Feed processing pretreatment equipment with multi-layer filtering function

Abstract

The invention discloses feed processing pretreatment equipment with a multi-layer filtering function, and relates to the technical field of crushing, the feed processing pretreatment equipment comprises a rack, a crushing mechanism, a filtering mechanism and a backflow mechanism, the crushing mechanism is fixedly connected with the rack, the crushing mechanism is used for crushing raw materials, the filtering mechanism is fixedly connected with the rack, and the backflow mechanism is used for backflow of the filtering mechanism. The filtering mechanism is used for screening the crushed raw materials, the backflow mechanism is fixedly connected with the rack, and the backflow mechanism is used for conveying substandard raw materials into the crushing mechanism; the rack is used for providing a mounting basis for all the mechanisms, raw materials needing to be crushed fall into the filtering mechanism after being crushed by the crushing mechanism, the filtering mechanism can filter out overlarge particles and oversmall particles after crushing, the overlarge particles return to the crushing mechanism through the backflow mechanism for secondary crushing, and therefore the crushing quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of crushing, in particular to feed processing pretreatment equipment with multi-layer filtering function. Background Art

[0002] Feed processing pretreatment equipment is used to process and adjust raw feed to improve the quality and palatability of feed. The raw materials are crushed by crushing equipment to make them easier to digest and absorb, thereby improving the nutritional value of feed.

[0003] However, the existing feed processing and pretreatment equipment does not have a corresponding filtering mechanism to screen the crushed feed when crushing the raw materials, resulting in inconsistent feed particle sizes after crushing, requiring subsequent screening operations, which is time-consuming and labor-intensive, and has low production efficiency; in addition, for different types of feed, the crushed particle size requirements are inconsistent, and the filter mesh aperture of the existing filtering mechanism is fixed. When crushing feeds of different particle sizes, it is often necessary to replace the filter mesh with the corresponding aperture, and the filter mesh aperture cannot be automatically adjusted according to the particle size of the feed. Summary of the invention

[0004] The purpose of the present invention is to provide a feed processing pretreatment device with a multi-layer filtering function to solve the problems raised in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: the feed processing pretreatment equipment includes a frame, a crushing mechanism, a filtering mechanism and a reflux mechanism, the crushing mechanism is tightly connected to the frame, the crushing mechanism is used to crush the raw materials, the filtering mechanism is tightly connected to the frame, the filtering mechanism is used to screen the crushed raw materials, the reflux mechanism is tightly connected to the frame, and the reflux mechanism is used to transport the raw materials that do not meet the standards to the crushing mechanism.

[0006] The frame is used to provide an installation basis for each mechanism. The raw materials to be crushed are crushed by the crushing mechanism and then fall into the filtering mechanism. The filtering mechanism can filter out the oversized particles and undersized particles after crushing. The oversized particles are returned to the crushing mechanism through the reflux mechanism for secondary crushing, thereby improving the crushing quality.

[0007] Furthermore, a feed inlet, a coarse material outlet, a discharge port and a fine material outlet are sequentially arranged on the frame along the material conveying direction; the crushing mechanism includes a fixed roller, a movable roller, a first motor, a second motor, a sliding bearing seat and an adjusting assembly; the fixed roller is rotatably connected to the frame, the first motor is tightly connected to the frame, the output end of the first motor is drivingly connected to the fixed roller, a guide groove is provided on the frame, the sliding bearing seat is slidably connected to the guide groove, the movable roller is rotatably connected to the sliding bearing seat, the second motor is tightly connected to the sliding bearing seat, the output end of the second motor is drivingly connected to the movable roller, the adjusting assembly is tightly connected to the frame, and the adjusting assembly is used to control the position of the sliding bearing seat.

[0008] The raw materials enter the crushing mechanism from the feed port for crushing. After the crushed raw materials are filtered by the filtering mechanism, the oversized particles are discharged through the coarse material outlet, the qualified particles are discharged through the discharge port, and the overfine particles are discharged through the fine material outlet. The first motor and the second motor are used to drive the fixed roller and the movable roller to rotate, and the raw materials are crushed by the relative rotation between the fixed roller and the movable roller. The raw materials are compressed, crushed and sheared by extrusion and friction, and finally achieve the desired crushing effect. Different raw materials require different crushing particle sizes, and the smaller the spacing between the fixed roller and the movable roller, the smaller the crushed particle size, and the position of the fixed roller is fixed. The crushed particle size can be adjusted by driving the sliding bearing seat to slide left and right along the guide groove by the adjustment component. When the sliding bearing seat moves to one side of the fixed roller, the smaller the spacing between the fixed roller and the movable roller, the smaller the crushed particle size, and vice versa. The spacing between the fixed roller and the movable roller is adjusted by the adjustment component to achieve automatic control of the crushed particle size.

