Flour mill applied to feed processing line

Abstract

The utility model relates to a flour mill applied to a feed processing line. Comprising a main rack, a grinding box body is fixedly connected to the main rack, and a smashing discharging hopper and a screening pore plate are installed in the grinding box body; a lifting barrel shell provided with a discharge hole is arranged above the screening pore plate; a rotating shaft and a lifting motor are further included; a lifting auger is mounted on the rotating shaft; two groups of grinding rollers are rotationally connected in the grinding box body; the grinding device further comprises a crushing driving device; the rotating shaft is slidably sleeved with an ejector pin device and provided with a reciprocating driving device. The device further comprises a grading screening device. The grading screening device comprises a shell assembly, a conveying auger and a screening barrel are installed in the shell assembly, and a plurality of small screening holes and a plurality of large screening holes are formed in the peripheral wall of the screening barrel. And a transmission driving device is further included. According to the utility model, materials which do not meet the particle size requirement can be automatically recovered and crushed again, the pore plate can be automatically cleaned, and the crushed materials can be classified and screened at the same time.

Description

Technical Field

[0001] The utility model belongs to the technical field of feed processing equipment, and in particular relates to a grinding machine used in a feed processing line. Background Art

[0002] Feed is a general term for food for animals raised by all people. In a narrower sense, general feed mainly refers to food for animals raised in agriculture or animal husbandry. Feed includes more than ten varieties of feed raw materials such as soybeans, soybean meal, corn, fish meal, amino acids, miscellaneous meal, whey powder, oils, meat and bone meal, grains, feed additives, etc. In the existing feed processing process, the feed needs to be crushed by crushing, so it needs to be crushed with the help of a grinder.

[0003] The existing traditional grinding mill has a relatively simple structure, mainly including a grinding box with a feed port at the upper end and a discharge port at the lower end. Pairs of crushing rollers are installed in the grinding box, and also includes a driving component for driving the crushing rollers to rotate. In the actual working process, the materials put into the crushing box are crushed by two sets of crushing rollers rotating in opposite directions. A perforated plate with a plurality of screening holes is provided under the two sets of crushing rollers for filtering and screening the crushed materials to intercept large particles that do not meet the crushing requirements.

[0004] In the actual working process, it is found that the existing grinding mill cannot automatically recover and re-crush the large particle materials trapped on the orifice plate during the grinding process. It is necessary to stop the machine for manual cleaning after the grinding operation is completed. The operation process is cumbersome. Moreover, during the grinding operation, large-particle materials will accumulate on the orifice plate, which will affect the normal filtering and screening function of the orifice plate and even block the screening holes on the orifice plate, so that materials that meet the particle size requirements and materials that do not meet the particle size requirements are both trapped on the orifice plate, affecting the normal operation of the grinding mill and reducing the working efficiency of the grinding mill. In addition, the above-mentioned existing grinding mill cannot perform graded screening operations on the crushed materials. The crushed materials need to be collected and transferred to the screening device for screening operations. The operation process is cumbersome. Therefore, it is urgent to design a grinding mill for feed processing lines to solve the above problems. Utility Model Content

[0005] The utility model provides a milling machine with a reasonable structural design for use in feed processing lines to solve the technical problems existing in the known technologies. The utility model can automatically recycle and re-crush the intercepted materials that do not meet the particle size requirements, and can automatically clean the orifice plate, with high working efficiency and good grinding effect. At the same time, the crushed materials can be graded and screened without transferring them to other screening devices for screening, and the operation process is simple and convenient.

