Coated slow-release fertilizer production device

Abstract

The invention discloses a coated slow-release fertilizer production device, and particularly relates to slow-release fertilizer production equipment, the coated slow-release fertilizer production device comprises a rotary drum, the rotary drum is sequentially provided with a spray ring, the output end of the spray ring faces the inlet of the rotary drum; the material cleaning mechanism comprises an inner rotating disc coaxially and movably arranged in the rotating drum, an outer cover frame is arranged in the rotating drum, an annular channel is formed between the outer cover frame and the inner rotating disc, and a cutting plate is arranged on the inner rotating disc; and the inner rotating disc rotates at a double speed or in a direction opposite to the rotating drum. By means of the outer cover frame and the inner rotating disc which are arranged in the rotating drum, in the fertilizer coating process, the annular channel formed by the outer cover frame and the inner rotating disc limits the coated fertilizer, after limiting, staggered movement is achieved when the inner rotating disc rotates at a double speed or in the direction opposite to the rotating drum, and the fertilizer in the annular channel is cut by the cutting plate; and separating the small balls of the pure coating material attached to the fertilizer from the fertilizer.

Description

Technical Field

[0001] The invention relates to the technical field of slow-release fertilizer production, in particular to a film-coated slow-release fertilizer production device. Background Art

[0002] Coated slow-release fertilizer is a chronic fertilizer with an outer layer wrapped with a film that regulates the release of fertilizer, which allows the inorganic fertilizer in the inner layer to be released slowly, extending the fertilization time.

[0003] According to patent number CN112624884A, publication (announcement) date: 2021-04-09, a drum coating fluidized drying film-forming system for a water-based resin-coated slow-release fertilizer is disclosed.

[0004] In the prior art including the above-mentioned patent, in the batch production of coated slow-release fertilizers, the fertilizer core is mostly coated by a rotary drum. The coating material is paraffin or water-based resin that needs to be heated, and the finished product is obtained by cooling during the coating process. However, during the cooling process, due to the need for rolling and coating, the liquid coating material is easily cooled into agglomerates, forming small particles of pure coating material. The small balls are also easy to condense and adhere to the fertilizer, making them difficult to separate. Summary of the Invention

[0005] The purpose of the present invention is to provide a film-coated slow-release fertilizer production device to solve the above problems.

[0006] In order to achieve the above object, the present invention provides the following technical solution: a film-coated slow-release fertilizer production device, comprising a rotary drum, on which are sequentially provided:

[0007] a spray ring, the output end of which faces the inlet of the drum;

[0008] A material cleaning mechanism comprises an inner rotating disc coaxially movably arranged in the rotating drum, an outer cover frame is arranged in the rotating drum, an annular channel is formed between the outer cover frame and the inner rotating disc, and a cutting plate is arranged on the inner rotating disc;

[0009] Wherein, the inner turntable rotates at a double speed or in the opposite direction to the rotating drum.

[0010] Preferably, a lifting disc is provided on the inner turntable, and the lifting disc transports materials to the annular channel as it rotates.

[0011] Preferably, a cutting channel is provided on the outer cover frame along the axial direction, and a thread line is provided on the cutting channel. The cutting channel restricts the fertilizer from moving and rotating along the axial direction as the inner turntable rotates.

[0012] Preferably, the drum outlet is provided with a movably provided screening frame, and the drum is provided with a filter screen corresponding to the screening frame.

[0013] Preferably, carding plates are arranged in a circumferential array on the inner turntable, and a number of columnar thorns are arranged on the carding plates.

[0014] Preferably, an extrusion disc is arranged on the outer cover frame, and a plurality of extrusion plates facing the annular channel outlets are arranged in a circumferential array on the extrusion disc, and the extrusion plates are driven to intermittently close and extrude the fertilizer.

[0015] Preferably, a driving shaft is arranged on the central axis of the inner turntable, and a number of pushing rods for pushing against the extrusion plates are arranged on the driving shaft.

[0016] Preferably, cutting blades are arranged on the cutting plate, a material receiving frame is clamped on the cutting plate, and metal wires are placed in the material receiving frame.

