A puffing and granulating device for rainbow trout compound feed production

Abstract

The present application belongs to the technical field of puffed granulation equipment, and particularly relates to a puffed granulation equipment for rainbow trout compound feed production. The present application provides a puffed granulation equipment for rainbow trout compound feed production, which can be used in the following manner: 1. The hot air pipe unit can blow the rotary cutting knife unit, so that the feed particles can be relatively quickly solidified and shaped, and then quickly leave the knife body and drop out of the material, thereby avoiding a large amount of adhesion on the knife body; 2. The rotary cutting knife unit can adjust the distance between itself and the hole plate, so that the length adjustment mode of the feed particles is more.

Description

Technical Field

[0001] This invention belongs to the technical field of extrusion granulation equipment, and particularly relates to an extrusion granulation equipment for producing rainbow trout compound feed. Background Technology

[0002] Rainbow trout are a species of fish belonging to the genus Salmonella in the family Salmonidae. They have high economic value and are generally artificially bred in inland freshwater basins.

[0003] On the other hand, the main ingredients of rainbow trout compound feed include: chicken meal, fish meal, soybean meal, wheat bran, soybean oil, sunflower seed oil, and corn flour. Rainbow trout compound feed is generally extruded feed. Compared with non-extruded feed, the advantages of extruded feed include at least: better palatability, higher digestibility, and hygiene.

[0004] In the production process of the aforementioned rainbow trout extruded compound feed, extrusion pelleting equipment is required. This equipment mainly consists of a machine shell, a screw pusher, and a rotary cutter. After the feed raw materials undergo conditioning, they are first added to the extruder, then pressurized by the screw pusher and heated by the machine shell, continuously extruding the feed through openings in the shell. Finally, the feed is continuously cut by the rotary cutter to form rainbow trout extruded compound feed pellets of suitable length.

[0005] For example, Chinese utility model patent with authorization announcement number CN211677619U and authorization announcement date of October 16, 2020, discloses a piglet feed extrusion pelleting machine. Its structure includes a reaction chamber and an extrusion chamber. A dual-shaft motor is fixedly installed below the reaction chamber. A fixed rod is fixedly connected to the upper output shaft of the dual-shaft motor. A first bevel gear is fixedly connected to the other end of the fixed rod. A second bevel gear is installed above the first bevel gear. A stirring shaft is fixedly sleeved on the inner ring of the second bevel gear. A spiral blade is fixedly connected to the outer ring of the stirring shaft.

[0006] The extrusion granulator in this utility model patent has the following advantages: simple and novel structure, reduced production costs, reduced workload, controlled cutting of feed length, uniform feed forming length, and improved appearance quality of feed production.

[0007] However, in actual use, this extrusion granulator has at least two shortcomings, which are also the technical problems that this invention aims to solve: First, the machine lacks heating, drying and shaping functions. After the granules are cut, they cannot be quickly solidified and shaped. If the cut granules have high moisture content, they are easy to stick to the blades, which will affect the subsequent rotary cutting and granulation effect. Secondly, the number of ways to adjust the length of the rotary cut particles in this machine is relatively limited. Generally, it can only adjust the blade speed or change the material extrusion speed, and it is difficult to adjust the distance between the blade and the die.

[0008] Therefore, in summary, there is an urgent need for a new type of extrusion pelleting equipment with built-in pellet drying and shaping functions and adjustable blade-perforated plate distance, so as to produce extruded compound feed of various lengths suitable for rainbow trout at different growth stages. Summary of the Invention

[0009] This invention provides an extrusion pelleting device for rainbow trout compound feed production. By assembling a perforated plate, a spiral pusher, an arc-shaped top plate unit, an arc-shaped sliding plate unit, a rotary cutter unit, a protective plate unit, a hot air duct unit, and a rod-ring combination unit on the extruder cylinder, the following advantages are achieved: 1. The hot air duct unit effectively blows through the rotary cutter unit, ensuring that the feed pellets can solidify and shape relatively quickly, thus rapidly leaving the cutter body and falling out, preventing excessive adhesion to the cutter body; 2. The rotary cutter unit can adjust its distance from the perforated plate, allowing for a greater variety of feed pellet length adjustment methods.

