Puffing device for feed processing

Abstract

The invention relates to the technical field of feed processing, and discloses a feed processing puffing device which comprises a shell, a cavity is formed in the shell, and a screw rod is rotationally connected to the inner wall of the cavity in a penetrating mode; the extrusion assembly is used for mixing and extruding the dispersed feed; the cutter changing assembly is used for regularly changing the cutter; and the polishing assembly is used for polishing the cutter. Through the arrangement of the extrusion assembly, the mixing cylinder can mix feed just passing through a filter screen, the situation that the materials are loose is avoided, the forming rate and the forming quality of the feed can be improved, the expanded feed finished product is high in appearance quality and good in texture, and the breakage rate is reduced; through cooperation of the outer hole disc and the inner hole disc, the inner hole disc can achieve the machining effect of three different particle sizes, a worker can conduct adjustment according to the machining requirement, adjustment operation is convenient and fast, consumed time is short, and the influence on the production schedule is small.

Description

Technical Field

[0001] The present invention relates to the technical field of feed processing, and particularly relates to an extrusion device for feed processing. Background Art

[0002] In the modern feed processing field, the quality of feed plays a decisive role in the growth, health, and breeding efficiency of animals. As a key processing technology, feed extrusion has been increasingly widely concerned and applied. Feed extrusion is to process feed under high temperature and high pressure conditions by means of an extrusion device, so that the raw materials expand, loosen, and ripen. This process can not only effectively kill the germs and insects in the feed, improve the hygiene level of the feed, but also significantly improve the digestibility of the feed, optimize the taste, and is extremely beneficial to the healthy growth and feeding of animals. The quality and palatability of the feed after extrusion treatment are greatly improved, making it more convenient for livestock to eat.

[0003] However, in the prior art, the following problems exist: 1. In the prior art, when processing feed by extrusion, a screw extrusion device is usually used to mix and extrude the feed. A filter screen is usually installed inside the screw extrusion device near the outlet. After the feed passes through the filter screen, the feed that has been mixed into a whole forms multiple small strip-shaped bodies, making the connection between parts of the feed loose and difficult to aggregate into a whole in a short time. This may cause phenomena such as local fracture, breakage, or adhesion during the subsequent extrusion process of the feed, resulting in the extruded feed being prone to looseness and poor overall stability, thus affecting the product quality.

[0004] 2. In the prior art, when processing feed by extrusion, since products with different particle sizes need to be processed, when processing extruded feed with different particle size requirements, workers need to replace the extrusion heads with different apertures. The replacement operation is relatively troublesome. When replacing the extrusion head, production operations cannot be carried out temporarily, which has a certain impact on the production progress. Summary of the Invention

[0005] The purpose of the present invention is to provide an extrusion device for feed processing to solve the above problems and overcome the defects of the prior art, as described in detail below.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: An extrusion device for feed processing provided by the present invention includes a housing. A cavity is installed inside the housing. A hopper is connected to the cavity. A screw is rotatably connected through the inner wall of the cavity. A gearbox is arranged on the right side of the housing. The output end of the gearbox is connected to the right end of the screw. An extrusion pipe is connected to the left end of the cavity. A plurality of heaters are arranged on the outer wall of the cavity. A mounting shaft is rotatably connected through the left outer wall of the housing. Three cutting knives are installed on the mounting shaft. A filter screen is installed on the inner wall of the cavity; it further includes an extrusion assembly for extruding the dispersed feed after kneading; a tool changing assembly for regularly changing the cutting knives; a grinding assembly for grinding the cutting knives; the extrusion assembly includes a rotating shaft connected to the left end of the screw. The left end of the extrusion pipe is rotatably connected with an outer hole plate. The right side of the outer hole plate is connected to the left end of the rotating shaft. A kneading cylinder is connected to the inner wall of the extrusion pipe.

[0007] Preferably, the filter screen is located between the screw and the kneading cylinder. The inner wall of the filter screen is rotatably connected to the outer wall of the rotating shaft. Two grinding blocks are connected to the outer wall of the rotating shaft. Both of the two grinding blocks are in sliding contact with the right side of the filter screen.

[0008] Preferably, a plurality of through holes are arranged in a circumferential array on the kneading cylinder. The through holes of the kneading cylinder are of variable diameter. The inner wall of the extrusion pipe is of variable diameter.

[0009] Preferably, a plurality of first holes are arranged in a circumferential array on the outer hole plate. An inner hole plate is rotatably connected to the inner wall of the outer hole plate. The inner hole plate is located between the extrusion pipe and the outer hole plate. A plurality of second holes, a plurality of third holes and a plurality of fourth holes are arranged in a circumferential array on the inner hole plate. The plurality of third holes are respectively located on one side of the plurality of second holes. The plurality of fourth holes are respectively located on the other side of the plurality of second holes. A dial rod is connected to the outer wall of the inner hole plate. The dial rod is slidably connected through the inner wall of the outer hole plate. A part of the dial rod is located outside the outer hole plate.

