CN214600666U

CN214600666U - Wash beans and remove husky all-in-one

Info

Publication number: CN214600666U
Application number: CN202120588219.3U
Authority: CN
Inventors: 黎清宁; 廖国富; 张文昌; 李莹莹; 廖国贵; 叶琳; 陈荣锋; 刘胜强; 韦兴
Original assignee: Guilin University of Electronic Technology
Current assignee: Guilin University of Electronic Technology
Priority date: 2021-03-23
Filing date: 2021-03-23
Publication date: 2021-11-05
Anticipated expiration: 2031-03-23

Abstract

The utility model relates to a bean washing and sand removing integrated machine, which comprises a frame, a screening device, a cleaning device, a drying device and a driving motor; the screening device is arranged above the rear end of the rack and can slide back and forth to screen and convey the bean crops downwards; the cleaning device is arranged on the rack, the rear end of the cleaning device is arranged in the screening device, the front end of the cleaning device extends forwards along the rack to receive and convey the bean crops conveyed downwards by the screening device forwards, and the bean crops are cleaned in the process of being conveyed forwards; the drying device is arranged on the front side of the rack, and an inlet of the drying device is connected with the front end of the cleaning device so as to receive the legume crops cleaned by the cleaning device and dry the legume crops; the driving motor is fixed at the rear side of the frame and is respectively connected with and drives the screening device and the cleaning device. This production line assembly line operation can be to beans crop autofilter, washing and stoving ejection of compact, and structural design is humanized, work efficiency is high.

Description

Wash beans and remove husky all-in-one

Technical Field

The utility model relates to an agricultural machinery field, concretely relates to wash beans and remove husky all-in-one.

Background

Beans generally refer to all leguminous plants producing pods, and the common legume crops in life are soybeans, peanuts, broad beans, peas, kidney beans, lentils, and the like. Before processing the bean crops, the impurities such as shell scraps and the like need to be screened out by a dustpan manually, and in addition, the impurities such as sand stones, dust and the like mixed in the bean crops also need to be cleaned. The manual completion of the above operation consumes a lot of labor and is not efficient.

SUMMERY OF THE UTILITY MODEL

To sum up, for overcoming prior art not enough, improve production efficiency, overcome the weak point among the prior art, the utility model aims to solve the technical problem that a beans washing and sand removing all-in-one is provided, its practicality is high, efficient, and have the beans washing assembly line device of resource saving advantage.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a bean washing and sand removing integrated machine comprises a frame, a screening device, a cleaning device, a drying device and a driving motor; the screening device is arranged above the rear end of the rack and can slide back and forth to screen and convey the legume crops downwards; the cleaning device is arranged on the frame, the rear end of the cleaning device is positioned in the screening device, the front end of the cleaning device extends forwards along the frame to receive and convey the bean crops conveyed downwards by the screening device forwards, and the bean crops are cleaned in the process of the forward conveying; the drying device is arranged on the front side of the rack, and an inlet of the drying device is connected with the front end of the cleaning device so as to receive the legume crops cleaned by the cleaning device, dry the legume crops after cleaning and output the legume crops forwards; the driving motor is fixed on the rear side of the rack and is respectively connected with and drives the screening device and the cleaning device.

The utility model has the advantages that: the assembly line operation can be used for automatically screening, cleaning and drying the bean crops, and the structural design is humanized and the working efficiency is high.

On the basis of the technical scheme, the utility model discloses can also do as follows the improvement:

further, the screening device comprises a base, a screening box and a crank; the base is of a frame structure and is upwards fixed at the rear end of the rack, and a rolling groove is formed in the top of the base along the front-back direction; the screening box is of a box body structure with an upward opening, and the bottom of the screening box is provided with a detachable screening plate with a mesh structure; the lower side of the screening box is rotatably provided with a roller, and the roller can be positioned in the rolling groove in a rolling way;

connecting rods extending outwards are fixed to two sides of the screening box respectively; the cranks and the connecting rods are arranged in a one-to-one correspondence manner, one ends of the cranks are rotatably fixed on the base and correspond to the positions below the corresponding connecting rods, and the other ends of the cranks are connected with the corresponding connecting rods through pushing mechanisms; the driving motor is connected with and drives the crank to rotate, so that the screening box can slide back and forth in a reciprocating manner to screen the bean crops.

