A grain vibrating screening conveyor

Abstract

This invention discloses a grain vibrating screening and conveying machine, belonging to the field of grain conveying technology. It includes a screening box with a bottom support frame at its bottom, a blower located above the right side wall of the screening box, a feed hopper on the right side of the top surface of the screening box, and several vibrating screening components arranged inside the screening box. Several discharge ports are arranged on the bottom surface of the screening box. This invention achieves one-time grading and screening of large, medium, and small particles, as well as impurities, by arranging multiple vibrating screening components along the long side of the screening box and coordinating with horizontal airflow from the blower. Simultaneously, by utilizing the decreasing diameter of the screen holes along the airflow direction on the screening plate, and the irregular vibration generated by the impact of grain and the rebound of the torsion springs, smaller grain particles can quickly fall from the screen holes into their respective screening zones, effectively avoiding mixing of grains of different sizes and greatly improving screening quality and efficiency.

Description

Technical Field

[0001] This invention relates to the field of grain conveyor technology, specifically a grain vibrating screening conveyor. Background Technology

[0002] Grain screening and conveying equipment is a basic piece of equipment in the grain processing industry, and it is widely used in the cleaning, grading and impurity removal processes of various grain raw materials.

[0003] In existing technologies, grain screening and conveying equipment typically includes basic structures such as a screening box, a feeding device, a discharging device, and a vibrating screening component. A common implementation involves the grain raw material entering the screening box through the feeding device, moving along the screen surface under the vibration of the vibrating screening component, and sequentially passing through screens of different aperture sizes to achieve particle size classification.

[0004] However, existing technologies still have the following shortcomings: when grain raw materials pass through screens with different apertures in sequence, larger grain particles will clog the screens with smaller apertures, preventing the smaller grain particles from being completely screened out. These smaller grain particles are then carried away by the larger grain particles and screened out through the larger aperture screens. Cross-mixing between grains of different sizes is likely to occur, resulting in low screening efficiency and quality, which are difficult to improve further. Therefore, a grain vibrating screening conveyor is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a grain vibrating screening conveyor to solve the problem of low screening efficiency and screening quality caused by large grain particles clogging the small-aperture screens in the prior art, as mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a grain vibrating screening conveyor, comprising a screening box, a bottom support frame at the bottom end of the screening box, a blower above the right side wall of the screening box, a feed hopper at the right side of the top surface of the screening box, a plurality of vibrating screening components arranged inside the screening box, and a plurality of discharge ports arranged on the bottom surface of the screening box; It also includes a feeding conveyor and a discharging conveyor. The feeding conveyor is used to convey the grain raw materials into the feeding hopper, and the discharging conveyor is used to convey the large grain particles, medium grain particles, small grain particles and miscellaneous materials that have been screened by the vibrating screening component out of the bottom of the screening box. The vibrating screening assembly includes a fixed shaft located below the inner side wall of the screening box. The fixed shaft is rotatably connected to a sleeve. A screening plate is provided on the side wall of the sleeve. The screening plate includes a plurality of screen holes. Both ends of the sleeve are fixedly connected to ring blocks by torsion springs. The ring blocks are controllably rotatably connected to the inner side wall of the screening box. The diameter of the screen holes on several vibrating screening components decreases in the direction away from the blower; The vibrating screening assembly is located between two adjacent discharge ports.

[0007] Preferably, the vibrating screening assembly further includes an arc-shaped groove on the outer wall of the screening box, a telescopic rod is fixedly connected to the side wall of the ring block facing the arc-shaped groove, an L-shaped locking rod is fixedly connected to the outer end of the telescopic rod, and a number of locking slots are opened in a circular path on the outer wall of the screening box at the arc-shaped groove. The L-shaped locking rod extends into the locking slot after being compressed by the telescopic rod to restrict the rotation of the ring block.

