Mixing and drying equipment for pet food production and processing and drying method

Abstract

The invention discloses material mixing and drying equipment for pet food production and processing, which is characterized in that a grating plate is mounted in a mixing and drying box, the mixing and drying box is divided into two parts by the grating plate, and a feeding port positioned at the side top and a material control port positioned at the side bottom are formed in the mixing and drying box on the upper side of the grating plate; a discharging port located in the side bottom and a feeding port located in the side top are formed in the portion, on the lower side of the grating plate, of the mixed drying box, the material control port is connected with the feeding port, a certain height is reserved between the material control port and the grating plate to serve as the material control height, and a material control assembly is installed at the material control port. The hot air plate is installed on the lower side of the mixed drying box, an air supply hole is formed in the hot air plate, an opening and closing piece is installed in the air supply hole, and the opening and closing piece is in an open state during air supply of the air supply device and is in a closed state during air supply stopping of the air supply device; the air supply device and the heater are installed at the bottom of the mixing drying box below the hot air plate, efficient energy-saving mixing drying is completed, and the problem of powder carrying is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of pet food production, and specifically relates to a mixing and drying device and a drying method for pet food production and processing. Background Art

[0002] Pet food is specially provided for pets and small animals, which is a high-grade animal food between human food and traditional livestock and poultry feed. Some pet foods need to add different raw materials for stirring and mixing during the production process.

[0003] After retrieval, in the prior art, such as a pet food mixing device proposed in CN 209005615U, it is impossible to simultaneously perform drying treatment on food. After mixing, it needs to be separately taken out to a drying station for drying and processing, resulting in poor convenience in using the device and affecting its production efficiency. Another example is a mixing and drying device for pet food production and processing proposed in CN220818326U. Although it can complete the mixing and drying operation, there will be a problem of powder on the surface of the material during the mixing and drying process.

[0004] Therefore, a mixing and drying device and a drying method for pet food production and processing are proposed to solve the above-mentioned problems. Summary of the Invention

[0005] In order to solve the above technical problems, the inventor has obtained the technical solution of the present invention through practice and summary. The present invention adopts the following technical solutions:

[0006] A mixing and drying device for pet food production and processing, comprising:

[0007] A mixing and drying box, inside which a grid plate is installed. The grid plate divides the mixing and drying box into two parts. On the mixing and drying box above the grid plate, a feeding port is provided at the side top and a material control port is provided at the side bottom. On the mixing and drying box below the grid plate, a discharge port is provided at the side bottom and a feeding port is provided at the side top. The material control port and the feeding port are connected, and a certain height is reserved between the material control port and the grid plate as the material control height. A material control component is installed at the material control port;

[0008] A hot air plate, which is installed on the lower side of the mixing and drying box. The hot air plate is provided with air supply holes, and opening and closing members are installed in the air supply holes. The opening and closing members are in an open state during the air supply of the air supply device and in a closed state during the stop of the air supply of the air supply device;

[0009] An air supply device and a heater, which are installed at the bottom of the mixing and drying box below the hot air plate.

[0010] In a further optimization of the above solution, the opening and closing member includes a connecting frame mounted on the upper surface of the hot air plate. The connecting frame is located at the upper outer periphery of the air supply hole. An installation ring is installed in the middle of the connecting frame. A column body is slidably fitted in the installation ring. A connecting disk is installed at the top of the column body, and a wind guiding member is installed at the bottom. The connecting disk and the wind guiding member are respectively located on the upper and lower sides of the installation ring. A spring and a lifting ring are sequentially sleeved on the outer side of the column body from top to bottom above the installation ring. A circumferentially continuous wavy surface is provided on the side of the lifting ring opposite to the installation ring. The lifting ring can only slide axially relative to the column body. A folding structure is installed on the connecting disk.

[0011] In a further optimization of the above solution, the folding structure includes a first thin rod rotatably connected to the lifting ring and a second thin rod rotatably connected to the connecting disk. Multiple groups of the first thin rod and the second thin rod are both circumferentially distributed. The end of the first thin rod is rotatably installed on the body of the second thin rod. A flexible cover sheet is installed on the outer side of multiple groups of the second thin rod.

[0012] In a further optimization of the above solution, the bottom of the wind guiding member is a spherical surface with a lower middle and higher edges, and a wind guiding arc groove is provided on the spherical surface.

