Feed crushing device for feed production and use method of feed crushing device

Abstract

The invention relates to the field of feed production, discloses a feed crushing device for feed production and a use method of the feed crushing device, and aims to solve the technical problem that heat-sensitive nutritional ingredients are easily lost due to non-uniform feeding and high temperature of a crushing area during operation of an existing feed crushing device. The device comprises a mounting bracket, a crushing shell is fixed on the mounting bracket, the upper end of the crushing shell is integrally connected with a vertical feeding frame, a detachable top cover is mounted at the upper end of the vertical feeding frame, and a feeding device is mounted on the side surface; the hammering and smashing assembly comprises a hammering driving shaft, a hammering rod chuck, a hammering rod and a smashing driving motor, and efficient smashing is achieved through high-speed hammering; the cooling system comprises a hammering abutting rod, a hammering driving shaft center cavity, ventilation holes of a detachable top cover and ventilation fan blades, and multi-dimensional cooperative temperature control is achieved. And the arc-shaped plate realizes integration of crushing and screening. The feed crusher can realize uniform, low-temperature and efficient crushing of feed, protects thermosensitive components such as vitamins, improves the crushing uniformity, simplifies the structure, is convenient to maintain, and is suitable for production of various feeds.

Description

Technical Field

[0001] This invention relates to the field of feed production, specifically to a feed grinding device for feed production and its usage method. Background Technology

[0002] With the rapid development of the feed industry, market demands for feed quality are increasing. Feed not only needs to be uniformly sized after grinding to meet the growth needs of different livestock and poultry (such as poultry and aquatic animals), but also must maintain the activity of heat-sensitive nutrients such as vitamins (such as vitamin C and B vitamins) and enzymes. These components are temperature-sensitive; their activity decreases or they become inactive when the ambient temperature exceeds 35℃, directly affecting the nutritional value of the feed and potentially leading to stunted growth and reduced production performance in livestock and poultry. However, current mainstream feed grinding equipment still suffers from several technical deficiencies in practical applications, making it difficult to simultaneously achieve grinding efficiency, particle size uniformity, and protection of heat-sensitive components. Specific problems are as follows: The feeding structure of existing feed grinding devices mostly adopts a manual tilting type or a simple conveyor belt design. When manually tilting, it is difficult for operators to accurately control the feeding rate, which can easily lead to excessive instantaneous input of raw materials, resulting in the accumulation of raw materials inside the grinding chamber. The raw materials in the accumulation area are squeezed, and some particles are over-crushed into fine powder, while some particles remain coarse because they have not come into contact with the hammering parts, which seriously affects the uniformity of feed particle size. At the same time, the accumulation can also block the discharge channel, prolong the residence time of raw materials in the grinding chamber, further aggravate heat accumulation, and create hidden dangers for the damage of heat-sensitive components.

[0003] The core of most existing grinding devices is a hammer-type structure, driven by a motor to rotate the hammer head at high speed. Grinding is achieved through intense friction between the hammer head and the raw material, the raw material and the inner wall of the grinding shell, and the hammer's striking rod. During this process, a large amount of mechanical energy is converted into heat, causing the temperature inside the grinding shell to rise rapidly. Most devices lack targeted heat dissipation design: some devices only add heat sinks to the outer wall of the grinding shell, relying on heat conduction for external dissipation. However, these heat sinks only act on the surface of the shell and cannot reach the core grinding area that generates heat (such as the contact point between the hammer head and the raw material), resulting in extremely low heat dissipation efficiency. A few devices have built-in ventilation fans, but these fans are mostly installed on the top or side of the grinding shell, with a fixed airflow direction, failing to evenly cover the grinding area, especially the friction surface between the hammer head and the raw material, leading to persistently high local temperatures (reaching over 50°C in some conditions). Under these temperature conditions, the activity of heat-sensitive components such as vitamins and enzymes in the feed rapidly decreases, or even becomes completely inactive. Tests have shown that the retention rate of heat-sensitive components in feed ground by traditional devices is generally low, seriously affecting the nutritional quality of the feed.

