A skeleton crushing device for pet food production and its use method

Abstract

The present invention relates to the technical field of pet food production, specifically a skeleton crushing device for pet food production, comprising a cutting part and a crushing part, wherein the cutting part is connected to the upper side of the crushing part, and the crushing part comprises a first crushing part and a second crushing part, wherein the first crushing part is vertically connected to the upper side of the second crushing part, and a connecting neck is provided between the first crushing part and the second crushing part, and a drying component is connected to the outside of the connecting neck. A skeleton crushing device for pet food production and a method for using the same comprise the following steps: A1. Weighing; A2. Preliminary drying; A3. Cutting; A4. Preliminary crushing; A5. Secondary drying; A6. Secondary crushing; A7. Discharging. By using the skeleton crushing device of the present application to efficiently dry and crush the skeleton, the excess moisture inside the frozen skeleton can be greatly reduced, the crushing efficiency and crushing effect of the skeleton can be improved, and the production of pet food is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of pet food production, and in particular to a skeleton crushing device for pet food production and a method of using the same. Background Art

[0002] Currently, keeping pets has become a popular lifestyle. With the upgrading of consumption, pet owners have an increasing demand for high-freshness meat pet food, pet nutritional products and other products, and the production requirements for high-freshness meat pet food have also increased accordingly.

[0003] Bones account for approximately 20%-30% of an animal's body weight and are rich in nutrients, primarily collagen, bone oil, phospholipids, bone polysaccharides, and minerals. In pet food production, bones are often ground into bone meal as a raw material. However, due to the vastly varying sizes and shapes of animal skeletons, existing skeleton crushing equipment cannot simultaneously crush multiple animal skeletons. Furthermore, due to the high humidity of frozen skeletons, drying the skeletons is necessary to prevent clogging within the crushing equipment.

[0004] For example, a skeleton crushing device for pet food production, with application number CN2020229432127, has a first-stage crushing roller, a second-stage crushing roller, and a third-stage crushing roller installed inside the housing, from left to right. A first sieve plate, a second sieve plate, and a third sieve plate are respectively positioned directly below the first, second, and third crushing rollers. Furthermore, a first guide plate and a second guide plate are fixed below the first and second sieve plates, respectively. This skeleton crushing device for pet food production facilitates simultaneous crushing of the skeletons of different animals, improves work efficiency, and achieves filtered, cyclical crushing to ensure product quality.

[0005] However, in this application, there is no drying part, and the skeleton with high humidity is easy to clog the screen plate after crushing, making it difficult to separate. In addition, in order to meet the multi-stage crushing requirements, the equipment occupies a large area and consumes high energy.

[0006] The technical problem to be solved by the present invention is: to design a skeleton crushing device for pet food production and its use method, so as to facilitate efficient crushing and separation of the skeleton and prevent the skeleton powder from clogging the discharge port of the equipment. Summary of the Invention

[0007] To solve the above problems, the present invention provides a skeleton crushing device for pet food production and a method of using the same.

[0008] The technical solution adopted by the present invention to solve its technical problems is: a skeleton crushing device for pet food production, including a cutting part and a crushing part, the cutting part is connected to the upper side of the crushing part, the crushing part includes a first crushing part and a second crushing part, the first crushing part is vertically connected to the upper side of the second crushing part, a connecting neck is provided between the first crushing part and the second crushing part, and a drying component is connected to the outside of the connecting neck.

[0009] As an optimization, the upper side of the cutting part is connected to a drying part, and the drying part includes a drying box, the lower part of the drying box is connected to a horizontal air inlet plate, the outer end of the air inlet plate is connected to a first air inlet pipe, and the inner side of the air inlet plate is evenly and densely provided with air outlet holes;

[0010] The bottom opening of the drying box is connected to the upper end of the cutting part. The bottom of the drying box is slidably connected to a sealing plate. The outer side of the sealing plate is connected to a telescopic push rod. The outer side of the drying box is symmetrically connected to several limiting ear plates. A support frame is provided on the lower side of the limiting ear plate, and a pressure sensor is provided between the support frame and the limiting ear plate.

[0011] As an optimization, the cutting part includes a cutting shell and a cutting roller. The bottom of the cutting shell is connected to the top of the first crushing part. One side of the cutting shell is a vertical surface, and the other side of the cutting shell is an arc-shaped surface. The cutting roller is horizontally arranged inside the cutting shell. A cutting blade is provided on the outer side of the cutting roller. The blade of the cutting blade is arranged adjacent to the inner side of the vertical surface. A cutting motor is connected to one end of the axis of the cutting roller.

