Screening device for cattle and sheep feed processing

Abstract

The application discloses a screening device for cattle and sheep feed processing and belongs to the technical field of material screening. The screening device for cattle and sheep feed processing comprises a screening box provided with a feeding port at the top, a plurality of groups of screen meshes obliquely arranged in the screening box, and a pushing assembly comprising a pushing plate and a pull rod. The pushing plate is arranged on the top of the screen mesh and parallel to the arrangement direction of the screen mesh. An interval exists between the pushing plate and the screen mesh. One end of the pull rod is fixedly connected with the pushing plate, and the other end penetrates through the screening box and is connected with a first driving source. The first driving source is used for driving the pull rod to reciprocate. A first reset spring is arranged on the pull rod. One end of the first reset spring is fixedly connected with the inner side wall of the screening box, and the other end is fixedly connected with the pushing plate. The pushing plate in reciprocating motion is used for dynamically spreading the feed accumulated at the feeding end, effectively dispersing the thickness of the feed layer, and uniformly distributing the material on the surface of the screen mesh, so that the local accumulation problem caused by the traditional top concentrated feeding is solved.

Description

Technical Field

[0001] This invention relates to the field of material screening technology, specifically to a screening device for processing cattle and sheep feed. Background Technology

[0002] Cattle and sheep feed refers to nutrients specifically provided for ruminants such as cattle and sheep, designed to meet their nutritional needs during growth, maintenance, and production processes. The quality and formulation of feed directly affect the health, growth rate, reproductive performance, and the yield and quality of livestock products in ruminants. Therefore, particle size classification of raw materials or finished feed is a crucial step in ensuring uniformity and palatability during feed processing, and screening devices are the core equipment for achieving this goal.

[0003] Currently, most mainstream cattle and sheep feed screening devices on the market adopt vibrating screening technology. Its basic structure includes a screening box, an inclined screen group, a vibrating motor, a feed inlet, a discharge outlet, and a frame. During operation, the feed enters the screening box through the feed inlet. Under the excitation of the vibrating motor, the feed undergoes a throwing motion on the inclined screen. Fine materials smaller than the screen hole size pass through the screen and fall to the lower layer, while coarse materials larger than the screen hole size move along the screen surface to the end for discharge, thereby achieving the purpose of grading by particle size.

[0004] Existing screening devices generally adopt a top-feed method, meaning that when the operator pours the feed to be screened into the screening box from the feed inlet at once, a large amount of feed will quickly accumulate at the beginning of the upper screen under gravity. Since the upper screen usually has large mesh and the screen surface is inclined, the feed lacks sufficient dispersion force in the initial falling stage, which easily leads to local accumulation. The thickness of the accumulated feed layer is much greater than the effective screening thickness of the screen, making it difficult for the lower fine material to penetrate the screen and reducing screening efficiency. On the other hand, the accumulated feed will hinder the falling of subsequent feed during vibration, and may even cause the screen to deform or be damaged due to excessive local pressure. Summary of the Invention

[0005] The purpose of this invention is to overcome the problems in the prior art and provide a screening device for processing cattle and sheep feed.

[0006] This invention provides a screening device for processing cattle and sheep feed, including a screening box with a feed inlet at the top, and multiple sets of screens inclinedly arranged inside the screening box. It also includes a pushing assembly, comprising a pushing plate and a pull rod. The pushing plate is disposed along the top edge of the screens, parallel to the direction in which the screens are arranged, and there is a gap between the pushing plate and the screens. One end of the pull rod is fixedly connected to the pushing plate, and the other end passes through the screening box and is connected to a first driving source. The first driving source drives the pull rod to reciprocate. A first... A return spring, one end of which is fixedly connected to the inner wall of the screening box, and the other end is fixedly connected to the pusher plate. The top of the pusher plate is connected to the feed inlet through an arc-shaped elastic receiving bin. The pusher plate has a cavity. A dispersing component is disposed in the cavity. The dispersing component includes a rotating rod and an arc-shaped receiving plate. The rotating rod is placed in the cavity and its direction is perpendicular to the moving direction of the pusher plate. Several arc-shaped receiving plates are arranged in an array along the periphery of the rotating rod. Both ends of the rotating rod pass through the pusher plate and are connected to a transmission component.

