CN112371501A

CN112371501A - Anti-adhesion grain screening equipment

Info

Publication number: CN112371501A
Application number: CN202011141584.6A
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2021-02-19

Abstract

The invention provides anti-adhesion grain screening equipment, and relates to the field of grain screening. A plurality of first springs which are uniformly distributed are arranged between a connecting rod and a blanking shovel, a vibration assembly for enabling the first springs to deform is arranged between the connecting rod and the blanking shovel, a plurality of [ -shaped collision rods are annularly arranged on a vibration piece, gears are arranged at the end parts of the vibration piece, all the gears are meshed with the same rack below the vibration piece, and the racks are fixedly connected with an electric push rod so that the racks can linearly reciprocate when the electric push rod stretches; and a weight sensing element for supporting the first spring is padded at the bottom end of the first spring, and when the weight sensing element senses that the weight of the material receiving groove reaches a set value, a controller connected with the weight sensing element controls the electric push rod to do telescopic motion. The grain conveying device can shake the grains adhered to the blanking shovel down, so that the possibility of blockage of the blanking shovel is reduced.

Description

Anti-adhesion grain screening equipment

Technical Field

The invention relates to the field of grain screening, in particular to anti-adhesion grain screening equipment.

Background

With the development of agricultural modernization technology, many crops are harvested and packaged by large-scale equipment, in the process, more impurities such as soil, gravels and the like can inevitably enter grains, and if the grains and the impurities are not separated, the product quality can be seriously influenced.

At present, a primary screening machine is usually adopted in the market to screen and collect grains so as to facilitate transportation, and impurities in the grains can be well separated from the impurities. In-process that uses the primary sifter to filter grain, the grain of screening need be derived through the unloading shovel, and for the convenience unloading, the unloading shovel generally can and the certain angle of slope between the ground. If the screened grains are not dried in the sun, the grains are likely to be stuck on the blanking shovel in the screening and blanking process, so that the blanking shovel is blocked, and a hand-digging mode is adopted when the jam is observed manually, so that the screening and blanking device needs a specially-assigned person for charge, is not necessary, is inconvenient and is not suitable.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides anti-adhesion grain screening equipment, which solves the problem that grains need to be dredged manually to flow continuously and smoothly in the screening and blanking process because the grains are adhered to a blanking shovel if the screened grains are not dried in the sun.

In order to achieve the purpose, the invention provides the following technical scheme: an anti-adhesion grain screening device comprises a support, wherein a primary screening machine is installed at the top end of the support, an inclined blanking shovel which is located below a discharge port of the primary screening machine is arranged on the support, horizontal connecting rods which are located below the blanking shovel are symmetrically and fixedly installed on the support, a plurality of first springs which are uniformly distributed are installed between the connecting rods and the blanking shovel, a vibration assembly used for enabling the first springs to deform is arranged between the connecting rods and the blanking shovel, and the blanking shovel is supported through the first springs and the connecting rods; the vibrating component comprises a plurality of vibrating pieces arranged below the blanking shovel, the vibrating pieces are annularly provided with a plurality of [ -shaped collision rods, gears are arranged at the end parts of the vibrating pieces, all the gears are meshed with the same rack below the vibrating pieces, the rack is fixedly connected with the electric push rod, so that the rack linearly reciprocates when the electric push rod stretches, and the collision rods on all the vibrating pieces intermittently collide with the bottom surface of the blanking shovel; and a weight sensing element for supporting the first spring is padded at the bottom end of the first spring, and when the weight sensing element senses that the weight of the material receiving groove reaches a set value, a controller connected with the weight sensing element controls the electric push rod to do telescopic motion.

Compared with the prior art, the invention has the following beneficial effects: according to the automatic grain stacking device, all vibrating pieces are driven by one rack to intermittently collide the bottom of the blanking shovel and shake under the action of the first supporting spring, grains on the blanking shovel are shaken out of an adhesion state, the grains are prevented from being adhered, if the material receiving shovel is blocked and cannot smoothly slide out of the grains for transportation, the grains on the material receiving shovel are more and more heavy, when the set weight is reached, the weight sensing element is matched with the controller, the electric push rod is made to move in a telescopic mode, the material receiving shovel is shaken, the grains on the material receiving shovel are assisted to smoothly fall down, whether the material receiving shovel is jammed and stacked or not is automatically monitored, grain stacks are automatically shaken in time, and the grains are recovered to be continuously and smoothly circulated.

