Wheat seed screening device

Abstract

This application discloses a wheat seed screening device, belonging to the field of screening devices, used for screening. It includes a screening cylinder with a water outlet and stirring blades. An outer cylinder is coaxially arranged above the screening cylinder, and an inner cone is coaxially arranged inside the outer cylinder. The inner cone and the outer cylinder are connected by several connecting ribs. The bottom of the inner cone extends beyond the bottom of the outer cylinder and is integrally formed with an outer edge plate. A gap is left between the outer edge plate and the bottom surface of the inner cone for wheat discharge. The stirring blades are located on a main shaft and distributed around the main shaft. The main shaft passes upward through the inner cone and is connected to a drive motor assembly. The drive motor assembly is located on a lifting platform, which is connected to a lifting cylinder. This application can achieve the screening of wheat seeds in water, and utilizes the flow of water to discharge diseased wheat seeds and impurities whose weight is less than the buoyancy of the water, making it suitable for the preliminary screening of small batches of wheat seeds.

Description

Technical Field

[0001] This application belongs to the field of screening devices, and more specifically, relates to a wheat seed screening device. Background Technology

[0002] Selecting suitable wheat seeds based on different planting environments can improve planting results and yield to a certain extent. Therefore, in the process of selecting wheat seeds, it is necessary to screen for plump, uniform-sized grains free from pests and diseases. After screening, the wheat seeds should be treated with pesticides to improve the survival rate.

[0003] To screen wheat seeds that are plump and uniform in size, Chinese patent publication CN118179924A discloses the following technical solution: A screening structure is included, comprising a screening chamber, an inlet at the top of the screening chamber, a diversion structure connected to the inside of the inlet, a screen cylinder inside the screening chamber, screen slits with gradually increasing spacing on the screen cylinder, a spiral plate fixed inside the screen cylinder, a pressure plate attached to the screen cylinder at the top of the screen cylinder, and a guide plate inclined below the screen cylinder. An outlet separated by a partition is located on one side of the guide plate. The diversion structure evenly and orderly feeds wheat into the screen cylinder. The screen cylinder has screen slits with increasing spacing and a spiral groove inside, allowing the wheat to move from one end to the other. During this movement, wheat grains of different plumpness gradually fall, achieving initial screening. After secondary screening by the guide plate, the wheat enters the outlet. The wheat is evenly and orderly distributed within the screening chamber, resulting in high screening efficiency and preventing screen clogging.

[0004] However, the applicant believes that during the screening of wheat seeds, it is necessary to remove seeds containing pests and diseases, as well as impurities, otherwise it may affect the structure of the subsequent sieves and screens. Therefore, the applicant is exploring the use of buoyancy in water to perform preliminary buoyancy screening of wheat seeds containing pests, diseases, and impurities, in order to reduce the impact on the subsequent sieves and other structures after drying. Summary of the Invention

[0005] The purpose of this application is to provide a wheat seed screening device that can screen wheat seeds in water and use the flow of water to discharge diseased wheat seeds and impurities whose own weight is less than the buoyancy of the water, which is suitable for the preliminary screening of small batches of wheat seeds.

[0006] To achieve the above objectives, this application employs the following technical solution:

[0007] The wheat seed screening device described in this application includes a screening cylinder with an opening at the top and a water outlet on one side wall. A stirring blade is disposed inside the screening cylinder. An outer cylinder is coaxially disposed above the screening cylinder. An inner cone is coaxially disposed inside the outer cylinder. The inner cone and the outer cylinder are connected by several connecting ribs. The bottom of the inner cone extends beyond the bottom of the outer cylinder and is integrally provided with an outer edge plate. A gap is left between the outer edge plate and the bottom surface of the inner cone for wheat discharge. The stirring blade is located on a main shaft and distributed around the main shaft. The main shaft passes upward through the inner cone and is connected to a drive motor assembly. The drive motor assembly is located on a lifting platform, and the lifting platform is connected to a lifting cylinder.

[0008] As one of the preferred technical solutions of this application, the lifting cylinder is connected to the top beam, and the two ends of the top beam are provided with side beams for connection, and the side beams are fixedly connected to the screening cylinder.

[0009] As one of the preferred technical solutions of this application, the side beam is provided with a side guide hole in the length direction, and the two ends of the lifting plate are provided with guide shafts, and the lifting plate slides along the side guide hole through the guide shafts.

