Agricultural planting fertilizer processing and screening device and use method

Through the cooperation of multi-stage screening frame structure and hydraulic cylinder, the problem of low screening efficiency of existing fertilizer processing devices is solved, efficient multi-stage screening and blockage prevention is achieved, and the working efficiency of fertilizer processing is improved.

CN120394349APending Publication Date: 2025-08-01NINGXIA JUCHEN TECHNOLOGY SERVICE CO LTD
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Patent Information

Application Number
CN202510842450.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-23
Publication Date
2025-08-01

AI Technical Summary

Technical Problem

The existing agricultural fertilizer processing equipment is inefficient during the screening process and cannot effectively perform multi-stage screening, resulting in multiple screenings requiring them, affecting work efficiency.

Method used

The multi-stage screening frame structure is adopted, and the movement of the limit push rod and the screening frame is driven by the motor drive cam. Combined with the cooperation of the hydraulic cylinder and the slider, multi-stage screening is achieved, and the amount of discharge is controlled through the electric push rod to prevent blockage.

Benefits of technology

It realizes efficient screening of different types and particle size fertilizers, improves work efficiency, prevents blockage, controls uniform feeding volume, and improves the practicality of the device.

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Abstract

The invention relates to the technical field of agricultural planting, and discloses a fertilizer processing and screening device for agricultural planting and a use method.The fertilizer processing and screening device comprises a screening box and a feeding hopper, the top of the screening box communicates with a spiral sliding way, two placement frames are fixed to the two wall faces of an inner cavity of the screening box correspondingly, and first screening frames are slidably arranged in the placement frames correspondingly; a second limiting hole and a first limiting hole are formed in the tops and the bottoms of the two ends of the bottom containing frame and the top containing frame correspondingly, limiting push rods are inserted into the first limiting hole and the second limiting hole, and first springs sleeve the limiting push rods correspondingly. A motor is fixed to the rear side of the screening box, a cam is fixed to the output shaft end of the motor, and a sliding frame is fixed to an inner cavity of the screening box. A plurality of reset springs are fixed in the sliding frame, a second screening frame is arranged in the sliding frame in a sliding mode, and a sliding groove is formed in the screening box. According to the fertilizer screening device, the fertilizer is preliminarily screened through cooperation of the motor, the cam, the screening frame and the limiting push rod, the fertilizer is screened again through cooperation of the second screening frame, the reset spring and the sliding frame, and the working efficiency is improved.
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Description

Technical Field

[0001] The present invention relates to the technical field of agricultural planting, and particularly relates to a fertilizer processing and screening device for agricultural planting and a using method thereof. Background Art

[0002] Fertilizer refers to a substance that provides one or more essential nutrient elements for plants and improves the soil properties and soil fertility level. It is one of the material bases for agricultural production, mainly including ammonium phosphate fertilizers, water-soluble fertilizers of macronutrients, medium element fertilizers, biological fertilizers, organic fertilizers, multi-dimensional field energy concentrated organic fertilizers, etc. At present, some materials need to be screened by a screening device during the processing of agricultural fertilizers.

[0003] After retrieval, the publication (announcement) number: CN213914763 discloses an agricultural fertilizer processing and screening device, including a housing. The bottom of the housing is fixedly connected with a bracket, and the bottoms of two brackets are fixedly connected with a bottom plate. The left side of the back of the housing is fixedly connected with a first motor, and the front side of the output end of the first motor is fixedly connected with a first rotating rod. The front end of the first rotating rod penetrates to the front side of the inner cavity of the housing and is sleeved with a cam. By setting the housing, bracket, bottom plate, first motor, first rotating rod, cam, screening box, screening holes, limiting rod, first spring, stop block, fixed box, push plate, push rod, second spring, equipment box, sliding rod, sliding sleeve, lifting box, second motor, second rotating rod, stirring rod, fixing plate, third motor, rotating disk and connecting frame, this utility model solves the problem of low screening efficiency of the existing agricultural fertilizer processing and screening device. This agricultural fertilizer processing and screening device has the advantage of high screening efficiency.

