A feed precision conditioning device for improving pellet forming rate

Abstract

The utility model relates to feed processing machinery technical field discloses a kind of feed precision modulation devices of promoting granular forming rate.The device includes feeding cylinder, output structure, extrusion assembly and carrier basket.Feeding cylinder is equipped with stirring assembly with support frame inside, and double-bolt extrusion roller is rotatably connected in the extrusion assembly, and its outer wall is tightly covered with cooling assembly of integrated circulation heat dissipation pipeline and air-cooled hollow frame.Cutting assembly is installed in the top of carrier basket, and the component is driven by the second hollow column of rotation inside sliding connecting column, and connecting column bottom end is fixed cutting-off knife, and cutting-off knife is always elastically attached to the discharge end surface of extrusion assembly by built-in spring.The utility model is through the synergistic effect of stirring premix, constant-temperature extrusion and elastic compensation cutting, effectively prevent feed from high-temperature expansion deformation, and automatically compensate tool wear gap, significantly improve the cutting quality and final forming rate of feed granule.

Description

Technical Field

[0001] This utility model relates to the field of feed processing machinery and equipment technology, and in particular to a feed precision conditioning device for improving pellet forming rate. Background Technology

[0002] In modern livestock farming, to facilitate animal consumption, digestion, absorption, storage, and transportation, powdered feed ingredients are typically processed into pelleted feed through mixing, preparation, and extrusion. Pellet formation rate is a crucial indicator for evaluating feed processing quality. It encompasses multiple dimensions, including pellet density, shape regularity, and surface smoothness, directly impacting the grade and market competitiveness of the finished feed product.

[0003] However, existing feed preparation equipment often has certain limitations in actual operation. On the one hand, during the high-pressure conveying and extrusion of raw materials through the screw, intense friction occurs between the material and the inner wall of the barrel, leading to a rapid increase in local temperature. Traditional equipment usually lacks an efficient and circulating cooling and temperature control system, which makes the feed at the discharge port prone to expansion and deformation due to high temperature, and even scorching and denaturation, resulting in loose extruded strips that cannot maintain the predetermined geometric shape.

[0004] On the other hand, as a crucial step in determining the final shape of the pellets, most existing cutting mechanisms use a rigid connection to fix the cutter to the rotating shaft. With prolonged continuous operation, mechanical wear inevitably occurs between the cutter edge and the extrusion die surface, resulting in a cutting gap. Because this rigid structure cannot automatically compensate for the wear gap, phenomena such as blade overlap, uneven cuts, burrs, or large amounts of powder are prone to occur during cutting. This thermal deformation caused by thermal effects, combined with the reduced cutting accuracy due to mechanical structural defects, severely reduces the final pellet formation rate.

[0005] Therefore, this utility model proposes a feed precision conditioning device to improve pellet forming rate in order to overcome the shortcomings of the prior art. Utility Model Content

[0006] To overcome the above deficiencies, this utility model provides a feed precision mixing device to improve pellet forming rate. It aims to improve the problems in the prior art, such as uneven mixing of feed raw materials, material expansion and deformation caused by high temperature during extrusion, and uneven cut surface caused by rigid cutting, which affect the pellet forming rate.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a feed precision conditioning device for improving pellet forming rate, comprising: a feed cylinder, an output structure disposed on one side of the feed cylinder, an extrusion assembly fixedly connected to the side of the feed cylinder away from the output structure, and a feed basket fixedly connected to the end of the extrusion assembly away from the feed cylinder.

[0008] The power output end of the output structure is connected to a bolted extrusion roller extending into the interior of the extrusion assembly. A stirring assembly is installed inside the feed cylinder, a cooling assembly covers the outer wall of the extrusion assembly, and a cutting assembly is installed on the top of the material loading basket.