[0009] Furthermore, the adjustment component includes a hydraulic cylinder, a piston and a liquid guide tube. The hydraulic cylinder is tightly connected to the inner wall of the guide groove. The output end of the hydraulic cylinder is transmission-connected to the sliding bearing seat. The piston is tightly connected to the sliding bearing seat. The piston is located on the sliding bearing seat at one end away from the hydraulic cylinder. An active chamber is provided on the frame. The piston is slidingly connected to the active chamber. Hydraulic oil is filled in the active chamber. One end of the liquid guide tube is connected to the active chamber, and the other end of the liquid guide tube is connected to the filtering mechanism.

[0010] The hydraulic cylinder is the main power source of the adjustment component. When the crushed particle size needs to be reduced, the hydraulic cylinder is started to drive the sliding bearing seat to move along the guide groove toward the side of the fixed roller, that is, to drive the moving roller close to the fixed roller, so that the distance between the fixed roller and the moving roller becomes smaller, thereby reducing the crushed particle size; at the same time, when the sliding bearing seat moves, it will also drive the piston to move along the active cavity to the same side, thereby pressing the hydraulic oil in the active cavity into the liquid guide tube, and using the pressure transmitted by the liquid guide tube to drive the filter mechanism to move, thereby changing the size of the filter mesh in the crushing mechanism, and realizing automatic adjustment of the size of the filter mesh according to the size of the crushed particles.

[0011] Furthermore, the filtering mechanism includes a coarse filter screen and a variable filter screen assembly, which are arranged obliquely, the mesh holes on the coarse filter screen are larger than the mesh holes of the variable filter screen assembly, the lower end of the coarse filter screen faces the coarse material outlet, and the lower end of the variable filter screen assembly faces the discharge port.

[0012] The raw materials after crushing may be incompletely crushed, resulting in a certain amount of oversized particles and some uncrushed gravel mixed in the crushed particles; the inclined coarse filter and variable filter assembly can guide the falling crushed particles, so that the particles slide from the corresponding outlets under the action of their own gravity, and because the mesh holes on the coarse filter are larger than the mesh holes of the variable filter assembly, the oversized particles and gravel flow out from the coarse material outlet under the obstruction of the coarse filter, the qualified particles flow out from the discharge port under the obstruction of the variable filter assembly, and the oversized particles slide through the mesh holes of the variable filter assembly to the fine material outlet. That is, multi-layer filtration of the crushed raw materials is achieved through the coarse filter and the variable filter assembly, and the crushed particles are divided into three parts according to the particle size, which is convenient for subsequent processing.

[0013] Furthermore, the variable filter assembly includes a fixed filter, a movable filter and a support spring. A snap-in groove and a sliding groove are also provided on the frame. The fixed filter is snap-into the snap-in groove, the movable filter is slidably connected to the sliding groove, the sliding groove is connected to the liquid guide tube, one end of the support spring is fastened to the inner wall of the sliding groove, and the other end of the support spring is fastened to the movable filter. The mesh holes on the fixed filter and the movable filter are arranged alternately.

[0014] By staggering the mesh holes on the fixed filter and the movable filter, the actual mesh size of the variable filter assembly is the overlapped portion of the mesh holes on the fixed filter and the movable filter. By adjusting the relative positions of the movable filter and the fixed filter, the size of the actual mesh hole can be adjusted. The fixed filter is fixed to the frame through the snap-in groove, and the movable filter can slide along the sliding groove. When the crushed particle size needs to be reduced, the movable roller moves toward the fixed roller under the drive of the hydraulic cylinder, that is, the distance between the movable roller and the fixed roller is reduced, and when the sliding bearing seat moves under the drive of the hydraulic cylinder, it will also drive the piston to move along the movable cavity to the same side, thereby pressing the hydraulic oil in the movable cavity into the liquid guide tube, and the hydraulic oil can The pressure is transmitted to the sliding groove, thereby driving the movable filter to move to one side, the supporting spring is compressed, the overlapping part of the mesh holes on the fixed filter and the movable filter is reduced, and the actual mesh size is also reduced; when the crushed particle size needs to be increased, the distance between the movable roller and the fixed roller is increased, and the piston moves away from the fixed roller under the drive of the hydraulic cylinder. Under the transmission action of the hydraulic pressure, the movable filter will slide upward along the sliding groove, the overlapping part of the mesh holes on the fixed filter and the movable filter is increased, and the actual mesh size is also increased; that is, the mesh size of the variable filter assembly is automatically adjusted according to the size of the crushed particle size, without the need to replace the filter, thereby improving the crushing efficiency.

