A mixed feed granulation production line

Abstract

A mixed feed pelleting production line includes a mixer (19), an extrusion pellet mill (20) located below the mixer (19), and a drying and cooling conveyor (21) located at the discharge end of the extrusion pellet mill (20). The mixer (19) includes a mixer frame (1), a mixing barrel (2), and a feeding hopper (3). Both the upper and lower ends of the mixing barrel (2) are provided with conical parts (5). The advantages of this utility model are: each material falls freely in the mixing barrel and is dispersed and mixed sequentially by the upper and lower screen plates. During the falling collision process, the agglomerated materials can be quickly dispersed, improving the mixing efficiency and mixing quality. The material can quickly and evenly enter the extrusion cylinder through the dispersing roller in the feeding hopper. The heat generated after extrusion is collected by the heat collection guide tube and used to exchange heat with the air before being used to dry the pelleted feed, improving the heat energy utilization rate.

Description

Technical Field

[0001] This utility model relates to the technical field of mixed feed production equipment, specifically to a mixed feed pelleting production line. Background Technology

[0002] Most mixed feeds are made from energy sources such as corn, wheat, and barley to provide carbohydrates, protein sources such as soybean meal, fish meal, and rapeseed meal to supplement amino acids, crude fiber such as wheat bran and alfalfa meal to promote digestion, and other minerals and vitamins. During mixing, some of the existing raw materials are prone to clumping, resulting in uneven dispersion and affecting mixing quality and efficiency. During pelleting, the loose mixture of feeds can lead to uneven feeding in the extruder hopper, affecting the continuity of pelleting. The extruded material needs to be cut, and current cutting methods are mostly driven by independent power sources, resulting in complex structures. Because heating is required during feed pelleting to gelatinize starch and soften the material, the temperature of the pelleted feed typically reaches around 70-80℃. Most of this drying is done by letting it cool and dissipate heat, which is inefficient. Furthermore, the heat generated in the factory increases the indoor temperature, affecting the working environment and representing a significant waste of energy. Utility Model Content

[0003] The purpose of this utility model is to address the above-mentioned shortcomings by providing a mixed feed pelleting production line.

[0004] This utility model includes a mixer, an extrusion granulator located below the mixer, and a drying and cooling conveyor located at the discharge end of the extrusion granulator. The mixer includes a mixer frame, a mixing barrel, and a feeding hopper. Both the upper and lower ends of the mixing barrel are provided with conical parts, and discharge valves are provided on the conical parts. The mixing barrel is rotatably mounted on the mixer frame. A mixing motor for driving the mixing barrel to rotate is provided on the mixer frame. The feeding hopper is mounted on the mixer frame and located directly above the mixing barrel. Both ends of the mixing barrel are provided with sieve plates.

[0005] The extrusion granulator includes an extrusion base, an extrusion cylinder, an extrusion head, a dispersing roller, and an extrusion motor. The extrusion cylinder is fixed to the extrusion base, and the extrusion base is equipped with a heating component for heating the extrusion cylinder. The extrusion component is located inside the extrusion cylinder, and a feed hopper is located at the top of the extrusion cylinder. The dispersing roller is rotatably installed in the feed hopper. The extrusion motor is installed on the extrusion base and drives the extrusion component and the dispersing roller to rotate. The extrusion head is installed at the front end of the extrusion cylinder, and the extrusion component is equipped with a cutting blade that extends to the outside of the extrusion head. The extrusion base is equipped with a heat collection and guide cylinder that is fitted onto the extrusion head.

[0006] The top of the drying and cooling conveyor is provided with a drying hood, an exhaust pipe and a cooling hood in sequence from front to back. A set of air inlet pipes are arranged on the drying hood. The set of air inlet pipes are connected by a main air inlet pipe. A fan is provided at the air inlet end of the main air inlet pipe. An insulation jacket is provided on the main air inlet pipe. An air inlet pipe communicating with the heat collection guide tube and an exhaust pipe communicating with the exhaust pipe are respectively provided on the insulation jacket. A first exhaust channel communicating with the drying hood and a second exhaust channel communicating with the cooling hood are respectively provided on the exhaust pipe. The height of the first exhaust channel is higher than the height of the second exhaust channel.

