Granulation device for long-acting slow-release granular fertilizer

The integration of a granulation conveyor belt and extrusion rollers in the fertilizer manufacturing device addresses the issues of inconsistent particle size and low efficiency, resulting in uniform and efficiently produced long-term slow-release granular fertilizers.

CN223096727UActive Publication Date: 2025-07-15KINGENTA ECOLOGICAL ENG GRP +3
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Patent Information

Application Number
CN202422361535.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-27
Publication Date
2025-07-15
Estimated Expiration
2034-09-27

AI Technical Summary

Technical Problem

When preparing long-term sustained-release granulation fertilizers, existing granulation equipment has problems of uneven particle size and low production efficiency.

Method used

The granulation conveyor belt is used to cooperate with the extrusion roller, and the combination of molding holes, extrusion rollers and demolding rollers is used, combining the design of the shock-shaping components and the driving components to ensure uniform molding and efficient production of particles.

Benefits of technology

The uniform size of fertilizer particles is achieved, production efficiency is improved, and the operating stability and safety of the device are improved.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a granulating device for a long-acting slow-release granular fertilizer, and belongs to the technical field of chemical fertilizer production devices. The device mainly comprises a frame, a conveying structure, a leakage stopping plate, a granulation assembly and a jolt ramming assembly, wherein the conveying structure is composed of a granulation conveying belt and a first driving assembly; the leakage stopping plate is arranged in the granulation conveying belt; the granulation assembly comprises a hopper, an extrusion roller and a demolding roller, the hopper, the extrusion roller and the demolding roller are all connected with the frame and arranged on the side, back on to the leakage stopping plate, of the granulation conveying belt, and the bottom opening edge of the hopper abuts against the granulation conveying belt; pressing rods matched with the forming holes are arranged on the outer side walls of the extrusion roller and the demolding roller; the jolt ramming assembly is arranged on the side, opposite to the granulation conveying belt, of the leakage stopping plate, and the jolt ramming assembly and the hopper are located on the same straight line. According to the utility model, the granulation conveying belt is matched with the extrusion rollers, so that the prepared fertilizer particles are uniform in size, and the production efficiency is improved. The granulating machine is mainly used for granulating and processing the fertilizer.
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Description

Technical Field

[0001] The utility model belongs to the technical field of chemical fertilizer production devices, and more specifically, it relates to a granulating device for long-acting slow-release granular fertilizers. Background Art

[0002] In agricultural fertilizer production, long-acting slow-release granular fertilizers have become an important choice in modern agriculture because they can continuously and stably release nutrients, improve fertilizer utilization efficiency, and reduce the number of fertilization times. However, when existing granulating equipment is used to prepare long-acting slow-release granular fertilizers, problems such as uneven particle size and low production efficiency often occur. Therefore, it is particularly important to design a granulating device for long-acting slow-release granular fertilizers that is efficient, precise, and easy to maintain. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a granulating device for long-acting slow-release granular fertilizers, which makes the prepared fertilizer particles have uniform size and improves its production efficiency through the cooperation of the provided granulating conveyor belt and the extrusion roller.

[0004] The described granulating device for long-acting slow-release granular fertilizers includes a frame, a conveying structure, a leak-proof plate, a granulating assembly, and a compaction assembly. The conveying structure consists of a granulating conveyor belt and a first driving assembly, and multiple forming holes penetrating from one side to the other are provided on the surface of the granulating conveyor belt; the leak-proof plate is arranged inside the granulating conveyor belt and abuts against the granulating conveyor belt; the granulating assembly includes a hopper, an extrusion roller, and a demolding roller. The hopper, the extrusion roller, and the demolding roller are all connected to the frame and are sequentially arranged on the side of the granulating conveyor belt facing away from the leak-proof plate, and the bottom edge of the hopper is in contact with the granulating conveyor belt; among them, pressing rods adapted to the forming holes are provided on the outer side walls of the extrusion roller and the demolding roller; the compaction assembly is arranged on the side of the leak-proof plate facing away from the granulating conveyor belt and is on the same straight line as the hopper.

