An organic fertilizer mixing equipment with gradable stirring for compound fertilizer production

Abstract

The present invention relates to an organic fertilizer mixing device with hierarchical stirring for compound fertilizer production, belonging to the technical field of stirring and mixing devices, and comprising a mixing barrel and a barrel cover which are connected to each other. It further includes a stirring shaft, a stirring motor and stirring blades. The stirring shaft is rotatably connected to the barrel cover; the stirring motor is connected to the barrel cover, and the stirring motor is in transmission connection with the stirring shaft; a plurality of stirring blades are in magnetic transmission connection with the stirring shaft, and the plurality of stirring blades are arranged at intervals along the stirring shaft, and different stirring blades have different rotation speeds. It can solve the technical problem in the prior art that the hierarchical stirring mechanisms are coaxially fixedly installed, resulting in that the stirring mechanisms of different levels cannot simultaneously obtain appropriate working speeds, and thus it is difficult to continuously feed materials for stirring and mixing.

Description

Technical Field

[0001] The present invention belongs to the technical field of stirring and mixing equipment, and particularly relates to an organic fertilizer mixing equipment with hierarchical stirring for compound fertilizer production. Background Art

[0002] Compound organic fertilizers, especially tobacco waste organic fertilizers, are mainly made from tobacco processing waste (such as tobacco dust, tobacco stems, tobacco branches, etc.), combined with other organic materials (such as livestock and poultry manure, crop straw, etc.). After being fully stirred and mixed, they are made into organic fertilizers through composting and fermentation. However, tobacco dust contains rich plant fibers, and these fibers have a certain degree of flexibility and interlacing. During the mixing process, the fibers are prone to winding around each other, gathering the surrounding tobacco dust particles together to form aggregates. Therefore, a hierarchical stirring method is required to achieve high-speed dispersion, medium-speed mixing, and low-speed anti-sticking of the raw materials to the bottom.

[0003] A patent with the publication number CN218166599U discloses a hierarchical stirring type reactor stirrer for chemical machinery, including a mounting plate. The surface of the mounting plate is rotatably connected to a main shaft rod through a bearing. The upper surface of the mounting plate is welded with a mounting frame, and the upper surface of the mounting frame is fixedly connected with a servo motor for driving the main shaft rod to rotate. A hierarchical stirring mechanism is arranged on the surface of the main shaft rod. The hierarchical stirring mechanism includes auxiliary stirring blades fixedly installed on the surface of the main shaft rod, and a support rod is fixedly connected to the surface of the main shaft rod.

[0004] The existing technology has the following problems:

[0005] The servo motor drives the hierarchical stirring mechanism through the main shaft. However, since the hierarchical stirring mechanism is fixedly installed coaxially, when the rotational speed of the servo motor is constant, the stirring mechanisms at different levels cannot simultaneously obtain appropriate working rotational speeds. Therefore, it is difficult to continuously feed materials for stirring and mixing. Summary of the Invention

[0006] The present invention provides an organic fertilizer mixing equipment with hierarchical stirring for compound fertilizer production, which can solve the technical problem in the existing technology that the hierarchical stirring mechanisms are fixedly installed coaxially, resulting in the inability of the stirring mechanisms at different levels to simultaneously obtain appropriate working rotational speeds, and thus making it difficult to continuously feed materials for stirring and mixing.

[0007] To achieve the above object, the present invention is realized through the following technical solutions:

[0008] The present application provides an organic fertilizer mixing device for compound fertilizer production that can perform hierarchical stirring, including a mixing barrel and a barrel cover connected to each other. It further includes a stirring shaft, a stirring motor, and stirring blades. The stirring shaft is rotatably connected to the barrel cover; the stirring motor is connected to the barrel cover, and the stirring motor is in transmission connection with the stirring shaft; a plurality of stirring blades are magnetically driven and connected to the stirring shaft, and the plurality of stirring blades are arranged at intervals along the stirring shaft, and different stirring blades have different rotation speeds.

[0009] Through the above technical solution, by adopting the magnetic drive method, the magnetic field intensity between different stirring blades and the stirring shaft can be set, so that different stirring blades can have different working rotation speeds when the rotation speed of the stirring shaft is the same, thereby realizing continuous hierarchical stirring.

[0010] In the present invention, the above mixing device further includes electromagnets and permanent magnets. A plurality of electromagnets are arranged in a ring outside the stirring shaft; a plurality of permanent magnets are arranged in a ring inside the stirring blades;

[0011] The above electromagnets and the permanent magnets are magnetically coupled.

