Fertilizer stirrer with drying, crushing and smashing functions

Abstract

The utility model discloses a fertilizer stirrer with drying, crushing and crushing functions. The fertilizer stirrer comprises a bracket, a stirring hopper, a blanking hopper, a material conveying barrel, a rotating shaft, a spiral blade, a crushing blade, a crushing blade, a stirring blade, a material guide plate, a motor, a supporting plate, a material outlet, a material receiving box, an air inlet and an air outlet. An air inlet and an air outlet are formed, and hot air is used for drying fertilizer blocks in the stirring hopper and blowing the fertilizer blocks to the inner wall and the bottom of the stirring hopper at the same time, so that caking and adhesion of the fertilizer blocks on the inner wall of the stirring hopper and accumulation and caking at the bottom of the stirring hopper are avoided; a spiral blade is arranged to cut, extrude and crush the fertilizer blocks for the first time; multiple layers of crushing blades and crushing blades with the blade spacing from large to small and guide plates which are distributed in a crossed and staggered manner are arranged, and the fertilizer blocks are subjected to particle crushing and crushing from long to short and multiple repeated second-round crushing and crushing; a plurality of layers of stirring blades are arranged to repeatedly disperse, stir and mix the fertilizer blocks for multiple rounds.

Description

Technical Field

[0001] The utility model relates to the technical field of mixers of fertilizer production equipment, in particular to a fertilizer mixer with drying, crushing and pulverizing functions. Background Art

[0002] Fertilizer production equipment mainly consists of a turner, a crusher, a batching machine, a mixer, a granulator, a dryer, a cooler, a drum screening machine, a coating machine, and an automatic packaging machine. A crusher is a machine that crushes large-sized solid raw materials into required sizes. A crusher is generally composed of coarse crushing, fine crushing, wind conveying and other devices, and achieves the purpose of the crusher in the form of high-speed impact. A mixer is a machine in which a shaft with blades rotates in a cylinder or a trough to mix and stir a variety of raw materials to make them into a mixture. A dryer is a machine that directly transfers heat energy to the material during the drying process, so that the moisture of the material is continuously evaporated until the entire drying process is completed. The crusher, mixer and dryer are all basic equipment on the organic fertilizer production line. In the prior art, they are generally divided into three processes and three equipment for separate operations. In order to optimize the process and save costs, the three processes of crushing, mixing and drying can be combined into one process and completed in the same equipment. Summary of the invention

[0003] The purpose of the utility model is to solve the deficiencies of the prior art and to provide a fertilizer mixer with drying, crushing and pulverizing functions.

[0004] In order to achieve the above object, the utility model provides the following technical solutions:

[0005] A fertilizer mixer with drying, crushing and pulverizing functions comprises a bracket, a mixing bucket, a lower hopper, a feeding cylinder, a rotating shaft, a spiral blade, a crushing blade, a pulverizing blade, a mixing blade, a material guide plate, a motor, a support plate, a material discharge port, a material receiving box, an air inlet and an exhaust port.

[0006] The bracket is supported by four sub-brackets erected from bottom to top, the bottoms of the four sub-brackets are welded together by square support plates, and the four sub-brackets are symmetrically distributed at 90 degrees along the center of the square.

[0007] The mixing bucket is in a hollow cylindrical shape and is disposed inside the bracket. The outer wall of the mixing bucket is supported by the four sub-brackets and is welded to the tops of the four sub-brackets.

[0008] The lower hopper is a funnel with both upper and lower planes being square. The side length of the square of the upper plane of the lower hopper is greater than the side length of the square of the lower plane. The lower plane of the lower hopper is arranged in the middle of the top of the mixing bucket. The lower plane of the lower hopper and the top of the mixing bucket are connected by welding at the junction.