[0013] In a further optimization of the above solution, multiple groups of the feeding ports, the material control ports, and the feeding ports are all circumferentially and equidistantly distributed. The ports of the feeding ports and the feeding ports are both horizontally offset from the axis of the mixing and drying box.

[0014] In a further optimization of the above solution, the material control assembly includes a laser concentration sensor, a feedback controller, a switch plate, and a driving cylinder. The driving cylinder is fixedly installed on the outer side of the mixing and drying box and the piston rod end is on the switch plate. The switch plate is slidably fitted on the mixing and drying box;

[0015] Both the laser concentration sensor and the feedback controller are installed on the mixing and drying box. The laser concentration sensor is located on the horizontal plane at the same height as the material control port. The laser concentration sensor detects the particle concentration at the height position of the material control port and feeds it back to the feedback controller. The feedback controller controls the driving cylinder to adjust the vertical height of the switch plate.

[0016] In a further optimization of the above solution, the mixing and drying equipment further includes a material box. A crushing assembly and a sieve plate are installed in the material box. The sieve plate is located at the bottom of the crushing assembly. A conical hopper is provided in the material box below the sieve plate. A spiral conveyor is installed at the bottom of the conical hopper. The discharge end of the spiral conveyor is connected to the feeding port.

[0017] In a further optimization of the above solution, the crushing component includes a mounting frame fixed to the top of the material box. A crushing motor and a transmission shaft are mounted on the mounting frame. A first bevel gear is mounted on the transmission shaft, and a rotating frame is mounted on the outer side of the rotating shaft. A horizontal shaft is mounted on the rotating frame through a bearing. There are two groups of horizontal shafts symmetrically distributed on both sides of the transmission shaft. A second bevel gear is mounted at one end of the horizontal shaft, and the second bevel gear meshes with the first bevel gear. Crushing blades are mounted on the horizontal shaft.

[0018] In a further optimization of the above solution, the spiral conveyor includes a screening cylinder with end plates provided at both ends. A conveyor shaft and spiral vanes distributed around the conveyor shaft are installed inside the screening cylinder. The two ends of the conveyor shaft are respectively mounted on the corresponding end plates through bearings. A driving motor is mounted on one of the end plates. The screening cylinder is inclined. An upper opening is provided above the bottom end of the screening cylinder, and a lower opening is provided below the top end. The upper opening is connected to the conical hopper, and the lower opening is connected to the feeding port.

[0019] A mixing and drying method for pet food production and processing, using the drying equipment described above, the drying steps are as follows:

[0020] Step 1, raw material crushing

[0021] Put the raw materials into the feeding box. The driver drives the sieve plate to rotate. The crushing cutting tools make a rotary motion under the action of the friction force of the sieve plate. At the same time, the rotating shaft is driven to rotate through the second bevel gear and the first bevel gear, and the crushing cutting tools crush the raw materials.

[0022] Step 2, primary screening

[0023] The crushed raw material particles are screened by the sieve plate. The particles that meet the size requirements fall into the conical hopper, and the particles that do not meet the size requirements remain on the sieve plate.

[0024] Step 3, secondary screening

[0025] The raw material particles in the conical hopper enter the screening cylinder. The driving motor drives the conveyor shaft to rotate. The spiral vanes convey the raw material particles upward and screen them again during the upward conveyance. The raw material particles that do not meet the size requirements pass through the screening cylinder and fall to the bottom of the material box, and the raw material particles that meet the size requirements are sent into the mixing and drying box.

[0026] Step 4, primary mixing and drying

[0027] Each raw material particle enters the interior of the mixing and drying oven through the feeding port. The air blower and the heater operate to convey hot air flow into the interior of the mixing and drying oven. The hot air flow passes through the sieve plate to conduct primary drying treatment on each raw material particle. The raw material particles after the drying treatment will remain on the grid plate. The laser concentration sensor detects that the concentration of the raw material particles meets the requirements and feeds the detected value back to the feedback controller. The feedback controller controls the driving cylinder to adjust the opening degree of the switch plate to control the opening of the material control port and controls the material control height of the raw material particles above the grid plate.

