A fertilizer granule screening device and its usage method

Abstract

This invention provides a fertilizer granule screening device and its usage method, relating to the field of fertilizer screening technology. The device includes: a feeding structure, a conveying structure, and a screening structure. The conveying structure includes a first guide plate, a conveyor belt assembly, and a second guide plate. The screening structure includes a first screen plate and a second screen plate, with a first collection trough and a second collection trough respectively disposed below the first and second screen plates. A third collection trough is disposed on the side of the second collection trough away from the first collection trough. A cover is disposed above the screening structure, and a blower is connected to the second opening of the cover. The first and second collection troughs are connected via a first filter screen. A second filter screen and a third filter screen are respectively disposed on opposite side walls of the first collection trough, and a first exhaust fan and a second exhaust fan are respectively connected to the outer sides of the second and third filter screens. This invention solves the problem in the prior art that screening fertilizer granules not only generates a large amount of dust but also affects production efficiency.

Description

Technical Field

[0001] This invention belongs to the field of fertilizer screening technology, and more specifically, relates to a fertilizer granule screening device and its usage method. Background Technology

[0002] Granular fertilizers are solid fertilizers made according to a predetermined average particle size. Granular fertilizers can reduce the hygroscopicity of fertilizers, reduce environmental pollution, and are also easy to apply. Some water-soluble phosphate fertilizers can have their chemical fixation in the soil reduced after being made into granular fertilizers.

[0003] For granular fertilizers, to ensure uniform particle size and compliance with standards, the fertilizer particles need to be screened to ensure they fall within a set threshold, thus guaranteeing the fertilizer's effectiveness. Traditional fertilizer particle screening often uses vibrating screens, where the vibration of the screen plates separates the fertilizer particles. Small particles or powdery materials are filtered out, leaving only fertilizer particles with a diameter no smaller than the standard material. This is followed by a second vibrating screening to finally separate fertilizer particles that meet the standard material diameter. However, this screening method generates a large amount of dust due to the vibration of the screen plates and the collisions and friction between materials, affecting the diameter of the fertilizer particles and causing them to shrink. Therefore, the dust control process is stressful and production efficiency is relatively low during granular fertilizer production. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a fertilizer granule screening device and its usage method, thereby solving the problem that the existing technology of using vibrating screens to screen fertilizer granules not only generates a large amount of dust but also affects production efficiency.

[0005] To achieve the above objectives, the present invention provides a fertilizer granule screening device, comprising:

[0006] The feeding structure, conveying structure, and screening structure are arranged sequentially.

[0007] The feeding structure includes a feeding hopper, with an inlet and an outlet respectively provided at the upper and lower ends of the feeding hopper;

[0008] The material conveying structure includes a first guide plate, a conveyor belt assembly, and a second guide plate arranged in sequence. The first guide plate is connected to the discharge port and is used to guide the material flowing out of the discharge port. Both the first guide plate and the second guide plate are arc-shaped.

[0009] The screening structure includes a first screen plate and a second screen plate arranged in sequence. The first screen plate and the second screen plate are respectively provided with a first screen hole and a second screen hole. The diameter of the second screen hole is matched with the diameter of the standard material so that the standard material can pass through the second screen hole. The diameter of the first screen hole is smaller than the diameter of the standard material so that the standard material cannot pass through the first screen hole. A first collection trough and a second collection trough are respectively provided below the first screen plate and the second screen plate. A third collection trough is provided on the side of the second collection trough away from the first collection trough.

[0010] A cover is provided above the screening structure. A first opening is provided at one end of the cover near the second guide plate and is connected to the second guide plate through the first opening. A second opening is provided above the first opening and a blower is connected to the second opening.

[0011] The first collection tank and the second collection tank are connected through a third opening. A first filter screen is provided in the third opening. A fourth opening and a fifth opening are respectively provided on the opposite side walls of the first collection tank. A second filter screen and a third filter screen are respectively provided in the fourth opening and the fifth opening. A first exhaust fan and a second exhaust fan are respectively connected to the outside of the fourth opening and the fifth opening.

[0012] Optionally, the upper end of the feed hopper is configured as a funnel-shaped structure to form the feed inlet. The lower end of the feed hopper has two opposite first arc-shaped portions, and an elongated discharge outlet is formed between the lower ends of the two first arc-shaped portions. The interior of the feed hopper has two opposite second arc-shaped portions, which are connected to the first arc-shaped portions and are on the same circumference. A distribution port is formed between the upper ends of the two second arc-shaped portions. A distribution shaft is rotatably arranged at the center of the interior of the second arc-shaped portions and the first arc-shaped portions. At least three distribution blades are evenly distributed around the outer circumference of the distribution shaft. The outer ends of the powder blades cooperate with the first arc-shaped portions and the second arc-shaped portions, enabling the material to enter in batches between two adjacent distribution blades through the distribution port and flow out from the discharge outlet.

[0013] Optionally, the conveyor belt assembly includes a drive component and a conveyor belt. The drive component drives the conveyor belt to move cyclically. Baffles are provided on both sides of the conveyor belt, and a conveying space is formed between the two baffles. Two crossbeams are arranged at intervals along the conveying direction of the conveyor belt in the conveying space. The crossbeams are connected to the baffles. Multiple pull ropes are arranged at intervals between the two crossbeams, and the multiple pull ropes divide the conveying space into multiple conveying channels.