[0004] In the above-mentioned prior art solution, the device only involves a single screening box and does not perform multi-stage screening. Modern agricultural fertilizer screening usually requires classification according to particle size, which requires multiple screens or screening boxes of different sizes to process materials of different particle sizes. Therefore, when processing fertilizers of different types or particle sizes, secondary screening may be required, which is not conducive to improving work efficiency.

[0005] Therefore, we propose a fertilizer processing and screening device for agricultural planting and a using method thereof. Summary of the Invention

[0006] The present invention mainly solves the technical problems existing in the above-mentioned prior art, and provides a fertilizer processing and screening device for agricultural planting and a using method thereof.

[0007] To achieve the above object, the present invention adopts the following technical solutions. A fertilizer processing and screening device for agricultural planting includes a screening box and a feeding hopper. A spiral chute is connected to the top of the screening box. Two groups of placement frames are fixed on both wall surfaces inside the screening box. A first screening frame slides in each placement frame. Limiting holes two are respectively opened at the top and bottom of both ends of the bottom and top placement frames, and limiting holes one are respectively opened at the top and bottom of both ends of the bottom and top placement frames. Limiting push rods are inserted into the limiting holes one and two, and a first spring is sleeved on each limiting push rod. A motor is fixed at the rear side of the screening box, a cam is fixed at the end of the output shaft of the motor, a sliding frame is fixed inside the screening box, a plurality of reset springs are fixed inside the sliding frame, a second screening frame slides inside the sliding frame, and a chute is opened on the screening box.

[0008] Preferably, a displacement groove is opened on the rear side wall inside the screening box. A hydraulic cylinder is fixedly connected to one side wall inside the displacement groove. A slider is fixedly connected to the extending end of the hydraulic cylinder. A mounting rod is fixedly connected to the slider. Fixing frames are respectively fixed at both ends of the mounting rod. Limiting grooves are respectively opened on the front and rear sides of the fixing frames. A plurality of second springs are respectively fixed inside the fixing frames. Limiting plates are respectively fixed at the other ends of the second springs. A plurality of dredging shovels are respectively fixed at the bottoms of the limiting plates.

[0009] Preferably, a through groove is opened on one side wall surface of the feeding hopper. An L-shaped connecting plate is fixedly connected to the wall surface of the feeding hopper corresponding to the through groove. An electric push rod is fixedly connected to the wall surface of the connecting plate close to the through groove. A quantitative plate is fixedly connected to the extending shaft end of the electric push rod.

[0010] Preferably, the placement frame is of a U-shaped structure, and the aperture diameters of the sieve holes on the first screening frame decrease in sequence.

[0011] Preferably, the cam is in contact with the bottom of the bottom first screening frame.

[0012] Preferably, one side of the second screening frame is fixedly connected to the reset spring, and the chute is adapted to the second screening frame.

[0013] Preferably, the mounting rod is of a C-shaped structure, and both ends of the limiting plate are limited inside the inner cavity of the limiting groove.

[0014] A using method of a fertilizer processing and screening device for agricultural planting includes the following steps:

[0015] S1: Put agricultural fertilizer from the feeding hopper. The fertilizer enters the first screening frame through the spiral chute, and then can cover the entire surface of the top first screening frame. At the same time, start the motor to drive the cam to rotate. Since the bottom first screening frame moves upward to drive the limiting push rod to apply an upward thrust, thereby driving the upper first screening frame upward, and then screening the agricultural fertilizer in the bottom and upper first screening frames. The fertilizer with a large diameter is located in the top first screening frame, and the fertilizer with a medium diameter falls into the bottom first screening frame;

[0016] S2: Pull the second screening box. Under the cooperation of the second screening box, the return spring, and the sliding box, screen the agricultural fertilizer again.

[0017] S3: Start the hydraulic cylinder to drive the slider to slide in the displacement groove, and then drive the displacement of the mounting rod. While displacing, the second spring and the dredging shovel cooperate to dredge the agricultural fertilizer in the inner cavity of the first screening box to prevent the first screening box from being blocked. When it is necessary to take out the upper and lower first screening boxes, lift the limiting plate. At this time, the second spring is squeezed and contracted, which is convenient for taking out the first screening box.

[0018] S4: Start the electric push rod to drive the quantitative plate to displace in the inner cavity of the through groove, thereby controlling the feeding amount of the agricultural fertilizer.