The beneficial effect of adopting the further technical scheme is as follows: realize the screening of the bean crops.

Further, the pushing mechanism comprises a sliding rod, a guide rail and a sliding block; the sliding rod is arranged on the outer side of the base in a front-back sliding mode and corresponds to the position of the corresponding crank; the guide rail is of an arc strip-shaped structure which is vertically arranged in the radial direction and is fixed in the middle of the sliding rod, and the upper end of the guide rail is connected with the corresponding connecting rod; an arc-shaped guide groove is formed in the guide rail, and the sliding block is slidably arranged in the guide groove and connected with the other end of the crank.

The beneficial effect of adopting the further technical scheme is as follows: adopt slider-crank mechanism to realize the screening of beans crop, can truly simulate artifical screening action, have the high efficiency.

Furthermore, a first rotating shaft and a second rotating shaft are respectively and rotatably arranged at the rear side of the rack; the output end of the driving motor is connected with one end of the first rotating shaft through a first belt in a linkage mode, the other end of the first rotating shaft is connected with the middle of the second rotating shaft through a second belt in a linkage mode, and the two ends of the second rotating shaft are connected with and drive the crank to rotate correspondingly through a third belt.

The beneficial effect of adopting the further technical scheme is as follows: the cranks on the two sides of the frame move simultaneously through the driving motor.

Further, the cleaning device comprises a conveying belt, a water tank, a water pipe, a water pump, a plurality of spray heads and a plurality of supporting rollers; the supporting rollers are respectively rotatably arranged on the rack along the front and back directions; the conveying belt is provided with drain holes which are sleeved on the supporting roller and circularly move back and forth along with the rotation of the supporting roller, the rear end of the conveying belt is positioned in the base and corresponds to the lower part of the screening box, and a material selecting hopper is fixed between the base and the rear end of the conveying belt corresponding to the screening box; the water tank is fixed on the frame and corresponds to the lower part of the conveyor belt, and the opening of the water tank is arranged upwards; a filter plate is arranged in the water tank, and the side part of the filter plate is provided with a water outlet; the spray heads are distributed above the conveying belt, and the water pump is fixed on the rack and communicates the water tank with the spray heads through the water pipes;

the supporting roller at the forefront is a positioning roller, and a tensioning mechanism for adjusting the position of the positioning roller back and forth to adjust the tightness of the conveyor belt is arranged at the position, corresponding to the positioning roller, on the rack;

the output end of the driving motor is provided with a first chain wheel, the supporting roller at the rearmost part is provided with a second chain wheel, and the first chain wheel is connected with the second chain wheel through a chain.

The beneficial effect of adopting the further technical scheme is as follows: the screened bean crops are cleaned, water circulation is achieved, and water resources are saved.

Further, the tensioning mechanism comprises a slide and a bolt; the sliding seats are slidably arranged on the front two sides of the rack and correspond to the positions of the positioning rollers, and the positioning rollers are rotatably arranged on the sliding seats; one end of the bolt is connected with the front part of the sliding seat, and the other end of the bolt extends forwards and penetrates through the side wall of the front end of the rack; and the bolt is provided with a nut for adjusting the position of the sliding seat back and forth.

The beneficial effect of adopting the further technical scheme is as follows: the tightness of the conveying belt can be adjusted.

Further, the drying device comprises an auxiliary feeding box, a material guide plate and a material guide pipe; the auxiliary feeding box is fixed on the front side of the rack, and the rear end of the auxiliary feeding box is higher than the front end of the auxiliary feeding box; the rear end of the guide plate is fixed on the rack and corresponds to the lower part of the rear end of the conveyor belt, the front end of the guide plate extends downwards in an inclined mode and then is connected with an inlet at the rear end of the auxiliary feeding box, and cleaned bean crops are conveyed into the auxiliary feeding box; the material guide pipe is fixed on the front side of the auxiliary feeding box, the rear end of the material guide pipe is lower than the front end of the auxiliary feeding box, the front end of the material guide pipe is higher than the front end of the auxiliary feeding box, an outlet at the front end of the auxiliary feeding box is connected with an inlet at the rear end of the material guide pipe so as to convey cleaned beans forwards into the material guide pipe, draining is carried out firstly, and a water outlet for discharging the drained water is formed in the bottom of the rear end of the material guide pipe; the utility model discloses a bean drying machine, including baffle pipe, feed conduit, heating wire, discharge gate, feed mechanism, drying wire, and feeding mechanism, which are arranged in the feed conduit, and the side wall, and the feed conduit, and the inside is arranged inside the feed conduit.

