CN221156868U - Reducing mechanism is used in bio-fertilizer production - Google Patents

Abstract

The utility model relates to a crushing device for producing biofertilizer. The device comprises an outer shell, a feeding partition plate and a feeding device, wherein the bottom of the outer shell is provided with a discharge hole, the upper part of the outer shell is provided with a feeding hole, and a cavity of the feeding hole is partitioned into a first feeding channel and a second feeding channel by the feeding partition plate; the middle part of the outer shell is rotationally connected with a driven crushing roller and a driving crushing roller, and a cylindrical screen is arranged below the driven crushing roller and the driving crushing roller; the device also comprises a guide protective cover and a material blocking protective cover, wherein the upper ends of the guide protective cover and the material blocking protective cover form a middle feeding channel; the guide protective cover and the inner wall of the outer shell form a side blanking channel, an upper sieve plate is arranged above the side blanking channel, and the guide protective cover further comprises a cleaning brush and a movable driving assembly; the feeding device also comprises an unpowered roller, a feeding driving roller and a feeding table; the device also comprises a driving assembly; and a feed gate arranged between the feed table and the discharge port of the second feed channel. The utility model can pre-screen the raw materials doped with a large amount of small granularity, and improves the working efficiency of the crushing device.

Description

Reducing mechanism is used in bio-fertilizer production

Technical Field

The utility model belongs to the technical field of bio-fertilizer production, and particularly relates to a crushing device for bio-fertilizer production.

Background

The biological organic fertilizer is prepared by fermenting organic solid wastes (including organic garbage, straw, human, livestock and poultry manure, cake, agricultural and sideline products and solid wastes generated by food processing) by microorganisms, deodorizing and completely decomposing. Therefore, in the process of producing the bio-organic fertilizer, a crushing device is needed. When the bio-fertilizer is produced, the raw materials are crushed by utilizing the crushing device, so that the particle size of the crushed materials meets the production requirement.

However, the existing crushing device has a single structure, the raw materials cannot be subjected to pre-screening operation, when a large amount of raw materials with small granularity are required to be crushed, the crushing efficiency is reduced if the crushing operation is directly performed, and the labor intensity of workers is improved if the crushing operation is performed again after the manual screening operation is performed, so that the operation process is complicated, and the working efficiency is reduced; in addition, the existing crushing device does not have the function of splashing prevention of materials, so that the environment is easily polluted and the materials are wasted.

Disclosure of utility model

The utility model provides a crushing device for producing biofertilizer, which is reasonable in structural design and aims to solve the technical problems in the prior art. The utility model can pre-screen the raw materials doped with a large amount of small granularity, and improves the working efficiency of the crushing device.

The utility model adopts the technical proposal for solving the technical problems in the prior art that: the crushing device for producing the biological fertilizer comprises an outer shell, wherein the bottom of the outer shell is provided with a discharge hole, the upper part of the outer shell is provided with a feed hole, a feed division plate is arranged in the feed hole, and an inner cavity of the feed hole is divided into a first feed channel and a second feed channel; the middle part of the outer shell is rotationally connected with a driven crushing roller and a driving crushing roller which are correspondingly arranged, and a cylinder screen is arranged below the driven crushing roller and the driving crushing roller; the guide protection cover is covered outside the back surface of the driven crushing roller, and the material blocking protection cover is covered outside the back surface of the driving crushing roller, and the upper ends of the guide protection cover and the material blocking protection cover form a middle feeding channel for materials to pass through; the guide protective cover and the inner wall of the outer shell form a side blanking channel, an upper screen plate which is positioned below the first feeding channel and is obliquely arranged is arranged above the side blanking channel, the guide protective cover further comprises a cleaning brush which is arranged below the upper screen plate and is used for cleaning the upper screen plate, and the guide protective cover further comprises a movable driving component which is used for driving the cleaning brush to move; the feeding device also comprises an unpowered roller which is rotationally connected with the discharge end of the second feeding channel and a feeding driving roller which is rotationally connected with the feed end of the middle feeding channel, wherein the unpowered roller and the feeding driving roller are correspondingly arranged, and a feeding table is arranged between the unpowered roller and the feeding driving roller; the driving assembly is arranged on the outer shell and has a rotary driving function; the feeding device further comprises a feeding door which is arranged between the feeding table and the discharging hole of the second feeding channel and is movably connected with the outer shell.

