A screening device for fertilizer processing

Abstract

The present invention discloses a screening device for fertilizer processing, which relates to the technical field of fertilizer processing, including a box body, and supporting legs fixedly connected to the box body, and also including: a large particle screening frame, the large particle screening frame is slidably arranged in the box body, the large particle screening frame is used to screen out fertilizers with larger particles or agglomerated particles, and a fixed frame, the fixed frame is fixedly connected to the side of the box body. The present invention realizes that while screening the fertilizer, it can also extract gaseous impurities such as dust generated in the screening process, and the extracted dust and other gaseous impurities are discharged to the outside after filtering, thereby avoiding direct discharge of dust to the outside to pollute the environment, and the fertilizer screened by the large particle screening frame is screened again, so as to screen out fertilizers with larger and smaller particles, so as to obtain fertilizers with particle sizes within a certain range, and to optimize the utilization of fertilizers with different particle size ranges in the later stage.

Description

Technical Field

[0001] The invention relates to the technical field of fertilizer processing, in particular to a screening device for fertilizer processing. Background Art

[0002] Fertilizer refers to a type of substance that provides one or more essential nutrients for plants, improves soil properties, and increases soil fertility. It is one of the material bases of agricultural production. It mainly includes ammonium phosphate fertilizers, large-element water-soluble fertilizers, medium-element fertilizers, biological fertilizers, organic fertilizers, multi-dimensional field energy concentrated organic fertilizers, etc. After the fertilizers are produced, there will be good and bad fertilizers, so the fertilizers need to be screened through screening devices.

[0003] Because the existing screening device is not easy to screen out fertilizers with larger particles and fertilizers with smaller particles when screening fertilizers, and it is difficult to collect and process the screened fertilizers at the same time, and it is also difficult to extract and process the dust and other gas impurities generated during the screening process. The dust and other gas impurities generated during the screening process are directly discharged into the air, which can easily pollute the environment, so improvement is needed. Summary of the invention

[0004] The object of the present invention is to provide a screening device for fertilizer processing, which can not only screen the fertilizer, but also extract gaseous impurities such as dust generated in the screening process. The extracted gaseous impurities such as dust are discharged to the outside after filtering, thereby avoiding direct discharge of dust to the outside to pollute the environment. The device can also push the fertilizer that has been screened by the large particle screening frame into the small particle screening tube for re-screening, so as to screen out fertilizers with larger and smaller particles, obtain fertilizers with particle sizes within a certain range, and optimize the utilization of fertilizers with different particle size ranges in the later stage, thereby solving the problems raised in the above-mentioned turtle essence technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a screening device for fertilizer processing, comprising a box body, and supporting legs fixedly connected to the box body, and further comprising:

[0006] A large particle screening frame, which is slidably disposed in the box body and is used to screen out fertilizers with large particles or agglomerated particles;

[0007] A fixing frame, the fixing frame is fixedly connected to the side of the box body, a connecting pipe is fixedly connected between the fixing frame and the box body, and a feeding pipe is embedded in the connecting pipe;

[0008] A gas extraction component, which is arranged in the fixed frame and is used to extract gas impurities such as dust generated during the fertilizer screening process;

[0009] A connecting rope, wherein the connecting rope is arranged in the connecting pipe, one end of the connecting rope is fixedly connected to the large particle screening frame, and the other end of the connecting rope is fixedly connected to the gas extraction assembly. When the gas extraction assembly moves downward and upward to complete one gas extraction and discharge, the large particle screening frame is driven to move up and down once under the action of the connecting rope to screen the fertilizer;

[0010] A disturbance component is rotatably arranged in the large particle screening frame, and two tooth plates meshing with the disturbance component are fixedly connected to the top of the inner wall of the box. When the connecting rope pulls the large particle screening frame to move up and down, the disturbance component is driven to rotate under the cooperation of the tooth plates to achieve stirring of the fertilizer;

[0011] A discharge port, the discharge port is opened on the side of the box body near the bottom thereof, a small particle screening pipe is fixedly connected to the discharge port, and a material receiving cover is fixedly connected to the bottom of the small particle screening pipe;

[0012] The pushing assembly is arranged on the bottom of the inner wall of the box body, and is used to push the fertilizer that has been screened by the large particle screening frame to pass through the discharge port and enter the small particle screening tube for re-screening.

