A raw material pretreatment device for feed processing with a multi-stage screening mechanism

Abstract

This utility model discloses a feed processing raw material pretreatment device with a multi-stage screening mechanism, including a machine body. A feed inlet is located at the top of the machine body. A vertically arranged central shaft is rotatably connected inside the machine body. From top to bottom, a first crushing blade, a second crushing blade, and a grinding plate are sequentially arranged on the central shaft. Movable screen frames are provided on the upper sides of both the first and second crushing blades. A linkage mechanism is provided between the two movable screen frames and the machine body. A fixed screen plate is provided on the lower side of the grinding plate. Through holes that mate with the central shaft are opened in the middle of both the movable screen frames and the fixed screen plate. This utility model not only reduces screen clogging but also extends the service life of components, improves the accuracy of particle size control, increases crushing efficiency, and optimizes feed quality.

Description

Technical Field

[0001] This utility model relates to the field of feed processing equipment technology, specifically to a raw material pretreatment device for feed processing with a multi-stage screening mechanism. Background Technology

[0002] Feed is a general term for the food consumed by all domesticated animals. In a narrower sense, feed mainly refers to the food consumed by animals raised in agriculture or animal husbandry. Feed includes more than ten kinds of feed ingredients, such as soybeans, soybean meal, corn, fish meal, amino acids, miscellaneous meals, whey powder, oils, meat and bone meal, grains, and feed additives. Classified by the level of animal nutritional needs met, feed products can be divided into complete compound feed, concentrated feed, and premixed feed.

[0003] In actual feeding, different livestock require different feeds, and the types, sizes, and proportions of raw materials vary. Grinding equipment is needed to pre-process the feed raw materials. Traditionally, feed raw material screening and grinding are carried out separately. Screened raw materials may cause secondary pollution during the feeding process, affecting feed quality. In addition, problems such as clogging of screen holes may occur during the grinding and screening process, affecting the efficiency of pre-processing. To address these issues, we provide a feed processing raw material pre-processing device with a multi-stage screening mechanism. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides a feed processing raw material pretreatment device with a multi-stage screening mechanism. It utilizes the weight of the raw materials themselves and the process flow, and works in conjunction with a linkage mechanism to crush and screen the raw materials, reducing equipment wear and improving crushing efficiency. It also uses the weight of the raw materials to compress the corrugated pipe, and the gaps allow for the cleaning of the screen holes on the fixed screen plate, reducing clogging and improving the efficiency of pretreatment.

[0005] To achieve the above objectives, this utility model employs a feed processing raw material pretreatment device with a multi-stage screening mechanism, comprising a machine body. A feed inlet is located at the top of the machine body. A vertically arranged central shaft is rotatably connected inside the machine body. From top to bottom, a first crushing blade, a second crushing blade, and a grinding plate are sequentially arranged on the central shaft. Movable screen frames are provided above the first and second crushing blades. A linkage mechanism is provided between the two movable screen frames and the machine body. A fixed screen plate is provided below the grinding plate. Both the frame and the fixed sieve plate have through holes in the middle that mate with the central shaft. The upper side of the grinding plate has a corrugated pipe with a pressure plate at the top. The bottom surface of the corrugated pipe is connected to a partition plate through multiple elastic components. The bottom of the partition plate has an air outlet along the diameter direction. Each air outlet is connected to an air pipe. Each air pipe is connected to a cleaning pipe. The upper part of the cleaning pipe is fitted with a spring and connected to the grinding plate through the spring. The bottom diameter of the cleaning pipe is smaller than the diameter of the screening hole on the fixed sieve plate. The cleaning pipe has an axial ventilation hole.

[0006] Preferably, the first and second crushing blades have the same outline structure as the lower movable screen frame, and both the first and second crushing blades are provided with an extension rod at their outer ends, with a vibrating ball at the end of the extension rod.

[0007] Preferably, the diameter of the screening holes on the two movable screen frames and the fixed screen plate decreases progressively from top to bottom.

[0008] Preferably, the bottom end of the cleaning tube is spherical, and an air inlet is provided at the lower part of the central shaft. The air inlet is connected to the air cavity formed by the pressure plate, the corrugated pipe and the partition plate, and a one-way valve is provided in both the air inlet and the vent hole in the cleaning tube.

[0009] Preferably, the two movable sieve frames are cylindrical screening frames with no mesh on their side plates, and the fixed sieve plate is inverted conical.

[0010] Preferably, the linkage mechanism includes an upper pulley and a lower pulley installed on the inner wall of the machine body. A steel wire rope is wound between the upper pulley and the lower pulley. One side of the steel wire rope is fixedly connected to two movable screen frames, and a movable block is provided on the other side. Limit blocks are provided on both the upper and lower sides of the movable block. The limit block has a through hole that cooperates with the steel wire rope, and one end is fixed to the inner wall of the machine body.