[0005] Preferably, the compaction assembly includes a crankshaft, a vibrating rod, and a limiting assembly. Multiple curved grooves are provided on the crankshaft, and a vibrating rod rotatably connected is installed in each curved groove; one end of adjacent vibrating rods away from the curved grooves shares a limiting assembly, and the vibrating rod is movably connected to the limiting assembly.

[0006] Preferably, the limiting assembly includes a connecting rod, a limiting plate, and a fixing bolt rod. There are multiple connecting rods, one end of which is fixedly connected to the limiting plate through the fixing bolt rod, and the other end is provided with a connecting plate and is fixedly connected to the leak-proof plate.

[0007] Preferably, the limiting plate includes a main body, a follower plate, and a linkage shaft. There are multiple follower plates, which are arranged in an opposing manner on the parallel side walls of the main body, and a linkage shaft is installed between the main body and the follower plate.

[0008] Preferably, the linkage shaft includes a fixed plug, a bearing, and a bolt. The fixed plug has a tower-shaped structure with one end smaller than the other end. The smaller end is connected to the bearing, and the bolt is connected to the smaller end of the fixed plug. The outer walls of the fixed plug and the bearing are each provided with a protrusion that surrounds them in a circle.

[0009] Preferably, the granulation assembly further includes a second drive assembly, which consists of a drive machine bracket, a second drive machine, a drive wheel, a first linkage wheel, a second linkage wheel, a third linkage wheel, a first tensioning wheel, a second tensioning wheel, and a belt. The drive machine bracket is fixed to one side of the frame and is on the same longitudinal straight line as the extrusion roller. The second drive machine is fixedly connected to the drive machine bracket, and its power output shaft passes through the side wall of the frame and protrudes to one side of the side wall of the drive machine bracket. The drive wheel is fixedly connected to the power output shaft of the second drive machine. The first linkage wheel is fixedly connected to one end of the crankshaft, the second linkage wheel is fixedly connected to one end of the extrusion roller, and the third linkage wheel is fixedly connected to one end of the demolding roller. The first tensioning wheel and the second tensioning wheel are installed between the drive wheel and the second linkage wheel and are arranged adjacent to each other. The belt is sleeved on the outer sides of the drive wheel, the first linkage wheel, the second linkage wheel, the third linkage wheel, the first tensioning wheel, and the second tensioning wheel.

[0010] Preferably, the first drive assembly includes a first roller, a second roller, and a first drive machine. The first roller and the second roller are respectively installed at both ends of the frame. The first drive machine is fixed on the outer side wall of the frame, and its power output end is connected to the first roller or the second roller.

[0011] Preferably, a plurality of support legs fixedly connected to the frame are installed on the peripheral side of the leak-proof plate.

[0012] Preferably, a discharge plate is further installed in the granulation conveyor belt, which is on the same longitudinal straight line as the demolding roller and is fixedly connected to the frame.

[0013] Preferably, a side plate is installed on one side of the frame, and a protective shell is installed on the other side, and both are fixedly connected to the frame.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] 1. By the cooperation of the granulation conveyor belt and the extrusion roller, the size of the prepared fertilizer particles is uniform, and the production efficiency is improved. Description of the Drawings

[0016] Figure 1 It is the front view of the present utility model;

[0017] Figure 2 It is the front view of the internal structure of the present utility model;

[0018] Figure 3 Rear view of the internal structure of the present utility model;

[0019] Figure 4 Front view of the compaction component of the present utility model;

[0020] Figure 5 Schematic diagram of the limiting component structure of the present utility model;

[0021] Figure 6 Schematic diagram of the limiting plate structure of the present utility model;

[0022] Figure 7 Schematic diagram of the second driving component structure of the present utility model;

[0023] Figure 8 Schematic diagram of the first driving component structure of the present utility model;

[0024] Figure 9 Schematic diagram of the leak-proof plate structure of the present utility model.

