CN212856502U - Automatic grain sieving equipment - Google Patents

Abstract

The utility model discloses an automatic grain sieving device, which comprises a frame and a primary sieve collecting hopper which is arranged on the frame from top to bottom in sequence and used for primary sieving and collecting grains; the discharging speed adjusting device corresponds to the bottom outlet of the primary screening collecting hopper and is used for plugging or partially plugging the bottom outlet so as to adjust the discharging speed; the vibrating discharge screen is used for discharging the falling grains onto the truck after secondary screening or directly discharging the grains onto the truck without secondary screening; a sundry collecting hopper for collecting the falling sundry materials during secondary sieving; a spiral material pumping conveyor for discharging the sundries and a traction walking device for moving. The utility model discloses compact structure integrates the degree height, collects blowing-screening-loading-garbage collection function as an organic whole, has improved operating efficiency and screening effect.

Description

Automatic grain sieving equipment

Technical Field

The utility model belongs to the technical field of agricultural machine, especially, relate to an automatic equipment that sieves of grain.

Background

At present, impurities such as skin and stalk, sand grains and the like are often doped in corn after the corn is harvested and threshed, and the overall quality of the corn is affected. The existing screening process comprises the following steps: a door machine, an overhead hopper, a grain sieve, a belt conveyor and a transport vehicle; the process needs a plurality of scattered devices to finish work division, has poor integration and large occupied space; in the operation process, operation personnel are needed in the steps of operating the discharge hole of the overhead funnel, cleaning undersize, operating the belt conveyor and the like, 4 people are needed to maintain normal operation, and a large amount of labor cost is consumed; in addition, the operation process has more links, is low in dispersion and screening efficiency, has high dependence on the belt conveyor, is known to have high failure rate of the belt conveyor, and stops production once the belt conveyor fails, so that the production efficiency and the stability cannot be guaranteed; moreover, the discharging speed in the operation process is controlled manually by manually drawing the discharging plugboard, and when grains with high impurity rate are encountered, the size of the discharging hole is difficult to control, so that the quality of each vehicle is uneven, and the screening quality of the grains is seriously influenced.

Therefore, an improvement is urgently needed, the use of the existing belt conveyor is abandoned, and the automatic grain sieving equipment which is high in integration degree, compact in structure, integrated with functions of discharging, screening, loading and waste collection and good in operation efficiency and screening effect is researched and developed.

SUMMERY OF THE UTILITY MODEL

Aiming at overcoming the defects existing in the prior art, the utility model provides an automatic grain sieving device which has compact structure and high integration degree, integrates the functions of discharging, screening, loading and waste collection, and improves the operation efficiency and the screening effect.

The utility model provides a technical scheme that above-mentioned technical problem adopted is: an automatic grain sieving device, comprising:

a frame;

the primary screening and collecting hopper is arranged on the rack and is used for primary screening and collecting grains;

the discharging speed adjusting device is arranged on the rack, corresponds to a bottom outlet of the primary screening collecting hopper and is used for plugging or partially plugging the bottom outlet so as to adjust the discharging speed;

the vibrating discharge screen is obliquely arranged on the rack and positioned below the primary screen collecting hopper and is used for discharging the falling grains onto a truck after secondary screening; or directly unloading the materials to a truck without secondary screening;

the impurity collecting hopper is arranged on the rack, is positioned below the vibrating discharge screen and is used for collecting impurities falling during secondary screening;

the spiral material pumping conveyor is arranged on the rack and positioned below the sundry material collecting hopper, and a feed inlet of the spiral material pumping conveyor is connected with a discharge outlet of the sundry material collecting hopper and used for discharging the sundry materials;

and the traction walking device is arranged on the rack and used for moving.