[0007] Preferably, the pusher plate has an arc-shaped slope on the side away from the push rod, and the thickness of the top of the pusher plate is less than the thickness of the bottom.

[0008] Preferably, the pusher plate is made of stainless steel plate by stamping, and its length is consistent with the width of the top screen. The arc-shaped slope has a slope angle θ=30°~45° and is surface polished.

[0009] Preferably, the dispersing blades are arc-shaped blades, and a plurality of the dispersing blades are fixed to the surface of the rotating disk in a spiral array.

[0010] Preferably, the first driving source includes a motor, a second rotating disk, a first abutting plate, and a second abutting plate. The motor is fixedly connected to the outer wall of the screening box, and the output end of the motor is fixedly connected to the second rotating disk. The first abutting plate is fixedly connected to one end of the pull rod on the outside of the screening box. A plurality of second abutting plates are fixedly connected in an array on the second rotating disk. When the second rotating disk rotates, the plurality of second abutting plates abut against the first abutting plate in sequence, and the pusher plate reciprocates under the action of the first return spring.

[0011] Preferably, the transmission assembly includes a gear and a rack, the screen is provided with a sliding groove along the pushing direction of the pusher plate, the rack is placed in the sliding groove and fixedly connected to the screen, the gear meshes with the rack, the rotating rod is fixedly connected to the gear, a sliding block is slidably embedded in the sliding groove, and the sliding block is fixedly connected to the pusher plate.

[0012] Preferably, a plurality of cleaning hole protrusions are fixedly connected to the bottom end of each of the aforementioned arc-shaped receiving plates. The cleaning hole protrusions are flexible blocks, and the outer diameter of the cleaning hole protrusions is smaller than the inner diameter of the mesh openings on the screen.

[0013] Preferably, the feeding screen box is provided with a conveying plate and a storage box on one side, and the screening pipe is inclined with one end fixedly connected to the storage box and the other end connected to the screen discharge port.

[0014] Preferably, a transparent observation window is provided on one side of the screening box.

[0015] A preferred method of using a screening device for cattle and sheep feed processing includes the following steps: The cattle and sheep feed to be screened is poured in at a uniform speed through the feed inlet at the top of the screening box; the feed is poured onto the front end of the pusher plate through an arc-shaped elastic receiving bin; the first drive source is activated to drive the pull rod to perform reciprocating linear motion; during the reciprocating motion of the pull rod, the first return spring alternately compresses and extends with the displacement of the pull rod, providing a return force for the pusher plate and maintaining the continuity of the reciprocating motion; when the pusher plate moves, it gently pushes and flattens the feed accumulated in front of it along the screen surface; the device is driven by a transmission component. The rotating rod rotates, causing the arc-shaped receiving plate to rotate around the rotating rod. On one hand, this creates a rotational dispersing force on the feed, breaking up clumps in the feed through shearing and impact, thus loosening the feed particles. On the other hand, it rolls up and disperses the feed retained by the pusher plate, further facilitating the feed to pass through the sieve holes on the screen. The flattened and dispersed feed slides down the screen at an angle. Fine particles smaller than the sieve hole size pass through the screen and fall into the collection area at the bottom of the lower sieve, while coarse particles larger than the sieve hole size continue to move along the screen surface to the discharge end.

[0016] Compared with the prior art, the beneficial effects of the present invention are: The pusher plate is set parallel to the inclined screen with a pre-reserved fitting gap. In conjunction with the reciprocating drive structure of the first drive source and the first return spring, it can periodically push the feed accumulated at the feed end: avoiding excessive local material layer blocking the path of fine material through the screen, and preventing excessive local pressure from causing screen deformation and damage; on the other hand, the reciprocating motion of the pusher plate can drive the feed to slide slowly down the screen, avoiding the stagnation of the screen caused by the static accumulation of feed. The arc-shaped elastic receiving bin at the top of the pusher plate can receive the material coming from the feed inlet: the arc structure can guide the feed to fall evenly to the screen area in front of the pusher plate, avoiding material splashing and uneven distribution; the elastic material can buffer the impact force of the feed, which not only prevents the feed from clumping again due to the impact, but also reduces the direct impact damage to the screen, ensuring the uniform distribution of the material entering the screen from the source; The arc-shaped receiving plate is integrated into the cavity of the pusher plate. While reciprocating synchronously with the pusher plate, it is driven by the transmission component to rotate around the rotating rod. During the rotation, the arc-shaped receiving plate generates a gentle shearing force, which only targets and breaks up the sticky clumps in the feed caused by moisture and compression, without damaging qualified feed particles. When the array of arc-shaped receiving plates rotates, it can form a vortex-like material flow field, causing the feed to roll slightly on the screen surface, allowing fine feed particles to settle to the bottom of the material layer and directly contact the screen, greatly shortening the screening path and reducing screening resistance, allowing fine materials that were originally wrapped by the upper layer of material to quickly pass through the screen holes. When the pusher plate returns to its original position, the rotating arc-shaped receiving plate can roll up the small amount of feed stuck on the back side of the pusher plate and re-spread it back onto the screen surface, avoiding the blind spot of material accumulation behind the pusher plate, achieving uniform material distribution across the entire screen area, maximizing the effective screening area of ​​the screen, and avoiding the defect of traditional flattening structures that can only handle the material in front of the plate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the internal structure of the screening box of the present invention.