[0010] The technical solution adopted by the present invention to solve the above problems is: an extrusion pelleting device for rainbow trout compound feed production, the structure of which includes an extruder cylinder, a perforated plate, and a spiral pusher, and further includes an arc-shaped top plate unit disposed on the extruder cylinder for dropping feed pellets downwards, an arc-shaped sliding plate unit engaged on the inner ring surface of the arc-shaped top plate unit, a rotary cutter unit disposed on the arc-shaped sliding plate unit, a guard plate unit disposed on the arc-shaped top plate unit and sleeved with the rotary cutter unit, a hot air pipe unit inserted into the arc-shaped top plate unit for blowing the rotary cutter unit or the guard plate unit, and a rod-ring combination unit disposed on the hot air pipe unit, inserted into the guard plate unit, and used to block and engage the arc-shaped sliding plate unit.

[0011] A further preferred technical solution is that the arc-shaped top plate unit includes an arc-shaped straight plate with a lower opening and a vertical cross-sectional shape of a fan ring, and an insertion hole disposed on the arc-shaped straight plate for installing the hot air duct unit.

[0012] A further preferred technical solution is that the arc-shaped sliding plate unit includes a fan-shaped annular block with its outer ring surface disposed on the inner ring surface of the arc-shaped straight plate, a motor connecting plate disposed on the fan-shaped annular block for mounting the rotary cutting blade unit, and a fixing hole disposed on the fan-shaped annular block for inserting the rod ring assembly unit.

[0013] A further preferred technical solution is that the arc-shaped sliding plate unit further includes circumferential limiting blocks respectively disposed at the two ends of the fan-shaped block and used to engage the lower side of the arc-shaped straight plate.

[0014] A further preferred technical solution is that the rotary cutting unit includes a drive motor mounted on the motor connection plate, a rotating shaft mounted on the drive motor and inserted into the guard plate unit, and a blade mounted on the rotating shaft for rotary cutting the feed pellets on the perforated plate.

[0015] A further preferred technical solution is that the rotary cutting blade unit also includes a square enlarged block disposed on the rotating shaft, which, when the drive motor is turned off, slides and impacts the guard plate unit to vibrate and dislodge feed particles stuck to the guard plate unit.

[0016] A further preferred technical solution is that the rotary cutting blade unit further includes a square-hole ring sleeved on the square enlarged block, and fastening bolts disposed on the square-hole ring and located on both sides of the square-hole ring along its length, respectively, as well as the blade.

[0017] A further preferred technical solution is that the guard plate unit includes an open-hole connecting plate disposed on the inner ring surface of the arc-shaped straight plate and sleeved with the rod ring assembly unit, and an open-hole circular plate disposed on the open-hole connecting plate and located between the drive motor and the blade.

[0018] A further preferred technical solution is that the hot air duct unit includes a vertical pipe disposed on the insertion hole and inserted into the rod ring assembly unit and used to connect the hot air blower, and an inclined rotating pipe disposed on the vertical pipe and used to blow the perforated circular plate on the blade or shaft.

[0019] A further preferred technical solution is that the rod ring assembly unit includes a fixed ring sleeved on the vertical tube, a transverse screw disposed on the fixed ring and inserted into the perforated connecting plate and the fixed hole, and two limiting nuts disposed on the transverse screw and respectively located on both sides of the fan-shaped block. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention.

[0021] Figure 2 This is a schematic diagram showing the position of the shaft positioning groove in this invention.

[0022] Figure 3 This is a schematic diagram showing the position of the rotary cutting blade unit in this invention.

[0023] Figure 4 This is a schematic diagram of the position and structure of the arc-shaped sliding plate unit in this invention.

[0024] Figure 5 This is a schematic diagram of the position and structure of the arc-shaped top plate unit in this invention.