[0012] Through the above technical solution, by arranging the electromagnets on the stirring shaft, the magnetic field intensity of the electromagnets can be adjusted by setting a circuit on the stirring shaft, which improves the adjustable parameters of the stirring device.

[0013] In the present invention, the above mixing device further includes: a power supply unit and a slip ring. The power supply unit is connected to the barrel cover, and the power supply unit is arranged in a ring outside the stirring shaft; the slip ring is connected to the stirring shaft, and the slip ring is electrically connected to the electromagnets, and the slip ring is in sliding contact with the power supply unit;

[0014] A plurality of electromagnets are grouped and connected in series, and the power supply unit controls different stirring blades to obtain different rotation speeds by independently controlling each group of series-connected electromagnets.

[0015] Through the above technical solution, by adopting the power supply unit to perform sliding power supply through the slip ring and controlling the electromagnets in groups at the same time, it is convenient to adjust the number of working electromagnets, thereby changing the magnetic field intensity, which is more suitable for the mixing use of temperature-sensitive raw materials and the mixing scenarios with a large rotational speed difference.

[0016] In the present invention, the above mixing device further includes: a heat dissipation fluid and a condensation cover. The heat dissipation fluid is filled in the stirring shaft, and the heat dissipation fluid absorbs the temperature generated by the electromagnets and evaporates; the condensation cover is connected to the top of the stirring shaft, and the evaporated heat dissipation fluid is cooled and condensed at the condensation cover.

[0017] Through the above technical solution, a heat dissipation fluid is filled in the stirring shaft, and based on the heat pipe heat dissipation principle, the heat generated by the electromagnet is cooled to reduce the influence of magnetic drive on the temperature in the stirring barrel.

[0018] In the present invention, the above-mentioned mixing device further includes: an integrated fan blade, the integrated fan blade is connected to the top of the condensation cover, the integrated fan blade rotates coaxially with the stirring shaft, and when the integrated fan blade rotates, it sucks in air to cool the condensation cover.

[0019] Through the above technical solution, the condensation cover is cooled by using the integrated fan blade rotating coaxially with the stirring shaft, reducing the setting of additional heat dissipation devices and simplifying the overall structure.

[0020] In the present invention, the above-mentioned mixing device further includes: a wire channel, several wire channels are opened inside the stirring shaft, the wire channels are used for threading the wires connecting the conductive ring and the electromagnet, and the side walls of the wire channels are in contact with the heat dissipation fluid.

[0021] Through the above technical solution, wire routing is adopted in the wire channels, and at the same time, the contact between the wire channels and the heat dissipation fluid is increased, improving the cooling effect on the wire heating. At the same time, the setting of the wire channels enhances the rigidity of the stirring shaft.

[0022] In the present invention, the above-mentioned mixing device further includes: a thrust bearing, the thrust bearing is connected between the stirring blade and the stirring shaft, and the thrust bearing is used to limit the relative positions of the stirring shaft and the stirring blade.

[0023] Through the above technical solution, the thrust bearing is used to avoid the displacement of the stirring blade caused by the non-contact drive of magnetic drive, and at the same time, it also bears the gravity of the stirring blade, improving the stability of the equipment operation.

[0024] This application has the following beneficial effects:

[0025] 1. By adopting the magnetic drive method, different working speeds of different stirring blades can be achieved by setting the magnetic field strength between the stirring blade and the stirring shaft, so that under the condition of the same rotation speed of the stirring shaft, continuous grading stirring can be realized;

[0026] 2. By arranging the electromagnet on the stirring shaft, the magnetic field strength of the electromagnet can be adjusted by setting a circuit through the stirring shaft, improving the adjustable parameters of the stirring equipment;

[0027] 3. By adopting the power supply unit to supply power slidingly through the conductive ring and controlling the electromagnets in groups at the same time, it is convenient to adjust the number of working electromagnets, thereby changing the magnetic field strength, which is more suitable for the mixing use of temperature-sensitive raw materials and the mixing scenarios with large rotational speed differences;

[0028] 4. Fill the stirring shaft with heat-dissipating fluid, and based on the heat pipe heat dissipation principle, cool down the heat generated by the electromagnet, reducing the influence of magnetic drive on the temperature inside the stirring tank;

[0029] 5. Adopt an integrated fan blade to rotate coaxially with the stirring shaft to cool down the condensation cover, reducing the setting of additional heat dissipation devices and simplifying the overall structure;

