A feed granulator with uniform granulation

Abstract

The present disclosure relates to the technical field of feed processing, and one embodiment of the present disclosure provides a feed granulator with uniform granulation, which comprises a forming cylinder and a feed hopper connected to the top of the forming cylinder, the forming cylinder is arranged horizontally, a crushing and stirring assembly is arranged in the feed hopper, and an extrusion granulation assembly is arranged in the forming cylinder, the crushing and stirring assembly comprises a top plate fixed to the top of the feed hopper, the top of the feed hopper is of an open structure, the bottom of the top plate is provided with a stirring shaft rotating by power driving, the lower end of the stirring shaft is provided with a connecting frame, and the bottom of the connecting frame is vertically and rotatably connected with a plurality of extrusion rollers. Through the above technical scheme, the technical problem that the raw material pretreatment and the granulation link are insufficiently connected in the prior art, the mixed raw material is prone to be layered or to be humidified and caked during conveying, and the raw material enters the granulation cavity without secondary homogenization, resulting in large density difference of the raw material, is solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of feed processing technology, and more specifically, to a feed pellet mill that produces uniform pellets. Background Technology

[0002] Feed pelleting is a core process in livestock feed production. Pellet uniformity directly determines feed palatability, nutritional balance, and storage stability, and the pelleting precision of the pellet mill is crucial to ensuring these indicators. With the large-scale development of the livestock industry, the problem of uneven feed output from traditional feed pellet mills has become increasingly prominent, becoming a significant pain point restricting feed quality and production efficiency.

[0003] Traditional pellet mills suffer from multiple defects that lead to unevenness: insufficient connection between raw material pretreatment and pelleting; after mixing, raw materials are prone to stratification during transport or agglomeration due to moisture absorption, and enter the pelleting chamber without secondary homogenization, resulting in large differences in raw material density; lack of precise control over the gap between the pressure roller and the die in the pelleting chamber, resulting in uneven pressure transmission; some areas of raw material are not compressed enough to form loose particles, while others are over-compressed and become hard; and there is no real-time screening and shaping structure at the discharge end, so uneven particles are discharged directly without any correction process.

[0004] These issues result in significant variations in pellet size and hardness, leading to picky eating and nutrient imbalances in livestock and poultry, high breakage rates causing waste, and easy clumping during storage. Therefore, developing a feed pellet mill with uniform pelleting has become an urgent need to address these pain points. Utility Model Content

[0005] To overcome the above-mentioned defects, the embodiments of this disclosure provide a feed pellet mill with uniform pelleting, which solves the technical problem in the prior art that the connection between raw material pretreatment and pelleting is insufficient, the raw materials are prone to stratification or moisture absorption and clumping after mixing, and enter the pelleting chamber without secondary homogenization, resulting in large differences in raw material density.

[0006] According to one aspect, at least one embodiment of the present disclosure provides a feed pellet mill that produces uniformly granulated feed, comprising: A forming cylinder and a feeding hopper, wherein the feeding hopper is connected to the top of the forming cylinder and the forming cylinder is horizontally arranged; A crushing and mixing assembly is disposed in the feed hopper; An extrusion granulation assembly is disposed in the forming cylinder; The crushing and mixing assembly includes a top plate, which is fixed to the top of the feed hopper. The top of the feed hopper has an open structure. A stirring shaft driven by electricity is provided at the bottom of the top plate. A connecting frame is provided at the lower end of the stirring shaft. Several extrusion rollers are vertically rotatably connected to the bottom of the connecting frame.

[0007] As a further technical solution, a round rod is provided at the bottom axis position of the connecting frame, and several sets of crushing frames are provided on the round rod. The bottom of the feeding hopper is a sealed structure, and a feeding mesh hole is opened at the bottom of the feeding hopper.

[0008] According to another aspect, in at least one embodiment of the present invention, the extrusion granulation assembly includes an inner shaft, which is electrically driven and rotatably connected inside the forming cylinder. The front end of the forming cylinder is threadedly connected to a granulation cover, and the surface of the granulation cover is provided with a forming discharge hole.