[0012] As an optimization, the cutting blade includes several radial blades and several circumferential blades. The several circumferential blades are arranged in an array along the axial direction of the cutting roller. The circumferential blade is annular and is arranged coaxially with the cutting roller. The length direction of the radial blade is arranged along the length direction of the cutting roller. The radial blade and the circumferential blade form a cutting interval.

[0013] As an optimization, the shell of the first crushing part, the connecting neck and the shell of the second crushing part are coaxially arranged, a first grinding chamber is provided inside the first crushing part, a second grinding chamber is provided inside the second crushing part, and the first grinding chamber and the second grinding chamber are connected to the interior of the connecting neck;

[0014] A fixed plate is provided at the top inner side of the shell of the first crushing part, and a vertical crushing shaft is provided inside the first crushing part, the second crushing part and the connecting neck. The upper end of the crushing shaft is rotatably connected to the fixed plate, and the lower end of the crushing shaft is rotatably connected to the shell of the crushing part. The lower end of the crushing shaft is connected to a crushing motor, and a first grinding roller is fixed to the upper part of the crushing shaft, and a second grinding roller is fixed to the lower part of the crushing shaft. The first grinding roller is arranged in the first grinding chamber, and the second grinding roller is arranged in the second grinding chamber.

[0015] As an optimization, the lower portion of the first grinding chamber and the lower portion of the second grinding chamber are converged into a conical surface, the bottom diameter of the first grinding roller is smaller than the bottom opening diameter of the first grinding chamber, the maximum diameter of the first grinding roller is smaller than the maximum diameter of the first grinding chamber, and the maximum diameter of the first grinding roller is larger than the bottom opening diameter of the first grinding chamber;

[0016] The bottom diameter of the second grinding roller is smaller than the bottom diameter of the second grinding chamber, the maximum diameter of the second grinding roller is smaller than the maximum diameter of the second grinding chamber, and the maximum diameter of the second grinding roller is larger than the minimum diameter of the second grinding roller;

[0017] The distance between the bottom of the first grinding chamber and the bottom of the first grinding roller is greater than the distance between the bottom of the second grinding chamber and the bottom of the second grinding roller.

[0018] As an optimization, the drying component includes an air uniforming plate and a second air inlet pipe. The air uniforming plate is annular and is fixed to the outer side of the lower part of the connecting neck. The connecting neck is provided with several through drying air outlets. The interior of the air uniforming plate is provided with an air uniforming cavity. The air uniforming cavity is connected with the interior of the connecting neck through the drying air outlet. An inclined material baffle is provided on the upper side of the drying air outlet, and several material baffles are arranged in a circular array along the inner wall of the connecting neck.

[0019] As an optimization, the bottom of the second crushing part is connected to a discharge base, and an inclined discharge channel is provided inside the discharge base. The upper end of the discharge channel is connected to the bottom of the second grinding chamber, and the other end of the discharge channel is connected to the outside of the discharge base. The outer casing of the crushing motor is fixedly connected to the discharge base.

[0020] A skeleton crushing device for pet food production and a method for using the same, comprising the following steps:

[0021] A1. Weighing: The top of the dried portion of the skeleton to be crushed is added to the drying box. After the feeding is completed, the pressure sensor monitors the weight of the skeleton.

[0022] A2. Preliminary Drying: Hot air is introduced into the drying box through the first air inlet pipe to dry the crushed skeleton. The weight of the crushed skeleton is monitored at all times by a pressure sensor. When the weight of the crushed skeleton drops to an appropriate value, the first air inlet pipe is closed.

[0023] A3. Cutting: The telescopic push rod drives the sealing plate to retract, opening the bottom of the drying box. The preliminarily dried skeleton to be crushed enters the cutting part. The cutting motor starts to operate, driving the cutting roller to rotate, and the cutting blade efficiently cuts the skeleton to be crushed.

[0024] A4. Preliminary Crushing: The grinding motor drives the first and second grinding rollers to rotate. The fragments of the skeleton to be crushed, cut into pieces in step A3, enter the first grinding chamber. The first grinding roller and the first grinding chamber interact with each other to achieve preliminary crushing. When the particle size of the skeleton to be crushed is smaller than the distance between the first grinding roller and the first grinding chamber, the skeleton to be crushed enters the connecting neck.