The utility model has the advantages and positive effects that: the utility model provides a crushing device for bio-fertilizer production, which can carry out the pre-filtering operation and the drainage operation on the input materials doped with small particles by arranging the upper screen plate, thereby avoiding the crushing device from crushing the materials with the small particles, improving the crushing efficiency, simultaneously avoiding the crushing of the materials with the small particles into powder, and improving the quality of products; the cleaning brush and the movable driving assembly are arranged, so that the upper screen plate can be cleaned regularly, and the phenomenon that the upper screen plate is blocked after long-time work is avoided, and the filtering effect of the upper screen plate is influenced; the driven crushing roller and the driving crushing roller are arranged, so that large-particle materials which do not meet production requirements can be crushed, and the cylindrical screen is arranged, so that the crushed materials can be subjected to the process of remembering; through setting up unpowered roller, charging station and feeding drive roll, can carry out the transmission to the material of macroparticle, throw into the material of macroparticle in the feed channel, play the purpose of separating second feed channel and well feed channel simultaneously, avoid smashing in-process material to splash to reducing mechanism's outside, in addition, through setting up the feed gate, can further play the shutoff effect, avoid reducing mechanism in-process material to splash out from the feed inlet and pollute operational environment, also avoid the waste of material simultaneously.

Preferably: the stirring device also comprises a stirring shaft which is rotationally connected with the inner cavity of the cylindrical screen, wherein the stirring shaft is provided with a driving crushing roller, and the stirring shaft is connected with a driving assembly.

Preferably: the feeding device also comprises a material blocking baffle plate arranged between the feeding driving roller and the upper end part of the material blocking protective cover and used for guiding materials into the middle feeding channel.

Preferably: the upper sieve plate is obliquely arranged, the oblique direction of the upper sieve plate is gradually close to the first feeding channel from bottom to top, and the lower end part of the upper sieve plate is positioned above the middle feeding channel.

Preferably: the movable driving assembly comprises at least two groups of driving screw rods which are connected with the inner wall of the outer shell in a rotating way and are obliquely arranged, and the inclination direction of the driving screw rods is consistent with that of the upper sieve plate; the driving screw rods are respectively screwed with nuts, and the cleaning brush is connected with each nut; the device also comprises a movable screw driving unit for driving at least two groups of driving screws to synchronously rotate.

Preferably: the screw driving unit comprises a movable mounting seat fixedly connected to the inner wall of the outer shell, a rotating shaft seat is fixedly connected to the movable mounting seat, a movable rotating shaft which is parallel to the driving screw is rotatably connected between the rotating shaft seat and the movable mounting seat, a driving sprocket is connected to the movable rotating shaft in a key manner, and a driven sprocket is connected to each driving screw in a key manner, and a transmission chain is connected between the driving sprocket and each driven sprocket in a transmission manner; the device also comprises a gear motor for driving the movable rotating shaft to rotate.

Preferably: the driving assembly comprises a driving motor fixedly connected on the shell body, a crushing transmission pair is arranged between an output shaft of the driving motor and a rotating shaft of the driving crushing roller, a stirring transmission pair is arranged between the output shaft of the driving motor and the stirring shaft, a feeding transmission pair is arranged between a rotating shaft of the driven crushing roller and a rotating shaft of the feeding driving roller, and a linkage transmission pair is arranged between the rotating shaft of the driven crushing roller and the rotating shaft of the driving crushing roller.

Preferably: the feeding door comprises a swing arm hinged with the shell body through a pin shaft, and the position of the swing arm can be locked; an elliptical material blocking head is integrally formed at the end part of the swing arm, which is far away from the hinge point.