[0009] The feed cylinder is a hollow cylinder, which is arranged directly below the lower hopper and is arranged downward from the top of the lower hopper; the top of the feed cylinder and the top of the lower hopper are connected at the junction by welding; on the top plane of the feed cylinder, a mounting plate is arranged through the center of the top of the feed cylinder, and the mounting plate is welded to the top edge of the feed cylinder.

[0010] The rotating shaft is a solid round rod, and the rotating shaft is arranged at the inner center of the feeding cylinder. The top of the rotating shaft passes through the mounting plate and is defined by the mounting plate. The rotating shaft extends from top to bottom from the top center of the mixing bucket.

[0011] The spiral blade is a blade with a cutting edge that spirals downward. The spiral blade is arranged inside the feed barrel. The spiral blade is welded to the rotating shaft and is arranged from top to bottom along the rotating shaft. The radial outer end cutting edge of the spiral blade is tightly fitted with the inner wall of the feed barrel.

[0012] The crushing blade is a blade with a cutting edge, which is arranged directly below the feeding cylinder. The crushing blade is arranged in multiple layers from top to bottom along the rotating shaft. The radial inner end of the crushing blade is integrally formed into a circular sleeve to be engaged with the rotating shaft.

[0013] The crushing blade is a blade with a cutting edge and is arranged directly below the crushing blade. The crushing blades are arranged in multiple layers from top to bottom along the rotating shaft. The radial inner end of the crushing blade is integrally formed into a circular sleeve to be engaged with the rotating shaft.

[0014] The stirring blade is a rotary vane structure and is disposed directly below the crushing blade. The stirring blade is arranged in multiple layers from top to bottom along the rotating shaft. The radial inner end of the stirring blade is integrally formed into a circular sleeve that is engaged with the rotating shaft.

[0015] The material guide plate is a baffle which is arranged around the circumference of the inner wall of the mixing bucket, tilted downward at a certain angle, and distributed corresponding to the position of each layer of blades or blades of the crushing blade, the pulverizing blade and the mixing blade. The material guide plate is arranged on the inner wall of the mixing bucket along the axial direction of the mixing bucket, and the material guide plate is welded to the inner wall of the mixing bucket.

[0016] The motor is fixed on a transverse support plate at the bottom of the bracket, and the rotating shaft passes through the bottom of the mixing bucket, extends downward, and then is covered with a sleeve, and is connected to the driving shaft of the motor by a belt.

[0017] The material discharge port is a circular hole, which is arranged at the bottom center of the mixing bucket. The material receiving box is arranged below the material discharge port. The material receiving box and the material discharge port are connected through a material discharge pipe.

[0018] The air inlet is two metal cylinders, which are arranged at the bottom of the mixing bucket and 20-30 mm away from the discharge port. The air inlet is welded to the bottom of the mixing bucket.

[0019] The exhaust ports are two through holes, which are opened at the top edge of the mixing bucket.

[0020] Preferably, on the inner wall of the mixing bucket, at the connection point of each layer of material guide plates, blowing holes are opened along the circumference of the inner wall of the mixing bucket; on the bottom inner wall of the mixing bucket, with the bottom center as the center of the circle, blowing holes are opened along the circumference of the bottom of the mixing bucket; the blowing holes and the air inlet are interconnected in the middle of the inner wall and the outer wall of the mixing bucket.

[0021] Preferably, the air inlet and the exhaust port are connected to another hot air supply system through a hot air duct; the air inlet and the exhaust port are screwed to the outer wall of the mixing bucket by an external hexagonal nut, and reinforced with a sealing ring, and the circular inner wall at the other end of the external hexagonal nut is connected to a plastic buckle and reinforced with a rubber sealing ring, while the plastic buckle can be pressed to install and disassemble the hot air duct.

[0022] By adopting the above technical scheme, on the one hand, hot air can be used to dry the fertilizer blocks in the mixing bucket, and on the other hand, hot air can be blown toward the inner wall and bottom of the mixing bucket to prevent the fertilizer blocks from clumping and adhering to the inner wall of the mixing bucket and accumulating and clumping at the bottom of the mixing bucket.