[0017] Preferably, an inclined angle is formed on the outer cover frame, and a rounded corner is formed between the inclined angle and the material cutting channel.

[0018] Preferably, the cross section of the extrusion plate is semi-circular arc-shaped, one end of the extrusion plate is fixed to the extrusion disc, and the other end is provided with an extension plate.

[0019] In the above technical solution, a production device for coated slow-release fertilizer provided by the present invention has the following beneficial effects: during the process of coating the fertilizer, the annular channel formed by the outer cover frame and the inner turntable restricts the coated fertilizer. After the restriction, the dislocation movement is realized when the inner turntable rotates at a multiple speed or in the reverse direction of the rotating drum. The cutting plate cuts the fertilizer in the annular channel, and separates the small balls of pure coating material attached to the fertilizer from the fertilizer. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is the overall schematic diagram provided by the embodiment of the present invention;

[0022] Figure 2 It is the exploded schematic diagram of the outer cover frame and the net material mechanism provided by the embodiment of the present invention;

[0023] Figure 3 It is Figure 2 The enlarged schematic diagram at A in

[0024] Figure 4Explosion schematic diagram of the rotary drum and the net material mechanism provided by the embodiment of the present invention;

[0025] Figure 5 Overall cross-sectional schematic diagram provided by the embodiment of the present invention;

[0026] Figure 6 Schematic diagram of the net material mechanism provided by the embodiment of the present invention;

[0027] Figure 7 Explosion schematic diagram of the net material mechanism provided by the embodiment of the present invention;

[0028] Figure 8 It is Figure 7 Enlarged schematic diagram at position B in;

[0029] Figure 9 Another perspective cross-sectional schematic diagram of the whole provided by the embodiment of the present invention;

[0030] Figure 10 It is Figure 9 Enlarged schematic diagram at position C in;

[0031] Figure 11 It is Figure 9 Enlarged schematic diagram at position D in.

[0032] Explanation of reference numerals:

[0033] 1. Rotary drum; 11. Through groove; 111. Connecting rod; 12. Spray ring; 121. Nozzle; 13. Base; 2. Net material mechanism; 20. Drive shaft; 201. Pushing rod; 21. Outer cover frame; 211. Cutting channel; 212. Thread line; 213. Fillet; 214. Chamfer; 22. Inner turntable; 221. Installation groove; 23. Lifting plate; 231. Lifting plate; 232. Inclined surface; 24. Cutting plate; 240. Material receiving frame; 241. Material receiving groove; 242. Cutting blade; 25. Combing plate; 26. Extrusion disc; 261. Extrusion plate; 262. Extension plate; 263. Feeding hole; 3. Screening frame; 31. Filter screen. Detailed implementation manners

[0034] In order to make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0035] As Figure 1-11 shown, a film-coated slow-release fertilizer production device includes a rotary drum 1, and the following are sequentially arranged on the rotary drum 1:

[0036] A spray ring 12, whose output end faces the entrance of the rotating drum 1;

[0037] A net material mechanism 2, which includes an inner turntable 22 coaxially and movably arranged inside the rotating drum 1. An outer cover frame 21 is arranged inside the rotating drum 1. An annular channel is formed between the outer cover frame 21 and the inner turntable 22. Cutting plates 24 are arranged on the inner turntable 22;

[0038] Wherein, the inner turntable 22 rotates at double speed or reversely to the rotating drum 1.

[0039] Specifically, both ends of the rotating drum 1 are respectively an entrance and an exit. The opening diameter of the entrance is smaller than that of the exit. The spray ring 12 is close to the entrance. A through groove 11 is formed on the rotating drum 1. The spray ring 12 is fixed on the through groove 11. A number of nozzles 121 are arranged in a circumferential array on the spray ring 12. The heated coating material is sprayed out by the nozzles 121. As the rotating drum 1 rotates continuously, the fertilizer tumbles in the rotating drum 1 and adheres to the coating material. A small part of the coating material cools and condenses, and forms coating material small balls with the rolling and adheres or independently cools. Immediately afterwards, the fertilizer tumbles into the annular channel. The size of the annular channel is 1-1.5 mm larger than that of the fertilizer. With the rotation of the inner turntable 22 and the outer cover frame 21 being misaligned, the cutting plates 24 will cut the fertilizer, so as to remove the coating material small balls adhered to the fertilizer.