[0014] Optionally, the interior of the cover is provided with two first linear modules. The lower side of the slider of each of the two first linear modules is connected to a first telescopic component. The telescopic ends of the two first telescopic components are rotatably connected to a rotating roller. The outer surface of the rotating roller is provided with bristles. At least one end of the rotating roller is provided with a rotation drive component, which is used to drive the rotating roller to rotate.

[0015] Optionally, the system also includes a screen plate anti-clogging structure, which comprises two second linear modules, two first rotating wheels, and two second rotating wheels. The two second linear modules are respectively disposed on both sides of the second screen plate. The slider of each second linear module is connected to one first rotating wheel and one second rotating wheel. The two first rotating wheels are respectively disposed on the upper sides of the second screen plate and the two second rotating wheels are respectively disposed on the lower sides of the second screen plate. Each first rotating wheel cooperates with one second rotating wheel and the two are staggered, enabling them to move towards each other and compress the second screen plate, thereby causing the second screen plate to deform.

[0016] Optionally, the upper and lower sides of the slider of the second linear module are respectively connected to a first connecting frame and a second connecting frame. The first connecting frame and the second connecting frame are respectively connected to a second telescopic component and a third telescopic component on their close sides. The telescopic ends of the second telescopic component and the third telescopic component are respectively connected to a first bearing seat and a second bearing seat. The first bearing seat and the second bearing seat are respectively provided with a first bearing and a second bearing. The first bearing and the second bearing are rotatably connected to the first rotating wheel and the second rotating wheel through a first shaft and a second shaft, respectively.

[0017] Optionally, the lower ends of the first collection tank, the second collection tank, and the third collection tank are respectively provided with a first outlet, a second outlet, and a third outlet. The first outlet and the third outlet are used to connect to the auger conveyor assembly, which is used to connect to the fertilizer production equipment.

[0018] Optionally, the second collection trough includes an arc-shaped wall and a flexible wall arranged sequentially from top to bottom. The arc-shaped wall is an inwardly contracting arc shape, and the flexible wall is made of rubber and has an inwardly contracting structure. The second outlet is formed at the lower end of the flexible wall.

[0019] Optionally, it also includes a housing connected to the feeding structure, the housing covering the outside of the conveying structure and the screening structure, and a dust removal fan connected to one side of the housing.

[0020] The present invention also provides a method of using a fertilizer granule screening device, the fertilizer granule screening device described above comprising:

[0021] Input the material to be screened into the feeding structure;

[0022] The material is fed into the screening structure through the conveying structure;

[0023] Turn on the hair dryer and the first exhaust fan;

[0024] Under the action of the blower and the exhaust fan, the material passes through the first opening of the cover and then passes through the first screen plate and the second screen plate in sequence. The material with a diameter smaller than the standard material diameter falls into the first collection tank through the first screen hole, the material with the standard material diameter falls into the second collection tank through the second screen hole, and the material with a diameter larger than the standard material diameter falls into the third collection tank after passing through the second screen plate, while the dust enters the first collection tank.

[0025] After a set time period, the first exhaust fan is turned off and the second exhaust fan is turned on. After another set time period, the second exhaust fan is turned off and the first exhaust fan is turned on. This process of alternating between turning on the first and second exhaust fans is repeated until the fertilizer granules are screened.

[0026] This invention provides a fertilizer granule screening device and its usage method. The beneficial effects are as follows: The fertilizer granule screening device has a feeding structure, a conveying structure, and a screening structure arranged sequentially from upstream to downstream. The feeding structure inputs the material to be screened. The conveying structure utilizes a first guide plate, a conveyor belt assembly, and a second guide plate to sequentially convey the material. The first and second guide plates are arc-shaped, allowing the material to flow in a sliding manner during transmission. Simultaneously, the conveyor belt assembly is not rigid, reducing the impact and collision during feeding and minimizing friction and impact on the material. After entering the screening structure, the material passes through the first and second screen plates sequentially. Material with a diameter smaller than the standard material diameter falls through the first screen hole into the first collection trough, material with the standard material diameter falls through the second screen hole into the second collection trough, and material with a diameter larger than the standard material diameter falls into the third collection trough after passing through the second screen plate, achieving a continuous flow screening of the material. During this process, the first and second screen plates do not vibrate; instead, the action of a blower and either the first or second exhaust fan on the screen plates... A pressure difference is created between the upper and lower sides of the second sieve plate, ensuring screening efficiency and reducing clogging rate. Simultaneously, under the pressure difference, dust is effectively drawn into the first collection tank. Dust in the second collection tank and on the second sieve plate can also pass through the first filter screen into the first collection tank. Due to the presence of the second and third filters, dust is trapped in the first collection tank and discharged along with smaller diameter materials. Furthermore, the second and third filters are positioned opposite each other, ensuring efficient screening when the blower and first exhaust fan are on while the second exhaust fan is off. Gas pressure causes the second filter to bulge outwards, while the third filter bulges inwards. At this time, some dust will be adsorbed on the second filter. After a set time, the first exhaust fan is turned off and the second exhaust fan is turned on. This time, the gas pressure causes the second filter to bulge inwards and the third filter to bulge outwards. The dust adsorbed on the second filter will fall into the first collection tank, preventing the filter from being clogged by dust and improving the dust collection effect. By repeatedly turning the first and second exhaust fans on and off in this way, efficient dust collection can be achieved, preventing dust from overflowing and causing pollution.

[0027] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0028] The above and other objects, features and advantages of the present invention will become more apparent from the more detailed description of exemplary embodiments of the invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the invention.

[0029] Figure 1A schematic diagram of the overall structure of a fertilizer granule screening device according to an embodiment of the present invention is shown.

