CN115138260A

CN115138260A - Particle material stirring equipment and stirring method

Info

Publication number: CN115138260A
Application number: CN202210491597.9A
Authority: CN
Inventors: 张炳超; 张子军; 黄红英; 陈莹莹; 曾庆东; 陈朝旭; 杨昂超; 欧明; 韦建吉; 凌庆成; 董晓庆; 张文学
Original assignee: Guangdong Modern Agricultural Equipment Research Institute
Current assignee: Guangdong Modern Agricultural Equipment Research Institute
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-10-04

Abstract

The application discloses granule material agitated vessel and stirring method relates to granule material agitated vessel technical field, and this granule material agitated vessel includes: the cylinder is provided with a feeding end and a discharging end and is provided with a cavity, the cavity is positioned between the feeding end and the discharging end, and the discharging end of the cylinder is conical; the driving assembly is used for driving the cylinder to rotate; the stirring device comprises a plurality of shoveling plates, the shoveling plates are arranged on the inner wall of the cylinder at intervals, and at least one spiral surface is fitted on the surfaces of the shoveling plates. When the granular fertilizer is stirred, the barrel is driven to rotate, and the shoveling plate rotates along with the barrel; under the drive of the shoveling plates, after the granulated fertilizer is lifted to a certain height, one part of the granulated fertilizer in the higher shoveling plates descends due to self gravity, the other part of the granulated fertilizer slides to the adjacent lower shoveling plates along the shoveling plates, and the circulation is repeated in such a way, so that the granulated fertilizer is stirred and scattered, and the heat dissipation efficiency is improved.

Description

Particle material stirring equipment and stirring method

Technical Field

The application relates to the technical field of particle material stirring equipment, in particular to particle material stirring equipment and a stirring method.

Background

A rotary cooler is a functional device commonly used for stirring and cooling fertilizers on the market, and a stirring cylinder body of the rotary cooler is installed in a mode of inclining for a certain angle. After the dried granular fertilizer enters the cooler from the feeding hole, the granular fertilizer is continuously stirred along with the rotation of the stirring cylinder; meanwhile, under the action of gravity, the granular fertilizer moves along the direction of the discharge port which is inclined downwards. However, the design length of the stirring cylinder body is generally more than 20 meters, and the stirring cylinder body is usually used for medium and large fertilizer processing plants and is not suitable for small processing fields with limited space positions.

According to the existing fluidized bed cooler, the granular fertilizer is placed on a porous sieve plate according to the fluidization principle, and the air from the lower part of the porous sieve plate blows the granular fertilizer and the air to form convective motion, so that the granular fertilizer and the air can perform sufficient heat exchange, and the cooling purpose is achieved. But the multilayer granules laid on the sieve plate are more agglomerated after being cooled, and certain influence is caused on subsequent finished product packaging.

A rotating shaft is arranged in a plurality of stirring devices at home and abroad, a material copying plate is fixed on the rotating shaft, and the rotating material copying plate performs the actions of forced extrusion, rolling, shearing, throwing and the like on materials so as to ensure that the materials are uniformly stirred in violent movement. Although the forced stirring quality is higher, the crushing of the particles is easily caused by the extrusion of the materials in the stirring process of the granulated fertilizer, and the forced stirring is not suitable for the stirring of the granulated fertilizer.

Disclosure of Invention

The present application is directed to solving at least one of the problems in the prior art. For this, this application provides a granule material agitated vessel, can realize granular fertilizer's stirring and break up the function, satisfies the small-size processing field of granular fertilizer and dispels the heat cooling and stir the demand of breaking up to granular fertilizer.

The application also provides a stirring method of the granular materials.

According to this application embodiment's granule material agitated vessel includes: a barrel having a feed end and a discharge end, the barrel having a cavity located between the feed end and the discharge end, the discharge end of the barrel being tapered; the driving assembly is used for driving the cylinder to rotate; the stirring device comprises a plurality of material copying plates, the material copying plates are arranged on the inner wall of the cylinder at intervals, the included angle between each material copying plate and the radial plane of the cylinder is theta, and at least one spiral surface is fitted on the surfaces of the material copying plates along the axial direction of the cylinder.

