A raw material screening device for chicken feed processing

Abstract

The present invention discloses a raw material screening device for chicken feed processing, comprising a base, a support frame installed on one side of the upper surface of the base, a screw feeder installed on the upper end of the support frame, a conical feed hopper installed on the upper end of the screw feeder, a multi-stage screening mechanism provided on the base, and a material guide mechanism provided above the base. The beneficial effect of the present invention is that raw materials can be screened through the first diamond-shaped holes on the circular screening box and the second diamond-shaped holes on the arc plate, smaller raw materials can fall into the circular guide box, and through the rotation of the scraper, the raw materials can be made to fall through the discharge port onto the circular screening box of the next layer, thereby enabling multi-stage screening of the raw materials, and raw materials that have not been screened above the circular screening box can fall onto the inclined discharge channel, thereby preventing accumulation of raw materials in the screening area and improving work efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of feed processing equipment, and more particularly to a raw material screening device for chicken feed processing. Background Art

[0002] The raw materials of chicken feed include corn, millet, wheat, beans, etc. When processing chicken feed, the raw materials need to be screened first and then mixed.

[0003] In the prior art, when screening the raw materials of chicken feed, the raw materials are generally placed directly on the screening net, and then the feed can be screened by the vibration of the screening net. When performing multi-stage screening, multiple screening nets are placed vertically, and raw materials of different sizes can be screened out. However, there are some problems in its use. After screening, the larger raw materials on the screening net will remain above the screening net, and the staff needs to clean it after a period of time. Before cleaning, since raw materials are continuously added to the screening net, the amount of raw materials on the screening net will increase, and most of them are raw materials that cannot pass through the screening net, which will affect work efficiency. In addition, some raw materials will be stuck in the screening holes, which is inconvenient to remove, affecting work efficiency.

[0004] It should be noted that the above content falls within the technical knowledge of the inventor and does not necessarily constitute prior art. Summary of the Invention

[0005] The purpose of the present invention is to solve the above problems and to design a raw material screening device for chicken feed processing.

[0006] The technical solution of the present invention to achieve the above-mentioned purpose is a raw material screening device for chicken feed processing, comprising a base, a support frame installed on one side of the upper surface of the base, a screw feeder installed on the upper end of the support frame, a conical feed hopper installed on the upper end of the screw feeder, a multi-stage screening mechanism provided on the base; and a material guide mechanism provided above the base;

[0007] The multi-stage screening mechanism includes a plurality of circular support platforms located above the base, the plurality of circular support platforms are installed on the base through a plurality of supporting legs, a circular screening box is provided on the inner side of the circular support platform, a screw feeder can add raw materials to one side of the circular screening box, a plurality of vibrators are installed in the circular screening box, the plurality of circular screening boxes are connected by connecting rods, a rotating column is installed at the center position of the circular screening box, a plurality of first diamond-shaped holes are opened on the circular screening box, a limiting frame is installed on the circular support platform, the limiting frame can limit the circular screening box, eight partition platforms are provided on the inner side of the circular screening box, one end of the partition platform is connected to the inner surface of the circular screening box, the other end of the partition platform is connected to the outer surface of the rotating column, the lower surface of the partition platform is fixedly installed on the inner lower surface of the circular screening box, the partition platform can divide the circular screening box into eight screening areas, the circular screening box Eight arc-shaped plates are slidably installed at the bottom, and the eight arc-shaped plates correspond to the eight screening areas one by one. A plurality of second diamond-shaped holes are opened on the arc-shaped plates, and screening holes of different sizes can be adjusted by cooperating with the second diamond-shaped holes and the first diamond-shaped holes. The second diamond-shaped holes correspond to the first diamond holes one by one. A pushing frame is installed on the circular screening box, and the pushing frame can drive the arc-shaped plates to move. An inclined discharging channel is provided on one side of the lower part of the circular screening box, and the inclined discharging channel is installed on the base through a supporting frame. When the arc-shaped plate rotates to above the inclined discharging channel, the pushing frame can pull the arc-shaped plate outward. When the arc-shaped plate rotates to one side of the inclined discharging channel, the pushing frame can push the arc-shaped plate back to its original position. A driving frame is installed on the supporting frame, and the driving frame can drive the circular screening box to rotate. A holding box is installed on the base, and the holding box can collect the raw materials discharged from the inclined discharging channel.

