Agricultural production screening device

Abstract

The utility model relates to the technical field of agricultural seed processing, and discloses an agricultural production screening device which comprises a screening barrel, two screening mechanisms arranged up and down are installed in the screening barrel, each screening mechanism comprises two supporting frames installed on the inner wall of the screening barrel, a screen is movably installed between the two supporting frames, and the screen is arranged on the screening barrel. The screen meshes are obliquely arranged, the two screen meshes are arranged in parallel, and the pore diameters of the two screen meshes are different; through the design that the two screening mechanisms are installed in the screening barrel, secondary screening of seeds is achieved, the seeds with qualified sizes are classified, later use is facilitated, unqualified seeds are independently screened out, qualified seeds left on a screen are directly discharged through a discharging channel in the screening process, the seeds are prevented from being accumulated on the screen, and the screening efficiency is improved. The seed screening device has the advantages that the seed screening continuity is better, and the seed screening efficiency is further improved.

Description

Technical Field

[0001] This utility model relates to the field of agricultural seed processing technology, specifically to an agricultural production screening device. Background Technology

[0002] Seed screening is a crucial step in agricultural production. Screening removes impurities, diseased, insect-infested, and shriveled seeds, retaining only plump, vigorous seeds. This not only improves germination and seedling emergence rates but also reduces pest and disease occurrence, thereby increasing crop yield and quality.

[0003] A search revealed that patent application number CN201920963181.6 discloses an agricultural production screening device, including an annular support plate. A groove is provided on the inner side of the annular support plate, and a vertically movable vibrating plate is installed inside the groove. A vibration mechanism for vibrating the vibrating plate is installed inside the groove. A screen is installed inside the vibrating plate, and a baffle is fixedly connected to the upper end of the vibrating plate. A turning mechanism for turning the material is installed inside the baffle, and a feeding plate is fixedly connected to the inner side of the annular support plate. This utility model has a reasonable structural design. The vibration mechanism generates vibration, which enables the screen to screen the material, and the turning mechanism turns the material, thus achieving thorough screening and improving the screening effect.

[0004] The seed screening device based on agricultural planting described above has a simple structure with only one screen and performs a single screening of the material. The screening effect is poor, as only small particles can pass through the screen, while medium and large particles will accumulate on the screen until the screening is completed. This screening method is prone to screen blockage, and the long-term accumulation of medium / large particles affects the screening efficiency of small particles. Therefore, we need to propose an agricultural production screening device. Utility Model Content

[0005] The purpose of this invention is to provide an agricultural production screening device. By installing two screening mechanisms inside the screening cylinder, secondary screening of seeds is achieved, classifying seeds that meet the size requirements for later use, while unqualified seeds are also screened out separately. During the screening process, qualified seeds remaining on the screen are directly discharged through the discharge channel, avoiding seed accumulation on the screen and preventing screen blockage, which would affect subsequent screening processes. Furthermore, this device provides better continuity in seed screening, thereby improving the efficiency of seed screening and solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an agricultural production screening device, including a screening cylinder, inside which are installed two screening mechanisms arranged vertically. Each screening mechanism includes two support frames installed on the inner wall of the screening cylinder, and a screen is movably installed between the two support frames. The screen is inclined and the two screens are arranged in parallel, with different apertures.

[0007] The screen cylinder is also equipped with a partition between two screens. The front end of the screen cylinder has two discharge ports near one end of the screen. The front end of the screen cylinder is also equipped with two discharge channels located below the discharge ports.

[0008] Preferably, the screening mechanism further includes a cover fixed to the side of the screening cylinder, a motor is installed inside the cover, and an abutment block is connected to the output shaft of the motor. The abutment block is elliptical in shape.

[0009] Preferably, the support frame has a second through hole, and a connecting rod is slidably installed inside the second through hole, with one end of the connecting rod aligned with the abutment block.

[0010] Preferably, a spring is connected between the inner wall of the support frame and the side of the screen, a limiting groove is provided at the lower end of the side of the screen, and a limiting block is connected to the other end of the connecting rod, the limiting block being inserted into the limiting groove.

[0011] Preferably, the support frame has a groove, and a connecting block is slidably installed inside the groove, with the bottom of the screen connected to the connecting block.

[0012] Preferably, the top of the screening cylinder is provided with a feed inlet, the inside of which is equipped with a feed hopper, and the top of the screening cylinder is also equipped with a cleaning mechanism for removing stones and dust from the seeds.

[0013] Preferably, a first through hole is provided at the lower end of one side of the screening cylinder, and a defective product collection box for holding small seeds is inserted into the first through hole.