[0023] Preferably, the number of layers of the crushing blades is 3, and in the direction of the central axis, the spacing between adjacent crushing blades in each layer from top to bottom is 20-25 mm, 15-20 mm, and 10-15 mm respectively.

[0024] By adopting the technical solution, the fertilizer blocks can be broken into particles from long to short from top to bottom.

[0025] Preferably, the number of layers of the crushing blades is 3, and in the direction of the central axis, the spacing between adjacent crushing blades in each layer from top to bottom is 8-10 mm, 5-8 mm, and 2-5 mm respectively.

[0026] By adopting the above technical solution, the fertilizer blocks can be crushed from long to short particles from top to bottom.

[0027] Preferably, the crushing blades, pulverizing blades, stirring blades and material guide plates are all multi-layer structures, and each layer of the crushing blades, pulverizing blades and stirring blades is respectively and alternately distributed with each layer of the material guide plates.

[0028] By adopting the above technical scheme, the fertilizer blocks can be repeatedly broken, pulverized, stirred, dispersed and mixed inside the mixing bucket, so that the fertilizer blocks can be broken, pulverized and stirred more evenly and fully.

[0029] Preferably, the crushing blade and the pulverizing blade are parabolic arc blade structures, and the cutting edges of the crushing blade and the pulverizing blade face the radial outer end direction of the arc.

[0030] By adopting the above technical solution, the cutting edges of the crushing blade and the pulverizing blade can crush and pulverize the fertilizer blocks only during the rotation process, and the crushing and pulverizing time on the fertilizer blocks can be longer.

[0031] Preferably, the number of the crushing blades and pulverizing blades in each layer is 6 or 8.

[0032] By adopting the above technical scheme, on the one hand, it can be ensured that the crushing blades and pulverizing blades of each layer form a symmetrical structure, ensuring the uniformity and balance of the structure during rotational crushing and pulverizing; on the other hand, more crushing blades and pulverizing blades in each layer can ensure sufficient cutting, crushing and pulverizing of the fertilizer blocks.

[0033] Preferably, the number of layers of the stirring blades is 3 or more, and the number of stirring blades in each layer is 6 or 8.

[0034] By adopting the above technical scheme, it is possible to ensure that the fertilizer blocks are dispersed, stirred and mixed repeatedly; it is also possible to ensure that the stirring blades of each layer form a symmetrical structure, ensuring the uniformity and balance of the structure during rotation and stirring; more stirring blades per layer can ensure that the fertilizer blocks are fully dispersed, stirred and mixed.

[0035] Preferably, the lower hopper, feed barrel, crushing blade, pulverizing blade, stirring blade and guide plate are all symmetrically arranged with the central axis of the stirring bucket as the center.

[0036] By adopting the above technical solution, the main components of the mixer can form a uniformly distributed structure, with the center and center of gravity both located on the central axis.

[0037] The beneficial effects of the utility model are:

[0038] 1. The air inlet and the air outlet are connected to another hot air supply system through the hot air duct, and the fertilizer blocks in the mixing bucket are dried and dried with hot air, and at the same time, blown to the inner wall and bottom of the mixing bucket to prevent the fertilizer blocks from clumping and adhering to the inner wall of the mixing bucket and accumulating and clumping at the bottom of the mixing bucket;

[0039] 2. Set the spiral blade to cut, squeeze and crush the fertilizer blocks in the first round;

[0040] 3. Set up multiple layers of crushing blades and pulverizing blades with blade spacing from large to small and cross-distributed guide plates to crush and pulverize fertilizer blocks from long to short particles and repeat the second round of crushing and pulverizing for multiple times;

[0041] 4. Multiple layers of stirring blades are set to disperse, stir and mix the fertilizer blocks repeatedly in multiple rounds; BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0043] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0044] Figure 1 The utility model discloses a cross-sectional structural diagram of a fertilizer mixer with drying, crushing and pulverizing functions.