[0010] Preferably, inner cylinders are respectively rotatably connected in the plurality of through holes of the kneading cylinder. A first gear is connected to the outer wall of the rotating shaft. A second gear is connected to the outer wall of the inner cylinder. All of the plurality of second gears are meshed with the first gear. A plurality of blades are connected to the inner wall of the inner cylinder.

[0011] Preferably, the tool changing assembly includes a mounting frame which is installed on the inner wall of the top of the housing. A reciprocating lead screw is rotatably connected between the bottom of the mounting frame and the outer wall of the left side of the housing. The left end of the reciprocating lead screw penetrates through the outer wall of the left side of the housing, and a fourth gear is connected to the left end of the reciprocating lead screw. A third gear is connected to the outer wall of the outer hole disc, and the third gear meshes with the fourth gear. A ball slider is slidably connected to the bottom of the mounting frame. A reciprocating thread groove is provided on the reciprocating lead screw, and the inner wall of the ball slider is slidably connected to the reciprocating thread groove of the reciprocating lead screw through balls. A roller is connected to the outer wall of the ball slider. The right end of the mounting shaft is connected to a driven shaft, and three first arc-shaped blocks and three second arc-shaped blocks are circumferentially arranged on the outer wall of the driven shaft. The first arc-shaped blocks and the second arc-shaped blocks are both located on the movement track of the roller.

[0012] Preferably, the grinding assembly includes a mounting seat which is installed at the left edge of the top surface of the housing. A portal frame is slidably installed on the mounting seat. The portal frame has two inner sides, and grinding blocks are respectively connected to the two inner sides of the portal frame through springs. A brush plate is connected to the rear side of the grinding block through a spring. The two grinding blocks and the two brush plates are both located on the movement track of the cutting tool.

[0013] Preferably, a groove rod is slidably installed between the bottom of the mounting frame and the inner wall of the left side of the housing. The groove rod penetrates through the inner wall of the left side of the housing, and the left end of the groove rod is connected to the portal frame. A corrugated groove is provided on the groove rod. A connecting rod is connected to the outer wall of the ball slider, and a sliding shaft is connected to the end of the connecting rod away from the ball slider. The sliding shaft is slidably connected to the corrugated groove of the groove rod.

[0014] Preferably, a liquid tank is installed on the top of the housing, and an air bag is installed on the inner wall of the left side of the housing. The air bag is located on the movement track of the ball slider. A trachea is connected between the air bag and the liquid tank. A liquid pipe is installed on the liquid tank, and two spray pipes are connected to the liquid pipe. Nozzles are provided at the ends of the spray pipes away from the liquid pipe. The nozzles of the two spray pipes are respectively located in front of the two grinding blocks.

[0015] The beneficial effects are as follows: 1. For this puffing device for feed processing, through the setting of the extrusion assembly, the kneading cylinder can knead the feed just passing through the filter screen, avoiding the loosening of the material, which helps to improve the forming rate and forming quality of the feed, making the appearance quality of the expanded feed product higher, the texture better, and reducing the breakage rate; through the cooperation of the outer hole disc and the inner hole disc, the inner hole disc can achieve three different particle size processing effects, and the staff can adjust according to the processing requirements. The adjustment operation is relatively convenient and time-consuming, and has little impact on the production progress.

[0016] 2. The puffing device for feed processing, through the setting of the tool changing component, enables the three cutting knives to be switched regularly, so that the three cutting knives take turns to perform cutting operations, avoiding the overheating of the same cutting knife during long-term use, which affects the cutting effect, and also avoiding shortening the replacement cycle due to the long-term wear of the cutting knife.

[0017] 3. The puffing device for feed processing, through the setting of the grinding component, enables the two grinding blocks to grind the cutting knife that is about to perform cutting operations, maintaining the sharpness of the cutting knife and avoiding the uneven surface of the feed cut due to the reduction of the sharpness of the cutting knife; through the setting of the two spray pipes, the two spray pipes can spray dry lubricant on the cutting knife that is about to perform cutting, thereby reducing the friction force on the surface of the cutting knife, further improving the cutting effect and reducing the adhesion of impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 is the external view schematic diagram of the present invention; Figure 2 is the schematic diagram of the housing structure of the present invention; Figure 3 is the schematic diagram of the screw structure of the present invention; Figure 4 is the schematic diagram of the extrusion pipe structure of the present invention; Figure 5 is the schematic diagram of the extrusion component structure of the present invention; Figure 6 is the schematic diagram of the kneading cylinder structure of the present invention; Figure 7 is the schematic diagram of the outer hole disk structure of the present invention; Figure 8 is the schematic diagram of the inner hole disk structure of the present invention; Figure 9 is the schematic diagram of the tool changing component structure of the present invention; Figure 10 is the schematic diagram of the ball slider structure of the present invention; Figure 11 is the schematic diagram of the driven shaft structure of the present invention; Figure 12 is the schematic diagram of the grinding component structure of the present invention; Figure 13 is the schematic diagram of the gantry structure of the present invention; Figure 14 It is a schematic structural diagram of the grinding block of the present invention.