[0015] Furthermore, the reflux mechanism includes a connecting bin, a feeding fan, a spiral tube, a distribution bin, a collecting bin and a reflux tube. The connecting bin is connected to the coarse material outlet, the feeding fan is firmly connected to the frame, the inlet of the feeding fan is connected to the connecting bin, the outlet of the feeding fan is connected to the spiral tube, the outlet of the spiral tube is connected to the distribution bin, the distribution bin is firmly connected to the frame, a first chamber and a second chamber are provided in the distribution bin, the first chamber is connected to the outer circle of the spiral tube outlet, the second chamber is connected to the inner circle of the spiral tube outlet, the collecting bin is connected to the first chamber, the reflux tube is connected to the second chamber, and the outlet of the reflux tube is arranged at an angle.

[0016] Oversized particles and gravel fall into the connecting bin from the coarse material outlet. Under the action of the feeding fan, the objects in the connecting bin will be transported into the spiral tube and move along the spiral tube. Under the action of centrifugal force, the gravel with larger mass is subjected to greater centrifugal force and will be distributed on the outer ring of the spiral tube, while the feed particles with lighter mass will be distributed on the inner ring of the spiral tube. Therefore, the gravel will fall into the first chamber and then enter the collecting bin, that is, the gravel in the raw material is separated; oversized particles will fall into the second chamber and then flow into the return pipe. The return pipe can transport the large particles back to the crushing mechanism for secondary crushing, and the outlet of the inclined return pipe can guide the large particles to the surface of the fixed roller and the movable roller, flush the surface of the fixed roller and the movable roller, and remove the objects adhering to the roller surface during the crushing process, so as to keep the crushing surface clean; that is, the gravel in the crushed material is separated by the spiral tube, and the surface of the fixed roller and the movable roller is self-cleaned through the inclined return pipe outlet, thereby improving the crushing quality.

[0017] Furthermore, the spiral diameter of the spiral tube gradually decreases.

[0018] By gradually reducing the spiral diameter of the spiral tube, the rotation radius of the object in the tube is reduced, and the centrifugal force on large particles of feed and gravel is increased, thereby improving the separation effect.

[0019] Furthermore, the surfaces of the fixed roller and the movable roller are both provided with crushing teeth, and the fixed roller and the movable roller rotate in opposite directions.

[0020] The fixed roller and the movable roller crush objects by relative rotation between them, and the crushing teeth can improve the crushing efficiency.

[0021] Furthermore, a guide block is provided on the return pipe, and the cross section of the guide block is triangular.

[0022] The reflux pipe is arranged between the fixed roller and the movable roller. The triangular guide block can guide the raw materials entering from the feed port, so that the raw materials are evenly distributed on the surface of the fixed roller and the movable roller, thereby improving the crushing efficiency; in addition, the guide block cooperates with the inclined outlet on the reflux pipe to collide the particles returned after crushing with the raw materials, so that the raw materials are subjected to additional impact force, which has the effect of pre-crushing.

[0023] Compared with the prior art, the present invention has the following beneficial effects: 1. The size of the crushed particles can be adjusted by driving the sliding bearing seat to slide left and right along the guide groove through the adjustment component. When the sliding bearing seat moves toward the fixed roller, the smaller the distance between the fixed roller and the movable roller, the smaller the crushed particle size, and vice versa. By adjusting the distance between the fixed roller and the movable roller through the adjustment component, the size of the crushed particle size can be automatically controlled.

[0024] 2. When it is necessary to reduce the crushed particle size, the movable roller moves toward the fixed roller under the drive of the hydraulic cylinder, that is, the distance between the movable roller and the fixed roller is reduced, and when the sliding bearing seat moves under the drive of the hydraulic cylinder, it will also drive the piston to move along the movable chamber to the same side, thereby pressing the hydraulic oil in the movable chamber into the liquid guide tube. The hydraulic oil can transfer the pressure to the sliding groove, thereby driving the movable filter to move to one side, and the supporting spring is compressed. The overlapping part of the mesh on the fixed filter and the movable filter is reduced, and the actual mesh size is also reduced, that is, the mesh size of the variable filter assembly is automatically adjusted according to the size of the crushed particle size, without the need to replace the filter, thereby improving the crushing efficiency.