The beneficial effect of adopting the further technical scheme is as follows: the cleaned bean crops are drained and dried.

Furthermore, a water strainer is arranged at the top in the water outlet, and steam outlets are formed in the material guide pipe and the auxiliary feeding box.

The beneficial effect of adopting the further technical scheme is as follows: and finishing the draining and the discharge of the steam generated by drying.

Further, a cavity is arranged in the side wall of the material guide pipe, and the electric heating wire is positioned in the cavity.

Further, the feeding mechanism comprises a driving shaft and a helical blade; the driving shaft is rotatably arranged in the material guide pipe, and one end of the driving shaft extends out of the material guide pipe; a feeding motor is arranged outside the material guide pipe, and the output end of the feeding motor is in linkage connection with one end of the driving shaft; the helical blade is positioned in the material guide pipe and fixed on the driving shaft and conveys the bean crops after being drained forwards along with the rotation of the driving shaft.

The beneficial effect of adopting the further scheme is that: the beans in the material guide pipe are conveyed forwards.

Drawings

FIG. 1 is a block diagram of the present invention;

FIG. 2 is a block diagram of the screening apparatus and the cleaning apparatus after they have been assembled;

FIG. 3 is an enlarged view A of FIG. 2;

FIG. 4 is an enlarged view B of FIG. 2;

FIG. 5 is a view showing the assembled structure of the washing apparatus and the drying apparatus;

fig. 6 is a sectional view of the drying apparatus.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a frame, 2, a driving motor, 3, a base, 4, a screening box, 5, a crank, 6, a rolling groove, 7, a connecting rod, 8, a slide rod, 9, a guide rail, 10, a slide block, 11, a guide groove, 12, a first rotating shaft, 13, a second rotating shaft, 14, a first belt, 15, a second belt, 16, a third belt, 17, a conveying belt, 18, a water tank, 19, a water pipe, 20, a water pump, 21, a spray head, 22, the device comprises a supporting roller 23, a material selecting hopper 24, a water outlet 25, a positioning roller 26, a chain 27, a sliding seat 28, bolts 29, nuts 30, an auxiliary feeding box 31, a material guide plate 32, a material guide pipe 33, a water outlet 34, an electric heating wire 35, a material outlet 36, a driving shaft 37, a spiral blade 38, a feeding motor 39, a screening device 40, a cleaning device 41, a drying device 42, a steam outlet 43 and a water strainer.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in figure 1, the bean washing and sand removing integrated machine comprises a frame 1, a screening device 39, a cleaning device 40, a drying device 41 and a driving motor 2. The screening device sets up in the top of frame 1 rear end to the screening device can slide in order to realize screening and the downward transport to the beans crop. The cleaning device 40 is arranged on the frame 1, the rear end of the cleaning device 40 is positioned in the screening device, the front end of the cleaning device extends forwards along the frame 1 to receive and convey the bean crops conveyed downwards by the screening device, and the bean crops are cleaned in the process of forward conveying. The drying device 41 is arranged at the front side of the frame 1, and an inlet of the drying device 41 is connected with the front end of the cleaning device 40 to receive the legume crops cleaned by the cleaning device 40, dry the cleaned legume crops and output the legume crops forwards. The driving motor 2 is fixed at the rear side of the frame 1, and is connected to and drives the screening device 39 and the cleaning device 40, respectively. The above and the following "forward and backward" are determined according to the movement direction of the reference bean, that is, the reference bean is at the rear at first and gradually moves forward with time.