[0020] The description of the reference numerals in the drawings is as follows: 1. Housing; 2. Cavity; 3. Hopper; 4. Gearbox; 5. Screw; 6. Extrusion pipe; 7. Extrusion assembly; 71. Rotating shaft; 72. Outer hole plate; 721. First hole; 73. Inner hole plate; 731. Second hole; 732. Third hole; 733. Fourth hole; 74. Poking rod; 75. Kneading cylinder; 76. Inner cylinder; 77. First gear; 78. Second gear; 79. Blade; 8. Tool changing assembly; 81. Third gear; 82. Reciprocating lead screw; 83. Fourth gear; 84. Mounting frame; 85. Ball slider; 86. Roller; 87. Driven shaft; 88. First arc-shaped block; 89. Second arc-shaped block; 9. Grinding assembly; 91. Mounting seat; 92. Gantry frame; 93. Grinding block; 94. Grooved rod; 95. Connecting rod; 96. Sliding shaft; 97. Brush plate; 98. Airbag; 99. Liquid tank; 910. Air pipe; 911. Liquid pipe; 912. Nozzle; 10. Mounting shaft; 11. Cutter; 12. Filter screen; 13. Grinding block. Detailed implementation manners

[0021] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other implementation manners obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope protected by the present invention.

[0022] Embodiment 1 Please refer to Figure 1 - Figure 8, An extrusion device for feed processing, including a housing 1. Inside the housing 1, a cavity 2 is installed. A hopper 3 is connected to the cavity 2. A screw 5 is rotatably connected through the inner wall of the cavity 2. A gearbox 4 is arranged on the right side of the housing 1. The output end of the gearbox 4 is connected to the right end of the screw 5. The left end of the cavity 2 is connected to an extrusion pipe 6. A plurality of heaters are arranged on the outer wall of the cavity 2. An installation shaft 10 is rotatably connected through the left outer wall of the housing 1. Three cutting knives 11 are installed on the installation shaft 10. A filter screen 12 is installed on the inner wall of the cavity 2. Feed enters the cavity 2 from the hopper 3. The gearbox 4 drives the screw 5 to rotate. The screw 5 mixes the feed in the cavity 2 through rotation and conveys it to the left. After the heaters outside the cavity 2 are turned on, they can heat the cavity 2, thereby heating the feed in the cavity 2. The feed in the cavity 2 enters the extrusion pipe 6 after passing through the filtration of the filter screen 12; it also includes an extrusion assembly 7 for extruding the dispersed feed after kneading; the extrusion assembly 7 includes a rotating shaft 71. The rotating shaft 71 is connected to the left end of the screw 5. The left end of the extrusion pipe 6 is rotatably connected to an outer hole plate 72. The right side of the outer hole plate 72 is connected to the left end of the rotating shaft 71. While the outer hole plate 72 extrudes the feed, it drives the feed to rotate, so that the rotating feed contacts the cutting knives 11, causing the cutting knives 11 to cut the feed. When the feed is cut, it contacts the air and expands to form expanded feed. Conventional rotary cutters are prone to driving the cut feed to splash during rotary cutting. Through the cooperation of the outer hole plate 72 and the cutting knives 11, the outer hole plate 72 drives the feed to rotate and contact the cutting knives 11 to achieve cutting, enabling the cutting knives 11 to use the friction between them and the feed to offset most of the inertia of the feed, so that the cut feed falls directly, avoiding the situation of feed splashing caused by conventional rotary cutters during cutting; an inner kneading cylinder 75 is connected to the inner wall of the extrusion pipe 6. A plurality of through holes are arranged in a circumferential array on the inner kneading cylinder 75. The through holes of the inner kneading cylinder 75 are of variable diameter. The inner diameter of the left side of the variable diameter part of the through hole is smaller than that of the right side. The inner wall of the extrusion pipe 6 is of variable diameter. The variable diameter part of the extrusion pipe 6 gradually shrinks towards the left. A plurality of inner cylinders 76 are rotatably connected in the respective through holes of the inner kneading cylinder 75. A first gear 77 is connected to the outer wall of the rotating shaft 71. A second gear 78 is connected to the outer wall of the inner cylinder 76. A plurality of second gears 78 are all meshed with the first gear 77. A plurality of blades 79 are connected to the inner wall of the inner cylinder 76. The loose feed after passing through the filter screen 12 is first kneaded by the blades 79 in the plurality of inner cylinders 76, and then is extruded through the inner kneading cylinder 75 into a plurality of larger wholes. Finally, they are mutually extruded at the variable diameter part of the extrusion pipe 6 to form a whole, improving the overall stability of the feed after subsequent expansion and forming, and avoiding the situation of being loose and fragile. Through the setting of the extrusion assembly 7, the inner kneading cylinder 75 can knead the feed just passing through the filter screen 12, avoiding the situation of the material being loose, which helps to improve the forming rate and forming quality of the feed, making the appearance quality of the expanded feed product higher, the texture better, and reducing the breakage rate.