Drawings

FIG. 1 is a schematic cross-sectional front view of the present utility model;

FIG. 2 is a schematic rear view of the present utility model;

Fig. 3 is a schematic perspective view of a mobile driving assembly according to the present utility model.

In the figure: 1. an outer housing; 2. a side blanking channel; 3. a movement drive assembly; 3-1, moving the rotating shaft; 3-2, a driving sprocket; 3-3, driven sprocket; 3-4, a transmission chain; 3-5, driving a screw rod; 3-6, a rotating shaft seat; 3-7, moving the mounting seat; 3-8, tensioning wheel; 4. a first feed channel; 5. a feed divider plate; 6. an unpowered roller; 7. a second feed channel; 8. a feed inlet; 9. a feed gate; 10. a feed table; 11. a feed drive roll; 12. a medium feed channel; 13. a screen plate is arranged; 14. cleaning brushes; 15. a guide shield; 16. a driven pulverizing roller; 17. a slide guiding surface; 18. a cylindrical screen; 19. a discharge port; 20. a stirring rack; 21. a stirring shaft; 22. an active crushing roller; 23. a material blocking protective cover; 24. a material blocking baffle; 25. a drive assembly; 25-1, a driving motor; 25-2, crushing a transmission pair; 25-3, a feeding transmission pair; 25-4, stirring transmission pairs.

Detailed Description

For a further understanding of the utility model, its features and advantages, the following examples are set forth in detail:

Referring to fig. 1, the crushing device for bio-fertilizer production of the present utility model includes an outer shell 1, and a plurality of groups of supporting legs are fixedly connected to the bottom of the outer shell 1. A discharge hole 19 is arranged at the bottom of the outer shell 1, and a feed hole 8 is arranged at the upper part. A feed division plate 5 is arranged in the feed inlet 8 to divide the inner cavity of the feed inlet 8 into a first feed channel 4 and a second feed channel 7; in addition, in the present embodiment, the feed splitter plate 5 is disposed obliquely.

As shown in fig. 1, a driven crushing roller 16 and a driving crushing roller 22 which are correspondingly arranged are rotatably connected at the middle part of the outer shell 1 through rolling bearings, and a cylindrical screen 18 is arranged below the driven crushing roller 16 and the driving crushing roller 22; the material crushed by the driven crushing roller 16 and the driving crushing roller 22 falls into the cylindrical screen 18 under the action of gravity for filtering operation, and the filtered material falls out of the outer housing 1 from the discharge port 19 for collection by an operator.

The embodiment further comprises a stirring shaft 21 rotatably connected with the inner cavity of the cylindrical screen 18, and a driving crushing roller 22 is arranged on the stirring shaft 21, wherein the stirring shaft 21 is transversely arranged and positioned at the center of the cylindrical screen 18, the stirring frame 20 is of a door-shaped structure, the stirring shaft 21 is rotated to enable the stirring frame 20 to be turned over, materials in the cylindrical screen 18 are turned over, the filtering process of the cylindrical screen 18 is accelerated, and the phenomenon that the normal operation of the crushing device is influenced due to long-time retention of the materials in the cylindrical screen 18 is avoided.

As shown in fig. 1, the present embodiment further includes a guiding protection cover 15 covering the rear outer portion of the driven pulverizing roller 16 and a blocking protection cover 23 covering the rear outer portion of the driving pulverizing roller 22, and the upper ends of the guiding protection cover 15 and the blocking protection cover 23 form a middle feeding channel 12 through which the material can pass.

Wherein, the guiding protective cover 15 comprises an arc-shaped cover part which is covered outside the back surface of the driven crushing roller 16 and is arc-shaped, a plate is fixedly welded at the lower end part of the arc-shaped cover, and the lower end part of the plate points to the outside of the cylinder screen 18; the material blocking protective cover 23 comprises an arc-shaped cover part which is covered outside the back of the active crushing roller 22, a plate is fixedly connected to the lower end part of the arc-shaped cover part in a welding way, the lower end part of the plate points to the outside of the cylindrical screen 18 and is fixedly connected with the inclined inner wall of the discharge hole 19, and further the material crushed by the driven crushing roller 16 and the active crushing roller 22 can fall into the cylindrical screen 18 to be filtered.