[0045] Figure 1 Shown in: 1. bracket, 2. mixing bucket, 3. lower hopper, 4. feed barrel, 5. rotating shaft, 6. spiral blade, 7. crushing blade, 8. crushing blade, 9. mixing blade, 10. guide plate, 11. motor, 12. support plate, 13. discharge port, 14. receiving box, 15. air inlet, 16. exhaust port. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0047] The terms such as "left", "right", "upper", "lower" etc. cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships shall be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0048] Reference Figure 1 The utility model discloses a fertilizer mixer with drying, crushing and pulverizing functions, comprising a bracket 1, a mixing bucket 2, a lower hopper 3, a feeding cylinder 4, a rotating shaft 5, a spiral blade 6, a crushing blade 7, a pulverizing blade 8, a mixing blade 9, a guide plate 10, a motor 11, a support plate 12, a material outlet 13, a material receiving box 14, an air inlet 15, and an exhaust port 16.

[0049] The bracket 1 is supported by 4 sub-brackets erected from bottom to top, and is used to support the mixer; a mixing bucket 2 is arranged inside the bracket 1, and the outer wall of the mixing bucket 2 is welded and fixed to the top of the 4 sub-brackets; a lower hopper 3 is arranged above the top of the mixing bucket 2, and the bottom of the lower hopper 3 is welded and fixed to the top of the mixing bucket 2; a feeding cylinder 4 is arranged directly below the lower hopper 3, and the top of the feeding cylinder 4 is welded and fixed to the top of the mixing bucket 2; a solid round rod-shaped rotating shaft 5 is arranged at the inner center of the feeding cylinder 4, and a spiral blade 6 spiraling downward is arranged on the rotating shaft 5 from top to bottom, and the spiral blade 6 is welded and connected to the rotating shaft 5, and the radial outer end cutting edge of the spiral blade 6 is tightly fitted with the inner wall of the feeding cylinder 4;

[0050] Three layers of crushing blades 7 are arranged directly below the feeding cylinder 4, and the spacing between adjacent rotating blades in each layer from top to bottom is 20-25 mm, 15-20 mm, and 10-15 mm respectively; three layers of crushing blades 8 are arranged directly below the crushing blades 7, and the spacing between adjacent rotating blades in each layer from top to bottom is 8-10 mm, 5-8 mm, 2-5 mm respectively. mm; the crushing blade 7 and the crushing blade 8 are both parabolic arc blade structures, with the blade edge facing the radial outer end of the arc, and the number of crushing blades and crushing blades in each layer is 6 or 8; more than 3 layers of stirring blades 9 are arranged directly below the crushing blade 8, and the number of stirring blades in each layer is 6 or 8, and the stirring blades 9 are of a rotary blade structure, and the radial inner end of the stirring blade 9 is integrally formed into a circular sleeve to be engaged with the rotating shaft; a guide plate 10 corresponding to the position of each layer of the crushing blade 7 and the crushing blade 8 and each layer of the stirring blade 9 is arranged on the circumference of the inner wall of the mixing bucket 2, and the crushing blade 7, the crushing blade 8, the stirring blade 9 and the guide plate 10 are all multi-layer structures, and each layer of the rotating blade 7, the crushing blade 8, the stirring blade 9 and the guide plate 10 are interlaced and staggered with each other;

[0051] The motor 11 is fixed on the horizontal support plate 12 at the bottom of the bracket 1, and the rotating shaft 5 passes through the bottom of the mixing bucket 2, extends downward and then is covered with a sleeve, and is belt-connected to the driving shaft of the motor 11; a discharge port 13 is arranged at the bottom center of the mixing bucket 2, and a material receiving box 14 is connected below the discharge port 13; an air inlet 15 is arranged at the bottom of the mixing bucket 2, and blowing holes are opened at the connection between each layer of guide plates 10 on the circumference of the inner wall of the mixing bucket 2 and on the circumference of the bottom, and the blowing holes and the air inlet 15 are interconnected in the middle of the inner wall and the outer wall of the mixing bucket 2; an exhaust port 16 is arranged at the top edge of the mixing bucket 2, and the air inlet 15 and the exhaust port 16 are connected to another hot air supply system through a hot air duct.