Drawings

FIG. 1 is a schematic view of the external structure of the present invention;

FIG. 2 is a schematic front view of the structure of FIG. 1;

FIG. 3 is a side view of the structure of FIG. 1;

FIG. 4 is a schematic diagram of the main structure of the present invention;

FIG. 5 is an enlarged view of the structure of FIG. 1 at A according to the present invention;

FIG. 6 is a schematic view of a connection structure of a fixing block and a bracket;

FIG. 7 is a schematic view of a connection structure of the blanking device and the refining device;

FIG. 8 is a cross-sectional view taken at C-C of FIG. 6;

FIG. 9 is a schematic view of an elastic extension pole;

FIG. 10 is a schematic view showing a case where grains are deposited around the inner wall of a rectangular parallelepiped chamber to which a sensor is attached.

In the above drawings: 1. a support; 2. a primary screening machine; 3. a blanking shovel; 4. a connecting rod; 5. a first spring; 6. a vibrator; 7. a material receiving box; 8. a base plate; 9. a bottom wheel; 10. a push handle; 11. a cover plate; 12. a handle; 13. a guide groove; 14. a guide block; 15. fixing the rod; 16. a second spring; 17. a fixed block; 18. fixing grooves; 19. a slot; 20. a blanking device; 21. a material receiving bin; 22. an impeller member; 23. gathering a bin; 24. a discharging bin; 25. a conical cover; 26. a sensor; 27. A protective cover; 28. a blower; 29. a shunt tube; 30. a dust collecting plate; 31. a slide bar; 32. a fixed tube; 33. a pressure-bearing spring; 34. a spreader cone; 35. a recovery pipe; 36. a conveying trough; 37. a delivery shaft; 38. a weight sensing element; 39. a vibrating member; 40. a gear; 41. a rack; 42. an electric push rod.

Detailed Description

The technical solution of the present invention is further explained with reference to the drawings and the embodiments.

In order to make the technical means, the creation characteristics, the achievement purposes and the functions of the invention clearer and easier to understand, the technical scheme of the invention is described in detail below. It should be understood by those skilled in the art that the following examples are illustrative of some, but not all, specific embodiments of the invention and therefore the scope of the invention is not limited thereto.

Specifically, the structure of the anti-adhesion grain screening device is shown in figures 1-3, and comprises a support 1 for supporting, a primary screening machine 2 for screening grains is installed at the top end of the support 1, a blanking shovel 3 which is inclined and is positioned below a discharge port of the primary screening machine 2 is arranged on the support 1, a horizontal connecting rod 4 which is positioned below the blanking shovel 3 is also symmetrically and fixedly installed on the support 1, a plurality of first springs 5 which are uniformly distributed are installed between the connecting rod 4 and the blanking shovel 3, it is worth mentioning that the blanking shovel 3 supports the blanking shovel through the first springs 5 and the connecting rod 4, the support 1 does not support the blanking shovel 3, in addition, a vibration component for deforming the first springs 5 is arranged between the connecting rod 4 and the blanking shovel 3, the first springs 5 are deformed through the vibration component, and thus the blanking shovel 3 supported by the first springs 5 can vibrate, shaking the stuck grains. In this embodiment, as shown in fig. 4, a plurality of vibrating members 39 are further arranged below the material receiving shovel 3, a plurality of collision rods in the shape of [ "are annularly arranged on the vibrating members 39, and the middle vertical rod section in the shape of [" of the collision rods is parallel to the width direction of the material receiving shovel and can contact with the bottom of the material receiving shovel during operation. More specifically, all gears 40 are installed to the tip of all vibrating parts 39, and all gears 40 all mesh with the same rack 41 of its below, rack 41 and electric push rod 42 rigid coupling to rack 41 straight reciprocating motion when making electric push rod 42 flexible, and collision pole on all vibrating parts 39 with blanking shovel 3 bottom surface intermittent type nature collision, above-mentioned collision pole is intermittent type nature with connect the contact of material shovel bottom surface and raise the material shovel promptly for the first spring 5 that originally sets up is stretched, and after the contact at every turn, connect the material shovel to move down rapidly again, thereby makes the material shovel rock one by one, makes the grain of adhesion tremble up, so that follow-up whereabouts goes out. Meanwhile, in order to realize that the vibrating member 39 can be automatically opened when needed, a weight sensing element 38 supporting the first spring 5 is specially padded at the bottom end of the first spring 5, and when the weight sensing element 38 senses that the weight of the receiving tank reaches a set value, a controller connected with the weight sensing element 38 controls the electric push rod 42 to do telescopic motion. When using, connect the material shovel if take place to block up, can not smooth roll-off grain transports, then connect the grain on the material shovel more and more, and is more and more heavy, when reaching and setting for weight, weight sensing element 38 and controller cooperation make the flexible removal of electric push rod 42, realize to rocking of material shovel, supplementary material shovel's the smooth whereabouts of the grain of connecing.

