Microelement compound premix granulating and screening equipment and application method

Abstract

The invention discloses a trace element compound premix granulating and screening device and an application method, and relates to the technical field of screening equipment.The trace element compound premix granulating and screening device comprises a base plate, a scrap screening speed control mechanism, a multi-stage screening mechanism, a screen drum radial vibration mechanism and a screen drum lifting and transferring mechanism; an inclined rectangular frame is mounted on the upper side of the seat plate through an inclined control assembly; the multi-stage screening mechanism comprises rotating sleeves, the rear side of the inclined rectangular frame is transversely and rotationally connected with three longitudinal rotating sleeves at equal intervals, the three rotating sleeves are all connected with a screen drum rotating power assembly, a prism is longitudinally and slidably connected into each rotating sleeve, and the front end of the prism in the middle is connected with a scrap screening assembly; according to the microelement compound premix granulating and screening equipment and the application method, a multi-stage screening mode is adopted, chippings and particles with the size exceeding the standard can be screened out, non-stop screen hole cleaning work can be achieved, and the particle screening efficiency can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of screening equipment, in particular to a trace element composite premix granulation screening equipment and an application method. Background Art

[0002] At present, compound feeds used in animal breeding are mainly composed of two parts: one is feed prepared based on corn, soybean meal, etc., and the other is core premixes containing trace elements, vitamins, amino acids, etc. These two parts work together to ensure that animals can obtain a comprehensive and balanced nutritional supply. Among them, trace element composite premixes are the key components of core premixes. However, trace elements are relatively active in nature, and during the storage, processing and feeding of feed, they are easy to damage nutrients such as vitamins and fatty acids in feed. This not only reduces the nutritional value of the feed, but also affects the normal growth and health of animals. In order to solve this problem, granulation technology is often used in the feed industry to improve the performance of trace element composite premixes. Granulated trace element composite premixes can significantly reduce the damage of trace elements to sensitive components such as vitamins in feed. In addition, due to the uniformity and moderate size of the particles, the granulated premixes have better flowability, which is conducive to the uniform mixing of trace elements and is easier to store and transport. However, there are still some problems in the granulation process of trace element composite premixes. For example, if the particle size is inconsistent, debris or particles with excessive size may appear, which will affect the uniformity of the trace element compound premix, and then affect the quality and effect of the compound feed. In order to solve this problem, screening equipment is usually required to screen out debris and particles with excessive size. Existing screening equipment mostly uses multi-stage screens, but the screen holes are easily blocked and need to be stopped for cleaning, which affects production efficiency to a certain extent. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a trace element composite premix granulation and screening equipment and an application method. The overall structure is compact and adopts a multi-stage screening method. It can screen out debris and particles with oversized sizes, and can realize the sieve hole cleaning work without stopping the machine, which is beneficial to improving the screening efficiency of the particles and can effectively solve the problems in the background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a trace element composite premix granulation and screening device, comprising a base plate, and also comprising: The debris screening speed control mechanism comprises a tilt control assembly and a tilt rectangular frame, wherein the upper side of the seat plate is provided with the tilt rectangular frame via the tilt control assembly; The multi-stage screening mechanism comprises a rotating sleeve, a standard particle screening assembly and a debris screening assembly. The rear side of the inclined rectangular frame is horizontally and equidistantly connected to three longitudinal rotating sleeves, and the three rotating sleeves are all connected to the screen drum rotating power assembly. A prism is longitudinally and slidably connected in each rotating sleeve, and the front end of the middle prism is connected to the debris screening assembly, and the front ends of the left and right prisms are respectively connected to two standard particle screening assemblies; The radial vibration mechanism of the screen drum is installed at the rear end of the inclined rectangular frame, and the radial vibration mechanism of the screen drum is connected to the rear ends of the three prisms; The screen drum lifting and transferring mechanism is installed on the seat plate, and the screen drum lifting and transferring mechanism is arranged corresponding to the inner front end of the inclined rectangular frame.

[0005] The tilt control component is used to control the tilt state of the tilted rectangular frame, so that the tilted rectangular frame is in a tilted state with the front lower and the back higher. The tilt control component is also used to control the tilt angle of the tilted rectangular frame. The larger the tilt angle of the tilted rectangular frame, the faster the speed at which the particles to be screened pass through the debris screening component. At this time, the screening effect for the debris in the particles to be screened decreases. The smaller the tilt angle of the tilted rectangular frame, the slower the speed at which the particles to be screened pass through the debris screening component. At this time, the screening effect for the debris in the particles to be screened improves. Therefore, it is necessary to adjust the tilted rectangular frame to a suitable tilt angle to ensure that the particles to be screened can completely screen out the debris when passing through the debris screening component, while maintaining a faster passing speed, taking into account both the screening effect and the screening speed. The screen drum rotating power component is used to drive the three rotating sleeves to rotate relative to the tilted rectangular frame. The three rotating sleeves will drive the three prisms to rotate. The three prisms can drive the two standard particle screening assemblies and the debris screening assembly to rotate. The rotating two standard particle screening assemblies and the debris screening assembly can improve the screening effect of the particles to be screened. The screen drum radial The vibration mechanism is used to drive the three prisms to move back and forth at high frequency. Due to the sliding connection between the prisms and the rotating sleeve, the three prisms also vibrate back and forth while rotating. The three prisms can drive the two standard particle screening components and the debris screening component to vibrate back and forth at high frequency, so that the two standard particle screening components and the debris screening component can better screen the feed particles, and promote the feed particles to pass through the sieve holes on the standard particle screening components and the debris screening components smoothly and quickly. The particles to be screened are first sent into the debris screening component, and the particles to be screened rotate with the debris screening component, and also Rolling forward, the debris in the particles to be screened is screened and falls off, and then the particles to be screened fall from the front end of the debris screening component to the screen drum lifting and transferring mechanism, and then are sent to the rear ends of the two standard particle screening components by the screen drum lifting and transferring mechanism. The two standard particle screening components transport the particles to be screened backward as they rotate, and at the same time, the standard particles in the particles to be screened are screened and fall off, and the remaining oversized particles in the standard particle screening component are discharged from the rear end of the standard particle screening component, completing the screening of debris, standard particles and oversized particles.

[0006] Furthermore, the screen drum rotating power assembly includes synchronous gears, three synchronous gears are respectively installed on the outside of the three rotating sleeves, two adjacent synchronous gears are meshed and connected, a screening motor is installed at the rear bottom of the inclined rectangular frame through a motor bracket, and the output shaft of the screening motor is fixedly connected with a driving gear, which is meshed and connected with one of the synchronous gears. The motor bracket is used to install the screening motor, and the working of the screening motor drives the driving gear to rotate, and the driving gear drives one of the synchronous gears to rotate. Due to the meshing relationship of the three synchronous gears, the synchronous gear in the middle rotates clockwise, and the two synchronous gears on the left and right rotate counterclockwise.