[0023] Furthermore, the filter 12 is located between the screw 5 and the mixing cylinder 75, and the inner wall of the filter 12 is rotatably connected to the outer wall of the rotating shaft 71. The outer wall of the rotating shaft 71 is connected to two grinding blocks 13. The two grinding blocks 13 are in sliding contact with the right side of the filter 12. When the rotating shaft 71 rotates, it drives the two grinding blocks 13 to rotate. The two grinding blocks 13 crush the larger particles on the right side of the filter 12 that cannot pass through the filter 12 to avoid clogging of the filter 12.

[0024] Furthermore, a plurality of No. 1 holes 721 are arranged in a circular array on the outer hole disk 72, and an inner hole disk 73 is rotatably connected to the inner wall of the outer hole disk 72. The inner hole disk 73 is located between the extrusion tube 6 and the outer hole disk 72, and a plurality of No. 2 holes 731, a plurality of No. 3 holes 732 and a plurality of No. 4 holes 733 are arranged in a circular array on the inner hole disk 73. The plurality of No. 3 holes 732 are respectively located on one side of the plurality of No. 2 holes 731, and the plurality of No. 4 holes 733 are respectively located on the other side of the plurality of No. 2 holes 731. The inner diameter of the No. 1 hole 721 is equal to the No. 2 hole 731, the inner diameter of the No. 2 hole 731 is larger than the No. 3 hole 732, and the inner diameter of the No. 3 hole 732 is larger than the No. 4 hole 733. The outer wall of the inner hole disk 73 is connected to a lever 74, and the lever 74 is slidably connected to the inner wall of the outer hole disk 72. A portion of the lever 74 is located outside the outer hole disk 72, and switching processing is required. When the particle size is adjusted, the lever 74 is toggled, and the lever 74 drives the inner hole disk 73 to rotate, so that the multiple No. 3 holes 732 are respectively overlapped with the multiple No. 1 holes 721, and the feed is first extruded through the No. 3 hole 732 with a smaller inner diameter and then passes through the No. 1 hole 721, so that the diameter of the extruded feed is reduced, and the particle size after puffing is reduced accordingly. Similarly, after the staff uses the lever 74 to make the multiple No. 4 holes 733 overlap with the No. 1 hole 721, they can process feed with a smaller particle size, so that the staff can flexibly adjust the angle of the inner hole disk 73 according to the processing requirements of different particle sizes to realize the processing of feeds with different particle sizes. Through the cooperation of the outer hole disk 72 and the inner hole disk 73, the inner hole disk 73 can achieve three processing effects of different particle sizes, and the staff can make adjustments according to the processing requirements. The adjustment operation is relatively convenient and time-consuming, and has little impact on the production progress.

[0025] Also, see Figure 4 , Figure 9 - Figure 11, a tool changing assembly 8 for timing the replacement of the cutting tool 11; the tool changing assembly 8 includes a mounting bracket 84 which is mounted on the inner wall of the top of the housing 1. There is a reciprocating lead screw 82 rotatably connected between the bottom of the mounting bracket 84 and the outer wall of the left side of the housing 1. The left end of the reciprocating lead screw 82 penetrates through the outer wall of the left side of the housing 1, and the left end of the reciprocating lead screw 82 is connected with a fourth gear 83. A third gear 81 is connected to the outer wall of the outer hole disk 72, and the third gear 81 meshes with the fourth gear 83. A ball slider 85 is slidably connected to the bottom of the mounting bracket 84. A reciprocating thread groove is provided on the reciprocating lead screw 82, and the inner wall of the ball slider 85 is slidably connected to the reciprocating thread groove of the reciprocating lead screw 82 through balls. When the reciprocating lead screw 82 rotates, it can drive the ball slider 85 to slide left and right reciprocally at the bottom of the mounting bracket 84 through the cooperation of the reciprocating thread groove and the balls. A roller 86 is connected to the outer wall of the ball slider 85, and the roller 86 moves synchronously when the ball slider 85 moves. The right end of the mounting shaft 10 is connected with a driven shaft 87. Three first arc-shaped blocks 88 and three second arc-shaped blocks 89 are arranged in a circumferential array on the outer wall of the driven shaft 87. Both the first arc-shaped blocks 88 and the second arc-shaped blocks 89 are located on the movement track of the roller 86. Each reciprocating movement of the roller 86 can drive the driven shaft 87 to rotate 120 degrees through one of the first arc-shaped blocks 88 and one of the second arc-shaped blocks 89. The angle of rotation of the driven shaft 87 when the roller 86 contacts the first arc-shaped block 88 is greater than the angle of rotation of the driven shaft 87 when the roller 86 contacts the second arc-shaped block 89. When the driven shaft 87 rotates, it drives the three cutting tools 11 to rotate through the mounting shaft 10, so that the three cutting tools 11 take turns to move to the left side of the outer hole disk 72 for cutting operations, achieving the effect of timing the replacement of the cutting tool 11; through the setting of the tool changing assembly 8, the three cutting tools 11 can be timed to be replaced, so that the three cutting tools 11 take turns to perform cutting operations, avoiding the situation of overheating due to the long-term use of the same cutting tool 11, which affects the cutting effect, and at the same time avoiding shortening the replacement cycle due to the long-term wear of the cutting tool 11.