[0025] Figure 6 This is a schematic diagram illustrating the usage of the hot air duct unit blowing guard plate unit in this invention.

[0026] Figure 7 This is a schematic diagram of the protective plate unit in this invention.

[0027] Figure 8 This is a schematic diagram showing the position and shape of the enlarged square block in this invention.

[0028] Figure 9 This is a schematic diagram showing the position and shape of the square hole ring in this invention.

[0029] Figure 10 This is a schematic diagram of the rod-ring assembly unit in this invention.

[0030] The meanings of the markings in the diagram are as follows: Extruder cylinder 11, perforated plate 12, screw pusher 13; Arc-shaped top plate unit 1, arc-shaped sliding plate unit 2, rotary cutting blade unit 3, guard plate unit 4, hot air pipe unit 5, rod ring assembly unit 6, shaft positioning groove 7; Curved straight plate 101, socket 102; Fan-shaped annular block 201, motor connecting plate 202, fixing hole 203, circumferential limiting block 204; Drive motor 301, rotating shaft 302, blade 303, square enlarged block 304, square hole ring 305, fastening bolt 306; Perforated connecting plate 401, perforated circular plate on shaft 402; Vertical tube 501, inclined rotating tube 502; Fixed ring 601, horizontal screw 602, limit nut 603. Detailed Implementation

[0031] The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

[0032] As attached Figure 1-10As shown, an extrusion pelleting device for producing rainbow trout compound feed includes an extruder cylinder 11, an orifice plate 12, and a spiral pusher 13. It also includes an arc-shaped top plate unit 1 mounted on the extruder cylinder 11 for downward dropping of feed pellets, an arc-shaped sliding plate unit 2 engaged on the inner ring surface of the arc-shaped top plate unit 1, a rotary cutter unit 3 mounted on the arc-shaped sliding plate unit 2, a protective plate unit 4 mounted on the arc-shaped top plate unit 1 and sleeved with the rotary cutter unit 3, a hot air duct unit 5 inserted into the arc-shaped top plate unit 1 for blowing away the rotary cutter unit 3 or the protective plate unit 4, and a rod-shaped ring assembly unit 6 mounted on the hot air duct unit 5, inserted into the protective plate unit 4, and used to block and engage the arc-shaped sliding plate unit 2.

[0033] In this embodiment, the adjustable feed pellet length function of the extrusion pelleting equipment is intended to provide rainbow trout of suitable feed pellet size at different growth stages. Generally, juvenile fish weighing less than 60g are suitable for feed pellets with a length of 2-3mm, rainbow trout weighing around 180g are suitable for feed pellets with a length of 4-6mm, and rainbow trout weighing more than 180g are suitable for feed pellets with a length of 7-8mm. As rainbow trout grow further, they can be fed meat-based feed directly.

[0034] The “expansion” part of the equipment corresponds to the extruder cylinder 11, the perforated plate 12, the spiral pusher 13, and various existing structures necessary for feed extrusion operation set on the extruder cylinder 11, such as heating structures and feed pipes.

[0035] The "granulation" part of the equipment corresponds to the arc-shaped top plate unit 1, arc-shaped sliding plate unit 2, rotary cutting knife unit 3, guard plate unit 4, hot air pipe unit 5, and rod ring assembly unit 6.