Further, the discharging speed adjusting device comprises a rotary actuator arranged on the rack and a hollow shaft pipe structure connected with a power output part of the rotary actuator; the hollow shaft pipe structure is matched with the bottom outlet; a plurality of through holes extending in the radial direction are formed in the hollow shaft pipe structure at intervals along the axial direction, and charging barrels are installed in the through holes;

the hollow shaft pipe structure is rotated, and when the charging barrel is communicated with the bottom outlet at different angles, charging at different speeds can be realized; when the discharging barrel is not communicated with the bottom outlet, the bottom outlet is blocked by the peripheral surface of the hollow shaft pipe structure, so that discharging is stopped.

Further, two bottom outlets of the primary screening aggregate bins are symmetrically arranged; the two discharging speed adjusting devices correspond to the two bottom outlets one by one;

the vibrating discharge screen is symmetrically provided with two vibrating discharge screens, and the two vibrating discharge screens correspond to the two bottom outlets respectively.

Furthermore, a lifting device used for adjusting the height of the discharge hole of the vibrating discharge screen is arranged on the rack.

Further, the vibrating discharge screen comprises a discharge screen body, a retractable discharge port arranged at one end of the discharge screen body, a connecting beam arranged at the other end of the discharge screen body and a vibrator arranged at the lower part of the discharge screen body;

the connecting beam is rotatably connected with the mounting seat on the rack, and the bottom of the discharging screen body close to the retractable discharge port is connected with the power output part of the lifting device.

Further, the discharging screen body is of a three-layer structure and comprises two side baffles which are oppositely arranged, and a screen plate, a color steel tile and arch-shaped dustproof cloth are sequentially arranged between the two side baffles from bottom to top;

a guide plate is movably mounted on the discharging screen body and can be selectively connected with the screen plate or the color steel tile; when the guide plate is connected with the sieve plate, the falling grains can be sieved for the second time; when the guide plate is connected with the color steel tile, the falling grains are not sieved for the second time.

Further, a cam driving vibration unit for driving the vibrating discharge screen to vibrate up and down is arranged on a power output part of the lifting device.

Further, miscellaneous material is collected the hopper and is hopper-shaped, the vibrator is installed to the outer wall that miscellaneous material was collected the hopper, the inner wall that miscellaneous material was collected the hopper is provided with the ascending stair that are used for making things convenient for the workman to clear up miscellaneous material, the observation hole of useful ring flange shutoff is seted up to the lateral wall that miscellaneous material was collected the hopper, the observation hole is used for unloading miscellaneous material under the emergency situation.

Further, the primary screen collecting hopper comprises a hopper body in a funnel shape and a primary screen plate arranged at an inlet above the hopper body; the inner wall of collecting hopper body is provided with the ladder that is used for making things convenient for the workman to clear up miscellaneous material.

Furthermore, the traction walking device comprises a walking wheel arranged at the bottom of the rack and a traction frame arranged on one side of the rack;

the traction frame comprises a first connecting arm, a second connecting arm, a traction arm and a rectangular frame;

the utility model discloses a walking wheel, including frame, first linking arm, second linking arm, rectangular frame, first linking arm with the one end of second linking arm respectively with corresponding the steering column of walking wheel is articulated, first linking arm with the other end of second linking arm respectively with the articulated end of draft arm is articulated, the rectangular frame set up in on the strengthening rib roof beam of frame below, the draft end of draft arm with the help of the round pin axle with the rectangular frame is articulated and wears out outside the rectangular frame.

Due to the adoption of the technical scheme, the beneficial effects are as follows:

the utility model discloses an automatic grain sieving device, including the frame, from top to bottom set gradually in the frame the prescreen collecting hopper, blowing speed adjusting device, the vibration discharge sieve, miscellaneous material collecting hopper, spiral take out the material conveyer and draw running gear.