[0028] Step 5, secondary mixing and drying

[0029] The raw material particles after the primary mixing and drying enter the area below the grid plate. The raw material particles will be subjected to secondary mixing and drying by the hot air flow. During the period when the hot air flow enters the area above the hot air plate through the air supply holes, the hot air flow will act on the flexible cover sheet through the air supply holes. The flexible cover sheet is stressed to drive the second thin rod and the first thin rod to turn upward. While the second thin rod turns upward, it also acts on the connecting disk to move downward and compress the spring. While the connecting disk moves downward, the air guiding member moves downward and approaches the top of the air supply hole.

[0030] When the hot air flow passes through the top position of the air supply hole, the air guiding member will rotate against the spring force when passing through the hot air flow through the air guiding arc groove. Due to the wavy surface setting on the contact side of the lifting ring and the mounting ring, the connecting disk will float up and down. After the hot air flow mixes and dries the raw materials below the grid plate, it rises through the grid plate to mix and dry the raw material particles above the grid plate.

[0031] Step 6, discharging

[0032] After the secondary mixing and drying meets the requirements, it is discharged through the discharge port, cooled to room temperature in a sterile environment, and then subjected to packaging treatment.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. In the present invention, the mixing and drying oven is separated by the grid plate to form upper and lower chambers. The air blower sends hot air into the heater, and after the hot air is sent in, it first mixes and dries the materials in the lower chamber, and then uses the hot air with a certain amount of heat loss after the mixing and drying to mix and dry the materials in the upper chamber again. Through the separate drying of the upper and lower chambers, energy consumption can be effectively saved, and at the same time, the problem of powder hanging after the mixing and drying of the materials can be avoided.

[0035] 2. In the present invention, there are air supply holes provided on the hot air plate, and an automatically opening and closing structure is installed at the top of the air supply port. The structure is unfolded by the action of the hot air, and at the same time, the air guiding room moves downward and approaches the top opening of the air supply hole. The overall rotation of the structure can be realized by using the air guiding member. During the rotation process, a cyclic breathing and guiding state formed by the small-scale opening and closing of the flexible cover sheet can be completed, thereby ensuring the mixing and drying effect.

[0036] 3. Before the material enters the mixing and drying box, the material is crushed. After the crushing process, the material is turned over immediately and the crushed material is preliminarily screened to ensure the powder removal effect of subsequent mixing and drying. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is the top view of the overall structure of the present invention;

[0038] Figure 2 is the schematic structural diagram inside the material box and the mixing and drying box of the present invention;

[0039] Figure 3 is Figure 2 the partial enlarged view at A in

[0040] Figure 4 is Figure 3 the state diagram when the opening and closing member is in the open state in

[0041] Figure 5 is the cross-sectional view of the lifting ring and the column;

[0042] Figure 6 is the top view of the mounting ring and the connecting frame;

[0043] Figure 7 is the side view of the lifting ring and the mounting ring;

[0044] Figure 8 is the bottom structure diagram of the air guiding member;

[0045] Figure 9 is the top view of the material box;

[0046] Figure 10 is the cross-sectional structure diagram of the screw conveyor;

[0047] Figure 11 is the front view of the mixing and drying box.

[0048] 10. Mixing drying oven; 11. Grille plate; 12. Feeding port; 13. Material control port; 14. Discharge port; 15. Feeding port; 20. Hot air plate; 21. Air supply hole; 22. Opening and closing part; 221. Connecting frame; 222. Mounting ring; 223. Cylinder; 224. Connecting disc; 225. Air guiding part; 226. Spring; 227. Lifting ring; 228. First thin rod; 229. Second thin rod; 230. Flexible cover sheet; 231. Air guiding arc groove; 23. Driving cylinder; 24. Laser concentration sensor; 25. Feedback controller; 26. Switch plate; 30. Air blower; 40. Heater; 50. Material box; 51. Loading box; 52. Unloading box; 53. Connecting piece; 54. Sieve plate; 55. Driver; 56. Conical hopper; 57. Screw conveyor; 58. Mounting frame; 59. Rotating shaft; 60. Rotating frame; 61. First bevel gear; 62. Horizontal shaft; 63. Second bevel gear; 64. Crushing tool; 571. Screening cylinder; 572. Sealing plate; 573. Screw blade; 574. Conveyor shaft. Detailed implementation mode