[0004] In summary, current feed grinding equipment cannot meet the requirements of modern feed production for high quality, high efficiency, and low loss. Therefore, developing a feed grinding device that can achieve uniform feeding, precise cooling, efficient and uniform grinding, and effectively protect heat-sensitive nutrients has become a key direction for solving the pain points of existing technologies and promoting the high-quality development of the feed industry. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention discloses a feed grinding device for feed production. It aims to solve the technical problems of existing feed grinding devices, such as uneven feeding leading to raw material accumulation and heat generation, weak heat dissipation in the grinding area resulting in the loss of heat-sensitive nutrients, unreasonable design of grinding components affecting efficiency and uniformity, poor structural integration and inconvenient maintenance. Through an innovative integrated design of feeding, grinding, cooling and screening functions, it achieves efficient, uniform, and low-temperature grinding of feed, while ensuring the nutritional quality of the feed.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a feed grinding device for feed production, comprising a mounting bracket, a grinding shell fixedly mounted on the mounting bracket, a discharge port for discharging the ground feed at the bottom end of the grinding shell, an integrated feeding vertical frame at the upper end of the grinding shell, a detachable top cover mounted on the upper end of the feeding vertical frame, and a feeding device for uniform feeding mounted on the side of the feeding vertical frame. The crushing shell is equipped with a hammer crushing component. Several hammering rods are fixedly provided on the top wall inside the crushing shell. An arc plate is fixedly installed on the lower part inside the crushing shell. Several through holes are provided on the arc plate for qualified particle size feed to pass through. The feeding device includes a horizontal feeding frame fixed to the side of the vertical feeding frame. The upper end of the horizontal feeding frame is provided with a feeding port. The horizontal feeding frame is connected to the interior of the vertical feeding frame. Two sets of feeding spiral rollers are rotatably installed on both sides inside the horizontal feeding frame. The central shaft of the feeding spiral roller extends out of the horizontal feeding frame and is fixedly connected to a transmission gear. The transmission gears connected to the two sets of feeding spiral rollers mesh with each other. A feeding drive motor is installed at the bottom of the horizontal feeding frame. The output end of the feeding drive motor is fixedly connected to a drive pulley. The central shaft of one of the two sets of feeding spiral rollers is fixedly connected to a driven pulley. The driven pulley and the drive pulley are connected by a transmission belt. The impact crushing assembly includes an impact drive shaft rotatably mounted inside the crushing housing. An impact rod clamp is fixedly fitted on the outer surface of the impact drive shaft. Several impact rods are fixedly clamped on the outer surface of the impact rod clamp. An impact head is integrally connected to the end of each impact rod. The end of the impact drive shaft extends out of the crushing housing and is fixedly connected to a pulley. A crushing drive motor is mounted on the mounting bracket. A pulley is fixedly connected to the output end of the crushing drive motor. The pulley at the output end of the crushing drive motor is connected to the pulley at the end of the impact drive shaft via a belt. Adjacent striking rods are connected by connecting pipes, and coolant pipes are connected to the ends of the upper and lower striking rods. Coolant is filled in the striking rods and connecting pipes. The striking drive shaft has a central cavity, the striking rod has an inner cavity, and several air outlets are provided on the striking head. The central cavity, inner cavity, and air outlets of the striking drive shaft are connected. An air inlet pipe is fixedly connected to the end of the striking drive shaft.

[0007] Preferably, the feeding port of the horizontal feeding frame is funnel-shaped, and the opening area of ​​the feeding port gradually decreases from top to bottom. The feeding spiral roller is rotatably connected to the horizontal feeding frame through a deep groove ball bearing. The axes of the two sets of feeding spiral rollers are parallel, and the distance between the two sets of feeding spiral rollers is adapted to the size of the feed raw material particles.

[0008] Preferably, the detachable top cover is fixedly connected to the feed vertical frame by bolts. The detachable top cover has symmetrical ventilation holes on both sides. A ventilation fan blade is fixedly installed in the ventilation hole. A filter screen is provided on both the upper and lower sides of the ventilation hole. The ventilation fan blade is placed between the two sets of filter screens. The filter screen is a stainless steel wire mesh.

[0009] Preferably, the hammering rods clamped on the hammering rod clamping plate are provided in four groups, and the four groups of hammering rods are evenly distributed in a ring around the outer periphery of the hammering rod clamping plate, with the included angle between two adjacent groups of hammering rods being °; the four groups of hammering rods are arranged in several rows parallel to each other around the outer periphery of the hammering rod clamping plate, and the four groups of hammering rods in each row are distributed in a cross pattern.

[0010] Preferably, the hammer head includes two types: one type has several longitudinally parallel hammer blades integrally connected to the end of the hammer head, and the other type has several transversely parallel hammer blades integrally connected to the end of the hammer head. The two types of hammer heads are alternately arranged on the same row of hammer rods, and the air outlet is opened between adjacent longitudinal and transverse hammer blades.

[0011] Preferably, the hammer drive shaft is rotatably connected to the crushing shell via a self-aligning roller bearing, and an oil-resistant rubber sealing sleeve is provided between the outer ring of the self-aligning roller bearing and the inner wall of the crushing shell; the end of the air inlet pipe away from the hammer drive shaft is used to connect to an external fan, and the inner cavity of the hammer rod is connected to the air outlet in a one-to-one correspondence.

[0012] Preferably, the hammering rods are provided in five sets, and the five sets of hammering rods are evenly distributed along the circumference of the crushing shell, with the included angle between two adjacent sets of hammering rods being °; the end of the coolant connector away from the hammering rods is used to connect to an external liquid pump and a coolant tank, and the hammering rods and the connecting pipe form a closed coolant circulation channel.

[0013] Preferably, the arc surface of the arc plate faces the impact crushing component, and the arc plate is in contact with the inner wall of the crushing shell; the diameter of the through hole on the arc plate is set according to the target particle size of the feed after crushing, and the arc plate is fixedly connected to the crushing shell by bolts.

[0014] Preferably, the feed drive motor is fixedly connected to the horizontal feed frame by bolts, and the transmission belt is a polyurethane belt; the pulley at the output end of the crushing drive motor is connected to the pulley at the end of the hammer drive shaft by a V-belt, and the bottom of the mounting bracket is provided with support feet, and the bottom of the support feet is fitted with anti-slip pads.

[0015] A method of using a feed grinding device for feed production includes the following steps: Step 1: Check the connection status of each component of the device, the coolant level, and the cleanliness of the filter screen. Set the speed of the feed drive motor and the crushing drive motor according to the type of feed raw materials and the target particle size. Step 2: Start the external liquid pump connected to the coolant pipe, the external fan connected to the air inlet pipe, and the ventilation fan blades on the removable top cover; Step 3: Start the crushing drive motor to drive the hammer drive shaft, hammer rod clamp, hammer rod and hammer head to rotate at high speed and stabilize; Step 4: Start the feed drive motor and put the feed raw materials into the feed inlet of the horizontal feed frame. The raw materials are evenly conveyed to the crushing shell through two sets of feed spiral rollers. The crushing is carried out by the hammer head and the hammer rod. The qualified particle size feed is discharged from the discharge port through the arc plate through the discharge port. Step 5: After the raw materials are fed in, turn off the feeding drive motor, keep the crushing drive motor and cooling and ventilation system running, then stop the machine in sequence, remove the removable top cover to clean the feeding channel and the residue inside the crushing shell, and unclog the through holes of the arc plate.