[0008] Preferably, a dust removal component is provided above the left side wall of the screening box. The dust removal component includes an air outlet located above the left side wall of the screening box. A transition box is provided at the outer end of the air outlet on the left side wall of the screening box. The left side wall and right side wall of the transition box are connected. Several drainage holes are provided on the top surface of the transition box. A water storage tank is provided on the top surface of the transition box. The top surface and bottom surface of the water storage tank are connected.

[0009] Preferably, the dust removal assembly further includes a mesh bag disposed at the left end of the transition box for collecting flocculent dust.

[0010] Preferably, the left end of the transition box is provided with an annular groove, and the net bag is clamped in the annular groove by a rubber sleeve.

[0011] Preferably, an air inlet is provided on the upper right side wall of the screening box, and the blower is fixedly connected to the upper right side wall of the screening box by a triangular bracket. The blower blows air horizontally into the interior of the screening box through the air inlet.

[0012] Preferably, the bottom surface of the screening box is provided with a discharge pipe at the outer end of the discharge port, and the top and bottom surfaces of the discharge pipe are connected.

[0013] Preferably, the screening box has a feed inlet on the right side of its top surface, and the feed hopper is located at the outer end of the feed inlet.

[0014] Preferably, the water storage tank is convex in shape.

[0015] Preferably, the fixed shaft, sleeve, and ring block are arranged coaxially.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention utilizes multiple vibrating screening components arranged along the long side of the screening box, combined with horizontal airflow from a blower. It leverages the principle that particles of different masses have different impact points under the influence of airflow to achieve one-time grading and screening of large, medium, and small particles, as well as impurities. Simultaneously, the decreasing diameter of the screen holes along the airflow direction, along with the irregular vibrations generated by the impact of grains and the rebound of torsion springs, allows smaller grain particles to quickly fall from the screen holes into their respective screening zones, effectively preventing mixing of grains of different sizes and significantly improving screening quality and efficiency.

[0017] The vibrating screening assembly of this invention allows for adjustable and controllable tilt angles of the screening plate through the controllable rotation of the ring block, torsion spring, and screening plate. When the grain raw material changes or the user's screening needs change, the angle of the screening plate can be easily adjusted to change the range of each screening zone, thus flexibly responding to the screening requirements of different grain raw materials and significantly improving operational flexibility. Combined with structures such as the arc-shaped groove, telescopic rod, and L-shaped locking rod, users can quickly complete angle adjustment and locking, making operation simple and efficient.

[0018] This invention features a dust removal component installed on the upper left side wall of the screening box. Through the coordination of the transition box, water storage tank, and drainage hole, the air blown by the blower disperses the trickling water droplets into smaller particles. These particles combine with the flocculent dust, increasing their weight and accelerating their fall, effectively preventing the flocculent dust from drifting aimlessly and achieving excellent dust reduction. Furthermore, the mesh bag allows for rapid collection of flocculent dust, further cleaning the working environment. The structure is both ingenious and practical. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings. It is obvious that the drawings described below are merely some embodiments of the present invention, and other drawings can be obtained by those skilled in the art based on these drawings without any inventive effort. Wherein: Figure 1 This is a front view of the overall structure of the present invention; Figure 2 This is a side view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the screening box in this invention; Figure 4 This is a schematic diagram of the internal structure of the screening box in this invention; Figure 5 This is a cross-sectional view of the screening box in this invention; Figure 6 This is a schematic diagram of the structure of the vibrating screening component in this invention; Figure 7 This is a schematic diagram of the screening box from another perspective in this invention; Figure 8 for Figure 7 Enlarged diagram of point A in the middle.