[0030] 6. Adopt wire channels for wiring, and at the same time increase the contact between the wire channels and the heat-dissipating fluid, improving the cooling effect on wire heating. At the same time, the setting of wire channels enhances the rigidity of the stirring shaft;

[0031] 7. Adopt end face bearings to avoid the displacement of the stirring blades caused by non-contact drive of magnetic drive, and at the same time bear the gravity of the stirring blades, improving the stability of equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0033] Figure 1 Isometric view of an organic fertilizer mixing equipment with gradable stirring for compound fertilizer production provided by an embodiment of the present invention;

[0034] Figure 2 Side view of an organic fertilizer mixing equipment with gradable stirring for compound fertilizer production provided by an embodiment of the present invention;

[0035] Figure 3 Is Figure 2 The sectional view taken along line A-A in

[0036] Figure 4 Is Figure 3 The partial enlarged view at B in

[0037] Figure 5 Is Figure 3 The partial enlarged view at C in

[0038] Figure 6 Is Figure 3 The partial enlarged view at D in

[0039] Figure 7 Is Figure 3 The partial enlarged view at F in

[0040] Figure 8 Is Figure 2Cross-sectional view taken along line E-E;

[0041] Figure 9 is Figure 8 partial enlarged view at position G in;

[0042] Reference numerals: 101 - mixing barrel; 102 - barrel cover; 103 - discharge port; 104 - feed port; 201 - stirring shaft; 202 - stirring motor; 203 - stirring blade; 2031 - crushing blade; 2032 - mixing blade; 2033 - anti-sticking bottom blade; 204 - electromagnet; 205 - permanent magnet; 206 - wire channel; 207 - power supply unit; 208 - slip ring; 209 - end face bearing; 301 - cooling fluid; 302 - condensation cover; 303 - integrated fan blade; 304 - groove; 401 - discharge motor; 402 - spiral shaft; 403 - discharge chute; 404 - baffle. Detailed implementation manners

[0043] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0044] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0045] The terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "plurality" is two or more.

[0046] In the description of the present application, it should be noted that, unless otherwise clearly defined and limited, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a welding, a bolt connection, or a riveting connection; it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0047] Embodiment:

[0048] Please refer to Figures 1 to 9, Figures 1 to 9 An embodiment of the present application is shown below.

[0049] This embodiment provides an organic fertilizer mixing device with hierarchical stirring for compound fertilizer production, as Figures 1 to 4 shown, which includes a mixing barrel 101 and a barrel cover 102 connected to each other, and also includes a stirring shaft 201, a stirring motor 202 and stirring blades 203. As Figure 6 shown, the stirring shaft 201 is rotatably connected to the barrel cover 102 through a bearing. As Figure 5 shown, the lower end of the stirring shaft 201 is also inserted into the pit at the bottom of the mixing barrel 101 in a transmission manner (add a bearing to reduce friction if necessary), and the rotational stability of the stirring shaft 201 is enhanced through the limitation of two limit points. As Figure 1 and Figure 3 shown, the stirring motor 202 is connected to the barrel cover 102 through a frame, and the stirring motor 202 is connected to the stirring shaft 201 through a belt drive. As Figure 3 shown, the three stirring blades 203 are magnetically driven and connected to the stirring shaft 201. From top to bottom, they are a crushing blade 2031, a mixing blade 2032 and an anti-sticking bottom blade 2033. The crushing blade 2031, the mixing blade 2032 and the anti-sticking bottom blade 2033 are arranged at intervals along the stirring shaft 201. Different stirring blades 203 have different rotational speeds. Among them, the crushing blade 2031 has a relatively high rotational speed and is mainly used to quickly disperse the agglomerated tobacco dust raw materials put in from the feed port 104. The mixing blade 2032 has a medium rotational speed and is mainly used to stir the raw materials in the mixing barrel 101. The anti-sticking bottom blade 2033 has a low rotational speed and a large torque and is mainly used to scrape up the raw materials sticking to the bottom of the mixing barrel 101.