[0008] The material guiding mechanism includes an annular material guiding box located between the circular screening boxes, the annular material guiding box is installed on the supporting legs through the supporting rod, a discharge port is opened on one side of the lower end of the annular material guiding box, a plurality of scrapers are arranged in the annular material guiding box, a cleaning brush is installed at the lower end of the scraper, the upper end of the scraper is connected to the connecting rod through the connecting shaft, and a collecting box is installed on the base.

[0009] Furthermore, the pushing frame includes a spring pin installed on one side surface of the arc plate, an L-shaped fixed plate is installed at one end of the spring pin, the upper end of the L-shaped fixed plate is fixedly connected to the outer surface of the circular screening box, an L-shaped movable plate is installed at the lower end of the arc plate, a pulley is installed at the lower end of the L-shaped movable plate, and an arc-shaped platform is provided on one side above the inclined discharge channel. When the pulley rotates to one side of the arc-shaped platform, the arc plate can be moved outward, and the arc-shaped platform is installed on a supporting leg through a fixed rod.

[0010] Furthermore, a square opening is provided on the inclined discharge channel to avoid the supporting legs, and the supporting legs can pass through the square opening. A triangular protective plate is installed on the inclined discharge channel.

[0011] Furthermore, the containing box includes a square box body located on one side of the inclined discharge channel, the upper square box body is installed on the lower square box body through a support column, and the lowermost square box body is fixedly installed on the base.

[0012] Furthermore, a plurality of guide grooves are provided on both sides of the arc-shaped plate, and a plurality of L-shaped guide plates are installed on the lower surface of the circular screening box, with one end of the L-shaped guide plate extending into the guide groove.

[0013] Furthermore, the driving frame includes a reducer installed on the upper end of the support frame, a first gear is installed at one end of the screw feeder, a second gear is installed at the power input end of the reducer, the first gear and the second gear are meshed, a first bevel gear is installed at the power output end of the reducer, and a second bevel gear is installed at the upper end of the top circular screening box, and the first bevel gear and the second bevel gear are meshed.

[0014] Furthermore, the limit frame includes a plurality of first universal balls installed on the inner surface of the circular support platform, two circular limit plates are installed on the outer surface of the circular screening box, the two circular limit plates are respectively located above and below the circular support platform, and a plurality of second universal balls are installed on the inner surface of the circular limit plate, and the second universal balls are in contact with the circular support platform.

[0015] Furthermore, an adjustment mechanism is provided above the base, the connecting rod is a regular octagonal column, and the adjustment mechanism includes a regular octagonal sleeve mounted on the outside of the connecting rod, a plurality of step grooves are provided on the outside of the regular octagonal sleeve, a plurality of limiting holes are provided on the eight side surfaces of the connecting rod, a plurality of pins are installed at the lower end of the regular octagonal sleeve, one end of the pins can be inserted into the limiting hole, a regular octagonal groove is provided at the lower end of the rotating column, and the upper end of the regular octagonal sleeve can extend into the regular octagonal annular groove.

[0016] The beneficial effects of the present invention are as follows: raw materials are added into the circular screening box, and the raw materials can be screened through the first diamond-shaped holes on the circular screening box and the second diamond-shaped holes on the arc plate. Smaller raw materials can fall into the annular guide box, and the rotation of the scraper can make the raw materials fall through the discharge port to the circular screening box on the next layer, thereby enabling multi-stage screening of the raw materials. Raw materials that have not been screened above the circular screening box can be moved to the upper part of the inclined discharge channel by moving the arc plate, so that the second diamond-shaped holes can be moved below the first diamond holes, thereby enlarging the screening holes, facilitating the falling of raw materials that have not been screened on the circular screening box, and also allowing raw materials stuck on the screening holes to fall, thereby preventing accumulation of raw materials on the screening area and improving work efficiency.