[0007] Furthermore, the standard grain screening component includes a standard grain screen cylinder, the front ends of the left and right prisms are respectively fixedly connected to the rear ends of two inner shafts, each inner shaft is connected to the inner wall of the standard grain screen cylinder through a spoke rod, and standard grain screen holes are opened on the standard grain screen cylinder. The inner wall of the standard grain screen cylinder is provided with a rear-feeding spiral blade, and the front end of the standard grain screen cylinder is connected to the rear end of the feed cone. The left and right prisms drive the two standard particle screen cylinders to rotate counterclockwise through the inner shaft 1 and the spoke rod 1. The particles to be screened enter the front end of the standard particle screen cylinder through the feed cone. The shape of the feed cone promotes the particles to be screened in the feed cone to enter the front end of the standard particle screen cylinder. The counterclockwise rotation of the standard particle screen cylinder also drives the backward spiral blade to rotate counterclockwise. The rotating backward spiral blade transports the particles to be screened accumulated at the front end of the standard particle screen cylinder backward. With the backward movement of the particles to be screened and the rotation of the standard particle screen cylinder, the standard particles to be screened fall through the standard particle sieve holes, and the particles oversized are transported backward along the backward spiral blade until they are discharged from the rear end of the standard particle screen cylinder.

[0008] Furthermore, the debris screening assembly includes a debris screen cylinder, the front end of the middle prism is fixedly connected to the rear end of the second inner shaft, the second inner shaft is connected to the inner wall of the debris screen cylinder through the second spoke rod, the debris screen cylinder is located between two standard particle screen cylinders, and the debris screen cylinder is provided with debris screen holes. The middle prism drives the debris screen cylinder to rotate clockwise through the second inner shaft and the second spoke rod, and the particles to be screened are sent into the debris screen cylinder from the rear end of the debris screen cylinder. Since the debris screen cylinder is tilted with a lower front and a higher rear, the particles to be screened move forward along the bottom of the debris screen cylinder. As the debris screen cylinder rotates, the debris in the particles to be screened falls through the debris screen holes, completing the screening of the debris in the particles to be screened, and the particles to be screened without the debris are discharged from the front bottom of the debris screen cylinder.

[0009] Furthermore, the multi-stage screening mechanism also includes a standard grain sieve hole cleaning protrusion, and the outer peripheral side of the debris screen cylinder is provided with a standard grain sieve hole cleaning protrusion corresponding to the standard grain sieve hole. The particles during feed granulation are generally cylindrical, and the feed particles will inevitably get stuck in the standard grain sieve hole. After a long time, the screening effect of the standard grain sieve cylinder on the standard particles will decrease. The standard grain sieve hole cleaning protrusion is provided, and when the debris screen cylinder and the standard grain sieve cylinder rotate in opposite directions, the standard grain sieve hole cleaning protrusion extends into the standard grain sieve hole, and the particles stuck in the standard grain sieve hole can be squeezed back into the interior of the standard grain sieve cylinder. There is no need to stop the machine to clean the standard grain sieve hole during screening, which is conducive to improving the screening efficiency of feed particles.

[0010] Furthermore, the screen drum lifting and transfer mechanism includes a material box, and a receiving hopper is arranged on the seat plate at a position corresponding to the front end of the debris screen drum. The front side of the receiving hopper is connected to the material box, and the top of the material box is connected to the distribution box through a lifting assembly. The left and right sides of the distribution box are respectively connected to two transfer ports through two steel wire flexible pipes, and the two transfer ports are respectively installed on the inner side of the inclined rectangular frame through transfer port mounting frames, and the rear ends of the two transfer ports respectively extend into the inner side of the front end of the two feed cones.

[0011] The particles to be screened discharged from the bottom of the front end of the debris screen are collected in the material box through the receiving hopper. The particles to be screened in the material box are lifted into the distribution box by the lifting assembly, and then sent into the two feed cones through two steel wire flexible pipes and two transfer ports. The transfer port mounting frame positions the transfer port so that the transfer port is aligned with the front end opening of the feed cone. When the feed cone vibrates back and forth with the standard particle screen, it does not affect the transfer port from transporting the particles to be screened into the feed cone.

[0012] Furthermore, it also includes a feeding mechanism and a screening material collection mechanism, wherein the feeding mechanism is installed at the top of the rear side of the inclined rectangular frame, and the bottom end of the feeding mechanism extends into the top of the inner side of the rear end of the debris screen cylinder, and the screening material collection mechanism is installed below the inclined rectangular frame. The feed particles produced by the granulator fall into the feeding mechanism, and then are transferred to the debris screen cylinder through the feeding mechanism. The standard particles falling from the standard particle screen holes, the debris falling from the debris screen holes, and the over-standard particles discharged from the rear end of the standard particle screen cylinder will fall onto the screening material collection mechanism for classification and collection.

[0013] Furthermore, it also includes a debris screen hole anti-blocking cleaning mechanism, the debris screen hole anti-blocking cleaning mechanism includes a cleaning brush, the upper side of the rear end of the inclined rectangular frame is fixedly connected to the rear end of the axial rod through a support plate, the axial rod is distributed along the axial direction of the debris screen cylinder, and two radial guide pillars are slidably connected to the axial rod, the radial guide pillars are distributed along the radial direction of the debris screen cylinder, and the ends of the two radial guide pillars close to the debris screen cylinder are fixedly connected to the cleaning brush, the bristles on the cleaning brush are in contact with the outside of the debris screen cylinder, and the column section of the radial guide pillar located between the cleaning brush and the axial rod is sleeved with a compression spring. The debris entering the debris screen hole is small in size and can generally be removed by the brushing of the bristles on the cleaning brush. The compression spring pushes the cleaning brush close to the debris screen cylinder, and the debris in the debris screen hole can be cleaned as the debris screen cylinder rotates, and the debris screen cylinder vibrates back and forth, which can improve the cleaning effect of the debris in the debris screen hole.

[0014] Furthermore, the debris screen hole anti-blocking and cleaning mechanism also includes a concentric ring, two radial guide columns are fixedly connected to a control rod at one end away from the debris screen cylinder, the control rod is parallel to the axial rod, the rear end of the axial rod is fixedly connected to one end of the radial guide rod, the radial guide rod is parallel to the radial guide column, the radial guide rod is slidingly connected to the guide hole at the rear end of the axial rod, and the other end of the radial guide rod is fixedly connected to a wheel frame, a roller is rotatably installed in the wheel frame, a concentric ring is fixedly connected to the front side of the middle synchronous gear, the concentric ring is concentrically arranged with the middle synchronous gear, an arc protrusion is arranged in an annular array on the outer circumference of the concentric ring, and the outer circumference of the concentric ring is rollingly connected to the bottom of the roller. When the synchronous gear rotates, it can drive the concentric ring to rotate. The arc protrusion on the concentric ring will lift the roller, allowing the radial guide rod to slide along the axial rod. The radial guide rod drives the radial guide column away from the debris screen cylinder through the control rod. At this time, the compression spring is compressed. As the concentric ring rotates, the roller rolls over the arc protrusion. At this time, the compression spring rebounds and stretches, pushing the radial guide column close to the debris screen cylinder again. As a result, as the synchronous gear and the debris screen cylinder continue to rotate, the cleaning brush can be driven to continuously approach and move away from the debris screen cylinder. The bristles of the cleaning brush are easier to insert into the debris screen holes, and the cleaning effect of the debris screen holes is good. However, this method is also easy to speed up the damage speed of the bristles on the cleaning brush. Therefore, the replacement frequency of the cleaning brush needs to be increased. Therefore, the connection between the cleaning brush and the radial guide column needs to be set to a detachable structure or a quick-release structure.