[0049] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0050] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0051] Embodiment 1

[0052] As Figure 1 、 2 shown, a mixing and drying device for pet food production and processing includes:

[0053] A mixing drying oven 10, a grille plate 11 is installed inside the mixing drying oven 10, the grille plate 11 divides the mixing drying oven 10 into two parts. On the mixing drying oven 10 above the grille plate 11, a feeding port 12 located at the side top and a material control port 13 located at the side bottom are provided. On the mixing drying oven 10 below the grille plate 11, a discharge port 14 located at the side bottom and a feeding port 15 located at the side top are provided. The material control port 13 and the feeding port 15 are connected. A certain height is reserved between the material control port 13 and the grille plate 11 as the material control height. A material control component is installed at the material control port 13;

[0054] The hot air plate 20 is installed on the lower side of the mixing and drying oven 10. The hot air plate 20 is provided with air supply holes 21, and opening and closing members 22 are installed in the air supply holes 21. The opening and closing members 22 are in an open state during the air supply of the air supply device 30 and in a closed state during the stop of the air supply of the air supply device 30;

[0055] The air supply device 30 and the heater 40 are installed at the bottom of the mixing and drying oven 10 below the hot air plate 20.

[0056] The air supply device 30 sends air into the mixing and drying oven 10. The air forms a hot air flow after being heated by the heater 40. The hot air flow is sent through the air supply holes 21 on the hot air plate 20, opening the opening and closing members 22, and mixing and drying the materials above it. The air flow after losing a certain amount of heat during the mixing and drying continues to rise upward through the grid plate 11 to initially mix and dry the materials added to the upper area of the grid plate 11 from the feeding port 12. The materials after the mixing and drying are controlled by the material control component to control the height of the materials on the grid plate 11, and the materials higher than the controlled height are sent into the area below the grid plate 11, that is, the area between the hot air plate 20 and the grid plate 11, for re - mixing. The air flow is discharged from the top of the mixing and drying oven 10, and the powder generated during the mixing and drying process is recovered by the tail gas recovery system. When the mixing and drying meets the set requirements, it is discharged from the discharge port 14.

[0057] Among them, as Figures 3 to 8 shown, the opening and closing member 22 includes a connecting frame 221 installed on the upper surface of the hot air plate 20. The connecting frame 221 is located at the upper - outer periphery of the air supply hole 21. An installation ring 222 is installed in the middle of the connecting frame 221. A column 223 is slidably fitted in the installation ring 222. A connecting disk 224 is installed at the top of the column 223 and a wind guiding member 225 is installed at the bottom. The connecting disk 224 and the wind guiding member 225 are respectively located on the upper and lower sides of the installation ring 222. A spring 226 and a lifting ring 227 located above the installation ring 222 are sleeved on the outer side of the column 223 in sequence from top to bottom. A circumferentially continuous wave surface is provided on one side of the lifting ring 227 opposite to the installation ring 222. The lifting ring 227 can only slide axially relative to the column 223. A retractable structure is installed on the connecting disk 224.

[0058] Among them, the retractable structure includes a first thin rod 228 rotatably connected to the lifting ring 227 and a second thin rod 229 rotatably connected to the connecting disk 224. Both the first thin rod 228 and the second thin rod 229 are circumferentially distributed in multiple groups. The end of the first thin rod 228 is rotatably installed on the body of the second thin rod 229. A flexible cover sheet 230 is installed on the outer side of multiple groups of the second thin rods 229.

[0059] Among them, the bottom of the wind guiding member 225 is a spherical surface with a lower middle and a higher edge, and a wind guiding arc groove 231 is provided on the spherical surface.

[0060] During specific implementation, under the action of hot air flow on the flexible cover sheet 230, the upward movement under the action of the air flow will drive the first thin rod 228 to expand outward. During the outward expansion, it will act on the column 223 to move closer to the side close to the air supply hole 21. The second thin rod 229 will turn upward. At the same time, the air guiding arc groove 231 on the air guiding member 225 will be affected by the hot air flow and rotate, driving the lifting ring 227 to rotate. And during the rotation, the up and down short-distance movement of the lifting ring 227 will be realized through the wavy surface, and the displacement fluctuates frequently between 1-2 mm, thereby completing the breathing fluctuation and simultaneous rotation of the flexible cover sheet 230, and then improving the mixing and drying efficiency. When the hot air stops being conveyed, the spring 226 can automatically lift the connecting plate 224 upward, so that the first thin rod 228 is reset, and the flexible cover sheet 230 automatically covers above the air supply hole 21 to prevent the material from blocking the air supply hole 21.