[0025] In the figure, 100, frame; 101, discharge plate; 102, side plate; 103, protective shell; 200, conveying structure; 210, granulation conveyor belt; 211, forming holes; 220, first driving component; 221, first roller; 222, second roller; 223, first driving machine; 300, leak-proof plate; 400, granulation component; 410, hopper; 420, extrusion roller; 430, demolding roller; 440, second driving component; 441, driving machine support; 442, second driving machine; 443, driving wheel; 444, first linkage wheel; 445, second linkage wheel; 446, third linkage wheel; 447, first tensioning wheel; 448, second tensioning wheel; 449, belt; 500, compaction component; 510, crankshaft; 511, curved groove; 520, vibrating rod; 530, limiting component; 531, connecting rod; 5311, connecting plate; 532, limiting plate; 533, fixing bolt rod; 5321, main body; 5322, follower plate; 5323, linkage shaft; 5324, fixing plug; 5325, bearing; 5326, bolt. Detailed implementation mode

[0026] The present utility model will be further described below with reference to the accompanying drawings:

[0027] The orientation terms involved in the paragraphs of the detailed description are only for the convenience of those skilled in the art to understand the technical solutions described in this application according to the visual orientation shown in the accompanying drawings. Unless otherwise clearly defined and limited, the terms "set", "installed", "connected", etc. should be understood in a broad sense. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] As shown Figures 1 to 9 in the figure, a granulating device for long-acting slow-release granular fertilizer includes a frame 100, a conveying structure 200, a leak-proof plate 300, a granulating assembly 400, and a compaction assembly 500. The conveying structure 200 is composed of a granulating conveyor belt 210 and a first driving assembly 220. A plurality of forming holes 211 penetrating from one side to the other side are provided on the surface of the granulating conveyor belt 210. The leak-proof plate 300 is arranged inside the granulating conveyor belt 210 and abuts against the granulating conveyor belt 210. The granulating assembly 400 includes a hopper 410, an extrusion roller 420, and a demolding roller 430. The hopper 410, the extrusion roller 420, and the demolding roller 430 are all connected to the frame 100 and are sequentially arranged on the side of the granulating conveyor belt 210 facing away from the leak-proof plate 300, and the bottom edge of the hopper 410 abuts against the granulating conveyor belt 210. Among them, pressing rods adapted to the forming holes 211 are provided on the outer side walls of the extrusion roller 420 and the demolding roller 430. The compaction assembly 500 is arranged on the side of the leak-proof plate 300 facing away from the granulating conveyor belt 210 and is on the same straight line as the hopper 410. In this way, before processing, the raw materials are filled into the hopper 410, and the raw materials at the bottom of the hopper 410 will fall into the forming holes 211 of the granulating conveyor belt 210. After the equipment is started, the granulating conveyor belt 210 rotates cyclically, and the raw materials continuously fall into the forming holes 211. Since the bottom of the hopper 410 abuts against the granulating conveyor belt 210, during the movement of the granulating conveyor belt 210, the hopper 410 can scrape the granulating conveyor belt 210 flat to prevent the raw materials from leaking out from the connection between the two. While the granulating conveyor belt 210 is moving, the compaction assembly 500 continuously knocks on the bottom of the leak-proof plate 300 to compact the raw materials in the forming holes 211, so that the raw materials are initially formed and ensure that the forming holes 211 can be fully filled. As the granulating conveyor belt 210 moves, the forming holes 211 filled with raw materials move to the position of the extrusion roller 420 and mesh with its pressing rod, so that the pressing rod extrudes the raw materials in the forming holes 211 until the extruded forming holes 211 leave the extrusion working area of the pressing rod. The formed forming holes 211 are transported by the granulating conveyor belt 210 to the position of the demolding roller 430. At this time, the bottom of the granulating conveyor belt 210 is separated from the leak-proof plate 300. After the formed raw materials in the forming holes 211 mesh with the pressing rod on the outer side wall of the demolding roller 430, the formed raw materials in the forming holes 211 are pushed out by the demolding roller 430, so that the formed raw materials are separated from the forming holes 211, and thus the granulation work of the fertilizer is completed.