[0010] As one of the preferred technical solutions of this application, the stirring blade is inclined relative to the bottom surface of the screening cylinder, the bottom end of the stirring blade is located in the direction of travel, and the top end of the stirring blade is located behind the bottom end; the stirring blade is provided with a plurality of stirring rods between the outer edge of the outer edge plate and the inner wall of the screening cylinder, and the stirring rods extend in the direction of the bottom surface of the outer edge plate.

[0011] As one of the preferred technical solutions of this application, the bottom end of the screening cylinder is provided with several legs, and the bottom surface of the screening cylinder is provided with a discharge port. In the initial state, the inlet of the discharge port is blocked by a sealing plate.

[0012] As one of the preferred technical solutions of this application, the screening cylinder is provided with an air outlet plate at the bottom of the central axis. The air outlet plate is connected to the air inlet pipe. The air inlet pipe extends from the bottom of the screening cylinder and is connected to the high-pressure air circuit. The air inlet pipe is provided with a shut-off valve for shutting off the air circuit.

[0013] As one of the preferred technical solutions of this application, the screening cylinder is provided with several branch pipes on one side relative to the water outlet. The branch pipes are distributed along the central axis of the screening cylinder and are connected to the water inlet pipe. The water inlet pipe is connected to the external water supply pipeline.

[0014] As one of the preferred technical solutions of this application, the branch pipe extends into the interior of the screening cylinder and the water outlet direction of the branch pipe is set along the tangential direction of the screening cylinder.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] This application achieves the dispersion of wheat seeds through the cooperation of the outer cylinder and the inner cone, and achieves the stirring of wheat in water through the stirring blades, stirring rods and air outlet plate in the screening cylinder, thereby improving the preliminary screening of diseased seeds, morphologically damaged seeds and impurities that float to the surface due to their own weight being less than the buoyancy of the water, thus improving the efficiency and quality of the preliminary seed screening. Attached Figure Description

[0017] Figure 1 This is the three-dimensional representation of the present application. Figure 1 .

[0018] Figure 2 This is the three-dimensional representation of the present application. Figure 2 .

[0019] Figure 3 This is a top view of this application.

[0020] Figure 4 yes Figure 3 A cross-sectional view at the position and direction shown in AA.

[0021] In the diagram: 1. Top beam; 2. Side beam; 3. Side guide hole; 4. Lifting cylinder; 5. Guide shaft; 6. Lifting carrier plate; 7. Drive motor assembly; 8. Connecting rib; 9. Inner cone; 10. Outer cylinder; 11. Outer edge plate; 12. Screening cylinder; 13. Water outlet; 14. Agitator blade; 15. Agitator rod; 16. Air outlet plate; 17. Support leg; 18. Air inlet pipe; 19. Material outlet; 20. Water inlet pipe; 21. Branch pipe; 22. Sealing plate; 23. Main shaft. Detailed Implementation

[0022] The technical solutions described in this application will be further described below with reference to the accompanying drawings and embodiments.

[0023] Example 1

[0024] See Figures 1 to 4A wheat seed screening device includes a screening cylinder 12 with a circular cylindrical structure. The top of the screening cylinder 12 is open and the bottom is sealed. A support leg 17 is provided at the bottom of the screening cylinder 12 to ensure its horizontal orientation. A water outlet 13 is provided at the top edge of the screening cylinder 12, and there is a height difference between the inlet of the water outlet 13 and the bottom surface of the screening cylinder 12 to accommodate water. Several branch pipes 21 are provided on the side wall of the screening cylinder 12 opposite to the water outlet 13. The outlets of the branch pipes 21 are located inside the screening cylinder 12, and the water outlet direction of the branch pipes 21 is tangential to the screening cylinder 12. The branch pipes 21 and the outer surface of the screening cylinder 12... The inlet pipe 20 is connected to an external water supply pipeline. The screening cylinder 12 has stirring blades 14 inside, distributed around the main shaft 23 and fixedly connected to it. An outer cylinder 10 is located at the top opening of the screening cylinder 12. The outer cylinder 10 is a circular cylinder with openings at both the top and bottom. An inner cone 9 is coaxially arranged inside the outer cylinder 10, with its bottom end extending beyond the bottom end of the outer cylinder 10 and integrally formed with an outer edge plate 11. The outer edge of the outer edge plate 11 extends beyond the outer edge of the outer cylinder 10, leaving sufficient distance between the top surface of the outer edge plate 11 and the bottom surface of the outer cylinder 10 for wheat discharge. The inner cone 9 is circumferentially connected to the inner wall of the outer cylinder 10 via connecting ribs 8. The main shaft 23 extends upward and is fixedly connected to the inner cone 9. The top end of the main shaft 23 is connected to the drive motor assembly 7 via a coupling. The drive motor assembly 7 is located on the lifting platform 6, and the lifting platform 6 is connected to the lifting cylinder 4.