[0009] The extrusion assembly includes a first hollow column, and the bolted extrusion roller is rotatably connected to the interior of the first hollow column. The cooling assembly includes a hollow frame fixed to the outer wall of the first hollow column and a heat dissipation pipe communicating with the liquid inside the hollow frame. The cutting assembly includes a second hollow column with its drive end fixed to the top of the material basket, and a connecting column slidably fitted inside the second hollow column, with a cutting blade fixed to the bottom end of the connecting column.

[0010] Preferably, the stirring assembly includes a second motor belt drive structure fixedly connected to the outer wall of the feed cylinder, and a stirring roller rotatably connected to the inside of the feed cylinder. The output shaft of the second motor belt drive structure passes through the side wall of the feed cylinder and is fixedly connected to the stirring roller. A support frame is rotatably connected to one end of the stirring roller away from the second motor belt drive structure. The support frame is fixedly connected to the inner wall of the feed cylinder. A plurality of stirring blades are fixedly connected to the outer circumferential surface of the stirring roller.

[0011] Preferably, there are two bolt extrusion rollers, which are arranged side by side inside the first hollow column and mesh with each other. The heat dissipation pipe is spirally wound and fixed to the outer wall of the first hollow column.

[0012] Preferably, a plurality of heat dissipation fins are fixedly connected to the inner wall of the hollow frame, a fan for dissipating heat from the heat dissipation fins is fixedly installed on the outer wall of the hollow frame, and a second bracket for support is fixedly connected to the bottom of the hollow frame.

[0013] Preferably, the cutting assembly further includes a first motor belt drive structure fixedly connected to the top of the material basket. The output end of the first motor belt drive structure is fixedly connected to the top of the second hollow column and drives it to rotate. A first bracket is fixedly connected to the outer circumferential surface of the second hollow column. The end of the first bracket away from the second hollow column abuts against the top of the side wall of the material basket.

[0014] Preferably, a limiting block is fixedly connected to one end sidewall of the connecting column located inside the second hollow column, a guide groove is provided on the inner wall of the second hollow column for the limiting block to slide axially, and a spring is fixedly connected between the upper surface of the limiting block and the inner wall of the second hollow column.

[0015] Preferably, the spring is in a compressed state, and the side of the cutting blade is elastically attached to the discharge end face of the first hollow column under the elastic force of the spring.

[0016] Preferably, both ends of the heat dissipation pipe pass through the side wall of the hollow frame and communicate with the interior of the hollow frame. The hollow frame is fitted over the outside of the first hollow column and the two are fixedly connected by bolts.

[0017] This utility model has the following beneficial effects: 1. This utility model solves the problems of blade breakage, burrs, and uneven cut surfaces caused by wear and gaps in traditional rigid connecting blades after long-term use. It utilizes the continuous elastic force of the spring to push the cutting blade to always keep it in close contact with the discharge end face of the extrusion component. This achieves the technical effect of automatically compensating for blade wear gaps, maintaining zero gap for precise cutting, and significantly improving the cutting quality and final forming rate of feed pellets.

[0018] 2. This utility model solves the problem of high-temperature expansion, denaturation, or scorching of feed caused by intense friction during extrusion, by covering the outer wall of the extrusion assembly with a cooling component that combines liquid cooling circulation and air cooling. The heat generated during extrusion is efficiently absorbed by the wound heat dissipation pipes, and forced convection heat exchange is achieved through the heat dissipation fins and fan in the hollow frame. This achieves the technical effect of strictly controlling the extrusion temperature, ensuring that the extruded strip is firm and smooth, and preventing the deformation of the finished product. Attached Figure Description

[0019] Figure 1 This is a perspective view of a feed precision preparation device for improving pellet forming rate according to the present invention. Figure 2 This is a schematic diagram of the outer wall structure of the extrusion component of a feed precision conditioning device for improving pellet forming rate, as proposed in this utility model. Figure 3 This is a schematic cross-sectional view of the cutting component of a feed precision conditioning device for improving pellet forming rate, as proposed in this utility model. Figure 4 This is a schematic cross-sectional view of the extrusion component of a feed precision conditioning device for improving pellet forming rate, as proposed in this utility model. Figure 5This is an exploded view of the cooling component of a feed precision conditioning device for improving pellet forming rate, as proposed in this utility model. Figure 6 This is a schematic diagram of the inner wall structure of the stirring component of a feed precision conditioning device for improving pellet forming rate, as proposed in this utility model.

