CN221753937U - A screening mechanism for producing soil conditioner - Google Patents

Abstract

The utility model discloses a screening mechanism for soil conditioner production, and relates to the technical field of soil conditioner production. The utility model includes a support seat, a vibration component is arranged inside the support seat, and a first screening cylinder is arranged on the top of the support seat. After the soil conditioner particles enter the interior of the first screening cylinder, the utility model can push the larger particles blocked by the sub-screen out of the outside of the first screening cylinder through the driving mechanism in cooperation with the first push-screen component, and quickly vibrate and screen the particles accumulated thereon along with the vibration of the sub-screen, so that the second push-screen component inside the second screening cylinder generates a pushing and screening action simultaneously with the vibration of the sub-screen inside it, so that the particles blocked by the secondary screening are pushed out of the outside of the second screening cylinder, and the sub-screen has a certain elasticity, thereby making the soil conditioner particles elastically contact with the sub-screen, so that it can avoid accidental rupture caused by collision and extrusion during screening, and improve the efficiency of powder screening operation.

Description

A screening mechanism for producing soil conditioner

Technical Field

The utility model belongs to the technical field of soil conditioner production, and in particular relates to a screening mechanism for soil conditioner production.

Background Art

Soil conditioner is a material specially designed to improve the physical and chemical properties and biological activity of soil. It is mainly composed of agricultural water retaining agent, natural mud rich in organic matter and humic acid, pure natural ore or other organic matter, supplemented with biologically active ingredients and nutrients. These ingredients are processed by scientific technology, making soil conditioner have significant functions such as water retention, soil loosening, fertilizer increase and ventilation.

In the prior art, after searching, Chinese Patent No. CN202022167576.0 discloses a spiral conveying and screening system for soil conditioners, including a cylinder body, which is supported by two support columns. A spiral shaft body moves through the inside of the cylinder body, and a motor for driving the spiral shaft body to rotate is connected to the left end of the spiral shaft body. A spiral blade is arranged on the spiral shaft body located inside the cylinder body, an upper hopper is arranged on the top left side of the cylinder body, and three lower hoppers are arranged on the bottom of the cylinder body from left to right in sequence. A plurality of sieve holes 1 are formed at the bottom of the cylinder body corresponding to the lower hopper located on the left side, a plurality of sieve holes 2 are formed at the bottom of the cylinder body corresponding to the lower hopper located in the middle, and a plurality of sieve holes 3 are formed at the bottom of the cylinder body corresponding to the lower hopper located on the right side.

Since the soil conditioner has a granular structure after production, it is necessary to screen and classify the mixed soil conditioner particles of different particle sizes during production. In the above scheme, the soil conditioner is screened by cooperating with a spiral shaft and multiple lower hoppers. If the transportation process is long, it may lead to a long screening process and the particles may easily break during transportation, resulting in reduced screening quality.

Currently, no effective solution has been proposed for the problems in the related technologies.

Utility Model Content

In view of the problems in the related technology, the utility model proposes a screening mechanism for producing soil conditioners to overcome the above technical problems existing in the existing related technology.

In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

The utility model discloses a screening mechanism for producing soil conditioners, comprising a support seat, a vibration assembly is arranged inside the support seat, a first screening cylinder is arranged on the top of the support seat, a second screening cylinder is fixedly installed on the bottom of the first screening cylinder, a third screening cylinder is fixedly installed on the bottom of the second screening cylinder, sub-screens are clamped on the inner walls of the first screening cylinder and the second screening cylinder, a top cover is arranged on the top of the first screening cylinder, a driving mechanism is arranged on the top of the top cover, a first screen-pushing assembly is threadedly connected to the output end of the driving mechanism, a second screen-pushing assembly is threadedly connected to the bottom of the first screen-pushing assembly, the top of the vibration assembly is fixedly connected to the bottom of the third screening cylinder, and a feed hopper is fixedly installed on the top of the top cover.

Furthermore, the vibration assembly includes a vibration motor, an output shaft is provided on the top of the vibration motor, and the vibration motor is located inside the support seat.