According to some embodiments of the application, a plurality of the shoveling plates are arranged in each radial plane of the cylinder at intervals, the number of the shoveling plates is n, and the following conditions are satisfied: n is theta is more than or equal to 360 degrees.

According to some embodiments of the application, the θ is 45 °.

According to some embodiments of the application, a projection of the shoveling plates in a vertical direction is at least partially located on another adjacent shoveling plate.

According to some embodiments of the present application, the material copying plates in the same radial plane of the cylinder are marked as a group, and 5 groups of the material copying plates are arranged in the cylinder along the axial direction of the cylinder.

According to some embodiments of the application, the width of the flitch is 250mm.

According to some embodiments of the application, the device further comprises a discharging device arranged at the discharging end, the discharging device comprises discharging plates, the discharging plates are obliquely arranged at the discharging end, the number of the discharging plates is m, and m is larger than or equal to 2.

According to some embodiments of the present application, the m is 3,3 of the discharge plates defining a discharge channel out of the discharge end.

According to some embodiments of the application, drive assembly includes first gear circle, driving gear and drive arrangement, first gear circle cover is located the periphery of barrel, drive arrangement's output with the driving gear connection, the driving gear with first gear circle meshing.

According to some embodiments of the application, the barrel has an aspect ratio of 1.1 to 1.3.

According to the embodiment of this application on the one hand, drive assembly includes first gear circle, driving gear and drive arrangement, first gear circle cover is located the periphery of barrel, drive arrangement's output with the driving gear connection, the driving gear with first gear circle meshing.

According to another aspect of the present application, the method for stirring granular fertilizer, which uses the above granular material stirring apparatus, further includes the following steps: conveying granular fertilizer from the feed end of the barrel to the chamber; when the granular fertilizer is stirred, the barrel is rotated in the anticlockwise direction, wherein the anticlockwise direction refers to the rotating direction of the barrel when the discharge end of the barrel points to the feed end; and after stirring, enabling the cylinder to rotate clockwise.

According to this application embodiment's granule material agitated vessel, have following beneficial effect at least: after fertilizer particles enter the cavity, the fertilizer particles are accumulated at the bottom of the cavity due to gravity, and the cylinder rotates and drives the material copying plate to rotate. When the granular fertilizer is stirred, the driving assembly is utilized to drive the barrel to rotate, and the shoveling plate rotates along with the barrel; under the drive of the shoveling plates, after the granulated fertilizer is lifted to a certain height, one part of the granulated fertilizer in the higher shoveling plates descends due to self gravity, the other part of the granulated fertilizer slides to the adjacent lower shoveling plates along the shoveling plates, and the circulation is repeated in such a way, so that the granulated fertilizer is stirred and scattered, and the heat dissipation efficiency is improved. Because polylith copying board in the cavity can fit out 1 at least helicoid, when realizing stirring granular fertilizer, can also drive the granular fertilizer in the cavity and remove in the cavity. When the granular fertilizer in the cavity is stirred for heat dissipation, the cylinder is driven to rotate positively, so that the granular fertilizer moves towards the feeding end. After the cooling of granular fertilizer finishes, drive assembly drive barrel reversal for the granular fertilizer in the cavity removes and discharges the cavity to the discharge end of barrel.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The present application is further described with reference to the following figures and examples, in which:

FIG. 1 is a schematic overall structure diagram of a particulate material stirring apparatus according to an embodiment of the present application;

FIG. 2 is a schematic front structural view of a granular material stirring device according to an embodiment of the present application;

FIG. 3 is a schematic right-view structural diagram of a granular material stirring device according to an embodiment of the present application;

FIG. 4 is a schematic illustration in partial cross-section of a particulate material mixing apparatus in accordance with an embodiment of the present application;

FIG. 5 is a schematic perspective view of a barrel in a particulate material mixing apparatus according to an embodiment of the present application;