[0029] As shown Figure 4As shown, the compaction assembly 500 includes a crankshaft 510, a vibrating rod 520, and a limiting assembly 530. A plurality of curved grooves 511 are provided on the crankshaft 510, and a rotatably connected vibrating rod 520 is installed in each curved groove 511. One end of two adjacent vibrating rods 520 away from the curved groove 511 shares a limiting assembly 530, and the vibrating rod 520 is movably connected to the limiting assembly 530. In this way, the vibrating rod 520 can reciprocate in a specific angle direction towards the leak-proof plate 300 driven by the crankshaft 510. At the same time, through the limiting assembly 530 installed on the top of the vibrating rod 520, the running track of the vibrating rod 520 can be effectively restricted, ensuring that the vibrating rod 520 can always reciprocate in a specific angle, so that the vibrating rod 520 can stably strike the leak-proof plate 300. The compaction degree of the raw materials in the forming hole 211 is effectively improved.

[0030] As Figure 5 shown, the limiting assembly 530 includes a connecting rod 531, a limiting plate 532, and a fixing bolt rod 533. A plurality of connecting rods 531 are provided. One end of each connecting rod 531 is fixedly connected to the limiting plate 532 through the fixing bolt rod 533, and the other end is provided with a connecting plate 5311 and is fixedly connected to the leak-proof plate 300. In this way, the limiting plate 532 can be always at a specific height through the mutual cooperation of the connecting rod 531 and the fixing bolt rod 533 to ensure effective limiting of the vibrating rod 520, thereby improving the running stability of the vibrating rod 520.

[0031] As Figure 5 and Figure 6 shown, the limiting plate 532 includes a main body 5321, a follower plate 5322, and a linkage shaft 5323. A plurality of follower plates 5322 are provided and are arranged in an opposing manner on the side walls parallel to the main body 5321, and a linkage shaft 5323 is installed between the main body 5321 and the follower plate 5322. In this way, the follower plate 5322 is rotatably connected to the main body 5321 through the linkage shaft 5323. After the follower plate 5322 is movably connected to the vibrating rod 520, the follower plate 5322 can change its angle following the reciprocating movement of the vibrating rod 520. Thus, while the follower plate 5322 effectively limits the vibrating rod 520, it does not affect the reciprocating movement of the vibrating rod 520, not only improving the working efficiency of the vibrating rod 520 but also improving the working stability of the vibrating rod 520.

[0032] As Figure 6As shown, the linkage shaft 5323 includes a fixing plug 5324, a bearing 5325, and a bolt 5326. The fixing plug 5324 has a tower-shaped structure with one end smaller than the other end. The smaller end is connected to the bearing 5325, and the bolt 5326 is connected to the smaller end of the fixing plug 5324. Among them, raised portions surrounding the outer walls of both the fixing plug 5324 and the bearing 5325 are provided. In this way, with the assistance of tools, the fixing plug 5324 is fixedly connected to the follower plate 5322 and the bearing 5325 respectively through the raised portions provided on the outer side wall. Similarly, the bearing 5325 is also fixedly connected to the main body 5321 through the raised portion provided on the outer side wall with the help of tools. In addition, between the fixing plug 5324 and the bearing 5325, secondary reinforcement is carried out through the bolt 5326, thereby improving the connection strength between the fixing plug 5324 and the bearing 5325.

[0033] As Figure 7As shown, the granulation assembly 400 further includes a second drive assembly 440, which consists of a drive machine bracket 441, a second drive machine 442, a drive wheel 443, a first linkage wheel 444, a second linkage wheel 445, a third linkage wheel 446, a first tensioning wheel 447, a second tensioning wheel 448, and a belt 449. The drive machine bracket 441 is fixed to one side of the frame 100 and is on the same longitudinal straight line as the extrusion roller 420. The second drive machine 442 is fixedly connected to the drive machine bracket 441, and its power output shaft passes through the side wall of the frame 100 and protrudes to one side of the side wall of the drive machine bracket 441. The drive wheel 443 is fixedly connected to the power output shaft of the second drive machine 442. The first linkage wheel 444 is fixedly connected to one end of the crankshaft 510, the second linkage wheel 445 is fixedly connected to one end of the extrusion roller 420, and the third linkage wheel 446 is fixedly connected to one end of the demolding roller 430. The first tensioning wheel 447 and the second tensioning wheel 448 are installed between the drive wheel 443 and the second linkage wheel 445 and are arranged adjacent to each other. The belt 449 is sleeved outside the drive wheel 443, the first linkage wheel 444, the second linkage wheel 445, the third linkage wheel 446, the first tensioning wheel 447, and the second tensioning wheel 448. In this way, through the cooperation of the second drive machine 442 and the drive wheel 443, the first linkage wheel 444, the second linkage wheel 445, the third linkage wheel 446, the first tensioning wheel 447, and the second tensioning wheel 448 are driven to rotate synchronously. At the same time, through the cooperation of the first tensioning wheel 447 and the second tensioning wheel 448, the tension degree of the belt 449 can be adjusted automatically, avoiding operation failures of the second drive assembly 440 caused by the belt 449 being too tight or too loose. Thus, the operation stability of the second drive assembly 440 is effectively improved. In addition, since the extrusion roller 420 is connected to the second linkage wheel 445 and the demolding roller 430 is connected to the third linkage wheel 446, the meshing of the extrusion roller 420 and the demolding roller 430 with the granulation conveyor belt 210 can provide a certain driving force for the operation of the granulation conveyor belt 210.