[0030] Figure 2 A schematic diagram of the feeding structure of a fertilizer granule screening device according to an embodiment of the present invention is shown.

[0031] Figure 3 A top view of the conveyor belt of a fertilizer granule screening device according to an embodiment of the present invention is shown.

[0032] Figure 4 A partially enlarged structural schematic diagram of point A of a fertilizer granule screening device according to an embodiment of the present invention is shown.

[0033] Figure 5 A schematic diagram of an anti-clogging structure for a sieve plate in a fertilizer granule screening device according to an embodiment of the present invention is shown.

[0034] Figure 6 A schematic diagram illustrating the working principle of the anti-clogging structure of the sieve plate of a fertilizer granule screening device according to an embodiment of the present invention is shown.

[0035] Figure 7 A schematic diagram of the structure of the second collection tank of a fertilizer granule screening device according to an embodiment of the present invention is shown.

[0036] Figure 8 A flowchart illustrating a method of using a fertilizer granule screening device according to an embodiment of the present invention is shown.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Feeding structure; 2. Conveying structure; 3. Screening structure; 4. First guide plate; 5. Conveyor belt assembly; 6. Second guide plate; 7. First screen plate; 8. Second screen plate; 9. First collection trough; 10. Second collection trough; 11. Third collection trough; 12. Cover; 13. Blower; 14. First filter screen; 15. Second filter screen; 16. Third filter screen; 17. First exhaust fan; 18. Second exhaust fan; 19. First arc section; 20. Second arc section; 21. Distributor port; 22. Distributor shaft; 23. Distributor blades; 24. Baffle; 25. Crossbeam; 26. 27. Pull rope; 28. First linear module; 29. ​​First telescopic component; 30. Rotating roller; 31. Brush bristles; 32. Screen plate anti-clogging structure; 33. Second linear module; 34. First rotating wheel; 35. Second rotating wheel; 36. First connecting frame; 37. Second connecting frame; 38. Second telescopic component; 39. First bearing seat; 40. Second bearing seat; 41. First shaft; 42. Second shaft; 43. First outlet; 44. Second outlet; 45. Third outlet; 46. Arc-shaped wall; 47. Flexible wall; 48. Outer shell; 49. Dust removal fan. Detailed Implementation

[0039] Preferred embodiments of the invention will now be described in more detail. While preferred embodiments of the invention are described below, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0040] like Figure 1 The present invention provides a fertilizer granule screening device, comprising:

[0041] The feeding structure 1, the conveying structure 2, and the screening structure 3 are arranged sequentially.

[0042] The feeding structure 1 includes a feeding hopper, with a feeding port and a discharging port respectively provided at the upper and lower ends of the feeding hopper;

[0043] The material conveying structure 2 includes a first guide plate 4, a conveyor belt assembly 5, and a second guide plate 6 arranged in sequence. The first guide plate 4 is connected to the discharge port and is used to guide the material flowing out of the discharge port. Both the first guide plate 4 and the second guide plate 6 are arc-shaped.

[0044] The screening structure 3 includes a first screen plate 7 and a second screen plate 8 arranged in sequence. The first screen plate 7 and the second screen plate 8 are respectively provided with a first screen hole and a second screen hole. The diameter of the second screen hole is matched with the diameter of the standard material so that the standard material can pass through the second screen hole. The diameter of the first screen hole is smaller than the diameter of the standard material so that the standard material cannot pass through the first screen hole. A first collection trough 9 and a second collection trough 10 are respectively provided below the first screen plate 7 and the second screen plate 8. A third collection trough 11 is provided on the side of the second collection trough 10 away from the first collection trough 9.

[0045] A cover 12 is provided above the screening structure 3. A first opening is provided at one end of the cover 12 near the second guide plate 6 and is connected to the second guide plate 6 through the first opening. A second opening is provided above the first opening and a blower 13 is connected to the second opening.

[0046] The first collection tank 9 and the second collection tank 10 are connected through a third opening. A first filter screen 14 is installed in the third opening. A fourth opening and a fifth opening are respectively opened on the opposite side walls of the first collection tank 9. A second filter screen 15 and a third filter screen 16 are respectively installed in the fourth opening and the fifth opening. A first exhaust fan 17 and a second exhaust fan 18 are respectively connected to the outside of the fourth opening and the fifth opening.