[0025] In the technical solution described in this embodiment, the screening cylinder 12 is a cylindrical structure, which is used to hold the wheat seeds to be screened after being dispersed by the inner cone 9 and the inner cone 10, as well as the water used to screen the wheat seeds.

[0026] In the technical solution described in this embodiment, the outlet 13 is used to discharge the seeds of pests and diseases, impurities, etc. floating on the surface of the water in the screening cylinder 12. Therefore, there is a sufficient distance between the outlet 13 and the bottom surface of the screening cylinder 12 to accommodate the water and discharge the upper layer of water, so as to satisfy the flow of water between the screening cylinder 12 and the outlet 13.

[0027] In the technical solution described in this embodiment, the screening cylinder 12 is equipped with a stirring blade 14. Driven by the main shaft 23, the stirring blade 14 agitates the wheat seeds inside the screening cylinder 12, causing impurities and diseased seeds to float to the surface. The stirring blade 14 is located near the bottom of the screening cylinder 12, and its purpose is solely to achieve slow agitation of the wheat seeds.

[0028] In the technical solution described in this embodiment, a coaxial outer cylinder 10 and an inner cone 9 are arranged above the screening cylinder 12. Sufficient distance is left between the outer wall of the inner cone 9 and the inner wall of the outer cylinder 10 for wheat flow, and an integrally formed outer edge plate 11 extending outward from the outer cylinder 10 is provided on the bottom surface of the inner cone 9. Wheat seeds are distributed in the screening cylinder 12 by the dispersing action of the outer cylinder 10, the inner cone 9, and the outer edge plate 11.

[0029] In the technical solution described in this embodiment, at least three connecting ribs 8 are provided between the outer cylinder 10 and the inner cone 9. The connecting ribs 8 can separate the fed wheat to assist in the dispersion of the outer cylinder 10, the inner cone 9, and the outer edge plate 11.

[0030] In the technical solution described in this embodiment, the drive motor assembly 7 includes a drive motor and a reduction mechanism. The drive motor provides power input to the reduction mechanism, which is a gear reducer. The reduction mechanism has an output shaft, and the output shaft is connected to a main shaft 23 via a coupling.

[0031] In the technical solution described in this embodiment, the drive motor assembly 7 is located on the lifting carrier plate 6. The lifting carrier plate 6 can move relative to the screening cylinder 12 under the action of the extension end of the lifting cylinder 4, thereby causing the structures including the stirring blade 14 and other structures located inside the screening cylinder 12 to be moved out of the screening cylinder 12.

[0032] Example 2

[0033] See Figures 1 to 4 A wheat seed screening device is disclosed, wherein the stirring blade 14 is inclined relative to the bottom surface of the screening cylinder 12, the front of the stirring blade 14 is the bottom end of the stirring blade 14, and the top end of the stirring blade 14 is located behind the bottom end. Several stirring rods 15 are provided on the stirring blade 14 between the outer edge of the outer edge plate 11 and the inner wall of the screening cylinder 12, and the stirring rods 15 extend towards the bottom surface of the outer edge plate 11. The direction of movement of the stirring blade 14 is the same as the water outlet direction of the branch pipe 21. A discharge port 19 is provided on the bottom surface of the screening cylinder 12, and a sealing plate 22 is initially provided at the inlet position of the discharge port 19. An air outlet plate 16 is provided at the central axis position of the bottom surface of the screening cylinder 12, and several through holes are provided on the circumferential sidewall of the air outlet plate 16. An air inlet pipe 18 is provided at the bottom end of the air outlet plate 16, extending from the bottom end of the screening cylinder 12 and communicating with a high-pressure air circuit. The side beam 2 is provided with a side guide hole 3 in the length direction, the lifting plate 6 is provided with guide shafts 5 at both ends that slide along the side guide hole 3, the bottom end of the lifting cylinder 4 is fixed to the top beam 1, the top beam 1 is fixedly connected to the side beam 2, and the bottom end of the side beam 2 is fixedly connected to the screening cylinder 12.

[0034] The structure and connection method of the remaining parts are the same as those described in the foregoing embodiments.