[0026] It should be noted that please refer to Figure 4 , Figure 12 - Figure 14, a grinding assembly 9 for grinding the cutting knife 11; the grinding assembly 9 includes a mounting base 91, the mounting base 91 is installed at the left edge of the top surface of the housing 1, a gantry 92 is slidably installed on the mounting base 91, the gantry 92 has two inner sides, and grinding blocks 93 are respectively connected to the two inner sides of the gantry 92 through springs. A brush plate 97 is connected to the rear side of the grinding block 93 through a spring. The two grinding blocks 93 and the two brush plates 97 are all located on the movement track of the cutting knife 11. During the process of the cutting knife 11 rotating from the rear to the uppermost position, the cutting knife 11 first contacts the two brush plates 97, so that the brush plates 97 remove the impurities attached to the surface of the cutting knife 11. Subsequently, the cutting knife 11 moves between the two grinding blocks 93, and the two grinding blocks 93 use the elastic force of the spring to maintain the pressure on both sides of the cutting knife 11; a groove rod 94 is slidably installed between the bottom of the mounting frame 84 and the left inner wall of the housing 1. The groove rod 94 penetrates through the left inner wall of the housing 1, the left end of the groove rod 94 is connected to the gantry 92, a corrugated groove is provided on the groove rod 94, a connecting rod 95 is connected to the outer wall of the ball slider 85, one end of the connecting rod 95 away from the ball slider 85 is connected to a sliding shaft 96, and the sliding shaft 96 is slidably connected to the corrugated groove of the groove rod 94. When the sliding shaft 96 moves, it drives the groove rod 94 to move up and down reciprocally through the corrugated groove, so that the groove rod 94 drives the two grinding blocks 93 to move up and down reciprocally through the gantry 92, and the two grinding blocks 93 grind the cutting knife 11 through the up and down reciprocating movement, thereby maintaining the sharpness of the cutting knife 11. Through the setting of the grinding assembly 9, the two grinding blocks 93 can grind the cutting knife 11 that is about to perform cutting operations, maintain the sharpness of the cutting knife 11, and avoid the surface of the cut feed being uneven due to the reduction of the sharpness of the cutting knife 11.

[0027] It should be noted that a liquid tank 99 is installed at the top of the housing 1, and a dry lubricant is contained in the liquid tank 99. An airbag 98 is installed on the left inner wall of the housing 1. The airbag 98 is located on the movement track of the ball slider 85. When the ball slider 85 is about to move to the leftmost side, it contacts and presses the airbag 98. A trachea 910 is connected between the airbag 98 and the liquid tank 99. A liquid pipe 911 is installed on the liquid tank 99, and two spray pipes 912 are connected to the liquid pipe 911. The end of the spray pipe 912 far from the liquid pipe 911 is provided with a nozzle. The nozzles of the two spray pipes 912 are respectively located in front of the two grinding blocks 93. When the cutter 11 passes between the nozzles of the two spray pipes 912, the two spray pipes 912 respectively spray the dry lubricant on both sides of the cutter 11 through the two nozzles, so that a layer of dry lubricant adheres to the surface of the cutter 11. The dry lubricant can form an isolation layer on the surface of the cutter 11, reducing the probability of impurities adhering to the surface during the cutting operation, and avoiding a large amount of impurities adhering to the surface of the cutter 11 after long-term use, which affects the cutting operation. Through the setting of the two spray pipes 912, the two spray pipes 912 can spray the dry lubricant on the cutter 11 that is about to perform cutting, thereby reducing the friction force on the surface of the cutter 11, further improving the cutting effect, and reducing the adhesion of impurities.