[0015] An application method of a trace element composite premix granulation and screening device comprises the following steps: Step 1: The tilt control component controls the tilted rectangular frame to tilt in a low front and high back state, so that the debris screen drum and the two standard particle screen drums are in a tilted state with a low front and a high back state. The screening motor works, and drives the two standard particle screen drums to rotate counterclockwise through the transmission of the driving gear and the synchronous gear, and drives the debris screen drum to rotate clockwise at the same time. The radial vibration mechanism of the screen drum drives the debris screen drum and the two standard particle screen drums to vibrate back and forth through three prisms. Step 2: The particles to be screened are fed into the rear end of the debris screen drum through a feeding mechanism, and the particles to be screened roll forward in the rotating debris screen drum, and the debris in the particles to be screened falls through the debris screen holes; Step 3: The particles to be screened that have been screened out of debris fall into the receiving hopper, and then are lifted into the distribution box through the lifting assembly, and then are sent into two feeding cones through two steel wire flexible pipes and two transfer ports. The particles to be screened move backward in the standard particle screen cylinder as the backward spiral blade rotates, and the standard particles in the particles to be screened fall through the standard particle screen holes, and the particles that do not pass through the standard particle screen holes are discharged from the rear end of the standard particle screen cylinder; Step 4: The standard grain sieve hole cleaning protrusion rotates with the debris sieve cylinder. When the standard grain sieve hole cleaning protrusion moves to the position where the debris sieve cylinder and the standard grain sieve cylinder are close to each other, the standard grain sieve hole cleaning protrusion extends into the corresponding standard grain sieve hole on the standard grain sieve cylinder, squeezes out the particles stuck in the standard grain sieve hole, and completes the continuous cleaning of the standard grain sieve hole; Step 5: As the debris screen drum rotates, the bristles on the cleaning brush come into contact with the outer side of the debris screen drum to clean the debris in the debris screen holes.

[0016] Compared with the prior art, the trace element composite premix granulation and screening equipment and application method have the following beneficial effects: 1. The tilt control component controls the tilted rectangular frame to be in a tilted state with the front lower and the back higher. The screen drum rotating power component is used to drive the three rotating sleeves to rotate relative to the tilted rectangular frame. The three prisms can drive the two standard particle screening components and the debris screening components to rotate. The rotating two standard particle screening components and the debris screening components can improve the screening effect of the particles to be screened; 2. The radial vibration mechanism of the screen drum is used to drive the three prisms to move forward and backward at high frequency. Due to the sliding connection between the prisms and the rotating sleeve, the three prisms also vibrate forward and backward while rotating. The three prisms can drive the two standard particle screening components and the debris screening components to vibrate forward and backward at high frequency, so that the two standard particle screening components and the debris screening components can better screen the feed particles and promote the feed particles to pass through the sieve holes on the standard particle screening components and the debris screening components smoothly and quickly; 3. The particles to be screened are first fed into the debris screening assembly. The particles to be screened rotate with the debris screening assembly and also roll forward. The debris in the particles to be screened is screened and falls off. Then the particles to be screened fall from the front end of the debris screening assembly into the screen drum lifting and transferring mechanism. Then, they are sent to the rear ends of the two standard particle screening assemblies by the screen drum lifting and transferring mechanism. The two standard particle screening assemblies transport the particles to be screened backwards as they rotate. At the same time, the standard particles in the particles to be screened are screened and fall off. The remaining oversized particles in the standard particle screening assembly are discharged from the rear end of the standard particle screening assembly, completing the screening of debris, standard particles and oversized particles. 4. A standard grain sieve hole cleaning protrusion is provided. When the debris sieve cylinder and the standard grain sieve cylinder rotate in opposite directions, the standard grain sieve hole cleaning protrusion extends into the standard grain sieve hole, which can squeeze the particles stuck in the standard grain sieve hole back into the inside of the standard grain sieve cylinder. There is no need to stop the machine to clean the standard grain sieve hole during screening, which is beneficial to improve the screening efficiency of feed particles.

[0017] 5. The two standard particle screen cylinders and the debris screen cylinder are discharged in parallel and close to each other, which is compact as a whole. The multi-stage screening method is adopted to screen out debris and particles with excessive sizes, and obtain standard granular feed with uniform particles, thereby improving the palatability of feed particles. The sieve hole cleaning work can be realized without stopping the machine, which is beneficial to improving the particle screening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the trace element composite premix granulation and screening equipment of the present invention; Figure 2 The present invention is a trace element composite premix granulation and screening equipment Figure 1 A schematic diagram of the partially enlarged structure at center A; Figure 3 This is a schematic diagram of the rear structure of the trace element composite premix granulation and screening equipment of the present invention; Figure 4 The present invention is a trace element composite premix granulation and screening equipment Figure 3 A schematic diagram of the partially enlarged structure at B in the middle; Figure 5 It is a schematic diagram of the side structure of the trace element composite premix granulation and screening equipment of the present invention; Figure 6 It is a partial structural schematic diagram of the trace element composite premix granulation and screening equipment of the present invention; Figure 7 It is a partial structural schematic diagram of the second part of the trace element composite premix granulation and screening equipment of the present invention; Figure 8 The present invention is a trace element composite premix granulation and screening equipment Figure 7 A schematic diagram of the partially enlarged structure at C in the middle; Fig. 9 It is a structural schematic diagram of the screen drum lifting and transferring mechanism in the trace element composite premix granulation and screening equipment of the present invention; Fig.10 It is a schematic cross-sectional structure diagram of a screen drum lifting and transferring mechanism in the trace element composite premix granulation and screening equipment of the present invention; In the figure: 1 seat plate, 2 debris screening speed control mechanism, 21 support rod, 22 control shaft, 23 inclined rectangular frame, 24 movable seat 1, 25 electric telescopic rod, 26 movable seat 2, 27 movable shaft, 28 arc locking rod, 29 stud, 210 butterfly nut, 3 multi-stage screening mechanism, 31 rotating sleeve, 32 prism, 33 bearing, 34 standard grain screen cylinder, 35 standard grain screen hole, 36 inner shaft 1, 37 spoke rod 1, 38 back-feeding spiral blade, 39 feeding cone, 310 inner shaft 2, 311 spoke rod 2, 312 synchronous gear, 313 motor bracket, 314 screening motor, 315 driving gear, 316 debris screen cylinder, 317 debris screen hole, 318 standard grain screen hole cleaning protrusion, 4 screen cylinder radial vibration mechanism, 41 synchronous rod, 42 reset spring, 43 mounting frame, 44 wear-resistant wheel, 45 working motor, 46 cam, 5 feeding mechanism, 51 bending frame, 52 feeding hopper, 53 conveying channel, 6 screen drum lifting and transferring mechanism, 61 material box, 62 receiving hopper, 63 lifting cylinder, 64 conveying shaft, 65 lifting spiral blade, 66 material distribution box, 67 conveying motor, 68 steel wire flexible pipe, 69 transfer port, 610 positioning collar, 611 bracket, 7 screening material collecting mechanism, 71 mounting bracket one, 72 standard particle collecting trough, 73 debris collecting trough, 74 mounting bracket two, 75 over-standard particle collecting trough, 8 debris sieve hole anti-blocking cleaning mechanism, 81 support plate, 82 axial rod, 83 radial guide column, 84 compression spring, 85 cleaning brush, 86 control rod, 87 radial guide rod, 88 wheel frame, 89 roller, 810 concentric ring, 811 arc protrusion. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] For example, see Figures 1 to 10 , this embodiment provides a technical solution: a trace element composite premix granulation and screening device, including a base plate 1, and also includes a debris screening speed control mechanism 2, a multi-stage screening mechanism 3, a screen drum radial vibration mechanism 4 and a screen drum lifting and transfer mechanism 6; The debris screening speed control mechanism 2 includes a tilt control component and a tilt rectangular frame 23, and the upper side of the seat plate 1 is installed with the tilt rectangular frame 23 through the tilt control component; The tilt control assembly includes a support rod 21, a control shaft 22, a movable seat 1 24, an electric telescopic rod 25, a movable seat 26, and a movable shaft 27. Two support rods 21 are fixedly connected to the left and right sides of the middle of the seat plate 1 respectively. The tops of the two support rods 21 are rotatably connected to two horizontal control shafts 22 through the installation bearings. The two control shafts 22 are fixedly connected to the middle of the left and right sides of the tilted rectangular frame 23 respectively. The middle of the front end of the tilted rectangular frame 23 is fixedly connected with a movable seat 1 24. The movable seat 1 24 is movably connected to the top of the electric telescopic rod 25 through the movable shaft 27. The bottom end of the electric telescopic rod 25 is movably connected to the movable seat 26 through the movable shaft 27. The movable seat 26 is fixed to the top of the front end of the seat plate 1. The telescopic electric telescopic rod 25 can drive the tilted rectangular frame 23 to move relative to the control shaft 22, thereby changing the tilt state of the tilted rectangular frame 23. When in use, the tilted rectangular frame 23 is in a tilted state with the front lower and the back higher, and the tilt angle is controlled by the electric telescopic rod 25.