[0061] Example 2

[0062] In Example 1, as Figure 1 shown, a plurality of groups of the feeding ports 12, the material control ports 13 and the feeding ports 15 are circumferentially and equally spaced. The ports of the feeding ports 12 and the feeding ports 15 are horizontally offset from the axis of the mixing and drying box 10, so that the materials are conducive to dispersion after entering, avoiding concentration at one position and ensuring the mixing and drying efficiency.

[0063] Example 3

[0064] In Example 1, in order to realize automatic material control, as Figure 1 、 Figure 11 shown, the material control assembly includes a laser concentration sensor 24, a feedback controller 25, a switch plate 26 and a driving cylinder 23. The driving cylinder 23 is fixedly installed on the outside of the mixing and drying box 10 and the piston rod end is on the switch plate 26, and the switch plate 26 is slidably matched with the mixing and drying box 10;

[0065] The laser concentration sensor 24 and the feedback controller 25 are both installed on the mixing and drying box 10. The laser concentration sensor 24 is located on the horizontal plane at the same height as the material control port 13. The laser concentration sensor 24 detects the particle concentration at the height position of the material control port 13 and feeds it back to the feedback controller 25, and the feedback controller controls the driving cylinder 23 to adjust the up and down height of the switch plate 26.

[0066] The laser concentration sensor 24 detects the material concentration at the material control port 13. When it exceeds the set value, the feedback controller 25 will control the driving cylinder 23 to drive the switch plate 26 to open the material control port 13, thereby ensuring the effect of mixing and drying.

[0067] Example 4

[0068] In Example 1, as Figure 1 、 Figures 9 to 10As shown in the figure, the hybrid drying equipment further includes a material box 50, which comprises a feeding box 51 and a discharging box 52. The feeding box 51 and the discharging box 52 are connected by a connecting piece 53. A crushing assembly is installed in the feeding box 51. A sieve plate 54 is installed between the feeding box 51 and the discharging box 52. A driver 55 for driving the sieve plate 54 to rotate is arranged on the side of the discharging box 52. A conical hopper 56 is arranged in the discharging box 52. A spiral conveyor 57 is installed at the bottom of the conical hopper 56. The discharging end of the spiral conveyor 57 is connected to the feeding port 12.

[0069] The crushing assembly includes a mounting frame 58, which is fixed on the top of the material box 50. A rotating shaft 59 is installed on the mounting frame 58. A first bevel gear 61 is installed on the rotating shaft 59. A rotating frame 60 is installed on the outer side of the rotating shaft 59. A horizontal shaft 62 is installed on the rotating frame 60 through a bearing. There are two groups of horizontal shafts 62, which are symmetrically distributed on both sides of the rotating shaft 59. A second bevel gear 63 is installed at one end of the horizontal shaft 62. The second bevel gear 63 meshes with the first bevel gear 61. Crushing cutters 64 are installed on the horizontal shaft 62. The crushing cutters 64 are in contact with the sieve plate 54.

[0070] As Figure 10 As shown in the figure, the spiral conveyor 57 includes a screening cylinder 571. Sealing plates 572 are arranged at both ends of the screening cylinder 571. A conveying shaft 574 and spiral blades 573 distributed around the conveying shaft 574 are installed inside the screening cylinder 571. The two ends of the conveying shaft 574 are respectively installed on the corresponding sealing plates 572 through bearings. A driving motor is installed on one of the sealing plates 572. The screening cylinder 571 is inclined. An upper opening is arranged at the upper part of the bottom end of the screening cylinder 571, and a lower opening is arranged at the lower part of the top end. The upper opening is connected to the conical hopper 56, and the lower opening is connected to the feeding port 12.

[0071] In order to further reduce the powder-carrying phenomenon of the material in the mixing and drying box 10, the inventor filters out the powdery material during the conveying process by using the screening cylinder 571 after crushing and screening, obtains the material with the required particle size, and sends it into the mixing and drying box 10.