[0007] The bottom of the feeding hopper is equipped with a discharge pipe, and a telescopic cylinder that can move up and down is provided on the discharge pipe. A locking screw that cooperates with the discharge pipe is provided on one side of the telescopic cylinder.

[0008] The conical part, the sieve plate, and both ends of the mixing barrel are equipped with matching connecting flanges. The conical part and the sieve plate are detachably installed on the mixing barrel by a set of screws. The sieve plate is a spherical structure that is concave towards the center.

[0009] The mixing drum has limit grooves at both the top and bottom of one side, and the mixing machine frame has limit rods that cooperate with the limit grooves.

[0010] The heating assembly includes a heating cylinder mounted on the extrusion cylinder, and a set of electric heating wires are provided inside the heating cylinder.

[0011] The extrusion assembly includes an extrusion shaft and a spiral extrusion blade. The spiral extrusion blade is fixed to the extrusion shaft. The extrusion head is provided with an extrusion shaft mounting hole. One end of the extrusion shaft passes through the extrusion shaft mounting hole and extends to the outside of the extrusion head. The cutting blade is mounted on the extrusion shaft and fits against the outside of the extrusion head. The dispersing roller has a ring array of multiple sets of dispersing tooth bars. The dispersing roller and the extrusion shaft are driven by a belt or gear.

[0012] The heat collection guide tube is installed at an angle on the extrusion base. The discharge end of the heat collection guide tube is equipped with a cover plate, and the bottom of the cover plate is equipped with a discharge port. The heat collection guide tube is connected to the drying hood through a chute.

[0013] A spiral guide plate is provided between the main air inlet pipe and the insulation jacket; a flat plate is provided on the inner side of both the feed end and the discharge end of the drying hood. The flat plate is hinged to the drying hood by a pin, and a set of uniform rake teeth is provided at the bottom of the flat plate.

[0014] An airflow guide plate is provided below the first exhaust channel located inside the exhaust pipe.

[0015] The exhaust pipe's outlet end extends into the exhaust cylinder, and an upward-opening exhaust elbow is provided on the exhaust pipe's outlet end.

[0016] The advantages of this invention are: Materials fall freely within the mixing drum and are sequentially dispersed and mixed by two screen plates. During the falling collision process, clumps of material are quickly broken up, improving mixing efficiency and quality. Materials enter the extrusion cylinder quickly and evenly through the dispersing roller in the feed hopper, facilitating uniform and continuous extrusion by the extrusion assembly. The cutting blade rotates synchronously with the extrusion assembly to cut the extruded material, resulting in a simple structure. The heat generated after extrusion is collected by the heat collection and guiding cylinder and exchanged with the air before being used to dry the pelleted feed, improving thermal energy utilization. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the mixing machine.

[0019] Figure 3 This is a schematic diagram of the internal structure of the mixing tank.

[0020] Figure 4 This is a schematic diagram of the telescopic cylinder installation structure.

[0021] Figure 5 This is a schematic diagram of an extrusion granulator.

[0022] Figure 6 This is a schematic diagram of the internal structure of an extrusion granulator.

[0023] Figure 7 This is a schematic diagram of the drying and cooling conveyor structure.

[0024] Figure 8 This is a schematic diagram of the internal structure of the drying and cooling conveyor.

[0025] Figure 9 This is a schematic diagram of a flat panel structure. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0028] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the utility model. Furthermore, if terms such as "first" or "second" appear in the description of this utility model, they are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] As shown in the attached drawings, the present invention includes a mixer 19, an extrusion granulator 20 located below the mixer 19, and a drying and cooling conveyor 21 located at the discharge end of the extrusion granulator 20. The mixer 19 includes a mixer frame 1, a mixing barrel 2, and a feeding hopper 3. Both the upper and lower ends of the mixing barrel 2 are provided with conical parts 5, and a discharge valve 6 is provided on the conical parts 5. The mixing barrel 2 is rotatably mounted on the mixer frame 1. The mixer frame 1 is provided with a mixing motor 7 that drives the mixing barrel 2 to rotate. The feeding hopper 3 is mounted on the mixer frame 1 and located directly above the mixing barrel 2. Both ends of the mixing barrel 2 are provided with sieve plates 8.