[0006] The utility model adopts the following technical scheme to solve the technical problems existing in the known technology: a grinding machine applied to a feed processing line comprises a main frame, a grinding box body with a pouring port at the top and a discharge port at the bottom is fixedly connected to the main frame, a crushing discharge hopper is installed in the middle of the grinding box body, and a screening hole plate is installed at the discharge port at the lower end of the crushing discharge hopper; a lifting cylinder shell with a lower end portion fitted with the screening hole plate is arranged above the screening hole plate, and a discharge port is opened at the upper part of the lifting cylinder shell; it also comprises a rotating shaft which is rotatably connected with the grinding box body and arranged longitudinally and is arranged in the middle of the grinding box body, the rotating shaft passes through the lifting cylinder shell and the screening hole plate, and also comprises a lifting motor for driving the rotating shaft to rotate; a lifting cylinder shell located in the lifting cylinder shell is installed on the outer peripheral wall of the rotating shaft An auger; two groups of grinding rollers located below the discharge port of the lifting cylinder shell are rotatably connected in the grinding box body, and also include a crushing drive device for driving the two groups of grinding rollers to rotate; a pin device located below the screening hole plate is slidably sleeved on the rotating shaft, and a reciprocating drive device for driving the pin device to reciprocate and move up and down is installed on the rotating shaft; it also includes a grading screening device located below the discharge port of the grinding box body installed on the main frame; the grading screening device includes a shell assembly installed on the main frame, a rotatable transmission auger is installed inside the shell assembly, and a screening cylinder is provided on the outer sleeve of the transmission auger, and a plurality of small sieve holes and a plurality of large sieve holes distributed along its axial direction are opened on the outer peripheral wall of the screening cylinder; it also includes a transmission drive device for driving the transmission auger to rotate.

[0007] The advantages and positive effects of the utility model are as follows: the utility model provides a grinding machine applied to a feed processing line, which can crush and grind materials put into a grinding box by arranging two groups of grinding rollers, and can perform primary screening on the crushed materials by arranging a screening plate with a plurality of sieve holes, so that materials that meet the requirements fall downwards, and materials that do not meet the requirements are intercepted, and by arranging a rotating shaft and a lifting auger, in cooperation with a lifting cylinder shell, materials that do not meet the requirements intercepted by the screening plate can be lifted upwards and put into between the two groups of grinding rollers for re-crushing operations; by arranging a pin device and a reciprocating drive device, the purpose of cleaning the plurality of sieve holes on the screening plate can be achieved, and the sieve holes can be prevented from being blocked and affecting the normal operation of the grinding machine; by arranging a shell assembly, a transmission auger, and a screening cylinder with a plurality of small sieve holes and a plurality of large sieve holes, the crushed materials can be graded and screened. The utility model can automatically recycle and re-crush the intercepted materials that do not meet the particle size requirements, and can automatically clean the orifice plate to avoid the orifice plate from being blocked during operation and affecting the normal operation of the mill. The work efficiency is high and the grinding effect is good. The crushed materials can be screened without transferring them to other screening devices for screening, and the operation process is simple and convenient.

[0008] Preferably, it also includes a plurality of groups of stirring paddles installed on the rotating shaft and distributed along the axial direction thereof, and the plurality of groups of stirring paddles are all located below the reciprocating drive device.

[0009] Preferably, the invention also includes a feed guide plate and a feed guide block installed on the inner closure of the grinding box and located above the two groups of grinding rollers, for guiding the materials fed from the pouring port to between the two groups of grinding rollers.

[0010] Preferably: the ejector device comprises a sliding mounting sleeve movable along the axial direction of the rotating shaft, a plurality of groups of ejector mounting rods radially distributed along the radial direction of the rotating shaft are fixedly connected to the sliding mounting sleeve, a plurality of groups of cleaning ejectors are installed on each ejector mounting rod, and each cleaning ejector is respectively and one by one inserted into a plurality of sieve holes opened on the sieve plate; it also comprises at least two groups of protrusion connecting plates fixedly connected to the sliding mounting sleeve through a rod, an arc-shaped protrusion is fixedly connected to the top surface of each protrusion connecting plate; at least two groups of protrusion connecting plates are evenly distributed along the circumferential direction.

