Slow release type calf early rumen stimulation feed processing device

Abstract

The utility model discloses a slow-release type calf early-stage rumen stimulation feed processing device which is characterized in that different mixed raw materials are pushed into a double-layer extrusion die assembly through a first spiral extrusion device and a second spiral extrusion device to be extruded into a double-layer extrusion die to form a double-layer feed rod, and the double-layer feed rod is accurately cut into uniform particles through a cutting assembly. And then conveying to the next link by the conveying device. The double-layer extrusion die comprises an inner-layer die, an outer-layer die and a transition connecting device, the first spiral device is connected with the inner-layer die, the normal release type mixed matching raw materials are added to extrude the inner layer of feed particles, and the second spiral device and the outer-layer die are connected through the transition connecting device. The outer layer with the feed particles is extruded by adding the slow release type mixed proportioning raw materials, and the double-layer feed particles release nutrients in the rumen of the calves in sequence, so that long-time continuous supply is ensured, the early growth requirements of the calves are met, the feed utilization rate is increased, and waste caused by too fast release of the nutrients is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of special feed processing, in particular to a slow-release calf early rumen stimulation feed processing device. Background Art

[0002] In early life, calves' rumens are not yet developed, and they obtain nutrients from breast milk or liquid milk replacer. Modern intensive farming practices early weaning to help calves adapt to solid feeds earlier, promote rumen development, reduce milk consumption and feeding costs, and improve farming efficiency. The rumen of a newborn calf is a cavity much smaller than the abomasum and serves no functional purpose. As the calf ages, increased feed intake stimulates rapid rumen development, and subsequently, the reticulum. However, selecting feed ingredients with varying fermentation rates improves nutrient utilization, reduces feed waste, and allows for the gradual release of nutrients such as vitamins, minerals, and amino acids in the rumen, ensuring the animal receives the nutrients it needs over a longer period of time. This also provides a frictional effect, promoting digestion and absorption, and continuously stimulating the development of the rumen papilla.

[0003] Early feed processing technologies typically used single ingredients or simple mixed pelleting. While these methods could provide basic nutrition, they failed to achieve sustained nutrient release and continuous rumen stimulation. Another common method was to use a simple mixed feed, mixing different ingredients together and then pelletizing the feed through a pelletizer. At the same time, pressure and other methods were used to increase the hardness of the pelleted feed, but this method also had problems. Although the nutritional composition of the mixed feed was balanced, the inability to intervene and control the dissolution of the feed in the rumen resulted in nutrient release that was too fast or too slow, making it unable to continuously meet the needs of calf rumen development.

[0004] For example, Chinese patent CN211436120U discloses a pellet feed extrusion granulation device, which includes a base component, an extrusion component, and a cutting component. By providing a sudden change thread groove on the outer surface of the extrusion screw, the feed material to be processed is transported, extruded, and formed in one direction along the thread ridges on the extrusion screw. As the thread becomes narrower and shallower, the pressure of the sudden change thread groove on the feed material to be processed gradually increases, ensuring that the binding force of the feed after pelletization is relatively strong. Although this technology can increase the hardness value of the feed after pelletization and indirectly achieve a short and slow release of the pelletized feed in the rumen, it cannot achieve the effect of intervening in the dissolution of the feed in the rumen, resulting in random release of nutrients and waste, reducing the utilization rate of the nutrients in the feed, and failing to achieve the gradual and slow release of nutrients in the rumen. At the same time, due to the different digestive abilities of calves from 1 to 6 months of age, a single pellet feed cannot meet the different needs of calves in their early growth.