[0050] During use, by presetting or changing the magnetic field magnitude between the crushing blade 2031, the mixing blade 2032 and the anti-sticking bottom blade 2033 and the stirring shaft 201, the three can simultaneously reach the preset working rotational speed and working torque. As Figure 3 and Figure 8 shown, a discharge port 103 is opened on the lower bottom surface of the mixing barrel 101. A baffle 404 is inserted into the discharge port 103. A discharge chute 403 is connected below the discharge port 103. A spiral shaft 402 is rotatably connected in the discharge chute 403. The spiral shaft 402 is drivingly connected to a discharge motor 401. When the raw materials are fully mixed, the baffle 404 is opened. Under the scraping action of the anti-sticking bottom blade 2033 and the action of the self-weight of the raw materials, the raw materials enter the discharge chute 403 through the discharge port 103 and are discharged from the discharge chute 403 under the rotation of the spiral shaft 402 and enter the compost fermentation of the next process. As Figure 5 shown, an annular boss is provided on the upper part of the discharge chute 403, and the baffle 404 slides on the boss.

[0051] It should be noted that the accompanying drawings of the specification are only used to illustrate the positional relationship and connection relationship of different stirring blades 203, and are not used to limit or illustrate the specific shape and size of the stirring blades 203. Exemplary mixing blades 2032 may have a larger surface area to obtain a better stirring and mixing effect, but this does not fall within the scope of improvement of this embodiment, so no detailed description and further limitation are made; compost fermentation does not fall within the scope of protection of this application, and the description here is only used to improve the function of the discharge chute 403.

[0052] Through the above technical solution, by adopting the magnetic drive method, the magnetic field strength between different stirring blades 203 and the stirring shaft 201 can be set, so that different stirring blades 203 can have different working speeds when the rotational speed of the stirring shaft 201 is the same, and thus continuous hierarchical stirring can be achieved; furthermore, because non-contact magnetic drive is adopted, the stirring motor 202 will not be overloaded due to excessive resistance of the stirring raw materials, and a safer transmission effect is achieved.

[0053] As a preferred embodiment, as Figure 4 and Figure 9 shown, the above mixing device further includes an electromagnet 204 and a permanent magnet 205. A plurality of electromagnets 204 are arranged around the outer side of the stirring shaft 201; a plurality of permanent magnets 205 are arranged around the inner side of the stirring blade 203;

[0054] Magnetic coupling exists between the above electromagnet 204 and the permanent magnet 205.

[0055] As Figure 9 shown, the electromagnets 204 are inserted into the mounting ring on the outer side of the stirring shaft 201 at intervals in pairs. The coils on the electromagnets 204 enter the wire channel 206 (not shown in the drawing) through the wire holes on the mounting ring. When in use, the magnetic field size is adjusted by changing the current size of the electromagnet 204, and then the rotational speed of the stirring blade 203 is adjusted.

[0056] It should be noted that magnetic drive is a prior art. Regarding how to change the various parameters of magnetic drive to obtain a predetermined rotational speed, those skilled in the art can set it according to the public materials without creative work, and no further limitation and description are made here; in addition, because the operation of the electromagnet 204 requires current and current change, the heat generation of the electromagnet 204 will be greater than that of the permanent magnet 205. Therefore, setting the electromagnet 204 on the stirring shaft 201 away from the raw materials can reduce the influence of the heat generation of magnetic drive on the mixing temperature of the raw materials; as Figure 9 shown, the number of the electromagnets 204 and the permanent magnets 205 is not used to limit the protection scope, and only the fact that they are arranged in pairs is illustrated.

[0057] Through the above technical solution, an electromagnet 204 is arranged on the stirring shaft 201, so that a circuit can be arranged through the stirring shaft 201 to adjust the magnetic field strength of the electromagnet 204, improving the adjustable parameters of the stirring equipment.

[0058] As a preferred embodiment, as Figure 3 and Figure 6 shown, the above mixing equipment further includes: a power supply unit 207 and a slip ring 208. The power supply unit 207 is connected to the barrel cover 102, and the power supply unit 207 is arranged around the outer side of the stirring shaft 201; the slip ring 208 is connected to the stirring shaft 201, the slip ring 208 is electrically connected to the electromagnet 204, and the slip ring 208 is in sliding contact with the power supply unit 207;

[0059] A number of electromagnets 204 are grouped and connected in series. The power supply unit 207 controls different stirring blades 203 to obtain different rotational speeds by independently controlling each group of electromagnets 204 connected in series.