[0025] 3. The crushed stones in the crushed materials are separated through the spiral tube, and the surfaces of the fixed roller and the movable roller are self-cleaned through the inclined return pipe outlet, thereby improving the crushing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a partial cross-sectional view of the present invention; Figure 3 It is a schematic diagram of the crushing mechanism of the present invention; Figure 4 It is a schematic diagram of the adjustment component of the present invention; Figure 5 for Figure 4 A local enlarged view of point A; Figure 6 It is a schematic diagram of the reflux mechanism of the present invention; Figure 7 for Figure 6 A partial enlarged view of point B; Figure 8 is a schematic diagram of a variable filter assembly; Fig. 9 for Figure 8 A partial enlarged view of point C; Fig.10 for Figure 8 A partial enlarged view of point D; Fig.11 A cross-sectional view of the flow guide tube.

[0027] In the figure: 1-frame, 11-feed port, 12-coarse material outlet, 13-discharge port, 14-fine material outlet, 15-guide groove, 16-active cavity, 17-clamping groove, 18-sliding groove, 2-crushing mechanism, 21-fixed roller, 22-moving roller, 23-first motor, 24-second motor, 25-sliding bearing seat, 26-adjusting component, 261-hydraulic cylinder, 262-piston, 263-liquid guide tube, 3-filtering mechanism, 31-coarse filter screen, 32-variable filter screen assembly, 321-fixed filter screen, 322-active filter screen, 323-support spring, 4-reflux mechanism, 41-connecting bin, 42-feeding fan, 43-spiral tube, 44-distribution bin, 441-first chamber, 442-second chamber, 45-collecting bin, 46-reflux pipe, 461-guide block. DETAILED DESCRIPTION

[0028] 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.

[0029] Example: Figure 1-Figure 11 As shown, the present invention provides a technical solution for feed processing pretreatment equipment with multi-layer filtering function, the feed processing pretreatment equipment includes a frame 1, a crushing mechanism 2, a filtering mechanism 3 and a reflux mechanism 4, the crushing mechanism 2 is tightly connected to the frame 1, the crushing mechanism 2 is used to crush raw materials, the filtering mechanism 3 is tightly connected to the frame 1, the filtering mechanism 3 is used to screen the crushed raw materials, the reflux mechanism 4 is tightly connected to the frame 1, and the reflux mechanism 4 is used to transport substandard raw materials to the crushing mechanism 2.

[0030] The frame 1 is used to provide an installation basis for each mechanism. The raw materials to be crushed are crushed by the crushing mechanism 2 and then fall into the filtering mechanism 3. The filtering mechanism 3 can filter out the oversized particles and the undersized particles after crushing. The oversized particles are returned to the crushing mechanism 2 through the reflux mechanism 4 for secondary crushing, thereby improving the crushing quality.

[0031] A feed inlet 11, a coarse material outlet 12, a discharge port 13 and a fine material outlet 14 are arranged in sequence on the frame 1 along the material conveying direction. The crushing mechanism 2 includes a fixed roller 21, a movable roller 22, a first motor 23, a second motor 24, a sliding bearing seat 25 and an adjusting component 26. The fixed roller 21 is rotatably connected to the frame 1, the first motor 23 is tightly connected to the frame 1, and the output end of the first motor 23 is drivingly connected to the fixed roller 21. A guide groove 15 is provided on the frame 1, and the sliding bearing seat 25 is slidably connected to the guide groove 15. The movable roller 22 is rotatably connected to the sliding bearing seat 25, the second motor 24 is tightly connected to the sliding bearing seat 25, and the output end of the second motor 24 is drivingly connected to the movable roller 22. The adjusting component 26 is tightly connected to the frame 1, and the adjusting component 26 is used to control the position of the sliding bearing seat 25.