[0005] In order to solve the above problems, it is necessary to develop a slow-release calf early rumen stimulation feed processing device. The processed feed pellets can slowly release nutrients in a predetermined order, thereby providing continuous nutritional support. In response to the needs of calves in different growth cycles, diverse pellet feeds can be developed to effectively stimulate the development of rumen papillae. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a slow-release calf early rumen stimulation feed processing device, which can release feed particles of nutritional ingredients layer by layer in a predetermined order, so that the feed particles can continuously provide nutritional support in the calf's early rumen, and provide a variety of feed particles to meet the different needs of calves in their early growth, and effectively stimulate the development of rumen papillae;

[0007] To address the aforementioned issues, the present application discloses a slow-release, early-stage rumen-stimulating feed processing device for calves. Different mixed raw materials are pushed through first and second screw extruders, respectively, and simultaneously pushed into a double-layer extrusion die to extrude double-layer feed rods. A discharge cutting assembly is fixed to the end of the double-layer extrusion die, which precisely cuts the double-layer feed rods into uniform double-layer feed pellets. These pellets are then collected by a conveyor and transported to the next stage of processing, such as cooling, drying, or packaging.

[0008] In order to enable the mold to extrude inner and outer layers of double-layer feed pellets at the same time, the double-layer extrusion mold includes an inner layer extrusion mold, an outer layer extrusion mold, and a transition connection device. The inner layer extrusion mold is fixedly connected to the axial rear end of the outer layer extrusion mold and is connected to the discharge port of the first spiral extrusion device; the outer layer extrusion mold is connected to the discharge port of the second spiral extrusion device through the transition connection device.

[0009] In order to achieve a sustained-release effect in double-layer feed pellets, a first spiral extrusion device is arranged in the axial direction of the double-layer extrusion die. The device includes a first feed port, and normal-release mixed raw materials are added through the first feed port. The inner layer of the double-layer feed pellets with a sustained-release effect is extruded through the inner layer extrusion die.

[0010] In order to achieve a sustained-release effect in the double-layer feed pellets, a second spiral extrusion device is arranged in a direction perpendicular to the axis of the double-layer extrusion die. The device includes a second feed port. By adding a slow-release mixed ratio raw material at the second feed port, the outer layer of the double-layer feed pellets with a sustained-release effect is extruded through the outer layer extrusion die.

[0011] Furthermore, in order to ensure that the mixed raw materials of the inner and outer layers can be extruded into the double-layer extrusion die evenly and smoothly, the inner extrusion die is provided with a flange for fixedly connecting the discharge port of the first spiral extrusion device, and there is a certain gap between the inner side of the outer extrusion die and the outer side of the inner extrusion die, and a feed hole flange is provided in the axial vertical direction for fixedly connecting the transition connection device. The connection method ensures a close fit between the molds and a smooth flow of raw materials; the inner side of the transition connection device and the inner side of the inner extrusion die and the inner side of the outer extrusion die are all conical cavities, and their surfaces are smooth and have a specific curvature to guide the raw materials to be squeezed in smoothly. The conical cavity not only helps to form a uniform double-layer structure, but also improves the stability of the double-layer feed pellets.

[0012] Furthermore, in order to adjust the thickness of the inner and outer layers of the double-layer feed pellets to meet the needs of calves at different growth stages, the inner layer extrusion die and the outer layer extrusion die can be set with multiple specifications and models. The inner layer extrusion dies of different specifications and models are combined with each other, which not only realizes the versatility and practicality of the entire mold, but also realizes the replaceability and maintainability between the molds. The combined molds are used to make double-layer feed pellets with different inner and outer layer thicknesses.

[0013] Furthermore, in order to meet the digestive capacity and nutritional needs of calves in different early growth cycles, double-layer feed pellets are made by adjusting the inner layer extrusion die and the outer layer extrusion die combination of different specifications and models, including the outer normal release layer and the inner slow release layer. The double-layer feed pellets with different thicknesses of the normal release layer and the slow release layer can be precisely controlled, so that the double-layer feed pellets can better adapt to the nutritional needs of calves in different production cycles of 1-6 months in the early stage.

[0014] Furthermore, in order to stimulate the early development of the rumen in calves, by adjusting the inner layer extrusion die and the outer layer extrusion die of different specifications and models, and setting different shapes of the extrusion ports, the inner layer extrusion die and the outer layer extrusion die with different shapes of extrusion ports can be combined with each other to produce double-layer feed pellets with different inner and outer layer shapes, thereby improving the diversity of feed. The diverse feeds mixed together can provide different physical stimulations, which are conducive to the peristalsis and development of the rumen.