[0018] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the present invention.

[0019] Figure 3 This is a schematic diagram of the pusher assembly of the present invention during operation.

[0020] Figure 4 This is a schematic diagram of the disintegration component structure of the present invention.

[0021] Figure 5 This is a schematic diagram of the internal structure of the pusher plate of the present invention.

[0022] Figure 6 This is a schematic diagram of the force transmission structure of the first and second abutting pieces of the present invention.

[0023] Figure 7 This is a schematic diagram of the structure of the pusher plate and screen of the present invention.

[0024] Explanation of reference numerals in the attached drawings: 1. Screening box; 2. Feed inlet; 3. Screen; 4. Pushing assembly; 41. Pushing plate; 42. Pull rod; 43. First return spring; 5. First drive source; 51. Motor; 52. Second rotating disk; 53. First abutment plate; 54. Second abutment plate; 6. Dispersing assembly; 61. Rotating rod; 62. Arc-shaped receiving plate; 7. Arc-shaped ramp; 8. Transmission assembly; 81. Rack; 82. Gear; 83. Sliding block; 9. Cleaning hole protrusion; 10. Conveying plate; 11. Storage box; 12. Arc-shaped elastic receiving bin. Detailed Implementation

[0025] The following is in conjunction with the appendix Figures 1-7To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. Based on the described 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. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art.

[0026] The terms "first," "second," and similar words used in the patent application specification and claims of this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "inner," "outer," "upper," "lower," "far," "near," "front," and "rear" are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. The drawings in this invention are not strictly drawn to scale; the specific dimensions and quantity of each structure can be determined according to actual needs. The drawings described in this invention are merely structural schematic diagrams.

[0027] The screening device for processing cattle and sheep feed provided by this invention, such as Figures 1-5 As shown, the system includes a screening box 1 with a feed inlet 2 at the top, and multiple sets of screens 3 inclinedly arranged inside the screening box 1. It also includes a pushing assembly 4, comprising a pushing plate 41 and a pull rod 42. The pushing plate 41 is positioned on top of the screens 3, and its movement direction is parallel to that of the screens 3, with a gap between the pushing plate 41 and the screens 3. One end of the pull rod 42 is fixedly connected to the pushing plate 41; the other end passes through the screening box 1 and is connected to a first drive source 5. The first drive source 5 drives the pull rod 42 to reciprocate. A first return spring 43 is sleeved on the pull rod 42. One end of the reset spring 43 is fixedly connected to the inner wall of the screening box 1, and the other end is fixedly connected to the pusher plate 41. The top of the pusher plate 41 is connected to the feed inlet 2 through an arc-shaped elastic receiving bin. The pusher plate 41 has a cavity. The dispersing component 6 is set in the cavity. The dispersing component 6 includes a rotating rod 61 and an arc-shaped receiving plate 62. The rotating rod 61 is placed in the cavity and its direction is perpendicular to the moving direction of the pusher plate 41. Several arc-shaped receiving plates 62 are arranged in an array around the rotating rod 61. Both ends of the rotating rod 61 pass through the pusher plate 41 and are connected to the transmission component 8.