Furthermore, a cross support seat is arranged inside the support seat, a vibration spring is fixedly mounted on the top of the support seat, the top of the vibration spring is fixedly connected to the bottom of the third screening drum, and there are several vibration springs.

Furthermore, a discharge slot is provided on one side of the sub-screen, and a material guide port corresponding to the discharge slot is provided on the outer surfaces of the first screening cylinder and the second screening cylinder, and a material guide pipe is fixedly connected to the outer surfaces of the first screening cylinder and the second screening cylinder, and the material guide pipe is communicated with the interior of the material guide port.

Furthermore, the driving mechanism includes a driving motor, the driving motor is fixed to the top of the top cover, the output end of the driving motor is provided with a driving shaft, and the output end of the driving shaft is threadedly connected to the first screen pushing assembly.

Furthermore, the first screen pushing assembly includes a threaded sleeve, the threaded sleeve is threadedly connected to the output end of the driving shaft, and a screen pushing plate is fixedly mounted on the outer surface of the threaded sleeve.

Furthermore, the second screen pushing assembly includes a connecting shaft, the connecting shaft is threadedly connected to the inside of the threaded rotating sleeve, the outer surface of the connecting shaft is fixedly connected to the fixed rotating sleeve, and the outer surface of the fixed rotating sleeve is fixedly connected to the second screen pushing plate.

Furthermore, the internal thread of the fixed rotating sleeve is connected with a bottom rotating shaft, a push plate is fixedly installed on the outer surface of the bottom rotating shaft, and a discharge hopper is arranged on the outer surface of the third screening cylinder.

Furthermore, a support column is fixedly installed on the bottom of the support seat, and the number of the support columns is several.

Furthermore, both side surfaces of the sub-screen are fixedly connected with inner clamping blocks, and the inner walls of the first screening cylinder and the second screening cylinder are both provided with clamping grooves.

The utility model has the following beneficial effects:

1. The utility model arranges a vibration component inside the support seat and connects the vibration component to the bottom of the third screening cylinder, so that it drives the first screening cylinder and the second screening cylinder to vibrate. After the soil conditioner particles enter the first screening cylinder, the driving mechanism cooperates with the first pushing screen component to push the larger particles blocked by the sub-screen out of the first screening cylinder, and quickly vibrates and screens the particles accumulated on the sub-screen along with the vibration of the sub-screen, so that the second pushing screen component inside the second screening cylinder generates a pushing screen action simultaneously with the vibration of the sub-screen inside it, so that the particles blocked by the secondary screening are pushed out of the second screening cylinder, and the sub-screen has a certain elasticity, thereby making the soil conditioner particles elastically contact with the sub-screen, so that it can avoid accidental rupture caused by collision and extrusion during screening, and improve the powder screening operation efficiency.

2. The utility model connects the rotating shaft with the threaded rotating sleeve so that the driving shaft can drive the push screen plate and the second push screen plate to operate simultaneously, so that they have the same operating frequency, so that the discharge efficiency of the soil conditioner particles remains the same when they pass through the secondary screening, thereby improving the quality of the screening operation.

Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the utility model embodiments, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

FIG1 is a schematic diagram of the three-dimensional structure of the utility model;

FIG2 is a second schematic diagram of the three-dimensional structure of the utility model;

FIG3 is a schematic diagram of the support structure of the utility model;

FIG4 is a schematic diagram of the explosion structure of the first screening cylinder of the utility model;

Figure 5 is a schematic diagram of the structure of the push screen plate of the utility model;

FIG6 is a schematic diagram of the internal structure of the first screening cylinder of the present invention;

In the accompanying drawings, the components represented by the reference numerals are listed as follows:

1. Support seat; 2. Vibration assembly; 3. First screening cylinder; 4. Second screening cylinder; 5. Third screening cylinder; 6. Sub-screening net; 7. Top cover; 8. Driving mechanism; 9. First screen pushing assembly; 10. Second screen pushing assembly; 20. Feed hopper; 201. Vibration motor; 202. Output shaft; 11. Cross support seat; 12. Vibration spring; 13. Discharge slot; 14. Guide port; 15. Guide pipe; 801. Drive motor; 802. Drive shaft; 901. Threaded sleeve; 902. Screen pushing plate; 101. Connecting shaft; 102. Fixed sleeve; 103. Second screen pushing plate; 16. Bottom shaft; 17. Pushing plate; 18. Discharge hopper; 19. Support column; 21. Block.