[0040] Furthermore, the inner turntable 22 can be supported by an external bracket and suspended inside the rotating drum 1 to achieve coaxial arrangement with the rotating drum 1. The inner turntable 22 can be driven by a motor to rotate at double speed or reversely to the rotating drum 1. Considering energy conservation and emission reduction and the service life of the product, the optimal choice is to rotate reversely to the rotating drum 1 to achieve the misalignment of the outer cover frame 21 and the inner turntable 22 for cutting.

[0041] The rotating drum 1 further includes a base 13 for bearing. A toothed ring is arranged on the rotating drum 1. The toothed ring is driven by a driving motor and cooperates with a speed reducer to drive the toothed ring, so as to drive the rotating drum 1 to rotate. The rotating drum 1 being a granulator is prior art and will not be elaborated. Specifically, reference can be made to a rotary drum granulator.

[0042] In the above technical solution, through the outer cover frame 21 and the inner turntable 22 arranged inside the rotating drum 1, during the process of coating the fertilizer, the annular channel formed by the outer cover frame 21 and the inner turntable 22 restricts the coated fertilizer. The misaligned movement realized when the inner turntable 22 rotates at double speed or reversely to the rotating drum 1 causes the cutting plates 24 to cut the fertilizer in the annular channel, and separates the small balls of pure coating material attached to the fertilizer from the fertilizer.

[0043] As an embodiment provided by the present invention, a lifting plate 23 is arranged on the inner turntable 22, and the lifting plate 23 conveys materials to the annular channel as it rotates.

[0044] Specifically, the lifting plate 23 is fixedly inserted into the inner turntable 22 and moves together with the rotation of the inner turntable 22. An inclined surface 232 is provided on the annular surface of the lifting plate 23, and the lower position of the inclined surface 232 faces the annular channel. A plurality of lifting plates 231 are arranged in a circumferential array on the annular surface of the lifting plate 23. When the inner turntable 22 rotates reversely to the outer cover frame 21, the lifting plates 231 will lift and disperse the fertilizer and then enter the annular channel, thereby increasing the efficiency of passing the fertilizer.

[0045] As an embodiment provided by the present invention, a cutting channel 211 is axially provided on the outer cover frame 21, and a thread 212 is provided on the cutting channel 211. The cutting channel 211 restricts the fertilizer from moving and rotating along the axial direction with the rotation of the inner turntable 22.

[0046] Specifically, the cutting channel 211 is a semi-cylindrical groove body, and a thread 212 is provided on the cutting channel 211. The thread 212 can be a combination of a thread groove and a thread protrusion. The cutting channel 211 is used to restrict the passage of the fertilizer, so that the fertilizer entering the annular channel can only move along the cutting channel 211 and is guided by the thread 212 to rotate. The restricted fertilizer is more easily cut when rotating past the cutting plate 24, increasing the efficiency of cutting the small balls of the pure coating material.

[0047] Further, an inclined angle 214 is provided on the outer cover frame 21, and a fillet 213 is provided between the inclined angle 214 and the cutting channel 211. As Figure 9 and Figure 2 shown, the inclined angle 214 provides a moving range for the lifting plate 231 and can rotate, while the fillet 213 always guides the fertilizer lifted by the lifting plate 231 into the cutting channel 211.

[0048] As an embodiment provided by the present invention, a screening frame 3 is movably provided at the outlet of the drum 1, and a filter screen 31 corresponding to the screening frame 3 is provided on the drum 1.

[0049] Specifically, the screening frame 3 is fixed by a frame. A through groove 11 is provided on the drum 1 near the outlet side, and a plurality of connecting rods 111 for connecting the drum 1 are provided on the through groove 11. The screening frame 3 is rotatably connected to the through groove 11, and a filter screen 31 corresponding to the screening frame 3 is provided on the drum 1. The filter screen 31 is used to filter the independently formed small balls of the coating material and part of the cut small balls of the coating material and collect them for subsequent recycling.