[0020] In the diagram: 1. Screening box; 101. Bottom support frame; 102. Discharge port; 103. Feed port; 2. Feed hopper; 3. Feeding conveyor; 4. Discharge conveyor; 5. Blower; 501. Air inlet; 502. Triangular bracket; 6. Discharge pipe; 7. Dust removal assembly; 701. Air outlet; 702. Transition box; 703. Water storage tank; 704. Drain hole; 705. Annular groove; 706. Mesh bag; 707. Rubber sleeve; 8. Vibrating screening assembly; 801. Fixed shaft; 802. Sleeve; 803. Screening plate; 804. Torsion spring; 805. Ring block; 806. Telescopic rod; 807. L-shaped clamp; 808. Screen hole; 809. Arc-shaped groove; 810. Clamp. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0023] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0024] Reference Figure 1-8 As shown, the present invention provides a technical solution for a grain vibrating screening conveyor: A grain vibrating screening conveyor includes a screening box 1, a bottom support frame 101 at the bottom of the screening box 1, a blower 5 above the right side wall of the screening box 1, a feed hopper 2 on the right side of the top surface of the screening box 1, a plurality of vibrating screening components 8 arranged inside the screening box 1, and a plurality of discharge ports 102 arranged on the bottom surface of the screening box 1. It should be noted that the screening box 1 has a rectangular parallelepiped structure, with the vibrating screening components 8 arranged along the long side of the screening box 1, and the number of discharge ports 102 being one more than the number of vibrating screening components 8. The feed hopper 2 is connected to the interior of the screening box 1, and the blower 5 is also connected to the interior of the screening box 1, used to horizontally blow air into the screening box 1. The grain material entering the screening box 1 from the feed hopper 2 falls vertically, and under the action of the blower 5, the grain material undergoes a projectile motion inside the screening box 1.

[0025] This grain vibrating screening conveyor also includes a feeding conveyor 3 and a discharging conveyor 4. The feeding conveyor 3 is used to transport the grain raw materials into the feeding hopper 2, and the discharging conveyor 4 is used to transport the large grain particles, medium grain particles, small grain particles, and miscellaneous materials screened by the vibrating screening component 8 out of the bottom of the screening box 1. It should be noted that both the feeding conveyor 3 and the discharging conveyor 4 include a conveyor frame, a conveyor belt, and a transmission mechanism, etc., which are existing technologies and will not be described in detail here.

[0026] The vibrating screening assembly 8 includes a fixed shaft 801 located below the inner wall of the screening box 1. A sleeve 802 is rotatably connected to the fixed shaft 801. A screening plate 803 is provided on the side wall of the sleeve 802, and several screening holes 808 are formed on the screening plate 803. Ring blocks 805 are fixedly connected to both ends of the sleeve 802 via torsion springs 804. The ring blocks 805 are controllably rotatably connected to the inner wall of the screening box 1. It should be noted that the ring blocks 805 are rotatably embedded in the inner wall of the screening box 1. This arrangement reduces the distance between the sides of the screening plate 803 and the inner wall of the screening box 1, thereby reducing the probability of large grain particles entering the screening zone for medium grain particles, medium grain particles entering the screening zone for small grain particles, and small grain particles entering the impurity zone, thus improving the screening quality of this grain vibrating screening conveyor.

[0027] It should be further explained that the diameter of the screen holes 808 on several vibrating screening components 8 decreases in the direction away from the blower 5. The vibrating screening components 8 are located between two adjacent discharge ports 102. Since the grain raw material contains large grain particles, medium grain particles, small grain particles, impurities, and flocculent dust with decreasing mass, when the grain raw material undergoes projectile motion in the screening box 1, the greater the mass, the greater the inertia, and the smaller the distance it is blown off course by the wind in the horizontal direction. Therefore, when the grain raw material falls into the inner bottom surface of the screening box 1, looking along the wind direction of the blower 5, the closer to the blower 5, the larger the mass of the grain raw material.

[0028] Reference Figure 4 As shown, the vibrating screening component 8 divides the interior of the screening box 1 into several screening zones, including a large particle screening zone, a medium particle screening zone, a small particle screening zone, and a miscellaneous material screening zone. When the grain raw material falls into each of these screening zones, it will be discharged from the screening box 1 through the corresponding discharge port 102 under the action of gravity. It should be noted that in actual operation, the grain raw material can be further subdivided, and more vibrating screening components 8 and a corresponding number of discharge ports 102 can be set accordingly.