[0025] A5. Secondary drying: Hot air is introduced into the connecting neck through the second air inlet duct and the air distribution plate. The broken skeleton after the initial crushing in step A4 enters the connecting neck and is fully exposed to the hot air rising from the bottom.

[0026] A6. Secondary Crushing: After the secondary drying in step A5, the crushed skeleton enters the second grinding chamber and is ground by the second grinding roller. When the particle size of the skeleton is smaller than the distance between the second grinding roller and the second grinding chamber, the crushed skeleton is discharged from the second grinding chamber.

[0027] A7. Discharge: The crushed skeleton is discharged through the discharge channel.

[0028] The beneficial effect of this solution is that a skeleton crushing device for pet food production has the following benefits:

[0029] The drying part, cutting part and crushing part of the present application are arranged vertically, the equipment occupies a small area, facilitates the flow of materials, and can save equipment energy consumption;

[0030] The drying part is connected to the upper part of the equipment to perform preliminary drying of the skeleton. The dried material is cut into blocks by the cutting part, which is convenient for the skeleton to enter the first crushing part. After the initial crushing in the first crushing part, it is further crushed by the second crushing part, which improves the crushing efficiency of the skeleton and facilitates the production of pet food.

[0031] The drying component is connected to the outside of the connecting neck. After the hot air enters the crushing part, a large amount of hot air goes upward to further dry the material after preliminary crushing, and a small amount of hot air goes downward along the crushing part to facilitate ventilation inside the crushing part, preventing the crushed skeleton from blocking the circulation of the equipment, ensuring the smooth flow of skeleton powder and ensuring the crushing efficiency of the equipment;

[0032] The drying part is supported by a support frame, and a pressure sensor is set between the support frame and the outer shell of the drying part to facilitate weighing the weight of the feed skeleton, monitoring the moisture loss of the initial drying, monitoring the skeleton crushing process, and improving the working efficiency of the skeleton crushing.

[0033] A method for using a skeleton crushing device for pet food production. The skeleton crushing device of the present application is used to efficiently dry and crush skeletons, which can greatly reduce excess moisture inside frozen skeletons, improve the crushing efficiency and crushing effect of the skeletons, and facilitate the production of pet food. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Attachment Figure 1 It is an axial side schematic diagram of the crushing device of the present invention.

[0035] Attachment Figure 2 This is a schematic diagram of the axial side of the drying part of the present invention.

[0036] Attachment Figure 3 It is an axial schematic diagram of the cutting part of the present invention.

[0037] Attachment Figure 4 It is a schematic diagram of the cutting part of the present invention.

[0038] Attachment Figure 5 The present invention is attached Figure 4 AA cross-section structure diagram.

[0039] Attachment Figure 6 It is a schematic diagram of the axial side of the crushing part of the present invention.

[0040] Attachment Figure 7 It is a schematic diagram of the main view of the crushing part of the present invention.

[0041] Attachment Figure 8 The present invention is attached Figure 7 Schematic diagram of the BB cross-section structure.

[0042] Attachment Figure 9 The present invention is attached Figure 8 Schematic diagram of the enlarged structure of part A.

[0043] Attachment Figure 10 The present invention is attached Figure 8 Schematic diagram of the enlarged structure of part B.

[0044] Attachment Figure 11 The present invention is attached Figure 8 Schematic diagram of the enlarged structure of part C.

[0045] Among them, 1. cutting shell, 2. cutting roller, 3. radial blade, 4. circumferential blade, 5. drying box, 6. air inlet plate, 7. first air inlet pipe, 8. telescopic push rod, 9. sealing plate, 10. support frame, 11. limit ear plate, 12. pressure sensor, 13. first crushing part, 14. second crushing part, 15. connecting neck, 16. cutting interval, 17. first grinding chamber, 18. second grinding chamber, 19. crushing shaft, 20. first grinding roller, 21. second grinding roller, 22. air uniforming plate, 23. second air inlet pipe, 24. drying air outlet, 25. material baffle, 26. discharge base, 27. discharge channel, 28. crushing motor. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0047] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0048] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0049] like Figure 1 、 7As shown, a skeleton crushing device for pet food production includes a cutting part and a crushing part, wherein the cutting part is connected to the upper side of the crushing part, and the crushing part includes a first crushing part 13 and a second crushing part 14, wherein the first crushing part 13 is vertically connected to the upper side of the second crushing part 14, and a connecting neck 15 is provided between the first crushing part 13 and the second crushing part 14, and a drying component is connected to the outside of the connecting neck 15.