[0050] As an embodiment provided by the present invention, a plurality of combing plates 25 are arranged in a circumferential array on the inner turntable 22, and a number of columnar thorns are provided on the combing plates 25.

[0051] Specifically, two sets of mounting grooves 221 are formed on the inner turntable 22, and a cutting plate 24 and a carding plate 25 are respectively mounted in the two sets of mounting grooves 221;

[0052] When fertilizers are input at the entrance of the rotary drum 1, plant fibers of 2-4 mm are doped. When the fertilizer is sprayed out by the spray ring 12, the plant fibers can be attached to the surface layer of the fertilizer, increasing the supporting force of the coating layer and making it more wear-resistant. When the stacked fertilizers are transported, the coating layer is not easily damaged, ensuring the normal release of the slow-release fertilizer. The plant fibers are easily mixed with the coating material to form small balls. The small balls are first cut by the cutting plate 24 on the inner turntable 22, and then the plant fibers attached to the surface of the incompletely solidified fertilizer are carded by a number of columnar thorns on the carding plate 25, so as to regularize the texture of the plant fibers and form grooves, which are used to reduce the rolling of the fertilizer.

[0053] As the most preferred embodiment of the present invention, when no plant fibers are doped, when the cutting plate 24 on the inner turntable 22 cuts off the small balls of the pure coating material attached thereto, a number of columnar thorns on the carding plate 25 card the surface of the fertilizer to form grooves, thereby reducing the rolling of the fertilizer.

[0054] As an embodiment provided by the present invention, an extrusion disc 26 is provided on the outer cover frame 21. A number of extrusion plates 261 facing the annular channel outlet are arranged in a circumferential array on the extrusion disc 26, and the extrusion plates 261 are driven to intermittently close to extrude the fertilizer.

[0055] Specifically, a blanking hole 263 corresponding to the cutting channel 211 is provided on the extrusion disc 26. A cylindrical channel is formed between the extrusion plate 261 and the cutting channel 211 on the outer cover frame 21. When the fertilizer is pushed by the subsequent fertilizer into the cylindrical channel, the extrusion plate 261 is driven to intermittently close to extrude the fertilizer, so as to smooth the two sides of the groove hooked by the columnar thorns on the carding plate 25, making the final fertilizer small balls more round and regular.

[0056] Furthermore, a driving shaft 20 is arranged on the central axis of the inner turntable 22. The driving shaft 20 is used to connect to the external output end (the output end can be the cooperation of a speed reducer and a motor). A number of pushing rods 201 for pushing against the extrusion plate 261 are arranged on the driving shaft 20. The extrusion plate 261 (the extrusion plate 261 is made of an elastic metal sheet) has a semi-circular arc cross-section. One end of the extrusion plate 261 is fixed to the extrusion disc 26 (the fixing method can be connection by fasteners), and the other end is provided with an extension plate 262. When the inner turntable 22 and the outer cover frame 21 are misaligned, the pushing rod 201 will push against the extension plate 262, driving the extrusion plate 261 to close, so as to extrude the fertilizer small balls.

[0057] As an embodiment provided by the present invention, a material receiving groove 241 is formed on the cutting plate 24, a cutting blade 242 is arranged on the material receiving groove 241, and a material receiving frame 240 is clamped on the cutting plate 24 (the clamping method can be snap clamping or clamping with a protruding elastic metal sheet). A metal wire is placed in the material receiving frame 240. When the cutting plate 24 cuts the small balls of the pure coating material on the fertilizer, some small balls will fall into the material receiving frame 240 for collection. The metal wire in the material receiving frame 240 is arranged vertically for discharging materials. The small balls will get stuck in the metal wire to prevent them from falling out and returning to the cutting channel 211, which is also convenient for subsequent collection. When the small balls in the material receiving frame 240 are full, the small balls falling into the cutting channel 211 can also be screened along with the filter screen 31 of the screening frame 3.