[0009] As a further technical solution, a pushing spiral blade is provided on the inner shaft located inside the forming cylinder, and an extrusion spiral blade is provided on the inner surface of the granulation hood at the front end of the inner shaft. The inner diameter of the connection between the granulation hood and the forming cylinder matches the diameter of the extrusion spiral blade.

[0010] As a further technical solution, an outer frame is provided outside the pelletizing hood, and a drive motor is provided on the side end face of the outer frame. The drive motor and the inner shaft are located on the same axis. A pelletizing blade is provided at the output end of the drive motor, and the cutting edge of the pelletizing blade slides against the surface of the pelletizing hood.

[0011] As a further technical solution, the extrusion rollers are evenly distributed at three points relative to each other, and the extrusion rollers can roll on the inner wall of the feed hopper.

[0012] As a further technical solution, the pelletizing blade has an overall length greater than the radius of the pelletizing hood.

[0013] As a further technical solution, the front end of each set of crushing racks has a toothed structure.

[0014] The beneficial effects of the embodiments disclosed herein are as follows: This disclosure addresses the problems of insufficient raw material pretreatment and large density differences in traditional pellet mills by using a crushing and mixing assembly. Three evenly distributed extrusion rollers roll along the inner wall of the feed hopper, comprehensively crushing moisture-absorbing and agglomerated raw materials, avoiding residual agglomerates caused by localized under-compression. The toothed crushing frame at the bottom of the connecting frame rotates with the mixing shaft, deeply shearing the crushed raw material to further refine the particles and ensure uniform material texture. The feed mesh at the bottom of the feed hopper plays a crucial screening role, allowing only qualified particle sizes to enter subsequent stages, preventing large, incompletely crushed pieces of raw material. This ensures consistent density of raw materials entering the pelleting chamber from the source, avoiding uneven pelleting caused by raw material stratification or agglomeration.

[0015] The entire component achieves secondary homogenization of raw materials, eliminating the need for additional pretreatment equipment, simplifying the production process, laying a solid foundation for subsequent uniform granulation, and solving the core pain point of insufficient raw material connection in traditional granulators. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0017] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure; Figure 2 This is an isometric drawing of the present disclosure; Figure 3 This is an isometric sectional view of the present disclosure; In the diagram: 1. Forming cylinder; 2. Feed hopper; 3. Crushing and mixing assembly; 3-1. Top plate; 3-2. Mixing shaft; 3-3. Connecting frame; 3-4. Extrusion roller; 3-5. Round rod; 3-6. Crushing frame; 3-7. Feeding mesh; 4. Extrusion granulation assembly; 4-1. Inner shaft; 4-2. Granulation hood; 4-3. Forming discharge hole; 4-4. Pushing spiral blade; 4-5. Extrusion spiral blade; 4-6. Outer frame; 4-7. Drive motor; 4-8. Pelletizing blade. Detailed Implementation

[0018] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0019] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0020] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0021] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0023] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] like Figures 1-3 As shown, it illustrates a uniformly pelleting feed pellet mill according to an embodiment of the present disclosure, comprising: A forming cylinder 1 and a feeding hopper 2, wherein the feeding hopper 2 is connected to the top of the forming cylinder 1 and the forming cylinder 1 is horizontally arranged; A crushing and mixing assembly 3 is disposed in the feed hopper 2; An extrusion granulation assembly 4 is disposed in the forming cylinder 1; The crushing and mixing assembly 3 includes a top plate 3-1, which is fixed to the top of the feed hopper 2. The top of the feed hopper 2 is an open structure. The bottom of the top plate 3-1 is provided with a stirring shaft 3-2 that is driven by electricity to rotate. The lower end of the stirring shaft 3-2 is provided with a connecting frame 3-3. Several extrusion rollers 3-4 are vertically rotatably connected to the bottom of the connecting frame 3-3. A round rod 3-5 is provided at the axial position of the bottom of the connecting frame 3-3. Several sets of crushing frames 3-6 are provided on the round rod 3-5. The bottom of the feed hopper 2 is a sealed structure. The bottom of the feed hopper 2 is provided with a discharge mesh hole 3-7.