[0060] During use, a carbon brush conduction method is used between the power supply unit 207 and the slip ring 208. The slip ring 208 is also connected to the electromagnet 204 finally through a wire passing through the side wall of the stirring shaft 201. The power supply unit 207 is powered by an external power supply, and then different slip rings 208 are powered according to the logic circuit and corresponding switches, so as to control the electromagnets 204 corresponding to different stirring blades 203 to be energized, so as to obtain the required rotational speed and torque. Exemplarily, as Figure 9 shown, there are a total of 12 electromagnets 204, distributed in the manner of a clock dial. Among them, 0 o'clock (12 o'clock), 4 o'clock, and 8 o'clock are powered by one slip ring 208, 1 o'clock, 5 o'clock, and 9 o'clock are powered by one slip ring 208, 2 o'clock, 6 o'clock, and 10 o'clock are powered by one slip ring 208, 3 o'clock, 7 o'clock, and 11 o'clock are powered by one slip ring 208, and the four slip rings 208 corresponding to the crushing blade 2031 are all energized to obtain a high rotational speed synchronized with the stirring shaft 201. The mixing blade 2032 is only energized corresponding to 2-3 of the slip rings 208 to obtain a moderate rotational speed out of step with the stirring shaft 201, and the anti-sticking bottom blade 2033 is only energized corresponding to one group of slip rings 208, and also needs to obtain a larger current to obtain a lower rotational speed more seriously out of step with the stirring shaft 201, but a larger torque.

[0061] It should be noted that the power supply unit 207 and its connection to the external power supply are not within the protection scope of this application. Any circuit that can meet the above-mentioned partitioned power supply function can be used. Those skilled in the art can arrange the corresponding control circuit as needed through technical manuals, textbooks, etc. The specific arrangement of the control circuit is not within the protection scope of this application, so no further description and limitation will be provided. If a local weak magnetic field area appears in the magnetic field distribution due to the reduction of the number of pairs of the electromagnet 204, compensation is carried out by obtaining the corresponding additional compensation current through a limited number of tests during the preliminary equipment installation. Exemplarily, the magnetic field distribution is monitored in real time through a Hall sensor to adjust the magnitude of the compensation current in the corresponding state, and compensation is carried out through the control circuit in the power supply unit 207 according to the preset magnitude of the compensation current. However, the specific compensation method is not within the protection scope of this application. This embodiment only proposes the possible technical defects of this part of the technical solution and how to further optimize it.

[0062] Through the above technical solution, the power supply unit 207 supplies power slidingly through the slip ring 208, and at the same time, the electromagnet 204 is grouped and controlled, which can facilitate the adjustment of the number of working electromagnets 204, thereby changing the magnetic field strength, and is more suitable for the mixed use of temperature-sensitive raw materials and the mixed scenario with a large rotational speed difference.

[0063] As a preferred implementation manner, as Figure 1 、 Figure 3 and Figure 4 shown, the above-mentioned mixing device further includes: a heat dissipation fluid 301 and a condensation cover 302. The heat dissipation fluid 301 is filled in the stirring shaft 201, and the heat dissipation fluid 301 absorbs the temperature generated by the electromagnet 204 and evaporates; the condensation cover 302 is threadedly connected to the top of the stirring shaft 201, and the evaporated heat dissipation fluid 301 is cooled and condensed at the condensation cover 302.

[0064] As Figure 7 shown, a V-shaped groove 304 is further opened on the side wall of the condensation cover 302. Through the groove 304, the area of the side wall of the condensation cover 302 is increased to improve the heat dissipation performance.

[0065] It should be noted that the heat dissipation fluid 301 is selected after tests according to the temperature required for mixing and the heat generation of the electromagnet 204. A single substance (such as pure water, Freon, etc.) or a mixture of multiple single substances can be used.

[0066] Through the above technical solution, the heat dissipation fluid 301 is filled in the stirring shaft 201, and based on the heat pipe heat dissipation principle, the heat generated by the electromagnet 204 is cooled, and the influence of the magnetic force transmission on the temperature in the mixing barrel is reduced.

[0067] As a preferred implementation manner, as Figure 1 and Figure 7As shown in the figure, the above-mentioned mixing device further includes: an integrated fan blade 303, which is connected to the top of the condensation cover 302. The integrated fan blade 303 rotates coaxially with the stirring shaft 201. When the integrated fan blade 303 rotates, it inhales air to cool the condensation cover 302.

[0068] Through the above technical solution, the integrated fan blade 303 rotates coaxially with the stirring shaft 201 to cool the condensation cover 302, reducing the setting of additional heat dissipation devices and simplifying the overall structure.