[0017] The position of the arc plate can be adjusted by the adjustment mechanism, and then the relative position of the second diamond hole and the first diamond hole can be adjusted, the size of the screening hole can be changed, and when screening raw materials of different sizes, there is no need to replace the screening net, which is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a raw material screening device for chicken feed processing according to the present invention;

[0019] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle;

[0020] Figure 3 yes Figure 1 A partial enlarged view of point B in the middle;

[0021] Figure 4 This is a schematic structural diagram of a raw material screening device for chicken feed processing according to the present invention;

[0022] Figure 5 yes Figure 4 A partial enlarged view of point C in the middle;

[0023] Figure 6 yes Figure 4 A partial enlarged view of point D in the middle;

[0024] Figure 7 Schematic diagram of the positional relationship between the circular screening box and the partition table of the present invention;

[0025] Figure 8 yes Figure 7 A partial enlarged view of point E in the middle;

[0026] Figure 9 Schematic diagram of the positional relationship between the inclined discharge channel and the support legs of the present invention;

[0027] Figure 10 This is a schematic diagram of the positional relationship between the annular material guide box and the discharge port of the present invention;

[0028] Figure 11 Schematic diagram of the positional relationship between the guide groove and the L-shaped guide plate of the present invention;

[0029] Figure 12 Schematic diagram of the positional relationship between the connecting rod and the regular octagonal sleeve of the present invention;

[0030] Figure 13 Schematic diagram of the positional relationship between the pulley and the curved platform of the present invention;

[0031] In the figure, 1, base; 2, support frame; 3, screw feeder; 4, conical feed hopper; 5, circular support platform; 6, support leg; 7, circular screening box; 8, vibrator; 9, connecting rod; 10, rotating column; 11, first diamond hole; 12, limit frame; 13, partition table; 14, arc plate; 15, second diamond hole; 16, pushing frame; 17, inclined discharge channel; 18, supporting frame; 19, driving frame; 20, holding box; 21, circular guide box; 22, support rod; 23, discharge port; 24, scraper; 25, cleaning brush; 26, connecting shaft; 27, collecting box; 28 , spring thimble; 29, L-shaped fixed plate; 30, L-shaped movable plate; 31, pulley; 32, arc-shaped table; 33, fixed rod; 34, square opening; 35, triangular protective plate; 36, square box; 37, support column; 38, guide groove; 39, L-shaped guide plate; 40, reducer; 41, first gear; 42, second gear; 43, first bevel gear; 44, second bevel gear; 45, first universal ball; 46, circular limit plate; 47, second universal ball; 48, regular octagonal sleeve; 49, step groove; 50, limit hole; 51, latch; 52, regular octagonal groove. DETAILED DESCRIPTION

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings 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 making creative efforts shall fall within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "length," "width," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, in the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

[0034] The present invention provides Figure 1-13The raw material screening device for chicken feed processing shown in the figure includes a base 1, a support frame 2 is installed on one side of the upper surface of the base 1, a screw feeder 3 is installed on the upper end of the support frame 2, and a conical feed hopper 4 is installed on the upper end of the screw feeder 3. A multi-stage screening mechanism is provided on the base 1; a material guiding mechanism is provided above the base 1; the multi-stage screening mechanism includes multiple circular support platforms 5 located above the base 1, the multiple circular support platforms 5 are installed on the base 1 through multiple supporting legs 6, a circular screening box 7 is provided on the inner side of the circular support platform 5, the screw feeder 3 can add raw materials to one side of the circular screening box 7, a plurality of vibrators 8 are installed in the circular screening box 7, and the multiple circular screening boxes 7 are connected by The connecting rod 9 is connected, a rotating column 10 is installed at the center position of the circular screening box 7, a plurality of first diamond holes 11 are opened on the circular screening box 7, a limiting frame 12 is installed on the circular support platform 5, and the limiting frame 12 can limit the circular screening box 7. Eight partition platforms 13 are provided on the inside of the circular screening box 7. One end of the partition platform 13 is connected to the inner surface of the circular screening box 7, and the other end of the partition platform 13 is connected to the outer surface of the rotating column 10. The lower surface of the partition platform 13 is fixedly installed on the lower surface of the circular screening box 7. The partition platform 13 can divide the circular screening box 7 into eight screening areas. Eight arc plates 14 are slidably installed under the circular screening box 7. The eight arc plates 14 are connected to the eight The screening areas correspond one to one, and a plurality of second diamond holes 15 are opened on the arc plate 14. The screening holes of different sizes can be adjusted by cooperating with the second diamond holes 15 and the first diamond holes 11. The second diamond holes 15 and the first diamond holes 11 correspond one to one. A pushing frame 16 is installed on the circular screening box 7. The pushing frame 16 can drive the arc plate 14 to move. An inclined discharge channel 17 is provided on one side below the circular screening box 7. The inclined discharge channel 17 is installed on the base 1 through a supporting frame 18. When the arc plate 14 rotates to above the inclined discharge channel 17, the pushing frame 16 can pull the arc plate 14 outward. When the arc plate 14 rotates to one side of the inclined discharge channel 17, the pushing frame 16 can pull the arc plate 14 outward. The movable frame 16 can push the curved plate 14 back to its original position. A driving frame 19 is installed on the support frame 2, and the driving frame 19 can drive the circular screening box 7 to rotate. A holding box 20 is installed on the base 1, and the holding box 20 can collect the raw materials discharged from the inclined discharge channel 17; the material guiding mechanism includes an annular material guiding box 21 located between the circular screening boxes 7, and the annular material guiding box 21 is installed on the support leg 6 through a support rod 22. A discharge port 23 is opened on one side of the lower end of the annular material guiding box 21, and a plurality of scrapers 24 are provided in the annular material guiding box 21. A cleaning brush 25 is installed at the lower end of the scraper 24, and the upper end of the scraper 24 is connected to the connecting rod 9 through a connecting shaft 26. A collecting box 27 is installed on the base 1;