[0047] Specifically, to address the problems of existing technologies using vibrating screens to screen fertilizer granules, which not only generate large amounts of dust, causing pollution, but also affect the diameter of the material, resulting in a low yield and impacting production efficiency, the fertilizer granule screening device provided by this invention has a feeding structure 1, a conveying structure 2, and a screening structure 3 arranged sequentially from upstream to downstream. The feeding structure 1 inputs the material to be screened. The conveying structure 2 utilizes a first guide plate 4, a conveyor belt assembly 5, and a second guide plate 6 to sequentially convey the material. The first guide plate 4 and the second guide plate 6 are arc-shaped, allowing the material to flow in a sliding manner during transmission. Simultaneously, the conveyor belt... The conveyor belt of component 5 is not rigid. This material conveying structure 2 can reduce the impact and collision generated during the feeding process, and reduce the degree of friction and impact on the material. After the material enters the screening structure 3, it passes through the first screen plate 7 and the second screen plate 8 in sequence. The material with a diameter smaller than the standard material diameter falls into the first collection tank 9 through the first screen hole, the material with the standard material diameter falls into the second collection tank 10 through the second screen hole, and the material with a diameter larger than the standard material diameter falls into the third collection tank 11 after passing through the second screen plate 8. This realizes the continuous screening of the material. During this process, the first screen plate 7 and the second screen plate 8 do not vibrate, but are controlled by the blower 13 and the first exhaust fan 17 or the blower 13 and the exhaust fan 17. The second exhaust fan 18 creates a pressure difference between the upper and lower sides of the first screen plate 7 and the second screen plate 8, ensuring screening efficiency and reducing screen plate clogging rate. Simultaneously, under the pressure difference, dust is effectively drawn into the first collection tank 9. Dust in the second collection tank 10 and on the second screen plate 8 can also enter the first collection tank 9 through the first filter screen 14. Due to the presence of the second filter screen 15 and the third filter screen 16, dust is trapped in the first collection tank 9 and can be discharged along with small-diameter materials. Furthermore, the second filter screen 15 and the third filter screen 16 are arranged opposite each other, and when the blower 13 and the first exhaust fan 17 are turned on, the second... When the exhaust fan 18 is turned off, the gas pressure causes the second filter screen 15 to bulge outwards and the third filter screen 16 to bulge inwards. At this time, some dust will be adsorbed on the second filter screen 15. After a set time, the first exhaust fan 17 is turned off and the second exhaust fan 18 is turned on. This time, the gas pressure causes the second filter screen 15 to bulge inwards and the third filter screen 16 to bulge outwards. At this time, the dust adsorbed on the second filter screen 15 will fall into the first collection tank 9, preventing the filter screen from being blocked by dust and improving the dust collection effect. By repeatedly turning the first exhaust fan 17 and the second exhaust fan 18 on and off, efficient dust collection can be achieved, preventing dust from overflowing and causing pollution.

[0048] Furthermore, the standard material diameter is a threshold. Materials with a diameter smaller than the standard material diameter are those whose diameter is less than the lower limit of this threshold, while materials with a diameter larger than the standard material diameter are those whose diameter is greater than the upper limit of this threshold.

[0049] In this embodiment, as Figure 1 One end of the first guide plate 4 is connected to one side wall of the discharge port. The material flowing out of the discharge port enters the first guide plate 4 and is flexibly guided by the first guide plate 4. The other end of the first guide plate 4 is above one end of the conveyor belt assembly 5 to achieve smooth material guidance. One end of the second guide plate 6 is below the other end of the conveyor belt assembly 5. The material conveyed by the conveyor belt assembly 5 can fall smoothly into the second guide plate 6 and be flexibly guided by the second guide plate 6. The other end of the second guide plate 6 is above one end of the first screen plate 7 to also achieve smooth material guidance.

[0050] In this embodiment, the first screen plate 7 and the second screen plate 8 are steel screen plates, the cover 12 is a box-shaped steel cover 12, the first filter screen 14 can intercept the material in the second collection tank 10 and allow dust to pass through smoothly, the second filter screen 15 and the third filter screen 16 can intercept dust and allow airflow to pass through, and can be dustproof cloth or filter cloth.

[0051] Optionally, the upper end of the feed hopper is configured as a funnel-shaped structure to form a feed inlet. The lower end of the feed hopper is provided with two first arc-shaped portions 19 facing each other, and a long strip-shaped discharge outlet is formed between the lower ends of the two first arc-shaped portions 19. The inside of the feed hopper is provided with two second arc-shaped portions 20 facing each other. The second arc-shaped portions 20 are connected to the first arc-shaped portions 19 and are on the same circumference. A distribution port 21 is formed between the upper ends of the two second arc-shaped portions 20. A distribution shaft 22 is rotatably provided at the center position of the inner part of the second arc-shaped portions 20 and the first arc-shaped portions 19. At least three distribution blades 23 are evenly distributed around the outer periphery of the distribution shaft 22. The outer ends of the powder blades cooperate with the first arc-shaped portions 19 and the second arc-shaped portions 20, so that the material can enter the space between two adjacent distribution blades 23 in batches through the distribution port 21 and flow out from the discharge outlet.

[0052] Specifically, such as Figure 2As shown, the flared inlet facilitates material input. The first arc portion 19 and the second arc portion 20 are connected to form a cylindrical structure with a material distribution port 21 at the upper end and a material outlet at the lower end. The material distribution shaft 22 is rotatably located at the center of the cylindrical structure. One end of the material distribution shaft 22 is connected to a drive motor, which drives it to rotate, causing at least three material distribution blades 23 to rotate inside the cylindrical structure. As the material distribution blades 23 rotate, the material enters the space between two adjacent material distribution blades 23 through the material distribution port 21 in sequence. As the material enters, the material in the space between two adjacent material distribution blades 23 at the lower outlet can flow out through the outlet. Compared with direct vertical material drop, this feeding method forms flexible feeding. Furthermore, since the outlet is elongated, the material is distributed for the first time during discharge, tending to be evenly distributed along the width direction of the first guide plate 4. This avoids material accumulation and significant impact collisions during feeding, thereby minimizing the reduction in the diameter of the material.

[0053] In this embodiment, baffles are respectively provided on both sides of the first guide plate 4 and the second guide plate 6.

[0054] Optionally, the conveyor belt assembly 5 includes a drive component and a conveyor belt. The drive component is used to drive the conveyor belt to move in a circular motion. Baffles 24 are provided on both sides of the conveyor belt, and a conveying space is formed between the two baffles 24. Two crossbeams 25 are arranged at intervals along the conveying direction of the conveyor belt in the conveying space. The crossbeams 25 are connected to the baffles 24. Multiple pull ropes 26 are arranged at intervals between the two crossbeams 25, and the multiple pull ropes 26 divide the conveying space into multiple conveying channels.