[0072] A mixing and drying method for pet food production and processing, using the drying equipment as described above, is characterized in that the drying steps are as follows:

[0073] Step 1, raw material crushing

[0074] Put the raw materials into the feeding box 51. The driver 55 drives the sieve plate 54 to rotate. The crushing cutters 64 make a rotary motion under the action of the friction force of the sieve plate 54. At the same time, the rotating shaft 59 is driven to rotate through the second bevel gear 63 and the first bevel gear 61. The crushing cutters 64 crush the raw materials.

[0075] Step 2, primary screening

[0076] The crushed raw material particles are screened by the sieve plate 54, and the particles that meet the size requirements fall into the conical hopper 56, while the particles that do not meet the size requirements remain on the sieve plate 54;

[0077] Step 3, secondary screening

[0078] The raw material particles in the conical hopper 56 enter the screening cylinder 571. The driving motor drives the conveying shaft 574 to rotate, and the spiral blades 573 convey the raw material particles upward. During the upward conveyance, screening is carried out again. The raw material particles that do not meet the size requirements pass through the screening cylinder 571 and fall to the bottom of the material box 50, while the raw material particles that meet the size requirements are sent into the mixing and drying box 10;

[0079] Step 4, primary mixing and drying

[0080] Each raw material particle enters the interior of the mixing and drying box 10 through the feeding port 12. The air blower 30 and the heater 40 work to convey hot air flow into the interior of the mixing and drying box 10. The hot air flow passes through the sieve plate 54 to conduct primary drying treatment on each raw material particle. The dried raw material particles will remain on the grid plate 11. The laser concentration sensor 24 detects that the concentration of the raw material particles meets the requirements and gives the detection value to the feedback controller 25. The feedback controller 25 controls the driving cylinder 23 to adjust the opening degree of the switch plate 26 to control the opening of the material control port 13 and control the material control height of the raw material particles above the grid plate 11;

[0081] Step 5, secondary mixing and drying

[0082] The raw material particles subjected to primary mixing and drying enter the area below the grid plate 11. The raw material particles will be subjected to secondary mixing and drying by the hot air flow. During the period when the hot air flow enters the area above the hot air plate 20 through the air supply holes 21, the hot air flow will act on the flexible cover sheet 230 through the air supply holes 21. The flexible cover sheet 230 is stressed to drive the second thin rod 229 and the first thin rod 228 to turn upward. While the second thin rod 229 turns upward, it also acts on the connecting disk 224 to move downward and compress the spring 226. While the connecting disk 224 moves downward, the air guiding member 225 moves downward and approaches the top of the air supply hole 21;

[0083] When the hot air flow passes through the top position of the air supply hole 21, the air guiding member 225 will rotate by overcoming the acting force of the spring 226 when the hot air flow passes through the air guiding arc groove 231. Due to the wavy surface setting on the contact side of the lifting ring 227 and the mounting ring 222, the connecting disk 224 will float up and down. After the hot air flow mixes and dries the raw material particles below the grid plate 11, it rises through the grid plate 11 to mix and dry the raw material particles above the grid plate 11;

[0084] Step 6, discharging

[0085] After meeting the requirements after secondary mixing and drying, it is discharged through the discharge port 14, cooled to room temperature in a sterile environment, and then packaged.

[0086] As described above, only the preferred specific embodiments of the present invention are provided, but the protection scope of the present invention is not limited thereto. The substitution may be a substitution of some structures, devices, method steps, or a complete technical solution. Any equivalent substitution or change made according to the technical solution and inventive concept of the present invention should be covered within the protection scope of the present invention.

Claims

1. A mixing and drying device for pet food production and processing, characterized in that, Comprising: A mixing drying oven (10), inside which a grid plate (11) is installed. The grid plate (11) divides the mixing drying oven (10) into two parts. On the mixing drying oven (10) above the grid plate (11), a feeding port (12) located at the side top and a material control port (13) located at the side bottom are provided. On the mixing drying oven (10) below the grid plate (11), a discharge port (14) located at the side bottom and a feeding port (15) located at the side top are provided. The material control port (13) and the feeding port (15) are connected. A certain height is reserved between the material control port (13) and the grid plate (11) as the material control height, and a material control component is installed at the material control port (13); A hot air plate (20), which is installed on the lower side of the mixing drying oven (10). The hot air plate (20) is provided with air supply holes (21), and an opening and closing member (22) is installed in the air supply holes (21). The opening and closing member (22) is in an open state during the air supply of the air supply device (30) and in a closed state during the stop of the air supply of the air supply device (30); An air supply device (30) and a heater (40), which are installed at the bottom of the mixing drying oven (10) below the hot air plate (20).