[0014] Preferably, the front end of the screening cylinder is connected to a hanging frame located below the discharge port, one end of the feeding channel is connected to a fixing plate, the fixing plate has a through groove, the top of the through groove is connected to a hanging plate, and the hanging plate is hung on the hanging frame.

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

[0016] This invention achieves secondary screening of seeds by installing two screening mechanisms inside the screening cylinder. Seeds that meet the size requirements are classified for convenient later use, while unqualified seeds are also screened out separately. During the screening process, qualified seeds that remain on the screen are directly discharged through the discharge channel, avoiding seed accumulation on the screen and clogging that would affect subsequent screening processes. Furthermore, this device provides better continuity in seed screening, thereby improving the efficiency of seed screening. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the screen cylinder structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the screening cylinder of this utility model;

[0020] Figure 4 This is a schematic diagram of the material screening mechanism of this utility model;

[0021] Figure 5 This is a schematic diagram of the material feeding channel of this utility model.

[0022] In the diagram: 1. Screening cylinder; 11. Feed inlet; 12. First through hole; 2. Feed hopper; 3. Impurity removal mechanism; 4. Screening mechanism; 41. Cover; 42. Motor; 43. Contact block; 44. Connecting rod; 45. Support frame; 46. Second through hole; 47. Groove; 48. Spring; 49. Screen; 410. Limiting groove; 411. Limiting block; 412. Connecting block; 5. Defective product collection box; 6. Discharge channel; 61. Fixing plate; 62. Through groove; 63. Hanging plate; 7. Discharge port; 8. Hanging frame; 9. Partition plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5This utility model provides a technical solution: an agricultural production screening device, including a screening cylinder 1, inside which are installed two screening mechanisms 4 arranged vertically. The two screening mechanisms 4 realize two screenings of seeds. The first screening can screen out large seeds, and the second screening can screen out medium-sized seeds, while small seeds fall into the defective product collection box 5.

[0025] The screening mechanism 4 includes two support frames 45 installed on the inner wall of the screening cylinder 1. The support frames 45 are L-shaped and arranged in parallel. A screen 49 is movably installed between the two support frames 45. The screen 49 can move back and forth laterally to screen the seeds. The screen 49 is inclined to facilitate the rolling of seeds on the screen 49, allowing qualified seeds retained on the screen 49 to roll down onto the discharge channel 6 for discharge. The two screens 49 are arranged in parallel and have different apertures; specifically, the aperture of the upper screen 49 is larger than that of the lower screen 49.

[0026] The screen cylinder 1 is also equipped with a partition 9 located between two screens 49. The partition 9 is also inclined, but the inclination direction of the partition 9 is opposite to that of the screen 49. It is used to send the medium / small seeds falling from the upper screen 49 to the front end (higher position) of the lower screen 49. The front end of the screen cylinder 1 has two discharge ports 7 near one end of the screen 49 (lower position). The front end of the screen cylinder 1 is equipped with two feeding channels 6 located below the discharge ports 7. The feeding channels 6 are inclined.

[0027] The screening mechanism 4 also includes a cover 41 fixed on the side of the screening cylinder 1. A motor 42 is installed inside the cover 41. The motor 42 is a servo motor used to adjust the shaking frequency of the screen 49. An abutment block 43 is connected to the output shaft of the motor 42. The abutment block 43 is an elliptical abutment block.

[0028] The support frame 45 has a second through hole 46, and a connecting rod 44 is slidably installed inside the second through hole 46. One end of the connecting rod 44 is aligned with the abutment block 43.

[0029] During screening, the motor 42 drives the elliptical contact block 43 to rotate. The contact block 43 is always in contact with the connecting rod 44 during the rotation. Due to the elliptical shape, with the help of the spring 48, the contact block 43 pushes the connecting rod 44 to make reciprocating linear motion, which in turn drives the screen 49 to move laterally back and forth, thus achieving the screening of seeds.

[0030] A spring 48 is connected between the inner wall of the support frame 45 and the side of the screen 49. When the shaft end of the abutment block 43 abuts against the connecting rod 44 and transitions to the side of the abutment block 43 and the connecting rod 44, the screen 49 is driven to move closer to the abutment block 43 under the elastic force of the spring 48. A limiting groove 410 is opened at the lower end of the side of the screen 49. The other end of the connecting rod 44 is connected to a limiting block 411. The limiting block 411 is inserted into the limiting groove 410, realizing the connection between the connecting rod 44 and the screen 49. The screen 49 is moved through the connecting rod 44, and the detachable connection between the connecting rod 44 and the screen 49 is realized.