[0028] With the above structure, the working principle of this case is as follows: The feed enters the cavity 2 from the hopper 3. The gearbox 4 drives the screw 5 to rotate. The screw 5 mixes the feed in the cavity 2 through rotation and conveys it to the left. After the heater outside the cavity 2 is turned on, it can heat the cavity 2, thereby heating the feed in the cavity 2. The feed in the cavity 2 enters the extrusion tube 6 after being filtered by the filter screen 12. When the screw 5 rotates, it drives the rotating shaft 71 to rotate. When the rotating shaft 71 rotates, it drives the two grinding blocks 13 to rotate. The two grinding blocks 13 crush the larger particles that fail to pass through the filter screen 12 on the right side of the filter screen 12 to prevent the filter screen 12 from being blocked; when the rotating shaft 71 rotates, it drives the outer hole plate 72 to rotate, and the outer hole plate 72 drives the inner hole plate 73 to rotate synchronously. A plurality of second holes 731 on the inner hole plate 73 coincide with a plurality of first holes 721 on the outer hole plate 72 respectively. The feed in the extrusion tube 6 is extruded through the second holes 731 and the first holes 721. Since the outer hole plate 72 and the inner hole plate 73 rotate continuously, the extruded feed and the rotating feed come into contact with the cutter 11, causing the cutter 11 to cut the feed. When the feed is cut, it comes into contact with the air and expands to form expanded feed. Conventional rotary cutters are prone to driving the cut feed to splash during rotary cutting. Through the cooperation of the outer hole plate 72 and the cutter 11, the outer hole plate 72 drives the feed to rotate and come into contact with the cutter 11 to achieve cutting, enabling the cutter 11 to use its friction with the feed to offset most of the inertia of the feed, causing the cut feed to fall directly, avoiding the situation of feed splashing caused by conventional rotary cutters during cutting; the inner diameter of the first hole 721 is equal to that of the second hole 731, the inner diameter of the second hole 731 is greater than that of the third hole 732, and the inner diameter of the third hole 732 is greater than that of the fourth hole 733. When it is necessary to switch the processing particle size, the lever 74 is toggled. The lever 74 drives the inner hole plate 73 to rotate, causing a plurality of third holes 732 to coincide with a plurality of first holes 721 respectively. At this time, the second holes 731 and the fourth holes 733 cannot discharge materials due to the blockage of the outer hole plate 72, causing the feed to be first extruded through the third holes 732 with a smaller inner diameter and then pass through the first holes 721, thereby reducing the diameter of the extruded feed and the particle size of the expanded feed accordingly. Similarly, after the staff makes a plurality of fourth holes 733 coincide with the first holes 721 through the lever 74, feed with a smaller particle size can be processed, enabling the staff to flexibly adjust the angle of the inner hole plate 73 according to different particle size processing requirements to achieve the processing of feeds with different particle sizes;The filtered feed enters into multiple through-holes of the blending cylinder 75, and the feed entering the through-holes enters the inner cylinder 76. When the rotating shaft 71 rotates, it drives the first gear 77 to rotate. The first gear 77 drives multiple inner cylinders 76 to rotate through multiple second gears 78. The blades 79 inside the inner cylinder 76 rotate synchronously with the inner cylinder 76. The blades 79 inside the inner cylinder 76 can blend the flowing feed through rotation, blending the loose feed into a whole. The variable-diameter part of the through-hole in the blending cylinder 75 is to the left of the inner cylinder 76. When the feed after being blended by the inner cylinder 76 passes through the variable-diameter part of the through-hole, since the inner diameter on the left side of the variable-diameter part of the through-hole is smaller than that on the right side, the feed is squeezed when flowing to the left, further promoting the blending effect. The feed flowing out through multiple through-holes after being squeezed moves to the variable-diameter part of the extrusion pipe 6. The variable-diameter part of the extrusion pipe 6 gradually narrows towards the left, so that the feed flowing out of multiple through-holes is squeezed again. Through the above steps, the loose feed after passing through the filter screen 12 first undergoes the blending of the blades 79 inside multiple inner cylinders 76, and then is squeezed through the blending cylinder 75 into multiple larger wholes. Finally, they are mutually squeezed at the variable-diameter part of the extrusion pipe 6 to form a whole, improving the overall stability of the feed after subsequent puffing and forming, and avoiding the situation of being loose and fragile; through the setting of the extrusion assembly 7, the blending cylinder 75 can blend the feed just passing through the filter screen 12, avoiding the situation of the material being loose, helping to improve the forming rate and forming quality of the feed, making the appearance quality of the expanded feed product higher, the texture better, and reducing the breakage rate; through the cooperation of the outer hole disk 72 and the inner hole disk 73, the inner hole disk 73 can achieve the processing effects of three different particle sizes, and the staff can adjust according to the processing requirements. The adjustment operation is relatively convenient and takes less time, having little impact on the production progress.