As shown in fig. 2 and 3, the screening apparatus comprises a base 3, a screening box 4 and a crank 5. The base 3 is of a frame structure and is upwards fixed at the rear end of the rack 1, and a rolling groove 6 is formed in the top of the base 3 along the front-back direction. Screening case 4 is the box structure that the opening is up, and its bottom is the screening board that detachable was equipped with mesh structure. The setting can be dismantled in screening case 4 bottoms to the screening board, can satisfy the screening of multiple beans through the screening board that is equipped with different apertures, has higher practicality. The lower side of the screening box 4 is rotatably provided with a roller, and the roller can be rolled in the rolling groove 6. And connecting rods 7 extending outwards are respectively fixed on two sides of the screening box 4. The cranks 5 are arranged in one-to-one correspondence with the connecting rods 7, one ends of the cranks 5 are rotatably fixed on the base 3 and correspond to the positions below the corresponding connecting rods 7, and the other ends of the cranks are connected with the corresponding connecting rods 7 through pushing mechanisms. The driving motor 2 is connected with and drives the crank 5 to rotate, so that the screening box 4 can slide back and forth in a reciprocating manner to screen the legume crops. The pushing mechanism comprises a sliding rod 8, a guide rail 9 and a sliding block 10. The slide bar 8 is mounted on the outer side of the base 3 in a back-and-forth sliding manner and corresponds to the position of the crank 5. The guide rail 9 is an arc strip-shaped structure which is vertically arranged in the radial direction and is fixed in the middle of the sliding rod 8, and the upper end of the guide rail 9 is connected with the corresponding connecting rod 7. An arc-shaped guide groove 11 is arranged in the guide rail 9, and the slide block 10 can slide in the guide groove 11 and is connected with the other end of the crank 5.

As shown in fig. 2, the cleaning device 40 includes a conveyor 17, a water tank 18, a water pipe 19, a water pump 20, a plurality of spray heads 21, and a plurality of support rollers 22. The support rollers 22 are rotatably mounted on the frame 1 in the front-rear direction, respectively. The conveyor belt 17 is provided with drain holes which are sleeved on the supporting roller 22 and circularly move back and forth along with the rotation of the supporting roller 22, the rear end of the conveyor belt 17 is positioned in the base 3 and corresponds to the lower part of the screening box 4, and a material selecting funnel 23 is fixed between the base 3 and the rear end of the conveyor belt 17 corresponding to the screening box 4. The water tank 18 is fixed on the frame 1 and corresponds to the lower part of the conveyor belt 17, and the opening of the water tank is arranged upwards. A filter plate is arranged in the water tank 18, and a water outlet 24 is arranged on the side part of the filter plate. The spray heads 21 are distributed above the conveyor belt 17, and the water pump 20 is fixed on the frame 1 and communicates the water tank 18 with the spray heads 21 through the water pipes 19. The water pump 20 pumps the water in the water tank 18 into the water pipe 19 and then sprays the water through the spray head 21 to the conveyor belt 17, so as to clean the legume crops on the conveyor belt 17. The washing water flows back to the water tank 18 through the drain hole on the conveyor belt 17 for recycling. A filter screen can be arranged in the water tank 18 to filter impurities such as particles in the circulating water, and after the water in the water tank 18 is used for a certain time, the water is discharged through the water discharge opening 24 and then is injected with new water.

The supporting roller 22 at the forefront is a positioning roller 25, and a tensioning mechanism for adjusting the position of the positioning roller 25 back and forth to adjust the tightness of the conveyor belt 17 is arranged at the position, corresponding to the positioning roller 25, on the rack 1. As shown in fig. 4, the tensioning mechanism includes a slide 27 and a bolt 28. The sliding base 27 is slidably mounted on the front two sides of the rack 1 and corresponds to the position of the positioning roller 25, and the positioning roller 25 is rotatably mounted on the sliding base 27. One end of the bolt 28 is connected to the front part of the slide carriage 27, and the other end extends forward and penetrates through the side wall of the front end of the frame 1. A nut 29 for adjusting the position of the slide carriage 27 back and forth is provided on the bolt 28. The nut 29 is turned, which drives the slide carriage 27 to slide back and forth through the bolt 28, thereby realizing the back and forth movement of the positioning roller 25 to tighten or loosen the conveyor belt 17, and finally adjusting the tightness of the conveyor belt 17 to be within a proper range.