[0029] Reference Figure 1-8 As shown, since the ring block 805 on the vibrating screening assembly 8 is controllably rotatably connected to the inner wall of the screening box 1, the ring block 805, torsion spring 804, and screening plate 803 can be controllably rotated. This allows the tilt angle of the screening plate 803 to be adjusted and controlled. When the grain raw material changes or the user's screening needs change, the screening area controlled by the screening plate 803 can be adjusted. (Refer to...) Figure 4 and Figure 5 As shown, if the screening plate 803 rotates counterclockwise, the screening area corresponding to the right side of the screening plate 803 will expand, thereby adjusting the quality range of the grain raw materials represented by the screening area, greatly improving the flexibility of use, and can quickly meet the screening and conveying needs of different grain raw materials, while also meeting the screening needs of different users that change due to production needs.

[0030] Reference Figure 1-8As shown, through the arrangement and cooperation of the ring block 805, torsion spring 804, and screening plate 803, the diameter of the screen holes 808 on the screening plate 803 decreases along the direction away from the blower 5, allowing smaller grain particles mixed in with larger grain particles to enter their respective screening zones through the screen holes 808, greatly improving the screening quality. Due to the impact of the grain material with the screening plate 803 and the rebound effect of the torsion spring 804, and because the mass of the grain material continuously impacting the screening plate 803 is not the same due to the uneven distribution of large and small grain particles in the grain material, the screening plate 803 will generate irregular small vibrations, thereby spreading the grain material falling on the screening plate 803, completing the shaking and leveling of the grain material, which helps the smaller grain particles to quickly fall from the screen holes 808 to their respective screening zones, further improving the screening quality.

[0031] It should be noted that the diameter of the sieve holes 808 on the sieve plate 803 is the minimum diameter defined by the sieve section on its right side. When the tilt angle of the sieve plate 803 changes due to changes in the user's sieve requirements, the corresponding sieve plate 803 needs to be replaced. The sieve plate 803 is detachably and fixedly connected to the sleeve 802, specifically by screws. The top surface of the sieve box 1 is removable. Therefore, when replacing the sieve plate 803, it is only necessary to open the top surface of the sieve box 1, remove the original sieve plate 803, and install the new sieve plate 803.

[0032] Reference Figure 1-8 As shown, in an optional embodiment: the vibrating screening assembly 8 further includes an arc-shaped slot 809 opened on the outer wall of the screening box 1, and a telescopic rod 806 is fixedly connected to the side wall of the ring block 805 facing the arc-shaped slot 809. An L-shaped locking rod 807 is fixedly connected to the outer end of the telescopic rod 806. A plurality of locking slots 810 are opened in a circular path on the outer wall of the screening box 1 at the arc-shaped slot 809. The L-shaped locking rod 807 extends into the locking slot 810 after being compressed by the telescopic rod 806 to restrict the rotation of the ring block 805. It should be noted that when adjusting the tilt angle of the screening plate 803, the user only needs to pull the L-shaped locking rod 807 outward to disengage it from the original locking slot 810, and then rotate the telescopic rod 806 along the arc-shaped groove 809 to make the ring block 805 start to rotate, thereby completing the adjustment of the tilt angle of the screening plate 803. Then, compress the telescopic rod 806 inward to make the L-shaped locking rod 807 enter the new locking slot 810, thereby completing the restriction of the rotation of the ring block 805. The structure is simple, efficient, and easy for users to operate.