[0013] Preferably, the gas extraction assembly includes a piston plate slidably connected in a fixed frame, a forward and reverse motor is fixedly connected to the bottom of the fixed frame, the output end of the forward and reverse motor passes through the fixed frame and is fixedly connected to a screw, and the screw is threadedly connected to an internal threaded barrel connected to the piston plate.

[0014] Preferably, an air outlet pipe is embedded in the fixed frame, and an activated carbon filter and an air outlet one-way valve are fixedly connected inside the air outlet pipe.

[0015] Preferably, a channel for the connecting rope to pass through is opened on the inner wall of the vertical pipe on the connecting pipe, a sponge is arranged in the channel, an air intake one-way valve is fixedly connected to the end of the connecting pipe, and two guide rope wheels for changing the direction of the connecting rope are fixedly connected in the connecting pipe.

[0016] Preferably, the disturbance assembly comprises a rotating shaft rotatably connected to the large particle screening frame, the end of the rotating shaft is fixedly sleeved with a gear meshing with a toothed plate, and a plurality of stirring rods are fixedly connected to the rotating shaft.

[0017] Preferably, the stirring rod is provided with a sponge sleeve to reduce the wear caused by stirring the fertilizer.

[0018] Preferably, the pushing assembly includes a pushing plate placed on the bottom of the inner wall of the box body, a telescopic rod is fixedly connected between the pushing plate and the inner wall of the box body, a contraction spring is sleeved on the telescopic rod, two ends of the contraction spring are respectively connected to the inner wall of the box body and the pushing plate, the top of the pushing plate is hinged with a connecting rod, and the top of the connecting rod is hinged to the bottom of the large particle screening frame.

[0019] Preferably, an anti-overflow cover is fixedly connected to the top of the large particle screening frame, sliding rods are fixedly connected to the left and right sides of the large particle screening frame, a sliding groove for the sliding rods to slide is provided on the inner wall of the box body, a discharge port is provided on the front side of the large particle screening frame, a transparent cover is provided on the discharge port, a material taking port is provided at the opposite side of the box body and the transparent cover, and an elastic retractable cloth is fixedly connected between the push plate and the large particle screening frame.

[0020] Preferably, reinforcing ribs are fixedly connected between the small particle screening tube and the box body, a material baffle plate is fixedly connected to the inner wall of the small particle screening tube near one end of the box body, and slots are opened on the small particle screening tube and the material receiving cover near the bottom outlet, and a partition is provided in the slot.

[0021] Preferably, a cross bar is fixedly connected to the push plate, a transmission rod is hinged at the end of the cross bar, an anti-blocking rod is hinged at the end of the transmission rod, and a guide ring for the anti-blocking rod to pass through is fixedly connected to the inner wall of the small particle screening tube.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. Through the arrangement of the piston plate, screw, forward and reverse motor, internal threaded barrel, connecting rope outlet pipe, air inlet check valve, air outlet check valve and activated carbon filter, when the piston plate moves downward, under the action of the connecting rope, the large particle screening frame is pulled upward to perform the initial screening of the fertilizer. The downward movement of the piston plate will extract the dust and other gaseous impurities generated in the screening process. The extracted dust and other gaseous impurities are discharged to the outside after filtering, thus avoiding the direct discharge of dust to the outside and causing pollution to the environment.