[0016] Compared with the prior art, the present invention provides a feed grinding device and its method of use for feed production, which has the following beneficial effects: 1. Two sets of synchronously rotating feed screw rollers in opposite directions achieve uniform material delivery, and the feeding rate is precisely matched with the crushing rate, avoiding the accumulation of raw materials in the crushing shell, reducing local frictional heat generation from the source, and ensuring the uniformity of crushing. 2. The multi-dimensional cooling system works synergistically, with coolant circulation carrying away the heat from the hammering rod, precise airflow directly cooling the core friction area, and ventilation assisting to accelerate overall heat dissipation, thus controlling the temperature inside the crushing chamber and improving the retention rate of heat-sensitive components (such as vitamins and enzymes), which is far higher than the average level of existing devices. 3. The cross-distributed hammer rods and alternating longitudinal / transverse hammer blades eliminate grinding dead zones, improve grinding efficiency compared to traditional devices, achieve a high feed particle size qualification rate, eliminate the need for additional screening, and reduce raw material loss; In summary, the feed grinding device of the present invention can be widely used in various feed production and processing fields such as poultry and livestock feed and aquatic feed, taking into account both high-efficiency operation and high-quality output, and providing technical support for the high-quality development of the feed industry. Attached Figure Description

[0017] Figure 1 This is a frontal perspective view of the present invention; Figure 2 This is a three-dimensional structural diagram of the back of the present invention; Figure 3 This is a top-view three-dimensional structural diagram of the present invention; Figure 4 This is a schematic diagram of the detachable top cover structure of the present invention; Figure 5 This is a schematic diagram of the internal structure of the crushing shell of the present invention; Figure 6 This is a three-dimensional structural diagram of the impact crushing component of the present invention; Figure 7 This is a schematic diagram of the longitudinal hammer plate mounting structure of the present invention; Figure 8 This is a schematic diagram of the transverse hammer plate mounting structure of the present invention; Figure 9 This is a schematic diagram of a partial cross-sectional structure of the impact crushing component of the present invention.

[0018] In the diagram: 1. Mounting bracket; 2. Crushing shell; 3. Feed vertical frame; 4. Removable top cover; 5. Feeding device; 6. Crushing drive motor; 7. Horizontal feed frame; 8. Feeding port; 9. Transmission gear; 10. Driven pulley; 11. Transmission belt; 12. Drive pulley; 13. Feeding drive motor; 14. Feeding spiral roller; 15. Hammer rod inner cavity; 16. Ventilation hole; 17. Ventilation fan blade; 18. Hammering rod; 19. Connecting pipe; 20. Coolant pipe; 21. Hammering and crushing assembly; 22. Air inlet pipe; 23. Hammering head; 24. Hammering rod clamp; 25. Hammering rod; 26. Longitudinal hammering plate; 27. Air outlet; 28. Transverse hammering plate; 29. ​​Hammering drive shaft center cavity; 30. Hammering drive shaft. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The core objective of the "feed grinding device for feed production" disclosed in this embodiment is to solve the technical problem that existing feed grinding devices cause excessive damage to heat-sensitive nutrients such as vitamins and enzymes in the feed due to local frictional heat generation inside the grinding shell and the temperature rise caused by raw material accumulation during operation.

[0021] like Figure 1-9 As shown, the basic supporting structure of the device is the mounting bracket 1. This bracket, as the supporting skeleton of the entire device, must have sufficient structural strength to support the weight of the crushing shell 2, the drive motor, and the feed to be crushed, while preventing displacement due to vibration during operation. The mounting bracket 1 is made of high-strength steel using an integral welding process. Its bottom is equipped with support feet that contact the ground, and the bottom of the support feet can be fitted with anti-slip pads to further enhance the stability of the device during operation and prevent the device from shifting due to vibration generated by the high-speed operation of the crushing drive motor 6. The crushing shell 2 is installed on the upper end of the mounting bracket 1 by bolt fastening. The bolt connection ensures the connection stability between the crushing shell 2 and the mounting bracket 1 and facilitates disassembly when it is necessary to maintain or repair the internal components of the crushing shell 2.

[0022] The crushing shell 2, as the core cavity for feed crushing operations, has a cylindrical hollow structure. Its internal space must meet the high-speed rotation requirements of the impact crushing component 21, while providing ample crushing area for the feed. A circular discharge port is located at the bottom of the crushing shell 2. The diameter of the discharge port must match the total flow area of ​​the through holes on the arc-shaped plate to ensure that the crushed feed can be discharged quickly, preventing accumulation at the bottom of the crushing shell 2 and secondary frictional heating. The edge of the discharge port can be equipped with an outward-folding guide edge for easy connection to a feed collection device, reducing feed spillage and waste during discharge. The upper end of the crushing shell 2 is connected to the feed inlet vertical frame 3 via an integrated casting process. Compared to traditional spliced ​​structures, this integrated connection design not only improves the sealing between the crushing shell 2 and the feed inlet vertical frame 3, preventing feed dust generated during crushing from leaking from the connection, but also enhances the overall structural rigidity, preventing loosening of the connection after long-term operation.