[0050] like Figure 2 As shown, the upper side of the cutting part is connected to the drying part, and the drying part includes a drying box 5. The lower part of the drying box 5 is connected to a horizontal air inlet plate 6, and the outer end of the air inlet plate 6 is connected to a first air inlet pipe 7. The inner side of the air inlet plate 6 is evenly and densely provided with air outlet holes.

[0051] like Figure 2 As shown, the bottom opening of the drying box 5 is connected to the upper end of the cutting part, the bottom of the drying box 5 is slidably connected to a sealing plate 9, the outer side of the sealing plate 9 is connected to a telescopic push rod 8, and the outer side of the drying box 5 is symmetrically connected to a plurality of limiting ear plates 11, the lower side of the limiting ear plate 11 is provided with a support frame 10, and a pressure sensor 12 is provided between the support frame 10 and the limiting ear plate 11.

[0052] like Figure 1 、 3 As shown, the cutting part includes a cutting shell 1 and a cutting roller 2. The bottom of the cutting shell 1 is connected to the top of the first crushing part 13. One side of the cutting shell 1 is a vertical surface, and the other side of the cutting shell 1 is an arc-shaped surface. The cutting roller 2 is horizontally arranged inside the cutting shell 1. A cutting blade is provided on the outer side of the cutting roller 2. The blade of the cutting blade is arranged adjacent to the inner side of the vertical surface. A cutting motor is connected to one end of the axis of the cutting roller 2.

[0053] like Figure 3 As shown, the cutting blade includes a plurality of radial blades 3 and a plurality of circumferential blades 4. The plurality of circumferential blades 4 are arranged in an array along the axial direction of the cutting roller 2. The circumferential blades 4 are annular and are arranged coaxially with the cutting roller 2. The length direction of the radial blades 3 is arranged along the length direction of the cutting roller 2. The radial blades 3 and the circumferential blades 4 form a cutting interval 16.

[0054] like Figure 6 、 8 As shown, the shell of the first crushing part 13, the connecting neck 15 and the shell of the second crushing part 14 are coaxially arranged. A first grinding chamber 17 is provided inside the first crushing part 13, and a second grinding chamber 18 is provided inside the second crushing part 14. The first grinding chamber 17 and the second grinding chamber 18 are connected to the interior of the connecting neck 15.

[0055] like Figure 8 As shown, a fixed plate is provided on the top inner side of the shell of the first crushing part 13, and a vertical crushing shaft 19 is provided inside the first crushing part 13, the second crushing part 14 and the connecting neck 15. The upper end of the crushing shaft 19 is rotatably connected to the fixed plate, and the lower end of the crushing shaft 19 is rotatably connected to the shell of the crushing part. The lower end of the crushing shaft 19 is connected to a crushing motor 28, and a first grinding roller 20 is fixed to the upper part of the crushing shaft 19, and a second grinding roller 21 is fixed to the lower part of the crushing shaft 19. The first grinding roller 20 is arranged in the first grinding chamber 17, and the second grinding roller 21 is arranged in the second grinding chamber 18.

[0056] like Figures 8-10 As shown, the lower portion of the first grinding chamber 17 and the lower portion of the second grinding chamber 18 are converged into a conical surface, the bottom diameter of the first grinding roller 20 is smaller than the bottom opening diameter of the first grinding chamber 17, the maximum diameter of the first grinding roller 20 is smaller than the maximum diameter of the first grinding chamber 17, and the maximum diameter of the first grinding roller 20 is larger than the bottom opening diameter of the first grinding chamber 17;

[0057] like Figure 10 As shown, the bottom diameter of the second grinding roller 21 is smaller than the bottom diameter of the second grinding chamber 18, the maximum diameter of the second grinding roller 21 is smaller than the maximum diameter of the second grinding chamber 18, and the maximum diameter of the second grinding roller 21 is larger than the minimum diameter of the second grinding roller 21;

[0058] like Figure 8 As shown, the distance between the bottom of the first grinding chamber 17 and the bottom of the first grinding roller 20 is greater than the distance between the bottom of the second grinding chamber 18 and the bottom of the second grinding roller 21 .