[0031] Each ingredient of the mixed feed is sequentially fed into the feeding hopper 3 and then into the mixing drum 2. The mixing motor 7 is then started, driving the mixing drum 2 to rotate. Each rotation is 180°, and then the rotation stops for 10-15 seconds, allowing the material that has rotated to the top of the mixing drum 2 to fall fully. During the fall, the material is dispersed by passing through two screen plates 8 in sequence. Clumps of material are also broken up during the collision and compression process, improving the mixing efficiency.

[0032] The extrusion granulator 20 includes an extrusion base 23, an extrusion cylinder 24, an extrusion head 25, a dispersing roller 26, and an extrusion motor 27. The extrusion cylinder 24 is fixed to the extrusion base 23. The extrusion base 23 is provided with a heating component 30 for heating the extrusion cylinder 24. An extrusion component 31 is provided inside the extrusion cylinder 24. A feed hopper 32 is provided at the top of the extrusion cylinder 24. The dispersing roller 26 is rotatably installed in the feed hopper 32. The extrusion motor 27 is installed on the extrusion base 23 and drives the extrusion component 31 and the dispersing roller 26 to rotate. The extrusion head 25 is installed at the front end of the extrusion cylinder 24. A cutting blade 33 is provided on the extrusion component 31 extending to the outside of the extrusion head 25. A heat collection and guiding cylinder 34 is provided on the extrusion base 23 and sleeved on the extrusion head 25.

[0033] The mixed material is fed into the feed hopper 32. The heating component 30 is used to heat the material in the extrusion cylinder 24 at a temperature of 100-120℃. The starch gelatinizes when heated, making the material soft. Then, the extrusion component 31 extrudes the material from the extrusion head 25 in strip form. The cutting blade 33 cuts the extrudate into granules during rotation. The dispersing roller 26 rotates in the feed hopper 32 to disperse the material and make it fall evenly into the extrusion cylinder 24, ensuring the continuity of extrusion.

[0034] The top of the drying and cooling conveyor 21 is provided with a drying hood 40, an exhaust pipe 41 and a cooling hood 42 in sequence from front to back. A set of air inlet pipes 45 are arranged on the drying hood 40. The set of air inlet pipes 45 are connected by an air inlet main pipe 46. A fan 47 is provided at the air inlet end of the air inlet main pipe 46. An insulation jacket 48 is provided on the air inlet main pipe 46. An air inlet pipe 49 communicating with the heat collection guide cylinder 34 and an exhaust pipe 50 communicating with the exhaust pipe 41 are respectively provided on the insulation jacket 48. A first exhaust channel 51 communicating with the drying hood 40 and a second exhaust channel 52 communicating with the cooling hood 42 are respectively provided on the exhaust pipe 41, and the height of the first exhaust channel 51 is higher than the height of the second exhaust channel 52.

[0035] The cut granules enter the drying and cooling conveyor 21 through the heat collection guide tube 34. The drying and cooling conveyor 21 is a belt conveyor. The granules move forward with the belt conveyor and pass through the drying hood 40, the exhaust pipe 41 and the cooling hood 42 in sequence. The granules are dried with warm air in the drying hood 40 and then enter the cooling hood 42. The cold air flows in the cooling hood 42 to carry away the heat of the granules and cool them down. One end of the exhaust pipe 41 extends out of the factory building to form a chimney effect to carry away the heat.

[0036] After the material is extruded and cut from the extruder head 25, the temperature can reach 70-80℃. The heat collection guide tube 34 is used to collect the heat emitted by the granules. Under the effect of the chimney, the airflow in the exhaust pipe 41 is drawn upward. A negative pressure is formed in the insulation jacket 48 connected to the exhaust pipe 41, thereby drawing the hot air in the heat collection guide tube 34 into the insulation jacket 48. When the hot air flows through, it heats the air inlet pipe 46. The fan 47 sends the outside cold air into the air inlet pipe 46, and after being heated in the air inlet pipe 46, it is blown out from each air inlet pipe 45 to dry the granules spread on the belt conveyor with warm air. The blown air then enters the exhaust pipe 41 and is discharged.