[0020] Legend: 1. Feed cylinder; 2. Output structure; 3. Extrusion assembly; 301. Bolted extrusion roller; 302. First hollow column; 4. Cutting assembly; 401. Second hollow column; 402. First motor belt drive structure; 403. Connecting column; 404. Cutting blade; 405. Limiting block; 406. Spring; 407. First bracket; 5. Cooling assembly; 501. Hollow frame; 502. Fan; 503. Heat dissipation fins; 504. Heat dissipation pipe; 505. Second bracket; 6. Mixing assembly; 601. Second motor belt drive structure; 602. Mixing roller; 603. Support frame; 604. Mixing blade; 7. Material loading basket. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Reference Figures 1-6 This utility model provides an embodiment of a feed precision conditioning device for improving pellet forming rate, comprising a feed cylinder 1 serving as a raw material carrier and pretreatment site, and an output structure 2 disposed on one side of the feed cylinder 1 for providing the main extrusion power. An extrusion assembly 3 is fixedly connected to the side of the feed cylinder 1 away from the output structure 2 by a flange or bolts. The extrusion assembly 3 serves as a high-pressure forming channel for the material, and its interior is conveyed and extruded by a twin-screw structure. A material carrying basket 7 is fixedly connected to the end of the extrusion assembly 3 away from the feed cylinder 1. The material carrying basket 7 is used to receive and collect the final feed pellets. To ensure the uniformity of the raw material before entering the extrusion process, a stirring assembly 6 is installed inside the feed cylinder 1. To control the temperature during the extrusion process to prevent feed denaturation, a cooling assembly 5 is tightly wrapped around the outer wall of the extrusion assembly 3. To precisely segment the extruded strips, a cutting assembly 4 is installed on the top of the material carrying basket 7. The components are connected in sequence to form a complete automated production line from raw material mixing, constant temperature extrusion to precision cutting.

[0023] Specifically, the feed cylinder 1 serves as the feed inlet of the device, with a feed inlet on its side wall. The internal space of the feed cylinder 1 is sufficient to accommodate the feed raw materials to be processed. The stirring assembly 6 includes a second motor belt drive structure 601 fixedly connected to the outer wall of the feed cylinder 1. The second motor belt drive structure 601 uses a motor and pulley to buffer overload protection of the motor. The output shaft of the second motor belt drive structure 601 passes through the side wall of the feed cylinder 1 and extends into the interior. This output shaft is fixedly connected to a stirring roller 602 located inside the feed cylinder 1. The stirring roller 602 moves along the feed cylinder 1... The feed cylinder 1 extends horizontally along its axis. To ensure the stability of the stirring roller 602 during high-speed rotation, the end of the stirring roller 602 away from the second motor belt drive structure 601 is not suspended, but is rotatably connected to a support frame 603. The support frame 603 is a triangular or frame structure fixedly connected to the inner wall of the feed cylinder 1, thereby providing double-end support for the stirring roller 602. Several stirring blades 604 are evenly distributed and fixedly connected to the outer circumference of the stirring roller 602. When rotating, the stirring blades 604 can turn over and mix the raw materials piled in the feed cylinder 1 in all directions.