[0036] The general structural principle and advantages of the above-mentioned "granulation" part are as follows: First, the rotary cutting blade unit 3 is slid left and right to adjust the distance between the blade body and the perforated plate 12 so that the distance corresponds to the required particle length of the rainbow trout compound feed for that batch. Then, the arc-shaped sliding plate unit 2 is fixed on the arc-shaped sliding plate unit 2 to ensure that the distance that directly affects the length of the feed particles will not change spontaneously. Second, after the rotary cutting unit 3 and the above-mentioned "expansion" part are opened in sequence, basic extrusion granulation operation can be carried out, and rainbow trout compound feed pellets with the required diameter and length can be obtained below the arc-shaped top plate unit 1. Third, if the feed pellets are found to be too moist and partially stick to the rotary cutting unit 3 during the extrusion and granulation operation, the hot air pipe unit 5 can be turned on to blow hot air through the rotary cutting unit 3, which will greatly reduce the degree of sticking and improve the accuracy of feed pellet length. Fourth, during the extrusion and granulation operation, some feed particles that would normally be thrown onto the motor or thrown out are intercepted and blocked by the guard plate unit 4, ensuring that these feed particles can be easily recycled, avoiding waste, and also avoiding damage to the motor components inside the rotary cutter unit 3. Fifth, after the puffing and granulation operation is completed, the rotary cutting unit 3 is closed, and the hot air pipe unit 5 can rotate to blow hot air onto the protective plate unit 4, so that the wet particles stuck on it can be solidified and fall off for collection.

[0037] In addition, it should be noted that: 1. The method of adjusting the distance between the sliding blade body and the perforated plate 12 of the rotary cutting blade unit 3 to adjust the length of the feed particles does not conflict with other existing methods, such as the blade body rotation speed adjustment method, the extrusion speed adjustment method, etc.; 2. The overall process of feed particles that have not yet been fully cured first sticking to the guard plate unit 4 and then falling off after curing and hardening due to impact on the length of the feed particles can be ignored.

[0038] The arc-shaped top plate unit 1 includes an arc-shaped straight plate 101 with an opening at the bottom and a vertical cross-sectional shape of a fan ring, and an insertion hole 102 disposed on the arc-shaped straight plate 101 for installing the hot air duct unit 5.

[0039] In this embodiment, the structure of the arc-shaped straight plate 101 is a part of a circular tube with a through opening along its length at the bottom, and the opening is the outlet of the pellet feed.

[0040] Wherein, the arc-shaped straight plate 101 has a self-centered angle greater than 180°, and the insertion hole 102 is located at the highest point of the arc-shaped straight plate 101. Along the length of the arc-shaped straight plate 101, the structural components of this puffing and granulating equipment are as follows: The components include a perforated plate 12, a blade body, a hot air duct unit 5, a protective plate unit 4, and a motor that drives the blade body.

[0041] Furthermore, during the manufacturing of this extrusion granulation equipment, the extruder cylinder 11, the perforated plate 12, and the arc-shaped straight plate 101 can be integrally formed, and the shape of the extruder cylinder 11 is cylindrical.

[0042] The arc-shaped sliding plate unit 2 includes a fan-shaped annular block 201 with its outer ring surface disposed on the inner ring surface of the arc-shaped straight plate 101, a motor connecting plate 202 disposed on the fan-shaped annular block 201 and used for mounting the rotary cutting blade unit 3, and a fixing hole 203 disposed on the fan-shaped annular block 201 and used for inserting the rod ring assembly unit 6.

[0043] In this embodiment, the fan-shaped annular block 201, along with the rotary cutting blade unit 3, needs to be positioned close to or away from the perforated plate 12. Simultaneously, the fan-shaped annular block 201 itself needs to avoid rotation, otherwise the rotary cutting blade unit 3 may be damaged. This is because the center position of the fan-shaped annular block 201 may not coincide with the axis position or motor position of the rotary cutting blade unit 3. The aforementioned method to prevent rotation is by inserting the rod-shaped annular assembly unit 6 into the fixing hole 203.

[0044] The arc-shaped sliding plate unit 2 also includes circumferential limiting blocks 204 respectively disposed at the two ends of the fan-shaped block 201 and used to engage the lower side of the arc-shaped straight plate 101.

[0045] In this embodiment, the two circumferential limiting blocks 204 are respectively and always engaged with both sides of the lower opening of the arc-shaped straight plate 101, that is, the two lower side edges, in order to further prevent the fan-shaped block 201 from rotating.

[0046] In addition, for the purpose of reducing drag, ball bearings and / or lubricating oil can be provided as needed between the circumferential limiting block 204 and the lower side of the arc-shaped straight plate 101, between the fan-shaped annular block 201 and the inner annular surface of the arc-shaped straight plate 101, and between the fixing hole 203 and the rod annular combination unit 6.