[0037] At the same time, due to the chimney effect, the cooling hood 42 is also under negative pressure. Cold air is drawn in from the discharge end of the cooling hood 42 and flows towards the feed end, and then enters the exhaust pipe 41 to be discharged. During the flow, the heat of the granules is carried away, and the granules are cooled down to below 40°C, which makes it easier to bag and pack.

[0038] Furthermore, the bottom of the feeding hopper 3 is provided with a discharge pipe 10, and a telescopic cylinder 11 that can move up and down is provided on the discharge pipe 10. A locking screw 12 that cooperates with the discharge pipe 10 is provided on one side of the telescopic cylinder 11.

[0039] During the mixing process, the telescopic cylinder 11 rises upward to provide clearance for the rotation of the mixing drum 2. When feeding, the telescopic cylinder 11 moves downward and inserts into one end of the discharge valve 6. The diameter of the telescopic cylinder 11 is smaller than the inner diameter of the discharge valve 6, which effectively prevents material overflow during feeding. In this case, the bottom end of the discharge pipe 10 is provided with a limiting flange, and the top inner side of the telescopic cylinder 11 is provided with a limiting boss that matches the limiting flange, which is used to limit the maximum downward movement distance of the telescopic cylinder 11. After feeding, the telescopic cylinder 11 is moved upward and locked by the locking screw 12. The locking screw 12 is screwed onto the telescopic cylinder 11, and one end of the locking screw 12 is provided with a handle for easy operation.

[0040] Furthermore, the conical part 5, the sieve plate 8, and both ends of the mixing tank 2 are equipped with matching connecting flanges. The conical part 5 and the sieve plate 8 are detachably installed on the mixing tank 2 by a set of screws. This facilitates the maintenance and replacement of the sieve plate 8, as well as the cleaning of the inside of the mixing tank 2.

[0041] Preferably, the sieve plate 8 is a spherical structure with a concave center. The upper and lower sieve plates 8 are installed symmetrically. When the material falls from the upper sieve plate 8, more of it will concentrate and fall into the concave center. After falling onto the lower sieve plate 8, it will spread out and fall in all directions. The mixing efficiency of each material can be improved during the process of the material tumbling and falling in the mixing tank 2.

[0042] The aperture of the sieve plate 8 is 30-50mm, which facilitates the smooth falling of materials. In this case, the volume of the conical part 5 is larger than the volume of the mixing barrel 2, so that after the mixing barrel 2 is overturned, the materials can fall fully into the lower conical part 5.

[0043] Furthermore, the mixing barrel 2 is provided with limiting grooves 15 at both the top and bottom ends on one side, and the mixing frame 1 is provided with limiting rods 16 that cooperate with the limiting grooves 15.

[0044] The cooperation between the limiting groove 15 and the limiting rod 16 makes it easy to keep the mixing barrel 2 vertical during the feeding process. The limiting rod 16 is movably inserted into the mixing frame 1. When it is necessary to fix it, the limiting rod 16 can be inserted into the limiting groove 15.

[0045] Preferably, the heating assembly 30 includes a heating cylinder mounted on the extrusion cylinder 24, and a set of electric heating wires are provided inside the heating cylinder.

[0046] Preferably, the extrusion assembly 31 includes an extrusion shaft 36 and a spiral extrusion blade 37. The spiral extrusion blade 37 is fixed to the extrusion shaft 36. The extrusion head 25 is provided with an extrusion shaft mounting hole. One end of the extrusion shaft 36 passes through the extrusion shaft mounting hole and extends to the outside of the extrusion head 25. The cutting blade 33 is mounted on the extrusion shaft 36 and fits against the outside of the extrusion head 25.

[0047] The cutting blade 33 includes a blade holder and a set of blades mounted in a ring on the blade holder. The cutting blade 33 is detachably mounted on the extrusion shaft 36 and rotates synchronously with the extrusion shaft 36. The number of blades can control the particle size of the granules. The more blades there are, the smaller the cutting distance between the front and rear blades, the faster the cutting frequency, and the smaller the granules. Conversely, the smaller the granules, the larger the granules. Different numbers of blades can be installed according to the required particle size.