Based on the above structure, the present embodiment can also preferably be matched, as shown in fig. 1, a limiting assembly for limiting the blanking shovel 3 in the vertical direction is arranged between the bracket 1 and the blanking shovel 3. Spacing subassembly is including seting up at support 1 inboard and for the guide way 13 of vertical direction, and installs a plurality ofly respectively with the guide block 14 that 13 sliding fit of corresponding guide ways are connected in the outside of unloading shovel 3, through such setting, when making unloading shovel 3 driven the vibration by first spring 5, the mode of vibration about its vibration direction is. For the convenience is collected the storage to the grain of screening, as shown in fig. 1, be provided with the top in the below of the bottom feed opening of unloading shovel 3 and have open-ended receipts workbin 7, receive the bottom of workbin 7 and be connected with bottom plate 8 that plays support and removal effect, because the mode of vibration direction of unloading shovel 3 is up-down vibration, so can not appear spilling the condition around receiving workbin 7 from the grain that unloading shovel 3 derived. Referring to fig. 6 together, the material receiving box 7 is fixedly connected with a fixing block 17, a slot 19 is formed in the support 1, when the material receiving box 7 is close to the support 1, the fixing block 17 can be inserted into the slot 19, a fixing rod 15 capable of moving up and down is arranged in the support 1, a fixing groove 18 is formed in the fixing block 17, when the fixing rod 15 moves downwards, the fixing rod 17 can be inserted into the fixing groove 18, and a second spring 16 is sleeved on the fixing rod 15. When the material receiving box is used, the material receiving box 7 needs to receive materials and moves towards the support 1, when the preset position is reached, the fixing block 17 can be inserted into the slot 19, meanwhile, when the materials fall into the blanking shovel 3, the blanking shovel 3 can move downwards under the action of pressure, the guide block 14 can move downwards along with the material receiving box and presses the fixing rod 15, so that the fixing rod 15 is inserted into the fixing slot 18, the position of the material receiving box 7 is fixed, and the material receiving position is kept unchanged all the time. When the unloading is finished, there is not the material on the unloading shovel 3, and at this moment, first spring 5 upwards jacks up unloading shovel 3 to make guide block 14 and dead lever 15 separate, second spring 16 also upwards jacks up dead lever 15 thereupon this moment, thereby makes dead lever 15 and fixed slot 18 separate, receives workbin 7 this moment promptly and can be pulled away, thereby realizes the installation and the separation of quick detach formula receipts workbin 7.

As an implementation detail, as shown in fig. 2, in some embodiments, the vibration assembly includes a vibrator 6 mounted at the bottom end of the blanking shovel 3, the vibrator 6 acts on the blanking shovel 3, but since the blanking shovel 3 is connected with the first spring 5, the blanking shovel 3 and the first spring 5 are in a synchronous dependency relationship because the vibrator 6 drives the blanking shovel 3 and the first spring 5 to vibrate synchronously, because if the blanking shovel 3 is fixed with the bracket 1, the amplitude of vibration generated by the blanking shovel 3 is not enough to shake the bonded grains even if the vibrator 6 exists, and besides, the vibrator 6 is located between the first springs 5 to uniformly vibrate the blanking shovel 3.

The movable structure of the bottom plate 8 is shown in fig. 1, the bottom end of the bottom plate 8 is hinged with a plurality of evenly distributed bottom wheels 9 through a rotating shaft, meanwhile, in order to avoid the bottom plate 8 from moving accidentally, each bottom wheel 9 is a universal self-locking wheel, and a push handle 10 used for conveniently pushing the bottom plate 8 and the material receiving box 7 is installed on the bottom plate 8.