[0059] like Figure 8 As shown, the drying component includes an air uniforming plate 22 and a second air inlet pipe 23. The air uniforming plate 22 is annular and is fixed to the lower outer side of the connecting neck 15. The connecting neck 15 is provided with a plurality of through drying air outlets 24. The interior of the air uniforming plate 22 is provided with an air uniforming cavity, and the air uniforming cavity is connected with the interior of the connecting neck 15 through the drying air outlet 24. The upper side of the drying air outlet 24 is provided with an inclined material baffle plate 25, and a plurality of material baffle plates 25 are arranged in a circular array along the inner wall of the connecting neck 15.

[0060] like Figure 8 As shown, the bottom of the second crushing part 14 is connected to a discharge base 26, and an inclined discharge channel 27 is provided inside the discharge base 26. The upper end of the discharge channel 27 is connected to the bottom of the second grinding chamber 18, and the other end of the discharge channel 27 is connected to the outside of the discharge base 26. The outer shell of the crushing motor 28 is fixedly connected to the discharge base 26.

[0061] This solution also includes a controller, the position of which is set by the staff according to actual conditions during operation. The controller is used to control the electrical devices used in this solution, including but not limited to sensors, motors, telescopic rods, water pumps, solenoid valves, heating wires, heat pumps, display screens, computer input devices, switch buttons, communication equipment, lights, speakers and microphones; the controller is an Intel processor, AMD processor, PLC controller, ARM processor or a single-chip microcomputer, and the supporting components also include a motherboard, memory stick, storage medium and power supply, and the power supply is AC or lithium battery; when a display screen is provided, a display card is also provided; for the operating principle of the controller, please refer to "Principles of Automatic Control", "Microcontroller Principles and Application Simulation Cases" and "Sensor Principles and Applications" published by Tsinghua University Press, and other books in this field can be used for reference; other automatic controls and electrical devices not mentioned are all knowledge well known to those skilled in the art and will not be repeated here.

[0062] A method for using a skeleton crushing device for pet food production comprises the following steps:

[0063] A1. Weighing: The top of the dried portion of the skeleton to be crushed is added to the inside of the drying box 5. After the feeding is completed, the pressure sensor 12 monitors the weight of the input skeleton;

[0064] According to the amount of material fed into the drying box 5, a certain weight difference is set by the controller. The weight difference is the water loss during the initial drying process.

[0065] A2. Preliminary Drying: Hot air is introduced into the drying chamber 5 through the first air inlet duct 7 to dry the crushed skeleton. The weight of the crushed skeleton is monitored at all times by the pressure sensor 12. When the weight of the crushed skeleton drops to a suitable value, the first air inlet duct 7 is closed.

[0066] When the weight difference reaches the set value, the controller controls the ventilation inside the drying box 5 to be closed, and controls the telescopic push rod 8 to operate through the controller;

[0067] A3. Cutting: Telescopic push rod 8 retracts sealing plate 9, opening the bottom of drying chamber 5. The preliminarily dried, crushed skeleton enters the cutting chamber. The cutting motor operates, driving cutting roller 2 to rotate, effectively cutting the skeleton with its cutting blades.

[0068] During the rotation of the cutting roller 2, the cutting roller 2 and the cutting blade drive the skeleton to rotate with the cutting roller 2, and the skeleton is cut by squeezing between the cutting blade and the inner wall of the cutting shell 1, so that the skeleton is cut into skeleton blocks of the size of the cutting interval 16;

[0069] A4. Preliminary Crushing: The grinding motor drives the first and second grinding rollers 20 and 21 to rotate. The fragments of the skeleton to be crushed, cut into pieces in step A3, enter the first grinding chamber 17. The first grinding roller 20 and the first grinding chamber 17 interact with each other to achieve preliminary crushing. When the particle size of the skeleton to be crushed is smaller than the distance between the first grinding roller 20 and the first grinding chamber 17, the skeleton to be crushed enters the connecting neck 15.

[0070] A5. Secondary drying: Hot air is introduced into the connecting neck 15 through the second air inlet pipe 23 and the air plate 22. After the initial crushing in step A4, the broken skeleton enters the connecting neck 15 and is fully exposed to the hot air rising from the bottom.