[0011] Preferably: the reciprocating drive device includes a guide inner sleeve keyed on the rotating shaft, and the sliding mounting sleeve is slidably inserted and matched with the guide inner sleeve; two accommodating grooves that are oppositely arranged and extend along its axial direction are opened on the outer peripheral wall of the guide inner sleeve, and a spring top plate is arranged at the bottom of each accommodating groove; a tightening spring is arranged in each accommodating groove, and the upper and lower ends of the tightening spring are respectively in tight contact with the bottom surface of the sliding mounting sleeve and the top surface of the corresponding spring top plate; and it also includes a pressing drive structure fixedly connected to the outer peripheral wall of the guide inner sleeve and can rotate synchronously with it, which is used to press the arc-shaped protrusion downward.

[0012] Preferably: the pressing drive structure includes at least two groups of mounting support plates fixedly connected to the outer peripheral wall of the guide inner sleeve, and the number of the mounting support plates is consistent with the number of the protrusion connecting plates; at least two groups of mounting support plates are evenly distributed along the circumferential direction, and an L-shaped mounting plate is fixedly connected to the outer end of each mounting support plate, and a pressing roller is rotatably connected to the bottom surface of the top end of each L-shaped mounting plate, and during the rotation of the guide inner sleeve, each pressing roller collides and cooperates with each arc-shaped protrusion in turn.

[0013] Preferably: the shell assembly includes a screening shell with an open lower end fixed to the main frame, a screening discharge hopper is connected to the open part of the screening shell, and a chamber partition is fixed to the space formed by the screening shell and the screening discharge hopper to divide the space into two front and rear chambers; the screening cylinder is installed in the inner cavity of the screening shell and passes through the chamber partition; the front end of the screening shell is connected to the discharge cylinder shell, the bottom of the discharge cylinder shell is connected to the discharge chute, the rear end of the screening shell is connected to the transmission cylinder shell, and a screening feed hopper connected to the inner cavity of the transmission cylinder shell is installed on the outer peripheral wall of the transmission cylinder shell, and the screening feed hopper is connected to the discharge port of the grinding box; the transmission auger is rotatably arranged in the discharge cylinder shell, the screening shell and the transmission cylinder shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the main cross-sectional structure of the utility model;

[0015] Figure 2 It is a three-dimensional structural schematic diagram of the ejector device and the reciprocating drive device in the utility model;

[0016] Figure 3 It is a three-dimensional structural schematic diagram of the lower main body of the utility model.

[0017] In the figure: 1, screening cylinder; 2, small screen hole; 3, large screen hole; 4, partition plate; 5, discharge slide; 6, discharge cylinder shell; 7, screening shell; 8, screening feed hopper; 9, rotating shaft; 10, stirring paddle; 11, ejector device; 11-1, arc-shaped protrusion; 11-2, protrusion connecting plate; 11-3, sliding mounting sleeve; 11-4, ejector mounting rod; 11-5, cleaning ejector; 12, lifting spiral blade; 13, lifting cylinder shell; 14, grinding box; 15, feed guide plate; 16, lifting motor; 17, pouring port; 18, Feed guide block; 19, grinding roller; 20, screening hole plate; 21, crushing hopper; 22, reciprocating drive device; 22-1, L-shaped mounting plate; 22-2, pressing roller; 22-3, guide inner sleeve; 22-4, mounting support plate; 22-5, spring top plate; 22-6, tightening spring; 23, transmission cylinder shell; 24, transmission auger; 25, screening hopper; 26, transmission drive assembly; 26-1, transmission motor; 26-2, driving pulley; 26-3, driven pulley; 27, main frame; 28, drive mounting frame. DETAILED DESCRIPTION

[0018] In order to further understand the content, features and effects of the present invention, the following embodiments are described in detail as follows:

[0019] See also Figure 1 The milling machine used in the feed processing line of the utility model comprises a main frame 27, on which a milling box 14 with a pouring port 17 at the top and a discharge port at the bottom is fixed, a crushing discharge hopper 21 is installed in the middle of the milling box 14, and a screening plate 20 is installed at the discharge port at the lower end of the crushing discharge hopper 21; a lifting cylinder shell 13 with a clearance fit at the lower end of the screening plate 20 is arranged above the screening plate 20, and a discharge port is opened at the upper part of the lifting cylinder shell 13. The outer peripheral wall of the lifting cylinder shell 13 is connected to the inner wall of the milling box 14 through a plurality of rods.