In addition, other impurities may enter the feed inlet of the primary screening machine 2 when the primary screening machine is not used, and in order to avoid this, as shown in fig. 1, an openable cover plate 11 is hinged to the feed inlet of the primary screening machine 2 through a hinge, and a handle 12 is installed at the top end of the cover plate 11.

During specific manufacturing, the fixing rod 15 can be processed into a cylindrical rod, the middle of the cylindrical rod is provided with a shaft shoulder, the shaft shoulder is located in the inner expanding cavity of the support 1, and two ends of the second spring 16 are respectively contacted with the end face of the shaft shoulder and the bottom surface of the inner expanding cavity. The lower section of the cylindrical rod is a conical rod section, the fixing groove 18 is a conical hole with a blind hole structure, the large end of the conical hole structure of the fixing groove 18 is a hole opening end of the blind hole, and the conical rod section is in socket fit with the conical hole so as to improve stability and quickness in connection.

Preferably, as shown in fig. 1, a blanking device 20 is further connected below the primary screening machine 2, and referring to fig. 7-8 together, the blanking device 20 includes a rectangular receiving bin 21, a cylindrical impeller member 22 is installed in the receiving bin 21, front and back end faces of the impeller member 22 are in smooth fit with two inner surfaces of the receiving bin 21, the rectangular impeller of the impeller member 22 can be smoothly connected with an inner surface of the receiving bin 21 when rotating, so that when rims of two adjacent impellers are simultaneously in contact with the inner surface of the same receiving bin 21, the two adjacent impellers and the mandrels of the impeller member 22 and the inner surface of the receiving bin 21 together enclose a wedge-shaped accommodating cavity, and the accommodating cavity is used for accommodating a rated amount of grains. Meanwhile, a trapezoidal material collecting bin 23 is connected below the material collecting bin 21, a small port of the material collecting bin 23 faces downwards and is in butt joint with a flat rectangular material discharging bin 24, and a purging device used for purging dust in grains is arranged on one side below the material discharging bin 24 so as to horizontally purge impurities such as dust in falling grains. The volume that holds the chamber equals go out the volume of feed bin 24, and the platykurtic that goes out feed bin 24 must make the grain in the feed bin 24 can freely scatter away and not jam in a feed bin 24, above to go out feed bin 24 and hold the structure of chamber and prescribe a limit to, it is comparatively important, if the platykurtic undersize that goes out feed bin 24, then one holds the once grain that falls in chamber and gathers in feed bin under most likely, cause the jam, unable normal continuation whereabouts, and if too big, the grain curtain that the grain whereabouts formed is crossed the back, then be unfavorable for follow-up air-blowing screening. When the material dropping device 20 is used, the screened grains enter the material receiving bin 21, when the impeller part 22 rotates, the grains are transferred to the material collecting bin 23 below the impeller part 22 through the containing cavity, all the grains can quickly and intensively fall to the bottom of the material collecting bin 23 and enter the material discharging bin 24 in view of the trapezoid structure of the material collecting bin 23, the material discharging bin 24 is a cavity matched with the containing cavity and is of a flat nozzle structure, the thickness of the material discharging bin can enable the grains falling into one containing cavity to be dispersed and filled in the material discharging bin 24, so that the grains falling off after one time of transferring in one containing cavity can be fully and uniformly scattered, the grains cannot be stuck due to excessive grains and cannot fall too intensively to form a conical volcanic grain pile, the grains are excessively gathered to be unfavorable for subsequent automatic collapse and transportation, and the subsequent grains are cleaned by wind, and meanwhile, the subsequent grains are cleaned of dust impurities by wind, the dust is more thoroughly floated out.

As a further preferred embodiment, in order to monitor that the impeller member 22 is always submerged in the grain, and to ensure that each of the above-mentioned containing cavities formed by rotation is filled with grain as much as possible, so as to perfectly match the grain falling from the bin 24, as shown in fig. 7, in this embodiment, an inverted conical cover 25 is very skillfully butted on the upper end of the receiving bin 21, and a sensor 26 is also arranged in the middle of the conical cover 25 in a suspended manner, so that the conical cover 25 is inverted with its large end facing downward, mainly in order to ensure that no excessive grain layer is accumulated on the inner wall of the conical cover 25, so as to confirm that the periphery of the sensor 26 is actually in a blank state, that is, there is no grain pressure in the surrounding horizontal plane, which indicates that the grain has actually fallen to the interface where the impeller member 22 is about to be exposed, and that the full transfer of the containing cavities can be ensured by supplementing grain; however, if a rectangular or cylindrical bin is directly used, it is inevitable that a certain amount of grain will be accumulated around the inner wall of the bin, but the middle of the bin is blank (as shown in fig. 10), which leads to inaccurate information of the grain falling interface detected by the sensor 26. In use, the sensor 26 can detect whether the conical cover 25 is filled with grain, and if no grain is detected, a signal is sent to the controller, so that the controller controls the impeller member 22 to stop rotating to replenish enough grain.