In order to ensure the quality of the screened grain and meet the requirements of customers, the discharging speed is adjusted in advance by using a discharging speed adjusting device. Grain is put into the primary screening aggregate bin by a door machine, the grain is primarily screened when passing through a feed inlet of the primary screening aggregate bin, large impurities such as cables, iron wires, bricks, woven bags, grain mildew blocks and the like are filtered, and then the grain enters the primary screening aggregate bin for temporary storage; the grains falling at a set speed through the bottom outlet of the primary screening collecting hopper fall onto the vibrating discharge screen which is inclined and positioned below the primary screening collecting hopper, the vibrating discharge screen can perform secondary screening on the grains to be loaded, the grains after the secondary screening fall onto a truck positioned below the discharge port of the vibrating discharge screen, the vibrating discharge screen can also perform no secondary screening on the grains to be loaded, and the grains which are not subjected to the secondary screening directly fall onto the truck; the operation efficiency is improved, and the screening requirements of different customers can be met. The miscellaneous materials during secondary screening fall to in the miscellaneous materials collection hopper, utilize the spiral to take out the miscellaneous materials discharge in the material collection hopper afterwards with the help of the direct loading of load wagon and carry away, further improved the operating efficiency, reduced operating personnel's intensity of labour.

In summary, the automatic grain sieving equipment of the utility model has the advantages of vertical arrangement, compact structure and small occupied area; and the functions of discharging, screening, loading and waste material collection are integrated; compared with the existing equipment, the high-integration-degree and reasonable layout saves the use of a belt conveyor, and reduces the failure rate; and the equipment shortens the screening process and improves the operation efficiency and the screening quality.

Drawings

Fig. 1 is a schematic structural view of the automatic grain sieving device of the present invention;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a simplified schematic diagram of the automatic grain sieving device of the present invention;

FIG. 4 is an enlarged view of the structure at A in FIG. 3;

FIG. 5 is a cross-sectional reference view showing different adjustment states of the discharge speed adjusting apparatus;

FIG. 6 is a schematic longitudinal sectional view of the discharge speed adjusting apparatus;

FIG. 7 is an enlarged view of the structure at B in FIG. 3;

FIG. 8 is a schematic diagram of the switching between sieving and non-sieving;

FIG. 9 is a top view of FIG. 1;

FIG. 10 is a schematic view showing the installation structure of the traction running gear;

in the figure: 1-frame, 11-column, 12-reinforcing bar beam, 14-climbing ladder, 15-guardrail, 16-maintenance platform, 17-mounting seat, 2-primary screen collecting hopper, 21-primary screen plate, 211-opening, 22-bottom outlet, 3-discharging speed adjusting device, 31-rotary actuator, 32-hollow shaft structure, 33-discharging barrel, 4-vibration discharging screen, 41-discharging screen body, 411-screen plate, 412-color steel tile, 413-arched dustproof cloth, 414-guide plate, 42-shrinkage discharging port, 5-sundry collecting hopper, 51-climbing ladder, 52-observation hole, 6-spiral pumping conveyor, 7-traction walking device, 71-walking wheel, 711-steering rod, 72-traction frame, 721-first connecting arm, 722-second connecting arm, 723-traction arm, 724-rectangular frame, 8-lifting device and 9-cam driving vibration unit.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the embodiments of the present invention are merely for convenience of simplifying the description, and should not be construed as limiting the present invention.

As shown collectively in fig. 1 to 3, the present embodiment discloses an automatic grain sieving apparatus; the device comprises a frame 1 (similar to an overhead working platform), and a primary screen collecting hopper 2, a discharging speed adjusting device 3, a vibrating discharging screen 4, a sundry collecting hopper 5, a spiral pumping conveyor 6 and a traction walking device 7 which are sequentially arranged on the frame 1 from top to bottom according to a process sequence.

The discharge speed is adjusted in advance by the discharge speed adjusting device 3. Grain is put into the primary screening aggregate bin 2 by a door machine, the grain is primarily screened when passing through the inlet of the primary screening aggregate bin 2, large impurities such as cables, iron wires, bricks, woven bags, grain mildew blocks and the like are filtered, and then the grain enters the primary screening aggregate bin 2 for temporary storage; grains falling at a set speed through the bottom outlet 22 of the primary screening collecting hopper 2 fall onto the vibrating discharge screen 4 which is inclined and positioned below the primary screening collecting hopper 2, the vibrating discharge screen 4 can perform secondary screening on grains to be loaded, the grains after the secondary screening fall onto a truck positioned below the discharge port of the vibrating discharge screen 4, the vibrating discharge screen 4 can also perform no secondary screening on the grains to be loaded, and grains which are not subjected to the secondary screening directly fall onto the truck; the operation efficiency is improved, and the screening requirements of different customers can be met. The miscellaneous materials during secondary screening fall to the miscellaneous materials collecting hopper 5 below the vibrating discharge screen 4, and then the spiral pumping conveyor 6 is utilized to discharge the miscellaneous materials in the miscellaneous materials collecting hopper, and the materials are directly loaded and transported away by means of a loading vehicle, so that the operation efficiency is further improved and the labor intensity of operators is reduced compared with the original mode of transporting the miscellaneous materials by using a small cart for operators.