[0023] The feed vertical frame 3 has a square hollow structure, and its internal channel is completely connected to the internal cavity of the crushing shell 2, forming a conveying channel for feed to enter the crushing area from the outside. The height of the feed vertical frame 3 needs to be designed according to the installation position of the feed device 5 and the flow characteristics of the feed to ensure that the feed can smoothly enter the crushing shell 2 under the action of gravity, while avoiding feed stagnation inside the feed vertical frame 3. A removable top cover 4 is installed at the upper end of the feed vertical frame 3. The removable top cover 4 is fixedly connected to the upper end face of the feed vertical frame 3 by bolts. The main purpose of this removable design is to facilitate the staff to clean the inside of the feed vertical frame 3 regularly, to prevent feed residue from growing bacteria or mold on the inner wall, which would then contaminate the feed to be crushed later. In addition, when feed blockage occurs inside the feed vertical frame 3, the staff can also quickly clear the blockage by removing the removable top cover 4.

[0024] To ensure uniform feeding of feed ingredients and prevent localized accumulation and temperature rise caused by a large amount of raw materials entering the crushing shell 2 at once, a feeding device 5 is fixedly installed on the side of the feeding vertical frame 3. The core function of this feeding device 5 is to uniformly transport the externally fed feed ingredients to the feeding vertical frame 3 at a set rate, thereby smoothly entering the crushing shell 2 and laying the foundation for subsequent low-temperature crushing. The feeding device 5 includes a horizontal feeding frame 7, which is fixed to the side of the feeding vertical frame 3 by welding. The welding position must ensure that the internal channels of the horizontal feeding frame 7 are completely connected to the internal channels of the feeding vertical frame 3, without obvious protrusions or depressions, to prevent feed from getting stuck and accumulating at the connection. The upper end of the horizontal feeding frame 7 has a feeding port 8, which has a funnel-shaped structure with its opening area gradually decreasing from top to bottom. This design facilitates the feeding of feed ingredients by workers or automated feeding equipment and prevents raw materials from spilling out of the horizontal feeding frame 7 during the feeding process, reducing raw material waste and environmental pollution.

[0025] Two sets of feeding spiral rollers 14 are rotatably mounted on both sides of the horizontal feeding frame 7 via deep groove ball bearings. The bearings are selected to ensure good stability of the feeding spiral rollers 14 during high-speed rotation, while reducing frictional resistance during rotation, thus minimizing energy consumption and component wear. The axes of the two sets of feeding spiral rollers 14 are kept parallel, and the distance between them is designed according to the particle size of common feed ingredients to ensure that the ingredients can be effectively clamped and conveyed by the two sets of spiral rollers, preventing uneven conveying caused by ingredients leaking through the gap between the two sets of spiral rollers. Both ends of the central shaft of the feeding spiral rollers 14 extend beyond the outer side of the horizontal feeding frame 7, and the ends of the extended ends are fixedly connected to transmission gears 9 by key connection. The transmission gears 9 connected to the two sets of feeding spiral rollers 14 mesh with each other. This meshing design allows the two sets of feeding spiral rollers 14 to achieve synchronous counter-rotation. When one set of feeding spiral rollers 14 rotates clockwise, the other set rotates counterclockwise. Through the rotational force in opposite directions, the feed ingredients are pushed towards the vertical feeding frame 3, ensuring the uniformity of ingredient conveying.

[0026] To drive the feed spiral roller 14 to rotate, a feed drive motor 13 is bolted to the bottom of the horizontal feed frame 7. The output end of the feed drive motor 13 is connected to a drive pulley 12 via a key. Simultaneously, the extended end of the central shaft of either of the two sets of feed spiral rollers 14 is also connected to a driven pulley 10 via a key. Power is transmitted between the driven pulley 10 and the drive pulley 12 via a transmission belt 11. Compared to gear transmission, belt drive offers better buffering and shock absorption, effectively absorbing the impact load when the feed drive motor 13 starts, protecting components such as the feed spiral roller 14 and transmission gears 9. Furthermore, if a temporary blockage in the feed material causes a decrease in the speed of the feed spiral roller 14, the transmission belt 11 can slip slightly, preventing overload damage to the motor. In actual operation, after the feed drive motor 13 starts, its output shaft drives the active pulley 12 to rotate. The active pulley 12 transmits power to the driven pulley 10 through the transmission belt 11. The driven pulley 10 drives the feed spiral roller 14 connected to it to rotate. Then, through the meshing transmission gear 9, it drives another set of feed spiral rollers 14 to rotate synchronously in the opposite direction. The rotation direction of the two sets of spiral rollers matches the rotation direction of the spiral blades, so that the feed raw materials in the horizontal feed frame 7 are pushed evenly and stably to the feed vertical frame 3 and finally enter the crushing shell 2. This completely solves the problem of local accumulation and heating caused by uneven feeding of raw materials under the traditional manual feeding method.

[0027] In addition to being easy to clean and maintain, the removable top cover 4 also integrates a structure for ventilation-assisted cooling and dust prevention. Circular ventilation holes 16 are symmetrically arranged on both sides of the removable top cover 4. The axis of the ventilation holes 16 is perpendicular to the surface of the removable top cover 4 and connects to the internal channel of the feed vertical frame 3, ensuring that airflow can enter the feed vertical frame 3 through the ventilation holes 16 and then flow to the crushing shell 2. A ventilation fan blade 17 is fixedly installed in each ventilation hole 16 by a metal bracket. The ventilation fan blade 17 adopts an axial flow fan structure, and its motor is connected to an external power supply. After being powered on, it can rotate at high speed to generate downward airflow. Filter screens are fixedly installed on the upper and lower sides of the ventilation holes 16 by clips. The filter screens are made of stainless steel wire mesh, which has good wear resistance and corrosion resistance. The mesh size is controlled within a small range, which can both prevent dust and impurities in the external air from entering the device and contaminating the feed, and prevent fine feed dust generated during the crushing process from overflowing upwards through the ventilation holes 16, causing air pollution and raw material waste. The ventilation fan blades 17 are positioned precisely between the two filter screens. This design protects the fan blades 17 from impacts by external impurities and prevents impurities from the filter screens, which are rolled up by the rotating blades, from falling into the device. During operation, the downward airflow generated by the high-speed rotation of the ventilation fan blades 17 accelerates air circulation between the feed vertical frame 3 and the crushing shell 2, carrying away the heat generated during crushing and achieving initial cooling. On the other hand, the airflow also exerts a downward thrust on the feed material in the feed vertical frame 3, helping the material to quickly enter the crushing shell 2 and preventing the material from becoming stuck due to friction between particles or adhesion to the inner wall of the feed vertical frame 3, further reducing the risk of the material overheating during transport.