[0033] Reference Figure 1-8As shown, in an optional embodiment: a dust removal component 7 is provided above the left side wall of the screening box 1. The dust removal component 7 includes an air outlet 701 opened above the left side wall of the screening box 1. A transition box 702 is provided at the outer end of the air outlet 701 on the left side wall of the screening box 1. The left side wall and the right side wall of the transition box 702 are connected. A plurality of water leakage holes 704 are opened on the top surface of the transition box 702. A water storage tank 703 is provided on the top surface of the transition box 702. The top surface and the bottom surface of the water storage tank 703 are connected. It should be noted that, because the grain raw materials contain very small flocculent dust, it enters the transition box 702 from the air outlet 701 in an almost horizontal state under the blowing of the blower 5. At this time, water is supplied to the water storage tank 703 through the water pipe, and the water will drip from the drain hole 704 into the transition box 702. At this time, the air blown by the blower 5 will disperse the trickle-like water droplets into smaller water droplets. The smaller water droplets will combine with the flocculent dust in the transition box 702, increasing their weight and accelerating their fall, thus avoiding the disorderly drifting of the flocculent dust and achieving the dust reduction effect. This further improves the working environment of this grain vibrating screening conveyor, which has a sophisticated and efficient structure.

[0034] Reference Figure 1-8 As shown, in an optional embodiment, the dust removal assembly 7 further includes a mesh bag 706 disposed at the left end of the transition box 702 for collecting flocculent dust. It should be noted that the mesh bag 706 enables rapid collection of flocculent dust, further cleaning the working environment of the grain vibrating screening conveyor.

[0035] Reference Figure 1-8 As shown, in an optional embodiment: an annular groove 705 is provided at the left end of the transition box 702, and the net bag 706 is clamped in the annular groove 705 by a rubber sleeve 707. It should be noted that the annular groove 705 and the rubber sleeve 707 make the disassembly and installation of the net bag 706 easier, making it convenient for users to replace the net bag 706. The structure is simple and efficient.

[0036] Reference Figure 1-8 As shown, in an optional embodiment: an air inlet 501 is provided above the right side wall of the screening box 1. The blower 5 is fixedly connected to the upper right side wall of the screening box 1 via a triangular bracket 502. The blower 5 blows air horizontally into the screening box 1 through the air inlet 501. It should be noted that the air inlet 501 is located at the air outlet of the blower 5. The triangular bracket 502 utilizes triangular stability to improve the installation stability of the blower 5, further improving the operational stability of this grain vibrating screening conveyor.

[0037] Reference Figure 1-8As shown, in an optional embodiment, a discharge pipe 6 is provided on the bottom surface of the screening box 1 at the outer end of the discharge port 102, with the top and bottom surfaces of the discharge pipe 6 being continuous. It should be noted that the discharge pipe 6 ensures that the grain falling from the discharge port 102 is guided and falls more stably onto the discharge conveying device 4, preventing it from scattering due to grain splashing.

[0038] Reference Figure 1-8 As shown, in an optional embodiment: a feed inlet 103 is provided on the right side of the top surface of the screening box 1, and the feed hopper 2 is located at the outer end of the feed inlet 103. It should be noted that the feed inlet 103 is located directly below the feed hopper 2.

[0039] Reference Figure 1-8 As shown, in one optional embodiment, the water storage tank 703 is convex in shape. It should be noted that by setting the water storage tank 703 to a convex shape, water entering the water storage tank 703 through the water pipe is less likely to splash out, thereby maintaining a clean working environment.

[0040] Reference Figure 1-8 As shown, in an optional embodiment, the fixed shaft 801, sleeve 802, and ring block 805 are coaxially arranged. It should be noted that this arrangement makes the transmission structure of controlling the sleeve 802 via the ring block 805 simpler and more stable, facilitating the production, assembly, and manufacturing of this grain vibrating screening conveyor.

[0041] The working principle of this grain vibrating screening and conveying machine will now be explained through its working process: After the grain vibrating screening conveyor is started, the grain raw material is first conveyed into the feed hopper 2 by the feeding conveyor 3. At the same time as the grain raw material falls vertically from the feed hopper 2 into the screening box 1, the blower 5 blows horizontal air into the screening box 1 from the right side. Under the combined action of gravity and horizontal air force, the grain raw material undergoes a projectile motion inside the screening box 1.