With further reference to fig. 1, in this embodiment, the guide protection cover 15 and the inner wall of the outer casing 1 form a side blanking channel 2, and further includes a lower sliding guide surface 17 formed on the inner wall of the bottom surface of the outer casing 1 and located in the side blanking channel 2, for guiding the material filtered by the upper screen plate 13 into the discharge hole 19.

An upper screen plate 13 is arranged above the side blanking channel 2, below the first feeding channel 4 and is obliquely arranged, the upper screen plate 13 is obliquely arranged, the oblique direction of the upper screen plate 13 is gradually close to the first feeding channel 4 from bottom to top, and the lower end part of the upper screen plate 13 is positioned above the middle feeding channel 12. In the embodiment, the lower end part of the upper sieve plate 13 is connected with the upper end part of the guide protective cover 15 through a plate, so that larger materials trapped by the upper sieve plate 13 are guided into the middle feeding channel 12, and the guided materials are cut and crushed by the rotary driven crushing roller 16 and the driving crushing roller 22; meanwhile, the materials with smaller granularity enter the side discharging channel 2 after being filtered by the upper sieve plate 13, and flow to the discharging hole 19 under the guiding action of the guiding protective cover 15.

In order to avoid the filtering holes on the upper screen plate 13 being blocked by the material after long-time operation, the embodiment further comprises a cleaning brush 14 arranged below the upper screen plate 13 for cleaning the upper screen plate 13, and a movable driving assembly 3 for driving the cleaning brush 14 to move.

With further reference to fig. 3, in this embodiment, the mobile drive assembly 3 comprises at least two sets of obliquely arranged drive screws 3-5 rotatably connected to the inner wall of the outer casing 1, the direction of inclination of the drive screws 3-5 being in accordance with the direction of inclination of the upper screen deck 13. Nuts are screwed on the driving screw rods 3-5, and the cleaning brush 14 is connected with the nuts and further connected into a whole. The mobile drive assembly 3 further comprises a mobile screw drive unit for driving the at least two sets of drive screws 3-5 to rotate synchronously.

The screw driving unit comprises a movable mounting seat 3-7 fixedly connected to the inner wall of the outer shell 1, a rotating shaft seat 3-6 fixedly connected to the movable mounting seat 3-7, a movable rotating shaft 3-1 arranged in parallel with a driving screw 3-5 and rotatably connected between the rotating shaft seat 3-6 and the movable mounting seat 3-7, a driving chain wheel 3-2 connected to the movable rotating shaft 3-1 in a key manner, driven chain wheels 3-3 connected to the driving screws 3-5 in a key manner, and a transmission chain 3-4 connected between the driving chain wheel 3-2 and the driven chain wheels 3-3 in a transmission manner; and a gear motor for driving the moving shaft 3-1 to rotate. The above-mentioned gear motor is located outside the outer housing 1, and the drive screw 3-5 is provided with two groups.

In addition, the screw driving unit also comprises a sprocket plate with adjustable positions, which is arranged on the movable mounting seat 3-7, a strip-shaped hole extending along the length direction of the sprocket plate is formed in the sprocket plate, and the sprocket plate is connected with the movable mounting seat 3-7 through a screw penetrating through the strip-shaped hole; and a mandrel which is arranged in parallel with the driving screw rod 3-5 is fixedly connected on the sprocket plate, a tensioning wheel 3-8 is rotationally connected on the mandrel through a rolling bearing, and the tensioning wheel 3-8 is in transmission connection with a transmission chain 3-4.