Specifically, for the above-mentioned blanking device 20, a stepping motor is installed outside the receiving bin 21, and a main shaft of the stepping motor is fixedly connected with an end of the core shaft so as to control a rotation speed of the impeller part 22, and an interval time step length of the above-mentioned containing cavity for transporting the grain to fall is properly arranged, so as to perfectly match the requirement of the whole operation process. In addition, the blade can be a rectangular blade-shaped structure, and one side edge of the blade, which is in contact with the inner surface of the material receiving bin 21, is a blade edge, so that grains can be better separated from the accommodating cavity, and meanwhile, the phenomenon that the edge of the blade affects the matching of the blade and the inner surface of the material receiving bin due to the grain being left is avoided. Furthermore, the cavity of holding is isosceles trapezoid or isosceles triangle's structure for the cross section to when holding the cavity and changeing to the opening under towards, comparatively thoroughly pour grain totally, this point also needs attention especially, and is comparatively important.

As another preferred embodiment, the present embodiment further includes a fine separator connected to the bottom outlet end of the primary screening machine 2 or the blanking device 20, and as shown in fig. 7, the fine separator includes a protective cover 27, a blower 28, a dust collecting plate 30, and a flow dividing pipe 29 from top to bottom, wherein the protective cover 27 is connected to the bottom outlet end of the primary screening machine 2 or the blanking device 20 to realize further screening and separation of the grains. Specifically, the size of the inner hole of the protection cover 27 is required to ensure that the grain falling from the blanking device 20 or the primary screening machine 2 does not touch the inner wall of the protection cover 27, so as to avoid the influence of the protection cover 27 on the grain falling, for example, if the protection cover 27 is too small, the grain curtain formed by the falling grain is compressed together, and the grain density is too large to influence the subsequent air blowing effect. That is: a blower 28 is installed on the outer side below the protective cover 27, and the blower 28 blows the grains falling out of the protective cover 27 in an inclined manner, so that the grains are given enough movement travel in the horizontal direction, the dust mixed with the grains is fully cleaned, and of course, the wind direction can be horizontally arranged, but the effect is not well arranged on the back. One end of the dust collecting plate 30 with a smooth upper surface is hinged on the opening edge of the upper port of the shunt pipe 29, and the other end extends out of the shunt pipe 29 and is supported by an elastic telescopic rod below the shunt pipe, so that in a non-working state, the dust collecting plate 30 is suspended on the upper port of the shunt pipe 29 in a cantilever type structure, and the elastic telescopic rod gradually inclines downwards in the dust and impurity accumulation process on the dust collecting plate 30 to enable dust and garbage to slide downwards. When using, the dust is blown down on receiving dirt board 30 in a large number, along with receiving dirt/rubbish more and more on the dirt board 30, receives dirt board 30 and also progressively moves down under the elastic telescopic rod supports for the dust descends gradually and goes out, and the accumulation is more, and the inclined arc degree is big under the dirt board, finally can be with the nearly vertical angle with the dust roll-off.