[0052] The working process of the fertilizer mixer with drying, crushing and pulverizing functions of the utility model is as follows:

[0053] 1. Fertilizer blocks enter the feeding tube 4 from the lower hopper 3;

[0054] 2. Start the motor 11, the rotating shaft 5 starts to rotate, driving the spiral blade 6, the crushing blade 7, the pulverizing blade 8 and the stirring blade 9 to start rotating;

[0055] 3. The fertilizer blocks are cut, squeezed and broken in the first round by the spiral blade 6 in the feeding tube 4;

[0056] 4. The fertilizer blocks are transported from top to bottom until they fall onto the first layer of crushing blades 7;

[0057] 5. The fertilizer blocks are cut and crushed by the first layer of crushing blades 7;

[0058] 6. After the fertilizer blocks are broken by the first layer of breaking blades 7, they are thrown onto the inner wall of the mixing bucket 2 under the action of centrifugal force, and then blocked by the air holes and the guide plate 10, and then fall onto the second layer of breaking blades 7;

[0059] 7. Repeat steps 5-6 in this way until the fertilizer blocks fall onto the last layer of crushing blades 7;

[0060] 8. After the fertilizer blocks are crushed by the last layer of crushing blades 7, they are thrown onto the inner wall of the mixing bucket 2 under the action of centrifugal force, and then blocked by the air holes and the guide plate 10, and then fall onto the first layer of crushing blades 8;

[0061] 9. The fertilizer blocks are cut and crushed by the first layer of crushing blades 8;

[0062] 10. After the fertilizer blocks are crushed by the first layer of crushing blades 8, they are thrown onto the inner wall of the mixing bucket 2 under the action of centrifugal force, and then blocked by the air holes and the guide plate 10, and then fall onto the second layer of crushing blades 8;

[0063] 11. Repeat steps 9-10 in this way until the fertilizer blocks fall onto the last layer of crushing blades 8;

[0064] 12. After the fertilizer blocks are crushed by the last layer of crushing blades 8, they are thrown onto the inner wall of the mixing bucket 2 under the action of centrifugal force, and then blocked by the air holes and the guide plate 10, and then fall onto the first layer of mixing blades 9;

[0065] 13. After being stirred by the first layer of stirring blades 9, the fertilizer blocks are thrown onto the inner wall of the stirring bucket 2 under the action of centrifugal force, and then blocked by the air holes and the guide plate 10, and then fall onto the second layer of stirring blades 9;

[0066] 14. Repeat step 13 in this way until the fertilizer block falls onto the last layer of mixing blades 9;

[0067] 15. After being stirred by the last layer of stirring blades 9, the fertilizer blocks are thrown onto the inner wall of the stirring bucket 2 under the action of centrifugal force, and then blocked by the air holes and the guide plate 10, and fall to the bottom of the stirring bucket 2;

[0068] 16. The fertilizer blocks slide down along the bottom of the mixing bucket 2 to the discharge port 13 and reach the receiving box 14 through the discharge pipe.

[0069] During this process, the air inlet 15 and the exhaust port 16 are connected to another hot air supply system through a hot air duct. The hot air enters from the air inlet 15, blows toward the interior of the mixing bucket 2 through the blowing holes on the bottom and inner wall of the mixing bucket 2, dries and dryes the fertilizer blocks inside the mixing bucket 2, is discharged from the exhaust port 16 on the top of the mixing bucket 2, enters the hot air supply system, is heated, and then re-enters from the air inlet 1, forming a repeated cycle of hot air, which dries and drys the fertilizer blocks inside the mixing bucket 2.