[0015] Furthermore, in order to achieve more stable and precise processing of double-layer feed pellets, the first spiral extrusion device and the second spiral extrusion device are respectively arranged in parallel on the fixed frame, and are driven by independent driving devices respectively. By adjusting the discharge speed ratio of the two sets of spiral extrusion devices, the stability and accuracy of the combination of inner layer extrusion molds and outer layer extrusion molds of different specifications can be better adapted. The two sets of driving devices are electrically connected to other control units to control different speeds. The driving device includes a variable frequency motor, a reduction gear box, and a transmission sprocket group, which can provide sufficient torque for the spiral extrusion device to further achieve the stability of the device. At the same time, the fixed frame is an assembled structure, which can adapt to the installation in different installation scenarios.

[0016] Furthermore, in order to achieve rapid cutting of double-layer feed pellets, the discharge cutting assembly includes a fixed seat, a cutter, and a motor, wherein the cutter is a cross-shaped scraper structure, the center of which is offset from the axis direction of the double-layer extrusion die and is arranged outside the outer diameter of the discharge port of the double-layer extrusion die, and its end face is attached to the end face of the double-layer extrusion die assembly.

[0017] Furthermore, in order to achieve more precise cutting of the length of double-layer feed pellets, the motor of the discharge cutting assembly is of variable frequency type, which can control different speeds and can be electrically connected to the control unit. By controlling the rotation speed of the motor, the length of the cylindrical feed pellets can be controlled to meet the different needs of calves' early growth.

[0018] The technical effects of the utility model are:

[0019] 1. This device uses a dual-layer extrusion die to create a two-layer feed pellet structure. The inner and outer layers utilize different raw material mixes and ratios, each with normal-release and slow-release properties. The inner layer, extruded by a first screw extruder, contains slow-release nutrients; the outer layer, extruded by a second screw extruder, contains normal-release nutrients. This allows the double-layer feed pellets to release nutrients layer by layer in a predetermined sequence in the calf's rumen, ensuring a continuous supply of nutrients over an extended period. This meets the calf's sustained nutritional needs during early growth, improves feed utilization, and avoids the phenomenon of premature nutrient release, which can lead to some nutrients being excreted before they are fully absorbed.

[0020] 2. This device uses an adjustable double-layer extrusion die to produce double-layer feed pellets with varying inner and outer layer thicknesses and shapes. By replacing the inner and outer layer extrusion dies with different specifications and models, the thickness of the inner and outer layers of the feed pellets can be adjusted, precisely controlling the rate and duration of nutrient release to meet the nutritional needs of calves at different growth stages from 1 to 6 months of age. In addition, the diverse design of the die extrusion port shape gives the feed pellets different physical shapes. The mixed, diverse feed pellets produce different physical stimulations on the rumen wall, helping to enhance rumen motility, promote the development of rumen papillae, and improve the calf's digestion and absorption capacity. At the same time, the multiple specifications and models of the die can be combined as needed, which not only achieves the versatility and practicality of the die as a whole, but also improves the replaceability and maintainability of the die.

[0021] 3. This device utilizes independent drive systems. The first and second spiral extruders are each driven by a variable frequency motor. These motors are electrically connected to other control units, enabling automated and precise control of their respective discharge speeds and ratios. This ensures stable extrusion of the inner and outer layers, improving the stability and accuracy of double-layer feed pellet processing. The discharge cutting assembly features a cross-shaped scraper structure. Combined with the variable frequency motor, it precisely cuts feed pellets to meet the varying digestive needs of calves at different growth stages, further enhancing processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of a slow-release calf early rumen stimulation feed processing device provided in an embodiment of the present application;

[0023] Figure 2 This is an enlarged schematic diagram of a double-layer extrusion die of a slow-release calf early rumen stimulation feed processing device provided in an embodiment of the present application;

[0024] Figure 3 This is a top view of a slow-release calf early rumen stimulation feed processing device provided in an embodiment of the present application;

[0025] Figure 4 Schematic cross-sectional view of a double-layer extrusion die provided in an embodiment of the present application;

[0026] Figure 5 Schematic cross-section of a double-layer feed pellet provided in an embodiment of the present application;

[0027] In the picture:

[0028] 1. First screw extruder; 11. First feed port;