[0019] The present invention provides a fertilizer processing and screening device and a using method for agricultural planting. It has the following

[0020] Beneficial effects:

[0021] 1. For the fertilizer processing and screening device and the using method for agricultural planting, through the cooperation of the motor, the cam, the screening box, and the limiting push rod, the fertilizer is initially screened, and through the cooperation of the second screening box, the return spring, and the sliding box, the fertilizer is screened again. Thus, when dealing with fertilizers of different types or particle sizes, it is beneficial to improve the working efficiency.

[0022] 2. For the fertilizer processing and screening device and the using method for agricultural planting, through the cooperation of the hydraulic cylinder, the slider, and the sliding groove, the displacement of the fixed frame is driven, and through the cooperation of the spring and the dredging shovel, the agricultural fertilizer in the inner cavity of the first screening box is dredged to prevent the first screening box from being blocked, improving the practicability of the device.

[0023] 3. For the fertilizer processing and screening device and the using method for agricultural planting, through the electric push rod, the quantitative plate is driven to displace in the inner cavity of the through groove, thereby controlling the feeding amount of the agricultural fertilizer.

[0024] 4. For the fertilizer processing and screening device and the using method for agricultural planting, through the setting of the spiral chute, the feeding speed of the agricultural fertilizer is buffered, so that the agricultural fertilizer is laid more evenly on the first screening box. Description of the Drawings

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary. For those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.

[0026] The structures, proportions, sizes, etc. illustrated in this specification are intended solely to complement the contents disclosed herein and to facilitate understanding and reading by persons skilled in the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, without affecting the efficacy and objectives of the present invention, shall remain within the scope of the technical contents disclosed herein.

[0027] Figure 1 It is a schematic three-dimensional diagram of the structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the back of the structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the inner cavity of the screening box structure of the present invention;

[0030] Figure 4 This is a detailed schematic diagram of the fixing frame structure of the present invention;

[0031] Figure 5 This is a schematic diagram of the disassembly of the mounting rod and placement frame structure of the present invention.

[0032] Legend:

[0033] 1. Screening box; 101. Displacement slot; 2. Feed hopper; 201. Through slot; 202. Connecting plate; 203. Electric push rod; 204. Dosing plate; 3. Motor; 301. Cam; 4. Spiral slide; 5. Placement frame; 501. Screening frame one; 6. Slide frame; 601. Return spring; 602. Screening frame two; 603. Slide; 7. Limit push rod; 701. Limit hole one; 702. Limit hole two; 703. Spring one; 8. Hydraulic cylinder; 801. Slider; 802. Mounting rod; 9. Fixed frame; 901. Limit slot; 902. Spring two; 903. Limit plate; 904. Dredging shovel. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] Example 1: A fertilizer processing and screening device for agricultural planting, such as Figures 1 - 5As shown in the figure, it includes a screening box 1. A hopper 2 with a Y-shaped structure is connected to the top of the screening box 1. A spiral chute 4 is connected to the inner cavity at the top of the screening box 1 and at the discharge end of the hopper 2. Two groups of U-shaped placement frames 5 are fixedly connected to the two inner walls of the screening box 1 at equal distances. A first screening frame 501 is slidably connected to the inner cavities of the two groups of placement frames 5. The aperture of the sieve holes on the first screening frame 501 decreases successively, so as to screen out agricultural fertilizers in order from large to small. Two limiting holes two 702 are opened at the top of both ends of the bottom placement frame 5. Limiting holes one 701 are opened at the bottom of the upper placement frame 5 at positions corresponding to the limiting holes two 702. Limiting push rods 7 are inserted into the inner cavities of the limiting holes one 701 and the limiting holes two 702. A first spring 703 is sleeved on each of the limiting push rods 7. The number of the limiting push rods 7 is four. A motor 3 is fixedly connected to the rear side wall of the screening box 1. A cam 301 is fixedly installed at the output shaft end of the motor 3 and is located in the inner cavity of the screening box 1. The cam 301 is in contact with the bottom of the bottom first screening frame 501. An L-shaped sliding frame 6 is fixedly connected to the inner cavity of the screening box 1 and below the bottom placement frame 5. A plurality of return springs 601 are fixedly connected to the inner cavity of the sliding frame 6. A second screening frame 602 is slidably connected to one end of the return spring 601 and is located in the inner cavity of the sliding frame 6. One side of the second screening frame 602 is fixedly connected to the return spring 601. A chute 603 is opened on the side wall of the screening box 1 away from the return spring 601 and at a position adapted to the second screening frame 602.