[0070] Of course, the embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A fertilizer mixer with drying, crushing and pulverizing functions, characterized in that: It comprises a bracket (1), a stirring bucket (2), a lower hopper (3), a feeding cylinder (4), a rotating shaft (5), a spiral blade (6), a crushing blade (7), a pulverizing blade (8), a stirring blade (9), a material guide plate (10), a motor (11), a support plate (12), a material outlet (13), a material receiving box (14), an air inlet (15), and an air outlet (16); The support (1) is supported by four sub-supports erected from bottom to top, the bottoms of the four sub-supports are welded together by square support plates, and the four sub-supports are symmetrically distributed at 90° along the center of the square; The stirring bucket (2) is in a hollow cylindrical shape and is arranged inside the bracket (1); the outer wall of the stirring bucket (2) is supported by the four sub-brackets and is welded to the tops of the four sub-brackets; The lower hopper (3) is a funnel with both upper and lower planes being square. The side length of the square of the upper plane of the lower hopper (3) is greater than the side length of the square of the lower plane. The lower plane of the lower hopper (3) is arranged in the middle of the top of the stirring bucket (2). The lower plane of the lower hopper (3) and the top of the stirring bucket (2) are connected by welding at the junction. The feeding cylinder (4) is a hollow cylinder, and the feeding cylinder (4) is arranged directly below the lower hopper (3). The feeding cylinder (4) is arranged downward from the top of the lower hopper (3); the top of the feeding cylinder (4) and the top of the lower hopper (3) are connected by welding; on the top plane of the feeding cylinder (4), a mounting plate is arranged through the center of the top of the feeding cylinder (4), and the mounting plate is welded to the top edge of the feeding cylinder (4); The rotating shaft (5) is in the shape of a solid round rod, and the rotating shaft (5) is arranged at the inner center of the feeding cylinder (4). The top of the rotating shaft (5) passes through the mounting plate and is defined by the mounting plate. The rotating shaft (5) extends from the top center of the mixing bucket (2) downward from the top. The spiral blade (6) is a blade with a cutting edge that spirals downward. The spiral blade (6) is arranged inside the feeding tube (4). The spiral blade (6) is welded to the rotating shaft (5) and arranged from top to bottom along the rotating shaft (5). The radial outer end cutting edge of the spiral blade (6) is tightly fitted with the inner wall of the feeding tube (4). The crushing blade (7) is a blade with a cutting edge and is arranged directly below the feeding cylinder (4). The crushing blade (7) is arranged in multiple layers from top to bottom along the rotating shaft (5). The radial inner end of the crushing blade (7) is integrally formed into a circular sleeve that is engaged with the rotating shaft (5). The crushing blade (8) is a blade with a cutting edge and is arranged directly below the crushing blade (7). The crushing blade (8) is arranged in multiple layers from top to bottom along the rotating shaft (5). The radial inner end of the crushing blade (8) is integrally formed into a circular sleeve and is engaged with the rotating shaft (5). The stirring blade (9) is a rotary blade structure and is arranged directly below the crushing blade (8). The stirring blade (9) is arranged in multiple layers from top to bottom along the rotating shaft (5). The radial inner end of the stirring blade (9) is integrally formed into a circular sleeve and is engaged with the rotating shaft (5). The guide plate (10) is a baffle plate which is arranged around the inner wall of the mixing bucket (2), tilted downward at a certain tilt angle, and distributed corresponding to the position of each layer of blades or blades of the crushing blade (7), the pulverizing blade (8) and the mixing blade (9). The guide plate (10) is arranged on the inner wall of the mixing bucket (2) along the axial direction of the mixing bucket (2), and the guide plate (10) is welded to the inner wall of the mixing bucket (2); The motor (11) is fixed on a transverse support plate (12) at the bottom of the bracket (1); the rotating shaft (5) passes through the bottom of the mixing bucket (2), extends downward, and is then covered with a sleeve, and is connected to the driving shaft of the motor (11) by a belt; The discharge port (13) is a circular hole, which is arranged at the bottom center of the mixing bucket (2); the material receiving box (14) is arranged below the discharge port (13); the material receiving box (14) and the discharge port (13) are connected via a discharge pipe; The air inlet (15) is two metal cylinders, which are arranged at the bottom of the stirring bucket (2) and are 20-30 mm away from the discharge port (13). The air inlet (15) is welded to the bottom of the stirring bucket (2); The exhaust ports (16) are two through holes, which are opened at the top edge of the stirring bucket (2).