[0028] The core operating component inside the crushing shell 2 is the impact crushing assembly 21. This assembly is crucial for achieving efficient feed crushing, and its structural design directly determines the crushing efficiency, crushing uniformity, and heat generation during operation. The impact crushing assembly 21 includes an impact drive shaft 30, which is rotatably mounted on the two side walls of the crushing shell 2 via two sets of self-aligning roller bearings. The self-aligning roller bearings have good radial and axial load-bearing capacity and can adapt to the vibration and off-center load generated when the impact drive shaft 30 rotates at high speed, ensuring the stability of the shaft rotation. A sealing sleeve is provided between the outer ring of the bearing and the inner wall of the crushing shell 2. The sealing sleeve is made of oil-resistant rubber, which can effectively prevent feed dust generated during the crushing process from entering the bearing and avoid accelerated bearing wear or jamming failure. Several sets of hammer rod clamps 24 are fixedly mounted on the outer surface of the hammer drive shaft 30 by an interference fit. The interference fit ensures that there is no relative sliding between the hammer rod clamps 24 and the hammer drive shaft 30, and that they can rotate synchronously at high speed with the hammer drive shaft 30. Each set of hammer rod clamps 24 is evenly distributed along the axial direction of the hammer drive shaft 30. The distance between two adjacent sets of hammer rod clamps 24 needs to be designed according to the length of the hammer rod 25 and the needs of the feed crushing area to ensure that the feed can be fully hammered in the crushing shell 2 without obvious crushing dead corners.

[0029] The outer circumference of the hammer rod clamping plate 24 is evenly provided with four clamping slots. Each clamping slot is fixedly clamped with a hammer rod 25 by bolts. That is, each set of hammer rod clamping plates 24 is fixedly provided with four sets of hammer rods 25. The four sets of hammer rods 25 are evenly distributed in a ring around the outer periphery of the hammer rod clamping plate 24. The included angle between two adjacent sets of hammer rods 25 is 90°. This distribution method can ensure that when the hammer drive shaft 30 rotates, the hammer rods 25 can act evenly on the feed in each area of ​​the crushing shell 2, and avoid the feed in some areas being insufficiently crushed due to not being hammered for a long time. Meanwhile, four sets of hammering rods 25 are arranged in several rows parallel to each other on the periphery of the hammering rod clamping plate 24, and the four sets of hammering rods 25 in each row are crisscrossed - that is, the position of the hammering rods 25 in the previous row is staggered from the position of the hammering rods 25 in the next row at a certain angle. This crisscrossing design further optimizes the coverage of the crushing area. Even if the feed shifts in position due to airflow or its own gravity during the crushing process, it can be captured and hammered by hammering rods 25 in different rows, completely eliminating crushing dead corners and ensuring that all feed can be crushed evenly.

[0030] The hammer head 23 is connected to the end of the hammer rod 25 via an integrated forging process. This integrated forging ensures the connection strength between the hammer rod 25 and the hammer head 23, preventing the hammer head 23 from detaching during high-speed hammering and causing equipment damage or safety accidents. There are two types of hammer heads 23, which are alternately arranged on the same row of hammer rods 25—one type has several longitudinally parallel hammer blades 26 integrated at the end, and the other type has several transversely parallel hammer blades 28 integrated at the end. Both the longitudinal hammer blades 26 and the transverse hammer blades 28 are made of high-strength wear-resistant alloy material, possessing good impact resistance and wear resistance, and can withstand the wear caused by long-term high-speed hammering of feed. This alternating "vertical + horizontal" pounding blade structure has two major advantages compared to the traditional single-plane pounding head: First, the multi-blade design increases the contact and cutting area between the pounding head 23 and the feed, improving crushing efficiency and enabling the rapid breaking of lumpy feed into fine particles; second, it reduces the contact area of ​​a single pounding point, lowering the friction and heat generated per unit area during the pounding process, effectively controlling the temperature rise in the crushing area, and preventing the destruction of heat-sensitive nutrients.

[0031] To further enhance the cooling effect, several circular air outlets 27 are provided between adjacent longitudinal and transverse impact plates 26 and 28, extending through the thickness of the impact plates to form an airflow channel. Simultaneously, a cylindrical impact drive shaft central cavity 29 is formed along the axial direction inside the impact drive shaft 30, and a cylindrical impact rod inner cavity 15 is formed along the axial direction inside the impact rod 25. The impact drive shaft central cavity 29 and the impact rod inner cavity 15 are interconnected, and the impact rod inner cavity 15 is also connected to the air outlets 27, ultimately forming a complete airflow channel of "air inlet pipe 22 – impact drive shaft central cavity 29 – impact rod inner cavity 15 – air outlet 27". An air inlet pipe 22 is fixedly connected to the end of the impact drive shaft 30 via a flange connection. The other end of the air inlet pipe 22 is connected to an external fan, which can adjust the airflow according to the intensity of the crushing operation. During operation, an external fan pumps high-pressure air into the central cavity 29 of the hammer drive shaft through the air inlet pipe 22. Under pressure, the air enters the inner cavity 15 of each hammer along the central cavity 29 of the hammer drive shaft, and then is ejected at high speed from the air outlet 27. This air acts directly on the friction and crushing surface between the hammer blades and the feed, quickly carrying away the heat generated during the hammer crushing process and achieving precise cooling of the crushing area. At the same time, the high-speed airflow can also blow off the fine feed dust adhering to the surface of the hammer blades, preventing dust accumulation from affecting the crushing efficiency or causing secondary pollution.