[0020] Furthermore, the present embodiment further comprises a rotating shaft 9 which is rotatably connected to the grinding box 14 and arranged longitudinally, and the rotating shaft 9 passes through the lifting cylinder shell 13 and the screening plate 20, and further comprises a lifting motor 16 for driving the rotating shaft 9 to rotate, and a lifting auger 12 located in the lifting cylinder shell 13 is installed on the outer peripheral wall of the rotating shaft 9. Two groups of grinding rollers 19 located below the discharge port of the lifting cylinder shell 13 are rotatably connected in the grinding box 14, and further comprises a crushing drive device which drives the two groups of grinding rollers 19 to rotate; the crushing drive device comprises a driving motor installed on the grinding box 14, and the output shaft of the driving motor is selectively connected to one of the two groups of grinding rollers 19, and transmission gears are key-connected to the ends of the two groups of grinding rollers 19, and the two groups of transmission gears are meshed.

[0021] In addition, if Figure 1 As shown, this embodiment also includes a feed guide plate 15 and a feed guide block 18 installed on the inner wall of the grinding box 14 and located above the two groups of grinding rollers 19, which are used to guide the materials fed from the pouring port 17 to between the two groups of grinding rollers 19.

[0022] like Figure 1 As shown, a pin device 11 located below the screening plate 20 is slidably sleeved on the rotating shaft 9, and a reciprocating drive device 22 for driving the pin device 11 to move up and down reciprocatingly is installed on the rotating shaft 9. Figure 2 The ejector device 11 comprises a sliding mounting sleeve 11-3 which can move along the axial direction of the rotating shaft 9, and a plurality of ejector mounting rods 11-4 which are radially distributed along the radial direction of the rotating shaft 9 are fixedly connected to the sliding mounting sleeve 11-3, and a plurality of cleaning ejector pins 11-5 are installed on each ejector mounting rod 11-4, and each cleaning ejector pin 11-5 is inserted into a plurality of sieve holes opened on the sieve plate 20 in a one-to-one correspondence; in addition, as Figure 1 As shown, the plurality of sieve holes opened on the sieve plate 20 are all in an inverted funnel shape with a small top and a large bottom, so that each cleaning ejector pin 11-5 can be inserted into the corresponding sieve hole and can move up and down to achieve the purpose of cleaning the sieve hole and avoiding blockage. The ejector pin device 11 also includes at least two groups of protrusion connecting plates 11-2 fixedly connected to the sliding mounting sleeve 11-3 through a rod, and an arc-shaped protrusion 11-1 is fixedly connected to the top surface of each protrusion connecting plate 11-2, wherein the at least two groups of protrusion connecting plates 11-2 are evenly distributed along the circumferential direction.

[0023] In addition, if Figure 2As shown, the above-mentioned reciprocating drive device 22 includes a guide inner sleeve 22-3 keyed on the rotating shaft 9, and the sliding mounting sleeve 11-3 is slidably inserted and matched with the guide inner sleeve 22-3; two receiving grooves that are oppositely arranged and extend along its axial direction are opened on the outer peripheral wall of the guide inner sleeve 22-3, and a spring top plate 22-5 is arranged at the bottom of each receiving groove. In addition, a tightening spring 22-6 is arranged in each receiving groove, and the upper and lower ends of the tightening spring 22-6 are respectively in tight contact with the bottom surface of the sliding mounting sleeve 11-3 and the top surface of the corresponding spring top plate 22-5.

[0024] The reciprocating drive device 22 also includes a pressing drive structure fixed on the outer peripheral wall of the guide inner sleeve 22-3 and capable of rotating synchronously therewith, for pressing the arc-shaped protrusion 11-1 downward. The pressing drive structure includes at least two groups of mounting support plates 22-4 fixed on the outer peripheral wall of the guide inner sleeve 22-3, the number of mounting support plates 22-4 being the same as the number of protrusion connecting plates 11-2; at least two groups of mounting support plates 22-4 are evenly distributed along the circumferential direction, an L-shaped mounting plate 22-1 is fixed to the outer end of each mounting support plate 22-4, and a pressing roller 22-2 is rotatably connected to the top bottom surface of each L-shaped mounting plate 22-1, and during the rotation of the guide inner sleeve 22-3, each pressing roller 22-2 sequentially collides and cooperates with each arc-shaped protrusion 11-1.