[0021] The multi-stage screening mechanism 3 includes a rotating sleeve 31, a prism 32, a bearing 33, a standard particle screening component, a debris screening component and a screen drum rotating power component. The rear side of the inclined rectangular frame 23 is connected to three longitudinal rotating sleeves 31 by the bearing 33 in a horizontally equidistant rotation. The three rotating sleeves 31 are all connected to the screen drum rotating power component. A prism 32 is longitudinally slidably connected in each rotating sleeve 31. The front end of the middle prism 32 is connected to the debris screening component, and the front ends of the left and right prisms 32 are respectively connected to two standard particle screening components. The screen drum rotating power assembly includes a synchronous gear 312, a motor bracket 313, a screening motor 314 and a driving gear 315. Three synchronous gears 312 are respectively installed on the outside of the three rotating sleeves 31. Two adjacent synchronous gears 312 are meshed and connected. The screening motor 314 is installed on the rear bottom of the inclined rectangular frame 23 through the motor bracket 313. The output shaft of the screening motor 314 is fixedly connected with the driving gear 315, and the driving gear 315 is meshed and connected with one of the synchronous gears 312. The motor bracket 313 is used to install the screening motor 314. The working of the screening motor 314 drives the driving gear 315 to rotate, and the driving gear 315 drives one of the synchronous gears 312 to rotate. Due to the meshing relationship of the three synchronous gears 312, the synchronous gear 312 in the middle rotates clockwise, and the two synchronous gears 312 on the left and right rotate counterclockwise.

[0022] The standard grain screening component includes a standard grain screen cylinder 34, standard grain screen holes 35, an inner shaft 36, a spoke rod 37, a rear-feeding spiral blade 38 and a feed cone 39. The front ends of the left and right prisms 32 are respectively fixedly connected to the rear ends of the two inner shafts 36. Each inner shaft 36 is connected to the inner wall of the standard grain screen cylinder 34 through a spoke rod 37. The inner shaft 36 coincides with the center of the standard grain screen cylinder 34. The standard grain screen cylinder 34 is provided with standard grain screen holes 35. The inner wall of the standard grain screen cylinder 34 is provided with a rear-feeding spiral blade 38. The front end of the standard grain screen cylinder 34 is connected to the rear end of the feed cone 39. The front end diameter of the feed cone 39 is smaller than the rear end diameter. The left and right prisms 32 drive the two standard particle sieve cylinders 34 to rotate counterclockwise through the inner shaft 1 36 and the spoke 1 37. The particles to be screened enter the front end of the standard particle sieve cylinder 34 through the feed cone 39. The shape of the feed cone 39 promotes the particles to be screened in the feed cone 39 to enter the front end of the standard particle sieve cylinder 34. The counterclockwise rotation of the standard particle sieve cylinder 34 also drives the backward spiral blade 38 to rotate counterclockwise. The rotating backward spiral blade 38 transports the particles to be screened accumulated at the front end of the standard particle sieve cylinder 34 backward. As the particles to be screened move backward and the standard particle sieve cylinder 34 rotates, the standard particles to be screened fall through the standard particle sieve holes 35, and the particles oversized are transported backward along the backward spiral blade 38 until they are discharged from the rear end of the standard particle sieve cylinder 34.

[0023] The debris screening assembly includes an inner shaft 2 310, a spoke rod 2 311, a debris screen cylinder 316 and debris screen holes 317. The front end of the middle prism 32 is fixedly connected to the rear end of the inner shaft 2 310. The inner shaft 2 310 is connected to the inner wall of the debris screen cylinder 316 through the spoke rod 2 311. The center of the inner shaft 2 310 coincides with the center of the debris screen cylinder 316. The debris screen cylinder 316 is located between the two standard particle screen cylinders 34, and the two sides of the debris screen cylinder 316 are in rolling contact with the two standard particle screen cylinders 34 respectively. The debris screen cylinder 316 is provided with debris screen holes 317. The prism 32 in the middle drives the debris screen drum 316 to rotate clockwise through the inner shaft 2 310 and the spoke rod 2 311, and the particles to be screened are sent into the debris screen drum 316 from the rear end of the debris screen drum 316. Since the debris screen drum 316 is tilted low at the front and high at the back, the particles to be screened move forward along the bottom of the debris screen drum 316. As the debris screen drum 316 rotates, the debris in the particles to be screened falls through the debris screen holes 317, completing the screening of the debris in the particles to be screened, and the particles to be screened with the debris removed are discharged from the front bottom of the debris screen drum 316.

[0024] The multi-stage screening mechanism 3 also includes a standard grain sieve hole cleaning protrusion 318, and the outer peripheral side of the debris screen cylinder 316 is provided with a standard grain sieve hole cleaning protrusion 318 corresponding to the standard grain sieve hole 35. The particles of feed pelletization are generally cylindrical, and the feed particles will inevitably get stuck in the standard grain sieve hole 35. After a long time, the screening effect of the standard grain sieve cylinder 34 on the standard particles will decrease. The standard grain sieve hole cleaning protrusion 318 is provided. When the debris screen cylinder 316 and the standard grain sieve cylinder 34 rotate in opposite directions, the standard grain sieve hole cleaning protrusion 318 extends into the standard grain sieve hole 35, and the particles stuck in the standard grain sieve hole 35 can be squeezed back into the interior of the standard grain sieve cylinder 34. There is no need to stop the machine to clean the standard grain sieve hole 35 during screening, which is conducive to improving the screening efficiency of feed particles.

[0025] Specifically, a plurality of groups of standard grain sieve holes 35 are provided in an annular array on the standard grain sieve cylinder 34, and each group of standard grain sieve holes 35 includes a plurality of standard grain sieve holes 35 equidistantly distributed along the axial direction of the standard grain sieve cylinder 34. The number of groups of standard grain sieve holes 35 and the number of standard grain sieve holes 35 in each group of standard grain sieve holes 35 are determined according to demand. The size of the debris sieve cylinder 316 is the same as the size of the standard grain sieve cylinder 34, and a plurality of groups of standard grain sieve hole cleaning protrusions 318 are provided in an annular array on the outer peripheral side of the debris sieve cylinder 316. Each group of standard grain sieve hole cleaning protrusions 318 includes a plurality of standard grain sieve hole cleaning protrusions 318 equidistantly distributed along the axial direction of the debris sieve cylinder 316. The number of groups of standard grain sieve hole cleaning protrusions 318 is the same as the number of groups of standard grain sieve holes 35, and the number of standard grain sieve hole cleaning protrusions 318 in each group of standard grain sieve hole cleaning protrusions 318 is the same as the number of standard grain sieve holes 35 in each group of standard grain sieve holes 35.