[0042] Because different components of grain raw materials have different particle masses, the mass of large grain particles, medium grain particles, small grain particles, miscellaneous materials, and flocculent dust decreases in that order. The greater the mass, the greater the inertia, and the shorter the distance the grain particles are blown off course by the wind in the horizontal direction. Therefore, during the horizontal drop process, along the wind direction, the closer to the blower 5, the greater the mass of the falling grain raw material particles.

[0043] Multiple vibrating screening components 8 are arranged along the long side inside the screening box 1, with the diameter of the screen holes 808 decreasing as they move away from the blower 5. These vibrating screening components 8 divide the interior of the screening box 1 into multiple screening zones, including a large particle screening zone, a medium particle screening zone, a small particle screening zone, and a miscellaneous material zone. The grain material falling horizontally is placed into the corresponding screening zone according to its particle size. Smaller particles mixed with larger particles will pass through the screen holes 808 and fall into their respective screening zones when they impact the screening plate 803 of their corresponding screening zone, thus achieving fine separation. Simultaneously, the falling grain material continuously impacts the screening plate 803. Combined with the rebound effect of the torsion spring 804 and the varying impact mass due to uneven grain distribution, the screening plate 803 generates irregular small vibrations. This vibration flattens the grain material falling onto the screening plate 803, helping smaller grain particles to quickly fall from the screen holes 808 into their respective areas, further improving the screening quality. Finally, the grain raw materials in each screening zone are discharged from the corresponding discharge port 102 under the action of gravity, and are transported away by the discharge conveying device 4 respectively.

[0044] When the screening area needs to be adjusted, the tilt angle of the screening plate 803 can be adjusted by the ring block 805, the telescopic rod 806, and the L-shaped clamping rod 807. In addition, the flocculent dust blown by the blower 5 will be discharged from the dust collection component 7 on the left side, and after combining with the water droplets dripping from the water leakage hole 704 in the transition box 702, it will settle or be collected by the net bag 706, thus achieving dust removal.

[0045] This invention utilizes multiple vibrating screening components 8 arranged along the long side of the screening box 1, combined with horizontal airflow from a blower 5. By leveraging the principle that particles of different masses have different impact points under the influence of wind, it achieves one-time grading and screening of large, medium, and small particles, as well as impurities. Simultaneously, the decreasing diameter of the screen holes 808 on the screening plate 803 along the wind direction, along with the irregular vibrations generated by the impact of grains and the rebound of the torsion spring 804, allows smaller grain particles to quickly fall from the screen holes 808 into their respective screening zones, effectively preventing the mixing of grains of different sizes and greatly improving screening quality and efficiency.

[0046] The vibrating screening assembly 8 of this invention allows for adjustable and controllable tilt angle of the screening plate 803 through the controllable rotation of the ring block 805, torsion spring 804, and screening plate 803. When the grain raw material changes or the user's screening needs change, the angle of the screening plate 803 can be easily adjusted to change the range of each screening area, thereby flexibly responding to the screening needs of different grain raw materials and significantly improving operational flexibility. Combined with the arc-shaped groove 809, telescopic rod 806, and L-shaped locking rod 807, the user can quickly complete angle adjustment and locking, making operation simple and efficient.