Wherein, frame 1 includes a plurality of stands 11 and a plurality of strengthening rib roof beam 12 of being connected and transversely setting with stand 11. The top and the middle part of the frame 1 are both provided with an overhaul platform 16 and guardrails 15 are arranged around the overhaul platform 16.

The primary screen collecting hopper 2 comprises a hopper body with a funnel shape and a primary screen plate 21 (see fig. 9) arranged at an inlet above the hopper body, the inner wall of the hopper body is provided with a ladder for facilitating workers to clean sundries, and the primary screen plate 21 is provided with an opening 211 for people to pass through. The collecting hopper body of the primary screening collecting hopper 2 is arranged on the maintenance platform 16 at the top and used for primary screening and collecting grains. The inlet of the primary screening aggregate bin 2 is positioned above the top maintenance platform 16, and the bottom outlet 22 of the primary screening aggregate bin 2 is positioned below the top maintenance platform 16; the bottom of the primary screen collecting hopper 2 can be stabilized by means of a connecting beam. The side of the frame 1 is provided with a climbing ladder 14 for the operator to enter an access platform 16. The middle overhaul platform 16 is positioned below the primary screening aggregate bin 2 and above the impurity aggregate collection bin 5.

As shown collectively in fig. 4 to 6, the discharge speed adjusting device 3 corresponds to the bottom outlet 22 of the primary screening hopper 2, and is used for blocking or partially blocking the bottom outlet 22 to adjust the discharge speed. The concrete structure is as follows: comprises a rotary actuator 31 fixed on the frame 1 and a hollow shaft pipe structure 32 connected with the power output part of the rotary actuator 31; the hollow tubular structure 32 is adapted to the bottom outlet 22 (the diameter is consistent with the width of the bottom outlet 22, so as to facilitate plugging); a plurality of through holes extending in the radial direction are axially arranged on the hollow shaft pipe structure 32 at intervals; a charging barrel 33 is installed in the through hole.

Rotating the hollow shaft tube structure 32 by the rotary actuator 31; when the discharging cylinder 33 in the hollow shaft pipe structure 32 is communicated with the bottom outlet 22 at different angles, discharging at different speeds can be realized; when the discharging cylinder 33 in the hollow shaft pipe structure 32 is not communicated with the bottom outlet 22, the bottom outlet 22 is blocked by the peripheral surface of the hollow shaft pipe structure 32, and the discharging is stopped. The angle of the hollow shaft pipe structure 32 can be adjusted by the rotary actuator 31 according to different requirements, each ship of corn is screened by the first vehicle when arriving at port, after the angle is set and adjusted, the corn is opened to the set angle automatically every time until the angle is adjusted again, and the quality stability of the corn screened every time is ensured. When the charging barrel 33 in the hollow shaft tube structure 32 is vertically communicated with the bottom outlet 22, the charging at the maximum speed is realized, see fig. 5 (a); when the charging barrel 33 in the hollow shaft tube structure 32 is obliquely communicated with the bottom outlet 22, discharging is carried out at a certain speed state in the middle, and the discharging is shown in fig. 5 (b); when the discharge barrel 33 in the hollow shaft structure 32 is oriented horizontally, it is not in communication with the bottom outlet 22, and the material is discharged, see fig. 5 (c). The blanking speed is accurately controlled by setting the rotation angle of the hollow shaft pipe structure 32, and the requirements of different owners on the screening precision are met. The cylindrical discharging cylinder 33 is better, light and flexible to open and close on one hand; on the other hand, the closure is good, the corn leakage phenomenon cannot occur, and meanwhile, the blockage cannot easily occur.

