Efficient fertilizer screening device

Abstract

The utility model provides an efficient fertilizer screening device, which relates to the technical field of fertilizer screening, and particularly comprises a screening box, two screening plates are arranged in the screening box, two vibration motors are arranged in the screening box and located on the two sides below the two screening plates, and a plurality of through holes are formed in the two screening plates. Auxiliary structures are arranged in the multiple through holes, each auxiliary structure comprises a plurality of adjusting plates, the multiple adjusting plates are slidably connected with the sieve plate and the through holes, sliding rods are fixedly installed on the two corresponding sides, away from the through holes, of the multiple adjusting plates, the multiple sliding rods are slidably connected with the sieve plate, and first threaded rods are arranged on the sides, away from the through holes, of the multiple adjusting plates. By arranging the auxiliary structure, the size of the through holes of the sieve plate can be flexibly adjusted according to actual requirements, precise screening of fertilizer particles with different particle sizes is achieved, the screening flexibility and applicability are improved, meanwhile, the vibration motor drives the sieve plate installed in the base and the U-shaped plate to vibrate, and the screening efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of fertilizer screening technology, specifically a high-efficiency fertilizer screening device. Background Technology

[0002] Fertilizer is one of the material bases of agricultural production. It mainly includes ammonium phosphate fertilizer, water-soluble fertilizer with macro-elements, fertilizer with medium-element elements, bio-fertilizer, organic fertilizer, and multi-dimensional field energy concentrated organic fertilizer. Before processing, fertilizer raw materials of different sizes need to be screened in multiple stages using a screening machine to facilitate subsequent processing and improve the quality of fertilizer products.

[0003] Chinese Patent Announcement No. CN221133068U discloses a high-efficiency vibrating screening device for fertilizer granules, relating to the field of agricultural fertilizer technology. The device includes a base plate, with a vibration motor and a drive motor installed at the bottom end of the base plate. A sorting bin is installed at the top of the base plate, and a screening bin is installed above the sorting bin. A rotating tube is fixedly connected to the inside of the screen via a rotating shaft. A stirring rod is symmetrically installed inside the rotating tube. One end of each stirring rod is fixed to a rotating column via a fixing mechanism. Connecting plates are installed at both ends of the base plate. An electric telescopic rod is fixedly connected to the top of each connecting plate. A connecting block is integrally connected to the other end of each electric telescopic rod. A first return spring is fixedly connected to one end of each connecting block, and a telescopic block is fixedly connected to the other end of the first return spring. A locking mechanism is installed inside the telescopic block. This invention, employing the above structure, improves the efficiency of fertilizer screening and reduces the screening time.

[0004] In the existing technology, the high-efficiency vibrating screening device for fertilizer granules does not have an auxiliary structure that allows for adjusting the size of the screen plate holes, making it difficult to accurately screen fertilizer granules of different sizes. This results in poor applicability when facing various fertilizer screening needs. Therefore, we have made improvements and proposed a high-efficiency fertilizer screening device. Utility Model Content

[0005] The purpose of this invention is to address the problem that it is inconvenient to adjust the size of the through holes in the screen plate during the use of a current high-efficiency vibrating screening device for fertilizer granules.

[0006] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0007] A high-efficiency fertilizer screening device can flexibly adjust the size of the through holes in the screen plate according to actual needs by setting an auxiliary structure, so as to improve the above-mentioned problems.

[0008] The application is as follows:

[0009] A high-efficiency fertilizer screening device includes a screening box. Two screen plates are installed inside the screening box. Two vibrating motors are installed inside the screening box on both sides below the two screen plates. Multiple through holes are formed on each of the screen plates. An auxiliary structure is installed inside each of the through holes. The auxiliary structure includes multiple adjusting plates, each of which is slidably connected to the screen plates and through holes. Sliding rods are fixedly installed on the opposite sides of each adjusting plate away from the through holes. The sliding rods are slidably connected to the screen plates. A first threaded rod is provided on the side of each adjusting plate away from the through holes. The first threaded rods pass through and are threadedly connected to the sliding rods fixedly connected to the top of the adjusting plates. A first worm gear is fixedly installed on one side of each first threaded rod. A first worm meshes with the outer side of each first worm gear. A gear is fixedly installed on the top of each first worm. The first threaded rods, first worm gears, first worms, and gears are all rotatably connected to the screen plates.