[0058] First, pour the fertilizer into the inlet of the rotary drum 1, and spray the heated coating material onto the fertilizer through the spray ring 12. As the rotary drum 1 rotates continuously, the fertilizer tumbles in the rotary drum 1 and adheres to the coating material. A small part of the coating material cools and condenses, forming small balls of the coating material as it rolls, which stick together or cool independently. Subsequently, the inner turntable 22 rotates, and the lifting plate 231 will lift and disperse the fertilizer and then enter the cutting channel 211. The cutting channel 211 restricts the fertilizer from moving and rotating along the axial direction as the inner turntable 22 rotates. The small balls of the pure coating material on the fertilizer are separated from the fertilizer by the cutting plate 24. Immediately afterwards, several columnar thorns on the combing plate 25 comb the surface of the fertilizer to form grooves and send the fertilizer into the cylindrical channel. At this time, as the inner turntable 22 rotates, the pushing rod 201 will push against the extension plate 262, driving the squeezing plate 261 to close, thereby squeezing the fertilizer and discharging the squeezed fertilizer from the discharge hole 26. The discharged fertilizer, the independently formed small balls of the coating material, and some of the cut small balls of the coating material are screened on the filter screen 31 as the rotary drum 1 rotates. The fertilizer is discharged, and the small balls of the coating material fall into the screening frame 3 for subsequent recycling.

[0059] Only some exemplary embodiments of the present invention have been described by way of illustration above. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A production device for coated slow-release fertilizer, including a rotary drum (1), characterized in that, On the said rotary drum (1), the following are successively arranged: A spray ring (12) whose output end faces the entrance of the said rotary drum (1); A net material mechanism (2) which includes an inner turntable (22) coaxially and movably arranged inside the said rotary drum (1). An outer cover frame (21) is arranged inside the said rotary drum (1). An annular channel is formed between the said outer cover frame (21) and the said inner turntable (22). Cutting plates (24) are arranged on the said inner turntable (22); Wherein, the said inner turntable (22) rotates at a multiple speed or in the reverse direction of the said rotary drum (1).

2. The production device of a coated slow-release fertilizer according to claim 1, characterized in that, Lifting plates (23) are arranged on the said inner turntable (22), and the said lifting plates (23) convey materials to the annular channel as they rotate.

3. The production device of a coated slow-release fertilizer according to claim 1, characterized in that, A cutting channel (211) is axially opened on the said outer cover frame (21), and a thread line (212) is arranged on the said cutting channel (211). The said cutting channel (211) restricts the fertilizer from moving and rotating along the axial direction as it rotates with the said inner turntable (22).

4. The production device of a coated slow-release fertilizer according to claim 1, characterized in that, A screening frame (3) is movably arranged at the exit of the said rotary drum (1), and a filter screen (31) corresponding to the said screening frame (3) is arranged on the said rotary drum (1).

5. The production device of a coated slow-release fertilizer according to claim 3, characterized in that, Combing plates (25) are arranged in a circumferential array on the said inner turntable (22), and a number of columnar thorns are arranged on the said combing plates (25).

6. The production device of a coated slow-release fertilizer according to claim 1, characterized in that, An extrusion plate (26) is arranged on the said outer cover frame (21). A number of groups of extrusion plates (261) facing the exit of the annular channel are arranged in a circumferential array on the said extrusion plate (26). The said extrusion plates (261) are driven to intermittently close and extrude the fertilizer.

7. The production device of a coated slow-release fertilizer according to claim 6, characterized in that, 8. The production device of a coated slow-release fertilizer according to claim 1, characterized in that, A driving shaft (20) is arranged on the central axis of the said inner turntable (22), and a number of pushing rods (201) for pushing against the said extrusion plates (261) are arranged on the said driving shaft (20).

9. A production device for coated slow-release fertilizer according to claim 3, characterized in that, Cutting blades (242) are arranged on the said cutting plates (24), and a receiving frame (240) is clamped on the said cutting plates (24), and metal wires are placed inside the said receiving frame (240).

10. The production device of a coated slow-release fertilizer according to claim 6, characterized in that, An inclined angle (214) is opened on the said outer cover frame (21), and a fillet (213) is opened between the said inclined angle (214) and the said cutting channel (211). The cross-section of the said extrusion plate (261) is semi-circular arc-shaped. One end of the said extrusion plate (261) is fixed to the extrusion plate (26), and the other end is provided with an extension plate (262).

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