FIG. 6 isbase:Sub>A schematic cross-sectional view A-A of FIG. 5;

fig. 7 is a schematic view of partial installation of a cylinder, a material copying plate and a material discharging plate in the particulate material stirring apparatus according to the embodiment of the present application;

fig. 8 is a schematic view illustrating installation of a material copying plate and a discharge end of a cylinder in the particulate material stirring apparatus according to the embodiment of the present application;

fig. 9 is a schematic view illustrating an installation of a material copying plate and a discharge end of a cylinder in the particulate material stirring apparatus according to the embodiment of the present application;

fig. 10 is a schematic layout of a shoveling plate in the particulate material stirring apparatus according to the embodiment of the present application.

Reference numerals:

10. a barrel; 11. a feeding end; 12. a discharge end; 14. a taper shape; 100. a chamber;

21. a first gear ring; 22. a driving gear; 23. a drive device; 24. supporting the rollers; 25. a base; 26. supporting the rolling ring;

31. a material copying plate;

41. and a discharging plate.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the positional descriptions, such as the directions of up, down, front, rear, left, right, etc., referred to herein are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present application.

In the description of the present application, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present number, and the above, below, within, etc. are understood as including the present number. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.

In the description of the present application, unless otherwise expressly limited, terms such as set, mounted, connected and the like should be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present application by combining the detailed contents of the technical solutions.

In the description of the present application, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Referring to fig. 1 to 10, the embodiment of the present application discloses a particulate material stirring apparatus, which includes a cylinder 10, a driving assembly, and a stirring device.

In some embodiments of the present application, referring to fig. 1 to 3, the particulate material stirring apparatus further includes a base 25, the barrel 10 is horizontally disposed on the base 25, and the barrel 10 is cylindrical as a whole, in other words, the rotation axis of the barrel 10 coincides with the horizontal plane. Wherein, the cylinder 10 has a feeding end 11 and a discharging end 12, the feeding end 11 of the cylinder 10 is planar, and the discharging end 12 of the cylinder 10 is conical 14. The barrel 10 also has a chamber 100, the chamber 100 being located between the feed end 11 and the discharge end 12, the chamber 100 serving as a location for agitation and heat dissipation of the granulated fertilizer. In the present embodiment, the aspect ratio of the cylinder 10 is 1.1 to 1.3, wherein the width of the cylinder 10 refers to the diameter of the cylinder 10. Barrel 10 level sets up, can effectively avoid the granular fertilizer in the barrel 10 to pile up the lower one side of height in cavity 100 when barrel 10 rotates to make granular fertilizer can evenly stir in barrel 10, and then promote the stirring radiating efficiency.

In some embodiments of the present application, a drive assembly is used to drive the barrel 10 in rotation. Specifically, please refer to fig. 1 to fig. 3, the driving assembly includes a first gear ring 21, a driving gear 22 and a driving device 23, the first gear ring 21 is sleeved on the outer periphery of the cylinder 10, the driving device 23 is disposed on one side of the cylinder 10, the driving gear 22 is connected to an output end of the driving device 23, and the driving gear 22 is engaged with the first gear ring 21. The driving device 23 can drive the barrel 10 to rotate, so that the granulated fertilizer is stirred and scattered in the chamber 100 or the granulated fertilizer in the chamber 100 is led out of the drying chamber.

In this embodiment, referring to fig. 2 and 3, the drive assembly further includes a support roller ring 26 and a support roller 24. The middle part with barrel 10 is established to first gear circle 21 cover, and the both ends of barrel 10 all overlap and are equipped with and support and roll circle 26, and the position that corresponds with supporting to roll circle 26 on base 25 is provided with support roller 24, support roller 24 and support and roll circle 26 sliding fit.

In some embodiments of the present application, referring to fig. 4 to fig. 6, the stirring device includes a plurality of material copying plates 31, and the material copying plates 31 have a plurality of material copying plates 31 spaced apart from each other and disposed on the inner wall of the cylinder 10. Wherein, the included angle between each material copying plate 31 and the radial plane of the cylinder 10 is theta, the material copying plate 31 inclines from the discharge end 12 to the feed end 11, and at least one helical surface is fitted on the surfaces of the material copying plates 31 along the axial direction of the cylinder 10. The material copying plate 31 is fixed on the inner surface of the barrel 10 according to a certain angle theta, and when the barrel 10 rotates, the granulated fertilizer can move along the axial direction of the barrel 10 in the chamber 100.