[0024] Second, through the arrangement of the toothed plate, gears, rotating shaft and stirring rod, when the connecting rope pulls the large-particle screening frame upward, the toothed plate and gears can drive the rotating shaft to rotate, thereby driving the stirring rod to stir and break up the fertilizer in the large-particle screening frame, thereby improving the fluidity of the fertilizer in the large-particle screening frame and achieving better screening effects; and through the arrangement of the sponge sleeve, the stirring rod reduces the stirring wear on the fertilizer when stirring and breaking up the fertilizer, thereby reducing the possibility of crushing the fertilizer particles.

[0025] 3. Through the setting of the push plate, telescopic rod, connecting rod, elastic telescopic cloth and contraction spring, when the large particle screening frame moves up to screen the fertilizer, under the transmission action of the connecting rod, the fertilizer that has been screened by the large particle screening frame is pushed through the discharge port and enters the small particle screening tube for re-screening.

[0026] Fourth, by setting the baffle plate, the fertilizer entering the small particle screening tube can be spread on the inner wall of the small particle screening tube, and the fertilizer is screened again when it flows downward, avoiding too much fertilizer entering at one time and failing to contact the inner wall of the small particle screening tube, resulting in poor screening effect. By setting the cross bar, transmission rod, anti-blocking rod and guide ring, the push plate can push the anti-blocking rod to penetrate between the baffle plate and the inner wall of the small particle screening tube during the pushing process, avoiding the fertilizer from being blocked at the baffle plate. In summary, through the cooperation of relevant structures, fertilizers with larger and smaller particles can be screened out, which is convenient for obtaining fertilizers with particle sizes within a certain range, and is convenient for optimizing the utilization of fertilizers with different particle size ranges in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 It is a front cross-sectional view of the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of the large particle screening frame and the material pushing assembly of the present invention;

[0030] Figure 4 For the present invention Figure 3 Schematic diagram of the structure from an upward perspective;

[0031] Figure 5 It is a schematic diagram of the structure of the large particle screening frame and the disturbance component of the present invention;

[0032] Figure 6 It is a structural schematic diagram of a small particle screening tube of the present invention;

[0033] Figure 7 for Figure 2 A magnified view of the structure at center A;

[0034] Figure 8 for Figure 2 A magnified view of the structure at B in the middle.

[0035] In the figure: 1. box body; 2. large particle screening frame; 3. fixed frame; 4. connecting pipe; 5. connecting rope; 6. tooth plate; 7. small particle screening pipe; 8. material receiving cover; 9. piston plate; 10. forward and reverse motor; 11. screw; 12. internal threaded cylinder; 13. air outlet pipe; 14. activated carbon filter; 15. air outlet check valve; 16. air inlet check valve; 17. guide rope wheel; 18. rotating shaft; 19. gear; 20. stirring rod; 21. sponge cover; 22. push plate; 23. telescopic rod; 24. contraction spring; 25. connecting rod; 26. anti-overflow cover; 27. slide rod; 28. transparent cover; 29. ​​elastic telescopic cloth; 30. reinforcing rib; 31. material blocking plate; 32. partition; 33. cross bar; 34. transmission rod; 35. anti-blocking rod; 36. guide ring. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0037] See also Figures 1 to 8 The present invention provides a technical solution: a screening device for fertilizer processing, comprising a box body 1, and supporting legs fixedly connected to the box body 1, and further comprising:

[0038] A large particle screening frame 2, wherein a sieve hole is provided at the bottom of the large particle screening frame 2, and the large particle screening frame 2 is slidably arranged in the box body 1, and the large particle screening frame 2 is used to screen out fertilizers with large particles or agglomerated particles;

[0039] A fixing frame 3, the fixing frame 3 is fixedly connected to the side of the box body 1, a connecting pipe 4 is fixedly connected between the fixing frame 3 and the box body 1, a feeding pipe is embedded in the connecting pipe 4, and a sealing plug is provided on the feeding pipe;

[0040] A gas extraction component is arranged in the fixed frame 3 and is used to extract gas impurities such as dust generated during the fertilizer screening process;