[0029] 2. Second spiral extruder; 21. Second feed port;

[0030] 3. Double-layer extrusion die; 31. Inner layer extrusion die; 311. Flange; 32. Outer layer extrusion die; 321. Feed hole flange; 33. Transition connection device;

[0031] 4. Discharging and cutting assembly; 41. Fixing seat; 42. Cutter; 43. Motor;

[0032] 5. Conveying device;

[0033] 6. Double-layer feed pellets; 61. Normal release layer; 62. Slow release layer;

[0034] 7. Fixed frame;

[0035] 8. Driving device; 81. AC motor; 82. Reducer; 83. Drive sprocket assembly; DETAILED DESCRIPTION

[0036] The following will be combined with the Figures 1 to 5 The following embodiments of the technical solution of the present application are described in detail. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only used as examples and are not intended to limit the scope of protection of the present application.

[0037] Example 1

[0038] like Figures 1-3 The overall structure of a slow-release, early-stage rumen-stimulating feed processing device for calves is illustrated. The device pushes different mixed raw materials through a first screw extruder 1 and a second screw extruder 2, and simultaneously pushes them into a double-layer extrusion die 3 assembly to extrude double-layer feed sticks. A discharge cutting assembly 4 is fixed to the end of the double-layer extrusion die 3. This discharge cutting assembly 4 precisely cuts the double-layer feed sticks into uniform double-layer feed pellets 6. These pellets are then collected by a conveyor 5 and transported to the next stage of processing, such as cooling, drying, or packaging.

[0039] The double-layer extrusion die is key to achieving the device's sustained-release effect. The double-layer extrusion die 3 comprises an inner extrusion die 31, an outer extrusion die 32, and a transition connection device 33. The inner extrusion die 31 is fixedly connected to the axial rear end of the outer extrusion die 32 and connected to the discharge port of the first screw extrusion device 1. The outer extrusion die 32 is connected to the discharge port of the second screw extrusion device 2 via the transition connection device 33. The double-layer extrusion die structure ensures the simultaneous extrusion of the inner and outer layers of feed pellets, forming a double-layer structure with a sustained-release effect.

[0040] The first spiral extrusion device 1 is arranged in the axial direction of the double-layer extrusion die 3 component. The device includes a first feed port 11. Normal release type mixed raw materials are added through the first feed port 11, and the inner layer of the double-layer feed particles 6 with sustained release effect is extruded through the inner layer extrusion die 31.

[0041] The second spiral extrusion device 2 is arranged in a direction perpendicular to the axis of the double-layer extrusion die 3 component. The device includes a second feed port 21. By adding slow-release mixed raw materials at the second feed port 21, the outer layer of the double-layer feed pellets 6 with a slow-release effect is extruded through the outer layer extrusion die 32.

[0042] The double-layer feed pellets are prepared with different raw material mixes and proportions for the inner and outer layers. The inner layer contains slow-release nutrients, while the outer layer contains normal-release nutrients. This allows the double-layer feed pellets to release nutrients layer by layer in a predetermined order in the calf's rumen, ensuring a continuous supply of nutrients over a longer period of time. This meets the calf's sustained nutritional needs during early growth, improves feed utilization, and avoids the phenomenon of excessively rapid nutrient release, which can lead to some nutrients being excreted without being fully absorbed.

[0043] Example 2

[0044] like Figures 4 and 5 The diagram illustrates the overall structure of the double-layer extrusion die and the double-layer feed pellets. As a preferred embodiment, the inner extrusion die 31 is provided with a flange 311 for fixedly connecting to the discharge port of the first spiral extrusion device 1, and there is a certain gap between the inner side of the outer extrusion die 32 and the outer side of the inner extrusion die 31, and a feed hole flange 321 is provided in the axial vertical direction for fixedly connecting to the transition connection device 33. The connection method ensures a close fit between the dies and a smooth flow of raw materials; the inner side of the transition connection device 33 and the inner side of the inner extrusion die 31 and the inner side of the outer extrusion die 32 are all conical cavities, and their surfaces are smooth and have a specific curvature to guide the raw materials to be squeezed in smoothly. The conical cavity not only helps to form a uniform double-layer structure, but also improves the stability of the double-layer feed pellets 6.