[0028] In this embodiment, the pusher plate 41 is arranged parallel to the inclined screen 3 with a pre-reserved fitting gap. In conjunction with the reciprocating drive structure of the first drive source 5 and the first reset spring 43, it can periodically push the feed accumulated at the feed end: avoiding excessive local material layer blocking the fine material's path through the screen, and preventing excessive local pressure from causing deformation and damage to the screen 3; on the other hand, the reciprocating motion of the pusher plate 41 can drive the feed to slide slowly down along the screen 3, avoiding the stagnation of the screen caused by the static accumulation of feed. The arc-shaped elastic receiving bin 12 at the top of the pusher plate 41 can receive the material coming from the feed inlet 2: the arc structure can guide the feed to fall evenly to the area of ​​the screen 3 in front of the pusher plate 41, avoiding material splashing and uneven distribution; the elastic material can buffer the impact force of the feed, which not only prevents the feed from clumping again due to the impact, but also reduces the direct impact damage to the screen 3, ensuring the uniformity of the distribution of the material entering the screen from the source. The arc-shaped receiving plate 62 is integrated into the cavity of the pusher plate 41. While reciprocating synchronously with the pusher plate 41, it is driven by the transmission component 8 to rotate around the rotating rod 61. During the rotation, the arc-shaped receiving plate 62 generates a gentle shearing force, which only targets and breaks up the sticky lumps formed in the feed due to moisture and compression, without damaging qualified feed particles. When the array of arc-shaped receiving plates 62 rotates, it can form a vortex material flow field, causing the feed to tumble slightly on the surface of the screen 3, so that fine feed particles can settle to the bottom of the material layer and directly contact the screen 3, greatly shortening the screening path. The screen reduces the resistance to sieving, allowing fine materials that were originally wrapped by the upper material to pass through the screen holes quickly. When the pusher plate 41 returns to its original position, the rotating arc-shaped receiving plate 62 can roll up the small amount of feed that is stuck on the back side of the pusher plate 41 and spread it back onto the surface of the screen 3, avoiding the blind area of ​​material accumulation behind the pusher plate. This achieves uniform material distribution across the entire width of the screen 3, maximizing the effective screening area of ​​the screen 3 and avoiding the defect that the traditional flattening structure can only handle the material in front of the plate. This improves the screening efficiency of the screening device and significantly enhances the production efficiency and product quality of cattle and sheep feed processing.

[0029] Preferred, such as Figure 3 As shown, the pusher plate 41 has an arc-shaped ramp 7 on the side away from the pull rod 42. The thickness of the top of the pusher plate 41 is less than the thickness of the bottom. The pusher plate 41 is made of stainless steel plate by stamping. Its length is consistent with the width of the top screen 3. The slope angle of the arc-shaped ramp 7 is θ=30°~45° and the surface is polished.

[0030] In this embodiment, the arc-shaped ramp 7 of the pusher plate 41, which is far from the drive end, is designed so that when the pusher plate 41 reciprocates, the trapezoidal ramp has a structure that is narrow at the top and wide at the bottom. When pushing, the material naturally slides to the sides / downward along the ramp, making it less likely to form a wedging or jam between the pusher plate 41 and the feed trough. This is especially suitable for granules and powders. The ramp contact decomposes the force on the material into a horizontal pushing force + an upward / lateral component force. Compared with a straight / vertical surface, the effective pushing force is greater and the resistance is smaller under the same pushing force, resulting in a lower load on the drive source. This causes the feed to generate axial displacement towards the end of the screen 3 during the flattening process, effectively avoiding the secondary accumulation phenomenon caused by traditional flat pusher plates. The pusher plate 41 is made of stainless steel plate by stamping. The stainless steel stamping process not only ensures that the pusher plate 41 has sufficient structural strength, but its surface polishing treatment significantly reduces the adhesion coefficient of feed particles.

[0031] The pusher plate 41 has a thickness gradient structure with a top thickness smaller than the bottom thickness, which reduces the weight while ensuring rigidity. Combined with the elastic buffer of the first return spring 43, it effectively improves the efficiency of the leveling operation.