[0036] Embodiment 2: A fertilizer processing and screening device for agricultural planting, as Figures 1 - 5As shown in the figure, it includes a screening box 1. A hopper 2 with a Y-shaped structure is connected to the top of the screening box 1. A spiral chute 4 is connected to the inner cavity at the top of the screening box 1 and at the discharge end of the hopper 2. Two groups of U-shaped placement frames 5 are fixedly connected to the two inner walls of the screening box 1 at equal distances. A first screening frame 501 is slidably connected to the inner cavities of the two groups of placement frames 5. The pore diameters of the sieve holes on the first screening frame 501 decrease in sequence, so as to screen out agricultural fertilizers in order from large to small. Two limiting holes two 702 are opened at the top of both ends of the bottom placement frame 5. Limiting holes one 701 are opened at the bottom of the upper placement frame 5 and at positions corresponding to the limiting holes two 702. Limiting push rods 7 are inserted into the inner cavities of the limiting holes one 701 and the limiting holes two 702. A first spring 703 is sleeved on each limiting push rod 7. The number of the limiting push rods 7 is four. A motor 3 is fixedly connected to the rear side wall of the screening box 1. A cam 301 is fixedly installed at the output shaft end of the motor 3 in the inner cavity of the screening box 1. The cam 301 is in contact with the bottom of the bottom first screening frame 501. An L-shaped sliding frame 6 is fixedly connected to the inner cavity of the screening box 1 and below the bottom placement frame 5. A plurality of reset springs 601 are fixedly connected to the inner cavity of the sliding frame 6. A second screening frame 602 is slidably connected to one end of the reset spring 601 in the inner cavity of the sliding frame 6. One side of the second screening frame 602 is fixedly connected to the reset spring 601. A chute 603 is opened on the side wall of the screening box 1 away from the reset spring 601 and at a position adapted to the second screening frame 602.

[0037] A displacement groove 101 is opened on the rear side wall of the inner cavity of the screening box 1. A hydraulic cylinder 8 is fixedly connected to one side wall of the inner cavity of the displacement groove 101. An extension end of the hydraulic cylinder 8 is fixedly connected to a slider 801. A C-shaped mounting rod 802 is fixedly connected to the wall of the slider 801 close to the placement frame 5. U-shaped fixing frames 9 are fixedly connected to both ends of the mounting rod 802 close to the upper and bottom first screening frames 501. Limiting grooves 901 are opened on the front, rear, left and right sides of the two fixing frames 9. A plurality of second springs 902 are fixedly connected to the inner cavities of the two fixing frames 9. The other ends of the second springs 902 are fixedly connected to limiting plates 903. Both ends of the limiting plates 903 are limited in the inner cavities of the limiting grooves 901. A plurality of dredging shovels 904 are fixedly connected to the bottoms of the limiting plates 903.

[0038] Embodiment 3: A fertilizer processing and screening device for agricultural planting, such as Figures 1 - 5As shown in the figure, it includes a screening box 1. A hopper 2 with a Y-shaped structure is connected to the top of the screening box 1. A spiral chute 4 is connected to the inner cavity at the top of the screening box 1 and at the discharge end of the hopper 2. Two groups of U-shaped placement frames 5 are fixedly connected to the two inner walls of the screening box 1 at equal distances. A screening frame one 501 is slidably connected to the inner cavity of each of the two groups of placement frames 5. The aperture of the sieve holes on the screening frame one 501 decreases in sequence, so as to screen out agricultural fertilizers in descending order. Two limiting holes two 702 are opened at the top of both ends of the bottom placement frame 5. Limiting holes one 701 are opened at the bottom of the upper placement frame 5 and at positions corresponding to the limiting holes two 702. Limiting push rods 7 are inserted into the inner cavities of the limiting holes one 701 and the limiting holes two 702. A first spring 703 is sleeved on each of the limiting push rods 7. The number of the limiting push rods 7 is four. A motor 3 is fixedly connected to the rear side wall of the screening box 1. A cam 301 is fixedly installed at the output shaft end of the motor 3 and located in the inner cavity of the screening box 1. The cam 301 is in contact with the bottom of the bottom screening frame one 501. An L-shaped sliding frame 6 is fixedly connected to the inner cavity of the screening box 1 and below the bottom placement frame 5. A plurality of return springs 601 are fixedly connected to the inner cavity of the sliding frame 6. A screening frame two 602 is slidably connected to one end of the return spring 601 and located in the inner cavity of the sliding frame 6. One side of the screening frame two 602 is fixedly connected to the return spring 601. A chute 603 is opened on the side wall of the screening box 1 away from the return spring 601 and at a position adapted to the screening frame two 602.