[0010] As a preferred technical solution of this application, a toothed ring is provided inside the two screen plates and outside the multiple through holes, and the toothed ring meshes with a gear. Multiple fixing plates are provided inside the two screen plates. Multiple racks are fixedly installed on one side of each of the multiple fixing plates, and the racks mesh with a gear. A connecting plate is fixedly installed between two adjacent fixing plates. The multiple toothed rings, fixing plates, racks and connecting plates are all slidably connected to the screen plates. Multiple first electric telescopic rods are fixedly installed inside the two screen plates, and the output end of the first electric telescopic rod is fixedly connected to the connecting plate.

[0011] As a preferred technical solution of this application, guide rods are fixedly installed on the side of the plurality of adjustment plates away from the through holes, and the plurality of guide rods pass through the sliding rods fixedly connected to the bottom of the plurality of adjustment plates and are slidably connected thereto. Two sealing rings are fixedly installed on the inner walls of the two screen plates and inside the plurality of through holes.

[0012] As a preferred technical solution of this application, each of the two screen plates is provided with a base and a U-shaped plate on its corresponding sides. Each of the two bases is provided with a pressure plate on the side near the screen plate. Each of the two bases is provided with two second electric telescopic rods inside. Multiple second electric telescopic rods pass through the base and are fixedly connected to it. The output end of the second electric telescopic rod is fixedly connected to the pressure plate. Two inserts are fixedly installed at the bottom of each of the two pressure plates. The inserts are inserted into the inside of the screen plate and are slidably connected to it. Multiple inserts are slidably connected to the base.

[0013] As a preferred technical solution of this application, both U-shaped plates are fixedly connected to the screening box, both sieve plates are inserted into the U-shaped plates and slidably connected thereto, and the output ends of the plurality of vibration motors are fixedly connected to the base and the U-shaped plates respectively;

[0014] As a preferred technical solution of this application, support plates are provided on both sides of the bottom of the two screen plates. T-shaped rods are fixedly installed on the side of the support plates that are far apart from each other. Multiple T-shaped rods and support plates pass through one side of the screening box and are slidably connected thereto. Multiple return springs are fixedly installed on the side of the support plates that are far apart from each other. The ends of the multiple return springs that are far away from the support plates are fixedly connected to the screening box.

[0015] As a preferred technical solution of this application, rubber pads are fixedly installed inside the screening box and at the bottom of multiple vibration motors, and baffles are fixedly installed on the top of multiple support plates, and the baffles are slidably connected to the screening box.

[0016] As a preferred technical solution of this application, a controller is embedded on one side of the screening box. The controller is electrically connected to the first electric telescopic rod, the vibration motor and the second electric telescopic rod. A feeding frame is fixedly installed on one side of the screening box, and the screening box has a slot that matches the feeding frame.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] In the scheme of this application:

[0019] (1) By setting up an auxiliary structure, the size of the through hole of the screen plate can be flexibly adjusted according to actual needs, so as to achieve precise screening of fertilizer particles of different sizes, which improves the flexibility and applicability of screening. At the same time, the vibration motor drives the screen plate installed in the base and U-shaped plate to vibrate, which improves the screening efficiency.

[0020] (2) By controlling the extension and retraction of the second electric telescopic rod, the pressure plate can drive the insert block to contact the screen plate and squeeze it, so as to realize the quick installation and disassembly of the screen plate and the base, which facilitates the replacement and maintenance of the screen plate and reduces the maintenance cost and time of the equipment. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a front sectional view of the present invention.