A first rotating shaft 12 and a second rotating shaft 13 are respectively rotatably arranged at the rear side of the frame 1. The output end of the driving motor 2 is in linkage connection with one end of the first rotating shaft 12 through a first belt 14, the other end of the first rotating shaft 12 is in linkage connection with the middle of the second rotating shaft 13 through a second belt 15, and the two ends of the second rotating shaft 13 are connected with and drive the crank 5 to rotate through a third belt 16 respectively. The output end of the driving motor 2 is provided with a first chain wheel, the support roller 22 at the rearmost end is provided with a second chain wheel, and the first chain wheel is linked with the second chain wheel through a chain 26. Through the design, the driving motor 2 drives the screening device and the cleaning device at the same time, namely, one driving motor 2 can drive the screening box 4 to slide back and forth and the conveyor belt 17 to do circulating motion back and forth, so that the structure of the whole machine is simplified, the manufacturing cost is reduced, and the cleaning machine has higher economical efficiency.

As shown in fig. 5, the drying device 41 includes an auxiliary feeding box 30, a guide plate 31, and a guide duct 32. The auxiliary feeding box 30 is fixed on the front side of the rack 1, and the rear end of the auxiliary feeding box 30 is higher than the front end. The rear end of the material guide plate 31 is fixed on the frame 1 and corresponds to the lower part of the rear end of the conveyor belt 17, the front end of the material guide plate extends obliquely downwards and then is connected with the inlet at the rear end of the auxiliary feeding box 30, and the cleaned bean crops are conveyed into the auxiliary feeding box 30. The material guiding pipe 32 is fixed on the front side of the auxiliary material feeding box 30, the rear end of the material guiding pipe 32 is lower than the front end of the auxiliary material feeding box 30, the outlet of the front end of the auxiliary material feeding box 30 is connected with the inlet of the rear end of the material guiding pipe 32 so as to convey cleaned beans forward into the material guiding pipe 32 for draining, a water draining port 33 for draining water is arranged at the bottom of the rear end of the material guiding pipe 32, and a water strainer 43 is arranged at the top in the water draining port 33. Most of the water in the cleaned legume crop flows back into the water tank 18, and a small portion of the water enters the material guide plate 31 through the auxiliary feeding box 30. Because the rear end of the material guiding pipe 32 is arranged lower than the front end and the water outlet 33 is arranged at the lower front end, the moisture carried by the bean crops under the action of gravity can be discharged through the water outlet 33 to finish draining. The utility model discloses a bean crop drying machine, including baffle tube 32, feed conduit 32, heating wire 34, the bottom of its front end is equipped with discharge gate 35 with the discharged bean crop of drying, be equipped with the feeding mechanism with the bean crop after the waterlogging caused by excessive rainfall forward transport in the baffle tube 32, the bean crop after the waterlogging caused by excessive rainfall can be continued to be carried forward in baffle tube 32 by feeding mechanism, and the bean crop can be heated and dried in the in-process that the baffle tube 32 is carried forward, discharges through discharge gate 35 at last. The material guide pipe 32 and the auxiliary feeding box 30 are both provided with steam outlets 42, steam can be generated in the process of heating and drying the bean crops, and the steam is discharged in time through the steam outlets 42 so as to prevent explosion caused by overhigh steam accumulation pressure in the material guide pipe 32 and the auxiliary feeding box 30.

As shown in fig. 6, a cavity is formed in a sidewall of the feeding tube 32, and the heating wire 34 is disposed in the cavity. The feed mechanism comprises a drive shaft 36 and a helical blade 37. The driving shaft 36 is rotatably provided inside the guide tube 32, and one end of the driving shaft 36 is protruded out of the guide tube 32. A feeding motor 38 is arranged outside the material guide pipe 32, the output end of the feeding motor 38 is in linkage connection with one end of the driving shaft 36, and the driving shaft 36 is driven to rotate after the feeding motor 38 decelerates. The helical blade 37 is positioned in the material guiding pipe 32 and fixed on the driving shaft 36 and conveys the bean crops after being drained forwards along with the rotation of the driving shaft 36.