[0045] In order to adjust the thickness of the inner and outer layers of the double-layer feed pellets 6 to meet the needs of calves at different growth stages, the inner layer extrusion mold 31 and the outer layer extrusion mold 32 can be set with multiple specifications and models. The inner layer extrusion molds 31 and the inner layer extrusion molds 31 of different specifications and models are combined with each other, which not only realizes the versatility and practicality of the entire mold, but also realizes the replaceability and maintainability between the molds. The combined molds are used to make double-layer feed pellets 6 with different inner and outer layer thicknesses.

[0046] In order to meet the digestive capacity and nutritional needs of calves in different early growth stages, the double-layer feed pellets 6 are produced by adjusting the inner layer extrusion die 31 and the outer layer extrusion die 32 of different specifications and models, including the outer normal release layer 61 and the inner slow release layer 62. The double-layer feed pellets 6 with different thicknesses of the normal release layer 61 and the slow release layer 62 can be precisely controlled, so that the double-layer feed pellets 6 can better meet the nutritional needs of calves in different production cycles of 1-6 months in the early stage of breeding. The following embodiments can be designed:

[0047] 1-2 months in the early stages of calves (dairy calf stage): At this stage, the calf's digestive system is not yet fully developed and is relatively weak. By selecting the outer extrusion die 32 to control the particle size at 2 mm, it is beneficial for the calf's digestion and absorption. The inner extrusion die 31 is selected to gradually increase the thickness of the outer normal release layer 61 to 1 mm-1.5 mm and the inner slow release layer 62 to a thinner thickness of 1 mm-0.5 mm. The thicker normal release layer 61 can ensure the rapid release of nutrients in the early stages of the calf and provide initial nutritional support. The thinner slow release layer 62 can enable the calf to gradually adapt to the feed (containing a small amount of trace elements such as minerals and vitamins), achieve initial stimulation of the early development of the rumen, reduce the risk of diarrhea, and ensure that the feed particles can be quickly absorbed by the calf.

[0048] 2-3 months in the middle stage of calf (weaning transition period): At this stage, the calf's digestive system gradually matures and begins to accept more solid feed. At the same time, the demand for protein, vitamins and minerals increases. By selecting the outer extrusion die 32 to control the particle size at 4mm, the calf's nutritional needs are guaranteed. The inner extrusion die 31 is selected to gradually increase the thickness of the outer normal release layer 61 to 1.5mm-2mm and the inner slow release layer 62 to 2mm-2.5mm. The thinner normal release layer 61 can ensure the rapid release of early nutrients for the calf and provide more nutritional support. The thicker slow release layer 62 can enable the calf to fully adapt to the feed (containing appropriate minerals, vitamins and other trace elements) to slow down the release rate and stimulate the development of the rumen of the calf.

[0049] Mid-life calf stage (3-6 months) (nursery calf stage): During this stage, calves gradually transition to a diet based entirely on solid feed, while also needing to strengthen their immunity and promote bone and muscle growth. By selecting the outer extrusion die 32 to control the particle size at 6mm, the calf's comprehensive nutritional requirements are met. The inner extrusion die 31 is then used to gradually increase the thickness of the outer normal-release layer 61 to a thicker 2.5mm-3mm and the inner slow-release layer 62 to a thinner 3mm-3.5mm. The thinner normal-release layer 61 ensures rapid release of early nutrients, providing comprehensive nutritional support. The thicker slow-release layer 62 allows the calf to continuously absorb the feed (containing appropriate minerals, vitamins, and other trace elements), achieving a longer release rate and long-term stimulation of rumen development.