[0025] In some examples, in order to achieve thorough crushing and homogenization of raw materials and solve the problems of poor granulation quality caused by clumping residue and uneven crushing in traditional devices, a crushing and mixing component 3 was designed. This component includes a feed hopper 2 made of stainless steel welded into shape, with the inner wall polished to prevent raw materials from adhering. The top opening is bolted to the top plate 3-1 through a flange. The top plate 3-1 is a thick steel plate machined part, providing a stable installation benchmark. A motor mounting position is reserved on its top to ensure that the drive components are under stable force and to avoid vibration and displacement during high-speed operation.

[0026] The stirring shaft 3-2 at the bottom of the top plate 3-1 is rigidly connected to the motor output shaft via a deep groove ball bearing. The motor drives stable rotation. The lower end of the stirring shaft 3-2 is welded and fixed to the connecting frame 3-3. The connecting frame 3-3 is a frame structure welded from structural steel to improve overall rigidity. The extrusion roller 3-4 at the bottom of the connecting frame 3-3 is rotatably connected via a pin. The roller surface is hardened and machined with anti-slip texture. When rotating, it fits against the surface of the bottom sealing structure of the feed hopper 2 to crush and break up the agglomerated raw materials. The round rod 3-5 at the center of the connecting frame 3-3 is welded and fixed to the frame. Several sets of crushing frames 3-6 on the rod are spirally distributed. The blades on the crushing frames 3-6 are treated with cutting edges and perform multi-stage shearing and crushing on the crushed raw materials as the stirring shaft 3-2 rotates.

[0027] The feeding mesh 3-7 at the bottom of the feed hopper 2 is formed by stamping, and the mesh size is uniform. It not only plays a screening role, preventing the raw materials that are not completely crushed from falling, but also guides the raw materials into the forming cylinder 1 evenly through the mesh, laying the foundation for subsequent uniform granulation and realizing continuous pretreatment.

[0028] like Figures 1-3 As shown in the figure, the extrusion granulation assembly 4 in this embodiment includes an inner shaft 4-1, which is electrically driven and rotatably connected to the forming cylinder 1. The front end of the forming cylinder 1 is connected to a granulation cover 4-2 by a threaded connection. The surface of the granulation cover 4-2 is provided with a forming discharge hole 4-3. A pushing spiral blade 4-4 is provided on the inner shaft 4-1 located inside the forming cylinder 1. An extrusion spiral blade 4-5 is provided on the front end of the inner shaft 4-1 located on the inner surface of the granulation cover 4-2. The inner diameter of the part of the granulation cover 4-2 connected to the forming cylinder 1 matches the diameter of the extrusion spiral blade 4-5. An outer frame 4-6 is provided outside the granulation cover 4-2. A drive motor 4-7 is provided on the side end face of the outer frame 4-6. The drive motor 4-7 and the inner shaft 4-1 are located on the same axis. A pelletizing blade 4-8 is provided at the output end of the drive motor 4-7. The cutting edge of the pelletizing blade 4-8 slides against the surface of the granulation cover 4-2.

[0029] In some examples, in order to achieve uniform and dense pelleting of feed and solve the problems of uneven feeding and inconsistent pellet size in traditional pellet mills, an extrusion pelleting component 4 was designed. This component includes a forming cylinder 1 made of seamless steel pipe, which is horizontally set and fixed to the frame by a bracket. The inner wall of the cylinder is honed to ensure smoothness and reduce the resistance of raw material conveying. The internal thread at the front end is precisely matched with the external thread of the pelleting cover 4-2, which makes it easy to replace the pelleting cover 4-2 with different forming discharge holes 4-3 according to the pellet specifications, thereby improving the adaptability of the equipment.