[0025] In this embodiment, the above-mentioned protrusion connecting plate 11-2 and the mounting support plate 22-4 are provided in two groups; in addition, a roller seat is fixedly connected to the bottom surface of each L-shaped mounting plate 22-1, and each pressing roller 22-2 is rotatably mounted on the corresponding roller seat.

[0026] In addition, in order to prevent the material from being blocked at the discharge port of the grinding box 14, Figure 1 As shown, this embodiment further includes a plurality of groups of stirring paddles 10 installed on the rotating shaft 9 and distributed along the axial direction thereof, and the plurality of groups of stirring paddles 10 are all located below the reciprocating drive device 22 .

[0027] In order to grade and screen the materials after crushing and grinding, Figure 1 As shown, this embodiment also includes a grading and screening device installed on the main frame 27 and located below the discharge port of the grinding box 14; wherein, the grading and screening device includes a shell assembly installed on the main frame 27, a rotatable transmission auger 24 is installed inside the shell assembly, and a screening drum 1 is provided on the outer sleeve of the transmission auger 24, and a plurality of small sieve holes 2 and a plurality of large sieve holes 3 distributed along its axial direction are provided on the outer peripheral wall of the screening drum 1; and also includes a transmission drive device 26 for driving the transmission auger 24 to rotate.

[0028] See also Figure 1 and Figure 3The above-mentioned shell assembly includes a screening shell 7 with an open lower end fixed on the main frame 27, a screening discharge hopper 25 is connected to the open lower end of the screening shell 7, and a cavity partition 4 is fixed to the space formed by the screening shell 7 and the screening discharge hopper 25 to divide it into two front and rear chambers; the screening cylinder 1 is installed in the inner cavity of the screening shell 7 and passes through the cavity partition 4; the front end of the screening shell 7 is connected to the discharge cylinder shell 6, the bottom of the discharge cylinder shell 6 is connected to the discharge chute 5, and the rear end of the screening shell 7 is connected to the transmission cylinder shell 23, and a screening feed hopper 8 connected to its inner cavity is installed on the outer peripheral wall of the transmission cylinder shell 23, and the screening feed hopper 8 is connected to the discharge port of the grinding box 14; the transmission auger 24 is rotatably arranged in the discharge cylinder shell 6, the screening shell 7 and the transmission cylinder shell 23. In addition, a section of the screening cylinder 1 with a plurality of large sieve holes 3 and another section with a plurality of small sieve holes 2 correspond to the front and rear chambers separated by the chamber partition 4, respectively.

[0029] In addition, if Figure 1 As shown, a drive mounting frame 28 is mounted on the main frame 27, and the transmission drive device 26 is mounted on the drive mounting frame 28. Figure 3 As shown, the transmission drive device 26 includes a transversely arranged transmission motor 26-1 mounted on a driving mounting frame 28, a driving pulley 26-2 is keyed to the output shaft of the transmission motor 26-1, and also includes a driven pulley 26-3 keyed to the outer end of the transmission auger 24, and a belt in a closed state is connected for transmission between the driving pulley 26-2 and the driven pulley 26-3; the driving pulley is a small pulley, and the driven pulley is a large pulley; in addition, the driving mounting frame 28 includes a profile mounted on the main frame 27, and a protective cover is installed on the profile and is arranged outside the driving pulley and the driven pulley.

[0030] like Figure 1 As shown, in order to prevent the dust generated during the crushing and grinding operation from spreading, a plurality of air holes are opened on the side wall of the lower part of the grinding box 14, and an air collecting hood is installed on the air holes, and the air collecting hood is connected to the fan through a pipeline.