With further reference to fig. 1, the present embodiment further includes an unpowered roller 6 rotatably connected at the discharge end of the second feeding channel 7, and further includes a feeding driving roller 11 rotatably connected at the feeding end of the middle feeding channel 12, the unpowered roller 6 and the feeding driving roller 11 being disposed correspondingly with a feeding stage 10 disposed therebetween; in this embodiment, the table top of the feeding table 10 is disposed obliquely, and the upper end of the table top is immediately adjacent to the unpowered roller 6 and the lower end is immediately adjacent to the feeding driving roller 11. A certain distance is left between the end of the feeding table 10 adjacent to the feeding driving roller 11 and the lower end of the inner wall of the feeding port 8 for the passage of the material fed from the second feeding passage 7.

In addition, a material blocking partition 24 is provided between the feeding drive roller 11 and the upper end portion of the material blocking shield 23 for introducing the material into the middle feeding path 12. Wherein, the upper end of the baffle plate 24 is fixedly connected with the inner wall of the outer shell 1, the lower end is fixedly connected with the upper end of the baffle shield 23, and then the material transmitted by the feeding driving roller 11 is guided into the middle feeding channel 12, and the rotary driven crushing roller 16 and the driving crushing roller 22 cut and crush the guided material.

As shown in fig. 1, the present embodiment further includes a feed gate 9 movably connected with the outer housing 1, which is provided between the feed table 10 and the discharge port of the second feed passage 7. Wherein the feeding door 9 comprises a swing arm hinged with the outer shell 1 through a pin shaft, and the position of the swing arm can be locked; an elliptical material blocking head is integrally formed at the end part of the swing arm, which is far away from the hinge point. In addition, a handle which is convenient to operate is arranged on a hinge pin shaft of the feeding door 9, a locking connecting notch is formed in the handle, a locking connecting nail which is matched with the locking connecting notch in a clamping way is arranged on the outer wall of the outer shell 1, and in a natural state, a material blocking head of the feeding door 9 is in contact with the top surface of the feeding table 10 to play a role in blocking, so that the environment is polluted due to material splashing and the waste of materials is avoided when the materials are crushed; when feeding operation is carried out, the feeding door 9 swings upwards under the pushing and pushing action of the materials sliding downwards, so that the blocking of the feeding channel is relieved, the materials can pass conveniently, and then the materials fall into the middle feeding channel 12 under the transmission action of the rotary feeding driving roller 11.

In addition, through setting up unpowered roller 6, feeding platform 10, feeding drive roll 11 and last sieve 13, can play the purpose of keeping off the material in the crushing process, further avoid the material spill.

As shown in fig. 1 and 2, the present embodiment further includes a driving assembly 25 mounted on the outer housing 1 and having a rotation driving function, wherein the driving assembly 25 includes a driving motor 25-1 fixedly connected to the outer housing 1, a pulverizing transmission pair 25-2 is mounted between an output shaft of the driving motor 25-1 and a rotation shaft of the driving pulverizing roller 22, wherein the pulverizing transmission pair 25-2 includes a driving pulley keyed to an output shaft of the driving motor 25-1, and a driven pulley keyed to a rotation shaft of the driving pulverizing roller 22, a belt in a closed state is drivingly connected between the driving pulley and the driven pulley, and a diameter of the driving pulley is smaller than a diameter of the driven pulley.

The driving assembly 25 further comprises a stirring transmission pair 25-4 installed between the output shaft of the driving motor 25-1 and the stirring shaft 21, wherein the stirring transmission pair 25-4 comprises a driving pulley keyed on the output shaft of the driving motor 25-1, and a driven pulley keyed on the stirring shaft 21, and a belt in a closed state is in transmission connection between the driving pulley and the driven pulley, and in addition, the diameter of the driving pulley is smaller than that of the driven pulley.

The driving assembly 25 further comprises a feeding transmission pair 25-3 arranged between the rotating shaft of the driven crushing roller 16 and the rotating shaft of the feeding driving roller 11, wherein the feeding transmission pair 25-3 comprises a large belt wheel connected with the rotating shaft of the driven crushing roller 16 in a key manner, and further comprises a small belt wheel connected with the rotating shaft of the feeding driving roller 11 in a key manner, and a belt in a closed state is connected between the large belt wheel and the small belt wheel in a transmission manner.