[0032] The raw materials enter the crushing mechanism 2 from the feed port 11 for crushing. After the crushed raw materials are filtered by the filtering mechanism 3, the oversized particles are discharged through the coarse material outlet 12, the qualified particles are discharged through the discharge port 13, and the overfine particles are discharged through the fine material outlet 14; the first motor 23 and the second motor 24 are used to drive the fixed roller 21 and the movable roller 22 to rotate, and the raw materials are crushed by the relative rotation between the fixed roller 21 and the movable roller 22. The raw materials are compressed, crushed and sheared by extrusion and friction, and finally the desired crushing effect is achieved; different raw materials require The crushed particle size is different, and the smaller the distance between the fixed roller 21 and the movable roller 22 is, the smaller the crushed particle size is, and the position of the fixed roller 21 is fixed. The sliding bearing seat 25 is driven by the adjusting component 26 to slide left and right along the guide groove 15 to adjust the crushed particle size. When the sliding bearing seat 25 moves toward the side of the fixed roller 21, the smaller the distance between the fixed roller 21 and the movable roller 22 is, the smaller the crushed particle size is, and vice versa. By adjusting the distance between the fixed roller 21 and the movable roller 22 by the adjusting component 26, the size of the crushed particle size can be automatically controlled.

[0033] The adjustment component 26 includes a hydraulic cylinder 261, a piston 262 and a liquid guide tube 263. The hydraulic cylinder 261 is tightly connected to the inner wall of the guide groove 15. The output end of the hydraulic cylinder 261 is transmission-connected to the sliding bearing seat 25. The piston 262 is tightly connected to the sliding bearing seat 25. The piston 262 is located at one end of the sliding bearing seat 25 away from the hydraulic cylinder 261. An active chamber 16 is provided on the frame 1. The piston 262 is slidingly connected to the active chamber 16. Hydraulic oil is filled in the active chamber 16. One end of the liquid guide tube 263 is connected to the active chamber 16, and the other end of the liquid guide tube 263 is connected to the filtering mechanism 3.

[0034] The hydraulic cylinder 261 is the main power source of the adjustment component 26. When it is necessary to reduce the crushed particle size, the hydraulic cylinder 261 is started, driving the sliding bearing seat 25 to move along the guide groove 15 toward the side of the fixed roller 21, that is, driving the moving roller 22 to approach the fixed roller 21, so that the distance between the fixed roller 21 and the moving roller 22 becomes smaller, thereby reducing the crushed particle size; at the same time, when the sliding bearing seat 25 moves, it will also drive the piston 262 to move along the active chamber 16 to the same side, thereby pressing the hydraulic oil in the active chamber 16 into the liquid guide tube 263, and using the pressure transmitted by the liquid guide tube 263 to drive the filter mechanism 3 to operate, thereby changing the size of the filter mesh in the crushing mechanism 2, and realizing automatic adjustment of the size of the filter mesh according to the size of the crushed particles.

[0035] The filtering mechanism 3 includes a coarse filter screen 31 and a variable filter screen assembly 32. The coarse filter screen 31 and the variable filter screen assembly 32 are arranged obliquely. The mesh holes on the coarse filter screen 31 are larger than the mesh holes of the variable filter screen assembly 32. The lower end of the coarse filter screen 31 faces the coarse material outlet 12, and the lower end of the variable filter screen assembly 32 faces the discharge port 13.

[0036] The raw materials after crushing may be incompletely crushed, resulting in a certain amount of oversized particles and some crushed stones that cannot be crushed mixed in the crushed particles; the inclined coarse filter 31 and the variable filter assembly 32 can guide the falling crushed particles, so that the particles slide from the corresponding outlets under the action of their own gravity. Because the mesh holes on the coarse filter 31 are larger than the mesh holes of the variable filter assembly 32, the oversized particles and crushed stones flow out from the coarse material outlet 12 under the obstruction of the coarse filter 31, and the qualified particles flow out from the discharge port 13 under the obstruction of the variable filter assembly 32, and the undersized particles slide through the mesh holes of the variable filter assembly 32 to the fine material outlet 14 and flow out, that is, multi-layer filtration of the crushed raw materials through the coarse filter 31 and the variable filter assembly 32 is realized, and the crushed particles are divided into three parts according to the particle size, so as to facilitate subsequent processing.

[0037] The variable filter assembly 32 includes a fixed filter 321, a movable filter 322 and a support spring 323. The frame 1 is also provided with a snap-in groove 17 and a sliding groove 18. The fixed filter 321 is snap-into the snap-in groove 17, the movable filter 322 is slidably connected to the sliding groove 18, the sliding groove 18 is connected to the liquid guide tube 263, one end of the support spring 323 is fastened to the inner wall of the sliding groove 18, and the other end of the support spring 323 is fastened to the movable filter 322. The mesh holes on the fixed filter 321 and the movable filter 322 are arranged alternately.