[0031] Working process:

[0032] The material to be crushed and ground is put into the grinding box 14 at the pouring port 17. Under the guidance of the feed guide plate 15 and the feed guide block 18, the material falls between the two groups of grinding rollers 19. The two groups of grinding rollers 19 rotating in opposite directions can crush and grind the material. The crushed and ground material falls onto the screening plate 20 under the guidance of the crushing discharge hopper 21. Under the screening and filtering action of the screening plate 20, the powder material that meets the crushing requirements falls from the sieve holes on the screening plate 20, and the large-sized particles that do not meet the requirements are retained on the screening plate 20. At the same time, the rotating shaft 9 and the lifting auger 12 can lift and transport the material retained by the screening plate 20 upward along the lifting cylinder shell 13, and re-transmit the material that does not meet the requirements to between the two groups of grinding rollers 19 for re-crushing.

[0033] At the same time, the rotating shaft 9 can drive the reciprocating drive device 22 installed thereon to rotate synchronously, and cooperate with the tightening spring 22-6 to drive the ejector device 11 to move back and forth periodically, thereby cleaning the screening plate 20 to avoid blockage of the sieve holes on the screening plate 20; the crushed powder particles fall from the discharge port of the grinding box 14 to the screening feed hopper 8, and then are transmitted forward under the drive of the rotating transmission auger 24. In the process of forward transmission, the several small sieve holes 2 and the several large sieve holes 3 opened on the screening cylinder 1 can perform multi-stage screening on the crushed materials that meet the requirements, thereby obtaining powder materials of different particle sizes.

Claims

1. A grinding machine used in a feed processing line, characterized by: The invention comprises a main frame (27), a grinding box (14) having a pouring port (17) at the top and a discharge port at the bottom fixedly connected to the main frame (27), a crushing discharge hopper (21) installed in the middle of the grinding box (14), a screening plate (20) installed at the discharge port at the lower end of the crushing discharge hopper (21); a lifting cylinder shell (13) having a lower end that is gap-matched with the screening plate (20) is installed above the screening plate (20), and a lifting cylinder shell (13) is installed at the lifting cylinder shell (13) ) is provided with a discharge port at the top; it also includes a rotating shaft (9) which is rotatably connected to the grinding box (14) and is longitudinally arranged and passes through the middle of the grinding box (14); the rotating shaft (9) passes through the lifting cylinder shell (13) and the screening plate (20); and it also includes a lifting motor (16) for driving the rotating shaft (9) to rotate; a lifting auger (12) located in the lifting cylinder shell (13) is installed on the outer peripheral wall of the rotating shaft (9); a lifting auger (12) located in the lifting cylinder shell (13) is rotatably connected in the grinding box (14) The invention relates to a grinding machine for grinding powder. The invention relates to a grinding machine for grinding powder. The grinding machine comprises two groups of grinding rollers (19) below the discharge port of the lifting cylinder shell (13), and also comprises a pulverizing driving device for driving the two groups of grinding rollers (19) to rotate; a pin device (11) located below the screening plate (20) is slidably sleeved on the rotating shaft (9), and a reciprocating driving device (22) for driving the pin device (11) to reciprocate and move up and down is installed on the rotating shaft (9); and also comprises a grading screening device installed on the main frame (27) and located below the discharge port of the grinding box body (14); the grading screening device comprises a housing assembly installed on the main frame (27), a rotatable transmission auger (24) is installed inside the housing assembly, and a screening cylinder (1) is provided on the outer casing of the transmission auger (24), and a plurality of small sieve holes (2) and a plurality of large sieve holes (3) are provided on the outer peripheral wall of the screening cylinder (1) and distributed along its axial direction; and also comprises a transmission driving device (26) for driving the transmission auger (24) to rotate.

2. The mill for feed processing line according to claim 1, characterized in that: It also includes a plurality of groups of stirring paddles (10) installed on the rotating shaft (9) and distributed along the axial direction thereof, wherein the plurality of groups of stirring paddles (10) are all located below the reciprocating drive device (22).