[0030] The inner shaft 4-1 is horizontally connected to the bearing seats at both ends of the forming cylinder 1 via tapered roller bearings. It is driven by a geared motor to achieve constant speed rotation, ensuring stable feeding and extrusion rates. The pushing spiral blade 4-4 inside the forming cylinder 1 is integrally formed with the inner shaft 4-1. The spiral lead is uniform, smoothly pushing the raw material falling into the feeding mesh 3-7 forward, avoiding uneven extrusion caused by local accumulation. The extrusion spiral blade 4-5 at the front end of the inner shaft 4-1 has a gradually changing diameter, which is precisely matched with the inner diameter of the connection part of the granulation hood 4-2 to form a gradual extrusion chamber. The raw material is gradually compacted during the pushing process, ensuring consistent particle density.

[0031] The outer frame 4-6 is fixed to the front end of the forming cylinder 1 by bolts. The drive motor 4-7 is horizontally fixed to the side end face of the outer frame 4-6 and is set coaxially with the inner shaft 4-1 to avoid pelleting deviation. The pelleting blade 4-8 at the motor output end is finely ground and the blade slides against the surface of the pelleting cover 4-2. With the high-speed rotation of the motor, it cuts the strip-shaped feed extruded from the forming discharge hole 4-3 into uniform pellets. With a constant pushing and extrusion rate, it achieves dual uniformity in pellet size and density.

[0032] For example, such as Figure 3 As shown, the extrusion rollers 3-4 are evenly distributed at three points relative to each other, and the extrusion rollers 3-4 can roll on the inner wall of the feed hopper 2.

[0033] In some examples, the extrusion rollers 3-4 are evenly distributed at three relative points along the bottom of the connecting frame 3-3, and are rotatably connected to the frame via pins. The roller surface is machined with anti-slip textures and quenched. The outer circle of the extrusion rollers 3-4 precisely fits the inner wall of the feed hopper 2, and rolls along the inner wall as the connecting frame 3-3 rotates. The three-point distribution forms a stable crushing area, comprehensively breaking up agglomerated raw materials while avoiding localized under-pressure and improving the uniformity of breaking up agglomerates.

[0034] For example, such as Figure 3 As shown, the pelletizing blade 4-8 has a length greater than the radius of the pelletizing cover 4-2.

[0035] In some examples, the pelletizing blade 4-8 is made of high-strength alloy material and is precision ground to ensure sharpness. Its overall length is greater than the radius of the pelletizing hood 4-2. The blade is fixed to the output end of the drive motor 4-7 by bolts. When the motor rotates at high speed, the blade can fully cover the forming discharge hole 4-3 on the surface of the pelletizing hood 4-2, ensuring that all extruded strips are cut synchronously and improving the consistency of particle length.

[0036] For example, such as Figure 3 As shown, the front end of each of the crushing racks 3-6 has a toothed structure.

[0037] In some examples, the toothed structure at the front end of the crusher 3-6 is CNC milled, with blunted tooth tips to prevent chipping, and the tooth spacing is evenly distributed. Each set of crushers 3-6 is spirally arranged along the round rod 3-5. When rotating, the toothed structure shears and finely crushes the crushed raw material. The toothed design increases the crushing contact area, and combined with the rotation trajectory, it achieves all-round crushing and improves the fineness of the raw material.