[0055] Specifically, such as Figure 3 As shown, in order to further distribute the material during the material transfer process, so that the material is as evenly distributed as possible in the width direction of the transfer path and as thin and uniform as possible in terms of thickness, which is beneficial to the screening effect and screening efficiency after the material enters the screening structure 3, multiple pull ropes 26 are set above the conveyor belt. The multiple pull ropes 26 extend along the material transfer direction, are set parallel to each other, and form multiple transfer channels side by side. Moreover, the pull ropes 26 are not rigid, so they provide flexible guidance for the material during the transfer process, making the material as evenly distributed in width and thickness as possible.

[0056] In this embodiment, the pull rope 26 is made of nylon rope.

[0057] Optionally, the cover 12 is provided with two first linear modules 27 inside. The lower side of the slider of each of the two first linear modules 27 is connected to a first telescopic component 28. The telescopic ends of the two first telescopic components 28 are rotatably connected to a rotating roller 29. The outer surface of the rotating roller 29 is provided with bristles 30. At least one end of the rotating roller 29 is provided with a rotation drive component, which is used to drive the rotating roller 29 to rotate.

[0058] Specifically, such as Figure 4 As shown, the first linear module 27 is located below the inner top wall of the cover 12, and its slider can reciprocate along the material movement direction. The first telescopic component 28 is located below the slider of the first linear module 27. The extension and retraction of the first telescopic component 28 drives the rotating roller 29 to rise and fall. In use, the first telescopic component 28 extends, and at the same time, the first linear module 27 drives its slider to move to the left. The rotating roller 29 rotates clockwise under the action of the rotation drive component, and the brush bristles 30 contact the material on the first screen plate 7. Under the action of rotation and movement, the material can be promoted to move from the first screen plate 7 to the second screen plate 8, ensuring the material movement effect and thus ensuring screening efficiency. When the slider of the first linear module 27 moves to the end, the first telescopic component 28 retracts, so that the bristles 30 no longer contact the material, and the slider of the first linear module 27 moves back quickly, and the first telescopic component 28 extends again. This process is repeated, which can not only improve the material conveying effect, but also facilitate the material to pass through the first screen hole and the second screen hole, improve screening efficiency, and reduce screen hole clogging.

[0059] Optionally, it also includes a screen plate anti-clogging structure 31, which includes two second linear modules 32, two first rotating wheels 33, and two second rotating wheels 34. The two second linear modules 32 are respectively disposed on both sides of the second screen plate 8. The slider of each second linear module 32 is connected to one first rotating wheel 33 and one second rotating wheel 34. The two first rotating wheels 33 are respectively disposed on the upper sides of the second screen plate 8 and the two second rotating wheels 34 are respectively disposed on the lower sides of the second screen plate 8. Each first rotating wheel 33 cooperates with one second rotating wheel 34 and the two are staggered, so that they can move towards each other and squeeze the second screen plate 8 to deform the second screen plate 8.

[0060] Specifically, such as Figure 5 As shown, the two second linear modules 32 of the screen plate anti-clogging structure 31 can drive the sliders of the two modules to reciprocate on both sides of the second screen plate 8. Each slider is equipped with a first rotating wheel 33 and a second rotating wheel 34, which are respectively located above and below the second screen plate 8. Through their lifting and lowering, the first rotating wheel 33 can press down on the second screen plate 8, and the second rotating wheel 34 can press up on the second screen plate 8. Due to their staggered arrangement, under the squeezing action of the two, the second screen plate 8 can undergo local deformation, forming a shape like... Figure 6In the state shown, as the two second linear modules 32 drive their sliders to move synchronously, the deformation position of the second screen plate 8 gradually moves, thereby causing the second screen plate 8 to form a wave-like deformation. Under this action, the material particles blocked in the second screen holes can fall smoothly into the second collection tank 10, solving the problem of the second screen hole blockage. Compared with the traditional screen plate vibration method, the present invention uses the local deformation of the second screen plate 8 to deal with the blockage of the second screen holes, which can reduce the impact and friction on the material and reduce the generation of dust.

[0061] Optionally, the upper and lower sides of the slider of the second linear module 32 are respectively connected to a first connecting frame 35 and a second connecting frame 36. The first connecting frame 35 and the second connecting frame 36 are respectively connected to a second telescopic component 37 and a third telescopic component 38 on their close sides. The telescopic ends of the second telescopic component 37 and the third telescopic component 38 are respectively connected to a first shaft 41 bearing 39 and a second shaft 42 bearing 40. The first shaft 41 bearing and the second shaft 42 bearing are respectively provided in the first shaft 41 bearing 39 and the second shaft 42 bearing 40. The first shaft 41 bearing and the second shaft 42 bearing are rotatably connected to the first rotating wheel 33 and the second rotating wheel 34 through the first shaft 41 and the second shaft 42, respectively.

[0062] Specifically, such as Figure 5 As shown, the first connecting frame 35 and the second connecting frame 36 are L-shaped. One end of each is connected to the upper and lower sides of the slider of the second linear module 32, respectively. The other ends of each are connected to a second telescopic component 37 and a third telescopic component 38. The telescopic end of the second telescopic component 37 is rotatably connected to the first rotating wheel 33 through the first shaft 41 bearing 39, the first shaft 41 bearing and the first shaft 41, and can drive the first rotating wheel 33 to rise and fall. Similarly, it can also realize the rotational connection and rise and fall of the second rotating wheel 34. The first rotating wheel 33 and the second rotating wheel 34 are pressed at the edge of the second screen plate 8. When performing anti-blocking operation, it does not affect the normal screening operation.