[0023] Figure 3 This is a schematic diagram of the auxiliary structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the internal structure of the sieve plate of this utility model;

[0025] Figure 5 This is a partial structural diagram of the present invention.

[0026] Explanation of reference numerals in the accompanying drawings: 1. Screening box; 2. Screen plate; 3. Adjusting plate; 4. Slide rod; 5. First threaded rod; 6. First worm gear; 7. First worm; 8. Gear; 9. Gear ring; 10. Fixing plate; 11. Rack; 12. Connecting plate; 13. First electric telescopic rod; 14. Guide rod; 15. Vibration motor; 16. Base; 17. Second electric telescopic rod; 18. Pressure plate; 19. Insert block; 20. U-shaped plate; 21. T-shaped rod; 22. Support plate; 23. Return spring; 24. Baffle; 25. Controller. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings.

[0028] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] Example 1: Please refer to the appendix of the instruction manual. Figure 1-3 A high-efficiency fertilizer screening device includes a screening box 1. The screening box 1 contains two screen plates 2. Two vibrating motors 15 are installed inside the screening box 1, located on both sides below the two screen plates 2. Multiple through holes are provided on each of the screen plates 2. Each through hole contains an auxiliary structure, including multiple adjusting plates 3. The adjusting plates 3 are slidably connected to the screen plates 2 and the through holes. Sliding rods 4 are fixedly installed on the opposite sides of the adjusting plates 3 away from the through holes. The sliding rods 4 are slidably connected to the screen plates 2. A first threaded rod 5 is provided on the side of each adjusting plate 3 away from the through holes. The first threaded rods 5 pass through the sliding rods 4 fixedly connected to the top of the adjusting plates 3 and are threadedly connected to them. A first worm gear 6 is fixedly installed on one side of each first threaded rod 5. A first worm 7 meshes with the outer side of each first worm gear 6. A gear 8 is fixedly installed on the top of each first worm 7. The first threaded rods 5, first worm gear 6, first worm 7, and gear 8 are all rotatably connected to the screen plates 2.

[0034] In this embodiment of the present invention, gear rings 9 are provided inside the two sieve plates 2 and outside the multiple through holes. The gear rings 9 mesh with gears 8. Multiple fixing plates 10 are provided inside the sieve plates 2. Multiple racks 11 are fixedly installed on one side of the fixing plates 10. The racks 11 mesh with gears 8. A connecting plate 12 is fixedly installed between two adjacent fixing plates 10. The gear rings 9, fixing plates 10, racks 11 and connecting plates 12 are all slidably connected to the sieve plates 2. Multiple first electric telescopic rods 13 are fixedly installed inside the two sieve plates 2. The output end of the first electric telescopic rod 13 is fixedly connected to the connecting plate 12. By controlling the extension and retraction of the first electric telescopic rod 13, the connecting plate 12 is moved, which in turn causes the fixing plates 10 and racks 11 to move. The racks 11 mesh with gears 8, which drives gears 8 to rotate. Gears 8 then drive the first worm 7, the first worm wheel 6 and the first threaded rod 5 to rotate. The rotation of the first threaded rod 5 causes the adjusting plate 3 to slide in the through hole, thereby adjusting the size of the through hole and realizing the adjustment of the sieve particle size.

[0035] Example 2: Please refer to the appendix of the instruction manual. Figure 3-5 In a preferred embodiment of this utility model, toothed rings 9 are provided inside the two sieve plates 2 and outside the multiple through holes, and the toothed rings 9 mesh with gears 8. Multiple fixing plates 10 are provided inside the two sieve plates 2. Multiple racks 11 are fixedly installed on one side of the multiple fixing plates 10, and the racks 11 mesh with gears 8. A connecting plate 12 is fixedly installed between two adjacent fixing plates 10. The multiple toothed rings 9, fixing plates 10, racks 11 and connecting plates 12 are all slidably connected to the sieve plates 2. Multiple first electric telescopic rods 13 are fixedly installed inside the two sieve plates 2, and the output end of the first electric telescopic rod 13 is fixedly connected to the connecting plate 12.