The charging barrel 33 in the hollow shaft tube arrangement 32 can also be understood as a valve plate, the speed being set by adjusting the opening of the valve plate. Similarly, the bottom outlet 22 can be plugged and partially plugged by an electric push-pull baffle structure so as to adjust the discharging speed. Any mechanism capable of blocking or partially blocking the bottom outlet 22 for adjusting the discharge rate is intended to be included within the scope of the present application.

In this embodiment, in order to improve the working efficiency, two bottom outlets 22 of the primary screening aggregate bin 2 are symmetrically arranged; two discharging speed adjusting devices 2 are arranged, and the two discharging speed adjusting devices 2 correspond to the two bottom outlets 22 one by one; meanwhile, two vibrating discharging sieves 4 are symmetrically arranged and respectively correspond to the two bottom outlets 22; two lines can unload materials to two trucks at the same time, and the working efficiency is improved.

In the embodiment, as shown in fig. 3 and 7, the frame 1 is provided with a lifting device 8 for adjusting the height of the discharge port of the vibrating discharge screen 4, so as to provide loading services for trucks with different platform heights; the lifting device 8 can be a lifting platform, a spiral lifting mechanism or a vertical driving mechanism.

The vibrating discharge screen 4 includes a discharge screen body 41, and a retractable discharge port 42 (which can accurately position the vehicle and effectively prevent leakage) provided at one end of the discharge screen body 41. A connecting beam arranged at the other end of the discharge screen body 41 and a vibrator arranged at the lower part of the discharge screen body 41; the connecting beam is rotatably connected with the mounting seat 17 on the frame 1 by means of a connecting arm and a pin shaft (which is convenient for adjusting the height of the discharge hole), and the bottom of the discharge screen body 41 close to the retractable discharge hole 42 is connected with the power output part of the lifting device 8.

In this embodiment, as shown in fig. 3 and 8, the discharge screen body 41 has a three-layer structure, and includes two side baffles that are oppositely disposed, and a screen plate 411, a color steel tile 412 and an arched dust cloth 413 are sequentially disposed between the two side baffles from bottom to top; a guide plate 414 is movably mounted on the discharging screen body 41 (hinged to the discharging screen body 41 by a hinged seat), and the guide plate 414 can be selectively connected with the screen plate 411 or the color steel tile 412; when the guide plate 414 is connected with the sieve plate 411, the falling grains can be sieved for the second time; when the guide plate 414 is connected with the color steel tile 412, the falling grains are directly loaded without secondary screening. The requirements of different customers on the screening grade can be met. Meanwhile, the arched dustproof cloth 413 is in a sealing mode, dust raising in the operation process is greatly reduced, the operation environment of operators is improved, and the environment-friendly requirement is met better.

In this embodiment, in order to ensure the screening effect and simultaneously ensure that the meshes of the screen plate 411 are not blocked; performing double vibration on the discharge screen body 41; a cam driving vibration unit 9 for driving the vibrating discharging screen 4 to vibrate up and down is added in addition to the vibrator; the cam driving vibration unit 9 is arranged on the power output part of the lifting device 8; including the motor, the camshaft of being connected with the power take off part of motor, the bottom of vibratory discharge sieve 4 is provided with the articulated or is fixed with the push pedal, and the push pedal supports with the camshaft and leans on, utilizes the rotation characteristic of camshaft to make vibratory discharge sieve 4 vibrate from top to bottom.