DETAILED DESCRIPTION

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

In the description of the present utility model, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inside" and the like indicating orientation or positional relationship are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

Please refer to Figures 3 and 4. The utility model is a screening mechanism for producing soil conditioners, including a support base 1, a vibration assembly 2 is arranged inside the support base 1, a first screening cylinder 3 is arranged on the top of the support base 1, a second screening cylinder 4 is fixedly installed on the bottom of the first screening cylinder 3, a third screening cylinder 5 is fixedly installed on the bottom of the second screening cylinder 4, the inner walls of the first screening cylinder 3 and the second screening cylinder 4 are both clamped with a sub-screen 6, a top cover 7 is arranged on the top of the first screening cylinder 3, a driving mechanism 8 is arranged on the top of the top cover 7, a first screen pushing assembly 9 is threadedly connected to the output end of the driving mechanism 8, a second screen pushing assembly 10 is threadedly connected to the bottom of the first screen pushing assembly 9, the top of the vibration assembly 2 is fixedly connected to the bottom of the third screening cylinder 5, and a feed hopper 20 is fixedly installed on the top of the top cover 7.

When screening the soil conditioner particles, after the batch of particles are introduced into the first screening cylinder 3 through the feed hopper 20, the vibration component 2 inside the support seat 1 is started to drive the third screening cylinder 5 on the top to vibrate and drive the second screening cylinder 4 and the like to vibrate together. After the particles enter the first screening cylinder 3, they fall onto the upper surface of the sub-screen 6 on the inner wall thereof. At the same time, the driving mechanism 8 is started to drive the first push screen component 9 to rotate and drive the second push screen component 10 at the bottom to rotate. In this way, when the first screening cylinder 3 and the second screening cylinder 4 are driven to vibrate by the third screening cylinder 5, the first push screen component 9 rotates on the inner wall of the first screening cylinder 3 to push the particles to rotate, and the second pushing screen component 10 is driven to operate on the inner wall of the second screening cylinder 4. The particles on the inner wall of the first screening cylinder 3 follow the vibration of the sub-screen 6 and are pushed by the operation of the first pushing screen component 9 so that the particles smaller than the mesh of the sub-screen 6 fall into the sub-screen 6 inside the second screening cylinder 4, and the blocked larger particles are pushed by the rotation of the first pushing screen component 9 to generate centrifugal force to move toward the edge of the sub-screen 6 and gradually separate from it. Similarly, the second blocked particles inside the second screening cylinder 4 are pushed to the edge of the secondary sub-screen 6 and gradually separate from the interior.

The utility model arranges the vibration component 2 inside the support base 1 and connects the vibration component 2 with the bottom of the third screening cylinder 5, so that it drives the first screening cylinder 3 and the second screening cylinder 4 to vibrate. After the soil conditioner particles enter the first screening cylinder 3, the driving mechanism 8 cooperates with the first pushing screen component 9 to push the larger particles blocked on the sub-screen 6 out of the first screening cylinder 3, and quickly vibrates and screens the particles accumulated on the sub-screen 6 along with the vibration of the sub-screen 6, so that the second pushing screen component 10 inside the second screening cylinder 4 generates a pushing screen action simultaneously with the vibration of the sub-screen 6 inside it, so that the particles blocked by the secondary screening are pushed out of the second screening cylinder 4, and the sub-screen 6 has a certain elasticity, thereby making the soil conditioner particles elastically contact with the sub-screen 6, so as to avoid accidental rupture caused by collision and extrusion during screening, and improve the powder screening operation efficiency.

In one embodiment, for the vibration component 2 , the vibration component 2 includes a vibration motor 201 , an output shaft 202 is disposed on the top of the vibration motor 201 , and the vibration motor 201 is located inside the support base 1 .