[0035] The process of screening the raw materials of chicken feed by this device is as follows: before screening the raw materials of chicken feed, select a circular screening box 7 and an arc plate 14 of suitable models for installation, and adjust the screening holes of different sizes by cooperating with the first diamond hole 11 and the second diamond hole 15, and the smaller the screening holes are as they go down, the raw materials of chicken feed are added to the screw feeder 3 through the conical feed hopper 4, and the raw materials of chicken feed can be added to the uppermost circular screening box 7 through the operation of the screw feeder 3, and the uppermost circular screening box 7 can be driven to rotate by the driving frame 19, and the limiting frame 12 can limit the circular screening box 7, and multiple circular screening boxes 7 can be moved by the driving frame 19. The connecting rod 9 is connected, so that all the circular screening boxes 7 can be rotated, and the vibrator 8 is started to vibrate the circular screening box 7, which can facilitate the screening of the raw materials. The circular screening box 7 can be divided into eight screening areas by the partition table 13. Among the eight screening areas, five positions are used to screen the raw materials, one position is used to discharge larger raw materials, and the remaining two are transition areas. When the circular screening box 7 rotates, different screening areas can pass under the discharge end of the screw feeder 3 in turn, and different screening areas can be used to receive the raw materials. After receiving the raw materials, the raw materials can be screened, and the screening The area rotates, and smaller raw materials can pass through the screening holes and fall into the annular guide box 21 below the circular screening box 7, and larger raw materials remain inside the circular screening box 7. When the screening area rotates to above the inclined discharge channel 17, the arc plate 14 can be pushed to one side by the pushing frame 16, so that the second diamond hole 15 can be moved to the bottom of the first diamond hole 11, and the screening hole can be enlarged, so that the larger raw materials above the screening area and the raw materials stuck at the screening hole can fall into the inclined discharge channel 17, and then under the action of the inclined surface, the larger raw materials can fall into the holding box 20 for collection. After the raw materials move to one side of the channel 17, the pushing frame 16 pushes the arc plate 14 back to its original position, which is convenient for continuing to hold the raw materials and screen them. When the connecting rod 9 rotates, the scraper 24 can be driven to rotate through the connecting shaft 26. The cleaning brush 25 at the lower end of the scraper 24 can push the raw materials that fall into the annular guide box 21. When the raw materials move to the discharge port 23, the raw materials can fall into the circular screening box 7 of the next layer for screening. Repeat the above process, the larger raw materials can be discharged into the holding box 20 again, and the smaller raw materials can be screened into the circular screening box 7 of the next layer. Finally, the smaller raw materials can pass through the circular screening box 7 and fall into the collecting box 27 for collection.

[0036] Refer to the instruction manual Figure 1 , Instruction Manual Figure 2 , Instruction Manual Figure 4 and instructions attached Figure 5The pushing frame 16 includes a spring thimble 28 mounted on one side surface of the arc-shaped plate 14, an L-shaped fixing plate 29 is mounted on one end of the spring thimble 28, the upper end of the L-shaped fixing plate 29 is fixedly connected to the outer surface of the circular screening box 7, an L-shaped movable plate 30 is mounted on the lower end of the arc-shaped movable plate 30, a pulley 31 is mounted on the lower end of the L-shaped movable plate 30, and an arc-shaped platform 32 is provided on one side above the inclined discharge channel 17. When the pulley 31 rotates to the side of the arc-shaped platform 32, the arc-shaped plate 14 can be moved outward. The arc-shaped platform 32 is mounted on a supporting leg 6 through a fixing rod 33;