[0039] A displacement groove 101 is opened on the rear side wall of the inner cavity of the screening box 1. A hydraulic cylinder 8 is fixedly connected to one side wall of the inner cavity of the displacement groove 101. A slider 801 is fixedly connected to the extending end of the hydraulic cylinder 8. An installation rod 802 with a C-shaped structure is fixedly connected to the wall of the slider 801 close to the placement frame 5. U-shaped fixing frames 9 are fixedly connected to both ends of the installation rod 802 close to the upper and bottom screening frames one 501. Limiting grooves 901 are opened on the front, rear, left and right sides of the two fixing frames 9. A plurality of second springs 902 are fixedly connected to the inner cavities of the two fixing frames 9. The other ends of the second springs 902 are fixedly connected to limiting plates 903. The two ends of the limiting plates 903 are limited in the inner cavities of the limiting grooves 901. A plurality of dredging shovels 904 are fixedly connected to the bottoms of the limiting plates 903.

[0040] A through groove 201 is opened on one side wall of the hopper 2. An L-shaped connecting plate 202 is fixedly connected to the wall of the hopper 2 corresponding to the through groove 201. An electric push rod 203 is fixedly connected to the wall of the connecting plate 202 close to the through groove 201. A quantitative plate 204 is fixedly connected to the extending shaft end of the electric push rod 203.

[0041] A using method of a fertilizer processing and screening device for agricultural planting includes the following steps:

[0042] S1: Put agricultural fertilizers into the feeding hopper 2. The fertilizers enter the first screening box 501 through the spiral chute 4, and then can cover the entire surface of the top first screening box 501. At the same time, start the motor 3 to drive the cam 301 to rotate. Since the bottom first screening box 501 moves upward and drives the limit push rod 7 to apply an upward thrust, the upper first screening box 501 is driven upward, and then the agricultural fertilizers in the bottom and upper first screening boxes 501 are screened. The fertilizers with larger diameters are located in the top first screening box 501, and the fertilizers with medium diameters fall into the bottom first screening box 501;

[0043] S2: Pull the second screening box 602, and screen the agricultural fertilizers again under the cooperation of the second screening box 602, the return spring 601 and the sliding frame 6;

[0044] S3: Start the hydraulic cylinder 8 to drive the slider 801 to slide in the displacement groove 101, and then drive the displacement of the mounting rod 802. At the same time of the displacement, the second spring 902 and the dredging shovel 904 cooperate to dredge the agricultural fertilizers in the inner cavity of the first screening box 501 to prevent the first screening box 501 from being blocked. When it is necessary to take out the upper and bottom first screening boxes 501, lift the limit plate 903 upward. At this time, the second spring 902 is squeezed and contracted, which is convenient to take out the first screening box 501;

[0045] S4: Start the electric push rod 203 to drive the quantitative plate 204 to displace in the inner cavity of the through groove 201, so as to control the feeding amount of agricultural fertilizers.

[0046] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A fertilizer processing and screening device for agricultural planting, comprising a screening box (1) and a feed hopper (2), characterized in that: The top of the screening box (1) is connected to a spiral chute (4). Two side walls inside the screening box (1) are each fixed with two groups of placement frames (5). A first screening frame (501) is slidably arranged in each placement frame (5). Limiting holes two (702) and limiting holes one (701) are respectively formed at the top and bottom of both ends of the top and bottom placement frames (5). A limiting push rod (7) is inserted into the limiting hole one (701) and the limiting hole two (702). A first spring (703) is sleeved on each limiting push rod (7). A motor (3) is fixed to the rear side of the screening box (1). A cam (301) is fixed to the output shaft end of the motor (3). A sliding frame (6) is fixed inside the screening box (1). A plurality of reset springs (601) are fixed inside the sliding frame (6). A second screening frame (602) is slidably arranged inside the sliding frame (6). A chute (603) is formed in the screening box (1).