In some embodiments of the present application, the apparatus for stirring particulate material further comprises a discharging device disposed at the discharging end 12 of the cylinder 10. In the present embodiment, referring to fig. 4, the discharging device includes a discharging plate 41, the discharging plate 41 is located at one end of the cone 14 of the barrel 10, and the discharging plate 41 is obliquely disposed at the discharging end 12 of the barrel 10. When the shoveling plate 31 close to one side of the discharge plate 41 drives the granulated fertilizer in the chamber 100 to rise, a part of the granulated fertilizer on the shoveling plate 31 slides down to the discharge plate 41 along the shoveling plate 31, and is discharged out of the barrel 10.

In the embodiment of the present application, a plurality of shoveling plates 31 are disposed in a chamber 100 in the barrel 10, and at least one helicoid is fitted in the chamber 100 by the plurality of shoveling plates 31. After fertilizer particles enter the chamber 100, the fertilizer particles are accumulated at the bottom of the chamber 100 due to gravity, and the cylinder 10 rotates and drives the shoveling plate 31 to rotate. When the granulated fertilizer is stirred, the driving assembly is utilized to drive the cylinder 10 to rotate, and the material copying plate 31 rotates along with the cylinder 10; under the drive of the shoveling plates 31, after the granulated fertilizer is lifted to a certain height, one part of granulated fertilizer in the higher shoveling plates 31 descends due to self gravity, the other part of granulated fertilizer slides to the adjacent lower shoveling plates 31 along the shoveling plates 31, and the circulation is repeated in such a way, so that the granulated fertilizer is stirred and scattered, the contact area between the granulated fertilizer and the air is increased, and the heat dissipation efficiency is improved.

Because the polylith flitch 31 in the cavity 100 can fit out 1 at least helicoid, consequently, the granular material agitated vessel of this application embodiment can also drive the granular fertilizer in the cavity 100 and remove in the cavity 100 when realizing the stirring to granular fertilizer.

When the granular fertilizer in the cavity 100 is stirred and radiated, the cylinder 10 is driven to rotate forward, so that the granular fertilizer moves towards the feeding end 11. After the granulated fertilizer is cooled, the driving assembly drives the barrel 10 to rotate reversely, so that the granulated fertilizer in the cavity 100 moves towards the discharge end 12 of the barrel 10 and is discharged out of the cavity 100 under the action of the discharge plate 41.

It should be noted that "forward rotation" referred to in this application indicates that: from the feed end 11 of the barrel 10 to the discharge end 12, the barrel 10 rotates clockwise, otherwise it reverses.

In some embodiments of the present application, a plurality of shoveling plates 31 are arranged at intervals in each radial plane of the cylinder 10, the number of the shoveling plates 31 is n, and the range of the included angle θ between each shoveling plate 31 and the radial plane of the cylinder 10 is 0 to 90 °. When the value of theta is small, the granular fertilizer is stirred by the material copying plate 31, but the granular material moves less along the axial direction of the cylinder 10; when the value of theta is gradually increased, the movement of the granular fertilizer in the axial direction of the barrel 10 is firstly enhanced and then weakened, but in the process, the stirring effect of the material copying plate 31 on the granular materials is gradually lowered. Since the material copying plates 31 in the cylinder 10 can be approximately fitted with at least one spiral surface along the axial direction of the cylinder 10, the material copying plates 31 can be considered to be circumferentially distributed and axially arranged along the inner wall of the cylinder 10. In order to make the granular material move along the axial direction of the cylinder 10 when the cylinder 10 rotates, the distance of the granular material moving along the axial direction of the cylinder 10 is greater than or equal to the axial distance of 2 material shoveling plates 31 in the axial direction every 0.5 rotation of the cylinder 10. Therefore, the number and the included angle of the material copying plates 31 need to satisfy: n theta is more than or equal to 360 degrees to ensure the moving efficiency of the granular fertilizer in the chamber 100, thereby ensuring the discharging speed.