[0037] The process of pushing the frame 16 to move the curved plate is as follows: Under normal conditions, under the elastic force of the spring ejector 28, one end of the curved plate 14 can be pushed against the connecting rod 9. At this time, the second diamond hole 15 is located on the side below the first diamond hole 11, and the screening hole formed is the smallest. When the circular screening box 7 rotates, the curved plate, the L-shaped moving plate 30, and the pulley 31 can be driven to rotate. When the screening area rotates to the top of the inclined discharge channel 17, the pulley 31 can be moved to the side of the curved table 32, and under the action of the inclined surface of the curved table 32, the curved plate 32 is moved to the side of the curved table 32. , the pulley 31, the L-shaped movable plate 30, and the curved plate 14 can be pushed outward, and the spring ejector 28 can be compressed, so that the second diamond hole 15 can be moved to the bottom of the first diamond hole 11, so that the screening hole can be enlarged, which is convenient for discharging larger raw materials. When the pulley 31 moves to the side of the curved platform 32, the elastic force of the spring ejector 28 can push the curved plate 14 back to its original position, and the second diamond hole 15 can be moved to the side below the first diamond hole 11, forming the original screening hole and screening the raw materials.

[0038] Refer to the instruction manual Figure 4 , Instruction Manual Figure 5 and instructions attached Figure 9 A square opening 34 is provided on the inclined discharge channel 17 to avoid the supporting legs 6. The supporting legs 6 can pass through the square opening 34. A triangular protective plate 35 is installed on the inclined discharge channel 17. The square opening 34 can avoid the supporting legs 6, which can facilitate the installation of this device. The triangular protective plate 35 can protect the square opening 34, thereby preventing raw materials from falling from the square opening 34.

[0039] Refer to the instruction manual Figure 1 and instructions attached Figure 4 The holding box 20 includes a square box body 36 located on one side of the inclined discharge channel 17. The upper square box body 36 is installed on the lower square box body 36 through a support column 37. The lowest square box body 36 is fixedly installed on the base 1. Through multiple square boxes 36, the raw materials discharged from different inclined discharge channels 17 can be collected separately to prevent them from mixing again.

[0040] Refer to the instruction manual Figure 11A plurality of guide grooves 38 are provided on both sides of the arc-shaped plate 14, and a plurality of L-shaped guide plates 39 are installed on the lower surface of the circular screening box 7. One end of the L-shaped guide plate 39 extends into the guide groove 38. The guide groove 38 and the L-shaped guide plate 39 can guide the arc-shaped plate 14 and ensure the moving direction of the arc-shaped plate 14.

[0041] Refer to the instruction manual Figure 1 The driving frame 19 includes a reducer 40 mounted on the upper end of the support frame 2, a first gear 41 is mounted on one end of the screw feeder 3, a second gear 42 is mounted on the power input end of the reducer 40, the first gear 41 and the second gear 42 are meshed, a first bevel gear 43 is mounted on the power output end of the reducer 40, and a second bevel gear 44 is mounted on the upper end of the uppermost circular screening box 7, the first bevel gear 43 and the second bevel gear 44 are meshed;

[0042] The process of the driving frame 19 driving the circular screening box 7 to rotate is as follows: when the screw feeder 3 is running, it can drive the first gear 41 to rotate, and the first gear 41 is engaged with the second gear 42, which can drive the second gear 42 and the power input end of the reducer 40 to rotate. After deceleration by the reducer 40, it can drive the first bevel gear 43 to rotate, and the first bevel gear 43 is engaged with the second bevel gear 44, which can drive the second bevel gear 44 and the circular screening box 7 to rotate. After deceleration by the reducer 40, the circular screening box 7 can rotate a smaller angle only after the screw feeder 3 discharges more raw materials, so that more raw materials can be screened. Since the circular screening box 7 rotates slowly, the raw materials can be screened more thoroughly.

[0043] Refer to the instruction manual Figure 1 , Instruction Manual Figure 2 , Instruction Manual Figure 4 and instructions attached Figure 5 The limiting frame 12 includes a plurality of first universal balls 45 mounted on the inner surface of the circular support platform 5, and two circular limiting plates 46 are mounted on the outer surface of the circular screening box 7. The two circular limiting plates 46 are respectively located above and below the circular support platform 5. A plurality of second universal balls 47 are mounted on the inner surface of the circular limiting plate 46. The second universal balls 47 are in contact with the circular support platform 5.