In the embodiment, the sundry material collecting hopper 5 is funnel-shaped, the vibrator is arranged on the outer wall of the sundry material collecting hopper 5, and the climbing ladder 51 which is convenient for workers to clean sundry materials is arranged on the inner wall of the sundry material collecting hopper 5; an observation hole 52 sealed by a flange plate is formed in the side wall of the impurity collecting hopper 5, and the observation hole 52 is used for discharging impurities under emergency. The feed inlet of the spiral material pumping conveyor 6 is connected with the discharge outlet of the sundry material collecting hopper 5 and is used for discharging sundry materials. The spiral material pumping conveyor 6 comprises a shell, a rotating motor and a spiral conveying rod; the casing is cylindricly, and the rotating electrical machines is fixed in the one end of casing, and the other end of casing is located to spiral material pumping conveyer 6, and in the casing was located to the auger delivery pole, the one end fixed connection rotating electrical machines's of auger delivery pole output shaft, the other end rotation of auger delivery pole is connected in the casing.

In the present embodiment, as shown in fig. 2 and 10, the traction running gear 7 includes a running wheel 71 (four) provided at the bottom of the frame 1 and a traction frame 72 provided at one side of the frame 1 (the side opposite to the ascending ladder 14); the traction frame 72 comprises a first connecting arm 721, a second connecting arm 722, a traction arm 723 and a rectangular frame 724; one end of each of the first connecting arm 721 and the second connecting arm 722 is hinged to the steering rod 711 of the corresponding traveling wheel 71 below the machine frame 1, the other end of each of the first connecting arm 721 and the second connecting arm 722 is hinged to the other end of the corresponding traction arm 723, the rectangular frame 724 is disposed on the reinforcing rib 12 below the machine frame 1, and the traction end of the traction arm 723 is hinged to the rectangular frame 724 through a pin shaft and a shaft hole and penetrates out of the rectangular frame 724. When the equipment needs to be displaced, the traction frame 72 is dragged by the trailer to realize carrying and transferring.

All the operations can be realized by remote controller control, electric box control and manual control, the electric box control has priority to remote control, various operation modes ensure operation safety, and the manual operation mode can ensure operation without electrode limit, which is not described herein.

The utility model discloses an automatic equipment that sieves of grain when sieving the maize, average operating efficiency is 260 tons/hour, has turned over one time than former operation mode. The equipment is put into use, so that the operating efficiency is improved, the operating time of a single vehicle is shortened to be within twenty minutes, the vehicle pressing condition and the waiting time of a driver are reduced, the port time of each vehicle is reduced by two hours on average, the recognition of vast vehicle owners is obtained, and the conversion from 'no vehicle is willing to come' to 'the vehicle is robbed' is realized.

The fine control of screening effect is realized through controlling 33 angles (openness) of the charging barrel, different requirements of a goods owner on the quality of the corn are met, the customer satisfaction is improved, the attraction of customers is facilitated, the influence of corn operation is improved, and the assisted corn brand is built. Two lines only need 1 person remote control operation, and the operating personnel reduces, has reduced workman intensity of labour simultaneously, has improved the operation safety.

In conclusion, the utility model of the automatic grain sieving equipment has the advantages of up-down arrangement, compact structure and small occupied area; and the functions of discharging, screening, loading and waste material collection are integrated; compared with the existing equipment, the high-integration-degree and reasonable layout saves the use of a belt conveyor, and reduces the failure rate; and the equipment shortens the screening process and improves the operation efficiency and the screening quality.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The utility model provides an automatic equipment that sieves of grain which characterized in that includes:

a frame;

the primary screening and collecting hopper is arranged on the rack and is used for primary screening and collecting grains;

the discharging speed adjusting device is arranged on the rack, corresponds to a bottom outlet of the primary screening collecting hopper and is used for plugging or partially plugging the bottom outlet so as to adjust the discharging speed;

the vibrating discharge screen is obliquely arranged on the rack and positioned below the primary screen collecting hopper and is used for discharging the falling grains onto a truck after secondary screening; or directly unloading the materials to a truck without secondary screening;

the impurity collecting hopper is arranged on the rack, is positioned below the vibrating discharge screen and is used for collecting impurities falling during secondary screening;

the spiral material pumping conveyor is arranged on the rack and positioned below the sundry material collecting hopper, and a feed inlet of the spiral material pumping conveyor is connected with a discharge outlet of the sundry material collecting hopper and used for discharging the sundry materials;

and the traction walking device is arranged on the rack and used for moving.