[0036] Guide rods 14 are fixedly installed on the side of multiple adjusting plates 3 away from the through holes. Multiple guide rods 14 pass through and slide rods 4 fixedly connected to the bottom of multiple adjusting plates 3. Two sealing rings are fixedly installed on the inner wall of the two screen plates 2 and inside the multiple through holes.

[0037] Each of the two screen plates 2 has a base 16 and a U-shaped plate 20 on its corresponding sides. Each of the two bases 16 has a pressure plate 18 on the side closest to the screen plate 2. Each of the two bases 16 has two second electric telescopic rods 17 inside. Multiple second electric telescopic rods 17 pass through the base 16 and are fixedly connected to it. The output end of the second electric telescopic rod 17 is fixedly connected to the pressure plate 18. Two inserts 19 are fixedly installed at the bottom of each of the two pressure plates 18. The inserts 19 are inserted into the screen plate 2 and are slidably connected to it. Multiple inserts 19 are slidably connected to the base 16.

[0038] Both U-shaped plates 20 are fixedly connected to the screening box 1, and both sieve plates 2 are inserted into the U-shaped plates 20 and slidably connected to them. The output ends of multiple vibration motors 15 are fixedly connected to the base 16 and the U-shaped plates 20 respectively.

[0039] Support plates 22 are provided on both sides of the bottom of the two sieve plates 2. T-shaped rods 21 are fixedly installed on the opposite sides of the support plates 22. Multiple T-shaped rods 21 and support plates 22 pass through one side of the screening box 1 and are slidably connected to it. Multiple return springs 23 are fixedly installed on the opposite sides of the support plates 22. The ends of the multiple return springs 23 away from the support plates 22 are fixedly connected to the screening box 1.

[0040] Rubber pads are fixedly installed inside the screening box 1 and at the bottom of multiple vibration motors 15. Baffles 24 are fixedly installed on the top of multiple support plates 22 and are slidably connected to the screening box 1.

[0041] A controller 25 is embedded on one side of the screening box 1. The controller 25 is electrically connected to the first electric telescopic rod 13, the vibration motor 15, and the second electric telescopic rod 17. A feeding frame is fixedly installed on one side of the screening box 1, and the screening box 1 has a slot that matches the feeding frame.

[0042] In this embodiment of the invention, guide rods 14 are fixedly installed on the side of each of the multiple adjusting plates 3 away from the through holes. The guide rods 14 pass through and are slidably connected to the slide rods 4 fixedly connected to the bottom of the adjusting plates 3, providing guidance and stable support for the sliding of the adjusting plates 3. Two sealing rings are fixedly installed on the inner walls of the two sieve plates 2 and inside the multiple through holes to prevent fertilizer particles from leaking out from the gaps between the sieve plates 2 and the adjusting plates 3.

[0043] By controlling the extension and retraction of the second electric telescopic rod 17, the pressure plate 18 can drive the insert block 19 to insert or remove the screen plate 2, realizing the quick installation and disassembly of the screen plate 2 and the base 16. Both U-shaped plates 20 are fixedly connected to the screening box 1, and both screen plates 2 are inserted into the interior of the U-shaped plates 20 and slidably connected thereto, providing support and guidance for the screen plates 2. The output ends of multiple vibrating motors 15 are fixedly connected to the base 16 and the U-shaped plates 20 respectively. When the vibrating motors 15 are working, they drive the screen plates 2 to vibrate, improving screening efficiency.

[0044] Rubber pads are fixedly installed inside the screening box 1 and at the bottom of multiple vibrating motors 15 to further reduce the vibration and noise generated when the vibrating motors 15 are working. Multiple support plates 22 are slidably connected to the screening box 1 to support the screen plate 2. At the same time, by pulling the T-shaped rod 21, the support plates 22 can be moved laterally to facilitate the disassembly of the screen plate 2.