[0031] The support frame 45 has a groove 47, and a connecting block 412 is slidably installed inside the groove 47. The bottom of the screen 49 is connected to the connecting block 412.

[0032] Specifically, the upper surface of the connecting block 412 is connected to an elastic silicone rubber ball, and the bottom of the screen 49 is provided with a slot, in which the silicone rubber ball is engaged, thereby enabling the screen 49 to be detached and installed, facilitating the replacement of screens 49 with different apertures according to the screening requirements of different materials.

[0033] The top of the screening cylinder 1 is provided with a feed inlet 11, and a feed hopper 2 is installed inside the feed inlet 11. The top of the screening cylinder 1 is also provided with a cleaning mechanism 3 for removing stones and dust from the seeds. The seeds after cleaning are fed into the interior of the screening cylinder 1 through the feed hopper 2.

[0034] A first through hole 12 is provided at the lower end of one side of the screening cylinder 1, and a defective product collection box 5 for holding small seeds is inserted into the first through hole 12.

[0035] The front end of the screening cylinder 1 is connected to a hanging bracket 8 located below the discharge port 7. One end of the discharge channel 6 is connected to a fixing plate 61. A through groove 62 is provided on the fixing plate 61. A hanging plate 63 is connected to the top of the through groove 62. The hanging plate 63 is hung on the hanging bracket 8, so that the discharge channel 6 can be detached and installed.

[0036] In use, before the seeds enter the screening cylinder 1, the impurity removal mechanism 3 first removes impurities such as stones and dust mixed in with the seeds. After the seeds enter the screening cylinder 1, they are first screened through the upper large-aperture screen 49. Large seeds roll along the upper screen 49 and are discharged from the upper discharge channel 6. Medium / small seeds fall from the large mesh of the upper screen 49 and land on the lower small-aperture screen 49. Medium-sized seeds are intercepted by the small-aperture screen 49 and roll along the small-aperture screen 49 and are discharged from the lower discharge channel 6. Unqualified small seeds fall into the defective product collection box 5, thus completing the seed screening.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An agricultural production screening device, comprising a screening cylinder (1), characterized in that: The screen cylinder (1) is equipped with two screen mechanisms (4) arranged vertically. The screen mechanism (4) includes two support frames (45) installed on the inner wall of the screen cylinder (1). A screen (49) is movably installed between the two support frames (45). The screen (49) is inclined and the two screens (49) are arranged in parallel. The apertures of the two screens (49) are different. The screen cylinder (1) is also equipped with a partition (9) located between two screens (49). The front end of the screen cylinder (1) is provided with two discharge ports (7) near one end of the screen (49). The front end of the screen cylinder (1) is equipped with two discharge channels (6) located below the discharge ports (7).

2. The agricultural production screening device according to claim 1, characterized in that: The screening mechanism (4) also includes a cover (41) fixed on the side of the screening cylinder (1). A motor (42) is installed inside the cover (41). An abutment block (43) is connected to the output shaft of the motor (42). The abutment block (43) is an elliptical abutment block.

3. The agricultural production screening device according to claim 2, characterized in that: The support frame (45) has a second through hole (46), and a connecting rod (44) is slidably installed inside the second through hole (46). One end of the connecting rod (44) is aligned with the abutment block (43).

4. The agricultural production screening device according to claim 3, characterized in that: A spring (48) is connected between the inner wall of the support frame (45) and the side of the screen (49). A limiting groove (410) is opened at the lower end of the side of the screen (49). The other end of the connecting rod (44) is connected to a limiting block (411), which is inserted into the limiting groove (410).

5. An agricultural production screening device according to claim 1, characterized in that: The support frame (45) has a groove (47) and a connecting block (412) is slidably installed inside the groove (47). The bottom of the screen (49) is connected to the connecting block (412).

6. An agricultural production screening device according to claim 1, characterized in that: The top of the screening cylinder (1) is provided with a feed inlet (11), and a feed hopper (2) is installed inside the feed inlet (11). The top of the screening cylinder (1) is also provided with a cleaning mechanism (3) for removing stones and dust from the seeds.

7. An agricultural production screening device according to claim 1, characterized in that: The lower end of one side of the screening cylinder (1) is provided with a first through hole (12), and a defective product collection box (5) for holding small seeds is inserted into the first through hole (12).

8. An agricultural production screening device according to claim 1, characterized in that: The front end of the screening cylinder (1) is connected to a hanging frame (8) located below the discharge port (7). One end of the feeding channel (6) is connected to a fixing plate (61). A through groove (62) is provided on the fixing plate (61). A hanging plate (63) is connected to the top of the through groove (62). The hanging plate (63) is hung on the hanging frame (8).

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