[0026] The debris sieve holes 317 are evenly distributed on the debris sieve cylinder 316 , and at the same time, the debris sieve holes 317 are staggered with the standard grain sieve hole cleaning protrusions 318 to prevent the standard grain sieve hole cleaning protrusions 318 from blocking the debris sieve holes 317 .

[0027] The radial vibration mechanism 4 of the screen drum is installed at the rear end of the inclined rectangular frame 23, and the radial vibration mechanism 4 of the screen drum is connected to the rear ends of the three prisms 32; The radial vibration mechanism 4 of the screen drum includes a synchronization rod 41, a reset spring 42, a mounting frame 43, a wear-resistant wheel 44, a working motor 45, and a cam 46. The rear ends of the three prisms 32 are fixedly connected to the synchronization rod 41 by a screw. The rear side of the synchronization rod 41 is fixedly connected to the mounting frame 43. The rear end of the mounting frame 43 is rotatably connected to the wear-resistant wheel 44. The motor bracket 313 is fixedly connected to the working motor 45. The output shaft at the top of the working motor 45 is fixedly connected to the cam 46. The front side of the cam 46 is rollingly connected to the rear side of the wear-resistant wheel 44. The column section of the prism 32 located between the synchronization rod 41 and the rotating sleeve 31 is sleeved with the reset spring 42. The working motor 45 drives the cam 46 to rotate. When the cam 46 The raised portion of the cam 46 rolls in contact with the wear-resistant wheel 44, and the synchronous rod 41 is pushed forward through the wear-resistant wheel 44 and the mounting bracket 43. The synchronous rod 41 drives the three prisms 32 to move forward relative to the rotating sleeve 31. At this time, the reset spring 42 is compressed, and the raised portion of the cam 46 gradually separates from the rear side of the wear-resistant wheel 44. At this time, the reset spring 42 rebounds and stretches, pushing the synchronous rod 41 to drive the three prisms 32 to move backward relative to the rotating sleeve 31, thereby driving the three prisms 32 to move back and forth when rotating. With the rotation of the working motor 45, the standard particle screen cylinder 34 and the debris screen cylinder 316 can be driven to vibrate back and forth at high frequency through the three prisms 32, thereby promoting the screening effect of the standard particle screen cylinder 34 and the debris screen cylinder 316.

[0028] The screen drum lifting and transferring mechanism 6 is installed on the seat plate 1 , and the screen drum lifting and transferring mechanism 6 is arranged corresponding to the inner front end of the inclined rectangular frame 23 .

[0029] The screen drum lifting and transferring mechanism 6 includes a material box 61, a receiving hopper 62, a distribution box 66, a steel wire flexible pipe 68, a transfer port 69, a lifting component and a transfer port mounting frame. A receiving hopper 62 is provided on the seat plate 1 at a position corresponding to the front end of the debris screen drum 316. The front side of the receiving hopper 62 is connected to the material box 61, and the top of the material box 61 is connected to the distribution box 66 through a lifting component. The left and right sides of the distribution box 66 are respectively connected to two transfer ports 69 through two steel wire flexible pipes 68. The two transfer ports 69 are respectively installed on the inner side of the inclined rectangular frame 23 through the transfer port mounting frame, and the rear ends of the two transfer ports 69 respectively extend into the inner side of the front end of the two feed cones 39.

[0030] The lifting assembly includes a lifting cylinder 63, a conveying shaft 64, a lifting spiral blade 65, and a conveying motor 67. A vertical lifting cylinder 63 is inserted in the middle of the material box 61. The top of the lifting cylinder 63 is connected to the bottom end of the distribution box 66. The top of the distribution box 66 is fixedly connected to the conveying motor 67. The output shaft at the bottom of the conveying motor 67 is fixedly connected to the top of the conveying shaft 64. The conveying shaft 64 passes through the center of the distribution box 66 and the lifting cylinder 63 in turn. The outer peripheral side of the conveying shaft 64 located in the lifting cylinder 63 is provided with a lifting spiral blade 65. The conveying motor 67 drives the conveying shaft 64 and the lifting spiral blade 65 to rotate. The lifting spiral blade 65 cooperates with the lifting cylinder 63 to lift the particles to be screened in the material box 61 into the distribution box 66.

[0031] The transfer port mounting frame includes a positioning ring 610 and a bracket 611. Two positioning rings 610 are fixedly sleeved on the outer peripheral sides of the front ends of the two transfer ports 69. The sides of each positioning ring 610 are fixedly connected with a bracket 611. The bracket 611 is fixedly installed on the inner side of the inclined rectangular frame 23 by screw 2. As the inclined rectangular frame 23 is adjusted in inclination, the transfer port 69 can always be aligned with the front end of the feed cone 39.

[0032] The particles to be screened discharged from the bottom of the front end of the debris screen cylinder 316 are collected in the material box 61 through the receiving hopper 62, and the particles to be screened in the material box 61 are lifted to the distribution box 66 by the lifting assembly, and then sent into the two feed cones 39 through two steel wire flexible pipes 68 and two transfer ports 69. The transfer port mounting frame positions the transfer port 69 so that the transfer port 69 is aligned with the front end opening of the feed cone 39. When the feed cone 39 vibrates back and forth with the standard particle screen cylinder 34, it does not affect the transfer port 69 from transporting the particles to be screened into the feed cone 39.

[0033] When in use, the tilt control component is used to control the tilt state of the tilted rectangular frame 23, so that the tilted rectangular frame 23 is in a tilted state with the front lower and the back higher. The tilt control component is also used to control the tilt angle of the tilted rectangular frame 23. The larger the tilt angle of the tilted rectangular frame 23, the faster the speed at which the particles to be screened pass through the debris screening component. At this time, the screening effect for the debris in the particles to be screened is reduced. The smaller the tilt angle of the tilted rectangular frame 23, the slower the speed at which the particles to be screened pass through the debris screening component. At this time, the screening effect for the debris in the particles to be screened is improved. Therefore, it is necessary to adjust the tilted rectangular frame 23 to be at a suitable tilt angle to ensure that the particles to be screened can completely screen out the debris when passing through the debris screening component, while maintaining a faster passing speed, taking into account both the screening effect and the screening speed. The screen drum rotating power assembly is used to drive the three rotating sleeves 31 to rotate relative to the inclined rectangular frame 23. The three rotating sleeves 31 will drive the three prisms 32 to rotate. The three prisms 32 can drive the two standard particle screening assemblies and the debris screening assembly to rotate. The rotating two standard particle screening assemblies and the debris screening assembly can improve the screening effect of the particles to be screened. The screen drum radial vibration mechanism 4 is used to drive the three prisms 32 to move back and forth at high frequency. Due to the sliding connection between the prisms 32 and the rotating sleeves 31, the three prisms 32 also vibrate back and forth while rotating. The three prisms 32 can drive the two standard particle screening assemblies and the debris screening assembly to vibrate back and forth at high frequency, so that the two standard particle screening assemblies and the debris screening assembly can better screen the feed particles and promote feed. The material particles pass through the sieve holes on the standard particle screening component and the debris screening component smoothly and quickly. The particles to be screened are first sent into the debris screening component. As the debris screening component rotates, the particles to be screened also roll forward. The debris in the particles to be screened is screened and falls off, and then the particles to be screened fall from the front end of the debris screening component to the screen drum lifting and transferring mechanism 6, and then are sent to the rear ends of the two standard particle screening components by the screen drum lifting and transferring mechanism 6. The two standard particle screening components transport the particles to be screened backwards as they rotate. At the same time, the standard particles in the particles to be screened are screened and fall off, and the remaining oversized particles in the standard particle screening component are discharged from the rear end of the standard particle screening component, completing the screening of debris, standard particles and oversized particles.