[0024] In the extrusion section after the material is evenly mixed, the extrusion assembly 3 includes a first hollow column 302 as the main body of the outer shell. A high-pressure extrusion channel is formed inside the first hollow column 302. The power output end of the output structure 2 is connected to a bolt extrusion roller 301 extending into the first hollow column 302. The bolt extrusion roller 301 is rotatably connected inside the first hollow column 302. To enhance the extrusion effect and the shear force of the material, the number of bolt extrusion rollers 301 is preferably two. The two bolt extrusion rollers 301 are arranged side-by-side inside the first hollow column 302 and mesh with each other. Through the meshing action of the twin screws, the material is forced forward and... To further homogenize the material and meet the heat dissipation requirements of the extrusion assembly 3, the cooling assembly 5 includes a hollow frame 501 fixed to the outer wall of the first hollow column 302 and a heat dissipation pipe 504 communicating with the liquid inside the hollow frame 501. The heat dissipation pipe 504 is made of a metal material with good thermal conductivity and is spirally wound and fixed to the outer wall of the first hollow column 302. The two ends of the heat dissipation pipe 504 pass through the side wall of the hollow frame 501 and communicate with the interior of the hollow frame 501, thereby forming a closed liquid circulation loop. The hollow frame 501 is fitted onto the outside of the first hollow column 302 and the two are fixedly connected by bolts to ensure structural stability. To further improve cooling efficiency and ensure the stability of device operation, in this embodiment, the hollow frame 501 of the cooling component 5 serves as the core container for heat exchange. Several heat dissipation fins 503 that increase the heat dissipation area are fixedly connected to the inner wall of the hollow frame 501. A fan 502 is fixedly installed on the outer wall of the hollow frame 501, facing the position of the heat dissipation fins 503. During operation, the airflow generated by the fan 502 directly acts on the back of the heat dissipation fins 503 or performs forced convection heat exchange through the heat-conducting wall surface of the hollow frame 501, thereby quickly removing the heat of the liquid inside the hollow frame 501 circulated into the hollow frame 501 by the heat dissipation pipe 504. The bottom of the hollow frame 501 is fixedly connected to the ground or the device base through the second bracket 505. The second bracket 505 plays an auxiliary support role to reduce the load on the extrusion component 3.

[0025] Based on this, in order to solve the problem of uneven particle cut surfaces caused by traditional rigid cutting, the cutting component 4 at the end of the device adopts a unique structural design that combines rotary drive and elastic compensation. Please refer to the following for details. Figure 3 and Figure 4 The first motor belt drive structure 402 is fixedly installed on the top plane of the material basket 7. The output end of the first motor belt drive structure 402 is vertically downward and fixedly connected to the top of the second hollow column 401. The second hollow column 401, as the mounting carrier of the cutter, rotates axially under the drive of the first motor belt drive structure 402. In order to prevent the second hollow column 401 from shaking or eccentric during high-speed rotation, a first bracket 407 is fixedly connected to the outer circumferential surface of the second hollow column 401. The first bracket 407 extends outward in a cantilever shape, and the end of the first bracket 407 away from the second hollow column 401 slides against or rotates against the top of the side wall of the material basket 7. The cooperation between the first bracket 407 and the material basket 7 restricts the radial swing of the second hollow column 401 and ensures the stability of the rotation axis.

[0026] To achieve the elastic extension and retraction function of the cutter, the interior of the second hollow column 401 is not a solid structure, but has a through hole along the axial direction to form a receiving cavity. The connecting column 403 is installed in the receiving cavity of the second hollow column 401 in a sliding fit manner. The connecting column 403 can reciprocate linearly along the axial direction inside the second hollow column 401. The part of the connecting column 403 extending out of the bottom end of the second hollow column 401 is fixedly installed with a cutting blade 404 for cutting feed. The cutting blade 404 rotates synchronously with the connecting column 403 and the second hollow column 401. Due to the axial sliding relationship between the connecting column 403 and the second hollow column 401, the cutting blade 404 has the ability to make fine adjustments in the vertical direction. As a key structure for achieving elastic compensation in the cutting assembly 4, the connecting column 403 is located inside the second hollow column 401. One end of the side wall is integrally formed or welded to a limiting block 405. The limiting block 405 extends outward in the shape of a lug. Correspondingly, the inner wall of the second hollow column 401 is provided with a guide groove along the axial direction for the limiting block 405 to slide. The limiting block 405 is inserted into the guide groove, which on the one hand restricts the circumferential rotation of the connecting column 403 relative to the second hollow column 401, ensuring that the torque can be effectively transmitted to the cutting blade 404. On the other hand, it limits the axial movement stroke of the connecting column 403 to prevent it from falling off.