2. The fertilizer processing and screening device for agricultural planting according to claim 1, wherein: A displacement groove (101) is formed in the rear side wall inside the screening box (1). A hydraulic cylinder (8) is fixedly connected to one side wall inside the displacement groove (101). A slider (801) is fixedly connected to the extending end of the hydraulic cylinder (8). A mounting rod (802) is fixedly connected to the slider (801). Fixing frames (9) are respectively fixed to both ends of the mounting rod (802). Limiting grooves (901) are formed on both the front and rear sides of the fixing frames (9). A plurality of second springs (902) are fixed inside each fixing frame (9). A limiting plate (903) is fixed to the other end of each second spring (902). A plurality of dredging shovels (904) are fixed to the bottom of each limiting plate (903).

3. A fertilizer processing and screening device for agricultural planting according to claim 1, characterized in that: A through groove (201) is formed in one side wall surface of the feed hopper (2). An L-shaped connecting plate (202) is fixedly connected to the wall surface of the feed hopper (2) corresponding to the through groove (201). An electric push rod (203) is fixedly connected to the wall surface of the connecting plate (202) close to the through groove (201). A quantitative plate (204) is fixedly connected to the extending shaft end of the electric push rod (203).

4. A fertilizer processing and screening device for agricultural planting according to claim 1, characterized in that: The placement frame (5) is of a U-shaped structure, and the pore diameters of the sieve holes on the first screening frame (501) gradually decrease in sequence.

5. The fertilizer processing and screening device for agricultural planting according to claim 1, characterized in that: The cam (301) is in contact with the bottom of the bottom first screening frame (501).

6. The fertilizer processing and screening device for agricultural planting according to claim 1, wherein: One side of the second screening frame (602) is fixedly connected to the reset spring (601), and the chute (603) is adapted to the second screening frame (602).

7. The fertilizer processing and screening device for agricultural planting according to claim 2, characterized in that: The mounting rod (802) is of a C-shaped structure, and both ends of the limiting plate (903) are limited in the inner cavity of the limiting groove (901).

8. A method for using a fertilizer processing and screening device for agricultural planting, characterized in that, A fertilizer processing and screening device for agricultural planting, comprising any one of the claims 1-7, includes the following steps: S1: Put agricultural fertilizers into the feed hopper (2). The fertilizers enter the first screening box (501) through the spiral chute (4), and then can cover the entire surface of the top first screening box (501). At the same time, start the motor (3) to drive the cam (301) to rotate. Since the bottom first screening box (501) moves upward to drive the limit push rod (7) to apply an upward thrust, the upper first screening box (501) is driven upward, and then the agricultural fertilizers in the bottom and upper first screening boxes (501) are screened. The fertilizers with larger diameters are located in the top first screening box (501), and the fertilizers with medium diameters fall into the bottom first screening box (501); S2: Pull the second screening box (602), and screen the agricultural fertilizers again under the cooperation of the second screening box (602), the return spring (601) and the sliding box (6); S3: Start the hydraulic cylinder (8) to drive the slider (801) to slide in the displacement groove (101), and then drive the displacement of the mounting rod (802). At the same time of displacement, the second spring (902) and the dredging shovel (904) cooperate to dredge the agricultural fertilizers in the inner cavity of the first screening box (501) to prevent the first screening box (501) from being blocked. When it is necessary to take out the upper and bottom first screening boxes (501), lift the limit plate (903). At this time, the second spring (902) is squeezed and contracted, which is convenient to take out the first screening box (501); S4: Start the electric push rod (203) to drive the quantitative plate (204) to displace in the inner cavity of the through groove (201), so as to control the feeding amount of agricultural fertilizers.

Citation Information

Patent Citations

  • Agricultural fertilizer processing and screening device

    CN213914763U