[0034] For example 2, please refer to Figures 1 to 10 This embodiment provides a technical solution: a trace element composite premix granulation and screening device. The structure of this embodiment is roughly the same as that of the first embodiment, except that: It also includes a feeding mechanism 5 and a screening material collecting mechanism 7. The feeding mechanism 5 is installed at the top of the rear side of the inclined rectangular frame 23, and the bottom end of the feeding mechanism 5 extends into the top of the inner side of the rear end of the debris screen cylinder 316. The screening material collecting mechanism 7 is installed below the inclined rectangular frame 23. The feed particles produced by the granulator fall into the feeding mechanism 5, and then are transferred to the debris screen cylinder 316 through the feeding mechanism 5. The standard particles falling from the standard particle screen hole 35, the debris falling from the debris screen hole 317, and the over-standard particles discharged from the rear end of the standard particle screen cylinder 34 will fall on the screening material collecting mechanism 7 for classification and collection.

[0035] Specifically, the feeding mechanism 5 includes a bent frame 51, a feeding hopper 52, and a conveying channel 53. The top of the rear side of the inclined rectangular frame 23 is fixedly connected to the bent frame 51 by three screws. The feeding hopper 52 is arranged on the bent frame 51. The bottom of the feeding hopper 52 is arranged with a conveying channel 53. The bottom end of the conveying channel 53 extends into the top of the inner rear end of the debris screen cylinder 316. The particles to be screened are fed into the feeding hopper 52. The particles to be screened in the feeding hopper 52 are fed into the rear end of the debris screen cylinder 316 by the conveying channel 53 to start the screening work.

[0036] The screening material collecting mechanism 7 includes a mounting bracket 1 71, a standard particle collecting slot 72, a debris collecting slot 73, a mounting bracket 2 74, and an over-standard particle collecting slot 75. Two standard particle collecting slots 72 are arranged below the two standard particle sieve cylinders 34. The two standard particle collecting slots 72 are inclined with the front lower and the back higher. The sides of each standard particle collecting slot 72 are respectively fixedly connected to two mounting brackets 1 71. The ends of the mounting brackets 1 71 are fixed to the sides of the inclined rectangular frame 23 by screws 4. The standard particles sieved out by the standard particle sieve cylinder 34 fall onto the standard particle collecting slot 72, and then roll forward and gather. A debris collecting slot 73 is arranged between the two standard particle collecting slots 72. The debris collecting slot 73 is located directly below the debris sieve cylinder 316. The front height of the debris collecting slot 73 is The debris collecting groove 73 is tilted at a relatively large angle and will not change its high-front-low-back state due to the movement of the tilted rectangular frame 23. The debris screen drum 316 screens the fallen debris and falls into the debris collecting groove 73. The debris slides backward along the debris collecting groove 73 and gathers together. The left and right sides of the rear end of the tilted rectangular frame 23 are respectively fixedly connected to two mounting brackets 2 74 by screws 5. The two mounting brackets 2 74 are respectively fixedly connected to the front sides of the excessive particle collecting groove 75. The excessive particle collecting groove 75 is tilted at a relatively high-front-low-back position. The excessive particle collecting groove 75 is located below the rear ends of the two standard particle screen drums 34. The particles that do not pass through the standard particle sieve holes 35 are discharged from the rear end of the standard particle screen drum 34 and then fall into the excessive particle collecting groove 75, thereby completing the collection of the excessive particles.

[0037] For example 3, please refer to Figures 1 to 10 This embodiment provides a technical solution: a trace element composite premix granulation and screening device. The structure of this embodiment is roughly the same as that of the second embodiment, except that: The debris screen hole anti-blocking cleaning mechanism 8 is also included. The debris screen hole anti-blocking cleaning mechanism 8 includes a support plate 81, an axial rod 82, a radial guide column 83, a compression spring 84 and a cleaning brush 85. The upper side of the rear end of the inclined rectangular frame 23 is fixedly connected to the rear end of the axial rod 82 through the support plate 81. The axial rod 82 is distributed axially along the debris screen cylinder 316. Two radial guide columns 83 are slidably connected to the axial rod 82. The radial guide columns 83 are distributed radially along the debris screen cylinder 316. One end of the two radial guide columns 83 close to the debris screen cylinder 316 is fixedly connected to the cleaning brush 85. The bristles on the cleaning brush 85 are in contact with the outer side of the debris screen cylinder 316. The column section of the radial guide column 83 located between the cleaning brush 85 and the axial rod 82 is sleeved with a compression spring 84. The debris entering the debris screen hole 317 is small in size and can generally be removed by brushing the bristles on the cleaning brush 85. The compression spring 84 pushes the cleaning brush 85 close to the debris screen cylinder 316. As the debris screen cylinder 316 rotates, the debris in the debris screen hole 317 can be cleaned, and the debris screen cylinder 316 will vibrate back and forth, which can improve the cleaning effect of the debris in the debris screen hole 317.

[0038] The debris screen hole anti-blocking cleaning mechanism 8 also includes a control rod 86, a radial guide rod 87, a wheel frame 88, a roller 89, a concentric ring 810 and an arc protrusion 811. The ends of the two radial guide columns 83 away from the debris screen cylinder 316 are fixedly connected to the control rod 86, the rear end of the axial rod 82 is fixedly connected to one end of the radial guide rod 87, the radial guide rod 87 is parallel to the radial guide column 83, the radial guide rod 87 is slidably connected to the guide hole at the rear end of the axial rod 82, and the other end of the radial guide rod 87 is fixedly connected to the wheel frame 88, and the roller 89 is rotatably installed in the wheel frame 88. The front side of the middle synchronous gear 312 is fixedly connected to the concentric ring 810, the concentric ring 810 is concentrically arranged with the middle synchronous gear 312, the outer peripheral side of the concentric ring 810 is provided with an arc protrusion 811 in an annular array, and the outer peripheral side of the concentric ring 810 is rollingly connected to the bottom of the roller 89. When the synchronous gear 312 rotates, it can drive the concentric ring 810 to rotate. The arc protrusion 811 on the concentric ring 810 will lift the roller 89, allowing the radial guide rod 87 to slide along the axial rod 82. The radial guide rod 87 drives the radial guide column 83 away from the debris screen cylinder 316 through the control rod 86. At this time, the compression spring 84 is compressed. As the concentric ring 810 rotates, the roller 89 rolls over the arc protrusion 811. At this time, the compression spring 84 rebounds and stretches, pushing the radial guide column 83 close to the debris screen cylinder again. 316, whereby as the synchronous gear 312 and the debris screen cylinder 316 continue to rotate, the cleaning brush 85 can be driven to continuously approach and move away from the debris screen cylinder 316, and the bristles of the cleaning brush 85 are more easily inserted into the debris screen hole 317, which has a good cleaning effect on the debris screen hole 317. However, this method is also likely to accelerate the damage speed of the bristles on the cleaning brush 85, so it is necessary to increase the replacement frequency of the cleaning brush 85. Therefore, it is necessary to set the connection between the cleaning brush 85 and the radial guide column 83 to be a detachable structure or a quick-release structure.