2. The mixing and drying equipment for pet food production according to claim 1, wherein, The opening and closing member (22) includes a connecting frame (221) installed on the upper surface of the hot air plate (20). The connecting frame (221) is located on the outer periphery above the air supply hole (21). An installation ring (222) is installed in the middle of the connecting frame (221). A column body (223) is slidably fitted in the installation ring (222). A connecting disc (224) is installed at the top of the column body (223), and a wind guiding member (225) is installed at the bottom. The connecting disc (224) and the wind guiding member (225) are respectively located on the upper and lower sides of the installation ring (222). A spring (226) located above the installation ring (222) and a lifting ring (227) are sequentially sleeved on the outer side of the column body (223) from top to bottom. A circumferentially continuous wavy surface is provided on the side of the lifting ring (227) opposite to the installation ring (222). The lifting ring (227) can only slide axially relative to the column body (223), and a folding and unfolding structure is installed on the connecting disc (224).

3. The mixing and drying equipment for pet food production according to claim 2, characterized in that, The folding and unfolding structure includes a thin rod one (228) rotatably connected to the lifting ring (227) and a thin rod two (229) rotatably connected to the connecting disc (224). Both the thin rod one (228) and the thin rod two (229) are circumferentially distributed in multiple groups. The end of the thin rod one (228) is rotatably installed on the body of the thin rod two (229). A flexible cover sheet (230) is installed on the outer sides of multiple groups of the thin rod two (229).

4. A mixing and drying device for pet food production and processing according to claim 2, characterized in that, The bottom of the wind guiding member (225) is a spherical surface with a lower middle and a higher edge, and a wind guiding arc groove (231) is provided on the spherical surface.

5. A mixing and drying device for pet food production and processing according to claim 1, characterized in that, The feeding port (12), the material control port (13), and the feeding port (15) are all circumferentially distributed and equally spaced in multiple groups. The feeding ports of the feeding port (12) and the feeding port (15) are horizontally offset from the axis of the mixing drying oven (10).

6. A mixing and drying device for pet food production and processing according to claim 1, characterized in that, The material control component includes a laser concentration sensor (24), a feedback controller (25), a switch board (26) and a driving cylinder (23). The driving cylinder (23) is fixedly installed on the outer side of the mixing and drying oven (10), and the piston rod end is on the switch board (26). The switch board (26) is slidably fitted on the mixing and drying oven (10). Both the laser concentration sensor (24) and the feedback controller (25) are installed on the mixing and drying oven (10). The laser concentration sensor (24) is located on the horizontal plane at the same height as the material control port (13). The laser concentration sensor (24) detects the particle concentration at the height position of the material control port (13) and feeds it back to the feedback controller (25). The feedback controller controls the driving cylinder (23) to adjust the vertical height of the switch board (26).

7. A mixing and drying device for pet food production and processing according to claim 1, characterized in that, The mixing and drying equipment further includes a material box (50). The material box (50) includes a feeding box (51) and a discharging box (52). The feeding box (51) and the discharging box (52) are connected by a connecting piece (53). A crushing component is installed in the feeding box (51). A sieve plate (54) is installed between the feeding box (51) and the discharging box (52). A driver (55) for driving the sieve plate (54) to rotate is arranged on the side of the discharging box (52). A conical hopper (56) is arranged in the discharging box (52). A spiral conveyor (57) is installed at the bottom of the conical hopper (56). The discharging end of the spiral conveyor (57) is connected to the feeding port (12).