[0029] When the outer hole disk 72 rotates, it drives the fourth gear 83 to rotate through the third gear 81. The fourth gear 83 drives the reciprocating lead screw 82 to rotate. When the reciprocating lead screw 82 rotates, it can drive the ball slider 85 to slide left and right reciprocally at the bottom of the mounting bracket 84 through the cooperation of the reciprocating thread groove and the ball. When the ball slider 85 moves, it drives the roller 86 to move synchronously. When the roller 86 moves leftward and is about to reach the leftmost position, the roller 86 contacts the arc surface of one of the first arc surface blocks 88, causing the roller 86 to drive the driven shaft 87 to rotate along the arc surface of the first arc surface block 88. When the roller 86 moves leftward in place, the roller 86 abuts between the two first arc surface blocks 88, and the driven shaft 87 stops rotating. Subsequently, the roller 86 moves rightward, and the roller 86 contacts one of the second arc surface blocks 89, causing the roller 86 to drive the driven shaft 87 to rotate a certain angle again through the arc surface of the second arc surface block 89 during the rightward movement. Subsequently, the roller 86 disengages from the contact with the second arc surface block 89. When the roller 86 moves leftward next time, it contacts the next first arc surface block 88. Each reciprocating movement of the roller 86 can drive the driven shaft 87 to rotate 120 degrees through one of the first arc surface blocks 88 and one of the second arc surface blocks 89. The angle of rotation of the driven shaft 87 when the roller 86 contacts the first arc surface block 88 is greater than the angle of rotation of the driven shaft 87 when the roller 86 contacts the second arc surface block 89. When the driven shaft 87 rotates, it drives the three cutting knives 11 to rotate through the mounting shaft 10, so that the three cutting knives 11 take turns to move to the left side of the outer hole disk 72 for cutting operations, achieving the effect of timing the switching of the cutting knives 11; through the setting of the tool changing assembly 8, the three cutting knives 11 can be switched regularly, enabling the three cutting knives 11 to take turns to perform cutting operations, avoiding the situation of overheating when the same cutting knife 11 is used for a long time, thus affecting the cutting effect, and at the same time avoiding shortening the replacement cycle due to the long-term wear of the cutting knife 11.

[0030] During the process of the cutting knife 11 rotating from the rear to the uppermost position, the cutting knife 11 first contacts the two brush plates 97, so that the brush plates 97 remove the impurities attached to the surface of the cutting knife 11. Subsequently, the cutting knife 11 moves between the two grinding blocks 93. The two grinding blocks 93 use the elastic force of the spring to maintain the pressure on both sides of the cutting knife 11. When the ball screw slider 85 moves, it drives the sliding shaft 96 to move synchronously through the connecting rod 95. When the sliding shaft 96 moves, it slides in the waveform groove of the groove rod 94, so that the sliding shaft 96 drives the groove rod 94 to move up and down reciprocally through the waveform groove, so that the groove rod 94 drives the gantry 92 to slide up and down reciprocally on the mounting seat 91. The gantry 92 drives the two grinding blocks 93 to move up and down reciprocally through the spring, so that the two grinding blocks 93 grind the cutting knife 11 through the up and down reciprocating movement, thereby maintaining the sharpness of the cutting knife 11; The liquid tank 99 is filled with dry lubricant. When the ball screw slider 85 is about to move to the leftmost side, it contacts and squeezes the airbag 98. At this time, the three cutting knives 11 start to rotate. The cutting knife 11 that has just been ground is about to move to the left side of the outer hole plate 72 for cutting operation. During this process, the airbag 98 adds air to the liquid tank 99 through the air pipe 910. The liquid tank 99 transports the dry lubricant to the two spray pipes 912 through the liquid pipe 911. At this time, the cutting knife 11 passes between the nozzles of the two spray pipes 912. The two spray pipes 912 spray the dry lubricant on both sides of the cutting knife 11 through the two nozzles respectively, so that a layer of dry lubricant adheres to the surface of the cutting knife 11. The dry lubricant can form an isolation layer on the surface of the cutting knife 11, reducing the probability of impurities adhering to the surface during the cutting operation, and preventing a large amount of impurities from adhering to the surface of the cutting knife 11 after long-term use, which affects the cutting operation; Through the setting of the grinding assembly 9, the two grinding blocks 93 can grind the cutting knife 11 that is about to perform the cutting operation, maintaining the sharpness of the cutting knife 11, and preventing the surface of the cut feed from being uneven due to the reduction of the sharpness of the cutting knife 11; Through the setting of the two spray pipes 912, the two spray pipes 912 can spray the dry lubricant on the cutting knife 11 that is about to perform the cutting, thereby reducing the friction force on the surface of the cutting knife 11, further improving the cutting effect, and reducing the adhesion of impurities.

[0031] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claimed rights.

Claims

1. An extrusion device for feed processing, comprising a housing (1), characterized in that: A cavity (2) is installed inside the housing (1). A hopper (3) is connected to the cavity (2). A screw rod (5) is rotatably connected through the inner wall of the cavity (2). A gearbox (4) is arranged on the right side of the housing (1). The output end of the gearbox (4) is connected to the right end of the screw rod (5). An extrusion pipe (6) is connected to the left end of the cavity (2). A plurality of heaters are arranged on the outer wall of the cavity (2). An installation shaft (10) is rotatably connected through the left outer wall of the housing (1). Three cutter blades (11) are installed on the installation shaft (10). A filter screen (12) is installed on the inner wall of the cavity (2); An extrusion assembly (7) is further included, which is used for extruding the dispersed feed after kneading; A cutter changing assembly (8), which is used for regularly changing the cutter blades (11); A grinding assembly (9), which is used for grinding the cutter blades (11); The extrusion assembly (7) includes a rotating shaft (71). The rotating shaft (71) is connected to the left end of the screw rod (5). The left end of the extrusion pipe (6) is rotatably connected with an outer hole disc (72). The right side of the outer hole disc (72) is connected to the left end of the rotating shaft (71). A kneading cylinder (75) is connected to the inner wall of the extrusion pipe (6).