The working process of the cleaning line is explained as follows:

and starting the driving motor 2, and driving the screening box 4 to slide back and forth and the conveyor belt 17 to circularly move back and forth after speed reduction. The bean crop is first added into the screening chamber 4, and screening of the bean crop is completed by vibration generated by the forward and backward sliding of the screening chamber 4. The screened legume crop falls onto the conveyor 17 via the sorting hopper 23 and moves forward with the conveyor 17. Beans crop can be sprayed by shower nozzle 21 and wash on conveyer belt 17 forward the in-process of carrying, plays shower nozzle 21 and can set up the multirow, and every row is a plurality of to guarantee that the water spray scope covers conveyer belt 17, thereby improve the cleaning performance. The cleaned bean crops enter the material guiding pipe 32 through the material guiding plate 31 and the auxiliary material feeding box 30 under the action of self gravity, and are drained at the rear end of the material guiding pipe 32, and then are driven by the helical blades 37 to move forwards in the material guiding pipe 32 after being drained. The beans are heated and dried by the heating wire 34 while the feeding pipe 32 moves forward, and finally discharged through the discharging port 35.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A bean washing and sand removing integrated machine is characterized by comprising a rack (1), a screening device (39), a cleaning device (40), a drying device (41) and a driving motor (2); the screening device (39) is arranged above the rear end of the frame (1), and the screening device (39) can slide back and forth to screen the legume crops and convey the legume crops downwards; the cleaning device (40) is arranged on the frame (1), the rear end of the cleaning device (40) is positioned in the screening device (39), the front end of the cleaning device extends forwards along the frame (1) to receive and convey the bean crops conveyed downwards by the screening device (39) forwards, and the bean crops are cleaned in the process of the forward conveying; the drying device (41) is arranged on the front side of the rack (1), and an inlet of the drying device (41) is connected with the front end of the cleaning device (40) to receive the legume crops cleaned by the cleaning device (40), dry the legume crops after cleaning and output forwards; the driving motor (2) is fixed on the rear side of the rack (1) and is respectively connected with and drives the screening device (39) and the cleaning device (40).

2. A bean washing and sand removing all-in-one machine according to claim 1, characterized in that the screening device (39) comprises a base (3), a screening box (4) and a crank (5); the base (3) is of a frame structure and is upwards fixed at the rear end of the rack (1), and a rolling groove (6) is formed in the top of the base (3) along the front-back direction; the screening box (4) is of a box body structure with an upward opening, and the bottom of the screening box is provided with a detachable screening plate with a mesh structure; the lower side of the screening box (4) is rotatably provided with a roller, and the roller can be arranged in the rolling groove (6) in a rolling way;

connecting rods (7) extending outwards are respectively fixed on two sides of the screening box (4); the cranks (5) and the connecting rods (7) are arranged in a one-to-one correspondence manner, one ends of the cranks (5) are rotatably fixed on the base (3) and correspond to the positions below the corresponding connecting rods (7), and the other ends of the cranks are connected with the corresponding connecting rods (7) through pushing mechanisms; driving motor (2) are connected and drive crank (5) rotate, and then realize screening case (4) is reciprocating slide in order to realize the screening to the leguminous crop.

3. A bean washing and sand removing integrated machine as claimed in claim 2, wherein the pushing mechanism comprises a sliding rod (8), a guide rail (9) and a sliding block (10); the sliding rod (8) is arranged on the outer side of the base (3) in a front-back sliding manner and corresponds to the position of the corresponding crank (5); the guide rail (9) is of an arc strip-shaped structure which is vertically arranged in the radial direction and is fixed in the middle of the sliding rod (8), and the upper end of the guide rail (9) is connected with the corresponding connecting rod (7); an arc-shaped guide groove (11) is arranged in the guide rail (9), and the sliding block (10) can be slidably arranged in the guide groove (11) and is connected with the other end of the crank (5).

4. A bean washing and sand removing integrated machine as claimed in claim 2, characterized in that a first rotating shaft (12) and a second rotating shaft (13) are respectively rotatably arranged at the rear side of the frame (1); the output of driving motor (2) is connected through first belt (14) linkage the one end of first pivot (12), the first pivot (12) other end is connected through second belt (15) linkage the middle part of second pivot (13), the both ends of second pivot (13) are connected and the drive is corresponding through third belt (16) respectively crank (5) rotate.