[0048] Furthermore, the dispersing roller 26 has multiple sets of dispersing toothed rods arranged in a ring, and the dispersing roller 26 is connected to the extrusion shaft 36 by a belt or gear. The dispersing roller 26 and the extrusion shaft 36, which extend out of the feed hopper 32 and the extrusion cylinder 24, are respectively provided with matching pulleys or transmission gears, and the dispersing roller 26 is connected to the extrusion shaft 36 by a belt or gear.

[0049] Furthermore, the heat collection guide cylinder 34 is installed at an angle on the extrusion base 23. The discharge end of the heat collection guide cylinder 34 is provided with a cover plate 38, and the bottom of the cover plate 38 is provided with a discharge port. The heat collection guide cylinder 34 communicates with the inside of the drying hood 40 through a slide. The heat collection guide cylinder 34 is composed of two semi-cylinders hinged together, one half of which is movable and can be opened to facilitate the replacement and maintenance of the inner extrusion head 25.

[0050] Furthermore, a spiral guide plate 55 is provided between the air inlet main pipe 46 and the insulation jacket 48. The spiral guide plate 55 is used to guide the intake hot air to flow in a ring around the air inlet main pipe 46 from front to back, so as to heat the air inlet main pipe 46 evenly.

[0051] Furthermore, the inner sides of the inlet and outlet ends of the drying hood 40 are provided with flat plates 56, which are hinged to the drying hood 40 by pins, and a set of uniform rake teeth are provided at the bottom of the flat plate 56.

[0052] The flat plates 56 at both ends close the drying hood 40 to form a relatively enclosed space. After the hot air is blown in, it can be smoothly discharged into the first exhaust channel 51. The flat plate 56 is a movable plate. When the granules pass through, the flat plate 56 is pushed to one side. At the same time, the flat plate 56 can disperse and spread the granules under the reaction force.

[0053] Furthermore, an airflow guide plate 58 is provided below the first exhaust channel 51 located inside the exhaust pipe 41. The airflow guide plate 58 is inclined upward. After the airflow in the drying hood 40 enters the exhaust pipe 41, it flows upward, which can increase the negative pressure of the second exhaust channel 52 below the exhaust pipe 41 and increase the suction at the second exhaust channel 52, so that more cold air enters the cooling hood 42.

[0054] Furthermore, the exhaust pipe 50 extends into the exhaust cylinder 41, and an exhaust elbow 59 with an upward opening is provided on the exhaust pipe 50.

[0055] The opening of the exhaust elbow 59 faces upward, and the rising airflow inside the exhaust pipe 41 draws the airflow at the exhaust elbow 59 upward, preventing the airflow from flowing back into the exhaust pipe 50.

Claims

1. A mixed feed pelleting production line, characterized in that... The mixture includes a mixer (19), an extrusion granulator (20) located below the mixer (19), and a drying and cooling conveyor (21) located at the discharge end of the extrusion granulator (20). The mixer (19) includes a mixer frame (1), a mixing barrel (2), and a feeding hopper (3). The mixing barrel (2) has a conical part (5) at both the upper and lower ends, and a discharge valve (6) is provided on the conical part (5). The mixing barrel (2) is rotatably mounted on the mixer frame (1). The mixer frame (1) is provided with a mixing motor (7) that drives the mixing barrel (2) to rotate. The feeding hopper (3) is mounted on the mixer frame (1) and located directly above the mixing barrel (2). Both ends of the mixing barrel (2) are provided with sieve plates (8). The extrusion granulator (20) includes an extrusion base (23), an extrusion cylinder (24), an extrusion head (25), a dispersing roller (26), and an extrusion motor (27). The extrusion cylinder (24) is fixed to the extrusion base (23). The extrusion base (23) is provided with a heating component (30) for heating the extrusion cylinder (24). The extrusion cylinder (24) is provided with an extrusion component (31). The top of the extrusion cylinder (24) is provided with a feed hopper (32). The dispersing roller (26) is rotatably installed in the feed hopper (32). The extrusion motor (27) is installed on the extrusion base (23) and drives the extrusion component (31) and the dispersing roller (26) to rotate. The extrusion head (25) is installed at the front end of the extrusion cylinder (24). The extrusion component (31) is provided with a cutting blade (33) extending to the outside of the extrusion head (25). The extrusion base (23) is provided with a heat collection and guiding cylinder (34) sleeved on the extrusion head (25). The top of the drying and cooling conveyor (21) is provided with a drying hood (40), an exhaust pipe (41) and a cooling hood (42) in sequence from front to back. A set of air inlet pipes (45) are arranged on the drying hood (40). The set of air inlet pipes (45) are connected by an air inlet main pipe (46). A fan (47) is provided at the air inlet end of the air inlet main pipe (46). An insulation jacket (48) is provided on the air inlet jacket (48). An air inlet pipe (49) connected to the heat collection guide cylinder (34) and an exhaust pipe (50) connected to the exhaust pipe (41) are respectively provided on the insulation jacket (48). A first exhaust channel (51) connected to the drying hood (40) and a second exhaust channel (52) connected to the cooling hood (42) are respectively provided on the exhaust pipe (41). The height of the first exhaust channel (51) is higher than the height of the second exhaust channel (52).