[0047] This invention features a dust removal component 7 installed above the left side wall of the screening box 1. Through the cooperation of the transition box 702, water storage tank 703, and drainage hole 704, the air blown by the blower 5 disperses the trickling water droplets into smaller particles. These particles combine with the flocculent dust, increasing their weight and accelerating their fall, effectively preventing the flocculent dust from drifting aimlessly and achieving a good dust reduction effect. Furthermore, the net bag 706 allows for rapid collection of flocculent dust, further cleaning the working environment. The structure is ingenious and practical.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A grain vibrating screening and conveying machine, characterized in that: The screen includes a screening box (1), a bottom support frame (101) is provided at the bottom of the screening box (1), a blower (5) is provided above the right side wall of the screening box (1), a feed hopper (2) is provided on the right side of the top surface of the screening box (1), a number of vibrating screening components (8) are arranged inside the screening box (1), and a number of discharge ports (102) are arranged on the bottom surface of the screening box (1). It also includes a feeding conveyor (3) and a discharging conveyor (4). The feeding conveyor (3) is used to convey grain raw materials into the feeding hopper (2), and the discharging conveyor (4) is used to convey the large grain particles, medium grain particles, small grain particles and miscellaneous materials screened by the vibrating screening component (8) out of the bottom of the screening box (1). The vibrating screening assembly (8) includes a fixed shaft (801) located below the inner side wall of the screening box (1). The fixed shaft (801) is rotatably connected to a sleeve (802). A screening plate (803) is provided on the side wall of the sleeve (802). The screening plate (803) includes a plurality of screen holes (808). Both ends of the sleeve (802) are fixedly connected to ring blocks (805) by torsion springs (804). The ring blocks (805) are controllably rotatably connected to the inner side wall of the screening box (1). The diameter of the screen holes (808) on several vibrating screening components (8) decreases in the direction away from the blower (5); The vibrating screening component (8) is located between two adjacent discharge ports (102).

2. The grain vibrating screening and conveying machine according to claim 1, characterized in that: The vibrating screening assembly (8) also includes an arc-shaped slot (809) on the outer wall of the screening box (1). The side wall of the ring block (805) facing the arc-shaped slot (809) is fixedly connected to a telescopic rod (806). The outer end of the telescopic rod (806) is fixedly connected to an L-shaped locking rod (807). The outer wall of the screening box (1) is provided with several locking slots (810) in a circular path at the arc-shaped slot (809). The L-shaped locking rod (807) is compressed by the telescopic rod (806) and then extends into the locking slot (810) to restrict the rotation of the ring block (805).

3. The grain vibrating screening and conveying machine according to claim 1, characterized in that: A dust removal component (7) is provided above the left side wall of the screening box (1). The dust removal component (7) includes an air outlet (701) opened above the left side wall of the screening box (1). A transition box (702) is provided at the outer end of the air outlet (701) on the left side wall of the screening box (1). The left side wall and the right side wall of the transition box (702) are connected. Several water leakage holes (704) are opened on the top surface of the transition box (702). A water storage tank (703) is provided on the top surface of the transition box (702). The top surface and the bottom surface of the water storage tank (703) are connected.

4. A grain vibrating screening conveyor according to claim 3, characterized in that: The dust removal assembly (7) also includes a net bag (706) located at the left end of the transition box (702) for collecting flocculent dust.

5. A grain vibrating screening conveyor according to claim 4, characterized in that: The left end of the transition box (702) is provided with an annular groove (705), and the net bag (706) is clamped in the annular groove (705) by a rubber sleeve (707).

6. A grain vibrating screening conveyor according to claim 1, characterized in that: An air inlet (501) is provided on the upper right side wall of the screening box (1). The blower (5) is fixedly connected to the upper right side wall of the screening box (1) through a triangular bracket (502). The blower (5) blows air horizontally into the screening box (1) through the air inlet (501).

7. A grain vibrating screening conveyor according to claim 1, characterized in that: The bottom surface of the screening box (1) is provided with a discharge pipe (6) at the outer end of the discharge port (102), and the top and bottom surfaces of the discharge pipe (6) are connected.

8. A grain vibrating screening conveyor according to claim 1, characterized in that: The screening box (1) has a feed inlet (103) on the right side of its top surface, and the feed hopper (2) is located at the outer end of the feed inlet (103).

9. A grain vibrating screening conveyor according to claim 5, characterized in that: The water storage tank (703) is convex in shape.

10. A grain vibrating screening conveyor according to claim 1, characterized in that: The fixed shaft (801), sleeve (802) and ring block (805) are coaxially arranged.

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