[0038] By staggering the mesh holes on the fixed filter 321 and the movable filter 322, the actual mesh size of the variable filter assembly 32 is the overlapped portion of the mesh holes on the fixed filter 321 and the movable filter 322. By adjusting the relative position of the movable filter 322 and the fixed filter 321, the size of the actual mesh hole can be adjusted; the fixed filter 321 is fixed to the frame 1 through the clamping groove 17, and the movable filter 322 can slide along the sliding groove 18; when it is necessary to reduce the crushed particle size, the movable roller 22 moves toward the fixed roller 21 under the drive of the hydraulic cylinder 261, that is, the distance between the movable roller 22 and the fixed roller 21 is reduced, and when the sliding bearing seat 25 moves under the drive of the hydraulic cylinder 261, it will also drive the piston 262 to move along the movable chamber 16 to the same side, thereby pressing the hydraulic oil in the movable chamber 16 into the liquid guide tube 263, the hydraulic oil can transfer the pressure to the sliding groove 18, thereby driving the movable filter 322 to move to one side, the support spring 323 is compressed, the overlapping part of the mesh holes of the fixed filter 321 and the movable filter 322 is reduced, and the actual mesh size is also reduced; when it is necessary to increase the crushed particle size, the distance between the movable roller 22 and the fixed roller 21 is increased, and the piston 262 moves away from the fixed roller 21 under the drive of the hydraulic cylinder 261. Under the transmission action of the hydraulic pressure, the movable filter 322 will slide upward along the sliding groove 18, the overlapping part of the mesh holes of the fixed filter 321 and the movable filter 322 is increased, and the actual mesh size is also increased; that is, the mesh size of the variable filter assembly 32 is automatically adjusted according to the size of the crushed particle size, without the need to replace the filter, thereby improving the crushing efficiency.

[0039] The reflux mechanism 4 includes a connecting bin 41, a feeding fan 42, a spiral tube 43, a distribution bin 44, a collecting bin 45 and a reflux pipe 46. The connecting bin 41 is connected to the coarse material outlet 12, the feeding fan 42 is firmly connected to the frame 1, the inlet of the feeding fan 42 is connected to the connecting bin 41, the outlet of the feeding fan 42 is connected to the spiral tube 43, the outlet of the spiral tube 43 is connected to the distribution bin 44, the distribution bin 44 is firmly connected to the frame 1, a first chamber 441 and a second chamber 442 are provided in the distribution bin 44, the first chamber 441 is connected to the outer circle of the outlet of the spiral tube 43, the second chamber 442 is connected to the inner circle of the outlet of the spiral tube 43, the collecting bin 45 is connected to the first chamber 441, the reflux pipe 46 is connected to the second chamber 442, and the outlet of the reflux pipe 46 is arranged inclined.

[0040] Oversized particles and crushed stones fall into the connecting bin 41 from the coarse material outlet 12. Under the action of the feeding fan 42, the objects in the connecting bin 41 will be transported to the spiral tube 43 and move along the spiral tube 43. Under the action of centrifugal force, the crushed stones with larger mass are subjected to greater centrifugal force and will be distributed on the outer circle of the spiral tube 43, while the feed particles with lighter mass will be distributed on the inner circle of the spiral tube 43. Therefore, the crushed stones will fall into the first chamber 441 and then enter the collecting bin 45, that is, the crushed stones in the raw materials are separated; oversized particles will fall into the second chamber 442 and then flow into the reflux chamber 45. In the pipe 46, the return pipe 46 can transport the large particles back to the crushing mechanism 2 for secondary crushing, and the outlet of the inclined return pipe 46 can guide the large particles to the surface of the fixed roller 21 and the movable roller 22, and flush the surface of the fixed roller 21 and the movable roller 22, so as to remove the objects adhering to the roller surface during the crushing process, thereby keeping the crushing surface clean; that is, the crushed stones in the crushed material are separated through the spiral pipe 43, and the surfaces of the fixed roller 21 and the movable roller 22 are self-cleaned through the outlet of the inclined return pipe 46, thereby improving the crushing quality.

[0041] The spiral diameter of the spiral tube 43 gradually decreases.

[0042] By gradually reducing the spiral diameter of the spiral tube 43, the rotation radius of the object in the tube is reduced, and the centrifugal force on the large-particle feed and gravel is increased, thereby improving the separation effect.