[0050] By adjusting the inner layer extrusion die 31 and the outer layer extrusion die 32 of different specifications and models, the shapes of the extrusion ports are set differently, and the inner layer extrusion die 31 and the outer layer extrusion die 32 with different shapes of extrusion ports are combined with each other to produce double-layer feed pellets 6 with different inner and outer layer shapes, thereby improving the diversification of feed. The mixed diversification of feed can provide different physical stimulations, which are conducive to the peristalsis and development of the rumen. The shape of the extrusion port can be designed as follows: Figure 5 The circular holes can also be designed into various shapes such as elliptical holes and square holes to form double-layer feed particles 6 with different shapes. In order to further stimulate the early rumen development of calves, the following embodiments can be designed:

[0051] During the first 1-2 months of life (dairy calf stage): The digestive system of calves at this stage is not yet fully developed, and gentle physical stimulation is needed to promote gastrointestinal motility. The inner extrusion die 31 uses a circular hole discharge port to form smaller, smooth, round pellets on the inner layer, increasing pellet stability and ensuring sustained nutrient release. The outer extrusion die 32 can have an elliptical or circular hole, allowing the outer layer pellets to roll in the mouth, gently stimulating the oral cavity and stomach lining.

[0052] During the mid-life of calves (2-3 months) (weaning transition period), calves begin to digest more complex foods, and their digestive systems mature. They require increased physical stimulation to further promote rumen development. The inner extrusion die 31 uses a square shape to produce a more solid inner pellet, which delays the release of certain nutrients. The outer extrusion die 32 uses a polygonal shape with more irregular holes on the outer layer to increase physical stimulation and enhance rumen function.

[0053] Mid-life calf (3-6 months) (nursery calf stage): At this stage, calves' digestive function is essentially complete, and rumen motility needs to be enhanced. Inner layer extrusion die 31: More complex shapes, such as star-shaped or diamond-shaped holes, can be used. The inner layer pellets are more durable and further provide sustained release. Outer layer extrusion die 32: Square holes are used, and the contact area between the pellet size and the outer layer is gradually increased to increase physical stimulation and provide a certain amount of mechanical friction, promoting rumen motility. Alternatively, feeds of various shapes can be mixed together to provide different physical stimulations.

[0054] Example 3

[0055] like Figure 1 , Figure 3 The figure shows the overall structure of a slow-release calf early rumen stimulation feed processing device. The slow-release calf early rumen stimulation feed processing device of this embodiment is automated and improved on the basis of the first embodiment. In order to achieve more stable and accurate processing of double-layer feed pellets 6, the first spiral extrusion device 1 and the second spiral extrusion device 2 are respectively arranged in parallel on the fixed frame 7, and are driven by independent drive devices 8 respectively. By adjusting the discharge speed ratio of the two groups of spiral extrusion devices, the stability and accuracy of the combination of inner layer extrusion mold 31 and outer layer extrusion mold 32 of different specifications can be better adapted. The two groups of drive devices 8 are electrically connected to other control units to control different speeds. The drive device 8 includes a variable frequency motor 43, a reduction box 82, and a transmission sprocket group 83, which can provide sufficient torque for the spiral extrusion device to further achieve the stability of the device. At the same time, the fixed frame 7 is an assembled structure, which can adapt to the installation in different installation scenarios.

[0056] Example 4

[0057] like Figure 2 The diagram shows the structure of a discharge cutting assembly of a sustained-release calf early rumen stimulation feed processing device. The sustained-release calf early rumen stimulation feed processing device of this embodiment is based on the first embodiment, and the discharge cutting assembly 4 is improved. In order to achieve rapid cutting of double-layer feed particles 6, the discharge cutting assembly 4 includes a fixed seat 41, a cutter 42, and a motor 43. The cutter 42 is a cross-shaped scraper structure, the center of which is offset from the axis direction of the double-layer extrusion die 3 component and is arranged outside the outer diameter of the discharge port of the double-layer extrusion die 3 component, and its end face is attached to the end face of the double-layer extrusion die 3 component.

[0058] In order to achieve more precise cutting of the length of the double-layer feed pellets 6, the motor 43 of the discharge cutting assembly 4 is of variable frequency type, which can control different rotation speeds and can be electrically connected to other control units. By controlling the rotation speed of the motor 43, the length of the cylindrical feed pellets can be precisely controlled. This not only improves the uniformity of the feed pellets, but also enhances the degree of automation of the entire device, while also meeting the different needs of calves' early growth.