[0032] To drive the high-speed rotation of the impact drive shaft 30, a crushing drive motor 6 is bolted to the mounting bracket 1. The crushing drive motor 6 is a three-phase asynchronous motor, characterized by high power, stable speed, and strong overload resistance, providing continuous and stable power to the impact crushing assembly 21. A pulley is keyed to the output end of the crushing drive motor 6, and a pulley is also keyed to the end of the impact drive shaft 30 extending outside the crushing housing 2. Power is transmitted between the two pulleys via a V-belt. The V-belt drive offers high transmission efficiency and low maintenance costs, and provides a certain buffering capacity during load fluctuations, protecting the crushing drive motor 6 and the impact drive shaft 30. In actual operation, after the crushing drive motor 6 starts, its output shaft drives the driving pulley to rotate, transmitting power through the V-belt to the driven pulley on the impact drive shaft 30, thereby driving the impact drive shaft 30 to rotate at high speed. This ultimately achieves the high-speed impact action of the impact rod 25 and the impact head 23, completing the feed crushing operation.

[0033] To further optimize the grinding effect and enhance the cooling capacity, five sets of impact rods 18 are fixedly installed on the inner top wall of the grinding shell 2 by welding. These five sets of impact rods 18 are evenly distributed along the circumference of the grinding shell 2, with an included angle of 72° between adjacent sets. This distribution ensures that the feed can contact impact rods 18 at different positions during the rotating and impacting process, preventing localized overheating caused by constant friction between the feed and impact rods 18 in the same area. Each impact rod 18 has a cylindrical structure, with one end welded to the inner wall of the grinding shell 2 and the other end extending towards the center of the grinding shell 2. The extended end must maintain a certain safety clearance from the impact drive shaft 30 to prevent collision between the impact drive shaft 30 and the impact rod 18 during high-speed rotation. Connecting pipes 19 are welded and fixed between adjacent impact rods 18 via copper tubes. Both the connecting pipes 19 and the impact rods 18 have hollow interiors and are interconnected, forming a closed cooling fluid circulation channel. Among them, the ends of the two sets of hammer rods 18 located at the top and bottom are fixed with coolant pipes 20 by flange connection. One end of the coolant pipe 20 is connected to the internal channel of the hammer rod 18, and the other end extends to the outside of the crushing shell 2 and is connected to the external liquid pump and coolant tank, forming a circulation loop of "coolant tank-liquid pump-coolant pipe 20-hammer rod 18-connecting pipe 19-coolant tank".

[0034] During operation, an external liquid pump is activated, pumping coolant from the coolant tank into the coolant connector 20. The coolant then flows along the connector 20 into the internal channels of the impact rods 18, and subsequently circulates among the five sets of impact rods 18 via the connecting pipe 19. Since the impact rods 18 are in direct contact with the feed during the grinding process, the frictional heat between the feed and the impact rods 18 is transferred to the pipe walls of the impact rods 18 through heat conduction. The circulating coolant absorbs this heat and carries it back to the coolant tank. The heat is then dissipated into the air through the heat dissipation structures within the coolant tank (such as heat sinks and cooling fans), thus continuously cooling the impact rods 18 and further controlling the overall temperature of the grinding area. This coolant circulation cooling method, together with the airflow cooling from the ventilation fan blades 17 and the precise airflow cooling from the air outlet 27, forms a multi-dimensional synergistic cooling system. These three systems work together to ensure that the temperature inside the grinding shell 2 is always controlled within a range that does not damage heat-sensitive nutrients, significantly improving the quality of the ground feed.

[0035] An arc-shaped plate is bolted to the lower part of the crushing shell 2. The arc surface of the plate faces the crushing assembly 21 and fits tightly against the inner wall of the crushing shell 2. This arc design ensures that the crushed feed particles can slide down the arc surface to the discharge port under gravity, avoiding accumulation on the surface of the arc plate. Several circular through holes are provided on the arc plate. The diameter of the through holes needs to be designed according to the target particle size of the crushed feed. For example, for poultry chick feed, the through hole diameter can be designed to be smaller to ensure that the feed particles are small and easily digestible; for fattening pig feed, the through hole diameter can be appropriately increased to balance digestibility and crushing efficiency. During operation, when the feed is crushed to a particle size smaller than the through hole diameter, the particles will pass through the through hole under the combined action of gravity and airflow and fall into the discharge port at the bottom of the crushing shell 2, and finally be discharged from the device. Larger particles that do not reach the target particle size will be blocked by the arc plate and continue to remain in the crushing area. They will be crushed again by the high-speed rotating hammer head 23 until the particle size meets the requirements and is discharged through the through hole. This built-in particle size screening structure integrates crushing and screening functions into one unit, eliminating the need for separate screening equipment. This simplifies the feed production process, reduces equipment investment costs, and avoids secondary contamination and raw material waste during the transfer of feed from crushed feed to screening equipment.