[0027] More importantly, a compressed spring 406 is installed between the upper surface of the limiting block 405 and the inner top wall or a set step surface of the second hollow column 401. The spring 406 always applies a downward pushing force to the limiting block 405. This pushing force is transmitted to the cutting blade 404 through the connecting column 403, forcing the side of the cutting blade 404 to elastically fit against the discharge end face of the first hollow column 302. This elastic pressing mechanism allows the cutting blade 404 to automatically advance towards the discharge end face under the action of the spring 406 after long-term use and wear, always maintaining a zero-gap cutting state. This effectively avoids the phenomenon of continuous cutting or burrs caused by excessive blade gap, and greatly improves the forming quality of the particles.

[0028] In addition, in terms of the detailed design of the heat dissipation system, in order to maximize the heat exchange efficiency, the heat dissipation pipe 504 spirally wound around the outer wall of the first hollow column 302 can be filled with thermal grease or an interference fit can be used to reduce thermal resistance. Meanwhile, the heat dissipation fins 503 in the hollow frame 501 are preferably made of copper or aluminum alloy with high thermal conductivity and are arranged in an array to provide the maximum heat dissipation surface area in a limited space. The installation position of the fan 502 is directly opposite the airflow channel inlet of the heat dissipation fins 503 to ensure that the cold air can penetrate the entire area of ​​the heat dissipation fins 503.

[0029] Working principle: In the initial stage of device startup, the operator first puts the feed raw materials prepared according to the formula into the feed cylinder 1. At this time, the stirring component 6 is started. The second motor belt drive structure 601 drives the stirring roller 602 to rotate at high speed under the auxiliary support of the support frame 603. The stirring blades 604 fixed on the stirring roller 602 tumble in the feed cylinder 1, which forces the raw materials to premix and homogenize, eliminates the agglomeration of raw materials and ensures the uniformity of their moisture and density, laying the foundation for subsequent high-quality molding.

[0030] After the raw materials are mixed evenly, they enter the extrusion process. The output structure 2 drives the double-bolt extrusion roller 301 located inside the first hollow column 302 to rotate synchronously in opposite directions. The two screws mesh with each other to generate a strong axial thrust and shear force, which compresses and plasticizes the loose feed raw materials and pushes them toward the discharge end of the first hollow column 302. During this process, the material generates a lot of heat due to friction. At this time, the cooling component 5 plays a role. The heat dissipation pipe 504 absorbs the heat from the outer wall of the first hollow column 302 and transfers it to the circulating liquid flowing through it. The heat-absorbing liquid enters the hollow frame 501 and is rapidly cooled by the synergistic heat dissipation effect of the fan 502 and the heat dissipation fins 503. The cooled liquid flows back to the heat dissipation pipe 504. This cycle repeats, strictly controlling the extrusion temperature within a suitable range, effectively preventing the feed from expanding, scorching, or deforming due to high temperature, and ensuring that the extruded strips are firm and have a smooth surface.

[0031] Finally, when the formed strip is extruded from the end of the first hollow column 302, the cutting assembly 4 operates synchronously. The first motor belt drive structure 402 drives the second hollow column 401 and the cutting blade 404 to rotate. Since the spring 406 always applies a spring force to the connecting column 403 towards the discharge end, the side of the cutting blade 404 is pressed tightly against the discharge end face of the first hollow column 302. Regardless of whether the blade is worn or the discharge end face is slightly uneven, the cutting blade 404 can maintain elastic fit under the compensation of the spring 406, accurately cutting the continuously extruded strip into uniformly sized particles, which finally fall into the material basket 7 for collection. The whole process achieves high forming rate precision modulation from raw materials to finished products.