[0032] Preferred, such as Figures 1-6 As shown, the first driving source 5 includes a motor 51, a second rotating disk 52, a first abutting piece 53, and a second abutting piece 54. The motor 51 is fixedly connected to the outer wall of the screening box 1. The output end of the motor 51 is fixedly connected to the second rotating disk 52. The first abutting piece 53 is fixedly connected to one end of the pull rod 42 on the outside of the screening box 1. Several second abutting pieces 54 are fixedly connected in an array on the second rotating disk 52. When the second rotating disk 52 rotates, several second abutting pieces 54 abut against the first abutting piece 53 in sequence. Under the action of the first return spring 43, the push plate 41 reciprocates. In the initial state, any one of the several second abutting pieces 54 abuts against the first abutting piece 53. The interval between the several second abutting pieces 54 abutting against the first abutting piece 53 is the same as the stroke time of one reciprocating motion of the pull rod 42.

[0033] In this embodiment, the second rotating disk 52 is driven to rotate by the motor 51, so that the second abutting piece 54 arranged in the array intermittently abuts with the first abutting piece 53, and the rotational motion is converted into the reciprocating linear motion of the pusher plate 41. When the pull rod 42 moves back and forth, the first reset spring 43 alternately compresses and extends with the displacement of the pull rod 42, providing reset power for the pusher plate 41 and maintaining the continuity of the reciprocating motion. When the pusher plate 41 moves, it gently pushes and flattens the feed piled in front of it along the surface of the screen 3.

[0034] Preferred, such as Figures 3-4As shown, the transmission assembly 8 includes a gear 82 and a rack 81. The screen 3 has a sliding groove along the pushing direction of the pusher plate 41. The rack 81 is placed in the sliding groove and fixedly connected to the screen 3. The gear 82 meshes with the rack 81. The rotating rod 61 is fixedly connected to the gear 82. A sliding block 83 is slidably embedded in the sliding groove and is fixedly connected to the pusher plate 41.

[0035] In this embodiment, there is no need to configure a separate drive motor 51 for the dispersing component 6. The reciprocating linear displacement of the pusher plate 41 can be converted into the rotational power of the rotating rod 61 through the meshing of the gear 82 and rack 81. This greatly simplifies the overall structure, reduces the equipment manufacturing cost and electrical control complexity, and reduces the failure risk of multiple power sources operating in tandem, thus improving the operational stability of the equipment in dusty environments during feed processing. The rotational frequency of the dispersing component 6 is directly positively correlated with the reciprocating speed of the pusher plate 41. When the pusher plate 41 pushes faster, the meshing speed of the gear 82 increases synchronously, and the dispersing frequency increases accordingly, which can specifically address the breaking up of agglomerates in thick material layers. The material is crushed to meet the requirements. When the pusher plate 41 operates at low speed, the crushing intensity decreases accordingly, adapting to the gentle handling requirements of thin material layers and achieving a matching action of flattening and crushing. The sliding groove not only provides an installation carrier for the rack 81, but also is fixedly connected to the pusher plate 41 through the built-in sliding block 83, providing additional guiding support for the reciprocating motion of the pusher plate 41. This counteracts the lateral resistance of the feed to the pusher plate 41 during the pushing process, prevents the rotating rod 61 from bending and deforming due to unilateral force, ensures the straightness of the pusher plate 41 in long-term reciprocating motion, and also prevents problems such as tooth skipping and wear caused by misalignment between the gear 82 and the rack 81, thus extending the service life of the transmission components.

[0036] Preferred, such as Figure 5 As shown, several arc-shaped receiving plates 62 are fixedly connected to several cleaning hole protrusions 9 at their bottom ends. The cleaning hole protrusions 9 are flexible blocks, and the outer diameter of the cleaning hole protrusions 9 is smaller than the inner diameter of the mesh openings of the screen 3.

[0037] In this embodiment, the outer diameter of the cleaning protrusion 9 is slightly smaller than the inner diameter of the mesh opening of the screen 3. When the arc-shaped receiving plate 62 rotates and disperses the material, the flexible protrusion periodically inserts into the screen opening, physically dislodging particles or fibrous impurities stuck in the opening. This prevents screen clogging at its source and avoids the problem of frequent shutdowns for cleaning required by traditional screening devices due to screen clogging, ensuring that the screen opening is always in a highly transparent state. The cleaning protrusion 9 is made of flexible materials such as food-grade silicone or polyurethane, which are much lower in hardness than the metal screen 3. When inserted into the screen opening, it only produces elastic deformation and will not cause rigid scraping or hole enlargement damage to the screen 3. While ensuring the cleaning effect, it effectively extends the service life of the screen 3, especially suitable for precision screens 3 with rust-proof surface treatment. During rotation, the flexible protrusion can cooperate with the curved surface of the arc-shaped receiving plate 62. The elastic swing of the flexible protrusion can produce a slight disturbance to the material on the surface of the screen 3, helping to disperse the fine clumps at the bottom of the plate, making it easier for fine materials to contact the screen opening, further improving the screening accuracy.