[0036] A method for using a feed grinding device for feed production, the specific steps of which are as follows: Step 1: The first step is the preparation stage before operation. The staff needs to conduct a comprehensive inspection of the device to ensure that all components are firmly connected. Check whether the bolts of the mounting bracket 1 are loose and whether the anti-slip pads of the support feet are intact; check whether the connection between the crushing shell 2 and the feed vertical frame 3 is well sealed and without any dust leakage; check whether the rotation of the feed spiral roller 14 and the hammer drive shaft 30 is flexible and without any jamming; check the tension of the transmission belt 11 and the V-belt. If the belt is too loose, it needs to be adjusted to avoid slippage and insufficient power transmission; check the coolant level in the coolant tank. If the level is lower than the specified mark, coolant needs to be added in time to ensure that the coolant circulation system can work normally; check whether the filter screen in the ventilation hole 16 is clean. If there is a lot of dust or feed dust on the filter screen, it needs to be cleaned or replaced to prevent blockage and affect the ventilation effect. During the preparation stage, the speeds of the feed drive motor 13 and the crushing drive motor 6 need to be adjusted according to the type and target particle size of the feed to be crushed. For feed materials with higher hardness (such as corn and soybean meal), the speed of the crushing drive motor 6 can be appropriately increased to enhance the crushing force. For easily crushed materials (such as bran and grass powder), the speed can be appropriately reduced to reduce energy consumption and heat generation. At the same time, the speed of the feed drive motor 13 should be adjusted according to the speed of the crushing drive motor 6 to ensure that the raw material conveying rate matches the crushing rate and avoid the accumulation of raw materials in the crushing shell 2. Step 2: After preparation, the feeding and crushing stage begins. The operator first starts the external liquid pump, fan, and ventilation fan blades 17 on the removable top cover 4, allowing the coolant circulation system and airflow cooling system to run for 5-10 minutes to establish a low-temperature environment inside the crushing shell 2. Then, the crushing drive motor 6 is started. Once the hammer drive shaft 30 reaches the set speed and rotates stably, the feeding drive motor 13 is started to begin the feeding operation. During feeding, the operator can manually or automatically feed the feed material into the feeding port 8 of the horizontal feeding frame 7. Guided by the feeding port 8, the material enters the horizontal feeding frame 7. At this time, two sets of synchronously rotating counter-rotating feeding spiral rollers 14 evenly push the material into the feeding vertical frame 3. Under the action of gravity and the airflow thrust generated by the ventilation fan blades 17, the material smoothly enters the crushing shell 2. The raw materials entering the crushing shell 2 are immediately pounded by the high-speed rotating hammer head 23—the longitudinal hammer blades 26 and the transverse hammer blades 28 act alternately on the raw materials, cutting and crushing the lumpy raw materials into fine particles. At the same time, the raw materials rub against the hammer rod 18 under the drive of the hammer head 23, further refining the particles. During this process, the coolant circulation system continuously removes frictional heat through the hammer rod 18, and the high-pressure air pumped in by the fan is sprayed out from the air outlet 27, removing the heat generated by the contact between the hammer blades and the raw materials. The airflow generated by the ventilation fan blades 17 accelerates the air circulation inside the crushing shell 2, expelling heat from the outside of the device. The three work together to ensure a stable temperature in the crushing area. Among the crushed feed particles, those that meet the target particle size pass through the through holes in the arc plate and are discharged from the discharge port to the collection device, while those that do not meet the particle size requirements continue to remain in the crushing area until they are fully crushed and discharged. Step 3: After all feed ingredients have been added and the feed particles inside the crushing shell 2 have been mostly discharged, the machine is shut down and cleaned. First, the operator stops the feed drive motor 13, ceasing all feeding into the device. The crushing drive motor 6, liquid pump, blower, and ventilation fan blades 17 continue running for 3-5 minutes to fully crush and discharge any remaining feed particles inside the crushing shell 2, while simultaneously using airflow to blow away any dust adhering to the inside of the device. Then, the operator sequentially shuts down the crushing drive motor 6, blower, ventilation fan blades 17, and liquid pump. Once the device has completely stopped running, the operator removes the removable top cover 4 and uses a high-pressure air gun or soft brush to clean the inside of the vertical feed frame 3 and the horizontal feed frame 7, removing any remaining feed dust and impurities. Simultaneously, the operator checks the through holes on the curved plate for blockages; if blocked, they can be cleared using a thin wire or a special tool. Finally, the operator cleans the collection device below the discharge port, transferring the crushed feed to subsequent processing stages, and cleans the exterior of the device, completing the entire operation.

[0037] During long-term use, staff also need to perform regular maintenance on the equipment, regularly check the wear of the feed screw roller 14, hammer rod 25 and hammer head 23, and replace them in time if the wear is serious; change the coolant regularly to prevent the coolant from deteriorating and affecting the cooling effect; add lubricating oil to each bearing regularly to reduce component wear and extend the service life of the equipment.

[0038] Through the above structural design and operation process, the feed grinding device of this embodiment achieves uniform, efficient, and low-temperature grinding of feed, effectively solving the problem of heat-sensitive nutrients being destroyed by high temperature in existing devices. It has significant practical value and promotion prospects, and can be widely used in the production and processing of various feeds such as poultry and livestock feed and aquatic feed.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A feed grinding device for feed production, characterized in that, Includes a mounting bracket (1), a crushing shell (2) is fixedly mounted on the mounting bracket (1), the bottom of the crushing shell (2) is provided with a discharge port, and the upper end is integrated with the feeding vertical frame (3); The upper end of the feeding vertical frame (3) is equipped with a detachable top cover (4) and the side is equipped with a feeding device (5) for uniform feeding; the crushing shell (2) is equipped with a hammer crushing component (21) and several hammering rods (18) inside, and an arc plate with through holes is installed in the lower part of the inner side. The feeding device (5) includes a horizontal feeding frame (7), two sets of feeding spiral rollers (14) with meshing transmission gears (9) and a feeding drive motor (13). The impact crushing assembly (21) includes an impact drive shaft (30), an impact rod chuck (24), an impact rod (25), and a crushing drive motor (6); The hammering rod (18) is connected to the connecting pipe (19) and the coolant pipe (20). The hammering drive shaft (30) is provided with a hammering drive shaft center cavity (29). The hammering rod (25) is provided with a hammer rod inner cavity (15). The hammering head (23) is provided with an air outlet (27). The hammering drive shaft (30) is connected to the air inlet pipe (22).