With reference to fig. 7, on the basis of the structure of the above fine separator, a diversion cone 34 is further arranged on one side of the diversion pipe 29, which is deviated to the dust receiving plate 30, the diversion cone 34 is vertically arranged in the diversion pipe 29 and divides the diversion pipe 29 into two mutually independent subspaces, and the top of the diversion cone 34 is of a knife-edge-shaped structure so as to divert the falling grains; the subspace adjacent to the dust collecting plate 30 is connected to the inlet of the primary screening machine 2 via a recovery duct 35, because the grains in this subspace are further swept in the direction of the wind, and to a certain extent, are more likely to be mixed with dust and other garbage, and are therefore discharged separately for circular screening, while the outlet of the other subspace is arranged opposite to the blanking shovel 3, so as to be collected and stored directly. Further, as shown in fig. 9, the elastic telescopic rod includes a fixed sleeve and a sliding rod 31, both of which are arc-shaped, and the arc-shaped circle centers of the fixed sleeve and the sliding rod are located at the hinge point of the dust collecting plate 30 on the port of the shunt tube 29, the fixed sleeve is fixed on the outer side wall of the shunt tube 29, one end of the sliding rod 31 is located in the fixed tube 32 in a sliding fit manner and is connected with an arc-shaped spring in the fixed tube 32, the free end of the sliding rod 31, which extends out of the fixed sleeve, is fixedly connected with a steel ball, and the steel ball and the bottom surface of the dust collecting plate 30 are kept in contact under the. Furthermore, the elastic telescopic rod is a pressure-bearing spring 33, one end of the pressure-bearing spring 33 is connected to the outer wall of the flow dividing pipe 29, and the other end of the pressure-bearing spring 33 is in contact with the bottom surface of the dust collecting plate 30. Further, the dust collecting device also comprises a conveying groove 36 which is obliquely arranged, a conveying shaft 37 is arranged in the conveying groove 36, the top end of the conveying groove 36 is connected with the outlet end of the dust collecting plate 30, and the bottom end of the conveying groove is connected with a drainage pipeline so as to discharge the slag. Further, the upper surface of the dust collecting plate 30 is an inclined surface and is inclined toward the lower part of the outer side of the shunt pipe 29, so that the dust and the garbage can be poured out more smoothly.

Finally, the above embodiments are only intended to illustrate the technical solution of the present invention and not to limit the same, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, which should be covered by the claims of the present invention.

Claims

1. The utility model provides an antiseized grain screening equipment, includes support (1), its characterized in that: the top end of the support (1) is provided with a primary screening machine (2), the support (1) is provided with an inclined blanking shovel (3) which is positioned below a discharge port of the primary screening machine (2), the support (1) is symmetrically and fixedly provided with a horizontal connecting rod (4) which is positioned below the blanking shovel (3), and a plurality of first springs (5) which are uniformly distributed are arranged between the connecting rod (4) and the blanking shovel (3);

a vibration assembly used for enabling the first spring (5) to deform is arranged between the connecting rod (4) and the blanking shovel (3), and the blanking shovel (3) is supported through the first spring (5) and the connecting rod (4);

the vibration assembly comprises a plurality of vibration parts (39) arranged below the blanking shovel, the vibration parts (39) are annularly provided with a plurality of collision rods in a [ -shape, gears (40) are installed at the end parts of the vibration parts (39), all the gears (40) are meshed with the same rack (41) below the vibration parts, the rack (41) is fixedly connected with an electric push rod (42), so that the rack (41) linearly reciprocates when the electric push rod (42) stretches out and draws back, and the collision rods on all the vibration parts (39) intermittently collide with the bottom surface of the blanking shovel;

a weight sensing element (38) supporting the first spring is padded at the bottom end of the first spring, and when the weight sensing element (38) senses that the weight of the material receiving tank reaches a set value, a controller connected with the weight sensing element (38) controls the electric push rod (42) to do telescopic motion.

2. The anti-adhesion grain screening device according to claim 1, wherein: the bottom of blanking shovel (3) feed opening's below is provided with the top and has open-ended receipts workbin (7), the bottom of receiving workbin (7) is connected with mobilizable bottom plate (8).

3. The anti-adhesion grain screening device according to claim 2, wherein: the bottom of the bottom plate (8) is hinged with a plurality of evenly distributed bottom wheels (9) through a rotating shaft.

4. The anti-adhesion grain screening device according to claim 3, wherein: each bottom wheel (9) is a universal self-locking wheel, a push handle (10) is installed on the bottom plate (8), and the push handle (10) is of an inverted U-shaped structure.

5. The anti-adhesion grain screening device according to claim 1, wherein: the feed inlet of primary screening machine (2) has apron (11) that can open through the hinge articulated, handle (12) are installed on the top of apron (11).

6. The anti-adhesion grain screening device according to claim 1, wherein: a limiting assembly used for limiting the blanking shovel (3) in the vertical direction is arranged between the support (1) and the blanking shovel (3).

7. The anti-adhesion grain screening device according to claim 6, wherein: spacing subassembly is including seting up guide way (13) that just is vertical direction in support (1) inboard, guide block (14) of being connected with guide way (13) sliding fit are installed in the outside of blanking shovel (3) to restriction blanking shovel (3) can only reciprocate in guide way (13).