[0039] For other embodiments, see Figures 1 to 10 The tilt control assembly includes an arc locking rod 28, a stud 29, and a butterfly nut 210. The sides of the two support rods 21 are respectively fixedly connected with two arc locking rods 28. The center of the circle where the arc locking rod 28 is located coincides with the axis of the control shaft 22. An arc through groove is provided at one end of the arc locking rod 28 away from the support rod 21. Two studs 29 are respectively fixedly connected to the left and right sides of the tilted rectangular frame 23. The two studs 29 pass through the two arc through grooves respectively, and a butterfly nut 210 is threadedly connected to one end of the stud 29 away from the tilted rectangular frame 23. By tightening the butterfly nut 210, the stud 29 and the arc locking rod 28 can be locked, thereby completing the locking of the tilted rectangular frame 23 to prevent the tilted rectangular frame 23 from changing its angle due to factors such as vibration. When the inclination of the tilted rectangular frame 23 needs to be adjusted, the butterfly nut 210 needs to be loosened.

[0040] See also Figures 1 to 10, an application method of a trace element composite premix granulation and screening device, comprising the following steps: Step 1: The tilt control component controls the tilted rectangular frame 23 to tilt in a low front and high back state, so that the debris screen drum 316 and the two standard particle screen drums 34 are in a tilted state with a low front and a high back state, and the screening motor 314 works, and drives the two standard particle screen drums 34 to rotate counterclockwise through the transmission of the driving gear 315 and the synchronous gear 312, and drives the debris screen drum 316 to rotate clockwise at the same time, and the screen drum radial vibration mechanism 4 drives the debris screen drum 316 and the two standard particle screen drums 34 to vibrate back and forth through the three prisms 32; Step 2: The particles to be screened are fed into the rear end of the debris screen drum 316 through the feeding mechanism 5, and the particles to be screened roll forward in the rotating debris screen drum 316, and the debris in the particles to be screened falls through the debris screen holes 317; Step 3: The particles to be screened that have been screened out of the debris fall into the receiving hopper 62, and then are lifted into the distribution box 66 by the lifting assembly, and then are sent into the two feeding cones 39 through two steel wire flexible pipes 68 and two transfer ports 69. The particles to be screened move backward in the standard particle screen cylinder 34 as the backward spiral blade 38 rotates. The standard particles in the particles to be screened fall through the standard particle screen holes 35, and the particles that do not pass through the standard particle screen holes 35 are discharged from the rear end of the standard particle screen cylinder 34; Step 4: the standard grain sieve hole cleaning protrusion 318 rotates with the debris sieve cylinder 316. When the standard grain sieve hole cleaning protrusion 318 moves to the position where the debris sieve cylinder 316 and the standard grain sieve cylinder 34 are close to each other, the standard grain sieve hole cleaning protrusion 318 extends into the corresponding standard grain sieve hole 35 on the standard grain sieve cylinder 34, squeezes out the particles stuck in the standard grain sieve hole 35, and completes the continuous cleaning work of the standard grain sieve hole 35; Step 5: As the debris screen drum 316 rotates, the bristles on the cleaning brush 85 contact the outer side of the debris screen drum 316 to clean the debris in the debris screen hole 317; the debris screen drum 316 will vibrate back and forth, which can improve the cleaning effect of the debris in the debris screen hole 317, and the synchronous gear 312 will drive the concentric ring 810 to rotate when it rotates. The arc protrusion 811 on the concentric ring 810 will lift the roller 89, allowing the radial guide rod 87 to slide along the axial rod 82, and the radial guide rod 87 drives the radial guide column 83 away from the debris through the control rod 86. The debris screen cylinder 316, at this time, the compression spring 84 is compressed, and with the rotation of the concentric ring 810, the roller 89 rolls over the arc protrusion 811, and the compression spring 84 rebounds and extends, pushing the radial guide column 83 again to approach the debris screen cylinder 316, thereby with the continuous rotation of the synchronous gear 312 and the debris screen cylinder 316, the cleaning brush 85 is driven to repeatedly approach and move away from the debris screen cylinder 316, and the bristles of the cleaning brush 85 are inserted into the debris screen hole 317 and then leave the debris screen hole 317, which has a good cleaning effect on the debris screen hole 317.

[0041] In order to realize intelligent monitoring and management equipment, an intelligent monitoring system can also be equipped, such as increasing monitoring components such as cameras and photoelectric sensors to monitor various parameters in the screening process in real time, such as screening speed, screening accuracy, equipment operation status, etc., which is conducive to the automatic collection, analysis and storage of production data, and provides strong support for production management; Through data analysis of various parameters, abnormal situations can be discovered and handled in a timely manner to avoid production accidents and improve production safety; This application uses efficient screening components, specifically standard particle screening components and debris screening components, which have unique movement modes and screening mechanisms, and can efficiently screen and grade the trace element composite premix particles. Not only does it improve the screening efficiency, it also ensures the screening accuracy, making the particle size distribution of the trace element composite premix particles more uniform.

[0042] Screening parameters such as screen aperture, screening time, etc. can be adjusted according to actual needs. The adjustment of the screen aperture requires changing the size of the standard particle screen hole 35 and the debris screen hole 317. The adjustment of the screening time requires changing the inclination of the inclined rectangular frame 23 with the help of the inclination control component to meet the quality requirements of different products. By adjusting the screening parameters, users can achieve more flexible and accurate production control.

[0043] Moreover, the present application is equipped with a resource recycling system, specifically a screening material collection mechanism 7, which can collect the screened debris and excessive particles, and recycle and reuse the waste generated during the screening process.

[0044] Through the recycling of resources, the equipment not only reduces production costs, but also reduces environmental pollution and realizes green production.

[0045] It can meet the screening needs of trace element composite premix particles of different types and properties.

[0046] It is worth noting that the electric telescopic rod 25, the screening motor 314, the working motor 45, and the conveying motor 67 disclosed in the above embodiments are all controlled by an external PLC controller, and the control method thereof adopts the method commonly used in the prior art.

[0047] In summary, the trace element composite premix granulation and screening equipment has significant effects in automation and efficient screening technology, and improves the quality and production efficiency of trace element composite premix products.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A trace element composite premix granulation and screening device, comprising a base plate (1), characterized in that: Also includes: The debris screening speed control mechanism (2) comprises a tilt control component and a tilt rectangular frame (23), wherein the tilt rectangular frame (23) is installed on the upper side of the seat plate (1) via the tilt control component; The multi-stage screening mechanism (3) comprises a rotating sleeve (31), a standard particle screening assembly and a debris screening assembly, wherein the rear side of the inclined rectangular frame (23) is rotatably connected to three longitudinal rotating sleeves (31) at equal intervals, the three rotating sleeves (31) are all connected to the screen drum rotating power assembly, each rotating sleeve (31) is longitudinally slidably connected to a prism (32), the front end of the middle prism (32) is connected to the debris screening assembly, and the front ends of the left and right prisms (32) are respectively connected to two standard particle screening assemblies; A sieve drum radial vibration mechanism (4) is installed at the rear end of the inclined rectangular frame (23), and the sieve drum radial vibration mechanism (4) is connected to the rear ends of the three prisms (32); The screen drum lifting and transferring mechanism (6) is mounted on the seat plate (1), and the screen drum lifting and transferring mechanism (6) is arranged corresponding to the inner front end of the inclined rectangular frame (23).