[0044] The process of limiting the circular screening box 7 by the limiting frame 12 is as follows: the circular limiting plates 46 at the upper and lower ends of the circular screening box 7 can limit the height of the circular screening box 7, the second universal ball 47 can reduce the friction force when the circular limiting plate 46 rotates, and the first universal ball 45 can limit the outer side of the circular screening box 7 and generate friction when the circular screening box 7 rotates.

[0045] Refer to the instruction manual Figure 1 , Instruction Manual Figure 3 , Instruction Manual Figure 4 , Instruction Manual Figure 6 and instructions attached Figure 12 , an adjustment mechanism is also provided above the base 1. The connecting rod 9 is a regular octagonal column. The adjustment mechanism includes a regular octagonal sleeve 48 sleeved on the outside of the connecting rod 9. A plurality of step grooves 49 are opened on the outside of the regular octagonal sleeve 48. A plurality of limiting holes 50 are opened on the eight side surfaces of the connecting rod 9. A plurality of latches 51 are installed at the lower end of the regular octagonal sleeve 48. One end of the latch 51 can be inserted into the limiting hole 50. A regular octagonal groove 52 is opened at the lower end of the rotating column 10. The upper end of the regular octagonal sleeve 48 can extend into the regular octagonal annular groove 52.

[0046] The process of adjusting the position of the arc plate 14 by the adjustment mechanism is as follows: when screening different raw materials, there is no need to replace the circular screening box 7 and the arc plate 14. Just pull one end of the pin 51 out of the limiting hole 50, then pull the arc plate 14 outward, then move the regular octagonal sleeve 48 upward or downward, then insert one end of the pin 52 into the limiting hole 50, loosen the arc plate 14, and then under the elastic force of the spring ejector 28, the arc plate 14 can be pushed onto the regular octagonal sleeve 48. According to the different protruding lengths of the step groove 49 on the regular octagonal sleeve 48, the size of the screening hole can be adjusted, which is more convenient to use.

[0047] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A raw material screening device for chicken feed processing, comprising a base (1), a support frame (2) mounted on one side of the upper surface of the base (1), a screw feeder (3) mounted on the upper end of the support frame (2), and a conical feed hopper (4) mounted on the upper end of the screw feeder (3), characterized in that: A multi-stage screening mechanism is provided on the base (1); a material guiding mechanism is provided above the base (1); The multi-stage screening mechanism comprises a plurality of circular support platforms (5) located above the base (1), the plurality of circular support platforms (5) being mounted on the base (1) via a plurality of support legs (6), a circular screening box (7) being provided on the inner side of the circular support platform (5), a screw feeder (3) being capable of adding raw materials to one side of the circular screening box (7), a plurality of vibrators (8) being installed in the circular screening box (7), the plurality of circular screening boxes (7) being connected via a connecting rod (9), a rotating column (10) being mounted at the center of the circular screening box (7), and a plurality of first rhombus-shaped holes being provided on the circular screening box (7). Hole (11), a limiting frame (12) is installed on the circular support platform (5), and the limiting frame (12) can limit the circular screening box (7). Eight partition platforms (13) are provided inside the circular screening box (7), one end of the partition platform (13) is connected to the inner surface of the circular screening box (7), and the other end of the partition platform (13) is connected to the outer surface of the rotating column (10). The lower surface of the partition platform (13) is fixedly installed on the inner lower surface of the circular screening box (7). The partition platform (13) can divide the circular screening box (7) into eight screening areas. There are eight slidable mountings below the circular screening box (7). The eight arc-shaped plates (14) correspond to the eight screening areas one by one. The arc-shaped plates (14) are provided with a plurality of second diamond-shaped holes (15). Screening holes of different sizes can be adjusted by cooperating with the second diamond-shaped holes (15) and the first diamond-shaped holes (11). The second diamond-shaped holes (15) and the first diamond-shaped holes (11) correspond to each other one by one. A push frame (16) is installed on the circular screening box (7). The push frame (16) can drive the arc-shaped plates (14) to move. An inclined discharge channel (17) is provided on one side below the circular screening box (7). The inclined discharge channel (17) is connected to the support frame. The frame (18) is installed on the base (1). When the arc plate (14) rotates to the top of the inclined discharge channel (17), the pushing frame (16) can pull the arc plate (14) outward. When the arc plate (14) rotates to the side of the inclined discharge channel (17), the pushing frame (16) can push the arc plate (14) back to its original position. A driving frame (19) is installed on the support frame (2). The driving frame (19) can drive the circular screening box (7) to rotate. A holding box (20) is installed on the base (1). The holding box (20) can collect the raw materials discharged from the inclined discharge channel (17); The material guide mechanism includes a circular material guide box (21) located between the circular screening boxes (7), the circular material guide box (21) is installed on the support legs (6) through the support rods (22), a discharge port (23) is opened on one side of the lower end of the circular material guide box (21), a plurality of scrapers (24) are provided in the circular material guide box (21), a cleaning brush (25) is installed at the lower end of the scraper (24), the upper end of the scraper (24) is connected to the connecting rod (9) through the connecting shaft (26), and a collecting box (27) is installed on the base (1).