The driving assembly 25 further comprises a linkage transmission pair arranged between the rotating shaft of the driven crushing roller 16 and the rotating shaft of the driving crushing roller 22, wherein the linkage transmission pair can adopt a belt wheel transmission pair or a gear transmission pair; if a pulley transmission pair is adopted, the diameter of the pulley keyed on the rotating shaft of the driven crushing roller 16 is smaller than that of the pulley keyed on the rotating shaft of the driving crushing roller 22; if a gear transmission pair is adopted, the gears keyed on the rotation shaft of the driven pulverizing roller 16 and the gears keyed on the rotation shaft of the driving pulverizing roller 22 want to be meshed, and the diameters of the two gears are identical.

The working process comprises the following steps:

(1) When a large amount of small-granularity raw materials are required to be crushed, the raw materials are thrown into the inner cavity of the outer shell body 1 from the first feeding channel 4 of the feeding hole 8, large-granularity raw materials flow into the space between the driven crushing roller 16 and the driving crushing roller 22 under the filtering and guiding actions of the obliquely arranged upper screen plate 13, the small-granularity raw materials fall into the side discharging channel 2 from the screen holes formed in the upper screen plate 13 and fall onto the sliding guide surface 17, flow to the discharging hole 19 under the guiding actions of the sliding guide surface 17, and further fall to the outside of the crushing device. And then avoided reducing mechanism to smash the raw materials of granule, and then improved the crushing efficiency of device, improved product quality simultaneously.

(2) When large-particle raw materials or materials with a certain length are required to be crushed, the materials are thrown into the inner cavity of the outer shell 1 from the second feeding channel 7 of the feeding port 8, flow downwards under the guiding action of the unpowered roller 6 and the feeding table 10, further push the feeding door 9, enable the materials to flow to the feeding driving roller 11, fall into the middle feeding channel 12 under the transmission action of the feeding driving roller 11, fall between the driven crushing roller 16 and the driving crushing roller 22 through the middle feeding channel 12 for crushing operation, fall into the cylindrical screen 18 for filtering operation after the crushing operation of the driven crushing roller 16 and the driving crushing roller 22, and fall outside the crushing device through the discharging port 19; in addition, the stirring shaft 21 rotates to drive the stirring frame 20 to turn over, so as to turn over the material in the cylindrical screen 18, accelerate the filtering process of the cylindrical screen 18, and avoid the influence on the normal operation of the crushing device due to long-time retention of the material in the cylindrical screen 18.

Claims (8)

1. Reducing mechanism is used in bio-fertilizer production, characterized by: the device comprises an outer shell (1) with a discharge hole (19) at the bottom and a feed hole (8) at the upper part, wherein a feed division plate (5) is arranged in the feed hole (8) to divide an inner cavity of the feed hole (8) into a first feed channel (4) and a second feed channel (7); the middle part of the outer shell (1) is rotationally connected with a driven crushing roller (16) and a driving crushing roller (22) which are correspondingly arranged, and a cylindrical screen (18) is arranged below the driven crushing roller (16) and the driving crushing roller (22); the grinding machine also comprises a guide protection cover (15) which is covered outside the back surface of the driven grinding roller (16) and a material blocking protection cover (23) which is covered outside the back surface of the driving grinding roller (22), wherein the upper ends of the guide protection cover (15) and the material blocking protection cover (23) form a middle feeding channel (12) through which materials can pass; the guide protection cover (15) and the inner wall of the outer shell (1) form a side blanking channel (2), an upper screen plate (13) which is positioned below the first feeding channel (4) and is obliquely arranged is arranged above the side blanking channel (2), the guide protection cover further comprises a cleaning brush (14) which is arranged below the upper screen plate (13) and is used for cleaning the upper screen plate (13), and the guide protection cover further comprises a moving driving component (3) which is used for driving the cleaning brush (14) to move; the feeding device further comprises an unpowered roller (6) which is rotationally connected with the discharge end of the second feeding channel (7) and a feeding driving roller (11) which is rotationally connected with the feeding end of the middle feeding channel (12), wherein the unpowered roller (6) and the feeding driving roller (11) are correspondingly arranged, and a feeding table (10) is arranged between the unpowered roller and the feeding driving roller; the device also comprises a driving component (25) which is arranged on the outer shell (1) and plays a role in rotation driving; the device also comprises a feeding door (9) which is arranged between the feeding table (10) and the discharge hole of the second feeding channel (7) and is movably connected with the outer shell (1).