[0063] Furthermore, such as Figure 6 As shown, the length of the second screen plate 8 can be slightly greater than the length of the second collection trough 10, so that the first rotating roller 33 and the second rotating roller 34 can smoothly cause the deformation of the second screen plate 8 when it deforms; at the same time, in order to improve the material transfer effect, the second screen plate 8 can also be set at an angle.

[0064] In this embodiment, the anti-blocking structure 31 of the sieve plate can be activated periodically and does not need to work continuously; for example, it can be activated once every 1 hour, and each time the second linear module 32 drives its slider to move back and forth twice.

[0065] Optionally, the lower ends of the first collection tank 9, the second collection tank 10 and the third collection tank 11 are respectively provided with a first outlet 43, a second outlet 44 and a third outlet 45, the first outlet 43 and the third outlet 45 are used to connect to the auger conveyor assembly, and the auger conveyor assembly is used to connect to the fertilizer production equipment.

[0066] Specifically, the first outlet 43 and the second outlet 44 can discharge the small granular material collected in the first collection tank 9 and the large granular material collected in the third collection tank 11, respectively. Both of these materials that do not meet the standard material diameter can be transported back to the fertilizer production equipment through the auger conveyor assembly as raw materials for reprocessing, regranulation, etc., and then screened by the fertilizer granule screening device. The second outlet 44 can output materials that meet the standard material diameter, and the output materials can enter the next process, such as bagging or transportation.

[0067] Optionally, the second collection tank 10 includes an arc-shaped wall 46 and a flexible wall 47 arranged sequentially from top to bottom. The arc-shaped wall 46 is an inwardly contracting arc shape, and the flexible wall 47 is made of rubber and has an inwardly contracting structure. A second outlet 44 is formed at the lower end of the flexible wall 47.

[0068] Specifically, such as Figure 7 As shown, the two side walls of the second collecting tank 10 form a structure with a larger upper end and a smaller lower end. From top to bottom, there are arc-shaped walls 46 and flexible walls 47. The arc-shaped walls 46 can be made of steel plates, while the flexible walls 47 are made of rubber plates. The material falling from the two sides of the second screen plate 8 is closer to the arc-shaped walls 46 of the second collecting tank 10 and flows downward through the guidance of the arc-shaped walls 46. The material falling from the middle of the second screen plate 8 is farther away from the second collecting tank 10 and falls onto the flexible walls 47. This can minimize the friction and impact of the screened material, reduce its shedding, and reduce the degree of diameter reduction.

[0069] Optionally, it also includes a housing 48, which is connected to the feeding structure 1 and covers the outside of the conveying structure 2 and the screening structure 3. A dust removal fan 49 is connected to one side of the housing 48.

[0070] Specifically, the outer shell 48 is the overall housing of the fertilizer screening device, which covers the fertilizer screening device as much as possible, leaving openings for operation and material transmission. The dust removal fan 49 is installed on the outer shell 48 to remove dust from the internal space of the outer shell 48, further ensuring the dust removal effect and preventing dust from overflowing. The outer shell 48 can be made of steel plate, and its specific shape and structure are not specifically limited and can be set according to needs.

[0071] like Figure 8 As shown, the present invention also provides a method of using a fertilizer granule screening device, which, based on the above-described fertilizer granule screening device, includes:

[0072] Input the material to be screened into feed structure 1;

[0073] The material is fed into the screening structure 3 through the material conveying structure 2;

[0074] Start the blower 13 and the first exhaust fan 17;

[0075] Under the action of the blower 13 and the exhaust fan, the material passes through the first opening of the cover 12 and passes through the first screen plate 7 and the second screen plate 8 in sequence. The material with a diameter smaller than the standard material diameter falls into the first collection tank 9 through the first screen hole, the material with the standard material diameter falls into the second collection tank 10 through the second screen hole, and the material with a diameter larger than the standard material diameter falls into the third collection tank 11 after passing through the second screen plate 8, and the dust enters the first collection tank 9.

[0076] After a set time period, the first exhaust fan 17 is turned off and the second exhaust fan 18 is turned on. After another set time period, the second exhaust fan 18 is turned off and the first exhaust fan 17 is turned on. This process of alternating between turning on the first exhaust fan 17 and the second exhaust fan 18 is repeated until the fertilizer granules are screened.