[0041] A connecting rope 5 is arranged in the connecting pipe 4, one end of the connecting rope 5 is fixedly connected to the large particle screening frame 2, and the other end of the connecting rope 5 is fixedly connected to the gas extraction assembly. When the gas extraction assembly moves downward and upward to complete one gas extraction and discharge, the large particle screening frame 2 is driven up and down by the action of the connecting rope 5 to screen the fertilizer;

[0042] The disturbance component is rotatably arranged in the large particle screening frame 2. The top of the inner wall of the box body 1 is fixedly connected with two tooth plates 6 that mesh with the disturbance component. When the connecting rope 5 pulls the large particle screening frame 2 up and down, the disturbance component is driven to rotate under the cooperation of the tooth plates 6 to achieve stirring of the fertilizer;

[0043] The discharge port is provided on the side of the box body 1 near the bottom thereof, a small particle screening tube 7 is fixedly connected to the discharge port, a sieve hole is provided at the bottom of the small particle screening tube 7, and a material receiving cover 8 is fixedly connected to the bottom of the small particle screening tube 7;

[0044] The pushing assembly is arranged on the bottom of the inner wall of the box body 1, and is used to push the fertilizer that has been screened by the large particle screening frame 2 to pass through the discharge port and enter the small particle screening pipe 7 for re-screening.

[0045] The gas extraction assembly includes a piston plate 9 slidably connected to the fixed frame 3, a forward and reverse motor 10 is fixedly connected to the bottom of the fixed frame 3, the output end of the forward and reverse motor 10 passes through the fixed frame 3 and is fixedly connected to a screw rod 11, and an internal threaded tube 12 connected to the piston plate 9 is threadedly connected to the screw rod 11.

[0046] The forward rotation of the output end of the forward and reverse motor 10 drives the screw 11 to rotate. Since the screw 11 is threadedly connected to the internal threaded barrel 12, and the piston plate 9 restricts the rotation of the internal threaded barrel 12, the internal threaded barrel 12 can drive the piston plate 9 to move downward. The downward movement of the piston plate 9 will extract gas impurities such as dust generated during the screening process into the fixed frame 3.

[0047] An air outlet pipe 13 is embedded in the fixed frame 3, and an activated carbon filter 14 and an air outlet check valve 15 are fixedly connected inside the air outlet pipe 13. When the forward and reverse motor 10 rotates in the opposite direction, the internal threaded tube 12 pushes the piston plate 9 to move upward. With the cooperation of the air inlet check valve 16 and the air outlet check valve 15, the gas containing dust can be discharged after filtering, thereby avoiding the direct discharge of dust to the outside and polluting the environment.

[0048] The inner wall of the vertical pipe on the connecting pipe 4 is provided with a channel for the connecting rope 5 to pass through, and a sponge is provided in the channel. The setting of the channel facilitates the connecting rope 5 to pass through the channel and enter the fixed frame 3, and facilitates the installation of the air intake check valve 16 into the connecting pipe 4. The sponge prevents the gas from entering the connecting pipe 4 from the channel when the piston plate 9 moves up to discharge the gas in the fixed frame 3. The end of the connecting pipe 4 is fixedly connected to the air intake check valve 16, and two guide rope wheels 17 for changing the direction of the connecting rope 5 are fixedly connected in the connecting pipe 4.

[0049] The disturbance assembly includes a rotating shaft 18 rotatably connected to the large particle screening frame 2 , a gear 19 meshing with the tooth plate 6 is fixedly sleeved at the end of the rotating shaft 18 , and a plurality of stirring rods 20 are fixedly connected to the rotating shaft 18 .

[0050] The downward movement of the piston plate 9 will extract the dust and other gas impurities generated in the screening process into the fixed frame 3. At the same time, under the action of the connecting rope 5, the large particle screening frame 2 is pulled upward to perform the initial screening of the fertilizer. The connecting rope 5 pulls the large particle screening frame 2 upward, and with the cooperation of the tooth plate 6 and the gear 19, the rotating shaft 18 can be driven to rotate, thereby driving the stirring rod 20 to stir and break up the fertilizer in the large particle screening frame 2, thereby improving the fluidity of the fertilizer in the large particle screening frame 2 and making the screening effect better.