[0071] Due to the effect of air pressure, a large amount of hot air is directed upward through the connecting neck 15. During the upward process, the hot air can fully contact the skeleton powder dropped from the first grinding chamber 17, thereby improving the drying effect; another part of the hot air is directed downward, which can not only dry the lower skeleton, but also prevent powder blockage and ensure the smooth flow inside the device.

[0072] A6. Secondary Crushing: After secondary drying in step A5, the crushed skeleton enters the second grinding chamber 18 and is ground by the second grinding roller 21. When the particle size of the skeleton is smaller than the distance between the second grinding roller 21 and the second grinding chamber 18, the crushed skeleton is discharged from the second grinding chamber 18.

[0073] A7. Discharge: The crushed skeleton is discharged through the discharge channel 27.

[0074] The above-mentioned specific embodiments are only specific cases of the present invention. The scope of patent protection of the present invention includes but is not limited to the product form and style of the above-mentioned specific embodiments. Any skeleton crushing device for pet food production and its use method that conform to the claims of the present invention and any appropriate changes or modifications made thereto by ordinary technicians in the corresponding technical field shall fall within the scope of patent protection of the present invention.

Claims

1. A skeleton crushing device for pet food production, comprising a cutting part and a crushing part, characterized in that: The cutting part is connected to the upper side of the crushing part, and the crushing part includes a first crushing part (13) and a second crushing part (14). The first crushing part (13) is vertically connected to the upper side of the second crushing part (14). A connecting neck (15) is provided between the first crushing part (13) and the second crushing part (14). The outside of the connecting neck (15) is connected to a drying component. The upper side of the cutting part is connected to a drying part, and the drying part includes a drying box (5). The lower part of the drying box (5) is connected to a horizontal air inlet plate (6), the outer end of the air inlet plate (6) is connected to a first air inlet pipe (7), and the inner side of the air inlet plate (6) is evenly and densely provided with air outlet holes; The bottom opening of the drying box (5) is connected to the upper end of the cutting part, the bottom of the drying box (5) is slidably connected to a sealing plate (9), the outer side of the sealing plate (9) is connected to a telescopic push rod (8), the outer side of the drying box (5) is symmetrically connected to a plurality of limiting ear plates (11), the lower side of the limiting ear plates (11) is provided with a support frame (10), and a pressure sensor (12) is provided between the support frame (10) and the limiting ear plates (11); The shell of the first crushing part (13), the connecting neck (15) and the shell of the second crushing part (14) are coaxially arranged, a first grinding chamber (17) is provided inside the first crushing part (13), a second grinding chamber (18) is provided inside the second crushing part (14), and the first grinding chamber (17) and the second grinding chamber (18) are connected to the inside of the connecting neck (15); A fixed plate is provided at the top inner side of the shell of the first crushing part (13); a vertical crushing shaft (19) is provided inside the first crushing part (13), the second crushing part (14) and the connecting neck (15); the upper end of the crushing shaft (19) is rotatably connected to the fixed plate, the lower end of the crushing shaft (19) is rotatably connected to the shell of the crushing part, the lower end of the crushing shaft (19) is connected to a crushing motor (28), the upper part of the crushing shaft (19) is fixed with a first grinding roller (20), the lower part of the crushing shaft (19) is fixed with a second grinding roller (21), the first grinding roller (20) is arranged in the first grinding chamber (17), and the second grinding roller (21) is arranged in the second grinding chamber (18); The drying component includes an air uniforming plate (22) and a second air inlet pipe (23), wherein the air uniforming plate (22) is annular and fixed to the lower outer side of the connecting neck (15), and the connecting neck (15) is provided with a plurality of through drying air outlets (24), and an air uniforming cavity is provided inside the air uniforming plate (22), and the air uniforming cavity is connected with the interior of the connecting neck (15) through the drying air outlet (24), and an inclined material baffle plate (25) is provided on the upper side of the drying air outlet (24), and a plurality of material baffle plates (25) are arranged in a circular array along the inner wall of the connecting neck (15).

2. The skeleton crushing device for pet food production according to claim 1, characterized in that: The cutting part comprises a cutting shell (1) and a cutting roller (2), the bottom of the cutting shell (1) is connected to the top of the first crushing part (13), one side of the cutting shell (1) is a vertical surface, and the other side of the cutting shell (1) is an arc surface, the cutting roller (2) is horizontally arranged inside the cutting shell (1), the outer side of the cutting roller (2) is provided with a cutting blade, the blade of the cutting blade is arranged adjacent to the inner side of the vertical surface, and one end of the axis of the cutting roller (2) is connected to a cutting motor.