[0035] In the technical solution described in this embodiment, the stirring blade 14 is inclined relative to the screening cylinder 12 to better agitate the wheat that has settled at the bottom of the screening cylinder 12. Since the stirring blade 14 is located at the bottom of the screening cylinder 12 and moves relatively slowly, it has little impact on the flow of water at the top layer. Therefore, the stirring direction of the stirring blade 14 can be the same as the flow direction of the water supplied by the branch pipe 21.

[0036] In the technical solution described in this embodiment, in order to agitate the wheat falling into the screening cylinder 12, a plurality of stirring rods 15 can be provided. The stirring rods 15 can assist in dispersing and agitating the wheat seeds falling from the outer edge plate 11 into the screening cylinder 12.

[0037] In the technical solution described in this embodiment, the air inlet pipe 18 realizes the distribution of airflow in the water body through the air outlet plate 16, and the air pressure of the external high pressure pipeline should be sufficient to allow the gas discharged from the air outlet plate 16 to disturb the wheat seeds in the screening cylinder 12.

[0038] In the technical solution described in this embodiment, the air outlet plate 16 is a closed cylindrical body with several through holes distributed on its circumferential sidewalls. These through holes allow gas to be discharged into the water. A shut-off valve is provided on the air inlet pipe 18 to control the flow of gas.

[0039] Finally, although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A wheat seed screening device comprising a screening cylinder (12) having an open top end, a water outlet (13) provided in a side wall of the screening cylinder (12), characterised in that, The screening cylinder (12) is provided with stirring blades (14) inside. The screening cylinder (12) is coaxially provided with an outer cylinder (10) above it. The outer cylinder (10) is coaxially provided with an inner cone (9) inside it. The inner cone (9) and the outer cylinder (10) are connected by several connecting ribs (8). The bottom of the inner cone (9) extends out of the bottom of the outer cylinder (10) and is integrally provided with an outer edge plate (11). A gap is left between the outer edge plate (11) and the bottom surface of the inner cone (9) for wheat discharge. The stirring blades (14) are located on the main shaft (23) and distributed around the main shaft (23). The main shaft (23) passes through the inner cone (9) upward and is connected to the drive motor assembly (7). The drive motor assembly (7) is located on the lifting plate (6). The lifting plate (6) is connected to the lifting cylinder (4).

2. The wheat seed screening device of claim 1, wherein, The lifting cylinder (4) is connected to the top beam (1), and the two ends of the top beam (1) are connected by side beams (2), which are fixedly connected to the screening cylinder (12).

3. The wheat seed screening device of claim 2, wherein, The side beam (2) is provided with a side guide hole (3) in the length direction, and the lifting plate (6) is provided with guide shafts (5) at both ends. The lifting plate (6) slides along the side guide hole (3) through the guide shafts (5).

4. The wheat seed screening device according to any one of claims 1 to 3, characterized in that, The stirring blade (14) is inclined relative to the bottom surface of the screening cylinder (12), with the bottom end of the stirring blade (14) located in the direction of travel and the top end of the stirring blade (14) located behind the bottom end; the stirring blade (14) has several stirring rods (15) between the outer edge of the outer edge plate (11) and the inner wall of the screening cylinder (12), and the stirring rods (15) extend in the direction of the bottom surface of the outer edge plate (11).

5. The wheat seed screening device according to claim 4, characterized in that, The bottom end of the screening cylinder (12) is provided with several legs (17), and the bottom surface of the screening cylinder (12) is provided with a discharge port (19). In the initial state, the inlet of the discharge port (19) is blocked by a sealing plate (22).

6. The wheat seed screening device according to claim 1, characterized in that, The screening cylinder (12) has an air outlet plate (16) at the bottom of the central axis. The air outlet plate (16) is connected to the air inlet pipe (18). The air inlet pipe (18) extends from the bottom of the screening cylinder (12) and is connected to the high-pressure air circuit. The air inlet pipe (18) is equipped with a shut-off valve for shutting off the air circuit.

7. The wheat seed screening device of claim 1, wherein, The screening cylinder (12) has several branch pipes (21) on one side relative to the outlet (13). The branch pipes (21) are distributed along the central axis of the screening cylinder (12). The branch pipes (21) are connected to the inlet pipe (20), and the inlet pipe (20) is connected to the external water supply pipeline.

8. The wheat seed screening device of claim 7, wherein, The branch pipe (21) extends into the interior of the screening cylinder (12) and the water outlet direction of the branch pipe (21) is set along the tangential direction of the screening cylinder (12).

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