3. The grinding machine for feed processing line according to claim 1, characterized in that: The invention also comprises a feed guide plate (15) and a feed guide block (18) installed on the inner closure of the grinding box (14) and located above the two groups of grinding rollers (19), and used for guiding the materials fed from the pouring port (17) to between the two groups of grinding rollers (19).

4. The grinding machine for feed processing line according to claim 1, characterized in that: The ejector device (11) comprises a sliding mounting sleeve (11-3) movable along the axial direction of the rotating shaft (9); a plurality of groups of ejector mounting rods (11-4) radially distributed along the radial direction of the rotating shaft (9) are fixedly connected to the sliding mounting sleeve (11-3); a plurality of groups of cleaning ejectors (11-5) are installed on each ejector mounting rod (11-4); each cleaning ejector (11-5) is inserted into a plurality of sieve holes provided on the sieve plate (20) in a one-to-one correspondence; and at least two groups of protrusion connecting plates (11-2) fixedly connected to the sliding mounting sleeve (11-3) through a rod; an arc-shaped protrusion (11-1) is fixedly connected to the top surface of each protrusion connecting plate (11-2); and the at least two groups of protrusion connecting plates (11-2) are evenly distributed along the circumferential direction.

5. The grinding machine for feed processing line as claimed in claim 4, characterized in that: The reciprocating drive device (22) comprises a guide inner sleeve (22-3) key-connected on a rotating shaft (9), and a sliding mounting sleeve (11-3) slidingly penetrates and cooperates with the guide inner sleeve (22-3); two receiving grooves arranged opposite to each other and extending along its axial direction are opened on the outer peripheral wall of the guide inner sleeve (22-3), and a spring top plate (22-5) is arranged at the bottom of each receiving groove; a pressing spring (22-6) is arranged in each receiving groove, and the upper and lower ends of the pressing spring (22-6) are respectively in pressing contact with the bottom surface of the sliding mounting sleeve (11-3) and the top surface of the corresponding spring top plate (22-5); and a pressing drive structure fixedly connected to the outer peripheral wall of the guide inner sleeve (22-3) and capable of rotating synchronously therewith is also included, and is used to press the arc-shaped protrusion (11-1) downward.

6. The mill for feed processing line according to claim 5, characterized in that: The pressing drive structure comprises at least two groups of mounting support plates (22-4) fixedly connected to the outer peripheral wall of the guide inner sleeve (22-3), the number of the mounting support plates (22-4) being consistent with the number of the convex block connecting plates (11-2); the at least two groups of mounting support plates (22-4) being evenly distributed along the circumferential direction, an L-shaped mounting plate (22-1) being fixedly connected to the outer end of each mounting support plate (22-4), a pressing roller (22-2) being rotatably connected to the bottom surface of the top end of each L-shaped mounting plate (22-1), and during the rotation of the guide inner sleeve (22-3), each pressing roller (22-2) sequentially collides and cooperates with each arc-shaped convex block (11-1).

7. The grinding machine for feed processing line according to claim 1, characterized in that: The housing assembly comprises a screening housing (7) fixedly connected to a main frame (27) and having an open lower end; a screening discharge hopper (25) is connected to the open portion of the screening housing (7); a cavity partition (4) is fixedly connected to the space formed by the screening housing (7) and the screening discharge hopper (25) to separate the space into two front and rear chambers; a screening cylinder (1) is installed in the inner cavity of the screening housing (7) and passes through the cavity partition (4); a screening outlet hopper (25) is connected to the front end of the screening housing (7) A material barrel shell (6) is connected to a discharge chute (5) at the bottom of the discharge barrel shell (6), and a transmission barrel shell (23) is connected to the rear end of the screening shell (7). A screening feed hopper (8) connected to the inner cavity of the transmission barrel shell (23) is installed on the outer peripheral wall of the transmission barrel shell (23), and the screening feed hopper (8) is connected to the discharge port of the grinding box (14); a transmission auger (24) is rotatably arranged in the discharge barrel shell (6), the screening shell (7) and the transmission barrel shell (23).

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