The vibration motor 201 is fixed inside the support base 1, and its top output shaft 202 is connected to the bottom of the third screening cylinder 5, so that when the vibration motor 201 is started, its top output shaft 202 synchronously vibrates to drive the third screening cylinder 5 to vibrate, thereby providing a vibration driving source for the first screening cylinder 3 and the second screening cylinder 4, which is conducive to the rapid screening of soil conditioner particles of different particle sizes.

In one embodiment, for the above-mentioned support seat 1, a cross support seat 11 is arranged inside the support seat 1, a vibration spring 12 is fixedly installed on the top of the support seat 1, and the top of the vibration spring 12 is fixedly connected to the bottom of the third screening drum 5. There are several vibration springs 12.

The cross support seat 11 is fixed to the inner wall of the support seat 1 to increase its internal connection support strength while providing a stable support and fixing effect for the vibration motor 201, and is connected to the support seat 1 and the bottom of the third screening cylinder 5 through multiple groups of vibration springs 12, thereby increasing the elastic connection support effect between the support seat 1 and the third screening cylinder 5 while allowing the third screening cylinder 5 to have a certain vibration amplitude.

In one embodiment, for the above-mentioned sub-screen 6, a discharge slot 13 is provided on one side of the sub-screen 6, and the outer surfaces of the first screening cylinder 3 and the second screening cylinder 4 are both provided with a material guide port 14 corresponding to the discharge slot 13, and the outer surfaces of the first screening cylinder 3 and the second screening cylinder 4 are both fixedly connected with a material guide pipe 15, and the material guide pipe 15 is communicated with the interior of the material guide port 14.

The guide ports 14 on the outside of the first screening cylinder 3 and the second screening cylinder 4 are in different directions. When the particles on the sub-screen 6 are pushed to the outer edge, they move to the inside of the discharge slot 13 and continue to move to the inside of the corresponding guide port 14 accompanied by the vibration effect and are finally discharged through the guide pipe 15.

By arranging a material guide pipe 15 outside the material guide port 14, and the positions of the discharge slots 13 of the sub-screens 6 inside the first screening cylinder 3 and the second screening cylinder 4 are different, the particles pushed out from different sub-screens 6 can be discharged in different directions. With the cooperation of the material guide port 14 and the material guide pipe 15, they can be distinguished and collected to achieve different screening effects.

In one embodiment, for the above-mentioned driving mechanism 8, the driving mechanism 8 includes a driving motor 801, the driving motor 801 is fixed to the top of the top cover 7, and the output end of the driving motor 801 is provided with a driving shaft 802, and the output end of the driving shaft 802 is threadedly connected to the first pushing screen assembly 9.

By starting the driving motor 801, the driving shaft 802 is operated at high speed to drive the first push screen assembly 9 to operate, and then the first push screen assembly 9 drives the second push screen assembly 10 to operate, so that it drives the soil conditioner particles on the upper surface of the sub-screen 6 to move.

By threading the first push screen assembly 9 and the drive shaft 802, the first push screen assembly 9 can be rotatably fixed at the bottom of the drive shaft 802, so that the first push screen assembly 9 and the second push screen assembly 10 can be flexibly installed and disassembled. When the first push screen assembly 9 and the second push screen assembly 10 are driven to operate, particles with larger particle sizes are blocked by the first push screen assembly 9 and the second push screen assembly 10 and pushed to the discharge slot 13, thereby increasing the flow rate of the particles after screening.

In one embodiment, for the above-mentioned first screen pushing assembly 9, the first screen pushing assembly 9 includes a threaded sleeve 901, the threaded sleeve 901 is threadedly connected to the output end of the driving shaft 802, and a screen pushing plate 902 is fixedly installed on the outer surface of the threaded sleeve 901.

By rotating and locking the threaded sleeve 901 on the output end of the driving shaft 802, when the driving shaft 802 rotates, the threaded sleeve 901 is driven to rotate, and the threaded sleeve 901 drives the push screen plate 902 to rotate, so that the larger particles blocked on the sub-screen 6 are pushed to the outer edge, and the particles smaller than the gap on the inner wall of the push screen plate 902 pass through the gap and are screened and fall into the inside of the second screening cylinder 4 accompanied by the vibration of the sub-screen 6.