2. The automatic grain sieving equipment according to claim 1, wherein the discharging speed adjusting device comprises a rotary actuator arranged on the frame and a hollow shaft pipe structure connected with a power output part of the rotary actuator; the hollow shaft pipe structure is matched with the bottom outlet; a plurality of through holes extending in the radial direction are formed in the hollow shaft pipe structure at intervals along the axial direction, and charging barrels are installed in the through holes;

the hollow shaft pipe structure is rotated, and when the charging barrel is communicated with the bottom outlet at different angles, charging at different speeds can be realized; when the discharging barrel is not communicated with the bottom outlet, the bottom outlet is blocked by the peripheral surface of the hollow shaft pipe structure, so that discharging is stopped.

3. The automatic grain screening device according to claim 2, wherein two bottom outlets of the primary screening aggregate hoppers are symmetrically arranged; the two discharging speed adjusting devices correspond to the two bottom outlets one by one;

the vibrating discharge screen is symmetrically provided with two vibrating discharge screens, and the two vibrating discharge screens correspond to the two bottom outlets respectively.

4. The automatic grain screening device of claim 1, wherein a lifting device for adjusting the height of the discharge port of the vibrating discharge screen is arranged on the frame.

5. The automatic grain screening device according to claim 4, wherein the vibrating discharge screen comprises a discharge screen body, a retractable discharge port arranged at one end of the discharge screen body, a connecting beam arranged at the other end of the discharge screen body and a vibrator arranged at the lower part of the discharge screen body;

the connecting beam is rotatably connected with the mounting seat on the rack, and the bottom of the discharging screen body close to the retractable discharge port is connected with the power output part of the lifting device.

6. The automatic grain sieving equipment according to claim 5, wherein the discharging sieve body is of a three-layer structure and comprises two side baffles which are oppositely arranged, and a sieve plate, a color steel tile and an arch-shaped dustproof cloth are sequentially arranged between the two side baffles from bottom to top;

a guide plate is movably mounted on the discharging screen body and can be selectively connected with the screen plate or the color steel tile; when the guide plate is connected with the sieve plate, the falling grains can be sieved for the second time; when the guide plate is connected with the color steel tile, the falling grains are not sieved for the second time.

7. The automatic grain sieving equipment of claim 5, wherein the power output part of the lifting device is provided with a cam driving vibration unit for driving the vibrating discharge sieve to vibrate up and down.

8. The automatic grain screening device according to claim 1, wherein the miscellaneous material collecting hopper is funnel-shaped, the vibrator is mounted on the outer wall of the miscellaneous material collecting hopper, the ladder for facilitating workers to clean the miscellaneous materials is arranged on the inner wall of the miscellaneous material collecting hopper, the observation hole plugged by the flange plate is formed in the side wall of the miscellaneous material collecting hopper, and the observation hole is used for discharging the miscellaneous materials under emergency conditions.

9. The automatic grain screening device according to claim 1, wherein the primary screening hopper comprises a hopper body in a funnel shape, and a primary screen plate arranged at an inlet above the hopper body; the inner wall of collecting hopper body is provided with the ladder that is used for making things convenient for the workman to clear up miscellaneous material.

10. The automatic grain sieving equipment according to claim 1, wherein the traction walking device comprises a walking wheel arranged at the bottom of the frame and a traction frame arranged at one side of the frame;

the traction frame comprises a first connecting arm, a second connecting arm, a traction arm and a rectangular frame;

the utility model discloses a walking wheel, including frame, first linking arm, second linking arm, rectangular frame, first linking arm with the one end of second linking arm respectively with corresponding the steering column of walking wheel is articulated, first linking arm with the other end of second linking arm respectively with the articulated end of draft arm is articulated, the rectangular frame set up in on the strengthening rib roof beam of frame below, the draft end of draft arm with the help of the round pin axle with the rectangular frame is articulated and wears out outside the rectangular frame.

Images