[0069] As a preferred embodiment, as Figure 4 and Figure 9 shown in the figure, the above-mentioned mixing device further includes: a wire channel 206. A plurality of wire channels 206 are opened inside the stirring shaft 201. The wire channels 206 are used for threading the wires connecting the slip rings 208 and the electromagnets 204, and the side walls of the wire channels 206 are in contact with the heat dissipation fluid 301.

[0070] During production, a seamless steel pipe can be used as the main body of the stirring shaft 201. After machining an arc groove on its side wall, a copper pipe is welded as the main body of the wire channel 206, while increasing the heat conduction ability.

[0071] Through the above technical solution, the wire channels 206 are used for wiring, and at the same time, the contact between the wire channels 206 and the heat dissipation fluid 301 is increased, improving the cooling effect on the heat generated by the wires. At the same time, the setting of the wire channels 206 enhances the rigidity of the stirring shaft 201.

[0072] As a preferred embodiment, the above-mentioned mixing device further includes: a thrust bearing 209, which is connected between the stirring blade 203 and the stirring shaft 201. The thrust bearing 209 is used to limit the relative positions of the stirring shaft 201 and the stirring blade 203.

[0073] Through the above technical solution, the thrust bearing 209 is used to avoid the displacement of the stirring blade 203 caused by the non-contact magnetic drive, and at the same time, it also bears the gravity of the stirring blade 203, improving the stability of the equipment operation.

[0074] The above is only the specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope recorded in the present invention can easily think of changes or substitutions, which should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An organic fertilizer mixing device with gradable stirring for compound fertilizer production, comprising a mixing barrel (101) and a barrel cover (102) connected to each other, characterized in that, Comprising: A stirring shaft (201), rotatably connected to the bucket lid (102); A stirring motor (202), connected to the bucket lid (102), the stirring motor (202) being in transmission connection with the stirring shaft (201); A plurality of stirring blades (203), magnetically driven and connected to the stirring shaft (201), the plurality of stirring blades (203) being arranged at intervals along the up and down direction of the stirring shaft (201), and the stirring blades (203) at different heights having different rotational speeds.

2. The organic fertilizer mixing equipment with gradable stirring for compound fertilizer production according to claim 1, characterized in that, Further comprising: A plurality of electromagnets (204), arranged annularly outside the stirring shaft (201); A plurality of permanent magnets (205), arranged annularly inside the stirring blades (203); The electromagnets (204) and the permanent magnets (205) are coupled by magnetic force.

3. The organic fertilizer mixing equipment with gradable stirring for compound fertilizer production according to claim 2, wherein, Further comprising: A power supply unit (207), connected to the bucket lid (102), the power supply unit (207) being arranged annularly outside the stirring shaft (201); A slip ring (208), connected to the stirring shaft (201), the slip ring (208) being electrically connected to the electromagnets (204), and the slip ring (208) being in sliding contact with the power supply unit (207); The plurality of electromagnets (204) are grouped and connected in series, and the power supply unit (207) controls different stirring blades (203) to obtain different rotational speeds by independently controlling each group of electromagnets (204) connected in series.

4. The organic fertilizer mixing equipment with gradable stirring for compound fertilizer production according to claim 3, characterized in that, Further comprising: A heat dissipation fluid (301), filled inside the stirring shaft (201), the heat dissipation fluid (301) absorbing the temperature generated by the electromagnets (204) and evaporating; A condensation cover (302), connected to the top of the stirring shaft (201), and the evaporated heat dissipation fluid (301) is cooled and condensed at the condensation cover (302).

5. The organic fertilizer mixing equipment for compound fertilizer production with gradable stirring according to claim 4, characterized in that, Further comprising: An integrated fan blade (303), connected to the top of the condensation cover (302), the integrated fan blade (303) rotating coaxially with the stirring shaft (201), and the air inhaled when the integrated fan blade (303) rotates cools the condensation cover (302).

6. The organic fertilizer mixing equipment for compound fertilizer production with gradable stirring according to claim 5, characterized in that, Further comprising: A plurality of wire channels (206), opened inside the stirring shaft (201), the wire channels (206) being used for threading wires connecting the slip ring (208) and the electromagnets (204), and the side walls of the wire channels (206) are in contact with the heat dissipation fluid (301).

7. The organic fertilizer mixing equipment for compound fertilizer production with gradable stirring according to claim 6, characterized in that, Further comprising: An end face bearing (209), connected between the stirring blade (203) and the stirring shaft (201), the end face bearing (209) being used to limit the relative positions of the stirring shaft (201) and the stirring blade (203).

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