), install negative pressure mechanism on vibrating screen mechanism (2).

2. The grain winnowing vibrating screen according to claim 1, characterized in that the chassis (1) comprises two front brackets (5) and two rear brackets (6), the rear brackets (6) are higher than the front brackets (5) so that the vibrating screen mechanism (2) is inclined downwards from left to right, inclined cross beams (7) are mounted at the upper ends of the front brackets (5) and the rear brackets (6), and reinforcing rods (8) are mounted between the two front brackets (5) and the two rear brackets (6).

3. The grain wind sorting vibrating screen according to claim 2, characterized in that the vibrating screen mechanism (2) comprises a screening shell (9) which is obliquely arranged, the inclination angles of the screening shell (9) and the cross beam (7) are the same, an upper screening net (10) and a lower screening net (11) are installed in the screening shell (9), and the filtering holes of the upper screening net (10) are larger than the filtering holes of the lower screening net (11).

4. The grain wind sorting vibrating screen of claim 3, characterized in that four upper cylinders (12) are installed on the inner side wall of the beam (7), four lower cylinders (13) corresponding to the upper cylinders (12) are installed on two sides of the screening shell (9), a rotating handle (14) is rotatably connected between the upper cylinders (12) and the lower cylinders (13), and a spring (15) is connected between the front end of the screening shell (9) and the reinforcing rod (8).

5. The grain wind sorting vibrating screen according to claim 3, characterized in that an inclined upper discharging plate (16) is installed at the front end of the upper screening net (10), an upper discharging hole (17) is installed at the upper discharging plate (16), an inclined lower discharging plate (18) is installed at the front end of the lower screening net (11), a lower discharging hole (19) is installed at the lower discharging plate (18), the upper discharging plate (16) and the lower discharging plate (18) are in a crossed inclined state, the upper discharging hole (17) and the lower discharging hole (19) are arranged at two sides of the screening shell (9), and a bottom discharging hole (21) is formed at the front end of a bottom plate (20) of the screening shell (9).

6. The grain wind sorting vibrating screen according to claim 2, wherein the feeding mechanism (3) comprises a feeding shell (22) arranged at the rear end of the cross beam (7), an opening is formed above the feeding shell (22), a feeding hole (23) is formed in the front end of the feeding shell (22), and an adjusting plate (24) is installed at the feeding hole (23).

7. The grain air separation vibrating screen as claimed in claim 3, wherein the negative pressure mechanism comprises a detachable closing cover (25) arranged on the screening shell (9), the side wall of the closing cover (25) is provided with an upper vent hole (26), the upper vent hole (26) is connected with an upper exhaust port (28) arranged on the ground through an upper exhaust bag (27), the upper exhaust port (28) is provided with an upper exhaust fan (29), the side wall of the screening shell (9) at the lower screening net (11) is provided with a middle vent hole (30), the middle vent hole (30) is connected with a middle exhaust port (32) arranged on the ground through a middle exhaust bag (31), the middle exhaust port (32) is provided with a middle exhaust fan (33), the side wall of the screening shell (9) at the bottom plate (20) of the screening shell (9) is provided with a lower vent hole (34), the lower vent hole (34) is connected with a lower exhaust port (36) arranged on the ground through a lower exhaust bag (35), a lower exhaust fan (37) is installed at the lower exhaust port (36), the bottom plate (20) of the screening shell (9) is a dense net, and a plurality of air blowing fans (38) blowing upwards are fixed below the dense net.

8. The grain wind sorting vibrating screen of claim 5, characterized in that the magnetic plate (4) is fixed on the upper screening net (10) and the lower screening net (11), the magnetic plate (4) is installed on the bottom plate (20), and the magnetic plate (4) is installed on the upper discharging port (17), the lower discharging port (19) and the bottom discharging port (21).

9. The grain wind sorting vibrating screen of claim 7, further comprising a driving motor (39), wherein the driving motor (39) is connected with a disc (41) through a rotating shaft (40), an eccentric column (42) is eccentrically fixed on the disc (41), a vibrating shaft (43) is installed on the rear wall of the screening shell (9), the eccentric column (42) and the vibrating shaft (43) are connected through a rotating arm (44), the rotating shaft (40) is fixed on the reinforcing rod (8) through a bearing seat (45), a first belt pulley (46) is sleeved on the rotating shaft (40), the first belt pulley (46) is connected with a second belt pulley (47) through a belt, the second belt pulley (47) is coaxially connected with a first bevel gear (48), the first bevel gear (48) is engaged with a second bevel gear (49), the second bevel gear (49) is coaxially connected with a third belt pulley (50), third belt pulley (50) is connected with fourth belt pulley (51) through the belt, is connected with fan of blowing (38) on third belt pulley (50) and fourth belt pulley (51) respectively, still the cover is equipped with fifth belt pulley (52) on pivot (40), and fifth belt pulley (52) is connected with sixth belt pulley (53) through the belt, and sixth belt pulley (53) coaxial coupling has first sprocket (54), and second sprocket (55) and third sprocket (56) have been placed in first sprocket (54) parallel, and first sprocket (54), second sprocket (55), third sprocket (56) are connected through chain (57), and first sprocket (54), second sprocket (55), third sprocket (56) are connected with last row fan (29), well exhaust fan (33), lower row fan (37) respectively.

10. The grain wind sorting vibrating screen according to claim 3, characterized in that the side wall of the screening shell (9) is provided with a long hole (58) corresponding to the upper screening net (10), the lower screening net (11) and the bottom plate (20) of the screening shell (9), a moving rod (59) transversely penetrating through the screening shell (9) is slidably mounted in the long hole (58), closely attached bristles (60) are mounted below the moving rod (59), and a telescopic pull rod (61) penetrating through the screening shell (9) is mounted at the rear end of the moving rod (59).

Images