3. The skeleton crushing device for pet food production according to claim 2, characterized in that: The cutting blades include a plurality of radial blades (3) and a plurality of circumferential blades (4). The plurality of circumferential blades (4) are arranged in an array along the axial direction of the cutting roller (2). The circumferential blades (4) are annular and are arranged coaxially with the cutting roller (2). The length direction of the radial blades (3) is arranged along the length direction of the cutting roller (2). A cutting section (16) is formed between the radial blades (3) and the circumferential blades (4).

4. The skeleton crushing device for pet food production according to claim 1, characterized in that: The lower part of the first grinding chamber (17) and the lower part of the second grinding chamber (18) are converged into a conical surface, the bottom diameter of the first grinding roller (20) is smaller than the bottom opening diameter of the first grinding chamber (17), the maximum diameter of the first grinding roller (20) is smaller than the maximum diameter of the first grinding chamber (17), and the maximum diameter of the first grinding roller (20) is larger than the bottom opening diameter of the first grinding chamber (17); The bottom diameter of the second grinding roller (21) is smaller than the bottom diameter of the second grinding chamber (18), the maximum diameter of the second grinding roller (21) is smaller than the maximum diameter of the second grinding chamber (18), and the maximum diameter of the second grinding roller (21) is larger than the bottom opening diameter of the second grinding chamber (18); The distance between the bottom of the first grinding chamber (17) and the bottom of the first grinding roller (20) is greater than the distance between the bottom of the second grinding chamber (18) and the bottom of the second grinding roller (21).

5. The skeleton crushing device for pet food production according to claim 1, characterized in that: The bottom of the second crushing part (14) is connected to a discharge base (26), and an inclined discharge channel (27) is provided inside the discharge base (26). The upper end of the discharge channel (27) is connected to the bottom of the second grinding chamber (18), and the other end of the discharge channel (27) is connected to the outer side of the discharge base (26). The housing of the crushing motor (28) is fixedly connected to the discharge base (26).

6. A method for using a skeleton crushing device for pet food production, comprising the crushing device according to any one of claims 1 to 5, characterized in that: The following steps are involved: A1. Weighing: The top of the dried portion of the skeleton to be crushed is added to the drying box (5). After the feeding is completed, the pressure sensor (12) monitors the weight of the skeleton. A2. Preliminary drying: Hot air is introduced into the drying box (5) through the first air inlet pipe (7), and the crushed skeleton is dried by the hot air. The weight of the crushed skeleton is monitored at any time by the pressure sensor (12). When the weight of the crushed skeleton drops to an appropriate value, the first air inlet pipe (7) is closed; A3. Cutting: The telescopic push rod (8) drives the sealing plate (9) to be retracted, so that the bottom of the drying box (5) is opened, and the skeleton to be crushed after preliminary drying enters the cutting part. The cutting motor is running, and the cutting motor drives the cutting roller (2) to rotate, and the cutting blade is used to efficiently cut the skeleton to be crushed; A4. Preliminary crushing: The first grinding roller (20) and the second grinding roller (21) are driven to rotate by the crushing motor (28), and the skeleton to be crushed, which has been cut into pieces in step A3, enters the first grinding chamber (17). The skeleton to be crushed is preliminarily crushed by the relative action between the first grinding roller (20) and the first grinding chamber (17). When the particle size of the skeleton to be crushed is smaller than the distance between the first grinding roller (20) and the first grinding chamber (17), the skeleton to be crushed enters the connecting neck (15); A5 secondary drying: hot air is introduced into the connecting neck (15) through the second air inlet pipe (23) and the air plate (22). The broken skeleton after the initial crushing in step A4 enters the connecting neck (15) and is fully exposed to the hot air rising from the bottom; A6. Secondary crushing: After the secondary drying in step A5, the skeleton to be crushed enters the second grinding chamber (18) and is ground by the second grinding roller (21). When the particle size of the skeleton is smaller than the distance between the second grinding roller (21) and the second grinding chamber (18), the crushed skeleton is discharged from the second grinding chamber (18); A7. Discharge: The crushed skeleton is discharged through the discharge channel (27).

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