[0051] The stirring rod 20 is provided with a sponge sleeve 21 for reducing the wear of the fertilizer during stirring.

[0052] By providing the sponge sleeve 21, when the stirring rod 20 is stirring and breaking up the fertilizer, the stirring wear of the fertilizer by the stirring rod 20 is reduced, and the possibility of crushing and breaking the fertilizer particles is reduced.

[0053] The pushing assembly includes a pushing plate 22 placed on the bottom of the inner wall of the box body 1, a telescopic rod 23 is fixedly connected between the pushing plate 22 and the inner wall of the box body 1, a contraction spring 24 is sleeved on the telescopic rod 23, and the two ends of the contraction spring 24 are respectively connected to the inner wall of the box body 1 and the pushing plate 22, and a connecting rod 25 is hinged at the top of the pushing plate 22, and the top end of the connecting rod 25 is hinged to the bottom of the large particle screening frame 2.

[0054] When the large particle screening frame 2 moves up to screen the fertilizer, under the transmission action of the connecting rod 25, the fertilizer that has been screened by the large particle screening frame 2 is pushed through the discharge port and enters the small particle screening tube 7 for re-screening, which can screen out fertilizers with larger and smaller particles, making it easier to obtain fertilizers with particle sizes within a certain range, and facilitating the optimal utilization of fertilizers with different particle size ranges in the later stage.

[0055] The top of the large particle screening frame 2 is fixedly connected with an anti-overflow cover 26, and the left and right sides of the large particle screening frame 2 are fixedly connected with sliding rods 27. The inner wall of the box body 1 is provided with a slide groove for the sliding rod 27 to slide. The sliding rod 27 and the slide groove limit the movement trajectory of the large particle screening frame 2, so that the large particle screening frame 2 moves more smoothly. A discharge port is provided on the front side of the large particle screening frame 2, and a transparent cover 28 is provided on the discharge port. The transparent cover 28 can be fixed to the large particle screening frame 2 by a lock body, bolts, etc., so that the transparent cover 28 can be opened to take out the large particles or agglomerated fertilizers screened out in the large particle screening frame 2. A material taking port is provided at the opposite side of the box body 1 and the transparent cover 28, and an elastic retractable cloth 29 is fixedly connected between the pushing plate 22 and the large particle screening frame 2. The elastic retractable cloth 29 blocks the fertilizer falling from the large particle screening frame 2 when the pushing plate 22 pushes the fertilizer toward the discharge port, so that it always falls on one side of the pushing plate 22.

[0056] A reinforcing rib 30 is fixedly connected between the small particle screening pipe 7 and the box body 1, a material blocking plate 31 is fixedly connected to the inner wall of the small particle screening pipe 7 near one end of the box body 1, and a slot is opened on the small particle screening pipe 7 and the material receiving cover 8 near the bottom outlet, and a partition plate 32 is provided in the slot.

[0057] By setting the baffle plate 31, the fertilizer entering the small particle screening tube 7 can be spread on the inner wall of the small particle screening tube 7, and the fertilizer is screened again when it flows downward, avoiding too much fertilizer entering at one time and failing to contact the inner wall of the small particle screening tube 7, resulting in poor screening effect.

[0058] The push plate 22 is fixedly connected to a cross bar 33 , a transmission rod 34 is hinged at the end of the cross bar 33 , an anti-blocking rod 35 is hinged at the end of the transmission rod 34 , and a guide ring 36 for the anti-blocking rod 35 to pass through is fixedly connected to the inner wall of the small particle screening tube 7 .