[0047] The rotary cutting unit 3 includes a drive motor 301 mounted on the motor connection plate 202, a rotating shaft 302 mounted on the drive motor 301 and inserted into the guard plate unit 4, and a blade 303 mounted on the rotating shaft 302 for rotary cutting feed pellets on the perforated plate 12.

[0048] In this embodiment, a coupling is provided between the drive motor 301 and the rotating shaft 302, and the number of blades 303 is 2-6, which are evenly spaced in the circumferential direction of the rotating shaft 302.

[0049] Generally, the distance between the blade 303 and the perforated plate 12 is roughly proportional to the length of the feed pellets. On the other hand, the greater the extrusion speed of the feed raw material system at the perforated plate 12 and the smaller the rotation speed of the blade 303, the longer the feed pellets can be obtained, and vice versa.

[0050] The rotary cutter unit 3 also includes a square enlarged block 304 disposed on the rotating shaft 302, which, when the drive motor 301 is turned off, slides and impacts the guard plate unit 4 to vibrate and dislodge feed particles stuck to the guard plate unit 4.

[0051] In this embodiment, the square enlarged block 304 and the rotating shaft 302 are integrally formed, and the former has at least the following functions: After the extrusion and pelleting of a complete batch of rainbow trout compound feed is completed, the relatively damp feed particles stuck on the guard plate unit 4 can not only be solidified and fall off by the hot air blowing effect at the hot air pipe unit 5, but also fall off and be recycled by the backward sliding of the rotary cutter unit 3 and the direct impact of the square enlarged block 304. This is very simple and efficient.

[0052] When performing the above-mentioned appropriate impact operation, it is acceptable whether the blade 303 is removed from the square enlarged block 304, as long as the blade 303 does not collide with the hot air duct unit 5. For example, the blade 303 can be manually rotated to offset the hot air duct unit 5 around it before performing the above-mentioned appropriate impact operation.

[0053] The rotary cutting blade unit 3 also includes a square hole ring 305 sleeved on the square enlarged block 304, and fastening bolts 306 disposed on the square hole ring 305 and located on both sides of the square hole ring 305 along its length, respectively, as well as the blade 303.

[0054] In this embodiment, the second function of the square enlarged block 304 is to provide a circumferential forced limiting installation effect for the blade 303 when it is used in conjunction with the square hole ring 305.

[0055] Otherwise, without the square enlargement block 304, the square hole ring 305 can only be replaced with an ordinary ring, and the blade 303 is installed on the rotating shaft 302 by relying only on the clamping friction at the fastening bolt 306, which makes it relatively easy to slip and fall off.

[0056] On the other hand, along the length of the rotating shaft 302, one ring of the blade 303 and one ring of the fastening bolts 306 are arranged alternately on the left and right. Therefore, when adjusting the distance between the blade 303 and the orifice plate 12, the following can be done: The left and right positions of the blade 303, the square hole ring 305, and the fastening bolt 306 as a whole are interchanged as the "coarse adjustment" method for the above-mentioned distance adjustment. Moving the arc-shaped sliding plate unit 2 along with the entire rotary cutting blade unit 3 as the "fine-tuning" method for the aforementioned distance adjustment is highly efficient and practical.

[0057] The guard plate unit 4 includes an open-hole connecting plate 401 disposed on the inner ring surface of the arc-shaped straight plate 101 and sleeved on the rod ring assembly unit 6, and an open-hole circular plate 402 disposed on the open-hole connecting plate 401 and located between the drive motor 301 and the blade 303.

[0058] In this embodiment, the function of the opening structure on the perforated connecting plate 401 is to improve the installation stability of the rod ring assembly unit 6, while the function of the opening structure on the shaft perforated circular plate 402 is to allow the rotating shaft 302 to pass through without touching it.