[0038] Preferred, such as Figures 1-2 As shown, a conveying plate 10 and a storage box 11 are provided on one side of the feeding screening box 1. The screening pipe is inclined and one end is fixedly connected to the storage box 11, and the other end is connected to the discharge port of the screen 3.

[0039] In this embodiment, the angle between the conveying plate 10 and the horizontal plane is set to 30°~35°, so that the material forms a peristaltic forward movement under the action of gravity. An adjustable guide plate is set at the outlet of the pipeline.

[0040] Better, such as Figures 1-2 As shown, a transparent observation window is provided on one side of the screening box 1.

[0041] In this embodiment, the transparent observation window uses a double-layer tempered glass sandwich structure, with flame-retardant silicone filling the space between. The observation window frame features a labyrinthine sealing structure, significantly improving equipment safety.

[0042] The method of using the screening device for processing cattle and sheep feed of the present invention is as follows: First, the cattle and sheep feed to be screened is fed into the feed inlet 2 at the top of the screening box 1 at a uniform speed. The material falls flexibly along the arc-shaped elastic receiving bin 12 to the feed end of the top screen 3 and naturally accumulates in front of the pusher plate 41. Then, the first drive source 5 is started, and the motor 51 drives the second rotating disk 52 to rotate. The second abutting pieces 54 arranged in an array on the disk periodically abut against the first abutting pieces 53 at the end of the pull rod 42. With the alternating compression and rebound of the first return spring 43, the pusher plate 41 is driven to make a stable reciprocating linear motion along the width direction of the screen 3. The thick layer of material accumulated locally at the feed end is gently pushed and flattened, so that the material covers the surface of the screen 3 with a uniform thickness, avoiding excessive local pressure that could cause the screen 3 to deform or the fine material to be blocked from passing through the screen.

[0043] While the pusher plate 41 reciprocates, the transmission assembly 8 is synchronously triggered through the transmission engagement of gear 82 and rack 81: when the pusher plate 41 moves along the sliding groove, the gear 82 meshes with the rack 81 fixed on the screen 3 and rotates, driving the rotating rod 61 and the arc-shaped receiving plates 62 arranged around the periphery to rotate at high speed around an axis perpendicular to the pushing direction; the rotating arc-shaped receiving plates 62, on the one hand, break up the sticky clumps formed in the feed due to moisture or compression through gentle shearing force, avoiding clumps from clogging the screen holes, and on the other hand, form a vortex material flow field, causing the material layer to tumble slightly, so that the fine particles wrapped by the upper material settle to the bottom and contact the screen 3, greatly shortening the screening path, and at the same time, it can also roll up the small amount of feed that is stuck behind the plate when the pusher plate 41 is reset and redistribute it, eliminating the flattening blind area.

[0044] After being flattened and broken up, the feed slowly slides downwards along the screen surface under the combined action of its own weight and the tilt angle of the screen 3. Fine particles smaller than the screen holes quickly pass through the screen 3 and fall into the collection area below, while coarse particles larger than the screen holes move along the screen surface to the end for discharge. Throughout the process, the screening status can be monitored in real time through a transparent observation window on one side of the screening box 1. The material on the screen is eventually automatically returned to the storage box 11 via the conveyor plate 10, realizing continuous screening operation. While ensuring the integrity of the feed particles, the screening efficiency and grading accuracy are greatly improved, which is suitable for the production needs of large-scale cattle and sheep feed processing.