By threading the threaded sleeve 901 and the bottom of the driving shaft 802, the threaded sleeve 901 passes through the center of the sub-screen 6, and the push screen plates 902 are located on both sides of the center of the sub-screen 6 and move in a circular motion to cooperate with the vibration screening action of the sub-screen 6, so that the screened particles quickly fall into the secondary sub-screen 6. In this way, when the first screening cylinder 3 and the second screening cylinder 4 are disassembled and separated, the threaded sleeve 901 can be rotated and disassembled with the driving shaft 802, making it more flexible to replace and use.

In one embodiment, for the above-mentioned second push-screen assembly 10, the second push-screen assembly 10 includes a connecting shaft 101, the connecting shaft 101 is threadedly connected to the inside of the threaded rotating sleeve 901, the outer surface of the connecting shaft 101 is fixedly connected to a fixed rotating sleeve 102, and the outer surface of the fixed rotating sleeve 102 is fixedly connected to a second push-screen plate 103.

By connecting the rotating shaft 101 with the threaded rotating sleeve 901, the driving shaft 802 can drive the push screen plate 902 and the second push screen plate 103 to operate simultaneously, so that they have the same operating frequency, so that the discharge efficiency of the soil conditioner particles remains the same when they undergo secondary screening, thereby improving the quality of the screening operation.

In one embodiment, for the fixed rotating sleeve 102 , the internal thread of the fixed rotating sleeve 102 is connected with a bottom rotating shaft 16 , a push plate 17 is fixedly mounted on the outer surface of the bottom rotating shaft 16 , and a discharge hopper 18 is provided on the outer surface of the third screening cylinder 5 .

After the bottom rotating shaft 16 is threadedly connected to the fixed rotating sleeve 102 , the push plate 17 is driven and simultaneously rotates at a high speed inside the third screening drum 5 , so that the particles that fall into the third screening drum 5 after being screened from the second screening drum 4 are pushed by the push plate 17 and quickly discharged from the inside of the discharge hopper 18 .

In one embodiment, for the above-mentioned support base 1, a support column 19 is fixedly installed at the bottom of the support base 1, and the number of the support columns 19 is several.

The multiple groups of support columns 19 can provide a balanced bottom support at the bottom of the support base 1, so that the bottom support of the top is relatively stable when the screening operation is performed.

In one embodiment, for the third screening cylinder 5 , both sides of the sub-screen 6 are fixedly connected with inner clamping blocks 21 , and the inner walls of the first screening cylinder 3 and the second screening cylinder 4 are both provided with clamping grooves.

The inner clamping blocks 21 are located on both sides of the sub-screen 6. The inner clamping blocks 21 cooperate with the clamping grooves to facilitate the disassembly and installation of the sub-screen 6, which is beneficial for cleaning and replacement.

Through the above technical solution, 1. by arranging the vibration component 2 inside the support seat 1, and connecting the vibration component 2 with the bottom of the third screening cylinder 5, so that it drives the first screening cylinder 3 and the second screening cylinder 4 to vibrate, when the soil conditioner particles enter the first screening cylinder 3, the driving mechanism 8 cooperates with the first push screen component 9 to push the larger particles blocked on the sub-screen 6 out of the first screening cylinder 3, and the particles accumulated on the sub-screen 6 are quickly vibrated and screened along with the vibration of the sub-screen 6, so that the second push screen component 10 inside the second screening cylinder 4 generates a push screen at the same time as the sub-screen 6 inside it vibrates. The screening action causes the particles blocked by the secondary screening to be pushed out of the second screening cylinder 4, and the screening mesh 6 has a certain elasticity, so that the soil conditioner particles are in elastic contact with the screening mesh 6, so that they can avoid accidental rupture caused by collision and squeezing during screening, and improve the powder screening operation efficiency; 2. By connecting the connecting shaft 101 with the threaded rotating sleeve 901, the driving shaft 802 can simultaneously drive the push screen plate 902 and the second push screen plate 103 to operate at the same time, so that they have the same operating frequency, so that the discharge efficiency of the soil conditioner particles remains the same when they pass through the secondary screening, thereby improving the screening operation quality.