In this embodiment, an included angle θ between the material copying plate 31 and the radial plane of the cylinder 10 is 45 °, so that the granulated fertilizer after being cooled can be completely discharged out of the chamber 100 in a time as short as possible while the stirring, cooling and heat dissipation effects of the granulated fertilizer in the chamber 100 are effectively ensured.

In order to effectively ensure the flowability of the granulated fertilizer in the chamber 100, the shoveling plates 31 in adjacent radial planes on the same spiral line should have a certain overlap. Therefore, the projection of the material shoveling plate 31 along the radial direction of the cylinder 10 is at least partially positioned on another adjacent material shoveling plate 31, so as to improve the stirring effect and the discharging efficiency of the granular fertilizer in the chamber 100 as much as possible.

In this embodiment, referring to fig. 5 and 6, the material-copying plates 31 in the same radial plane of the cylinder 10 are a group, and 5 groups of material-copying plates 31 are arranged in the chamber 100 along the axial direction of the cylinder 10, where n has a value of 8.

According to experimental analysis, the larger the area of the material copying plate 31 is, the more the circulation times of the granulated fertilizer in the chamber 100 are, and the better the stirring and cooling effects are. In some embodiments, the width of the sheet 31 is selected to be 250mm.

As an example, the length of the cylinder 10 is 2300mm, the diameter is 1800mm, the width of the material copying plate 31 is 250mm, 5 sets of material copying plates 31 are arranged on the inner wall of the cylinder 10 at intervals along the axial direction of the cylinder 10, 8 material copying plates 31 are arranged on each set of material copying plates 31 at even intervals, and the included angle between each material copying plate 31 and the radial plane of the cylinder 10 is 45 °.

It should be understood that the width of the sweep plate 31 refers to the length of the side of the sweep plate 31 having one end connected to the inner wall of the cylinder 10.

In some embodiments of the present application, this granular material mixing equipment includes ejection of compact board 41, and ejection of compact board 41 becomes certain angle with the horizontal plane and installs in the discharge end 12 of barrel 10, and ejection of compact board 41 forms the inclined plane of slope in barrel 10, can make things convenient for the granular fertilizer in the cavity 100 to discharge outside barrel 10 under the combined action of material copying board 31 and ejection of compact board 41 to carry out granular fertilizer's packing work. Wherein the number of the discharging plates 41 is m, m is more than or equal to 2, and m is an integer. Through experiments, it is known that the number of the discharging plates 41 can affect the discharging speed of the cylinder 10 and the discharging quality.

Experimental analysis shows that when m is 2 and 3 respectively, that is, the number of the discharge plates 41 is 2 and 3 respectively, and the number of the discharge plates 41 is 2, the discharge amount of a single discharge plate 41 is larger, but the total discharge amount when the number of the discharge plates 41 is 2 is smaller than that when the number of the discharge plates 41 is 3; when m is equal to 4, the two discharging plates 41 discharge simultaneously, so that the granular materials may jump in different directions in the discharging process, and the granular fertilizer is easily thrown to the outside.

Therefore, in some embodiments of the present application, please refer to fig. 6 to 10, the number m of the discharging plates 41 is selected to be 3,3, and the discharging plates 41 are uniformly installed at the discharging end 12 of the barrel 10. Specifically, each discharging plate 41 is respectively connected with the inner wall of the discharging end 12 of the cylinder 10, the installation angles and directions of the three discharging plates 41 and the discharging end 12 are the same, and the three discharging plates 41 are uniformly arranged at the discharging end 12 of the cylinder 10. As can be seen from fig. 8 and 9, any two discharge plates 41 are not connected to each other. When the particle materials in the cylinder 10 need to be discharged out of the cylinder 10, the material copying plate 31 lifts the particle materials to a certain height, meanwhile, the particle materials flow onto the discharging plate along the material copying plate 31, and then the particle materials are discharged from the discharging end 12 along the discharging plate 41. Three discharge plates 41 are arranged, so that the granular fertilizer can be effectively prevented from being thrown to the outside during discharging on the premise of improving the discharging efficiency of the barrel 10.