[0045] 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 screening device for processing cattle and sheep feed, comprising a screening box with a feed inlet at the top, and multiple sets of screens inclinedly arranged within the screening box, characterized in that, Also includes: The material pushing assembly includes a material pushing plate and a pull rod. The material pushing plate is disposed on the top of the screen and parallel to the setting direction of the screen. There is a gap between the material pushing plate and the screen. One end of the pull rod is fixedly connected to the pusher plate, and the other end passes through the screening box and is connected to a first drive source. The first drive source is used to drive the pull rod to reciprocate. A first return spring is sleeved on the pull rod. One end of the first return spring is fixedly connected to the inner side wall of the screening box, and the other end is fixedly connected to the pusher plate. The top of the pusher plate is connected to the feed port through an arc-shaped elastic receiving bin. The pusher plate has a cavity inside. A dispersing component is disposed within the cavity. The dispersing component includes a rotating rod and an arc-shaped receiving plate. The rotating rod is positioned within the cavity and its direction is perpendicular to the moving direction of the pusher plate. Several arc-shaped receiving plates are arranged in an array along the periphery of the rotating rod. Both ends of the rotating rod penetrate the pusher plate and are connected to a transmission component.

2. The screening device for processing cattle and sheep feed as described in claim 1, characterized in that, The pusher plate has an arc-shaped slope on the side away from the push rod, and the thickness of the top of the pusher plate is less than the thickness of the bottom.

3. The screening device for processing cattle and sheep feed as described in claim 2, characterized in that, The pusher plate is made of stainless steel plate by stamping, and its length is consistent with the width of the top screen. The slope angle of the arc-shaped ramp is θ=30°~45° and the surface is polished.

4. The screening device for processing cattle and sheep feed as described in claim 1, characterized in that, The first driving source includes a motor, a second rotating disk, a first abutting plate, and a second abutting plate. The motor is fixedly connected to the outer wall of the screening box, and the output end of the motor is fixedly connected to the second rotating disk. The first abutting plate is fixedly connected to one end of the pull rod on the outside of the screening box. A plurality of second abutting plates are fixedly connected in an array on the second rotating disk. When the second rotating disk rotates, the plurality of second abutting plates abut against the first abutting plates in sequence, and the pusher plate reciprocates under the action of the first return spring.

5. The screening device for processing cattle and sheep feed as described in claim 1, characterized in that, The transmission assembly includes a gear and a rack. The screen has a sliding groove along the pushing direction of the pusher plate. The rack is placed in the sliding groove and fixedly connected to the screen. The gear meshes with the rack. The rotating rod is fixedly connected to the gear. A sliding block is slidably embedded in the sliding groove and fixedly connected to the pusher plate.

6. The screening device for processing cattle and sheep feed as described in claim 1, characterized in that, Several cleaning hole protrusions are fixedly connected to the bottom ends of the arc-shaped receiving plates. The cleaning hole protrusions are flexible blocks, and the outer diameter of the cleaning hole protrusions is smaller than the inner diameter of the mesh holes on the screen.

7. The screening device for processing cattle and sheep feed as described in claim 1, characterized in that, The feeding screen box is provided with a conveying plate and a storage box on one side. The conveying plate is inclined to the horizontal plane, and one end is fixedly connected to the storage box, while the other end is connected to the screen discharge port.

8. The screening device for processing cattle and sheep feed as described in claim 1, characterized in that, A transparent observation window is provided on one side of the screening box.

9. The method of using the screening device for processing cattle and sheep feed as described in any one of claims 1 to 8, characterized in that, Includes the following steps: The cattle and sheep feed to be screened is poured in at a uniform speed through the feed inlet at the top of the screening box, and the feed is poured into the front end of the pusher plate through the arc-shaped elastic receiving bin. Turn on the first drive source to drive the pull rod to perform reciprocating linear motion; when the pull rod reciprocates, the first return spring alternately compresses and extends with the displacement of the pull rod to provide return power for the push plate and maintain the continuity of the reciprocating motion. When the push plate moves, it gently pushes and flattens the feed piled in front of it along the screen surface. The transmission assembly drives the rotating rod to rotate, which in turn drives the arc-shaped receiving plate to rotate around the rotating rod. On the one hand, this generates a rotational dispersing force on the feed, breaking up clumps in the feed through shearing and impact, thus loosening the feed particles. On the other hand, it rolls up the feed that is stuck behind the pusher plate and spreads it out, making it easier for the feed to pass through the sieve holes on the screen. After being flattened and broken up, the feed slides down the screen at an angle. Fine particles smaller than the screen aperture size pass through the screen and fall into the collection area at the bottom of the lower screen, while coarse particles larger than the screen aperture size continue to move along the screen surface to the discharge end.

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