2. A fertilizer mixer with drying, crushing and pulverizing functions according to claim 1, characterized in that: On the inner wall of the mixing bucket (2), at the connection point of each layer of the material guide plate (10), a blowing hole is opened along the circumference of the inner wall of the mixing bucket (2); on the inner wall of the bottom of the mixing bucket (2), with the bottom center as the center of the circle, a blowing hole is opened along the circumference of the bottom of the mixing bucket (2); the blowing hole and the air inlet (15) are interconnected in the middle of the inner wall and the outer wall of the mixing bucket (2).

3. The fertilizer mixer with drying, crushing and pulverizing functions according to claim 1, characterized in that: The air inlet (15) and the air outlet (16) are connected to another hot air supply system via a hot air duct; the air inlet (15) and the air outlet (16) are respectively screwed to the outer wall of the stirring bucket (2) by an external hexagonal nut and reinforced with a sealing ring; the circular inner wall at the other end of the external hexagonal nut is connected to a plastic buckle and reinforced with a rubber sealing ring, and the hot air duct can be installed and removed in a pressable manner by the plastic buckle.

4. The fertilizer mixer with drying, crushing and pulverizing functions according to claim 1, characterized in that: The number of layers of the crushing blades (7) is 3, and in the direction of the central axis, the spacing between adjacent crushing blades in each layer from top to bottom is 20-25 mm, 15-20 mm, and 10-15 mm respectively.

5. The fertilizer mixer with drying, crushing and pulverizing functions according to claim 1, characterized in that: The number of layers of the crushing blades (8) is 3, and in the direction of the central axis, the spacings between adjacent crushing blades in each layer from top to bottom are 8-10 mm, 5-8 mm, and 2-5 mm, respectively.

6. A fertilizer mixer with drying, crushing and pulverizing functions according to claim 1, characterized in that: The crushing blades (7), the pulverizing blades (8), the stirring blades (9) and the guide plates (10) are all multi-layer structures, and each layer of the crushing blades (7), the pulverizing blades (8) and the stirring blades (9) are respectively and cross-distributed with each layer of the guide plates (10).

7. The fertilizer mixer with drying, crushing and pulverizing functions according to claim 1, characterized in that: The crushing blade (7) and the pulverizing blade (8) are parabolic arc blade structures, and the cutting edges of the crushing blade (7) and the pulverizing blade (8) face the radial outer end direction of the arc.

8. The fertilizer mixer with drying, crushing and pulverizing functions according to claim 1, characterized in that: The number of the crushing blades (7) and the pulverizing blades (8) in each layer is 6 or 8.

9. The fertilizer mixer with drying, crushing and pulverizing functions according to claim 1, characterized in that: The number of layers of the stirring blades (9) is more than 3, and the number of stirring blades (9) in each layer is 6 or 8.

10. The fertilizer mixer with drying, crushing and pulverizing functions according to claim 1, characterized in that: The lower hopper (3), the feeding cylinder (4), the crushing blade (7), the pulverizing blade (8), the stirring blade (9), and the material guide plate (10) are all symmetrically arranged with the central axis of the stirring bucket (2) as the center.

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