[0059] The outer diameter of the perforated circular plate 402 on the shaft is smaller than the inner diameter of the fan-shaped annular block 201. The main function of the perforated circular plate 402 on the shaft is to prevent a large amount of feed particles from sticking to the drive motor 301, otherwise the motor would be easily damaged. That is, the object "protected" by the guard plate unit 4 is the drive motor 301.

[0060] On the other hand, the secondary function of the perforated circular plate 402 on the shaft is to prevent feed particles that would otherwise be thrown further away, thus facilitating the recovery of these feed particles.

[0061] Of course, the diameter of the central circular hole on the circular plate 402 with opening on the shaft is smaller than the side length of the square enlarged block 304.

[0062] The hot air duct unit 5 includes a vertical pipe 501 disposed on the insertion hole 102 and inserted into the rod ring assembly unit 6 and used to connect to the hot air blower, and an inclined rotating pipe 502 disposed on the vertical pipe 501 and used to blow the blade 303 or the perforated circular plate 402 on the shaft.

[0063] In this embodiment, the vertical tube 501 and the insertion hole 102 are prevented from vertically rising and falling, but are allowed to rotate circumferentially. This ensures that when the extrusion granulation equipment is producing rainbow trout compound feed, the inclined rotating tube 502 faces the side of the blade 303, thus preventing a large number of feed particles from sticking to the blade 303.

[0064] After the extrusion and granulation operation is completed, the inclined rotating tube 502 faces the perforated circular plate 402 on the shaft, allowing the relatively moist and sticky feed particles trapped on the latter to dry quickly, solidify, and fall off. If there are still feed particles sticking to the perforated circular plate 402 after the hot air blowing, the perforated circular plate 402 can be appropriately struck to ensure that all feed particles in this batch of rainbow trout compound feed can be collected, avoiding waste.

[0065] The rod ring assembly unit 6 includes a fixed ring 601 sleeved on the vertical tube 501, a transverse screw 602 disposed on the fixed ring 601 and inserted into the perforated connecting plate 401 and the fixing hole 203, and two limiting nuts 603 disposed on the transverse screw 602 and located on both sides of the fan-shaped block 201.

[0066] In this embodiment, the fixed ring 601 and the transverse screw 602 are completely fixed relative to the arc-shaped straight plate 101, and the guard plate unit 4, the hot air pipe unit 5 and the rod ring combination unit 6 are integrated together, thereby improving the structural strength of the entire puffing and granulation equipment.

[0067] Furthermore, after the fan-shaped annular block 201, along with the entire rotary cutting blade unit 3, has been adjusted to the required position, the two limiting nuts 603 clamp the fan-shaped annular block 201 from the left and right, which can ensure that the subsequent rotary cutting effect of the blade 303 has stable and unchanging position parameters.

[0068] Finally, at the center positions of both sides of the perforated plate 12, there is a shaft positioning groove 7 for inserting the spiral push rod 13 and the rotating shaft 302 respectively, so as to ensure that the rotating pushing operation and the rotary cutting operation are relatively stable.

[0069] At this time, as attached Figure 3 As shown, a small section of shaft is also provided on the left side of the square enlarged block 304 for inserting into the shaft positioning groove 7.

[0070] Finally, as attached Figure 2 As shown, the shaft positioning groove 7 on the right also has a second function, namely, to calibrate the maximum retraction and distance of the rotary cutting unit 3. When the rotating shaft 302 is about to disengage from the shaft positioning groove 7 on the right, the corresponding feed pellet length is the maximum length required for rainbow trout compound feed.

[0071] When the rotating shaft 302 is clearly disengaged from the right-side shaft positioning groove 7, the resulting feed pellet length, for example, is set to 10mm, which is completely unsuitable and unnecessary for rainbow trout during the pelleting stage. This enables the right-side shaft positioning groove 7 to have an early warning function for excessively long feed pellets.

[0072] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various modifications can be made without departing from the spirit of the present invention. These are non-inventive modifications and are protected by patent law as long as they fall within the scope of the claims of the present invention.