[0059] Finally, it should be noted that unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0060] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0061] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0062] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A slow-release calf early rumen stimulation feed processing device, characterized by: The invention comprises a double-layer extrusion die (3), wherein the double-layer extrusion die (3) is fixedly connected to a first screw extrusion device (1) and a second screw extrusion device (2), respectively; a discharge cutting assembly (4) is fixed at the end of the double-layer extrusion die (3), for cutting the extruded double-layer feed stick into double-layer feed pellets (6); a conveying device (5) is provided below the discharge cutting assembly (4), for collecting the double-layer feed pellets (6) and transporting them to the next working link; The double-layer extrusion die (3) comprises an inner-layer extrusion die (31), an outer-layer extrusion die (32), and a transition connection device (33); the inner-layer extrusion die (31) is fixedly connected to the axial rear end of the outer-layer extrusion die (32) and connected to the discharge port of the first spiral extrusion device (1); the outer-layer extrusion die (32) is connected to the discharge port of the second spiral extrusion device (2) via the transition connection device (33); The first spiral extrusion device (1) is arranged in the axial direction of the double-layer extrusion die (3), and comprises a first feed port (11), wherein the first feed port (11) is used to add a normal release type mixed ratio raw material and extrude the inner layer of the double-layer feed pellets (6) through the inner layer extrusion die (31); The second spiral extrusion device (2) is arranged in a direction perpendicular to the axis of the double-layer extrusion die (3) and includes a second feed port (21). The second feed port (21) is used to add a slowly released mixed ratio raw material for extruding the outer layer of the double-layer feed pellets (6) through the outer layer extrusion die (32).

2. The slow-release calf early rumen stimulation feed processing device according to claim 1, characterized in that: The inner layer extrusion die (31) is provided with a flange (311) for fixedly connecting the outer layer extrusion die (32) and the discharge port of the first spiral extrusion device (1); a gap exists between the inner side of the outer layer extrusion die (32) and the outer side of the inner layer extrusion die (31), and a feed hole flange (321) is provided in the axial vertical direction for connecting the transition connection device (33); the inner side of the transition connection device (33) and the inner side of the inner layer extrusion die (31) and the inner side of the outer layer extrusion die (32) are all conical cavities.

3. The slow-release calf early rumen stimulation feed processing device according to claim 1, characterized in that: The inner layer extrusion die (31) and the outer layer extrusion die (32) are both set with multiple specifications and models. The inner layer extrusion die (31) and the outer layer extrusion die (32) of different specifications and models are combined with each other to produce double-layer feed pellets (6) with different inner and outer layer thicknesses.

4. The slow-release calf early rumen stimulation feed processing device according to claim 1 or 3, characterized in that: The inner layer extrusion dies (31) and outer layer extrusion dies (32) of different specifications and models are provided with different specifications in the shape of the extrusion openings. The inner layer extrusion dies (31) and outer layer extrusion dies (32) of different shapes of extrusion openings are combined with each other to produce double-layer feed pellets (6) with different inner and outer layer shapes.

5. The slow-release calf early rumen stimulation feed processing device according to claim 1, characterized in that The first screw extrusion device (1) and the second screw extrusion device (2) are respectively arranged in parallel on the fixed frame (7) and are driven by independent driving devices (8). The two sets of driving devices (8) are electrically connected to the control unit. The driving device (8) includes a variable frequency motor (43), a reduction gear box (82), and a transmission sprocket group (83). The fixed frame (7) is an assembled structure.

6. The slow-release calf early rumen stimulation feed processing device according to claim 1, characterized in that: The discharge cutting assembly (4) comprises a fixed seat (41), a cutter (42), and a motor (43). The cutter (42) is a cross-shaped scraper structure, the center of which is offset from the axis direction of the double-layer extrusion die (3) assembly and is arranged outside the outer diameter range of the discharge port of the double-layer extrusion die (3) assembly, and the end face thereof is attached to the end face of the double-layer extrusion die (3) assembly.

7. The slow-release calf early rumen stimulation feed processing device according to claim 6, characterized in that: The motor (43) of the discharge cutting assembly (4) is of variable frequency type and is electrically connected to the control unit. The length of the cylindrical feed particles cut is controlled by controlling the rotation speed of the motor (43).

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