[0043] Crushing teeth are provided on the surfaces of the fixed roller 21 and the movable roller 22, and the fixed roller 21 and the movable roller 22 rotate in opposite directions.

[0044] The fixed roller 21 and the movable roller 22 crush objects by relative rotation therebetween, and the crushing teeth can improve the crushing efficiency.

[0045] A guide block 461 is provided on the return pipe 46 , and the cross section of the guide block 461 is triangular.

[0046] The reflux pipe 46 is arranged between the fixed roller 21 and the movable roller 22. The triangular guide block 461 can guide the raw materials entering from the feed port 11, so that the raw materials are evenly distributed on the surfaces of the fixed roller 21 and the movable roller 22, thereby improving the crushing efficiency; in addition, the guide block 461 cooperates with the inclined outlet on the reflux pipe 46 to collide the particles returned after crushing with the raw materials, so that the raw materials are subjected to additional impact force, thereby achieving a pre-crushing effect.

[0047] The working principle of the present invention is as follows: the raw material enters the crushing mechanism 2 from the feed port 11 for crushing. After the crushed raw material is filtered by the filtering mechanism 3, the oversized particles are discharged through the coarse material outlet 12, the qualified particles are discharged through the discharge port 13, and the oversized particles are discharged through the fine material outlet 14. When it is necessary to adjust the crushed particle size, the hydraulic cylinder 261 is used to drive the sliding bearing seat 25 to move along the guide groove 15, so as to adjust the relative position between the moving roller 22 and the fixed roller 21. At the same time, when the sliding bearing seat 25 moves, The piston 262 will be driven to move along the movable chamber 16 to the same side, thereby pressing the hydraulic oil in the movable chamber 16 into the liquid guide tube 263. The hydraulic oil can transmit the pressure to the sliding groove 18, thereby driving the movable filter 322 to move to one side, the support spring 323 is compressed, and the overlapping part of the mesh holes of the fixed filter 321 and the movable filter 322 is reduced, and the actual mesh size is also reduced, so that the mesh size of the variable filter assembly 32 is automatically adjusted according to the size of the crushed particle size; the oversized particles and gravel fall into the connecting bin from the coarse material outlet 12 41, under the action of the feeding fan 42, the objects in the connecting bin 41 will be transported to the spiral tube 43 and move along the spiral tube 43. Under the action of centrifugal force, the crushed stones with larger mass will be subjected to greater centrifugal force and will be distributed on the outer circle of the spiral tube 43, while the feed particles with lighter mass will be distributed on the inner circle of the spiral tube 43. Therefore, the crushed stones will fall into the first chamber 441 and then enter the collecting bin 45, that is, the crushed stones in the raw materials are separated; the oversized particles will fall into the second chamber 442 and then flow into the return pipe 46. The return pipe 46 can transport the large particles back to the crushing mechanism 2 for secondary crushing, and the outlet of the inclined return pipe 46 can guide the large particles to the surface of the fixed roller 21 and the movable roller 22, and flush the surface of the fixed roller 21 and the movable roller 22, so as to remove the objects adhering to the roller surface during the crushing process, thereby keeping the crushing surface clean; that is, the crushed stones in the crushed material are separated through the spiral tube 43, and the surfaces of the fixed roller 21 and the movable roller 22 are self-cleaned through the outlet of the inclined return pipe 46.

[0048] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A feed processing pretreatment equipment with multi-layer filtering function, characterized in that: The feed processing and pretreatment equipment comprises a frame (1), a crushing mechanism (2), a filtering mechanism (3) and a reflux mechanism (4); the crushing mechanism (2) is tightly connected to the frame (1); the crushing mechanism (2) is used to crush raw materials; the filtering mechanism (3) is tightly connected to the frame (1); the filtering mechanism (3) is used to screen the crushed raw materials; the reflux mechanism (4) is tightly connected to the frame (1); the reflux mechanism (4) is used to transport substandard raw materials to the crushing mechanism (2).