2. The mixed feed pelleting production line according to claim 1, characterized in that... The bottom of the feeding hopper (3) is provided with a discharge pipe (10), and a telescopic cylinder (11) that can move up and down is provided on the discharge pipe (10). A locking screw (12) that cooperates with the discharge pipe (10) is provided on one side of the telescopic cylinder (11).

3. The mixed feed pelleting production line according to claim 1, characterized in that... The tapered part (5), the sieve plate (8) and the mixing barrel (2) are all provided with matching connecting flanges at both ends. The tapered part (5) and the sieve plate (8) are detachably installed on the mixing barrel (2) by a set of screws. The sieve plate (8) is a spherical structure that is concave towards the center.

4. The mixed feed pelleting production line according to claim 1, characterized in that... The mixing barrel (2) has a limiting groove (15) at both the top and bottom of one side, and a limiting rod (16) that cooperates with the limiting groove (15) is provided on the mixing frame (1).

5. A mixed feed pelleting production line according to claim 1, characterized in that... The heating assembly (30) includes a heating cylinder mounted on the extrusion cylinder (24), and a set of electric heating wires are provided inside the heating cylinder.

6. A mixed feed pelleting production line according to claim 1, characterized in that... The extrusion assembly (31) includes an extrusion shaft (36) and a spiral extrusion blade (37). The spiral extrusion blade (37) is fixed to the extrusion shaft (36). The extrusion head (25) is provided with an extrusion shaft mounting hole. One end of the extrusion shaft (36) passes through the extrusion shaft mounting hole and extends to the outside of the extrusion head (25). The cutting blade (33) is mounted on the extrusion shaft (36) and fits against the outside of the extrusion head (25). The dispersing roller (26) has multiple sets of dispersing toothed rods arranged in a ring. The dispersing roller (26) and the extrusion shaft (36) are driven by a belt or gear.

7. A mixed feed pelleting production line according to claim 1, characterized in that... The heat collection guide tube (34) is installed at an angle on the extrusion base (23). The discharge end of the heat collection guide tube (34) is provided with a cover plate (38), and the bottom of the cover plate (38) is provided with a discharge port. The heat collection guide tube (34) is connected to the drying hood (40) through a slide.

8. A mixed feed pelleting production line according to claim 1, characterized in that... A spiral guide plate (55) is provided between the air inlet pipe (46) and the insulation jacket (48); a flat plate (56) is provided on the inner side of the feed end and the discharge end of the drying hood (40). The flat plate (56) is hinged to the drying hood (40) by a pin. A set of uniform rake teeth is provided at the bottom of the flat plate (56).

9. A mixed feed pelleting production line according to claim 1, characterized in that... An airflow guide plate (58) is provided below the first exhaust channel (51) located inside the exhaust pipe (41).

10. A mixed feed pelleting production line according to claim 1, characterized in that... The exhaust pipe (50) extends into the exhaust cylinder (41) and an exhaust elbow (59) with an upward opening is provided on the exhaust pipe (50).

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