2. The trace element composite premix granulation and screening equipment according to claim 1, characterized in that: The screen drum rotating power assembly comprises a synchronous gear (312), three synchronous gears (312) are respectively installed on the outer sides of the three rotating sleeves (31), two adjacent synchronous gears (312) are meshedly connected, a screening motor (314) is installed on the rear bottom of the inclined rectangular frame (23) via a motor bracket (313), an output shaft of the screening motor (314) is fixedly connected to a driving gear (315), and the driving gear (315) is meshedly connected to one of the synchronous gears (312).

3. The trace element composite premix granulation and screening equipment according to claim 2, characterized in that: The standard grain screening component comprises a standard grain sieve cylinder (34), the front ends of the left and right prisms (32) are respectively fixedly connected to the rear ends of two inner shafts (36), each inner shaft (36) is connected to the inner wall of the standard grain sieve cylinder (34) via a spoke rod (37), the standard grain sieve cylinder (34) is provided with standard grain sieve holes (35), the inner wall of the standard grain sieve cylinder (34) is provided with a rearward conveying spiral blade (38), and the front end of the standard grain sieve cylinder (34) is connected to the rear end of a feed cone cylinder (39).

4. The trace element composite premix granulation and screening equipment according to claim 3, characterized in that: The debris screening assembly comprises a debris screen cylinder (316), the front end of the central prism (32) is fixedly connected to the rear end of the second inner shaft (310), the second inner shaft (310) is connected to the inner wall of the debris screen cylinder (316) via the second spoke rod (311), the debris screen cylinder (316) is located between two standard particle screen cylinders (34), and the debris screen cylinder (316) is provided with debris screen holes (317).

5. The trace element composite premix granulation and screening equipment according to claim 4, characterized in that: The multi-stage screening mechanism (3) further comprises a standard grain sieve hole cleaning protrusion (318), and the outer peripheral side of the debris sieve cylinder (316) is provided with a standard grain sieve hole cleaning protrusion (318) corresponding to the standard grain sieve hole (35).

6. The trace element composite premix granulation and screening equipment according to claim 4, characterized in that: The screen drum lifting and transfer mechanism (6) comprises a material box (61), a receiving hopper (62) is arranged on the base plate (1) at a position corresponding to the front end of the debris screen drum (316), the front side of the receiving hopper (62) is connected to the material box (61), the top of the material box (61) is connected to the distribution box (66) through a lifting assembly, the left and right sides of the distribution box (66) are respectively connected to two transfer ports (69) through two steel wire flexible pipes (68), the two transfer ports (69) are respectively installed on the inner side of the inclined rectangular frame (23) through a transfer port mounting frame, and the rear ends of the two transfer ports (69) respectively extend into the inner side of the front ends of the two feeding cones (39).

7. The trace element composite premix granulation and screening equipment according to claim 4, characterized in that: It also includes a feeding mechanism (5) and a screening material collecting mechanism (7), wherein the feeding mechanism (5) is mounted on the top of the rear side of the inclined rectangular frame (23), and the bottom end of the feeding mechanism (5) extends into the top of the inner side of the rear end of the debris screen cylinder (316), and the screening material collecting mechanism (7) is mounted below the inclined rectangular frame (23).

8. The trace element composite premix granulation and screening equipment according to claim 4, characterized in that: The invention also comprises a debris screen hole anti-blocking cleaning mechanism (8), wherein the debris screen hole anti-blocking cleaning mechanism (8) comprises a cleaning brush (85), the upper side of the rear end of the inclined rectangular frame (23) is fixedly connected to the rear end of an axial rod (82) via a support plate (81), the axial rod (82) is distributed along the axial direction of the debris screen cylinder (316), two radial guide pillars (83) are slidably connected to the axial rod (82), the radial guide pillars (83) are distributed along the radial direction of the debris screen cylinder (316), one end of the two radial guide pillars (83) close to the debris screen cylinder (316) is fixedly connected to the cleaning brush (85), the bristles on the cleaning brush (85) are in contact with the outer side of the debris screen cylinder (316), and the column section of the radial guide pillar (83) located between the cleaning brush (85) and the axial rod (82) is sleeved with a compression spring (84).

9. The trace element composite premix granulation and screening equipment according to claim 8, characterized in that: The debris screen hole anti-blocking cleaning mechanism (8) further comprises a concentric ring (810), one end of two radial guide pillars (83) away from the debris screen cylinder (316) is fixedly connected to a control rod (86), the rear end of the axial rod (82) is fixedly connected to one end of a radial guide rod (87), the radial guide rod (87) is parallel to the radial guide pillar (83), the radial guide rod (87) is slidably connected to a guide hole at the rear end of the axial rod (82), and the other end of the radial guide rod (87) is fixedly connected to a wheel frame (88), a roller (89) is rotatably mounted in the wheel frame (88), a concentric ring (810) is fixedly connected to the front side of the middle synchronous gear (312), the concentric ring (810) and the middle synchronous gear (312) are arranged concentrically, an outer peripheral side of the concentric ring (810) is provided with an annular array of arc protrusions (811), and the outer peripheral side of the concentric ring (810) is rollingly connected to the bottom of the roller (89).

10. An application method of a trace element composite premix granulation and screening device, applied to the trace element composite premix granulation and screening device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: The tilt control component controls the tilted rectangular frame (23) to tilt in a manner that the front is low and the rear is high, so that the debris screen cylinder (316) and the two standard particle screen cylinders (34) are both in a tilted state that the front is low and the rear is high, and the screening motor (314) works to drive the two standard particle screen cylinders (34) to rotate counterclockwise through the transmission of the driving gear (315) and the synchronous gear (312), and at the same time drives the debris screen cylinder (316) to rotate clockwise, and the screen cylinder radial vibration mechanism (4) drives the debris screen cylinder (316) and the two standard particle screen cylinders (34) to vibrate forward and backward through the three prisms (32); Step 2: The particles to be screened are fed into the rear end of the debris screen drum (316) through the feeding mechanism (5); the particles to be screened roll forward in the rotating debris screen drum (316), and the debris in the particles to be screened falls through the debris screen holes (317); Step 3: the particles to be screened that have been screened out of debris fall into the receiving hopper (62), are then lifted into the distribution box (66) by the lifting assembly, and are then fed into two feeding cones (39) through two steel wire flexible pipes (68) and two transfer ports (69). The particles to be screened move backward in the standard particle screen cylinder (34) as the backward feeding spiral blade (38) rotates. The standard particles in the particles to be screened fall through the standard particle screen holes (35), and the particles that do not pass through the standard particle screen holes (35) are discharged from the rear end of the standard particle screen cylinder (34); Step 4: the standard grain sieve hole cleaning protrusion (318) rotates with the debris sieve cylinder (316). When the standard grain sieve hole cleaning protrusion (318) moves to a position where the debris sieve cylinder (316) and the standard grain sieve cylinder (34) are close to each other, the standard grain sieve hole cleaning protrusion (318) extends into the corresponding standard grain sieve hole (35) on the standard grain sieve cylinder (34), squeezes out the particles stuck in the standard grain sieve hole (35), and completes the continuous cleaning of the standard grain sieve hole (35); Step five: as the debris screen cylinder (316) rotates, the bristles on the cleaning brush (85) come into contact with the outer side of the debris screen cylinder (316) to clean the debris in the debris screen holes (317).

Images