2. The feed processing and pretreatment equipment with multi-layer filtering function according to claim 1 is characterized in that: The frame (1) is provided with a feed inlet (11), a coarse material outlet (12), a discharge outlet (13) and a fine material outlet (14) in sequence along the material conveying direction. The crushing mechanism (2) comprises a fixed roller (21), a movable roller (22), a first motor (23), a second motor (24), a sliding bearing seat (25) and an adjustment component (26). The fixed roller (21) is rotatably connected to the frame (1). The first motor (23) is tightly connected to the frame (1). The output end of the first motor (23) is connected to the The fixed roller (21) is connected in driving connection, the frame (1) is provided with a guide groove (15), the sliding bearing seat (25) is slidably connected to the guide groove (15), the movable roller (22) is rotationally connected to the sliding bearing seat (25), the second motor (24) is tightly connected to the sliding bearing seat (25), the output end of the second motor (24) is connected in driving connection to the movable roller (22), the adjustment component (26) is tightly connected to the frame (1), and the adjustment component (26) is used to control the position of the sliding bearing seat (25).

3. The feed processing and pretreatment equipment with multi-layer filtering function according to claim 2 is characterized in that: The regulating assembly (26) comprises a hydraulic cylinder (261), a piston (262) and a liquid guide tube (263); the hydraulic cylinder (261) is tightly connected to the inner wall of the guide groove (15); the output end of the hydraulic cylinder (261) is transmission-connected to the sliding bearing seat (25); the piston (262) is tightly connected to the sliding bearing seat (25); the piston (262) is located at one end of the sliding bearing seat (25) away from the hydraulic cylinder (261); an active chamber (16) is provided on the frame (1); the piston (262) is slidably connected to the active chamber (16); hydraulic oil is filled in the active chamber (16); one end of the liquid guide tube (263) is in communication with the active chamber (16); and the other end of the liquid guide tube (263) is in communication with the filtering mechanism (3).

4. The feed processing and pretreatment equipment with multi-layer filtering function according to claim 3 is characterized in that: The filtering mechanism (3) comprises a coarse filter (31) and a variable filter assembly (32); the coarse filter (31) and the variable filter assembly (32) are arranged obliquely; the mesh openings on the coarse filter (31) are larger than the mesh openings on the variable filter assembly (32); the lower end of the coarse filter (31) faces the coarse material outlet (12), and the lower end of the variable filter assembly (32) faces the material outlet (13).

5. The feed processing and pretreatment equipment with multi-layer filtering function according to claim 4 is characterized in that: The variable filter assembly (32) comprises a fixed filter (321), a movable filter (322) and a support spring (323); the frame (1) is further provided with a clamping groove (17) and a sliding groove (18); the fixed filter (321) is clamped with the clamping groove (17); the movable filter (322) is slidably connected with the sliding groove (18); the sliding groove (18) is communicated with the liquid guide tube (263); one end of the support spring (323) is tightly connected with the inner wall of the sliding groove (18); the other end of the support spring (323) is tightly connected with the movable filter (322); the mesh holes on the fixed filter (321) and the movable filter (322) are arranged in a staggered manner.

6. The feed processing and pretreatment equipment with multi-layer filtering function according to claim 2 is characterized in that: The reflux mechanism (4) comprises a connecting bin (41), a feeding fan (42), a spiral tube (43), a distribution bin (44), a collecting bin (45) and a reflux tube (46); the connecting bin (41) is in communication with the coarse material outlet (12); the feeding fan (42) is firmly connected to the frame (1); the inlet of the feeding fan (42) is in communication with the connecting bin (41); the outlet of the feeding fan (42) is in communication with the spiral tube (43); the outlet of the spiral tube (43) is in communication with the distribution bin (44); The distribution bin (44) is connected to the frame (1) in a fixed manner. A first chamber (441) and a second chamber (442) are provided in the distribution bin (44). The first chamber (441) is connected to the outer ring of the outlet of the spiral tube (43). The second chamber (442) is connected to the inner ring of the outlet of the spiral tube (43). The collection bin (45) is connected to the first chamber (441). The return pipe (46) is connected to the second chamber (442). The outlet of the return pipe (46) is arranged obliquely.

7. The feed processing and pretreatment equipment with multi-layer filtering function according to claim 6, characterized in that: The spiral diameter of the spiral tube (43) gradually decreases.

8. The feed processing and pretreatment equipment with multi-layer filtering function according to claim 2, characterized in that: Crushing teeth are provided on the surfaces of the fixed roller (21) and the movable roller (22); the fixed roller (21) and the movable roller (22) rotate in opposite directions.

9. The feed processing and pretreatment equipment with multi-layer filtering function according to claim 6, characterized in that: The return pipe (46) is provided with a guide block (461), and the cross section of the guide block (461) is triangular.

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