2. The feed grinding device for feed production according to claim 1, characterized in that, The feeding port (8) of the horizontal feeding frame (7) is funnel-shaped, and the opening area of ​​the feeding port (8) gradually decreases from top to bottom. The feeding spiral roller (14) is rotatably connected to the horizontal feeding frame (7) through a deep groove ball bearing. The axes of the two sets of feeding spiral rollers (14) are parallel, and the distance between the two sets of feeding spiral rollers (14) is adapted to the size of the feed raw material particles.

3. A feed grinding device for feed production according to claim 1, characterized in that, The detachable top cover (4) is fixedly connected to the feed vertical frame (3) by bolts. The detachable top cover (4) has symmetrical ventilation holes (16) on both sides. Ventilation fan blades (17) are fixedly installed in the ventilation holes (16). Filter screens are provided on both the upper and lower sides of the ventilation holes (16). The ventilation fan blades (17) are placed between the two sets of filter screens. The filter screens are stainless steel wire mesh.

4. A feed grinding device for feed production according to claim 1, characterized in that, The hammer rods (25) clamped on the hammer rod clamping plate (24) are provided in four groups. The four groups of hammer rods (25) are evenly distributed in a ring around the hammer rod clamping plate (24). The included angle between two adjacent groups of hammer rods (25) is 90°. The four groups of hammer rods (25) are arranged in several rows in parallel around the hammer rod clamping plate (24). The four groups of hammer rods (25) in each row are distributed in a cross pattern.

5. A feed grinding device for feed production according to claim 1, characterized in that, The hammer head (23) includes two types. One type of hammer head (23) has several longitudinally parallel hammer blades (26) integrally connected to its end. The other type of hammer head (23) has several transversely parallel hammer blades (28) integrally connected to its end. The two types of hammer heads (23) are alternately arranged on the same row of hammer rods (25). The air outlet (27) is opened between adjacent longitudinal hammer blades (26) and transverse hammer blades (28).

6. A feed grinding device for feed production according to claim 1, characterized in that, The hammer drive shaft (30) is rotatably connected to the crushing shell (2) through a self-aligning roller bearing. An oil-resistant rubber sealing sleeve is provided between the outer ring of the self-aligning roller bearing and the inner wall of the crushing shell (2). The end of the air inlet pipe (22) away from the hammer drive shaft (30) is used to connect to an external fan. The inner cavity (15) of the hammer rod is connected to the air outlet (27) in a one-to-one correspondence.

7. A feed grinding device for feed production according to claim 1, characterized in that, The hammering rod (18) is provided in five sets. The five sets of hammering rods (18) are evenly distributed along the circumference of the crushing shell (2). The end of the coolant pipe (20) away from the hammering rod (18) is used to connect the external liquid pump and the coolant tank. The hammering rod (18) and the connecting pipe (19) form a closed coolant circulation channel.

8. A feed grinding device for feed production according to claim 1, characterized in that, The arc surface of the arc plate faces the impact crushing component (21), and the arc plate is in contact with the inner wall of the crushing shell (2); the diameter of the through hole on the arc plate is set according to the target particle size after the feed is crushed, and the arc plate is fixedly connected to the crushing shell (2) by bolts.

9. A feed grinding device for feed production according to claim 1, characterized in that, The feed drive motor (13) is fixedly connected to the horizontal feed frame (7) by bolts. The output end of the feed drive motor (13) is fixedly connected to the drive pulley (12). The central shaft of one of the two sets of feed spiral rollers (14) is fixedly connected to the driven pulley (10). The driven pulley (10) and the drive pulley (12) are connected by a transmission belt (11).

10. A method of using a feed grinding device for feed production, characterized in that, The feed grinding apparatus for feed production according to any one of claims 1-9 includes the following steps: Step 1: Check the connection status of each component of the device, the coolant level and the cleanliness of the filter screen, and set the speed of the feed drive motor (13) and the crushing drive motor (6) according to the type of feed raw materials and the target particle size; Step 2: Start the external liquid pump connected to the coolant pipe (20), the external fan connected to the air inlet pipe (22), and the ventilation fan blades (17) on the removable top cover (4). Step 3: Start the crushing drive motor (6) to drive the hammer drive shaft (30), hammer rod chuck (24), hammer rod (25) and hammer head (23) to rotate at high speed and stabilize; Step 4: Start the feed drive motor (13) and feed the raw materials from the feed inlet (8) of the horizontal feed frame (7). The raw materials are evenly transported to the crushing shell (2) by two sets of feed spiral rollers (14). The crushing is carried out by the hammer head (23) and the hammer rod (18). The qualified particle size feed is discharged from the discharge port through the arc plate through the through hole. Step 5: After the raw materials are fed, turn off the feed drive motor (13), keep the crushing drive motor (6) and the cooling and ventilation system running, then stop the machine in sequence, remove the removable top cover (4) to clean the feed channel and the residue inside the crushing shell (2), and clear the arc plate through hole.

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