[0077] Specifically, the material to be screened is input through the feeding structure 1. The material is then conveyed sequentially using the first guide plate 4, conveyor belt assembly 5, and second guide plate 6 of the conveying structure 2. The first guide plate 4 and second guide plate 6 are arc-shaped, allowing the material to flow in a sliding manner during transport. Simultaneously, the conveyor belt of the conveyor belt assembly 5 is not rigid. This conveying structure 2 reduces the impact and collision generated during the feeding process, minimizing the degree of friction and impact on the material. After entering the screening structure 3, the material passes sequentially through the first screen plate 7 and the second screen plate 8. The diameter of the screen plate is less than... Material of standard diameter falls into the first collection trough 9 through the first screen hole, and into the second collection trough 10 through the second screen hole. Material with a diameter larger than the standard diameter falls into the third collection trough 11 after passing through the second screen plate 8, achieving a continuous flow screening of materials. During this process, the first screen plate 7 and the second screen plate 8 do not vibrate. Instead, a pressure difference is created between the upper and lower sides of the first screen plate 7 and the second screen plate 8 by the action of the blower 13 and the first exhaust fan 17 or the second exhaust fan 18. This pressure difference ensures screening efficiency and reduces the clogging rate of the screen plates. Under the influence of pressure difference, dust can be effectively drawn into the first collection tank 9. Dust in the second collection tank 10 and on the second sieve plate 8 can also enter the first collection tank 9 through the first filter screen 14. Due to the presence of the second filter screen 15 and the third filter screen 16, the dust is trapped in the first collection tank 9 and can be discharged along with small-diameter materials. Furthermore, the second filter screen 15 and the third filter screen 16 are arranged opposite to each other. When the blower 13 and the first exhaust fan 17 are turned on and the second exhaust fan 18 is turned off, the gas pressure causes the second filter screen 15 to bulge outwards. The third filter 16 bulges inward, at which point some dust will be adsorbed on the second filter 15. After a set time, the first exhaust fan 17 is turned off and the second exhaust fan 18 is turned on. This causes the gas pressure to make the second filter 15 bulge inward and the third filter 16 bulge outward. At this time, the dust adsorbed on the second filter 15 will fall into the first collection tank 9, preventing the filter from being blocked by dust and improving the dust collection effect. By repeatedly alternating between turning on the first exhaust fan 17 and the second exhaust fan 18, efficient dust collection can be achieved, preventing dust from overflowing and causing pollution.

[0078] In addition, it also includes:

[0079] The first telescopic component 28 drives the rotating roller 29 to rise and fall, and the first linear module 27 drives its slider to move back and forth. The brush bristles 30 contact the material, promoting the movement and screening of the material. In use, the first telescopic component 28 extends, and the first linear module 27 drives its slider to move to the left. The rotating roller 29 rotates clockwise under the action of the rotation drive component. The brush bristles 30 contact the material on the first screen plate 7. Under the action of the rotation and movement of the brush bristles 30, the material can be promoted to move from the first screen plate 7 to the second screen plate 8, ensuring the movement effect of the material and thus ensuring screening efficiency. When the slider of the first linear module 27 moves to the end, the first telescopic component 28 retracts, so that the brush bristles 30 no longer contact the material, and the slider of the first linear module 27 quickly moves back. The first telescopic component 28 extends again. This process is repeated, which can not only improve the material conveying effect, but also facilitate the material to pass through the first and second screen holes, improve screening efficiency, and reduce screen hole clogging.

[0080] The anti-clogging structure 31 is activated periodically to prevent the second screen plate 8 from becoming clogged. The two second linear modules 32 of the anti-clogging structure 31 drive the sliders on both sides of the second screen plate 8 to move back and forth. Each slider is equipped with a first rotating wheel 33 and a second rotating wheel 34, positioned above and below the second screen plate 8 respectively. Through their movement, the first rotating wheel 33 presses down on the second screen plate 8, and the second rotating wheel 34 presses up on it. Due to their staggered arrangement, the second screen plate 8 undergoes localized deformation under their pressure. As the two second linear modules 32 move their sliders synchronously, the deformation position of the second screen plate 8 gradually shifts, resulting in a wave-like deformation. Under this action, material particles clogged in the second screen holes can fall smoothly into the second collection tank 10, solving the problem of clogged second screen holes. Compared to the traditional screen plate vibration method, this invention uses localized deformation of the second screen plate 8 to address the clogged second screen holes, reducing impact and friction on the material and minimizing dust generation.

[0081] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A fertilizer granule screening apparatus characterized by, The utility model provides a kind of screening device, including: sequentially arranged feed structure, feed structure and screening structure;The feed structure includes feed hopper, and the upper end and the lower end of the feed hopper are respectively provided with feed port and discharge port;The feed structure includes sequentially arranged first guide plate, conveyor belt assembly and second guide plate, the first guide plate is connected with the discharge port, for the material that the discharge port flows out is guided, and the first guide plate and the second guide plate are both arc-shaped;The screening structure includes sequentially arranged first sieve plate and second sieve plate, and the first sieve plate and the second sieve plate are respectively provided with first sieve hole and second sieve hole, and the second sieve hole is matched with the diameter of standard material to enable standard material to pass through the second sieve hole, and the first sieve hole is smaller than the diameter of standard material to enable standard material to be unable to pass through the first sieve hole, and the lower side of the first sieve plate and the second sieve plate is respectively provided with first collecting groove and second collecting groove, and the side of the second collecting groove away from the first collecting groove is provided with third collecting groove;The upper side of the screening structure is provided with cover body, and the end of the cover body close to the second guide plate is provided with first opening, and the first opening is connected with the second guide plate by the first opening, and the upper side of the first opening is provided with second opening, and the second opening is connected with air blower;The first collecting groove and the second collecting groove are communicated by third opening, and the first collecting groove is provided with first filter screen in the third opening, and the opposite two side walls of the first collecting groove are respectively provided with fourth opening and fifth opening, and the fourth opening and the fifth opening are respectively provided with second filter screen and third filter screen, and the outer side of the fourth opening and the fifth opening is respectively connected with first air extractor and second air extractor;The conveyor belt assembly includes driving component and conveyor belt, and the driving component is used to drive the conveyor belt to move in cycle, and the two sides of the conveyor belt are provided with baffle, and the transmission space is formed between the two baffles, and the transmission space is provided with two cross beams along the transmission direction of the conveyor belt, and the cross beam is connected with the baffle, and a plurality of pull ropes are arranged between the two cross beams, and the transmission space is divided into a plurality of transmission channels by the plurality of pull ropes;In the screening process, the first sieve plate and the second sieve plate do not vibrate, but utilize the effect of air blower and first air extractor or second air extractor between the upper side and the lower side of the first sieve plate and the second sieve plate to form pressure difference, utilize pressure difference to ensure screening efficiency, and reduce the plugging rate of sieve plate;Second filter screen and third filter screen are oppositely arranged, and when air blower and first air extractor are opened and second air extractor is closed, gas pressure makes second filter screen bulge outward, and third filter screen bulge inward, at this time, second filter screen will adsorb part of dust, and after a set time, first air extractor is closed and second air extractor is opened, so that gas pressure makes second filter screen bulge inward, and third filter screen bulge outward, at this time, the dust adsorbed on second filter screen falls into first collecting groove, avoids filter screen being blocked by dust, and improves the dust collection effect, and so on alternately opening first air extractor and second air extractor can realize dust collection. ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. The fertilizer granule screening apparatus of claim 1, wherein, The upper end of the feeding hopper is provided with a horn mouth structure to form the feeding port, and the lower end of the feeding hopper is provided with two first circular arc portions, and the lower ends of the two first circular arc portions form a long strip-shaped discharging port, and the interior of the feeding hopper is provided with two second circular arc portions, the second circular arc portions are connected with the first circular arc portions and are on the same circumference, the upper ends of the two second circular arc portions form a distribution port, and the interior center positions of the second circular arc portions and the first circular arc portions are rotatably provided with a distribution shaft, the outer circumference of the distribution shaft is provided with at least three distribution blades in the circumferential direction, the outer ends of the distribution blades are matched with the first circular arc portions and the second circular arc portions, and the distribution blades can enable the material to enter between adjacent two distribution blades through the distribution port and flow out from the discharging port.