2. The crushing apparatus for producing biofertilizer according to claim 1, wherein: the stirring device is characterized by further comprising a stirring shaft (21) rotationally connected with the inner cavity of the cylindrical screen (18), wherein an active crushing roller (22) is arranged on the stirring shaft (21), and the stirring shaft (21) is connected with a driving assembly (25).

3. The crushing apparatus for producing biofertilizer according to claim 1, wherein: the feeding device also comprises a material blocking baffle plate (24) arranged between the feeding driving roller (11) and the upper end part of the material blocking protective cover (23) and used for guiding materials into the middle feeding channel (12).

4. The crushing apparatus for producing biofertilizer according to claim 1, wherein: the upper sieve plate (13) is obliquely arranged, the inclination direction of the upper sieve plate is gradually close to the first feeding channel (4) from bottom to top, and the lower end part of the upper sieve plate (13) is positioned above the middle feeding channel (12).

5. The pulverizing apparatus for producing a biological fertilizer according to claim 4, wherein: the movable driving assembly (3) comprises at least two groups of driving screw rods (3-5) which are rotatably connected on the inner wall of the outer shell (1) and are obliquely arranged, and the inclination direction of the driving screw rods (3-5) is consistent with the inclination direction of the upper sieve plate (13); nuts are screwed on the driving screw rods (3-5), and the cleaning brush (14) is connected with the nuts; the device also comprises a movable screw driving unit for driving at least two groups of driving screws (3-5) to synchronously rotate.

6. The pulverizing apparatus for producing a biological fertilizer according to claim 5, wherein: the screw driving unit comprises a movable mounting seat (3-7) fixedly connected to the inner wall of the outer shell (1), a rotating shaft seat (3-6) is fixedly connected to the movable mounting seat (3-7), a movable rotating shaft (3-1) parallel to the driving screw (3-5) is rotatably connected between the rotating shaft seat (3-6) and the movable mounting seat (3-7), a driving sprocket (3-2) is connected to the movable rotating shaft (3-1) in a key manner, a driven sprocket (3-3) is connected to each driving screw (3-5) in a key manner, and a transmission chain (3-4) is connected between the driving sprocket (3-2) and each driven sprocket (3-3); the device also comprises a gear motor for driving the movable rotating shaft (3-1) to rotate.

7. The crushing apparatus for producing biofertilizer as defined in claim 2, wherein: the driving assembly (25) comprises a driving motor (25-1) fixedly connected to the outer shell (1), a crushing transmission pair (25-2) is arranged between an output shaft of the driving motor (25-1) and a rotating shaft of the driving crushing roller (22), a stirring transmission pair (25-4) is arranged between the output shaft of the driving motor (25-1) and the stirring shaft (21), a feeding transmission pair (25-3) is arranged between a rotating shaft of the driven crushing roller (16) and a rotating shaft of the feeding driving roller (11), and a linkage transmission pair is arranged between the rotating shaft of the driven crushing roller (16) and the rotating shaft of the driving crushing roller (22).

8. The crushing apparatus for producing biofertilizer according to claim 1, wherein: the feeding door (9) comprises a swing arm hinged with the outer shell (1) through a pin shaft, and the position of the swing arm can be locked; an elliptical material blocking head is integrally formed at the end part of the swing arm, which is far away from the hinge point.