[0045] Example 3: Please refer to the appendix of the instruction manual. Figure 5 In a preferred embodiment of this utility model, a servo motor is fixedly installed inside the screening box 1, and a second worm is fixedly installed at the output end of the servo motor. Two second worm wheels mesh with the outer side of the second worm, and a second threaded rod is fixedly installed on one side of each of the two second worm wheels. The second worm, the two second worm wheels, and the second threaded rod are all rotatably connected to the screening box 1. Slide plates are provided above the two screen plates 2. The two slide plates are inserted into the interior of the screening box 1 and slidably connected to them. The two second threaded rods pass through the two slide plates and are threadedly connected to them. A frame is fixedly installed at the bottom of the two slide plates, and a brush roller is rotatably connected to the two frames. The controller 25 is electrically connected to the servo motor.

[0046] In this embodiment of the utility model, when the servo motor is working, it drives the second worm gear to rotate, the second worm gear drives the second worm wheel and the second threaded rod to rotate, the second threaded rod drives the slide plate to move in the screening box 1, the slide plate drives the frame and the brush roller to move, the brush roller can clean the fertilizer particles on the screen plate 2 to prevent the screen holes from being blocked, and the device is provided with heat dissipation holes that cooperate with the servo motor.

[0047] Working principle: The controller 25 is used to debug the first electric telescopic rod 13, the vibration motor 15, the second electric telescopic rod 17, and the servo motor to ensure that each component can work normally. According to the required fertilizer particle size to be screened, the controller 25 controls the extension and retraction of the first electric telescopic rod 13 to adjust the size of the through holes on the screen plate 2.

[0048] The fertilizer to be screened is poured into the screening box 1 through the feed frame, and the fertilizer falls onto the screen plate 2. The vibration motor 15 is started, and the vibration motor 15 drives the screen plate 2 to vibrate, causing the fertilizer particles to jump continuously on the screen plate 2. Fertilizer particles smaller than the screen holes fall through the screen holes, thus achieving screening.

[0049] When it is necessary to change the screening particle size, the controller 25 controls the extension and retraction of the first electric telescopic rod 13, which drives the connecting plate 12 to move, thereby causing the fixed plate 10 and the rack 11 to move. The rack 11 meshes with the gear 8, driving the gear 8 to rotate. The gear 8 then drives the first worm 7, the first worm wheel 6 and the first threaded rod 5 to rotate. The rotation of the first threaded rod 5 causes the adjusting plate 3 to slide in the through hole, thereby adjusting the size of the through hole and completing the adjustment of the screening particle size.

[0050] When the screen plate 2 needs to be replaced or maintained, the controller 25 controls the second electric telescopic rod 17 to retract, so that the pressure plate 18 drives the insert block 19 to release the pressure on the screen plate 2. Then the screen plate 2 is taken out from the U-shaped plate 20 for replacement or maintenance. After maintenance, the screen plate 2 is inserted into the U-shaped plate 20, and the controller 25 controls the second electric telescopic rod 17 to extend, so that the pressure plate 18 drives the insert block 19 to insert into the screen plate 2, thus completing the installation of the screen plate 2.

[0051] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims

1. A high-efficiency fertilizer screening device, comprising a screening box (1), characterized in that, The screening box (1) is equipped with two screen plates (2) inside. Two vibration motors (15) are installed inside the screening box (1) on both sides below the two screen plates (2). Multiple through holes are opened on each of the two screen plates (2), and auxiliary structures are installed inside each of the multiple through holes. The auxiliary structures include multiple adjusting plates (3). The multiple adjusting plates (3) are slidably connected to the screen plates (2) and the through holes. Sliding rods (4) are fixedly installed on the corresponding sides of the multiple adjusting plates (3) away from the through holes. The multiple sliding rods (4) are slidably connected to the screen plates (2). Each of the adjusting plates (3) is provided with a first threaded rod (5) on the side away from the through hole. Multiple first threaded rods (5) pass through and are threadedly connected to the slide rods (4) fixedly connected to the top of multiple adjusting plates (3). A first worm wheel (6) is fixedly installed on one side of each of the multiple first threaded rods (5). A first worm (7) is meshed on the outer side of each of the multiple first worm wheels (6). A gear (8) is fixedly installed on the top of each of the multiple first worms (7). Multiple first threaded rods (5), first worm wheels (6), first worms (7) and gears (8) are rotatably connected to the sieve plate (2).