2. A raw material screening device for chicken feed processing according to claim 1, characterized in that: The pushing frame (16) includes a spring ejector pin (28) mounted on one side surface of the arc plate (14), an L-shaped fixed plate (29) is mounted on one end of the spring ejector pin (28), the upper end of the L-shaped fixed plate (29) is fixedly connected to the outer surface of the circular screening box (7), an L-shaped movable plate (30) is mounted on the lower end of the arc plate (14), a pulley (31) is mounted on the lower end of the L-shaped movable plate (30), and an arc platform (32) is provided on one side above the inclined discharge channel (17). When the pulley (31) rotates to one side of the arc platform (32), the arc plate (14) can be moved outward. The arc platform (32) is mounted on a supporting leg (6) through a fixing rod (33).

3. A raw material screening device for chicken feed processing according to claim 2, characterized in that: The inclined discharge channel (17) is provided with a square opening (34) for avoiding the support leg (6), and the support leg (6) can pass through the square opening (34). A triangular protective plate (35) is installed on the inclined discharge channel (17).

4. A raw material screening device for chicken feed processing according to claim 3, characterized in that: The containing box (20) comprises a square box body (36) located on one side of the inclined discharge channel (17), the upper square box body (36) is mounted on the lower square box body (36) via a support column (37), and the lowermost square box body (36) is fixedly mounted on the base (1).

5. The raw material screening device for chicken feed processing according to claim 2, characterized in that: A plurality of guide grooves (38) are formed on both sides of the arc-shaped plate (14), and a plurality of L-shaped guide plates (39) are installed on the lower surface of the circular screening box (7), with one end of the L-shaped guide plate (39) extending into the guide groove (38).

6. A raw material screening device for chicken feed processing according to claim 1, characterized in that: The driving frame (19) includes a reducer (40) mounted on the upper end of the support frame (2), a first gear (41) mounted on one end of the screw feeder (3), a second gear (42) mounted on the power input end of the reducer (40), the first gear (41) and the second gear (42) being meshed, a first bevel gear (43) mounted on the power output end of the reducer (40), and a second bevel gear (44) mounted on the upper end of the uppermost circular screening box (7), the first bevel gear (43) and the second bevel gear (44) being meshed.

7. The raw material screening device for chicken feed processing according to claim 1, characterized in that: The limiting frame (12) includes a plurality of first universal balls (45) mounted on the inner surface of the circular support platform (5), two circular limiting plates (46) are mounted on the outer surface of the circular screening box (7), the two circular limiting plates (46) are respectively located above and below the circular support platform (5), and a plurality of second universal balls (47) are mounted on the inner surface of the circular limiting plates (46), and the second universal balls (47) are in contact with the circular support platform (5).

8. The raw material screening device for chicken feed processing according to claim 2, characterized in that: An adjustment mechanism is further provided above the base (1). The connecting rod (9) is a regular octagonal column. The adjustment mechanism comprises a regular octagonal sleeve (48) sleeved on the outside of the connecting rod (9). A plurality of step grooves (49) are provided on the outside of the regular octagonal sleeve (48). A plurality of limiting holes (50) are provided on the eight side surfaces of the connecting rod (9). A plurality of latches (51) are installed at the lower end of the regular octagonal sleeve (48). One end of the latches (51) can be inserted into the limiting holes (50). A regular octagonal groove (52) is provided at the lower end of the rotating column (10). The upper end of the regular octagonal sleeve (48) can extend into the regular octagonal annular groove (52).

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