[0034] As Figure 8 shown, the first drive assembly 220 includes a first roller 221, a second roller 222, and a first drive machine 223. The first roller 221 and the second roller 222 are respectively installed at both ends of the frame 100. The first drive machine 223 is fixed on the outer side wall of the frame 100, and its power output end is connected to the first roller 221 or the second roller 222. In this way, after the first drive machine 223 is connected to the first roller 221 or the second roller 222, through the cooperation with the granulation conveyor belt 210 connected thereto, the first roller 221, the second roller 222, and the granulation conveyor belt 210 form a linkage, thereby driving the granulation conveyor belt 210 to perform reciprocating rotation work.

[0035] As Figure 9As shown, a plurality of support legs fixedly connected to the frame 100 are installed on the peripheral side of the leak-proof plate 300. In this way, the leak-proof plate 300 can be stably fixed on the support by the provided support legs. In addition, supported by the support plate, the side of the leak-proof plate 300 facing the granulation conveyor belt 210 can be in close contact with the granulation conveyor belt 210. Thus, when the raw materials in the forming holes 211 move along with the granulation conveyor belt 210, it is not easy to leak out from the connection between the leak-proof plate 300 and the granulation conveyor belt 210.

[0036] Optionally, a discharge plate 101 is further installed in the granulation conveyor belt 210, which is on the same longitudinal straight line as the demolding roller 430, and the discharge plate 101 is fixedly connected to the frame 100. In this way, the formed raw materials ejected by the demolding roller 430 can be discharged centrally through the discharge plate 101 for subsequent work or bagging.

[0037] Optionally, a side plate 102 is installed on one side of the frame 100, and a protective shell 103 is installed on the other side, and both are fixedly connected to the frame 100. In this way, the overall device can be protected by the side plate 102 and the protective shell 103 to prevent the situation of personal injury or device damage caused by contact between staff or other objects and the device. Thus, the safety protection of the device operation is improved.

[0038] Finally, although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A granulating device for a long-acting slow-release granular fertilizer, comprising a frame (100), a conveying structure (200), a leak-proof plate (300), a granulating assembly (400), and a compaction assembly (500), characterized in that: The conveying structure (200) is composed of a granulating conveyor belt (210) and a first driving assembly (220). Multiple forming holes (211) penetrating from one side to the other side are provided on the surface of the granulating conveyor belt (210). The leak-proof plate (300) is arranged inside the granulating conveyor belt (210) and abuts against the granulating conveyor belt (210). The granulating assembly (400) includes a hopper (410), an extrusion roller (420), and a demolding roller (430). The hopper (410), the extrusion roller (420), and the demolding roller (430) are all connected to the frame (100) and are sequentially arranged on one side of the granulating conveyor belt (210) facing away from the leak-proof plate (300), and the bottom edge of the hopper (410) abuts against the granulating conveyor belt (210). Among them, pressing rods adapted to the forming holes (211) are provided on the outer side walls of the extrusion roller (420) and the demolding roller (430). The compaction assembly (500) is arranged on one side of the leak-proof plate (300) facing away from the granulating conveyor belt (210) and is on the same straight line as the hopper (410).