8. A mixing and drying device for pet food production and processing according to claim 7, characterized in that, The crushing component includes a mounting frame (58). The mounting frame (58) is fixed to the top of the material box (50). A rotating shaft (59) is installed on the mounting frame (58). A first bevel gear (61) is installed on the rotating shaft (59). A rotating frame (60) is installed on the outer side of the rotating shaft (59). A horizontal shaft (62) is installed on the rotating frame (60) through a bearing. There are two groups of horizontal shafts (62) and they are symmetrically distributed on both sides of the rotating shaft (59). A second bevel gear (63) is installed at one end of the horizontal shaft (62). The second bevel gear (63) meshes with the first bevel gear (61). Crushing cutters (64) are installed on the horizontal shaft (62). The crushing cutters (64) contact the sieve plate (54).

9. A mixing and drying device for pet food production and processing according to claim 8, characterized in that, The spiral conveyor (57) includes a screening cylinder (571). Sealing plates (572) are arranged at both ends of the screening cylinder (571). A conveying shaft (574) and spiral blades (573) distributed around the conveying shaft (574) are installed inside the screening cylinder (571). The two ends of the conveying shaft (574) are respectively installed on the corresponding sealing plates (572) through bearings. A driving motor is installed on one of the sealing plates (572). The screening cylinder (571) is inclined. An upper opening is arranged at the upper part of the bottom end of the screening cylinder (571), and a lower opening is arranged at the lower part of the top end. The upper opening is connected to the conical hopper (56), and the lower opening is connected to the feeding port (12).

10. A mixing and drying method for pet food production and processing, using the drying equipment described in any one of claims 1 to 9, characterized in that, The drying steps are as follows: Step 1, raw material crushing Put the raw materials into the feeding box (51). The driver (55) drives the sieve plate (54) to rotate. The crushing tool (64) makes a rotary motion under the frictional force of the sieve plate (54). At the same time, the rotating shaft (59) is driven to rotate through the second bevel gear (63) and the first bevel gear (61). The crushing tool (64) crushes the raw materials; Step 2, primary screening The crushed raw material particles are screened by the sieve plate (54). The particles that meet the size requirements fall into the conical hopper (56), and the particles that do not meet the size requirements remain on the sieve plate (54); Step 3, secondary screening The raw material particles in the conical hopper (56) enter the screening cylinder (571). The driving motor drives the conveying shaft (574) to rotate. The spiral blade (573) conveys the raw material particles upward, and screening is carried out again during the upward conveyance. The raw material particles that do not meet the size requirements pass through the screening cylinder (571) and fall to the bottom of the material box (50). The raw material particles that meet the size requirements are sent into the mixing and drying box (10); Step 4, primary mixing and drying Each raw material particle enters the interior of the mixing and drying box (10) from the feeding port (12). The air blower (30) and the heater (40) work to convey hot air flow into the interior of the mixing and drying box (10). The hot air flow passes through the sieve plate (54) to carry out primary drying treatment on each raw material particle. The dried raw material particles will remain on the grid plate (11). The laser concentration sensor (24) detects that the concentration of the raw material particles meets the requirements and gives the detection value to the feedback controller (25). The feedback controller (25) controls the driving cylinder (23) to adjust the opening degree of the switch plate (26) to control the opening degree of the material control port (13) and control the material control height of the raw material particles above the grid plate (11); Step 5, secondary mixing and drying The raw material particles after primary mixing and drying enter the area below the grid plate (11). The raw material particles will be subjected to secondary mixing and drying by the hot air flow. During the period when the hot air flow enters the area above the hot air plate (20) through the air supply holes (21), the hot air flow will act on the flexible cover sheet (230) through the air supply holes (21). The flexible cover sheet (230) is stressed to drive the second thin rod (229) and the first thin rod (228) to turn upward. While the second thin rod (229) turns upward, it also acts on the connecting disk (224) to move downward and compress the spring (226). While the connecting disk (224) moves downward, the air guiding member (225) moves downward and approaches the top of the air supply hole (21); When the hot air flow passes through the top position of the air supply hole (21), the air guiding member (225) will rotate against the force of the spring (226) when the hot air flow passes through the air guiding arc groove (231). Due to the wavy surface setting of the contact side between the lifting ring (227) and the mounting ring (222), the connecting disk (224) will float up and down. After the hot air flow mixes and dries the raw materials below the grid plate (11), it rises through the grid plate (11) to mix and dry the raw material particles above the grid plate (11); Step 6, discharging After meeting the requirements after secondary mixing and drying, discharging is completed through the discharging port (14). After cooling to room temperature in a sterile environment, packaging treatment can be carried out.

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