[0059] During the pushing process, the pushing plate 22 can push the anti-blocking rod 35 to penetrate between the baffle plate 31 and the inner wall of the small particle screening tube 7, thereby preventing the fertilizer from being blocked at the baffle plate 31. In summary, through the cooperation of relevant structures, fertilizers with larger and smaller particles can be screened out, which is convenient for obtaining fertilizers with particle sizes within a certain range, and is convenient for optimizing the utilization of fertilizers with different particle size ranges in the later stage.

[0060] Working principle: When the screening device for fertilizer processing is in use, when it is necessary to screen the fertilizer, open the sealing plug on the feeding pipe, and then add the fertilizer into the large particle screening frame 2 through the feeding pipe, start the forward and reverse motor 10, and the output end of the forward and reverse motor 10 rotates forward to drive the screw 11 to rotate. Since the screw 11 is threadedly connected with the internal threaded tube 12, and the piston plate 9 restricts the rotation of the internal threaded tube 12, the internal threaded tube 12 can drive the piston plate 9 to move downward. The downward movement of the piston plate 9 will extract the dust and other gas impurities generated in the screening process into the fixed frame 3. At the same time, under the action of the connecting rope 5, the large particle screening frame 2 is pulled up to perform the initial screening of the fertilizer. The connecting rope 5 pulls the large particle screening frame 2 up, and with the cooperation of the tooth plate 6 and the gear 19, the rotating shaft 18 can be driven to rotate, thereby driving the stirring rod 20 to stir and break up the fertilizer in the large particle screening frame 2, thereby improving the fluidity of the fertilizer in the large particle screening frame 2. The screening effect is better. When the large-particle screening frame 2 moves up to screen the fertilizer, under the transmission action of the connecting rod 25, the fertilizer that has been screened and fallen by the large-particle screening frame 2 is pushed through the discharge port and enters the small-particle screening tube 7 for re-screening, which can screen out fertilizers with larger and smaller particles, making it convenient to obtain fertilizers with particle sizes within a certain range, and convenient for optimizing the utilization of fertilizers with different particle size ranges in the later stage; when the forward and reverse motor 10 rotates in the opposite direction, the internal threaded cylinder 12 pushes the piston plate 9 to move up, and with the cooperation of the air inlet check valve 16 and the air outlet check valve 15, the gas containing dust can be discharged after filtering, avoiding the direct discharge of dust to the outside world and polluting the environment. At the same time, the large-particle screening frame 2 can be pulled down by its own gravity and the elastic force of the contraction spring 24 to pull the push plate 22 back, and the rotating shaft 18 drives the stirring rod 20 to rotate in the opposite direction to screen the fertilizer in the large-particle screening frame 2.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A screening device for fertilizer processing, comprising a box (1) and supporting legs fixedly connected to the box (1), characterized in that: Also includes: A large particle screening frame (2), the large particle screening frame (2) being slidably arranged in the box body (1), and the large particle screening frame (2) being used to screen out fertilizers with large particles or agglomerated particles; A fixed frame (3), the fixed frame (3) being fixedly connected to the side of the box body (1), a connecting pipe (4) being fixedly connected between the fixed frame (3) and the box body (1), and a feeding pipe being embedded and connected to the connecting pipe (4); A gas extraction component, which is arranged in the fixed frame (3) and is used to extract gas impurities such as dust generated during the fertilizer screening process; A connecting rope (5), wherein the connecting rope (5) is arranged in the connecting pipe (4), one end of the connecting rope (5) is fixedly connected to the large particle screening frame (2), and the other end of the connecting rope (5) is fixedly connected to the gas extraction component. When the gas extraction component moves downward and upward to complete one gas extraction and discharge, the large particle screening frame (2) is driven to move up and down once to screen the fertilizer under the action of the connecting rope (5); A disturbance component, the disturbance component is rotatably arranged in the large particle screening frame (2), and the top of the inner wall of the box body (1) is fixedly connected with two tooth plates (6) that mesh with the disturbance component. When the connecting rope (5) pulls the large particle screening frame (2) to move up and down, the disturbance component is driven to rotate with the cooperation of the tooth plates (6) to achieve stirring of the fertilizer; A discharge port, the discharge port being opened on a side surface of the box body (1) near the bottom thereof, the discharge port being fixedly connected to a small particle screening pipe (7), and the bottom of the small particle screening pipe (7) being fixedly connected to a material receiving cover (8); A material pushing assembly, the material pushing assembly being arranged on the bottom of the inner wall of the box body (1), the material pushing assembly being used to push the fertilizer that has been screened by the large particle screening frame (2) to pass through the material outlet and enter the small particle screening pipe (7) for re-screening; The gas extraction assembly comprises a piston plate (9) slidably connected in a fixed frame (3); a forward and reverse motor (10) is fixedly connected to the bottom of the fixed frame (3); an output end of the forward and reverse motor (10) penetrates into the fixed frame (3) and is fixedly connected to a screw rod (11); an internal threaded barrel (12) connected to the piston plate (9) is threadedly connected to the screw rod (11); An air outlet pipe (13) is embedded and connected to the fixed frame (3), and an activated carbon filter (14) and an air outlet one-way valve (15) are fixedly connected inside the air outlet pipe (13); The inner wall of the upper vertical pipe of the connecting pipe (4) is provided with a channel for the connecting rope (5) to pass through, and a sponge is provided in the channel. An air intake check valve (16) is fixedly connected to the end of the connecting pipe (4), and two guide rope wheels (17) for changing the direction of the connecting rope (5) are fixedly connected in the connecting pipe (4); The disturbance component comprises a rotating shaft (18) rotatably connected to the large particle screening frame (2), the end of the rotating shaft (18) is fixedly sleeved with a gear (19) meshing with the tooth plate (6), and a plurality of stirring rods (20) are fixedly connected to the rotating shaft (18); The pusher assembly comprises a pusher plate (22) placed on the bottom of the inner wall of the box body (1), a telescopic rod (23) is fixedly connected between the pusher plate (22) and the inner wall of the box body (1), a contraction spring (24) is sleeved on the telescopic rod (23), the two ends of the contraction spring (24) are respectively connected to the inner wall of the box body (1) and the pusher plate (22), the top of the pusher plate (22) is hinged with a connecting rod (25), and the top end of the connecting rod (25) is hinged to the bottom of the large particle screening frame (2); A reinforcing rib (30) is fixedly connected between the small particle screening pipe (7) and the box body (1); a material blocking plate (31) is fixedly connected to the inner wall of the small particle screening pipe (7) at one end close to the box body (1); a notch is provided on the small particle screening pipe (7) and the material receiving cover (8) near the bottom outlet, and a partition plate (32) is provided in the notch; A cross bar (33) is fixedly connected to the push plate (22), a transmission rod (34) is hingedly connected to the end of the cross bar (33), an anti-blocking rod (35) is hingedly connected to the end of the transmission rod (34), and a guide ring (36) for the anti-blocking rod (35) to pass through is fixedly connected to the inner wall of the small particle screening tube (7).

2. A screening device for fertilizer processing according to claim 1, characterized in that: The stirring rod (20) is sleeved with a sponge sleeve (21) for reducing abrasion caused by stirring the fertilizer.

3. A screening device for fertilizer processing according to claim 1, characterized in that: The top of the large particle screening frame (2) is fixedly connected to an anti-overflow cover (26), the left and right sides of the large particle screening frame (2) are fixedly connected to sliding rods (27), the inner wall of the box body (1) is provided with a slide groove for the sliding rod (27) to slide, the front side of the large particle screening frame (2) is provided with a discharge port, the discharge port is provided with a transparent cover (28), the box body (1) and the transparent cover (28) are opposite to each other. An elastic retractable cloth (29) is fixedly connected between the push plate (22) and the large particle screening frame (2).

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