Claims

1. An extrusion pelleting device for producing rainbow trout compound feed, comprising an extruder cylinder (11), an orifice plate (12), and a spiral pusher (13), characterized in that: It also includes an arc-shaped top plate unit (1) disposed on the extruder cylinder (11) for dropping feed pellets downwards, an arc-shaped sliding plate unit (2) engaged with the inner ring surface of the arc-shaped top plate unit (1), a rotary cutter unit (3) disposed on the arc-shaped sliding plate unit (2), a guard plate unit (4) disposed on the arc-shaped top plate unit (1) and sleeved with the rotary cutter unit (3), a hot air pipe unit (5) inserted into the arc-shaped top plate unit (1) for blowing the rotary cutter unit (3) or the guard plate unit (4), and a rod-shaped ring assembly unit (6) disposed on the hot air pipe unit (5) and inserted into the guard plate unit (4) for blocking and engaging the arc-shaped sliding plate unit (2). The arc-shaped top plate unit (1) includes an arc-shaped straight plate (101) with an opening at the bottom and a vertical cross-sectional shape of a fan ring, and an insertion hole (102) provided on the arc-shaped straight plate (101) for installing the hot air duct unit (5). The arc-shaped sliding plate unit (2) includes a fan-shaped annular block (201) with its outer ring surface disposed on the inner ring surface of the arc-shaped straight plate (101), a motor connecting plate (202) disposed on the fan-shaped annular block (201) and used for mounting the rotary cutting blade unit (3), and a fixing hole (203) disposed on the fan-shaped annular block (201) and used for inserting the rod ring assembly unit (6). The rotary cutting unit (3) includes a drive motor (301) mounted on the motor connection plate (202), a rotating shaft (302) mounted on the drive motor (301) and inserted into the guard plate unit (4), and a blade (303) mounted on the rotating shaft (302) and used for rotary cutting feed pellets on the perforated plate (12). The rotary cutting blade unit (3) also includes a square enlarged block (304) disposed on the rotating shaft (302) and which, when the drive motor (301) is turned off, slides and impacts the guard plate unit (4) to vibrate and drop the feed particles stuck on the guard plate unit (4). The guard plate unit (4) includes a perforated connecting plate (401) disposed on the inner ring surface of the arc-shaped straight plate (101) and sleeved on the rod ring assembly unit (6), and a perforated circular plate (402) disposed on the perforated connecting plate (401) and located between the drive motor (301) and the blade (303). The hot air duct unit (5) includes a vertical pipe (501) disposed on the insertion hole (102) and inserted into the rod ring assembly unit (6) and used to connect the hot air blower, and an inclined rotating pipe (502) disposed on the vertical pipe (501) and used to blow the blade (303) or the perforated circular plate (402) on the shaft. After the puffing and granulation operation is completed, the rotary cutting knife unit (3) is closed, and the hot air pipe unit (5) rotates and blows hot air onto the guard plate unit (4), so that the feed particles stuck on the guard plate unit (4) can be solidified and fall off for collection.

2. The extrusion pelleting equipment for producing rainbow trout compound feed according to claim 1, characterized in that: The arc-shaped sliding plate unit (2) further includes circumferential limiting blocks (204) respectively disposed at the two ends of the fan-shaped block (201) and used to engage the lower side of the arc-shaped straight plate (101).

3. The extrusion pelleting equipment for producing rainbow trout compound feed according to claim 1, characterized in that: The rotary cutting blade unit (3) further includes a square hole ring (305) sleeved on the square enlarged block (304), and fastening bolts (306) disposed on the square hole ring (305) and located on both sides of the square hole ring (305) along the length direction of the blade (303).

4. The extrusion pelleting equipment for producing rainbow trout compound feed according to claim 1, characterized in that: The rod ring assembly unit (6) includes a fixed ring (601) sleeved on the vertical tube (501), a transverse screw (602) disposed on the fixed ring (601) and inserted into the perforated connecting plate (401) and the fixing hole (203), and two limiting nuts (603) disposed on the transverse screw (602) and located on both sides of the fan-shaped block (201).

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