In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims (10)

1. A screening mechanism for producing a soil conditioner, comprising a support seat (1), characterized in that: a vibration assembly (2) is arranged inside the support seat (1), a first screening cylinder (3) is arranged on the top of the support seat (1), a second screening cylinder (4) is fixedly mounted on the bottom of the first screening cylinder (3), a third screening cylinder (5) is fixedly mounted on the bottom of the second screening cylinder (4), a sub-screening net (6) is clamped on the inner walls of the first screening cylinder (3) and the second screening cylinder (4), a top cover (7) is arranged on the top of the first screening cylinder (3), a driving mechanism (8) is arranged on the top of the top cover (7), a first screen pushing assembly (9) is threadedly connected to the output end of the driving mechanism (8), a second screen pushing assembly (10) is threadedly connected to the bottom of the first screen pushing assembly (9), the top of the vibration assembly (2) is fixedly connected to the bottom of the third screening cylinder (5), and a feed hopper (20) is fixedly mounted on the top of the top cover (7). 2. A screening mechanism for producing soil conditioners according to claim 1, characterized in that the vibration component (2) comprises a vibration motor (201), an output shaft (202) is provided at the top of the vibration motor (201), and the vibration motor (201) is located inside the support base (1). 3. A screening mechanism for producing soil conditioners according to claim 2, characterized in that a cross support seat (11) is arranged inside the support seat (1), a vibration spring (12) is fixedly installed on the top of the support seat (1), the top of the vibration spring (12) is fixedly connected to the bottom of the third screening cylinder (5), and there are several vibration springs (12). 4. A screening mechanism for producing soil conditioners according to claim 1, characterized in that a discharge slot (13) is provided on one side of the sub-screen (6), and a material guide port (14) corresponding to the discharge slot (13) is provided on the outer surfaces of the first screening cylinder (3) and the second screening cylinder (4), and a material guide pipe (15) is fixedly connected to the outer surfaces of the first screening cylinder (3) and the second screening cylinder (4), and the material guide pipe (15) is communicated with the interior of the material guide port (14). 5. A screening mechanism for producing soil conditioners according to claim 1, characterized in that the driving mechanism (8) comprises a driving motor (801), the driving motor (801) is fixed to the top of the top cover (7), and a driving shaft (802) is provided at the output end of the driving motor (801), and the output end of the driving shaft (802) is threadedly connected to the first screen pushing assembly (9). 6. A screening mechanism for producing soil conditioners according to claim 5, characterized in that the first screen pusher assembly (9) comprises a threaded sleeve (901), the threaded sleeve (901) is threadedly connected to the output end of the drive shaft (802), and a screen pusher plate (902) is fixedly mounted on the outer surface of the threaded sleeve (901). 7. A screening mechanism for producing soil conditioners according to claim 6, characterized in that the second screen push assembly (10) comprises a connecting shaft (101), the connecting shaft (101) is threadedly connected to the inside of a threaded rotating sleeve (901), the outer surface of the connecting shaft (101) is fixedly connected to a fixed rotating sleeve (102), and the outer surface of the fixed rotating sleeve (102) is fixedly connected to a second screen push plate (103). 8. A screening mechanism for producing soil conditioners according to claim 7, characterized in that the internal thread of the fixed rotating sleeve (102) is connected to a bottom rotating shaft (16), a push plate (17) is fixedly mounted on the outer surface of the bottom rotating shaft (16), and a discharge hopper (18) is provided on the outer surface of the third screening cylinder (5). 9. A screening mechanism for producing soil conditioners according to claim 1, characterized in that a support column (19) is fixedly mounted on the bottom of the support seat (1), and the number of the support columns (19) is several. 10. A screening mechanism for producing soil conditioners according to claim 2, characterized in that inner clamping blocks (21) are fixedly connected to both side surfaces of the sub-screen (6), and clamping grooves are provided on the inner walls of the first screening cylinder (3) and the second screening cylinder (4).