2. The high-efficiency fertilizer screening device according to claim 1, characterized in that, A gear ring (9) is provided inside the two screen plates (2) and outside the multiple through holes, and the gear ring (9) meshes with the gear (8). A number of fixing plates (10) are provided inside the two screen plates (2). A number of racks (11) are fixedly installed on one side of the multiple fixing plates (10), and the racks (11) mesh with the gear (8). A connecting plate (12) is fixedly installed between two adjacent fixing plates (10). The multiple gear rings (9), fixing plates (10), racks (11) and connecting plates (12) are all slidably connected to the screen plates (2). A number of first electric telescopic rods (13) are fixedly installed inside the two screen plates (2), and the output end of the first electric telescopic rod (13) is fixedly connected to the connecting plate (12).

3. The high-efficiency fertilizer screening device according to claim 1, characterized in that, Each of the multiple adjustment plates (3) has a guide rod (14) fixedly installed on the side away from the through hole. Each of the multiple guide rods (14) passes through the slide rod (4) fixedly connected to the bottom of the multiple adjustment plates (3) and slides with it. Each of the two screen plates (2) has two sealing rings fixedly installed on the inner wall and inside the multiple through holes.

4. The high-efficiency fertilizer screening device according to claim 1, characterized in that, Each of the two screen plates (2) is provided with a base (16) and a U-shaped plate (20) on its corresponding sides. Each of the two bases (16) is provided with a pressure plate (18) on the side of the screen plate (2). Each of the two bases (16) is provided with two second electric telescopic rods (17). Multiple second electric telescopic rods (17) pass through the base (16) and are fixedly connected to it. The output end of the second electric telescopic rod (17) is fixedly connected to the pressure plate (18). Two inserts (19) are fixedly installed at the bottom of each of the two pressure plates (18). The inserts (19) are inserted into the screen plate (2) and are slidably connected to it. Multiple inserts (19) are slidably connected to the base (16).

5. The high-efficiency fertilizer screening device according to claim 4, characterized in that, Both U-shaped plates (20) are fixedly connected to the screening box (1), and both sieve plates (2) are inserted into the U-shaped plates (20) and slidably connected thereto. The output ends of the multiple vibration motors (15) are fixedly connected to the base (16) and the U-shaped plates (20) respectively.

6. The high-efficiency fertilizer screening device according to claim 1, characterized in that, Support plates (22) are provided on both sides of the bottom of the two screen plates (2). T-shaped rods (21) are fixedly installed on the side of the support plates (22) that are far apart from each other. Multiple T-shaped rods (21) and support plates (22) pass through one side of the screening box (1) and are slidably connected to it. Multiple return springs (23) are fixedly installed on the side of the support plates (22) that are far apart from each other. The end of the multiple return springs (23) that is far away from the support plates (22) is fixedly connected to the screening box (1).

7. The high-efficiency fertilizer screening device according to claim 6, characterized in that, Rubber pads are fixedly installed inside the screening box (1) and at the bottom of multiple vibration motors (15). Baffles (24) are fixedly installed on the top of multiple support plates (22), and the baffles (24) are slidably connected to the screening box (1).

8. The high-efficiency fertilizer screening device according to claim 1, characterized in that, A controller (25) is embedded on one side of the screening box (1). The controller (25) is electrically connected to the first electric telescopic rod (13), the vibration motor (15), and the second electric telescopic rod (17). A feeding frame is fixedly installed on one side of the screening box (1), and the screening box (1) has a slot that matches the feeding frame.

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