In some other embodiments, discharging device can also be set up to screw mechanism, and this screw mechanism includes feeding pipe and spiral feeding axle, and feeding pipe has feed inlet and discharge gate, and feeding pipe is used for transmitting the material, and the spiral feeding axle sets up in feeding pipe, and the spiral feeding axle has the helicoid, can make the material in feeding pipe move along feeding pipe through rotating this spiral feeding axle to realize material transport.

It will be appreciated that the above described granular material mixing apparatus may also be used for mixing other granular materials and is not limited to granular fertilisers.

The embodiment of the other aspect of the application also discloses a stirring method of the granular fertilizer, which applies the granular material stirring equipment and further comprises the following steps: delivering granular fertilizer from the feed end 12 of the barrel 10 to the chamber 100; when the granulated fertilizer is stirred, the barrel 10 rotates anticlockwise, and the shovelling plate 31 stirs the granulated fertilizer, wherein the anticlockwise refers to the rotation direction of the barrel 10 when the discharge end of the barrel points to the feed end; after the stirring is finished, the barrel 10 is rotated clockwise, and the granulated fertilizer is discharged from the chamber 100 to the outside of the barrel 10.

The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present application. Furthermore, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

Claims

1. A particulate material mixing apparatus, comprising:

a barrel having a feed end and a discharge end, the barrel having a cavity located between the feed end and the discharge end, the discharge end of the barrel being tapered;

the driving assembly is used for driving the cylinder to rotate;

the stirring device comprises a plurality of material copying plates, the material copying plates are arranged on the inner wall of the cylinder at intervals, the included angle between each material copying plate and the radial plane of the cylinder is theta, and at least one spiral surface is fitted on the surfaces of the material copying plates along the axial direction of the cylinder.

2. The granular material stirring device according to claim 1, wherein a plurality of shoveling plates are arranged in each radial plane of the cylinder at intervals, and the number of the shoveling plates is n, so that the following conditions are satisfied: n is theta is more than or equal to 360 degrees.

3. The particulate material mixing apparatus of claim 2, wherein θ is 45 °.

4. The particulate material mixing apparatus of any one of claims 2 or 3, wherein a projection of the shoveling plates in a vertical direction is at least partially located on another adjacent shoveling plate.

5. The granular material stirring apparatus as claimed in claim 4, wherein the shoveling plates in the same radial plane of the cylinder are marked as one group, and 5 groups of the shoveling plates are provided in the cylinder in the axial direction of the cylinder.

6. The particulate material mixing apparatus of claim 5, wherein the width of the shoveling plates is 250mm.

7. The granular material stirring equipment as claimed in claim 1, further comprising a discharging device arranged at the discharging end, wherein the discharging device comprises discharging plates, the discharging plates are obliquely arranged at the discharging end, the number of the discharging plates is m, and m is more than or equal to 2.

8. The particulate material mixing apparatus of claim 7, wherein the m is 3,3 of the discharge plates defining a discharge channel out of the discharge end.

9. The granular material stirring apparatus as claimed in claim 1, wherein the driving assembly comprises a first gear ring, a driving gear and a driving device, the first gear ring is sleeved on the outer periphery of the cylinder, an output end of the driving device is connected with the driving gear, and the driving gear is engaged with the first gear ring.

10. A method of agitating a granular fertilizer using the granular material agitating apparatus of any one of claims 1 to 9, further comprising the steps of:

conveying granular fertilizer from the feed end of the barrel to the chamber;

when the granular fertilizer is stirred, the barrel is rotated in the anticlockwise direction, wherein the anticlockwise direction refers to the rotating direction of the barrel when the discharge end of the barrel points to the feed end;

and after stirring, enabling the cylinder to rotate clockwise.