[0038] In actual use: The forming cylinder 1 is horizontally fixed to the frame. The feed hopper 2 is connected to the top of the forming cylinder 1 and locked, ensuring that all parts are securely connected. The outer frame 4-6 is fixed to the front end of the forming cylinder 1. The drive motor 4-7 is coaxially mounted with the inner shaft 4-1. The mixed feed ingredients are added through the top opening of the feed hopper 2. The protective cover is closed, and the electric drive of the crushing and mixing assembly 3 is activated. The mixing shaft 3-2 drives the connecting frame 3-3 to rotate. The three evenly distributed extrusion rollers 3-4 roll along the inner wall of the feed hopper 2, crushing the moisture-absorbing and agglomerated raw materials. The toothed crushing frame 3-6 on the bottom round rod 3-5 of the connecting frame 3-3 rotates synchronously, performing multi-stage shearing and crushing on the crushed raw materials. (Qualified) The raw material falls evenly into the forming cylinder 1 through the feeding mesh 3-7 at the bottom of the feeding hopper 2. The drive motor 4-7 of the extrusion granulation component 4 is started, and the inner shaft 4-1 drives the pushing spiral blades 4-4 to push the raw material forward at a uniform speed. After the raw material enters the granulation hood 4-2, it is gradually compacted by the extrusion spiral blades 4-5 and extruded into regular strips through the forming discharge holes 4-3 on the surface of the granulation hood 4-2. At the same time, the drive motor 4-7 of the pelletizing blades 4-8 is started. The blades rotate at high speed against the surface of the granulation hood 4-2, cutting the strip-shaped raw material into uniform particles. If it is necessary to change the particle size, after stopping the machine, unscrew the granulation hood 4-2, replace the corresponding part of the forming discharge hole 4-3, and restart to continue the granulation operation.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A feed pellet mill with uniform pelleting, characterized in that, include: A forming cylinder (1) and a feeding hopper (2), wherein the feeding hopper (2) is connected to the top of the forming cylinder (1), and the forming cylinder (1) is horizontally arranged; A crushing and stirring assembly (3) is disposed in the feed hopper (2); An extrusion granulation assembly (4) is disposed in the forming cylinder (1); The crushing and mixing assembly (3) includes a top plate (3-1), which is fixed to the top of the feed hopper (2). The top of the feed hopper (2) is an open structure. The bottom of the top plate (3-1) is provided with a stirring shaft (3-2) that is driven to rotate by electricity. The lower end of the stirring shaft (3-2) is provided with a connecting frame (3-3). The bottom of the connecting frame (3-3) is vertically rotatably connected to a number of extrusion rollers (3-4).

2. The feed pellet mill with uniform pelleting as described in claim 1, characterized in that, A round rod (3-5) is provided at the bottom axis of the connecting frame (3-3), and several sets of crushing racks (3-6) are provided on the round rod (3-5). The bottom of the feeding hopper (2) is a sealed structure, and the bottom of the feeding hopper (2) is provided with a discharge mesh hole (3-7).

3. The feed pellet mill with uniform pelleting according to claim 1, characterized in that, The extrusion granulation assembly (4) includes an inner shaft (4-1), which is electrically driven to rotate inside the forming cylinder (1). The front end of the forming cylinder (1) is connected to a granulation cover (4-2) by a threaded connection, and the surface of the granulation cover (4-2) is provided with a forming discharge hole (4-3).

4. The feed pellet mill with uniform pelleting according to claim 3, characterized in that, A pushing spiral blade (4-4) is provided on the inner shaft (4-1) located inside the forming cylinder (1). An extrusion spiral blade (4-5) is provided on the front end of the inner shaft (4-1) located on the inner surface of the granulation hood (4-2). The inner diameter of the part connecting the granulation hood (4-2) and the forming cylinder (1) matches the diameter of the extrusion spiral blade (4-5).

5. A feed pellet mill with uniform pelleting as described in claim 4, characterized in that, An outer frame (4-6) is provided outside the granulation hood (4-2). A drive motor (4-7) is provided on the side end face of the outer frame (4-6). The drive motor (4-7) and the inner shaft (4-1) are located on the same axis. A pelletizing blade (4-8) is provided at the output end of the drive motor (4-7). The cutting edge of the pelletizing blade (4-8) slides against the surface of the granulation hood (4-2).

6. The feed pellet mill with uniform pelleting according to claim 1, characterized in that, The extrusion rollers (3-4) are evenly distributed at three points relative to each other, and the extrusion rollers (3-4) can roll on the inner wall of the feed hopper (2).

7. A feed pellet mill with uniform pelleting as described in claim 5, characterized in that, The pelletizing blade (4-8) has a length greater than the radius of the pelletizing cover (4-2).

8. A feed pellet mill with uniform pelleting as described in claim 2, characterized in that, The front end of each of the crushing racks (3-6) is a toothed structure.

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