2. The granulating device for a long-acting slow-release granular fertilizer according to claim 1, characterized in that: The compaction assembly (500) includes a crankshaft (510), a vibrating rod (520), and a limiting assembly (530). Multiple curved grooves (511) are provided on the crankshaft (510), and a vibrating rod (520) connected by rotation is installed in each curved groove (511). One end of adjacent two vibrating rods (520) away from the curved grooves (511) shares a limiting assembly (530), and the vibrating rod (520) is movably connected to the limiting assembly (530).

3. The granulating device for a long-acting slow-release granular fertilizer according to claim 2, wherein: The limiting assembly (530) includes connecting rods (531), a limiting plate (532), and fixing bolt rods (533). A plurality of connecting rods (531) are provided. One end of each connecting rod is fixedly connected to the limiting plate (532) through a fixing bolt rod (533), and the other end is provided with a connecting plate (5311) and is fixedly connected to the leak-proof plate (300).

4. A granulating device for a long-acting slow-release granular fertilizer according to claim 3, characterized in that: The limiting plate (532) includes a main body (5321), a follower plate (5322), and a linkage shaft (5323). A plurality of follower plates (5322) are provided and are arranged in an opposing manner on the side walls parallel to the main body (5321), and a linkage shaft (5323) is installed between the main body (5321) and the follower plate (5322).

5. The granulation device for a long-acting slow-release granular fertilizer according to claim 4, characterized in that: The linkage shaft (5323) includes a fixing plug (5324), a bearing (5325), and a bolt (5326). The fixing plug (5324) has a tower-shaped structure with one end smaller than the other end. The smaller end is connected to the bearing (5325), and the bolt (5326) is connected to the smaller end of the fixing plug (5324). Among them, protrusions surrounding one week are provided on the outer walls of the fixing plug (5324) and the bearing (5325).

6. The granulating device for a long-acting slow-release granular fertilizer according to claim 1, characterized in that: The granulation assembly (400) further includes a second drive assembly (440), which consists of a drive machine support (441), a second drive machine (442), a drive wheel (443), a first linkage wheel (444), a second linkage wheel (445), a third linkage wheel (446), a first tensioning wheel (447), a second tensioning wheel (448), and a belt (449). The drive machine support (441) is fixed to one side of the frame (100) and is on the same longitudinal straight line as the extrusion roller (420); the second drive machine (442) is fixedly connected to the drive machine support (441), and its power output shaft passes through the side wall of the frame (100) and protrudes to one side of the side wall of the drive machine support (441); the drive wheel (443) is fixedly connected to the power output shaft of the second drive machine (442); the first linkage wheel (444) is fixedly connected to one end of the crankshaft (510), the second linkage wheel (445) is fixedly connected to one end of the extrusion roller (420); the third linkage wheel (446) is fixedly connected to one end of the demolding roller (430); the first tensioning wheel (447) and the second tensioning wheel (448) are installed between the drive wheel (443) and the second linkage wheel (445) and are adjacent to each other; the belt (449) is sleeved outside the drive wheel (443), the first linkage wheel (444), the second linkage wheel (445), the third linkage wheel (446), the first tensioning wheel (447), and the second tensioning wheel (448).

7. The granulation device for a long-acting slow-release granular fertilizer according to claim 1, wherein: The first drive assembly (220) includes a first roller (221), a second roller (222), and a first drive machine (223). The first roller (221) and the second roller (222) are respectively installed at both ends of the frame (100); the first drive machine (223) is fixed on the outer side wall of the frame (100), and its power output end is connected to the first roller (221) or the second roller (222).

8. A granulating device for a long-acting slow-release granular fertilizer according to claim 1, characterized in that: A plurality of support legs (301) fixedly connected to the frame (100) are installed on the peripheral side of the leak-proof plate (300).

9. A granulating device for a long-acting slow-release granular fertilizer according to any one of claims 1 to 8, characterized in that: An outlet plate (101) is further installed inside the granulation conveyor belt (210), which is on the same longitudinal straight line as the demolding roller (430), and the outlet plate (101) is fixedly connected to the frame (100).

10. A granulating device for a long-acting slow-release granular fertilizer according to any one of claims 1 to 8, characterized in that: A side plate (102) is installed on one side of the frame (100), and a protective shell (103) is installed on the other side, and both are fixedly connected to the frame (100).