[0011] Preferably, both sides of the two movable screen frames are provided with mounting ears connected to the wire rope, and the bottom of each frame is provided with an inverted conical guide plate.

[0012] Preferably, a drive motor is installed on the top of the machine body, and a discharge port is opened at the bottom. The output shaft of the drive motor is fixedly connected to the central shaft.

[0013] The feed processing raw material pretreatment device with a multi-stage screening mechanism of this utility model has the following beneficial effects:

[0014] This utility model discloses a feed processing raw material pretreatment device with a multi-stage screening mechanism. The three-stage screening structure enables fine pretreatment of feed raw materials by first crushing and then grinding, which helps subsequent feed processing, improves work efficiency, enhances the accuracy of particle size control, and optimizes feed quality.

[0015] This utility model discloses a feed processing raw material pretreatment device with a multi-stage screening mechanism. The first two stages of screening are for crushing and screening the raw materials. Through the setting of the linkage mechanism, the distance between the two movable screen frames set above and below and the crushing blades can be flexibly adjusted, thereby realizing longitudinal moving crushing of feed raw materials. This not only appropriately places the crushing position of the first and second crushing blades on the upper layer of the raw materials, reducing repeated crushing and improving work efficiency, but also reduces the rotational resistance of the central shaft and crushing components, extending the service life of the parts.

[0016] This utility model discloses a feed processing raw material pretreatment device with a multi-stage screening mechanism. The ends of the first and second crushing blades are equipped with vibrating balls, which can increase the flow of raw materials in the movable screen frame and increase the vibration of the bottom screen to avoid clogging of the mesh.

[0017] This utility model discloses a feed processing raw material pretreatment device with a multi-stage screening mechanism. The feed screened by two movable screen frames falls between a grinding plate and a fixed screen plate. The distance between the grinding plate and the fixed screen plate is fixed, which can deeply grind small particles of feed. During the grinding process, the feed above falls onto the pressure plate and compresses the corrugated pipe. During the compression process, air is squeezed into the air pipe and cleaning pipe to clean the screen holes on the fixed screen plate and prevent the screen holes from clogging. Finally, the qualified ground particles are discharged through the discharge port to avoid screen hole clogging.

[0018] Referring to the following description and accompanying drawings, specific embodiments of the present invention are disclosed in detail, indicating how the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope as a result, and the embodiments of the present invention include many changes, modifications and equivalents. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a top view of the movable screen frame and its connecting structure in this utility model;

[0021] Figure 3 for Figure 2 Enlarged view of point A in the image;

[0022] Figure 4 This is a side view of the linkage mechanism in this utility model;

[0023] Figure 5 This is a schematic diagram of the connection structure between the grinding plate and the cleaning tube in this utility model.

[0024] In the diagram: 1. Machine body; 2. Feed inlet; 3. Central shaft; 4. First crushing blade; 5. Second crushing blade; 6. Grinding plate; 7. Movable screen frame; 8. Linkage mechanism; 81. Upper pulley; 82. Lower pulley; 83. Steel wire rope; 84. Movable block; 85. Limiting block; 9. Fixed screen plate; 10. Corrugated pipe; 11. Pressure plate; 12. Partition plate; 13. Air pipe; 14. Cleaning pipe; 15. Extension rod; 16. Vibrating ball; 17. Mounting ear; 18. Drive motor; 19. Discharge port; 20. Guide plate; 21. Air inlet. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope.

[0026] Please refer to the instruction manual appendix. Figure 1-5 This utility model provides a technical solution: a feed processing raw material pretreatment device with a multi-stage screening mechanism, including a body 1, a feed inlet 2 at the top of the body 1, a vertically arranged central shaft 3 rotatably connected inside the body 1, a first crushing blade 4, a second crushing blade 5, and a grinding plate 6 arranged sequentially from top to bottom on the central shaft 3, a movable screen frame 7 on the upper side of both the first crushing blade 4 and the second crushing blade 5, a linkage mechanism 8 between the two movable screen frames 7 and the body 1, and a fixed screen plate 9 on the lower side of the grinding plate 6. Both the movable sieve frame 7 and the fixed sieve plate 9 have through holes in the middle that mate with the central shaft 3. The upper side of the grinding plate 6 has a corrugated pipe 10 with a pressure plate 11 on its top. The bottom surface of the corrugated pipe 10 is connected to a partition plate 12 by multiple elastic components. The bottom of the partition plate 12 has an air outlet along the diameter direction. Each air outlet is connected to an air pipe 13. Each air pipe 13 is connected to a cleaning pipe 14. The upper part of the cleaning pipe 14 is fitted with a spring and is connected to the grinding plate 6 through the spring. The bottom diameter of the cleaning pipe 14 is smaller than the diameter of the screening hole on the fixed sieve plate 9.