5. A bean washing and sand removing integrated machine as claimed in claim 2, characterized in that the cleaning device (40) comprises a conveyor belt (17), a water tank (18), a water pipe (19), a water pump (20), a plurality of spray heads (21) and a plurality of supporting rollers (22); the supporting rollers (22) are respectively and rotatably arranged on the rack (1) along the front and back directions; the conveyor belt (17) is provided with drain holes which are sleeved on the supporting roller (22) and circularly move back and forth along with the rotation of the supporting roller (22), the rear end of the conveyor belt (17) is positioned in the base (3) and corresponds to the lower part of the screening box (4), and a material selecting hopper (23) is fixed between the base (3) and the rear end of the conveyor belt (17) corresponding to the screening box (4); the water tank (18) is fixed on the rack (1) and corresponds to the lower part of the conveyor belt (17), and the opening of the water tank is arranged upwards; a filter plate is arranged in the water tank (18), and a water outlet (24) is arranged on the side part of the filter plate; the spray heads (21) are distributed above the conveyor belt (17), and the water pump (20) is fixed on the rack (1) and communicates the water tank (18) with the spray heads (21) through the water pipes (19);

the supporting roller (22) at the forefront is a positioning roller (25), and a tensioning mechanism for adjusting the position of the positioning roller (25) back and forth to adjust the tightness of the conveyor belt (17) is arranged at the position, corresponding to the positioning roller (25), on the rack (1);

the output end of the driving motor (2) is provided with a first chain wheel, the supporting roller (22) which is positioned at the rearmost part is provided with a second chain wheel, and the first chain wheel is connected with the second chain wheel through a chain (26).

6. A bean washing and sand removing all-in-one machine according to claim 5, characterized in that the tensioning mechanism comprises a slide (27) and a bolt (28); the sliding seats (27) are slidably mounted on the front two sides of the rack (1) and correspond to the positions of the positioning rollers (25), and the positioning rollers (25) are rotatably mounted on the sliding seats (27); one end of the bolt (28) is connected with the front part of the sliding seat (27), and the other end of the bolt extends forwards and penetrates through the side wall of the front end of the rack (1); and a nut (29) for adjusting the position of the sliding seat (27) back and forth is arranged on the bolt (28).

7. A bean washing and sand removing integrated machine as claimed in claim 5, characterized in that the drying device (41) comprises an auxiliary feeding box (30), a material guide plate (31) and a material guide pipe (32); the auxiliary feeding box (30) is fixed on the front side of the rack (1), and the rear end of the auxiliary feeding box (30) is high and the front end of the auxiliary feeding box is arranged at the bottom; the rear end of the material guide plate (31) is fixed on the rack (1) and corresponds to the lower part of the rear end of the conveyor belt (17), the front end of the material guide plate extends downwards in an inclined mode and then is connected with an inlet at the rear end of the auxiliary feeding box (30) and conveys the cleaned bean crops into the auxiliary feeding box (30); the material guide pipe (32) is fixed on the front side of the auxiliary material feeding box (30), the rear end of the material guide pipe (32) is lower than the front end of the auxiliary material feeding box, an outlet at the front end of the auxiliary material feeding box (30) is connected with an inlet at the rear end of the material guide pipe (32) so as to convey cleaned beans forward into the material guide pipe (32) for draining, and a water outlet (33) for draining the drained beans is arranged at the bottom of the rear end of the material guide pipe (32); an electric heating wire (34) for heating and drying the bean crops after draining is arranged in the side wall of the material guide pipe (32), a discharge hole (35) for discharging the dried bean crops is arranged at the bottom of the front end of the material guide pipe, and a feeding mechanism for conveying the bean crops after draining forwards is arranged in the material guide pipe (32).

8. A bean washing and sand removing integrated machine as claimed in claim 7, wherein a water strainer (43) is arranged at the inner top of the water outlet (33), and a steam outlet (42) is arranged on each of the material guide pipe (32) and the auxiliary feeding box (30).

9. A bean washing and sand removing integrated machine as claimed in claim 7, wherein a cavity is arranged in the side wall of the material guiding pipe (32), and the electric heating wire (34) is positioned in the cavity.

10. An integrated bean and sand washing machine according to any one of claims 7 to 9, wherein the feeding mechanism comprises a driving shaft (36) and a helical blade (37); the driving shaft (36) is rotatably arranged in the guide pipe (32), and one end of the driving shaft (36) extends out of the guide pipe (32); a feeding motor (38) is arranged outside the material guide pipe (32), and the output end of the feeding motor (38) is in linkage connection with one end of the driving shaft (36); the helical blade (37) is positioned in the guide pipe (32) and fixed on the driving shaft (36) and conveys the bean crops after being drained forwards along with the rotation of the driving shaft (36).