2. The puffing device for feed processing according to claim 1, wherein: The filter screen (12) is located between the screw rod (5) and the kneading cylinder (75). The inner wall of the filter screen (12) is rotatably connected to the outer wall of the rotating shaft (71). Two grinding blocks (13) are connected to the outer wall of the rotating shaft (71). Both of the two grinding blocks (13) are in sliding contact with the right side of the filter screen (12).

3. The puffing device for feed processing according to claim 2, wherein: A plurality of through holes are arranged in a circumferential array on the kneading cylinder (75). The through holes of the kneading cylinder (75) are of variable diameter. The inner wall of the extrusion pipe (6) is of variable diameter.

4. An extrusion device for feed processing according to claim 3, characterized in that: A plurality of first holes (721) are arranged in a circumferential array on the outer hole disc (72). An inner hole disc (73) is rotatably connected to the inner wall of the outer hole disc (72). The inner hole disc (73) is located between the extrusion pipe (6) and the outer hole disc (72). A plurality of second holes (731), a plurality of third holes (732) and a plurality of fourth holes (733) are arranged in a circumferential array on the inner hole disc (73). The plurality of third holes (732) are respectively located on one side of the plurality of second holes (731). The plurality of fourth holes (733) are respectively located on the other side of the plurality of second holes (731). A shift lever (74) is connected to the outer wall of the inner hole disc (73). The shift lever (74) is slidably connected through the inner wall of the outer hole disc (72). A part of the shift lever (74) is located outside the outer hole disc (72).

5. The puffing device for feed processing according to claim 4, characterized in that: Inner cylinders (76) are respectively rotatably connected in the plurality of through holes of the kneading cylinder (75). A first gear (77) is connected to the outer wall of the rotating shaft (71). A second gear (78) is connected to the outer wall of the inner cylinder (76). The plurality of second gears (78) are all meshed with the first gear (77). A plurality of blades (79) are connected to the inner wall of the inner cylinder (76).

6. The puffing device for feed processing according to claim 5, wherein: The tool changing assembly (8) includes a mounting frame (84), the mounting frame (84) is installed on the inner wall of the top of the housing (1), a reciprocating lead screw (82) is rotatably connected between the bottom of the mounting frame (84) and the outer wall of the left side of the housing (1), the left end of the reciprocating lead screw (82) penetrates through the outer wall of the left side of the housing (1), a fourth gear (83) is connected to the left end of the reciprocating lead screw (82), a third gear (81) is connected to the outer wall of the outer hole disc (72), the third gear (81) meshes with the fourth gear (83), a ball slider (85) is slidably connected to the bottom of the mounting frame (84), a reciprocating thread groove is provided on the reciprocating lead screw (82), the inner wall of the ball slider (85) is slidably connected to the reciprocating thread groove of the reciprocating lead screw (82) through a ball, a roller (86) is connected to the outer wall of the ball slider (85), a driven shaft (87) is connected to the right end of the mounting shaft (10), three first arc-shaped blocks (88) and three second arc-shaped blocks (89) are circumferentially arranged on the outer wall of the driven shaft (87), and the first arc-shaped blocks (88) and the second arc-shaped blocks (89) are both located on the movement track of the roller (86).

7. An extrusion device for feed processing according to claim 6, characterized in that: The grinding assembly (9) includes a mounting seat (91), the mounting seat (91) is installed at the left edge of the top surface of the housing (1), a gantry frame (92) is slidably installed on the mounting seat (91), the gantry frame (92) has two inner sides, grinding blocks (93) are respectively connected to the two inner sides of the gantry frame (92) through springs, a brush plate (97) is connected to the rear side of the grinding block (93) through a spring, and the two grinding blocks (93) and the two brush plates (97) are both located on the movement track of the cutting tool (11).

8. An extrusion device for feed processing according to claim 7, characterized in that: A groove rod (94) is slidably installed between the bottom of the mounting frame (84) and the inner wall of the left side of the housing (1), the groove rod (94) penetrates through the inner wall of the left side of the housing (1), the left end of the groove rod (94) is connected to the gantry frame (92), a corrugated groove is provided on the groove rod (94), a connecting rod (95) is connected to the outer wall of the ball slider (85), a sliding shaft (96) is connected to the end of the connecting rod (95) away from the ball slider (85), and the sliding shaft (96) is slidably connected to the corrugated groove of the groove rod (94).

9. The puffing device for feed processing according to claim 8, characterized in that: A liquid tank (99) is installed on the top of the housing (1), an air bag (98) is installed on the inner wall of the left side of the housing (1), the air bag (98) is located on the movement track of the ball slider (85), a trachea (910) is connected between the air bag (98) and the liquid tank (99), a liquid pipe (911) is installed on the liquid tank (99), two spray pipes (912) are connected to the liquid pipe (911), nozzles are provided at the ends of the spray pipes (912) away from the liquid pipe (911), and the nozzles of the two spray pipes (912) are respectively located in front of the two grinding blocks (93).

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