Claims

1. A feed precision preparation device for improving pellet forming rate, comprising: Feed cylinder (1), output structure (2) set on one side of feed cylinder (1), extrusion assembly (3) fixedly connected to the side of feed cylinder (1) away from output structure (2), and material basket (7) fixedly connected to the end of extrusion assembly (3) away from feed cylinder (1). The power output end of the output structure (2) is connected to a bolt extrusion roller (301) that extends into the extrusion assembly (3). Its features are, The feed cylinder (1) is equipped with a stirring assembly (6), the outer wall of the extrusion assembly (3) is covered with a cooling assembly (5), and the top of the loading basket (7) is equipped with a cutting assembly (4). The extrusion assembly (3) includes a first hollow column (302), and the bolt extrusion roller (301) is rotatably connected to the interior of the first hollow column (302); The cooling assembly (5) includes a hollow frame (501) fixed to the outer wall of the first hollow column (302) and a heat dissipation pipe (504) connected to the liquid inside the hollow frame (501). The cutting assembly (4) includes a second hollow column (401) with its drive end fixed to the top of the material basket (7), and a connecting column (403) that is slidably fitted inside the second hollow column (401). A cutting blade (404) is fixed to the bottom end of the connecting column (403).

2. The feed precision preparation device for improving pellet forming rate according to claim 1, characterized in that, The stirring assembly (6) includes a second motor belt drive structure (601) fixedly connected to the outer wall of the feed cylinder (1) and a stirring roller (602) rotatably connected to the inside of the feed cylinder (1). The output shaft of the second motor belt drive structure (601) passes through the side wall of the feed cylinder (1) and is fixedly connected to the stirring roller (602). A support frame (603) is rotatably connected to one end of the stirring roller (602) away from the second motor belt drive structure (601). The support frame (603) is fixedly connected to the inner wall of the feed cylinder (1). A plurality of stirring blades (604) are fixedly connected to the outer circumferential surface of the stirring roller (602).

3. The feed precision preparation device for improving pellet forming rate according to claim 1, characterized in that, There are two bolt extrusion rollers (301), which are arranged side by side inside the first hollow column (302) and mesh with each other. The heat dissipation pipe (504) is spirally wound and fixed to the outer wall of the first hollow column (302).

4. The feed precision preparation device for improving pellet forming rate according to claim 1, characterized in that, The hollow frame (501) has a number of heat dissipation fins (503) fixedly connected to its inner wall, and a fan (502) for dissipating heat from the heat dissipation fins (503) is fixedly installed on the outer wall of the hollow frame (501). The bottom of the hollow frame (501) is fixedly connected to a second bracket (505) for support.

5. The feed precision preparation device for improving pellet forming rate according to claim 1, characterized in that, The cutting assembly (4) further includes a first motor belt drive structure (402) fixedly connected to the top of the material basket (7). The output end of the first motor belt drive structure (402) is fixedly connected to the top of the second hollow column (401) and drives it to rotate. A first bracket (407) is fixedly connected to the outer circumferential surface of the second hollow column (401). The end of the first bracket (407) away from the second hollow column (401) abuts against the top of the side wall of the material basket (7).

6. The feed precision preparation device for improving pellet forming rate according to claim 1, characterized in that, The connecting column (403) is fixedly connected to a limiting block (405) on one end side wall inside the second hollow column (401). The inner wall of the second hollow column (401) is provided with a guide groove for the limiting block (405) to slide along the axial direction. A spring (406) is fixedly connected between the upper surface of the limiting block (405) and the inner wall of the second hollow column (401).

7. The feed precision preparation device for improving pellet forming rate according to claim 6, characterized in that, The spring (406) is in a compressed state, and the side of the cutting blade (404) is elastically attached to the discharge end face of the first hollow column (302) under the elastic force of the spring (406).

8. The feed precision preparation device for improving pellet forming rate according to claim 1, characterized in that, The two ends of the heat dissipation pipe (504) pass through the side wall of the hollow frame (501) and communicate with the interior of the hollow frame (501). The hollow frame (501) is sleeved on the outside of the first hollow column (302) and the two are fixedly connected by bolts.

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