[0027] Reference Figure 1The first crushing blade 4 and the second crushing blade 5 have the same outline structure as the lower movable screen frame 7. The outer ends of the first crushing blade 4 and the second crushing blade 5 are provided with extension rods 15, and the ends of the extension rods 15 are provided with vibrating balls 16. During the grinding and screening process, as the extension rods 15 rotate, the vibrating balls 16 strike the movable screen frame 7, thereby vibrating the bottom of the screen frame to prevent the screen holes from clogging. When the distance between the extension rods 15 and the screen frame increases, it plays a role in stirring the feed particles, preventing the feed from clumping due to moisture and other issues, and also increasing the flow of feed particles, thereby improving the efficiency of grinding and screening.

[0028] Reference Figure 1 The two movable screen frames 7 and the fixed screen plate 9 are arranged in a top-to-bottom order, with the diameter of the screening holes on them decreasing step by step; thus realizing the step-by-step grinding and screening of feed raw materials.

[0029] Reference Figure 1 and 5 The bottom end of the cleaning pipe 14 is spherical. The spherical shape is designed to prevent the cleaning pipe 14 from getting stuck between itself and the screen holes. An air inlet 21 is provided at the lower part of the central shaft 3. The air inlet 21 is connected to the air chamber formed by the pressure plate 11, the corrugated pipe 10 and the partition plate 12. One-way valves are provided in both the air inlet 21 and the air vent in the cleaning pipe 14 to ensure balanced air pressure flow and prevent feed from entering the cleaning pipe 14 in reverse.

[0030] Reference Figure 1 The two movable screen frames 7 are cylindrical screening frames with no mesh on their side plates to prevent feed from leaking out. The fixed screen plate 9 is an inverted conical screening plate to increase the grinding area and improve grinding efficiency.

[0031] Reference Figure 1 , 3 4. The linkage mechanism 8 includes an upper pulley 81 and a lower pulley 82 installed on the inner wall of the machine body 1. A steel wire rope 83 is wound between the upper pulley 81 and the lower pulley 82. One side of the steel wire rope 83 is fixedly connected to two movable screen frames 7, and a movable block 84 is provided on the other side. Limiting blocks 85 are provided on both the upper and lower sides of the movable block 84. The limiting block 85 has a through hole that cooperates with the steel wire rope 83, and one end is fixed to the inner wall of the machine body 1. The linkage mechanism 8 is used to realize the up-and-down reciprocating linkage of the two movable screen frames 7.

[0032] Reference Figure 1 and 4Both sides of the two movable screen frames 7 are provided with mounting ears 17 connected to the wire rope 83, and the bottom of each frame is provided with an inverted conical guide plate 20 to reduce the falling range of the feed particles. The guide plate 20 at the bottom of the upper movable screen frame 7 specifically guides the feed particles to slide down to the middle of the lower movable screen frame 7, preventing the particles from falling to the outside of the frame. The guide plate 20 at the bottom of the lower movable screen frame 7 guides the feed particles to fall down to the middle of the pressure plate 11, which squeezes the corrugated pipe 10 under the pressure plate 11. The weight of the feed naturally cleans the screen holes and prevents the screen holes from clogging.

[0033] Reference Figure 1 The top of the machine body 1 is equipped with a drive motor 18, and the bottom is provided with a discharge port 19. The output shaft of the drive motor 18 is fixedly connected to the central shaft 3, which provides power drive for the central shaft 3.

[0034] This embodiment provides a feed processing raw material pretreatment device with a multi-stage screening mechanism, the operation of which is as follows:

[0035] During operation, the drive motor 18 is started, and the central shaft 3 rotates the first crushing blade 4, the second crushing blade 5, and the grinding plate 6, feeding the untreated feed material into the machine body 1 through the feed inlet 2. The feed material first enters the upper movable screen frame 7, where the first crushing blade 4 crushes the feed material. During the crushing process, the material continuously falls through the screen holes into the lower movable screen frame 7. Due to the falling of the feed material, the weight of the feed in the two movable screen frames 7 changes. As the feed gradually falls, the total weight on the upper side decreases. With the cooperation of the linkage mechanism 8, the wire rope 83 raises the upper movable screen frame 7, and the distance between it and the first crushing blade 4 gradually decreases. The first crushing blade 4 crushes the material in the frame from top to bottom, while the distance between the lower movable screen frame 7 and the second crushing blade 4 gradually increases, crushing the material in the frame from bottom to top. In the above process, due to the first-stage screening process... In the first stage, the initial thickness of the raw material is relatively large. Crushing from top to bottom can reduce the resistance encountered by the central shaft 3 during rotation, extend the working life of the rotating parts, and improve the crushing efficiency. In the second stage of screening, the initial thickness is zero, and the distance between the second crushing blade 5 and the bottom surface of the lower movable screen frame 7 gradually increases, with the same effect as above. The two screen frames work together through the linkage mechanism 8, which effectively improves the crushing efficiency and extends the service life of the equipment. The feed after being screened by the two movable screen frames 7 falls between the grinding plate 6 and the fixed screen plate 9. The distance between the grinding plate 6 and the fixed screen plate 9 is fixed, which can deeply grind small particles of feed. During the grinding process, the feed above falls onto the pressure plate 11 and compresses the corrugated pipe 10. During the compression process, the compressed air enters the air pipe 13 and the cleaning pipe 14 to clean the screen holes on the fixed screen plate 9 and prevent the screen holes from clogging. Finally, the qualified particles are discharged through the discharge port 19 to avoid screen hole clogging.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A feed processing raw material pretreatment device with a multi-stage screening mechanism, characterized in that, The machine includes a body (1), with a feed inlet (2) at the top. A vertically arranged central shaft (3) is rotatably connected inside the body (1). A first crushing blade (4), a second crushing blade (5), and a grinding plate (6) are arranged sequentially from top to bottom on the central shaft (3). Movable screen frames (7) are provided on the upper side of both the first crushing blade (4) and the second crushing blade (5). A linkage mechanism (8) is provided between the two movable screen frames (7) and the body (1). A fixed screen plate (9) is provided on the lower side of the grinding plate (6). The middle of both the movable screen frames (7) and the fixed screen plate (9) is provided with a connection to the central shaft (3). The corrugated pipe (10) on the upper side of the grinding plate (6) has a corresponding through hole. The top of the corrugated pipe (10) is provided with a pressure plate (11), and its bottom surface is connected to a partition (12) through multiple elastic components. The bottom of the partition (12) is provided with an air outlet along the diameter direction. Each air outlet is connected to an air pipe (13). Each air pipe (13) is connected to a cleaning pipe (14). The upper part of the cleaning pipe (14) is fitted with a spring and is connected to the grinding plate (6) through the spring. The bottom diameter of the cleaning pipe (14) is smaller than the diameter of the screening hole on the fixed sieve plate (9). An axial ventilation hole is provided inside the cleaning pipe (14).

2. The feed processing raw material pretreatment device with a multi-stage screening mechanism according to claim 1, characterized in that: The first crushing blade (4) and the second crushing blade (5) have the same outline structure as the lower movable screen frame (7). The outer ends of the first crushing blade (4) and the second crushing blade (5) are provided with extension rods (15), and the ends of the extension rods (15) are provided with vibrating balls (16).

3. The feed processing raw material pretreatment device with a multi-stage screening mechanism according to claim 1, characterized in that: The two movable sieve frames (7) and the fixed sieve plate (9) are arranged in a top-to-bottom order, with the diameter of the screening holes decreasing step by step.

4. A feed processing raw material pretreatment device with a multi-stage screening mechanism according to claim 1, characterized in that: The bottom end of the cleaning pipe (14) is spherical, and the lower part of the central shaft (3) is provided with an air inlet (21). The air inlet (21) is connected to the air cavity formed by the pressure plate (11), the bellows (10) and the partition (12). Both the air inlet (21) and the air vent in the cleaning pipe (14) are provided with one-way valves.

5. A feed processing raw material pretreatment device with a multi-stage screening mechanism according to claim 1, characterized in that: The two movable sieve frames (7) are cylindrical screening frames with no sieve holes on their side plates, and the fixed sieve plate (9) is an inverted conical plate-shaped sieve plate.

6. A feed processing raw material pretreatment device with a multi-stage screening mechanism according to claim 1, characterized in that: The linkage mechanism (8) includes an upper pulley (81) and a lower pulley (82) installed on the inner wall of the machine body (1). A steel wire rope (83) is wound between the upper pulley (81) and the lower pulley (82). One side of the steel wire rope (83) is fixedly connected to two movable screen frames (7), and a movable block (84) is provided on the other side. Limit blocks (85) are provided on both the upper and lower sides of the movable block (84). The limit block (85) has a through hole that matches the steel wire rope (83), and one end is fixed on the inner wall of the machine body (1).

7. A feed processing raw material pretreatment device with a multi-stage screening mechanism according to claim 6, characterized in that: Both sides of the two movable screen frames (7) are provided with mounting ears (17) connected to the wire rope (83), and the bottom of each frame is provided with an inverted conical guide plate (20).

8. A feed processing raw material pretreatment device with a multi-stage screening mechanism according to claim 1, characterized in that: The top of the machine body (1) is equipped with a drive motor (18) and the bottom is provided with a discharge port (19). The output shaft of the drive motor (18) is fixedly connected to the central shaft (3).

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