3. The fertilizer granule screening apparatus of claim 1, wherein, The interior of the cover body is provided with two first linear modules, the lower sides of the sliders of the two first linear modules are respectively connected with a first telescopic component, the telescopic ends of the two first telescopic components are respectively rotatably connected with a rotating roller, the outer surface of the rotating roller is provided with bristles, at least one end of the rotating roller is provided with a rotary driving component, and the rotary driving component is used to drive the rotating roller to rotate.

4. The fertilizer granule screening apparatus of claim 1, wherein, The sieve plate anti-blocking structure comprises two second linear modules, two first rotating wheels and two second rotating wheels, the two second linear modules are respectively arranged on the two sides of the second sieve plate, the sliders of the two second linear modules are respectively connected with a first rotating wheel and a second rotating wheel, the two first rotating wheels are respectively arranged above the two sides of the second sieve plate in a liftable manner, the two second rotating wheels are respectively arranged below the two sides of the second sieve plate in a liftable manner, each first rotating wheel is matched with a second rotating wheel and the two are staggered, and the two can move towards each other to extrude the second sieve plate, so that the second sieve plate is deformed.

5. The fertilizer granule screening apparatus of claim 4, wherein, The upper side and the lower side of the slider of the second linear module are respectively connected with a first connecting frame and a second connecting frame, the mutually close sides of the first connecting frame and the second connecting frame are respectively connected with a second telescopic component and a third telescopic component, the telescopic ends of the second telescopic component and the third telescopic component are respectively connected with a first bearing seat and a second bearing seat, the first bearing seat and the second bearing seat are respectively provided with a first bearing and a second bearing, and the first bearing and the second bearing are respectively rotatably connected with the first rotating wheel and the second rotating wheel through a first shaft and a second shaft.

6. The fertilizer granule screening apparatus of claim 1, wherein, The lower ends of the first collecting groove, the second collecting groove and the third collecting groove are respectively provided with a first outlet, a second outlet and a third outlet, the first outlet and the third outlet are used to connect an auger conveying assembly, and the auger conveying assembly is used to be connected with a fertilizer production device.

7. The fertilizer granule screening apparatus of claim 6, wherein, The second collecting groove comprises an arc-shaped wall and a flexible wall arranged in sequence from top to bottom, the arc-shaped wall is a circular arc that contracts inward, the material of the flexible wall is rubber, and the flexible wall is an inwardly-contracted structure, and the second outlet is formed at the lower end of the flexible wall.

8. The fertilizer granule screening apparatus of claim 6, wherein, Also include a housing, the housing is connected with the feed structure, the housing cover is arranged outside the feed structure and the screening structure, one side of the housing is connected with a dust removal fan.

9. A method of using a fertilizer granule screening device based on the fertilizer granule screening device according to any one of claims 1-8, characterized in that, Include: The material to be screened is input into the feed structure; The material is input into the screening structure through the feed structure; Start the air blower and the first air extractor; Under the action of the air blower and the first air extractor, the material passes through the first opening of the cover body and in turn passes through the first sieve plate and the second sieve plate, the material with a diameter smaller than the standard material diameter falls into the first collection tank through the first sieve hole, the material with a standard material diameter falls into the second collection tank through the second sieve hole, the material with a diameter larger than the standard material diameter falls into the third collection tank after passing through the second sieve plate, and the dust enters the first collection tank; After a set time, the first air extractor is turned off and the second air extractor is turned on, and after a set time, the second air extractor is turned off and the first air extractor is turned on, and the first air extractor and the second air extractor are repeatedly turned on alternately until the fertilizer particle screening is completed.

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